CN119042386B - High-precision electric head control box based on screw control - Google Patents
High-precision electric head control box based on screw control Download PDFInfo
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- CN119042386B CN119042386B CN202411496897.1A CN202411496897A CN119042386B CN 119042386 B CN119042386 B CN 119042386B CN 202411496897 A CN202411496897 A CN 202411496897A CN 119042386 B CN119042386 B CN 119042386B
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- 238000007906 compression Methods 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 13
- 230000033001 locomotion Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
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- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a high-precision electric head control box based on screw control, which relates to the technical field of electric head control boxes and comprises a valve body and a mechanical control box arranged on the valve body, wherein a screw control assembly is arranged in the mechanical control box, the screw control assembly comprises a travel input shaft, a main shaft screw, a travel switch sliding block, an opening Cheng Weidong switch and a closing travel micro switch, the travel input shaft is rotationally connected with the valve body, one end of the travel input shaft is used for connecting power input of an electric actuator, the other end of the travel input shaft is in transmission connection with the main shaft screw, the main shaft screw is sheathed with the travel switch sliding block in a threaded manner, the opening Cheng Weidong switch and the closing travel micro switch are arranged at intervals along the axial direction of the main shaft screw, the installation position of the opening Cheng Weidong switch and the installation position of the closing travel micro switch can be adjusted along the axial direction of the main shaft screw, and the travel switch sliding block is used for singly triggering the opening Cheng Weidong switch or the closing travel micro switch, and the transmission precision is high, and the high-speed high-sensitivity rigidity scene can be applied.
Description
Technical Field
The invention relates to the technical field of electric head control boxes, in particular to a high-precision electric head control box based on screw control.
Background
The electric head control box is mainly used for controlling the opening and closing states of the valves and feeding back the opening and closing state information of the valves, is matched with an electric actuator to be used, and is used for transmitting power through the electric actuator, the electric actuator inputs power to control the opening and closing of the valves, and the electric head control box feeds back the opening and closing states of the valves. The traditional Russian switch type electric head control box is basically used in the market, and the travel switch control mode of the traditional Russian switch type electric head control box is that after a coaxial subsidiary gear on a worm wheel shaft in a box body of the electric head control box passes through a plurality of stages of transmission gears, a travel matching wheel is driven to rotate, the travel matching wheel is connected with a travel transmission shaft in the electric head control box into a whole through a shaft, the travel transmission shaft drives a gear on a travel torque main shaft to rotate through an subsidiary worm, so that the travel torque main shaft coaxially rotates, a main travel switch and a standby travel switch are arranged on the main shaft, a travel main gear is arranged on the travel transmission shaft, a nearby travel subsidiary gear is driven through meshing among the gears, the compression force of a compression spring on the upper part of the travel subsidiary gear is utilized to enable the main travel switch to generate downward pressure corresponding to the running direction of an electric actuating mechanism, and as the travel switch groove rotates, a deflector rod of the main travel switch is pressed into the groove, then the corresponding travel micro switch is pressed down, and a switch signal is transmitted, and the main travel mechanism is also called a quick-acting device. If the standby travel switch is used, the cam of the standby travel switch rotates along with the main shaft until the cam presses the standby travel micro switch, the motor is cut off, the valve switch is in place, the switch signal is transmitted, and the moment switch only plays a role in protection. Therefore, the traditional Russian switching type electric head control box has the advantages that the electric head travel micro switch presses or loosens the travel micro switch through two grooves distributed along the same circumference of the deflector rod, so that the travel adjustment basic principle is to adapt to the actual travel of the valve by adjusting the angle between the two grooves, and the problems of limited adjustment range (angle), low control precision, difficult moment range adjustment and the like exist in the same circumference, and the traditional Russian switching type electric head control box is not suitable in a certain use scene with high precision requirements, such as control of a valve of a nuclear power plant.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a high-precision electric head control box based on screw rod control, which is used for solving the defects of the prior art.
The invention aims at realizing the technical scheme that the high-precision electric head control box based on lead screw control is used for connecting a switching signal of an electric actuator feedback valve and comprises a valve body and a mechanical control box arranged on the valve body, wherein a lead screw control assembly is arranged in the mechanical control box and comprises a travel input shaft, a main shaft lead screw, a travel switch sliding block, an opening Cheng Weidong switch and a closing travel micro switch, the travel input shaft is rotationally connected with the valve body, one end of the travel input shaft is used for connecting power input of the electric actuator, the other end of the travel input shaft is in transmission connection with the main shaft lead screw, a travel switch sliding block is sleeved on the main shaft lead screw in a threaded manner, the opening Cheng Weidong switch and the closing travel micro switch are arranged at intervals along the axial direction of the main shaft lead screw, the installation position of the opening Cheng Weidong switch and the installation position of the closing travel micro switch can be adjusted along the axial direction of the main shaft lead screw, and the travel switch sliding block is used for singly triggering the opening Cheng Weidong switch or the closing travel micro switch.
Further, the screw control assembly further comprises a left support plate, a right support plate and a main shaft screw rod fixing shaft, wherein the left support plate and the right support plate are installed on the valve body through screws, the main shaft screw rod is rotatably installed on the left support plate and the right support plate, two ends of the main shaft screw rod fixing shaft are fixedly connected with the left support plate and the right support plate respectively, and the travel switch sliding block is slidably sleeved on the main shaft screw rod fixing shaft.
Further, two groups of sliding rails are fixed between the left supporting plate and the right supporting plate, sliding rail sliding blocks are slidably matched on the sliding rails, the sliding rail sliding blocks are abutted to the sliding rails through screws, and the opening Cheng Weidong switch and the closing stroke microswitch are respectively arranged on the two groups of sliding rail sliding blocks of the sliding rails.
Further, the top of travel switch slider is connected with the travel control board, be provided with two sets of travel trigger subassembly on the travel control board, travel trigger subassembly includes connecting rod and gyro wheel, the one end of connecting rod is connected the travel control board, and the other end rotates to be connected with the gyro wheel, the contact at switch top of switch of going Cheng Weidong is located one of them the travel path of gyro wheel, the contact at switch top of closing is located another the travel path of gyro wheel.
Further, a stroke input bevel gear is sleeved on the stroke input shaft, a lead screw input bevel gear is sleeved on the main shaft lead screw, the lead screw input bevel gear is meshed with the stroke input bevel gear, and one end of the stroke input shaft penetrates out of the bottom of the valve body to be connected with a stroke matching wheel.
Further, the one end that the main shaft lead screw kept away from the stroke input shaft passes through the transmission of large scale deceleration subassembly and connects the dial plate gear axle, the dial plate gear axle is close to the one end of mechanical control box inner wall is fixed with the dial plate pointer, the lateral wall of mechanical control box is provided with transparent dial plate lid, transparent dial plate lid is followed self circumferencial direction and is marked with the scale, transparent dial plate lid is used for showing the dial plate pointer.
Further, the large-scale speed reduction assembly comprises a grooved wheel shaft which is rotatably arranged, and a driving disc which is sleeved on the spindle screw, wherein a driving shaft is eccentrically fixed on the driving disc, grooved wheels are assembled on the grooved wheel shaft, a plurality of arc-shaped grooves are uniformly distributed on the side walls of the grooved wheels along the circumferential direction of the grooved wheels, the driving shaft is used for acting on the arc-shaped grooves to drive the grooved wheels to deflect, a dial gear is sleeved on a dial gear shaft, a grooved wheel shaft gear is sleeved on the grooved wheel shaft, and the grooved wheel shaft gear is meshed with the dial gear.
Further, a torque control assembly is further arranged in the mechanical control box, the torque control assembly comprises a torque input gear shaft, a torque control screw and two groups of symmetrically arranged torque switch assemblies, the torque input gear shaft and the torque control screw are both rotationally arranged, the torque input gear shaft is connected with the torque control screw through a gear set in a transmission mode, the torque switch assembly comprises a torque micro switch and a torque screw slider, the torque screw slider is in threaded sleeve connection with the torque control screw, and the torque screw slider is used for triggering the torque micro switch.
Further, the torque control assembly further comprises a torque screw fixing shaft and a switch mounting shaft which are fixedly arranged, the torque screw slider is slidably sleeved on the torque screw fixing shaft, and the torque micro switch is sleeved on the switch mounting shaft.
Further, when the moment screw slider triggers the double-control switch, the double-control switch triggers the moment micro switch, the double-control switch comprises a switch shell, a trigger rod and a 7-shaped mounting rod, one end of the 7-shaped mounting rod is fixedly mounted on the switch mounting shaft, the trigger rod is vertically arranged and is in sliding connection with the 7-shaped mounting rod, the switch shell is slidably sleeved on the trigger rod, the bottom of the trigger rod is in arc transition and is positioned on the moving path of the moment screw slider, and the contact of the moment micro switch is positioned on the moving path of the switch shell;
When the travel switch sliding block triggers the contact of the switch-on Cheng Weidong, the travel switch sliding block presses down one of the double-control switches to enable the double-control switch to act on the contact of the corresponding moment micro switch;
When the travel switch sliding block triggers the contact of the travel micro switch, the travel switch sliding block presses down the other double-control switch, so that the double-control switch acts on the contact of the corresponding moment micro switch.
Further, the switch casing includes casing, switch main part and switch control panel, the both ends of switch main part are connected respectively go up casing and switch control panel, moment micro-gap switch's contact is located on the travel path of switch control panel, be provided with the switch shaft in the switch casing, the switch shaft activity passes the trigger lever is connected 7 font installation pole, the top of trigger lever is fixed with the cavity and falls the round platform, the top of switch shaft is fixed with the round platform, the cavity falls the round platform and is located the below of round platform, be provided with the spring between round platform and the cavity and fall the round platform, the both ends of spring are connected respectively hollow and fall round platform and round platform, the top of round platform is connected with jack-up spring, jack-up spring is kept away from the one end of round platform is connected the interior roof of last casing, the inside wall slip of last casing is provided with the support wedge, the support wedge has the degree of freedom of following the horizontal direction removal, the bottom of support wedge is provided with the wedge, when double control switch acts on the moment on the top of switch, the spring is in the compression state when the round platform is in the jack-up contact.
Further, the wedge mounting groove is formed in the inner side wall of the upper shell, the switch pin is fixed in the wedge mounting groove, the support wedge is slidably sleeved on the switch pin, and the limit spring is sleeved on the switch pin and is in a normal state when the support wedge contacts the bottom of the round table.
Further, the side wall of the trigger rod is provided with a sliding groove in a penetrating mode, the sliding groove extends along the axial direction of the trigger rod, the 7-shaped mounting rod penetrates through the sliding groove in a sliding mode, one end of the 7-shaped mounting rod is provided with a mounting hole, and the switch mounting shaft is fixedly arranged in the mounting hole in a penetrating mode.
Further, the gear set is arranged on one side of the torque control screw, the gear set comprises a torque gear shaft, a torque screw bevel gear and a bevel gear, the torque gear shaft is rotatably arranged in the mechanical control box, the torque screw bevel gear is sleeved on the torque control screw, the bevel gear is sleeved on the torque gear shaft, the bevel gear is meshed with the torque screw bevel gear, an input bevel gear and a torque input bevel gear are respectively sleeved on the torque input gear shaft and the torque gear shaft, the torque input bevel gear is meshed with the input bevel gear, and one end of the torque input gear shaft penetrates out of the bottom of the valve body to be connected with a torque matching wheel.
The beneficial effects of the invention are as follows:
1. The stroke range is controlled through screw transmission, namely, the stroke switch sliding block is used for triggering the stroke switch to feed back the valve to open the stroke in place, and the stroke switch sliding block is used for triggering the stroke switch to feed back the valve to close the stroke in place, so that the transmission precision is high, the transmission efficiency is high, and the device is applicable to high-speed high-sensitivity rigid scenes.
2. The relative distance between the opening travel micro switch and the closing travel micro switch is adjustable, and the travel range can be adjusted, so that the positions of the opening travel micro switch and the closing travel micro switch can be correspondingly adjusted according to the switch range of the valve, the electric head control box can adapt to valves of various types, the types of using control boxes are reduced, and the electric head control box has good compatibility.
3. The torque is adjusted by adopting a screw transmission mode, and the torque micro switch is triggered by the linear movement of the torque screw slide block, so that the control precision is high, the operability is high, and the control is stable.
4. The rotating speed of the spindle screw rod transmitted to the dial gear shaft is reduced through the grooved pulley structure, the valve opening and closing position is fed back through the dial pointer, the rotating speed of the dial gear shaft can be well reduced through the grooved pulley structure, the occupied area is small, and the device can be suitable for the installation of a limited space of a mechanical control box.
5. The stroke control and moment control components are in modularized design, so that the whole machine is conveniently assembled in the mechanical control box, and the machine is convenient to disassemble and assemble and maintain in the later period.
6. The motion of the moment micro switch is controlled through the mode of double triggering of the moment screw slide block and the double control switch, under the normal state, the double control switch triggers the moment micro switch to transmit a normal signal, and when abnormality occurs, the moment screw slide block triggers the double control switch, so that the double control switch is separated from the moment micro switch, the moment micro switch transmits an abnormal signal and gives an alarm, the abnormal alarm is more accurate, the influence of vibration is avoided, and the situation of false alarm is avoided.
7. The gear set for driving the moment control screw rod to run is arranged on one side of the moment control assembly, and the axial space of the moment control screw rod is insufficient, so that the gear set is arranged by utilizing the space allowance of the mechanical control box in the radial direction of the moment control screw rod, the moment control assembly can run stably, and the space in the mechanical control box can be reasonably utilized for layout and installation, so that the whole electric head control box has more compact structure and smaller volume.
Drawings
FIG. 1 is a schematic diagram of a part of a high-precision electric head control box based on screw control;
FIG. 2 is a schematic illustration of an assembly between a travel portion and a torque control assembly according to the present invention;
FIG. 3 is a second schematic view of the assembly between the travel portion and the torque control assembly of the present invention;
FIG. 4 is a third schematic view of the assembly between the travel portion and the torque control assembly of the present invention;
FIG. 5 is a schematic diagram of a dual control switch in a high precision electric head control box based on lead screw control according to the present invention;
FIG. 6 is a schematic diagram of the internal structure of a dual control switch in a high-precision electric head control box based on screw control;
FIG. 7 is a schematic diagram of a high-precision electric head control box based on screw control;
FIG. 8 is a schematic diagram II of a high-precision electric head control box based on screw control;
In the figure, a 1-valve body, a 2-mechanical control box, a 3-stroke input shaft, a 4-spindle screw, a 5-stroke switch slider, a 6-on Cheng Weidong switch, a 7-off stroke microswitch, an 8-left support plate, a 9-right support plate, a 10-spindle screw fixed shaft, a 11-slide rail, a 12-slide rail slider, a 13-stroke control plate, a 14-connecting rod, a 15-roller, a 16-stroke input bevel gear, a 17-screw input bevel gear, a 18-stroke mating wheel, a 19-driving disk, a 20-driving shaft, a 21-grooved wheel shaft, a 22-grooved wheel, a 23-arc groove, a 24-dial gear shaft, a 25-dial gear, a 26-grooved wheel shaft gear, a 27-dial pointer, a 28-transparent dial cover, a 29-torque control screw, a 30-torque input gear shaft, a 31-torque screw fixed shaft, a 32-switch mounting shaft, a 33-double control switch, a 34-torque microswitch, a 35-torque slider, a 36-upper housing, a 37-switch main body, a 38-switch control disk, a 39-trigger lever, a 40-7-mounting rod, a 41-switch shaft, a 42-hollow bevel gear shaft, a 43-44-bevel gear, a 45-bevel gear, a bevel gear support wedge-46, a bevel gear-52-bevel gear, a wedge-shaped bevel gear, a bevel gear input shaft, a wedge-shaped bevel gear, a 52, a bevel gear input bevel gear-shaped bevel gear, a 54-shaped bevel gear, a bevel gear input shafts, a wedge-shaped bevel gears, a 54, a bevel gears, and a bevel gears, 55-wedge mounting groove, 56-switch pin, 57-limit spring.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
Example 1
At present, the electric head control box basically adopts an Russian switch type electric head control box, the travel control of the electric head control box is completed by adopting a gear transmission and spring compression mode, and the electric head control box is described in the background art, has low control precision and is high in precision, The use in the environment with high sensitivity is very inconvenient, but the traditional Russian switching type electric head control box is used in the industry for many years, based on the limitation of traditional thinking, the industry personnel can hardly make subversion design on the traditional Russian switching type electric head control box, or make design improvement on the basis of the traditional transmission mode, the obtained effect is difficult to reach the expectation, and along with the wide application of the electric head control box in the nuclear power field, the electric head control box is provided with higher requirements, the control precision of the electric head control box cannot meet the requirements of the nuclear power field, and based on the background, the application breaks through the traditional inherent design, develops and meets the requirements of high precision such as nuclear power and the like, The high-sensitivity electric head control box is characterized in that as shown in figures 1 to 8, the high-sensitivity electric head control box based on lead screw control is used for connecting a switching signal of an electric actuator feedback valve and comprises a valve body 1 and a mechanical control box 2 arranged on the valve body 1, a lead screw control component is arranged in the mechanical control box 2, and the lead screw control component comprises a stroke input shaft 3, a main shaft lead screw 4, a stroke switch slide block 5, The switch 6 of the switch Cheng Weidong and the switch-off travel micro switch 7 are arranged at intervals along the axial direction of the spindle screw 4, the installation position of the switch 6 of the switch Cheng Weidong and the installation position of the switch-off travel micro switch 7 can be adjusted along the axial direction of the spindle screw 4, the switch slide block 5 of the switch is used for singly triggering the switch-off travel micro switch 6 or the switch-off travel micro switch 7, the switch of the valve is powered by the electric actuator to be turned on and off, the electric actuator only can provide power output, the switching degree of the valve is fed back by the electric head control box, the feedback signal acts on the electric actuator, the electric actuator is disconnected from power input to the valve according to the feedback signal, so the electric head control box is a control element, the switch signal of the valve is fed back to the electric actuator, the electric actuator can accurately control the opening and closing of the valve, the electric head control box belongs to the prior art, the purpose is to explain the operation scene of the electric head control box, the stroke input shaft 3 provides power input through the electric actuator, the stroke input shaft 3 drives the main shaft screw 4 to rotate, the main shaft screw 4 and the stroke switch slide block 5 form a screw transmission pair, the stroke switch slide block 5 linearly moves along the axial direction of the main shaft screw 4, when the valve is opened, the main shaft screw 4 positively rotates, the stroke switch slide block 5 moves close to the opening Cheng Weidong switch 6, when the stroke switch slide block 5 touches the contact of the opening stroke micro switch 6, the opening stroke is ended, the application relates to a valve control box, which comprises a main shaft lead screw 4, a valve, a main shaft lead screw 4, a travel switch slide block 5, a travel switch micro switch 7, a valve, a lead screw transmission mechanism, a control box and a control box, wherein the main shaft lead screw 4 stops rotating, the valve is opened, the main shaft lead screw 4 reversely rotates after the closing travel of the valve starts, the travel switch slide block 5 is close to the travel switch micro switch 7 and moves, when the travel switch slide block 5 touches a contact point of the travel switch micro switch 7, the travel switch is closed, the main shaft lead screw 4 stops rotating, the valve is completely closed, a switch signal of the valve is fed back in a lead screw transmission mode, the accuracy is higher, the switch state of the valve can be accurately reflected, and the control box can be suitable for scenes of high speed, high sensitivity and rigidity The high reliability has the advantages of meeting the requirement of the nuclear power field, being used in the same high-requirement environment, adjusting the installation positions of the on-line Cheng Weidong switch 6 and the off-line micro switch 7, controlling the time of the travel switch slide block 5 to move to trigger the travel micro switch by adjusting the distance between the on-line Cheng Weidong switch 6 and the off-line micro switch 7, further controlling the execution time of opening and closing the valve, correspondingly adjusting the positions of the on-line Cheng Weidong switch 6 and the off-line micro switch 7 according to the opening and closing range of the valve by adjusting the travel range, enabling the electric head control box to adapt to valves of various types, reducing the types of the control box, having better compatibility, being capable of being adjusted in a large range, saving the consumable cost or purchasing the equipment cost, The defects of poor compatibility of the development cost and the manual management cost are avoided.
Example two
In order to replace the traditional stroke control structure with the whole replacement of the screw control assembly, the invention adopts a modularized design, and is convenient to install and detach as a whole, and particularly, on the basis of the first embodiment, as shown in fig. 1 to 4, the screw control assembly further comprises a left support plate 8, a right support plate 9 and a main shaft screw fixing shaft 10, wherein the left support plate 8 and the right support plate 9 are all installed on a valve body 1 through screws, the main shaft screw 4 is rotatably installed on the left support plate 8 and the right support plate 9, two ends of the main shaft screw fixing shaft 10 are respectively and fixedly connected with the left support plate 8 and the right support plate 9, a stroke switch sliding block 5 is slidably sleeved on the main shaft screw fixing shaft 10, the screw control assembly is integrally installed on the left support plate 8 and the right support plate 9, the screw control assembly can be assembled outside a mechanical control box first, and has enough space to be convenient to install, and then the left support plate 8 and the right support plate 9 are installed in the mechanical control box 2, so that the whole installation is realized, and the subsequent detachment and maintenance are convenient.
Further, as shown in fig. 1 to 4, two groups of sliding rails 11 are fixed between the left supporting plate 8 and the right supporting plate 9, two ends of the sliding rails 11 are respectively connected with the left supporting plate 8 and the right supporting plate 9, sliding rails 12 are slidably matched with the sliding rails 11, the sliding rails 12 are abutted against the sliding rails 11 through screws, the opening Cheng Weidong switch 6 and the closing stroke micro switch 7 are respectively installed on the sliding rails 12 of the two groups of sliding rails 11, scales are arranged on the sliding rails 11, the positions of the opening Cheng Weidong switch 6 and the closing stroke micro switch 7 are conveniently and intuitively reflected, when the positions of the opening Cheng Weidong switch 6 and the closing stroke micro switch 7 need to be adjusted, screws on the sliding rails 12 are correspondingly unscrewed, the sliding rails 12 can move on the corresponding sliding rails 11, the opening Cheng Weidong switch 6 or the closing stroke micro switch 7 can be moved to specified positions according to the scales, finally the screws are screwed, the positions of different types of valves can be adapted through adjusting the intervals between the opening Cheng Weidong switch 6 and the closing stroke micro switch 7, and the positions can be adjusted through screwing.
Further, as shown in fig. 1 to 4, the top of the travel switch slider 5 is connected with a travel control board 13, two sets of travel trigger components are arranged on the travel control board 13, the travel trigger components comprise a connecting rod 14 and rollers 15, one end of the connecting rod 14 is connected with the travel control board 13, the other end of the connecting rod 14 is rotationally connected with the rollers 15, the contact at the top of the switch of Cheng Weidong is located on the moving path of one roller 15, the contact at the top of the switch of Cheng Weidong is located on the moving path of the other roller 15, two sets of sliding rails 11 are arranged up and down at intervals and are arranged in a staggered manner along the radial direction of the spindle screw 4, so that collision between the switch of Cheng Weidong and the switch of Cheng Weidong and the switch of 7 can not occur during movement adjustment, the travel adjustment range is improved, the control of more types of valves can be adapted, the contacts of the switch of Cheng Weidong and the switch of 7 can be respectively corresponded by extending the rollers 15 through the connecting rod 14, and the trigger of the switch of Cheng Weidong and the switch of 7 can be realized in a one-to-one correspondence manner.
Example III
On the basis of the second embodiment, as shown in fig. 1 to 7, a stroke input bevel gear 16 is sleeved on a stroke input shaft 3, a lead screw input bevel gear 17 is sleeved on a main shaft lead screw 4, the lead screw input bevel gear 17 is meshed with the stroke input bevel gear 16, one end of the stroke input shaft 3 is connected with a stroke matching wheel 18 in a penetrating way from the bottom of a valve body 1, the stroke matching wheel 18 is used for being connected with an electric actuator, the electric actuator inputs power to the stroke input shaft 3 through the stroke matching wheel 18, the stroke input shaft 3 drives the main shaft lead screw 4 to rotate through the meshing of the stroke input bevel gear 16 and the lead screw input bevel gear 17, a stroke switch sliding block 5 on the stroke input shaft 3 moves linearly along the axial direction of the main shaft lead screw 4 so as to trigger a contact of a switch Cheng Weidong or a contact of a switch 7 to close the stroke, so as to complete a valve switch signal, wherein the power input part of the stroke input shaft 3 is not changed, and the stroke matching wheel 18 is connected with the electric actuator so that the electric actuator cannot be improved to adapt to the improvement of an electric head control box, and the equipment investment cost is reduced.
Example IV
The conventional Russian switching type electric head control box adopts disc type adjustment in a moment adjusting part, the disc type adjustment controls the moment size in a mode of adjusting an angle, but is inconvenient to control a tiny angle, meanwhile, because the angle change is caused by touching a cam when the control is installed after the adjustment is finished, the precision is poor, and the requirements of high-precision and high-sensitivity environment use are not met, therefore, on the basis of the embodiment III, as shown in fig. 1 to 7, a moment control assembly is further arranged in the mechanical control box 2, the moment control assembly comprises a moment input gear shaft 30, a moment control screw 29 and two symmetrically arranged moment switch assemblies, the moment input gear shaft 30 and the moment control screw 29 are rotationally arranged, the moment input gear shaft 30 is connected with the moment control screw 29 through a gear set in a transmission way, the moment switch assembly comprises a moment micro switch 34 and a moment screw slider 35, the torque screw slider 35 is sleeved on the torque control screw 29 in a threaded manner, the torque screw slider 35 is used for triggering the torque micro switch 34, the torque control assembly further comprises a torque screw fixing shaft 31 and a switch mounting shaft 32 which are fixedly arranged, the torque screw slider 35 is sleeved on the torque screw fixing shaft 31 in a sliding manner, the torque micro switch 34 is sleeved on the switch mounting shaft 32, when a valve is blocked, namely the valve cannot be normally opened or closed, at the moment, an electric actuator cannot normally drive the stroke input shaft 3 to rotate a switch signal of the feedback valve, at the moment, the torque of the electric actuator for driving the operation of the electric head control box is gradually increased, so that the torque input gear shaft 30 rotates, the torque input gear shaft 30 drives the torque control screw 29 to rotate, the torque screw slider 35 makes linear motion along the axial direction of the torque control screw 29, the torque control assembly also adopts a screw transmission mode to carry out torque adjustment, the torque micro switch 34 is triggered by the linear movement of the torque screw slide block 35, the torque control screw 29, the torque screw fixing shaft 31 and the switch mounting shaft 32 have the advantages of high control precision and stable control, and the torque control screw 29, the torque screw fixing shaft 31 and the switch mounting shaft 32 are all mounted on the left support plate 8 and the right support plate 9, so that the torque control assembly is mounted by adopting a modularized design, and the integral mounting and dismounting are realized.
Example five
Because the positions of the opening Cheng Weidong switch 6 and the closing travel micro switch 7 are required to be adjusted in a large range so as to adapt to the control of more different types of valves, the main shaft screw 4 and the sliding rail 11 are designed in the mechanical control box 2in the maximum length, so that the residual space between the two ends of the main shaft screw 4 and the inner wall of the mechanical control box 2 is narrower, and the installation of a gear set cannot be completed; the gear set comprises a torque gear shaft 48, a torque lead screw bevel gear 49 and a bevel gear 50, wherein the torque gear shaft 48 is rotatably arranged in the mechanical control box 2, the torque lead screw bevel gear 49 is sleeved on the torque control lead screw 29, the bevel gear 50 is sleeved on the torque gear shaft 48, the bevel gear 50 is meshed with the torque lead screw bevel gear 49, the torque input gear shaft 30 and the torque gear shaft 48 are respectively sleeved with an input bevel gear 51 and a torque input bevel gear 52, the torque input bevel gear 52 is meshed with the input bevel gear 51, one end of the torque input gear shaft 30 is connected with a torque matching wheel 53 in a penetrating way from the bottom of the valve body 1, the torque input gear shaft 30 is also connected with an electric actuator in a transmission way by adopting the torque matching wheel 53, when a valve is in fault, an opening stroke or a closing stroke is blocked, the electric actuator drives the torque input gear shaft 30 to rotate through the torque matching wheel 53, the torque input gear shaft 30 rotates through the meshed torque gear shaft 48 of the input bevel gear 51 and the torque input bevel gear 52, the torque gear shaft 48 rotates through the meshed torque control screw 29 of the torque screw bevel gear 49 and the bevel gear 50, so that the torque screw slider 35 moves on the torque control screw 29 to trigger the torque micro switch 34, and when a valve is blocked, the torque control assembly can accurately and stably operate to feed back fault information.
Example six
On the basis of the fifth embodiment, as shown in fig. 1 to 4, one end of the spindle screw 4, far away from the stroke input shaft 3, is in transmission connection with the dial gear shaft 24 through a large-scale speed reducing assembly, one end of the dial gear shaft 24, close to the inner wall of the mechanical control box 2, is fixed with a dial pointer 27, the side wall of the mechanical control box 2 is provided with a transparent dial cover 28, the transparent dial cover 28 is marked with scales along the circumferential direction of the self, the transparent dial cover 28 is used for displaying the dial pointer 27, the spindle screw 4 drives the dial gear shaft 24 to rotate while rotating, the dial pointer 27 on the dial gear shaft 24 is driven to deflect, the deflection position of the dial pointer 27 can be seen through the transparent dial cover 28, and the scale on the dial pointer 27 and the scale on the transparent dial cover 28 cooperate to reflect the switch position of the valve, so that the switch position of the valve is visualized, and the opening degree of the valve is convenient to control.
Example seven
Because the rotating speed of the spindle screw 4 is higher, if the spindle screw 4 drives the dial gear shaft 24 to rotate through the gear set, in order to reduce the rotating speed of the dial gear shaft 24, a larger transmission ratio design between gears is needed, and a larger-size gear cannot be installed in the space in the mechanical control box 2, therefore, on the basis of the sixth embodiment, as shown in fig. 1 to 4, the large-proportion speed reducing component comprises a groove wheel shaft 21 which is rotationally arranged, a driving disc 19 sleeved on the spindle screw 4, a driving shaft 20 is eccentrically fixed on the driving disc 19, a grooved pulley 22 is assembled on the groove wheel shaft 21, a plurality of arc grooves 23 are uniformly distributed on the side wall of the grooved pulley 22 along the circumferential direction of the driving disc, a dial gear 25 is sleeved on the dial gear shaft 24, a groove wheel shaft 21 is sleeved with a groove wheel shaft gear 26, the dial gear 26 is meshed with the dial gear 25, and on the basis of the sixth embodiment, the driving disc 4 drives the driving disc 19 to rotate, the driving shaft 20 deflects to the arc grooves 23 to drive the grooved pulley 22 to deflect a certain angle, and after the grooved pulley 22 deflects a certain angle, the driving shaft 20 is separated from the arc grooves 23, the next driving disc 20 moves to the arc grooves 23 to a certain extent, and the number of the driving disc 20 can deflect to the arc grooves 22 to be actually required to be rotatably driven by the arc grooves 22, and the driving disc 22 is required to deflect a small rotating angle to be rotatably and the small-size and the driving disc 22; sheave 22 drives sheave axle 21 to rotate, sheave axle 21 drives dial gear shaft 24 to rotate through the meshing of dial gear 25 and sheave axle gear 26, the rotation speed of the dial gear shaft 24 is reduced through the secondary speed reduction, so that the dial pointer 27 deflects one circle to respond to the stroke range of the valve which is completely closed and completely opened.
Example eight
On the basis of the seventh embodiment, as shown in fig. 1 to 6, the moment switch assembly further comprises a double-control switch 33, when the moment lead screw sliding block 35 triggers the double-control switch 33, the double-control switch 33 triggers the moment micro switch 34, one end of the double-control switch 33, which comprises a switch shell, a triggering rod 39 and a 7-shaped mounting rod 40,7, is fixedly arranged on the switch mounting shaft 32, the triggering rod 39 is vertically arranged and is in sliding connection with the 7-shaped mounting rod 40, the switch shell is sleeved on the triggering rod 39 in a sliding manner, the bottom arc of the triggering rod 39 transits, and is positioned on the moving path of the moment lead screw sliding block 35, when the moment lead screw sliding block 35 triggers the contacts of the switch Cheng Weidong, the travel switch sliding block 5 presses one of the double-control switches 33 to act on the contacts of the corresponding moment micro switch 34, when the travel switch sliding block 5 triggers the contacts of the travel micro switch 7, the travel switch sliding block 5 presses down the other double-control switch 33 to act on the contacts of the moment micro switch 34, so that the moment micro switch 34 acts on the moment micro switch 34, and when the moment lead screw sliding block 35 is pressed down the moment sliding block 35, the moment sliding block is pressed down the moment sliding block 34, and the moment sliding block is pressed down the moment sliding block 35, when the moment sliding block 35 is pressed down the contacts of the moment sliding block 35, the switch shell of the double-control switch is moved upwards to be separated from the moment micro switch 34 so as to enable the moment micro switch 34 to feed back a fault signal, when the valve is closed and blocked, the moment screw slide block 35 is close to the Guan Liju micro switch and moves to press the double-control switch on the path, the moment screw slide block 35 presses the trigger rod 39 to move upwards, the switch shell of the double-control switch is moved upwards to be separated from the moment micro switch 34, so that the moment micro switch 34 feeds back a fault signal, no matter the valve is opened or closed, fault feedback can be carried out, when the valve is normally operated, vibration can be generated due to initial opening or initial closing of the valve, then the valve is stable gradually, in order to avoid the fact that the vibration when the valve is started affects the false alarm of the moment micro switch 34, when the travel switch slide block 5 triggers the opening Cheng Weidong switch 6, the travel switch slide block 5 presses down the switch shell, the switch shell is pressed on the contact of the moment micro switch, the vibration when the switch shell is started can not move upwards to be separated from the contact of the moment micro switch 34, the other switch shell is pressed down when the travel switch slide block 5 triggers the travel switch 7, the situation that the moment micro switch is not enabled to be more stable, and the moment micro switch cannot be controlled to move upwards, and the false alarm situation can not be generated when the contact is triggered.
Example nine
On the basis of the eighth embodiment, the switch housing includes an upper housing 36, Switch main body 37 and switch control board 38, switch main body 37's both ends are connected casing 36 and switch control board 38 respectively, moment micro-gap switch 34's contact is located switch control board 38's travel path, be provided with switch shaft 41 in the switch casing, switch shaft 41 activity passes trigger lever 39 and connects 7 font installation pole 40, the top of trigger lever 39 is fixed with cavity round platform 42, the top of switch shaft 41 is fixed with round platform 43, cavity round platform 42 is located the below of round platform 43, be provided with spring 44 between round platform 43 and the cavity round platform 42, hollow round platform 42 and round platform 43 are connected respectively at both ends of spring 44, the top of round platform 43 is connected with jack-up spring 46, jack-up spring 46 is kept away from the interior roof of casing 36 in one end of round platform 43, the inside wall slip of upper casing 36 is provided with support wedge 47, support wedge 47 has the degree of freedom along horizontal direction removal, the bottom of support wedge 47 is provided with wedge 54, when double control switch 33 acts on the contact of corresponding micro-gap moment switch 34, jack-up spring 46 is in compression state, The supporting wedge block 47 is propped against the bottom of the round table 43, a wedge block mounting groove 55 is formed in the inner side wall of the upper shell 36, a switch pin 56 is fixed in the wedge block mounting groove 55, the supporting wedge block 47 is sleeved on the switch pin 56 in a sliding manner, a limit spring 57 is sleeved on the switch pin 56, and when the supporting wedge block 47 contacts the bottom of the round table 43, the limit spring 57 is in a normal state; under normal operation, the supporting wedge block 47 contacts the bottom of the round table 43, and the wedge surface 54 is positioned on the moving path of the hollow inverted round table 42, because the round table 43 is fixed on the 7-shaped mounting rod 40 through the switch shaft 41, the position of the round table 43 cannot be changed, thereby the round table 43 limits the movement of the supporting wedge block 47, the whole switch shell can not move upwards, the switch control panel 38 can stably press down on the contacts of the moment micro switch 34, the false triggering is prevented, when the valve is blocked in the opening process or the closing process, the moment input gear shaft 30 rotates through the gear set with the power moment control screw 29, the moment screw slide 35 on the moment input gear shaft is close to the moment micro switch or the moment micro switch to move, at the moment, at this moment, the travel switch slide 5 is separated from the double-control switch, the moment screw slide 35 presses the circular arc part of the trigger rod 39 in the double-control switch, the round table 39 drives the hollow inverted round table 42 to move close to the round table 43, the hollow inverted round table 42 presses the wedge surface 54 of the supporting the wedge block 47, the wedge surface 54 presses the limit spring 57 away from the round table 43, the supporting wedge block 47 moves to the wedge block mounting groove 55 and separates from the whole switch shell from the contact of the wedge block, the whole switch shell is separated from the upper surface 55, the whole switch shell is separated from the upper side of the contact of the spring 46, the fault switch is released, the moment is released from the upper side of the contact of the switch is released, and the moment has the fault moment effect, and the fault moment on the whole switch is released, after the fault is removed, the moment screw slide block 35 is reset, the trigger rod 39 is reset under the reaction force of the spring 44, meanwhile, the travel switch slide block 5 can normally move to feed back valve switch signals, the upper shell 36 of the double-control switch is extruded in the resetting process of the travel switch slide block 5, the top of the upper shell 36 is arc-shaped, the travel switch slide block 5 can extrude the whole switch shell to move downwards, the switch shell carries the supporting wedge block 47 to move downwards to reset, the switch control disc 38 presses the contacts of the moment micro switch 34 again, meanwhile, the supporting wedge block 47 moves to the lower part of the round table 43 again, the supporting wedge block 47 is in reset contact with the bottom of the round table 43 under the reaction force of the limit spring 57 to limit the movement of the switch shell, and therefore the whole travel part and the moment part are reset to normally work.
Further, the side wall of the trigger rod 39 is provided with a sliding groove 45 in a penetrating manner, the sliding groove 45 extends along the axial direction of the trigger rod 39, the 7-shaped mounting rod 40 slides through one end of the sliding groove 45,7-shaped mounting rod 40 to form a mounting hole, the switch mounting shaft 32 is fixedly arranged in the mounting hole in a penetrating manner, and the trigger rod 39 can slide on the 7-shaped mounting rod 40 stably through the matching of the sliding groove 45 and the 7-shaped mounting rod 40, so that torque control is completed.
Claims (11)
1. The utility model provides a high accuracy electric head control box based on lead screw control for connect the switching signal of electric actuator feedback valve, its characterized in that includes valve body (1) and installs mechanical control box (2) on valve body (1), be provided with lead screw control assembly in mechanical control box (2), lead screw control assembly includes travel input shaft (3), main shaft lead screw (4), travel switch slider (5), switch on Cheng Weidong (6) and close travel micro-gap switch (7), travel input shaft (3) rotate and connect valve body (1), one end of travel input shaft (3) is used for connecting electric actuator's power input, and the other end transmission is connected main shaft lead screw (4), the last thread bush of main shaft lead screw (4) is equipped with travel switch slider (5), switch on Cheng Weidong switch (6) and close travel micro-gap switch (7) are followed the axial interval setting of main shaft lead screw (4), and switch on Cheng Weidong switch (6) mounted position and close micro-gap switch (7) all can be followed main shaft (4) axial adjustment slider (5) on the trip micro-gap switch (7);
The mechanical control box (2) is internally provided with a torque control assembly, the torque control assembly comprises a torque input gear shaft (30), a torque control screw (29) and two groups of symmetrically arranged torque switch assemblies, the torque input gear shaft (30) and the torque control screw (29) are both rotationally arranged, the torque input gear shaft (30) is connected with the torque control screw (29) through a gear group in a transmission manner, the torque switch assembly comprises a torque micro switch (34) and a torque screw slider (35), the torque screw slider (35) is in threaded sleeve connection with the torque control screw (29), and the torque screw slider (35) is used for triggering the torque micro switch (34);
The torque control assembly further comprises a torque screw fixing shaft (31) and a switch mounting shaft (32) which are fixedly arranged, the torque screw slider (35) is sleeved on the torque screw fixing shaft (31) in a sliding mode, and the torque micro switch (34) is sleeved on the switch mounting shaft (32);
the moment switch assembly further comprises a double-control switch (33), the double-control switch (33) comprises a switch shell, a trigger rod (39) and a 7-shaped mounting rod (40), one end of the 7-shaped mounting rod (40) is fixedly mounted on the switch mounting shaft (32), the trigger rod (39) is vertically arranged and is connected with the 7-shaped mounting rod (40) in a sliding mode, the switch shell is sleeved on the trigger rod (39) in a sliding mode, the bottom of the trigger rod (39) is in arc transition and is located on the moving path of the moment lead screw slider (35), and a contact of the moment micro switch (34) is located on the moving path of the switch shell;
When the travel switch sliding block (5) triggers the contact of the switch (6) of the switch-on Cheng Weidong, the travel switch sliding block (5) presses down one of the double-control switches (33) to enable the double-control switch (33) to act on the contact of the corresponding moment micro switch (34);
when the travel switch sliding block (5) triggers the contact of the travel switch (7), the travel switch sliding block (5) presses down the other double-control switch (33) to enable the double-control switch (33) to act on the contact of the corresponding moment micro switch (34).
2. The high-precision electric head control box based on screw control according to claim 1, wherein the screw control assembly further comprises a left support plate (8), a right support plate (9) and a main shaft screw fixing shaft (10), the left support plate (8) and the right support plate (9) are mounted on the valve body (1) through screws, the main shaft screw (4) is rotatably mounted on the left support plate (8) and the right support plate (9), two ends of the main shaft screw fixing shaft (10) are fixedly connected with the left support plate (8) and the right support plate (9) respectively, and the travel switch sliding block (5) is slidably sleeved on the main shaft screw fixing shaft (10).
3. The high-precision electric head control box based on screw control according to claim 2, wherein two groups of sliding rails (11) are fixed between the left supporting plate (8) and the right supporting plate (9), sliding rail sliding blocks (12) are slidably matched on the sliding rails (11), the sliding rail sliding blocks (12) are abutted to the sliding rails (11) through screws, and the opening Cheng Weidong switch (6) and the closing stroke micro switch (7) are respectively arranged on the sliding rail sliding blocks (12) of the two groups of sliding rails (11).
4. A high-precision electric head control box based on screw control according to claim 3, characterized in that the top of the travel switch slide block (5) is connected with a travel control board (13), two groups of travel trigger components are arranged on the travel control board (13), the travel trigger components comprise a connecting rod (14) and a roller (15), one end of the connecting rod (14) is connected with the travel control board (13), the other end of the connecting rod is rotationally connected with the roller (15), a contact point at the top of the switch Cheng Weidong is positioned on the moving path of one roller (15), and a contact point at the top of the switch micro-switch (7) is positioned on the moving path of the other roller (15).
5. The high-precision electric head control box based on lead screw control according to claim 1, wherein a stroke input bevel gear (16) is sleeved on the stroke input shaft (3), a lead screw input bevel gear (17) is sleeved on the main shaft lead screw (4), the lead screw input bevel gear (17) is meshed with the stroke input bevel gear (16), and one end of the stroke input shaft (3) penetrates out of the bottom of the valve body (1) to be connected with a stroke matching wheel (18).
6. The high-precision electric head control box based on lead screw control according to claim 1, wherein one end of the main shaft lead screw (4) far away from the stroke input shaft (3) is in transmission connection with a dial gear shaft (24) through a large-scale speed reducing component, one end of the dial gear shaft (24) close to the inner wall of the mechanical control box (2) is fixed with a dial pointer (27), the side wall of the mechanical control box (2) is provided with a transparent dial cover (28), the transparent dial cover (28) is marked with scales along the circumferential direction of the transparent dial cover (28), and the transparent dial cover (28) is used for displaying the dial pointer (27).
7. The high-precision electric head control box based on lead screw control of claim 6, wherein the large-scale speed reducing assembly comprises a grooved wheel shaft (21) which is rotatably arranged and a driving disc (19) which is sleeved on the main shaft lead screw (4), a driving shaft (20) is eccentrically fixed on the driving disc (19), grooved wheels (22) are assembled on the grooved wheel shaft (21), a plurality of arc grooves (23) are uniformly distributed on the side walls of the grooved wheels (22) along the circumferential direction of the grooved wheels, the driving shaft (20) is used for acting in the arc grooves (23) to drive the grooved wheels (22) to deflect, a dial gear (25) is sleeved on a dial gear shaft (24), a grooved wheel shaft gear (26) is sleeved on the grooved wheel shaft (21), and the grooved wheel shaft gear (26) is meshed with the dial gear (25).
8. The high-precision electric head control box based on screw control according to claim 1, characterized in that the switch shell comprises an upper shell (36), a switch main body (37) and a switch control disc (38), wherein two ends of the switch main body (37) are respectively connected with the upper shell (36) and the switch control disc (38), a contact of the moment micro switch (34) is positioned on a moving path of the switch control disc (38), a switch shaft (41) is arranged in the switch shell, the switch shaft (41) movably penetrates through the trigger rod (39) to be connected with the 7-shaped mounting rod (40), a hollow inverted circular table (42) is fixed at the top of the trigger rod (39), a circular table (43) is fixed at the top of the switch shaft (41), the hollow inverted circular table (42) is positioned below the circular table (43), a spring (44) is arranged between the circular table (43) and the hollow inverted circular table (42), two ends of the spring (44) are respectively connected with the hollow inverted circular table (42) and the circular table (43), a wedge-shaped top wall (46) is connected with the top wall (46) of the circular table, the top wall (46) is connected with the top wall (46), the support wedge block (47) has the degree of freedom of moving along the horizontal direction, the bottom of support wedge block (47) is provided with wedge face (54), when double control switch (33) are acted on the contact of corresponding moment micro-gap switch (34), jack-up spring (46) are in compression state, and support wedge block (47) support in the bottom of round platform (43).
9. The high-precision electric head control box based on screw control according to claim 8, wherein a wedge block mounting groove (55) is formed in the inner side wall of the upper shell (36), a switch pin (56) is fixed in the wedge block mounting groove (55), the switch pin (56) is slidably sleeved with the support wedge block (47), a limit spring (57) is sleeved on the switch pin (56), and when the support wedge block (47) contacts the bottom of the round table (43), the limit spring (57) is in a normal state.
10. The high-precision electric head control box based on lead screw control according to claim 8, characterized in that a chute (45) is formed in the side wall of the trigger rod (39) in a penetrating manner, the chute (45) extends along the axial direction of the trigger rod (39), the 7-shaped mounting rod (40) slides through the chute (45), a mounting hole is formed in one end of the 7-shaped mounting rod (40), and the switch mounting shaft (32) is fixedly arranged in the mounting hole in a penetrating manner.
11. The high-precision electric head control box based on screw control according to claim 1, characterized in that the gear set is arranged on one side of the torque control screw (29), the gear set comprises a torque gear shaft (48), a torque screw bevel gear (49) and a bevel gear (50), the torque gear shaft (48) is rotatably arranged in the mechanical control box (2), the torque screw bevel gear (49) is sleeved on the torque control screw (29), the bevel gear (50) is sleeved on the torque gear shaft (48), the bevel gear (50) is meshed with the torque screw bevel gear (49), an input bevel gear (51) and a torque input bevel gear (52) are respectively sleeved on the torque input gear shaft (30) and the torque gear shaft (48), the torque input bevel gear (52) is meshed with the input bevel gear (51), and one end of the torque input gear shaft (30) is connected with a torque matching wheel (53) in a penetrating manner from the bottom of the valve body (1).
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| CN205298753U (en) * | 2015-12-29 | 2016-06-08 | 浙江盾安自控科技有限公司 | Electrical control valve executor subassembly |
| CN220600523U (en) * | 2023-08-31 | 2024-03-15 | 上海精欧工业阀门有限公司 | Four-way ball valve |
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| US7192004B2 (en) * | 2005-06-07 | 2007-03-20 | Shui-Ching Chen | Electric driving device for a valve |
| DE102008008978B3 (en) * | 2008-02-13 | 2009-03-19 | Thomas Magnete Gmbh | Drive device for control slide of 4/3-way valve, has rotor movable with control slide in axial direction, and spring moving rotor and control slide to safe identified position and safe identified condition of hydraulic valve |
| CN102889411B (en) * | 2012-10-08 | 2017-05-31 | 天津市雄华电子仪表有限公司 | Electric actuator moment control mechanism |
| CN205298752U (en) * | 2015-12-29 | 2016-06-08 | 浙江盾安自控科技有限公司 | Electrical control valve executor subassembly fine setting structure |
| CN206093160U (en) * | 2016-10-24 | 2017-04-12 | 特福隆（上海）科技有限公司 | Trigger formula electric valve executor multiple spot stroke controller |
| KR102196416B1 (en) * | 2019-12-30 | 2020-12-30 | (주)에너토크 | Actuator for valve opening and closing |
| CN216975967U (en) * | 2022-04-15 | 2022-07-15 | 扬州电力设备修造厂有限公司 | Torque control mechanism of straight stroke electric device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205298753U (en) * | 2015-12-29 | 2016-06-08 | 浙江盾安自控科技有限公司 | Electrical control valve executor subassembly |
| CN220600523U (en) * | 2023-08-31 | 2024-03-15 | 上海精欧工业阀门有限公司 | Four-way ball valve |
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