CN1360669A - fluid control pipe cleaning valve - Google Patents

Abstract

The invention discloses a fluid control pigging valve, which comprises a main valve (1) and a control device. The main valve comprises a valve body (2) communicated with the fluid pipe (3), a main valve core movably arranged in the inner cavity of the valve body and a main valve rod (5) connected with the main valve core. The control device includes a hydraulic cylinder (6), which includes a piston (7) arranged in the cylinder body and a piston rod (8) connected to the piston, and the piston rod is in drive connection with the main valve rod (5). The main spool is driven by the main valve rod to move the main spool; a valve device including a pass valve (11, 56), the pass valve is arranged on the pipeline connecting the fluid pipe and the hydraulic cylinder; and a controller, It is used to control the action of the passage valve so that the reciprocating movement of the piston can be controlled by the pressure fluid in the fluid pipe (3).

Description

Fluid Control Pigging Valve

Technical field

The invention relates to a fluid control valve, in particular to a fluid control pigging valve capable of passing through a fluid pipe cleaner. Background technique

Pipelines conveying fluids, especially those with medium deposits and corroded peelings on the pipe wall, need to be cleaned by passing a pig in the pipeline to restore the conveying performance of the pipeline. Since the pig must cooperate well with the pipe hole, usually, the pig can only be operated and cleaned in the pipeline section provided with fluid control valves and equipment that can pass through the pig, which makes the pigging project difficult and time-consuming Long, manpower and high cost. There are fluid control valves that can control the fluid and pass through the pig, such as the gate valve that can pass through the pig, and a through hole that matches the pipe hole is opened on the flat disc. The blind plate part of the disc completes the gate valve function, and the through hole part of the valve disc completes the pig passing function. This structure only solves the pig passage problem of the gate valve, but fails to solve the pig passage problem of other valves - and the valve control during pigging is mostly manual control or external hydraulic control, so there is a control Inconvenient, must use the problem of external force energy. technical solution

In view of this, the object of the present invention is to provide a fluid control pigging valve that can pass through a fluid pipe cleaner, and its working state is controlled by the controlled fluid.

To achieve the above object, the present invention provides a fluid control pigging valve, including a main valve and a control device. The main valve includes a valve body communicated with the fluid pipe, a main valve core movably arranged in the inner cavity of the valve body, and a main valve rod connected with the main valve core. The control device includes: a hydraulic cylinder, which includes a piston disposed in the cylinder and a piston rod connected to the piston, the piston rod is in transmission connection with the main valve rod, and is used to drive the main valve core through the main valve rod to make the main valve core movement; a valve device including a pass valve, the pass valve is arranged on the pipeline connecting the fluid pipe and the hydraulic cylinder; and a controller is used to control the movement of the pass valve so as to use the pressure fluid in the fluid pipe to control the reciprocating movement of the piston.

The main valve of the present invention can be a self-operated valve, such as a shuttle valve with adjustable differential flow, a check valve, a shuttle check replacement page (Article 26 of the detailed rules) valve, shuttle type pipeline blasting protection valve; it can also be an external force valve, such as ball valve, control valve, shuttle control valve, globe valve, shuttle type globe valve.

The fluid control pigging valve of the present invention has the following advantages and effects.

1. The hydraulic cylinder structure connected with the main valve drive of the present invention and the passage valve structure matched with the fluid pipe can send the pressure fluid in the fluid pipe into and out of the hydraulic cylinder, and use the kinetic energy of the fluid itself to drive the hydraulic cylinder The main valve moves through the valve stem, and the main valve is opened to make the flow path of the main valve coincide with the fluid pipe, so that the pig can pass through the main valve smoothly.

2. The through valve of the present invention has a controller with an electromagnetic switch and its electric controller, a controller with an electromagnetic switch, a sensor and its electric controller, a controller with a hydraulic holding cylinder and a reset valve, and a control with a lever The structure of the pig can make use of the operation of the pig to delay the passing state of the main valve until the pig passes through and return to the normal operation state, thus having the advantage of ensuring the smooth passage of the pig through the main valve. Among them, the controller structure with hydraulic holding cylinder and reset valve is especially suitable for unattended occasions without power such as electricity; the controller structure with electromagnetic switches, sensors, and electric controllers is especially suitable for situations with Occasions where people are on duty; The controller structure with levers is especially suitable for occasions where there is no power such as electricity and no one is on duty;

3. The passage valve of the present invention has a controller structure with an electromagnetic switch and an electric controller, which can control the main valve through the electric controller, the passage valve, and the hydraulic cylinder. It not only has the ability to control the opening of the main valve to the pig passage state, It has the advantages of delaying the maintenance state and restoring the normal operation state, and has the advantage of manipulating the main valve to control the fluid. It is especially suitable for occasions where there is no power such as electricity and unattended.

4. The two-way regulating valve structure of the present invention can regulate the flow rate of the fluid sent into and discharged from the hydraulic cylinder, thus having the advantage of adjusting the operating speed of the main valve.

5. The main valve of the present invention has the advantage of being made into various valve structures. The main valve can be a reciprocating structure in which the main valve pestle and the piston rod of the hydraulic cylinder are coaxially connected; the main valve stem can be rotatable The ground is connected with the main spool, and is perpendicular to the piston rod of the hydraulic cylinder in a compound motion structure of rack and pinion transmission connection rotation and reciprocation; it can also be a reciprocating structure of the spool; it can also be a spool It is a rotating structure. Brief description of the drawings

The present invention will be described in further detail below in conjunction with accompanying drawing and embodiment " wherein

Fig. 1 is a schematic structural diagram of a fluid control pigging valve according to a first embodiment of the present invention, wherein the main valve is in a normal working state for controlling fluid. Replacement Page (Article 26 of the Regulations) Fig. 2 is a schematic structural view of the fluid control pigging valve according to the first embodiment of the present invention, wherein the main valve is in a state allowing the pig to pass through.

Fig. 3 is a schematic structural view of a fluid control pigging valve according to a third embodiment of the present invention.

Fig. 4 is a structural schematic diagram of a fluid control pigging valve according to a third embodiment of the present invention, wherein the main valve is in a normal working state for controlling fluid.

Fig. 5 is a schematic structural diagram of a fluid control pigging valve according to a third embodiment of the present invention, wherein the main valve is in a state allowing the pig to pass through.

Figure 6 is a partial view with the reset valve pushed to its upper position by the pig.

FIG. T is a schematic structural view of a fluid control pigging valve according to a fourth embodiment of the present invention.

Fig. 8 is a structural schematic diagram of a fluid control pigging valve according to a fifth embodiment of the present invention, wherein the main valve is in a normal working state for controlling fluid.

Fig. 9 is a structural schematic diagram of a fluid control pigging valve according to a fifth embodiment of the present invention, wherein the main valve is in a state allowing the pig to pass through.

Fig. 10 is a schematic structural view of a fluid control pigging valve according to a sixth embodiment of the present invention.

Fig. 11 is a structural schematic diagram of a fluid control pigging valve according to a seventh embodiment of the present invention, wherein the main valve is in a normal working state for controlling fluid.

Fig. 12 is a schematic structural diagram of a fluid control pigging valve according to a seventh embodiment of the present invention, wherein the main valve is in a state allowing the pig to pass through.

Fig. 13 is a schematic structural view of a fluid control pigging valve according to an eighth embodiment of the present invention. Detailed Description of the Preferred Embodiment

Example 1

1 and 2 show a first embodiment of the fluid control pigging valve of the present invention. As shown in Figures 1 and 2, the fluid control pigging valve of this embodiment is composed of a main valve 1 and a control device, and the control device is composed of a hydraulic cylinder 6, a communication valve 11 and a controller.

The main valve 1 includes a wide body 2 with a common cavity shape, and is connected to a fluid pipe 3 with a common structure. There is formed in the main valve a flow channel that can coincide with the flow channel of the fluid pipe and allow the pig 19 to pass through, that is, the cross-sectional shape and size of the two flow channels are basically the same. There is a valve cover 4 on the upper end of the valve body 2, and the valve body and the valve cover can be integrated as shown in the figure, or they can be independent components connected to each other through flanges. The main valve pestle 5 of the main valve and the main valve core (not shown in the figure) can adopt a common fixed connection structure, or a common rotary connection structure. The main valve core of the main valve reciprocates in the valve body 2, Due to replacement pages (Article 26 of the Regulations) This main valve can be made into gate valve, gate valve, plunger valve.

The hydraulic cylinder 6 adopts a traditional hydraulic cylinder, which is integrated with the main valve 1. The piston 7 reciprocates in the hydraulic cylinder and is fixedly connected with the piston rod 8. Above the piston 7 is an upper chamber 9, and below the piston is a lower chamber 10. The main valve rod 5 of the main valve 1 extends through the valve cover 4 and is coaxially connected with the piston rod 8 as a whole.

The through valve 11 is a common two-position multi-way piston valve, which can be installed on the fluid pipe 3 on the upstream side of the main valve with a bracket. The casing 12 of the passage valve is formed with an upper cavity interface 13, a lower cavity interface 14, a fluid pipe interface 15 and an atmosphere interface 16. The passage valve core 17 in the casing is fixedly connected with the passage valve stem 18, and the lower end of the passage valve stem extends into the fluid pipe 3 to an appropriate depth, and is set in such a way that the traveling pig 19 can push the passage valve stem upwards to pass the valve core , The upper end of the passage valve rod 18 protrudes from the valve casing and is connected with a suction cup 30 . A sealing structure should be provided between the passage valve stem and the fluid pipe. The passage spool 17 is formed with a passage 20 that can connect the lower chamber interface 14 and the fluid pipe interface 15 when it is located on the upper part of the housing, and a pressure relief passage 21 that connects the upper chamber interface 13 and the atmospheric interface 16; 17 is also formed with a reset channel 22 that can connect the upper cavity interface 13 and the fluid pipe interface 15 when it is located at the lower part of the housing, and a pressure relief channel 23 that connects the lower cavity interface 14 and the atmospheric interface 16. The upper cavity interface 13 is connected with the upper cavity 9 of the hydraulic cylinder 6 with the pipeline 24, and the lower cavity interface 14 is connected with the lower cavity 10 of the hydraulic cylinder with the pipeline 25. The fluid pipe interface 15 is connected to the fluid pipe 3 through the pipeline, and the atmospheric interface 16 can be connected to the atmosphere through the pipeline or a storage tank 26 is arranged under the pipeline. Two-way regulating valves 27 and 28 are respectively installed on the pipelines 24 and 25. The two-way regulating valve can choose the differential flow adjustable shuttle valve of the inventor (please refer to the patent No. 87103004.7 authorized to the inventor in 1987), which is used to adjust the flow of forward and reverse fluid in the pipeline . The structure of the through valve can also adopt a two-position multi-way valve with a spool that rotates. When this structure is used, a corresponding spool drive mechanism should be used.

Controller is made up of electromagnetic switch 29, sensor 31 and electric controller 32 etc. The electromagnetic switch 29 can be an electromagnetic switch with a common structure, which can attract and release the suction cup 30 connected to the upper end of the passage valve stem 18 under the control of the electric controller. The electromagnetic switch can be made to share a housing with the passage valve. structure. The sensor ³¹ is an inductive sensor with a common structure that can cooperate with the pig 19, and the sensor is installed on the fluid pipe 3 on the downstream side of the main valve. Electric controller 32 selects common electric controller for use, is installed in the place that is easy to handle, and is electrically connected with electromagnetic switch 29 and sensor 31 with lead 33 and lead 34 respectively.

When the fluid control pigging valve of this embodiment is set in a normal working state such as controlling the fluid, the passage valve stem 18 of the passage valve 11 extends into the fluid pipe 3, as shown in FIG. 1 . The passage spool 17 is located at the lower part of the casing, the passage 20 and the pressure relief passage 21 in the passage spool are cut off at the same time, the reset passage 22 connects the upper cavity interface 13 with the fluid pipe interface 15, and the pressure relief passage 23 will be lowered. Cavity Interface 14 and Atmospheric Replacement Sheet (Rule 26) Interface 16 is switched on. The pressure fluid in the fluid pipe 3 enters the upper chamber 9 of the hydraulic cylinder 6 through the fluid pipe interface 15 of the passage valve 11, the reset channel 22, the upper chamber interface 13, the pipeline 24 and the two-way regulating valve 27 therein, so that the upper chamber of the hydraulic cylinder The fluid pressure in the cavity is slightly equal to the fluid pressure in the fluid pipe 3; the lower cavity 10 of the hydraulic cylinder is connected to the outside atmosphere through the pipeline 25, the lower cavity interface 14 of the passage valve 11, the pressure relief channel 23, and the atmospheric interface 16, so that the hydraulic pressure The pressure in the cylinder lower chamber 10 is atmospheric pressure, that is, the pressure in the upper chamber of the hydraulic cylinder is greater than the pressure in the lower chamber. Under the action of fluid pressure, the piston 7 in the hydraulic cylinder 6 is pushed to the lower part of the hydraulic cylinder, and the main valve core is pushed to the lower position through the piston pestle 8 and the main rod 5, so that the device is in a normal working state.

When cleaning the fluid pipe 3 with the pig 19, as shown in FIG. The spool 17 rises to the upper part of the housing. At this time, the suction cup 30 is connected to the electromagnetic switch 29 and the electromagnetic switch is energized to attract the suction cup, so that the reset passage 22 and the pressure relief passage 23 in the passage valve core 17 are cut off at the same time, and the passage passage 20 connects the lower cavity interface 14 with the fluid. The pipe interface 15 is connected, and the pressure relief channel 21 connects the upper cavity interface 13 with the atmospheric interface 16 at the same time. The pressure fluid in the fluid pipe 3 enters the lower chamber 10 of the hydraulic cylinder 6 through the fluid pipe interface 15 of the passage valve 11, the passageway 20, the lower chamber interface 14, the pipeline 25 and the two-way regulating valve 28 therein, so that the lower chamber The fluid pressure of the hydraulic cylinder 6 is approximately the same as the fluid pressure in the fluid pipe 3; the upper chamber 9 of the hydraulic cylinder 6 is connected to the outside atmosphere through the pipeline 24, the upper chamber interface 13 of the passage valve 11, the pressure relief channel 21 and the atmospheric interface 16, so that the hydraulic pressure The pressure in the upper chamber 9 of the cylinder is atmospheric pressure, that is, the pressure in the lower chamber of the hydraulic cylinder is greater than the pressure in the upper chamber. Under the action of the electromagnetic switch 29, the passage spool 17 of the passage valve 11 is kept at the rising position, so that the flow passage from the fluid pipe 3 to the lower chamber 10 of the hydraulic cylinder 6 is in a passage state, and the pressure fluid in the fluid pipe 3 continuously enters the hydraulic pressure. The lower chamber of the cylinder, so that the piston 7 is pushed up and placed on the upper part of the hydraulic cylinder. The main valve core is lifted through the main wide rod 5 and the piston rod 8 of the main valve, and the main valve 1 is in a fully open state, so that the flow channel of the main valve coincides with the flow channel of the fluid pipe, so that the moving pig 19 can pass through smoothly , at this time the valve is in the pig pass state.

When the pig 19 travels to the sensor 31 at the downstream side of the main valve 1, the sensor sends the signal that the pig has passed the main valve to the electric controller 32 through the wire 33, and the electric controller receives the signal sent by the sensor 31. After the pig has passed the signal of the main valve, the solenoid switch is manipulated to de-energize to release the suction cup 30 so as to allow the spool 17 to pass through. The passage valve core descends and resets under the action of gravity or another biasing device, and the pressure fluid in the fluid pipe 3 re-enters the upper chamber 9 of the hydraulic cylinder 6 through the passage valve U; at the same time, the fluid in the lower chamber 10 of the hydraulic cylinder also passes through The passage valve is discharged into the atmosphere or the accumulator 26, the piston 7 descends and resets, and the valve returns to the normal working state. Replacement pages (Rule 26) When the valve is in its normal working state of controlling the fluid, the passageway 11 can be controlled by the electric controller 32 through the electromagnetic switch 29, so that it can connect the fluid pipe 3 or the external atmosphere with the upper chamber 9 or the upper chamber of the hydraulic cylinder 6 as required. The lower chamber 10 is connected to control the lifting of the piston 7 in the hydraulic cylinder, and then the opening, closing and opening of the main valve are controlled through the piston rod 8 and the main valve rod 5, so as to realize the control of the fluid. Example 2

Figure 3 shows a second embodiment of the fluid control pigging valve of the present invention. As shown in Figure 3, its overall structure is basically the same as that of Embodiment 1, with the difference that: the passage valve 11 is not equipped with a passage valve stem 18 that can extend into the fluid pipe, and is not equipped with a sensor 31 fitted on the fluid pipe And the wire 33 connected thereto.

The fluid control pigging valve of the second embodiment uses an electric controller to control the operation of the pass valve, and then controls the piston 7 in the hydraulic cylinder to lift the main valve core of the main valve 1, thereby realizing the main valve’s fluid control function and pigging The traffic function of the device. The fluid control pigging valve of this embodiment has the advantage of simple structure. Example 3

4, 5 and 6 show a third embodiment of the fluid control pigging valve of the present invention. As shown in Figures 4, 5, and 6, the main valve 1 of the fluid control pigging valve, the hydraulic cylinder 6 and the passage valve 11 of the control device are the same as those in Embodiment 1, and the controller of the control device is reset by the hydraulic holding cylinder 35, The valve 41 etc. are comprised.

The hydraulic holding cylinder 35 is a common piston hydraulic cylinder, which can be stacked on the top of the passage valve 11 and integrated with the passage valve, and the two are separated by a partition 36. The hydraulic holding cylinder and the passage valve can also be separate structures. A back-moving spring 38 is arranged in the cylinder cavity above the retaining piston 37 of the hydraulic retaining cylinder. The piston rod 39 holding the piston extends through the partition 36 and is connected with the spool 17 of the passage valve, and a sealing structure is provided between the piston pestle and the partition.

The reset valve 41 is a common two-position three-way piston valve, which can be installed on the fluid pipe 3 on the downstream side of the main valve 1 with a bracket. A reset valve core 42 is arranged in the reset valve, and the lower end of the reset valve rod 43 connected with the reset valve core 42 extends into the fluid pipe 3 to an appropriate depth, and is set in such a way that the moving pig 19 can push the reset valve rod upwards so that Reset the spool. A sealing structure is provided between the reset valve stem and the fluid pipe: an air port 45 communicating with the valve cavity is provided at the lower part of the reset valve housing 44, an inlet 46 communicating with the valve cavity is provided at the upper part, and a An outlet 47 communicating with the valve chamber. The inlet ⁴⁶ is communicated with the lower chamber 10 of the hydraulic cylinder 6 with the pipeline 48, and the inlet 46 can also be directly communicated with the lower chamber interface 14 of the passage valve 11 with the pipeline 48. Outlet 47 communicates with the cylinder cavity below the maintenance piston of hydraulic maintenance cylinder 35 with pipeline 49. A return spring 50 is arranged in the valve chamber above the return spool 42 of the return valve. A storage tank 51 can be established below the air port 45 .

When the fluid control pigging valve of the third embodiment is in the normal working state shown in FIG. 4, the working states of the passage valve 11, the hydraulic cylinder 6, and the main valve 1 are the same as those of the first embodiment. At this time, the reset valve core 42 in the reset valve 41 is located at the lower part of the housing 44 under the action of the spring 50, and the reset valve stem 43 extends into the fluid pipe 3. The hydraulic holding cylinder 35 communicates with the lower cavity 10 of the hydraulic cylinder 6 through the pipeline 49, the outlet 47 of the reset valve, the valve cavity above the reset valve core, the inlet 46, and the pipeline 48, and then through the pipeline 25 and the two-way regulating valve 28 therein , the lower cavity interface 14 of the passage valve 11, the pressure relief channel 23 and the atmospheric interface 16 communicate with the atmosphere, and the holding piston 37 in the hydraulic holding cylinder 35 is located at the lower part of the hydraulic holding cylinder under the action of the spring 38, and is held by the holding piston. Piston pestle 39 keeps the passage spool 17 of passage valve 11 on the lower part of the valve body. Under the action of fluid pressure, the piston 7 in the hydraulic cylinder 6 is located at the lower part of the hydraulic cylinder, and at the same time, the main valve core is pushed to the lower working position to realize the normal control of the fluid.

When using a pig to clean the fluid pipe, when the pig 19 travels to the passage valve 11, as shown in Figure 5, the passage valve 11, the hydraulic cylinder 6, and the main valve 1 are the same operate in the same manner as described above. At this time, the reset valve stem 43 of the reset valve 41 is still extending into the fluid pipe 3, and the reset valve core 42 is still located at the lower part of the casing. 46. The valve cavity above the reset spool, the outlet 47, and the pipeline 49 enter the cylinder cavity below the holding piston 37 of the hydraulic holding cylinder 35, so that the holding piston and the passing spool 17 of the passing valve 11 are kept at the rising position, so as to Keep the flow channel from the fluid pipe 3 to the lower chamber 10 of the hydraulic cylinder 6 in a state of passage, so that the pressure fluid of the fluid pipe 3 continuously enters the lower chamber of the hydraulic cylinder to push the piston 7 up to the upper part of the hydraulic cylinder, and at the same time, the main valve core is pushed to the upper part of the hydraulic cylinder. Lift up to make the pig flow path of the main valve coincide with the flow path of the fluid pipe, so that the moving pig can pass through smoothly. At this time, the valve is in the pig passing state.

When the pig 19 travels to the reset valve 41, as shown in Figure 6, the pig 19 pushes up the reset valve stem 43 of the reset valve 41 to overcome the elastic force of the spring 50 to make the reset valve core 42 move up to the upper part of the housing 44 . The inlet 46 on the casing is blocked by the reset spool 42, and the outlet 47 communicates with the air port 45 through the valve chamber below the reset spool. The fluid in the cylinder chamber below the retaining piston 37 in the hydraulic holding cylinder 35 is discharged from the air port 45 through the pipeline 49, the outlet 47 of the reset valve and the valve chamber or into the reservoir 51 below the air port. The hydraulic holding cylinder releases pressure, and the holding piston 37 resets under the action of the spring 38, and pushes down the piston rod 39 together with the passing spool 17 of the passing valve 11 to make it reset. Correspondingly, the hydraulic cylinder 6 and the main valve 1 It can also be reset, and the valve returns to normal working condition.

In addition, the controller of the fluid control pigging valve in this embodiment can also be configured as in Embodiment 1 Replacement page (Article 26 of the detailed rules) An electromagnetic switch 29 and an electric controller 32; correspondingly, the sucker 30 cooperating with the electromagnetic switch 29 is connected with the holding piston 37 through the connecting rod 40. Therefore, the main valve 1 can be controlled to enter and exit the pig passing state by manipulating the controller, as shown in Figures 4 and 5. Example 4

The fluid control pigging valve of the fourth embodiment of the present invention is shown in FIG. 7, and its overall structure is basically the same as that of Embodiment 3, the difference is that:

The hydraulic cylinder 6 is horizontally fixed on the valve body 2 of the main valve 1 with a bracket, the piston rod 8 is perpendicular to the main valve rod 5, and a rack 52 is made on the protruding end of the hydraulic cylinder piston rod 8.

The main valve rod 5 of the main valve 1 is fixed with a gear 53 meshing with the rack 52 of the piston pestle 8, so that the main valve pestle rotates with the reciprocating motion of the piston rod. The main valve pestle is fixedly connected with the main spool, and accordingly the main valve adopts a valve whose spool rotates, such as a ball valve.

As an alternative, the main valve stem 5 can be formed with an axial slide groove 54 and has a structure similar to a spline shaft, the gear 53 is slidably fitted on the main valve stem, and the lower end of the main wide rod and the main valve core are It can be rotatably connected and connected with the valve cover 4 in a threaded auxiliary transmission. Therefore, when the piston rod 8 of the hydraulic cylinder reciprocates, the main valve rod moves up and down while rotating, thereby driving the main valve core to reciprocate up and down. Therefore, the main valve can be made into gate valve, gate valve, plunger valve and so on.

The operation process of this valve is basically the same as that of Embodiment 3. Example 5

8 and 9 show a fifth embodiment of the fluid control pigging valve of the present invention. As shown in Figures 8 and 9, the fluid control pigging valve of this embodiment is also composed of a main valve 1 and a control device, wherein the control device is composed of a hydraulic cylinder 6, a pass valve 56, a controller, and the like.

The structure of the main valve 1 is the same as that described in Embodiment 1.

The hydraulic cylinder 6 is basically the same as that described in Embodiment 1, the difference is that a through hole communicating with the valve cavity of the hydraulic cylinder lower chamber 10 and the main valve 1 is opened on the valve cover 4 of the main valve, and a common energy-saving device is installed in the through hole. A two-way regulating valve 55 that controls forward and reverse flow. The lower chamber 10 of the hydraulic cylinder communicates with the fluid pipe 3 through the two-way regulating valve and the valve chamber of the main valve 1. The two-way regulating valve can select the differential flow adjustable shuttle valve of the inventor for use.

The passage valve 56 is a common piston valve, which can be installed on the fluid pipe 3 with a bracket, or installed on the main valve 1 or integrated with the main valve. The upper end of the valve cavity of the passage valve is formed with a port connected to the fluid pipe 3 through a pipeline, and the lower end of the valve cavity is formed with a connection with the atmosphere or connected with the storage tank through a pipeline. The upper interface, the middle part of the valve cavity of the pass valve forms an interface connected to the upper cavity 9 of the hydraulic cylinder 6 through the pipeline 58. When the passage spool 59 of the passage valve travels to the lower part of the valve chamber, the hydraulic upper chamber 9 communicates with the fluid pipe 3 through the pressurized chamber 60 formed above the passage valve spool 59; At this time, the upper hydraulic chamber 9 communicates with the atmosphere through the pressure relief chamber 61 formed under the spool 59 of the passage valve. The valve stem 40 connected with the pass-through valve core protrudes upwards from the valve casing, a sealing device is arranged between the valve stem and the valve casing, and a suction cup 30 is arranged on the upper end of the valve stem.

The controller is composed of the same electromagnetic switch 29 as in Embodiment 1, an electric controller 32 and a wire 34 connecting the two.

The fluid control pigging valve controls the passage valve 56 through the electromagnetic switch 29 by manipulating the electric controller 32 during the normal working period of controlling the fluid and when using the pig to clean the fluid pipe. When the fluid pipe needs to be cleaned, the electric controller 32 is manipulated to make the electromagnetic switch 29 engage the suction cup 30, thereby lifting the passage spool 59. At this time, the upper cavity 9 of the hydraulic cylinder 6 is connected to the outside atmosphere through the pipeline 58 and the pressure relief cavity 61 of the pass valve; The lower chamber 10 pushes the piston T so that the main valve core rises, so that the pig flow channel of the main valve 1 coincides with the flow channel of the fluid pipe. When the electric controller 32 is manipulated so that the electromagnetic switch 29 releases the suction cup 30, the passage valve core 59 moves downward under the action of gravity or an additional biasing device, and the upper part of the hydraulic cylinder 6 is transferred through the pipeline 58 and the passage valve pressurization chamber 60. The cavity 9 communicates with the fluid pipe 3 . The pressure fluid in the fluid pipe 3 enters the upper chamber 9 of the hydraulic cylinder 6, and under the joint action of the pressure fluid in the upper chamber 9 and the gravity of the piston 7, piston rod 8, main valve stem 5, and main valve core or an additional offset Under the action of the pressure device, the piston 7 and the main valve core go down, so that the fluid in the lower chamber 10 returns to the fluid pipe 3 through the two-way regulating valve 55 and the valve chamber of the main valve 1, and the main valve 1 returns to the normal working state. When the valve is in the normal working state, the control of the fluid can be realized by manipulating the electric controller to control the opening, closing and opening of the main valve through the passage valve and hydraulic pressure. Example 6

Figure 10 shows a sixth embodiment of the fluid control pigging valve of the present invention. As shown in FIG. 10, the structure of the fluid control pigging valve of this embodiment is basically the same as that of Embodiment 5. Its characteristic is that the controller is also equipped with a sensor 62 installed on the fluid pipe 3 on the upstream side of the main valve 1, and a sensor 63 installed on the fluid pipe 3 on the downstream side of the main valve 1, and the two sensors use a wire 64 and a wire 65 are electrically connected with the electric controller 32 respectively. The sensor can be selected as an electromagnetic sensor of a common structure that can cooperate with the pig 19. Replacement pages (Rule 26) The two sensors 62 and 63 respectively transmit signals to the electric controller that the pigs traveling to the upstream and downstream sides of the main valve, and the electric controller controls the passage valve 56 and the hydraulic cylinder 6 according to the received signals, so as to realize the control of the main valve. 1 control. The fluid control pigging valve of this embodiment can realize the automatic control of the main valve 1. Example 7

11 and 12 show a seventh embodiment of the fluid control pigging valve of the present invention. As shown in Figures 11 and 12, the structural configuration of the fluid control pigging valve of this embodiment is basically the same as that of Embodiment 5, and its characteristic is that the controller is also equipped with a lever mechanism.

The lever mechanism includes a lever 66 extending along the fluid pipe 3, which is hinged on the support 67, and the support can be fixed on the fluid pipe 3. Push rods 68 and 69 are hinged at the front and rear ends of the pivot center of the lever, and the two push rods can extend into the fluid pipe 3 on the upstream side of the main valve 1 to a proper depth, and a seal is provided between the push rod and the fluid pipe. mechanism. The distance between the two push rods is determined according to the travel speed of the pig and the movement speed of the hydraulic cylinder piston, so as to ensure that the piston 7 of the hydraulic cylinder has enough time to rise to its upper position. In addition, the distance between the push rod 69 and the main valve should also be determined according to the travel speed of the pig and the movement speed of the hydraulic cylinder piston, so as to ensure that the pig has enough time to pass through the main valve. In addition, a passage valve rod 70 is fixedly connected to the spool of the passage valve 56, and the passage valve rod 70 is hinged to one end of the lever at the upstream side of the pivot center, thereby forming a lever-type sensing mechanism. In addition, one end of the lever located on the downstream side of the lower pivot center can also be hinged to the passage valve stem. When this structure is adopted, the passage valve should be set so that the pressurized chamber 60 communicating with the fluid pipe is located at the lower part of the valve chamber. , and the pressure relief chamber 61 communicating with the atmosphere is located on the upper part of the valve core. The lever-type sensing mechanism can be provided with a shield 71 for protection.

When the valve is in the normal working state of controlling the fluid, its working process is the same as that of Embodiment 1. The electromagnetic switch 29 is controlled by manipulating the electric controller 32, and the opening and closing of the main valve 1 is controlled through the passage valve 56 and the hydraulic cylinder 56. Closing and opening, so as to realize the control of the fluid.

The working process of the rod and pestle sensor mechanism will be described below. When cleaning the fluid pipe with a pig, when the pig 19 travels to the push rod 68, as shown in FIG. decline. The rotation of the lever 66 makes the passage valve rod 70 and thus the passage valve core 59 go upward, the upper chamber 9 of the hydraulic cylinder 6 is connected to the atmosphere through the pressure relief chamber 61, and the fluid in the upper chamber is released, and the pressure fluid in the fluid pipe passes through the main valve. 1 and the two-way regulating valve 55 enter the lower chamber 10 of the hydraulic cylinder, so that the piston 7 rises and lifts the main valve core through the piston rod 8 and the main valve stem 5, and the main valve is opened until the pig is in the passing state. Replacement pages (Rule 26) When the pig 19 travels to the push rod 69, as shown in FIG. 11, the pig 19 pushes up the push rod 69 to rotate the lever 66 and lower the push rod 68. The rotation of the lever 66 makes the passage valve rod 70 and thus the passage valve core 59 descend and reset, and the upper chamber 9 of the hydraulic cylinder 6 is connected to the fluid pipe 3 through the pressurization chamber 60, so that the pressure fluid enters the upper chamber of the hydraulic cylinder through the pressurization chamber 60 9, and the fluid in the lower chamber 10 of the hydraulic cylinder flows into the valve chamber of the main valve through the two-way regulating valve 55. The speed at which the fluid in the lower hydraulic chamber 10 flows into the main valve chamber is regulated by the two-way regulating valve 55, so that the descending speed of the piston 7 and thus the main valve core is controlled to ensure that the pig passes through the main valve smoothly. After the pig passes through the main valve, the piston 7 lowers the main spool to reset, and restores the normal working state of the valve.

As an alternative, the push rod 68 hinged to the lever 66 can be omitted, so that the end of the passage valve rod 70 of the passage valve 56, which is hinged to the lever, extends into the fluid pipe 3 to an appropriate depth.

As another alternative, the push rod 69 hinged to the lever 66 can extend into the fluid pipe 3 on the downstream side of the main valve 1 to a suitable depth. In this case, the operation of the pigging valve is similar to that shown in Figure 10.

As yet another alternative, the two-way regulating valve 55 can adopt a two-way regulating valve with a time-delay function (please refer to the patent No. 87103004.7 filed in 1987 and authorized to the inventor), and the pig utilizes the Time delay through the main valve.

In addition, the lower chamber 10 of the hydraulic cylinder can also communicate with the fluid pipe 3 via a pipeline, and the two-way regulating valve 55 is arranged on the pipeline. Example 8

Figure 13 shows the eighth embodiment of the fluid control pigging valve of the present invention. As shown in Figure 13, its overall structure is basically the same as that of Embodiment 7, the difference is:

The hydraulic cylinder 6 is fixed horizontally on the valve body 2 of the main valve 1 with a bracket, and the lower cavity 10 of the hydraulic cylinder is communicated with the valve cavity of the main valve 1 through a pipeline 72, and a two-way adjustment can be installed on the pipeline 72. valve. The piston rod 8 is perpendicular to the main valve pestle 5, and a rack 52 is made on the extended end of the hydraulic cylinder piston rod 8.

The main valve rod 5 of the main valve 1 is fixed with a gear 53 meshing with the rack 52 of the piston rod 8, so that the main valve rod rotates with the reciprocating motion of the piston rod. The main valve stem is fixedly connected with the main spool, and accordingly the main valve adopts a valve whose spool rotates, such as a ball valve,

As an alternative, the main valve stem 5 can be formed with an axial slide groove 54 and has a structure similar to a spline shaft, the gear 53 is slidably fitted on the main valve stem, and the lower end of the main valve stem is connected to the main valve core. It can be rotatably connected and connected with the valve cover 4 in a threaded auxiliary transmission. Thus when the piston rod 8 of the hydraulic cylinder reciprocates, the replacement page (Article 26 of the Rules) The main valve stem moves up and down while rotating, thereby driving the main valve core to reciprocate up and down. Therefore, the main valve can be made into gate valve, gate valve, plunger valve, etc.

The operation of the fluid control pigging valve of this embodiment is basically the same as that of Embodiment 7.

Replacement pages (Rule 26)

Claims (16)

1. Claim

   1. a kind of fluid control valve for pig, including：

   Main valve（1), its valve body (2) for including connecting with fluid hose (3), the main valve plug that is movably arranged in body cavity and the main valve being connected with main valve plug are dry (5)；And

   Control device, the control device includes：

   Hydraulic cylinder (6), it includes the piston pestle (8) for configuring the piston (7) in cylinder body and being connected with piston, the piston rod is connected with the main valve pestle (5), to drive main valve plug to move main valve plug by main valve stem；

   Including straight way valve（11,56) valve gear, the straight way valve configuration is on the pipeline of connection fluid hose and hydraulic cylinder；And

   Controller, for controlling current valve events so as to moving back and forth using the pressure fluid control piston in fluid hose (3).

   2. fluid control valve for pig according to claim 1, it is characterised in that the straight way valve（11) it is used for two chambers (9 separated by piston for controlling hydraulic cylinder, 10) connection between fluid hose and air, current valve core (17) can enter its first operating position by starting controller, when current valve core is located on first operating position, fluid hose is connected with the chamber of hydraulic cylinder first (10)；Current valve core can enter its second operating position by disabling controller simultaneously, and when current valve core is located on second operating position, fluid hose is connected with the chamber of hydraulic cylinder second (9).

   3. fluid control valve for pig according to claim 1, it is characterized in that, connection of the chamber (9) between fluid hose and air that the straight way valve (56) is used to control in two chambers separated by piston of hydraulic cylinder (6), it is wealthy that the valve gear also includes a bidirectional modulation（55), on the path between another chamber (10) and fluid hose (3) of the Bidirectional adjusting valve configuration in the chamber of hydraulic cylinder two；The current valve core (59) can enter its first operating position by starting controller, when current valve core is located on first operating position, and the fluid in fluid hose is via Bidirectional adjusting valve（55) another chamber of hydraulic cylinder is entered（10);Current valve core can enter its second operating position by disabling controller simultaneously, when current wealthy valve element is located on second operating position, and the fluid in fluid hose enters chamber (9) described in hydraulic cylinder via straight way valve.

   4. the fluid control valve for pig according to Claims 2 or 3, it is characterised in that the controller includes controlling straight way valve via an electromagnetic switch (29)（11,56) electric controller (32) of action.

   5. fluid control valve for pig according to claim 4, it is characterised in that the controller also includes the first sensor (31,63) electrically connected with electric controller, the sensor is fitted in main valve（1) page (the 26th article of detailed rules and regulations) is replaced in downstream Fluid hose (3) on, for detecting passing through for wiper (19), the electric controller, which responds the wiper that the first sensor detects, powers off electromagnetic switch (29) by signal, so as to disable controller.

   6. fluid control valve for pig according to claim 5, it is characterised in that the controller also includes the second sensor electrically connected with electric controller, the sensor is fitted in main valve（1) on the fluid hose (3) of upstream side, for detecting passing through for wiper (19), the controller responds the wiper that the second sensor detects makes electromagnetic switch (29) be powered by signal, so as to enable controller.

   7. fluid control valve for pig according to claim 5, it is characterized in that, the controller also includes the valve element (17 with straight way valve, 59) connected straight way valve pestle, when current valve core is located on its second operating position, main valve is stretched into one end away from current valve core of current valve rod（1) in the fluid hose (3) of upstream side, and the wiper (19) being arranged so that in advancing can extrapolate and pass through valve rod and trigger electromagnetic switch (29) energization, so as to enable controller.

   8. fluid control valve for pig according to claim 2, it is characterized in that, the controller also includes the current valve rod (18) being connected with current wealthy valve element, when current valve core is located on its second operating position, main valve is stretched into one end away from current valve core of current valve rod（1) in the fluid hose (3) of upstream side, and the wiper (19) being arranged so that in advancing can extrapolate and pass through valve rod and current valve core be moved into its first operating position；The controller also includes and straight way valve（11) the fluid power Bao Chi Red (35) for making to connect and one are pushed violently and reset valve (41), the valve element (42) for resetting valve (41) is connected with a reset valve rod (43), reset valve element (42) and be biased in together with valve rod is resetted by a spring (50) on its first operating position, on first operating position, reset valve rod stretches into main valve away from the one end for resetting valve core（1) in the fluid hose (3) in downstream, and be arranged so that advance in wiper (19) can gram month good biasing device bias and extrapolate reset valve rod with by reset valve core switch to its second operating position；In current valve core（17) when being extrapolated to its first operating position by wiper, controller is activated, fluid power keeps cylinder (35) to be connected via reset valve and straight way valve with fluid hose (3), current valve core is maintained on its first operating position；And when reset valve (41) is extrapolated to by wiper on its second place, fluid power keeps cylinder (35) via valve and atmosphere is resetted, so that controller is deactivated.

   9. fluid-controlled pipe cleaning according to claim 2 is wealthy, it is characterised in that the straight way valve（1 1) be one or two position four-way valve

   10. fluid control valve for pig according to claim 8, it is characterised in that the reset valve (41) is a two-position three-way valve.

   1 1. fluid control valve for pig according to Claims 2 or 3, it is characterised in that the hydraulic cylinder (6) and straight way valve（11,56) pipeline (24,25,58) between is provided with Bidirectional adjusting valve.Replace page (the 26th article of detailed rules and regulations)

   12. fluid control valve for pig according to claim 2, it is characterised in that the controller includes controlling straight way valve via an electromagnetic switch (29)（11) electric controller (32) of action, is under the usual working condition being controlled to fluid in the main valve, can be by manipulating electric controller (32) through electromagnetic switch (29) control straight way valve（11), it is allowed on request connect the epicoele (9) or cavity of resorption (10) of fluid hose or ambient atmosphere and hydraulic cylinder (6) to control the lifting of piston in hydraulic cylinder (7), and then unlatching, closing and the aperture of control bound, so as to realize the control to fluid.

   13 fluid control valve for pig stated according to claim 3, it is characterized in that, the controller also includes the current valve rod (70) being connected with the valve element (59) of straight way valve (56) and a bar bar (66) extended along fluid hose (3), the two ends of lever pivoting centre are respectively articulated with a push rod (68, 69), and the current valve rod is articulated with one end positioned at its pivoting centre upstream side of lever, when current valve core is on its second operating position, the push rod (68) positioned at the pivoting centre upstream side stretches people's main valve（1) in the fluid hose (3) of upstream side, and the wiper (19) being arranged so that in advancing can extrapolate the push rod (68) to start controller；And when current valve core is located on its first operating position, the second push rod (69) positioned at the pivoting centre downstream stretches into main valve（1) in the fluid hose (3) of upstream side, and the wiper (19) being arranged so that in advancing can extrapolate the second push rod to disable controller, the Bidirectional adjusting valve (55) is used for the speed for adjusting the fluid incoming fluid pipe (3) in chamber described in hydraulic cylinder (10), so as to the movement velocity of control bound core, to ensure that wiper has time enough to pass through main valve.

   The 14 blunt fluid control valve for pig stated according to claim 3 of, it is characterized in that, the controller also bar bar (66), the downstream of lever pivoting centre is articulated with a push rod (69), and the current valve rod is articulated with one end positioned at its pivoting centre upstream side of lever, when current valve core is on its second operating position, the current valve rod stretches into main valve（1) in the fluid hose (3) of upstream side, and the wiper (19) being arranged so that in advancing can extrapolate current valve rod to start controller；And when current valve core is located on its first operating position, the push rod positioned at the pivoting centre downstream stretches into main valve（1) in the fluid hose (3) of upstream side, and the wiper being arranged so that in advancing（19) pestle is pushed away described in extrapolating to disable controller, the Bidirectional adjusting valve is used for the speed for adjusting the fluid incoming fluid pipe (3) in chamber described in hydraulic cylinder (10), so as to the movement velocity of control bound core, to ensure that wiper has time enough by main valve.

   15 fluid control valve for pig stated according to claim 14, it is characterised in that the Bidirectional adjusting valve (55) is has the Bidirectional adjusting valve of delay function simultaneously, and wiper passes through main valve using the delay caused by it.

   16 fluid control valve for pig stated according to claim 3, it is characterised in that the controller also replaces page (the 26th article of detailed rules and regulations) Including with straight way valve（56) the connected current valve rod (70) of valve element (59) and a bar bar (66) extended along fluid hose (3), the two ends of lever pivoting centre are respectively articulated with a push rod (68,69), and the current valve rod is articulated with one end positioned at its pivoting centre upstream side of lever, when current valve core is on its second operating position, the first push rod (68) positioned at the pivoting centre upstream side stretches into main valve（1) in the fluid hose (3) of upstream side, and the wiper (19) being arranged so that in advancing can extrapolate the first push rod to start controller；And when current valve core is located on its first operating position, the second push rod (69) positioned at the pivoting centre downstream stretches into main valve（1) in the fluid hose (3) in downstream, and the wiper (19) being arranged so that in advancing can extrapolate the second push rod to disable controller.

   17 fluid control valve for pig according to claim 3, it is characterized in that, the bar bar (66) of the controller, the downstream of thick stick pestle pivoting centre is articulated with a push rod (69), and the current valve rod is articulated with one end positioned at its pivoting centre upstream side of lever, when current valve core is on its second operating position, the current valve rod stretches into main valve（1) in the fluid hose (3) of upstream side, and the wiper (19) being arranged so that in advancing can extrapolate current valve rod to start controller；And when current valve core is on its first operating position, the push rod positioned at the pivoting centre downstream stretches into main valve（1) in the fluid hose (3) in downstream, and the wiper (19) being arranged so that in advancing can extrapolate the push rod to disable controller.

   18 fluid control valve for pig stated according to claim 3, it is characterised in that the straight way valve (56) is a two-position three-way valve.

   19. fluid control valve for pig according to claim 3, it is characterized in that, the controller includes the electric controller (32) that straight way valve (56) action is controlled via an electromagnetic switch (29), it is in the main valve under the usual working condition being controlled to fluid, can be by manipulating electric controller (32) through electromagnetic switch (29) control straight way valve（11), it is allowed on request connect the epicoele (9) of fluid hose or ambient atmosphere and hydraulic cylinder (6) to control the lifting of piston in hydraulic cylinder (7), and then main Gang unlatching, closing and aperture are controlled, so as to realize the control to fluid.

   20. fluid control valve for pig according to claim 1, it is characterised in that the piston rod (8) of the hydraulic cylinder (6) couples with main valve stem (5) coaxial line.

   21. fluid control valve for pig according to claim 1, it is characterized in that, the piston pestle (8) of the hydraulic cylinder (6) couples via a transmission mechanism with main valve pestle (5) vertical-transmission, main valve stem (5) is rotated when piston rod (8) is moved back and forth, and the main valve is a ball valve.

   22. fluid control valve for pig according to claim 1, it is characterised in that the hydraulic cylinder replaces page (yarn of detailed rules and regulations the 26th) (6) piston rod (8) couples via a transmission mechanism with main valve stem (5) vertical-transmission, and piston pestle (8) is moved axially while main Gang bars (5) rotate when moving back and forth.

   Replace page (the 26th article of detailed rules and regulations)