CN1479030A - Miniature Double Diaphragm Solenoid Valve - Google Patents

Abstract

The invention relates to a miniature double-diaphragm electromagnetic valve with fluid medium automatic control equipment. It is assembled by the electromagnetic assembly and the valve body assembly. The electromagnetic assembly consists of the valve sleeve, the through hole at the bottom of the valve sleeve, the hollow iron that extends out of the through hole, the lower spring of the hollow iron inner hole rotary sleeve and the use The fasteners used to adjust the deformation of the lower spring, the valve core at the upper end of the hollow stop iron, the electromagnetic coil set between the valve sleeve, the valve core and the hollow stop iron, and the electromagnet used to be installed with the valve body and located at the top of the electromagnetic coil The end cover is composed of; the valve body assembly is composed of the main valve body, two or more main valve body passages radially penetrated in the main valve body, and an axial through hole perpendicular to the main valve body passage is opened at the center of the main valve body , the upper diaphragm, the lower diaphragm, the force transmission column installed axially between the two diaphragms, and the top of the main valve body connected by fasteners. It consists of a valve body cover, a spring head protruding from the top of the valve body cover and axially built in for manual switching, and an upper spring that is sheathed on the spring head.

Description

Miniature Double Diaphragm Solenoid Valve

technical field

The invention relates to an automatic control device with a fluid medium, in particular to a miniature double-diaphragm electromagnetic valve.

Background technique

Most of the existing miniature solenoid valves are straight-through solenoid valves and single-diaphragm solenoid valves.

The straight-through solenoid valve blocks the liquid flow (or air flow) passage by pressing and closing the valve core and the valve passage port, thereby realizing the three-way or two-way function. When two-way is realized, the valve has two valve channel ports. When energized and not energized, the valve core respectively presses the corresponding valve channel port to block the corresponding channel, which plays the role of channel selection. Its disadvantage is that because the straight-through solenoid valve directly selects the channel through the valve core, the valve core needs to be in direct contact with the medium flowing through the valve, and the spring that controls the movement of the valve will also be in contact with the medium, so it is not resistant to chemical corrosion. Although this structure can realize the function of three-way or two-way, the interchangeability of its two-way and three-way is poor.

The single-diaphragm solenoid valve is sealed by the diaphragm and pressed against the valve channel port to block the channel, and the diaphragm is pressed or loosened by the movement of the valve core to play the role of on-off selection. The valve bodies of existing miniature solenoid valves of this type are mostly made of PTFE material, so they have good corrosion resistance. Its disadvantage is that due to structural limitations, it is mostly used in two-way normally closed solenoid valves, and it is difficult to realize the function of three-way valves, and the processing of PTFE materials will greatly increase the cost of the product.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings in the above-mentioned prior art and provide a high-temperature-resistant medium, resistant to chemical corrosion, capable of switching between three-way and two-way functions, strong interchangeability, no need for external joints, and can be used in different places. It is a miniature double-diaphragm solenoid valve with long service life and simple structure, which switches the on-off state of the solenoid valve under the power-on state, automatically compensates the deviation of the matching force caused by the machining size error.

The object of the present invention can be achieved through the following measures:

This kind of automatic control equipment with fluid medium, especially the miniature double-diaphragm solenoid valve, includes electromagnetic components and valve body components. Its special feature is that it is assembled from electromagnetic components and valve body components. There is a through hole at the bottom end of the sleeve, the hollow iron that extends out of the through hole, the lower spring of the inner hole of the hollow iron and the fasteners used to adjust the deformation of the lower spring, the valve core at the upper end of the hollow iron, The electromagnetic coil set between the valve sleeve, the valve core, and the hollow iron stopper is composed of an electromagnetic end cover for installation with the valve body and located on the top of the electromagnetic coil; the valve body assembly is radially penetrated by the main valve body and the main valve body. There are two or more main valve body passages, the center of the main valve body has an axial through hole perpendicular to the main valve body passage, and the axial through holes on the two end faces of the main valve body are respectively opposite. The upper diaphragm, the lower diaphragm, the force transmission column installed axially between the two diaphragms, the valve body cover connected by fasteners at the top of the main valve body, protruding from the top of the valve body cover and axially built in can be used for manual It is composed of the spring head of the switch and the upper spring sleeved on the spring head in the valve body cover.

The object of the present invention can also be achieved through the following measures:

A liquid flow cavity is formed between the upper diaphragm, the lower diaphragm, the axial through hole and the channel of the main valve body; the upper diaphragm and the lower diaphragm are positioned through a force transmission column.

The three passages radially connected to the main valve body with one inlet and two outlets are the common end on the middle passage of the valve cavity, the normally open end and the normally closed end which are arranged at an acute angle to the common end at the center of the main valve body. .

The two passages of one-in and one-out structure radially connected with the main valve body are two-way valve ports connected in a horizontal line, and there is a gap groove at the passage opening of the main valve body cavity.

The diaphragm is composed of a convex part pressed against the channel opening in the middle, a convex part used for sealing at the edge, and an annular convex structure formed by a thin-walled ring surface between the peripheral convex part and the central convex part.

The main valve body and force transmission column in contact with the fluid medium are made of special engineering plastics PPS or PEEK that can be injected.

The upper passage port of the main valve inner cavity of the normally closed function is provided with a notch groove.

The lower channel opening of the inner chamber of the main valve body of the normally open function is provided with a notch groove.

The diaphragm is made of corrosion-resistant EPDM material.

The main valve body is injection-molded for the fluid connection of the hose.

Compared with the prior art, the present invention has the following advantages:

1. In the case of the same structure, only one part is replaced to realize the function switching of three-way and two-way, which simplifies the processing technology of solenoid valves with different functions.

2. The valve body can have its own liquid joints, no external joints are required.

3. Equipped with a manual switch, the on-off state of the solenoid valve can be switched by the manual switch without power on.

4. Equipped with an adjustment device, it can compensate the deviation of the matching force caused by the error of the processing size.

5. High temperature resistance, chemical corrosion resistance.

6. Simple structure, low cost and long service life.

Description of drawings

Fig. 1 is the front sectional view of the double-diaphragm miniature electromagnetic three-way valve of the present invention.

Fig. 2 is a top view of the double-diaphragm miniature electromagnetic three-way valve of the present invention.

Fig. 3 is a schematic diagram of the conduction of the normally open channel of the double-diaphragm miniature electromagnetic three-way valve of the present invention.

Fig. 4 is a schematic diagram of the conduction of the normally closed channel of the double-diaphragm miniature electromagnetic three-way valve of the present invention.

Fig. 5 is a front sectional view of a double-diaphragm miniature electromagnetic two-way valve of the present invention.

Fig. 6 is a top view of the double-diaphragm miniature electromagnetic two-way valve of the present invention.

Fig. 7 is a schematic structural view of the non-energized state of the two normally closed valves of the double-diaphragm miniature electromagnetic two-way valve of the present invention.

Fig. 8 is a structural schematic diagram of the energized state of the two normally closed valves of the double-diaphragm miniature electromagnetic two-way valve of the present invention.

Fig. 9 is a schematic diagram of the structure of the double-diaphragm miniature electromagnetic two-way valve of the present invention in the non-energized state of the two normally open valves.

Fig. 10 is a schematic structural view of the double-diaphragm miniature electromagnetic two-way valve of the present invention in the energized state of the two normally open valves.

Fig. 11 is a perspective view of the double-diaphragm miniature solenoid valve diaphragm of the present invention.

Fig. 12 is a cross-sectional view of the double-diaphragm miniature solenoid valve diaphragm of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawing:

Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 9, Fig. 10 have shown the first embodiment of the present invention (utility model).

This miniature double-diaphragm solenoid valve with fluid medium self-control equipment is assembled by an electromagnetic assembly 1 and a valve body assembly 2 . The electromagnetic assembly 1 consists of the valve sleeve 10, the through hole 101 provided at the bottom of the valve sleeve 10, the hollow iron stopper 12 extending out of the through hole 101, the lower spring 120 of the inner hole of the hollow iron stopper 12, and the lower spring 120 for adjusting the lower spring. The hexagonal countersunk head screw 121 of the deformation amount, the valve core 13 at the upper end of the hollow iron stopper 12, the electromagnetic coil 14 sleeved between the valve sleeve 10, the valve core 13 and the hollow iron stopper 12, are used for installing with the valve body assembly 2 and The electromagnet end cover 11 located at the top of the electromagnetic coil 14 is composed; the valve body assembly 2 is composed of the main valve body 20, the common end 201 on the middle channel of the valve inner cavity radially penetrated in the main valve body 20, and the common end 201 on the main valve body. The main valve body channel 200 formed by the normally open end 202 and the normally closed end 203 arranged at the center of the circle at an acute angle, and the center of the main valve body 20 has an axial through hole 204 perpendicular to the main valve body channel 200. The upper diaphragm 21, the lower diaphragm 22, the force transmission column 23 installed axially between the two diaphragms 21, 22, and the main valve body 20 are respectively opposite in the axial through holes 204 on the two end faces of the main valve body 20. The top end is composed of a valve body cover 24 connected by screws 240 , a spring head 25 protruding from the top end of the valve body cover 24 and axially built in, and an upper spring 26 threaded on the spring head 25 . Both the upper diaphragm 21 and the lower diaphragm 22 are composed of a convex part 210 pressed against the channel opening in the middle, a protrusion 211 on the edge for sealing, and a thin-walled annular surface 212 between the edge protrusion 211 and the central convex part 210. The structural composition is made of corrosion-resistant EPDM material. A liquid flow cavity is formed between the upper diaphragm 21 , the lower diaphragm 22 , the axial through hole 204 and the main valve body channel 200 ; The main valve body 20 and the force transmission column 23 that are in contact with the chemical fluid medium are made of injection-molded special engineering plastics PPS or PEEK. The main valve body 20 is fixedly connected with a fluid joint (not shown in the figure) which is injection-molded for connecting a hose.

The usage process is as follows:

When there is no power-on initial state, the solenoid valve has no electromagnetic force, and the lower spring force presses the valve core 13 upwards so that the lower diaphragm 22 presses against the lower channel port 205 of the inner chamber of the valve. The lower spring force is greater than the upper spring force, and the force transmission The column 23 lifts the upper diaphragm 21 upwards, and the upper diaphragm 21 forms a fixed gap with the upper channel port 206 of the valve cavity. At this time, the channel of the upper channel port 206 of the valve cavity is connected, which is called a normally open channel ( See Figure 3). The lower channel opening 205 of the valve cavity is blocked by the lower diaphragm 22, which is called a normally closed channel. The fluid passes through the common end 201 and connects with the normally open end 202 through the normally open channel, while the common end and the normally closed end 203 are blocked. When energized, the electromagnetic force makes the valve core 13 and the hollow stop iron 12 attract, and the lower spring force does not act on the lower diaphragm 22 at this time, and the upper spring force makes the upper diaphragm 21 press against the upper passage port 206 of the valve inner cavity, and the lower spring force does not act on the lower diaphragm 22. The diaphragm 22 is lifted up by the force transmission column 23, and a fixed gap is formed with the lower passage port 205 of the valve cavity. At this time, the conduction direction of the valve is opposite to the initial state when there is no power, that is, the normally open passage is closed, and the common The channel between the common terminal 201 and the normally open terminal 202 is blocked, the normally closed channel is opened, and the channel between the common terminal 201 and the normally closed terminal 203 is turned on. The spring head 25 can also be used as a manual switch to manually change the operating state of the solenoid valve without power on. When the spring head 25 (manual switch) is pressed down, the upper diaphragm 21 and the lower diaphragm 22 are pressed to the opposite direction of the initial state, and the channel opening originally pressed by the upper diaphragm 21 and the lower diaphragm 22 is opened. , the working state of the solenoid valve is also changed.

Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 11, Fig. 12 show the second embodiment of the present invention:

This miniature double-diaphragm solenoid valve with fluid medium self-control equipment is assembled by an electromagnetic assembly 1 and a valve body assembly 2 . The electromagnetic assembly 1 consists of the valve sleeve 10, the through hole 101 provided at the bottom of the valve sleeve 10, the hollow iron stopper 12 extending out of the through hole 101, the lower spring 120 of the inner hole of the hollow iron stopper 12, and the lower spring 120 for adjusting the lower spring. The hexagonal countersunk head screw 121 of the deformation amount, the valve core 13 at the upper end of the hollow iron stopper 12, the electromagnetic coil 14 sleeved between the valve sleeve 10, the valve core 13 and the hollow iron stopper 12, are used for installing with the valve body assembly 2 and The electromagnet end cover 11 located at the top of the electromagnetic coil 14 is composed of; the valve body assembly 2 is composed of the main valve body 20 , the two-way valve port 207 penetrated radially through the main valve body 20 in a horizontal line, and the main valve body 20 with normally closed function The upper channel opening 206 of the cavity has a notch groove 27, and the center of the main valve body 20 has an axial through hole 204 perpendicular to the main valve body passage 200, and is located in the axial through holes 204 on the two end faces of the main valve body 20. The upper diaphragm 21, the lower diaphragm 22, the force transmission column 23 installed axially between the two diaphragms 21, 22, the valve body cover 24 connected by the screw 240 at the top of the main valve body 20, the slave valve body The top end of the cover 24 protrudes and consists of a spring head 25 built in the axial direction and an upper spring 26 that is sheathed on the spring head 25 . Both the upper diaphragm 21 and the lower diaphragm 22 are composed of a convex part 210 pressed against the channel opening in the middle, a protrusion 211 on the edge for sealing, and a thin-walled annular surface 212 between the edge protrusion 211 and the central convex part 210. The structural composition is made of corrosion-resistant EPDM material. The main valve body 20 and the force transmission column 23 that are in contact with the chemical fluid medium are made of injection-molded special engineering plastics PPS or PEEK.

The usage process is as follows:

The upper channel port 206 of the inner chamber of the main valve body 20 has a notch groove 27. When in the initial state, the lower spring force pushes up the valve core 13 so that the lower diaphragm 22 is pressed against the lower channel port 205 of the valve inner cavity. , the channel between the two ports is blocked, which is normally closed. When energized, the electromagnetic force causes the valve core 13 to engage with the hollow stopper 12. At this time, the lower spring force does not act on the lower diaphragm 22, and the upper spring force makes the upper diaphragm 21 press against the upper channel port 206 of the valve cavity, and the fluid Can flow through the notch groove 27, at this time the passage between the two ports is conducted. The spring head 25 can also be used as a manual switch to manually change the operating state of the solenoid valve without power on. When the spring head 25 (manual switch) is pressed down, the upper diaphragm 21 and the lower diaphragm 22 are pressed to the opposite direction of the initial state, and the channel opening originally pressed by the upper diaphragm 21 and the lower diaphragm 22 is opened. , the working state of the solenoid valve is also changed.

Fig. 5, Fig. 6, Fig. 9, Fig. 10, Fig. 11, Fig. 12 show the third embodiment of the present invention:

This miniature double-diaphragm solenoid valve with fluid medium self-control equipment is assembled by an electromagnetic assembly 1 and a valve body assembly 2 . The electromagnetic assembly 1 consists of the valve sleeve 10, the through hole 101 provided at the bottom of the valve sleeve 10, the hollow iron stopper 12 extending out of the through hole 101, the lower spring 120 of the inner hole of the hollow iron stopper 12, and the lower spring 120 for adjusting the lower spring. The hexagonal countersunk head screw 121 of the deformation amount, the valve core 13 at the upper end of the hollow iron stopper 12, the electromagnetic coil 14 sleeved between the valve sleeve 10, the valve core 13 and the hollow iron stopper 12, are used for installing with the valve body assembly 2 and The electromagnet end cover 11 located at the top of the electromagnetic coil 14 is composed of; the valve body assembly 2 is composed of the main valve body 20 , the two-way valve port 207 penetrated radially through the main valve body 20 in a horizontal line, and the main valve body 20 with normally open function. There is a notch groove 27 in the lower channel opening 205 of the chamber, an axial through hole 204 perpendicular to the main valve body channel 200 is opened at the center of the main valve body 20, and axial through holes 204 located on the two end faces of the main valve body 20 The upper diaphragm 21, the lower diaphragm 22, the force transmission column 23 installed axially between the two diaphragms 21, 22, the valve body cover 24 connected by the screw 240 at the top of the main valve body 20, the slave valve The top end of the body cover 24 protrudes and is composed of a spring head 25 built in the axial direction and an upper spring 26 that is sheathed on the spring head 25 . Both the upper diaphragm 21 and the lower diaphragm 22 are composed of a convex part 210 pressed against the channel opening in the middle, a protrusion 211 on the edge for sealing, and a thin-walled annular surface 212 between the edge protrusion 211 and the central convex part 210. The structural composition is made of corrosion-resistant EPDM material. The main valve body 20 and the force transmission column 23 that are in contact with the chemical fluid medium are made of injection-molded special engineering plastics PPS or PEEK.

The usage process is as follows:

When in the initial state, the lower spring force pushes up the valve core 13 so that the lower diaphragm 22 is pressed against the lower channel port 205 of the valve inner cavity, and the fluid can flow through the gap groove 27. At this time, the channel between the two ports is connected, which is Normally open state; when energized, the electromagnetic force causes the valve core 13 to engage with the hollow stop iron 12, the lower spring force does not act on the lower diaphragm 22, and the upper spring force makes the upper diaphragm 21 press against the upper passage port of the valve inner cavity 206. At this time, the channel between the two ports is blocked, that is, it functions as a shutdown. The spring head 25 can also be used as a manual switch to manually change the operating state of the solenoid valve without power on. When the spring head 25 (manual switch) is pressed down, the upper diaphragm 21 and the lower diaphragm 22 are pressed to the opposite direction of the initial state, and the channel opening originally pressed by the upper diaphragm 21 and the lower diaphragm 22 is opened. , the working state of the solenoid valve is also changed.

Claims (10)

1. automatic control equipment with flowing medium, particularly miniature pair diaphragm electromagnetic valve, comprise electromagnetic assembly and valve component, it is characterized in that: it is assembled by electromagnetic assembly and valve component, electromagnetic assembly is by the through hole that valve pocket, valve pocket bottom have, extend this through hole hollow buting iron, hollow buting iron endoporus rotation set lower spring and be used to adjust fastening piece, the hollow buting iron upper end of lower spring amount of deformation spool, be sleeved on electromagnetic coil between valve pocket and spool, the hollow buting iron, be used for install and electromagnet end cap composition that be positioned at the electromagnetic coil top with valve body; Valve component is by main valve body, the main valve body passage more than two or two that radially connects in the main valve body, the main valve body circle centre position has the axial hole that connects with the main valve body channel vertical, be positioned at the opposed respectively diaphragm of going up of axial hole of two end faces of main valve body, the lower diaphragm plate sheet, the force-transmitting pole that axially is equipped with between two diaphragms, the body cap that the main valve body top connects by fastening piece, stretch out and the axial built-in spring head that can be used for hand switch from the body cap top, the upper spring that is linked in the body cap on the spring head is formed.

2. miniature pair of diaphragm electromagnetic valve according to claim 1 is characterized in that: go up and form liquid stream cavity between diaphragm, lower diaphragm plate sheet, axial hole and the main valve body passage; Locate by force-transmitting pole between last diaphragm and the lower diaphragm plate sheet.

3. miniature pair of diaphragm electromagnetic valve according to claim 1 is characterized in that: three passages that radially connect one-in-and-two-out structure with main valve body be respectively on the valve insertion center-aisle common port, be the Chang Kaiduan and the normal-closed end of the opposed arrangement of acute angle respectively at the main valve body circle centre position with common port.

4. miniature pair of diaphragm electromagnetic valve according to claim 1 is characterized in that: two passages of the one-in-and-one-out structure that radially connects with main valve body are to be the two-way valve port that horizontal line connects.

5. miniature pair of diaphragm electromagnetic valve according to claim 1 is characterized in that: the protuberance that diaphragm is compressed by middle and passway, the projection that the edge is used to seal, the annular protrusion structure that the thin-walled anchor ring between edge protuberance and the center protuberance constitutes is formed.

6. miniature pair of diaphragm electromagnetic valve according to claim 1 is characterized in that: but the special engineering plastics PPS or the PEEK of the main valve body that contacts with flowing medium, force-transmitting pole employing injection moulding make.

7. according to claim 1 or 4 described miniature pair of diaphragm electromagnetic valves, it is characterized in that: the upper channel mouth of the main valve body inner chamber of normally closed function has gap slot.

8. according to claim 1 or 4 described miniature pair of diaphragm electromagnetic valves, it is characterized in that: the lower channel opening of often opening the main valve body inner chamber of function has gap slot.

9. miniature pair of diaphragm electromagnetic valve according to claim 1 is characterized in that: diaphragm adopts corrosion resistant EPDM made.

10. miniature pair of diaphragm electromagnetic valve according to claim 1 is characterized in that: the liquid pipeline connector that is used to connect flexible pipe on the main valve body through molding and forming.

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