Double electric control electromagnetic valve

Abstract

This invention discloses a dual-electro-controlled solenoid valve, comprising a pilot valve assembly, a pilot seat, and a valve body. The pilot valve assembly includes a pilot valve guide seat, a pilot valve group, and a cover plate. The pilot valve guide seat is fixedly connected to the pilot seat and has a mounting cavity with an opening at the lower end. The pilot valve group includes a first pilot valve and a second pilot valve, each with a power pin at its lower end. The inner end of the cover plate has a socket corresponding to each of the two power pins, and the outer end of the cover plate has an electrical connector electrically connected to the two sockets. The adjacent ends of the first and second pilot valves have a connecting structure. During assembly, the first and second pilot valves are pre-assembled into one unit using the connecting structure, then the pre-assembled pilot valve group is inserted into the mounting cavity, and finally the cover plate is fixedly connected to the pilot valve guide seat. At this time, the power pins automatically insert into the corresponding sockets. Through the above configuration, the assembly of this dual-electro-controlled solenoid valve is more convenient and efficient.

Description

Technical Field

[0001] This invention relates to the technical field of solenoid valves, and particularly to a dual-electro-controlled solenoid valve. Background Technology

[0002] Solenoid valves are electromagnetically controlled industrial devices, fundamental components of automation used to control fluids. They are actuators used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. Pilot-operated solenoid valves are devices that switch the operation of the main valve using compressed air pressure. They belong to a composite control system combining electromagnetic and pneumatic control. This valve outputs pilot control air pressure through an electromagnetic pilot directional valve, which actuates the main valve spool to achieve the switching function. Based on the control method, they can be divided into single-electro-controlled and dual-electro-controlled valves; based on the source of the pilot pressure, they can be divided into internally piloted and externally piloted valves.

[0003] The existing dual-electro-controlled solenoid valve requires the pilot valve assembly to be installed by first assembling one pilot valve to the pilot seat, then assembling the other pilot valve to the pilot seat, and finally connecting the cover plate to each pilot valve one by one. This method of assembling the pilot valves one by one cannot guarantee the air circuit sealing between the two pilot valves, so it needs to be improved. In addition, the solenoid valve includes a valve body, a pilot seat, and a pilot valve. The exhaust ports R and S on the valve body are connected to the exhaust channel of the manifold and exhaust through the exhaust channel of the manifold. The exhaust port of the pilot valve and / or the exhaust port of the valve stem piston chamber are generally directly discharged. However, in some special fields, such as semiconductor equipment, semiconductor manufacturing needs to be carried out in a near-perfect clean environment. Therefore, the gas discharged by the solenoid valve needs to be collected and discharged in a unified manner. Thus, the existing solenoid valve needs to be improved to meet the requirements of collection and discharge. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-electro-controlled solenoid valve that is easier and more efficient to assemble, and effectively ensures the air circuit sealing between the first pilot valve and the second pilot valve.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a dual-electro-controlled solenoid valve, comprising a pilot valve assembly, a pilot seat, and a valve body connected in sequence. The pilot valve assembly includes a pilot valve guide seat, a pilot valve group, and a cover plate. The pilot valve guide seat is fixedly connected to the pilot seat. The pilot valve guide seat has a mounting cavity with an opening at the lower end. The pilot valve group includes a first pilot valve and a second pilot valve. The lower ends of the first pilot valve and the second pilot valve are respectively provided with power pins. The inner end of the cover plate is provided with sockets corresponding to the two power pins one by one, and the outer end of the cover plate is provided with sockets corresponding to the two power pins. The electrical connectors for the electrical connection of the sockets have a connection structure at the adjacent ends of the first and second pilot valves. During assembly, the first and second pilot valves are pre-assembled into one unit through the connection structure. Then, the pre-assembled pilot valve assembly is inserted into the mounting cavity. Finally, the cover plate is fixedly connected to the pilot valve guide seat. At this time, the power pin is automatically inserted into the corresponding socket. The cavity wall of the mounting cavity limits the pilot valve assembly in the insertion direction perpendicular to the pilot valve assembly. The upper end face of the mounting cavity cooperates with the cover plate to limit the pilot valve assembly in the insertion direction of the pilot valve assembly.

[0006] Furthermore, the valve body, pilot seat, and pilot valve assembly form a pilot air intake channel, a first pilot air outlet channel, and a second pilot air outlet channel. A first sealing ring is provided between the first pilot valve and the second pilot valve, and between the second pilot valve and the pilot valve guide seat, corresponding to the outer periphery of the pilot air intake channel. A second sealing ring is provided between the first pilot valve and the second pilot valve, and between the second pilot valve and the pilot valve guide seat, corresponding to the position of the first pilot air outlet channel.

[0007] Furthermore, the connection structure is a plug-in structure, which includes a post formed on one of the pilot valves and a slot disposed on the other pilot valve. Multiple sets of posts are provided, and the slots correspond one-to-one with the posts. The first pilot valve and the second pilot valve can be pre-assembled side by side in the same horizontal manner by the insertion and cooperation of the posts and slots.

[0008] Furthermore, the pilot valve guide seat is provided with an annular groove along the opening path on the outer periphery of the corresponding mounting cavity opening, and a sealing ring is installed in the annular groove. When the cover plate is fixedly connected to the pilot valve guide seat, the sealing ring is sandwiched between the cover plate and the pilot valve guide seat.

[0009] Furthermore, one end of the valve body is provided with an air inlet P, a working port A, a working port B, an exhaust port R, an exhaust port S, a first exhaust port, and a second exhaust port. The first exhaust port is used to connect with the exhaust channel of the manifold. An exhaust space is formed between the second exhaust port and the manifold. The second exhaust port is used to connect with the exhaust channel of the pilot valve and / or the piston chamber exhaust channel of the solenoid valve body. A sealing element is provided at the end of the valve body used to connect to the manifold. The sealing element includes an integrally formed first sealing part, a second sealing part, a third sealing part, a fourth sealing part, a fifth sealing part, a sixth sealing part, and a seventh sealing part. When the sealing element is installed in the forward direction, the second sealing part... The first sealing part seals the exhaust port R, the third sealing part seals the working port A, the fourth sealing part seals the air inlet P, the fifth sealing part seals the working port B, the sixth sealing part seals the exhaust port S, and the seventh sealing part surrounds the outer periphery of the first and second exhaust ports. At this time, the gas flowing out of the second exhaust port flows through the first exhaust port to the exhaust channel of the manifold. When the seals are installed in reverse, the sixth sealing part seals the exhaust port R, the fifth sealing part seals the working port A, the fourth sealing part seals the air inlet P, the third sealing part seals the working port B, the second sealing part seals the exhaust port S, and the first sealing part seals the first exhaust port. At this time, the gas flowing out of the second exhaust port is directly discharged through the exhaust space.

[0010] Furthermore, the exhaust port R, working port A, air inlet P, working port B, and exhaust port S are arranged in sequence, with the first exhaust port and the second exhaust port located at the other end of the exhaust port S relative to the working port B, and the second exhaust port located at the lower end of the first exhaust port.

[0011] Furthermore, a pilot air inlet is provided on the other side of the exhaust port S relative to the working port A, and both the first sealing part and the seventh sealing part can be used to seal the pilot air inlet.

[0012] Furthermore, the first and second pilot valves are each equipped with a manual button. The pilot valve guide seat is provided with a circumferentially enclosing dam that covers the manual button. A central hole is provided at the upper end of the dam corresponding to the position of the manual button. The pilot valve assembly also includes a protective structure, which includes a first protective cover or a second protective cover that can be selectively installed on the dam. The surface of the first protective cover is provided with a strip groove, and the surface of the second protective cover is a fully shielded structure. When neither the first nor the second protective cover is installed on the dam, the manual button can be pressed down and rotated through the central hole using a tool to keep the manual button in the operating state. When the first protective cover is installed on the dam, the manual button can be pressed down through the strip groove using a tool. After the pressure is released, the manual button automatically returns to its original position. When the second protective cover is installed on the dam, the central hole is folded by the surface of the second protective cover, thereby restricting the operation of the manual button.

[0013] Furthermore, the first protective cover and the second protective cover are provided with elastic locking feet, and the dam is provided with a locking groove that engages with the elastic locking feet.

[0014] Furthermore, a first anti-rotation part is provided on the outer periphery of the dam, and the first protective cover and the second protective cover are provided with a second anti-rotation part that matches the first anti-rotation part. The first anti-rotation part and the second anti-rotation part cooperate to restrict the rotation of the first protective cover and the second protective cover relative to the dam.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. The dual-electro-controlled solenoid valve of the present invention is easier and more efficient to assemble, and effectively ensures the air circuit sealing between the first pilot valve and the second pilot valve. During assembly, the first pilot valve and the second pilot valve are pre-assembled into one unit through the connection structure, the pre-assembled pilot valve assembly is then inserted into the mounting cavity, and finally the cover plate is fixedly connected to the pilot valve guide seat. At this time, the power pin will automatically be inserted into the corresponding socket.

[0017] 2. The dual-electro-controlled solenoid valve of the present invention can meet the requirements of different working conditions. When the seal is installed in the forward direction, the pilot valve exhaust channel and / or the solenoid valve piston chamber flows into the manifold through the second exhaust port and the first exhaust port, and is collected and discharged through the exhaust channel of the manifold. When the seal is installed in the reverse direction, the pilot valve exhaust channel and / or the solenoid valve piston chamber flows into the second exhaust port, and is directly discharged through the exhaust space.

[0018] 3. The dual-electro-controlled solenoid valve of the present invention is designed with two protective covers for different working conditions. Users can choose the appropriate protective cover according to different working conditions, so that the protective structure is applicable to different working conditions. When the first protective cover is used, the user can use a tool to press down the manual button through the strip groove. After the pressure is released, the manual button will automatically return to its original position. When the second protective cover is used, the second protective cover can prevent the manual button from being operated. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the pilot valve assembly of the present invention when inserted into the mounting cavity.

[0020] Figure 2 This is a schematic diagram of the installation structure of the sealing ring of the present invention.

[0021] Figure 3 This is a cross-sectional view of the present invention.

[0022] Figure 4 This is a schematic diagram of the connection structure of the present invention.

[0023] Figure 5 This is a cross-sectional view of the solenoid valve of the present invention when it is an internal pilot.

[0024] Figure 6 This is the invention Figure 5 Enlarged view of point A.

[0025] Figure 7 This is a cross-sectional view of the solenoid valve of the present invention when it is an externally piloted valve.

[0026] Figure 8 This is a schematic diagram of the limiting rib structure of the present invention.

[0027] Figure 9 This is a schematic diagram of the structure of the seal of the present invention when it is installed in the forward direction.

[0028] Figure 10 This is a schematic diagram of the structure of the seal of the present invention when it is installed in reverse.

[0029] Figure 11 This is a schematic diagram of the forward structure of the sealing element of the present invention.

[0030] Figure 12 This is a schematic diagram of the reverse structure of the sealing element of the present invention.

[0031] Figure 13 This is a schematic diagram of the installation structure of the present invention without the first and second protective covers installed.

[0032] Figure 14 This is a schematic diagram of the installation structure of the first protective cover of the present invention.

[0033] Figure 15 This is a schematic diagram of the installation structure of the second protective cover of the present invention.

[0034] Figure 16 This is a schematic diagram of the structure of the first anti-rotation part and the second anti-rotation part of the present invention.

[0035] Figure 17 This is a schematic diagram of the protective structure of the present invention.

[0036] Figure 18 This is a schematic diagram of the manual button of the present invention.

[0037] In the diagram: 10. Pilot valve assembly; 11. Pilot valve guide seat; 111. Mounting cavity; 112. Limiting rib; 1121. Guide part; 12. Pilot valve group; 121. First pilot valve; 122. Second pilot valve; 123. Power pin; 124. Connection structure; 1241. Insert post; 1242. Slot; 125. First sealing ring; 126. Second sealing ring; 127. Manual button; 1271. Vertical groove; 1272. Horizontal groove; 128. Dam; 1281. Slot; 1282. First anti-rotation part; 1283. Center hole; 129. Pin; 13. Cover plate; 131. Socket; 132. Electrical connector; 14. Pilot air intake channel; 15. First pilot air outlet. 16. Air passage; 17. Second pilot air passage; 18. Sealing ring; 19. Protective structure; 10. First protective cover; 11. Strip groove; 12. Second protective cover; 13. Elastic locking foot; 14. Second anti-rotation part; 20. Pilot seat; 31. Valve body; 32. Air inlet P; 33. Working port A; 34. Working port B; 35. Exhaust port R; 36. Exhaust port S; 37. First exhaust port; 38. Second exhaust port; 39. Pilot air inlet; 30. Piston chamber; 41. Seal; 42. First sealing part; 43. Second sealing part; 44. Third sealing part; 45. Fourth sealing part; 46. Fifth sealing part; 47. Sixth sealing part; 48. Seventh sealing part. Detailed Implementation

[0038] The invention will now be further described with reference to the accompanying drawings.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] like Figures 1-18 As shown, a dual-electro-controlled solenoid valve includes a pilot valve assembly 10, a pilot seat 20, and a valve body 30 connected in sequence, which constitute the basic structure of the present invention.

[0042] The pilot valve assembly 10 includes a pilot valve guide seat 11, a pilot valve group 12, and a cover plate 13. The pilot valve guide seat 11 is fixedly connected to the pilot seat 20. The pilot valve guide seat 11 has a mounting cavity 111 with an opening at the lower end. The pilot valve group 12 includes a first pilot valve 121 and a second pilot valve 122. The lower ends of the first pilot valve 121 and the second pilot valve 122 are respectively provided with power pins 123. The inner end of the cover plate 13 is provided with sockets 131 corresponding to the two power pins 123. 3. An electrical connector 132 is provided at the outer end for electrical connection with two sockets 131. A connection structure 124 is provided at the adjacent ends of the first pilot valve 121 and the second pilot valve 122. During assembly, the first pilot valve 121 and the second pilot valve 122 are pre-assembled into one unit through the connection structure 124. Then, the pre-assembled pilot valve assembly 12 is inserted into the mounting cavity 111. Finally, the cover plate 13 is fixedly connected to the pilot valve guide seat 11. At this time, the power pin 123 is automatically inserted into the corresponding socket 131.

[0043] The pilot valve assembly 12 is limited in the insertion direction perpendicular to the pilot valve assembly 12 by the cavity wall of the mounting cavity 111. The upper end face of the mounting cavity 111 cooperates with the cover plate 13 to limit the pilot valve assembly 12 in the insertion direction of the pilot valve assembly 12. Specifically, the pilot valve guide seat 11 is provided with a circumferentially arranged limiting rib 112 on the inner wall of the mounting cavity 111. The limiting rib 112 limits the pilot valve assembly 12 in the insertion direction perpendicular to the pilot valve assembly 12. A guide part 1121 is provided on the side of the limiting rib 112 near the opening. The guide part 1121 is used to guide the pilot valve assembly 12 into the mounting cavity 111.

[0044] The dual-electro-controlled solenoid valve of the present invention is easier and more efficient to assemble, and effectively ensures the air circuit sealing between the first pilot valve 121 and the second pilot valve 122. During assembly, the first pilot valve 121 and the second pilot valve 122 are pre-assembled into one unit through the connecting structure 124, and then the pre-assembled pilot valve assembly 12 is inserted into the mounting cavity 111. Finally, the cover plate 13 is fixedly connected to the pilot valve guide seat 11. At this time, the power pin 123 will automatically be inserted into the corresponding socket 131.

[0045] In some embodiments, the valve body 30, pilot seat 20, and pilot valve assembly 10 form a pilot inlet channel 14, a first pilot outlet channel 15, and a second pilot outlet channel 16. The solenoid valve can be an external pilot structure or an internal pilot structure. When the solenoid valve is an external pilot structure, the valve body 30 is separately provided with a pilot inlet port 38 communicating with the pilot inlet channel 14. When the solenoid valve is an internal pilot structure, the inlet port P38 is connected to the pilot inlet channel 14, the first pilot outlet channel 15 is connected to the right piston chamber 310 of the valve body 30, and the second pilot outlet channel 16 is connected to the left piston chamber 310 of the valve body 30. The side piston chamber 310 is connected. As an equivalent alternative, the first pilot air outlet passage 15 is connected to the left piston chamber 310, and the second pilot air outlet passage 16 is connected to the right piston chamber 310 of the valve body 30. A first sealing ring 125 is provided between the first pilot valve 121 and the second pilot valve 122, and between the second pilot valve 122 and the pilot valve guide seat 11, corresponding to the outer periphery of the pilot air inlet passage 14. A second sealing ring 126 is provided between the first pilot valve 121 and the second pilot valve 122, and between the second pilot valve 122 and the pilot valve guide seat 11, corresponding to the position of the first pilot air outlet passage 15. When the first pilot valve 121 and the second pilot valve 122 are pre-assembled as a single unit, the first sealing ring 125 and the second sealing ring 126 between the first pilot valve 121 and the second pilot valve 122 are sandwiched in the middle.

[0046] In some embodiments, the connection structure 124 is a plug-in structure, which includes a plug 1241 formed on one of the pilot valves and a slot 1242 disposed on the other pilot valve. The plug 1241 is provided in multiple sets, and the slot 1242 corresponds one-to-one with the plug 1241. The plug 1241 and the slot 1242 are plugged into each other to enable the first pilot valve 121 and the second pilot valve 122 to be pre-assembled side by side in the same manner.

[0047] In some embodiments, the pilot valve guide seat 11 is provided with an annular groove along the opening path on the outer periphery of the corresponding mounting cavity 111 opening, and a sealing ring 17 is installed in the annular groove. When the cover plate 13 is fixedly connected to the pilot valve guide seat 11, the sealing ring 17 is sandwiched between the cover plate 13 and the pilot valve guide seat 11.

[0048] In some embodiments, one end of the valve body 30 is provided with an air inlet P31, a working port A32, a working port B33, an exhaust port R34, an exhaust port S35, a first exhaust port 36, and a second exhaust port 37. The first exhaust port 36 is used to communicate with the exhaust channel of the manifold. An exhaust space is formed between the second exhaust port 37 and the manifold. The second exhaust port 37 is used to connect to the exhaust channel of the pilot valve and / or the exhaust channel of the piston chamber 310 of the solenoid valve body 30. A sealing element 40 is provided at one end of the valve body 30 for connecting to the manifold. The sealing element 40 includes an integrally formed first sealing part 41, a second sealing part 42, a third sealing part 43, a fourth sealing part 44, a fifth sealing part 45, a sixth sealing part 46, and a seventh sealing part 47. When the sealing element 40 is installed in the forward direction, the second sealing part 42... The first exhaust port 36 and the second exhaust port 37 are sealed. The third sealing part 43 seals the working port A32, the fourth sealing part 44 seals the air inlet P31, the fifth sealing part 45 seals the working port B33, the sixth sealing part 46 seals the exhaust port S35, and the seventh sealing part 47 surrounds the outer periphery of the second exhaust port 36 and the second exhaust port 37. At this time, the gas flowing out of the second exhaust port 37 flows through the first exhaust port 36 to the exhaust channel of the manifold. When the seal 40 is installed in reverse, the sixth sealing part 46 seals the exhaust port R34, the fifth sealing part 45 seals the working port A32, the fourth sealing part 44 seals the air inlet P31, the third sealing part 43 seals the working port B33, the second sealing part 42 seals the exhaust port S35, and the first sealing part 41 seals the first exhaust port 36. At this time, the gas flowing out of the second exhaust port 37 is directly discharged through the exhaust space.

[0049] In some embodiments, the exhaust port R34, working port A32, air inlet P31, working port B33, and exhaust port S35 are arranged in sequence, the first exhaust port 36 and the second exhaust port 37 are located at the other end of the exhaust port S35 relative to the working port B33, and the second exhaust port 37 is located at the lower end of the first exhaust port 36.

[0050] The dual-electro-controlled solenoid valve of the present invention can meet the requirements of different working conditions. When the seal 40 is installed in the forward direction, the pilot valve exhaust passage and / or the solenoid valve piston chamber 310 flow into the manifold through the second exhaust port 37 and the first exhaust port 36, and are collected and discharged through the exhaust passage of the manifold. When the seal 40 is installed in the reverse direction, the pilot valve exhaust passage and / or the solenoid valve piston chamber 310 flow into the second exhaust port 37, and are directly discharged through the exhaust space.

[0051] In some embodiments, a pilot air inlet 38 is provided on the other side of the exhaust port S35 opposite to the working port A32. Both the first sealing part 41 and the seventh sealing part 47 can be used to seal the pilot air inlet 38. When the sealing member 40 is installed in the forward direction, the seventh sealing part 47 can seal the first exhaust port 36 and the second exhaust port 37. When the sealing member 40 is installed in the reverse direction, the seventh sealing part 47 can seal the pilot air inlet 38. When the sealing member 40 is installed in the forward direction, the first sealing part 41 can seal the pilot air inlet 38. When the sealing member 40 is installed in the reverse direction, the first sealing part 41 can seal the first exhaust port 36.

[0052] In some embodiments, the first pilot valve 121 and the second pilot valve 122 are respectively provided with manual buttons 127, and the pilot valve guide seat 11 is provided with a dam 128 circumferentially covering the manual button 127. The upper end of the dam 128 is provided with a central hole 1283 corresponding to the position of the manual button 127. The pilot valve assembly 10 also includes a protective structure 18, which includes a first protective cover 181 or a second protective cover 182 that can be selectively installed on the dam 128. The cover surface of the first protective cover 181 is provided with a strip groove 1811, and the cover surface of the second protective cover 182 is a full-coverage structure. When the first protective cover 181 and the second protective cover 182 are not installed on the dam 128, a tool can be used to press down and rotate the manual button 127 through the central hole 1283 to keep the manual button 127 in the operating state; when the first protective cover 181 is installed on the dam 128, a tool can be used to press down the manual button 127 through the strip groove 1811, and after the pressure is released, the manual button 127 automatically returns to its original position; when the second protective cover 182 is installed on the dam 128, the central hole 1283 is folded by the cover surface of the second protective cover 182, thereby restricting the operation of the manual button 127.

[0053] In some embodiments, the first protective cover 181 and the second protective cover 182 are provided with elastic locking feet 183, and the dam 128 is provided with a locking groove 1281 that engages with the elastic locking feet 183.

[0054] In some embodiments, a first anti-rotation part 1282 is provided on the outer periphery of the dam 128, and the first protective cover 181 and the second protective cover 182 are provided with a second anti-rotation part 184 that matches the first anti-rotation part 1282. The first anti-rotation part 1282 and the second anti-rotation part 184 cooperate to restrict the rotation of the first protective cover 181 and the second protective cover 182 relative to the dam 128.

[0055] In some embodiments, the manual button 127 is provided with a vertical groove 1271 and a horizontal groove 1272 communicating with the upper end of the vertical groove 1271. The first pilot valve 121 and the second pilot valve 122 are provided with a pin 129 extending into the vertical groove 1271 or the horizontal groove 1272. In the initial state, the pin 129 is located at the bottom of the vertical groove 1271 so that the manual button 127 can be pressed down. Since the lower end of the manual button 127 is provided with a reset member, when the pressure is released, the manual button 127 will be reset upward under the action of the reset member. When the manual button 127 is pressed down and rotated, the pin 129 extends into the horizontal groove 1272 and is limited by the groove wall of the horizontal groove 1272, thereby keeping the manual button 127 in the operating state.

[0056] The dual-electro-controlled solenoid valve of the present invention is designed with two protective covers for different working conditions. Users can choose the appropriate protective cover according to different working conditions, so that the protective structure 18 is applicable to different working conditions. When the first protective cover 181 is used, the user can use a tool to press down the manual button 127 through the strip groove 1811. After the pressure is released, the manual button 127 automatically returns to its original position. When the second protective cover 182 is used, the second protective cover 182 can prevent the manual button 127 from being operated.

[0057] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A dual solenoid operated electromagnetic valve characterized by: The valve body (30), the pilot seat (20) and the pilot valve assembly (10) form a pilot inlet passage (14), a first pilot outlet passage (15) and a second pilot outlet passage (16), a first sealing ring (125) is arranged between the first pilot valve (121) and the second pilot valve (122) and between the second pilot valve (122) and the pilot valve guide seat (11) corresponding to the outer periphery of the pilot inlet passage (14), and a second sealing ring (126) is arranged between the first pilot valve (121) and the second pilot valve (122) and between the second pilot valve (122) and the pilot valve guide seat (11) corresponding to the position of the first pilot outlet passage (15).

2. A solenoid-operated valve according to claim 1, characterized in that: The connecting structure (124) is a plug-in structure, the plug-in structure includes a plug column (1241) formed on one of the pilot valves and a plug slot (1242) arranged on the other pilot valve, the plug column (1241) is provided with multiple groups, the plug slot (1242) corresponds to the plug column (1241) one by one, and the first pilot valve (121) and the second pilot valve (122) can be preassembled into one body in a transverse and parallel manner through plug-in cooperation of the plug column (1241) and the plug slot (1242).

3. A solenoid-operated electromagnetic valve according to claim 2, characterized in that: ​ 4. A solenoid-operated valve according to claim 1, wherein: The pilot valve guide seat (11) is provided with an annular groove arranged along the opening path at the outer periphery of the opening of the mounting cavity (111), and a sealing ring (17) is mounted in the annular groove, when the cover plate (13) is fixedly connected with the pilot valve guide seat (11), the sealing ring (17) is clamped between the cover plate (13) and the pilot valve guide seat (11).

5. A double solenoid valve according to any one of claims 1 to 4, characterized in that: The valve body (30) is provided with an air inlet P (31), a working port A (32), a working port B (33), an exhaust port R (34), an exhaust port S (35), a first exhaust port (36) and a second exhaust port (37), the first exhaust port (36) is used for communicating with the exhaust passage of the busbar, the second exhaust port (37) forms an exhaust space with the busbar, the second exhaust port (37) is used for communicating the pilot valve exhaust passage or / and the piston cavity (310) exhaust passage of the electromagnetic valve valve body (30), the valve body (30) is provided with a sealing element (40) at one end for connecting the busbar, the sealing element (40) includes a first sealing part (41), a second sealing part (42), a third sealing part (43), a fourth sealing part (44), a fifth sealing part (45), a sixth sealing part (46) and a seventh sealing part (47) which are integrally formed, when the sealing element (40) is installed in the normal direction, the second sealing part (42) seals the exhaust port R (34), the third sealing part (43) seals the working port A (32), the fourth sealing part (44) seals the air inlet P (31), the fifth sealing part (45) seals the working port B (33), the sixth sealing part (46) seals the exhaust port S (35), and the seventh sealing part (47) surrounds the outer periphery of the first exhaust port (36) and the second exhaust port (37), at this time, the gas flowing out of the second exhaust port (37) flows to the exhaust passage of the busbar through the first exhaust port (36); when the sealing element (40) is installed in the reverse direction, the sixth sealing part (46) seals the exhaust port R (34), the fifth sealing part (45) seals the working port A (32), the fourth sealing part (44) seals the air inlet P (31), the third sealing part (43) seals the working port B (33), the second sealing part (42) seals the exhaust port S (35), and the first sealing part (41) seals the first exhaust port (36), at this time, the gas flowing out of the second exhaust port (37) is directly discharged through the exhaust space.

6. A solenoid-operated electromagnetic valve of claim 5 wherein: The exhaust port R (34), the working port A (32), the air inlet P (31), the working port B (33) and the exhaust port S (35) are arranged in sequence, the first exhaust port (36) and the second exhaust port (37) are arranged at the other end of the exhaust port S (35) relative to the working port B (33), and the second exhaust port (37) is arranged at the lower end of the first exhaust port (36).

7. A solenoid-operated electromagnetic valve according to claim 6, characterized in that: The exhaust port S (35) is provided with a pilot air inlet (38) on the other side relative to the working port A (32), and the first sealing part (41) and the seventh sealing part (47) can be used to seal the pilot air inlet (38).

8. A solenoid-operated electromagnetic valve of claim 1, wherein: The first pilot valve (121) and the second pilot valve (122) are respectively provided with a manual button (127), the pilot valve guide base (11) is provided with a dam (128) which circumferentially covers the manual button (127), a center hole (1283) is arranged on the upper end of the dam (128) corresponding to the position of the manual button (127), the pilot valve assembly (10) further comprises a protection structure (18), the protection structure (18) comprises a first protection cover (181) or a second protection cover (182) which are selectively mounted on the dam (128), the cover surface of the first protection cover (181) is provided with a strip-shaped groove (1811), and the cover surface of the second protection cover (182) is a full shielding structure; when the first protection cover (181) and the second protection cover (182) are not mounted on the dam (128), the manual button (127) can be pressed down and rotated through the center hole (1283) by using a tool, so that the manual button (127) remains in an operating state; when the first protection cover (181) is mounted on the dam (128), the manual button (127) can be pressed down through the strip-shaped groove (1811) by using a tool, and the manual button (127) is automatically returned after the pressing force is removed; when the second protection cover (182) is mounted on the dam (128), the center hole (1283) is folded by the cover surface of the second protection cover (182), so that the manual button (127) is limited to be operated.

9. A solenoid-operated electromagnetic valve according to claim 8, characterized in that: The first protection cover (181) and the second protection cover (182) are provided with elastic clamping legs (183), and the dam (128) is provided with clamping grooves (1281) which are clamped and matched with the elastic clamping legs (183).

10. A solenoid-operated electromagnetic valve according to claim 8, characterized in that: The outer periphery of the dam (128) is provided with a first rotation-stopping part (1282), and the first protection cover (181) and the second protection cover (182) are provided with second rotation-stopping parts (184) which are matched with the first rotation-stopping part (1282), so that the first protection cover (181) and the second protection cover (182) are limited to rotate relative to the dam (128) through the cooperation of the first rotation-stopping part (1282) and the second rotation-stopping part (184).

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