Double-electric-control electromagnetic valve

Abstract

The double-electric-control electromagnetic valve comprises a pilot valve assembly, a pilot seat and a valve body, the pilot valve assembly comprises a pilot valve guide seat, a pilot valve set and a cover plate, the pilot valve guide seat is fixedly connected to the pilot seat, the pilot valve guide seat is provided with a mounting cavity with an opening in the lower end, and the pilot valve set comprises a first pilot valve and a second pilot valve; power pins are respectively arranged at the lower ends of the first pilot valve and the second pilot valve; the inner end of the cover plate is provided with sockets in one-to-one correspondence with the two power pins, the outer end of the cover plate is provided with electrical connectors electrically connected with the two sockets, and the adjacent ends of the first pilot valve and the second pilot valve are provided with connecting structures. When the double-electric-control electromagnetic valve is assembled, the pre-assembled pilot valve group is inserted into the mounting cavity, finally, the cover plate is fixedly connected with the pilot valve guide seat, the power pins are automatically inserted into the corresponding sockets at the moment, and through the arrangement, the double-electric-control electromagnetic valve is more convenient and efficient to assemble.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic valves, in particular to a double electric control electromagnetic valve. BACKGROUND

[0002] The electromagnetic valve is an industrial equipment controlled by electromagnetism, is an automation basic element for controlling fluid, belongs to an actuator, and is used in an industrial control system to adjust the direction, flow, speed and other parameters of medium. The pilot electromagnetic valve is a device for switching the action of a main valve through compressed air pressure, and belongs to a composite control system of electromagnetic control and air pressure control. The valve outputs pilot control air pressure through an electromagnetic pilot reversing valve, and pushes a main valve core to realize reversing function. According to the control mode, the valve can be divided into single electric control and double electric control, and according to the source of pilot pressure, the valve can be divided into internal pilot and external pilot.

[0003] The existing double electric control electromagnetic valve needs to assemble one of the pilot valves to the pilot seat first, then assemble the other pilot valve to the pilot seat, and finally connect the cover plate with the pilot valve one by one. The way of assembling the pilot valves one by one cannot guarantee the air path sealing between the two pilot valves, so it needs to be improved. In addition, the electromagnetic valve includes a valve body, a pilot seat and a pilot valve. The exhaust port R and the exhaust port S on the valve body are communicated with the exhaust passage of the busbar and exhaust through the exhaust passage of the busbar. The exhaust port of the pilot valve and / or the exhaust port of the valve rod piston cavity are generally directly exhausted outside, but in some special fields, such as semiconductor equipment, because semiconductor manufacturing needs to be carried out in a nearly "perfect" clean environment, the exhaust gas of the electromagnetic valve needs to be uniformly collected and discharged, so the existing electromagnetic valve needs to be improved to meet the needs of collection and discharge. SUMMARY

[0004] The purpose of the present application is to provide a double electric control electromagnetic valve, which is more convenient and efficient to assemble, and effectively guarantees the air path sealing between the first pilot valve and the second pilot valve.

[0005] The technical purposes are achieved by the following technical solutions: a double electric control electromagnetic valve, comprising a pilot valve assembly, a pilot seat and a valve body connected in sequence, the pilot valve assembly comprises 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 is provided with a mounting cavity with an open lower end, the pilot valve group comprises a first pilot valve and a second pilot valve, the first pilot valve and the second pilot valve are respectively provided with power supply feet at lower ends; the inner end of the cover plate is provided with sockets corresponding to the two power supply feet one by one, the outer end of the cover plate is provided with electrical connectors electrically connected with the two sockets, the adjacent ends of the first pilot valve and the second pilot valve are provided with connecting structures, during assembly, the first pilot valve and the second pilot valve are first pre-assembled into an integrated body through the connecting structures, then the pre-assembled pilot valve group is inserted into the mounting cavity, and finally the cover plate is fixedly connected with the pilot valve guide seat, at this time, the power supply feet are automatically inserted into the corresponding sockets, the pilot valve group is limited along the direction perpendicular to the insertion direction of the pilot valve group by the cavity wall of the mounting cavity, and the pilot valve group is limited along the insertion direction of the pilot valve group by the cooperation between the upper end surface of the mounting cavity and the cover plate.

[0006] Further, the valve body, the pilot seat and the pilot valve assembly are formed with a pilot inlet passage, a first pilot outlet passage and a second pilot outlet passage, a first sealing ring is arranged 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 inlet passage, and a second sealing ring is arranged 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 outlet passage.

[0007] Further, the connecting structure is a plug-in structure, the plug-in structure comprises a plug-in column formed on one of the pilot valves and a plug-in slot arranged on the other pilot valve, the plug-in column is provided with multiple groups, the plug-in slot corresponds to the plug-in column one by one, and the first pilot valve and the second pilot valve can be pre-assembled into an integrated body in a transverse and parallel manner through plug-in cooperation of the plug-in column and the plug-in slot.

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

[0009] Further, 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 communicate with the exhaust passage of the busbar, the second exhaust port forms an exhaust space with the busbar, the second exhaust port is used to communicate with the pilot valve exhaust passage or / and the piston cavity exhaust passage of the electromagnetic valve valve body, one end of the valve body used to connect the busbar is provided with a sealing element, the sealing element includes a 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 which are integrally formed, when the sealing element is installed in a normal direction, the second 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 covers the outer periphery of the first exhaust port and the second exhaust port, at this time, the gas flowing out of the second exhaust port flows to the exhaust passage of the busbar through the first exhaust port; when the sealing element is installed in a reverse direction, 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] Further, the exhaust port R, the working port A, the air inlet P, the working port B and the exhaust port S are arranged in sequence, the first exhaust port and the second exhaust port are arranged at the other end of the exhaust port S relative to the working port B, and the second exhaust port is arranged at the lower end of the first exhaust port.

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

[0012] Further, the first pilot valve and the second pilot valve are respectively provided with a manual button, the pilot valve guide seat is provided with a dam which circumferentially covers the manual button, the upper end of the dam is provided with a central hole corresponding to the position of the manual button, and the pilot valve assembly further includes a protection structure, the protection structure includes a first protection cover or a second protection cover which can be selectively installed on the dam, the cover surface of the first protection cover is provided with a strip-shaped groove, and the cover surface of the second protection cover is a full shielding structure; when the first protection cover and the second protection cover are not installed on the dam, the manual button can be pressed down and rotated through the central hole by using a tool to keep the manual button in an operating state; when the first protection cover is installed on the dam, the manual button can be pressed down by using a tool through the strip-shaped groove, and the manual button automatically returns after the pressing force is removed; when the second protection cover is installed on the dam, the central hole is folded by the cover surface of the second protection cover, thereby limiting the operation of the manual button.

[0013] Further, the first protective cover and the second protective cover are provided with elastic clamping feet, and the dam is provided with clamping grooves matched with the elastic clamping feet.

[0014] Further, a first rotation-stopping part is arranged on the outer periphery of the dam, and the first protective cover and the second protective cover are provided with a second rotation-stopping part matched with the first rotation-stopping part, so that the first protective cover and the second protective cover are limited to rotate relative to the dam through the cooperation of the first rotation-stopping part and the second rotation-stopping part.

[0015] In summary, the present application has the following advantages: 1. The double electric control electromagnetic valve is more convenient and efficient to assemble, and effectively ensures the air path sealing between the first pilot valve and the second pilot valve. 2. The double electric control electromagnetic valve can meet different working condition requirements. 3. The double electric control electromagnetic valve is designed with two protective covers for different working conditions, so that the user can select the appropriate protective cover according to different working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure schematic diagram when the pilot valve group of the present application is inserted into the installation cavity.

[0017] Figure 2 is an installation structure schematic diagram of the sealing ring of the present application.

[0018] Figure 3 is a sectional view of the present application.

[0019] Figure 4 is a schematic diagram of the connection structure of the present application.

[0020] Figure 5 is a sectional view when the electromagnetic valve of the present application is an inner pilot.

[0021] Figure 6 is a schematic diagram of the protective cover of the present application. Figure 5 is an enlarged view of A of the present application.

[0022] Figure 7 is a sectional view of the electromagnetic valve of the present application when the electromagnetic valve is externally piloted.

[0023] Figure 8 is a structural schematic view of the limiting rib of the present application.

[0024] Figure 9 is a structural schematic view of the seal of the present application when the seal is installed in a forward direction.

[0025] Figure 10 is a structural schematic view of the seal of the present application when the seal is installed in a reverse direction.

[0026] Figure 11 is a structural schematic view of the seal of the present application in a forward direction.

[0027] Figure 12 is a structural schematic view of the seal of the present application in a reverse direction.

[0028] Figure 13 is a structural schematic view of the installation of the present application when the first protective cover and the second protective cover are not installed.

[0029] Figure 14 is a structural schematic view of the installation of the first protective cover of the present application.

[0030] Figure 15 is a structural schematic view of the installation of the second protective cover of the present application.

[0031] Figure 16 is a structural schematic view of the first rotation-stopping portion and the second rotation-stopping portion of the present application.

[0032] Figure 17 is a schematic view of the protective structure of the present application.

[0033] Figure 18 is a structural schematic view of the manual button of the present application.

[0034] In the figure: 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 supply foot; 124, connecting structure; 1241, insertion column; 1242, insertion slot; 125, first sealing ring; 126, second sealing ring; 127, manual button; 1271, vertical slot; 1272, horizontal slot; 128, dam; 1281, clamping slot; 1282, first rotation-stopping part; 1283, center hole; 129, insertion pin; 13, cover plate; 131, socket; 132, electrical connector; 14, pilot inlet passage; 15, first pilot outlet passage; 16, second pilot outlet passage; 17, sealing ring; 18, protection structure; 181, first protective cover; 1811, strip-shaped slot; 182, second protective cover; 183, elastic clamping leg; 184, second rotation-stopping part; 20, pilot seat; 30, valve body; 31, inlet port P; 32, working port A; 33, working port B; 34, exhaust port R; 35, exhaust port S; 36, first exhaust port; 37, second exhaust port; 38, pilot inlet port; 310, piston cavity; 40, sealing member; 41, first sealing part; 42, second sealing part; 43, third sealing part; 44, fourth sealing part; 45, fifth sealing part; 46, sixth sealing part; 47, seventh sealing part. DETAILED DESCRIPTION

[0035] The present application will be further described below in conjunction with the accompanying drawings.

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0038] As Figures 1-18 shown, a double-electronic-control electromagnetic 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 application.

[0039] The pilot valve assembly 10 comprises a pilot valve guide base 11, a pilot valve group 12 and a cover plate 13, the pilot valve guide base 11 is fixedly connected to the pilot base 20, the pilot valve guide base 11 is provided with a mounting cavity 111 with an open lower end, the pilot valve group 12 comprises a first pilot valve 121 and a second pilot valve 122, the first pilot valve 121 and the second pilot valve 122 are respectively provided with power supply feet 123 at lower ends; the inner end of the cover plate 13 is provided with sockets 131 corresponding to the two power supply feet 123 one by one, the outer end of the cover plate 13 is provided with electrical connectors 132 electrically connected with the two sockets 131, the adjacent ends of the first pilot valve 121 and the second pilot valve 122 are provided with connecting structures 124, during assembly, the first pilot valve 121 and the second pilot valve 122 are first pre-assembled into an integrated unit through the connecting structures 124, then the pre-assembled pilot valve group 12 is inserted into the mounting cavity 111, and finally the cover plate 13 is fixedly connected with the pilot valve guide base 11, at this time, the power supply feet 123 are automatically inserted into the corresponding sockets 131.

[0040] The pilot valve group 12 is limited along the direction perpendicular to the insertion direction of the pilot valve group 12 by the cavity wall of the mounting cavity 111, and the pilot valve group 12 is limited along the insertion direction of the pilot valve group 12 by the upper end surface of the mounting cavity 111 cooperating with the cover plate 13, specifically, the pilot valve guide base 11 is provided with circumferentially arranged limiting ribs 112 corresponding to the inner wall of the mounting cavity 111, the limiting ribs 112 limit the pilot valve group 12 along the direction perpendicular to the insertion direction of the pilot valve group 12, and the limiting ribs 112 are provided with guide portions 1121 close to the opening side, the guide portions 1121 are used for guiding the pilot valve group 12 to enter into the mounting cavity 111.

[0041] The double-electronic-control electromagnetic valve of the application is more convenient and efficient to assemble, and effectively ensures the air path sealing property 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 first pre-assembled into an integrated unit through the connecting structures 124, then the pre-assembled pilot valve group 12 is inserted into the mounting cavity 111, and finally the cover plate 13 is fixedly connected with the pilot valve guide base 11, at this time, the power supply feet 123 are automatically inserted into the corresponding sockets 131.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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-electro-controlled solenoid valve, characterized in that: The system includes a pilot valve assembly (10), a pilot seat (20), and a valve body (30) connected in sequence. 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) and 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 first pilot valve (121) and the second pilot valve (122) are respectively provided with power pins (123) at their lower ends. The inner end of the cover plate (13) is provided with sockets (131) corresponding to the two power pins (123), and the outer end of the cover plate (13) is provided with electrical connectors (14) that are electrically connected to the two sockets (131). 32) The first pilot valve (121) and the second pilot valve (122) are provided with a connecting structure (124) at their adjacent ends. During assembly, the first pilot valve (121) and the second pilot valve (122) are pre-assembled into one unit through the connecting 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). The cavity wall of the mounting cavity (111) limits the pilot valve assembly (12) in the insertion direction perpendicular to the pilot valve assembly (12). 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).

2. The dual-electro-controlled solenoid valve according to claim 1, characterized in that: The valve body (30), pilot seat (20) and pilot valve assembly (10) form a pilot air intake channel (14), a first pilot air outlet channel (15) and a second pilot air outlet channel (16). 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 intake channel (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 channel (15).

3. The dual-electro-controlled solenoid valve according to claim 2, characterized in that: 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) provided on the other pilot valve. The plug (1241) is provided in multiple sets, and the slot (1242) corresponds to the plug (1241) one by one. The plug (1241) and the slot (1242) are plugged in to make the first pilot valve (121) and the second pilot valve (122) be pre-assembled side by side in the same horizontal position.

4. The dual-electro-controlled solenoid valve according to claim 1, characterized in that: 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). 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).

5. A dual-electro-controlled solenoid valve according to any one of claims 1-4, characterized in that: One end of 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 to connect 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 with the exhaust channel of the pilot valve and / or the exhaust channel of the piston chamber (310) of the solenoid valve body (30). The valve body (30) is provided with a sealing element (40) at one end 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) seals the exhaust port R (34). 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 through the first exhaust port (36) to the exhaust channel of the manifold; when the seal When component (40) is installed in reverse, 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 dual-electro-controlled solenoid valve according to claim 5, characterized in that: The exhaust port R (34), working port A (32), air inlet P (31), working port B (33), and exhaust port S (35) 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 S (35) relative to the working port B (33), and the second exhaust port (37) is located at the lower end of the first exhaust port (36).

7. A dual-electro-controlled solenoid 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 of the working port A (32), and the first sealing part (41) and the seventh sealing part (47) can both be used to seal the pilot air inlet (38).

8. A dual-electro-controlled solenoid valve according to claim 1, characterized in that: The first pilot valve (121) and the second pilot valve (122) are respectively provided with manual buttons (127). The pilot valve guide seat (11) is provided with a dam (128) that circumferentially covers 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). The protective structure (18) 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 fully shielded structure. When the dam is in the dam, the protective structure is fully shielded. 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 of the second protective cover (182), thereby restricting the operation of the manual button (127).

9. A dual-electro-controlled solenoid valve according to claim 8, characterized in that: 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).

10. A dual-electro-controlled solenoid valve according to claim 8, characterized in that: The outer periphery of the dam (128) is provided with a first anti-rotation part (1282), 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).

Images