An electro-pneumatic combination valve device for use in underground coal mines

Abstract

This invention discloses an electro-pneumatic combined valve device for underground coal mines, relating to the field of coal mine transportation electrical control technology. It includes a valve plate, multiple pneumatic valves, and multiple electrical control components. The valve plate is provided with independent air inlets, a first return airway, and a second return airway. The air inlets are used to introduce control air. The air inlets of each pneumatic valve are connected to the air inlets, and the first and second air outlets of each pneumatic valve are connected to their corresponding actuating components. Each first return airway and each second return airway are respectively connected to the first and second return airways. The multiple electrical control components are connected to the multiple pneumatic valves, and the electrical control components can control the operation of the corresponding pneumatic valves, connecting the air inlet to the first air outlet and the second air outlet to the first return airway, or connecting the air inlet to the second air outlet and the first air outlet to the second return airway. The electro-pneumatic combined valve device for underground coal mines provided by this invention integrates and realizes combined control of multiple actuating components, improving intelligence and integration.

Description

Technical Field

[0001] This invention relates to the field of electrical control technology for coal mine transportation, and in particular to an electrically controlled pneumatic combination valve device for use in underground coal mines. Background Technology

[0002] With the modernization of underground coal mines and the requirements for building inherently safe and green coal mines, various types of trackless auxiliary transportation equipment with different functions have emerged under the guidance of the policy of reducing manpower through mechanization, improving quality through automation, and increasing efficiency through intelligence.

[0003] Trackless auxiliary transportation equipment in coal mines has achieved good economic and social benefits in terms of reducing manpower, increasing efficiency, and improving safety, effectively solving the bottleneck restricting the development of safe and efficient mines in my country. With the gradual advancement of "mechanization replacing manpower, automation reducing manpower, and intelligent unmanned operation" in underground coal mines, unmanned driving in coal mines is gradually being valued by large coal mines. With the continuous advancement of intelligent construction of trackless auxiliary transportation equipment in underground coal mines, electrical components are playing an increasingly important role, especially in the field of combining electrical and hydraulic systems, where the technical level is constantly improving, and electro-hydraulic control technology is developing rapidly and being widely used in underground coal mines. Pneumatic systems play an important role in coal mining equipment in underground mines; however, the technology for combining pneumatic and electrical systems is currently relatively backward, lacking combined control valves for the motion control of multiple components on transportation equipment, and the level of intelligence and integration is low. Summary of the Invention

[0004] The purpose of this invention is to provide an electro-pneumatic combination valve device for use in underground coal mines, so as to solve the problems existing in the prior art, integrate and realize the combined control of multiple action components, and improve intelligence and integration.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides an electro-pneumatic combination valve device for use in coal mines, comprising a valve plate, multiple pneumatic valves arranged side-by-side on the valve plate, and multiple electro-control components. The valve plate has an independent air inlet, a first return airway, and a second return airway, the air inlet being used to introduce control gas. Each pneumatic valve has an air inlet, a first air outlet, a second air outlet, a first return airway, and a second return airway. Each air inlet is connected to the air inlet, and the first and second air outlets of each pneumatic valve are connected to corresponding actuating components. Each first and second return airway is connected to the first and second return airways, respectively. Multiple electro-control components are connected to the multiple pneumatic valves, and each electro-control component can control the operation of the corresponding pneumatic valve to connect the air inlet to the first air outlet and the second air outlet to the first return airway, or to connect the air inlet to the second air outlet and the first air outlet to the second return airway.

[0007] Preferably, each of the pneumatic valves includes a housing and a valve core. The housing has an air chamber, and the valve core is slidably and sealingly connected to the air chamber. The housing has an air inlet, a first air outlet, a second air outlet, a first air return port, and a second air return port communicating with the air chamber. The valve core has a gas channel, and one end of the valve core can extend out of the housing and be connected to the electronic control component. The electronic control component can control the valve core to slide relative to the air chamber, so that the air inlet and the second air outlet are respectively connected to the first air outlet and the first air return port through the gas channel, or so that the air inlet and the first air outlet are respectively connected to the second air outlet and the second air return port through the gas channel.

[0008] Preferably, the gas passage includes an independent first gas passage and a second gas passage; the positions of the first gas passage and the second gas passage can move synchronously with the valve core, so that the air inlet and the first air outlet are connected through the first gas passage, and the second air outlet and the first return air outlet are connected through the second gas passage, or so that the air inlet and the second air outlet are connected through the second gas passage, and the first air outlet and the second return air outlet are connected through the first gas passage.

[0009] Preferably, the housing has a first air outlet and a second air outlet on one side, parallel to the axial direction and away from the inner end of the air chamber; the housing has a second return air port, an air inlet, and a first return air port on the side opposite to the valve plate, parallel to the axial direction and away from the inner end of the air chamber; the first channel and the second channel are distributed along the axial direction of the valve core, and the first channel is close to the inner end of the air chamber; the valve core sidewall has a plurality of connecting holes that communicate with the first air passage or the second air passage; during the movement of the valve core relative to the air chamber, the air inlet, the first air outlet, the second air outlet, the first return air port, and the second return air port can communicate with the first air passage or the second air passage through the corresponding connecting holes.

[0010] Preferably, each of the pneumatic valves further includes a reset assembly, which is disposed between the inner end of the air chamber and the end of the valve core. The electronic control assembly can drive the valve core to move in the direction of extending into the air chamber and can cause the reset assembly to undergo elastic deformation. The valve core can move in the direction of withdrawing from the air chamber under the restoring force of the reset assembly.

[0011] Preferably, the reset assembly includes a pressure block and a reset spring, one end of the pressure block abutting against the end of the valve core, and the reset spring elastically supporting the pressure block between the pressure block and the inner end of the air chamber.

[0012] Preferably, the housing includes a first cover, a housing body, and a second cover that are detachably connected in sequence along the axial direction. The housing body has the air cavity along the axial direction, and the side wall of the housing body has the air inlet, the first air outlet, the second air outlet, the first air return port, and the second air return port. The valve core can pass through the first cover and can extend into the air cavity.

[0013] Preferably, the portion of the valve core located within the first cover body has a coarse-diameter section, the diameter of which is larger than the inner diameter of the air chamber; sealing rings are provided between the outer periphery of the coarse-diameter section and the first cover body, and between the outer periphery of the valve core within the air chamber and the air chamber.

[0014] Preferably, each of the electronic control components includes an electronically controlled valve and a manual pressing component connected to the portion of the corresponding valve core that extends out of the air chamber. Both the electronically controlled valve and the manual pressing component are capable of controlling the sliding of the valve core relative to the air chamber.

[0015] Preferably, the electronic control component and the corresponding pneumatic valve are detachably connected.

[0016] The present invention achieves the following technical effects compared to the prior art:

[0017] The electro-pneumatic combination valve device for underground coal mines provided by this invention integrates multiple pneumatic valves onto a valve plate. The first and second air outlets of the pneumatic valves are respectively connected to the two cylinder ports of the corresponding actuators, such as cylinders. The valve plate has independent inlet channels, a first return channel, and a second return channel. The inlet channel connects to the inlet of each pneumatic valve to allow air intake. The first and second return ports on each pneumatic valve are respectively connected to the first and second return channels. Under the control of the electro-control component, the corresponding pneumatic valves are activated, connecting the inlet to the first outlet and the second outlet to the first return port, allowing gas to flow through. The gas enters the actuator through the first outlet and drives the actuator to move. The gas inside the actuator can flow through the second outlet to the first return outlet and enter the first return air passage. Alternatively, under the control of the electronic control component, the inlet and the second outlet are connected, and the first outlet and the second return outlet are connected. In this case, the gas enters the actuator through the second outlet and drives the actuator to move in the opposite direction. The gas inside the actuator can flow through the first outlet to the second return outlet and enter the second return air passage. This enables bidirectional movement of the actuator. By integrating and setting up multiple actuators for combined control, the intelligence and integration are improved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 An isometric view of the electro-pneumatic combination valve device for underground coal mines provided in Example 1;

[0020] Figure 2 for Figure 1 The front view;

[0021] Figure 3 for Figure 2 Top view;

[0022] Figure 4 for Figure 2 Side view;

[0023] Figure 5 This is a schematic diagram of the pneumatic valve provided in Embodiment 1;

[0024] Figure 6 An isometric view of the valve plate provided in Example 1;

[0025] Figure 7 A connection diagram of the electrically controlled pneumatic combination valve device for underground coal mines provided in Embodiment 1;

[0026] Figure 8 This is a schematic diagram of the valve core provided in Example 1.

[0027] In the diagram: 1-Valve plate; 11-Inlet; 12-First return air passage; 13-Second return air passage; 14-Sealing head; 2-Pneumatic valve; 21-Inlet; 22-First outlet; 23-Second outlet; 24-First return air port; 25-Second return air port; 26-Housing shell; 261-First cover; 262-Housing body; 263-Second cover; 264-Air chamber; 27-Valve core; 271-First air passage; 272-Second air passage; 273-Rough diameter section; 274-Sealing ring; 28-Reset assembly; 281-Pressure block; 282-Reset spring; 3-Electrical control assembly; 31-Electrical control valve; 32-Manual pressing component. Detailed Implementation

[0028] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The purpose of this invention is to provide an electro-pneumatic combination valve device for use in underground coal mines, so as to solve the problems existing in the prior art, integrate and realize the combined control of multiple action components, and improve intelligence and integration.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] This embodiment provides an electrically controlled pneumatic combination valve device for use in underground coal mines. Please refer to [link / reference]. Figures 1-7The system includes a valve plate 1, multiple pneumatic valves 2 arranged side-by-side on the valve plate 1, and multiple electronic control components 3. The valve plate 1 is provided with an independent air inlet 11, a first air return 12, and a second air return 13. The air inlet 11 is used to introduce control air. Each pneumatic valve 2 is provided with an air inlet 21, a first air outlet 22, a second air outlet 23, a first air return 24, and a second air return 25. Each air inlet 21 is connected to the air inlet 11, and the first air outlet 22 and the second air outlet of each pneumatic valve 2 are connected to each other. 23 are all connected to the corresponding actuating components; each first return air port 24 and each second return air port 25 are respectively connected to the first return air passage 12 and the second return air passage 13; multiple electronic control components 3 are respectively connected to multiple pneumatic valves 2, and the electronic control components 3 can control the corresponding pneumatic valves 2 to operate so that the air inlet 21 is connected to the first air outlet 22 and the second air outlet 23 is connected to the first return air port 24, or so that the air inlet 21 is connected to the second air outlet 23 and the first air outlet 22 is connected to the second return air port 25.

[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, multiple pneumatic valves 2 are integrated on a valve plate 1. The first air outlet 22 and the second air outlet 23 of the pneumatic valve 2 are respectively connected to the two cylinder ports of the corresponding actuator, such as a cylinder. The valve plate 1 has an independent air inlet 11, a first air return 12, and a second air return 13. Figure 6 The air intake duct 11 is connected to the air intake port 21 of each pneumatic valve 2 to achieve air intake. The first return air port 24 and the second return air port 25 on each pneumatic valve 2 are respectively connected to the first return air duct 12 and the second return air duct 13. Under the control of the electronic control component 3, the corresponding pneumatic valve 2 is activated so that the air intake port 21 is connected to the first air outlet 22, and the second air outlet 23 is connected to the first return air port 24. Figure 5 As shown, at this time, the gas enters the actuator through the first outlet 22 and drives the actuator to move. The gas in the actuator can flow through the second outlet 23 to the first return outlet 24 and enter the first return air passage 12. Alternatively, under the control of the electronic control component 3, the inlet 21 is connected to the second outlet 23, and the first outlet 22 is connected to the second return outlet 25. At this time, the gas enters the actuator through the second outlet 23 and drives the actuator to move in the opposite direction. The gas in the actuator can flow through the first outlet 22 to the second return outlet 25 and enter the second return air passage 13. This enables bidirectional movement of the actuator. By integrating and realizing the combined control of multiple actuators, the intelligence and integration are improved. When the first return air passage 12 is connected to the working passage, the two ends of the second return air passage 13 are blocked by the sealing head 14. Usually, a silencer is installed at the outlet of the first return air passage 12 to make the gas outlet smooth and quiet. Conversely, the two ends of the first return air passage 12 are blocked by the sealing head 14.

[0034] In the optional solutions of this embodiment, a more preferred option is described in the following description: Figure 5 Each pneumatic valve 2 includes a housing 26 and a valve core 27. The housing 26 has an air chamber 264. The valve core 27 is slidably and sealingly connected to the air chamber 264. The housing 26 has an air inlet 21, a first air outlet 22, a second air outlet 23, a first return air outlet 24, and a second return air outlet 25 communicating with the air chamber 264. The valve core 27 has a gas passage. One end of the valve core 27 can extend out of the housing 26 and connect to the electronic control assembly 3. The electronic control assembly 3 can control the sliding of the valve core 27 relative to the air chamber 264. The air inlet 21 and the second air outlet 23 are connected to the first air outlet 22 and the first air return port 24 respectively through the gas channel, or the air inlet 21 and the first air outlet 22 are connected to the second air outlet 23 and the second air return port 25 respectively through the gas channel; by setting the valve core 27 and the gas chamber 164 to slide and seal, the air inlet 21, the first air outlet 22, the second air outlet 23, the first air return port 24 and the second air return port 25 are connected to the gas channel to realize the flow of gas in different directions.

[0035] In the optional scheme of this embodiment, more preferably, the gas channel includes an independent first air passage 271 and a second air passage 272; the positions of the first air passage 271 and the second air passage 272 can move synchronously with the valve core 27, so that the air inlet 21 and the first air outlet 22 are connected through the first air passage 271, and the second air outlet 23 and the first return air outlet 24 are connected through the second air passage 272, or the air inlet 21 and the second air outlet 23 are connected through the second air passage 272, and the first air outlet 22 and the second return air outlet 25 are connected through the first air passage 271; wherein the first air passage 271 and the second air passage 272 are set independently to avoid disorder caused by the connection of air inlet and return.

[0036] In a preferred embodiment, the housing 26 has a first air outlet 22 and a second air outlet 23 on one side, parallel to the axial direction and away from the inner end of the air chamber 264. The housing 26 opposite to the valve plate 1 has a second return air port 25, an air inlet 21, and a first return air port 24 on the side parallel to the axial direction and away from the inner end of the air chamber 264. The first air passage 271 and the second passage are distributed along the axial direction of the valve core 27, with the first air passage 271 close to the inner end of the air chamber 264. The valve core 27 has multiple connecting holes on its sidewall that communicate with the first air passage 271 or the second air passage 272. During the movement of the valve core 27 relative to the air chamber 264, the air inlet... 21. The first air outlet 22, the second air outlet 23, the first return air outlet 24, and the second return air outlet 25 can be connected to the first air passage 271 or the second air passage 272 through corresponding connecting holes. By setting multiple connecting holes, during the movement of the valve core 27, different connecting holes can be connected to the corresponding air inlet 21, the first air outlet 22, the second air outlet 23, the first return air outlet 24, or the second return air outlet 25 to achieve different gas directions. The position of the connecting holes should be specifically set according to the displacement of the valve core 27 and the position of each air outlet. The outer diameter of the valve core 27 can be consistent with the inner diameter of the air chamber 264, and the inner wall of the air chamber 264 can block the connecting holes in the non-connected state.

[0037] In an optional embodiment, more preferably, each pneumatic valve 2 further includes a reset assembly 28. The reset assembly 28 is disposed between the inner end of the air chamber 264 and the end of the valve core 27. The electronic control assembly 3 can drive the valve core 27 to move in the direction of extending into the air chamber 264 and can cause the reset assembly 28 to undergo elastic deformation. The valve core 27 can move in the direction of withdrawing from the air chamber 264 under the restoring force of the reset assembly 28. By setting the reset assembly 28, the automatic reset of the valve core 27 can be realized. The electronic control assembly 3 only needs to control the valve core 27 from its initial state as follows: Figure 5 As shown, it begins to extend into the gas chamber 264 to change the direction of gas flow; and after the electronic control component 3 loses control, the valve core 27 automatically resets under the action of the reset component 28.

[0038] In the optional embodiment, more preferably, the reset assembly 28 includes a pressure block 281 and a reset spring 282. One end of the pressure block 281 abuts against the end of the valve core 27, and the reset spring 282 is elastically supported between the pressure block 281 and the inner end of the air chamber 264. The pressure block 281 is set to facilitate the stable force transmission between it and the valve core 27, and the valve core 27 is automatically reset through the elastic deformation of the reset spring 282.

[0039] In the optional embodiment, more preferably, the housing 26 includes a first cover 261, a housing body 262, and a second cover 263 that are detachably connected in sequence along the axial direction. The first cover 261, the housing body 262, and the second cover 263 are detachably connected by bolts, which facilitates installation and disassembly. The housing body 262 has an air chamber 264 along the axial direction. The side wall of the housing body 262 has an air inlet 21, a first air outlet 22, a second air outlet 23, a first air return port 24, and a second air return port 25. The valve core 27 can pass through the first cover 261 and extend into the air chamber 264. The part of the valve core 27 that extends out of the first cover 261 is connected to the electronic control component 3.

[0040] In the optional solutions of this embodiment, a more preferred option is described in the following description: Figure 8 The portion of the valve core 27 placed inside the first cover 261 is provided with a coarse diameter section 273. The diameter of the coarse diameter section 273 is larger than the inner diameter of the air chamber 264. The coarse diameter section 273 facilitates the limiting of the valve core 27. A sealing ring 274 is provided between the outer periphery of the coarse diameter section 273 and the first cover 261, and between the outer periphery of the valve core 27 inside the air chamber 264 and the air chamber 264, to improve the dustproof sealing between the valve core 27 and the air chamber 264.

[0041] In the optional embodiments of this example, more preferably, each electronic control component 3 includes an electronically controlled valve 31 and a manual pressing component 32 connected to the portion of the corresponding valve core 27 extending out of the air chamber 264. Both the electronically controlled valve 31 and the manual pressing component 32 can control the sliding of the valve core 27 relative to the air chamber 264. By setting the electronically controlled valve 31 and the manual pressing component 32, manual reversal can be performed in the power-off state, improving flexibility. Specifically, the electronically controlled valve 31 is set as an explosion-proof solenoid valve, which is detachably connected to the first cover 261 by bolts. The explosion-proof solenoid valve uses electromagnetic force in the energized state to drive the valve core to move. The manual pressing component 32, such as a button or a reset valve, can be threaded to the end of the valve core 27, and the valve core 27 can be moved by manual pressing.

[0042] In the optional scheme of this embodiment, more preferably, the electronic control component 3 and the corresponding pneumatic valve 2 can be detachably connected. Specifically, the electronic control valve 31 is detachably connected to the first cover 261 by bolts, and the manual pressing component 32, such as a button or a reset valve, can be threaded to the end of the valve core 27 for easy installation and disassembly.

[0043] Taking nine pneumatic valves as an example, the working principle of the explosion-proof electro-pneumatic combination valve device provided in this embodiment is explained as follows: For ease of description, the numbers from left to right in the figure are 1 to 9. The air inlet 21 is port P, the first air outlet 22 is port A, the second air outlet 23 is port B, the first return air outlet 24 is port S, and the second return air outlet is port R. Correspondingly, Figure 7In the diagram, the intake duct 11 is also represented by P, the first return air duct 12 is represented by S, and the second return air duct 13 is represented by R;

[0044] When a suitable pressure air source enters the air inlet 11 inside the valve plate 1, it is simultaneously connected to ports P1, P2, P3, P4, P5, P6, P7, P8, and P9 of the pneumatic valve 2, from... Figure 5 It can be seen that at this time, the P port of each pneumatic valve 2 is connected to the A port, that is, in the combination valve, the P1 port is connected to the A1 port, the P2 port is connected to the A2 port, the P3 port is connected to the A3 port, the P4 port is connected to the A4 port, the P5 port is connected to the A5 port, the P6 port is connected to the A6 port, the P7 port is connected to the A7 port, the P8 port is connected to the A8 port, and the P9 port is connected to the A9 port; the first return air passage 12 of the valve plate 1 is connected to the S1 port and the S2 port of the pneumatic valve 2. Ports S1, S2, S3, S4, S5, S6, S7, S8, and S9 are connected. At this time, the S port of each pneumatic valve 2 is connected to the B port. That is, in the combination valve, the S1 port is connected to the B1 port, the S2 port is connected to the B2 port, the S3 port is connected to the B3 port, the S4 port is connected to the B4 port, the S5 port is connected to the B5 port, the S6 port is connected to the B6 port, the S7 port is connected to the B7 port, the S8 port is connected to the B8 port, and the S9 port is connected to the B9 port.

[0045] In the natural state, i.e., when each solenoid valve 31 is not energized, in the combination valve, ports P1 and A1 are connected, P2 and A2 are connected, P3 and A3 are connected, P4 and A4 are connected, P5 and A5 are connected, P6 and A6 are connected, P7 and A7 are connected, P8 and A8 are connected, and P9 and A9 are connected. In the combination valve, ports S1 and B1 are connected, S2 and B2 are connected, S3 and B3 are connected, S4 and B4 are connected, S5 and B5 are connected, S6 and B6 are connected, S7 and B7 are connected, S8 and B8 are connected, and S9 and B9 are connected. Figure 8 As shown, at this time, the A port and B port of each pneumatic valve 2 can be connected to their respective actuators through air pipes, so that the actions of their respective actuators can be controlled.

[0046] When one or all of the solenoid valves 31 need to be energized, the electromagnet inside the solenoid valve 31 is activated. The electromagnet pushes the valve core 27 downward, so that the P port of the pneumatic valve 2 is connected to the B port and the R port is connected to the A port. That is, in the combination valve, the P1 port is connected to the B1 port, the P2 port is connected to the B2 port, the P3 port is connected to the B3 port, the P4 port is connected to the B4 port, the P5 port is connected to the B5 port, the P6 port is connected to the B6 port, the P7 port is connected to the B7 port, the P8 port is connected to the B8 port, and the P9 port is connected to the B9 port; in the combination valve, the R1 port is connected to the A1 port, the R2 port is connected to the A2 port, the R3 port is connected to the A3 port, the R4 port is connected to the A4 port, the R5 port is connected to the A5 port, the R6 port is connected to the A6 port, the R7 port is connected to the A7 port, the R8 port is connected to the A8 port, and the R9 port is connected to the A9 port. The second return air passage 13 of valve plate 1 is connected to ports R1, R2, R3, R4, R5, R6, R7, R8, and R9 of pneumatic valve 2; in this way, the actions of their respective actuators can be controlled.

[0047] When one or all of the solenoid valves 31 lose power, the electromagnet inside the solenoid valve 31 resets, and the valve core 27 moves upward under the push of the reset spring 282, and the pneumatic valve 2 returns to its natural state.

[0048] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A combination electro-pneumatic valve device for use in underground coal mines, characterized in that: include: Valve plate (1), the valve plate (1) is provided with independent air intake channel (11), first air return channel (12) and second air return channel (13), the air intake channel (11) is used to introduce control air; Multiple pneumatic valves (2) are arranged side by side on the valve plate (1). Each pneumatic valve (2) is provided with an air inlet (21), a first air outlet (22), a second air outlet (23), a first return air outlet (24), and a second return air outlet (25). Each air inlet (21) is connected to the air inlet channel (11). The first air outlet (22) and the second air outlet (23) of each pneumatic valve (2) are connected to the corresponding actuating component. Each first return air outlet (24) and each second return air outlet (25) are respectively connected to the first return air channel (12) and the second return air channel (13). Multiple electronic control components (3) are connected to multiple pneumatic valves (2) respectively. The electronic control components (3) can control the corresponding pneumatic valves (2) to operate so that the air inlet (21) is connected to the first air outlet (22) and the second air outlet (23) is connected to the first return air outlet (24), or so that the air inlet (21) is connected to the second air outlet (23) and the first air outlet (22) is connected to the second return air outlet (25). Each of the pneumatic valves (2) includes a housing (26) and a valve core (27). The housing (26) has an air chamber (264) inside. The valve core (27) is slidably and sealingly connected to the air chamber (264). The housing (26) has an air inlet (21), a first air outlet (22), a second air outlet (23), a first air return port (24), and a second air return port (25) communicating with the air chamber (264). The valve core (27) has a gas passage inside. One end of the valve core (27) can extend... Out of the housing (26) and connected to the electronic control component (3), the electronic control component (3) can control the valve core (27) to slide relative to the air chamber (264) so ​​that the air inlet (21) and the second air outlet (23) are connected to the first air outlet (22) and the first air return port (24) respectively through the gas channel, or so that the air inlet (21) and the first air outlet (22) are connected to the second air outlet (23) and the second air return port (25) respectively through the gas channel.

2. The electro-pneumatic combination valve device for underground coal mines according to claim 1, characterized in that: The gas passage includes an independent first gas passage (271) and a second gas passage (272); the positions of the first gas passage (271) and the second gas passage (272) can move synchronously with the valve core (27) so that the air inlet (21) and the first air outlet (22) are connected through the first gas passage (271), and the second air outlet (23) and the first return air outlet (24) are connected through the second gas passage (272), or so that the air inlet (21) and the second air outlet (23) are connected through the second gas passage (272), and the first air outlet (22) and the second return air outlet (25) are connected through the first gas passage (271).

3. The electro-pneumatic combination valve device for underground coal mines according to claim 2, characterized in that: The housing (26) has a first air outlet (22) and a second air outlet (23) on one side, parallel to the axial direction and away from the inner end of the air chamber (264). The housing (26) opposite the valve plate (1) has a second air return port (25), an air inlet (21), and a first air return port (24) on the side parallel to the axial direction and away from the inner end of the air chamber (264). The first air passage (271) and the second air passage (272) are distributed along the axial direction of the valve core (27), and the first air passage (… 271) Close to the inner end of the air chamber (264); the valve core (27) has a plurality of communication holes on its side wall that communicate with the first air passage (271) or the second air passage (272). During the movement of the valve core (27) relative to the air chamber (264), the air inlet (21), the first air outlet (22), the second air outlet (23), the first air return port (24) and the second air return port (25) can communicate with the first air passage (271) or the second air passage (272) through the corresponding communication holes.

4. The electro-pneumatic combination valve device for underground coal mines according to claim 1, characterized in that: Each of the pneumatic valves (2) further includes a reset assembly (28), which is disposed between the inner end of the air chamber (264) and the end of the valve core (27). The electronic control assembly (3) can drive the valve core (27) to move in the direction of extending into the air chamber (264) and can cause the reset assembly (28) to undergo elastic deformation. The valve core (27) can move in the direction of withdrawing from the air chamber (264) under the restoring force of the reset assembly (28).

5. The electro-pneumatic combination valve device for underground coal mines according to claim 4, characterized in that: The reset assembly (28) includes a pressure block (281) and a reset spring (282). One end of the pressure block (281) abuts against the end of the valve core (27), and the reset spring (282) is elastically supported between the pressure block (281) and the inner end of the air chamber (264).

6. The electro-pneumatic combination valve device for underground coal mines according to claim 1, characterized in that: The housing (26) includes a first cover (261), a housing body (262), and a second cover (263) that can be detachably connected in sequence along the axial direction. The housing body (262) has the air chamber (264) along the axial direction. The side wall of the housing body (262) has the air inlet (21), the first air outlet (22), the second air outlet (23), the first air return port (24), and the second air return port (25). The valve core (27) can pass through the first cover (261) and can extend into the air chamber (264).

7. The electro-pneumatic combination valve device for underground coal mines according to claim 6, characterized in that: The portion of the valve core (27) placed inside the first cover (261) is provided with a coarse diameter section (273), the diameter of which is larger than the inner diameter of the air chamber (264); a sealing ring (274) is provided between the outer periphery of the coarse diameter section (273) and the first cover (261) and between the outer periphery of the valve core (27) inside the air chamber (264) and the air chamber (264).

8. The electro-pneumatic combination valve device for underground coal mines according to claim 1, characterized in that: Each of the electronic control components (3) includes an electronically controlled valve (31) and a manual pressing element (32) connected to the portion of the corresponding valve core (27) extending out of the air chamber (264). Both the electronically controlled valve (31) and the manual pressing element (32) are capable of controlling the sliding of the valve core (27) relative to the air chamber (264).

9. The electro-pneumatic combination valve device for underground coal mines according to claim 1, characterized in that: The electronic control component (3) and the corresponding pneumatic valve (2) can be detachably connected.

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