Electric control gas combination valve device for underground coal mine

Abstract

The invention discloses a coal mine underground electric control gas combination valve device, which relates to the technical field of coal mine transportation electric control, and comprises a valve plate, a plurality of pneumatic valves and a plurality of electric control assemblies, an air inlet channel, a first air return channel and a second air return channel which are independent are arranged on the valve plate, and the air inlet channel is used for introducing control air; an air inlet of each pneumatic valve is communicated with the air inlet channel, and a first air outlet and a second air outlet of each pneumatic valve are communicated with the corresponding action part; each first air return port and each second air return port are respectively communicated with the first air return channel and the second air return channel; the multiple electric control assemblies are connected with the multiple pneumatic valves correspondingly, and the electric control assemblies can control the corresponding pneumatic valves to act, so that the air inlet communicates with the first air outlet, the second air outlet communicates with the first air return opening, or the air inlet communicates with the second air outlet, and the first air outlet communicates with the second air return opening. According to the electric control gas combination valve device for the underground coal mine, integrated arrangement is achieved, combined control over a plurality of action parts is achieved, and intelligence and integration degree are improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric control for coal mine transportation, and in particular to an electric control gas combination valve device for underground coal mines. Background Art

[0002] With the modernization of underground coal mines and the requirements for building intrinsically safe coal mines and green mining coal mines, under the guidance of the principle of mechanization to reduce manpower, automation to improve quality, and intelligence to increase efficiency, various types of trackless auxiliary transportation equipment have emerged in underground coal mines.

[0003] Trackless auxiliary transportation equipment in underground coal mines has achieved good economic and social benefits in reducing manpower and increasing efficiency, improving safety, etc., and has effectively solved the bottleneck that restricts the development of safe and efficient mines in my country; with the gradual advancement of "mechanized replacement, automated reduction, and intelligent unmanned" safety production in underground coal mines, unmanned driving in coal mines has gradually been taken seriously by large coal mines; with the continuous advancement of the intelligent construction of trackless auxiliary transportation equipment in underground coal mines, electrical components are playing an increasingly important role, especially in the field of the combination of electrical systems and hydraulic systems, the technical level is constantly improving, and electro-hydraulic control technology is rapidly developing and widely used in underground coal mines; pneumatic systems play an important role in coal mining equipment in underground coal mines, but the combination technology of pneumatic systems and electrical systems is currently relatively backward, lacking a combination control valve for the motion control of multiple components on transportation equipment, and has low intelligence and integration. Summary of the invention

[0004] The purpose of the present invention is to provide an electric-controlled gas combination valve device for use in coal mines to solve the problems existing in the above-mentioned prior art, integrate and realize the combined control of multiple action components, and improve intelligence and integration.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides an electric-controlled gas combination valve device for underground coal mines, comprising a valve plate, a plurality of pneumatic valves arranged side by side on the valve plate, and a plurality of electric-controlled components; an independent air inlet, a first air return duct and a second air return duct are arranged on the valve plate, and the air inlet is used to introduce control air; each of the pneumatic valves is provided with an air inlet, a first air outlet, a second air outlet, a first air return duct and a second air return duct, each of the air inlets is connected to the air inlet, and the first air outlet and the second air outlet of each of the pneumatic valves are connected to corresponding action components; each of the first air return duct and each of the second air return duct are respectively connected to the first air return duct and the second air return duct; a plurality of electric-controlled components are respectively connected to the plurality of pneumatic valves, and the electric-controlled components can control the corresponding pneumatic valve actions to make the air inlet connected to the first air outlet, the second air outlet connected to the first air return duct, or to make the air inlet connected to the second air outlet, the first air outlet connected to the second air return duct.

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

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

[0009] Preferably, the first air outlet and the second air outlet are provided on one side of the shell in a direction parallel to the axial direction and away from the inner end of the air cavity, and the second air return port, the air inlet and the first air return port are provided on the side of the shell opposite to the valve plate in a direction parallel to the axial direction and away from the inner end of the air cavity; 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 cavity; a plurality of connecting holes connected to the first air channel or the second air channel are provided on the side wall of the valve core, and during the movement of the valve core relative to the air cavity, the air inlet, the first air outlet, the second air outlet, the first air return port and the second air return port can be connected to the first air channel or the second air channel through the corresponding connecting holes.

[0010] Preferably, each of the pneumatic valves also includes a reset component, which is arranged between the inner end of the air cavity and the end of the valve core. The electronic control component can drive the valve core to move in the direction of extending into the air cavity and can cause the reset component to elastically deform. The valve core can move in the direction of being extracted from the air cavity under the action of the restoring force of the reset component.

[0011] Preferably, the reset assembly comprises a pressure block and a reset spring, one end of the pressure block abuts against the end of the valve core, and the reset spring is elastically supported between the pressure block and the inner end of the air cavity.

[0012] Preferably, the shell body axially includes a first cover body, a shell body and a second cover body which can be detachably connected in sequence, the shell body has the air cavity along the axial direction, and the shell body side wall 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 body and can extend into the air cavity.

[0013] Preferably, the portion of the valve core placed in the first cover body is provided with a large diameter section, the diameter of which is larger than the inner diameter of the air cavity; sealing rings are provided between the outer periphery of the large diameter section and the first cover body and between the outer periphery of the valve core in the air cavity and the air cavity.

[0014] Preferably, each of the electrically controlled components comprises an electrically controlled valve and a manual pressing member connected to the corresponding valve core extending out of the air cavity, and both the electrically controlled valve and the manual pressing member can control the valve core to slide relative to the air cavity.

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

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The electric-controlled gas combination valve device for underground coal mines provided by the present invention integrates multiple pneumatic valves on a valve plate, the first air outlet and the second air outlet of the pneumatic valve are respectively connected to the corresponding action execution components such as two cylinder body air ports of the cylinder, and the valve plate is provided with an independent air inlet duct, a first air return duct and a second air return duct, the air inlet duct is connected to the air inlet of each pneumatic valve to realize air intake, and the first air return duct and the second air return duct on each pneumatic valve are respectively connected to the first air return duct and the second air return duct; under the control of the electric control component, the corresponding pneumatic valve is actuated to connect the air inlet with the first air outlet, and the second air outlet with the first air return duct, at this time, the gas is passed The air enters the actuator through the first air outlet and drives the actuator to move. The gas in the actuator can flow to the first air return port through the second air outlet and enter the first air return duct. Alternatively, under the control of the electronic control component, the air inlet is connected to the second air outlet, and the first air outlet is connected to the second air return port. At this time, the gas enters the actuator through the second air outlet and drives the actuator to move in the opposite direction. The gas in the actuator can flow to the second air return port through the first air outlet and enter the second air return duct. In this way, the bidirectional action of the action component can be realized. The intelligence and integration can be improved by integrated setting and combined control of multiple action components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 An axonometric diagram of an electric-controlled gas combination valve device for underground coal mines provided in Example 1;

[0020] Figure 2 for Figure 1 A front view of

[0021] Figure 3 for Figure 2 A top view of

[0022] Figure 4 for Figure 2 Side view of

[0023] Figure 5 A schematic diagram of the structure of the pneumatic valve provided in Example 1;

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

[0025] Figure 7 A schematic diagram of the connection of an electric-controlled gas combination valve device for underground coal mines provided in Example 1;

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

[0027] In the figure: 1-valve plate; 11-air inlet; 12-first air return duct; 13-second air return duct; 14-plugging head; 2-pneumatic valve; 21-air inlet; 22-first air outlet; 23-second air outlet; 24-first air return port; 25-second air return port; 26-shell; 261-first cover; 262-shell; 263-second cover; 264-air cavity; 27-valve core; 271-first air duct; 272-second air duct; 273-thick diameter section; 274-sealing ring; 28-reset assembly; 281-pressure block; 282-reset spring; 3-electric control assembly; 31-electric control valve; 32-manual pressing piece. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The purpose of the present invention is to provide an electric-controlled gas combination valve device for use in coal mines to solve the problems existing in the above-mentioned prior art, integrate and realize the combined control of multiple action components, and improve intelligence and integration.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Embodiment 1

[0032] This embodiment provides an electric-controlled gas combination valve device for underground coal mines. Figure 1-Figure 7, comprising a valve plate 1, a plurality of pneumatic valves 2 arranged side by side on the valve plate 1 and a plurality of electric 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 23 of each pneumatic valve 2 are connected to the first air outlet 24 and the second air return 25 of each pneumatic valve 2. 23 are all connected to the corresponding action parts; each first return air port 24 and each second return air port 25 are respectively connected to the first return air duct 12 and the second return air duct 13; multiple electronic control components 3 are respectively connected to multiple pneumatic valves 2, and the electronic control components 3 can control the action of the corresponding pneumatic valves 2 to make the air inlet 21 connected to the first air outlet 22, and the second air outlet 23 connected to the first return air port 24, or to make the air inlet 21 connected to the second air outlet 23, and the first air outlet 22 connected to the second return air port 25.

[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a plurality of pneumatic valves 2 are integrated on a valve plate 1, and 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 action execution component such as a cylinder, and the valve plate 1 has an independent air inlet duct 11, a first air return duct 12 and a second air return duct 13, as shown in FIG. Figure 6 The air inlet 11 is connected to the air inlet 21 of each pneumatic valve 2 to realize air intake, and the first air return port 24 and the second air return port 25 on each pneumatic valve 2 are respectively connected to the first air return 12 and the second air return 13; under the control of the electronic control component 3, the corresponding pneumatic valve 2 is actuated to make the air inlet 21 connected to the first air outlet 22, and the second air outlet 23 connected to the first air return 24, as shown in FIG. Figure 5 As shown, at this time, the gas enters the actuator through the first air outlet 22 and drives the actuator to move. The gas in the actuator can flow to the first air return port 24 through the second air outlet 23 and enter the first air return duct 12, or under the control of the electronic control component 3, the air inlet 21 is connected to the second air outlet 23, and the first air outlet 22 is connected to the second air return port 25. At this time, the gas enters the actuator through the second air outlet 23 and drives the actuator to move in the opposite direction. The gas in the actuator can flow to the second air return port 25 through the first air outlet 22 and enter the second air return duct 13, so that the two-way action of the action component can be achieved; by integrating the setting and realizing the combined control of multiple action components, the intelligence and integration are improved; when the first air return duct 12 is connected to the working passage, the two ends of the second air return duct 13 are blocked by the plugging head 14, and a muffler is usually installed at the outlet of the first air return duct 12 to make the gas outlet smooth and noiseless; on the contrary, the two ends of the first air return duct 12 are blocked by the plugging head 14.

[0034] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 5 Each pneumatic valve 2 includes a housing 26 and a valve core 27. The housing 26 has an air cavity 264. The valve core 27 is slidably and sealedly connected to the air cavity 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 connected to the air cavity 264. The valve core 27 has a gas channel. One end of the valve core 27 can extend out of the housing 26 and be connected to the electric control component 3. The electric control component 3 can control the valve core 27 to slide relative to the air cavity 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 sliding seal of the valve core 27 and the air cavity 164, 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 circulation of gas in different directions.

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

[0036] In the optional scheme of this embodiment, it is more preferred that a first air outlet 22 and a second air outlet 23 are provided on one side of the shell 26 in a direction parallel to the axial direction and away from the inner end of the air cavity 264, and a second air return port 25, an air inlet 21 and a first air return port 24 are provided on the side of the shell 26 opposite to the valve plate 1 in a direction parallel to the axial direction and away from the inner end of the air cavity 264; the first air channel 271 and the second channel are distributed along the axial direction of the valve core 27, and the first air channel 271 is close to the inner end of the air cavity 264; a plurality of connecting holes connected to the first air channel 271 or the second air channel 272 are provided on the side wall of the valve core 27, and during the movement of the valve core 27 relative to the air cavity 264, the air inlet 25 is provided at the first air channel 271 and the second air channel 272 are provided at the second air channel 271. 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 be connected to the first air duct 271 or the second air duct 272 through the corresponding connecting holes; by setting a plurality of connecting holes, during the movement of the valve core 27, different connecting holes are connected to the corresponding air inlet 21, the first air outlet 22, the second air outlet 23, the first air return port 24 or the second air return port 25 to achieve different directions of the gas, wherein the position of the connecting hole should be specifically set according to the displacement of the valve core 27 and the position of each air port; wherein the outer diameter of the valve core 27 can be consistent with the inner diameter of the air cavity 264, and the inner wall of the air cavity 264 can block the connecting holes in the non-connected state.

[0037] In the optional scheme of this embodiment, it is more preferred that each pneumatic valve 2 further includes a reset component 28, which is arranged between the inner end of the air cavity 264 and the end of the valve core 27. The electric control component 3 can drive the valve core 27 to move in the direction of extending into the air cavity 264 and can cause the reset component 28 to elastically deform. The valve core 27 can move in the direction of withdrawing from the air cavity 264 under the action of the restoring force of the reset component 28; by setting the reset component 28, the automatic reset of the valve core 27 can be achieved, and the electric control component 3 only needs to control the valve core 27 from the initial state such as Figure 5 As shown, the valve core 27 begins to extend into the air cavity 264 to achieve a change in the gas flow direction; and after the electronic control component 3 loses control, the valve core 27 is automatically reset under the action of the reset component 28.

[0038] In the optional scheme of this 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 cavity 264; the pressure block 281 is arranged to facilitate stable force transmission with the valve core 27, and the automatic reset of the valve core 27 is achieved through the elastic deformation of the reset spring 282.

[0039] In the optional scheme of this embodiment, it is more preferred that the shell 26 includes a first cover body 261, a shell body 262 and a second cover body 263 which can be detachably connected in sequence along the axial direction, wherein the first cover body 261, the shell body 262 and the second cover body 263 are detachably connected by bolts to facilitate installation and disassembly; the shell body 262 has an air cavity 264 along the axial direction, and the side wall of the shell 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 body 261 and can extend into the air cavity 264, and the part of the valve core 27 that passes through the first cover body 261 is connected to the electronic control component 3.

[0040] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 8 The portion of the valve core 27 placed in the first cover body 261 is provided with a thick diameter section 273, the diameter of the thick diameter section 273 is larger than the inner diameter of the air cavity 264, and the thick diameter section 273 is provided to facilitate limiting the valve core 27; a sealing ring 274 is provided between the outer periphery of the thick diameter section 273 and the first cover body 261 and between the outer periphery of the valve core 27 in the air cavity 264 and the air cavity 264, thereby improving the dustproof sealing between the valve core 27 and the air cavity 264.

[0041] In the optional scheme of this embodiment, it is more preferred that each electric control component 3 includes an electric control valve 31 and a manual pressing piece 32 connected to the corresponding valve core 27 extending out of the air cavity 264, and the electric control valve 31 and the manual pressing piece 32 can control the sliding of the valve core 27 relative to the air cavity 264; by arranging the electric control valve 31 and the manual pressing piece 32, manual reversing can be performed in the power-off state, thereby improving flexibility; specifically, the electric control valve 31 is configured as an explosion-proof solenoid valve, which is detachably connected to the first cover body 261 by bolts, and the explosion-proof solenoid valve drives the valve core to move by the electromagnetic force in the energized state, and the manual pressing piece 32 such as a button or a reset valve can be connected to the end of the valve core 27 by threading, and the movement of the valve core 27 is achieved by manual pressing.

[0042] In the optional scheme of this embodiment, it is more preferred that the electric control component 3 and the corresponding pneumatic valve 2 are detachably connected. Specifically, the electric control valve 31 is detachably connected to the first cover body 261 by bolts, and the manual pressing member 32 such as a button or a reset valve can be connected to the end of the valve core 27 by threads, which is convenient for installation and disassembly.

[0043] Taking the number of pneumatic valves 2 as nine as an example, the working principle of the explosion-proof electric-controlled gas combination valve device provided by this embodiment is explained: For the convenience of description, from left to right in the figure are 1 to 9, the air inlet 21 is the P port, the first air outlet 22 is the A port, the second air outlet 23 is the B port, the first air return port 24 is the S port, and the second air return port is the R port. Correspondingly, Figure 7In the figure, the air inlet duct 11 is also represented by P, the first air return duct 12 is represented by S, and the second air return duct 13 is represented by R;

[0044] When the gas source with appropriate pressure enters the air inlet 11 inside the valve plate 1 and is connected to the P1 port, P2 port, P3 port, P4 port, P5 port, P6 port, P7 port, P8 port, and P9 port of the pneumatic valve 2, 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, the P1 port in the combination valve 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 air return duct 12 of the valve plate 1 is connected to the S1 port and S2 port of the pneumatic valve 2. Port S, port S3, port S4, port S5, port S6, port S7, port S8, port S9, at this time, the port S of each pneumatic valve 2 is connected with the port B, that is, the port S1 in the combination valve is connected with the port B1, the port S2 is connected with the port B2, the port S3 is connected with the port B3, the port S4 is connected with the port B4, the port S5 is connected with the port B5, the port S6 is connected with the port B6, the port S7 is connected with the port B7, the port S8 is connected with the port B8, and the port S9 is connected with the port B9;

[0045] In the natural state, that is, when each electric control valve 31 is not energized, the P1 port in the combination valve 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 S1 port in the combination valve 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; according to Figure 8 As shown, at this time, the A port and the B port of each pneumatic valve 2 can be connected to the respective actuators through the air pipe, so that the action of the respective actuators can be controlled.

[0046] When one or all of the electric control valves 31 need to be energized, the electromagnet inside the electric control valve 31 is activated, and 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, 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; 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 air return passage 13 of the valve plate 1 is connected to the R1 port, R2 port, R3 port, R4 port, R5 port, R6 port, R7 port, R8 port and R9 port of the pneumatic valve 2; thus, the actions of the respective actuators can be controlled.

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

[0048] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An electric-controlled gas combination valve device for underground coal mines, characterized in that: include: A valve plate (1), wherein the valve plate (1) is provided with an independent air inlet duct (11), a first air return duct (12) and a second air return duct (13), wherein the air inlet duct (11) is used to introduce control air; A plurality of pneumatic valves (2) are arranged side by side on the valve plate (1), each of the pneumatic valves (2) being provided with 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); each of the air inlets (21) is connected to the air inlet duct (11); the first air outlet (22) and the second air outlet (23) of each of the pneumatic valves (2) are connected to a corresponding actuating component; each of the first air return ports (24) and each of the second air return ports (25) are connected to the first air return duct (12) and the second air return duct (13), respectively; and A plurality of electric control components (3) are respectively connected to the plurality of pneumatic valves (2), and the electric control components (3) are capable of controlling 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 air return 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 air return port (25).

2. The electrically controlled gas combination valve device for underground coal mines according to claim 1 is characterized in that: Each of the pneumatic valves (2) comprises a housing (26) and a valve core (27); the housing (26) has an air cavity (264); the valve core (27) is slidably and sealingly connected to the air cavity (264); the housing (26) has an 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) communicating with the air cavity (264); the valve core (27) has an air passage; one end of the valve core (27) is capable of extending Existing from the housing (26) and connected to the electronic control component (3), the electronic control component (3) is capable of controlling the valve core (27) to slide relative to the air cavity (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 air 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.

3. The electric-controlled gas combination valve device for underground coal mines according to claim 2 is characterized in that: The gas channel comprises an independent first gas channel (271) and a second gas channel (272); the positions of the first gas channel (271) and the second gas channel (272) can be moved synchronously with the valve core (27), so that the gas inlet (21) and the first gas outlet (22) are connected through the first gas channel (271), and the second gas outlet (23) and the first gas return port (24) are connected through the second gas channel (272); or the gas inlet (21) and the second gas outlet (23) are connected through the second gas channel (272), and the first gas outlet (22) and the second gas return port (25) are connected through the first gas channel (271).

4. The electrically controlled gas combination valve device for underground coal mines according to claim 3 is characterized in that: The first air outlet (22) and the second air outlet (23) are provided on one side of the housing (26) in a direction parallel to the axial direction and away from the inner end of the air cavity (264); the second air return port (25), the air inlet (21) and the first air return port (24) are provided on the side of the housing (26) opposite to the valve plate (1) in a direction parallel to the axial direction and away from the inner end of the air cavity (264); the first air channel (271) and the second channel are distributed along the axial direction of the valve core (27); and the first air channel (271) and the second channel are distributed along the axial direction of the valve core (27); 1) close to the inner end of the air cavity (264); a plurality of communication holes connected to the first air channel (271) or the second air channel (272) are arranged on the side wall of the valve core (27); when the valve core (27) moves relative to the air cavity (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 be connected to the first air channel (271) or the second air channel (272) through the corresponding communication holes.

5. The electrically controlled gas combined valve device for underground coal mines according to claim 2, characterized in that: Each of the pneumatic valves (2) further comprises a reset component (28), wherein the reset component (28) is arranged between the inner end of the air cavity (264) and the end of the valve core (27); the electric control component (3) is capable of driving the valve core (27) to move in a direction extending into the air cavity (264) and causing the reset component (28) to undergo elastic deformation; and the valve core (27) is capable of moving in a direction of being drawn out of the air cavity (264) under the action of the restoring force of the reset component (28).

6. The electrically controlled gas combined valve device for underground coal mines according to claim 5, characterized in that: The reset assembly (28) comprises 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 cavity (264).

7. The electrically controlled gas combined valve device for underground coal mines according to claim 2, characterized in that: The shell (26) includes a first cover body (261), a shell body (262) and a second cover body (263) which can be detachably connected in sequence along the axial direction; the shell body (262) has the air cavity (264) along the axial direction; the side wall of the shell 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 body (261) and can extend into the air cavity (264).

8. The electrically controlled gas combined valve device for underground coal mines according to claim 7, characterized in that: The portion of the valve core (27) disposed within the first cover body (261) is provided with a large diameter section (273), the diameter of which is larger than the inner diameter of the air cavity (264); a sealing ring (274) is provided between the outer periphery of the large diameter section (273) and the first cover body (261), and between the outer periphery of the valve core (27) within the air cavity (264) and the air cavity (264).

9. The electrically controlled gas combined valve device for underground coal mines according to claim 2, characterized in that: Each of the electric control components (3) comprises an electric control valve (31) and a manual pressing member (32) connected to the corresponding portion of the valve core (27) extending out of the air cavity (264); the electric control valve (31) and the manual pressing member (32) are both capable of controlling the valve core (27) to slide relative to the air cavity (264).

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

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