Mining electromagnetic pilot valve protection structure

Abstract

The present application relates to the technical field of electromagnetic pilot valve, especially to a mine electromagnetic pilot valve protection structure, which comprises a valve body, a medium flow cavity group is arranged in the valve body, a tympanic membrane is arranged in the medium flow cavity group and controls the liquid flow, the tympanic membrane is installed in the valve body through a connecting structure, the tympanic membrane is elastically connected with the connecting structure, a pressure detection structure is installed on the valve body and can move up and down after being pressed, the pressure detection structure is communicated with the medium flow cavity group, and a pressing structure is arranged on the upside of the tympanic membrane and can move up and down. When the medium pressure in the medium flow cavity group is too large, the pressure detection structure is controlled by the linkage structure to press the tympanic membrane downward through the pressing structure, the pressing structure supports and blocks the upside of the tympanic membrane, so that the medium cannot pass through the tympanic membrane, and the damage of the medium to the tympanic membrane and the subsequent structure is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of electromagnetic pilot valves, and in particular to a protective structure for a mining electromagnetic pilot valve. Background Technology

[0002] With the increasing popularity of automated working faces in coal mines, the valves used in hydraulic supports are gradually being replaced by electro-hydraulic directional valves instead of the original manual directional valves. The electromagnetic pilot valve is the main hydraulic component for realizing electro-control.

[0003] Pilot-operated solenoid valves, as a crucial valve structure, are widely used in coal mining, oil extraction, and other fields, and are particularly suitable for flow control of liquids, water, hot water, gas, oil, and methane. In general operation, when energized, the valve stem is lifted by electromagnetic force, opening the pilot valve port. At this time, the upper chamber of the solenoid valve is depressurized through the pilot hole, creating a pressure difference around the main valve core. Under the action of this pressure difference, the fluid pressure pushes the main valve core upward, opening the main valve port. When de-energized, under the action of spring force and the gravity of the main valve core, the valve stem returns to its original position, the pilot hole closes, the main valve core moves downward, and the main valve port closes. The pressure in the upper chamber of the solenoid valve increases, and the fluid pressure pressurizes the main valve core, resulting in a better seal.

[0004] Chinese patent CN218817306U discloses a protective structure for a mining electromagnetic pilot valve. A plug base is fixed to the top surface of the electro-hydraulic directional valve, with an electrical plug protruding from the plug base. The valve body of the electromagnetic pilot valve has a base groove, and a vertically upward-recessed plug receiving hole is formed in the middle of the top wall of the base groove. A wiring socket is located inside the plug receiving hole. This utility model has a simple structure with no electrical connectors exposed, eliminating the need for additional protection of electrical connectors. Furthermore, the finished product is aesthetically pleasing and uncluttered, improving the standardization of the appearance of underground electro-hydraulic directional valve assemblies and enhancing reliability. However, the aforementioned related technologies have the following drawbacks: electromagnetic pilot valves have high pressure requirements; when the pressure of the internal flowing medium is too high, it can damage the internal components of the electromagnetic pilot valve. Summary of the Invention

[0005] To prevent excessive pressure of the flowing medium from damaging the internal components of the electromagnetic pilot valve, this invention provides a protective structure for a mining electromagnetic pilot valve.

[0006] The present invention provides a protective structure for a mining electromagnetic pilot valve, which adopts the following technical solution: it includes a valve body, wherein a medium flow chamber assembly is provided inside the valve body, and a diaphragm with an opening and controlling the flow of liquid is provided inside the medium flow chamber assembly. The diaphragm is installed inside the valve body through a connecting structure and is elastically connected to the connecting structure. The valve body is equipped with a pressure detection structure that can move up and down when subjected to pressure. The pressure detection structure is connected to the medium flow chamber assembly. A clamping structure that can move up and down is provided on the upper side of the diaphragm.

[0007] The valve body is equipped with a linkage structure on its upper side, and the pressure detection structure controls the up and down movement of the clamping structure through the linkage structure.

[0008] Optionally, the medium flow cavity assembly includes an inlet hole and an outlet hole. The inlet hole and the outlet hole are coaxially formed inside the valve body. The ends of the inlet hole and the outlet hole, which are far apart from each other, are connected to the outside of the valve body. The outlet hole is located inside the valve body and is bent upward at one end. An annular cavity is formed inside the valve body and is coaxially formed with the upwardly bent end of the outlet hole. The inlet hole is connected to the interior of the annular cavity.

[0009] The diaphragm is coaxially located inside the annular cavity. One end of the diaphragm is bent upwards to block the outlet hole. The pressing structure and the connecting structure are both located inside the annular cavity. The pressure detection structure is connected to the inlet hole.

[0010] Optionally, a protective cover is installed on the upper surface of the valve body, and the linkage structure, pressure detection structure, connection structure and clamping structure are all located inside the protective cover.

[0011] Optionally, the pressure detection structure includes a closed cylinder and a pressure detection head. The closed cylinder is installed inside the valve body, and the upper end of the closed cylinder is connected to the outside of the valve body. A pressure regulating cylinder is threaded through the upper end of the closed cylinder, and the lower end of the pressure regulating cylinder is elastically connected to the upper end of the pressure detection head. The lower end of the closed cylinder is connected to the inlet hole.

[0012] The upper end of the pressure detection head is connected to the linkage structure, which slides through the axis of the pressure regulating cylinder. Both the sealing cylinder and the pressure regulating cylinder are located inside the protective cover.

[0013] Optionally, the connection structure includes a cylinder and an end cap. The end cap is installed on the upper end of the cylinder and fits snugly on the upper surface of the valve body. The cylinder is threaded into the annular cavity. The diaphragm is coaxially installed on the lower end of the cylinder. The upper surface of the diaphragm at its axis is elastically connected to the bottom surface of the end cap. The end cap is located inside the protective cover.

[0014] Optionally, the clamping structure includes a clamping ring column and a double rod through-frame. The double rod through-frame slides through the upper surface of the end cap and is fixed to the upper surface of the clamping ring column. The clamping ring column is adapted to be located inside the cylinder, and the double rod through-frame is elastically connected to the upper surface of the end cap.

[0015] The upper middle position of the double rod through frame is set as a round rod, and a baffle is set on the lower side of the round rod part of the double rod through frame. The baffle can be slidably connected to the upper surface of the end cover. The baffle is connected to the linkage structure, and the double rod through frame is located inside the protective cover.

[0016] Optionally, the end of the baffle away from the pressure detection structure is composed of multiple rod-shaped structures, and the end of the rod-shaped structure away from the pressure detection structure is provided with a right-angled triangle with an inclined bottom.

[0017] Optionally, the linkage structure includes a linkage rod and a linkage rope. The two ends of the linkage rope are fixed to the linkage rod and the stop respectively. The upper surface of the end cap is slidably sleeved on the outer surface of the linkage rope. The upper end of the linkage rod is bent horizontally towards one end of the stop, and the other end of the linkage rod is set vertically.

[0018] The vertical end of the linkage rod passes through the axis of the pressure regulating cylinder, the lower end of the linkage rod is fixed to the upper surface of the pressure detection head, the baffle and the end cover are horizontally elastically connected, and the linkage rod and linkage rope are located inside the protective cover.

[0019] A reset lever is fixed to the upper end of the vertical end of the linkage rod, and the upper end of the reset lever slides through the inner top wall of the protective cover.

[0020] Optionally, a reset telescopic rod is inserted and installed at the middle position of the upper end of the double-rod frame, and the reset telescopic rod is slidably installed through the top wall of the inner cover.

[0021] Optionally, the double-rod frame has two long shafts symmetrically arranged on the lower side of its upper end. The two ends of the long shafts rotate through the inside of the protective cover. One end of the long shaft is elastically connected to the protective cover, and the other end of the long shaft is located outside the protective cover and has a control rod installed on it.

[0022] An arc-shaped baffle is fixedly sleeved on the outer surface of the long shaft. The upper surface of the arc-shaped baffle is a circular arc surface, and the bottom surface of the arc-shaped baffle away from the long shaft is a horizontal surface. The arc-shaped baffle is located on the lower side of the upper circular rod part of the double rod through frame, and the arc-shaped baffle and the rod-shaped structure of the baffle are misaligned.

[0023] The arc-shaped baffles on the two long axis surfaces are symmetrically distributed with double rods through the frame.

[0024] In summary, the present invention has the following beneficial technical effects:

[0025] This invention, through the coordination of components such as a clamping structure, a linkage structure, and a pressure detection structure, ensures that when the pressure of the medium flowing in the medium flow cavity is too high, the pressure detection structure, under the high pressure of the medium, controls the clamping structure to press down on the diaphragm through the linkage structure. The clamping structure supports and blocks the upper side of the diaphragm, preventing the medium from passing through the diaphragm and reducing the damage of the medium to the diaphragm and subsequent structures.

[0026] This invention, through the coordination of components such as a reset pull rod and a reset telescopic rod, allows the medium to continue flowing within the medium flow chamber after the pressure returns to normal. Pulling the reset pull rod upwards drives the linkage rod to pull the linkage rope upwards, causing the baffle to move out of the upper position of the double-rod through-frame. Then, pulling the reset telescopic rod upwards moves the double-rod through-frame upwards. By sequentially releasing the reset pull rod and the reset telescopic rod, the baffle supports the double-rod through-frame again, allowing the pressure detection head to disengage from the diaphragm and enabling the medium to continue flowing within the medium flow chamber.

[0027] This invention, by setting up components such as an arc-shaped baffle and a control rod, allows the double-rod through-frame to move downwards while elastically connected to the end cap after the baffle disengages from supporting it. The round rod portion of the double-rod through-frame applies a thrust to the upper arc surface of the arc-shaped baffle, causing the arc-shaped baffle to rotate. The double-rod through-frame moves to the lower side of the horizontal portion of the arc-shaped baffle, at which point the clamping ring presses against the diaphragm. The double-rod through-frame, blocked by the horizontal portion of the arc-shaped baffle, ensures that the clamping ring stably presses against the diaphragm. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of the valve body in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure of the protective cover in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the connection between the valve body and the pressure detection structure in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the connection between the end cap and the cylinder in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the connection between the clamping ring and the double-rod through-frame in an embodiment of the present invention;

[0034] Figure 7 This is a front view schematic diagram of some structures in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the connection between the cylinder and the diaphragm in an embodiment of the present invention;

[0036] Figure 9 This is an embodiment of the present invention. Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0037] Reference numerals: 1. Valve body; 2. Diaphragm; 3. Medium flow chamber assembly; 31. Inlet hole; 32. Outlet hole; 33. Annular cavity; 4. Connecting structure; 41. Cylinder; 42. End cap; 5. Pressure detection structure; 51. Sealing cylinder; 52. Pressure detection head; 53. Pressure regulating cylinder; 6. Clamping structure; 61. Clamping ring column; 62. Double rod through frame; 621. Reset telescopic rod; 622. Long shaft; 623. Control rod; 624. Arc-shaped baffle; 63. Baffle; 7. Linkage structure; 71. Linkage rod; 72. Linkage rope; 73. Reset pull rod; 8. Protective cover. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1-9 The present invention will be described in further detail below.

[0039] This invention discloses a protective structure for a mining electromagnetic pilot valve. For example... Figures 1-9 As shown, the valve includes a valve body 1, and a medium flow chamber assembly 3 is provided inside the valve body 1. The medium flow chamber assembly 3 includes an inlet hole 31 and an outlet hole 32. The inlet hole 31 and the outlet hole 32 are coaxially opened inside the valve body 1. The ends of the inlet hole 31 and the outlet hole 32 that are far apart from each other are connected to the outside of the valve body 1. The outlet hole 32 is located inside the valve body 1 and bends upward. An annular cavity 33 is opened inside the valve body 1 and is coaxially opened with the upwardly bent end of the outlet hole 32. The inlet hole 31 is connected to the annular cavity 33.

[0040] An electromagnetic coil is installed inside the valve body 1. A liquid chamber is set inside the electromagnetic coil in the valve body 1. The liquid chamber is connected to the annular cavity 33. A mounting bolt is threaded through the top wall of the liquid chamber. A fine hole communicating with the outlet hole 32 is opened on the bottom wall of the liquid chamber. A magnetic plug is slidably inserted into the liquid chamber. The magnetic plug can block the fine hole. The lower end of the mounting bolt is elastically connected to the magnetic plug through a spring. The pressure of the spring can push the magnetic plug to block the fine hole. When the electromagnetic coil is energized, it generates magnetic force, which can drive the magnetic plug to compress the spring upward.

[0041] The medium flow chamber assembly 3 is equipped with a diaphragm 2 with an opening for controlling liquid flow. The diaphragm 2 is made of annular deformable material around its perimeter, allowing it to move up and down. The diaphragm 2 is installed inside the valve body 1 via a connecting structure 4. The diaphragm 2 is elastically connected to the connecting structure 4, and the diaphragm 2 tends to block downwards under elastic connection. The valve body 1 is equipped with a pressure detection structure 5 that can move up and down under pressure. The pressure detection structure 5 is connected to the medium flow chamber assembly 3. When the pressure in the medium flow chamber assembly 3 increases, the detection structure in the pressure detection structure 5 can move upwards under the medium pressure. A pressing structure 6 that can move up and down is provided on the upper side of the diaphragm 2.

[0042] The tympanic membrane 2 is coaxially located inside the annular cavity 33. The tympanic membrane 2 bends upward at one end to block the outlet hole 32. Under elastic pressure, the tympanic membrane 2 can bend upward at one end to block the outlet hole 32. The material of the part of the tympanic membrane 2 that blocks the outlet hole 32 is not easily deformed, so that the tympanic membrane 2 can stably block the outlet hole 32. The pressing structure 6 and the connecting structure 4 are both located inside the annular cavity 33. The pressure detection structure 5 is connected to the inlet hole 31.

[0043] A linkage structure 7 is provided on the upper side of the valve body 1, and the pressure detection structure 5 controls the up and down movement of the clamping structure 6 through the linkage structure 7.

[0044] A protective cover 8 is installed on the upper surface of the valve body 1. The linkage structure 7, pressure detection structure 5, connection structure 4 and clamping structure 6 are all located inside the protective cover 8. The protective cover 8 prevents external dust from adhering to the surface of the structure and hindering the movement between the structures.

[0045] The pressure detection structure 5 includes a closed cylinder 51 and a pressure detection head 52. The closed cylinder 51 is installed inside the valve body 1 and is connected to the valve body 1 by bolts, allowing the closed cylinder 51 to be detached from the valve body 1. The upper end of the closed cylinder 51 is connected to the outside of the valve body 1. A pressure regulating cylinder 53 is threaded through the upper end of the closed cylinder 51. The lower end of the pressure regulating cylinder 53 is elastically connected to the upper end of the pressure detection head 52. The elastic connection is preferably a spring, which pushes the pressure detection head 52 to the lowermost end of the closed cylinder 51. The lower end of the closed cylinder 51 is connected to the inlet hole 31. Rotating the pressure regulating cylinder 53 to engage with the closed cylinder 51 can adjust the initial elastic pressure on the pressure detection head 52 and adjust the medium pressure required to push the pressure detection head 52.

[0046] The connecting structure 4 includes a cylinder 41 and an end cap 42. The end cap 42 is installed on the upper end of the cylinder 41 and fits snugly on the upper surface of the valve body 1. The cylinder 41 is threaded into the annular cavity 33. The cylinder 41 can be removed from the annular cavity 33 by rotating the cylinder 41 relative to the annular cavity 33. The diaphragm 2 is coaxially installed on the lower end of the cylinder 41. The upper surface of the diaphragm 2 at its axis is elastically connected to the bottom surface of the end cap 42. The diaphragm 2 at its axis is connected to the end cap 42 by a spring. The spring has the function of pushing the diaphragm 2 to bend upwards and coaxially block one end of the outlet hole 32. The end cap 42 is located inside the protective cover 8.

[0047] The clamping structure 6 includes a clamping ring post 61 and a double rod through-frame 62. The double rod through-frame 62 slides through the upper surface of the end cap 42 and is fixed to the upper surface of the clamping ring post 61. The clamping ring post 61 is adapted to be located inside the cylinder 41. The double rod through-frame 62 is elastically connected to the upper surface of the end cap 42. The double rod through-frame 62 is connected to the end cap 42 by a spring, which has a tendency to pull the double rod through-frame 62 downward. The double rod through-frame 62 consists of a horizontal rod and two vertical rods. The upper ends of the horizontal rod and the two vertical rods are connected by nuts. The spring is located in the vertical rod part of the double rod through-frame 62, and the two ends of the spring are respectively connected to the end cap 42 and the horizontal rod part of the double rod through-frame 62.

[0048] The upper middle position of the double rod through frame 62 is set as a round rod. A baffle 63 is set on the lower side of the round rod part of the double rod through frame 62. The baffle 63 can be slidably connected to the upper surface of the end cover 42. The baffle 63 can slide horizontally relative to the end cover 42. The end of the baffle 63 away from the pressure detection structure 5 is composed of multiple rod-shaped structures. The end of the rod-shaped structure of the baffle 63 away from the pressure detection structure 5 is set with a right-angled triangle with a sloping bottom. When the pressure in the medium flow cavity group 3 is normal, the rod-shaped structure of the baffle 63 can support the lower end of the crossbar part of the double rod through frame 62. The clamping ring column 61 does not put pressure on the diaphragm 2. The baffle 63 is connected to the linkage structure 7. The double rod through frame 62 is located inside the protective cover 8.

[0049] A reset telescopic rod 621 is inserted and installed at the middle position of the upper end of the double rod frame 62. The reset telescopic rod 621 is slidably installed through the inner top wall of the protective cover 8. When the stop 63 disengages from supporting the double rod frame 62, the reset telescopic rod 621 reaches its maximum extension and contraction, and the clamping ring 61 just contacts and supports the tympanic membrane 2. The clamping ring 61 will not apply pressure to the tympanic membrane 2, causing damage to the tympanic membrane 2, and the maximum downward movement distance of the clamping ring 61 is limited.

[0050] The upper end of the pressure detection head 52 is connected to the linkage structure 7, which slides through the axis of the pressure regulating cylinder 53. Both the closed cylinder 51 and the pressure regulating cylinder 53 are located inside the protective cover 8.

[0051] The linkage structure 7 includes a linkage rod 71 and a linkage rope 72. The two ends of the linkage rope 72 are fixed to the linkage rod 71 and the stop 63 respectively. The upper surface of the end cap 42 is slidably sleeved on the outer surface of the linkage rope 72. The upper end of the linkage rod 71 is bent horizontally towards one end of the stop 63, and the other end of the linkage rod 71 is set vertically.

[0052] The vertical end of the linkage rod 71 is inserted through the axis of the pressure regulating cylinder 53. The lower end of the linkage rod 71 is fixed to the upper surface of the pressure detection head 52. The baffle 63 is horizontally elastically connected to the end cover 42. The linkage rod 71 and the linkage rope 72 are located inside the protective cover 8. When the pressure detection head 52 is subjected to medium pressure and moves upward, the linkage rod 71 moves upward with the pressure detection head 52 and pulls the linkage rope 72. The linkage rope 72 pulls the baffle 63 to move horizontally. When the medium pressure is large enough to drive the linkage rod 71 to move a certain distance, the baffle 63 can be disengaged from the lower side of the horizontal bar of the double rod through frame 62 by pulling the linkage rope 72.

[0053] A reset lever 73 is fixed at the upper vertical end of the linkage rod 71. The upper end of the reset lever 73 slides through the inner top wall of the protective cover 8. By pulling the reset lever 73, the linkage rod 71 can be actively pulled, causing the baffle 63 to disengage from the double rod through frame 62, without hindering the up and down movement of the double rod through frame 62.

[0054] Two long shafts 622 are symmetrically arranged on the upper and lower sides of the double rod frame 62. The two ends of the long shafts 622 rotate through the inside of the protective cover 8. One end of the long shaft 622 is elastically connected to the protective cover 8, and the other end of the long shaft 622 is located outside the protective cover 8 and a control rod 623 is installed at one end.

[0055] An arc-shaped baffle 624 is fixedly sleeved on the outer surface of the long shaft 622. The upper surface of the arc-shaped baffle 624 is an arc surface, and the bottom surface of the arc-shaped baffle 624 away from the long shaft 622 is a horizontal surface. The elastic connection between the two long shafts 622 and the protective cover 8 has a tendency to drive the arc-shaped baffles 624 on both sides to contact each other. When the double-rod through-frame 62 moves downward, the round end of the horizontal bar of the double-rod through-frame 622 contacts the arc surface of the arc-shaped baffle 624 and applies a thrust, which can push the arc-shaped baffles 624 on both sides to rotate away from each other, so that the horizontal bar of the double-rod through-frame 622 can move to the lower side of the horizontal part of the arc-shaped baffle 624, and then the arc-shaped baffle 624... The horizontal section blocks the double-rod through-frame 62, keeping the clamping ring column 61 stably at the lowest side. The arc-shaped baffle 624 is located below the upper round rod section of the double-rod through-frame 62. The arc-shaped baffle 624 and the rod-shaped structure of the baffle 63 are misaligned. After the medium pressure in the medium flow chamber group 3 is restored, the control lever 623 is manually moved to drive the two long shafts 622 to rotate relative to each other, so that the two symmetrical arc-shaped baffles 624 rotate away from each other. Then, the reset telescopic rod 621 is pulled upward, and at the same time, the baffle 63 is pulled away from the position of the double-rod through-frame 62, controlling the double-rod through-frame 62 to move back to the upper side of the baffle 63. The baffle 63 can then reposition itself between the double-rod through-frame 62.

[0056] The working principle is as follows: The medium fluid flows in the medium flow chamber 3. The medium fluid can pass through the openings on the surface of the diaphragm 2. When the pressure of the medium flowing in the medium flow chamber 3 is too high, the pressure detection structure 5 is controlled by the linkage structure 7 to press the clamping structure 6 downward to the diaphragm 2 under the high pressure of the medium. The clamping structure 6 supports and blocks the upper side of the diaphragm 2, so that the medium can no longer pass through the diaphragm 2. The high pressure medium will no longer cause damage to the diaphragm 2 and the internal structure of the valve body 1.

[0057] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A mine electromagnetic pilot valve protection structure, comprising a valve body (1), characterized in that: The valve body (1) is internally provided with a medium flow cavity group (3), the drum diaphragm (2) is internally provided with an opening and controls the liquid flow, the drum diaphragm (2) is installed in the valve body (1) by the connecting structure (4), the drum diaphragm (2) is elastically connected with the connecting structure (4), the valve body (1) is provided with a pressure detection structure (5) which can move up and down after being pressed, the pressure detection structure (5) is communicated with the medium flow cavity group (3), and the drum diaphragm (2) is provided with a compression structure (6) which can move up and down on the upside; The valve body (1) is provided with a linkage structure (7) on the upside, and the pressure detection structure (5) controls the compression structure (6) to move up and down through the linkage structure (7); The medium flow cavity group (3) comprises an inflow hole (31) and an outflow hole (32), the inflow hole (31) and the outflow hole (32) are coaxially arranged in the valve body (1), the inflow hole (31) and the outflow hole (32) are communicated with the outside of the valve body (1) at the ends away from each other, the outflow hole (32) is bent upwards at one end in the valve body (1), the valve body (1) is internally provided with a ring cavity (33) which is coaxially arranged with the upwards bent end of the outflow hole (32), and the inflow hole (31) is communicated with the inside of the ring cavity (33); The drum diaphragm (2) is coaxially arranged in the ring cavity (33), the drum diaphragm (2) blocks the upwards bent end of the outflow hole (32), the compression structure (6) and the connecting structure (4) are all arranged in the ring cavity (33), and the pressure detection structure (5) is communicated with the inflow hole (31); The valve body (1) is provided with a protective cover (8) on the upper surface, and the linkage structure (7), the pressure detection structure (5), the connecting structure (4) and the compression structure (6) are all arranged in the protective cover (8); The pressure detection structure (5) comprises a closed cylinder (51) and a pressure detection head (52), the closed cylinder (51) is arranged in the valve body (1), the upper end of the closed cylinder (51) is communicated with the outside of the valve body (1), a pressure regulating cylinder (53) is threadedly penetrated on the upper end of the closed cylinder (51), the lower end of the pressure regulating cylinder (53) is elastically connected with the upper end of the pressure detection head (52), and the lower end of the closed cylinder (51) is communicated with the inflow hole (31); The upper end of the pressure detection head (52) is connected with the linkage structure (7), the linkage structure (7) is slidably arranged at the axis of the pressure regulating cylinder (53), and the closed cylinder (51) and the pressure regulating cylinder (53) are all arranged in the protective cover (8); The connecting structure (4) comprises a cylinder (41) and an end cover (42), the end cover (42) is arranged on the upper end of the cylinder (41) and is attached to the upper surface of the valve body (1), the cylinder (41) is threadedly inserted into the ring cavity (33), the drum diaphragm (2) is coaxially arranged on the lower end of the cylinder (41), the upper surface of the drum diaphragm (2) is elastically connected with the bottom surface of the end cover (42) at the axis, and the end cover (42) is arranged in the protective cover (8). The compression structure (6) comprises a compression ring column (61) and a double-rod frame (62), the double-rod frame (62) is slidably penetrated through the upper surface of the end cover (42) and fixed to the upper surface of the compression ring column (61), the compression ring column (61) is adapted to be located inside the cylinder (41), and the double-rod frame (62) is elastically connected to the upper surface of the end cover (42); The upper end of the double-rod frame (62) is provided with a circular rod-shaped portion, the lower side of the circular rod-shaped portion of the double-rod frame (62) is provided with a blocking frame (63), the blocking frame (63) is transversely slidably connected to the upper surface of the end cover (42), the blocking frame (63) is connected to the linkage structure (7), and the double-rod frame (62) is located inside the protective cover (8); The blocking frame (63) is composed of a plurality of rod-shaped structures away from the pressure detection structure (5), and the rod-shaped structure of the blocking frame (63) is provided with a right-angled triangle with an inclined bottom surface away from the pressure detection structure (5); The upper end of the double-rod frame (62) is provided with a reset telescopic rod (621) inserted and mounted at the inner top wall of the protective cover (8); The upper end of the double-rod frame (62) is provided with two long shafts (622) symmetrically arranged on the lower side, the long shafts (622) are rotatably penetrated through the inside of the protective cover (8), one end of the long shaft (622) is elastically connected to the protective cover (8), and the other end of the long shaft (622) is located outside the protective cover (8) and provided with a control rod (623); The outer surface of the long shaft (622) is fixedly sleeved with an arc-shaped baffle (624), the upper surface of the arc-shaped baffle (624) is a circular arc surface, the bottom surface of the arc-shaped baffle (624) away from the long shaft (622) is a horizontal surface, the arc-shaped baffle (624) is located below the circular rod-shaped portion of the upper end of the double-rod frame (62), and the arc-shaped baffle (624) is arranged in a staggered manner with the rod-shaped structure of the blocking frame (63); The arc-shaped baffles (624) arranged on the surfaces of the two long shafts (622) are symmetrically distributed with respect to the double-rod frame (62).

2. The electromagnetic pilot valve protection structure for mine use according to claim 1, characterized in that: The linkage structure (7) comprises a linkage rod (71) and a linkage rope (72), the two ends of the linkage rope (72) are fixed to the linkage rod (71) and the blocking frame (63) respectively, the upper surface of the end cover (42) is slidably sleeved on the outer surface of the linkage rope (72), the upper end of the linkage rod (71) is horizontally bent towards one end of the blocking frame (63), and the other end of the linkage rod (71) is vertically arranged; The vertical end of the linkage rod (71) is arranged at the axis of the pressure regulating cylinder (53), the lower end of the linkage rod (71) is fixed to the upper surface of the pressure detection head (52), the blocking frame (63) is horizontally and elastically connected to the end cover (42), and the linkage rod (71) and the linkage rope (72) are located inside the protective cover (8); The vertical end of the linkage rod (71) is fixed with a reset pull rod (73), and the upper end of the reset pull rod (73) is slidably penetrated through the inner top wall of the protective cover (8).

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