An interlocking proportional intrinsically safe electromagnetic pilot valve for mining applications

Abstract

This invention relates to an interlocking proportional intrinsically safe electromagnetic pilot valve for mining, belonging to the field of coal mine hydraulic control technology. It includes a housing, with two sets of symmetrically arranged electromagnets on the upper side inside the housing. A vertical push rod is fixedly mounted on the armature of each set of electromagnets. Two sets of symmetrically arranged pilot valve cores are located on the lower side inside the housing. A working chamber is located in the middle of the inner side of the housing. The lower ends of both push rods extend downwards into the working chamber, and the upper ends of the top rods of the two sets of pilot valve cores extend upwards into the working chamber. The lower ends of the two push rods are respectively connected to the upper ends of the top rods on the other side via levers. An interlocking mechanism is provided inside the working chamber. The interlocking mechanism includes a sliding locking rod with a set of oblique holes at both ends. A horizontally moving rod is fixedly mounted on each of the two push rods, and the two moving rods are respectively inserted into the two sets of oblique holes. This invention solves the problems of current electromagnetic pilot valves being prone to false triggering and having insufficient control accuracy.

Description

Technical Field

[0001] This invention belongs to the field of coal mine hydraulic control technology, specifically relating to an interlocking proportional intrinsically safe electromagnetic pilot valve for mining. Background Technology

[0002] The electromagnetic pilot valve is a key component in electro-hydraulic directional valve control. In the coal mining industry, it typically controls a two-position three-way directional valve, which in turn controls the extension and retraction of the corresponding hydraulic cylinder to achieve functions such as raising, lowering, extending, and retracting the support. Existing electromagnetic pilot valves have the following drawbacks:

[0003] (1) Operational safety hazards: The control panel buttons or manual buttons are prone to misoperation (simultaneous triggering of both buttons), which may cause the bracket to malfunction, resulting in equipment damage or personal injury;

[0004] (2) Insufficient control precision: The cylinder movement can only achieve a constant speed, resulting in a large initial start-up impact, which damages connecting parts such as trunnions and equipment, and cannot accurately adjust the posture of the support; although the traditional electromagnetic pilot valve can achieve flow regulation, its complex structure leads to response lag and control fluctuation, thereby reducing the support precision and increasing the failure rate of related equipment such as scraper conveyors and supports. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and proposes an interlocking proportional intrinsically safe electromagnetic pilot valve for mining; it solves the problems of easy false triggering and insufficient control accuracy of current electromagnetic pilot valves.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0007] An interlocking proportional intrinsically safe electromagnetic pilot valve for mining includes a housing. Two sets of symmetrically arranged electromagnets are disposed on the upper side of the housing. A vertical push rod is fixedly mounted on the armature of each set of electromagnets. Two sets of symmetrically arranged pilot valve cores are disposed on the lower side of the housing. A working chamber is disposed in the middle of the inner side of the housing. The lower ends of both push rods extend downwards into the working chamber. The upper ends of the top rods of the two sets of pilot valve cores extend upwards into the working chamber. The lower ends of the two push rods are respectively connected to the upper ends of the top rods on the other side via levers. An interlocking mechanism is disposed inside the working chamber. The interlocking mechanism includes a slidingly arranged locking rod, with a set of oblique holes at each end of the locking rod. A horizontally moving rod is fixedly mounted on each of the two push rods, and the two moving rods are respectively inserted into the two sets of oblique holes.

[0008] Furthermore, the upper housing, lower housing, and fixing seat are provided as follows: the upper housing is located at the upper end of the lower housing; the working chamber is located at the upper end face of the lower housing; a mounting groove is provided on one side of the upper end face of the lower housing; and the fixing seat is located at the mounting groove. Two sets of electromagnets are fixedly installed inside the upper housing, and two sets of pilot valve cores are fixedly installed inside the lower housing.

[0009] Furthermore, a sliding seat is fixedly installed on the outer side of the fixed seat, and the sliding seat extends into the working cavity; a sliding groove is provided on the end face of the sliding seat away from the fixed seat, and the locking rod is slidably installed in the sliding groove; a vertical elastic rod is fixedly installed in the sliding groove, and the elastic rod is inserted into the middle of the locking rod.

[0010] Furthermore, a clearance groove is provided at each end of the locking rod, and an oblique hole is provided on the front and back sides of each clearance groove; the oblique holes on both sides are symmetrically arranged, with the upper ends of the oblique holes on both sides close to each other and the lower ends far apart from each other.

[0011] Furthermore, the two push rods slide downward through the sliding seat and are respectively located inside the clearance grooves at both ends of the locking rod. The action rod on each push rod is respectively inserted into the oblique holes on the front and rear sides of the clearance groove on the same side, and the action rod is located in the middle of the oblique hole.

[0012] Furthermore, the two levers are the first lever and the second lever, both of which are horizontally arranged in the left-right direction and are located below the locking bar.

[0013] Furthermore, the left end of the first lever is hinged to the left inner wall of the working chamber, and the right end of the first lever is connected to the lower end of the right push rod; the right end of the second lever is hinged to the right inner wall of the working chamber, and the left end of the second lever is connected to the lower end of the left push rod.

[0014] Furthermore, the upper end of the push rod of the left pilot valve core contacts the left side of the lower end face of the first lever, and the upper end of the push rod of the right pilot valve core contacts the right side of the lower end face of the second lever.

[0015] Furthermore, a waist-shaped groove that runs through the front and back is provided in the middle of the locking bar, and a driven rack that extends left and right is fixedly installed at the bottom surface inside the waist-shaped groove.

[0016] Furthermore, a drive motor is fixedly installed inside the fixed base, and a drive gear is fixedly installed on the output shaft of the drive motor. The drive gear is located inside the waist-shaped groove of the fixed base and meshes with the driven rack.

[0017] The beneficial effects of this invention compared to the prior art are as follows:

[0018] (1) Through the ingenious inclined hole-actuator mechanical structure, it is ensured that when a single electromagnet is energized to trigger one side of the pilot valve core, the valve core on the other side will be forcibly locked in the untriggered state. This interlocking mechanism completely eliminates the possibility of simultaneous triggering of both pilot valve cores due to misoperation or signal interference from a physical perspective, greatly improving the safety and reliability of the system in high-risk environments such as mining.

[0019] (2) It innovatively integrates a proportional adjustment mechanism driven by a servo motor, gears, and racks. By precisely controlling the direction and angle of the motor, the locking lever can be moved linearly, thereby achieving stepless, proportional, and precise control of the opening of the pilot valve core on one side. This meets the higher requirements of modern hydraulic systems for fine regulation of flow or pressure.

[0020] (3) When both electromagnets are accidentally energized at the same time, the forces of the push rods on both sides will cancel each other out on the locking rod, preventing it from moving. At this time, both push rods on both sides are locked and cannot press down the lever, thus ensuring that neither valve core on either side will be triggered, providing another important safety protection.

[0021] (4) The built-in elastic rod can automatically push the locking rod back to the center position after the electromagnet is de-energized, thereby resetting the entire mechanism and returning both pilot valve cores to the untriggered state. This design ensures the stability and ready state of the valve, and the reset can be completed without additional control.

[0022] (5) The valve body integrates multiple functions such as electromagnetic drive, mechanical interlock, and proportional regulation, resulting in a compact structure and reasonable layout.

[0023] (6) As an intrinsically safe mining equipment, its design meets the requirements for explosion-proof safety and is particularly suitable for use in environments with explosive hazards such as coal mines, ensuring safe operation under harsh working conditions. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of the invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the overall structure of the invention. Figure 2 ;

[0027] Figure 3 This is a three-dimensional schematic diagram of the shell after half of it has been cut off;

[0028] Figure 4 This is a front view of the shell after partial sectioning;

[0029] Figure 5 This is a schematic diagram of the structure of the present invention after removing the shell. Figure 1 ;

[0030] Figure 6 This is a schematic diagram of the structure of the present invention after removing the shell. Figure 2 ;

[0031] Figure 7 This is a schematic diagram of the interlocking mechanism. Figure 1 ;

[0032] Figure 8 This is a schematic diagram of the interlocking mechanism. Figure 2 ;

[0033] Figure 9 This is a schematic diagram showing the connection between the first lever, the second lever, and the push rod;

[0034] Figure 10 This is a diagram illustrating the connection between the locking rod and the push rod. Figure 1 ;

[0035] Figure 11 This is a schematic diagram showing the connection between the locking rod, the push rod, and the sliding seat;

[0036] Figure 12 This is a diagram illustrating the connection between the locking rod and the push rod. Figure 2 ;

[0037] Among them, 1 is the upper housing, 2 is the lower housing, 3 is the fixed seat, 4 is the electromagnet, 5 is the pilot valve core, 6 is the working chamber, 7 is the push rod, 8 is the top rod, 9 is the locking rod, 10 is the oblique hole, 11 is the actuating rod, 12 is the sliding seat, 13 is the elastic rod, 14 is the clearance groove, 15 is the first lever, 16 is the second lever, 17 is the hinge shaft, 18 is the drive motor, 19 is the driven rack, and 20 is the driving gear. Detailed Implementation

[0038] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0039] like Figure 1 As shown in Figure 12, this invention provides an interlocking proportional intrinsically safe electromagnetic pilot valve for mining, comprising a housing, two sets of symmetrically arranged electromagnets 4 on the upper side inside the housing, each set of electromagnets 4 having a vertical push rod 7 fixedly mounted on its armature, two sets of symmetrically arranged pilot valve cores 5 on the lower side inside the housing, and a working chamber 6 in the middle of the inner side of the housing. The lower ends of the two push rods 7 extend downward into the working chamber 6, and the upper ends of the top rods 8 of the two sets of pilot valve cores 5 extend upward into the working chamber 6. The lower ends of the two push rods 7 are respectively connected to the upper ends of the top rods 8 on the other side through a lever. An interlocking mechanism is provided inside the working chamber 6, the interlocking mechanism including a slidably arranged locking rod 9, each end of the locking rod 9 having a set of inclined holes 10; and a horizontally arranged actuating rod 11 is fixedly mounted on each of the two push rods 7, the two actuating rods 11 being inserted into the two sets of inclined holes 10 respectively.

[0040] The upper housing 1, lower housing 2, and fixing base 3 are described. The upper housing 1 is located at the upper end of the lower housing 2 and is fixedly connected to the lower housing 2 by two bolts. The working cavity 6 is located at the upper end face of the lower housing 2. A mounting groove is provided on one side of the upper end face of the lower housing 2, and the fixing base 3 is located in the mounting groove and is fixedly connected to the lower housing 2 by four locking screws.

[0041] Two sets of electromagnets 4 are fixedly installed inside the upper housing 1, and two sets of pilot valve cores 5 are fixedly installed inside the lower housing 2.

[0042] A sliding seat 12 is fixedly mounted on the outer surface of the fixed seat 3, extending into the working cavity 6. A horizontal sliding groove is provided on the end face of the sliding seat 12 away from the fixed seat 3, and the locking rod 9 is slidably disposed within the sliding groove in the left-right direction. A vertical elastic rod 13 is fixedly mounted inside the sliding groove, and the elastic rod 13 is inserted into the middle of the locking rod 9. When the locking rod 9 slides in the left-right direction under the action of external force, the elastic rod 13 can assist the locking rod 9 to return to the middle position of the sliding groove after the external force disappears.

[0043] The locking rod 9 is a horizontally arranged square rod structure, with its length running horizontally in the left-right direction. A clearance groove 14 is provided at each end of the locking rod 9, and an oblique hole 10 is provided on both the front and rear sides of each clearance groove 14. The oblique holes 10 on both sides are symmetrically arranged, with their upper ends close to each other and their lower ends far apart.

[0044] The two levers are designated as first lever 15 and second lever 16, both horizontally positioned in the left-right direction and located below the locking lever 9. The left end of the first lever 15 is hinged to the left inner wall of the working chamber 6 via a horizontally hinged shaft 17, and the right end of the first lever 15 is connected to the lower end of the right push rod 7. Similarly, the right end of the second lever 16 is hinged to the right inner wall of the working chamber 6 via a horizontally hinged shaft 17, and the left end of the second lever 16 is connected to the lower end of the left push rod 7. The two hinged shafts 17 are located outside the push rods 8 of the two sets of pilot valve cores 5. The upper end of the push rod 8 of the left pilot valve core 5 contacts the left side of the lower end face of the first lever 15, and the upper end of the push rod 8 of the right pilot valve core 5 contacts the right side of the lower end face of the second lever 16.

[0045] The two push rods 7 slide downward through the sliding seat 12 and are respectively located inside the clearance grooves 14 at both ends of the locking rod 9. The action rod 11 on each push rod 7 is respectively inserted into the oblique holes 10 on the front and rear sides of the clearance groove 14 on the same side, and the action rod 11 is located in the middle of the oblique hole 10.

[0046] The interlocking mechanism also includes a drive motor 18, a drive gear 20, and a driven rack 19. A through-groove is provided in the middle of the locking rod 9, with its length horizontally aligned to the left and right. A driven rack 19 extending to the left and right is fixedly installed at the bottom surface inside the through-groove. The drive motor 18, a servo motor, is fixedly installed inside the fixed base 3. The output shaft of the drive motor 18 is horizontally aligned to the left and right, and a drive gear 20 is fixedly installed on the output shaft of the drive motor 18. The drive gear 20 is located inside the through-groove of the fixed base 3 and meshes with the driven rack 19.

[0047] The working principle of this invention is as follows:

[0048] When the present invention is in a non-operating state, the push rods 7 of both sets of electromagnets 4 are not extended downwards. At this time, the action rods 11 on the two push rods 7 are respectively located in the middle of the two sets of inclined holes 10, the locking rod 9 is located in the middle of the sliding groove, the first lever 15 and the second lever 16 are both in a horizontal state and neither applies downward pressure to the push rods 8 of the two sets of pilot valve cores 5. The two sets of pilot valve cores 5 are both in a non-triggered state.

[0049] When it is necessary to trigger the pilot valve core 5 on the left, the electromagnet 4 on the right is energized, causing the push rod 7 on the right to slide downward. The push rod 7 on the right drives the right end of the first lever 15 to rotate downward around the hinge shaft 17 on the left. The lower end face of the first lever 15 begins to apply downward pressure to the upper end of the push rod 8 of the pilot valve core 5 on the left, causing the push rod 8 of the pilot valve core 5 on the left to be pressed down, thereby triggering the pilot valve core 5 on the left.

[0050] When the right push rod 7 slides downward, it causes the right action rod 11 to slide downward. The right action rod 11 applies downward pressure to the bottom surface of the right inclined hole 10, causing the locking rod 9 to begin sliding to the left inside the sliding groove. The right action rod 11 slides to the lower end of the right inclined hole 10. As the locking rod 9 slides to the left, the bottom surface of the left inclined hole 10 applies pressure to the left action rod 11, causing the left action rod 11 to slide upward and to the upper end of the left inclined hole 10. The left action rod 11 causes the left push rod 7 to slide upward. The left push rod 7 causes the left end of the second lever 16 to rotate upward around the right hinge axis 17, causing the second lever 16 to move away from the top rod 8 of the right pilot valve core 5, thus ensuring that the right pilot valve core 5 is not triggered.

[0051] When it is necessary to trigger the right pilot valve core 5, the left electromagnet 4 is energized, causing the left push rod 7 to slide downward. The left push rod 7 drives the left end of the second lever 16 to rotate downward around the right hinge shaft 17. The lower end face of the second lever 16 begins to apply downward pressure to the upper end of the push rod 8 of the right pilot valve core 5, causing the push rod 8 of the right pilot valve core 5 to be pressed down, thereby triggering the right pilot valve core 5.

[0052] When the left push rod 7 slides downward, it causes the left action rod 11 to slide downward. The left action rod 11 applies downward pressure to the bottom surface of the left inclined hole 10, causing the locking rod 9 to begin sliding to the right inside the sliding groove. The left action rod 11 slides to the lower end of the left inclined hole 10. As the locking rod 9 slides to the right, the bottom surface of the right inclined hole 10 applies pressure to the right action rod 11, causing the right action rod 11 to slide upward and to the upper end of the right inclined hole 10. The right action rod 11 causes the right push rod 7 to slide upward. The right push rod 7 causes the right end of the first lever 15 to rotate upward around the left hinge axis 17, causing the first lever 15 to move away from the top rod 8 of the left pilot valve core 5, thus ensuring that the left pilot valve core 5 is not triggered.

[0053] Therefore, regardless of which side of the pilot valve core 5 is triggered, the push rod 8 of the other side of the pilot valve core 5 will be in an interlocked state and will not be accidentally triggered.

[0054] When the electromagnet 4 is de-energized, the push rod 7 no longer applies pressure to the locking rod 9 through the action rod 11. At this time, under the action of the elastic rod 13, the locking rod 9 returns to the middle position inside the sliding groove, the action rods 11 on both sides return to the middle position of the inclined hole 10, the push rods 7 on both sides also return to the initial position, and the pilot valve cores 5 on both sides return to the untriggered state.

[0055] When both sets of electromagnets 4 are energized, the push rods 7 on both sides are in a downward sliding state. The action rods 11 on both sides simultaneously apply pressure to the middle of the bottom surface of the inclined holes 10 on both sides, pushing the locking rod 9 to the other side. The thrust on both sides cancels each other out, so the locking rod 9 will not slide to either side. Therefore, neither push rod 7 on both sides will slide downward, which means that neither pilot valve core 5 on both sides will be triggered. This physically prevents the pilot valve core 5 on both sides from being triggered simultaneously.

[0056] When it is necessary to adjust the opening of the pilot valve core 5 on one side proportionally, the control drive motor 18 starts to rotate.

[0057] When the drive motor 18 rotates in the forward direction, it drives the drive gear 20 to rotate in the forward direction. Since the drive gear 20 meshes with the driven rack 19, it drives the locking rod 9 to slide to the left. The right actuating rod 11 slides downward from the middle position of the right inclined hole 10, and the left actuating rod 11 slides upward from the middle position of the left inclined hole 10, causing the right push rod 7 to slide downward and the left push rod 7 to slide upward. The right push rod 7 drives the right end of the first lever 15 to rotate downward around the left hinge shaft 17. The lower end face of the first lever 15 begins to apply downward pressure to the upper end of the top rod 8 of the left pilot valve core 5, causing the top rod 8 of the left pilot valve core 5 to be pressed down, thereby triggering the left pilot valve core 5. The left push rod 7 drives the left end of the second lever 16 to rotate upward around the right hinge shaft 17, causing the second lever 16 to move away from the top rod 8 of the right pilot valve core 5, thereby ensuring that the right pilot valve core 5 is not triggered. By controlling the rotation angle of the drive motor 18, the distance the locking rod 9 slides to the left is adjusted, thereby adjusting the downward sliding range of the push rod 7 on the right side. This adjusts the downward rotation range of the right end of the first lever 15, which in turn adjusts the downward pressure of the push rod 8 of the pilot valve core 5 on the left side. Finally, the opening of the pilot valve core 5 on the left side is adjusted proportionally.

[0058] When the drive motor 18 rotates in the reverse direction, it drives the drive gear 20 to rotate in the reverse direction. Since the drive gear 20 meshes with the driven rack 19, it drives the locking rod 9 to slide to the right. The left actuating rod 11 slides downward from the middle position of the left inclined hole 10, and the right actuating rod 11 slides upward from the middle position of the right inclined hole 10, causing the left push rod 7 to slide downward and the right push rod 7 to slide upward. The left push rod 7 drives the left end of the second lever 16 to rotate downward around the right hinge shaft 17. The lower end face of the second lever 16 begins to apply downward pressure to the upper end of the top rod 8 of the right pilot valve core 5, causing the top rod 8 of the right pilot valve core 5 to be pressed down, thereby triggering the right pilot valve core 5. The right push rod 7 drives the right end of the first lever 15 to rotate upward around the left hinge shaft 17, causing the first lever 15 to move away from the top rod 8 of the left pilot valve core 5, thereby ensuring that the left pilot valve core 5 is not triggered. By controlling the rotation angle of the drive motor 18, the distance the locking rod 9 slides to the right is adjusted, thereby adjusting the downward sliding range of the push rod 7 on the left side. This, in turn, adjusts the downward rotation range of the left end of the second lever 16, thereby adjusting the downward pressure range of the push rod 8 of the pilot valve core 5 on the right side. Finally, the opening degree of the pilot valve core 5 on the right side is adjusted proportionally.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An interlocking proportional intrinsically safe electromagnetic pilot valve for mining applications, characterized in that: The device includes a housing, with two sets of symmetrical electromagnets (4) arranged on the upper side inside the housing. A vertical push rod (7) is fixedly arranged on the armature of each set of electromagnets (4). Two sets of symmetrical pilot valve cores (5) are arranged on the lower side inside the housing. A working chamber (6) is arranged in the middle of the inner side of the housing. The lower ends of the two push rods (7) extend downward into the working chamber (6). The upper ends of the top rods (8) of the two sets of pilot valve cores (5) extend upward into the working chamber (6). The lower ends of the two push rods (7) are connected to the upper ends of the top rods (8) on the other side through a lever. An interlocking mechanism is arranged inside the working chamber (6). The interlocking mechanism includes a sliding locking rod (9). A set of inclined holes (10) are arranged at both ends of the locking rod (9). A horizontal action rod (11) is fixedly arranged on each of the two push rods (7). The two action rods (11) are inserted into the two sets of inclined holes (10). The housing includes an upper housing (1), a lower housing (2), and a fixing seat (3). The upper housing (1) is located at the upper end of the lower housing (2). The working chamber (6) is located at the upper end face of the lower housing (2). An installation groove is provided on one side of the upper end face of the lower housing (2). The fixing seat (3) is located at the installation groove. Two sets of electromagnets (4) are fixedly installed inside the upper housing (1), and two sets of pilot valve cores (5) are fixedly installed inside the lower housing (2). A clearance groove (14) is provided at each end of the locking bar (9), and a slanted hole (10) is provided on the front and back sides of each clearance groove (14); the slanted holes (10) on both sides are symmetrically arranged, with the upper ends of the slanted holes (10) on both sides close to each other and the lower ends far apart from each other; The two levers are the first lever (15) and the second lever (16). Both the first lever (15) and the second lever (16) are set horizontally along the left and right directions. Both the first lever (15) and the second lever (16) are located below the locking bar (9). A waist-shaped groove that runs through the front and back is provided in the middle of the locking bar (9), and a driven rack (19) that extends left and right is fixedly provided at the bottom surface inside the waist-shaped groove. A drive motor (18) is fixedly installed inside the fixed base (3), and a drive gear (20) is fixedly installed on the output shaft of the drive motor (18). The drive gear (20) is located inside the waist-shaped groove of the fixed base (3) and meshes with the driven rack (19).

2. The intrinsically safe electromagnetic pilot valve for mining applications of an interlocking proportional type according to claim 1, characterized in that: A sliding seat (12) is fixedly installed on the outer side of the fixed seat (3), and the sliding seat (12) extends into the working cavity (6); a sliding groove is provided on the side end face of the sliding seat (12) away from the fixed seat (3), and the locking rod (9) is slidably installed in the sliding groove; a vertical elastic rod (13) is fixedly installed in the sliding groove, and the elastic rod (13) is inserted into the middle of the locking rod (9).

3. The intrinsically safe electromagnetic pilot valve for mining applications of an interlocking proportional type according to claim 1, characterized in that: Two push rods (7) slide downward through the sliding seat (12) and are located in the clearance grooves (14) at both ends of the locking rod (9). The action rod (11) on each push rod (7) is inserted into the oblique holes (10) on the front and rear sides of the clearance groove (14) on the same side. The action rod (11) is located in the middle of the oblique hole (10).

4. The intrinsically safe electromagnetic pilot valve for mining applications of an interlocking proportional type according to claim 1, characterized in that: The left end of the first lever (15) is hinged to the left inner wall of the working chamber (6), and the right end of the first lever (15) is connected to the lower end of the right push rod (7); the right end of the second lever (16) is hinged to the right inner wall of the working chamber (6), and the left end of the second lever (16) is connected to the lower end of the left push rod (7).

5. The intrinsically safe electromagnetic pilot valve for mining applications of an interlocking proportional type according to claim 4, characterized in that: The upper end of the push rod (8) of the pilot valve core (5) on the left side is in contact with the left side of the lower end face of the first lever (15), and the upper end of the push rod (8) of the pilot valve core (5) on the right side is in contact with the right side of the lower end face of the second lever (16).

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