Mining explosion-proof cover device

Abstract

The utility model relates to a mining anti-explosion cover device which comprises two cover plates which jointly cover a well mouth, the two cover plates are hinged to the middle of the well mouth and form a fixed side, and the movable sides, opposite to the fixed side, of the two cover plates can move oppositely to open the well mouth. A mounting rack; the counterweight mechanism comprises two pulley blocks and two counterweight hammers, the two pulley blocks and the two counterweight hammers are in one-to-one correspondence with the two cover plates respectively, each pulley block comprises a rope and a first pulley rotationally connected with the mounting frame, one end of each rope is connected with the corresponding cover plate, and the other end of each rope is wound around the corresponding first pulley and connected with the corresponding counterweight hammer. When gas or coal dust explosion occurs in a mine, shock waves push the movable sides of the two cover plates to be opened oppositely, the cover plates can give way to upward paths of the shock waves, large deformation and displacement of the cover plates caused by the shock waves are avoided, and it is guaranteed that the cover plates can still be used after being reset.

Description

Technical Field

[0001] The present disclosure relates to the technical field of explosion-proof covers, and more particularly, to a mine explosion-proof cover device. Background Art

[0002] The explosion-proof cover is one of the main components of the coal mine ventilation safety facilities and is installed at the mouth of the return air vertical shaft. Under normal circumstances, the explosion-proof cover is freely placed on the wind well lock mouth plate. When a gas or coal dust explosion accident occurs underground, the high-pressure air flow pushes open the explosion-proof cover to reduce the air flow pressure, thereby protecting the ventilator from being damaged.

[0003] In the related art, the explosion-proof cover has a snap cap structure. Specifically, under the impact of a gas or coal dust explosion, the explosion-proof cover will move upward away from the wellhead, allowing the shock wave to leave the mine. However, this method will cause a large degree of deformation or displacement of the explosion-proof cover, resulting in the explosion-proof cover being unable to be used again. Utility Model Content

[0004] The purpose of the present disclosure is to provide a mine explosion-proof cover device to at least partially solve the problems existing in the related art.

[0005] To achieve the above object, the present disclosure provides a mine explosion-proof cover device, including:

[0006] Two cover plates, which jointly cover the wellhead. The two cover plates are hinged in the middle of the wellhead to form a fixed side, and the movable sides of the two cover plates opposite to the fixed side can move towards each other to open the wellhead;

[0007] An installation frame; and

[0008] A counterweight mechanism, including two pulley groups and two counterweight hammers. The two pulley groups and the two counterweight hammers are respectively arranged corresponding to the two cover plates. The pulley group includes a rope and a first pulley rotatably connected to the installation frame. One end of the rope is connected to the cover plate, and the other end is wound around the first pulley and connected to the counterweight hammer.

[0009] Optionally, the installation frame is located on the axis in the middle of the wellhead, and the two first pulleys are coaxially arranged and rotatably installed on the installation frame.

[0010] Optionally, the number of the counterweight mechanism and the installation frame is both two, and they are respectively installed on both sides of the cover plate in the length direction.

[0011] Optionally, a buffer mechanism is provided on the top surface of at least one of the two cover plates, and the buffer mechanism is used to buffer the force when the two cover plates abut against each other.

[0012] Optionally, the buffer mechanism includes a plurality of springs and a plurality of rubber parts, and the plurality of springs and the plurality of rubber parts are distributed at intervals on the cover plate.

[0013] Optionally, the wellhead is configured to be square, and the mine explosion-proof cover device further includes two support plates respectively arranged on two sides in the length direction of the cover plate. The two support plates are fixedly connected to the wellhead. The support plates are configured to be triangular, and the cover plate is configured to be square. When the cover plate is closed, the cover plate overlaps on two sides of the triangle.

[0014] Optionally, the mine explosion-proof cover device further includes a fixing rod, and two ends of the fixing rod are respectively connected to the two support plates, and the two cover plates are hinged at the fixing rod.

[0015] Optionally, sealing strips are installed on two sides in the length direction of the cover plate. When the cover plate is closed, the sealing strips are attached to the support plates.

[0016] Optionally, the mine explosion-proof cover device further includes two driving motors, and the two driving motors are respectively arranged corresponding to the two ropes. A second pulley is installed at the rotating end of the driving motor, and the rope passes through the counterweight and is connected to the second pulley.

[0017] Optionally, the mine explosion-proof cover device further includes two pressing blocks, and the two pressing blocks are respectively arranged corresponding to the two cover plates, and the pressing blocks can selectively press the cover plates when the cover plates are closed.

[0018] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0019] When a gas or coal dust explosion occurs in the mine, the shock wave will push the movable sides of the two cover plates to open towards each other, so that the cover plates can give way to the upward path of the shock wave, avoiding large deformation and displacement of the cover plates caused by the shock wave, and ensuring that the cover plates can still be used after being reset. Because the cover plates and the counterweights are connected by ropes and the first pulleys, the counterweights can be linked with the cover plates, which can reduce the downward force on the cover plates during the rotation and closing process, avoid violent impact between the cover plates and the wellhead, and further ensure that the cover plates can still be used after being reset.

[0020] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the following specific implementation manners, but do not constitute a limitation to the present disclosure. In the drawings:

[0022] Figure 1It is a schematic diagram of a mine explosion-proof cover device in a closed state shown according to an exemplary embodiment of the present disclosure.

[0023] Figure 2 It is a side view of a mine explosion-proof cover device in a closed state shown according to an exemplary embodiment of the present disclosure.

[0024] Figure 3 It is a top view of a mine explosion-proof cover device in a closed state shown according to an exemplary embodiment of the present disclosure.

[0025] Figure 4 It is a schematic diagram of a mine explosion-proof cover device in an open state shown according to an exemplary embodiment of the present disclosure.

[0026] Description of reference numerals

[0027] 10, wellhead; 100, cover plate; 200, mounting frame; 300, counterweight mechanism; 310, pulley block; 311, rope; 312, first pulley; 320, counterweight; 400, buffer mechanism; 510, support plate; 520, fixed rod; 600, drive motor; 610, second pulley; 710, pressing block. Detailed description of the specific implementation

[0028] The following will describe in detail the specific implementation of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only for the purpose of illustrating and explaining the present disclosure, and is not used to limit the present disclosure.

[0029] In the present disclosure, unless otherwise stated, the orientation terms such as "upper, lower, top" are defined for facilitating the description of the drawing direction according to the corresponding drawings, and "inner, outer" are defined according to the contour of the corresponding components. The terms such as "first, second" used in the present disclosure are used to distinguish one element from another, and do not have sequentiality and importance. In addition, when the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0030] Please refer to Figures 1 to 4, embodiments of the present disclosure provide a mine explosion-proof cover device, including a mounting frame 200, a counterweight mechanism 300, and two cover plates 100. Among them, the two cover plates 100 can jointly cover the wellhead 10. The two cover plates 100 are hinged in the middle of the wellhead 10 to form a fixed side, and the movable sides of the two cover plates 100 opposite to the fixed side can move towards each other to open the wellhead 10. The counterweight mechanism 300 can include two pulley groups 310 and two counterweight hammers 320. The two pulley groups 310 and the two counterweight hammers 320 can be respectively arranged in one-to-one correspondence with the two cover plates 100. The pulley group 310 can include a rope 311 and a first pulley 312 rotatably connected to the mounting frame 200. One end of the rope 311 can be connected to the cover plate 100, and the other end can be wound around the first pulley 312 and connected to the counterweight hammer 320. Further, the rope 311 can be connected to the cover plate 100 away from the hinge at the middle of the wellhead 10.

[0031] It can be understood that when a gas or coal dust explosion occurs in the mine, the shock wave will push the movable sides of the two cover plates 100 to open towards each other, so that the cover plates 100 can make way for the upward path of the shock wave, avoiding large deformation and displacement of the cover plates 100 caused by the shock wave, and ensuring that the cover plates 100 can still be used after reset. Because the cover plates 100 and the counterweight hammers 320 are connected by the ropes 311 and the first pulleys 312, the counterweight hammers 320 can be linked with the cover plates 100, which can reduce the downward force on the cover plates 100 during the rotation and closing process, avoiding violent impact between the cover plates 100 and the wellhead 10, and further ensuring that the cover plates 100 can still be used after reset.

[0032] In one embodiment, the mounting frame 200 can be located on the axis in the middle of the wellhead 10. The two first pulleys 312 can be coaxially arranged and rotatably installed on the mounting frame 200, saving a rotating shaft connecting a first pulley 312 to the mounting frame 200, and ensuring that the two cover plates 100 can be in a vertical state under the push of the shock wave. Specifically, because the two cover plates 100 are both hinged to the middle of the wellhead 10, and the mounting frame 200 hinged to the two first pulleys 312 can be located on the axis in the middle of the wellhead 10, the two cover plates 100 can rotate upward to be parallel to the mounting frame 200 under the action of the shock wave, that is, at this time, the two cover plates 100 are both vertical relative to the wellhead 10, avoiding excessive interference of the cover plates 100 with the upward path of the shock wave, thereby avoiding deformation and displacement of the cover plates 100 caused by the shock wave.

[0033] It should be noted that under normal circumstances, the mine can draw the air inside the mine to the outside of the mine under the action of the exhaust fan. Exhaust ventilation can reduce the ground temperature and humidity, making the working environment of miners more comfortable. At this time, the air pressure inside the mine is lower than that outside the mine. When a gas or coal dust explosion occurs in the mine, the air pressure inside the mine is much greater than that outside the mine. Since the exhaust fan cannot rotate in the reverse direction instantly, this will cause damage to the exhaust fan. By setting the cover plate 100 and the counterweight mechanism 300, the shock wave during a gas or coal dust explosion can leave the mine, thus avoiding the impact of the gas or coal dust explosion on the exhaust fan.

[0034] In one embodiment, the number of the counterweight mechanisms 300 and the mounting frames 200 can both be two, and they can be respectively installed on both sides of the cover plate 100 in the length direction, ensuring that both sides of the cover plate 100 can rotate and descend synchronously. At the same time, it is ensured that when one of the two counterweight mechanisms 300 is damaged, the other counterweight mechanism 300 can still play a role, that is, ensuring that the cover plate 100 can still descend slowly, avoiding damage to the wellhead 10 due to the too fast descending speed of the cover plate 100.

[0035] In one embodiment, at least one of the top surfaces of the two cover plates 100 can be provided with a buffer mechanism 400. The buffer mechanism 400 can be used to buffer the force when the two cover plates 100 are in contact with each other, avoiding deformation of the two cover plates 100 due to mutual impact. The top surface of the cover plate 100 refers to the side of the cover plate 100 away from the wellhead 10 when the cover plate 100 is located at the wellhead 10.

[0036] In this embodiment, the top surfaces of the two cover plates 100 are both provided with a buffer mechanism 400. By setting two sets of buffer mechanisms 400, the contact force between the two cover plates 100 can be more effectively reduced, avoiding deformation of the cover plates 100.

[0037] In one embodiment, the buffer mechanism 400 can include a plurality of springs and a plurality of rubber parts. The plurality of springs and the plurality of rubber parts can be distributed at intervals on the cover plate 100. The impact energy is absorbed by the compression of the springs, with a simple structure, reliable use and convenient maintenance. Both the springs and the rubber parts can buffer the contact force between the two cover plates 100.

[0038] In another embodiment, the buffer mechanism 400 can be a hydraulic buffer, which absorbs the impact energy through the flow of liquid, has a large energy absorption capacity, and works stably and reliably.

[0039] In one embodiment, the wellhead 10 can be configured to be square. The mine explosion-proof cover device can further include two support plates 510 respectively arranged on both sides of the length direction of the cover plate 100. Reinforcing ribs can be provided on the support plates 510. The two support plates 510 can be fixedly connected to the wellhead 10. The support plates 510 can be configured to be triangular, and the cover plate 100 can be configured to be square. When the cover plate 100 is closed, the cover plate 100 can overlap on two sides of the triangle, avoiding direct contact between both sides of the cover plate 100 and the wellhead 10, thereby preventing the wellhead 10 from being damaged.

[0040] In one embodiment, the mine explosion-proof cover device can further include a fixing rod 520. Both ends of the fixing rod 520 can be respectively connected to the two support plates 510. The two cover plates 100 can be hinged at the fixing rod 520, avoiding abrasion of the support plates 510 during the rotation of the cover plates 100. The fixing rod 520 can be square steel.

[0041] Furthermore, the cover plate 100 is connected to the fixing rod 520 through a plurality of opening and closing hinges. By providing a plurality of opening and closing hinges, the stability and reliability of the connection between the cover plate 100 and the fixing rod 520 can be enhanced.

[0042] In one embodiment, sealing strips can be installed on both sides of the length direction of the cover plate 100. When the cover plate 100 is closed, the sealing strips can be attached to the support plates 510, ensuring the sealing performance between the cover plate 100 and the support plates 510, and preventing the air inside the mine from leaving the mine through the gap between the support plates 510 and the cover plate 100 during mine air reversal.

[0043] In one embodiment, the mine explosion-proof cover device can further include two driving motors 600. The two driving motors 600 can be respectively arranged in one-to-one correspondence with the two ropes 311. A second pulley 610 can be installed at the rotating end of the driving motor 600. After passing through the counterweight 320, the rope 311 can be connected to the second pulley 610.

[0044] It can be understood that when a gas or coal dust explosion occurs in the mine, the driving motor 600 does not operate. When the cover plate 100 needs to be repaired, the driving motor 600 rotates to pull the counterweight 320 downward, causing the cover plate 100 to rotate upward to the repair position.

[0045] In one embodiment, the mine explosion-proof cover device can further include two pressing blocks 710. The two pressing blocks 710 can be respectively arranged in one-to-one correspondence with the two cover plates 100. The pressing blocks 710 can selectively press the cover plates 100 when the cover plates 100 are closed.

[0046] It can be understood that under normal circumstances, the mine exhausts air outwards, and at this time, one end of the pressing block 710 does not need to abut against the cover plate 100. When the mine needs to blow air inwards through the exhaust fan (i.e., reverse ventilation), one end of the pressing block 710 needs to abut against the cover plate 100 during reverse ventilation to prevent the air in the mine from leaving the mine through the gap between the cover plate 100 and the wellhead 10. After the reverse ventilation of the mine ends, the pressing block 710 does not abut against the cover plate 100 to ensure that when a gas explosion occurs in the mine, the cover plate 100 can be opened in time to relieve pressure.

[0047] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0048] In addition, it should be noted that each of the specific technical features described in the above specific embodiments can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0049] Furthermore, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A mine explosion-proof cover device, characterized in that: include: Two cover plates are jointly arranged on the wellhead, the two cover plates are hinged at the middle of the wellhead to form a fixed side, and the movable sides of the two cover plates opposite to the fixed side can move towards each other to open the wellhead; Mounting frame; as well as The counterweight mechanism includes two pulley blocks and two counterweight hammers, which are respectively arranged in one-to-one correspondence with the two cover plates. The pulley block includes a rope and a first pulley rotatably connected to the mounting frame. One end of the rope is connected to the cover plate, and the other end is wound around the first pulley and connected to the counterweight hammer.

2. The explosion-proof cover device for mines according to claim 1, characterized in that: The mounting frame is located on the axis of the middle part of the wellhead, and the two first pulleys are coaxially arranged and rotatably mounted on the mounting frame.

3. The explosion-proof cover device for mines according to claim 1, characterized in that: The number of the counterweight mechanism and the number of the mounting frame are both two, and they are respectively mounted on both sides of the cover plate in the length direction.

4. The explosion-proof cover device for mines according to claim 1, characterized in that: A buffer mechanism is provided on the top surface of at least one of the two cover plates, and the buffer mechanism is used to buffer the force of the two cover plates abutting against each other.

5. The explosion-proof cover device for mines according to claim 4, characterized in that: The buffer mechanism comprises a plurality of springs and a plurality of rubber members, and the plurality of springs and the plurality of rubber members are distributed on the cover plate at intervals.

6. The explosion-proof cover device for mines according to claim 1, characterized in that: The wellhead is configured in a square shape, and the mine explosion-proof cover device also includes two support plates respectively arranged on both sides of the length direction of the cover plate, the two support plates are fixedly connected to the wellhead, the support plates are configured in a triangle shape, and the cover plate is configured in a square shape. When the cover plate is closed, the cover plate overlaps the two sides of the triangle.

7. The explosion-proof cover device for mines according to claim 6, characterized in that: The explosion-proof cover device for mining further comprises a fixing rod, two ends of which are respectively connected to the two support plates, and the two cover plates are hinged at the fixing rod.

8. The explosion-proof cover device for mines according to claim 6, characterized in that: Sealing strips are installed on both sides of the cover plate in the length direction. When the cover plate is closed, the sealing strips are in contact with the support plate.

9. The explosion-proof cover device for mines according to claim 1, characterized in that: The mine explosion-proof cover device also includes two driving motors, and the two driving motors are respectively arranged in one-to-one correspondence with the two ropes. A second pulley is installed at the rotating end of the driving motor, and the rope is connected to the second pulley after passing through the counterweight hammer.

10. The explosion-proof cover device for mines according to claim 1, characterized in that: The mine explosion-proof cover device also includes two pressing blocks, which are respectively arranged in one-to-one correspondence with the two cover plates, and the pressing blocks can selectively press the cover plates when the cover plates are closed.

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