Automatic reset type explosion-proof cover of mine return air shaft

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By designing the automatic reset explosion-proof cover of the mining return air shaft and adopting structures such as fixtures, sliders, sliders and buffer mechanisms, the problem that the existing explosion-proof cover cannot be automatically reset after explosion is solved, and the automatic reset of the explosion-proof cover is achieved and accurate placement reduces the consequences of accidents and the risk of equipment damage.

CN222436404UActive Publication Date: 2025-02-07黑龙江龙煤双鸭山矿业有限责任公司

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Patent Information

Application Number: CN202421224769.7
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-31
Publication Date: 2025-02-07
Estimated Expiration: 2034-05-31

AI Technical Summary

Technical Problem

The existing explosion-proof cover cannot be reset automatically and effectively after explosion, resulting in the impact of the ventilation system and the explosion-proof cover is prone to damage and misalignment, increasing the consequences of the accident.

Method used

A mining return air shaft automatic reset explosion-proof cover is designed, adopting a fixture, chute, slider, buffer mechanism and other structures. The impact force is buffered by the buffer spring and damping rod, and the slider and slider are used to guide the reset track. Ensure that the explosion-proof cover is reset accurately.

Benefits of technology

The explosion-proof cover is automatically reset after explosion, avoiding the impact of the ventilation system, reducing the risk of damage and misalignment of the explosion-proof cover, and extending the service life of the explosion-proof cover.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a mining return air shaft automatic reset type explosion-proof cover which comprises a ground platform, a mine and an explosion-proof cover body, the mine is arranged above the ground platform, the explosion-proof cover body covers the top of the mine, a fixing frame is installed on the top of the ground platform, and first sliding grooves are formed in the four inner walls of the fixing frame. Four connecting plates are installed on the outer wall of the anti-explosion cover body, a first sliding block is installed at one end of each connecting plate, a first buffering mechanism is arranged at the top of the anti-explosion cover body, and a second buffering mechanism is arranged on the ground platform. According to the explosion-proof cover, explosion occurs in a mine, impact waves generated by explosion push the explosion-proof cover body to move upwards, the first buffer mechanism buffers and releases impact force generated upwards by the explosion-proof cover body, and the situation that the explosion-proof cover body moves upwards by a too large distance is avoided; and the problem that the top of the explosion-proof cover body directly collides with the fixing frame to cause damage can be avoided, and the good protection effect on the explosion-proof cover body is achieved.

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Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof covers, in particular to an automatic reset explosion-proof cover for a mine return air shaft. Background Art

[0002] At present, all qualified coal mines in my country are required to install explosion-proof doors and covers to protect the main fans from damage when the explosion shock wave arrives. During normal ventilation, it is used to isolate the underground airflow from the ground atmosphere, prevent airflow short circuit, and ensure the normal operation of the ventilation system; when a gas or coal dust explosion occurs underground, the explosion-proof door will be opened by the explosion airflow, and the shock wave will be directly discharged to the outside atmosphere on the ground, thereby playing a pressure relief role and preventing the main fans from being damaged by the impact of the explosion airflow. However, once the explosion-proof doors and covers are opened by the shock wave generated by the explosion, it will directly affect the normal operation of the subsequent ventilation system, further worsening the consequences of the accident.

[0003] The explosion-proof covers in the prior art are mostly heavy structures. After the explosion-proof covers are blown open by the explosion shock wave, they cannot be automatically and effectively reset at the top of the mine in a short period of time. Moreover, the explosion-proof covers will collide with the equipment near the mine after being blown open, causing damage to the explosion-proof covers. The explosion-proof covers will deviate from their original positions during movement in the air and cannot be accurately reset, which can easily cause air leakage in the explosion-proof covers. The explosion-proof covers will also collide with the top of the mine after moving downward to reset, causing secondary damage to the explosion-proof covers themselves, making the entire explosion-proof cover reset process more dangerous. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes an automatic reset explosion-proof cover for a mine return air shaft.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A mine return air shaft automatic reset explosion-proof cover comprises a ground platform, a mine and an explosion-proof cover body, wherein the mine is arranged above the ground platform, the explosion-proof cover body is arranged on the top of the mine, a fixing frame is installed on the top of the ground platform near the mine, four inner walls of the fixing frame are provided with a first slide groove, four connecting plates are installed on the outer wall of the explosion-proof cover body, and a first sliding block adapted to the first slide groove is installed at one end of the four connecting plates away from the explosion-proof cover body, a first buffer mechanism is arranged between the top of the explosion-proof cover body and the fixing frame, and a second buffer mechanism is arranged between the ground platform and two of the connecting plates.

[0007] Preferably, second slide grooves are formed on the inner walls on the other two sides of the fixing frame, and second sliding blocks are installed inside the two second slide grooves. The ends of the two second sliding blocks away from the second slide grooves are commonly connected to a counterweight block.

[0008] Preferably, two pulleys are rotatably mounted on the top of the fixing frame, a steel wire rope is mounted on the top of the counterweight, the outer wall of the steel wire rope is slidably matched with the outer walls of the two pulleys, and one end of the steel wire rope away from the counterweight is connected to the explosion-proof cover body.

[0009] Preferably, the first buffer mechanism comprises a fixing plate mounted on the top of the explosion-proof cover body, a first buffer spring is mounted at the center of the top of the fixing plate, and a first buffer block is mounted at the top of the first buffer spring.

[0010] Preferably, a plurality of first damping rods are installed at the bottom of the fixing frame, and the bottom ends of the plurality of first damping rods are all connected to the fixing plate.

[0011] Preferably, the second buffer mechanism includes a second buffer block arranged below the two connecting plates, two rotating rods are rotatably installed on the bottom end of the buffer block, and two bottom plates are installed on the top of the ground platform directly below the two second buffer blocks, sliding rods are installed inside the two bottom plates, sliding blocks are slidably installed on the outer walls of the two sliding rods, and the bottom ends of the two rotating rods are rotatably connected to the sliders close to them.

[0012] Preferably, a second buffer spring is sleeved on the outer wall of the sliding rod, two ends of the second buffer spring are respectively connected to the two sliding blocks, and a second damping rod is arranged between the two rotating rods.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In the utility model, after an explosion occurs inside a mine and the shock wave generated by the explosion pushes the explosion-proof cover body to move upward rapidly inside the fixed frame, the first buffer block arranged on the top of the explosion-proof cover body collides with the inner top surface of the fixed frame, driving the first buffer spring to deform and contract, and at the same time driving the telescopic ends of multiple first damping rods to contract, thereby buffering and releasing the impact force generated by the explosion-proof cover body upward, avoiding the explosion-proof cover body from moving upward too far, and avoiding the problem of damage caused by direct collision between the top of the explosion-proof cover body and the fixed frame, thereby having a good protective effect on the explosion-proof cover body.

[0015] In the utility model, after the shock wave generated by the explosion inside the mine dissipates, the explosion-proof cover body automatically moves downward to the top of the mine through the resetting of the first buffer spring and multiple first damping rods, thereby achieving the effect of automatic resetting; since the explosion-proof cover body can slide downward inside the first slide groove through multiple first sliding blocks arranged on the outer wall during the downward movement and resetting process, the downward movement trajectory of the explosion-proof cover body is guided and limited, ensuring that the explosion-proof cover body can accurately fall on the top of the mine, avoiding the problem of misalignment between the explosion-proof cover body and the top of the mine after falling back.

[0016] In the utility model, after the impact force generated by the explosion inside the mine disappears, the explosion-proof cover body falls back downward, so that the bottom ends of two connecting plates press the top ends of two second buffer blocks below, and the impact force generated by the rapid downward fall of the explosion-proof cover body is buffered and released by means of the second buffer mechanism, thereby avoiding the explosion-proof cover body from directly colliding with the top of the mine downward, causing damage to the bottom of the explosion-proof cover body and the top of the mine, further protecting the explosion-proof cover body and extending the life of the explosion-proof cover body during actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an automatic reset explosion-proof cover for a mine return air shaft proposed by the utility model;

[0018] Figure 2 for Figure 1 Structural sectional view of the middle fixing frame;

[0019] Figure 3 It is a structural schematic diagram of the fixing frame in the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the utility model without the fixing frame;

[0021] Figure 5 for Figure 1 A schematic diagram of the structure in which the mine and the second buffer mechanism are removed;

[0022] Figure 6 It is a structural schematic diagram of the mine and the second buffer mechanism in the utility model;

[0023] Figure 7 It is a structural schematic diagram of the second buffer mechanism in the utility model.

[0024] In the figure: 1. ground platform; 2. mine; 3. explosion-proof cover body; 4. fixed frame; 5. counterweight; 6. pulley; 7. wire rope; 8. second slide groove; 9. first slide groove; 10. second slider; 11. first slider; 12. bottom plate; 13. first damping rod; 14. first buffer block; 15. first buffer spring; 16. fixed plate; 17. connecting plate; 18. second buffer block; 19. rotating rod; 20. second damping rod; 21. sliding rod; 22. second buffer spring; 23. sliding block. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Reference Figure 1-Figure 7A mine return air shaft automatic reset explosion-proof cover comprises a ground platform 1, a mine 2 and an explosion-proof cover body 3. The mine 2 is arranged above the ground platform 1, and the explosion-proof cover body 3 is arranged on the top of the mine 2. A fixing frame 4 is installed on the top of the ground platform 1 near the mine 2. The four inner walls of the fixing frame 4 are provided with a first slide groove 9. Four connecting plates 17 are installed on the outer wall of the explosion-proof cover body 3. The ends of the four connecting plates 17 away from the explosion-proof cover body 3 are all provided with a first slider 11 adapted to the first slide groove 9. A first buffer mechanism is arranged between the top of the explosion-proof cover body 3 and the fixing frame 4, and a second buffer mechanism is arranged between the ground platform 1 and two of the connecting plates 17.

[0027] As a technical optimization solution in the present invention, the inner walls on the other two sides of the fixing frame 4 are provided with second slide grooves 8, and the second sliders 10 are installed inside the two second slide grooves 8. The ends of the two second sliders 10 away from the second slide grooves 8 are commonly connected to the counterweight 5. The counterweight 5 is arranged to move up and down in the second slide grooves 8 through the second sliders 10, and the up and down movement trajectory of the counterweight 5 can be guided and limited.

[0028] As a technical optimization solution in the utility model, two pulleys 6 are rotatably installed on the top of the fixed frame 4, and a steel wire rope 7 is installed on the top of the counterweight block 5. The outer wall of the steel wire rope 7 is slidably matched with the outer walls of the two pulleys 6, and the end of the steel wire rope 7 away from the counterweight block 5 is connected to the explosion-proof cover body 3. The counterweight block 5 and the explosion-proof cover body 3 are connected by the steel wire rope 7, and after the explosion-proof cover body 3 is moved upward by the impact force generated by the explosion, the counterweight block 5 can be driven to move downward, and after the impact force disappears, the explosion-proof cover body 3 can quickly fall back to the top of the mine 2.

[0029] As a technical optimization solution in the utility model, the first buffer mechanism includes a fixed plate 16 installed on the top of the explosion-proof cover body 3, a first buffer spring 15 is installed at the center of the top of the fixed plate 16, and a first buffer block 14 is installed at the top of the first buffer spring 15.

[0030] As a technical optimization solution in the utility model, a plurality of first damping rods 13 are installed at the bottom of the fixing frame 4, and the bottom ends of the plurality of first damping rods 13 are connected to the fixing plate 16. The first buffer mechanism can buffer and release the impact force when the explosion-proof cover body 3 moves upward under the impact force, so as to avoid the explosion-proof cover body 3 from moving upward too far and reduce the probability of damage to the explosion-proof cover body 3 itself.

[0031] As a technical optimization solution in the utility model, the second buffer mechanism includes a second buffer block 18 arranged under the two connecting plates 17, and two rotating rods 19 are rotatably installed on the bottom end of the buffer block. The top of the ground platform 1 is located directly below the two second buffer blocks 18 and has two bottom plates 12 installed. Sliding rods 21 are installed inside the two bottom plates 12, and sliding blocks 23 are slidably installed on the outer walls of the two sliding rods 21. The bottom ends of the two rotating rods 19 are rotatably connected to the sliders close to them.

[0032] As a technical optimization solution in the utility model, the outer wall of the slide bar 21 is provided with a second buffer spring 22, the two ends of the second buffer spring 22 are respectively connected to the two sliding blocks 23, and a second damping rod 20 is arranged between the two rotating rods 19. After the impact force disappears, the explosion-proof cover body 3 falls back downward, so that the bottom ends of the two connecting plates 17 press the top ends of the two second buffer blocks 18 below, and move in a direction away from each other through the two rotating rods 19, driving the second buffer spring 22 to stretch, buffering and releasing the impact force generated by the rapid downward fall of the explosion-proof cover body 3, and avoiding the explosion-proof cover body 3 directly colliding with the top of the mine 2, causing damage to the bottom of the explosion-proof cover body 3 and the top of the mine 2.

[0033] In the utility model, after an explosion occurs inside the mine 2 and the shock wave generated by the explosion pushes the explosion-proof cover body 3 to move upward quickly inside the fixed frame 4, the wire rope 7 can drive the counterweight 5 to move downward, and the first buffer block 14 arranged on the top of the explosion-proof cover body 3 collides with the inner top surface of the fixed frame 4, driving the first buffer spring 15 to deform and shrink, and at the same time driving the telescopic ends of multiple first damping rods 13 to shrink, buffering and releasing the impact force generated upward by the explosion-proof cover body 3, avoiding the explosion-proof cover body 3 from moving upward too far, and avoiding the problem of damage caused by direct collision between the top of the explosion-proof cover body 3 and the fixed frame 4, which has a good protective effect on the explosion-proof cover body 3.

[0034] After the shock wave generated by the explosion inside the mine 2 dissipates, the explosion-proof cover body 3 can pull the counterweight block 5 upward and reset by its own gravity, and after the counterweight block 5 moves upward and resets, the explosion-proof cover body 3 automatically moves downward to the top of the mine 2 through the reset of the first buffer spring 15 and multiple first damping rods 13, thereby achieving the effect of automatic reset; since the explosion-proof cover body 3 can slide downward inside the first slide groove 9 through multiple first sliding blocks 11 arranged on the outer wall during the process of moving downward and resetting, the downward movement trajectory of the explosion-proof cover body 3 can be guided and limited by the downward sliding of the multiple first sliding blocks 11 inside the first slide groove 9, ensuring that the explosion-proof cover body 3 can accurately fall on the top of the mine 2, avoiding the problem of misalignment between the explosion-proof cover body 3 and the top of the mine 2 after falling back.

[0035] After the impact force generated by the explosion inside the mine 2 disappears, the explosion-proof cover body 3 falls back downward, so that the bottom ends of the two connecting plates 17 press the top ends of the two second buffer blocks 18 below, driving the two rotating rods 19 to move in opposite directions, thereby driving the second buffer spring 22 arranged between the two sliding blocks 23 to be in a stretched state, and the telescopic end of the second damping rod 20 between the two rotating rods 19 is also in an extended state. The extension of the telescopic end of the second damping rod 20 cooperates with the pull rope of the second buffer spring 22, which can buffer and release the impact force generated by the rapid downward fall of the explosion-proof cover body 3, avoiding the explosion-proof cover body 3 directly colliding with the top of the mine 2 downward, causing damage to the bottom of the explosion-proof cover body 3 and the top of the mine 2, further protecting the explosion-proof cover body 3 and extending the life of the explosion-proof cover body 3 in actual use.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic reset explosion-proof cover for a mine return air shaft, comprising a ground platform (1), a mine shaft (2) and an explosion-proof cover body (3), characterized in that: The mine (2) is arranged above the ground platform (1), the explosion-proof cover body (3) is arranged on the top of the mine (2), a fixing frame (4) is installed on the top of the ground platform (1) close to the mine (2), four inner walls of the fixing frame (4) are provided with first slide grooves (9), four connecting plates (17) are installed on the outer wall of the explosion-proof cover body (3), and first sliding blocks (11) adapted to the first slide grooves (9) are installed at one end of the four connecting plates (17) away from the explosion-proof cover body (3), a first buffer mechanism is arranged between the top of the explosion-proof cover body (3) and the fixing frame (4), and a second buffer mechanism is arranged between the ground platform (1) and two of the connecting plates (17).

2. The automatic reset explosion-proof cover for a mine return air shaft according to claim 1 is characterized in that: The inner walls of the other two sides of the fixing frame (4) are provided with second slide grooves (8), and second sliding blocks (10) are installed inside the two second slide grooves (8). The ends of the two second sliding blocks (10) away from the second slide grooves (8) are commonly connected to a counterweight block (5).

3. The automatic reset explosion-proof cover for a mine return air shaft according to claim 2 is characterized in that: Two pulleys (6) are rotatably mounted on the top of the fixing frame (4), a steel wire rope (7) is mounted on the top of the counterweight (5), the outer wall of the steel wire rope (7) is slidably matched with the outer walls of the two pulleys (6), and one end of the steel wire rope (7) away from the counterweight (5) is connected to the explosion-proof cover body (3).

4. The automatic reset explosion-proof cover for a mine return air shaft according to claim 1 is characterized in that: The first buffer mechanism comprises a fixing plate (16) mounted on the top of the explosion-proof cover body (3), a first buffer spring (15) is mounted at the center of the top of the fixing plate (16), and a first buffer block (14) is mounted on the top of the first buffer spring (15).

5. The automatic reset explosion-proof cover for a mine return air shaft according to claim 4 is characterized in that: A plurality of first damping rods (13) are mounted on the bottom of the fixing frame (4), and the bottom ends of the plurality of first damping rods (13) are all connected to the fixing plate (16).

6. The automatic reset explosion-proof cover for a mine return air shaft according to claim 1, characterized in that: The second buffer mechanism comprises a second buffer block (18) arranged below the two connecting plates (17), two rotating rods (19) being rotatably mounted on the bottom end of the buffer block, two bottom plates (12) being mounted on the top of the ground platform (1) directly below the two second buffer blocks (18), sliding rods (21) being mounted inside the two bottom plates (12), sliding blocks (23) being slidably mounted on the outer walls of the two sliding rods (21), and the bottom ends of the two rotating rods (19) being rotatably connected to sliders adjacent thereto.

7. The automatic reset explosion-proof cover for a mine return air shaft according to claim 6, characterized in that: A second buffer spring (22) is sleeved on the outer wall of the sliding rod (21), and two ends of the second buffer spring (22) are respectively connected to two sliding blocks (23), and a second damping rod (20) is arranged between the two rotating rods (19).