Follow-up safety device integrated on hydraulic support

Abstract

The invention relates to the technical field of coal mine safety, and discloses a follow-up safety device integrated on a hydraulic support, which comprises a hydraulic support and a front plate rotationally connected to the hydraulic support, and further comprises a coordination mechanism, and the coordination mechanism comprises a first carrier plate fixedly connected to the surface of the front plate; a pair of fixedly connected incomplete racks and a flow guide mechanism are oppositely arranged on the surface of the first carrying plate, the flow guide mechanism comprises a second carrying plate fixedly connected into the hydraulic support, and two water passing pipes with opposite inclination directions are arranged, so that when the coal mining machine does not reach a specific area, one group of water passing pipes are started and incline towards the gravity center direction of a coal wall, and the other group of water passing pipes incline towards the gravity center direction of the coal wall; a high-concentration halogen salt stopping agent is intensively jetted, a high-concentration gas leakage crack area which is expected to be generated when a coal wall is cut is treated, advanced treatment and source inhibition are achieved, and when a coal mining machine cuts and passes through the area, the coal briquettes falling onto a conveying belt are inhibited and attached in cooperation with the withdrawing action of a front plate of a hydraulic support and the angle adjustment of a current water passing pipe.

Description

Technical Field

[0001] This invention relates to the field of coal mine safety technology, specifically to a follow-up safety device integrated into a hydraulic support. Background Technology

[0002] During coal mining in a fully mechanized longwall face, hydraulic supports and coal mining machines need to work together. When the coal mining machine is about to reach the position of a hydraulic support, the guard plate at the front end of the support, which is connected to the main body of the support at a 90-degree angle, will rotate to make way and avoid obstructing the movement of the coal mining machine.

[0003] When a coal cutter is working in the direction of coal mining, methane gas is continuously released within the coal mine during the tunneling process. This is especially true in tunneling faces with relatively poor ventilation, where methane accumulation layers easily form at the top of the roadway. The methane volume is relatively large at the coal cutting point (near the coal cutter drum), which is the "source" of methane production. When the coal cutter drum cuts the coal wall, it instantly pulverizes and exposes a large amount of fresh coal. The methane gas that was originally in an adsorbed state in the coal seam is rapidly desorbed and released, surging into the working face space.

[0004] However, since this area is not a major ventilation channel, the airflow is weak or even stagnant. The slowly released gas is difficult to remove in time, which can lead to unnecessary safety hazards. Furthermore, when the coal mining machine cuts coal, it generates a large amount of new, broken coal dust and fragments, which are fed into the conveyor belt under the support. The contact area between the broken coal and oxygen increases significantly, the oxidation reaction rate accelerates, and a large amount of heat can be generated in a short time. If the heat gradually accumulates in the goaf, it can easily cause spontaneous combustion of coal, further exacerbating the safety risks of the mine. Summary of the Invention

[0005] The purpose of this invention is to provide a follow-up safety device integrated into a hydraulic support to solve the problem mentioned in the background art, which is that gas is continuously released during the tunneling process, especially when the ventilation conditions at the tunneling face are relatively poor, leading to potential dangers.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a follow-up safety device integrated into a hydraulic support, comprising a hydraulic support and a front plate rotatably connected to the hydraulic support, and a coordination mechanism, wherein the coordination mechanism includes a first carrier plate fixedly connected to the surface of the front plate, and a pair of incomplete racks fixedly connected to each other on the surface of the first carrier plate; a flow guiding mechanism, wherein the flow guiding mechanism includes a second carrier plate fixedly connected inside the hydraulic support, and a liquid delivery component and a gas delivery component fixedly connected to the surface of the second carrier plate; a steering mechanism, wherein the steering mechanism includes a carrier fixedly connected inside the hydraulic support near the center of gravity of the ground surface, and a reciprocating rod slidably connected inside the carrier; a conversion component, disposed inside the carrier, which, in the working state, responds to the rotation of the incomplete racks and generates a corresponding rotation according to its execution distance; and a safety component, disposed at both ends of the reciprocating rod.

[0007] The liquid delivery component includes a diversion chamber 1 fixedly connected to the second surface of the carrier plate. A diversion pipe 1 is fixedly connected to both sides of the inner wall of the diversion chamber 1. A liquid passage hole is opened on the surface of the diversion pipe 1. A long pipe is threadedly connected inside the liquid passage hole.

[0008] The air supply component includes a flow-dividing chamber two fixedly connected to the surface of the carrier plate two, and a flow-dividing pipe two fixedly connected inside the flow-dividing chamber two.

[0009] The two ends of the diverter are fixedly connected to the surfaces of the two diverter tubes, and a one-way valve to prevent fluid backflow is fixedly connected at the end of each diverter tube that extends into the interior of the diverter tube.

[0010] The conversion assembly includes a threaded rod rotatably connected inside the carrier, with gears fixedly connected to both ends of the threaded rod, and a moving block threadedly connected to the surface of the threaded rod.

[0011] The moving block is fixedly connected to the reciprocating rod inside, and the surface of the moving block is constrained by the inside of the carrier, so that the moving block slides in the cavity inside the carrier.

[0012] The safety component includes fixed rods at both ends of the reciprocating rod, a curved rod rotatably connected to the surface of the fixed rod, a connecting block rotatably connected inside the curved rod, a water pipe fixedly connected to the end of the connecting block, an atomizing nozzle fixedly connected inside the water pipe, a gas probe fixedly connected to the surface of the connecting block, and an electrically controlled water valve installed in each water pipe near the atomizing nozzle.

[0013] One end of the diversion pipe is fixedly connected to the inside of the water pipe, and one side of the connecting block is rotatably connected to the hydraulic support.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] By using two water pipes with opposite inclinations, one set of water pipes is activated before the coal mining machine reaches a specific area. It tilts towards the center of gravity of the coal face, spraying a concentrated high-concentration brine inhibitor to treat the high-concentration gas leakage cracks expected during coal cutting, achieving proactive treatment and source suppression. When the coal mining machine cuts through this area, in conjunction with the retraction of the hydraulic support's front plate, the current water pipe adjusts its angle, changing the high-speed direct spray into a scattered mist, inhibiting the adhesion of coal chunks falling onto the conveyor belt. Simultaneously, the fine water mist effectively extinguishes dust generated by the collision of falling coal chunks. The other set is activated, ensuring that during the coordinated operation of multiple hydraulic support groups, one spray unit always focuses on proactive treatment at the cutting point, while the other unit is responsible for dust suppression and inhibition at the coal drop point and on the conveyor belt, achieving simultaneous prevention of gas leaks, spontaneous combustion, and dust.

[0016] Furthermore, the gas probe always has one side facing the top of the roadway for detection. When a gas anomaly is detected, nitrogen is injected into the second diversion pipe and then sprayed out from the water pipe. The nitrogen pressure serves as one of the power sources and is introduced into the inhibitor delivery pipeline, i.e., the water pipe. The high-pressure nitrogen gas flow comes into contact with the halide inhibitor solution, causing the liquid to break into fine droplets, achieving instantaneous and uniform mixing and high-speed delivery of the two. This increases the total contact surface area between the inhibitor and the coal body, effectively covering a large area of ​​leakage. Even if one of the pumps fails, the high-pressure nitrogen can still independently complete the inerting and atomization boosting tasks, enhancing safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall device of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the hydraulic support of the present invention;

[0019] Figure 3 This is a schematic diagram of the isolated coordination mechanism of the present invention;

[0020] Figure 4 This is a bottom view schematic diagram of the hydraulic support structure of the present invention;

[0021] Figure 5 This is a second schematic diagram of the hydraulic support structure of the present invention from a bottom view;

[0022] Figure 6 This invention relates to a steering mechanism and a flow guiding mechanism;

[0023] Figure 7 This is a cross-sectional schematic diagram of the steering mechanism of the present invention.

[0024] In the diagram: 100, hydraulic support; 101, front plate; 200, coordination mechanism; 201, carrier plate one; 202, incomplete rack; 300, flow guiding mechanism; 301, carrier plate two; 310, flow divider chamber one; 311, flow divider pipe one; 320, flow divider chamber two; 321, flow divider pipe two; 400, steering mechanism; 401, carrier; 402, reciprocating rod; 410, threaded rod; 411, gear; 412, moving block; 413, water pipe; 414, gas probe; 4101, fixed rod; 4111, curved rod; 4122, connecting block. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention discloses a follow-up safety device integrated into a hydraulic support, comprising a hydraulic support 100 and a front plate 101 rotatably connected to the hydraulic support 100, a coordination mechanism 200, a carrier plate 201 fixedly connected to the surface of the front plate 101, a pair of incomplete racks 202 fixedly connected to each other on the surface of the carrier plate 201, a flow guiding mechanism 300, a carrier plate 301 fixedly connected inside the hydraulic support 100, a liquid delivery component and a gas delivery component fixedly connected to the surface of the carrier plate 301, a steering mechanism 400, a carrier 401 fixedly connected inside the hydraulic support 100 near the center of gravity of the ground, a reciprocating rod 402 slidably connected inside the carrier 401, a conversion component disposed inside the carrier 401, which, in the working state, responds to the rotation of the incomplete racks 202 and generates corresponding rotation according to its execution distance, and a safety component disposed at both ends of the reciprocating rod 402.

[0027] The liquid delivery component includes a diversion chamber 310 fixedly connected to the surface of the carrier plate 301. Diversion pipes 311 are fixedly connected to both sides of the inner wall of the diversion chamber 310. Liquid passage holes are opened on the surface of the diversion pipes 311, and long pipes are threadedly connected inside the liquid passage holes.

[0028] During use, the diversion chamber 310 distributes the liquid introduced into the long tube to the two diversion pipes 311, and then the liquid is sent to the water pipe 413 by the diversion pipes 311 and then sprayed out.

[0029] The air supply component includes a flow distribution chamber 320 fixedly connected to the surface of the carrier plate 301, and a flow distribution pipe 321 fixedly connected inside the flow distribution chamber 320.

[0030] The ends of the second diverter pipe 321 are fixedly connected to the surfaces of the two first diverter pipes 311, and a one-way valve to prevent fluid backflow is fixedly connected at the end of each second diverter pipe 321 that extends into the first diverter pipe 311.

[0031] The two diversion pipes 321 work together with the corresponding diversion pipe 311. When the diversion pipe 311 is working, a one-way valve is used to prevent backflow into the diversion pipe 321.

[0032] The conversion assembly includes a threaded rod 410 rotatably connected inside the carrier 401, with gears 411 fixedly connected to both ends of the threaded rod 410, and a moving block 412 threadedly connected to the surface of the threaded rod 410.

[0033] In the initial state, gear 411 is not in contact with the incomplete rack 202. In the working state, gear 411 is driven to rotate by the movement of the incomplete rack 202, which in turn drives the threaded rod 410 to rotate. This causes the threaded rod 410 to drive the moving block 412 to start working, and the moving block 412 drives the reciprocating rod 402 to reciprocate along the length of the threaded rod 410.

[0034] The inside of the moving block 412 is fixedly connected to the reciprocating rod 402. The surface of the moving block 412 is constrained by the inside of the carrier 401, so that the moving block 412 slides in the cavity inside the carrier 401.

[0035] The safety components include fixed rods 4101 fixed at both ends of the reciprocating rod 402, a curved rod 4111 rotatably connected to the surface of the fixed rod 4101, a connecting block 4122 rotatably connected inside the curved rod 4111, a water pipe 413 fixedly connected to the end of the connecting block 4122, an atomizing nozzle fixedly connected inside the water pipe 413, a gas probe 414 fixedly connected to the surface of the connecting block 4122, and an electrically controlled water valve installed in each water pipe 413 near the atomizing nozzle.

[0036] During use, when the reciprocating rod 402 drives the fixed rod 4101 to move toward one of the water pipes 413, it will drive the curved rod 4111 in this area to drive the connecting block 4122 to lift. The connecting block 4122 is rotatably connected to the hydraulic support 100, restricting it to swing up and down only toward the center of gravity of the ground, thus driving the water pipe 413 to work. When the reciprocating rod 402 is pulled away from the water pipe 413 in the current area by the moving block 412, the water pipe 413 rotates toward the center of gravity of the ground, and at the same time, the water speed of the water pipe 413 in the current area increases.

[0037] It should be noted that the two water pipes 413 always move in opposite directions. In the initial state, that is, when the incomplete rack 202 has not driven the gear 411 to rotate, the water pipe 413 facing the coal cutter is facing the direction of the earth's center of gravity, and the other water pipe 413 is in a closed state. After the coal cutter passes, the two water pipes 413 work at the same time. The water pipe 413 facing the direction of the earth's center of gravity drives the gear 411 through the incomplete rack 202 to drive the moving block 412, so that the moving block 412 drives the reciprocating rod 402 to slide in the carrier 401. While rotating the water pipe 413 that is inclined towards the earth's surface in the opposite direction, it also drives the other water pipe 413 to rotate towards the direction of the earth's center of gravity.

[0038] The end of the diversion pipe 311 is fixedly connected to the inside of the water pipe 413, and one side of the connecting block 4122 is rotatably connected to the hydraulic support 100.

[0039] Working principle:

[0040] Preparation work, connect the pump body to such Figure 5 The long pipe at the liquid passage shown is then used to connect a nitrogen tank or nitrogen generator into the second distribution chamber 320, and the pipe supplying nitrogen toward the second distribution chamber 320 is closed.

[0041] See Figure 1 ,as well as Figure 7 The coal cutter moves towards the front plate 101 to cut coal. At this time, the water pipe 413 on the surface of the hydraulic support 100 near the coal cutting point is tilted towards the direction of the ground's center of gravity. The electric water valve inside this water pipe 413 is open, while the other water pipe 413 remains closed. Due to the downward tilt of this water pipe 413, the other water pipe 413 tilts in the opposite direction, closer to the top of the tunnel. The gas probe 414 at this location begins real-time monitoring of the top of the tunneling area and wirelessly transmits the data to the office area. (See reference...) Figure 5After the pump body delivers the halide salt inhibitor into the distribution chamber 310, it exits through one of the working distribution pipes 311. The halide salt inhibitor then flows through the distribution pipe 311 into the water pipe 413, and is subsequently delivered through the atomizing nozzles in this area. Because this direction is close to the coal cutter, the water pipe 413, which is inclined towards the center of gravity of the ground, has a high flow velocity. During coal cutting, the inhibitor is sprayed at high speed and precisely onto the newly exposed surface of the fresh coal and the high-temperature cutting point, immediately cooling it and forming a protective film on its surface, greatly reducing its initial oxidation reaction rate. This immediately suppresses the tendency for spontaneous combustion when the coal is "born." When passing the front plate 101 of the hydraulic support 100, the front plate 101 rotates and retracts towards the hydraulic support 100 to avoid the operation of the coal cutter. As the front plate 101 rotates, the incomplete rack 202 on the carrier plate 201 begins to work. The incomplete rack 202 contacts the gears 411 at both ends of the threaded rod 410, causing the gears 411 to drive the threaded rod 410 to rotate inside the carrier 401. The moving block 412 works towards the working water pipe 413. When the front plate 101 is retracted to its maximum angle, the water pipe 413, which is tilted towards the direction of the ground's center of gravity, shifts in the opposite direction, that is, it rotates closer to the top of the roadway. At this point, the angle of the water pipe 413 is raised, and the cutting... As the coal cutter moves away from the hydraulic support 100 at this location and towards the next hydraulic support 100, it performs coal cutting operations. Simultaneously, due to the raised angle of the water pipe 413, when these coal chunks fall onto the conveyor belt, the raised water pipe 413 forms an evenly distributed "inhibitor mist," providing secondary treatment to the coal chunks. This ensures that the inhibitor covers all sides of the coal chunks, especially areas that may not have been covered in the initial spray, resulting in highly efficient dust suppression and agglomeration effect. A large amount of coal dust accumulates on the tunnel floor, supports, and equipment due to the vibration caused by the collision between the coal chunks and the conveyor belt. The "mist" formed by the enveloping spray evenly moistens this deposited coal dust, increasing its weight and viscosity. By "sticking" it to the base plate, it is effectively prevented from flying away again. At the same time, due to the raised angle of the water pipe 413 here, the other water pipe 413 is lowered, and the electric water valve here is activated. The water pipe 413 here sprays a long distance towards the coal cutting area of ​​the coal cutter, so that the two adjacent water pipes 413 always maintain opposite tilt angles. The water pipes 413 on the two adjacent hydraulic supports 100 also always maintain opposite angles. This ensures that when the coal cutter is working, there is always at least one high-speed direct-injection water pipe 413 to assist in cooling its working area, as well as at least one auxiliary mist covering the coal conveying area.

[0042] When the gas probes 414 on both sides of the hydraulic support 100 detect a gas leak, the gas probes 414 calculate the excessively high gas concentration by measuring the attenuation of light intensity. The gas probes 414 then send the data to the wireless base station installed in the roadway. The wireless base station then transmits the data to the monitoring host via the mine's main communication network. Simultaneously, the nitrogen tank or nitrogen generator starts working, introducing nitrogen into the second distribution pipe 321. The nitrogen is then sent to the first distribution pipe 311 through the two second distribution pipes 321. Combined with the flow rate of the inhibitor and the pressure of the nitrogen inside the second distribution pipe 321, the nitrogen can be rapidly... The nitrogen gas fills the entire leak area, immediately diluting the concentration of methane and oxygen, eliminating the risk of explosion, and buying time for subsequent treatment. The diffusion speed of nitrogen is much faster than that of inhibitor droplets, which can first establish a safe inerting environment. High-pressure nitrogen, as a power source, can shear and break the halide inhibitor solution into extremely fine droplets, increasing the contact surface area between the inhibitor and the coal body, allowing the mixed gas-liquid mixture to be sprayed to a greater distance, effectively covering a large area of ​​the leak or goaf, completing the two processes of "inerting" and "inhibition", improving the efficiency and response speed of disaster prevention and fire fighting, and thus completing all operations.

[0043] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A follow-up safety device integrated into a hydraulic support, comprising a hydraulic support (100) and a front plate (101) rotatably connected to the hydraulic support (100), characterized in that, Also includes: The coordination mechanism (200) includes a carrier plate (201) fixedly connected to the surface of the front plate (101), and a pair of incomplete racks (202) fixedly connected to each other are disposed on the surface of the carrier plate (201). The flow guiding mechanism (300) includes a second carrier plate (301) fixedly connected inside the hydraulic support (100), and a liquid delivery component and an air delivery component are fixedly connected to the surface of the second carrier plate (301); Steering mechanism (400), the steering mechanism (400) includes a carrier (401) fixedly connected inside the hydraulic support (100) in the direction of the center of gravity near the ground surface, and a reciprocating rod (402) is slidably connected inside the carrier (401). The conversion component is located inside the carrier (401) and, in the working state, responds to the rotation of the incomplete rack (202) and generates a corresponding rotation according to its execution distance; Safety components are located at both ends of the reciprocating rod (402).

2. The follow-up safety device integrated into a hydraulic support according to claim 1, characterized in that: The liquid delivery component includes a diversion chamber 1 (310) fixedly connected to the surface of the carrier plate 2 (301). Diversion pipe 1 (311) is fixedly connected to both sides of the inner wall of the diversion chamber 1 (310). Liquid passage holes are opened on the surface of the diversion pipe 1 (311), and a long pipe is threaded inside the liquid passage holes.

3. The follow-up safety device integrated into a hydraulic support according to claim 2, characterized in that: The air supply component includes a flow divider chamber two (320) fixedly connected to the surface of the carrier plate two (301), and a flow divider pipe two (321) is fixedly connected inside the flow divider chamber two (320).

4. The follow-up safety device integrated into a hydraulic support according to claim 3, characterized in that: The ends of the second diversion pipe (321) are fixedly connected to the surfaces of the two first diversion pipes (311), and a one-way valve to prevent fluid backflow is fixedly connected at the end of each second diversion pipe (321) that extends into the first diversion pipe (311).

5. The follow-up safety device integrated into a hydraulic support according to claim 4, characterized in that: The conversion assembly includes a threaded rod (410) rotatably connected inside the carrier (401), with gears (411) fixedly connected to both ends of the threaded rod (410), and a moving block (412) threadedly connected to the surface of the threaded rod (410).

6. A follow-up safety device integrated into a hydraulic support according to claim 5, characterized in that: The moving block (412) is fixedly connected to the reciprocating rod (402), and the surface of the moving block (412) is constrained by the inside of the carrier (401), so that the moving block (412) slides in the cavity inside the carrier (401).

7. A follow-up safety device integrated into a hydraulic support according to claim 6, characterized in that: The safety component includes a fixed rod (4101) fixed at both ends of a reciprocating rod (402), a curved rod (4111) rotatably connected to the surface of the fixed rod (4101), a connecting block (4122) rotatably connected inside the curved rod (4111), a water pipe (413) fixedly connected to the end of the connecting block (4122), an atomizing nozzle fixedly connected inside the water pipe (413), a gas probe (414) fixedly connected to the surface of the connecting block (4122), and an electrically controlled water valve provided in each water pipe (413) near the atomizing nozzle.

8. A follow-up safety device integrated into a hydraulic support according to claim 7, characterized in that: The end of the diversion pipe (311) is fixedly connected to the inside of the water pipe (413), and one side of the connecting block (4122) is rotatably connected to the hydraulic support (100).

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