Fireproof device for coal mining

Abstract

The invention belongs to the technical field of coal mining, and discloses a fire protection device for coal mining, which comprises a main body mechanism consisting of a water tank, an operation platform and a water injection pipe, and further comprises a supporting mechanism connected to the water tank through a connecting mechanism; and the fireproof mechanism is arranged at the top of the supporting mechanism and can move up and down at the top of the supporting mechanism. The driving assembly can drive the fireproof mechanism to move up and down, gas located on the upper portion can be extracted through upward movement of the fireproof mechanism during fire prevention and extinguishment, the gas discharging effect is better, in addition, when the gas is extracted, the extracted gas can be filled into the flexible stretching cloth, and the safety of fire prevention and extinguishment is improved. The mine hole is blocked through expansion of the flexible stretching cloth, so that gas backflow can be prevented, a fire source can be isolated, and the fire source is further limited by reducing combustible gas.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining, in particular to a fire prevention device for coal mining. Background Art

[0002] Fire prevention is the most important step in coal mining operations. Since gas (the main component is methane) is produced during the mining process, if the gas concentration is too high, it is easy to cause an explosion when encountering a fire source, posing a serious threat to coal mine safety production. Therefore, in order to improve coal mine safety production, fire prevention devices are usually installed in coal mines to carry out fire prevention or fire extinguishing.

[0003] The patent with application number CN202323514337.8 discloses a fire prevention device for coal mines, including: a box body for bearing and limiting, a mounting sleeve fixedly connected to the inner side of the upper right end of the box body, and a pump fixedly installed by screws on the box body; it also includes: a moving wheel is fixedly installed by screws on the lower side of the outer end of the box body, and a controller, a buzzer and a gas concentration sensor are embedded and installed on the inner side of the upper end of the box body; a suction and collection structure is arranged on the inner side of the upper end of the box body, and the suction and collection structure includes a mounting sleeve, a suction fan, a hollow plate, a connecting sleeve, a gauze bag, a guide sleeve and an outlet pipe; a suction and water spraying structure is arranged on the upper right side of the box body. The fire prevention device for coal mines is convenient for timely suction, filtration and collection of gas, and is convenient for timely addition of water for spraying and extinguishing fire, so that it has a good fire prevention effect, is convenient for cleaning the dust collected in the gauze bag, is convenient for filtering the added water, avoids clogging and damage to the pump, and is convenient for cleaning the filtered material.

[0004] In the above patent, gas is extracted by suction, and impurities in the gas are filtered during the extraction process, and finally the fire is extinguished by spraying water. However, in this process, since the density of gas is smaller than that of air, the gas is generally in the upper layer of the air in the mine, and in the process of extracting gas, due to the fluidity of the gas, the discharged gas may flow back due to the change of air pressure difference, thereby affecting the fire prevention and extinguishing effect. Therefore, improvements are made to the above problems. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a fire prevention device for coal mining.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: A fire prevention device for coal mining, comprising a main body composed of a water tank, an operating platform and a water injection pipe, and also comprising:

[0007] A supporting mechanism, wherein the supporting mechanism is connected to the water tank via a connecting mechanism;

[0008] A fire prevention mechanism, which is disposed on the top of the support mechanism and can move up and down on the top of the support mechanism;

[0009] A mine cave sealing mechanism, wherein the mine cave sealing mechanism is arranged outside the connecting mechanism and located in the middle area between the water tank and the supporting mechanism, and two mine cave sealing mechanisms are arranged;

[0010] A pumping mechanism, wherein the pumping mechanism is arranged on the surface of the water tank;

[0011] A smoke conveying mechanism, wherein the smoke conveying mechanism is arranged inside the connecting mechanism and one end of the smoke conveying mechanism extends to the top of the water tank;

[0012] Among them, the supporting mechanism includes a supporting box, a driving assembly and a positioning slide rod, the supporting box is fixedly connected to the connecting mechanism, the driving assembly is arranged inside the supporting box, and the output shaft of the driving assembly extends to the outside of the supporting mechanism, the positioning slide rod is fixedly installed at the four corners of the top of the supporting box, the fire protection mechanism is threadedly connected to the output shaft of the driving assembly, the mine sealing mechanism includes a flexible stretch cloth, an unfolding assembly and a telescopic bellows, the flexible stretch cloth is fixedly connected to the outer surface of the connecting mechanism, one end of the unfolding assembly is fixedly connected to the inner wall of the flexible stretch cloth, and the other end is fixedly connected to the connecting mechanism, one end of the telescopic bellows is fixedly connected to the inner wall of the flexible stretch cloth, and the other end is fixedly connected to the connecting mechanism.

[0013] Preferably, the support mechanism also includes a movable plate, which slides inside the support box, and the movable plate is threadedly connected to the output shaft of the drive assembly. The surface of the output shaft of the drive assembly is provided with two sections of threads in the same direction, and the fire protection mechanism moves on the upper threaded surface, and the movable plate moves on the lower threaded surface.

[0014] Preferably, the connecting mechanism includes a first connecting block, a second connecting block, a first baffle and a second baffle, both ends of the first connecting block and the second connecting block are connected to the water tank and the supporting box body, the first baffle connects the first connecting block and the second connecting block, the second baffle is fixedly installed at both ends of the first baffle on the opposite side, and the length of the first baffle is equal to the width of the two flexible stretch cloths.

[0015] Preferably, the fire protection mechanism includes a limiting shell, an extraction assembly and a spraying assembly. The limiting shell is slidably connected to the inner side of the positioning slide rod. The two ends of the limiting shell away from the water tank are respectively provided with an extraction assembly and a spraying assembly. The extraction assembly is connected to the smoke conveying mechanism, and the spraying assembly is connected to the water pumping mechanism.

[0016] Preferably, the pumping mechanism includes a water pump, a pumping pipe and a water supply pipe. The water pump is fixedly installed on the water tank. The pumping pipe and the water supply pipe are respectively arranged at the water inlet and the water outlet of the water pump. The water pump inputs the water inside the water tank into the spray assembly through the pumping pipe and the water supply pipe.

[0017] Preferably, the smoke delivery mechanism includes a first gas pipe, a second gas pipe, a three-way valve and a third gas pipe, one end of the first gas pipe is connected to the extraction component, and the other end is fixed to the second baffle close to the supporting box body, one end of the first gas pipe close to the second baffle is fixedly connected to the three-way valve, the other end of the three-way valve is fixedly connected to the second gas pipe, and the third gas pipe is arranged at the bottom of the three-way valve.

[0018] Preferably, a cavity is provided inside the first connection block, the first connection block is communicated with the support box, and the first connection block is communicated with the telescopic bellows.

[0019] Preferably, three deployment components are arranged inside one of the mine sealing mechanisms, each of the deployment components includes a multi-section electric telescopic rod and a spring telescopic rod, the three multi-section electric telescopic rods are respectively fixed to the top of the first connecting block and the sides of the two first baffles, the spring telescopic rod is fixed to the movable end of the multi-section electric telescopic rod, and the other end of the spring telescopic rod is connected to the inner wall of the flexible expansion cloth.

[0020] Preferably, the outer surfaces of the two flexible stretch cloths are both installed with rubber blocks distributed along their outer contours, and the rubber blocks on the surfaces of the two flexible stretch cloths are correspondingly staggered.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention can drive the fire prevention mechanism to move up and down through the driving component provided. When preventing and extinguishing a fire, the gas located above can be extracted by moving the fire prevention mechanism upward, which has a better effect on the discharge of the gas. Moreover, when extracting the gas, the extracted gas can be filled into the interior of the flexible stretch cloth, and the mine cave can be sealed by the expansion of the flexible stretch cloth, which can prevent the backflow of gas and isolate the fire source, thereby further limiting the fire source by reducing the combustible gas.

[0023] 2. The present invention drives the movable plate upward through the driving component, and can inject the squeezed gas inside the supporting box into the telescopic bellows through the first connecting block. The flexible stretch cloth is quickly unfolded by the extension of the unfolding component. The expansion of the telescopic bellows prevents the corners of the flexible stretch cloth from collapsing when it is unfolded, thereby ensuring that the flexible stretch cloth has a wider range when unfolded.

[0024] 3. The spring telescopic rod provided in the present invention can provide buffering through elastic force after contacting the inner wall of the mine, thereby ensuring that the flexible stretch cloth driven by the spring telescopic rod can better contact the inner wall of the mine during the extension of the multi-section electric telescopic rod. The two rubber blocks on the surface of the flexible stretch cloth can block the generated gap to ensure the sealing effect of the mine, and can also prevent the sharp protrusions on the inner wall of the mine from scratching the flexible stretch cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention (part 1);

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention (part 2);

[0027] Figure 3 It is a schematic diagram of the position of the connecting mechanism of the present invention;

[0028] Figure 4 It is a structural cross-sectional view of the support mechanism of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the mine cave sealing mechanism of the present invention;

[0030] Figure 6 A structural breakdown diagram of the mine cave sealing mechanism of the present invention;

[0031] Figure 7 It is a structural subdivision diagram of the water pumping mechanism and the smoke conveying mechanism of the present invention;

[0032] Figure 8 It is a structural breakdown diagram of the connection mechanism of the present invention;

[0033] Fig. 9 A structural breakdown diagram of the components of the present invention.

[0034] In the figure: 1. Main body; 101. Water tank; 102. Operating platform; 103. Water injection pipe; 2. Support mechanism; 201. Support box; 202. Movable plate; 203. Driving assembly; 204. Positioning slide bar; 3. Connecting mechanism; 301. First connecting block; 302. Second connecting block; 303. First baffle; 304. Second baffle; 4. Fire prevention mechanism; 401. Limiting shell; 402. Extraction assembly; 403. 03. Spraying assembly; 5. Mine sealing mechanism; 501. Flexible stretch cloth; 502. Unfolding assembly; 5021. Multi-section electric telescopic rod; 5022. Spring telescopic rod; 503. Telescopic bellows; 6. Pumping mechanism; 601. Water pump; 602. Pumping pipe; 603. Water pipe; 7. Smoke conveying mechanism; 701. First gas pipe; 702. Second gas pipe; 703. Three-way valve; 704. Third gas pipe. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figures 1 to 9 As shown, the present invention provides a fire prevention device for coal mining, including a main body 1 composed of a water tank 101, an operating platform 102 and a water injection pipe 103, and also includes:

[0037] Support mechanism 2, the support mechanism 2 is connected to the water tank 101 through a connecting mechanism 3;

[0038] The fire prevention mechanism 4 is arranged on the top of the support mechanism 2 and can move up and down on the top of the support mechanism 2;

[0039] The mine cave sealing mechanism 5 is arranged outside the connecting mechanism 3 and located in the middle area between the water tank 101 and the supporting mechanism 2. Two mine cave sealing mechanisms 5 are arranged;

[0040] A pumping mechanism 6, which is disposed on the surface of the water tank 101;

[0041] A smoke conveying mechanism 7, which is disposed inside the connecting mechanism 3 and has one end extending to the top of the water tank 101;

[0042] Among them, the support mechanism 2 includes a support box 201, a drive component 203 and a positioning slide bar 204, the support box 201 is fixedly connected to the connecting mechanism 3, the drive component 203 is arranged inside the support box 201, and the output shaft of the drive component 203 extends to the outside of the support mechanism 2, the positioning slide bar 204 is fixedly installed at the four corners of the top of the support box 201, the fire protection mechanism 4 is threadedly connected to the output shaft of the drive component 203, the mine sealing mechanism 5 includes a flexible stretch cloth 501, an unfolding component 502 and a telescopic bellows 503, the flexible stretch cloth 501 is fixedly connected to the outer surface of the connecting mechanism 3, one end of the unfolding component 502 is fixedly connected to the inner wall of the flexible stretch cloth 501, and the other end is fixedly connected to the connecting mechanism 3, one end of the telescopic bellows 503 is fixedly connected to the inner wall of the flexible stretch cloth 501, and the other end is fixedly connected to the connecting mechanism 3.

[0043] The drive assembly 203 is arranged to drive the fire prevention mechanism 4 to move up and down. During fire prevention and fire extinguishing, the gas located above can be extracted by moving the fire prevention mechanism 4 upward, which has a better effect on the discharge of the gas. Moreover, when extracting the gas, the extracted gas can be filled into the interior of the flexible stretch cloth 501, and the mine cave can be sealed by the expansion of the flexible stretch cloth 501. This can prevent the backflow of gas and can also isolate the fire source, thereby further limiting the fire source by reducing the combustible gas.

[0044] like Figure 4 , 6 As shown in Figures 8 and 9, the support mechanism 2 further includes a movable plate 202, which slides inside the support box 201, and the movable plate 202 is threadedly connected to the output shaft of the driving component 203. The surface of the output shaft of the driving component 203 is provided with two sections of threads in the same direction, and the fire prevention mechanism 4 moves on the upper thread surface, and the movable plate 202 moves on the lower thread surface. The connecting mechanism 3 includes a first connecting block 301, a second connecting block 302, a first baffle 303 and a second baffle 304. The first connecting block 301 Both ends of the second connecting block 302 are connected to the water tank 101 and the supporting box body 201, the first baffle 303 connects the first connecting block 301 and the second connecting block 302, the second baffle 304 is fixedly installed at the two ends of the first baffle 303 on the opposite side, the length of the first baffle 303 is equal to the width of the two flexible stretch cloths 501, a cavity is arranged inside the first connecting block 301, the first connecting block 301 is connected to the supporting box body 201, and the first connecting block 301 is connected to the telescopic bellows 503.

[0045] The driving assembly 203 is configured to synchronously drive the movable plate 202 and the fire prevention mechanism 4 to move. When the fire prevention mechanism 4 moves upward, the gas located on the upper layer can be extracted. When the movable plate 202 moves upward, the gas squeezed inside the supporting box 201 can be injected into the telescopic bellows 503 through the first connecting block 301. The flexible stretching cloth 501 is rapidly expanded by the expansion of the expansion assembly 502. The expansion of the telescopic bellows 503 prevents the corners of the flexible stretching cloth 501 from collapsing when it is expanded. The output shaft of the driving assembly 203 is rotatably connected to the supporting box 201. The two sections on the surface of the output shaft are Threads are arranged at both ends of the connection to ensure the rationality of the structure; the connection mechanism 3 is composed of a first connection block 301, two second connection blocks 302, two first baffles 303 and two second baffles 304, one end of which is a cavity with an opening only at the bottom, and the length of the first baffle 303 is equal to the width of the two flexible stretch cloths 501, that is, the two flexible stretch cloths 501 wrap the cavity area of ​​the connection mechanism 3 with an opening only at the bottom, so the gas inside the smoke conveying mechanism 7 can be released into the flexible stretch cloth 501 through the connection mechanism 3 without leakage.

[0046] It is worth noting that the fire source is one of the key factors that trigger the methane explosion. The explosion limit of methane in the air is 5%-16%. When the concentration of methane in the air is within this range, it is possible to explode when encountering a fire source; if the concentration is lower than 5%, due to the low methane content and relatively excessive air, sufficient energy cannot be released; and when the concentration is higher than 16%, due to the relatively insufficient oxygen content, it is difficult to produce a violent explosion reaction. Therefore, it is feasible to release gas into the flexible stretch cloth 501 as a filler.

[0047] like Figure 2 , 5 As shown in Figures 6 and 7, the fire protection mechanism 4 includes a limiting shell 401, an extraction component 402 and a spraying component 403. The limiting shell 401 is slidably connected to the inner side of the positioning slide rod 204. The extraction component 402 and the spraying component 403 are respectively arranged at both ends of the limiting shell 401 away from the water tank 101. The extraction component 402 is connected to the smoke conveying mechanism 7, and the spraying component 403 is connected to the pumping mechanism 6. The pumping mechanism 6 includes a water pump 601, a pumping pipe 602 and a water delivery pipe 603. The water pump 601 is fixedly installed on the water tank 101. The pumping pipe 602 and the water delivery pipe 603 are respectively arranged at the water inlet and the water outlet of the water pump 601. The water pump 601 inputs the water inside the water tank 101 into the spraying component 403 through the pumping pipe 602 and the water delivery pipe 603.

[0048] The extraction component 402 and the spraying component 403 are both prior art, and reference may be made to the patent application number CN202323514337.8, so no further elaboration is required; the pumping mechanism 6 is provided to transport water to carry out fire extinguishing work.

[0049] like Figure 6 , 7 As shown in Figures 8, the smoke delivery mechanism 7 includes a first gas pipe 701, a second gas pipe 702, a three-way valve 703 and a third gas pipe 704. One end of the first gas pipe 701 is connected to the extraction component 402, and the other end is fixed to the second baffle 304 close to the supporting box 201. One end of the first gas pipe 701 close to the second baffle 304 is fixedly connected to the three-way valve 703, and the other end of the three-way valve 703 is fixedly connected to the second gas pipe 702. The third gas pipe 704 is arranged at the bottom of the three-way valve 703.

[0050] The three-way valve 703 is capable of adjusting whether the first gas pipe 701 is connected with the second gas pipe 702 or the third gas pipe 704. When the first gas pipe 701 is connected with the second gas pipe 702, the gas is directly discharged to the outside in the direction of the fire source. When the first gas pipe 701 is connected with the third gas pipe 704, the gas is injected into the flexible stretch cloth 501 through the third gas pipe 704, thereby expanding the flexible stretch cloth 501. By expanding the flexible stretch cloth 501, the flexible stretch cloth 501 can be made to fit the inner wall of the mine, thereby closing the mine and isolating the internal and external gases, thereby reducing the amount of combustible gas at the fire source.

[0051] like Figure 6 , 9 As shown, three unfolding components 502 are arranged inside a mine sealing mechanism 5, each unfolding component 502 includes a multi-section electric telescopic rod 5021 and a spring telescopic rod 5022, the three multi-section electric telescopic rods 5021 are respectively fixed to the top of the first connecting block 301 and the sides of the two first baffles 303, the spring telescopic rod 5022 is fixed to the movable end of the multi-section electric telescopic rod 5021, and the other end of the spring telescopic rod 5022 is connected to the inner wall of the flexible stretch cloth 501.

[0052] The spring telescopic rod 5022 can provide a buffer through elastic force after contacting the inner wall of the mine, thereby ensuring that the flexible stretch cloth 501 driven by the spring telescopic rod 5022 can better contact the inner wall of the mine during the extension of the multi-section electric telescopic rod 5021.

[0053] like Figure 1 , 2 As shown in FIG. 5 , the outer surfaces of the two flexible stretch cloths 501 are both installed with rubber blocks distributed along their outer contours, and the rubber blocks on the surfaces of the two flexible stretch cloths 501 are correspondingly staggered.

[0054] The rubber blocks arranged on the surfaces of the two flexible stretch cloths 501 are in direct contact with the inner wall of the mine to prevent the sharp protrusions of the inner wall of the mine from scratching the flexible stretch cloth 501, and the rubber blocks on the surfaces of the two flexible stretch cloths 501 are staggered. Since the two flexible stretch cloths 501 are close together, there are gaps between the rubber blocks on the surfaces of the flexible stretch cloths 501 when they expand. In this way, the rubber blocks on the surfaces of the two flexible stretch cloths 501 can block the gaps generated, thereby ensuring the sealing effect of the mine.

[0055] The working principle and use process of the present invention:

[0056] When a fire source is found, the extraction component 402, the spray component 403 and the drive component 203 can be controlled to start through the operating platform 102. The drive component 203 can drive the movable plate 202 and the limiting shell 401 to move upward synchronously. When the movable plate 202 moves upward, it can squeeze the gas above through the first connecting block 301 and enter the telescopic bellows 503, and preliminarily and quickly unfold the flexible stretch cloth 501; when the limiting shell 401 moves upward, it can drive the extraction component 402 and the spray component 403 to move upward, and the gas located above is extracted through the extraction component 402. During the extraction process, the connection between the third gas pipeline 704 and the first gas pipeline 701 is adjusted by the three-way valve 703, and the extracted gas is transported into the flexible stretch cloth 501 as filling, so that the flexible stretch cloth 501 expands to seal the inner wall of the mine; at the same time, the pumping mechanism 6 extracts the water in the water tank 101 and discharges it through the spray component 403 to extinguish the fire source;

[0057] When the interior of the flexible stretch cloth 501 is filled, the first gas pipe 701 is connected to the second gas pipe 702 through the three-way valve 703. At this time, the extracted gas is discharged to the outside through the second gas pipe 702 and will not flow back to the fire source.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire prevention device for coal mining, comprising a main body (1) consisting of a water tank (101), an operating platform (102) and a water injection pipe (103), characterized in that: Also includes, A supporting mechanism (2), wherein the supporting mechanism (2) is connected to the water tank (101) via a connecting mechanism (3); A fire prevention mechanism (4), wherein the fire prevention mechanism (4) is arranged on the top of the support mechanism (2) and can move up and down on the top of the support mechanism (2); A mine cave sealing mechanism (5), the mine cave sealing mechanism (5) being arranged outside the connection mechanism (3) and located in the middle area between the water tank (101) and the support mechanism (2), and two mine cave sealing mechanisms (5) are arranged; A water pumping mechanism (6), wherein the water pumping mechanism (6) is arranged on the surface of the water tank (101); A smoke conveying mechanism (7), wherein the smoke conveying mechanism (7) is arranged inside the connecting mechanism (3) and one end of the smoke conveying mechanism (7) extends to the top of the water tank (101); The support mechanism (2) comprises a support box (201), a drive assembly (203) and a positioning slide bar (204); the support box (201) is fixedly connected to the connection mechanism (3); the drive assembly (203) is arranged inside the support box (201), and the output shaft of the drive assembly (203) extends to the outside of the support mechanism (2); the positioning slide bar (204) is fixedly installed at the four corners of the top of the support box (201); the fire prevention mechanism (4) is connected to the output shaft of the drive assembly (203); Threaded connection, the mine sealing mechanism (5) comprises a flexible stretch cloth (501), an expansion component (502) and a telescopic bellows (503), the flexible stretch cloth (501) is fixedly connected to the outer surface of the connection mechanism (3), one end of the expansion component (502) is fixedly connected to the inner wall of the flexible stretch cloth (501), and the other end is fixedly connected to the connection mechanism (3), one end of the telescopic bellows (503) is fixedly connected to the inner wall of the flexible stretch cloth (501), and the other end is fixedly connected to the connection mechanism (3).

2. The fire prevention device for coal mining according to claim 1, characterized in that: The support mechanism (2) further comprises a movable plate (202), wherein the movable plate (202) slides inside the support box (201), and the movable plate (202) is threadedly connected to the output shaft of the drive assembly (203), and the surface of the output shaft of the drive assembly (203) is provided with two sections of threads in the same direction, and the fire protection mechanism (4) moves on the upper threaded surface, and the movable plate (202) moves on the lower threaded surface.

3. The fire prevention device for coal mining according to claim 2, characterized in that: The connection mechanism (3) comprises a first connection block (301), a second connection block (302), a first baffle (303) and a second baffle (304); both ends of the first connection block (301) and the second connection block (302) are connected to the water tank (101) and the supporting box body (201); the first baffle (303) connects the first connection block (301) and the second connection block (302); the second baffle (304) is fixedly mounted on two ends of the first baffle (303) on opposite sides; the length of the first baffle (303) is equal to the width of the two flexible stretch fabrics (501).

4. The fire prevention device for coal mining according to claim 1, characterized in that: The fire protection mechanism (4) comprises a limiting shell (401), an extraction component (402) and a spraying component (403); the limiting shell (401) is slidably connected to the inner side of the positioning slide rod (204); the limiting shell (401) is provided with an extraction component (402) and a spraying component (403) at two ends of a side away from the water tank (101); the extraction component (402) is connected to the smoke conveying mechanism (7), and the spraying component (403) is connected to the water pumping mechanism (6).

5. The fire prevention device for coal mining according to claim 4, characterized in that: The water pumping mechanism (6) comprises a water pump (601), a water pumping pipe (602) and a water delivery pipe (603); the water pump (601) is fixedly mounted on the water tank (101); the water pumping pipe (602) and the water delivery pipe (603) are respectively arranged at the water inlet and the water outlet of the water pump (601); the water pump (601) inputs the water in the water tank (101) into the spraying assembly (403) through the water pumping pipe (602) and the water delivery pipe (603).

6. The fire prevention device for coal mining according to claim 4, characterized in that: The smoke delivery mechanism (7) comprises a first gas delivery pipe (701), a second gas delivery pipe (702), a three-way valve (703) and a third gas delivery pipe (704); one end of the first gas delivery pipe (701) is connected to the extraction component (402), and the other end is fixed to a second baffle (304) close to the supporting box (201); one end of the first gas delivery pipe (701) close to the second baffle (304) is fixedly connected to the three-way valve (703); the other end of the three-way valve (703) is fixedly connected to the second gas delivery pipe (702); and the third gas delivery pipe (704) is arranged at the bottom of the three-way valve (703).

7. The fire prevention device for coal mining according to claim 3, characterized in that: A cavity is provided inside the first connection block (301); the first connection block (301) is connected to the supporting box body (201); and the first connection block (301) is connected to the telescopic bellows (503).

8. The fire prevention device for coal mining according to claim 1, characterized in that: Three expansion components (502) are arranged inside a mine sealing mechanism (5), each of the expansion components (502) comprises a multi-section electric telescopic rod (5021) and a spring telescopic rod (5022), the three multi-section electric telescopic rods (5021) are respectively fixed to the top of the first connecting block (301) and the sides of the two first baffles (303), the spring telescopic rod (5022) is fixed to the movable end of the multi-section electric telescopic rod (5021), and the other end of the spring telescopic rod (5022) is connected to the inner wall of the flexible expansion cloth (501).

9. The fire prevention device for coal mining according to claim 1, characterized in that: The outer surfaces of the two flexible stretching cloths (501) are both provided with rubber blocks distributed along their outer contours, and the rubber blocks on the surfaces of the two flexible stretching cloths (501) are correspondingly staggered.

Images