Fireproof device for coal mining

Abstract

This invention belongs to the field of coal mining technology and discloses a fire prevention device for coal mining. It includes a main structure consisting of a water tank, an operating platform, and a water injection pipe, and a supporting structure connected to the water tank via a connecting mechanism. A fire prevention mechanism is located on top of the supporting structure and can move up and down on top of the supporting structure. The invention utilizes a driving component to move the fire prevention mechanism up and down. During fire prevention and extinguishing, the upward movement of the fire prevention mechanism extracts methane gas located above, resulting in better methane gas discharge. Furthermore, during methane gas extraction, the extracted gas can be filled into a flexible, expandable fabric, which expands to seal the mine shaft, preventing gas backflow and isolating the fire source. This further restricts the fire source by reducing the amount of combustible gas.

Description

Technical Field

[0001] This invention belongs to the field of coal mining technology, specifically a fire prevention device for coal mining. Background Technology

[0002] Fire prevention is the most important step in coal mining operations. Because gas (mainly methane) is generated during mining, if the gas concentration is too high, it can easily cause an explosion when it comes into contact with a source of ignition, posing a serious threat to the safe production of coal mines. Therefore, in order to improve the safety of coal mines, fire prevention devices are usually installed in coal mines for fire prevention or extinguishing.

[0003] Patent application number CN202323514337.8 discloses a fire prevention device for coal mines, comprising: a housing for load-bearing and limiting functions; an installation sleeve fixedly connected to the inner side of the upper right end of the housing; and a pump fixedly installed on the housing with screws. It also includes: casters fixedly installed on the lower outer side of the housing with screws; and a controller, a buzzer, and a gas concentration sensor embedded in the inner side of the upper end of the housing. A suction and collection structure is provided on the inner side of the upper end of the housing, including an installation sleeve, a fan, a perforated plate, a connecting sleeve, a gauze bag, a guide sleeve, and an outlet pipe. A suction and spray water structure is provided on the upper right side of the housing. This fire prevention device for coal mines facilitates timely suction, filtration, and collection of methane gas, and allows for timely water spraying for fire extinguishing, resulting in good fire prevention performance. It also facilitates cleaning of dust collected in the gauze bag, facilitates water filtration, avoids clogging and damage to the pump, and facilitates cleaning of the filtered material.

[0004] In the aforementioned patent, methane gas is extracted by suction, and impurities in the gas are filtered during the extraction process. Finally, the fire is extinguished by spraying water. However, in this process, because the density of methane gas is less than that of air, methane gas is generally in the upper layer of air in the mine. Furthermore, during the extraction process, due to the fluidity of the gas, the discharged gas may flow back due to changes in air pressure, thereby affecting the fire prevention and extinguishing effect. Therefore, improvements are made to address the above problems. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides a fire prevention device for coal mine operations.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fire prevention device for coal mine operation, comprising a main structure consisting of a water tank, an operating platform, and a water injection pipe, and further comprising...

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

[0008] A fire-resistant mechanism, wherein the fire-resistant mechanism 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 tunnel sealing mechanism is provided, located on the outside of the connecting mechanism and in the middle area between the water tank and the support mechanism; two mine tunnel sealing mechanisms are provided.

[0010] A pumping mechanism is disposed on the surface of the water tank;

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

[0012] The support mechanism includes a support box, a drive assembly, and positioning slide rods. The support box is fixedly connected to the connecting mechanism. The drive assembly is located inside the support box, and its output shaft extends to the outside of the support mechanism. The positioning slide rods are fixedly installed at the four corners of the top of the support box. The fireproof mechanism is threadedly connected to the output shaft of the drive assembly. The mine sealing mechanism includes a flexible stretch fabric, a unfolding assembly, and a telescopic corrugated pipe. The flexible stretch fabric 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 fabric, and the other end is fixedly connected to the connecting mechanism. One end of the telescopic corrugated pipe is fixedly connected to the inner wall of the flexible stretch fabric, and the other end is fixedly connected to the connecting mechanism.

[0013] Preferably, the support mechanism further includes a movable plate that slides inside the support box. The movable plate is threadedly connected to the output shaft of the drive assembly. The output shaft of the drive assembly has two threads in the same direction on its surface, with the fireproof mechanism moving on the upper threaded surface and the movable plate moving 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 support box. 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. The length of the first baffle is equal to the width of two flexible stretch fabrics.

[0015] Preferably, the fire prevention mechanism includes a limiting shell, an extraction component, and a spraying component. The limiting shell is slidably connected to the inner side of the positioning slide rod. The extraction component and the spraying component are respectively provided at both ends of the side of the limiting shell away from the water tank. The extraction component is connected to the flue gas conveying mechanism, and the spraying component is connected to the water pumping mechanism.

[0016] Preferably, the water pumping mechanism includes a water pump, a water pumping pipe, and a water delivery pipe. The water pump is fixedly installed on the water tank, and the water pumping pipe and the water delivery pipe are respectively located at the water inlet and water outlet of the water pump. The water pump pumps water from inside the water tank into the spraying assembly through the water pumping pipe and the water delivery pipe.

[0017] Preferably, the flue gas conveying mechanism includes a first gas delivery pipe, a second gas delivery pipe, a three-way valve, and a third gas delivery pipe. One end of the first gas delivery pipe is connected to the extraction assembly, and the other end is fixed to a second baffle near the support box. The end of the first gas delivery pipe near the second baffle is fixedly connected to the three-way valve, and the other end of the three-way valve is fixedly connected to the second gas delivery pipe. The third gas delivery pipe is located at the bottom of the three-way valve.

[0018] Preferably, the first connecting block has an internal cavity, the first connecting block is connected to the support box, and the first connecting block is connected to the telescopic corrugated pipe.

[0019] Preferably, one of the mine sealing mechanisms is provided with three deployment components. Each deployment component 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 stretch fabric.

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

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The present invention, through the setting of the driving component, can drive the fire prevention mechanism to move up and down. During fire prevention and extinguishing, the upward movement of the fire prevention mechanism can extract the gas located above, resulting in better gas discharge. Furthermore, when extracting gas, the extracted gas can be filled into the interior of the flexible stretch cloth. The expansion of the flexible stretch cloth can seal the mine shaft, thus preventing gas backflow and isolating the fire source. By reducing combustible gas, the fire source is further restricted.

[0023] 2. The present invention drives the movable plate to move upward by driving the drive component, which can inject the compressed gas inside the support box into the telescopic bellows through the first connecting block. The extension of the unfolding component drives the flexible stretching cloth to unfold quickly. The expansion of the telescopic bellows prevents the corners of the flexible stretching cloth from collapsing when it is unfolded, ensuring that the flexible stretching cloth has a wider unfolding range.

[0024] 3. The invention uses a spring telescopic rod that can buffer the contact with the inner wall of the mine through elasticity. This ensures that the flexible extension 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 rubber blocks on the surface of the two flexible extension cloths can block the gaps that are generated, ensuring the sealing effect of the mine and preventing sharp protrusions on the inner wall of the mine from tearing the flexible extension cloth. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention (one of the schematic diagrams);

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

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

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

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

[0030] Figure 6 This is a detailed structural diagram of the mine sealing mechanism of the present invention;

[0031] Figure 7 This is a detailed structural diagram of the pumping mechanism and the flue gas conveying mechanism of the present invention;

[0032] Figure 8 This is a detailed structural diagram of the connecting mechanism of the present invention;

[0033] Figure 9 This is a detailed structural diagram of the unfolded component of the present invention.

[0034] In the diagram: 1. Main structure; 101. Water tank; 102. Operating platform; 103. Water injection pipe; 2. Support mechanism; 201. Support box; 202. Movable plate; 203. Drive assembly; 204. Positioning slide rod; 3. Connecting mechanism; 301. First connecting block; 302. Second connecting block; 303. First baffle; 304. Second baffle; 4. Fireproof mechanism; 401. Limiting shell; 402. Extraction assembly; 4 03. Spraying assembly; 5. Mine sealing mechanism; 501. Flexible stretching fabric; 502. Deployment assembly; 5021. Multi-section electric telescopic rod; 5022. Spring telescopic rod; 503. Telescopic corrugated pipe; 6. Pumping mechanism; 601. Water pump; 602. Pumping pipe; 603. Water delivery pipe; 7. Flue gas conveying mechanism; 701. First gas delivery pipe; 702. Second gas delivery pipe; 703. Three-way valve; 704. Third gas delivery pipe. Detailed Implementation

[0035] 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.

[0036] like Figures 1 to 9 As shown, the present invention provides a fire prevention device for coal mine operation, comprising a main structure 1 consisting of a water tank 101, an operating platform 102, and a water injection pipe 103, and further comprising...

[0037] Support mechanism 2 is connected to water tank 101 via connecting mechanism 3;

[0038] Fireproof mechanism 4 is located on top of support mechanism 2 and can move up and down on top of support mechanism 2.

[0039] The mine shaft sealing mechanism 5 is located outside the connecting mechanism 3 and in the middle area between the water tank 101 and the support mechanism 2. There are two mine shaft sealing mechanisms 5.

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

[0041] Flue gas conveying mechanism 7 is disposed inside the connecting mechanism 3 and one end of it extends to the top of the water tank 101;

[0042] The support mechanism 2 includes a support box 201, a drive assembly 203, and a positioning slide rod 204. The support box 201 is fixedly connected to the connecting mechanism 3. The drive assembly 203 is located 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 rod 204 is fixedly installed at the four corners of the top of the support box 201. The fireproof mechanism 4 is threadedly connected to the output shaft of the drive assembly 203. The mine sealing mechanism 5 includes a flexible stretching cloth 501, an unfolding assembly 502, and a telescopic corrugated pipe 503. The flexible stretching cloth 501 is fixedly connected to the outer surface of the connecting mechanism 3. One end of the unfolding assembly 502 is fixedly connected to the inner wall of the flexible stretching cloth 501, and the other end is fixedly connected to the connecting mechanism 3. One end of the telescopic corrugated pipe 503 is fixedly connected to the inner wall of the flexible stretching cloth 501, and the other end is fixedly connected to the connecting mechanism 3.

[0043] The drive component 203 can drive the fire prevention mechanism 4 to move up and down. During fire prevention and extinguishing, the upward movement of the fire prevention mechanism 4 can extract the gas located above, resulting in better gas exhaust. Furthermore, when extracting gas, the extracted gas can be filled into the interior of the flexible stretch fabric 501. The expansion of the flexible stretch fabric 501 can seal the mine shaft, preventing gas backflow and isolating the fire source. By reducing combustible gas, the fire source can be further restricted.

[0044] like Figure 4 , 6 As shown in Figure 8, the support mechanism 2 also includes a movable plate 202, which slides inside the support housing 201. The movable plate 202 is threadedly connected to the output shaft of the drive assembly 203. The output shaft surface of the drive assembly 203 is provided with two threads in the same direction, and the fireproof mechanism 4 is movable on the upper threaded surface, while the movable plate 202 is movable on the lower threaded 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 support box 201. The first baffle 303 connects the first connecting block 301 and the second connecting block 302. The second baffle 304 is fixedly installed on both 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 fabrics 501. The first connecting block 301 has a cavity inside. The first connecting block 301 is connected to the support box 201 and to the telescopic corrugated pipe 503.

[0045] The drive assembly 203 can synchronously drive the movable plate 202 and the fireproof mechanism 4 to move. When the fireproof mechanism 4 moves upward, it can extract the gas located on the upper layer. When the movable plate 202 moves upward, it can inject the compressed gas inside the support box 201 into the telescopic bellows 503 through the first connecting block 301. The extension of the unfolding assembly 502 drives the flexible unfolding cloth 501 to unfold quickly. The expansion of the telescopic bellows 503 prevents the corners of the flexible unfolding cloth 501 from collapsing when it unfolds. The output shaft of the drive assembly 203 is rotatably connected to the support box 201. The two sections of the output shaft surface Threads are provided at both ends of the connection to ensure the rationality of the structure; the connecting mechanism 3 consists of a first connecting block 301, two second connecting blocks 302, two first baffles 303 and two second baffles 304. One end of the connecting mechanism 3 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 extension cloths 501. That is, the two flexible extension cloths 501 cover the cavity area of ​​the connecting mechanism 3 with an opening only at the bottom. Therefore, the gas inside the flue gas conveying mechanism 7 can be released into the flexible extension cloth 501 through the connecting mechanism 3 without leakage.

[0046] It is worth noting that an ignition source is one of the key factors that triggers a methane explosion. The explosive limit of methane in air is 5%–16%. When the concentration of methane in air is within this range, it may explode upon encountering an ignition source. If the concentration is below 5%, due to insufficient methane content and relatively excessive air, there is not enough energy to be released. When the concentration is above 16%, due to relatively insufficient oxygen content, it is also difficult to produce a violent explosive reaction. Therefore, releasing the methane gas into the interior of the flexible stretched fabric 501 as a filling agent is feasible.

[0047] like Figure 2 , 5 As shown in Figures 6 and 7, the fire prevention mechanism 4 includes a limiting housing 401, an extraction component 402, and a spraying component 403. The limiting housing 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 provided at both ends of the side of the limiting housing 401 away from the water tank 101. The extraction component 402 is connected to the flue gas conveying mechanism 7, and the spraying component 403 is connected to the water pumping mechanism 6. The water pumping mechanism 6 includes a water pump 601, a water pumping pipe 602, and a water delivery pipe 603. The water pump 601 is fixedly installed on the water tank 101. The water pumping pipe 602 and the water delivery pipe 603 are respectively provided at the inlet and 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 water pumping pipe 602 and the water delivery pipe 603.

[0048] The extraction component 402 and the spraying component 403 are both existing technologies, and can be found in the patent application number CN202323514337.8, so they will not be described in detail. The pumping mechanism 6 is used to transport water for fire extinguishing.

[0049] like Figure 6 , 7 As shown in Figures 8 and 9, the flue gas conveying mechanism 7 includes 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 assembly 402, and the other end is fixed to the second baffle 304 near the support box 201. One end of the first gas delivery pipe 701 near 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 delivery pipe 702. The third gas delivery pipe 704 is located at the bottom of the three-way valve 703.

[0050] The three-way valve 703 can adjust whether the first gas supply pipe 701 is connected to the second gas supply pipe 702 or the third gas supply pipe 704. When the first gas supply pipe 701 is connected to the second gas supply pipe 702, the gas is directly discharged to the outside through the direction of the fire source. When the first gas supply pipe 701 is connected to the third gas supply pipe 704, the gas is injected into the interior of the flexible stretching cloth 501 through the third gas supply pipe 704, thereby expanding the flexible stretching cloth 501. Through the expansion of the flexible stretching cloth 501, the flexible stretching cloth 501 can be made to fit the inner wall of the mine, thereby sealing the mine and isolating the internal and external gases, thus reducing the amount of combustible gas at the fire source.

[0051] like Figure 6 , 9 As shown, a mine sealing mechanism 5 has three unfolding components 502 inside. 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. The other end of the spring telescopic rod 5022 is connected to the inner wall of the flexible stretching cloth 501.

[0052] The spring telescopic rod 5022 is designed to buffer the contact with the inner wall of the mine through its elasticity, thereby ensuring that the flexible stretching cloth 501 driven by the spring telescopic rod 5022 makes better contact with 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 Figure 5, rubber blocks are installed on the outer surfaces of the two flexible stretch fabrics 501 along their outer contours, and the rubber blocks on the surfaces of the two flexible stretch fabrics 501 are staggered.

[0054] The rubber blocks on the surfaces of the two flexible stretch fabrics 501 are in direct contact with the inner wall of the mine, preventing sharp protrusions on the inner wall of the mine from tearing the flexible stretch fabrics 501. Furthermore, the rubber blocks on the surfaces of the two flexible stretch fabrics 501 are staggered, and since the two flexible stretch fabrics 501 are close together, there are also gaps between the rubber blocks on their surfaces when the flexible stretch fabrics 501 expand. In this way, the rubber blocks on the surfaces of the two flexible stretch fabrics 501 can block the gaps that are generated, ensuring the sealing effect of the mine.

[0055] Working principle and usage process of this invention:

[0056] When a fire source is detected, the extraction component 402, spraying component 403, and drive component 203 can be activated via 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 into the telescopic corrugated pipe 503, initially and quickly unfolding the flexible stretching cloth 501. When the limiting shell 401 moves upward, it can drive the extraction component 402 and the spraying component 403 to move upward. The extraction component 402 extracts the gas located above. During the extraction process, the connection between the third gas supply pipe 704 and the first gas supply pipe 701 is adjusted by the three-way valve 703. The extracted gas is transported into the interior of the flexible stretching cloth 501 as filling, causing the flexible stretching cloth 501 to expand and seal the inner wall of the mine. At the same time, the water pumping mechanism 6 extracts water from the water tank 101 and discharges it through the spraying component 403 to extinguish the fire source.

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

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

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

Claims

1. A fire prevention device for coal mining, comprising a main structure (1) consisting of a water tank (101), an operating platform (102), and a water injection pipe (103), characterized in that: It also includes, Support mechanism (2), which is connected to water tank (101) via connecting mechanism (3); Fire prevention mechanism (4), the fire prevention mechanism (4) is located on the top of the support mechanism (2) and can move up and down on the top of the support mechanism (2); A mine shaft sealing mechanism (5) is provided on the outside of the connecting mechanism (3) and in the middle area between the water tank (101) and the support mechanism (2). There are two mine shaft sealing mechanisms (5). A pumping mechanism (6) is disposed on the surface of a water tank (101); A flue gas conveying mechanism (7) is disposed inside the connecting mechanism (3) and one end of it extends to the top of the water tank (101); The support mechanism (2) includes a support housing (201), a drive assembly (203), and a positioning slide rod (204). The support housing (201) is fixedly connected to the connecting mechanism (3). The drive assembly (203) is located inside the support housing (201), and the output shaft of the drive assembly (203) extends to the outside of the support mechanism (2). The positioning slide rod (204) is fixedly installed at the four corners of the top of the support housing (201). The fireproof mechanism (4) is connected to the output shaft of the drive assembly (203). The mine sealing mechanism (5) includes a flexible stretching cloth (501), an unfolding component (502), and a telescopic corrugated pipe (503). The flexible stretching 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 stretching cloth (501), and the other end is fixedly connected to the connecting mechanism (3). One end of the telescopic corrugated pipe (503) is fixedly connected to the inner wall of the flexible stretching cloth (501), and the other end is fixedly connected to the connecting mechanism (3). The support mechanism (2) also includes a movable plate (202), which slides inside the support box (201). The movable plate (202) is threadedly connected to the output shaft of the drive assembly (203). The output shaft surface of the drive assembly (203) is provided with two threads in the same direction, and the fireproof mechanism (4) moves on the upper thread surface, while the movable plate (202) moves on the lower thread surface. The fire prevention 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 two ends of the limiting shell (401) away from the water tank (101) are respectively provided with the extraction component (402) and the spraying component (403). The extraction component (402) is connected to the flue gas conveying mechanism (7), and the spraying component (403) is connected to the water pumping mechanism (6). The mine sealing mechanism (5) is provided with three deployment components (502). Each deployment 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). The other end of the spring telescopic rod (5022) is connected to the inner wall of the flexible stretch fabric (501). Both of the flexible stretch fabrics (501) have rubber blocks installed on their outer surfaces, which are distributed along their outer contours, and the rubber blocks on the surfaces of the two flexible stretch fabrics (501) are staggered.

2. The fire prevention device for coal mine operation according to claim 1, characterized in that: The connecting mechanism (3) includes a first connecting block (301), a second connecting block (302), a first baffle (303), and a second baffle (304). Both ends of the first connecting block (301) and the second connecting block (302) are connected to the water tank (101) and the support box (201). The first baffle (303) connects the first connecting block (301) and the second connecting block (302). The second baffle (304) is fixedly installed on both ends of the first baffle (303) on the opposite side. The length of the first baffle (303) is equal to the width of two flexible stretch fabrics (501).

3. The fire prevention device for coal mine operation according to claim 1, characterized in that: 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 located at the inlet and outlet of the water pump (601). The water pump (601) inputs the water inside the water tank (101) into the spraying assembly (403) through the pumping pipe (602) and the water delivery pipe (603).

4. The fire prevention device for coal mine operation according to claim 3, characterized in that: The flue gas conveying mechanism (7) includes 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 assembly (402), and the other end is fixed to the second baffle (304) near the support box (201). One end of the first gas delivery pipe (701) near 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). The third gas delivery pipe (704) is located at the bottom of the three-way valve (703).

5. The fire prevention device for coal mine operation according to claim 2, characterized in that: The first connecting block (301) has a cavity inside, the first connecting block (301) is connected to the support box (201), and the first connecting block (301) is connected to the telescopic corrugated pipe (503).

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