A special anti-deformation regulating device and method for goaf fire prevention and extinguishment

Abstract

The present application relates to a kind of special anti-deformation regulating devices for goaf fire prevention and extinguishment, comprising connecting pipeline, first high-pressure liquid injection hose, second high-pressure liquid injection hose, third high-pressure liquid injection hose, fourth high-pressure liquid injection hose, fifth high-pressure liquid injection hose, tail end high-pressure liquid injection hose;Connecting pipeline includes solid end head pipe and multiple first connecting pipes, first branch pipe, multiple second connecting pipes, second branch pipe, multiple third connecting pipes, third branch pipe, multiple fourth connecting pipes, fourth branch pipe, multiple fifth connecting pipes, transition pipe, virtual end head pipe connected in sequence and continuously and cyclically through flange and rubber pad connection.This application also provides a kind of regulating method for special anti-deformation regulating devices for goaf fire prevention and extinguishment.The present application saves pipe material, nitrogen injection pipeline layout is simple, reduces the labor intensity of workers, even if deformation, the plugging of expansion capsule assembly is not affected by each branch pipe, solid end head pipe and virtual end head pipe, which can ensure effective control of nitrogen injection position in goaf.

Description

Technical Field

[0001] This invention relates to the field of coal mine fire prevention and extinguishing technology, specifically to a deformation-resistant control device and method for fire prevention and extinguishing in goaf areas. Background Technology

[0002] Gas, coal dust, water, fire, and roof collapse are the five major hazards in coal mines. Among them, coal mine fires broadly refer to all types of fires occurring underground, including both external and internal causes. External fires are caused by external ignition sources, such as short circuits, welding, mechanical friction, flames from illegal blasting, and gas and coal dust explosions. Internal fires, also known as spontaneous combustion fires, are caused by the self-oxidation and heat accumulation of coal or other flammable materials, leading to combustion. Internal fires occur more frequently in coal mines, largely due to the relatively concealed nature of their ignition sources and the difficulty for personnel to effectively access them. For example, coal left in the goaf after the coal face has been mined can spontaneously combust under certain conditions, potentially causing gas and coal dust explosions and other underground hazards. Therefore, targeted fire prevention and extinguishing measures are essential.

[0003] Currently, the most common fire prevention and extinguishing technology and equipment for goaf areas involves laying nitrogen injection pipelines into the goaf for nitrogen injection fire prevention and extinguishing measures. Nitrogen injection methods are divided into alternating double-pipeline nitrogen injection and single-pipeline nitrogen injection. Alternating double-pipeline nitrogen injection involves the first pipeline entering the goaf at a certain distance before starting nitrogen injection, while a second nitrogen injection pipeline is laid at a certain distance from the first. Once the second pipeline has entered the goaf at a certain distance, nitrogen injection from the first pipeline is stopped, and nitrogen is injected into the goaf using the second pipeline. This cycle continues until the coal face is completely mined. Single-pipeline nitrogen injection involves laying only one nitrogen injection pipeline within the goaf, with several branches and mechanical switches installed within the pipeline. These switches are controlled to change the nitrogen injection position. Both nitrogen injection methods have certain drawbacks. The former has a low pipeline utilization rate, high pipe material consumption, and a large workload for workers to lay the pipelines. The latter's mechanical switch is easily deformed by the collapse of the roof rock, and the branch pipelines are blocked by gravel or coal, which leads to the failure of the mechanical switch and the uncontrollable nitrogen injection position. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a deformation-resistant control device and method specifically designed for fire prevention and extinguishing in goaf areas.

[0005] The above-mentioned objective of the present invention is achieved through the following technical solution: a special anti-deformation control device for fire prevention and extinguishing in goaf areas, comprising a connecting pipeline, a first high-pressure injection hose, a second high-pressure injection hose, a third high-pressure injection hose, a fourth high-pressure injection hose, a fifth high-pressure injection hose, and a tail end high-pressure injection hose;

[0006] The connecting pipeline includes a solid end pipe and multiple first connecting pipes, first branch pipes, multiple second connecting pipes, second branch pipes, multiple third connecting pipes, third branch pipes, multiple fourth connecting pipes, fourth branch pipes, multiple fifth connecting pipes, transition pipes, and virtual end pipes that are connected sequentially and cyclically through flanges and rubber gaskets, until they are connected to the output pipeline of the nitrogen injection machine; wherein, the first first connecting pipe is connected to the solid end pipe through a flange and a rubber gasket, and the other first connecting pipes are connected to the virtual end pipes through flanges and rubber gaskets;

[0007] The solid end tube, the first branch tube, the second branch tube, the third branch tube, the fourth branch tube, and the virtual end tube are respectively provided with a solid end tube expansion capsule assembly, a first expansion capsule assembly, a second expansion capsule assembly, a third expansion capsule assembly, a fourth expansion capsule assembly, and a virtual end tube expansion capsule assembly; the solid end tube expansion capsule assembly is connected to the internal connecting tube of the solid end tube, the first expansion capsule assembly is connected to the first internal connecting tube, the second expansion capsule assembly is connected to the second internal connecting tube, the third expansion capsule assembly is connected to the third internal connecting tube, the fourth expansion capsule assembly is connected to the fourth internal connecting tube, and the virtual end tube expansion capsule assembly is connected to the internal connecting tube of the virtual end tube;

[0008] The first branch pipe is also equipped with a first zero hose, the second branch pipe is also equipped with a second zero hose and a second branch pipe connecting pipe, the third branch pipe is also equipped with a third zero hose, a third branch pipe first connecting pipe and a third branch pipe second connecting pipe, and the fourth branch pipe is also equipped with a fourth zero hose, a fourth branch pipe first connecting pipe, a fourth branch pipe second connecting pipe and a fourth branch pipe third connecting pipe.

[0009] A first high-pressure injection hose is installed in the first connecting pipe, two second high-pressure injection hoses are installed in the second connecting pipe, three third high-pressure injection hoses are installed in the third connecting pipe, four fourth high-pressure injection hoses are installed in the fourth connecting pipe, and five fifth high-pressure injection hoses are installed in the fifth connecting pipe; five tail-end high-pressure injection hoses are installed on the transition pipe.

[0010] The internal connecting pipe of the solid end tube is connected to one end of the first zero-number hose in the first branch tube through the first high-pressure injection hose in the first connecting pipe. The other end of the first zero-number hose is connected to one end of the second zero-number hose in the second branch tube through a second high-pressure injection hose in the second connecting pipe. The first internal connecting pipe is connected to one end of the second branch tube connecting pipe of the second branch tube through another second high-pressure injection hose in the second connecting pipe. The other end of the second zero-number hose is connected to one end of the third zero-number hose in the third branch tube through a third high-pressure injection hose in the third connecting pipe. The other end of the second branch tube connecting pipe is connected to the third branch tube through another third high-pressure injection hose. One end of the branch pipe No. 1 connecting pipe is connected to one end of the second internal connecting pipe via another third high-pressure injection hose; the other end of the third zero hose is connected to one end of the fourth zero hose of the fourth branch pipe via a fourth high-pressure injection hose inside the fourth connecting pipe; the other end of the third branch pipe No. 1 connecting pipe is connected to one end of the fourth branch pipe No. 1 connecting pipe via another fourth high-pressure injection hose; the other end of the third branch pipe No. 2 connecting pipe is connected to one end of the fourth branch pipe No. 2 connecting pipe via another fourth high-pressure injection hose; and the third internal connecting pipe is connected to one end of the fourth branch pipe No. 3 connecting pipe via another fourth high-pressure injection hose.

[0011] The other ends of the fourth zero hose, the fourth branch pipe first connecting pipe, the fourth branch pipe second connecting pipe, and the fourth branch pipe third connecting pipe are respectively connected to the five tail high-pressure injection hoses on the transition pipe through the five fifth high-pressure injection hoses in the fifth connecting pipe.

[0012] The internal connecting pipe of the virtual end tube is connected to one end of the first zero hose in the first branch tube through the first high-pressure injection hose in the first connecting pipe.

[0013] Furthermore, the solid-end pipe includes a solid-end pipe base and an elbow, which are connected by threads. The solid-end pipe base is L-shaped and includes a horizontal solid-end pipe and a vertical solid-end pipe. One opening of the horizontal solid-end pipe is closed, and a flange is installed at the other opening. A baffle is provided at the flange opening of the horizontal solid-end pipe. A partition plate is provided inside the horizontal solid-end pipe, and the partition plate has multiple nitrogen through holes. The partition plate is connected to the baffle, dividing the interior of the horizontal solid-end pipe into a pipeline channel and a nitrogen channel for nitrogen flow. The solid end tube baffle is provided with a solid end tube internal connecting pipe interface; the solid end tube expansion capsule assembly is disposed above the solid end tube partition plate, the solid end tube expansion capsule assembly includes a solid end tube hollow column and a solid end tube expansion capsule, the solid end tube expansion capsule is installed on the outer periphery of the solid end tube hollow column, the solid end tube hollow column and the solid end tube expansion capsule are placed inside the solid end tube vertical tube, a solid end tube hollow column outlet is provided at the top of the solid end tube hollow column, the bottom end of the solid end tube hollow column is connected to the solid end tube internal connecting pipe, and the solid end tube internal connecting pipe is further connected to the solid end tube internal connecting pipe interface on the solid end tube baffle.

[0014] Furthermore, the virtual end tube includes a virtual end tube base and an elbow, which are connected by threads. The elbow is L-shaped and has a hollow internal structure, including a vertical tube and a horizontal tube. The bottom end of the vertical tube is provided with an internal thread, and an inner filter screen is provided above the internal thread to block gravel and coal. The end of the horizontal tube is a nitrogen injection port, and an outer filter screen is provided inward from the nitrogen injection port of the horizontal tube to block gravel and coal. Multiple perforations are opened parallel to each other along the circumference of the horizontal tube near the nitrogen injection port.

[0015] The virtual end tube base is inverted "T" shape, including a virtual end tube hollow straight tube with openings on both sides and a virtual end tube vertical tube. Flanges and virtual end tube baffles are respectively provided at the openings on both sides of the virtual end tube hollow straight tube. A virtual end tube partition plate is provided inside the virtual end tube hollow straight tube. The virtual end tube partition plate has multiple nitrogen through holes. The two ends of the virtual end tube partition plate are respectively connected to the virtual end tube baffles on both sides of the virtual end tube hollow straight tube, dividing the interior of the virtual end tube hollow straight tube into a virtual end tube pipeline channel and a virtual end tube nitrogen channel for nitrogen flow. A virtual end tube internal connecting pipe interface is provided on the virtual end tube baffle at the opening on the right side.

[0016] The virtual end tube expansion capsule assembly is disposed above the virtual end tube partition plate. The virtual end tube expansion capsule assembly includes a virtual end tube hollow column and a virtual end tube expansion capsule. The virtual end tube expansion capsule is installed on the outer periphery of the virtual end tube hollow column. The virtual end tube hollow column and the virtual end tube expansion capsule are placed inside the virtual end tube vertical tube. A virtual end tube hollow column outlet is provided at the top of the virtual end tube hollow column. The bottom end of the virtual end tube hollow column is connected to the virtual end tube internal connecting pipe. The virtual end tube internal connecting pipe is also connected to the virtual end tube internal connecting pipe interface on the virtual end tube baffle.

[0017] Furthermore, the first, second, third, fourth, and fifth connecting pipes have the same structure, each including a hollow straight pipe and a connecting pipe partition plate. Flanges are provided at both ends of the hollow straight pipe. The connecting pipe partition plate is fixed axially along the hollow straight pipe, and both ends of the connecting pipe partition plate are flush with the two end faces of the hollow straight pipe. The connecting pipe partition plate divides the interior of the hollow straight pipe into a connecting pipe pipeline channel and a connecting pipe nitrogen channel.

[0018] Furthermore, the first branch pipe includes a first base and an elbow, which are connected by threads. The elbow is L-shaped and has a hollow internal structure, including a vertical pipe and a horizontal pipe. The bottom end of the vertical pipe is provided with an internal thread, and an inner filter screen is provided above the internal thread to block gravel and coal. The end of the horizontal pipe is a nitrogen injection port, and an outer filter screen is provided inward from the nitrogen injection port of the horizontal pipe to block gravel and coal. Multiple perforations are opened parallel to each other along the circumference near the nitrogen injection port of the horizontal pipe.

[0019] The first base is inverted "T" shape, including a first hollow straight pipe with openings on both sides and a first vertical pipe. A first front baffle and a first rear baffle are respectively provided at corresponding positions on both sides of the openings of the first hollow straight pipe. Flanges are provided on both sides of the first hollow straight pipe. A first partition plate is provided inside the first hollow straight pipe. The first partition plate has multiple first nitrogen passage holes. The two ends of the first partition plate are respectively connected to the first front baffle and the first rear baffle, dividing the interior of the first hollow straight pipe into a first branch pipe pipeline channel and a first branch pipe nitrogen channel for nitrogen flow. A first internal connecting pipe interface is provided on the first front baffle for connecting to the first internal connecting pipe. A first zero hose interface is provided at corresponding positions on the first front baffle and the first rear baffle for connecting to the first zero hose.

[0020] The first expansion capsule assembly is disposed above the first partition plate. The first expansion capsule assembly includes a first hollow column and a first expansion capsule. The first expansion capsule is installed on the outer periphery of the first hollow column. The first hollow column and the first expansion capsule are placed inside the first vertical tube. A first hollow column outlet is provided at the top of the first hollow column. The bottom end of the first hollow column is connected to a first internal connecting pipe. The first internal connecting pipe is also connected to a first internal connecting pipe interface on the first front baffle.

[0021] Furthermore, the second branch pipe includes a second base and an elbow, which are connected by threads. The elbow is L-shaped and has a hollow internal structure, including a vertical pipe and a horizontal pipe. The bottom end of the vertical pipe is provided with an internal thread, and an inner filter screen is provided above the internal thread to block gravel and coal. The end of the horizontal pipe is a nitrogen injection port, and an outer filter screen is provided inward from the nitrogen injection port of the horizontal pipe to block gravel and coal. Multiple perforations are opened parallel to each other along the circumference of the horizontal pipe near the nitrogen injection port.

[0022] The second base is inverted "T" shape, including a second hollow straight pipe with openings on both sides and a second vertical pipe. A second front baffle and a second rear baffle are respectively located at corresponding positions on both sides of the second hollow straight pipe. Flanges are provided on both sides of the second hollow straight pipe. A second partition plate is provided inside the second hollow straight pipe, and the second partition plate has multiple second nitrogen passage holes. The two ends of the second partition plate are respectively connected to the second front baffle and the second rear baffle, dividing the interior of the second hollow straight pipe into a second branch pipe pipeline channel and a second branch pipe nitrogen channel for nitrogen flow. A second internal connecting pipe interface is provided on the second front baffle for connection to the second internal connecting pipe. A second No. 0 hose interface is provided at corresponding positions on the second front baffle and the second rear baffle for connection to the second No. 0 hose. A second branch pipe connecting pipe interface is provided on one side of the second No. 0 hose interface on the second front baffle and the second rear baffle for connection to the second branch pipe connecting pipe.

[0023] The second expansion capsule assembly is disposed above the second partition plate. The second expansion capsule assembly includes a second hollow column and a second expansion capsule. The second expansion capsule is installed on the outer periphery of the second hollow column. The second hollow column and the second expansion capsule are placed inside the second vertical tube. A second hollow column outlet is provided at the top of the second hollow column. The bottom end of the second hollow column is connected to the second internal connecting pipe. The second internal connecting pipe is also connected to the second internal connecting pipe interface on the second front baffle.

[0024] Furthermore, the third branch pipe includes a third base and an elbow, which are connected by threads. The elbow is L-shaped and has a hollow internal structure, including a vertical pipe and a horizontal pipe. The bottom end of the vertical pipe is provided with an internal thread, and an inner filter screen is provided above the internal thread to block gravel and coal. The end of the horizontal pipe is a nitrogen injection port, and an outer filter screen is provided inward from the nitrogen injection port of the horizontal pipe to block gravel and coal. Multiple perforations are opened parallel to each other along the circumference near the nitrogen injection port of the horizontal pipe.

[0025] The third base is inverted "T" shape, including a third hollow straight pipe with openings on both sides and a third vertical pipe. A third front baffle and a third rear baffle are respectively located at corresponding positions on both sides of the third hollow straight pipe. Flanges are provided on both sides of the third hollow straight pipe. A third partition plate is provided inside the third hollow straight pipe, with multiple nitrogen gas passages on the partition plate. The two ends of the third partition plate are connected to the third front baffle and the third rear baffle, respectively, dividing the interior of the third hollow straight pipe into a third branch pipe pipeline channel and a third branch pipe nitrogen channel for nitrogen flow. The third front baffle plate has... The third internal connecting pipe interface is used to connect to the third internal connecting pipe. The third zero hose interface is provided at the corresponding position of the third front baffle and the third rear baffle for connecting to the third zero hose. The third branch pipe first connecting pipe interface is provided between the third internal connecting pipe interface and the third zero hose interface of the third front baffle and the third rear baffle for connecting to the third branch pipe first connecting pipe. The third branch pipe second connecting pipe interface is provided on the other side of the third internal connecting pipe interface of the third front baffle and the third rear baffle for connecting to the third branch pipe second connecting pipe.

[0026] The third expansion capsule assembly is disposed above the third partition plate. The third expansion capsule assembly includes a third hollow column and a third expansion capsule. The third expansion capsule is installed on the outer periphery of the third hollow column. The third hollow column and the third expansion capsule are placed inside the third vertical tube. A third hollow column outlet is provided at the top of the third hollow column. The bottom end of the third hollow column is connected to the third internal connecting pipe. The third internal connecting pipe is also connected to the third internal connecting pipe interface on the third front baffle.

[0027] Furthermore, the fourth branch pipe includes a fourth base and an elbow, which are connected by threads. The elbow is L-shaped and has a hollow internal structure, including a vertical pipe and a horizontal pipe. The bottom end of the vertical pipe is provided with an internal thread, and an inner filter screen is provided above the internal thread to block gravel and coal. The end of the horizontal pipe is a nitrogen injection port, and an outer filter screen is provided inward from the nitrogen injection port of the horizontal pipe to block gravel and coal. Multiple perforations are opened parallel to each other along the circumference near the nitrogen injection port of the horizontal pipe.

[0028] The fourth base is inverted "T" shape, including a fourth hollow straight pipe with openings on both sides and a fourth vertical pipe. A fourth front baffle and a fourth rear baffle are respectively located at corresponding positions on both sides of the fourth hollow straight pipe. Flanges are provided on both sides of the fourth hollow straight pipe. A fourth partition plate is provided inside the fourth hollow straight pipe, with multiple nitrogen gas passages on the partition plate. The two ends of the fourth partition plate are connected to the fourth front baffle and the fourth rear baffle, respectively, dividing the interior of the fourth hollow straight pipe into a fourth branch pipe pipeline channel and a fourth branch pipe nitrogen channel for nitrogen flow. A fourth internal connecting pipe interface is provided on the fourth front baffle for connection to the fourth internal connecting pipe. The fourth baffle and the fourth rear baffle are provided with a fourth zero hose interface at corresponding positions for connection to the fourth zero hose; the fourth branch pipe first connection interface is provided between the fourth internal connection pipe interface and the fourth zero hose interface on the fourth front baffle and the fourth rear baffle, respectively, for connection to the fourth branch pipe first connection pipe; on the other side of the fourth internal connection pipe interface on the fourth front baffle and the fourth rear baffle, the fourth branch pipe third connection interface and the fourth branch pipe second connection interface are provided in sequence, respectively, the fourth branch pipe second connection interface is used to connect to the fourth branch pipe second connection pipe, and the fourth branch pipe third connection interface is used to connect to the fourth branch pipe third connection pipe.

[0029] The fourth expansion capsule assembly is disposed above the fourth partition plate. The fourth expansion capsule assembly includes a fourth hollow column and a fourth expansion capsule. The fourth expansion capsule is installed on the outer periphery of the fourth hollow column. The fourth hollow column and the fourth expansion capsule are placed inside the fourth vertical tube. A fourth hollow column outlet is provided at the top of the fourth hollow column. The bottom end of the fourth hollow column is connected to the fourth internal connecting pipe. The fourth internal connecting pipe is also connected to the fourth internal connecting pipe interface on the fourth front baffle.

[0030] Furthermore, the transition pipe includes a hollow straight pipe and a transition pipe partition plate. Flanges are provided at both ends of the hollow straight pipe. The transition pipe partition plate is fixed axially on the hollow straight pipe. The two ends of the partition plate are flush with the two end faces of the hollow straight pipe. The partition plate divides the interior of the hollow straight pipe into a pipeline channel and a nitrogen channel. Multiple pipeline holes are also provided on the hollow straight pipe for installing the high-pressure injection hose at the tail end.

[0031] This invention also provides a control method for a deformation-resistant control device specifically designed for fire prevention and extinguishing in goaf areas, which specifically includes the following steps:

[0032] S1, Pipeline transportation, placement and connection;

[0033] Based on the required length of the intake airway of the coal face to be injected with nitrogen, calculate and design the usage of each pipeline in the connecting pipeline, as well as the first high-pressure injection hose, second high-pressure injection hose, third high-pressure injection hose, fourth high-pressure injection hose, fifth high-pressure injection hose, and tail end high-pressure injection hose, and transport them to the intake airway; then arrange each pipeline in the connecting pipeline from the inside to the outside along the intake airway to facilitate subsequent connection.

[0034] Inside the intake airway, a solid end pipe is placed near the coal face. Then, multiple first connecting pipes, first branch pipes, multiple second connecting pipes, second branch pipes, multiple third connecting pipes, third branch pipes, multiple fourth connecting pipes, fourth branch pipes, multiple fifth connecting pipes, transition pipes, and virtual end pipes are placed sequentially and cyclically until the stop line. Inside the intake airway, each pipeline and the high-pressure injection hoses and tail-end high-pressure injection hoses are connected from the inside out. Rubber gaskets are installed between flanges when they are connected with bolts to ensure sealing. The connected pipelines are connected to the output pipeline of the nitrogen injection machine outside the stop line.

[0035] S2. Liquid injection expansion of each expansion capsule assembly and sealing test of connecting pipelines;

[0036] After the connecting pipeline is installed, high-pressure liquid injection is performed on the solid end pipe and all virtual end pipes, the first branch pipe, the second branch pipe, the third branch pipe, the fourth branch pipe, and the virtual end pipe expansion capsule assembly. During liquid injection, liquid is injected by connecting the five tail-end high-pressure injection hoses installed on the transition pipe to external injection pumps. When the injection pressure reaches 5MPa, the injection is stopped. Then, the tail-end high-pressure injection hoses are controlled to maintain the current injection pressure until the solid end pipe expansion capsule assembly, the first branch pipe expansion capsule assembly, the second branch pipe expansion capsule assembly, the third branch pipe expansion capsule assembly, the fourth branch pipe expansion capsule assembly, and the virtual end pipe expansion capsule assembly. The expansion capsule assembly, the second expansion capsule assembly, the third expansion capsule assembly, the fourth expansion capsule assembly, and the virtual end tube expansion capsule assembly are all expanded. Then, nitrogen is injected into the connecting pipeline through a nitrogen injection machine. Since the connecting pipeline is in a closed state, the pressure in the connecting pipeline will gradually increase. The pressure is detected at any position on the connecting pipeline using a pressure gauge. When the pressure gauge shows a gradual increase, it proves that the airtightness of the connecting pipeline meets the usage requirements. If there is a leak, it can be checked and sealed by applying foam to the leaking flange connection until its airtightness meets the usage requirements.

[0037] S3, Nitrogen injection in the goaf and switching of nitrogen injection location;

[0038] Nitrogen injection locations are selected as needed. By controlling the high-pressure injection hose connected to the solid end pipe, virtual end pipe, first branch pipe, second branch pipe, third branch pipe, or fourth branch pipe of the required nitrogen injection location, the pressure of the expansion capsule assembly of the solid end pipe, first expansion capsule assembly, second expansion capsule assembly, third expansion capsule assembly, fourth expansion capsule assembly, or virtual end pipe is depressurized, thereby achieving nitrogen injection at the required location. As the coal mining face continues to advance, the location for nitrogen injection into the goaf is also constantly changing. When switching nitrogen injection locations, it is only necessary to depressurize the expansion capsule assembly at the location requiring nitrogen injection while keeping the other expansion capsule assemblies in an expanded and closed state.

[0039] The beneficial effects of this invention are as follows:

[0040] The present invention provides a special anti-deformation control device for fire prevention and extinguishing in goaf areas. By rationally arranging connecting pipelines and high-pressure injection hoses, and connecting each high-pressure injection hose to an injection pump via a tail-end high-pressure injection hose, the device can individually control the solid end tube expansion capsule assembly, the first expansion capsule assembly, the second expansion capsule assembly, the third expansion capsule assembly, the fourth expansion capsule assembly, and the virtual end tube expansion capsule assembly in the connecting pipelines. Even if the solid end tube, each virtual end tube, the first branch tube, the second branch tube, the third branch tube, and the fourth branch tube are deformed by the pressure of coal and rock in the goaf area, the device can expand and seal them.

[0041] In this invention, the solid end pipe, multiple first connecting pipes, first branch pipes, multiple second connecting pipes, second branch pipes, multiple third connecting pipes, third branch pipes, multiple fourth connecting pipes, fourth branch pipes, multiple fifth connecting pipes, transition pipes, and virtual end pipes are all detachably connected by flanges and rubber gaskets. The rubber gaskets ensure the sealing between the pipes. The first high-pressure injection hose, second high-pressure injection hose, third high-pressure injection hose, fourth high-pressure injection hose, and fifth high-pressure injection hose are all connected to each interface and each tail end high-pressure injection hose by threads. The whole system is detachable, which facilitates construction and installation.

[0042] The present invention provides a special anti-deformation control device for fire prevention and extinguishing in goaf areas, which saves pipe materials, simplifies the layout of nitrogen injection pipelines, and reduces the workload of workers. The nitrogen injection ports at each bend of the connecting pipeline are not easily blocked by gravel or coal. Even if the branch pipes, solid end pipes, and virtual end pipes in the connecting pipeline are deformed, they will not affect the sealing of the expansion capsule assembly, thereby ensuring effective control of the nitrogen injection position in the goaf area. Attached Figure Description

[0043] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate the invention and are used to explain it, but do not constitute an undue limitation of the invention.

[0044] Figure 1 This is a schematic diagram of the structure of the anti-deformation control device for fire prevention and extinguishing in goaf areas according to the present invention.

[0045] Figure 2 This is a schematic diagram of the structure of the solid end tube of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the solid end tube base of the present invention;

[0047] Figure 4 This is a schematic diagram of the elbow structure of the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of the virtual end tube of the present invention;

[0049] Figure 6 This is a schematic diagram of the structure of the first branch pipe of the present invention;

[0050] Figure 7 This is a schematic diagram of the structure of the second branch pipe of the present invention;

[0051] Figure 8 This is a schematic diagram of the structure of the third branch pipe of the present invention;

[0052] Figure 9 This is a schematic diagram of the structure of the fourth branch pipe of the present invention;

[0053] Figure 10 This is a schematic diagram of the connection structure between the actual end tube, the first branch tube, the second branch tube, the third branch tube, and the fourth branch tube of the present invention, via the first high-pressure injection hose, the second high-pressure injection hose, the third high-pressure injection hose, the fourth high-pressure injection hose, the fifth high-pressure injection hose, and the tail end high-pressure injection hose; (the first connecting tube, the second connecting tube, the third connecting tube, the fourth connecting tube, the fifth connecting tube, and the transition tube are not shown).

[0054] Figure 11 This is a schematic diagram of the structure in which the virtual end tube and the first branch tube of the present invention are connected by a first high-pressure injection hose;

[0055] Figure 12 This is a schematic diagram of the structure of the first connecting tube of the present invention;

[0056] Figure 13 This is a schematic diagram of the transition tube of the present invention;

[0057] Figure 14 This is a schematic diagram of the structure of the rubber pad of the present invention;

[0058] Figure 15 This is a schematic diagram of the structure of the first high-pressure injection hose of the present invention;

[0059] Figure 16 This is a schematic diagram of the high-pressure injection hose at the tail end of the present invention;

[0060] Figure 17 This is a schematic diagram of the installation structure of the anti-deformation control device for fire prevention and extinguishing in goaf areas of the present invention in the intake airway and the output pipeline of the nitrogen injection machine;

[0061] The markings in the diagram are as follows: 100, elbow; 1001, vertical pipe; 1002, horizontal pipe; 1003, internal thread; 1004, internal filter screen; 1005, external filter screen; 1006, eyelet; 200, flange; 2001, bolt hole; 300, rubber gasket; 3001, rubber gasket partition plate; 400, nitrogen through hole; 500, first injection hose; 5001, first external threaded connector; 5002, first internal threaded connector.

[0062] 1. Solid end tube; 101. Solid end tube base; 1011. Solid end tube horizontal tube; 1012. Solid end tube vertical tube; 102. Solid end tube baffle; 103. Solid end tube partition plate; 104. Solid end tube pipeline channel; 105. Solid end tube nitrogen channel; 106. Solid end tube internal connecting pipe interface; 107. Solid end tube expansion capsule assembly; 1071. Solid end tube hollow column; 10711. Solid end tube hollow column liquid outlet; 1072. Solid end tube expansion capsule; 108. Solid end tube internal connecting pipe; 2 201. Virtual end tube; 2012. Virtual end tube base; 2013. Virtual end tube hollow straight tube; 2014. Virtual end tube vertical tube; 205. Virtual end tube baffle; 206. Virtual end tube partition plate; 207. Virtual end tube pipeline channel; 208. Virtual end tube nitrogen channel; 209. Virtual end tube internal connecting pipe interface; 2000. Virtual end tube expansion capsule assembly; 2001. Virtual end tube hollow column; 20011. Virtual end tube hollow column liquid outlet; 2002. Virtual end tube expansion capsule; 2013. Virtual end tube internal connecting pipe;

[0063] 31. First connecting pipe; 3100. First high-pressure injection hose; 32. Second connecting pipe; 3200. Second high-pressure injection hose; 33. Third connecting pipe; 3300. Third high-pressure injection hose; 34. Fourth connecting pipe; 3400. Fourth high-pressure injection hose; 35. Fifth connecting pipe; 3500. Fifth high-pressure injection hose; 301. Hollow straight connecting pipe; 302. Connecting pipe partition plate; 303. Connecting pipe pipeline channel; 304. Connecting pipe nitrogen channel;

[0064] 4. First branch pipe; 401. First base; 4011. First hollow straight pipe; 4012. First vertical pipe; 4021. First front baffle; 4022. First rear baffle; 403. First partition plate; 404. First branch pipe pipeline channel; 405. First branch pipe nitrogen channel; 406. First internal connecting pipe interface; 407. First No. 0 hose interface; 408. First expansion capsule assembly; 4081. First hollow column; 40811. First hollow column liquid outlet; 4082. First expansion capsule; 409. First internal connecting pipe; 4010. First No. 0 hose;

[0065] 5. Second branch pipe; 501. Second base; 50101. Second hollow straight pipe; 50102. Second vertical pipe; 5021. Second front baffle; 5022. Second rear baffle; 503. Second partition plate; 504. Second branch pipe pipeline channel; 505. Second branch pipe nitrogen channel; 506. Second internal connecting pipe interface; 507. Second No. 0 hose interface; 508. Second branch pipe connecting pipe interface; 509. Second expansion capsule assembly; 5091. Second hollow column; 50911. Second hollow column liquid outlet; 5092. Second expansion capsule; 5010. Second internal connecting pipe; 5011. Second No. 0 hose; 5012. Second branch pipe connecting pipe;

[0066] 6. Third branch pipe; 601. Third base; 60101. Third hollow straight pipe; 60102. Third vertical pipe; 6021. Third front baffle; 6022. Third rear baffle; 603. Third partition plate; 604. Third branch pipe pipeline channel; 605. Third branch pipe nitrogen channel; 606. Third internal connecting pipe interface; 607. Third No. 0 hose interface; 608. Third branch pipe No. 1 connecting pipe interface; 609. Third branch pipe No. 2 connecting pipe interface; 6010. Third expansion capsule assembly; 6010-1. Third hollow column; 6010-11. Third hollow column liquid outlet; 6010-2. Third expansion capsule; 6011. Third internal connecting pipe; 6012. Third No. 0 hose; 6013. Third branch pipe No. 1 connecting pipe; 6014. Third branch pipe No. 2 connecting pipe;

[0067] 7. Fourth branch pipe; 701. Fourth base; 70101. Fourth hollow straight pipe; 70102. Fourth vertical pipe; 7021. Fourth front baffle; 7022. Fourth rear baffle; 703. Fourth partition plate; 704. Fourth branch pipe pipeline channel; 705. Fourth branch pipe nitrogen channel; 706. Fourth internal connecting pipe interface; 707. Fourth zero hose interface; 708. Fourth branch pipe first connecting pipe interface; 709. Fourth branch pipe second... Connecting pipe interface; 7010; Fourth branch pipe No. 3 connecting pipe interface; 7011, Fourth expansion capsule assembly; 7011-1, Fourth hollow column; 7011-11, Fourth hollow column outlet; 7011-2, Fourth expansion capsule; 7012, Fourth internal connecting pipe; 7013, Fourth No. 0 hose; 7014, Fourth branch pipe No. 1 connecting pipe; 7015, Fourth branch pipe No. 2 connecting pipe; 7016, Fourth branch pipe No. 3 connecting pipe;

[0068] 8. Transition pipe; 801. Hollow straight tube of transition pipe; 802. Divider plate of transition pipe; 803. Pipeline channel of transition pipe; 804. Nitrogen channel of transition pipe; 805. Cable hole of transition pipe;

[0069] 9. Tail-end high-pressure injection hose; 901. Second injection hose; 902. Second external threaded connector; 903. Second internal threaded connector; 904. Ball valve; 905. Wrench;

[0070] 10. Coal mining face; 11. Intake airway; 12. Stop line; 13. Output pipeline; 14. Goaf. Detailed Implementation

[0071] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the detailed content and specific implementation of the present invention.

[0072] Example 1

[0073] Reference Figures 1-17 A special anti-deformation control device for fire prevention and extinguishing in goaf areas includes connecting pipelines, a first high-pressure injection hose 3100, a second high-pressure injection hose 3200, a third high-pressure injection hose 3300, a fourth high-pressure injection hose 3400, a fifth high-pressure injection hose 3500, and a tail-end high-pressure injection hose 9.

[0074] The connecting pipeline includes a solid end pipe 1 and multiple first connecting pipes 31, first branch pipes 4, multiple second connecting pipes 32, second branch pipes 5, multiple third connecting pipes 33, third branch pipes 6, multiple fourth connecting pipes 34, fourth branch pipes 7, multiple fifth connecting pipes 35, transition pipes 8, and virtual end pipes 2, which are connected sequentially and cyclically through flanges 200 and rubber gaskets 300, until they are connected to the output pipeline 13 of the nitrogen injection machine; wherein, the first first connecting pipe 31 is connected to the solid end pipe 1 through flanges 200 and rubber gaskets 300, and the other first connecting pipes 31 are connected to the virtual end pipes 2 through flanges 200 and rubber gaskets 300;

[0075] Inside the solid end tube 1, the first branch tube 4, the second branch tube 5, the third branch tube 6, the fourth branch tube 7, and the virtual end tube 2, there are respectively a solid end tube expansion capsule assembly 107, a first expansion capsule assembly 408, a second expansion capsule assembly 509, a third expansion capsule assembly 6010, a fourth expansion capsule assembly 7011, and a virtual end tube expansion capsule assembly 207. The solid end tube expansion capsule assembly 107 is connected to the internal connecting tube 108 of the solid end tube; the first expansion capsule assembly 408 is connected to the first internal connecting tube 409; the second expansion capsule assembly 509 is connected to the second internal connecting tube 5010; and the third expansion capsule assembly 6010 is connected to the third internal connecting tube 6011. The fourth expansion capsule assembly 7011 is connected to the fourth internal connecting pipe 7012, and the virtual end tube expansion capsule assembly 207 is connected to the virtual end tube internal connecting pipe 208; the first branch tube 4 is also provided with a first zero hose 4010, the second branch tube 5 is also provided with a second zero hose 5011 and a second branch tube connecting pipe 5012, the third branch tube 6 is also provided with a third zero hose 6012, a third branch tube first connecting pipe 6013 and a third branch tube second connecting pipe 6014, and the fourth branch tube 7 is also provided with a fourth zero hose 7013, a fourth branch tube first connecting pipe 7014, a fourth branch tube second connecting pipe 7015 and a fourth branch tube third connecting pipe 7016;

[0076] A first high-pressure injection hose 3100 is provided in the first connecting pipe 31, two second high-pressure injection hoses 3200 are provided in the second connecting pipe 32, three third high-pressure injection hoses 3300 are provided in the third connecting pipe 33, four fourth high-pressure injection hoses 3400 are provided in the fourth connecting pipe 34, and five fifth high-pressure injection hoses 3500 are provided in the fifth connecting pipe 35.

[0077] Five high-pressure injection hoses 9 at their tail ends are installed on the transition pipe 8;

[0078] Reference Figure 10The internal connecting pipe 108 of the solid end tube is connected to one end of the first zero-number hose 4010 in the first branch pipe 4 via the first high-pressure injection hose 3100 in the first connecting pipe 31. The other end of the first zero-number hose 4010 is connected to one end of the second zero-number hose 5011 in the second branch pipe 5 via a second high-pressure injection hose 3200 in the second connecting pipe 32. The first internal connecting pipe 409 is connected to one end of the second branch pipe connecting pipe 5012 in the second branch pipe 5 via another second high-pressure injection hose 3200 in the second connecting pipe 32. The other end of the second zero-number hose 5011 is connected to one end of the third zero-number hose 6012 in the third branch pipe 6 via a third high-pressure injection hose 3300 in the third connecting pipe 33. The other end of the second branch pipe connecting pipe 5012 is connected to the third branch pipe 6 via another third high-pressure injection hose 3300. One end of the branch pipe No. 1 connecting pipe 6013 is connected to one end of the third branch pipe No. 2 connecting pipe 6014 via another third high-pressure injection hose 3300; the other end of the third zero hose 6012 is connected to one end of the fourth zero hose 7013 of the fourth branch pipe 7 via a fourth high-pressure injection hose 3400 inside the fourth connecting pipe 34; the other end of the third branch pipe No. 1 connecting pipe 6013 is connected to one end of the fourth branch pipe No. 1 connecting pipe 7014 via another fourth high-pressure injection hose 3400; the other end of the third branch pipe No. 2 connecting pipe 6014 is connected to one end of the fourth branch pipe No. 2 connecting pipe 7015 via another fourth high-pressure injection hose 3400; and the third internal connecting pipe 6011 is connected to one end of the fourth branch pipe No. 3 connecting pipe 7016 via another fourth high-pressure injection hose 3400.

[0079] The other ends of the fourth zero hose 7013, the fourth branch pipe first connecting pipe 7014, the fourth branch pipe second connecting pipe 7015, and the fourth branch pipe third connecting pipe 7016 are respectively connected to the five tail-end high-pressure injection hoses 3500 in the fifth connecting pipe 35 and the five tail-end high-pressure injection hoses 9 on the transition pipe 8; refer to Figure 11 The internal connecting pipe 208 of the virtual end pipe is connected to one end of the first zero hose 4010 in the first branch pipe 4 through the first high-pressure injection hose 3100 in the first connecting pipe 31.

[0080] Reference Figure 15In this invention, the diameter of the first injection hose 500 of the first high-pressure injection hose 3100, the second high-pressure injection hose 3200, the third high-pressure injection hose 3300, the fourth high-pressure injection hose 3400, and the fifth high-pressure injection hose 3500 is 0.6cm-1.0cm, and the length of a single hose is 20m-50m. One end of the first injection hose 500 is provided with a first external thread connector 5001, and the other end is provided with a first internal thread connector 5002. The first internal thread connector 5002 is a snap-lock connector, which can rotate on its own without causing the first injection hose 500 to rotate together, thereby facilitating connection.

[0081] Reference Figure 16 The high-pressure injection hose 9 at the tail end includes a second injection hose 901. One end of the second injection hose 901 has a second external threaded connector 902, which connects to the first internal threaded connector 5002 of the first injection hose 500. The other end has a second internal threaded connector 903. A ball valve 904 is also located at the end with the second internal threaded connector 903. The ball valve 904 has a cubic structure, and a wrench 905 is located on its exterior. The internal threaded connector 903 connects to the external pipeline of the injection pump, thus connecting the high-pressure injection hose 9 at the tail end to the injection pump. The opening of the ball valve 904 is adjusted by rotating the wrench 905, thereby regulating the liquid flow rate within the second injection hose 901. The diameter of the second injection hose 901 is 0.6cm-1.0cm, and its single-piece length is 20m-50m.

[0082] Reference Figures 2-4The solid-end pipe 1 includes a solid-end pipe base 101 and an elbow 100, which are connected by threads. The elbow 100 is L-shaped and has a hollow internal structure, including a vertical pipe 1001 and a horizontal pipe 1002. The bottom end of the vertical pipe 1001 is provided with an internal thread 1003, and an internal filter screen 1004 is provided 5cm-10cm above the internal thread 1003 to block gravel and coal. The end of the horizontal pipe 1002 is a nitrogen injection port. An external filter screen 1005 is installed 2-5 cm inward from the nitrogen injection port of the horizontal pipe 1002 to block gravel and coal fragments. Multiple perforations 1006 are parallel to each other along the circumference of the horizontal pipe 1002 near the nitrogen injection port to increase the ventilation area of ​​the entire bend 100 and reduce the probability of complete blockage by gravel and coal fragments. The solid end pipe base 101 is L-shaped and includes a solid end pipe horizontal pipe 10. 11 and solid end pipe vertical pipe 1012, solid end pipe horizontal pipe 1011 have a closed opening on one side and a flange 200 installed at the opening on the other side. A solid end pipe baffle 102 is provided at the opening of the flange 200 in the solid end pipe horizontal pipe 1011. A solid end pipe partition plate 103 is provided inside the solid end pipe horizontal pipe 1011. The solid end pipe partition plate 103 is provided with multiple nitrogen gas passages 400 (in this embodiment, four nitrogen gas passages 400 are provided). Nitrogen through holes 400 are evenly distributed on both sides of the hollow column 1071 of the solid end tube, and the diameter of the holes is 1 / 3 to 1 / 2 of the diameter of the hollow column 1071 of the solid end tube. The solid end tube partition plate 103 is connected to the solid end tube baffle 102, which divides the interior of the solid end tube horizontal tube 1011 into the solid end tube pipeline channel 104 and the solid end tube nitrogen channel 105 for nitrogen flow. The solid end tube baffle 102 is provided with a solid end tube internal connecting pipe interface 106.

[0083] The solid end tube expansion capsule assembly 107 is disposed above the solid end tube partition plate 103. The solid end tube expansion capsule assembly 107 includes a solid end tube hollow column 1071 and a solid end tube expansion capsule 1072. The solid end tube expansion capsule 1072 is installed on the outer periphery of the solid end tube hollow column 1071. The solid end tube hollow column 1071 and the solid end tube expansion capsule 1072 are placed inside the solid end tube vertical tube 1012. A solid end tube hollow column outlet 10711 is provided at the top of the solid end tube hollow column 1071. The bottom end of the solid end tube hollow column 1071 is connected to the solid end tube internal connecting pipe 108. The solid end tube internal connecting pipe 108 is also connected to the solid end tube internal connecting pipe interface 106 on the solid end tube baffle 102.

[0084] In this invention, the diameter of the solid end tube horizontal pipe 1011 is 8cm-12cm, the diameter of the solid end tube vertical pipe 1012 is not less than 1 / 2 of the diameter of the solid end tube horizontal pipe 1011, and the area of ​​the solid end tube baffle 102 is 1 / 3 of the cross-sectional area of ​​the solid end tube horizontal pipe 1011. That is, the cross-sectional area of ​​the solid end tube nitrogen channel 105 is 2 / 3 of the cross-sectional area of ​​the solid end tube horizontal pipe 1011. The dimensions of the other first connecting pipe 31, first branch pipe 4, second branch pipe 5, third branch pipe 6, fourth branch pipe 7, and virtual end tube 2 are the same as the above dimensions of the solid end tube horizontal pipe 1011, and will not be repeated here.

[0085] The diameters of the hollow straight pipe 301 in the connecting pipe and the hollow straight pipe 801 in the transition pipe are the same as the diameter of the horizontal pipe 1011 at the solid end, which is 8cm-12cm. The single length of the hollow straight pipe 301 in the connecting pipe and the hollow straight pipe 801 in the transition pipe is 2m-4m.

[0086] In this invention, the solid end tube expansion capsule 1072, the virtual end tube expansion capsule 2072, the first expansion capsule 4082, the second expansion capsule 5092, the third expansion capsule 6010-2, and the fourth expansion capsule 7011-2 have a maximum pressure resistance of 10MPa and have flame-retardant and wear-resistant properties.

[0087] Reference Figure 5The virtual end pipe 2 includes a virtual end pipe base 201 and an elbow 100, which are connected by threads. The elbow 100 is L-shaped and hollow inside, including a vertical pipe 1001 and a horizontal pipe 1002. The bottom end of the vertical pipe 1001 is provided with an internal thread 1003, and an inner filter screen 1004 is provided 5cm-10cm above the internal thread 1003 to block gravel and coal. The end of the horizontal pipe 1002 is a nitrogen injection port, and an outer filter screen 1005 is provided 2cm-5cm inward from the nitrogen injection port of the horizontal pipe 1002 to block gravel and coal. Multiple perforations 1006 are opened parallel to each other along the circumference of the horizontal pipe 1002 near the nitrogen injection port to increase the ventilation area of ​​the entire elbow 100 and reduce the probability of being completely blocked by gravel and coal. The virtual end pipe base 201 Shaped like an inverted "T", it includes a hollow straight pipe 2011 with openings on both sides and a vertical pipe 2012 with virtual ends. A flange 200 and a virtual end baffle 202 are respectively provided at the openings on both sides of the hollow straight pipe 2011. A virtual end partition plate 203 is provided inside the hollow straight pipe 2011, and the virtual end partition plate 203 has multiple nitrogen through holes 400 (in this embodiment, four nitrogen through holes 400 are provided). 00, the specific dimensions and installation position are the same as the solid end tube 1) The two ends of the virtual end tube partition plate 203 are respectively connected to the virtual end tube baffles 202 on both sides of the virtual end tube hollow straight tube 2011, dividing the interior of the virtual end tube hollow straight tube 2011 into a virtual end tube pipeline channel 204 and a virtual end tube nitrogen channel 205 for nitrogen flow. The virtual end tube internal connection pipe interface 206 is provided on the virtual end tube baffle 202 at the opening on the right side.

[0088] The virtual end tube expansion capsule assembly 207 is disposed above the virtual end tube partition plate 203. The virtual end tube expansion capsule assembly 207 includes a virtual end tube hollow column 2071 and a virtual end tube expansion capsule 2072. The virtual end tube expansion capsule 2072 is installed on the outer periphery of the virtual end tube hollow column 2071. The virtual end tube hollow column 2071 and the virtual end tube expansion capsule 2072 are placed inside the virtual end tube vertical tube 2012. The bottom end of the virtual end tube hollow column 2071 is connected to the virtual end tube internal connecting pipe 208. The virtual end tube internal connecting pipe 208 is also connected to the virtual end tube internal connecting pipe interface 206 on the virtual end tube baffle 202.

[0089] Reference Figure 12The first connecting pipe 31, the second connecting pipe 32, the third connecting pipe 33, the fourth connecting pipe 34, and the fifth connecting pipe 35 have the same structure, each including a hollow straight pipe 301 and a connecting pipe partition plate 302. Flanges 200 are respectively provided at both ends of the hollow straight pipe 301. The connecting pipe partition plate 302 is fixed axially to the hollow straight pipe 301. The two ends of the connecting pipe partition plate 302 are flush with the two end faces of the hollow straight pipe 301. The connecting pipe partition plate 302 divides the interior of the hollow straight pipe 301 into a connecting pipe pipeline channel 303 and a connecting pipe nitrogen channel 304.

[0090] Reference Figure 6The first branch pipe 4 includes a first base 401 and an elbow 100, which are connected by threads. The elbow 100 is L-shaped and has a hollow internal structure, including a vertical pipe 1001 and a horizontal pipe 1002. The bottom end of the vertical pipe 1001 is provided with an internal thread 1003, and an inner filter screen 1004 is provided 5cm-10cm above the internal thread 1003 to block gravel and coal. The end of the horizontal pipe 1002 is a nitrogen injection port, and an outer filter screen 1005 is provided 2cm-5cm inward from the nitrogen injection port of the horizontal pipe 1002 to block gravel and coal. Multiple perforations 1006 are parallel to each other along the circumference near the nitrogen injection port to increase the ventilation area of ​​the entire bend 100 and reduce the probability of it being completely blocked by gravel and coal. The first base 401 is inverted "T" shape, including a first hollow straight pipe 4011 with openings on both sides and a first vertical pipe 4012. A first front baffle 4021 and a first rear baffle 4022 are respectively provided at corresponding positions on both sides of the openings of the first hollow straight pipe 4011. Flanges 200 are provided on both sides of the first hollow straight pipe 4011. A first partition plate 403 is provided inside the first hollow straight pipe 4011. Multiple nitrogen through holes 400 are provided on the first partition plate 403. This embodiment provides four nitrogen passages 400, with specific dimensions and installation positions identical to those of the solid end tube 1). The two ends of the first partition plate 403 are connected to the first front baffle 4021 and the first rear baffle 4022, respectively, dividing the interior of the first hollow straight tube 4011 into a first branch pipe channel 404 and a first branch pipe nitrogen channel 405 for nitrogen flow. A first internal connecting pipe interface 406 is provided on the first front baffle 4021 for connection to the first internal connecting pipe 409. First zero-wire hose interfaces 407 are provided at corresponding positions on the first front baffle 4021 and the first rear baffle 4022 for connection to the first zero-wire hose 4010. An expansion capsule assembly 408 is disposed above a first partition plate 403. The first expansion capsule assembly 408 includes a first hollow column 4081 and a first expansion capsule 4082. The first expansion capsule 4082 is installed on the outer periphery of the first hollow column 4081. The first hollow column 4081 and the first expansion capsule 4082 are placed inside a first vertical tube 4012. A first hollow column outlet 40811 is provided at the top of the first hollow column 4081. The bottom end of the first hollow column 4081 is connected to a first internal connecting pipe 409. The first internal connecting pipe 409 is also connected to a first internal connecting pipe interface 406 on a first front baffle 4021.

[0091] Reference Figure 7The second branch pipe 5 includes a second base 501 and an elbow 100, which are connected by threads. The elbow 100 is L-shaped and has a hollow internal structure, including a vertical pipe 1001 and a horizontal pipe 1002. The bottom end of the vertical pipe 1001 is provided with an internal thread 1003, and an internal filter screen 1004 is provided 5cm-10cm above the internal thread 1003 to block gravel and coal. The end of the horizontal pipe 1002 is a nitrogen injection port. An external filter 1005 is installed 2-5 cm inward from the nitrogen injection port of the second bend to block gravel and coal. Multiple perforations 1006 are parallel to each other along the circumference near the nitrogen injection port on the horizontal pipe 1002 to increase the ventilation area of ​​the entire bend 100 and reduce the probability of complete blockage by gravel and coal. The second base 501 is inverted "T" shape, including a second hollow straight pipe 50101 with openings on both sides and a second vertical pipe 50102. Corresponding positions on the openings of the second hollow straight pipe 50101 are respectively provided with... Two front baffles 5021 and a second rear baffle 5022 are provided, and flanges 200 are respectively provided on both sides of the second hollow straight pipe 50101. A second partition plate 503 is provided inside the second hollow straight pipe 50101. The second partition plate 503 has multiple second nitrogen through holes 400. The two ends of the second partition plate 503 are respectively connected to the second front baffle 5021 and the second rear baffle 5022, dividing the interior of the second hollow straight pipe 50101 into a second branch pipe pipeline channel 504 and a second branch pipe nitrogen for nitrogen flow. Channel 505 has a second internal connecting pipe interface 506 on the second front baffle 5021 for connecting to the second internal connecting pipe 5010. A second zero hose interface 507 is provided at the corresponding position of the second front baffle 5021 and the second rear baffle 5022 for connecting to the second zero hose 5011. A second branch pipe connecting pipe interface is provided on one side of the second zero hose interface 507 on the second front baffle 5021 and the second rear baffle 5022 for connecting to the second branch pipe connecting pipe 5012.

[0092] The second expansion capsule assembly 509 is disposed above the second partition plate 503. The second expansion capsule assembly 509 includes a second hollow column 5091 and a second expansion capsule 5092. The second expansion capsule 5092 is installed on the outer periphery of the second hollow column 5091. The second hollow column 5091 and the second expansion capsule 5092 are placed inside the second vertical tube 50102. A second hollow column outlet 50911 is provided at the top of the second hollow column 5091. The bottom end of the second hollow column 5091 is connected to the second internal connecting pipe 5010. The second internal connecting pipe 5010 is also connected to the second internal connecting pipe interface 506 on the second front baffle 5021.

[0093] Reference Figure 8The third branch pipe 6 includes a third base 601 and an elbow 100, which are connected by threads. The elbow 100 is L-shaped and has a hollow internal structure, including a vertical pipe 1001 and a horizontal pipe 1002. The bottom end of the vertical pipe 1001 is provided with an internal thread 1003, and an inner filter screen 1004 is provided 5cm-10cm above the internal thread 1003 to block gravel and coal. The end of the horizontal pipe 1002 is a nitrogen injection port, and an outer filter screen 1005 is provided 2cm-5cm inward from the nitrogen injection port of the horizontal pipe 1002 to block... Crushed stone and crushed coal; multiple perforations 1006 are opened parallel to each other along the circumference near the nitrogen injection port of the horizontal pipe 1002 to increase the ventilation area of ​​the entire bend 100 and reduce the probability of being completely blocked by crushed stone and crushed coal; the third base 601 is inverted "T" shape, including a third hollow straight pipe 60101 with openings on both sides and a third vertical pipe. The third hollow straight pipe 60101 has a third front baffle 6021 and a third rear baffle 6022 at corresponding positions on both sides of the openings on both sides, and flanges 200 are provided on both sides of the third hollow straight pipe 60101. A third The third partition plate 603 has multiple nitrogen through holes 400 (in this embodiment, four nitrogen through holes 400 are provided, with specific dimensions and installation positions the same as the actual end pipe 1). The two ends of the third partition plate 603 are connected to the third front baffle 6021 and the third rear baffle 6022 respectively, dividing the interior of the third hollow straight pipe 60101 into a third branch pipe pipeline channel 604 and a third branch pipe nitrogen channel 605 for nitrogen flow. The third front baffle 6021 has a third internal connecting pipe interface 606 for connecting to the third internal connecting pipe 6011. The third front baffle 6021 and the third rear baffle... A third zero hose interface 607 is provided at the corresponding position of 6022 for connection with the third zero hose 6012; a third branch pipe first connection interface 608 is provided between the third internal connection pipe interface 606 and the third zero hose interface 607 of the third front baffle 6021 and the third rear baffle 6022 for connection with the third branch pipe first connection pipe 6013; a third branch pipe second connection interface 609 is provided on the other side of the third internal connection pipe interface 606 of the third front baffle 6021 and the third rear baffle 6022 for connection with the third branch pipe second connection pipe 6014.

[0094] The third expansion capsule assembly 6010 is disposed above the third partition plate 603. The third expansion capsule assembly 6010 includes a third hollow column 6010-1 and a third expansion capsule 6010-2. The third expansion capsule 6010-2 is installed on the outer periphery of the third hollow column 6010-1. The third hollow column 6010-1 and the third expansion capsule 6010-2 are placed inside the third vertical tube. A third hollow column outlet 6010-11 is provided at the top of the third hollow column 6010-1. The bottom end of the third hollow column 6010-1 is connected to the third internal connecting pipe 6011. The third internal connecting pipe 6011 is also connected to the third internal connecting pipe interface 606 on the third front baffle 6021.

[0095] Reference Figure 9The fourth branch pipe 7 includes a fourth base 701 and an elbow 100, which are connected by threads. The elbow 100 is L-shaped and has a hollow internal structure, including a vertical pipe 1001 and a horizontal pipe 1002. The bottom end of the vertical pipe 1001 is provided with an internal thread 1003, and an inner filter screen 1004 is provided 5cm-10cm above the internal thread 1003 to block gravel and coal. The end of the horizontal pipe 1002 is a nitrogen injection port, and an outer filter screen 1005 is provided 2cm-5cm inward from the nitrogen injection port of the horizontal pipe 1002 to block gravel and coal. Multiple perforations 1006 are parallel to each other along the circumference to increase the ventilation area of ​​the entire bend 100 and reduce the probability of it being completely blocked by gravel and coal. The fourth base 701 is inverted "T" shape, including a fourth hollow straight pipe 70101 with openings on both sides and a fourth vertical pipe 70102. A fourth front baffle 7021 and a fourth rear baffle 7022 are respectively provided at corresponding positions on both sides of the fourth hollow straight pipe 70101. Flanges 200 are provided on both sides of the fourth hollow straight pipe 70101. A fourth partition plate 703 is provided inside the fourth hollow straight pipe 70101. The fourth partition plate 703 is provided with multiple nitrogen through holes 400 (in this embodiment, it is provided with...). Four nitrogen passages 400 are provided, with specific dimensions and installation positions the same as those on the solid end pipe 1). The two ends of the fourth partition plate 703 are connected to the fourth front baffle 7021 and the fourth rear baffle 7022 respectively, dividing the interior of the fourth hollow straight pipe 70101 into a fourth branch pipe channel 704 and a fourth branch pipe nitrogen channel 705 for nitrogen flow. A fourth internal connecting pipe interface 706 is provided on the fourth front baffle 7021 for connection to the fourth internal connecting pipe 7012. A fourth zero hose interface 707 is provided at the corresponding positions of the fourth front baffle 7021 and the fourth rear baffle 7022 for connection to the fourth zero hose 7013. The fourth internal connecting pipe interface 706 and the fourth zero hose interface 707 of the fourth rear baffle 7022 are respectively provided with a fourth branch pipe first connecting pipe interface 708, which is used to connect with the fourth branch pipe first connecting pipe 7014; on the other side of the fourth internal connecting pipe interface 706 of the fourth front baffle 7021 and the fourth rear baffle 7022, there are respectively provided with a fourth branch pipe third connecting pipe interface 7010 and a fourth branch pipe second connecting pipe interface 709, which are used to connect with the fourth branch pipe second connecting pipe 7015, and the fourth branch pipe third connecting pipe interface 7010 is used to connect with the fourth branch pipe third connecting pipe 7016;

[0096] The fourth expansion capsule assembly 7011 is disposed above the fourth partition plate 703. The fourth expansion capsule assembly 7011 includes a fourth hollow column 7011-1 and a fourth expansion capsule 7011-2. The fourth expansion capsule 7011-2 is installed on the outer periphery of the fourth hollow column 7011-1. The fourth hollow column 7011-1 and the fourth expansion capsule 7011-2 are placed inside the fourth vertical tube 70102. A fourth hollow column outlet 7011-11 is provided at the top of the fourth hollow column 7011-1. The bottom end of the fourth hollow column 7011-1 is connected to the fourth internal connecting pipe 7012. The fourth internal connecting pipe 7012 is also connected to the fourth internal connecting pipe interface 706 on the fourth front baffle 7021.

[0097] Reference Figure 13 The transition pipe 8 includes a hollow straight pipe 801 and a transition pipe partition plate 802. Flanges 200 are provided at both ends of the hollow straight pipe 801. The transition pipe partition plate 802 is fixed axially to the hollow straight pipe 801. The two ends of the transition pipe partition plate 802 are flush with the two end faces of the hollow straight pipe 801. The transition pipe partition plate 802 divides the interior of the hollow straight pipe 801 into a transition pipe pipeline channel 803 and a transition pipe nitrogen channel 804. Multiple transition pipe through holes 805 are also provided on the hollow straight pipe 801 for installing the tail high-pressure injection hose 9.

[0098] Four bolt holes 2001 are provided on the flange 200 along the circumferential direction. Bolts are installed in the four bolt holes 2001 for connecting flanges 200 to each other.

[0099] Reference Figure 14 In this invention, the rubber pad 300 includes a ring-shaped rubber pad body, and a rubber pad partition plate 3001 is provided inside the rubber pad body.

[0100] The solid end pipe partition plate 103, the virtual end pipe partition plate 203, all connecting pipe partition plates 302, the first partition plate 403, the second partition plate 503, the third partition plate 603, the fourth partition plate 703, the transition pipe partition plate 802, and the rubber pad partition plate 3001 are located at the same horizontal position. The diameter of the rubber pad body is the same as the diameter of the solid end pipe horizontal pipe 1011, which is 8cm-12cm.

[0101] Example 2

[0102] Reference Figure 17 A control method for a special anti-deformation control device for fire prevention and extinguishing in goaf areas is disclosed. This method, implemented using the control method of the special anti-deformation control device for fire prevention and extinguishing in goaf areas described in Example 1, specifically includes the following steps:

[0103] S1, Pipeline transportation, placement and connection;

[0104] Based on the required length of the intake airway 11 of the coal face 10 requiring nitrogen injection, calculate and design the usage of each pipeline in the connecting pipeline, as well as the first high-pressure injection hose 3100, the second high-pressure injection hose 3200, the third high-pressure injection hose 3300, the fourth high-pressure injection hose 3400, the fifth high-pressure injection hose 3500, and the tail-end high-pressure injection hose 9, and transport them to the intake airway 11; and arrange each pipeline in the connecting pipeline from the inside to the outside along the intake airway 11 to facilitate subsequent connection;

[0105] Inside the intake airway 11, near the coal face 10, a solid end pipe 1 is placed. Then, multiple first connecting pipes 31, first branch pipes 4, multiple second connecting pipes 32, second branch pipes 5, multiple third connecting pipes 33, third branch pipes 6, multiple fourth connecting pipes 34, fourth branch pipes 7, multiple fifth connecting pipes 35, transition pipes 8, and virtual end pipes 2 are placed sequentially and cyclically until the stop line 12. Inside the intake airway 11, from the inside out, each pipeline and the high-pressure injection hoses (first high-pressure injection hose 3100, second high-pressure injection hose 3200, third high-pressure injection hose 3300, fourth high-pressure injection hose 3400, fifth high-pressure injection hose 3500) and the tail high-pressure injection hose 9 are connected. When connecting the flanges 200 with bolts, rubber gaskets 300 are installed to ensure sealing. The connected pipelines are connected to the output pipeline 13 of the nitrogen injection machine outside the stop line 12.

[0106] S2. Liquid injection expansion of each expansion capsule assembly and sealing test of connecting pipelines;

[0107] After the connecting pipeline is installed, high-pressure liquid injection is performed on the solid end pipe 1 and all the virtual end pipes 2, first branch pipe 4, second branch pipe 5, third branch pipe 6, and fourth branch pipe 7, including the solid end pipe expansion capsule assembly 107, first expansion capsule assembly 408, second expansion capsule assembly 509, third expansion capsule assembly 6010, fourth expansion capsule assembly 7011, and virtual end pipe expansion capsule assembly 207. During liquid injection, the five tail-end high-pressure liquid injection hoses 9 installed on the transition pipe 8 are connected to external liquid injection pumps. When the liquid injection pressure reaches 5MPa, the liquid injection is stopped. Then, the tail-end high-pressure liquid injection hoses 9 are controlled to maintain the current liquid injection pressure until the solid end pipe expansion capsule assembly 107, first expansion capsule assembly 408, second expansion capsule assembly 509, third expansion capsule assembly 6010, fourth expansion capsule assembly 7011, and virtual end pipe expansion capsule assembly 207 are fully energized. The first expansion capsule assembly 408, the second expansion capsule assembly 509, the third expansion capsule assembly 6010, the fourth expansion capsule assembly 7011, and the virtual end tube expansion capsule assembly 207 are all expanded. Then, nitrogen is injected into the connecting pipeline through a nitrogen injection machine. Since the connecting pipeline is in a closed state, the pressure in the connecting pipeline will gradually increase. The pressure is detected at any position on the connecting pipeline using a pressure gauge. When the pressure gauge shows a gradual increase, it proves that the airtightness of the connecting pipeline meets the usage requirements. If there is a leak, it can be checked and sealed by applying foam to the leaking flange 200 connection (such as replacing the rubber gasket or tightening the screws, etc.) until its airtightness meets the usage requirements.

[0108] S3, Nitrogen injection in the goaf and switching of nitrogen injection location;

[0109] Nitrogen injection locations are selected as needed. By controlling the high-pressure injection hose 9 connected to the solid end pipe 1, dummy end pipe 2, first branch pipe 4, second branch pipe 5, third branch pipe 6, or fourth branch pipe 7 at the required nitrogen injection location, pressure is released from the expansion capsule assembly 107, first expansion capsule assembly 408, second expansion capsule assembly 509, third expansion capsule assembly 6010, fourth expansion capsule assembly 7011, or dummy end pipe expansion capsule assembly 207 at the required location. This allows nitrogen injection to be performed at the desired location. As the coal face 10 advances, the location for nitrogen injection into the goaf 14 also changes continuously (e.g., ...). Figure 17 As shown, as the coal mining face 10 advances, the position of the actual end pipe 1 has changed from its initial position inside the intake airway 11 near the coal mining face 10 to the goaf 14. When switching the nitrogen injection position, it is only necessary to depressurize the expansion capsule assembly at the position where nitrogen needs to be injected, while the other expansion capsule assemblies remain in an expanded and closed state.

[0110] Because the solid end pipe 1, each branch pipe and the virtual end pipe 2 are equipped with a solid end pipe expansion capsule assembly 107, a first expansion capsule assembly 408, a second expansion capsule assembly 509, a third expansion capsule assembly 6010, a fourth expansion capsule assembly 7011 and a virtual end pipe expansion capsule assembly 207, even if the solid end pipe 1 and each virtual end pipe 2, the first branch pipe 4, the second branch pipe 5, the third branch pipe 6 and the fourth branch pipe 7 are deformed by the pressure of coal and rock in the goaf 14, they can be expanded and sealed.

[0111] To facilitate the switching of nitrogen injection positions during later mining operations, this invention employs a control method with five 100-degree bend nitrogen injection ports (i.e., solid end pipe 1, first branch pipe 4, second branch pipe 5, third branch pipe 6, and fourth branch pipe 7, or dummy end pipe 2, first branch pipe 4, second branch pipe 5, third branch pipe 6, and fourth branch pipe 7) as a group, and a transition pipe 8 is installed after each group of nitrogen injection ports. Taking the five 100-degree bend nitrogen injection ports of solid end pipe 1, first branch pipe 4, second branch pipe 5, third branch pipe 6, and fourth branch pipe 7 as a group as an example, a transition pipe 8 is installed after the fourth branch pipe 7. The spacing between the nitrogen injection ports of each bend 100 on the entire connecting pipeline can be designed according to actual needs, generally between 20m and 50m. In order to facilitate the connection between the pipeline and the high-pressure injection hose 9 installed on the transition pipe 8, and to allow for the control of the nitrogen injection ports of the five bends 100 in this group before the next group of five bends 100 enters the goaf 14, the pipeline required for the connection of the nitrogen injection ports of the five bends 100 should have an extra length of 30m-60m (that is, there should be at least one overlap between the nitrogen injection ports of adjacent bends 100 between the two groups of bends 100).

[0112] Taking the nitrogen injection port of adjacent bend 100 as 30m as an example, the total length of the pipeline required to connect to the solid end pipe 1 (including the first high-pressure injection hose 3100, the first zero hose 4010, the second high-pressure injection hose 3200, the second zero hose 5011, the third high-pressure injection hose 3300, the third zero hose 6012, the fourth high-pressure injection hose 3400, the fourth zero hose 7013, and the fifth high-pressure injection hose 3500) should not be less than 180m-210m; and the total length of the pipeline required to connect to the first branch pipe 4 is not less than 180m-210m. The total length of the connecting pipelines (including the second high-pressure injection hose 3200, the second branch pipe connecting pipe 5012, the third high-pressure injection hose 3300, the third branch pipe No. 1 connecting pipe 6013, the fourth high-pressure injection hose 3400, the fourth branch pipe No. 1 connecting pipe 7014, and the fifth high-pressure injection hose 3500) should not be less than 150m-180m, and so on. The total length of the pipeline (the fifth high-pressure nitrogen injection hose 3500) connected to the fourth branch pipe 7 should not be less than 60m-90m.

[0113] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made to the present invention should be included within the scope of protection of the present invention.

Claims

1. A deformation-resistant control device specifically for fire prevention and extinguishing in goaf areas, characterized in that, It includes connecting pipelines, a first high-pressure injection hose, a second high-pressure injection hose, a third high-pressure injection hose, a fourth high-pressure injection hose, a fifth high-pressure injection hose, and a tail end high-pressure injection hose; The connecting pipeline includes a solid end pipe and multiple first connecting pipes, first branch pipes, multiple second connecting pipes, second branch pipes, multiple third connecting pipes, third branch pipes, multiple fourth connecting pipes, fourth branch pipes, multiple fifth connecting pipes, transition pipes, and virtual end pipes that are connected sequentially and cyclically through flanges and rubber gaskets, until they are connected to the output pipeline of the nitrogen injection machine; wherein, the first first connecting pipe is connected to the solid end pipe through a flange and a rubber gasket, and the other first connecting pipes are connected to the virtual end pipes through flanges and rubber gaskets; The solid end tube, the first branch tube, the second branch tube, the third branch tube, the fourth branch tube, and the virtual end tube are respectively provided with a solid end tube expansion capsule assembly, a first expansion capsule assembly, a second expansion capsule assembly, a third expansion capsule assembly, a fourth expansion capsule assembly, and a virtual end tube expansion capsule assembly; the solid end tube expansion capsule assembly is connected to the internal connecting tube of the solid end tube, the first expansion capsule assembly is connected to the first internal connecting tube, the second expansion capsule assembly is connected to the second internal connecting tube, the third expansion capsule assembly is connected to the third internal connecting tube, the fourth expansion capsule assembly is connected to the fourth internal connecting tube, and the virtual end tube expansion capsule assembly is connected to the internal connecting tube of the virtual end tube; The first branch pipe is also equipped with a first zero hose, the second branch pipe is also equipped with a second zero hose and a second branch pipe connecting pipe, the third branch pipe is also equipped with a third zero hose, a third branch pipe first connecting pipe and a third branch pipe second connecting pipe, and the fourth branch pipe is also equipped with a fourth zero hose, a fourth branch pipe first connecting pipe, a fourth branch pipe second connecting pipe and a fourth branch pipe third connecting pipe. A first high-pressure injection hose is installed in the first connecting pipe, two second high-pressure injection hoses are installed in the second connecting pipe, three third high-pressure injection hoses are installed in the third connecting pipe, four fourth high-pressure injection hoses are installed in the fourth connecting pipe, and five fifth high-pressure injection hoses are installed in the fifth connecting pipe; five tail-end high-pressure injection hoses are installed on the transition pipe. The internal connecting pipe of the solid end tube is connected to one end of the first zero-number hose in the first branch tube through the first high-pressure injection hose in the first connecting pipe. The other end of the first zero-number hose is connected to one end of the second zero-number hose in the second branch tube through a second high-pressure injection hose in the second connecting pipe. The first internal connecting pipe is connected to one end of the second branch tube connecting pipe of the second branch tube through another second high-pressure injection hose in the second connecting pipe. The other end of the second zero-number hose is connected to one end of the third zero-number hose in the third branch tube through a third high-pressure injection hose in the third connecting pipe. The other end of the second branch tube connecting pipe is connected to the third branch tube through another third high-pressure injection hose. One end of the branch pipe No. 1 connecting pipe is connected to one end of the second internal connecting pipe via another third high-pressure injection hose; the other end of the third zero hose is connected to one end of the fourth zero hose of the fourth branch pipe via a fourth high-pressure injection hose inside the fourth connecting pipe; the other end of the third branch pipe No. 1 connecting pipe is connected to one end of the fourth branch pipe No. 1 connecting pipe via another fourth high-pressure injection hose; the other end of the third branch pipe No. 2 connecting pipe is connected to one end of the fourth branch pipe No. 2 connecting pipe via another fourth high-pressure injection hose; and the third internal connecting pipe is connected to one end of the fourth branch pipe No. 3 connecting pipe via another fourth high-pressure injection hose. The other ends of the fourth zero hose, the fourth branch pipe first connecting pipe, the fourth branch pipe second connecting pipe, and the fourth branch pipe third connecting pipe are respectively connected to the five tail end high pressure injection hoses on the transition pipe through the five fifth high pressure injection hoses in the fifth connecting pipe. The internal connecting pipe of the virtual end tube is connected to one end of the first zero hose in the first branch tube through the first high-pressure injection hose in the first connecting pipe. The first, second, third, fourth, and fifth connecting pipes have the same structure, each including a hollow straight pipe and a connecting pipe partition plate. Flanges are provided at both ends of the hollow straight pipe. The connecting pipe partition plate is fixed axially along the hollow straight pipe. The two ends of the connecting pipe partition plate are flush with the two end faces of the hollow straight pipe. The connecting pipe partition plate divides the interior of the hollow straight pipe into a connecting pipe pipeline channel and a connecting pipe nitrogen channel. The transition pipe includes a hollow straight pipe and a transition pipe partition plate. Flanges are provided at both ends of the hollow straight pipe. The transition pipe partition plate is fixed axially along the hollow straight pipe. The two ends of the partition plate are flush with the two end faces of the hollow straight pipe. The partition plate divides the interior of the hollow straight pipe into a pipeline channel and a nitrogen channel. Multiple pipeline holes are also provided on the hollow straight pipe for installing the high-pressure injection hose at the tail end.

2. The anti-deformation control device for fire prevention and extinguishing in goaf areas as described in claim 1, characterized in that, The solid end pipe includes a solid end pipe base and an elbow, which are connected by threads. The solid end pipe base is "L" shaped and includes a solid end pipe horizontal pipe and a solid end pipe vertical pipe. One side opening of the solid end pipe horizontal pipe is closed, and a flange is installed at the other side opening. A solid end pipe baffle is provided at the flange opening of the solid end pipe horizontal pipe. A solid end pipe partition plate is provided inside the solid end pipe horizontal pipe. The solid end pipe partition plate has multiple nitrogen passage holes. The solid end pipe partition plate is connected to the solid end pipe baffle, dividing the interior of the solid end pipe horizontal pipe into a solid end pipe pipeline channel and a solid end pipe nitrogen channel for nitrogen flow. The solid end pipe baffle is provided with a solid end pipe internal connection pipe interface. The solid end tube expansion capsule assembly is disposed above the solid end tube partition plate. The solid end tube expansion capsule assembly includes a solid end tube hollow column and a solid end tube expansion capsule. The solid end tube expansion capsule is installed on the outer periphery of the solid end tube hollow column. The solid end tube hollow column and the solid end tube expansion capsule are placed inside the solid end tube vertical tube. A solid end tube hollow column outlet is provided at the top of the solid end tube hollow column. The bottom end of the solid end tube hollow column is connected to the solid end tube internal connecting pipe. The solid end tube internal connecting pipe is also connected to the solid end tube internal connecting pipe interface on the solid end tube baffle.

3. The anti-deformation control device for fire prevention and extinguishing in goaf areas as described in claim 1, characterized in that, The virtual end tube includes a virtual end tube base and an elbow, which are connected by threads. The elbow is L-shaped and has a hollow internal structure, including a vertical tube and a horizontal tube. The bottom end of the vertical tube has an internal thread, and an inner filter screen is provided above the internal thread to block gravel and coal. The end of the horizontal tube is a nitrogen injection port, and an outer filter screen is provided inward from the nitrogen injection port of the horizontal tube to block gravel and coal. Multiple perforations are opened parallel to each other along the circumference of the horizontal tube near the nitrogen injection port. The virtual end tube base is inverted "T" shape, including a virtual end tube hollow straight pipe with openings on both sides and a virtual end tube vertical pipe. Flanges and virtual end tube baffles are respectively provided at the openings on both sides of the virtual end tube hollow straight pipe. A virtual end tube partition plate is provided inside the virtual end tube hollow straight pipe. The virtual end tube partition plate has multiple nitrogen through holes. The two ends of the virtual end tube partition plate are respectively connected to the virtual end tube baffles on both sides of the virtual end tube hollow straight pipe, dividing the interior of the virtual end tube hollow straight pipe into a virtual end tube pipeline channel and a virtual end tube nitrogen channel for nitrogen flow. A virtual end tube internal connecting pipe interface is provided on the virtual end tube baffle at the opening on the right side. The virtual end tube expansion capsule assembly is disposed above the virtual end tube partition plate. The virtual end tube expansion capsule assembly includes a virtual end tube hollow column and a virtual end tube expansion capsule. The virtual end tube expansion capsule is installed on the outer periphery of the virtual end tube hollow column. The virtual end tube hollow column and the virtual end tube expansion capsule are placed inside the virtual end tube vertical tube. A virtual end tube hollow column outlet is provided at the top of the virtual end tube hollow column. The bottom end of the virtual end tube hollow column is connected to the virtual end tube internal connecting pipe. The virtual end tube internal connecting pipe is also connected to the virtual end tube internal connecting pipe interface on the virtual end tube baffle.

4. The anti-deformation control device for fire prevention and extinguishing in goaf areas as described in claim 1, characterized in that, The first branch pipe includes a first base and an elbow, which are connected by threads. The elbow is L-shaped and has a hollow internal structure, including a vertical pipe and a horizontal pipe. The bottom end of the vertical pipe is provided with an internal thread, and an inner filter screen is provided above the internal thread to block gravel and coal. The end of the horizontal pipe is a nitrogen injection port, and an outer filter screen is provided inward from the nitrogen injection port of the horizontal pipe to block gravel and coal. Multiple perforations are opened parallel to each other along the circumference of the horizontal pipe near the nitrogen injection port. The first base is in the shape of an inverted "T" and includes a first hollow straight pipe with openings on both sides and a first vertical pipe. A first front baffle and a first rear baffle are respectively provided at corresponding positions on both sides of the openings of the first hollow straight pipe. Flanges are provided on both sides of the first hollow straight pipe. A first partition plate is provided inside the first hollow straight pipe. The first partition plate has multiple first nitrogen passage holes. The two ends of the first partition plate are respectively connected to the first front baffle and the first rear baffle, dividing the interior of the first hollow straight pipe into a first branch pipe pipeline channel and a first branch pipe nitrogen channel for nitrogen flow. A first internal connecting pipe interface is provided on the first front baffle for connecting to the first internal connecting pipe. A first zero hose interface is provided at corresponding positions on the first front baffle and the first rear baffle for connecting to the first zero hose. The first expansion capsule assembly is disposed above the first partition plate. The first expansion capsule assembly includes a first hollow column and a first expansion capsule. The first expansion capsule is installed on the outer periphery of the first hollow column. The first hollow column and the first expansion capsule are placed inside the first vertical tube. A first hollow column outlet is provided at the top of the first hollow column. The bottom end of the first hollow column is connected to a first internal connecting pipe. The first internal connecting pipe is also connected to a first internal connecting pipe interface on the first front baffle.

5. The anti-deformation control device for fire prevention and extinguishing in goaf areas as described in claim 1, characterized in that, The second branch pipe includes a second base and an elbow, which are connected by threads. The elbow is L-shaped and has a hollow internal structure, including a vertical pipe and a horizontal pipe. The bottom end of the vertical pipe is provided with an internal thread, and an inner filter screen is provided above the internal thread to block gravel and coal. The end of the horizontal pipe is a nitrogen injection port, and an outer filter screen is provided inward from the nitrogen injection port of the horizontal pipe to block gravel and coal. Multiple perforations are opened parallel to each other along the circumference of the horizontal pipe near the nitrogen injection port. The second base is inverted "T" shape, including a second hollow straight pipe with openings on both sides and a second vertical pipe. A second front baffle and a second rear baffle are respectively located at corresponding positions on both sides of the openings of the second hollow straight pipe. Flanges are provided on both sides of the second hollow straight pipe. A second partition plate is provided inside the second hollow straight pipe, and the second partition plate has multiple second nitrogen passage holes. The two ends of the second partition plate are respectively connected to the second front baffle and the second rear baffle, dividing the interior of the second hollow straight pipe into a second branch pipe pipeline channel and a second branch pipe nitrogen channel for nitrogen flow. A second internal connecting pipe interface is provided on the second front baffle for connection to the second internal connecting pipe. A second No. 0 hose interface is provided at corresponding positions on the second front baffle and the second rear baffle for connection to the second No. 0 hose. A second branch pipe connecting pipe interface is provided on one side of the second No. 0 hose interface on the second front baffle and the second rear baffle for connection to the second branch pipe connecting pipe. The second expansion capsule assembly is disposed above the second partition plate. The second expansion capsule assembly includes a second hollow column and a second expansion capsule. The second expansion capsule is installed on the outer periphery of the second hollow column. The second hollow column and the second expansion capsule are placed inside the second vertical tube. A second hollow column outlet is provided at the top of the second hollow column. The bottom end of the second hollow column is connected to the second internal connecting pipe. The second internal connecting pipe is also connected to the second internal connecting pipe interface on the second front baffle.

6. The anti-deformation control device for fire prevention and extinguishing in goaf areas as described in claim 1, characterized in that, The third branch pipe includes a third base and an elbow, which are connected by threads. The elbow is L-shaped and has a hollow internal structure, including a vertical pipe and a horizontal pipe. The bottom end of the vertical pipe is provided with an internal thread, and an inner filter screen is provided above the internal thread to block gravel and coal. The end of the horizontal pipe is a nitrogen injection port, and an outer filter screen is provided inward from the nitrogen injection port of the horizontal pipe to block gravel and coal. Multiple perforations are opened parallel to each other along the circumference of the horizontal pipe near the nitrogen injection port. The third base is inverted "T" shaped, comprising a third hollow straight pipe with openings on both sides and a third vertical pipe. A third front baffle and a third rear baffle are respectively located at corresponding positions on both sides of the third hollow straight pipe. Flanges are provided on both sides of the third hollow straight pipe. A third partition plate is provided inside the third hollow straight pipe, with multiple nitrogen gas passages on the partition plate. The two ends of the third partition plate are connected to the third front baffle and the third rear baffle, respectively, dividing the interior of the third hollow straight pipe into a third branch pipe pipeline channel and a third branch pipe nitrogen channel for nitrogen flow. The third front baffle plate has... The third internal connecting pipe interface is used to connect to the third internal connecting pipe. The third zero hose interface is provided at the corresponding position of the third front baffle and the third rear baffle for connecting to the third zero hose. The third branch pipe first connecting pipe interface is provided between the third internal connecting pipe interface and the third zero hose interface of the third front baffle and the third rear baffle for connecting to the third branch pipe first connecting pipe. The third branch pipe second connecting pipe interface is provided on the other side of the third internal connecting pipe interface of the third front baffle and the third rear baffle for connecting to the third branch pipe second connecting pipe. The third expansion capsule assembly is disposed above the third partition plate. The third expansion capsule assembly includes a third hollow column and a third expansion capsule. The third expansion capsule is installed on the outer periphery of the third hollow column. The third hollow column and the third expansion capsule are placed inside the third vertical tube. A third hollow column outlet is provided at the top of the third hollow column. The bottom end of the third hollow column is connected to the third internal connecting pipe. The third internal connecting pipe is also connected to the third internal connecting pipe interface on the third front baffle.

7. The anti-deformation control device for fire prevention and extinguishing in goaf areas as described in claim 1, characterized in that, The fourth branch pipe includes a fourth base and an elbow, which are connected by threads. The elbow is L-shaped and has a hollow internal structure, including a vertical pipe and a horizontal pipe. The bottom end of the vertical pipe is provided with an internal thread, and an inner filter screen is provided above the internal thread to block gravel and coal. The end of the horizontal pipe is a nitrogen injection port, and an outer filter screen is provided inward from the nitrogen injection port of the horizontal pipe to block gravel and coal. Multiple perforations are opened parallel to each other along the circumference of the horizontal pipe near the nitrogen injection port. The fourth base is inverted "T" shaped, comprising a fourth hollow straight pipe with openings on both sides and a fourth vertical pipe. A fourth front baffle and a fourth rear baffle are respectively located at corresponding positions on both sides of the fourth hollow straight pipe. Flanges are provided on both sides of the fourth hollow straight pipe. A fourth partition plate is provided inside the fourth hollow straight pipe, with multiple nitrogen gas passages on the partition plate. The two ends of the fourth partition plate are connected to the fourth front baffle and the fourth rear baffle, respectively, dividing the interior of the fourth hollow straight pipe into a fourth branch pipe pipeline channel and a fourth branch pipe nitrogen channel for nitrogen flow. A fourth internal connecting pipe interface is provided on the fourth front baffle for connection to the fourth internal connecting pipe. The fourth baffle and the fourth rear baffle are provided with a fourth zero hose interface at corresponding positions for connection to the fourth zero hose; the fourth branch pipe first connection interface is provided between the fourth internal connection pipe interface and the fourth zero hose interface on the fourth front baffle and the fourth rear baffle, respectively, for connection to the fourth branch pipe first connection pipe; on the other side of the fourth internal connection pipe interface on the fourth front baffle and the fourth rear baffle, the fourth branch pipe third connection interface and the fourth branch pipe second connection interface are provided in sequence, respectively, the fourth branch pipe second connection interface is used to connect to the fourth branch pipe second connection pipe, and the fourth branch pipe third connection interface is used to connect to the fourth branch pipe third connection pipe. The fourth expansion capsule assembly is disposed above the fourth partition plate. The fourth expansion capsule assembly includes a fourth hollow column and a fourth expansion capsule. The fourth expansion capsule is installed on the outer periphery of the fourth hollow column. The fourth hollow column and the fourth expansion capsule are placed inside the fourth vertical tube. A fourth hollow column outlet is provided at the top of the fourth hollow column. The bottom end of the fourth hollow column is connected to the fourth internal connecting pipe. The fourth internal connecting pipe is also connected to the fourth internal connecting pipe interface on the fourth front baffle.

8. A method for controlling a special anti-deformation control device for fire prevention and extinguishing in goaf areas, comprising using the special anti-deformation control device for fire prevention and extinguishing in goaf areas as described in any one of claims 1-7, characterized in that, Specifically, the following steps are included: S1, Pipeline transportation, placement and connection; Based on the required length of the intake airway of the coal face to be injected with nitrogen, calculate and design the usage of each pipeline in the connecting pipeline, as well as the first high-pressure injection hose, second high-pressure injection hose, third high-pressure injection hose, fourth high-pressure injection hose, fifth high-pressure injection hose, and tail end high-pressure injection hose, and transport them to the intake airway; then arrange each pipeline in the connecting pipeline from the inside to the outside along the intake airway to facilitate subsequent connection. Inside the intake airway, a solid end pipe is placed near the coal face. Then, multiple first connecting pipes, first branch pipes, multiple second connecting pipes, second branch pipes, multiple third connecting pipes, third branch pipes, multiple fourth connecting pipes, fourth branch pipes, multiple fifth connecting pipes, transition pipes, and virtual end pipes are placed sequentially and cyclically until the stop line. Inside the intake airway, each pipeline and the high-pressure injection hoses and tail-end high-pressure injection hoses are connected from the inside out. Rubber gaskets are installed between flanges when they are connected with bolts to ensure sealing. The connected pipelines are connected to the output pipeline of the nitrogen injection machine outside the stop line. S2. Liquid injection expansion of each expansion capsule assembly and sealing test of connecting pipelines; After the connecting pipeline is installed, high-pressure liquid injection is performed on the solid end pipe and all virtual end pipes, the first branch pipe, the second branch pipe, the third branch pipe, the fourth branch pipe, and the virtual end pipe expansion capsule assembly. During liquid injection, liquid is injected by connecting the five tail-end high-pressure injection hoses installed on the transition pipe to external injection pumps. When the injection pressure reaches 5MPa, the injection is stopped. Then, the tail-end high-pressure injection hoses are controlled to maintain the current injection pressure until the solid end pipe expansion capsule assembly, the first branch pipe expansion capsule assembly, the second branch pipe expansion capsule assembly, the third branch pipe expansion capsule assembly, the fourth branch pipe expansion capsule assembly, and the virtual end pipe expansion capsule assembly. The expansion capsule assembly, the second expansion capsule assembly, the third expansion capsule assembly, the fourth expansion capsule assembly, and the virtual end tube expansion capsule assembly are all expanded. Then, nitrogen is injected into the connecting pipeline through a nitrogen injection machine. Since the connecting pipeline is in a closed state, the pressure in the connecting pipeline will gradually increase. The pressure is detected at any position on the connecting pipeline using a pressure gauge. When the pressure gauge shows a gradual increase, it proves that the airtightness of the connecting pipeline meets the usage requirements. If there is a leak, it can be checked and sealed by applying foam to the leaking flange connection until its airtightness meets the usage requirements. S3, Nitrogen injection in the goaf and switching of nitrogen injection location; Nitrogen injection locations are selected as needed. By controlling the high-pressure injection hose connected to the solid end pipe, virtual end pipe, first branch pipe, second branch pipe, third branch pipe, or fourth branch pipe of the required nitrogen injection location, the pressure of the expansion capsule assembly of the solid end pipe, first expansion capsule assembly, second expansion capsule assembly, third expansion capsule assembly, fourth expansion capsule assembly, or virtual end pipe is depressurized, thereby achieving nitrogen injection at the required location. As the coal mining face continues to advance, the location for nitrogen injection into the goaf is also constantly changing. When switching nitrogen injection locations, it is only necessary to depressurize the expansion capsule assembly at the location requiring nitrogen injection while keeping the other expansion capsule assemblies in an expanded and closed state.

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