Underground coal mine fire preventing and extinguishing inhibitor spraying device

Abstract

The invention relates to the technical field of coal mining, and particularly discloses a coal mine underground fire preventing and extinguishing inhibitor spraying device which comprises a mixing box, one side of the mixing box is fixedly sleeved with a connecting box, the side, away from the mixing box, of the connecting box is fixedly sleeved with a connecting pipe, and the bottom of the mixing box is fixedly sleeved with a box. The side, away from the connecting box, of the mixing box is fixedly sleeved with a discharging box. Through cooperation of the gas-liquid mixing mechanism and the spraying mechanism, spraying of the stopping agent for the underground coal mine roadway is achieved, operation is easy, electrification is not needed, non-electric driving can be achieved, the stopping agent is poured into a liquid supplementing box by additionally arranging the liquid supplementing mechanism, and the stopping agent can be sprayed to the underground coal mine roadway. And when the gas-liquid mixing mechanism does not need to be used, the problem that the stopping agent still flows outwards can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining, in particular to an inhibitor spraying device for fire prevention and extinguishing in underground coal mines. Background Art

[0002] At present, the inhibitor spraying device in coal mines is mainly electrically driven. Although the electric drive device can provide stable power, it is limited by the power supply conditions and safety regulations in coal mines. For example, it is forbidden to use live equipment in the return air tunnel area, and the voltage levels in the mine are diverse. The power demand of small equipment does not match the existing voltage level, which makes it difficult to obtain electricity. At the same time, there are great safety hazards in the use of electricity in coal mines. Therefore, we proposed a non-electrically driven inhibitor spraying device for coal mine tunnels. Summary of the invention

[0003] The purpose of the present invention is to provide an inhibitor spraying device for fire prevention and extinguishing in coal mines, which solves the problems raised in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: an inhibitor spraying device for fire prevention and extinguishing in coal mines, comprising a mixing box, a connecting box is fixedly sleeved on one side of the mixing box, a connecting pipe is fixedly sleeved on the side of the connecting box away from the mixing box, a packing box is fixedly sleeved on the bottom of the mixing box, and a discharge box is fixedly sleeved on the side of the mixing box away from the connecting box; The interior of the mixing box is provided with a gas-liquid mixing mechanism for mixing the inhibitor with the high-pressure gas, and the gas-liquid mixing mechanism includes a fixed block and a liquid outlet pipe. The fixed block is fixedly sleeved on the inner wall of the connecting box, and an air inlet pipe is sleeved inside the fixed block. The air inlet pipe passes through the top of the box and extends to the inside of the box and is located at the top of the box. The liquid outlet pipe is fixedly sleeved on the top of the box, and the bottom of the liquid outlet pipe is located inside the box. The liquid outlet pipe is located outside the top of the box and is fixedly sleeved with a liquid collecting pipe; A spraying mechanism for spraying is provided on the side of the discharge box away from the mixing box, and the spraying mechanism includes a connecting soft box and a bracket, one side of the connecting soft box is fixedly sleeved with the side of the discharge box away from the mixing box, the other side of the connecting soft box is fixedly sleeved with a liquid collecting box, the side of the liquid collecting box away from the connecting soft box is fixedly sleeved with an atomizing nozzle, the top of the liquid collecting box is fixedly connected with a connecting block, one end of the bracket is fixedly connected to the top outer wall of the discharge box, and the other end of the side of the bracket is rotatably connected to one side of the connecting block; The front of the mixing box is provided with a liquid replenishing mechanism for replenishing the box, the interior of the connecting box is provided with a pressure relief mechanism for relieving the pressure of the high-pressure gas entering the mixing box, and the side of the discharge box away from the mixing box is provided with an adjustment mechanism for adjusting the angle of the liquid collecting box.

[0005] Furthermore, there are two liquid outlet pipes, which are mirror-symmetrical about the mid-vertical line of the box, and the top ends of the two liquid outlet pipes are both sleeved with the inside of the liquid collecting pipe.

[0006] Furthermore, there are multiple atomizing nozzles, which are arranged in an equidistant array.

[0007] Furthermore, there are two brackets, which are mirrored with respect to the perpendicular midline of the connection block, and the two sides of the connection block are rotationally connected to the sides of the two brackets that are close to each other.

[0008] The top of the support frame is movably connected to the inner wall of the fixing frame, and the fixing frame is connected with the fixing means of the fixing frame to the fixing surface.

[0009] Furthermore, the inner angle of the movable plate is 130-140 degrees.

[0010] Furthermore, the pressure relief mechanism includes a pressure relief pipe, an outer wall of the pressure relief pipe is fixedly sleeved on the inside of the fixed block, two ends of the pressure relief pipe are connected to the outside of the two sides of the fixed block, the inner wall of the pressure relief pipe is fixedly connected to a limiting frame on the side close to the mixing box, the inner wall of the limiting frame is slidably connected to a movable rod, the end of the movable rod away from the mixing box is fixedly connected to a blocking plate, the side of the blocking plate and the limiting frame close to each other is fixedly connected to a tension spring, the tension spring is sleeved on the outer wall of the movable rod, the inner wall of the pressure relief pipe away from the mixing box is fixedly sleeved with a fixing ring, the side of the fixing ring close to the blocking plate is in contact with the side of the blocking plate away from the movable rod.

[0011] Furthermore, the adjustment mechanism includes a support plate and a support block, the support plate is fixedly connected between the sides of the two brackets that are close to each other, the support block is fixedly connected to the side of the top outer wall of the liquid collecting box away from the connection soft box, the interior of the liquid collecting box is fixedly sleeved with a hanging rope, and the side of the support plate close to the hanging rope is fixedly connected with a hook.

[0012] Furthermore, the hooks are multiple and arranged in an equidistant array.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention realizes the spraying of inhibitor in underground coal mine tunnels through the cooperation of the set gas-liquid mixing mechanism and the spraying mechanism, and the operation is simple, and no electricity is required, and non-electric drive can be realized. By adding a liquid replenishing mechanism, the inhibitor can be poured into the liquid replenishing tank, so as to facilitate the replenishment of the gas-liquid mixing mechanism with the inhibitor, and the problem of the inhibitor still flowing out when it is not needed can be avoided. At the same time, the set pressure relief mechanism can facilitate the wind pressure to enter the interior of the air intake pipe, and it can also avoid excessive pressure. At the same time, the wind pressure can achieve a better spraying effect of the atomizing nozzle, and the adjustment mechanism can also facilitate the adjustment of the angle of the atomizing nozzle and the spraying position, thereby increasing the wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a three-dimensional structural schematic diagram of a retardant spraying device for fire prevention and extinguishing in underground coal mines according to the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the side of a retardant spraying device for fire prevention and extinguishing in coal mines according to the present invention; Figure 3 It is a three-dimensional structural schematic diagram of a cross-sectional view of a retardant spraying device for fire prevention and extinguishing in underground coal mines of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of a cross-sectional view of a mixing box of a retardant spraying device for fire prevention and extinguishing in underground coal mines according to the present invention; Figure 5 It is a three-dimensional structural schematic diagram of a cross-sectional view of a packaging of a retardant spraying device for fire prevention and extinguishing in underground coal mines according to the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure inside the connection box of a retardant spraying device for fire prevention and extinguishing in underground coal mines according to the present invention; Figure 7 It is a three-dimensional structural schematic diagram of a cross-sectional view of a pressure relief pipe of a retardant spraying device for fire prevention and extinguishing in underground coal mines according to the present invention; Figure 8 The invention discloses a retardant spraying device for preventing and extinguishing fire in coal mines. Figure 2 Schematic diagram of the three-dimensional structure enlarged at point A in the middle.

[0015] In the figure: 1. Mixing box; 2. Connecting box; 3. Connecting pipe; 4. Packing box; 5. Discharging box; 6. Gas-liquid mixing mechanism; 61. Fixing block; 62. Air inlet pipe; 63. Discharging pipe; 64. Collecting pipe; 7. Spraying mechanism; 71. Connecting soft box; 72. Collecting box; 73. Atomizing nozzle; 74. Connecting block; 75. Bracket; 8. Refilling mechanism; 81. Refilling box; 82. Feeding hopper; 83. Hopper cover; 84. Connecting box; 85. Limiting strip; 86, upper baffle; 87, sliding plate; 88, fixed frame; 89, movable plate; 810, connecting frame; 811, floating plate; 812, supporting frame; 813, limiting rod; 9, pressure relief mechanism; 91, pressure relief pipe; 92, limiting frame; 93, movable rod; 94, tension spring; 95, blocking plate; 96, fixing ring; 10, adjusting mechanism; 101, supporting plate; 102, supporting block; 103, hook; 104, hanging rope. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0017] like Figures 1 to 8 As shown, the present invention provides a technical solution: an inhibitor spraying device for fire prevention and extinguishing in coal mines, comprising a mixing box 1, a connecting box 2 is fixedly sleeved on one side of the mixing box 1, a connecting pipe 3 is fixedly sleeved on the side of the connecting box 2 away from the mixing box 1, a packing box 4 is fixedly sleeved on the bottom of the mixing box 1, and a discharge box 5 is fixedly sleeved on the side of the mixing box 1 away from the connecting box 2; A gas-liquid mixing mechanism 6 for mixing the inhibitor with the high-pressure gas is arranged inside the mixing box 1. The gas-liquid mixing mechanism 6 comprises a fixed block 61 and a liquid outlet pipe 63. The fixed block 61 is fixedly sleeved on the inner wall of the connecting box 2. An air inlet pipe 62 is sleeved inside the fixed block 61. The air inlet pipe 62 passes through the top of the box 4 and extends to the inside of the box 4. The liquid outlet pipe 63 is fixedly sleeved on the top of the box 4. The bottom of the liquid outlet pipe 63 is located inside the box 4. The liquid outlet pipe 63 is located outside the top of the box 4 and is fixedly sleeved with a liquid collecting pipe 64. A spraying mechanism 7 for spraying is provided on the side of the discharge box 5 away from the mixing box 1. The spraying mechanism 7 includes a connecting soft box 71 and a bracket 75. One side of the connecting soft box 71 is fixedly sleeved with the side of the discharge box 5 away from the mixing box 1. The other side of the connecting soft box 71 is fixedly sleeved with a liquid collecting box 72. The side of the liquid collecting box 72 away from the connecting soft box 71 is fixedly sleeved with an atomizing nozzle 73. The top of the liquid collecting box 72 is fixedly connected with a connecting block 74. One end of the bracket 75 is fixedly connected to the top outer wall of the discharge box 5. The other end of the side of the bracket 75 is rotatably connected to one side of the connecting block 74. A liquid replenishing mechanism 8 for replenishing the packaging box 4 is provided on the front of the mixing box 1, a pressure relief mechanism 9 for relieving the pressure of the high-pressure gas entering the connecting box 2 from the mixing box 1 is provided inside the connecting box 2, and an adjustment mechanism 10 for adjusting the angle of the liquid collecting box 72 is provided on the side of the discharge box 5 away from the mixing box 1.

[0018] There are two liquid outlet pipes 63, and they are mirror-symmetrical with the midline of the box 4. The top ends of the two liquid outlet pipes 63 are both connected to the inside of the collecting pipe 64. There are multiple atomizing nozzles 73, and they are arranged in an equidistant array. There are two brackets 75, and they are mirror-symmetrical with the midline of the connecting block 74. The two sides of the connecting block 74 are rotatably connected to the sides of the two brackets 75 that are close to each other.

[0019] The liquid replenishing mechanism 8 includes a liquid replenishing box 81 and a support frame 812. The liquid replenishing box 81 is fixedly connected to the front outer wall of the mixing box 1. The top of the liquid replenishing box 81 is fixedly sleeved with a feed hopper 82, and the top of the feed hopper 82 is detachably connected with a bucket cover 83. The side of the liquid replenishing box 81 close to the box 4 is fixedly sleeved with a connecting box 84, and the inner wall of the connecting box 84 is fixedly connected with four limit bars 85 near the inside of the box 4. The four limit bars 85 are away from the two sides of the box 4. The top of the side where the limit bars 85 are close to each other is fixedly connected with an upper baffle 86, and the side where the four limit bars 85 are close to each other is slidably connected with a sliding plate. The movable plate 87 and the limit bar 85 are fixedly connected to the fixing frame 88 on one side close to the box 4, the bottom of the support frame 812 is fixedly connected to the bottom inner wall of the box 4, the top of the support frame 812 is movably connected to the movable plate 89, the movable plate 89 is fixedly sleeved on the inner side close to the fixing frame 88, the outer wall of the limit rod 813 is slidably connected to the inner wall of the fixing frame 88, the side of the support frame 812 away from the fixing frame 88 is movably connected to the connecting frame 810, the top of the connecting frame 810 is fixedly connected to the floating plate 811, and the inner angle of the movable plate 89 is 130-140 degrees.

[0020] The pressure relief mechanism 9 includes a pressure relief pipe 91, the outer wall of which is fixedly sleeved on the inside of the fixed block 61, the two ends of the pressure relief pipe 91 are connected to the outside of the two sides of the fixed block 61, the inner wall of the pressure relief pipe 91 is fixedly connected to a limiting frame 92 on the side close to the mixing box 1, the inner wall of the limiting frame 92 is slidably connected to a movable rod 93, the end of the movable rod 93 away from the mixing box 1 is fixedly connected to a blocking plate 95, the side where the blocking plate 95 and the limiting frame 92 are close to each other is fixedly connected to a tension spring 94, the tension spring 94 is sleeved on the outer wall of the movable rod 93, the inner wall of the pressure relief pipe 91 away from the mixing box 1 is fixedly sleeved with a fixing ring 96, the side of the fixing ring 96 close to the blocking plate 95 is in contact with the side of the blocking plate 95 away from the movable rod 93.

[0021] The adjustment mechanism 10 includes a support plate 101 and a support block 102. The support plate 101 is fixedly connected between the sides of the two brackets 75 that are close to each other. The support block 102 is fixedly connected to the side of the top outer wall of the liquid collecting box 72 away from the connection soft box 71. A hanging rope 104 is fixedly sleeved inside the liquid collecting box 72. A hook 103 is fixedly connected to the side of the support plate 101 close to the hanging rope 104. There are multiple hooks 103, which are arranged in an equidistant array.

[0022] The working principle and use process of the present invention are as follows: first, a device shell is formed by a mixing box 1, a connecting box 2, a connecting pipe 3, a box 4, and a discharge box 5. By adding a gas-liquid mixing mechanism 6, the high-pressure gas in the coal mine is connected to the connecting pipe 3 through a pipeline, and then the high-pressure gas will be blown from the connecting pipe 3 to the inside of the connecting box 2. The fixed block 61 fixedly connected to the inside of the connecting box 2 can block the high-pressure wind in the connecting box 2, so that it is easier to enter the inside of the air inlet pipe 62, and the high-pressure gas inside the connecting box 2 will rush into the inside of the box 4 through the air inlet pipe 62, and the high-pressure gas inside the box 2 will pass through the air inlet pipe 62. The inhibitor is loaded, and then the inhibitor can be flushed into the inside of the collecting pipe 64 from the inside of the two liquid outlet pipes 63, and then the inhibitor can enter the inside of the mixing box 1, and then enter the inside of the discharge box 5, and through the added spraying mechanism 7, the high-pressure wind enters the inside of the connecting soft box 71 from the discharge box 5 under the action of pressure, and enters the inside of the collecting box 72 through the connecting soft box 71, and then sprayed out through the atomizing nozzle 73, so first of all, the flame retardant function is realized, and at the same time, the bracket 75 on the discharge box 5 can support the connecting block 74, and the collecting box 72 is supported by the connecting block 74; By setting up the liquid replenishing mechanism 8, the liquid replenishing box 81 fixed on the front outer wall of the mixing box 1 is convenient for storing the inhibitor. When it is necessary to pour the inhibitor from the liquid replenishing box 81, the movable rod 93 is opened, and then the inhibitor can be poured into the liquid replenishing box 81 through the feed hopper 82. The inhibitor inside the liquid replenishing box 81 can enter the interior of the box 4 from the connecting box 84. At the same time, the supporting frame 812 can be supported by the connecting box 84, and the supporting frame 812 supports the movable plate 89, and the movable plate 89 can be movable. Because there is a floating plate 811 inside the box 4, the floating plate 811 can be affected by the inhibitor inside the box 4, so that the floating plate 811 can float. The floating plate 811 is affected by the buoyancy of the inhibitor. The movable plate 89 can be pulled upwards by the floating plate 811, and the movable plate 89 can be pulled by the connecting frame 810, so that the movable plate 89 will press the limit rod 813 downwards, and the limit rod 813 can press the fixed frame 88, and the outer wall of the limit rod 813 is slidably connected with the inner wall of the fixed frame 88, so that the sliding plate 87 is pressed downwards, and the sliding plate 87 will be limited by the four limit bars 85, and the upper baffle 86 will block the inhibitor of the connecting box 84 from entering the box 4. After the inhibitor inside the box 4 is flushed out, it moves downwards through the floating plate 811, and then the sliding plate 87 moves upwards. Therefore, the inhibitor in the liquid replenishing tank 81 is convenient for replenishing the inhibitor inside the box 4 through the connecting box 84; The pressure relief mechanism 9 is provided, and the pressure relief pipe 91 is fixedly sleeved inside the fixed block 61. Due to excessive pressure, when the high-pressure wind blocked by the fixed block 61 enters the inside of the pressure relief pipe 91, the wind pressure is blocked by the fixed block 61, and the pressure gradually increases. Then, the wind pressure squeezes the blocking plate 95 from the fixed ring 96, and the blocking plate 95 can push the movable rod 93, and cooperate with the support of the limit frame 92 to squeeze the tension spring 94, so that it enters the inside of the mixing box 1 from the inside of the pressure relief pipe 91, so that the atomizing nozzle 73 can spray better, so that the spraying effect is better; Through the setting of the adjustment mechanism 10, a support plate 101 is fixedly connected between the sides of the two brackets 75 that are close to each other, hooks 103 arranged in an equidistant array are fixed on the support plate 101, a support block 102 is fixed on the liquid collecting box 72, and a hanging rope 104 is fixedly connected to the inside of the support block 102, so that it can be hung on the hook 103 through the hanging rope 104, and by hanging the hook 103 at different heights, the angle of the liquid collecting box 72 away from the connection soft box 71 can be effectively adjusted, so as to facilitate better spraying.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A retardant spraying device for fire prevention and extinguishing in coal mines, comprising a mixing box (1), characterized in that: A connection box (2) is fixedly sleeved on one side of the mixing box (1), a connection pipe (3) is fixedly sleeved on the side of the connection box (2) away from the mixing box (1), a packing box (4) is fixedly sleeved on the bottom of the mixing box (1), and a discharge box (5) is fixedly sleeved on the side of the mixing box (1) away from the connection box (2); A gas-liquid mixing mechanism (6) for mixing the inhibitor with the high-pressure gas is arranged inside the mixing box (1), and the gas-liquid mixing mechanism (6) comprises a fixed block (61) and a liquid outlet pipe (63), the fixed block (61) is fixedly sleeved on the inner wall of the connecting box (2), an air inlet pipe (62) is sleeved inside the fixed block (61), the air inlet pipe (62) passes through the top of the box (4) and extends to the inside of the box (4), and is located at the top of the box (4), the liquid outlet pipe (63) is fixedly sleeved on the top of the box (4), the bottom of the liquid outlet pipe (63) is located inside the box (4), and the liquid outlet pipe (63) is located outside the top of the box (4) and is fixedly sleeved with a liquid collecting pipe (64); A spraying mechanism (7) for spraying is provided on a side of the discharge box (5) away from the mixing box (1), the spraying mechanism (7) comprising a connecting soft box (71) and a bracket (75), one side of the connecting soft box (71) being fixedly sleeved with a side of the discharge box (5) away from the mixing box (1), the other side of the connecting soft box (71) being fixedly sleeved with a liquid collecting box (72), the side of the liquid collecting box (72) away from the connecting soft box (71) being fixedly sleeved with an atomizing nozzle (73), the top of the liquid collecting box (72) being fixedly sleeved with a connecting block (74), one end of the bracket (75) being fixedly connected to the top outer wall of the discharge box (5), and the other end of the side surface of the bracket (75) being rotatably connected to one side of the connecting block (74); The front of the mixing box (1) is provided with a liquid replenishing mechanism (8) for replenishing the liquid in the packing box (4), the interior of the connecting box (2) is provided with a pressure relief mechanism (9) for relieving the pressure of the high-pressure gas entering the connecting box (2) from the mixing box (1), and the side of the discharge box (5) away from the mixing box (1) is provided with an adjustment mechanism (10) for adjusting the angle of the liquid collecting box (72).

2. The retardant spraying device for fire prevention and extinguishing in underground coal mines according to claim 1, characterized in that: There are two liquid outlet pipes (63) which are mirror-symmetrical about the perpendicular midline of the box (4), and the top ends of the two liquid outlet pipes (63) are sleeved inside the liquid collecting pipe (64).

3. The retardant spraying device for fire prevention and extinguishing in underground coal mines according to claim 2, characterized in that: The atomizing nozzles (73) are multiple and arranged in an equidistant array.

4. The retardant spraying device for fire prevention and extinguishing in underground coal mines according to claim 3, characterized in that: There are two brackets (75), which are mirror images of the perpendicular midline of the connection block (74). Both sides of the connection block (74) are rotatably connected to the sides of the two brackets (75) that are close to each other.

5. The device for spraying an inhibitor for preventing and extinguishing fire in underground coal mines according to claim 4, characterized in that: The liquid replenishing mechanism (8) comprises a liquid replenishing box (81) and a support frame (812); the liquid replenishing box (81) is fixedly connected to the front outer wall of the mixing box (1); a feed hopper (82) is fixedly sleeved on the top of the liquid replenishing box (81); a hopper cover (83) is detachably connected to the top of the feed hopper (82); a connecting box (84) is fixedly sleeved on a side of the liquid replenishing box (81) close to the box (4); four limit bars (85) are fixedly connected to the inner wall of the connecting box (84) close to the inside of the box (4); two sides of the four limit bars (85) away from the box (4); and an upper baffle (86) is fixedly connected to the top of a side of the limit bars (85) close to each other. The four limit bars (85) A sliding plate (87) is slidably connected to the side close to each other, a side of the limit bar (85) close to the box (4) is fixedly connected to a fixing frame (88), the bottom of the support frame (812) is fixedly connected to the bottom inner wall of the box (4), the top of the support frame (812) is movably connected to a movable plate (89), the inner side of the movable plate (89) close to the fixing frame (88) is fixedly sleeved with a limit rod (813), the outer wall of the limit rod (813) is slidably connected to the inner wall of the fixing frame (88), the side of the support frame (812) away from the fixing frame (88) is movably connected to a connecting frame (810), and the top of the connecting frame (810) is fixedly connected to a floating plate (811).

6. The retardant spraying device for fire prevention and extinguishing in underground coal mines according to claim 5, characterized in that: The inner angle of the movable plate (89) is 130-140 degrees.

7. The retardant spraying device for fire prevention and extinguishing in underground coal mines according to claim 6, characterized in that: The pressure relief mechanism (9) comprises a pressure relief pipe (91), the outer wall of the pressure relief pipe (91) is fixedly sleeved inside the fixed block (61), the two ends of the pressure relief pipe (91) are connected to the outside of the two sides of the fixed block (61), the inner wall of the pressure relief pipe (91) is fixedly connected to a limiting frame (92) on a side close to the mixing box (1), the inner wall of the limiting frame (92) is slidably connected to a movable rod (93), the end of the movable rod (93) away from the mixing box (1) is fixedly connected to a blocking plate (95), the side of the blocking plate (95) and the limiting frame (92) close to each other is fixedly connected to a tension spring (94), the tension spring (94) is sleeved on the outer wall of the movable rod (93), the inner wall of the pressure relief pipe (91) is fixedly sleeved on a side close to the mixing box (1) with a fixing ring (96), the side of the fixing ring (96) close to the blocking plate (95) is in contact with the side of the blocking plate (95) away from the movable rod (93).

8. The retardant spraying device for fire prevention and extinguishing in underground coal mines according to claim 7, characterized in that: The adjustment mechanism (10) comprises a support plate (101) and a support block (102); the support plate (101) is fixedly connected between the sides of the two brackets (75) that are close to each other; the support block (102) is fixedly connected to a side of the top outer wall of the liquid collecting box (72) that is away from the connection soft box (71); a hanging rope (104) is fixedly sleeved inside the liquid collecting box (72); and a hook (103) is fixedly connected to a side of the support plate (101) that is close to the hanging rope (104).

9. The retardant spraying device for fire prevention and extinguishing in underground coal mines according to claim 8, characterized in that: The hooks (103) are in plurality and arranged in an equidistant array.

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