Gas-liquid two-phase flow control post-drainage goaf fire monitoring device

Abstract

The invention relates to the technical field of goaf fire monitoring, in particular to a monitoring device for goaf fire after gas-liquid two-phase flow prevention and drainage. The invention provides a gas-liquid two-phase flow control post-drainage goaf fire monitoring device which can reduce the concentration of inflammable gas in a goaf and avoid potential fire and explosion risks. A gas-liquid two-phase flow control post-drainage goaf fire monitoring device comprises a mounting block, clamping plates, threaded rods and the like, the left and right parts of the mounting block are slidably connected with the clamping plates, and the upper sides of the left and right parts of the mounting block are rotatably connected with the threaded rods. When the gas detector monitors that the concentration of inflammable gas in the goaf is high, water is fed into the water storage cylinder through the water receiving pipe, then the water is atomized and sprayed out through the spray head, the inflammable gas is diluted and cooled through water mist, and the effects that the concentration of the inflammable gas in the goaf can be reduced, and potential fire and explosion risks are avoided are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of goaf fire monitoring, and in particular to a goaf fire monitoring device after gas-liquid two-phase flow prevention and control drainage. Background Art

[0002] The gas-liquid two-phase flow goaf fire monitoring device after drainage is a device used in coal mines and other mines to monitor the risk of goaf fire. This device monitors the gas composition, temperature, humidity and other parameters in the gas-liquid two-phase flow to detect fire hazards in time and take corresponding measures. However, the existing goaf fire monitoring device cannot dilute the flammable gas when it detects a high concentration of flammable gas in the goaf. After the flammable gas accumulates in the goaf, the risk of explosion is high and it is more dangerous.

[0003] Therefore, a gas-liquid two-phase flow fire monitoring device for goaf area after water drainage has been developed, which can reduce the concentration of flammable gas in the goaf and avoid potential fire and explosion risks. Summary of the invention

[0004] In order to overcome the shortcomings of existing goaf fire monitoring devices that, when detecting a high concentration of flammable gas in the goaf, the flammable gas concentration in the goaf is high, resulting in a high risk of explosion and being more dangerous, the present invention provides a goaf fire monitoring device after drainage with gas-liquid two-phase flow prevention and control, which can reduce the concentration of flammable gas in the goaf and avoid potential fire and explosion risks.

[0005] The technical solution is: a gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage, including a mounting block, a clamping plate, a threaded rod, a bidirectional motor, a monitoring component and a dilution component. The left and right parts of the mounting block are both slidably connected with clamping plates, and the upper sides of the left and right parts of the mounting block are both rotatably connected with threaded rods, and the threaded directions of the threaded rods are opposite. A bidirectional motor is connected to the upper middle part of the mounting block, and the threaded rods are connected to the output shafts of adjacent bidirectional motors. The clamping plates are threadedly connected to the adjacent threaded rods. The mounting block is provided with a monitoring component capable of monitoring the fire situation in the goaf, and the mounting block is also provided with a dilution component capable of diluting flammable gas.

[0006] As a further preferred solution, the splints are all arc-shaped.

[0007] As a further preferred solution, the monitoring component includes a fire detector and a gas detector. The fire detector is connected to the upper rear side of the mounting block, and the gas detector is connected to the upper front side of the mounting block.

[0008] As a further preferred scheme, the dilution component includes a first mounting plate, a water storage cylinder, a nozzle and a water connecting pipe. The front and rear parts of the mounting block are connected to the first mounting plate, the left and right parts of the first mounting plate are rotatably connected to the water storage cylinder, the outer side of the water storage cylinder is connected to the nozzle, the inner side of the water storage cylinder is connected to the water connecting pipe, and the water connecting pipes pass through the mounting block. When the gas detector detects that the concentration of flammable gas in the goaf is high, water is passed into the water storage cylinder through the water connecting pipe, and then the water is atomized and sprayed out through the nozzle, so that the water mist dilutes and cools the flammable gas.

[0009] As a further preferred scheme, it also includes a circulation component, which includes a second mounting plate, a connecting plate and a fan. The second mounting plates are connected to the left and right sides of the mounting block. The second mounting plates are rotatably connected to the connecting plates. The connecting plates are connected to multiple fans. The fans on the connecting plates are started to suck in the flammable gas and gather it at the nozzle.

[0010] As a further preferred scheme, it also includes an adjustment component, which includes an electric push rod, a rack and a gear. The upper side of the second mounting plate is connected to the electric push rod, and the telescopic end of the electric push rod is connected to the rack. The front and rear parts of the connecting plate are connected to gears, and the gears are meshed with adjacent racks. When the concentration of flammable gas is high in a certain area in the goaf, the electric push rod is started to push the rack to move, so that the rack and the gear mesh and move, driving the connecting plate to rotate on the second mounting plate, so that the fan rotates to align with the area with higher concentration of flammable gas.

[0011] As a further preferred scheme, it also includes a rotating component, which includes an oblique push plate, a pushing frame, a guide frame, a ring and a rotating rod. The upper side of the right rack is connected to the oblique push plate, and the middle part of the mounting block is connected to two front and rear guide frames, and the guide frames are clamped with pushing frames. The upper sides of the left and right parts of the pushing frames are rotatably connected to the rings, and the rings are connected to the rotating rods, and the rotating rods are connected to adjacent water storage cylinders. When the rack moves, it drives the oblique push plate to move, so that the oblique push plate drives the pushing frame to move, and the guide frame guides the pushing frame, so that the ring rotates and moves, and then the rotating rod drives the water storage cylinder to rotate and align with the fan.

[0012] As a further preferred scheme, it also includes a locking assembly, which includes a chuck, a locking rod and a spring. The chucks are connected to the outside of the water storage cylinder, and the left and right sides of the first mounting plate that are away from each other are slidably connected with locking rods. The locking rods are engaged with adjacent chucks, and springs are connected between the locking rods and the connected first mounting plates. When the water storage cylinder rotates, the chuck is driven to rotate, so that the locking rod is separated from the chuck, and the spring is squeezed and contracted. After the chuck stops rotating, the spring rebounds, so that the locking rod moves and engages with the chuck again.

[0013] As a further preferred scheme, it also includes a protection component, which includes a protection cover, a baffle, an inclined plate, a support block, a fixed block and a torsion spring. The upper sides of the front and rear parts of the fixed block are connected to the protection cover, the fire detector and the gas detector are both located inside the adjacent protection cover, the protection cover is slidably connected with a baffle, the right side of the protection cover that is away from each other is slidably connected with an inclined plate, the baffles pass through the adjacent inclined plates, the lower part of the inclined plates are clamped with support blocks, the right part of the pushing frame is connected with a fixed block, the fixed blocks are rotatably connected to the adjacent support blocks, and the support blocks are connected to the connected fixed blocks with two front and rear torsion springs. When the pushing frame moves, it drives the fixed block to move, so that the support block pushes the inclined plate to move under the action of the torsion spring, and then the baffle moves upward along the inclined plate, so that the protection cover is no longer sealed, and the gas can flow into the protection cover, when the inclined plate moves to the limit, the support block rotates to disengage from the inclined plate, and after the pushing frame is reset, the inclined plate squeezes the support block to rotate, and the inclined plate and the support block are re-clamped and matched by the action of the torsion spring.

[0014] As a further preferred solution, ventilation slots are provided on both left and right sides of the protective cover.

[0015] The beneficial effects are: 1. When the gas detector detects that the concentration of flammable gas in the goaf is high, water is passed into the water storage cylinder through the water pipe, and then the water is atomized and sprayed out through the nozzle, so that the water mist dilutes and cools the flammable gas, thereby achieving the effect of reducing the concentration of flammable gas in the goaf and avoiding potential fire and explosion risks.

[0016] 2. The present invention starts the fan on the connecting plate to suck in the flammable gas and gather it at the nozzle, thereby achieving the effect of accelerating the dilution efficiency of the flammable gas and reducing the risk of fire and explosion.

[0017] 3. The present invention starts the electric push rod to push the rack to move, so that the rack and the gear mesh and move, driving the connecting plate to rotate on the second mounting plate, so that the fan rotates to align with the area with higher concentration of flammable gas, thereby achieving the effect of being able to adjust the angle of the fan to accelerate the dilution efficiency of the flammable gas.

[0018] 4. The present invention drives the inclined push plate to move while the rack moves, so that the inclined push plate drives the push frame to move, and the guide frame guides the push frame, so that the ring rotates and moves, and then the rotating rod drives the water storage cylinder to rotate and align with the fan, thereby achieving the effect of being able to adjust the angle of the water storage cylinder and ensuring that the water storage cylinder is aligned with the fan to dilute the flammable gas.

[0019] 5. The present invention drives the chuck to rotate while the water storage cylinder rotates, so that the clamping rod is separated from the chuck, and the spring is squeezed and contracted. After the chuck stops rotating, the spring rebounds, so that the clamping rod moves and re-engages with the chuck, thereby achieving the effect of being able to clamp the water storage cylinder and improving the accuracy of angle adjustment of the water storage cylinder.

[0020] 6. After the push frame is reset, the inclined plate squeezes the support block to rotate, and the inclined plate and the support block are re-engaged through the force of the torsion spring, so that the baffle moves downward to reset the closed protective cover, thereby achieving the effect of protecting the fire detector and the gas detector and preventing the fire detector and the gas detector from moisture and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the first part of the present invention.

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the second part of the present invention.

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the third part of the present invention.

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the fourth part of the present invention.

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the fifth part of the present invention.

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the sixth part of the present invention.

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the seventh part of the present invention.

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the eighth part of the present invention.

[0030] Fig.10 It is a schematic diagram of the three-dimensional structure of the locking assembly of the present invention.

[0031] Fig.11 It is a partial three-dimensional structural schematic diagram of the locking assembly of the present invention.

[0032] Fig.12 It is a schematic diagram of the three-dimensional structure of the protection component of the present invention.

[0033] Fig.13 It is a schematic diagram of a partial three-dimensional structure of the protection component of the present invention.

[0034] Wherein: 1-mounting block, 2-clamping plate, 3-threaded rod, 4-bidirectional motor, 5-fire detector, 6-gas detector, 7-first mounting plate, 8-water storage cylinder, 9-sprinkler, 10-water pipe, 11-second mounting plate, 12-connecting plate, 13-fan, 14-electric push rod, 15-rack, 16-gear, 17-oblique push plate, 18-push frame, 181-guide frame, 19-ring, 20-rotating rod, 21-chuck, 22-clamping rod, 23-spring, 24-protective cover, 25-baffle, 26-oblique plate, 27-support block, 28-fixed block, 29-torsion spring. DETAILED DESCRIPTION

[0035] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] A gas-liquid two-phase flow fire monitoring device for preventing and controlling fire in goaf after water drainage, such as Figure 1-Figure 13 As shown, it includes a mounting block 1, a clamping plate 2, a threaded rod 3, a bidirectional motor 4, a monitoring component and a dilution component. The left and right parts of the mounting block 1 are both slidably connected with the clamping plates 2, and the clamping plates 2 are all arc-shaped, which are convenient for clamping the pipe. The upper sides of the left and right parts of the mounting block 1 are rotatably connected with the threaded rod 3, and the thread directions of the threaded rod 3 are opposite. The upper middle part of the mounting block 1 is connected to the bidirectional motor 4, and the threaded rod 3 is connected to the output shaft of the adjacent bidirectional motor 4. The clamping plates 2 are threadedly connected to the adjacent threaded rod 3. The mounting block 1 is provided with a monitoring component, and the mounting block 1 is also provided with a dilution component.

[0037] like Figure 2 As shown, the monitoring component includes a fire detector 5 and a gas detector 6. The fire detector 5 is connected to the upper rear side of the mounting block 1, and the gas detector 6 is connected to the upper front side of the mounting block 1.

[0038] like Figure 1 and Figure 4 As shown, the dilution assembly includes a first mounting plate 7, a water storage cylinder 8, a nozzle 9 and a water receiving pipe 10. The front and rear parts of the mounting block 1 are connected to the first mounting plate 7, the left and right parts of the first mounting plate 7 are rotatably connected to the water storage cylinder 8, the outer side of the water storage cylinder 8 is connected to the nozzle 9, the inner side of the water storage cylinder 8 is connected to the water receiving pipe 10, and the water receiving pipe 10 passes through the mounting block 1.

[0039] When using the present invention, first place the mounting block 1 on the pipe in the goaf, then start the bidirectional motor 4, drive the threaded rod 3 to rotate, so that the clamps 2 are close to each other to clamp the pipe, and then fix the mounting block 1 on the pipe, and monitor whether there is a fire in the goaf through the fire detector 5, and the gas detector 6 detects the concentration of flammable gas in the goaf. When the gas detector 6 detects that the concentration of flammable gas in the goaf is high, water is passed into the water storage cylinder 8 through the water pipe 10, and then the water is sprayed out through the nozzle 9, so that the water mist dilutes and cools the flammable gas, thereby reducing the concentration of flammable gas in the goaf and avoiding potential fire and explosion risks.

[0040] like Figure 1 and Figure 5 As shown, a circulation component is also included, which includes a second mounting plate 11, a connecting plate 12 and a fan 13. The second mounting plates 11 are connected to the left and right sides of the mounting block 1, and the second mounting plates 11 are rotatably connected to the connecting plates 12, and the connecting plates 12 are connected to four fans 13.

[0041] When the air circulation speed in the goaf is slow, the fan 13 on the connecting plate 12 can be started to suck the flammable gas and gather it at the nozzle 9, thereby accelerating the dilution efficiency of the flammable gas and reducing the risk of fire and explosion.

[0042] like Figure 1 and Figure 6 As shown, an adjustment component is also included, which includes an electric push rod 14, a rack 15 and a gear 16. The electric push rod 14 is connected to the upper side of the second mounting plate 11, and the rack 15 is connected to the telescopic end of the electric push rod 14. The front and rear parts of the connecting plate 12 are connected to the gear 16, and the gear 16 is meshed with the adjacent rack 15.

[0043] When the concentration of flammable gas is high in a certain area in the goaf, the electric push rod 14 is started to push the rack 15 to move, so that the rack 15 and the gear 16 are meshed and move, driving the connecting plate 12 to rotate on the second mounting plate 11, so that the fan 13 rotates to align with the area with high concentration of flammable gas, thereby playing a role in adjusting the angle of the fan 13 to speed up the dilution efficiency of the flammable gas.

[0044] like Figure 1 , Figure 7 and Figure 8As shown, a rotating assembly is also included, which includes an oblique push plate 17, a push frame 18, a guide frame 181, a collar 19 and a rotating rod 20. The upper side of the right rack 15 is connected to the oblique push plate 17, and the middle part of the mounting block 1 is connected to two front and rear guide frames 181, and the guide frames 181 are clamped with push frames 18. The upper sides of the left and right parts of the push frame 18 are rotatably connected to the collar 19, and the collar 19 is connected to the rotating rod 20, and the rotating rod 20 is connected to the adjacent water storage cylinder 8.

[0045] When the rack 15 moves, it drives the inclined push plate 17 to move, so that the inclined push plate 17 drives the push frame 18 to move, and the guide frame 181 guides the push frame 18, so that the ring 19 rotates and moves, and then the rotating rod 20 drives the water storage cylinder 8 to rotate and align with the fan 13, thereby adjusting the angle of the water storage cylinder 8 and ensuring that the water storage cylinder 8 is aligned with the fan 13 to dilute the flammable gas.

[0046] like Figure 1 , Fig. 9 , Fig.10 and Fig.11 As shown, a locking assembly is also included, which includes a chuck 21, a locking rod 22 and a spring 23. The chucks 21 are connected to the outside of the water storage cylinder 8, and the left and right sides of the first mounting plate 7 that are away from each other are slidably connected with the locking rods 22. The locking rods 22 are engaged with adjacent chucks 21, and the springs 23 are connected between the locking rods 22 and the connected first mounting plate 7.

[0047] When the water storage cylinder 8 rotates, the chuck 21 is driven to rotate, so that the clamping rod 22 is separated from the chuck 21, and the spring 23 is squeezed and contracted. After the chuck 21 stops rotating, the spring 23 rebounds, so that the clamping rod 22 moves and re-engages with the chuck 21, thereby playing the role of being able to clamp the water storage cylinder 8 and improving the angle adjustment accuracy of the water storage cylinder 8.

[0048] like Figure 1 , Fig.12 and Fig.13 As shown, a protective assembly is also included, which includes a protective cover 24, a baffle 25, an inclined plate 26, a support block 27, a fixed block 28 and a torsion spring 29. The upper sides of the front and rear parts of the fixed block 28 are connected to the protective cover 24, and ventilation slots are opened on the left and right sides of the protective cover 24 to facilitate ventilation. The fire detector 5 and the gas detector 6 are both located inside the adjacent protective cover 24. The protective cover 24 is slidably connected with the baffle 25, and the right side of the protective cover 24 away from each other is slidably connected with the inclined plate 26. The baffles 25 pass through the adjacent inclined plates 26, and the lower part of the inclined plates 26 is clamped with support blocks 27. The right part of the push frame 18 is connected to the fixed block 28, and the fixed block 28 is rotatably connected to the adjacent support block 27. Two front and rear torsion springs 29 are connected between the support block 27 and the connected fixed block 28.

[0049] When the pushing frame 18 moves, it drives the fixed block 28 to move, so that the support block 27 pushes the inclined plate 26 to move under the force of the torsion spring 29, and then the baffle 25 moves upward along the inclined plate 26, so that the ventilation slots on the protective cover 24 are not blocked, and the gas can flow into the protective cover 24. When the inclined plate 26 moves to the limit, the support block 27 rotates to disengage from the inclined plate 26. After the pushing frame 18 is reset, the inclined plate 26 squeezes the support block 27 to rotate, and the inclined plate 26 and the support block 27 are re-engaged through the force of the torsion spring 29, so that the baffle 25 moves downward to reset and close the protective cover 24, thereby protecting the fire detector 5 and the gas detector 6 and preventing the fire detector 5 and the gas detector 6 from moisture and damage.

[0050] Although the present disclosure has been shown and described with reference to specific exemplary embodiments of the present disclosure, it should be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-mentioned embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

Claims

1. A gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage, characterized in that: The invention comprises a mounting block (1), a clamping plate (2), a threaded rod (3), a bidirectional motor (4), a monitoring component and a dilution component. The left and right parts of the mounting block (1) are both slidably connected to the clamping plates (2). The upper sides of the left and right parts of the mounting block (1) are both rotatably connected to the threaded rods (3). The threaded directions of the threaded rods (3) are opposite. The upper side of the middle part of the mounting block (1) is connected to the bidirectional motor (4). The threaded rods (3) are all connected to the output shafts of the adjacent bidirectional motors (4). The clamping plates (2) are all threadedly connected to the adjacent threaded rods (3). The mounting block (1) is provided with a monitoring component capable of monitoring the fire situation in the goaf. The mounting block (1) is also provided with a dilution component capable of diluting flammable gas.

2. A gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage as claimed in claim 1, characterized in that: The clamping plates (2) are all arc-shaped.

3. A gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage as claimed in claim 1, characterized in that: The monitoring component comprises a fire detector (5) and a gas detector (6); the fire detector (5) is connected to the upper rear side of the mounting block (1), and the gas detector (6) is connected to the upper front side of the mounting block (1).

4. A gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage as claimed in claim 3, characterized in that: The dilution assembly comprises a first mounting plate (7), a water storage cylinder (8), a nozzle (9) and a water receiving pipe (10). The front and rear parts of the mounting block (1) are both connected to the first mounting plate (7), the left and right parts of the first mounting plate (7) are both rotatably connected to the water storage cylinder (8), the outer side of the water storage cylinder (8) is connected to the nozzle (9), the inner side of the water storage cylinder (8) is connected to the water receiving pipe (10), and the water receiving pipe (10) passes through the mounting block (1). When the gas detector (6) detects that the concentration of flammable gas in the goaf is high, water is passed into the water storage cylinder (8) through the water receiving pipe (10), and then the water is sprayed out in atomized form through the nozzle (9), so that the water mist dilutes and cools the flammable gas.

5. A gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage as claimed in claim 4, characterized in that: The invention also comprises a circulation component, which comprises a second mounting plate (11), a connecting plate (12) and a fan (13). The second mounting plates (11) are connected to both left and right sides of the mounting block (1). The second mounting plates (11) are rotatably connected to the connecting plates (12). The connecting plates (12) are connected to a plurality of fans (13). When the fans (13) on the connecting plates (12) are started, the flammable gas is sucked in and gathered at the nozzle (9).

6. A gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage as claimed in claim 5, characterized in that: The utility model also comprises an adjustment component, which comprises an electric push rod (14), a rack (15) and a gear (16). The upper side of the second mounting plate (11) is connected to the electric push rod (14), the telescopic end of the electric push rod (14) is connected to the gear (15), the front and rear parts of the connecting plate (12) are connected to the gear (16), and the gear (16) is meshed with the adjacent rack (15). When the concentration of flammable gas in a certain area in the goaf is high, the electric push rod (14) is started to push the rack (15) to move, so that the rack (15) and the gear (16) mesh and move, and drive the connecting plate (12) to rotate on the second mounting plate (11), so that the fan (13) rotates to align with the area with high concentration of flammable gas.

7. A gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage as claimed in claim 6, characterized in that: The invention also comprises a rotating assembly, which comprises an oblique push plate (17), a push frame (18), a guide frame (181), a collar (19) and a rotating rod (20). The upper side of the right rack (15) is connected to the oblique push plate (17). The middle part of the mounting block (1) is connected to two front and rear guide frames (181). The guide frames (181) are clamped with the push frames (18). The upper sides of the left and right parts of the push frames (18) are rotatably connected to the collars (19). ), the sleeve ring (19) is connected with a rotating rod (20), and the rotating rod (20) is connected to the adjacent water storage cylinder (8). When the rack (15) moves, the inclined push plate (17) is driven to move, so that the inclined push plate (17) drives the push frame (18) to move, and the guide frame (181) guides the push frame (18), so that the sleeve ring (19) rotates and moves, and then the rotating rod (20) drives the water storage cylinder (8) to rotate and align with the fan (13).

8. A gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage as claimed in claim 7, characterized in that: The invention also comprises a clamping assembly, which comprises a clamping disc (21), a clamping rod (22) and a spring (23). The outer side of the water storage cylinder (8) is connected to the clamping disc (21). The left and right sides of the first mounting plate (7) are slidably connected to the clamping rod (22). The clamping rod (22) is clamped and matched with the adjacent clamping disc (21). The spring (23) is connected between the clamping rod (22) and the connected first mounting plate (7). When the water storage cylinder (8) rotates, the clamping disc (21) is driven to rotate, so that the clamping rod (22) is separated from the clamping disc (21), and the spring (23) is squeezed and contracted. After the clamping disc (21) stops rotating, the spring (23) rebounds, so that the clamping rod (22) moves and is clamped and matched with the clamping disc (21) again.

9. A gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage as claimed in claim 8, characterized in that: The invention also comprises a protection assembly, which comprises a protection cover (24), a baffle (25), an inclined plate (26), a support block (27), a fixed block (28) and a torsion spring (29). The upper sides of the front and rear parts of the fixed block (28) are connected to the protection cover (24). The fire detector (5) and the gas detector (6) are both located inside the adjacent protection cover (24). The baffle (25) is slidably connected to the protection cover (24). The right side of the protection cover (24) away from each other is slidably connected to the inclined plate (26). The baffle (25) passes through the adjacent inclined plate (26). The lower part of the inclined plate (26) is clamped with a support block (27). The right part of the push frame (18) is connected to the fixed block (28). The fixed block (28) is connected to the adjacent support block (29). 7) Rotational connection, the support block (27) is connected to the fixed block (28) with two front and rear torsion springs (29), and the push frame (18) moves while driving the fixed block (28) to move, so that the support block (27) pushes the inclined plate (26) to move under the action of the torsion spring (29), and then the baffle (25) moves upward along the inclined plate (26), so that the protective cover (24) is no longer sealed, and the gas can flow into the protective cover (24); when the inclined plate (26) moves to the limit, the support block (27) rotates to separate from the inclined plate (26), and after the push frame (18) is reset, the inclined plate (26) squeezes the support block (27) to rotate, and the inclined plate (26) and the support block (27) are re-engaged and matched through the action of the torsion spring (29).

10. A gas-liquid two-phase flow fire monitoring device for preventing and controlling goaf fire after drainage as claimed in claim 9, characterized in that: The left and right sides of the protective cover (24) are both provided with ventilation slots.

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