A hydrogen sulfide collecting device in tunnel surrounding rock

Abstract

A kind of collection device of hydrogen sulfide in tunnel surrounding rock, including gas collection component, plugging component, air extraction component and support component, the support plate of plugging component is horizontally fixedly connected on the mounting plate of support component, the air exchange bag of gas collection component is set on the top wheel of plugging component, air extraction component is communicated with the air pump of gas collection component, air extraction component is fixedly installed below mounting plate, by the way of positive pressure air exchange, using the cooperation of plugging component and gas collection component, hydrogen sulfide outlet gap is firmly plugged, simultaneously by air pump, air exchange in gap is continuously carried out, hydrogen sulfide gas in gap is replaced into gas collection tank, simultaneously by air extraction component, hydrogen sulfide gas that has been discharged into tunnel is also replaced into gas collection tank, and using the universal wheel and rotation axis rotation of support component, hydrogen sulfide gas collection can be carried out to any air outlet point in tunnel, construction cycle is shortened, and work efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tunnel construction equipment, in particular to a tunnel surrounding rock hydrogen sulfide collection device. BACKGROUND

[0002] The hydrogen sulfide tunnel construction air purification device provided in the publication CN202410634205.9 comprises a mobile base, a support is fixed at the top of the first communication pipeline, and a pair of adjusting and impurity cleaning mechanisms are fixed on the support. The hydrogen sulfide tunnel construction air purification device is characterized in that: the hydrogen sulfide gas first enters the first liquid storage tank, the sodium hydroxide solution in the first liquid storage tank can absorb the hydrogen sulfide gas once, and then the hydrogen sulfide gas enters the second liquid storage tank, and the sodium hydroxide solution in the second liquid storage tank can absorb the hydrogen sulfide gas twice.

[0003] The above-mentioned prior art realizes the collection of hydrogen sulfide gas, but the negative pressure air suction structure used by it is easy to damage the gap structure of the surrounding rock inner wall, resulting in continuous release of hydrogen sulfide gas, and the collection efficiency of the hydrogen sulfide gas that has been discharged is not high. This way delays the construction period and reduces the work efficiency. SUMMARY

[0004] The purpose of the present application is to provide a tunnel surrounding rock hydrogen sulfide collection device to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A tunnel surrounding rock hydrogen sulfide collection device comprises a gas collection assembly, a plugging assembly, a gas extraction assembly and a bracket assembly. The support plate of the plugging assembly is horizontally fixedly connected to the mounting plate of the bracket assembly. The gas exchange bag of the gas collection assembly is arranged on the top wheel of the plugging assembly. The gas extraction assembly is in communication with the gas pump of the gas collection assembly, and the gas extraction assembly is fixedly installed below the mounting plate.

[0007] Preferably, the gas exchange bag comprises a transverse diaphragm connecting two parallel inflatable hoses. The diaphragm, the two inflatable hoses and the working surface form a gas exchange cavity. The first end of the gas exchange bag is blocked by a partition to ensure that the gas exchange cavity does not form an opening at the first end. The gas inlet pipe is fixedly connected to the upper side of the diaphragm and the first end thereof is in communication with the gas outlet of the gas pump. The holes of the gas inlet pipe are uniformly arranged on the gas inlet pipe and are perpendicular to the diaphragm. The tail end of the gas exchange bag and the gas inlet pipe is wound on the convolution wheel. The gas inlet of the gas collection tank is in communication with the diaphragm. The filter screen for filtering and absorbing hydrogen sulfide gas is fixed in the gas collection tank.

[0008] Preferably, the plugging assembly comprises a support plate, a top wheel, a telescopic rod I, a mounting seat II, a sliding plate, a chain wheel, a chain, a spring, a telescopic rod III, a telescopic rod IV and an extrusion plate, the telescopic rod I is vertically fixed on the upper side of the support plate, the mounting seat II is fixedly installed at the top end of the telescopic rod I, the top wheel is rotatably installed on the mounting seat II, the sliding plate is slidably installed on the lower side of the support plate, the chain wheel is installed at the end of the sliding plate extending out of the support plate and is fixedly connected to the piston rod part of the telescopic rod III through a protruding block, one end of the chain is fixed on the support plate and the other end is connected to the spring connecting plate through the chain wheel, the chain link is fixedly installed with the telescopic rod I, the telescopic rod I is installed on the mounting seat II and the top wheel in the same way, the piston rod part of the telescopic rod III is fixedly installed with the telescopic rod IV, and the top part of the telescopic rod IV is fixedly provided with the extrusion plate.

[0009] Preferably, the telescopic rod III is fixed with the plugging assembly on the left and right sides in a symmetrical manner, and the two inflatable hoses are arranged on the top wheels of the two plugging assemblies.

[0010] Preferably, the air extraction assembly comprises a support, a rack, a gear I, a moving seat, a motor I, a gear II, a gear III, a motor II, a rotary joint, an air suction pipe and a through hole, the end of the support is fixedly connected with the rack, the gear I is rotatably installed on the moving seat, the rack is slidably connected with the moving seat, the motor I is fixedly installed on the side of the moving seat to provide power for the gear I, the moving seat is internally provided with a through hole, the horizontal port of the through hole is connected with the air inlet of the air pump through a pipeline, the vertical port is connected with the rotary joint, the end of the rotary joint is fixedly connected with the air suction pipe, the gear II is fixedly installed on the outer cylindrical side of the rotary joint, the gear III is engaged with the gear II, the shaft of the motor II is fixedly connected with the gear III to provide power for the gear III, and the air suction pipe is uniformly provided with through holes and the axis of the air suction pipe is a broken line.

[0011] Preferably, the support assembly comprises a mounting plate, a base, a gear IV, a gear V, a motor III, a telescopic rod V, a universal wheel and a rotating shaft, the mounting plate is rotatably installed on the base through the rotating shaft, the gear IV is fixedly connected with the rotating shaft, the motor III is fixedly connected with the base and the shaft of the motor III is fixedly connected with the gear V, the gear V is engaged with the gear IV, and the two telescopic rods V are vertically parallel, one end of each of the two telescopic rods V is fixedly connected with the base and the other end is connected with the universal wheel.

[0012] Preferably, the cylinder body end and the piston rod end of the telescopic rod III are respectively connected with one support assembly, the two ends of the telescopic rod III are vertically connected with the mounting plates of the support assemblies, the convolution wheel is rotatably installed on the mounting seat I, the mounting seat I is fixedly connected with the mounting plate at the piston rod end of the telescopic rod III, the air pump and the air collecting box are fixedly installed on the mounting plate at the cylinder body end of the telescopic rod III, and the two support plates are vertically fixed on the mounting plate at the cylinder body end of the telescopic rod III.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] The application uses the cooperation of the plugging assembly and the gas collecting assembly in the way of positive pressure ventilation to tightly plug the hydrogen sulfide outlet gap, and constantly ventilates the gap by the air pump to displace the hydrogen sulfide gas in the gap into the gas collecting tank, and also displaces the hydrogen sulfide gas discharged into the tunnel into the gas collecting tank by the air extraction assembly, and the universal wheel and rotating shaft of the support assembly can collect hydrogen sulfide gas at any gas outlet point in the tunnel, thereby shortening the construction period and improving the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the application;

[0016] Figure 2 It is a sectional schematic diagram of the application;

[0017] Figure 3 It is a three-dimensional schematic diagram of the gas collecting assembly of the application;

[0018] Figure 4 It is a sectional schematic diagram of the air ventilation bag of the application;

[0019] Figure 5 It is a sectional schematic diagram of the gas collecting tank of the application;

[0020] Figure 6 It is a three-dimensional schematic diagram of the plugging assembly of the application;

[0021] Figure 7 It is a three-dimensional schematic diagram of the air extraction assembly of the application;

[0022] Figure 8 It is a sectional schematic diagram of the air extraction assembly of the application;

[0023] Figure 9 It is a three-dimensional schematic diagram of the support assembly of the application.

[0024] In the figure: 1 gas collecting assembly, 11 air bag, 111 diaphragm, 112 hose, 12 air pump, 13 gas collecting tank, 15 convolution wheel, 16 air inlet pipe, 17 filter screen, 18 mounting seat I, 2 plugging assembly, 21 support plate, 22 top wheel, 23 telescopic rod I, 24 mounting seat II, 25 sliding plate, 26 chain wheel, 27 chain, 28 spring, 29 telescopic rod III, 210 telescopic rod IV, 211 extrusion plate, 3 air extraction assembly, 31 support, 32 rack, 33 gear I, 34 moving seat, 35 motor I, 36 gear II, 37 gear III, 38 motor II, 39 rotating joint, 310 air suction pipe, 311 through hole, 4 support assembly, 41 mounting plate, 42 base, 48 rotating shaft, 43 gear IV, 44 gear V, 45 motor III, 46 telescopic rod V, 47 universal wheel. DETAILED DESCRIPTION

[0025] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0026] Embodiments

[0027] Please refer to Figures 1 to 9 The present application provides a technical solution:

[0028] A tunnel surrounding rock hydrogen sulfide collection device, including gas collection assembly 1, plugging assembly 2, exhaust assembly 3 and support assembly 4, the support plate 21 of plugging assembly 2 is horizontally fixedly connected on the mounting plate 41 of support assembly 4, as shown in Figure 1 And 2 The gas collection assembly 1 is set on the top wheel 22 of plugging assembly 2, plugging assembly 2 provides support for gas collection assembly 1, and the air bag 11 is tightly pressed on the working face, the exhaust assembly 3 is communicated with the air pump 12 of gas collection assembly 1, the exhaust assembly 3 provides air for gas collection assembly 1, and the hydrogen sulfide gas leaked in the internal belt can be further sucked into gas collection assembly 1, so that the hydrogen sulfide gas in the tunnel is purified, and the exhaust assembly 3 is fixedly installed below the mounting plate 41.

[0029] As a preferred embodiment, the gas collection assembly 1 includes an air bag 11, a diaphragm 111, a hose 112, an air pump 12, a gas collection box 13, a convolution wheel 15, an air inlet pipe 16, a filter screen 17 and a mounting seat I 18, the air bag 11 is a transverse diaphragm 111 connected with two parallel inflatable hoses 112, as shown in Figure 4 The diaphragm 111, the two inflatable hoses 112 and the working face form an air exchange cavity, the inflatable hose 112 is a flexible material and can adapt to the uneven surface of the surrounding rock after inflation, the air bag 11 has a baffle at the first end to ensure that the air exchange cavity does not form an opening at the first end, the baffle blocks the opening above the inflatable hose 112 and the diaphragm 111, and the baffle has an opening through which only the air inlet pipe 16 can pass, and a seal is provided at the connection between the opening and the air inlet pipe 16, as shown in Figure 3As shown, the air inlet pipe 16 is fixedly connected to the upper side of the diaphragm 111 and the first end thereof is in communication with the air outlet of the air pump 12. The air inlet pipe 16 is uniformly provided with openings perpendicular to the diaphragm 111, so as to facilitate the air flow to be quickly blown to the hydrogen sulfide outlet gap. The air inlet pipe 16 and the tail end of the air bag 11 are wound on the convolution wheel 15. The inflation hose 112 is blocked at the end of the convolution wheel 15. The convolution wheel 15 is internally provided with a spring to automatically rotate and contract. When the air bag 11 needs to be unwound from the convolution wheel 15, the telescopic rod III 29 is elongated, and the air bag 11 is unwound from the convolution wheel 15 under the action of tension. At the same time, the spring inside the convolution wheel 15 is energized. When the telescopic rod III 29 is retracted, the spring inside the convolution wheel 15 is de-energized, and the excess air bag 11 is wound on the convolution wheel 15 again. The air inlet of the gas collecting box 13 is in communication with the diaphragm 111. The tail end of the gas collecting box 13 is provided with an opening for discharging excess gas. When the air pump 12 inflates the air cavity, the internal mixed air will flow to the outside through the only outlet of the gas collecting box 13. The gas collecting box 13 is internally fixed with a filter screen 17 for filtering and absorbing hydrogen sulfide gas. As shown, Figure 5 As shown, the gas collecting box 13 adopts a multi-stage filtering mode to collect hydrogen sulfide gas in the air and discharge other gases to the tunnel again.

[0030] As a preferred embodiment, the hose 112 is a self-inflating hose.

[0031] As a preferred embodiment, the blocking assembly 2 comprises a support plate 21, a top wheel 22, a telescopic rod I 23, a mounting seat II 24, a sliding plate 25, a chain wheel 26, a chain 27, a spring 28, a telescopic rod III 29, a telescopic rod IV 210 and a pressing plate 211. The telescopic rod I 23 is vertically fixed on the upper side of the support plate 21, as shown, Figure 6As shown, the telescopic rods 123 are closely arranged to make the ventilation bag 11 fully adhere to the tunnel surrounding rock. The top ends of the telescopic rods 123 are fixedly installed on the mounting seats 124, and the top wheels 22 are rotatably installed on the mounting seats 124. The top wheels 22 have grooves for limiting the ventilation bag 11. The sliding plate 25 is slidably installed on the lower side of the support plate 21. The sliding plate 25 extends out of the end of the support plate 21 and is fixedly connected to the piston rod of the telescopic rod 129 through a chain wheel 26. When the telescopic rod 129 is extended or shortened, the sliding plate 25 can move along the axial direction of the telescopic rod 129. One end of a chain 27 is fixedly connected to the support plate 21, and the other end of the chain 27 is connected to a mounting plate 41 through the chain wheel 26 and a spring 28. When the telescopic rod 129 is extended, the spring 28 is energized. When the telescopic rod 129 is retracted, the spring 28 pulls the chain 27 to recover. The chain links of the chain 27 are fixedly connected to the telescopic rods 123. When the telescopic rod 129 is extended or retracted, the telescopic rods 123 on the chain 27 can be unfolded or folded. The telescopic rods 123 are fixedly connected to the mounting seats 124 and the top wheels 22 in the same way. The piston rod of the telescopic rod 129 is fixedly connected to a telescopic rod 210. The top of the telescopic rod 210 is fixedly connected to an extrusion plate 211. The extrusion plate 211 extrudes the diaphragm 111 to block the ventilation cavity winding wheel 15 on the top of the ventilation bag 11.

[0032] As a preferred embodiment, the telescopic rod 129 is symmetrically fixed with the blocking assembly 2 on the left and right sides. The two inflatable hoses 112 are respectively arranged on the top wheels 22 of the two blocking assemblies 2.

[0033] As a preferred embodiment, the width of the extrusion plate 211 is less than the distance between the two rows of mounting seats 124.

[0034] As a preferred embodiment, the telescopic rod 123 is not limited to a hydraulic cylinder, a pneumatic cylinder, or other linear components that can realize linear control movement.

[0035] As a preferred embodiment, the air suction assembly 3 includes a bracket 31, a rack 32, a gear 133, a moving seat 34, a motor 135, a gear 136, a gear 137, a motor 138, a rotary joint 39, an air suction pipe 310, and a through hole 311. The end of the bracket 31 is fixedly connected to the rack 32. The rack 32 is in a straight line with the bracket 31. The gear 133 is rotatably installed on the moving seat 34. The gear 133 is meshed with the rack 32. The moving seat 34 is rotatably installed on the bracket 31. The motor 135 is fixedly connected to the moving seat 34. The gear 136 is rotatably installed on the moving seat 34. The gear 136 is meshed with the gear 133. The gear 137 is rotatably installed on the moving seat 34. The gear 137 is meshed with the gear 136. The motor 138 is fixedly connected to the moving seat 34. The rotary joint 39 is rotatably installed on the moving seat 34. The air suction pipe 310 is fixedly connected to the rotary joint 39. The through hole 311 is formed in the air suction pipe 310. Figure 7As shown, rack 32 is in sliding connection with moving seat 34, motor I 35 is fixedly installed on the side of moving seat 34 to provide power for gear I 33, motor I 35 drives gear I 33 to rotate to drive moving seat 34 to reciprocate linearly on rack 32, moving seat 34 has a turning through hole 311, the horizontal port of through hole 311 is connected with the air inlet of air pump 12 through a pipeline, the vertical port is connected with rotary joint 39, the end of rotary joint 39 is fixedly connected with suction pipe 310, gear II 36 is fixedly installed on the outer cylindrical side of rotary joint 39, gear III 37 is engaged with gear II 36, motor II 38 is fixedly connected with gear III 37 to provide power for gear III 37, as shown in Figure 8 As shown, so that suction pipe 310 rotates continuously, through holes are uniformly arranged on suction pipe 310 and the axis of suction pipe 310 is a broken line, so that air and hydrogen sulfide in the tunnel can be absorbed by air suction assembly 3 in the maximum range.

[0036] As a preferred embodiment, mounting plate 41 is rotatably installed on base 42 through rotating shaft 48, gear IV 43 is fixedly connected on rotating shaft 48, as shown in Figure 9 As shown, motor III 45 is fixedly connected on base 42 and gear V 44 is fixedly connected on the shaft of motor III 45, gear V 44 is engaged with gear IV 43, motor III 45 can control the rotating direction of mounting plate 41, so that the whole mechanism can not only collect hydrogen sulfide gas cracks on the wall top of surrounding rock, but also collect gas cracks in the direction of working face and other corners, two telescopic rods V 46 are vertically parallel and one end is fixedly connected with base 42 and the other end is connected with universal wheel 47, telescopic rod V 46 can adjust the height of the whole device to fit more use scenarios.

[0037] As a preferred embodiment, telescopic rod V 46 is not only limited to linear motion devices such as hydraulic rods and air cylinders, but also can be other height control parts such as scissor type lifting frames.

[0038] As a preferred embodiment, the cylinder end and piston rod end of telescopic rod III 29 are respectively connected with a support assembly 4, both ends of telescopic rod III 29 are vertically connected with the mounting plate 41 of the support assembly 4, convolution wheel 15 is rotatably installed on mounting seat I 18, mounting seat I 18 is fixedly connected on the mounting plate 41 of the piston rod end of telescopic rod III 29, air pump 12 and gas collecting box 13 are fixedly installed on the mounting plate 41 of the cylinder end of telescopic rod III 29, two support plates 21 are vertically fixed on the mounting plate 41 of the cylinder end of telescopic rod III 29.

[0039] The working principle of the present application: when there is a hydrogen sulfide gas fracture on the tunnel surrounding rock, the present application is moved to the fracture mouth, the telescopic rod V 146 is adjusted to make the gas collection assembly 1, the plugging assembly 2 and the air extraction assembly 3 reach the appropriate height, the motor III 45 is adjusted to make each assembly reach the angle towards the fracture, then the telescopic rod I 23 of the plugging assembly 2 is adjusted, the hose 112 is inflated, the hose 112 is fully attached to the tunnel surrounding rock, when the fracture is relatively long, the telescopic rod III 29 is elongated, at this time the telescopic rod I 23 on the chain 27 will be turned up to the side of the supporting plate 21, the number of telescopic rod I 23 on the upper side is increased, more air exchange bags 11 are pulled out from the convolution wheel 15, thereby increasing the working interval of the air exchange cavity, the telescopic rod IV 210 is elongated to press the diaphragm 111 tightly, the air pump 12 extracts air from the air extraction assembly 3, the motor I 135 and the motor II 138 work to drive the air suction pipe 310 to rotate and reciprocate, the extracted air is blown to the fracture through the air inlet pipe 16, the hydrogen sulfide escaped from the tunnel air will also be absorbed into the air exchange cavity again, the hydrogen sulfide gas in the fracture is exchanged out, the mixed hydrogen sulfide air flows to the gas collection tank 13, after the hydrogen sulfide is absorbed by the filter screen 17, the remaining air returns to the tunnel through the tail opening of the gas collection tank 13, and the task is completed. After that, it can be restored to the initial state for withdrawal.

[0040] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A device for collecting hydrogen sulfide in the surrounding rock of a tunnel, comprising a gas collecting assembly (1), a plugging assembly (2), a gas pumping assembly (3) and a support assembly (4), characterized in that: The support plate (21) of the blocking assembly (2) is horizontally fixedly connected to the mounting plate (41) of the support assembly (4), the top wheel (22) of the blocking assembly (2) is arranged on the gas collecting assembly (1), the air pumping assembly (3) is communicated with the air pump (12) of the gas collecting assembly (1), and the air pumping assembly (3) is fixedly installed below the mounting plate (41); The gas collecting assembly (1) comprises a gas exchanging bag (11), a diaphragm (111), an air charging hose (112), an air pump (12), a gas collecting box (13), a convolution wheel (15), an air inlet pipe (16), a filter screen (17) and a mounting seat I (18), the gas exchanging bag (11) is structured by a transverse diaphragm (111) connected to two parallel air charging hoses (112), the diaphragm (111), the two air charging hoses (112) and a working surface form a gas exchanging cavity, the gas exchanging bag (11) has a baffle at a first end to ensure that the gas exchanging cavity is not open at the first end, the air inlet pipe (16) is fixedly connected to the upper side of the diaphragm (111) and communicated with the air outlet of the air pump (12) at the first end, the air inlet pipe (16) is uniformly provided with holes with an opening direction perpendicular to the diaphragm (111), the gas exchanging bag (11) and the air inlet pipe (16) are wound on the convolution wheel (15) at tail ends, and the air inlet of the gas collecting box (13) is communicated with the diaphragm (111), and the filter screen (17) for filtering and absorbing hydrogen sulfide gas is fixedly arranged in the gas collecting box (13); The blocking assembly (2) comprises a support plate (21), a top wheel (22), an extension rod I (23), a mounting seat II (24), a sliding plate (25), a chain wheel (26), a chain (27), a spring (28), an extension rod III (29), an extension rod IV (210) and an extrusion plate (211), the extension rod I (23) is fixedly arranged on the upper side of the support plate (21), the mounting seat II (24) is fixedly arranged at the top end of the extension rod I (23), the top wheel (22) is rotatably arranged on the mounting seat II (24), the sliding plate (25) is slidably arranged on the lower side of the support plate (21), the chain wheel (26) is arranged on the end of the support plate (21) and fixedly connected to the piston rod of the extension rod III (29) through a protruding block, one end of the chain (27) is fixedly arranged on the support plate (21), the other end of the chain (27) is wound around the chain wheel (26) and connected to the mounting plate (41) through the spring (28), the chain link of the chain (27) is fixedly arranged with the extension rod I (23), the piston rod of the extension rod III (29) is fixedly arranged with the extension rod IV (210), and the top of the extension rod IV (210) is fixedly arranged with the extrusion plate (211).

2. The device for collecting hydrogen sulfide in the surrounding rock of a tunnel according to claim 1, characterized in that: The extension rod III (29) is fixedly arranged with the blocking assembly (2) on the left side and the right side, respectively, and the two extension rods III (29) are fixedly arranged with the blocking assembly (2) on the left side and the right side, respectively.

3. A device for collecting hydrogen sulfide in the surrounding rock of a tunnel according to claim 2, characterized in that: The air extraction assembly (3) comprises a bracket (31), a rack (32), a gear I (33), a moving seat (34), a motor I (35), a gear II (36), a gear III (37), a motor II (38), a rotary joint (39), an air suction pipe (310) and a through hole (311), the bracket (31) is fixedly connected with the rack (32) at one end, the gear I (33) is rotatably installed on the moving seat (34), the rack (32) is slidably connected with the moving seat (34), the motor I (35) is fixedly installed on the side of the moving seat (34) to provide power for the gear I (33), the moving seat (34) has a through hole (311) inside, the horizontal port of the through hole (311) is connected with the air inlet of the air pump (12) through a pipeline, and the vertical port is connected with the rotary joint (39), the rotary joint (39) is fixedly connected with the air suction pipe (310) at one end, the gear II (36) is fixedly installed on the outer cylindrical side of the rotary joint (39), the gear III (37) is engaged with the gear II (36), the motor II (38) is fixedly connected with the gear III (37) to provide power for the gear III (37), and the air suction pipe (310) is uniformly provided with through holes and the axis of the air suction pipe (310) is a broken line.

4. The device for collecting hydrogen sulfide in the surrounding rock of a tunnel according to claim 3, characterized in that: The bracket assembly (4) comprises a mounting plate (41), a base (42), a gear IV (43), a gear V (44), a motor III (45), a telescopic rod V (46), a universal wheel (47) and a rotating shaft (48), the mounting plate (41) is rotatably installed on the base (42) through the rotating shaft (48), the gear IV (43) is fixedly connected with the rotating shaft (48), the motor III (45) is fixedly connected with the base (42), and the shaft of the motor III (45) is fixedly connected with the gear V (44), the gear V (44) is engaged with the gear IV (43), and the two telescopic rods V (46) are vertically parallel, one end of each telescopic rod V (46) is fixedly connected with the base (42), and the other end is connected with the universal wheel (47).

5. A device for collecting hydrogen sulfide in the surrounding rock of a tunnel according to claim 4, characterized in that: The cylinder end and the piston rod end of the telescopic rod III (29) are connected with one bracket assembly (4) respectively, the two ends of the telescopic rod III (29) are vertically connected with the mounting plate (41) of the bracket assembly (4), the convolution wheel (15) is rotatably installed on the mounting seat I (18), the mounting seat I (18) is fixedly connected with the mounting plate (41) at the piston rod end of the telescopic rod III (29), the air pump (12) and the air collecting box (13) are fixedly installed on the mounting plate (41) at the cylinder end of the telescopic rod III (29), and the two supporting plates (21) are vertically fixed on the mounting plate (41) at the cylinder end of the telescopic rod III (29).

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