Tunnel cleaning machine

Abstract

This invention provides a tunnel cleaning machine, including a frame, a cleaning mechanism, a recovery device, and a moving device. The cleaning mechanism includes a cleaning unit, an air compression mechanism, and a liquid carbon dioxide storage tank. The cleaning unit is connected to the recovery device, the air compression mechanism, and the liquid carbon dioxide storage tank. This invention achieves all-around cleaning of the tunnel through the longitudinal, lateral, and left-right movement of the nozzles. It features fast cleaning speed, high cleanliness, and high work efficiency. By adjusting the height of the first wheel, the first wheel of the cleaning machine is positioned on the road surface, while the second wheel is on the road shoulder, reducing road occupation and lowering the risk of traffic accidents. The negative pressure principle is used to instantly recover dirt and carbon dioxide formed by the vaporization of dry ice after tunnel cleaning, reducing secondary operations and thus lowering operating costs. Moreover, tunnel cleaning and material recovery are carried out simultaneously, resulting in high work efficiency and reduced operating costs.

Description

Technical Field

[0001] The invention relates to the field of tunnel cleaning, and in particular to a tunnel cleaning machine. Background Art

[0002] Usually, the cleaning of a tunnel will temporarily close the passage of a single tunnel, causing the passage pressure of another tunnel to increase, seriously affecting the passage efficiency of the tunnel. At present, some long and large tunnels in China carry out cleaning work regularly. The main cleaning methods are: manual cleaning method, roller brush chemical cleaning method, high-pressure water jet cleaning method, etc. In the manual cleaning method, the cleaning personnel use chemical agents to clean the tunnel civil structure, electromechanical equipment and decoration. This cleaning method is not only labor-intensive, but also has low cleaning efficiency, poor cleaning quality and great environmental pollution. In addition, the chemical agents have a great harm to the health of the cleaning personnel. The roller brush cleaning method mainly uses machines instead of manual chemical agents to clean the tunnel. This method effectively improves the cleaning efficiency, but due to the existence of cleaning dead corners, the cleaning quality is poor, and the chemical cleaning agent will cause pollution to the environment when cleaning sewage and wastewater. High-pressure water jet cleaning technology is to pressurize water to tens to thousands of atmospheres through a high-pressure water generator, and then convert the water into a high-speed micro-water jet through a spray device with a fine aperture. The speed of this water jet is generally more than one times the Mach number. This high-energy, high-speed water flow can impact the surface of the object in a positive or tangential direction, and can complete the cleaning and maintenance of the tunnel. However, the water jet has a large amount of energy, and it is easy to damage the cleaning object during the cleaning process. The cleaning medium uses water, and the humidity in the tunnel increases, which is very harmful to the electromechanical equipment.

[0003] A patent document with application number 201210357293.X in China and publication date 2012.12.19 discloses a tunnel dry ice cleaning machine, which includes an engineering vehicle, an air compressor, a liquid carbon dioxide storage tank arranged on the engineering vehicle, a cleaning nozzle machine bogie, a cleaning control display, a control platform and a dry ice cleaning device. The air compressor is rigidly connected to the engineering vehicle through a traction frame; the cleaning control display is installed on the control platform to display the status parameters of the entire equipment; a control system is encapsulated in the control platform, and the entire equipment is controlled by the control system; the dry ice cleaning device includes a dry ice generation pipe, a compressed air pipe and a cleaning nozzle pipe.

[0004] However, the engineering vehicle of the cleaning machine needs to move to the right in the tunnel, so that during cleaning, the nozzle is far away from the tunnel surface and cannot meet the requirements of detailed cleaning; and the multiple nozzle groups of the cleaning machine are respectively arranged on the cleaning nozzle machine bogie. The control system adjusts the angle of the cleaning nozzle machine bogie to keep the cleaning distance between the nozzle on the cleaning nozzle machine bogie and the tunnel surface consistent. This adjustment method has a small adjustable range and can only adjust the lateral distance between the nozzle and the tunnel surface, but cannot adjust the longitudinal height of the nozzle on the cleaning machine. In this way, the high tunnel surface cannot be effectively cleaned and the cleaning effect is poor; then, there is no dirt recovery device on the cleaning machine, and the solid dirt dropped after cleaning and the carbon dioxide generated by the gasification of dry ice cannot be recovered, causing environmental pollution. Summary of the invention

[0005] The invention provides a tunnel cleaning machine which has high cleaning efficiency and reduces environmental pollution during cleaning.

[0006] To achieve the above object, the technical solution of the present invention is: a tunnel cleaning machine, comprising a frame, a cleaning mechanism, a recovery device and a moving device, the cleaning mechanism comprising a cleaning device, an air compression mechanism and a liquid carbon dioxide storage tank, the cleaning device being connected to the recovery device, the air compression mechanism and the liquid carbon dioxide storage tank respectively;

[0007] The cleaning device includes a circulation member, a cleaning moving device, a nozzle and a connecting member, wherein the nozzle is located at one end of the circulation member, the connecting member is located at the other end of the circulation member, the cleaning moving device is connected to the connecting member, the circulation member includes a first channel and a second channel, the second channel is arranged inside the first channel, and the first channel and the second channel are not connected;

[0008] The nozzle includes an injection part connected to the first channel and a recovery part connected to the second channel; the connecting piece includes a first through hole, a second through hole and a third through hole, the first through hole and the second through hole are connected to the first channel, and the third through hole is connected to the second channel;

[0009] The first through hole and the second through hole are symmetrically arranged with respect to the third through hole; the air compression mechanism is connected to the first through hole through a first pipeline, the liquid carbon dioxide storage tank is connected to the second through hole through a second pipeline, and the recovery device is connected to the third through hole through a recovery pipeline;

[0010] The recovery device includes a negative pressure device and a recovery barrel, wherein the negative pressure device is connected to the recovery barrel; the recovery barrel includes a recovery channel and a recovery connection portion, wherein the recovery channel extends from the inner wall of the recovery barrel to the bottom of the recovery barrel; the recovery connection portion extends from the outer wall of the recovery barrel to the outside; the recovery channel is connected to the recovery connection portion, and the recovery connection portion is connected to the recovery pipeline;

[0011] The mobile device includes a first wheel device and a second wheel device, the first wheel device is arranged on one side of the frame, and the second wheel device is arranged on the other side of the frame; the first wheel device includes a first wheel group and a height adjustment device; the first wheel group includes a first wheel and a wheel bearing, the first wheel is connected to the wheel bearing, a bearing connector extends outward from the wheel bearing, the first wheel is connected to the height adjustment device through the bearing connector, and there is a space between the first wheel and the bottom of the frame;

[0012] The height adjustment device comprises a height adjustment mounting bracket, a height adjustment component and a height adjustment drive; the height adjustment component and the height adjustment drive are mounted on the height adjustment mounting bracket, and the height adjustment drive is connected to the height adjustment component.

[0013] The above arrangement is that the first channel and the second channel provided by the circulation member are connected to the first channel through the injection part, the first through hole and the second through hole of the connecting member are connected to the first channel, the air compression mechanism is connected to the first through hole through the first pipe, and the liquid carbon dioxide storage tank is connected to the second through hole through the second pipe, so that the air and carbon dioxide are mixed in the first channel, and the mixed substance is sprayed out through the injection part to achieve the cleaning of the tunnel wall; the recovery part is connected to the second channel, the third through hole of the connecting member is connected to the second channel, and the recovery device is connected to the third through hole through the recovery pipe; in this way, the solid dirt dropped from the wall after cleaning and the carbon dioxide generated by the gasification of dry ice are recovered by the recovery device, so as to reduce the emission of carbon dioxide and avoid environmental pollution; and the second channel is arranged inside the first channel, and the first channel and the second channel are not connected; the first channel and the second channel are independent of each other, and the two pipes will not affect each other during operation, so that the cleaning of the tunnel wall and the recovery of the solid dirt dropped from the wall after cleaning can be carried out simultaneously, the working efficiency is high, and the volume of the cleaning vehicle can be limitedly reduced;

[0014] The recovery channel is connected to the recovery connection part, and the recovery channel is connected to the recovery connection part, so that the negative pressure device recovers the solid dirt dropped from the wall after cleaning and the carbon dioxide generated by the gasification of dry ice into the recovery channel;

[0015] The first wheel is connected to the height adjustment device through a bearing connector, so that the height adjustment device can adjust the longitudinal height of the first wheel on the frame. When the tunnel cleaning machine is working, the up and down height of the first wheel is adjusted according to the height of the tunnel shoulder, so that the wheel on one side of the tunnel cleaning machine is on the road and the wheel on the other side is on the shoulder. Such a tunnel cleaning machine occupies less road area when working, effectively reducing the impact on the tunnel traffic efficiency during cleaning.

[0016] Furthermore, the air compression mechanism includes a compression device and an air storage bottle, the compression device includes an air extraction device, an air extraction drive motor, an air extraction drive flywheel, an air extraction driven flywheel and an air extraction belt; the air extraction drive flywheel is connected to the air extraction drive motor, the air extraction driven flywheel is connected to the air extraction device, the air extraction belt is sleeved between the air extraction drive flywheel and the air extraction driven flywheel, and the air storage bottle is connected to the air extraction device through a pipeline; the air compression mechanism arranged above is small and light in size and has a good air compression effect.

[0017] Furthermore, the negative pressure device includes a negative pressure drive motor, a fan blade and a negative pressure pipe, the negative pressure pipe passes through the wall of the recycling barrel and is fixed on the recycling barrel, the negative pressure drive motor is installed on the frame, the fan blade is connected to the negative pressure drive motor, and the fan blade is located in the negative pressure pipe. With the above arrangement, the fan blade is driven to rotate by the negative pressure drive motor to realize the waste recovery, which is small in size and high in efficiency.

[0018] Furthermore, the cleaning mobile device includes a slide rail rack, a transverse moving mechanism, a longitudinal motor, a nozzle steering motor, and a screw rod. The transverse moving mechanism includes a rack guide, a transverse motor, and a transverse motor bracket. The two ends of the rack guide are connected to the slide rail rack. The transverse motor is installed on the rack guide through the transverse motor bracket. The output end of the transverse motor is connected to the rack guide. One end of the nozzle steering motor is connected to the transverse motor bracket, and the other end is connected to the connecting piece. The above settings realize the longitudinal and transverse movement of the nozzle, which can better clean the tunnel wall. The nozzle can be swung left and right through the nozzle steering motor, making the cleaning more efficient.

[0019] Furthermore, the height adjustment mounting bracket includes an upper support member and a lower support member, a fixing member is connected between the upper support member and the lower support member; an upper connecting hole is provided on the upper support member; a lower connecting hole and a mounting groove are provided on the lower support member, the lower connecting hole is provided on one side of the fixing member, and the mounting groove is provided on the other side of the fixing member;

[0020] The height adjustment assembly includes a height adjustment movable part and a height adjustment connecting part; the height adjustment movable part has a height adjustment connecting rod extending downward, the height adjustment movable part is slidably arranged on the fixed part, the height adjustment connecting part is arranged under the lower support part, the height adjustment connecting rod passes through the lower connecting hole and is connected to the height adjustment connecting part; the height adjustment connecting part is connected to the bearing connecting part.

[0021] In the above arrangement, a height adjustment connecting rod is extended downward through the height adjustment movable part, and the first wheel is connected to the height adjustment connecting part through a bearing connecting part, so that the height adjustment drive can drive the height adjustment movable part. By connecting a fixing part between the upper support part and the lower support part, the upper support part and the lower support part can be connected to fix the upper support part and the lower support part, and the height adjustment movable part can be moved on the fixing part. The height adjustment movable part can drive the first wheel to move up and down in the space between the bottom of the frame and the first wheel along the sliding direction of the fixing part; in this way, the up and down height of the first wheel can be adjusted so that the first wheel and the second wheel are not on the same horizontal plane, while the frame remains in a horizontal state.

[0022] Furthermore, the second wheel device includes a second wheel group and a second wheel group connecting member, the second wheel group connecting member is connected to the second wheel group; the second wheel group includes a second wheel and a wheel frame, the wheel frame includes a first connecting portion, a second connecting portion and a third connecting portion, the first connecting portion and the second connecting portion are symmetrically arranged about the third connecting portion, and the third connecting portion is connected to the second wheel.

[0023] Furthermore, the height adjustment drive includes a height adjustment drive motor and a height adjustment threaded shaft. The height adjustment drive motor is connected to the height adjustment threaded shaft through a coupling; the height adjustment threaded shaft passes through the upper connecting hole and is installed on the mounting groove; the height adjustment movable part is installed on the height adjustment threaded shaft, and the height adjustment drive motor drives the height adjustment movable part to move up and down on the fixed part.

[0024] In the above arrangement, the height adjustment driving motor drives the height adjustment threaded shaft to rotate; the height adjustment threaded shaft is installed on the mounting groove to fix the position of the height adjustment threaded shaft to prevent the height adjustment threaded shaft from moving when it rotates; when the height adjustment driving motor drives the height adjustment threaded shaft to rotate, the height adjustment movable part can be moved up and down through the cooperation between the height adjustment movable part and the height adjustment threaded shaft.

[0025] Furthermore, the second wheel assembly connecting member includes a first connecting member and a second connecting member, one end of the first connecting member is sleeved on the frame, and the other end of the first connecting member is hinged to the first connecting part; one end of the second connecting member is sleeved on the frame, and the other end of the second connecting member is hinged to the first connecting part; the second wheel device also includes a shock absorbing device, one end of the shock absorbing device is hinged to the frame, and the other end of the shock absorbing device is hinged to the first connecting part. In this way, the connecting member drives the second wheel to move up and down along the rotation direction of the connecting member.

[0026] Furthermore, the injection portion of the first channel includes four injection ports arranged in a straight line, so that during cleaning, the pressure of the mixture of air and carbon dioxide increases when passing through the four injection ports arranged in a straight line, effectively enhancing the cleaning ability of the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 Another schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the three-dimensional structure of the cleaning device in the present invention;

[0030] Figure 4 This is a disassembled diagram of the cleaning device in the present invention;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the connection between the nozzle, the connecting member and the spray flow member in the present invention;

[0032] Figure 6 It is a schematic diagram of the three-dimensional structure of the frame and the moving device in the present invention;

[0033] Figure 7 is an exploded view of the first wheel device of the present invention;

[0034] Figure 8 is an exploded view of the second wheel device of the present invention;

[0035] Fig. 9 for Figure 6 Enlarged view of a in the middle;

[0036] Fig.10 for Figure 2 Enlarged view of middle b;

[0037] Fig.11 It is a disassembled diagram of the recovery device in the present invention;

[0038] Fig.12 It is a three-dimensional structural schematic diagram of the air compression mechanism in the present invention;

[0039] Fig.13 It is a schematic diagram of the cross-sectional structure of the connection between the nozzle and the flow member in the present invention. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1-13 As shown, a tunnel cleaning machine includes a frame 4, a cleaning mechanism, a recovery device 3, a moving device 2 and a controller (not shown in the figure); the cleaning mechanism includes a cleaning device 1, an air compression mechanism 5 and a liquid carbon dioxide storage tank 6, and the cleaning device 1 is respectively connected to the recovery device 3, the air compression mechanism 5 and the liquid carbon dioxide storage tank 6; the controller includes a battery and a control chip.

[0042] The cleaning device 1 includes a circulation member 11, a cleaning moving device 12, a nozzle 13 and a connecting member 14. The nozzle 13 is located at one end of the circulation member 11, and the connecting member 14 is located at the other end of the circulation member 11. The cleaning moving device 12 is connected to the connecting member 14. The circulation member 11 includes a first channel and a second channel. The second channel is arranged inside the first channel, and the first channel and the second channel are not connected.

[0043] The nozzle 13 includes an injection part 131 connected to the first channel, a recovery part 132 connected to the second channel, and a recovery through hole 133. The recovery through holes 133 are evenly distributed on the nozzle 13. The recovery through holes 133 are connected to the recovery part 132. In this embodiment, four recovery through holes 133 are provided. This can increase the recovery rate and range. The injection part 131 includes four injection ports arranged in a straight line. In this embodiment, the nozzle 13 is connected to one end of the connector 14 through a connecting seat 130. The connecting seat 130 is provided with an injection part fixing plate 1301. The injection part is fixed on the injection part fixing plate 1301. The connecting seat is provided with a channel connecting the recovery part 132 with the second channel.

[0044] The connecting member 14 includes a first through hole 141, a second through hole 142 and a third through hole 143. The first through hole 141 and the second through hole 142 are connected to the first channel, and the third through hole 143 is connected to the second channel.

[0045] The first through hole 141 and the second through hole 142 are symmetrically arranged about the third through hole 143; the air compression mechanism 5 is connected to the first through hole 141 through a first pipeline, and a second battery valve (not shown in the figure) is provided on the liquid carbon dioxide storage tank 6; the second battery valve is connected to the second through hole 142 through a second pipeline; the recovery device 3 is connected to the third through hole 143 through a recovery pipeline. In this embodiment, the first pipeline, the second pipeline and the recovery pipeline are metal hoses. The first pipeline, the second pipeline and the recovery pipeline are not shown in the figure.

[0046] The first channel and the second channel are arranged through the circulation member, the first channel is communicated with the first channel through the injection part, the first through hole and the second through hole of the connecting member are communicated with the first channel, the air compression mechanism is connected with the first through hole through the first pipe, and the liquid carbon dioxide storage tank is connected with the second through hole through the second pipe, so that the air and carbon dioxide are mixed in the first channel, and the mixed substances are sprayed out through the injection part to achieve the cleaning of the tunnel wall; the second channel is communicated with the second channel through the recovery part, the third through hole of the connecting member is communicated with the second channel, and the recovery device is connected with the third through hole through the recovery pipe; in this way, the solid dirt dropped from the wall after cleaning and the carbon dioxide generated by the gasification of dry ice are absorbed by the recovery device, so as to reduce the emission of carbon dioxide and avoid environmental pollution; and the second channel is arranged inside the first channel, and the first channel and the second channel are not communicated with each other; the first channel and the second channel are independent of each other, and the two pipes will not affect each other during operation, so that the operations of cleaning the tunnel wall and absorbing the solid dirt and carbon dioxide dropped from the wall after cleaning can be carried out simultaneously, which improves the work efficiency and can reduce the volume of the cleaning vehicle to a limited extent.

[0047] The cleaning moving device 12 includes a slide rail frame 121, a transverse moving mechanism, a longitudinal motor 123, a nozzle steering motor 124, and a screw rod 125. The transverse moving mechanism includes a rack guide 1221, a transverse motor 1222, and a transverse motor bracket 1223. Both ends of the rack guide 1221 are connected to the slide rail frame 121; the transverse bracket 1223 is provided with a transverse through hole 1224 matching the width direction of the rack guide 1221, and a gear 1225 matching the rack guide is provided in the transverse through hole 1224; the transverse motor 1222 is installed on the rack guide 1221 through the transverse motor bracket 1223, and the transverse motor 1222 is connected to the rack guide 1221 through the gear 1225. One end of the nozzle steering motor 124 is connected to the transverse motor bracket 1223, and the other end is connected to the connecting piece 14.

[0048] The longitudinal motor 123 is installed on the top of one side of the slide rail frame 121. The longitudinal motor 123 is connected to the screw rod 125, and the screw rod 125 passes through the rack guide rail 1221 to control the lifting of the rack guide rail 1221. The slide rail frame 121 and the connection between the rack guide rail 1221 are respectively provided with guide rails, and the rack guide rail is provided with a T-shaped slot 12211 matching the guide rail.

[0049] By setting the longitudinal motor 123 on the top of the slide rail frame 121, the longitudinal motor 123 drives the rack guide 1221 to move up and down. The rod 125 passes through the rack guide 1221 to control the lifting of the rack guide 1221. By using a T-slot, the rack guide can move stably on the slide rail frame 121.

[0050] The recovery device 3 includes a negative pressure device 31 and a recovery barrel 32, and the negative pressure device 31 is connected to the recovery barrel 32; the negative pressure device 31 includes a negative pressure drive motor 311, a fan blade 312 and a negative pressure pipe 313, and the negative pressure pipe 313 passes through the wall of the recovery barrel 32 and is fixed on the recovery barrel 32, and the negative pressure drive motor 311 is installed on the vehicle frame 4, and the fan blade 312 is connected to the negative pressure drive motor 311, and the fan blade 312 is located in the negative pressure pipe 313. The fan blade is driven to rotate by the negative pressure drive motor to realize the recovery of waste, which has small size and high efficiency.

[0051] The recovery barrel 32 includes a recovery channel 321, a recovery connection part 322 and a recovery barrel cover 333. The recovery channel 321 extends from the inside of the wall surface of the recovery barrel 32 to the bottom of the recovery barrel; the recovery connection part 322 extends from the outside of the wall surface of the recovery barrel 32 to the outside; the recovery channel 321 is connected to the recovery connection part 322, and the recovery connection part 322 is connected to the recovery pipeline. The recovery channel is connected to the recovery connection part, and the recovery channel is connected to the recovery connection part, so that the negative pressure device absorbs the solid dirt dropped from the wall after cleaning and the carbon dioxide generated by the gasification of dry ice into the recovery channel.

[0052] The air compression mechanism 5 includes a compression device 51, a gas storage bottle 52 and a first battery valve 521. The compression device 51 includes an air extraction device 511, an air extraction drive motor 512, an air extraction drive flywheel 513, an air extraction driven flywheel 514 and an air extraction belt 515. The air extraction drive flywheel 513 is connected to the air extraction drive motor 512, the air extraction driven flywheel 514 is connected to the air extraction device 511, and the air extraction belt sleeve 515 is connected between the air extraction drive flywheel 513 and the air extraction driven flywheel 514. One end of the gas storage bottle 52 is connected to the air extraction device through a pipeline, and the gas storage bottle 52 is connected to the first battery valve 521, and the first battery valve 521 is connected to the first through hole through a first pipeline. The air compression mechanism configured in this way is compact and light, and has a good air compression effect.

[0053] like Figure 2 As shown in Figures 6-10, the mobile device 2 includes a first wheel device 21 and a second wheel device 22, the first wheel device 21 is arranged on one side of the frame 4, and the second wheel device 22 is arranged on the other side of the frame 4; in this embodiment, the first wheel device 21 and the second wheel device 22 are arranged in two groups, one group of the first wheel device 21 and the second wheel is located at the front end of the frame 4, and the other group of the first wheel device 21 and the second wheel is located at the rear end of the frame 4.

[0054] The first wheel device 21 includes a first wheel group 211 and a height adjustment device 212; the first wheel group 211 includes a first wheel 2111 and a wheel bearing 2112, the first wheel 2111 is connected to the wheel bearing 2112, the wheel bearing 2112 has a bearing connector 2113 extending outward, and the first wheel 2111 is connected to the height adjustment device 212 via the bearing connector 2113.

[0055] The height adjustment device 212 includes a height adjustment mounting bracket 213 , a height adjustment component 214 and a height adjustment drive 215 ; the height adjustment component 214 and the height adjustment drive 215 are mounted on the height adjustment mounting bracket 213 , and the height adjustment drive 215 is connected to the height adjustment component 214 .

[0056] The height adjustment mounting bracket 213 includes an upper support member 2131 and a lower support member 2132, and a fixing member 2133 is connected between the upper support member 2131 and the lower support member 2132; in this embodiment, the fixing member 2133 is cylindrical, and an upper connecting hole 21311 is provided on the upper support member 2131; a lower connecting hole 21321 and a mounting groove 21322 are provided on the lower support member 2132, the lower connecting hole 21321 is located at one end of the lower support member 2132 close to the first wheel 2111, and the mounting groove 21322 is located at the other end of the lower support member 2132 away from the first wheel 2111; the cross-sectional area of ​​the end of the lower support member 2132 close to the first wheel 2111 is greater than the cross-sectional area of ​​the other end of the lower support member 2132 away from the first wheel 2111. This not only improves the stability of the lower support member 2132, but also facilitates the cooperation between the lower support member 2132 and the first wheel.

[0057] The height adjustment assembly 214 includes a height adjustment movable part 2141 and a height adjustment connecting part 2142; the height adjustment movable part 2141 is provided with a hole that cooperates with the fixed part 2133, the height adjustment movable part 2141 is slidably set on the fixed part 2133, the height adjustment connecting part 2142 is set below the lower support part 2132, and the height adjustment movable part 2141 extends downward with a height adjustment connecting rod 2143, the height adjustment connecting rod 2143 passes through the lower connecting hole 21321 and is connected to the height adjustment connecting part 2142; the height adjustment connecting part 2142 is connected to the bearing connecting part 2113.

[0058] The height adjustment drive 215 includes a height adjustment drive motor 2151 and a height adjustment threaded shaft 2152. The height adjustment threaded shaft 2152 passes through the upper connection hole 21311 and is installed on the installation groove 21322. The height adjustment drive motor 2151 is connected to the height adjustment threaded shaft 2152 through a coupling 2153. The height adjustment movable part 2141 is installed on the height adjustment threaded shaft 2152. The height adjustment drive motor 2151 drives the height adjustment movable part 2141 to move up and down on the fixing part 2133. When the height adjustment drive motor 2151 drives the height adjustment threaded shaft 2152 to rotate, the height adjustment movable part 2141 cooperates with the height adjustment threaded shaft 2152 to achieve the up and down movement of the height adjustment movable part 2141.

[0059] The second wheel device 22 includes a second wheel set 221, a second wheel set connecting member 222 and a shock absorbing device 223. The second wheel set connecting member 222 is connected to the second wheel set 221. The second wheel set 221 includes a second wheel 2211 and a second wheel connecting member 2212. The second wheel connecting member 2212 includes a first connecting portion 22121, a second connecting portion 22122 and a third connecting portion 22123. The first connecting portion 22121 and the second connecting portion 22122 are connected to the second wheel set 221. The three connecting parts 22123 are symmetrically arranged, and the third connecting part 22123 is connected to the second wheel 2211; the second wheel group connecting member 222 includes a first connecting member 2221 and a second connecting member 2222, one end of the first connecting member 2221 is sleeved on the frame 4, and the other end of the first connecting member 2221 is hinged to the first connecting part 22121; one end of the second connecting member 2222 is sleeved on the frame 4, and the other end of the second connecting member 2222 is hinged to the second connecting part 22122. One end of the shock absorber 223 is hinged to the frame 4, and the other end of the shock absorber 223 is hinged to the first connecting member 2221.

[0060] The second wheel 2211 is a driven wheel. When the second wheel is driven, the first connecting portion 22121 and the second connecting portion 22122 swing, and the vibration of the frame caused by the movement of the second wheel is reduced by the shock absorbing device 223 . A height adjustment connecting rod 2142 extends downward through the height adjustment movable part 2141, and the first wheel is connected to the height adjustment connecting part through a bearing connecting part, so that the height adjustment drive can drive the height adjustment movable part 2141 to move. When the height of the first wheel needs to be adjusted, the height adjustment drive motor 2151 rotates, and the height adjustment movable part 2141 is moved up and down through the height adjustment threaded shaft 2152. The height adjustment movable part 2141 moves up and down between the upper support part and the lower support part, and drives the first wheel to move up and down. A fixing part is connected between the upper support part and the lower support part, so that the upper support part and the lower support part can be connected to fix the upper support part and the lower support part, and the height adjustment movable part can be moved on the fixing part. The height adjustment movable part 2141 can drive the first wheel to move up and down in the space between the bottom of the frame and the first wheel along the sliding direction of the fixing part 2133; in this way, the up and down height of the first wheel can be adjusted so that the first wheel and the second wheel are not on the same horizontal plane.

[0061] When the tunnel cleaning machine is working, the up and down height of the first wheel is adjusted according to the height of the tunnel shoulder, so that the first wheel is on the road and the second wheel is on the shoulder. Such a tunnel cleaning machine occupies less road area when working, effectively reducing the impact of cleaning on tunnel traffic efficiency.

[0062] The working principle of a tunnel cleaning machine provided by the present invention is as follows:

[0063] a) According to the height control of the tunnel shoulder, adjust the height of the first wheel so that the first wheel is on the road surface and the second wheel is on the shoulder; when the first wheel is adjusted to a suitable position, proceed to step b);

[0064] b). Control the air compression mechanism to start, and when the pressure of the air compression mechanism reaches the working requirements, proceed to step c);

[0065] c) Control the recovery device to start, the first battery valve and the second battery valve to open; when the gas is mixed and circulated at the nozzle, proceed to step d);

[0066] d). Control the nozzle to clean the tunnel wall, and the controller controls the recovery device to absorb the dirt that falls off the tunnel wall after cleaning and the gaseous carbon dioxide formed by the vaporization of dry ice; when the tunnel wall cleaning is completed, proceed to step e);

[0067] e) Control the first battery valve, the second battery valve and the air compression device to close; when the first battery valve, the second battery valve and the air compression device are closed and the recovery device has completed the recovery of the material, proceed to step f)

[0068] f). Control the recovery device to close, the nozzle to restore the initial state, and proceed to step g);

[0069] g). Adjust the height of the first wheel so that the first wheel and the second wheel are at the same level.

[0070] Before cleaning, the first wheel and the second wheel are at the same level. During operation, the height of the first wheel is adjusted according to the current tunnel shoulder height so that the first wheel contacts the road surface of the current tunnel and the second wheel contacts the tunnel shoulder. After cleaning, the height of the first wheel is adjusted again so that the first wheel returns to the same level as the second wheel.

[0071] This cleaning method uses a tunnel cleaning machine to clean the tunnel. The nozzle moves longitudinally, horizontally, and swings left and right to achieve all-round cleaning of the tunnel. It has a fast cleaning speed, high cleaning degree, and high work efficiency. By adjusting the height of the first wheel, the first wheel of the cleaning machine is on the road surface and the second wheel is on the shoulder, which reduces the occupation of the road and reduces the risk of traffic accidents. The dirt after tunnel cleaning and the carbon dioxide formed by the gasification of dry ice are immediately recovered through the negative pressure principle, reducing secondary operations and thus reducing work costs. Moreover, tunnel cleaning and absorption of recycled materials are carried out simultaneously, with high work efficiency and reduced operation costs.

Claims

1. A tunnel cleaning machine, comprising a frame, a cleaning mechanism, a recovery device and a moving device, characterized in that: The cleaning mechanism includes a cleaning device, an air compression mechanism and a liquid carbon dioxide storage tank. The cleaning device is connected to the recovery device, the air compression mechanism and the liquid carbon dioxide storage tank respectively. The cleaning device includes a circulation member, a cleaning moving device, a nozzle and a connecting member, wherein the nozzle is located at one end of the circulation member, the connecting member is located at the other end of the circulation member, the cleaning moving device is connected to the connecting member, the circulation member includes a first channel and a second channel, the second channel is arranged inside the first channel, and the first channel and the second channel are not connected; The nozzle includes an injection part connected to the first channel and a recovery part connected to the second channel; the connecting piece includes a first through hole, a second through hole and a third through hole, the first through hole and the second through hole are connected to the first channel, and the third through hole is connected to the second channel; The first through hole and the second through hole are symmetrically arranged with respect to the third through hole; the air compression mechanism is connected to the first through hole through a first pipeline, the liquid carbon dioxide storage tank is connected to the second through hole through a second pipeline, and the recovery device is connected to the third through hole through a recovery pipeline; The recovery device includes a negative pressure device and a recovery barrel, wherein the negative pressure device is connected to the recovery barrel; the recovery barrel includes a recovery channel and a recovery connection portion, wherein the recovery channel extends from the inner wall of the recovery barrel to the bottom of the recovery barrel; the recovery connection portion extends from the outer wall of the recovery barrel to the outside; the recovery channel is connected to the recovery connection portion, and the recovery connection portion is connected to the recovery pipeline; The mobile device includes a first wheel device and a second wheel device, the first wheel device is arranged on one side of the frame, and the second wheel device is arranged on the other side of the frame; the first wheel device includes a first wheel group and a height adjustment device; the first wheel group includes a first wheel and a wheel bearing, the first wheel is connected to the wheel bearing, a bearing connector extends outward from the wheel bearing, the first wheel is connected to the height adjustment device through the bearing connector, and there is a space between the first wheel and the bottom of the frame; The height adjustment device includes a height adjustment mounting bracket, a height adjustment component and a height adjustment drive; the height adjustment component and the height adjustment drive are mounted on the height adjustment mounting bracket, and the height adjustment drive is connected to the height adjustment component; The height adjustment mounting bracket includes an upper support member and a lower support member, and a fixing member is connected between the upper support member and the lower support member; the upper support member is provided with an upper connecting hole; the lower support member is provided with a lower connecting hole and a mounting groove, the lower connecting hole is arranged on one side of the fixing member, and the mounting groove is arranged on the other side of the fixing member; The height adjustment assembly includes a height adjustment movable part and a height adjustment connecting part; the height adjustment movable part extends downwardly with a height adjustment connecting rod, the height adjustment movable part is slidably arranged on the fixed part, the height adjustment connecting part is arranged below the lower support part, the height adjustment connecting rod passes through the lower connecting hole and is connected to the height adjustment connecting part; the height adjustment connecting part is connected to the bearing connecting part; The second wheel device includes a second wheel group and a second wheel group connecting member, the second wheel group connecting member is connected to the second wheel group; the second wheel group includes a second wheel and a wheel frame, the wheel frame includes a first connecting portion, a second connecting portion and a third connecting portion, the first connecting portion and the second connecting portion are symmetrically arranged about the third connecting portion, and the third connecting portion is connected to the second wheel.

2. A tunnel cleaning machine according to claim 1, characterized in that: The air compression mechanism includes a compression device and an air storage bottle. The compression device includes an air extraction device, an air extraction drive motor, an air extraction drive flywheel, an air extraction driven flywheel and an air extraction belt. The air extraction drive flywheel is connected to the air extraction drive motor, the air extraction driven flywheel is connected to the air extraction device, the air extraction belt is sleeved between the air extraction drive flywheel and the air extraction driven flywheel, and the air storage bottle is connected to the air extraction device through a pipeline.

3. A tunnel cleaning machine according to claim 1, characterized in that: The negative pressure device includes a negative pressure drive motor, fan blades and a negative pressure pipe. The negative pressure pipe passes through the wall of the recycling barrel and is fixed on the recycling barrel. The negative pressure drive motor is installed on the frame. The fan blades are connected to the negative pressure drive motor and are located in the negative pressure pipe.

4. A tunnel cleaning machine according to claim 1, characterized in that: The cleaning moving device includes a slide rail frame, a transverse moving mechanism, a longitudinal motor, a nozzle steering motor, and a screw rod. The transverse moving mechanism includes a rack guide, a transverse motor, and a transverse motor bracket. Both ends of the rack guide are connected to the slide rail frame. The transverse motor is installed on the rack guide through the transverse motor bracket. The output end of the transverse motor is connected to the rack guide. One end of the nozzle steering motor is connected to the transverse motor bracket, and the other end is connected to the connecting piece.

5. A tunnel cleaning machine according to claim 1, characterized in that: The height adjustment drive includes a height adjustment drive motor and a height adjustment threaded shaft. The height adjustment drive motor is connected to the height adjustment threaded shaft through a coupling; the height adjustment threaded shaft passes through the upper connecting hole and is installed on the mounting groove; the height adjustment movable part is installed on the height adjustment threaded shaft, and the height adjustment drive motor drives the height adjustment movable part to move up and down on the fixed part.

6. A tunnel cleaning machine according to claim 5, characterized in that: The second wheel group connecting member includes a first connecting member and a second connecting member, one end of the first connecting member is sleeved on the frame, and the other end of the first connecting member is hinged to the first connecting part; one end of the second connecting member is sleeved on the frame, and the other end of the second connecting member is hinged to the first connecting part; the second wheel device also includes a shock absorbing device, one end of the shock absorbing device is hinged to the frame, and the other end of the shock absorbing device is hinged to the first connecting part.

7. A tunnel cleaning machine according to claim 4, characterized in that: The injection portion of the first channel includes four injection ports arranged in a straight line.

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