Tunnel center ditch autonomous cleaning system

Abstract

The present invention relates to an autonomous cleaning system for a tunnel central ditch, comprising a water supply unit that provides cleaning water to a water spray unit through a pipe located at one side of the tunnel and arranged along the axial direction of the tunnel via a water pump; the water spray unit is arranged in the space below the pavement structure inside the tunnel, and at least one group is arranged at a set distance along the axial direction of the tunnel central ditch, each group of water spray units is respectively connected to the water outlet branch pipe of the water pump corresponding to the water supply unit, and the rotating nozzle of the water spray unit is located inside the central ditch; the monitoring control unit unit uses a first flow velocity sensor connected to the inner wall of the central ditch and an image acquisition module connected to the rotating nozzle to monitor the water flow state of the central ditch; based on the acquired image and flow velocity information, the working state of the cleaning system is controlled. The central ditch is divided into areas with a set distance, and each area delays the blockage of the central ditch in an active maintenance manner.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel drainage, and in particular to an autonomous cleaning system for a tunnel central ditch. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In the tunnel drainage system, the groundwater behind the lining will be collected into the central ditch set under the road surface inside the tunnel through the annular, longitudinal and transverse drainage pipes and discharged out of the tunnel. Therefore, the smoothness of the central ditch directly affects the working state of the drainage system. Due to various reasons such as geological environment, design and construction defects and later maintenance, the tunnel lining drainage system will have different degrees of crystallization and siltation, resulting in poor drainage or even blockage of the tunnel, causing tunnel bottom bulge, road bulge, lining cracking and water leakage, etc., affecting driving safety and tunnel service life.

[0004] Current research shows that the blockage of the central ditch during the operation of the tunnel is mainly caused by the following factors: (1) seepage crystallization, that is, groundwater seeps into the tunnel drainage pipe, and the ions in the aqueous solution combine to form insoluble carbonates, sulfates, etc. (mainly CaCO3) attached to the inner surface of the pipe; (2) rock fragments and rock particles generated by the surrounding rock under the scouring action of groundwater flow are transported to the tunnel drainage pipe with the groundwater flow; (3) some silt and fine particles enter the tunnel drainage pipe along with the movement of water flow during the process of surface water replenishing groundwater; (4) biological sources, such as moss plants, microorganisms, etc. growing on the inner wall of the drainage pipe.

[0005] In the case of drainage ditch blockage, the traditional approach is to inspect and clear the ditch manually. After the blockage status of the central ditch is determined by on-site survey, radar scanning, endoscopic inspection, etc., a working well is excavated at the inspection well location to clear the ditch. This method has a long cleaning cycle, high cost, and requires the destruction of the pavement structure. In addition, due to the limited maintenance energy and cost of the maintenance unit, the above method can only be adopted when the drainage system of the tunnel has been blocked. It is a passive measure. In the process of the drainage pipe from being unobstructed to being blocked, it has been in a state of incomplete drainage for a long time. In some karst areas, the crystallization speed is extremely fast. After dredging, it will return to the blocked state again in a very short time. The frequency of manual cleaning cannot fully meet the cleaning needs, which seriously threatens the safety of the structure. Summary of the invention

[0006] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides an autonomous cleaning system for the central ditch of the tunnel, in which a plurality of groups of water spray units are evenly arranged along the direction of the central ditch of the tunnel, and the water pump in the water spray unit is used as the power of the cleaning water. The cleaning water is transported to the rotating nozzle located inside the central ditch through a pipeline, and the cleaning water is sprayed along the drainage flow direction of the central ditch regularly or irregularly to avoid blockage of the central ditch in an active maintenance manner, thereby reducing the cost required for cleaning after the central ditch is blocked, and improving the information and intelligence level of daily operation and maintenance of the tunnel.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] The first aspect of the present invention provides a tunnel central ditch autonomous cleaning system, comprising:

[0009] The water supply unit provides cleaning water to the water spray unit through a water pump via a pipeline located at one side of the tunnel and arranged along the tunnel axis;

[0010] The water spray unit is arranged in the space below the pavement structure inside the tunnel, and at least one group is arranged at a set distance along the axis direction of the central water ditch of the tunnel, each group of water spray units is respectively connected to the water outlet branch pipe of the water pump corresponding to the water supply unit, and the rotating nozzle of the water spray unit is located inside the central water ditch;

[0011] The monitoring control unit utilizes the first flow velocity sensor connected to the inner wall of the central ditch and the image acquisition module connected to the rotating nozzle to monitor the water flow status of the central ditch, and the second flow velocity sensor and water pressure sensor connected to the outlet branch pipe to monitor the working status of the system; based on the acquired image, flow velocity and water pressure information, the control command is executed and sent to the background server for storage.

[0012] The water supply unit includes a water supply pipe which is arranged on one side of the tunnel and along the axial direction of the tunnel. The water supply pipe is provided with a water pump which supplies water to each group of water spraying units respectively. The inlet of each group of water pumps is connected to the water supply pipe through a corresponding water inlet branch pipe, and the outlet of each group of water pumps is connected to the corresponding water spraying unit through a water outlet branch pipe.

[0013] The water spray unit includes a rotating nozzle connected by a water outlet branch pipe, the rotating nozzle is located inside the central ditch and faces the drainage flow direction of the central ditch, the water outlet branch pipe above the rotating nozzle is connected to the fixing groove through a T-shaped fixing piece, and the fixing groove is located at the top of the inner side of the central ditch.

[0014] The water spray unit includes a rotating nozzle connected to a water outlet branch pipe through a hose, the rotating nozzle is located inside the central ditch and faces the drainage flow direction of the central ditch; the hose is wound on a hose reel, and the hose reel is located in a reserved cavern on one side of the inspection well of the central ditch, and the reserved cavern is located in the space below the pavement structure inside the tunnel.

[0015] The water spray unit also includes a track arranged at the top of the inner side of the central water ditch along its axial direction, and a transmission belt arranged along the axial direction of the track is provided in the internal space of the track. The transmission belt is connected to at least one set of pulleys, and each set of pulleys is connected to the corresponding rotating nozzle through a connecting piece extending from the track.

[0016] The track comprises a connected straight track and a curved track, and one end of the straight track is connected to the curved track.

[0017] An active transmission cavity and a passive transmission cavity are respectively arranged at both ends of the transmission belt. The gear in the active transmission cavity is driven by the driving motor and meshes with the transmission belt, and the gear in the passive transmission cavity meshes with the transmission belt.

[0018] The drive motor is located in the reserved cavern of the inspection well of the central ditch. The reserved cavern is located in the space below the pavement structure inside the tunnel. The drive motor is installed at one end of the active transmission cavity and is connected to the gear in the active transmission cavity through a transmission shaft, driving the gear to rotate forward and reverse.

[0019] The pulley includes a pulley body formed by clamping and connecting with a transmission belt through at least two groups of clips, pulleys are connected to both sides of the pulley body, the pulleys abut against the inner wall of the track, and the pulley body is connected to the rotating nozzle through a connecting piece.

[0020] A sealing strip brush is arranged in the inner space of the track, and the sealing strip brush covers both sides of the connecting piece.

[0021] The first flow velocity sensors are evenly arranged on the inner wall along the axis direction of the central ditch, the second flow velocity sensor and the water pressure sensor are connected to the outlet branch pipe, and the image acquisition module is connected to the side of the rotating nozzle facing the drainage flow direction of the central ditch.

[0022] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0023] 1. The central ditch is divided into areas with set distances. In each area, multiple groups of water spraying units arranged at set distances along the central ditch of the tunnel are used to spray cleaning water to complete the daily cleaning of the central ditch, thereby delaying or avoiding the blockage of the central ditch in an active maintenance manner.

[0024] 2. Use the image acquisition module and flow rate sensor to monitor and judge the water flow status of the central ditch, timely analyze the location of serious blockage in the ditch, adjust the cleaning frequency as needed, and focus on cleaning specific areas.

[0025] 3. The rotating nozzle in the water spray unit achieves full coverage of the central ditch longitudinally and circumferentially by moving longitudinally and rotating circumferentially, without any blind spots in cleaning.

[0026] 4. The main water spraying equipment involved does not occupy the water flow space of the central ditch when in standby mode, and is less affected by groundwater.

[0027] 5. The system can operate around the clock, greatly increasing the cleaning frequency and efficiency, effectively preventing the accumulation of blockages, and can adapt to the central ditches of tunnels with different cross-section types.

[0028] 6. Specific additives can be added to the clean water through the water supply pipe as needed to enhance the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0030] Figure 1 (a)-(b) is a schematic overall plan view of an autonomous cleaning system for a tunnel central ditch provided in Example 1 of the present invention;

[0031] 2(a)-(b) are schematic cross-sectional structural diagrams of the system provided in the inspection well according to the first embodiment of the present invention;

[0032] 3(a)-(b) are schematic diagrams of the longitudinal section and cross-sectional structure of the central ditch of the system provided in Example 1 of the present invention;

[0033] 4(a)-(c) are schematic diagrams of the track plane structure of the system provided in Example 1 of the present invention;

[0034] 4(d)-(e) are schematic cross-sectional structural diagrams of a straight track and a curved track in the track provided in Embodiment 1 of the present invention;

[0035] 5(a)-(b) are overall plan views of the tunnel center ditch autonomous cleaning system provided in the second embodiment of the present invention;

[0036] 6(a)-(b) are schematic cross-sectional structural diagrams of the system provided in the inspection well according to the second embodiment of the present invention;

[0037] 7(a)-(b) are schematic diagrams of the longitudinal section and cross-sectional structure of the central water ditch of the system provided in the second embodiment of the present invention;

[0038] 8(a)-(b) are schematic diagrams of a skeleton-supported track structure applicable to an existing central water ditch provided in Embodiment 3 of the present invention;

[0039] In Figure 1-2: 10 central ditch, 11 inspection well, 12 cable trench, 13 road surface structure, 14 inspection port, 1-1 first flow velocity sensor, 1-2 infrared camera, 2-1 water supply pipe, 2-2 water inlet branch pipe, 2-3 water outlet branch pipe, 2-4 water pump, 2-5 hose reel, 2-6 hose, 3-1 rotary nozzle, 3-2 linear track, 3-3 turning track, 3-4 track transmission cavity, 3-5 transmission belt, 3-6 pulley, 3-7 active transmission cavity, 3-8 passive transmission cavity, 3-9 transmission gear, 4-1 control module, 4-2 second flow velocity sensor, 4-3 water pressure sensor;

[0040] In Figure 3-4: 3-3-1 vertical roller, 3-5-1 peak tooth structure, 3-6-1 clip, 3-6-2 pulley, 3-6-3 connector, 3-10 drive motor, 3-10-1 transmission shaft, 3-11 sealing strip brush, 3-11-1 base plate, 3-11-2 brush wire;

[0041] In Figure 5-7: 1-T-shaped fixing piece, 2-fixing groove, 3-tee pipe;

[0042] In FIG8 : 10 - 1 is annular skeleton, 10 - 2 is longitudinal connecting rod. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0044] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] As described in the background technology, the central ditch of the tunnel will have different degrees of crystallization and siltation, resulting in poor drainage or even blockage of the tunnel, causing tunnel bottom bulges, road bulges, lining cracks and water leakage, affecting driving safety and tunnel service life. The existing cleaning method is costly and difficult to implement, and is generally only used when the central ditch is seriously blocked.

[0047] Therefore, the following embodiment provides an autonomous cleaning system for the central ditch of the tunnel, in which multiple groups of water spray units are evenly arranged along the direction of the central ditch of the tunnel, and the water pump in the water spray unit is used as the power for cleaning water. The cleaning water is transported to the rotating nozzle located inside the central ditch through a pipeline, and the cleaning water is sprayed along the drainage flow direction of the central ditch regularly or irregularly, so as to avoid blockage of the central ditch in an active maintenance manner, thereby reducing the cost required for cleaning after the central ditch is blocked.

[0048] Embodiment 1:

[0049] As shown in Figure 1-4, the tunnel center ditch autonomous cleaning system includes:

[0050] The water supply unit provides cleaning water to the water spray unit through a water pump via a pipeline located at one side of the tunnel and arranged along the tunnel axis;

[0051] The water spray unit is arranged in the space below the pavement structure inside the tunnel, and at least one group is arranged at a set distance along the axis direction of the central water ditch of the tunnel, each group of water spray units is respectively connected to the water outlet branch pipe of the water pump corresponding to the water supply unit, and the rotating nozzle of the water spray unit is located inside the central water ditch;

[0052] The monitoring control unit utilizes the first flow velocity sensor connected to the inner wall of the central ditch and the image acquisition module connected to the rotating nozzle to monitor the water flow status of the central ditch, and the second flow velocity sensor and water pressure sensor connected to the outlet branch pipe to monitor the working status of the system; based on the acquired image, flow velocity and water pressure information, the control command is executed and sent to the background server for storage.

[0053] The relevant equipment, pipelines and components in the system are pre-buried in the tunnel center ditch, cable trench and reserved caverns below the road surface during tunnel construction or upgrading, as follows:

[0054] As shown in Figure 1, an inspection well 11 is set every 50m (or other distances that meet the requirements of the specifications) in the longitudinal direction of the central ditch 10 of the tunnel. In addition to being used for daily inspections, it also provides space for the installation and maintenance of related equipment of the cleaning system. The first flow velocity sensors 1-1 are evenly arranged on the inner wall along the axial direction of the central ditch 10.

[0055] As shown in Fig. 1-2, the water supply unit includes a water supply pipe 2-1 arranged on one side of the tunnel and arranged along the tunnel axis. The water supply pipe 2-1 is provided with a water pump 2-4 for supplying water to each group of water spraying units. The inlet of each group of water pumps 2-4 is connected to the water supply pipe 2-1 through a corresponding water inlet branch pipe 2-2, and the outlet of each group of water pumps 2-4 is connected to the corresponding water spraying unit through a water outlet branch pipe 2-3. The second flow velocity sensor 4-2 and the water pressure sensor 4-3 are connected to the water outlet branch pipe 2-3.

[0056] In this embodiment, the water supply pipe 2-1 is arranged in the cable trench 12 on one side of the tunnel, and the buried position can also be adjusted as needed. Clean water is provided by a well outside the tunnel or municipal water, but is not limited thereto.

[0057] In this embodiment, inspection ports 14 are provided at a certain interval in the water supply pipe, through which the pipe condition can be checked, and a cleaning agent with a specific function can be added through the inspection port to enhance the cleaning effect, such as adding an acidic dissolving agent to enhance the cleaning effect for crystallization in the karst area. The dissolving agent is added through a cleaning agent adding port provided at the inspection port 14 and connected to the water supply pipe.

[0058] In this embodiment, the water supply pipe 2-1 is made of hot-dip galvanized steel pipes with inner and outer walls, seamless steel pipes or inner and outer plastic-coated steel pipes, and the joints are connected by any existing connection methods such as threaded connection, flange connection or welding connection.

[0059] In this embodiment, the water pump 2-4 is a high-pressure water pump, which is arranged in the space below the pavement structure 13, for example, it can be arranged in a reserved hole on one side of the water supply pipe 2-1.

[0060] The water spray unit includes a rotating spray head 3-1 connected to the water outlet branch pipe 2-3 through a hose 2-6. The rotating spray head 3-1 is located inside the central ditch and faces the drainage flow direction of the central ditch.

[0061] The hose 2-6 is wound on the hose reel 2-5, and the hose reel 2-5 is located in a reserved cavern in the inspection well 11, and the reserved cavern is located in the space below the pavement structure 13 inside the tunnel.

[0062] In this embodiment, the rotating nozzle 3-1 is a high-pressure rotating nozzle, which can automatically rotate around the axis under the action of the centrifugal force and recoil force of the water flow after water is passed through. The material of the high-pressure rotating nozzle is high-strength stainless steel.

[0063] In this embodiment, hoses 2-6 are high-pressure metal hoses, and the high-pressure rotating nozzle is connected to the water pump through the high-pressure metal hose. The cleaning water is powered by the water pump and transported to the outlet of the rotating nozzle through the water outlet branch pipe and the high-pressure metal hose, so as to delay the blockage by cleaning the central ditch.

[0064] The image acquisition module is connected to the side of the rotating nozzle 3-1 facing the drainage flow direction of the central ditch. The image acquisition module in this embodiment is an infrared camera, which can obtain the flow image information of the drainage in the central ditch in the dark environment of the tunnel. After transmitting it to the control unit, it is convenient for the staff to judge the blockage situation of the central ditch according to the flow velocity, adaptively adjust the flow rate, water pressure and opening frequency of the water pump, or control the rotating nozzle to move to a specific position for special cleaning, so as to realize the cleaning of the central ditch.

[0065] As shown in FIG3-4, the water spray unit also includes a track arranged at the top inner side of the central water ditch 10 along its axial direction, and a transmission belt 3-5 arranged along the axial direction of the track is provided in the inner space of the track. The transmission belt 3-5 is connected to at least one set of pulleys 3-6, and each set of pulleys 3-6 is connected to the corresponding rotating nozzle 3-1 through a connector 3-6-3 extending out of the track.

[0066] The transmission belt 3-5 drives the pulley 3-6 to move along the track, and the rotating nozzle 3-1 moves along the inside of the central ditch 10 through the connecting piece 3-6-3, so that the central ditch 10 within a certain length range is cleaned. When the pulley 3-6 drives the rotating nozzle 3-1 to move through the connecting piece 3-6-3, the corresponding hose reel 2-5 is started to release or retract the hose 2-6. Correspondingly, the hose 2-6 is coaxially arranged with the power line and signal line of the image acquisition module to achieve synchronous release or retraction.

[0067] In this embodiment, the hose reel 2-5 has a hose arranging function, which can arrange the retracted hoses 2-6 neatly to ensure that they are not entangled with each other. The hose arranging function is an existing function of the hose reel 2-5 and will not be described in detail in this embodiment.

[0068] The track includes a connected straight track 3-2 and a turning track 3-3. One end of the straight track 3-2 is connected to the turning track 3-3. The cross section of the turning track 3-3 is an arc and adapts to the shape of the central ditch 10 after being connected to the straight track 3-2, so that the rotating nozzle 3 moves in a curve at the end of the straight track 3-2.

[0069] The material of the transmission belt 3-5 can be selected but not limited to polyurethane, and a longitudinal high-strength tensile steel wire is arranged inside, and a peak tooth structure 3-5-1 is arranged on the surface. The two ends of the transmission belt are connected by a pulley 3-6 to form a closed structure. The shape of the peak tooth structure includes but is not limited to triangle, rectangle, etc.

[0070] An active transmission cavity 3-7 and a passive transmission cavity 3-8 are respectively provided at both ends of the transmission belt 3-5. The gear in the active transmission cavity 3-7 is driven by the driving motor 3-10 and meshes with the transmission belt 3-5. The gear in the passive transmission cavity 3-8 also meshes with the transmission belt 3-5.

[0071] The driving motor 3-10 is located in the reserved cavern of the inspection well 11, and the reserved cavern is located in the space below the pavement structure 13 inside the tunnel. The driving motor 3-10 is installed at one end of the active transmission cavity and is connected to the gear in the transmission cavity through a transmission shaft, driving the gear to rotate in the forward and reverse directions, so that the transmission belt 3-5 drives the pulley 3-6 and then drives the rotating nozzle 3 to form a transmission chain.

[0072] The pulley 3-6 includes a pulley body formed by clamping and connecting with the transmission belt 3-5 through at least two sets of clips 3-6-1, and the pulleys 3-6-2 are rotatably connected on both sides of the pulley body, and the pulleys 3-6-2 abut against the inner wall of the track. The pulley body is connected to the rotating nozzle 3 through the connecting piece 3-6-3.

[0073] A sealing strip brush 3-11 is provided in the track transmission cavity 3-4, and the sealing strip brush 3-11 covers both sides of the connecting piece 3-6-3.

[0074] The sealing strip brush 3-11 plays a sealing role to prevent groundwater from entering the internal components of the track. The sealing strip brush includes a connected base plate 3-11-1 and a brush wire 3-11-2. The brush wire 3-11-2 is coated with sealing grease and contacts the connector 3-6-3 to block the groundwater and cleaning water in the central ditch 10 from entering the track.

[0075] In this embodiment, the cross-section of the track is a rectangle with an opening at the bottom, and the interior is a track transmission cavity 3-4. The bottom opening is used for the connector 3-6-3 to extend out, the transmission belt 3-5 is located on both sides of the track transmission cavity 3-4, the pulley 3-6 is located on one side of the track transmission cavity 3-4, and the sealing strip brush 3-11 is located in the middle of the track transmission cavity 3-4 and covers both sides of the connector 3-6-3.

[0076] A vertical roller 3-3-1 is arranged in the track transmission cavity 3-4 of the turning track 3-3, and when the pulley 3-6 runs to the turning track, the pulley 3-6 is pushed to help it turn, thereby reducing the resistance of the track side wall when the transmission belt and the pulley move in the turning track.

[0077] Operation control system of the above units:

[0078] The water pipes, rotating sprinklers and other equipment between adjacent inspection wells form a subsystem. All subsystems work independently, are independently controlled, supply water in parallel, do not interfere with each other, and are uniformly controlled by the operation control system.

[0079] The operation control system includes a controller, a water pressure sensor, a second flow rate sensor and a remote control system.

[0080] The controller connects the water pump and the drive motor, and is connected to the operation control system signal, so that the opening and closing of the high-pressure water pump and the water pressure and the forward and reverse rotation of the drive motor can be remotely controlled. For example, the control module 4-1 connected to the water pump 2-4 can be used for control.

[0081] The water pressure sensor and the second flow rate sensor are installed in the water pipe at the outlet of the high-pressure water pump. They can monitor the water pressure and flow rate in the pipeline and transmit them to the operation control system. The operation control determines the working status of each subsystem by monitoring and analyzing the water pressure and flow rate.

[0082] The system works as follows:

[0083] (1) The image acquisition module (infrared camera) in the monitoring unit can check the blockage situation and cleaning effect through images.

[0084] (2) The water supply unit provides special cleaning water, to which specific additives can be added as needed to enhance the cleaning effect. The water is pressurized by a high-pressure water pump and sent to a mobile water spraying system. The water-passing self-rotating nozzle moves longitudinally inside the pipe through a track while spraying water, thereby achieving the cleaning of the pipe.

[0085] (3) The operation of the water spray unit is divided into three modes: patrol mode, daily cleaning, and special cleaning. In the patrol mode, the high-pressure rotary nozzle carries an infrared camera and moves along the interval and transmits the image to the control unit; in the daily cleaning mode, according to the settings, the system is turned on at a specific time frequency (such as cleaning once a day) to complete one or more cycles of cleaning. A cycle of cleaning refers to the high-pressure rotary nozzle completing a back-and-forth water spraying movement in the interval; in the special cleaning mode, combined with the water flow rate at different positions and image analysis, the pipeline is divided into sections to determine whether there are blockages that are difficult to clean. According to the situation, the rotary nozzle is operated to move to the designated area, and the water pressure and other parameters are adjusted to focus on cleaning specific locations.

[0086] (4) After each cleaning work is completed, the system enters the standby state, and the rotating nozzle moves to one side through the turner and stays outside the water flow section without affecting the water flow capacity of the ditch.

[0087] (5) When the system is in operation, the hose reel works in conjunction with the drive motor 3-10 to extend or retract the high-pressure water hose in coordination with the reciprocating movement of the rotating nozzle.

[0088] The above system divides the central ditch into areas with set distances. Each area uses multiple groups of water spraying units arranged at set distances along the central ditch of the tunnel to spray cleaning water to complete the daily cleaning of the central ditch, thereby delaying or avoiding blockage of the central ditch in an active maintenance manner.

[0089] The image acquisition module and flow rate sensor are used in conjunction to monitor and judge the water flow status of the central ditch, timely analyze the locations of serious blockages in the ditch, adjust the cleaning frequency as needed, and focus on cleaning specific areas that have been divided.

[0090] The rotating nozzle in the water spray unit achieves full coverage in the longitudinal and circumferential directions by moving longitudinally and rotating circumferentially, with no blind spots in cleaning.

[0091] The main equipment involved does not occupy the water flow space of the central ditch when in standby mode and is less affected by groundwater.

[0092] The system can operate around the clock, greatly increasing the frequency and efficiency of cleaning and effectively preventing the accumulation of blockages.

[0093] Specific additives are added to the clean water as needed to enhance the cleaning effect, forming a dedicated clean water supply unit.

[0094] Embodiment 2:

[0095] As shown in FIGS. 5-7 , this embodiment changes the structure of the water spray unit based on the first embodiment, changes the rotating spray head connected to the hose into a rigid pipe, and eliminates the track, the transmission belt and the pulley, as follows:

[0096] The water spray unit includes a rotating nozzle 3-1 connected by a water outlet branch pipe 2-3. The rotating nozzle 3-1 is located inside the central ditch and faces the drainage flow direction of the central ditch. The water outlet branch pipe 2-3 above the rotating nozzle 3-1 is connected to the fixing groove 2 through a T-shaped fixing member 1. The fixing groove 2 is located at the top of the inner side of the central ditch 10.

[0097] In this embodiment, each group of water inlet branches 2-2 in the water supply unit is connected to the water supply pipe 2-1 through the corresponding three-way pipe 3. After the clean water is pressurized by the water pump 2-4, it reaches the rotating nozzle 3-1 through the water outlet branch 2-3 to complete the cleaning.

[0098] In this embodiment, the fixing groove is pre-buried on the top of the central ditch structure, and the materials used include but are not limited to high-strength stainless steel.

[0099] The system of Example 2 also divides the central ditch into areas of set distances. Each area uses multiple groups of water spray units arranged at set distances along the central ditch of the tunnel to spray cleaning water to complete daily cleaning of the central ditch, thereby delaying or avoiding blockage of the central ditch in an active maintenance manner.

[0100] What is different from the first embodiment is that a water outlet pipe is used to directly connect the rotating sprinkler head, and the hose, hose reel, and matching track, transmission belt, and pulley are eliminated, so that the rotating sprinkler head cannot move along the axis of the central ditch, and the structure is simpler. However, for the sake of cleaning effect, the setting interval of the water spray unit can be smaller than that of the first embodiment.

[0101] Embodiment three:

[0102] Taking into account that for existing tunnels, rebuilding the central ditch requires demolishing the road surface structure, which is costly, complicated, and affects traffic, this embodiment proposes a skeleton-supported track for the straight track 3-2 and the turning track 3-3 in Embodiment 1, which is used for non-destructive reconstruction of the central ditch of the existing tunnel, or for situations where there are no conditions for pre-embedded construction of the central ditch.

[0103] The skeleton-supported track includes at least one group of annular skeletons 10-1 arranged along the axis direction of the central ditch 10 and at a set distance. The shape of the annular skeleton 10-1 is consistent with the cross-section of the central ditch 10 and is connected to the inner side of the central ditch 10. Multiple groups of annular skeletons 10-1 are connected together by at least one group of longitudinal connecting rods 10-2. The segmented track is connected to the top space of the annular skeleton 10-1. The cross-sectional shape of the segmented track is the same as the straight track 3-2 and the turning track 3-3 in Example 1.

[0104] The skeleton track is composed of a segmented metal skeleton and a segmented track. Each segment of the segmented metal skeleton is D in length and is composed of two or more annular skeletons and multiple longitudinal connecting rods. The shape of the annular skeleton is consistent with the cross-section of the central ditch and its size is slightly smaller than the ditch clearance to ensure that the skeleton can be placed in the ditch. The longitudinal connecting rods are used to longitudinally connect the annular skeleton. The segmented track is fixed on top of the annular skeleton. Each segment is D in length and is fixedly connected to the annular skeleton (a variety of connection methods can be selected).

[0105] When installing the skeleton-supported track, the segmented skeleton is placed in the central ditch in sections. The track and skeleton between the segments are fixedly connected by welding or other means. The skeleton and the central ditch body are fixed (the fixing method can be flexibly selected). For existing tunnels, the autonomous cleaning system can be installed without demolishing and rebuilding the central ditch. This track form can also be used when there are no conditions for pre-buried construction of the central ditch, which has almost no effect on the water-passing capacity of the ditch.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Tunnel center ditch autonomous cleaning system, characterized by: include: The water supply unit provides cleaning water to the water spray unit through a water pump via a pipeline located at one side of the tunnel and arranged along the tunnel axis; The water spray unit is arranged in the space below the pavement structure inside the tunnel, and at least one group is arranged at a set distance along the axis direction of the central water ditch of the tunnel, each group of water spray units is respectively connected to the water outlet branch pipe of the water pump corresponding to the water supply unit, and the rotating nozzle of the water spray unit is located inside the central water ditch; The monitoring control unit uses the first flow velocity sensor connected to the inner wall of the central water ditch and the image acquisition module connected to the rotating nozzle to monitor the water flow state of the central water ditch, and the second flow velocity sensor and water pressure sensor connected to the outlet branch pipe to monitor the working state of the system; based on the acquired image, flow velocity and water pressure information, the control command is executed and sent to the background server for storage; The water spray unit includes a rotating spray head connected to a water outlet branch pipe through a hose, the rotating spray head is located inside the central ditch and faces the drainage flow direction of the central ditch; the hose is wound on a hose reel, the hose reel is located in a reserved cavern on one side of the inspection well of the central ditch, and the reserved cavern is located in the space below the pavement structure inside the tunnel; The water spray unit also includes a track arranged at the top of the inner side of the central water ditch along its axial direction, and a transmission belt arranged along the axial direction of the track is provided in the inner space of the track. The transmission belt is connected to at least one group of pulleys, and each group of pulleys is connected to the corresponding rotating nozzle through a connecting piece extending out of the track.

2. The tunnel center ditch autonomous cleaning system according to claim 1, characterized in that: The water supply unit includes a water supply pipe arranged at one side of the tunnel and along the axial direction of the tunnel. The water supply pipe is provided with a water pump for supplying water to each group of water spraying units respectively. The inlet of each group of water pumps is connected to the water supply pipe through a corresponding water inlet branch pipe, and the outlet of each group of water pumps is connected to the corresponding water spraying unit through a water outlet branch pipe.

3. The tunnel center ditch autonomous cleaning system according to claim 1, characterized in that: The water spray unit includes a rotating nozzle connected by a water outlet branch pipe, the rotating nozzle is located inside the central ditch and faces the drainage flow direction of the central ditch, the water outlet branch pipe above the rotating nozzle is connected to the fixing groove through a T-shaped fixing piece, and the fixing groove is located at the top of the inner side of the central ditch.

4. The tunnel center ditch autonomous cleaning system according to claim 1, characterized in that: The inner space of the track is provided with sealing strip brushes, which cover both sides of the connecting piece.

5. The tunnel center ditch autonomous cleaning system according to claim 1, characterized in that: The pulley includes a pulley body formed by at least two groups of clips and a transmission belt clamped and connected, pulleys are connected to both sides of the pulley body, the pulleys abut against the inner wall of the track, and the pulley body is connected to the rotating nozzle through a connecting piece.

6. The tunnel center ditch autonomous cleaning system according to claim 1, characterized in that: The track comprises a connected straight track and a turning track, and one end of the straight track is connected to the turning track.

7. The tunnel center ditch autonomous cleaning system according to claim 1, characterized in that: An active transmission cavity and a passive transmission cavity are respectively arranged at both ends of the transmission belt. The gear in the active transmission cavity is driven by the driving motor and meshes with the transmission belt, and the gear in the passive transmission cavity meshes with the transmission belt.

8. The tunnel center ditch autonomous cleaning system according to claim 7, characterized in that: The driving motor is located in a reserved cavern on one side of the inspection well of the central ditch. In the space below the road surface structure inside the tunnel, the drive motor is installed at one end of the active transmission cavity. It is connected to the gear in the active transmission cavity through a transmission shaft, driving the gear to rotate forward and reverse.

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