Tunnel lining cavity detection device

Abstract

The invention belongs to the technical field of tunnel detection, and particularly relates to a tunnel lining cavity detection device which comprises two arched side plates matched with a tunnel, a plurality of uniformly distributed arched base plates are fixedly arranged between the two arched side plates, and a control box is fixedly mounted on the inner arc surfaces of the two arched side plates together. The device further comprises a plurality of chain conveying assemblies, the multiple chain conveying assemblies are arranged on the outer sides of the arch-shaped base plates in a sleeving mode respectively, each chain conveying assembly is installed between the two arch-shaped side plates, and the control box controls all the chain conveying assemblies to work. The tunnel lining cavity detection efficiency can be improved, road surface management and control are not needed to influence traffic, daily inspection and maintenance are facilitated, meanwhile, a temperature field can reflect an internal structure more truly through heat dissipation, the detection accuracy is improved, impurities on the surface of a lining can be removed in advance, heat conduction is prevented from being hindered, and the service life of the lining is prolonged. And the accuracy of hole detection is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel detection, and in particular relates to a tunnel lining cavity detection device. Background Art

[0002] As the core of the tunnel structure, the cavity behind the tunnel lining is formed due to reasons such as imperfect construction vibration, surrounding rock deformation, and groundwater erosion. It is easy to cause lining cracking, water leakage, and even collapse, threatening the structural safety and operation. Conducting inspections can promptly detect hidden diseases, avoid the expansion of accidents, and ensure the long-term reliable operation of the tunnel.

[0003] Currently, there are various methods for detecting lining cavities. For example, a tunnel lining cavity detection device disclosed in the patent publication number CN221100621U uses a knocking method for cavity detection. Another example is the tunnel lining non-destructive detection device disclosed in the patent publication number CN106442726B, which uses non-contact non-destructive detection for cavity detection. However, both detection methods belong to single-point detection. The area of the tunnel lining is large, and it takes a long time to detect the lining cavity more completely, resulting in low detection efficiency. Secondly, after the tunnel is opened to traffic, when it is necessary to detect the lining cavity, road traffic control is required, which affects traffic and has a poor use effect. Summary of the Invention

[0004] The purpose of the present invention is to address the above problems and provide a tunnel lining cavity detection device.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A tunnel lining cavity detection device includes two arched side plates that match the tunnel. A plurality of evenly distributed arched base plates are fixedly arranged between the two arched side plates, and a control box is fixedly installed on the inner arc surfaces of the two arched side plates. The device further includes: A plurality of chain conveying components, respectively sleeved on the outer sides of the respective arched base plates, and each chain conveying component is installed between the two arched side plates. The control box controls the operation of each chain conveying component; A plurality of moving seats, respectively arranged on one side of each chain conveying component, and each moving seat is slidably connected to the outer arc surfaces of the two arched side plates. Each chain conveying component is used to drive the moving seat to move along the outer arc surface of the arched side plate. Each moving seat is equipped with a heating mechanism and a temperature measuring mechanism; A moving unit, connected to the two arched side plates, and the moving unit is used to drive the arched side plates to move along the tunnel; A heat dissipation unit, installed on the side wall of one of the arched side plates, and the heat dissipation unit is used to dissipate heat from the surface of the position heated by each heating mechanism.

[0006] Preferably, each of the heating mechanisms includes a pushing electric push rod fixedly inserted into the side wall of the moving seat, and a heat insulation groove plate is fixedly installed at the movable end of the pushing electric push rod. An electric heater is fixedly installed inside the heat insulation groove plate, and the electric heater is electrically connected to the control box.

[0007] Preferably, the temperature measuring mechanism includes a connecting plate fixedly installed on the side wall of the moving seat, and an infrared temperature measuring probe is fixedly inserted at one end of the side wall of the connecting plate away from the moving seat. The infrared temperature measuring probe is electrically connected to the control box.

[0008] Preferably, the moving unit includes a groove-shaped mounting seat commonly and fixedly installed on the inner arc surfaces of two arched side plates, and an electric guide wheel assembly is installed inside the groove-shaped mounting seat. Below both of the electric guide wheel assemblies, there are upper guide rail assemblies, and both of the upper guide rail assemblies are fixedly installed inside the tunnel. At both sides of the lower ends of the two arched side plates, there are support bases installed, and support guide wheel assemblies are installed inside both of the support bases. Below both of the support guide wheel assemblies, there are lower guide rail assemblies, and both of the lower guide rail assemblies are fixedly installed inside the tunnel. Both of the electric guide wheel assemblies are electrically connected to the control box.

[0009] Preferably, the heat dissipation unit includes an arched sealing cover fixedly installed on the side wall of one of the arched side plates. A high-pressure air pump is installed on the outer side wall of the arched sealing cover, and the air delivery end of the high-pressure air pump is communicated with the inside of the arched sealing cover. A plurality of uniformly distributed electric jet heads are fixedly inserted into the top of the arched sealing cover. The high-pressure air pump is electrically connected to the control box.

[0010] Preferably, a plurality of cylinders are fixedly communicated with the side wall of the arched sealing cover, and a piston plate is slidably connected inside each cylinder. A set of springs are fixedly arranged between each piston plate and the side wall of the same-side arched side plate. An iron core is fixedly inserted into the side wall of the piston plate, and an electromagnetic block is arranged on one side of each iron core. Each electromagnetic block is fixedly connected to the same-side arched side plate. An exhaust hole is opened at one end of each cylinder away from the electromagnetic block. Each electromagnetic block is electrically connected to the control box.

[0011] Preferably, a plurality of sets of semiconductor refrigerating rods are fixedly inserted into the side wall of the arched sealing cover, and the refrigerating ends of each of the semiconductor refrigerating rods are arranged inside the arched sealing cover. Each of the semiconductor refrigerating rods is electrically connected to the control box.

[0012] Preferably, insulating seats are installed on the side walls of the two groove-shaped mounting seats facing each other, and a set of power-taking guide wheel assemblies are installed on the side walls of the two insulating seats. Groove-shaped insulating plates are fixedly installed on the end faces of the two upper guide rail assemblies, and a set of power supply guide rails are installed inside the two groove-shaped insulating plates. The external power supply supplies power to the control box through the power supply guide rails and the power-taking guide wheel assemblies.

[0013] Compared with the existing technology, the advantages of a tunnel lining cavity detection device are as follows: 1. Through the mutual cooperation of the arched side plates, arched base plates, control boxes, multiple chain conveying components, multiple moving seats, moving units, multiple heating mechanisms and temperature measuring mechanisms, by designing the arched side plates and arched base plates that fit the tunnel lining, and matching multiple chain conveying components to adjust the positions of the heating mechanisms and temperature measuring mechanisms, it is possible to accelerate the detection efficiency of tunnel lining cavities through multi-point rapid detection, and there is no need to carry out road surface control to affect traffic during detection, which is convenient for the daily inspection and maintenance of the tunnel. At the same time, the cavity is detected through non-destructive heat conduction differences, which is convenient for calculating the size of the cavity, and the use effect is good.

[0014] 2. Through the arranged heat dissipation unit, after heating, the surfaces of each heating position can be appropriately dissipated, and forced convection accelerates the heat diffusion on the lining surface, which can peel off the possible local heat accumulation error during heating, making the temperature field more truly reflect the internal structure.

[0015] 3. Through the mutual cooperation of the cylinder barrel, piston plate, spring, iron core, electromagnetic block and exhaust hole, before heating the lining, the dust and other impurities that may adhere to the lining surface can be removed in advance, avoiding the obstruction of heat conduction by dust and other impurities, thereby affecting the accuracy of cavity detection. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a tunnel lining cavity detection device provided by the present invention; Figure 2 is a schematic diagram of the installation of the arched side plate of a tunnel lining cavity detection device provided by the present invention into the tunnel; Figure 3 is a schematic connection structure diagram of two arched side plates of a tunnel lining cavity detection device provided by the present invention; Figure 4 is a tunnel lining cavity detection device provided by the present invention Figure 1 structural enlarged view of part A therein; Figure 5 is a partial sectional structural schematic diagram of the arched base plate of a tunnel lining cavity detection device provided by the present invention; Figure 6 is a schematic structural diagram of the upper guide rail assembly of a tunnel lining cavity detection device provided by the present invention; Figure 7 is a tunnel lining cavity detection device provided by the present invention Figure 2 structural enlarged view of part B therein; Figure 8It is a schematic diagram of the internal partial structure of the arched sealing cover of a tunnel lining cavity detection device provided by the present invention; Figure 9 It is a tunnel lining cavity detection device provided by the present invention Figure 6 The enlarged view of the structure of part C; Figure 10 It is a three-dimensional structure schematic diagram of the upper guide rail assembly of a tunnel lining cavity detection device provided by the present invention.

[0017] In the figure: 1 arched side plate, 2 arched base plate, 3 control box, 4 chain conveying assembly, 5 moving seat, 6 heating mechanism, 61 pushing electric push rod, 62 heat insulation groove plate, 63 electric heater, 7 temperature measuring mechanism, 71 connecting plate, 72 infrared temperature measuring probe, 8 moving unit, 81 trough-shaped mounting seat, 82 electric guide rail wheel assembly, 83 upper guide rail assembly, 84 support base, 85 support guide rail wheel assembly, 86 lower guide rail assembly, 9 heat dissipation unit, 91 arched sealing cover, 92 high-pressure air pump, 93 electric air jet head, 10 cylinder barrel, 11 piston plate, 12 spring, 13 iron core, 14 electromagnetic block, 15 semiconductor refrigeration bar, 16 insulating seat, 17 power-taking guide rail wheel assembly, 18 trough-shaped insulating plate, 19 power supply guide rail. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0019] Such as Figures 1-10As shown in the figure, a tunnel lining cavity detection device includes two arched side plates 1 that match the tunnel. A plurality of evenly distributed arched base plates 2 are fixedly arranged between the two arched side plates 1. A control box 3 is fixedly installed on the inner arc surfaces of the two arched side plates 1. It further includes: a plurality of chain conveying components 4, which are respectively sleeved on the outer sides of the respective arched base plates 2, and each chain conveying component 4 is installed between the two arched side plates 1. The control box 3 controls the operation of each chain conveying component 4. A plurality of moving seats 5 are respectively arranged on one side of each chain conveying component 4, and each moving seat 5 is slidably connected to the outer arc surfaces of the two arched side plates 1. Each chain conveying component 4 is used to drive the moving seat 5 to move along the outer arc surface of the arched side plate 1. Each moving seat 5 is equipped with a heating mechanism 6 and a temperature measuring mechanism 7. Each heating mechanism 6 includes a top-pushing electric push rod 61 fixedly inserted into the side wall of the moving seat 5, and the movable end of the top-pushing electric push rod 61 is fixedly installed with a heat-insulating groove plate 62. An electric heater 63 is fixedly installed inside the heat-insulating groove plate 62, and the electric heater 63 is electrically connected to the control box 3. The temperature measuring mechanism 7 includes a connecting plate 71 fixedly installed on the side wall of the moving seat 5, and an infrared temperature measuring probe 72 is fixedly inserted at one end of the side wall of the connecting plate 71 away from the moving seat 5. The infrared temperature measuring probe 72 is electrically connected to the control box 3.

[0020] A moving unit 8 is connected to the two arched side plates 1, and the moving unit 8 is used to drive the arched side plates 1 to move along the tunnel. The moving unit 8 includes a trough-shaped mounting seat 81 fixedly installed on the inner arc surfaces of the two arched side plates 1. An electric guide wheel assembly 82 is installed inside the trough-shaped mounting seat 81. Upper guide rail assemblies 83 are arranged below the two electric guide wheel assemblies 82, and the two upper guide rail assemblies 83 are fixedly installed inside the tunnel. Support base seats 84 are installed on both sides of the lower ends of the two arched side plates 1, and support guide wheel assemblies 85 are installed inside the two support base seats 84. Lower guide rail assemblies 86 are arranged below the two support guide wheel assemblies 85, and the two lower guide rail assemblies 86 are fixedly installed inside the tunnel. The two electric guide wheel assemblies 82 are electrically connected to the control box 3. The electric guide wheel assembly 82 includes a plurality of guide rollers and a driving motor for driving the plurality of guide rollers to rotate. It also includes a limit component, a magnetic adsorption fixing component, and a cleaning component for cleaning the track.

[0021] Insulating seats 16 are installed on the side walls of the two trough-shaped mounting seats 81 facing each other, and a set of power-taking guide wheel assemblies 17 are installed on the side walls of the two insulating seats 16. Groove-shaped insulating plates 18 are fixedly installed on the end faces of the two upper guide rail assemblies 83, and a set of power supply guide rails 19 are installed inside the two groove-shaped insulating plates 18. The external power supply supplies power to the control box 3 through the power supply guide rail 19 and the power-taking guide wheel assembly 17. The power-taking guide wheel assembly 17 includes components such as a conductive wheel, an insulating bearing, an elastic member, and a conductive column. The conductive wheel contacts the power supply guide rail 19, and the conductive column contacts the conductive wheel through the elastic member, so as to supply power to the control box 3.

[0022] The heat dissipation unit 9 is installed on the side wall of one of the arched side plates 1 for dissipating heat from the surface of the positions heated by each heating mechanism 6. The heat dissipation unit 9 includes an arched sealing cover 91 fixedly installed on the side wall of one of the arched side plates 1. A high-pressure air pump 92 is installed on the outer side wall of the arched sealing cover 91, and the air output end of the high-pressure air pump 92 is communicated with the inside of the arched sealing cover 91. A plurality of evenly distributed electric jet nozzles 93 are fixedly inserted into the top of the arched sealing cover 91. The high-pressure air pump 92 is electrically connected to the control box 3. An air filter element can be installed at the air suction end of the high-pressure air pump 92 to facilitate filtering of dust in the entering air. The electric jet nozzle 93 is equipped with an electric control valve and is controlled by the control box 3.

[0023] A plurality of cylinders 10 are fixedly communicated with the side wall of the arched sealing cover 91, and a piston plate 11 is slidably connected inside each cylinder 10. A set of springs 12 are fixedly arranged between each piston plate 11 and the side wall of the same-side arched side plate 1. An iron core 13 is fixedly inserted into the side wall of the piston plate 11, and an electromagnetic block 14 is arranged on one side of each iron core 13. Each electromagnetic block 14 is fixedly connected to the same-side arched side plate 1. An exhaust hole is opened at one end of each cylinder 10 away from the electromagnetic block 14. Each electromagnetic block 14 is electrically connected to the control box 3. After the electromagnetic block 14 is powered on, cooperating with the pulling force of the spring 12 on the piston plate 11, the return speed of the piston plate 11 can be effectively increased, thereby increasing the exhaust speed of the air flow.

[0024] A plurality of sets of semiconductor refrigerating rods 15 are fixedly inserted into the side wall of the arched sealing cover 91, and the refrigerating ends of each semiconductor refrigerating rod 15 are arranged inside the arched sealing cover 91. Each semiconductor refrigerating rod 15 is electrically connected to the control box 3, and the heat ends of the semiconductor refrigerating rods 15 are located outside the arched sealing cover 91.

[0025] The operating principle of the present invention is described as follows: Connect the external cable to two sets of power supply guide rails 19, and the power supply guide rails 19 supply power to the control box 3 through the power-taking guide wheel assembly 17. The control box 3 can automatically start the cavity detection of the tunnel lining at regular intervals, and the staff can also send a cavity detection instruction to the control box 3 through a control terminal (such as a computer) (the control box 3 communicates with the computer through a wireless communication module); When the control box 3 starts a cavity detection operation, the control box 3 first makes the high-pressure air pump 92 work, and at the same time controls each electric jet head 93 to remain closed. At this time, the high-pressure air pump 92 sucks in external air and injects it into the arched sealing cover 91. As the air pressure in the arched sealing cover 91 increases, the piston plates 11 inside each cylinder 10 are pushed under the action of the air pressure. At this time, each spring 12 is stretched. After 15 seconds, the control box 3 controls each electric jet head 93 to be energized and opened, and at the same time controls each electromagnetic block 14 to be energized and work. At this time, the air inside the arched sealing cover 91 will be ejected through the electric jet head 93. And under the pulling-back action of the spring 12 and the magnetic attraction of the electromagnetic block 14 on the iron core 13, the piston plate 11 will quickly move back to its original position, thereby increasing the ejection speed of the air flow inside each electric jet head 93. Using the high-speed ejected air flow, dust and other impurities that may adhere to the lining surface can be blown away. After the electric jet head 93 and the electromagnetic block 14 work for 3 seconds, the control box 3 controls the electric jet head 93 to close again and the electromagnetic block 14 to be powered off, and then waits for 15 seconds and repeats the foregoing steps 10 times; After the cleaning work on the impurities on the lining surface is completed, the control box 3 will first control the electric guide wheel assembly 82 to work, so that each heat insulation slot plate 62 moves to each detection point. Subsequently, the control box 3 controls each jacking electric push rod 61 to work regularly. Each jacking electric push rod 61 can push the heat insulation slot plate 62 to move to the lining surface. At the same time, the control box 3 controls the electric heater 63 to work. The heating temperature of the electric heater 63 is 70°C ± 2°C. After heating for 1 minute, the control box 3 controls the electric heater 63 to stop working. At the same time, the infrared temperature measurement probe 72 starts to work, and each chain conveying component 4 starts to work. The chain conveying component 4 can drive the moving seat 5 to move along the outer arc surface of the arched side plate 1. At this time, the infrared temperature measurement probe 72 can scan the temperature around the heating point. At the same time, the control box 3 feeds back the scanning information to the control terminal. Due to the heating of the lining by the electric heater 63, the heat will conduct from the heating point to the surrounding area, thus forming a temperature field around the heating point. The temperature is higher closer to the heating point of the lining. When there are cavities inside the lining, due to the difference in the heat conduction performance of the air inside the cavity and the lining, at this point, the temperature at the cavity position will be significantly higher than the surrounding normal lining area (because the heat conduction coefficient of the air inside the cavity is much lower than that of the lining, heat forms a thermal resistance at the interface between the lining and the cavity and cannot conduct deep into the interior but accumulates on the surface layer, so there will be an obvious temperature difference). Therefore, the position and size of the cavity can be known through the infrared thermal image of the control terminal; Among them, when the control box 3 controls the electric heater 63 to stop working, the control box 3 will first control each jacking electric push rod 61 to move back and reset. Then the control box 3 controls the electric guide wheel assembly 82 to work again, so that the arched side plate 1 moves back and resets, making each electric air jet head 93 move to each detection point again. Subsequently, the control box 3 controls each electric air jet head 93 to be powered on and opened, and controls the high-pressure air pump 92 to work again. After the high-pressure air pump 92 works for 40 seconds, the control box 3 controls the electric air jet head 93 and the high-pressure air pump 92 to stop working. Then it controls the electric guide wheel assembly 82 to drive the heat insulation slot plate 62 to move to each detection point again, and then controls the chain conveying component 4 and the infrared temperature measurement probe 72 to work. By blowing air on the surface of each detection point after heating, the forced convection is used to accelerate the heat diffusion on the lining surface, which can peel off the possible local heat accumulation error during heating and make the temperature field more truly reflect the internal structure; So far, the detection work of a single point is completed. Then the control box 3 drives the moving seat 5 to move to the next detection point through the chain conveying component 4, and repeats the above steps to conduct a full-range cavity detection on the lining position covered by the arched substrate 2. After all the lining positions covered by the arched substrate 2 are detected, the control box 3 controls the electric guide wheel assembly 82 to move to the next position for detection; Among them, the length of a single upper guide rail assembly 83 and a lower guide rail assembly 86 is not greater than 30 meters. Multiple groups of detection devices can be installed in the tunnel. Through multi-point detection, the detection efficiency can be improved, and the detection data can be fed back to the control terminal for convenient subsequent repair.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tunnel lining cavity detection device, comprising two arched side plates (1) matching the tunnel, a plurality of evenly distributed arched base plates (2) are fixedly arranged between the two arched side plates (1), and a control box (3) is fixedly installed on the inner arc surfaces of the two arched side plates (1) together, characterized in that, It further includes: A plurality of chain conveying components (4), which are respectively sleeved on the outer sides of the respective arched substrates (2), and each chain conveying component (4) is installed between the two arched side plates (1), and the control box (3) controls the operation of each chain conveying component (4); A plurality of moving seats (5), which are respectively arranged on one side of each chain conveying component (4), and each moving seat (5) is slidably connected to the outer arc surfaces of the two arched side plates (1). Each chain conveying component (4) is used to drive the moving seat (5) to move along the outer arc surface of the arched side plate (1), and each moving seat (5) is equipped with a heating mechanism (6) and a temperature measuring mechanism (7); A moving unit (8), which is connected to the two arched side plates (1), and the moving unit (8) is used to drive the arched side plates (1) to move along the tunnel; A heat dissipation unit (9), which is installed on the side wall of one of the arched side plates (1), and the heat dissipation unit (9) is used to dissipate heat from the surface of the position heated by each heating mechanism (6).

2. The tunnel lining cavity detection device according to claim 1, characterized in that, Each heating mechanism (6) includes a push electric push rod (61) fixedly inserted into the side wall of the moving seat (5), and the movable end of the push electric push rod (61) is fixedly installed with a heat insulation groove plate (62). An electric heater (63) is fixedly installed inside the heat insulation groove plate (62), and the electric heater (63) is electrically connected to the control box (3).

3. The tunnel lining cavity detection device according to claim 1, characterized in that, The temperature measuring mechanism (7) includes a connecting plate (71) fixedly installed on the side wall of the moving seat (5), and an infrared temperature measuring probe (72) is fixedly inserted at one end of the side wall of the connecting plate (71) away from the moving seat (5). The infrared temperature measuring probe (72) is electrically connected to the control box (3).

4. The tunnel lining cavity detection device according to claim 1, characterized in that, The moving unit (8) includes a channel-shaped mounting seat (81) fixedly installed on the inner arc surfaces of the two arched side plates (1). An electric guide wheel assembly (82) is installed inside the channel-shaped mounting seat (81). Upper guide rail assemblies (83) are arranged below the two electric guide wheel assemblies (82), and the two upper guide rail assemblies (83) are fixedly installed inside the tunnel. Support base seats (84) are installed on both sides of the lower ends of the two arched side plates (1), and support guide wheel assemblies (85) are installed inside the two support base seats (84). Lower guide rail assemblies (86) are arranged below the two support guide wheel assemblies (85), and the two lower guide rail assemblies (86) are fixedly installed inside the tunnel. The two electric guide wheel assemblies (82) are electrically connected to the control box (3).

5. The tunnel lining cavity detection device according to claim 1, characterized in that, The heat dissipation unit (9) includes an arched sealing cover (91) fixedly installed on the side wall of one of the arched side plates (1). A high-pressure air pump (92) is installed on the outer side wall of the arched sealing cover (91), and the air delivery end of the high-pressure air pump (92) is communicated with the inside of the arched sealing cover (91). A plurality of evenly distributed electric jet nozzles (93) are fixedly inserted at the top of the arched sealing cover (91). The high-pressure air pump (92) is electrically connected to the control box (3).

6. The tunnel lining cavity detection device according to claim 5, characterized in that The side wall of the arched sealing cover (91) is fixedly connected to a plurality of cylinder barrels (10), and each cylinder barrel (10) is slidably connected to a piston plate (11), a group of springs (12) are fixedly arranged between each piston plate (11) and the side wall of the arched side plate (1) on the same side, an iron core (13) is fixedly inserted into the side wall of the piston plate (11), and an electromagnetic block (14) is arranged on one side of each iron core (13), each electromagnetic block (14) is fixedly connected to the arched side plate (1) on the same side, and an exhaust hole is opened at one end of each cylinder barrel (10) away from the electromagnetic block (14), and each electromagnetic block (14) is electrically connected to the control box (3).

7. The tunnel lining cavity detection device according to claim 5, characterized in that, A plurality of groups of semiconductor refrigeration rods (15) are fixedly plugged into the side wall of the arched sealing cover (91), and the refrigeration end of each semiconductor refrigeration rod (15) is arranged inside the arched sealing cover (91), and each semiconductor refrigeration rod (15) is electrically connected to the control box (3).

8. The tunnel lining cavity detection device according to claim 4, characterized in that, The side walls of the two groove-shaped mounting seats (81) facing each other are both installed with insulating seats (16), and the side walls of the two insulating seats (16) are both installed with a set of power-taking rail wheel assemblies (17). The end surfaces of the two upper rail assemblies (83) are both fixedly installed with groove-shaped insulating plates (18), and the interiors of the two groove-shaped insulating plates (18) are both installed with a set of power supply rails (19). The external power supply supplies power to the control box (3) through the power supply rails (19) and the power supply rail wheel assemblies (17).

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