Tunnel lining cavity detection device

Abstract

The present invention belongs to the field of tunnel detection technology, and in particular relates to a tunnel lining void detection device, comprising two arched side panels that match the tunnel, a plurality of evenly distributed arched base plates fixedly arranged between the two arched side panels, and a control box fixedly installed on the inner arc surfaces of the two arched side panels, and further comprising: a plurality of chain conveyor assemblies, wherein the plurality of chain conveyor assemblies are respectively sleeved on the outside of each of the arched base plates, and each chain conveyor assembly is installed between the two arched side panels, and the control box controls the operation of each chain conveyor assembly. The present invention can speed up the detection efficiency of tunnel lining voids, and does not require road surface control to affect traffic, and is convenient for daily inspection and maintenance. At the same time, it can make the temperature field more realistically reflect the internal structure through heat dissipation, thereby improving detection accuracy. It can also remove impurities on the lining surface in advance to prevent them from hindering heat conduction, thereby ensuring the accuracy of void detection.

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] The tunnel lining is the core of the tunnel structure. The voids behind it are formed due to loose vibration during construction, deformation of the surrounding rock, groundwater erosion, etc., which can easily cause the lining to crack, leak, and even collapse, threatening the structural safety and operation. Carrying out inspections can timely discover hidden diseases, avoid the expansion of accidents, and ensure the long-term and reliable operation of the tunnel.

[0003] At present, there are many methods for lining void detection, such as a tunnel lining void detection device disclosed by patent publication number CN221100621U, which uses a knocking method for void detection, and a tunnel lining non-destructive testing device disclosed by patent publication number CN106442726B, which uses non-contact non-destructive testing for void detection; however, both detection methods are single-point detection. The tunnel lining area is large, and it takes a long time to more completely detect lining voids, and the detection efficiency is relatively low. Secondly, after the subsequent tunnel is opened to traffic, when it is desired to perform lining void detection, road surface control is required, which affects traffic and has poor use effect. Summary of the Invention

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

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: a tunnel lining cavity detection device, comprising two arched side panels matching the tunnel, a plurality of evenly distributed arched base plates fixedly disposed between the two arched side panels, and a control box fixedly mounted on the inner curved surfaces of the two arched side panels, and further comprising:

[0006] A plurality of chain conveyor assemblies are respectively sleeved on the outside of each of the arched base plates, and each chain conveyor assembly is installed between two arched side plates, and the control box controls the operation of each chain conveyor assembly;

[0007] A plurality of movable seats are respectively arranged on one side of each chain conveying assembly, and each movable seat is slidably connected to the outer arc surface of the two arched side plates, each of the chain conveying assemblies is used to drive the movable seat to move along the outer arc surface of the arched side plates, and each of the movable seats is equipped with a heating mechanism and a temperature measuring mechanism;

[0008] A moving unit connected to the two arched side panels, and the moving unit is used to drive the arched side panels to move along the tunnel;

[0009] The heat dissipation unit is installed on the side wall of one of the arched side panels, and is used to dissipate heat from the surface of the position heated by each heating mechanism.

[0010] Preferably, each of the heating mechanisms includes a pushing electric push rod fixedly plugged into the side wall of the movable seat, and the movable end of the pushing electric push rod is fixedly installed with an insulation groove plate, and an electric heater is fixedly installed inside the insulation groove plate, and the electric heater is electrically connected to the control box.

[0011] Preferably, the temperature measuring mechanism includes a connecting plate fixedly mounted on the side wall of the movable seat, and an infrared temperature measuring probe is fixedly mounted on one end of the side wall of the connecting plate away from the movable seat, and the infrared temperature measuring probe is electrically connected to the control box.

[0012] Preferably, the mobile unit includes a groove-type mounting seat which is jointly fixedly mounted on the inner arc surface of the two arched side panels, and an electric guide wheel assembly is installed inside the groove-type mounting seat, an upper guide rail assembly is provided below the two electric guide wheel assemblies, and the two upper guide rail assemblies are fixedly mounted inside the tunnel, support bases are installed on both sides of the lower ends of the two arched side panels, and support guide wheel assemblies are installed inside the two support bases, a lower guide rail assembly is provided below the two support guide wheel assemblies, and the two lower guide rail assemblies are fixedly mounted inside the tunnel, and the two electric guide wheel assemblies are electrically connected to the control box.

[0013] Preferably, the heat dissipation unit includes an arched sealing cover fixedly mounted on the side wall of one of the arched side panels, a high-pressure air pump is mounted on the outer side wall of the arched sealing cover, and the air delivery end of the high-pressure air pump is connected to the interior of the arched sealing cover, a plurality of evenly distributed electric jet heads are fixedly plugged into the top of the arched sealing cover, and the high-pressure air pump is electrically connected to the control box.

[0014] Preferably, the side wall of the arched sealing cover is fixedly connected to a plurality of cylinders, and the interior of each cylinder is slidably connected to a piston plate, a group of springs are fixedly arranged between each piston plate and the side wall of the arched side plate on the same side, 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 arched side plate on the same side, an exhaust hole is opened at the end of each cylinder away from the electromagnetic block, and each electromagnetic block is electrically connected to the control box.

[0015] Preferably, a plurality of semiconductor refrigeration rods are fixedly plugged into the side wall of the arched sealing cover, and the cooling end of each semiconductor refrigeration rod is arranged inside the arched sealing cover, and each semiconductor refrigeration rod is electrically connected to the control box.

[0016] Preferably, the side walls of the two groove-shaped mounting seats facing each other are both installed with insulating seats, and the side walls of the two insulating seats are both installed with a group of power-taking guide rail wheel assemblies, the end faces of the two upper guide rail assemblies are fixedly installed with groove-shaped insulating plates, and the interior of the two groove-shaped insulating plates is installed with a group of power supply rails, and the external power supply supplies power to the control box through the power supply rails and the power supply guide rail wheel assemblies.

[0017] Compared with existing technologies, the advantages of a tunnel lining cavity detection device are:

[0018] 1. Through the mutual cooperation of the arched side panels, arched base plate, control box, multiple chain conveying components, multiple mobile seats, mobile units, multiple heating mechanisms and temperature measuring mechanisms, through the design of the arched side panels and arched base plate that fit the tunnel lining, and the adjustment of the positions of the heating mechanisms and temperature measuring mechanisms with multiple chain conveying components, the detection efficiency of tunnel lining voids can be accelerated through multi-point rapid detection. During the detection, there is no need to carry out road control to affect traffic, which facilitates the daily inspection and maintenance of the tunnel. At the same time, the voids are detected through non-destructive heat conduction differences, which is convenient for measuring the size of the voids and has a good use effect.

[0019] 2. Through the heat dissipation unit, the surface of each heating position can be properly dissipated after heating, and forced convection can accelerate the heat diffusion on the lining surface. The local heat accumulation error that may exist during heating can be removed, so that the temperature field can more truly reflect the internal structure.

[0020] 3. Through the mutual cooperation of the cylinder, piston plate, spring, iron core, electromagnetic block and exhaust hole, dust and other impurities that may be attached to the lining surface can be removed in advance before heating the lining, so as to avoid dust and other impurities hindering the conduction of heat, thereby affecting the accuracy of cavity detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a tunnel lining cavity detection device provided by the present invention;

[0022] Figure 2 This is a schematic diagram of a tunnel lining cavity detection device provided by the present invention after the arched side plate is installed in the tunnel;

[0023] Figure 3 This is a schematic diagram of the connection structure of two arched side plates of a tunnel lining cavity detection device provided by the present invention;

[0024] Figure 4 The present invention provides a tunnel lining cavity detection device Figure 1 A magnified view of the structure of part A;

[0025] Figure 5This is a partial cross-sectional structural diagram of an arched base plate of a tunnel lining cavity detection device provided by the present invention;

[0026] Figure 6 This is a schematic structural diagram of an upper guide rail assembly of a tunnel lining cavity detection device provided by the present invention;

[0027] Figure 7 The present invention provides a tunnel lining cavity detection device Figure 2 A magnified view of the structure of part B;

[0028] Figure 8 This is a schematic diagram of the internal partial structure of an arched sealing cover of a tunnel lining cavity detection device provided by the present invention;

[0029] Figure 9 The present invention provides a tunnel lining cavity detection device Figure 6 A magnified view of the structure of part C;

[0030] Figure 10 It is a schematic diagram of the three-dimensional structure of an upper guide rail assembly of a tunnel lining cavity detection device provided by the present invention.

[0031] In the figure: 1 arched side panel, 2 arched base plate, 3 control box, 4 chain conveyor assembly, 5 movable seat, 6 heating mechanism, 61 push electric push rod, 62 heat insulation groove plate, 63 electric heater, 7 temperature measuring mechanism, 71 connecting plate, 72 infrared temperature measuring probe, 8 movable unit, 81 groove mounting seat, 82 electric guide wheel assembly, 83 upper guide rail assembly, 84 support base, 85 support guide wheel assembly, 86 lower guide rail assembly, 9 heat dissipation unit, 91 arched sealing cover, 92 high-pressure air pump, 93 electric jet head, 10 cylinder, 11 piston plate, 12 spring, 13 iron core, 14 electromagnetic block, 15 semiconductor refrigeration rod, 16 insulating seat, 17 power guide wheel assembly, 18 groove insulating plate, 19 power supply rail. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] like Figures 1-10As shown, a tunnel lining cavity detection device includes two arched side panels 1 that match the tunnel, a plurality of evenly distributed arched base plates 2 are fixedly arranged between the two arched side panels 1, and a control box 3 is fixedly installed on the inner arc surfaces of the two arched side panels 1, and also includes: a plurality of chain conveying assemblies 4, a plurality of chain conveying assemblies 4 are respectively sleeved on the outer side of each arched base plate 2, and each chain conveying assembly 4 is installed between the two arched side panels 1, the control box 3 controls the operation of each chain conveying assembly 4, a plurality of moving seats 5 are respectively arranged on one side of each chain conveying assembly 4, and each moving seat 5 is slidably connected to the outer arc surfaces of the two arched side panels 1, and each chain conveying assembly 4 is connected to the outer arc surfaces of the two arched side panels 1. The strip conveying components 4 are used to drive the movable seat 5 to move along the outer arc surface of the arched side plate 1. Each movable seat 5 is equipped with a heating mechanism 6 and a temperature measuring mechanism 7. Each heating mechanism 6 includes a pushing electric push rod 61 fixedly inserted into the side wall of the movable seat 5, and the movable end of the pushing electric push rod 61 is fixedly installed with an insulation groove plate 62, and the interior of the insulation groove plate 62 is fixedly installed with an electric heater 63, 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 movable seat 5, and an infrared temperature measuring probe 72 is fixedly installed on the end of the side wall of the connecting plate 71 away from the movable seat 5, and the infrared temperature measuring probe 72 is electrically connected to the control box 3.

[0034] The moving unit 8 is connected to the two arched side panels 1, and the moving unit 8 is used to drive the arched side panels 1 to move along the tunnel. The moving unit 8 includes a groove-type mounting seat 81 that is jointly fixedly mounted on the inner arc surface of the two arched side panels 1, and an electric guide wheel assembly 82 is installed inside the groove-type mounting seat 81. Upper guide rail assemblies 83 are provided below the two electric guide wheel assemblies 82, and the two upper guide rail assemblies 83 are fixedly installed inside the tunnel. Support bases 84 are installed on both sides of the lower end of the two arched side panels 1, and support guide wheel assemblies 85 are installed inside the two support bases 84. Lower guide rail assemblies 86 are provided 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 multiple guide rollers and a driving motor for driving the multiple guide rollers to rotate. It also includes a limiting assembly, a magnetic fixing assembly and a cleaning assembly for cleaning the track.

[0035] 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 group of power-taking guide wheel assemblies 17. The end faces of the two upper guide rail assemblies 83 are fixedly installed with groove-shaped insulating plates 18, and the interiors of the two groove-shaped insulating plates 18 are both installed with a group 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-taking guide wheel assemblies 17. The power-taking guide wheel assembly 17 includes conductive conductive wheels, insulating bearings, elastic parts, conductive columns and other components. The conductive wheels are in contact with the power supply rails 19, and the conductive columns are in contact with the conductive wheels through the elastic parts, so that power can be supplied to the control box 3.

[0036] The heat dissipation unit 9 is installed on the side wall of one of the arched side panels 1, and is used to dissipate heat from the surface of the position 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 panels 1. A high-pressure air pump 92 is installed on the outer wall of the arched sealing cover 91, and the air delivery end of the high-pressure air pump 92 is connected to the interior of the arched sealing cover 91. A plurality of evenly distributed electric jet heads 93 are fixedly connected to 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 suction end of the high-pressure air pump 92 to facilitate filtering of dust entering the air. The electric jet head 93 is equipped with an electric control valve, which is controlled by the control box 3.

[0037] The side walls of the arched sealing cover 91 are fixedly connected to multiple cylinders 10, and the interior of each cylinder 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. An exhaust hole is provided at the 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 energized, it cooperates with the spring 12 to exert a pulling force on the piston plate 11, which can effectively increase the return speed of the piston plate 11, thereby increasing the discharge speed of the airflow.

[0038] Multiple groups of semiconductor refrigeration rods 15 are fixedly inserted into the side wall of the arched sealing cover 91, and the cooling end of each semiconductor refrigeration rod 15 is arranged inside the arched sealing cover 91. Each semiconductor refrigeration rod 15 is electrically connected to the control box 3, and the hot end of the semiconductor refrigeration rod 15 is on the outside of the arched sealing cover 91.

[0039] The operating principle of the present invention is described as follows: external cables are connected to two sets of power supply rails 19. The power supply rails 19 supply power to the control box 3 via the power rail wheel assembly 17. The control box 3 can automatically initiate a cavity detection of the tunnel lining at regular intervals. Workers can also send cavity detection instructions to the control box 3 through a control terminal (such as a computer) (the control box 3 communicates with the computer via a wireless communication module).

[0040] When the control box 3 starts a cavity detection operation, the control box 3 will first operate the high-pressure air pump 92 and control each electric jet head 93 to remain in a closed state. At this time, the high-pressure air pump 92 will suck in the air from the outside and inject 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 by 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 operated. At this time, the air inside the arched sealing cover 91 is energized. The air will be ejected through the electric jet head 93, and under the pulling action of the spring 12 and the magnetic attraction of the electromagnetic block 14 to the iron core 13, the piston plate 11 will quickly move back and reset, thereby increasing the ejection speed of the airflow in each electric jet head 93. The high-speed airflow can be used to blow away impurities such as dust that may be attached to the lining surface. 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 cut off the power. Then, after waiting for 15 seconds, the above steps are repeated for 10 times.

[0041] After the impurities on the lining surface are cleaned, the control box 3 will first control the electric guide wheel assembly 82 to work, so that each insulation slot plate 62 moves to each detection point, and then the control box 3 controls each push electric push rod 61 to work at a fixed time. Each push electric push rod 61 can push the 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℃±2℃. After heating for 1 minute, the control box 3 controls the electric heater 63 to stop working, and at the same time controls the infrared temperature probe 72 to start working, and controls each chain conveyor assembly 4 to start working. The chain conveyor assembly 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 probe 72 can heat The temperature around the point is scanned, and the control box 3 feeds back the scanning information to the control terminal. As the electric heater 63 heats the lining, heat is transferred from the heating point to the surrounding area, thereby forming a temperature field around the heating point. The closer to the lining heating point, the higher the temperature. When there is a cavity inside the lining, the thermal conductivity of the air inside the cavity is different from that of the lining. Therefore, at this point, the temperature of the cavity position will be significantly higher than that of the surrounding normal lining area (because the thermal conductivity coefficient of the air inside the cavity is much lower than that of the lining, the heat forms a thermal resistance at the interface between the lining and the cavity, and cannot be transferred to the deep layer but accumulates on the surface, resulting in a significant temperature difference). Therefore, the position and size of the cavity can be known through the infrared thermal image of the control terminal.

[0042] Among them, when the control box 3 controls the electric heater 63 to stop working, the control box 3 will first control each push electric push rod 61 to move back and reset, and then the control box 3 controls the electric guide wheel assembly 82 to work again, so that the arched side panel 1 moves back and resets, so that each electric jet head 93 moves to each detection point again, and then the control box 3 controls each electric jet head 93 to be powered on and turned on, and controls the high-pressure air pump 92 to work again. After the high-pressure air pump 92 has worked for 40 seconds, the control box 3 controls the electric jet head 93 and the high-pressure air pump 92 to stop working, and then controls the electric guide wheel assembly 82 again to drive the insulation slot plate 62 to move to each detection point, and then controls the chain conveying assembly 4 and the infrared temperature measuring probe 72 to work, by blowing air on the surface of each heated detection point, using forced convection to accelerate the heat diffusion of the lining surface, which can remove the local heat accumulation error that may exist during heating, so that the temperature field can more truly reflect the internal structure;

[0043] At this point, the detection work of a single point is completed, and then the control box 3 drives the moving base 5 to move to the next detection point through the chain conveyor assembly 4, and repeats the above steps to perform a full range of void 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;

[0044] Among them, the length of a single upper guide rail assembly 83 and a lower guide rail assembly 86 is no more than 30 meters. Multiple sets of detection devices can be installed in the tunnel to improve detection efficiency through multi-point detection, and the detection data can be fed back to the control terminal to facilitate subsequent repairs.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tunnel lining cavity detection device, comprising two arched side panels (1) matching the tunnel, a plurality of evenly distributed arched base plates (2) fixedly arranged between the two arched side panels (1), and a control box (3) fixedly mounted on the inner arc surfaces of the two arched side panels (1), characterized in that: Also includes: A plurality of chain conveying assemblies (4) are respectively sleeved on the outside of each of the arched base plates (2), and each of the chain conveying assemblies (4) is installed between the two arched side plates (1), and the control box (3) controls the operation of each of the chain conveying assemblies (4); A plurality of movable seats (5) are respectively arranged on one side of each chain conveying assembly (4), and each movable seat (5) is slidably connected to the outer arc surface of the two arched side plates (1), each of the chain conveying assemblies (4) is used to drive the movable seat (5) to move along the outer arc surface of the arched side plates (1), and each of the movable seats (5) is equipped with a heating mechanism (6) and a temperature measuring mechanism (7); A moving unit (8) is connected to the two arched side panels (1), and the moving unit (8) is used to drive the arched side panels (1) to move along the tunnel; A heat dissipation unit (9) is installed on a side wall of one of the arched side panels (1), and the heat dissipation unit (9) is used to dissipate heat from the surface of a location heated by each heating mechanism (6); The heat dissipation unit (9) comprises an arched sealing cover (91) fixedly mounted on the side wall of one of the arched side panels (1); a high-pressure air pump (92) is mounted on the outer side wall of the arched sealing cover (91); a gas delivery end of the high-pressure air pump (92) is connected to the interior of the arched sealing cover (91); a plurality of evenly distributed electric jet heads (93) are fixedly plugged into the top of the arched sealing cover (91); and the high-pressure air pump (92) is electrically connected to the control box (3); The side wall of the arched sealing cover (91) is fixedly connected to a plurality of cylinders (10), and the interior of each cylinder (10) is slidably connected to a piston plate (11), and a group of springs (12) are fixedly arranged between each piston plate (11) and the side wall of the same-side arched side plate (1), and the side wall of the piston plate (11) is fixedly plugged with an iron core (13), and an electromagnetic block (14) is arranged on one side of each iron core (13), and each electromagnetic block (14) is fixedly connected to the same-side arched side plate (1), and an exhaust hole is opened at one end of each cylinder (10) away from the electromagnetic block (14), and each electromagnetic block (14) is electrically connected to the control box (3); A plurality of semiconductor refrigeration rods (15) are fixedly connected to 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).

2. The tunnel lining cavity detection device according to claim 1, characterized in that: Each of the heating mechanisms (6) includes a push electric push rod (61) fixedly plugged into the side wall of the movable seat (5), and a heat insulation slot plate (62) is fixedly installed on the movable end of the push electric push rod (61), and an electric heater (63) is fixedly installed inside the heat insulation slot 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 mounted on the side wall of the movable seat (5), and an infrared temperature measuring probe (72) is fixedly mounted on one end of the side wall of the connecting plate (71) away from the movable seat (5), and 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 mobile unit (8) comprises a groove-shaped mounting seat (81) fixedly mounted on the inner arc surface of the two arched side panels (1), and an electric guide wheel assembly (82) is mounted inside the groove-shaped mounting seat (81), and an upper guide rail assembly (83) is provided below the two electric guide wheel assemblies (82), and the two upper guide rail assemblies (83) are fixedly mounted inside the tunnel, and support bases (84) are installed on both sides of the lower ends of the two arched side panels (1), and support guide wheel assemblies (85) are installed inside the two support bases (84), and lower guide rail assemblies (86) are provided below the two support guide wheel assemblies (85), and the two lower guide rail assemblies (86) are fixedly mounted inside the tunnel, and 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 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 guide rail wheel assemblies (17). The end faces of the two upper guide 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 guide rail wheel assemblies (17).

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