Resistance tester connecting line take-up and pay-off device

Abstract

The utility model discloses a resistance tester connecting wire take-up and pay-off device which comprises a bottom plate and two first supporting plates installed on one side of the top of the bottom plate, take-up and pay-off rollers used for take-up and pay-off are arranged in the two first supporting plates, and the two ends of the take-up and pay-off rollers penetrate through the first supporting plates and extend out of the first supporting plates. Through the arrangement of the cleaning mechanism, in the process that a servo motor drives a winding and unwinding roller to wind a connecting wire, a driving belt wheel drives a rotating rod and brush rollers to rotate through transmission connection of a second transmission belt, and two brush rollers are driven to rotate through a hollow pipe and a gear on the surface of the rotating rod, so that the connecting wire entering the cleaning box is cleaned; and when the brush roller cleans the connecting line, a water pump pumps water in a water tank, the water is injected into a hollow pipe through communication of a connecting pipe and a shell, and then the water is atomized and sprayed out through an atomizing nozzle, so that the surface of the connecting line can be cleaned, and the situation that impurities on the surface of the connecting line affect the connecting line is avoided.

Description

Technical Field

[0001] This utility model relates to the field of resistance tester cable winding and unwinding technology, specifically a resistance tester cable winding and unwinding device. Background Technology

[0002] Resistance testers are indispensable tools for electrical safety inspections and the final acceptance of grounding projects. They include grounding resistance testers, insulation resistance testers, DC resistance meters, surface resistance testers, and loop resistance testers. Loop resistance meters (transformer loop resistance testers) are suitable for testing the contact resistance of main contacts of high and low voltage switches, and the DC resistance of high and low voltage cable lines. Intelligent loop resistance testers use a 100A constant current output; the maximum output voltage reaches 10V (2-3 times that of conventional instruments), and can use thinner test leads, greatly reducing the workload of on-site testing personnel.

[0003] Currently, when existing testers reel in the connecting wires, the wires are repeatedly wound around at a certain point on the surface of the reel, resulting in the connecting wires getting tangled inside the resistance tester.

[0004] In the prior art, as shown in the authorized announcement number "CN222138393U", a resistance tester connecting wire take-up and take-down device is used. This device utilizes the cooperation between the reciprocating screw and the moving block to drive the connecting wire wound by the sleeve plate to move back and forth, so that the connecting wire can be evenly laid on the surface of the take-up shaft.

[0005] However, existing technologies still have significant shortcomings, such as:

[0006] In the prior art: the device lacks the function of cleaning impurities on the surface of the connecting wire during the winding process; when operating in dusty environments such as construction sites and mines, or in harsh working conditions such as chemical plants and sewage treatment plants where there are humid and corrosive substances, the surface of the connecting wire is very easy to adsorb a large amount of dust, corrosive liquids and other impurities.

[0007] Therefore, during the winding process, these attached impurities act as abrasives, exacerbating the wear of the connecting wires. At the same time, corrosive substances continuously erode the insulation layer and conductor of the connecting wires, accelerating the corrosion process. With the accumulation of usage time, this will not only significantly shorten the service life of the connecting wires, but also greatly increase the risk of safety accidents such as leakage. Utility Model Content

[0008] The purpose of this invention is to provide a cable retraction device for a resistance tester to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a resistance tester connection cable winding and unwinding device, comprising a base plate and two first support plates mounted on one side of its top, wherein the interior of the two first support plates is provided with winding and unwinding rollers for winding and unwinding the cable, both ends of the winding and unwinding rollers penetrate through the first support plates and extend to the outside of the first support plates, and both ends of the winding and unwinding rollers located outside the first support plates are fixedly mounted with drive pulleys, a servo motor is mounted on one side of the first support plate, the output end of the servo motor is fixedly connected to a drive pulley, and a laying mechanism for uniformly winding and unwinding the cable is mounted on one side of the top of the base plate;

[0010] A cleaning mechanism is installed on the top of the base plate for cleaning during the winding and unwinding of the connecting wire;

[0011] The cleaning mechanism includes a cleaning box installed on the top of the base plate. A rotating rod and a hollow tube are respectively installed at the top and bottom of the inner cavity of the cleaning box. One end of the rotating rod and the hollow tube both penetrate the cleaning box and extend to the outside of the cleaning box. Brush rollers are installed on the surface of the rotating rod and the hollow tube.

[0012] Preferably, gears are installed on both the hollow tube and the rotating rod on the side of the inner surface of the cleaning box, and the two gears are meshed together.

[0013] A second driven pulley is fixedly installed at one end of the rotating rod outside the cleaning box. A second transmission belt is wound around the surface of the second driven pulley. The second driven pulley is connected to a driving pulley through the second transmission belt.

[0014] The cleaning box has rectangular openings on both sides for connecting wires to pass through;

[0015] A cleaning component for improving the cleaning effect of connecting wires is installed on one side of the top of the base plate.

[0016] Preferably, the cleaning assembly includes a water tank fixedly installed on one side of the top of the base plate, a housing is installed on one side of the top of the water tank, and one end of the hollow tube located outside the cleaning box passes through the housing and extends into the interior of the housing, and an atomizing nozzle is connected to the brush roller surface on the surface of the hollow tube.

[0017] A water pump is installed on the other side of the top of the water tank. The water inlet of the water pump passes through the water tank and extends into the interior of the water tank. The water outlet of the water pump is connected to a connecting pipe. The end of the connecting pipe away from the water pump is connected to the top of the shell.

[0018] Preferably, a fixing plate is fixedly installed inside the cleaning box at the top and bottom of the rectangular opening, and a slide rail is fixedly installed on the adjacent side of the two fixing plates. A slide seat is slidably installed on the surface of the two slide rails, and a wire-threading block is fixedly installed between the two slide seats. A rubber scraper is installed inside the wire-threading block.

[0019] Preferably, the laying mechanism includes two second support plates fixedly installed on one side of the top of the base plate, and a reciprocating screw is rotatably installed on the top between the two second support plates. One end of the reciprocating screw passes through the second support plate and extends to the outside of the second support plate. A slider is provided on the surface of the reciprocating screw, and a wire hole is opened on the surface of the slider.

[0020] A first driven pulley is fixedly installed at one end of the reciprocating screw located outside the second support plate. A first transmission belt is wound around the surface of the first driven pulley, and the first driven pulley is connected to a driving pulley through the first transmission belt.

[0021] Preferably, each of the two first support plates has a mounting hole at its top, and a lifting block is slidably installed inside each of the two mounting holes. A spring is fixedly installed on the top of each lifting block, and the top of the spring is fixedly connected to the top of the inner cavity of the mounting hole. An installation rod is fixedly installed between the two lifting blocks, and a clamping roller for pressing the connecting line is fixedly installed at the bottom of the installation rod.

[0022] Preferably, a rotary seal for sealing is installed at the penetration point between the hollow tube and the shell, and the rotary seal is made of rubber.

[0023] Preferably, a drain pipe is connected to the bottom of one side of the water tank, and a valve is connected to one end of the drain pipe via a flange.

[0024] Preferably, guide rails are fixedly installed on both sides inside the mounting hole, and sliding grooves adapted to the guide rails are opened on both sides of the lifting block, and the lifting block is slidably connected to the guide rails through the sliding grooves.

[0025] Preferably, a slide rod is fixedly installed between the two second support plates, and one end of the slide rod passes through the slider and is slidably connected to it.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] 1. By utilizing the cleaning mechanism, during the winding process of the connecting wire driven by the servo motor and the take-up and unwinding rollers, the drive pulley drives the rotating rod and brush rollers to rotate via the transmission connection of the second transmission belt. The gears on the surface of the hollow tube and the rotating rod drive the two brush rollers to rotate, cleaning the connecting wires that have entered the cleaning box. At the same time as the brush rollers clean the connecting wires, the water pump draws water from the water tank and injects the water into the hollow tube through the connection between the connecting pipe and the shell. The water is then atomized and sprayed out through the atomizing nozzle. This can clean the surface of the connecting wires and prevent impurities on the surface of the connecting wires from affecting them.

[0028] 2. By utilizing the laying mechanism, when the take-up and unwind rollers are winding the connecting wire, the drive pulley at one end of the take-up and unwind rollers drives the first driven pulley to rotate via the transmission connection of the first transmission belt, which in turn drives the reciprocating screw to rotate. The slider on the surface of the reciprocating screw can slide back and forth on its surface when the reciprocating screw rotates, so as to guide the connecting wire through the wire-passing hole on the surface of the slider and lay the connecting wire evenly on the surface of the take-up and unwind rollers.

[0029] 3. By utilizing the interaction between the threading block and the rubber scraper, the cleaning water on the surface of the connecting wire can be scraped off to prevent excessive moisture from affecting the connecting wire during winding. Furthermore, by utilizing the interaction between the slide rail and the slide block, the threading block can be moved along with the connecting wire as the slider moves, so that the connecting wire can be evenly laid on the surface of the take-up and unwinding rollers. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the cleaning mechanism structure of this utility model;

[0032] Figure 3 This is a partial structural schematic diagram of the cleaning mechanism of this utility model;

[0033] Figure 4 This is a schematic diagram of the laying mechanism of this utility model;

[0034] Figure 5 This utility model Figure 4 A magnified structural diagram of point A in the middle.

[0035] In the diagram: 1. Base plate; 2. First support plate; 3. Take-up and release rollers; 4. Drive pulley; 5. Servo motor; 6. Laying mechanism; 61. Second support plate; 62. Reciprocating screw; 63. Slider; 64. Wire guide hole; 65. First driven pulley; 66. First transmission belt; 67. Mounting hole; 68. Lifting block; 69. Spring; 610. Mounting rod; 611. Pressure roller; 612. Guide rail; 613. Slide rod; 7. Cleaning mechanism; 71. Cleaning box; 72. 73. Rotating rod; 74. Hollow tube; 75. Brush roller; 76. Gear; 77. Rectangular opening; 78. Cleaning assembly; 79. Water tank; 70. Housing; 71. Atomizing nozzle; 72. Water pump; 73. Connecting pipe; 74. Fixing plate; 75. Slide rail; 76. Slide block; 777. Threading block; 78. Rubber scraper; 79. Rotary seal; 700. Drain pipe; 701. Valve; 72. Second driven pulley; 73. Second transmission belt. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Example 1:

[0038] Please see Figures 1-5 This utility model provides a technical solution: a resistance tester connection cable winding and unwinding device, including a base plate 1 and two first support plates 2 installed on one side of its top. The two first support plates 2 are provided with winding and unwinding rollers 3 for winding and unwinding. Both ends of the winding and unwinding rollers 3 pass through the first support plates 2 and extend to the outside of the first support plates 2. Both ends of the winding and unwinding rollers 3 located outside the first support plates 2 are fixedly installed with drive pulleys 4. A servo motor 5 is installed on one side of the first support plate 2. The output end of the servo motor 5 is fixedly connected to a drive pulley 4. A laying mechanism 6 for uniform winding and unwinding is installed on one side of the top of the base plate 1.

[0039] The laying mechanism 6 includes two second support plates 61 fixedly installed on one side of the top of the base plate 1, and a reciprocating screw 62 is rotatably installed on the top between the two second support plates 61. One end of the reciprocating screw 62 passes through the second support plate 61 and extends to the outside of the second support plate 61. A slider 63 is provided on the surface of the reciprocating screw 62, and a wire hole 64 is opened on the surface of the slider 63. A first driven pulley 65 is fixedly installed on the end of the reciprocating screw 62 located outside the second support plate 61. A first transmission belt 66 is wound around the surface of the first driven pulley 65. The first driven pulley 65 and a driving pulley 4 are connected by the first transmission belt 66.

[0040] In this embodiment, when the take-up and unwind roller 3 is winding the connecting wire, the drive pulley 4 at one end of the take-up and unwind roller 3 drives the first driven pulley 65 to rotate through the transmission connection of the first transmission belt 66, and drives the reciprocating screw 62 to rotate. The slider 63 provided on the surface of the reciprocating screw 62 can slide back and forth on its surface when the reciprocating screw 62 rotates, so as to guide the connecting wire through the wire hole 64 opened on the surface of the slider 63 and evenly lay the connecting wire on the surface of the take-up and unwind roller 3.

[0041] Each of the two first support plates 2 has a mounting hole 67 on its top surface, and a lifting block 68 is slidably installed inside each of the two mounting holes 67. A spring 69 is fixedly installed on the top of the lifting block 68, and the top of the spring 69 is fixedly connected to the top of the inner cavity of the mounting hole 67. An installation rod 610 is fixedly installed between the two lifting blocks 68, and a pressing roller 611 for pressing the connecting line is fixedly installed at the bottom of the installation rod 610. Guide rails 612 are fixedly installed on both sides inside the mounting hole 67, and sliding grooves that are adapted to the guide rails 612 are opened on both sides of the lifting block 68. The lifting block 68 is slidably connected to the guide rails 612 through the sliding grooves.

[0042] In this embodiment, during the winding process of the connecting wire, the lifting block 68 uses the elasticity of the spring 69 to keep the pressure roller 611 pressed against the surface of the connecting wire to prevent the connecting wire from loosening during winding and causing the connecting wire roll to come loose.

[0043] A slide rod 613 is fixedly installed between the two second support plates 61, and one end of the slide rod 613 passes through the slider 63 and is slidably connected to it;

[0044] In this embodiment, the slide bar 613 can slide and guide the slider 63 when it moves, so as to prevent the slider 63 from rotating on its own as the reciprocating screw 62 rotates, which would affect the stability of the slider 63's movement.

[0045] Example 2:

[0046] Based on Embodiment 1, this embodiment takes into account that although Embodiment 1 can evenly lay the connecting wire on the surface of the take-up and untake-down roller 3, impurities attached to the surface of the connecting wire can easily affect its winding process in actual use. Therefore, this embodiment uses the following structure to clean the connecting wire during winding.

[0047] A cleaning mechanism 7 is installed on the top of the base plate 1 for cleaning during the winding and unwinding of the connecting wire. The cleaning mechanism 7 includes a cleaning box 71 installed on the top of the base plate 1. A rotating rod 72 and a hollow tube 73 are respectively installed on the top and bottom of the inner cavity of the cleaning box 71. One end of the rotating rod 72 and the hollow tube 73 both pass through the cleaning box 71 and extend to the outside of the cleaning box 71. Brush rollers 74 are installed on the surface of the rotating rod 72 and the hollow tube 73. Gears 75 are installed on one side of the hollow tube 73 and the rotating rod 72 on the inner surface of the cleaning box 71, and the two gears 75 are meshed. A second driven pulley 78 is fixedly installed on the end of the rotating rod 72 outside the cleaning box 71. A second transmission belt 79 is wound around the surface of the second driven pulley 78. The second driven pulley 78 and a driving pulley 4 are connected by the second transmission belt 79.

[0048] The cleaning box 71 has rectangular openings 76 on both sides for the connecting wires to pass through;

[0049] A cleaning component 77 for improving the cleaning effect of connecting wires is installed on one side of the top of the base plate 1;

[0050] The cleaning assembly 77 includes a water tank 771 fixedly installed on one side of the top of the base plate 1. A housing 772 is installed on one side of the top of the water tank 771. One end of a hollow tube 73 located outside the cleaning tank 71 passes through the housing 772 and extends into the interior of the housing 772. An atomizing nozzle 773 is connected to the surface of a brush roller 74 on the surface of the hollow tube 73. A water pump 774 is installed on the other side of the top of the water tank 771. The water inlet of the water pump 774 passes through the water tank 771 and extends into the interior of the water tank 771. The water outlet of the water pump 774 is connected to a connecting pipe 775. The end of the connecting pipe 775 away from the water pump 774 is connected to the top of the housing 772.

[0051] In this embodiment, during the winding process of the connecting wire by the take-up and unwind rollers 3, the drive pulley 4 drives the rotating rod 72 and brush rollers 74 to rotate via the transmission connection of the second transmission belt 79. The hollow tube 73 and the gear 75 on the surface of the rotating rod 72 drive the two brush rollers 74 to rotate, cleaning the connecting wire that has entered the cleaning box 71. At the same time as the brush rollers 74 clean the connecting wire, the water pump 774 draws water from the water tank 771 and injects the water into the hollow tube 73 through the connection between the connecting pipe 775 and the housing 772. The water is then atomized and sprayed out through the atomizing nozzle 773, thereby cleaning the surface of the connecting wire.

[0052] The top and bottom of the cleaning box 71, which is located inside the rectangular opening 76, are fixedly installed with fixing plates 776. Slide rails 777 are fixedly installed on the adjacent side of the two fixing plates 776. Slide seats 778 are slidably installed on the surface of the two slide rails 777. A wire threading block 779 is fixedly installed between the two slide seats 778. A rubber scraper 7701 is installed inside the wire threading block 779.

[0053] In this embodiment, after the connecting wire is cleaned, the rubber scraper 7701 inside the threading block 779 can scrape off the cleaning water on the surface of the connecting wire to avoid excessive moisture when the connecting wire is wound up. Furthermore, by utilizing the cooperation between the slide rail 777 and the slide block 778, the threading block 779 can be moved along with the connecting wire as the sliding block 63 moves, so that the connecting wire can be evenly laid on the surface of the take-up and unwinding roller 3.

[0054] A rotary seal 7702 for sealing is installed at the penetration point between the hollow tube 73 and the housing 772, and the rotary seal 7702 is made of rubber.

[0055] In this embodiment, the penetration between the hollow tube 73 and the housing 772 can be sealed to prevent leakage at the penetration point.

[0056] Furthermore, the aforementioned rotary seal 7702 is a type of dynamic seal. The rotary seal 7702 consists of a slip ring filled with polytetrafluoroethylene and a rubber O-ring that provides elasticity. It is used to seal rods, shafts, pins, rotary joints, and other parts that have rotational or oscillating motion.

[0057] A drain pipe 7703 is connected to the bottom of one side of the water tank 771, and a valve 7704 is connected to one end of the drain pipe 7703 via a flange.

[0058] In the above embodiment, the sewage inside the cleaning box 71 can be discharged, avoiding excessive sewage inside the cleaning box 71 that could contaminate the connecting wires.

[0059] Working principle: When the take-up and unwind roller 3 is winding the connecting wire, the drive pulley 4 at one end of the take-up and unwind roller 3 drives the first driven pulley 65 to rotate through the transmission connection of the first transmission belt 66, and drives the reciprocating screw 62 to rotate. The slider 63 provided on the surface of the reciprocating screw 62 can slide back and forth on its surface when the reciprocating screw 62 rotates, so as to guide the connecting wire through the wire hole 64 opened on the surface of the slider 63 and evenly lay the connecting wire on the surface of the take-up and unwind roller 3.

[0060] During the winding process of the connecting wire by the take-up and unwind rollers 3, the drive pulley 4 drives the rotating rod 72 and brush roller 74 to rotate through the transmission connection of the second transmission belt 79, and drives the two brush rollers 74 to rotate through the hollow tube 73 and the gear 75 on the surface of the rotating rod 72 to clean the connecting wire that has entered the cleaning box 71. At the same time as the brush rollers 74 clean the connecting wire, the water pump 774 draws water from the water tank 771 and injects the water into the hollow tube 73 through the connection pipe 775 and the housing 772. The water is then atomized and sprayed out through the atomizing nozzle 773 to clean the surface of the connecting wire.

[0061] Furthermore, after the connecting wire is cleaned, the rubber scraper 7701 inside the wire threading block 779 can scrape off the cleaning water on the surface of the connecting wire to prevent excessive moisture during winding. In addition, by utilizing the cooperation between the slide rail 777 and the slide block 778, the wire threading block 779 can be moved along with the connecting wire as the sliding block 63 moves, so that the connecting wire can be evenly laid on the surface of the take-up and unwinding roller 3.

[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wire take-up and unwinding device for a resistance tester, comprising a base plate (1) and two first support plates (2) mounted on one side of its top, wherein take-up and unwinding rollers (3) for taking up and unwinding are provided inside the two first support plates (2), both ends of the take-up and unwinding rollers (3) penetrate through the first support plates (2) and extend to the outside of the first support plates (2), and both ends of the take-up and unwinding rollers (3) located outside the first support plates (2) are fixedly mounted with drive pulleys (4), and a servo motor (5) is mounted on one side of the first support plate (2), wherein the output end of the servo motor (5) is fixedly connected to a drive pulley (4), characterized in that: A laying mechanism (6) for evenly unwinding and winding is installed on one side of the top of the base plate (1). A cleaning mechanism (7) is installed on the top of the base plate (1) for cleaning during the winding and unwinding of the connecting wire; The cleaning mechanism (7) includes a cleaning box (71) installed on the top of the base plate (1). A rotating rod (72) and a hollow tube (73) are respectively installed on the top and bottom of the inner cavity of the cleaning box (71). One end of the rotating rod (72) and the hollow tube (73) both penetrate the cleaning box (71) and extend to the outside of the cleaning box (71). A brush roller (74) is installed on the surface of the rotating rod (72) and the hollow tube (73).

2. The resistance tester cable retraction device according to claim 1, characterized in that: The hollow tube (73) and the rotating rod (72) are both equipped with gears (75) on one side of the inner surface of the cleaning box (71), and the two gears (75) are meshed together. The rotating rod (72) is fixedly installed with a second driven pulley (78) at one end outside the cleaning box (71). A second transmission belt (79) is wound around the surface of the second driven pulley (78). The second driven pulley (78) is connected to a driving pulley (4) through the second transmission belt (79). The cleaning box (71) has rectangular openings (76) on both sides for the connecting wires to pass through. A cleaning component (77) for improving the cleaning effect of connecting wires is installed on one side of the top of the base plate (1).

3. The resistance tester cable retraction device according to claim 2, characterized in that: The cleaning assembly (77) includes a water tank (771) fixedly installed on one side of the top of the base plate (1). A housing (772) is installed on one side of the top of the water tank (771). One end of the hollow tube (73) located outside the cleaning box (71) passes through the housing (772) and extends into the interior of the housing (772). The surface of the brush roller (74) on the surface of the hollow tube (73) is connected to an atomizing nozzle (773). A water pump (774) is installed on the other side of the top of the water tank (771). The water inlet of the water pump (774) passes through the water tank (771) and extends into the interior of the water tank (771). The water outlet of the water pump (774) is connected to a connecting pipe (775). The end of the connecting pipe (775) away from the water pump (774) is connected to the top of the shell (772).

4. The resistance tester cable retraction device according to claim 3, characterized in that: The cleaning box (71) is equipped with fixed plates (776) at the top and bottom of the inner side of the rectangular opening (76). Slide rails (777) are fixedly installed on the adjacent side of the two fixed plates (776). Slide seats (778) are slidably installed on the surface of the two slide rails (777). A wire threading block (779) is fixedly installed between the two slide seats (778). A rubber scraper (7701) is installed inside the wire threading block (779).

5. The resistance tester cable retraction device according to claim 1, characterized in that: The laying mechanism (6) includes two second support plates (61) fixedly installed on one side of the top of the base plate (1), and a reciprocating screw (62) is rotatably installed on the top between the two second support plates (61). One end of the reciprocating screw (62) passes through the second support plate (61) and extends to the outside of the second support plate (61). A slider (63) is provided on the surface of the reciprocating screw (62), and a wire hole (64) is opened on the surface of the slider (63). The reciprocating screw (62) is fixedly mounted with a first driven pulley (65) at one end outside the second support plate (61). A first transmission belt (66) is wound around the surface of the first driven pulley (65). The first driven pulley (65) is connected to a driving pulley (4) through the first transmission belt (66).

6. The resistance tester cable retraction device according to claim 5, characterized in that: The top of each of the two first support plates (2) is provided with a mounting hole (67), and a lifting block (68) is slidably installed inside each of the two mounting holes (67). A spring (69) is fixedly installed on the top of the lifting block (68), and the top of the spring (69) is fixedly connected to the top of the inner cavity of the mounting hole (67). An installation rod (610) is fixedly installed between the two lifting blocks (68), and a pressing roller (611) for pressing the connecting line is fixedly installed at the bottom of the installation rod (610).

7. The resistance tester cable retraction device according to claim 3, characterized in that: A rotary seal (7702) for sealing is installed at the penetration point between the hollow tube (73) and the housing (772), and the rotary seal (7702) is made of rubber.

8. The resistance tester cable retraction device according to claim 3, characterized in that: The bottom of one side of the water tank (771) is connected to a drain pipe (7703), and a valve (7704) is connected to one end of the drain pipe (7703) via a flange.

9. A resistance tester cable retraction device according to claim 6, characterized in that: Guide rails (612) are fixedly installed on both sides inside the mounting hole (67). Slide grooves adapted to guide rails (612) are opened on both sides of the lifting block (68). The lifting block (68) is slidably connected to the guide rail (612) through the slide grooves.

10. A resistance tester cable retraction device according to claim 5, characterized in that: A slide rod (613) is fixedly installed between the two second support plates (61), and one end of the slide rod (613) passes through the slider (63) and is slidably connected to it.

Images