CN214585700U - Loop resistance tester - Google Patents

Abstract

The utility model discloses a loop resistance tester, including the tester body, tester body one side outer wall is equipped with receives the line room, it is equipped with the motor to receive line room bottom, be equipped with first gear on the output shaft of motor, it is equipped with the hollow rotation axis to receive between the relative both sides wall of line room, the axial direction of hollow rotation axis is unanimous with the axial direction of motor output shaft, the one end that the hollow rotation axis is close to first gear is equipped with the second gear, first gear passes through the chain with the second gear and is connected; the winding device comprises a hollow rotating shaft, a first baffle plate and a second baffle plate, wherein a winding drum is sleeved on the hollow rotating shaft, the two ends and the middle part of the winding drum are respectively provided with the first baffle plate, and the first baffle plates are vertical to the axial direction of the hollow rotating shaft; the two ends of the hollow rotating shaft are provided with a test wire connecting mechanism; two first wire releasing holes are formed in the top of the wire take-up chamber; the utility model discloses a motor that sets up drives the bobbin and receives around the test wire, need not the manual work and receives the line, has reduced intensity of labour, has improved work efficiency.

Description

Loop resistance tester

Technical Field

The utility model belongs to the technical field of the return circuit resistance detects, specifically be a return circuit resistance tester.

Background

According to the requirements of preventive test regulations of power equipment, the conducting loop resistance of various switch equipment is tested, and the test current of the conducting loop resistance is not less than 100A. Since the contact resistance is increased due to oxidation of the contact surface, poor contact fastening, and the like, and when a large current flows, the temperature of the contact point is increased, which further accelerates the oxidation of the contact surface, further increases the contact resistance, and serious accidents are continuously caused, it is necessary to measure the contact resistance frequently or periodically.

The loop resistance tester is also called a contact resistance tester, and the test current of the loop resistance tester is not less than 100A when the loop resistance tester is used for measuring the conductive loop resistance of various switch devices. The loop resistance tester is a special instrument for measuring contact resistance and loop resistance of switch control equipment, the test current adopts 100A direct current recommended by national standard GB763, the loop resistance or the contact resistance can be directly measured under the condition of 100A, 200A, 300A,400A,500A or 600A current and can be directly displayed and also stored on the instrument, the maximum group number is 100 groups, and the stored data can be communicated with an upper computer through an RS232 interface and uploaded to a computer for storage or printing. The instrument has accurate measurement and stable performance, and is suitable for the requirements of on-site high-voltage switch maintenance and high-voltage switch plant loop resistance test of power and power supply departments.

Chinese utility model patent with publication number CN205898901U discloses a portable loop resistance tester, loop resistance tester includes: shell and loop resistance tester main part, loop resistance tester main part is fixed in the shell, the shell bottom is equipped with the area truckle of stopping, the shell back is fixed with first drum and second drum, first drum with second drum upper end is the opening form, first drum with be equipped with first slider and second slider in the second drum respectively, first pole lower extreme inserts in the first drum with first slider is connected, and first pole upper end is connected with the one end of handle, and second pole lower extreme inserts in the second drum with the second slider is connected, and second pole upper end is connected with the other end of handle.

Although the loop resistance tester is convenient to carry and good in heat dissipation, the test wire for testing is stored everywhere and is easy to lose, and after the test wire is used, the wire needs to be manually wound, so that the working strength is increased, and the speed is low.

Based on this, the utility model designs a return circuit resistance tester to solve above-mentioned problem.

Disclosure of Invention

The utility model aims at the problem that prior art exists, provide a loop resistance tester, solved current loop resistance tester and needed the manual line of receiving of staff, the problem that wastes time and energy.

In order to achieve the above object, the utility model adopts the following technical scheme: a loop resistance tester comprises a tester body, wherein a wire collecting chamber is arranged on the outer wall of one side of the tester body, a motor is arranged at the bottom of the wire collecting chamber, a first gear is arranged on an output shaft of the motor, a hollow rotating shaft is arranged between two opposite side walls of the wire collecting chamber, the axial direction of the hollow rotating shaft is consistent with the axial direction of the output shaft of the motor, a second gear is arranged at one end, close to the first gear, of the hollow rotating shaft, and the first gear is connected with the second gear through a chain; the winding device comprises a hollow rotating shaft, a first baffle plate and a second baffle plate, wherein a winding drum is sleeved on the hollow rotating shaft, the two ends and the middle part of the winding drum are respectively provided with the first baffle plate, and the first baffle plates are vertical to the axial direction of the hollow rotating shaft; the two ends of the hollow rotating shaft are provided with a test wire connecting mechanism; two first wire releasing holes are formed in the top of the wire take-up chamber.

The utility model can store the test wire through the wire collecting chamber, thereby preventing the test wire from losing and avoiding the time delay caused by finding the test wire at four positions when the test wire is used next time; the testing wire is wound through the winding reel, so that the testing wire is prevented from knotting when placed in the containing chamber, and the next use is delayed; the winding reel is arranged in the wire collecting chamber through the arranged hollow rotating shaft, and a conductive rod can be arranged in the hollow rotating shaft; the motor provides power for the winding reel, so that the winding reel can rotate under the driving of electric power to wind up the test wire, and an operator does not need to wind up the test wire manually, so that time and labor are saved; the power of the motor is transmitted to the hollow rotating shaft through the arranged first gear, the second gear and the chain, and then is transmitted to the winding drum through the hollow rotating shaft; the bobbin is divided into two areas by the three first baffles, and two test wires are respectively wound, so that the two wound wires are prevented from being wound together or wound on the hollow rotating shaft to damage the test wires and equipment; through the first unwrapping wire hole that sets up, make the test wire can stretch and accomodate outdoor, detect the sample that awaits measuring, can couple together test wire and this body coupling of tester through the wire connection structure that sets up.

The test wire connecting mechanism comprises two conductive rods, two conductive rings and a spring pressing assembly, one end of each conductive rod is fixed on the end face of the same end of the hollow rotating shaft, the other end of each conductive rod penetrates through the side wall of the hollow rotating shaft and is fixed on the side wall of the winding drum, the spring pressing assembly is installed on the outer wall of the take-up chamber corresponding to the conductive rods, the two conductive rings are installed at one end, close to the conductive rods, of the spring pressing assembly, the positions of the two conductive rings correspond to the positions of the two conductive rods, and the two conductive rings are electrically connected with the tester body; the conducting rod is electrically connected with the testing wire, the conducting ring is electrically connected with the tester body, and the control spring pressing assembly can control the conducting ring to be in contact with the conducting rod, so that the on-off of the testing wire and a circuit of the tester body is controlled.

Furthermore, one end of each of the two current conducting rods, which is fixed on the end face of the hollow rotating shaft, penetrates through the corresponding end face and extends out of the hollow rotating shaft; when the spring pressing assembly controls the conducting ring to be close to the hollow rotating shaft, the conducting ring can be firstly contacted with the conducting rod and is propped by the conducting rod.

The spring pressing assembly comprises a fixing plate, an installation box, a compression spring and a first telescopic motor, the installation box is installed at a position, corresponding to the conductive rod, of the outer wall of the wire take-up chamber, the fixing plate is installed in the installation box in a sliding mode, the fixing plate and the hollow rotating shaft are mutually perpendicular in space, one end of the compression spring is fixed to one side, away from the conductive rod, of the fixing plate, the other end of the compression spring is fixed to the inner wall of the installation box, the two conductive rings are installed on one side, close to the conductive rod, of the fixing plate, the first telescopic motor is installed at a position, corresponding to the installation box, of the inner wall of the wire take-up chamber, and a telescopic rod of the first telescopic motor penetrates through the side wall of the wire take-up chamber and abuts against the fixing plate; the conducting ring fixed on the fixing plate can be pushed to the conducting rod through the arranged compression spring, so that the conducting rod is contacted with the conducting ring, the conducting ring fixed on the fixing plate can be pushed away from the conducting rod through the arranged first telescopic motor, the mounting box is used for mounting the fixing plate and the compression spring, and the fixing plate is used for mounting the conducting ring.

Furthermore, the mounting box is cuboid, and is provided with an opening at one side corresponding to the hollow rotating shaft, the conducting rod can extend into the mounting box, and the conducting ring is easier to contact with the conducting rod.

Furthermore, a clamp chamber is arranged at the top of the wire collecting chamber, and a clamp of the test wire can be placed in the clamp chamber.

Furthermore, a test wire clamping mechanism is arranged at the first pay-off hole and comprises two fixed blocks, two movable blocks, a second baffle, a third baffle, a spring telescopic rod and a second telescopic motor; the second telescopic motor is arranged on the top surface outside the wire take-up chamber and is positioned between the two first wire release holes; the second baffle is arranged on the top surface outside the wire take-up chamber and is perpendicular to the telescopic rod of the second telescopic motor; the third baffle is positioned between the second telescopic motor and the second baffle and is connected with the second baffle through the spring telescopic rod, the telescopic rod of the second telescopic motor is abutted against the third baffle, the two movable blocks are both arranged on one side of the third baffle close to the second telescopic motor, the two fixed blocks are respectively arranged at two first pay-off holes in the top surface of the take-up chamber, and the two first pay-off holes are both positioned between the movable blocks and the fixed blocks corresponding to the two fixed blocks; the testing wire can be clamped by the arranged testing wire clamping mechanism, so that the bobbin is prevented from rolling under the action of gravity in the testing process, and the testing wire is recycled to influence the testing; the spring telescopic rod can push the third baffle to be close to the first wire releasing hole and drive the movable block to be close to the fixed block, so that the test wire passing through the first wire releasing hole is clamped tightly; the second telescopic motor can push the third baffle away from the first wire releasing hole, so that the test wire can be freely wound.

Further, the one side that movable block and fixed block are close to first unwrapping wire hole all is the setting of concave cambered surface, and the area of contact of increase movable block and fixed block and test line increases frictional force, makes the test line can be pressed from both sides more tightly.

Furthermore, a partition board is horizontally arranged in the clamp chamber, and two through holes corresponding to the first wire releasing holes are formed in the partition board; the clamp is separated from the test wire clamping mechanism, so that the clamp is prevented from influencing the test wire clamping mechanism.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model can store the test wire through the wire collecting chamber, thereby preventing the test wire from losing and avoiding the influence on the working efficiency caused by the time delay of searching the test wire;

(2) the utility model discloses a motor, first gear, second gear, chain, cavity rotation axis and bobbin that set up, the motor rotation drives first gear to drive the bobbin rotation through second gear, chain and cavity rotation axis, the rotatory bobbin can be received the test wire and wound up, need not the manual receipts line of operating personnel, has reduced intensity of labour, has improved work efficiency;

(3) the utility model discloses a conducting rod, the conducting ring that set up with the circuit intercommunication of test wire and tester body, through the cooperation of the first flexible motor and the compression spring that set up, can control the contact condition of conducting rod and conducting ring to the break-make of control test wire and tester body circuit only needs to emit the test wire during use, with the test wire with the sample that awaits measuring be connected good can, need not take out the test wire whole from receiving the line indoor, with the circuit connection of tester body, reduced work step, improved work efficiency;

(4) the utility model discloses a fixed block and the movable block that set up can press from both sides the test wire tightly, prevent that the test wire from being received under the effect of gravity and wound or being emitted, avoid influencing the test.

Drawings

FIG. 1 is a schematic diagram of a loop resistance tester in this embodiment;

FIG. 2 is a front view of a loop resistance tester according to the present embodiment;

FIG. 3 is a schematic structural diagram of a test line connection mechanism according to the present embodiment;

FIG. 4 is a schematic structural view of a test line clamping mechanism according to the present embodiment;

FIG. 5 is a cross-sectional view of the conductive ring of the present embodiment;

in the figure: 1. a tester body; 2. a wire take-up chamber; 3. a motor; 4. a first gear; 5. a hollow rotating shaft; 6. a second gear; 7. a chain; 8. a bobbin; 9. a first baffle plate; 10. a first wire releasing hole; 11. a conductive rod; 12. conducting rings; 13. a fixing plate; 14. mounting a box; 15. a compression spring; 16. a first telescoping motor; 17. a clamp chamber; 18. a fixed block; 19. a movable block; 20. a second baffle; 21. a third baffle plate; 22. a spring telescopic rod; 23. a second telescoping motor; 24. a separator.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-5, this embodiment provides a loop resistance tester, including tester body 1, the outer wall of one side of tester body 1 is equipped with receives line room 2, receive line room 2 bottom and be equipped with motor 3, the output shaft of motor 3 sets up along the horizontal direction, the required electric energy of motor 3 start is provided by tester body 1, the controller of tester body 1 can control opening and closing of motor 3, be equipped with first gear 4 on the output shaft of motor 3, it is equipped with hollow rotation axis 5 to receive between the relative both side walls of line room 2, the both ends of hollow rotation axis 5 all are connected with the lateral wall rotary type of receiving line room 2 through insulating bearing, hollow rotation axis 5 is the insulating axle, the axial direction of hollow rotation axis 5 is unanimous with the axial direction of motor 3 output shaft, the one end that hollow rotation axis 5 is close to first gear 4 is equipped with second gear 6, the first gear 4 is connected with the second gear 6 through a chain 7; the winding device is characterized in that a winding drum 8 is sleeved on the hollow rotating shaft 5, first baffles 9 are arranged at two ends and in the middle of the winding drum 8, the first baffles 9 are perpendicular to the axial direction of the hollow rotating shaft 5, the first baffles 9 are circular baffles, and the winding drum 8 is located in the center of the first baffles 9; the two ends of the hollow rotating shaft 5 are provided with a test line connecting mechanism (as shown in figure 3); two first wire releasing holes 10 are formed in the top of the wire collecting chamber 2.

The utility model can store the test wire through the wire collecting chamber 2, thereby preventing the test wire from losing and avoiding the time delay caused by finding the test wire at four positions when the utility model is used next time; the testing wire is wound through the winding reel 8, so that the testing wire is prevented from knotting when placed in the containing chamber, and the next use is delayed; the winding reel 8 is arranged in the wire collecting chamber 2 through the arranged hollow rotating shaft 5, and a conductive rod 11 can be further arranged in the hollow rotating shaft 5; the motor 3 provides power for the bobbin 8, so that the bobbin can rotate under the driving of electric power to wind up the test wire, and an operator does not need to wind up the test wire manually, so that time and labor are saved; the power of the motor 3 is transmitted to the hollow rotating shaft 5 through the arranged first gear 4, the second gear 6 and the chain 7, and then is transmitted to the bobbin 8 through the hollow rotating shaft 5; the bobbin 8 is divided into two areas by three first baffles 9, and two test wires are respectively wound, so that the two wound wires are prevented from being wound together or wound on the hollow rotating shaft 5 to damage the test wires and equipment; through the first unwrapping wire hole 10 that sets up, make the test wire can stretch and accomodate outdoor, detect the sample that awaits measuring, can be connected test wire and tester body 1 through the wire connection structure who sets up.

Specifically, the test line connecting mechanism includes two conducting rods 11, two conducting rings 12, and a spring pressing assembly, where the two conducting rods 11 are both L-shaped, one end of each of the two conducting rods 11 is fixed on an end surface of the same end of the hollow rotating shaft 5, the other end of each of the two conducting rods 11 penetrates through the side wall of the hollow rotating shaft 5 and is fixed on the outer side wall of the bobbin 8, one end of each of the two conducting rods 11 fixed on the bobbin 8 is not separated by the first baffle 9, the spring pressing assembly is installed at a position on the outer wall of the winding chamber 2 corresponding to the conducting rod 11, the two conducting rings 12 are installed at one end of the spring pressing assembly close to the conducting rod 11, the two conducting rings 12 correspond to the two conducting rods 11, the two conducting rings 12 are both electrically connected to the tester body 1, and one conducting ring 12 is located in a ring of the other conducting ring 12 (as shown in fig. 5), the centers of the two conducting rings 12 are overlapped, and when the rotating hollow rotating shaft 5 stops rotating, one end of each conducting rod 11 always just corresponds to the two conducting rings 12; the conducting rod 11 is electrically connected with the test wire, the conducting ring 12 is electrically connected with the tester body 1, and the control spring pressing assembly can control the conducting ring 12 to be in contact with the conducting rod 11, so that the on-off of the circuit of the test wire and the tester body 1 is controlled.

Further, the utility model discloses a four conducting rings 12, wherein are located 5 two conducting rings 12 with the one end of cavity rotation axis are connected with the I + end and the V + end electricity of tester body 1 respectively, two outer conducting rings 12 are connected with the I-end and the V-end electricity of tester body 1 respectively, need two test lines during the test, every test line contains a thick one two wires thin again, wherein thick wire is connected with the conducting rod 11 electricity that the electric current end (be I + and I-end) corresponds, thin wire is connected with the conducting rod 11 electricity that the voltage end (be V + and V-end) corresponds.

Furthermore, one end of each of the two conductive rods 11 fixed on the end face of the hollow rotating shaft 5 penetrates through the corresponding end face and extends out of the hollow rotating shaft 5; when the spring pressing assembly controls the conductive ring 12 to approach the hollow rotating shaft 5, the conductive ring 12 will contact the conductive rod 11 first and be pressed by the conductive rod 11.

Specifically, the spring pressing assembly comprises a fixing plate 13, a mounting box 14, a compression spring 15 and two first telescopic motors 16, the mounting box 14 is mounted at a position corresponding to the conducting rod 11 on the outer wall of the wire winding chamber 2, the fixing plate 13 is slidably mounted in the mounting box 14, the fixing plate 13 and the hollow rotating shaft 5 are perpendicular to each other in space, the fixing plate 13 can slide along the axial direction of the hollow rotating shaft 5, one end of the compression spring 15 is fixed at one side of the fixing plate 13 far away from the conducting rod 11, the other end of the compression spring is fixed with the inner wall of the mounting box 14, the two conducting rings 12 are mounted at one side of the fixing plate 13 close to the conducting rod 11, the first telescopic motors 16 are mounted at a position corresponding to the mounting box 14 on the inner wall of the wire winding chamber 2, telescopic rods of the first telescopic motors 16 penetrate through the side wall of the wire winding chamber 2 and abut against the fixing plate 13, and the number of the first telescopic motors 16 is two, but not limited to two, the first telescopic motor 16 is electrically connected with the controller of the tester body 1; the conducting ring 12 fixed on the fixing plate 13 can be pushed to the conducting rod 11 through the arranged compression spring 15, so that the conducting rod 11 is in contact with the conducting ring 12, the conducting ring 12 fixed on the fixing plate 13 can be pushed away from the conducting rod 11 through the arranged first telescopic motor 16, the mounting box 14 is used for mounting the fixing plate 13 and the compression spring 15, and the fixing plate 13 is used for mounting the conducting ring 12.

Furthermore, the mounting box 14 is rectangular, and one surface corresponding to the hollow rotating shaft 5 is provided with an opening, the conductive rod 11 can extend into the mounting box 14, and the conductive ring 12 is easier to contact with the conductive rod 11.

Further, a clamp chamber 17 is arranged at the top of the wire collecting chamber 2, and a clamp of the test wire can be placed in the clamp chamber 17.

Further, a test wire clamping mechanism (as shown in fig. 4) is arranged at the first wire releasing hole 10, and the test wire clamping mechanism includes two fixed blocks 18, two movable blocks 19, a second baffle 20, a third baffle 21, a spring telescopic rod 22 and a second telescopic motor 23; the second telescopic motor 23 is arranged on the outer top surface of the wire take-up chamber 2 and is positioned between the two first wire releasing holes 10; the second telescopic motor 23 is electrically connected with the controller of the tester body 1, and the second baffle 20 is installed on the top surface outside the wire collecting chamber 2 and is perpendicular to the telescopic rod of the second telescopic motor 23; the third baffle 21 is positioned between the second telescopic motor 23 and the second baffle 20, the third baffle 21 is parallel to the second baffle 20, the telescopic rod of the second telescopic motor 23 is abutted against the third baffle 21, the spring telescopic rod 22 is installed between the third baffle 21 and the second baffle 20, the two movable blocks 19 are both installed on one side of the third baffle 21 close to the second telescopic motor 23, the two fixed blocks 18 are respectively arranged at the two first wire releasing holes 10 on the top surface outside the wire receiving chamber 2, and the two first wire releasing holes 10 are both positioned between the movable blocks 19 and the fixed blocks 18 corresponding to the first wire releasing holes 10; the testing wire can be clamped by the arranged testing wire clamping mechanism, so that the bobbin 8 is prevented from rolling under the action of gravity in the testing process, and the testing wire is recycled to influence the testing; the spring telescopic rod 22 can push the third baffle plate 21 to be close to the first wire releasing hole 10 and drive the movable block 19 to be close to the fixed block 18, so that the test wire passing through the first wire releasing hole 10 is clamped tightly; the second telescopic motor 23 can push the third baffle 21 away from the first wire releasing hole 10, so that the test wire can be freely wound.

Furthermore, the surfaces, close to the first wire releasing hole 10, of the movable block 19 and the fixed block 18 are both concave arc surfaces, so that the contact area between the movable block 19 and the test wire and the contact area between the fixed block 18 and the test wire are increased, and the friction force is increased, so that the test wire can be clamped more tightly.

Furthermore, a partition plate 24 is horizontally arranged in the clamp chamber 17, two through holes corresponding to the first wire releasing holes 10 are formed in the partition plate 24, and an openable top cover is arranged at the top of the clamp chamber 17; the clamp is separated from the test wire clamping mechanism, so that the clamp is prevented from influencing the test wire clamping mechanism.

The working principle is as follows: when the device is used, the device is placed stably, the top cover at the top of the clamp chamber 17 is opened, the controller of the tester body 1 controls the second telescopic motor 23 to start, the telescopic rod of the second telescopic motor 23 extends to push the third baffle 21 to be close to the second baffle 20, the third baffle 21 drives the movable block 19 to be far away from the fixed block 18, and the fixing of a test line is released; starting the motor 3, picking up two test wires in the clamp chamber 17 at the same time, rotating the motor 3, driving the bobbin 8 to rotate together through the first gear 4, the chain 7, the second gear 6 and the hollow rotating shaft 5, enabling the bobbin 8 to rotate, enabling the wound test wires to be unwound, slowly pulling the test wires out of the wire winding chamber 2 until the test wires are unwound, stopping the motor 3, starting the second telescopic motor 23 again, controlling the telescopic rod of the second telescopic motor to be shortened, enabling the third baffle plate 21 to be pushed away from the second baffle plate 20 under the elastic force of the spring telescopic rod 22, enabling the third baffle plate 21 to drive the movable block 19 to be close to the fixed block 18, and fixing the test wires; connecting the unwound test wire with a test sample to be tested, starting a first telescopic motor 16 to control a telescopic rod of the first telescopic motor to shorten, pushing a fixing plate 13 under the action of a compression spring 15, pushing a conducting ring 12 on the fixing plate 13 to be close to a conducting rod 11 until the conducting ring 12 is contacted with the conducting rod 11, and closing the first telescopic motor 16, so far, completing the connection of a circuit between the test sample to be tested and the tester body 1, and operating the tester body 1 to complete the test; after the test is finished, starting the first telescopic motor 16, controlling the telescopic rod to extend, pushing the fixing plate 13 to be far away from the conducting rod 11, driving the conducting ring 12 to be far away from the conducting rod 11 by the fixing plate 13, enabling the conducting ring 12 to be separated from the conducting rod 11, and closing the first telescopic motor 16; the flexible motor 23 of second is started, its telescopic link extension of control, and the flexible motor 23 of second is closed to the clamping state that adds of contact test wire, and starting motor 3 controls its reversal, drives the reversal of bobbin 8, winds the test wire up, winds up and finishes the back, and the flexible motor 23 of control second presss from both sides the test wire tightly, closes the top cap at clamp room 17 top, can with tester body 1 shutdown.

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

Claims (9)

1. A loop resistance tester comprises a tester body and is characterized in that a wire take-up chamber is arranged on the outer wall of one side of the tester body, a motor is arranged at the bottom of the wire take-up chamber, a first gear is arranged on an output shaft of the motor, a hollow rotating shaft is arranged between two opposite side walls of the wire take-up chamber, the axial direction of the hollow rotating shaft is consistent with the axial direction of the output shaft of the motor, a second gear is arranged at one end, close to the first gear, of the hollow rotating shaft, and the first gear is connected with the second gear through a chain; the winding device comprises a hollow rotating shaft, a first baffle plate and a second baffle plate, wherein a winding drum is sleeved on the hollow rotating shaft, the two ends and the middle part of the winding drum are respectively provided with the first baffle plate, and the first baffle plates are vertical to the axial direction of the hollow rotating shaft; the two ends of the hollow rotating shaft are provided with a test wire connecting mechanism; two first wire releasing holes are formed in the top of the wire take-up chamber.

2. The loop resistance tester of claim 1, wherein the test wire connection mechanism comprises two conductive rods, two conductive rings and a spring pressing assembly, one end of each conductive rod is fixed on the end surface of the same end of the hollow rotating shaft, the other end of each conductive rod penetrates through the side wall of the hollow rotating shaft and is fixed on the side wall of the winding drum, the spring pressing assembly is installed on the outer wall of the winding chamber corresponding to the conductive rods, the two conductive rings are installed at one end of the spring pressing assembly close to the conductive rods, the two conductive rings correspond to the two conductive rods in position, and the two conductive rings are electrically connected with the tester body.

3. The loop resistance tester of claim 2, wherein the ends of the two conductive rods fixed to the end surfaces of the hollow rotating shaft extend through the corresponding end surfaces and out of the hollow rotating shaft.

4. The loop resistance tester of claim 2, wherein the spring pressing assembly comprises a fixing plate, a mounting box, a compression spring and a first telescopic motor, the mounting box is installed at a position corresponding to the conducting rod on the outer wall of the wire winding chamber, the fixing plate is slidably installed in the mounting box, the fixing plate and the hollow rotating shaft are perpendicular to each other in space, one end of the compression spring is fixed at one side of the fixing plate far away from the conducting rod, the other end of the compression spring is fixed with the inner wall of the mounting box, two conducting rings are installed at one side of the fixing plate close to the conducting rod, the first telescopic motor is installed at a position corresponding to the mounting box on the inner wall of the wire winding chamber, and a telescopic rod of the first telescopic motor penetrates through the side wall of the wire winding chamber and abuts against the fixing plate.

5. The loop resistance tester of claim 4, wherein the mounting box is rectangular and has an opening at a side corresponding to the hollow rotating shaft.

6. The loop resistance tester of claim 1, wherein a clamping chamber is provided at the top of the wire collection chamber.

7. The loop resistance tester as claimed in claim 6, wherein a test wire clamping mechanism is provided at the first wire-releasing hole, the test wire clamping mechanism comprising two fixed blocks, two movable blocks, a second baffle, a third baffle, a spring telescopic rod and a second telescopic motor; the second telescopic motor is arranged on the top surface outside the wire take-up chamber and is positioned between the two first wire release holes; the second baffle is arranged on the top surface outside the wire take-up chamber and is perpendicular to the telescopic rod of the second telescopic motor; the third baffle is located between flexible motor of second and the second baffle, and pass through the spring telescopic link is connected with the second baffle, the flexible motor of second the telescopic link with third baffle butt, two the movable block all install in the third baffle is close to one side of the flexible motor of second, two the fixed block sets up respectively in receiving two first unwrapping wire hole departments of the outdoor top surface of line, two first unwrapping wire hole all is located rather than between the movable block and the fixed block that correspond.

8. The loop resistance tester of claim 7, wherein the movable block and the fixed block are both provided with concave arc surfaces on the surfaces close to the first wire releasing hole.

9. The loop resistance tester as claimed in claim 7, wherein a partition is horizontally disposed in the clamp chamber, and two through holes corresponding to the first wire-releasing holes are formed in the partition.

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