Device convenient for conducting wire direct current resistance test

Abstract

The invention relates to the technical field of resistance testing devices, and discloses a device convenient for conducting wire direct-current resistance testing, which can apply a certain tensile force to a tested conducting wire through the movement of a clamping seat on a guide rail seat before testing, so that the tested conducting wire is in a straightened state; then through the cooperation of the potential conduction seat and the potential end access point, the resistance measuring instrument carries out voltage acquisition on the tested wire, the direct-current resistance on the tested wire is rapidly and accurately calculated, and the resistance value of the tested wire is displayed on the display screen, so that the workload and the human error probability are reduced, and the test efficiency is effectively improved; meanwhile, under the synergistic effect of the tension tester and the clamping mechanism, the accuracy of a test result is greatly improved, and the technical problem that an existing wire direct-current resistance test device is insufficient in test accuracy is solved.

Description

Technical Field

[0001] The invention relates to the technical field of resistance testing devices, and in particular to a device for testing the direct current resistance of a conductor. Background Art

[0002] Conductors are generally made of copper or aluminum and are used to conduct current or heat. The DC resistance of a conductor is an important indicator for determining the quality of its conductive properties. Once inferior conductors are put into use in the power grid, they will cause large power transmission losses, increased conductor temperatures, and short service life. Therefore, before being put into use in the power grid, new conductors must be subjected to a DC resistance test to obtain the DC resistance of the new conductor to determine its quality; this complies with the relevant provisions of GB / T 3048.4-2007 "Test methods for electrical properties of wires and cables - Part 4 - DC resistance test for conductors".

[0003] During the test operation, the existing device for testing the DC resistance of a wire usually applies a pulling force to the tested wire to make the tested wire in a straight state. According to the provisions of the standard, it takes at least 3 days to test the DC resistance of the wire. However, applying a pulling force to the tested wire for a long time will cause the tested wire to be thinned or broken, thereby making the measured result inaccurate. At the same time, during the test operation, the existing test device cannot monitor in real time whether the tested wire is clamped, which will also affect the test result. Summary of the invention

[0004] The invention provides a device for testing the direct current resistance of a conductor, which solves the technical problem that the existing device for testing the direct current resistance of a conductor has insufficient testing accuracy.

[0005] The present invention provides a device for testing the direct current resistance of a conductor, comprising a device body;

[0006] The device body is provided with a bridge fixture, a tension tester and a resistance tester;

[0007] The bridge fixture and the resistance tester are both connected to the measured wire, and the bridge fixture is used to clamp the measured wire and apply tension so that the measured wire is in a straightened state;

[0008] The tension force tester is used to monitor the tension applied by the bridge clamp, and when the tension reaches a preset tension threshold, control the bridge clamp to stop applying the tension;

[0009] The resistance tester is connected to the bridge fixture, and the resistance tester is used to perform resistance test on the tested wire.

[0010] Optionally, the device body includes a base and a support frame mounted on the base;

[0011] A guide rail seat is installed on the top surface of the base, and the bridge fixture is arranged on the guide rail seat;

[0012] A tension force tester is provided on the guide rail seat;

[0013] A resistance tester is arranged on the supporting frame.

[0014] Optionally, the bridge clamp comprises a left bridge clamp, a right bridge clamp, a clamping seat, and a clamping mechanism arranged on the clamping seat for clamping the measured wire;

[0015] The left bridge fixture and the right bridge fixture are respectively located at the left and right ends of the measured wire;

[0016] The clamping seats are arranged on the outer sides of the left bridge clamp and the right bridge clamp, and the clamping seats are slidably arranged on the guide rail seat;

[0017] The left and right ends of the measured wire are respectively fixed in the clamping seat;

[0018] The tension force tester is arranged between the left bridge clamp and the clamping seat or between the right bridge clamp and the clamping seat;

[0019] The left bridge fixture and the right bridge fixture are both provided with potential terminal binding posts, current terminal binding posts and potential terminal access points;

[0020] The effective measurement length of the measured wire is the length between the potential terminal access points on both sides.

[0021] Optionally, a display screen is also provided on the support frame;

[0022] The potential terminal binding post and the current terminal binding post are respectively connected to the potential terminal inlet and the current terminal inlet on the resistance tester through wires;

[0023] A potential conduction seat is movably provided on the top of the potential terminal access point, and a contact piece is installed at a position of the potential conduction seat corresponding to the potential terminal access point;

[0024] The resistance tester is connected to the display screen, and the display screen is used to display the resistance value of the tested conductor.

[0025] Optionally, a slide rail is embedded in the guide rail seat;

[0026] The bottom of the clamping seat is equipped with a sliding block slidably connected to the slide rail;

[0027] Bearing seats are installed at both ends of the guide rail seat;

[0028] The bearing seat is rotatably equipped with a screw rod, and one end of the screw rod is transmission-connected to the driving motor;

[0029] A screw nut is embedded in the clamping seat, and the screw nut is assembled on the screw.

[0030] Optionally, a through hole is provided in the clamping seat;

[0031] Two ends of the measured wire are respectively inserted into the through holes.

[0032] Optionally, the clamping mechanism comprises a first clamping arc plate, a second clamping arc plate, a first pushing groove and a second pushing groove;

[0033] The first semi-barrel-shaped clamping arc plate is slidably assembled in the first pushing groove;

[0034] The second clamping arc plate having a semi-barrel shape is slidably assembled in the second pushing groove;

[0035] The radius of the first clamping arc plate is smaller than the radius of the second clamping arc plate;

[0036] The first push groove and the second push groove are sequentially arranged in the clamping seat from top to bottom, and the horizontal position of the center point of the circle where the second push groove is located is lower than the horizontal position of the center point of the circle where the first push groove is located;

[0037] The tops of the first clamping arc plate and the second clamping arc plate are tangent to each other.

[0038] Optionally, a plurality of pressure sensors are provided on the inner wall of the first clamping arc plate;

[0039] The pressure sensor is used to collect pressure data of the measured conductor compressed by the first clamping arc plate in real time.

[0040] Optionally, the potential terminal access point is a wedge tip with a rounded corner at the tip;

[0041] The bottom of the potential conduction seat is provided with a plurality of grooves;

[0042] A contact piece made of metal material is installed at a position in each of the grooves corresponding to the potential terminal access point.

[0043] Optionally, the top of the potential conduction seat is fixedly connected to the telescopic rod of the telescopic cylinder;

[0044] The cylinder seat of the telescopic cylinder is installed on the crossbeam of the supporting frame, and the telescopic cylinder is used to drive the potential conduction seat to perform linear reciprocating motion up and down.

[0045] It can be seen from the above technical solutions that the present invention has the following advantages:

[0046] The invention provides a device for testing the direct current resistance of a conductor. Before the test, a certain pulling force can be applied to the conductor to be tested by the movement of a clamping seat on a guide rail seat, so that the conductor to be tested is in a straightened state. Then, through the cooperation of a potential conduction seat and a potential terminal access point, a resistance measuring instrument collects voltage from the conductor to be tested, and quickly and accurately calculates the direct current resistance on the conductor to be tested. The resistance value of the conductor to be tested is displayed on a display screen, thereby reducing the workload and the probability of human error, and effectively improving the test efficiency. At the same time, through the coordinated action of a tension force tester and a clamping mechanism, the accuracy of the test result is greatly improved, and the technical problem of insufficient test accuracy in the existing conductor direct current resistance testing device is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0048] Figure 1 This is a schematic diagram of the overall structure of the embodiment of the present invention for facilitating the DC resistance test of a conductor;

[0049] Figure 2 It is a structural schematic diagram of a clamping mechanism according to an embodiment of the present invention;

[0050] The meanings of the reference numerals are as follows:

[0051] 1. Base; 2. Support frame; 3. Left bridge fixture; 31. Left potential terminal access point; 32. Left potential terminal terminal; 33. Left current terminal terminal; 4. Right bridge fixture; 41. Right potential terminal access point; 42. Right potential terminal terminal; 43. Right current terminal terminal; 5. Measured conductor; 6. Guide rail seat; 7. Clamping seat; 71. Bearing seat; 721. First clamping arc plate; 722. Second clamping arc plate; 723. First push groove; 724. Second push groove; 725. First limit plate; 726. Second limit plate; 73. Drive motor; 74. Screw rod; 8. Potential conduction seat; 81. Telescopic cylinder; 9. Resistance tester; 91. First potential terminal inlet; 92. First current terminal inlet; 93. Second current terminal inlet; 94. Second potential terminal inlet; 10. Display screen; 11. Tension force tester. DETAILED DESCRIPTION

[0052] The embodiment of the present invention provides a device for testing the DC resistance of a conductor, which is used to solve the technical problem that the existing device for testing the DC resistance of a conductor has insufficient testing accuracy.

[0053] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, 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 embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] See also Figure 1 and Figure 2 , the present invention provides a device for testing the DC resistance of a conductor, comprising a device body;

[0055] The main body of the device is provided with a bridge fixture, a tension tester 11 and a resistance tester 9;

[0056] The bridge clamp and the resistance tester 9 are both connected to the measured wire, and the bridge clamp is used to clamp the measured wire 5 and apply tension so that the measured wire 5 is in a straightened state;

[0057] The tension tester 11 is used to monitor the tension applied by the bridge clamp, and when the tension reaches a preset tension threshold, the bridge clamp is controlled to stop applying the tension;

[0058] The resistance tester 9 is connected to the bridge fixture, and the resistance tester 9 is used to perform resistance test on the tested wire 5 .

[0059] The device body includes a base 1 and a support frame 2 installed on the base 1;

[0060] A guide rail seat 6 is installed on the top surface of the base 1, and a bridge fixture is arranged on the guide rail seat 6;

[0061] A tension force tester 11 is provided on the guide rail seat 6;

[0062] A resistance tester 9 is arranged on the supporting frame 2 .

[0063] The bridge clamp comprises a left bridge clamp 3, a right bridge clamp 4, a clamping seat 7 and a clamping mechanism arranged on the clamping seat 7 for clamping the measured wire 5;

[0064] The left bridge fixture 3 and the right bridge fixture 4 are respectively located at the left and right ends of the measured wire 5;

[0065] A clamping seat 7 is provided on the outer sides of the left bridge clamp 3 and the right bridge clamp 4, and the clamping seat 7 is slidably arranged on the guide rail seat 6;

[0066] The left and right ends of the measured wire 5 are respectively fixed in the clamping seat 7;

[0067] A tension force tester 11 is provided between the left bridge clamp 3 and the clamping seat 7 or between the right bridge clamp 4 and the clamping seat 7;

[0068] The left bridge fixture 3 and the right bridge fixture 4 are both provided with potential terminal binding posts, current terminal binding posts and potential terminal access points;

[0069] The effective measurement length of the measured conductor 5 is the length between the potential terminal access points on both sides.

[0070] A display screen 10 is also provided on the support frame;

[0071] The potential terminal binding post and the current terminal binding post are respectively connected to the potential terminal inlet and the current terminal inlet on the resistance tester 9 through wires;

[0072] A potential conducting seat 8 is movably provided on the top of the potential terminal access point, and a contact piece is installed at a position of the potential conducting seat 8 corresponding to the potential terminal access point;

[0073] The resistance tester 9 is connected to a display screen 10, and the display screen 10 is used to display the resistance value of the tested wire 5.

[0074] It should be noted that the device body includes a base 1 and a support frame 2 installed on the base 1, and a guide rail seat 6 is installed on the top surface of the base 1;

[0075] A bridge clamp, the bridge clamp arranged on the guide rail seat 6 comprises a left bridge clamp 3, a right bridge clamp 4 and a clamping seat 7, the clamping seat 7 is slidably arranged on the guide rail seat 6; the left bridge clamp 3 and the right bridge clamp 4 are respectively located at the left and right ends of the wire, the outer sides of the left bridge clamp 3 and the right bridge clamp 4 are both provided with clamping seats 7, and the left and right ends of the wire are respectively fixed in the clamping seats 7; a tension force tester 11 is arranged between the left bridge clamp 3 and the clamping seat 7 or between the right bridge clamp 4 and the clamping seat 7; the left bridge clamp 3 and the right bridge clamp 4 are both provided with potential terminal terminals, current terminal terminals and potential terminal access points, and the effective length of the wire is the length between the potential terminal access points on both sides;

[0076] The resistance tester 9, the left potential terminal terminal 32 and the left current terminal terminal 33 are respectively connected to the first potential terminal inlet 91 and the first current terminal inlet 92 on the resistance tester 9 through wires, and the right potential terminal terminal 42 and the right current terminal terminal 43 are respectively connected to the second potential terminal inlet 94 and the second current terminal inlet 93 on the resistance tester 9 through wires, and the resistance tester 9 is installed on the support frame 2;

[0077] A potential conducting seat 8 is movably provided on the top of the potential terminal access point, and a contact piece is installed at a position of the potential conducting seat 8 corresponding to the potential terminal access point;

[0078] Display screen 10: A display screen 10 is also installed on the support frame 2. The display screen 10 is connected to the resistance tester 9 by wires. The display screen 10 is used to display the resistance value of the measured wire.

[0079] The measured conductor 5 is fixed on the guide rail seat 6 by the bridge clamp. Since the clamping seats 7 on both sides are movably connected to the guide rail seat 6, before the test, a certain pulling force can be applied to the measured conductor 5 through the movement of the clamping seats 7 on the guide rail seat 6, so that the measured conductor 5 is in a straightened state. Then, through the cooperation of the potential conduction seat 8 and the potential terminal access point, the resistance measuring instrument collects the voltage of the measured conductor 5, and quickly and accurately calculates the DC resistance on the measured conductor 5. The resistance value of the measured conductor is displayed on the display screen 10, thereby reducing the workload and the probability of human error, and effectively improving the test efficiency.

[0080] In one of the embodiments, a tension tester 11 is provided between the left bridge clamp 3 and the clamping seat 7; before the test, a certain pulling force can be applied to the measured wire 5 through the movement of the clamping seat 7 on the guide rail seat 6, so that the measured wire 5 is in a straightened state. Due to the plasticity of the wire itself, if the pulling force is too large, the wire will be thinned at the least, and the resistance performance will change, making the measured result inaccurate; if it is severe, the wire may be broken and the resistance test cannot be completed. Therefore, it is necessary to use the tension tester 11 to monitor the tension of the clamp. When the tension of the measured wire 5 reaches the preset value, the bridge clamps on both sides stop moving.

[0081] The present invention provides a device for testing the direct current resistance of a conductor. The left bridge clamp 3 and the right bridge clamp 4 are both installed on a guide rail seat 6 by bolts.

[0082] It should be noted that the left bridge fixture 3 and the right bridge fixture 4 are installed on the guide rail seat 6 by bolts; when adjusting the positions of the bridge fixtures on both sides, the bolts are loosened, and the left bridge fixture 3 and the right bridge fixture 4 are placed in place and then bolted. According to different wire specifications and test requirements, the distance between the left potential terminal access point 31 and the right potential terminal access point 41 can be adjusted. When testing wires of the same specification, the distance between the potential terminal access points on both sides is fixed, and the effective measurement length of the wire is between the left potential terminal access point 31 and the right potential terminal access point 41. The left potential terminal access point 31 is electrically connected to the left potential terminal terminal post 32 and the left current terminal terminal post 33, and the right potential access point is electrically connected to the right potential terminal terminal post 42 and the right current terminal terminal post 43. Since the difference in potential between different parts of the wire is voltage, the voltage on the measured wire 5 can be quickly and accurately calculated by collecting the potentials at the left and right points of the measured wire 5. Since the current introduced into the measured wire 5 through the left current terminal terminal post 33 and the right current terminal terminal post 43 is a constant value, the DC resistance of the measured wire 5 can be quickly calculated according to the voltage and current. The DC resistance information can be displayed in real time through the touch screen, thereby reducing the workload and the probability of human error, and effectively improving the test efficiency.

[0083] The present invention provides a device for testing the DC resistance of a conductor, wherein a slide rail is embedded in the guide rail seat 6;

[0084] The bottom of the clamping seat 7 is equipped with a sliding block slidably connected to the slide rail;

[0085] Bearing seats 71 are installed at both ends of the guide rail seat 6;

[0086] The bearing seat 71 is rotatably equipped with a screw rod 74, and one end of the screw rod 74 is transmission-connected to the driving motor 73;

[0087] A screw nut is embedded in the clamping seat 7 , and the screw nut is assembled on the screw 74 .

[0088] A through hole is provided in the clamping seat 7;

[0089] Both ends of the measured wire 5 are respectively inserted into the through holes.

[0090] It should be noted that a slide rail is embedded in the guide rail seat 6, a slider movable along the slide rail is installed at the bottom of the clamping seat 7, bearing seats 71 are installed at both ends of the guide rail seat 6, and a screw rod 74 is rotatably assembled at the bearing seat 71; one end of the screw rod 74 is transmission-connected to the drive motor 73, a screw nut is embedded in the clamping seat 7, and the screw nut is assembled on the screw rod 74, and the clamping seats 7 on both sides are driven to move closer or farther from each other by the drive motor 73. A through hole is opened in the clamping seat 7, and the two ends of the wire are respectively inserted into the through hole.

[0091] See also Figure 1 and Figure 2 The present invention provides a device for testing the DC resistance of a conductor, wherein the clamping mechanism includes a first clamping arc plate 721, a second clamping arc plate 722, a first pushing groove 723 and a second pushing groove 724;

[0092] The semi-barrel-shaped first clamping arc plate 721 is slidably assembled in the first pushing groove 723;

[0093] The semi-barrel-shaped second clamping arc plate 722 is slidably assembled in the second pushing groove 724;

[0094] The radius of the first clamping arc plate 721 is smaller than the radius of the second clamping arc plate 722;

[0095] The first push groove 723 and the second push groove 724 are sequentially arranged in the clamping seat 7 from top to bottom, and the horizontal position of the center point of the circle where the second push groove 724 is located is lower than the horizontal position of the center point of the circle where the first push groove 723 is located;

[0096] The tops of the first clamping arc plate 721 and the second clamping arc plate 722 are tangent to each other.

[0097] The inner wall of the first clamping arc plate 721 is provided with a plurality of pressure sensors, and the pressure sensors are used to collect the pressure data of the measured wire 5 compressed by the first clamping arc plate 721 in real time.

[0098] It should be noted that after the two ends of the wire are placed at the top of the through hole, the first push groove 723 and the second push groove 724 can be pushed by air pressure or hydraulic pressure. One end of the first push groove 723 and the second push groove 724 is connected to gas or hydraulic oil, and the first clamping arc plate 721 and the second clamping arc plate 722 are pushed out from the other side of the first push groove 723 and the second push groove 724. The first clamping arc plate 721 and the second clamping arc plate 722 are both made of insulating material. The first clamping arc plate 721 is moved first, and the The end of the wire is clamped, and the extension length of the first clamping arc plate 721 is different according to the diameter of the wire. A plurality of pressure sensors are provided on the inner wall of the first clamping arc plate 721. The data of the pressure sensors at the contact position with the wire are used to determine whether the wire is clamped. After the first clamping arc plate 721 clamps the wire, in order to prevent the wire from being misplaced, the second clamping arc plate 722 is extended at this time, and the wire and the first clamping arc plate 721 are clamped again after being tangent to the top of the first clamping arc plate 721, so that the two ends of the wire are fixed.

[0099] In addition, the ends of the first clamping arc plate 721 and the second clamping arc plate 722 located in the pushing groove are respectively provided with a first limiting plate 725 and a second limiting plate 726. The function of the limiting plate is to ensure the air tightness between the pushing section of the pushing groove and the clamping arc plate on the one hand, and to limit the movement of the clamping arc plate on the other hand.

[0100] It is worth mentioning that the present invention monitors the tension of the clamp by setting a tension tester 11. When the tension of the tested wire 5 reaches a preset value, the bridge clamps on both sides stop moving, thereby avoiding the situation where the tested wire is thinned or broken. At the same time, the present invention clamps the tested wire 5 through a clamping mechanism. Furthermore, the first semi-barrel-shaped clamping arc plate 721 is first used to press the tested wire 5, and a pressure sensor arranged on the inner wall of the first clamping arc plate 721 is used to judge in real time whether the wire is pressed. After pressing, the second semi-barrel-shaped clamping arc plate 721 is used to press the tested wire 5. The clamping arc plate 722 presses the measured conductor 5 again, thereby preventing the conductor from being misplaced. In addition, the limit plate ensures the air tightness between the pushing section of the pushing groove and the clamping arc plate, while also limiting the movement of the clamping arc plate. Therefore, the structural coordination setting in the clamping mechanism can reduce the factors that easily affect the test results during the test process. In the present invention, the accuracy of the test results is greatly improved through the synergistic effect of the tension force tester 11 and the clamping mechanism, thereby solving the technical problem of insufficient test accuracy in the existing device for testing the DC resistance of the conductor.

[0101] The present invention provides a device for testing the DC resistance of a conductor, wherein the potential terminal access point is a wedge tip with a rounded corner at the tip;

[0102] The bottom of the potential conducting seat 8 is provided with a plurality of grooves;

[0103] A contact piece made of metal is installed at a position in each groove corresponding to the potential terminal access point.

[0104] The potential conducting seat 8 is made of a non-conductive material.

[0105] The top of the potential conducting seat 8 is fixedly connected to the telescopic rod of the telescopic cylinder 81;

[0106] The cylinder seat of the telescopic cylinder 81 is installed on the crossbeam of the supporting frame 2, and the telescopic cylinder 81 is used to drive the potential conduction seat 8 to perform linear reciprocating motion up and down.

[0107] A temperature sensor is provided in the potential conducting seat 8;

[0108] The temperature sensor is used to measure the temperature of the conductor 5 under test.

[0109] It should be noted that, initially, the potential conduction seat 8 is in a non-working state, at which time the potential conduction seat 8 rises, and the two ends of the measured wire 5 are respectively inserted into the clamping seats 7 on both sides and clamped by the clamping mechanism, and the drive motor 73 is started, and the drive motors 73 on both sides act synchronously and drive the screw rods 74 on both sides to rotate, so that the two ends of the measured wire 5 are straightened as the clamping seats 7 on both sides move outward; after the measured wire 5 is in a straightened state, the telescopic cylinder 81 works to press the potential conduction seat 8 downward, so that the contact piece in the groove in the potential conduction seat 8 that contacts the measured wire 5 is connected with the potential end access point of the wire and the metal, and the resistance tester 9 can perform a resistance test on the measured wire 5. Since a temperature sensor is provided in the potential conduction seat 8, the temperature sensor can synchronously collect the temperature of the measured wire 5 body when the potential is collected, and the temperature information and DC resistance information can be displayed in real time through the touch screen.

[0110] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0111] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0112] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for testing the DC resistance of a conductor, characterized in that: The device comprises a main body; The device body is provided with a bridge fixture, a tension tester and a resistance tester; The bridge fixture and the resistance tester are both connected to the measured wire, and the bridge fixture is used to clamp the measured wire and apply tension so that the measured wire is in a straightened state; The tension force tester is used to monitor the tension applied by the bridge clamp, and when the tension reaches a preset tension threshold, control the bridge clamp to stop applying the tension; The resistance tester is connected to the bridge fixture, and the resistance tester is used to perform resistance test on the tested wire.

2. The device for facilitating the DC resistance test of a conductor according to claim 1, characterized in that: The device body comprises a base and a support frame mounted on the base; A guide rail seat is installed on the top surface of the base, and the bridge fixture is arranged on the guide rail seat; A tension force tester is provided on the guide rail seat; A resistance tester is arranged on the supporting frame.

3. The device for facilitating the DC resistance test of a conductor according to claim 2, characterized in that: The bridge clamp comprises a left bridge clamp, a right bridge clamp, a clamping seat, and a clamping mechanism arranged on the clamping seat for clamping the measured wire; The left bridge fixture and the right bridge fixture are respectively located at the left and right ends of the measured wire; The clamping seats are arranged on the outer sides of the left bridge clamp and the right bridge clamp, and the clamping seats are slidably arranged on the guide rail seat; The left and right ends of the measured wire are respectively fixed in the clamping seat; The tension force tester is arranged between the left bridge clamp and the clamping seat or between the right bridge clamp and the clamping seat; The left bridge fixture and the right bridge fixture are both provided with potential terminal binding posts, current terminal binding posts and potential terminal access points; The effective measurement length of the measured wire is the length between the potential terminal access points on both sides.

4. The device for facilitating the DC resistance test of a conductor according to claim 3, characterized in that: The support frame is also provided with a display screen; The potential terminal binding post and the current terminal binding post are respectively connected to the potential terminal inlet and the current terminal inlet on the resistance tester through wires; A potential conduction seat is movably provided on the top of the potential terminal access point, and a contact piece is installed at a position of the potential conduction seat corresponding to the potential terminal access point; The resistance tester is connected to the display screen, and the display screen is used to display the resistance value of the tested conductor.

5. The device for facilitating the DC resistance test of a conductor according to claim 3, characterized in that: The guide rail seat is embedded with a slide rail; The bottom of the clamping seat is equipped with a sliding block slidably connected to the slide rail; Bearing seats are installed at both ends of the guide rail seat; The bearing seat is rotatably equipped with a screw rod, and one end of the screw rod is transmission-connected to the driving motor; A screw nut is embedded in the clamping seat, and the screw nut is assembled on the screw.

6. The device for facilitating the DC resistance test of a conductor according to claim 1, characterized in that: A through hole is provided in the clamping seat; Two ends of the measured wire are respectively inserted into the through holes.

7. The device for facilitating the DC resistance test of a conductor according to claim 3, characterized in that: The clamping mechanism comprises a first clamping arc plate, a second clamping arc plate, a first pushing groove and a second pushing groove; The first semi-barrel-shaped clamping arc plate is slidably assembled in the first pushing groove; The second clamping arc plate having a semi-barrel shape is slidably assembled in the second pushing groove; The radius of the first clamping arc plate is smaller than the radius of the second clamping arc plate; The first push groove and the second push groove are sequentially arranged in the clamping seat from top to bottom, and the horizontal position of the center point of the circle where the second push groove is located is lower than the horizontal position of the center point of the circle where the first push groove is located; The tops of the first clamping arc plate and the second clamping arc plate are tangent to each other.

8. The device for facilitating the DC resistance test of a conductor according to claim 7, characterized in that: The inner wall of the first clamping arc plate is provided with a plurality of pressure sensors; The pressure sensor is used to collect pressure data of the measured conductor compressed by the first clamping arc plate in real time.

9. The device for facilitating the DC resistance test of a conductor according to claim 3, characterized in that: The potential terminal access point is a wedge tip with a rounded tip; The bottom of the potential conduction seat is provided with a plurality of grooves; A contact piece made of metal material is installed at a position in each of the grooves corresponding to the potential terminal access point.

10. The device for facilitating direct current resistance testing of a conductor according to claim 4, characterized in that: The top of the potential conduction seat is fixedly connected to the telescopic rod of the telescopic cylinder; The cylinder seat of the telescopic cylinder is installed on the crossbeam of the supporting frame, and the telescopic cylinder is used to drive the potential conduction seat to perform linear reciprocating motion up and down.

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