CN219245622U - A Bridge Fixture for Measuring Wire Resistance Value - Google Patents

Abstract

The utility model relates to the technical field of cable resistance measurement and discloses a bridge clamp for measuring a wire resistance value, which comprises an operation table, a wiring auxiliary tool, a current clamp and a voltage clamp, wherein the wiring auxiliary tool, the current clamp and the voltage clamp are symmetrically arranged on two sides of the top of the operation table respectively; according to the utility model, when the screw rod rotates in the inner wall of the adjusting groove, the current clamps at the two ends of the inner wall of the adjusting groove can slide close to or separate from the inner wall of the adjusting groove under the cooperation of the inner threaded holes of the voltage clamps, so that the distance between the current clamps and the voltage clamps is adjusted, meanwhile, the wiring auxiliary tool slides in the adjusting groove through the through hole and is positioned through the positioning rod, so that the distance between the two groups of wiring auxiliary tools, the current clamps and the voltage clamps in the bridge clamp can be flexibly adjusted, the resistance values of the split conductors with different lengths can be measured, and the bridge clamp can be suitable for measuring the resistance values of the split conductors with different sizes.

Description

A Bridge Fixture for Measuring Wire Resistance Value

technical field

The utility model relates to the technical field of cable resistance measurement, in particular to a bridge fixture for measuring the resistance value of electric wires.

Background technique

The DC resistance of the split conductor needs to be accurately measured before use. The measuring device is a bridge. When the bridge measures the split conductor, the four-terminal connection method is used to measure the split conductor. The fixture is clamped on the split conductor between the two sets of current fixtures, and the distance between the two sets of voltage fixtures is one meter. A constant current is applied to the split conductor through the current fixture, and the voltage value of the one-meter split conductor is collected by the voltage fixture. Calculate the unit resistance of a segmented conductor.

For example, the publication number of the Chinese patent publication is CN205015371U, a clamp for measuring the resistance value of a large cross-section segmented conductor using an electric bridge. The utility model has a simple structure and can tightly clamp the segmented conductor without changing the shape of the segmented conductor. , so that the current fixture can provide a constant current for the split conductor, ensuring the accuracy of the measurement;

However, in actual use, due to the inability to adjust the distance between the current fixture, the voltage fixture and the wiring aids flexibly, the split conductors to be tested cannot be connected to the fixture and the wiring aids due to different lengths, so that the bridge fixture cannot It is suitable for the measurement of conductors of different lengths, and there are limitations in its use.

Utility model content

The purpose of this utility model is to provide a bridge fixture for measuring the resistance value of electric wires, so as to solve the problem that the distance between the existing bridge fixtures cannot be adjusted flexibly, resulting in that the measured split conductors cannot be connected with the fixture and the wiring aid due to different lengths. The normal wiring between them makes the use of the bridge fixture have limitations.

In order to achieve the above purpose, the utility model provides the following technical solutions: a bridge fixture for measuring the resistance value of electric wires, including an operating table, wiring aids, current fixtures, and voltage fixtures, and the two sides of the top of the operating table are symmetrically arranged with wiring Auxiliary tools, current fixtures, and voltage fixtures, one end of the console is fixedly equipped with an adjustment motor, the output end of the adjustment motor is fixedly connected to a screw rod, and the first adjustment block is fixedly connected to the bottom surface of the current fixture and the voltage fixture , the bottom surface of the wiring aid is fixedly connected with a second adjustment block, the front of the wiring aid is fixedly connected with a positioning rod, and the bottom end of the front of the positioning rod is detachably mounted with a positioning screw.

Preferably, an adjustment slot is provided in the middle of the top surface of the console, a through hole is provided on one side of the wiring aid, and multiple sets of positioning holes are symmetrically and equidistantly provided on both sides of the front of the console.

Preferably, both the current fixture and the voltage fixture slide in the inner wall of the regulating slot through the first regulating block.

Preferably, the current fixture at one end of the console and the side of the voltage fixture are both provided with internal threaded holes, and the screw rod is fitted into the internal threaded holes through peripheral threads.

Preferably, the wiring aid is movably sleeved on the periphery of the screw rod through the through hole.

Preferably, the positioning rod has an L-shaped structure, and the positioning screw is connected to the inner wall of the positioning hole through peripheral threads.

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

When the utility model rotates in the inner wall of the adjusting groove through the screw rod, the current fixture and the voltage fixture at both ends of the inner wall of the adjusting groove cooperate with the internal threaded holes, and can slide closer or separate in the inner wall of the adjusting groove, thereby adjusting the current fixture and the voltage fixture. At the same time, the wiring aid slides in the adjustment slot through the through hole and is positioned by the positioning rod, so that the distance between the two sets of wiring aids, the current clamp, and the voltage clamp in the bridge clamp can be flexibly adjusted. The resistance value of the divided conductors of different lengths is measured, which realizes that the bridge fixture is applicable to the measurement of the resistance value of the divided conductors of multiple sizes, and solves the problem that the distance between the existing bridge fixtures cannot be flexibly adjusted, which causes the measured divided conductors to be Different lengths cannot be connected normally with the fixture and wiring aids, which makes the use of the bridge fixture limited.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the utility model;

Fig. 2 is the utility model side sectional structure schematic diagram;

FIG. 3 is a schematic diagram of a partially enlarged structure at A in FIG. 2 .

In the figure: 1. Operating console; 2. Wiring aids; 3. Current fixture; 4. Voltage fixture; 5. Regulating motor; 6. Regulating slot; 7. Screw rod; 8. First regulating block; 9. Second Adjusting block; 10, through hole; 11, positioning rod; 12, positioning hole; 13, positioning screw.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of them.

Please refer to Figures 1-3, the utility model provides a technical solution: a bridge fixture for measuring the resistance value of electric wires, including console 1, wiring aid 2, current fixture 3, voltage fixture 4, two top of console 1 Wiring aids 2, current fixtures 3, and voltage fixtures 4 are arranged symmetrically on the sides, and an adjusting motor 5 is fixedly installed at one end of the console 1;

The output end of the adjustment motor 5 is fixedly connected with the screw rod 7, the bottom surface of the current fixture 3 and the voltage fixture 4 are both fixedly connected with the first adjustment block 8, the bottom surface of the wiring aid 2 is fixedly connected with the second adjustment block 9, and the front side of the wiring aid 2 is fixed. A positioning rod 11 is connected, and a positioning screw 13 is detachably mounted on the front bottom of the positioning rod 11;

Both the current fixture 3 and the voltage fixture 4 pass through the fixture structure composed of the ball screw slide table and the chuck. The current fixture 3 and the voltage fixture 4 are both equipped with wire posts connected to the bridge terminals, and the wiring aids 2 are both pressed up and down. block and fastening bolts, and the upper and lower pressure blocks are provided with binding posts, the connection mode of the current clamp 3 and the voltage clamp 4 and the wiring aid 2, the two current clamps 3 and the two voltage clamps are connected by the four-terminal connection method The fixture 4 is clamped on the split conductor, and then the two wiring aids 2 are respectively assembled on the split conductor at the outer end of the current fixture 3 to complete the wiring operation of the split conductor. This measurement scheme is all prior art, and will not be repeated here. ;

When the screw rod 7 rotates in the inner wall of the adjustment groove 6, the current clamp 3 and the voltage clamp 4 at both ends of the inner wall of the adjustment groove 6 cooperate with the internal threaded holes, and can slide closer or separate in the inner wall of the adjustment groove 6, thereby adjusting the current. At the same time, the wiring aid 2 slides in the adjustment groove 6 through the through hole 10, and is positioned by the positioning rod 11, so that two groups of wiring aids 2, current clamp 3, The distance between the voltage fixtures 4 can be flexibly adjusted, and the resistance value of the divided conductors of different lengths can be measured, realizing that the bridge fixture is applicable to the measurement of the resistance value of the divided conductors of multiple sizes.

Among them, the middle part of the top surface of the console 1 is provided with an adjustment slot 6, one side of the wiring aid 2 is provided with a through hole 10, and the two sides of the front of the console 1 are provided with multiple sets of positioning holes 12 symmetrically and equidistantly. The L-shaped positioning rod 11 is positioned with the positioning screw 13, so that the two sets of wiring aids 2 can slide and adjust the distance in the adjustment groove 6. With the cooperation of the sliding adjustment of the current clamp 3 and the voltage clamp 4, the divided conductors of different lengths can be adjusted. Conduct wiring to measure the resistance value.

Wherein, both the current clamp 3 and the voltage clamp 4 slide in the inner wall of the adjustment groove 6 through the first adjustment block 8, and the current clamp 3 and the voltage clamp 4 both pass through the clamp structure formed by the ball screw slide table and the chuck, and the current clamp 3 and The voltage fixtures 4 are all provided with wire posts connected to the bridge terminals.

Wherein, the current fixture 3 and the voltage fixture 4 at one end of the console 1 are provided with internally threaded holes, and the screw rod 7 fits in the internally threaded hole through the peripheral thread. When the screw rod 7 rotates in the inner wall of the adjustment groove 6, The current fixture 3 and the voltage fixture 4 at both ends of the inner wall of the adjustment groove 6 cooperate with the internally threaded holes, and can slide closer or separate in the inner wall of the adjustment groove 6, thereby adjusting the distance between the current fixture 3 and the voltage fixture 4.

Wherein, the wiring aid 2 is movably sleeved on the periphery of the screw rod 7 through the through hole 10, the positioning rod 11 is an L-shaped structure, the positioning screw 13 is connected to the inner wall of the positioning hole 12 through the peripheral thread, and the wiring aid 2 passes through the through hole 10. Sliding in the adjustment groove 6, and positioning by the positioning rod 11, the distance between the two sets of wiring aids 2, the current fixture 3, and the voltage fixture 4 in the bridge fixture can be flexibly adjusted, and the resistance of divided conductors of different lengths can be measured. The value realizes that the bridge fixture is applicable to the measurement of the resistance value of split conductors of multiple sizes.

Working principle: When in use, first compare the distance between the divided conductor to be measured and the two sets of voltage fixtures 4. When the length of the divided conductor is greater than the distance between the two sets of voltage fixtures 4, the two ends of the divided conductor can be placed on the two sets of current fixtures 3 and the voltage fixture 4, and the screw rod 7 is driven by the adjustment motor 5 to rotate, so that the two sets of current fixtures 3 and voltage fixtures 4 are separated and slid in the adjustment groove 6 to adjust the distance. Similarly, when the length of the divided conductor is less than two sets of voltage When the distance between the clamps 4, the two sets of current clamps 3 and voltage clamps 4 move closer to adjust the distance in the adjustment groove 6, the split conductors can be clamped horizontally, the bending of the split conductors can be reduced, and errors in the measurement can be avoided. Then, through four The terminal wiring method clamps two current clamps 3 and two voltage clamps 4 on the split conductor, and slides the two sets of wiring aids 2 in the adjustment groove 6 to make the distance between the wiring aids 2 and the current clamps 3 Control it between 8-10 mm, and position the positioning rod 11 through the positioning screw 13 and the positioning hole 12, and finally, use 4 square meters of soft copper wire to firmly connect the terminal of the wiring aid 2 and the terminal of the current clamp 3 The ground is connected together; the current connection terminal of the electric bridge is connected on the two lead posts of the current fixture 3, and the voltage connection terminal of the electric bridge is connected on the two lead posts of the voltage fixture 4, so as to realize the direct current resistance of the split conductor test.

The utility model is used to test the direct current resistance of 2000 square meters of divided conductors by using the auxiliary bridge of the utility model. The test results are: the results of two tests are 0.0115mΩ and 0.0112mΩ, and the measurement floating error is 1.7%. When the utility model is not used for measurement, the two test results are 0.0117mΩ and 0.0125mΩ, and the measurement floating error is 6.4%. It can be seen that the use of the utility model can greatly reduce the measurement fluctuation error of the test result, and the measurement error fully conforming to the national standard is not more than 2%.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principles of the present invention. The scope is defined by the claims appended hereto and their equivalents.

Claims (6)

1. The utility model provides a measure bridge anchor clamps of electric wire resistance, includes operation panel (1), wiring assistance utensil (2), current clamp (3), voltage clamp (4), its characterized in that: the utility model discloses a wire connection auxiliary tool, including operation panel (1), current clamp (3), voltage clamp (4), operation panel (1) one end fixed mounting has accommodate motor (5), accommodate motor (5) output fixedly connected with lead screw (7), current clamp (3) with first regulating block (8) of equal fixedly connected with in voltage clamp (4) bottom surface, utensil (2) bottom surface fixedly connected with second regulating block (9) are assisted in the wiring, positive fixedly connected with locating lever (11) are assisted in the wiring, locating lever (11) openly bottom demountable installation has locating screw (13).

2. The bridge clip for measuring the resistance of an electrical wire of claim 1, wherein: the adjusting device is characterized in that an adjusting groove (6) is formed in the middle of the top surface of the operating platform (1), a through hole (10) is formed in one side of the wiring auxiliary tool (2) in a penetrating mode, and a plurality of groups of positioning holes (12) are formed in two sides of the front surface of the operating platform (1) in a symmetrical and equidistant mode respectively.

3. The bridge clip for measuring the resistance of an electrical wire of claim 2, wherein: the current clamp (3) and the voltage clamp (4) slide in the inner wall of the adjusting groove (6) through a first adjusting block (8).

4. A bridge clip for measuring the resistance of an electrical wire as set forth in claim 3 wherein: the current clamp (3) and one side of the voltage clamp (4) which are positioned at one end of the operating platform (1) are respectively provided with an internal threaded hole in a penetrating mode, and the screw rod (7) is matched in the internal threaded holes through peripheral threads.

5. The bridge clip for measuring wire resistance of claim 4, wherein: the wiring auxiliary tool (2) is movably sleeved on the periphery of the screw rod (7) through a through hole (10).

6. The bridge clip for measuring wire resistance of claim 5, wherein: the positioning rod (11) is of an L-shaped structure, and the positioning screw (13) is connected into the inner wall of the positioning hole (12) in a matched mode through peripheral threads.

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