CN215180502U - Conductor direct current resistance testing device - Google Patents
Conductor direct current resistance testing device Download PDFInfo
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- CN215180502U CN215180502U CN202121506453.3U CN202121506453U CN215180502U CN 215180502 U CN215180502 U CN 215180502U CN 202121506453 U CN202121506453 U CN 202121506453U CN 215180502 U CN215180502 U CN 215180502U
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Abstract
The utility model relates to a conductor resistance measures technical field, especially relates to a conductor direct current resistance testing arrangement, including the crimping pipe that is used for the base and the inside axial link up of supporting the conductor, the conductor is cut off the tip section that forms middle part section and be located middle part section both ends in electric potential pole department, is connected through the crimping pipe between middle part section and the tip section, and the inside of crimping pipe is filled with conducting material between middle part section and tip section, the both ends of crimping pipe respectively with middle part section and tip section crimping. The crimping can make the middle part section and the end part section break with the paint film of the monofilament of crimping pipe junction for contact between the monofilament is abundant, has realized the abundant contact between each monofilament of conductor potential pole department, and the crimping pipe is inside to be filled conductive material then can make contact between the section of conductor good, makes test current pass through smoothly. Therefore, the accurate voltage value can be measured at the potential pole of the conductor, and the uncertainty caused by the high temperature generated by welding to the resistance measurement of the conductor is avoided.
Description
Technical Field
The utility model relates to a conductor resistance measures technical field, especially relates to a conductor direct current resistance testing arrangement.
Background
At present, the contents of test equipment, sample preparation, test procedures and the like are specified in the standard mainly referring to the national standard GB/T3048.4-2007 for a conductor resistance measurement method. The resistance measuring principle of the conventional conductor is that a testing bridge or other types of resistance testing instruments are adopted, four-end measuring clamps or testing chucks are used for connecting the surfaces of the conductors to be tested, the positions where the conductors are connected with the current end and the voltage end of the resistance testing instruments are respectively used as the current pole and the potential pole of the conductors, the resistance testing instruments output direct current and direct current voltage, the current passes through the conductors and forms a closed loop with the resistance testing instruments, the resistance testing instruments measure the current value flowing through the resistance testing instruments and the voltage value at the potential poles of the conductors, and the resistance value of the conductors can be calculated according to ohm's law.
However, for the enameled conductor, the existence of paint film between the single wires of the conductor can insulate each single wire, and the test current can not be smoothly introduced and the potential voltage can not be accurately measured, so that the test device and method in the above standard are not suitable for the enameled conductor. When aluminum conductors and aluminum alloy conductors are used for direct current resistance measurement, the same problems of enameled conductors can be encountered during measurement due to the fact that the surfaces of aluminum monofilaments are very easy to oxidize. For the conductor with a plurality of monofilaments and insulated monofilaments, the conventional processing mode is to saw off a potential pole of the conductor and then weld the potential pole, so that each strand of monofilament at the potential pole is fully contacted, and the potential pole voltage can be accurately measured. The method has the disadvantages that high temperature is generated during welding, whether the conductor has influence on the measurement of the resistance of the conductor after the conductor is subjected to the high temperature is not researched, and in addition, the welding of the aluminum and the aluminum alloy needs professional technicians to operate, so that the operating threshold is improved.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a conductor direct current resistance testing arrangement can survey accurate magnitude of voltage at conductor potential pole department to overcome prior art's above-mentioned defect.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a conductor direct current resistance testing arrangement, including the base that is used for supporting the conductor and the inside crimping pipe that link up along the axial, the conductor is cut off the tip section that forms middle part section and be located middle part section both ends in electric potential pole department, is connected through the crimping pipe between middle part section and the tip section, and the inside of crimping pipe is filled with conducting material between middle part section and tip section, the both ends of crimping pipe respectively with middle part section and tip section crimping.
Preferably, a voltage lead is arranged on the middle section at a position attached to the end face of the crimping pipe.
Preferably, the conductive material is a conductive glue.
Preferably, the base comprises a fixed support for supporting the middle section and a movable support for supporting the end sections, the movable support being movable relative to the fixed support.
Preferably, the fixed support and the movable support of the base are both provided with clamps, and the clamps support the conductor and clamp and fix the conductor.
Preferably, an insulating spacer is arranged between the clamp and the base and between the clamp and the conductor.
Preferably, the end faces of the conductor are provided with current leads which are connected to all the filaments of the conductor.
Compared with the prior art, the utility model discloses the progress that has showing:
the middle section and the end section which are formed by cutting off the conductor at the potential pole position are connected through the crimping pipe, the two ends of the crimping pipe are respectively crimped with the middle section and the end section, the middle section and the end section of the conductor can be broken through crimping, the single filaments are fully contacted, full contact among the single filaments at the potential pole position of the conductor is achieved, the conductive material filled in the crimping pipe can enable the cross section of the conductor to be well contacted, and test current can smoothly pass through the crimping pipe. Therefore, the utility model discloses can guarantee to survey accurate magnitude of voltage at conductor potential utmost point, compare the mode of rewelding after cutting off conductor potential utmost point among the prior art, the utility model discloses avoid because the welding produces the uncertainty that high temperature brought for conductor resistance measurement, can guarantee conductor resistance measuring result's accuracy.
Drawings
Fig. 1 is a schematic diagram of a conductor direct current resistance testing device according to an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Wherein the reference numerals are as follows:
1 conductor
11 middle section
12 end segment
2 base
21 fixed support
22 Movable support
3 crimping pipe
4 conductive material
5 clamping apparatus
6 insulating spacer
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings. These embodiments are provided only for illustrating the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1 and fig. 2, the present invention provides an embodiment of a device for testing direct current resistance of a conductor. The conductor direct current resistance test apparatus of the present embodiment is used for a direct current resistance test of a conductor 1 (such as an enameled wire stranded conductor for a power cable, an aluminum conductor, an aluminum alloy conductor, and the like) having a plurality of monofilaments and insulated from each other by the presence of a varnish film.
Referring to fig. 1 and 2, the conductor dc resistance test apparatus of the present embodiment includes a base 2 and a crimp tube 3.
Wherein the base 2 is used to support a conductor 1 to be tested. Two potential poles A are preset on the conductor 1, and the positions of the two potential poles A are respectively close to the two ends of the conductor 1. The conductor 1 is cut at the potential pole a to form a middle section 11 and two end sections 12, the two end sections 12 being located at two ends of the middle section 11.
The inside of the crimp tube 3 penetrates in the axial direction, and the crimp tube 3 is preferably a copper crimp tube. The number of the crimping pipes 3 is two, the middle section 11 and the two end sections 12 of the conductor 1 are connected through one crimping pipe 3, the conducting material 4 is filled in the crimping pipe 3 between the middle section 11 and the end sections 12, the conducting material 4 is preferably conducting resin, and two ends of the crimping pipe 3 are crimped with the middle section 11 and the end sections 12 respectively. The crimping can make the middle part section 11 and the tip section 12 of conductor 1 and the paint film of the monofilament of crimping pipe 3 junction break for contact between the monofilament is abundant, has realized the abundant contact between each monofilament of conductor 1 electric potential utmost point A department, and the conducting material 4 of the inside filling of crimping pipe 3 then can make the contact between the section (middle part section 11 and the face that the tip section 12 is relative) of conductor 1 good, makes test current pass through smoothly. Therefore, the conductor direct current resistance testing device of the embodiment can ensure that an accurate voltage value can be measured at the potential pole A of the conductor 1, and compared with a mode of cutting off the potential pole A of the conductor 1 and then welding in the prior art, the conductor direct current resistance testing device of the embodiment avoids uncertainty brought to resistance measurement of the conductor 1 due to high temperature generated by welding, and can ensure accuracy of a resistance measurement result of the conductor 1.
In this embodiment, the conductor 1 is cut at the potential pole a and connected by the crimp tube 3, so that the voltage leads at the potential pole a of the conductor 1 can be led out from the end faces of both ends of the crimp tube 3. Preferably, a voltage lead is led out from the end face of the crimping tube 3 near one end of the middle section 11, that is, referring to fig. 2, the middle section 11 of the conductor 1 is provided with a voltage lead (not shown in the figure) at a position C attached to the end face of the crimping tube 3, the voltage lead is preferably a copper wire wound on the middle section 11 of the conductor 1 close to the end face of the crimping tube 3 at the position C, and the voltage lead is used as a measuring pole of voltage and is connected with a voltage end of a resistance testing instrument during testing. In this embodiment, the potential pole a of the conductor 1 is cut at a position such that the distance between the two crimp tubes 3 is 1 m after the crimp tubes 3 are mounted, i.e., the distance between the two voltage leads (voltage measuring poles) is 1 m.
Referring to fig. 1, in the present embodiment, preferably, the base 2 includes a fixed bracket 21 and two movable brackets 22, the fixed bracket 21 supports the middle section 11 of the conductor 1, the two movable brackets 22 support the two end sections 12 on two sides of the fixed bracket 21, respectively, and the movable brackets 22 are movable relative to the fixed bracket 21. Can conveniently cut off back installation crimping pipe 3 at 1 electric potential utmost point A department of conductor from this, during the use, can place conductor 1 on base 2 earlier, cut off 1 electric potential utmost point A department of conductor again, then can drive tip section 12 and take place the displacement for middle part section 11 relatively through removing movable support 22 to be convenient for install crimping pipe 3 between middle part section 11 and tip section 12. Preferably, the fixed bracket 21 and the movable bracket 22 of the base 2 are both aluminum alloy brackets.
Further, in the present embodiment, the fixed bracket 21 and the movable bracket 22 of the base 2 are both provided with the clamp 5, and the clamp 5 supports the conductor 1 and clamps and fixes the conductor 1. Preferably, two clamps 5 are respectively arranged on the fixing bracket 21 at positions corresponding to the two end portions of the middle section 11 of the conductor 1, and are used for supporting, clamping and fixing the two end portions of the middle section 11; the movable bracket 22 is provided with a clamp 5 at a position corresponding to both ends of the end section 12 of the conductor 1, respectively, for supporting and clamping and fixing both ends of the end section 12. When placing conductor 1 on base 2, conductor 1 is placed on each anchor clamps 5, support conductor 1 in the top of base 2 by each anchor clamps 5, make between conductor 1 and the base 2 spaced apart, can conveniently cut off 1 electric potential utmost point A department of conductor, and it is fixed with 1 centre gripping of conductor by each anchor clamps 5, can prevent that 1 electric potential utmost point A department of conductor from cutting off each monofilament of back and scattering, can fix middle part section 11 and the tip section 12 that the 1 electric potential utmost point A department of conductor formed after cutting off respectively when installation crimping pipe 3, then can fix conductor 1 wholly when the test. Preferably, the inner diameter of the clamp 5 is adjustable, so that the clamp can be applied to conductors 1 with different outer diameter sizes.
Preferably, an insulating spacer 6 is provided between the clamp 5 and the base 2, and an insulating spacer (not shown) is also provided between the clamp 5 and the conductor 1, so that the conductor 1 can be electrically insulated from the base 2 and the clamp 5. The insulating spacer may be made of insulating rubber.
In the present embodiment, since the monofilaments of the conductor 1 are insulated from each other by the presence of the varnish, the test current cannot flow into the conductor 1 from the surface of the conductor 1, and in order to allow the test current to flow smoothly into the monofilaments of the conductor 1, it is preferable to adopt a mode in which the current flows from the end faces of the conductor 1, that is, referring to fig. 1, the end faces at both ends of the conductor 1 are set as current poles B of the conductor 1, and current leads (not shown in the figure) connected to all the monofilaments of the conductor 1 are provided on the end faces at both ends of the conductor 1, the current leads are preferably copper wires connected to all the monofilaments at the end face of the conductor 1, and the current leads draw the current as the current poles and are connected to the current ends of the resistance testing apparatus during the test. When the end face of the conductor 1 is connected with the current lead, the monofilaments at the end faces of the two ends of the conductor 1 can be firstly pulled apart one by one, a paint film on each monofilament is removed completely by polishing, then each monofilament is restored to the original state of the conductor 1, copper wires are wound at the positions where the paint films are removed by polishing the two ends of the conductor 1, and a single copper wire is led out to serve as the current lead. Preferably, the ends of the two ends of the conductor 1 wound with the copper wire are cast with low-melting-point alloy lead, and after cooling, the monofilaments at the two ends of the conductor 1 can be fully contacted with the low-melting-point lead. Therefore, the conductor direct-current resistance testing device of the embodiment can ensure that the testing current smoothly flows into each monofilament of the conductor 1 from the current poles B at the end surfaces of the two ends of the conductor 1.
The conductor direct current resistance testing device of the embodiment is adopted to measure the direct current resistance of the conductor, and specifically comprises the following steps:
firstly, a conductor 1 to be tested is placed on each clamp 5 of a base 2, and the conductor 1 is supported and clamped and fixed above the base 2 by each clamp 5.
And step two, the monofilaments at the end faces of the two ends of the conductor 1 are pulled apart one by one, the paint film on each monofilament is removed completely by polishing, then each monofilament is restored to the original state of the conductor 1, copper wires are wound at the positions where the paint films are removed by polishing the two ends of the conductor 1, and a single copper wire is led out to serve as a current lead.
Cutting off the two potential poles A of the conductor 1, polishing the end face position of the conductor 1 after cutting off, then respectively installing a crimping pipe 3 between the middle section 11 and the two end sections 12, respectively crimping the two ends of the crimping pipe 3 with the middle section 11 and the end sections 12 after filling the conductive material 4 in the crimping pipe 3, wherein the cutting off position of the potential pole A of the conductor 1 ensures that the spacing distance between the two crimping pipes 3 after the installation of the crimping pipe 3 is 1 meter.
And step four, taking the conductor 1 off the clamps 5, polishing the two ends of the conductor 1 to remove the paint film and casting the positions wound with copper wires by using low-melting-point alloy lead, placing the conductor 1 on each clamp 5 of the base 2 again after the casting is finished and cooling, and clamping and fixing the conductor 1 by each clamp 5.
And fifthly, winding a copper wire at a position C, which is attached to the end face of the crimping pipe 3, on the middle section 11 as a voltage lead, wherein the copper wire is tightly attached to the end face of the crimping pipe 3 and is wound on the middle section 11 of the conductor 1.
And step six, connecting the current lead and the voltage lead on the conductor 1 with a current end and a voltage end of the resistance testing instrument respectively.
And step seven, placing the conductor 1 in a room with a constant temperature of 20 ℃ for a set time long enough, and then starting a resistance testing instrument to measure the resistance of the conductor 1.
This completes the primary test of the dc resistance of the conductor 1.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a conductor direct current resistance testing arrangement, characterized in that, including base (2) and inside along the crimping pipe (3) that the axial link up that are used for supporting conductor (1), conductor (1) is cut off in electric potential utmost point (A) department and is formed middle part section (11) and be located the tip section (12) at middle part section (11) both ends, middle part section (11) with pass through between tip section (12) crimping pipe (3) are connected, the inside of crimping pipe (3) is in middle part section (11) with it has conducting material (4) to fill between tip section (12), the both ends of crimping pipe (3) respectively with middle part section (11) with tip section (12) crimping.
2. The conductor direct current resistance testing device according to claim 1, characterized in that a voltage lead is provided on the middle section (11) at a position abutting against an end face of the crimp tube (3).
3. The conductor direct current resistance test device according to claim 1, characterized in that the conductive material (4) is a conductive adhesive.
4. The conductor direct current resistance test device according to claim 1, characterized in that the base (2) comprises a fixed support (21) supporting the middle section (11) and a movable support (22) supporting the end section (12), the movable support (22) being movable relative to the fixed support (21).
5. The conductor direct current resistance testing device according to claim 4, characterized in that a clamp (5) is arranged on each of the fixed support (21) and the movable support (22) of the base (2), and the clamp (5) supports the conductor (1) and clamps and fixes the conductor (1).
6. The conductor direct current resistance testing device according to claim 5, characterized in that insulating spacers (6) are arranged between the clamp (5) and the base (2) and between the clamp (5) and the conductor (1).
7. The conductor direct current resistance testing device according to claim 1, characterized in that the end face of the conductor (1) is provided with a current lead wire connected with all monofilaments of the conductor (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121506453.3U CN215180502U (en) | 2021-07-02 | 2021-07-02 | Conductor direct current resistance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121506453.3U CN215180502U (en) | 2021-07-02 | 2021-07-02 | Conductor direct current resistance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215180502U true CN215180502U (en) | 2021-12-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121506453.3U Active CN215180502U (en) | 2021-07-02 | 2021-07-02 | Conductor direct current resistance testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215180502U (en) |
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2021
- 2021-07-02 CN CN202121506453.3U patent/CN215180502U/en active Active
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