CN211014355U - Cable terminal withstand voltage test leading-out device - Google Patents
Cable terminal withstand voltage test leading-out device Download PDFInfo
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- CN211014355U CN211014355U CN201921265642.9U CN201921265642U CN211014355U CN 211014355 U CN211014355 U CN 211014355U CN 201921265642 U CN201921265642 U CN 201921265642U CN 211014355 U CN211014355 U CN 211014355U
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- 238000012360 testing method Methods 0.000 title claims abstract description 89
- 239000000463 material Substances 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229920001971 elastomer Polymers 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 229920002943 EPDM rubber Polymers 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model provides a cable terminal pressure test leading-out device, which comprises a connecting terminal connected with a cable terminal, and a high-voltage lead which is led out by the connecting terminal and is connected with the pressure test device; the connecting terminal comprises a test sleeve connected with the cable terminal in a wiring mode and an insulating layer arranged outside the test sleeve. When the cable terminal carries out withstand voltage test, be connected with cable terminal through eduction gear, eduction gear's connecting terminal is connected conduction electric power by its test sleeve pipe and cable terminal, the outside insulating layer that sets up of test sleeve pipe protects connecting terminal and cable terminal's link insulation, by high-voltage lead wire connection test sleeve pipe, and draw cable terminal's electric power out by the cubical switchboard, thereby need not the position at mobile cable terminal, need not to demolish the cubical switchboard shutoff, can realize cable terminal and withstand voltage test device's connection, reduce the use of manpower and materials, reduce the mechanical damage risk to cable and cable terminal, reduce the experimental degree of difficulty of cable terminal.
Description
Technical Field
The utility model relates to a power equipment technical field, more specifically say, relate to a cable termination withstand voltage test extraction element.
Background
With the high-speed development of the power industry, the cable lines with low failure rate and low operation and maintenance cost are applied more and more widely in cities, and the proportion of the cable lines is increased year by year. According to the operation and maintenance experience of the cable terminal, more than half of the power cable line faults occur at the cable accessory part, wherein the cable faults in the station are mainly concentrated at the cable terminal in the switch cabinet.
The alternating current voltage withstand test is an important test item for determining whether the power cable can be put into operation, and the alternating current voltage withstand test mainly inspects the insulation performance of a cable terminal, so that objective evaluation and analysis can be carried out on a test result only if the integrity of the cable terminal is ensured in the alternating current voltage withstand test process of the cable. 135 loops of 35kV cable lines, 270 groups of cable terminals, 441 loops of 10kV cable lines and 882 groups of cable terminals in a cable operation and inspection room, routine tests are performed on cables in a substation every 4-5 years, cable outgoing lines are increased in the substation every year, and alternating current withstand voltage tests need to be performed on the cables in urban distribution network technology transformation projects and the like.
The cable in the substation is usually located the cubical switchboard in one end, and the other end is located the outer cable terminal tower of station and cable distribution box, and wherein the number of times that cable terminal broke down in the cubical switchboard is obviously more than the other end. Because the cable compartment space is narrow and small in the cubical switchboard, can only satisfy the safe distance of operation, and power cable withstand voltage test voltage is far higher than operating voltage, need demolish cable termination binding post, terminal shutoff mud, cable termination below rigidity fixed before carrying out withstand voltage test to the cable, and the movable cable satisfies withstand voltage test safe distance and fixes the back, can carry out withstand voltage test.
The switch cabinet has a narrow space, so that the safety distance in operation can be met only. And the switch cabinet lower port is mostly firm sharp metal material, and the following shortcoming exists in the withstand voltage test of direct cable in to the switch cabinet: when a plugging and dragging cable is damaged, the cable terminal is very easy to scratch, even the cable body is cut, and the cable body and the terminal insulation are damaged. And secondly, equipment such as a lightning arrester, a current transformer and the like are arranged in the cable bin of the switch cabinet, and mechanical damage is easily caused to other equipment by repeatedly moving the cable. And thirdly, the bending radius of the cable body needs to be considered when the cable is moved, and the cable body is easily damaged mechanically due to the fact that the bending radius is too small. Fourthly, the whole process is troublesome and labor-consuming, and needs a plurality of workers to finish the process together, so that the working efficiency of the pressure resistance test is greatly reduced.
Therefore, how to reduce the difficulty of the withstand voltage test of the cable terminal is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a cable termination withstand voltage test eduction gear to reduce the withstand voltage test degree of difficulty at cable termination.
In order to achieve the above object, the utility model provides a following technical scheme:
a cable terminal withstand voltage test leading-out device comprises a connecting terminal connected with a cable terminal and a high-voltage lead which is led out from the connecting terminal and connected with the withstand voltage test device;
the connecting terminal comprises a test sleeve connected with the cable terminal in a wiring mode and an insulating layer arranged outside the test sleeve.
Preferably, in the cable termination withstand voltage test lead-out device, the test bushing is a connection bushing made of a copper conductor material.
Preferably, in the above cable terminal pressure resistance test leading-out device, the test bushing includes a cylindrical bushing main body which is in plug-in fit with the cable terminal, and a connecting copper bar which is arranged on an inner wall of the bushing main body and is fixedly connected to the cable terminal.
Preferably, in the above cable terminal pressure resistance test lead-out device, an insertion opening into which the cable terminal is inserted and fitted is formed at one axial end of the tubular bushing main body, a lead plate for sealing the axial end of the bushing main body is formed at the other axial end of the bushing main body, and the high-voltage lead is fixedly connected to the lead plate.
Preferably, in the above cable termination withstand voltage test drawing device, the insulating layer is a rubber insulating layer attached to an outer wall surface of the bushing main body.
Preferably, in the above cable terminal withstand voltage test lead-out device, the rubber insulating layer is an ethylene propylene diene monomer insulating layer.
Preferably, in the above cable termination withstand voltage test lead-out device, the rubber insulating layer is a silicone rubber insulating layer.
Preferably, in the above cable terminal withstand voltage test lead-out device, the high-voltage lead is a high-voltage lead with a copper core as a wire core and an ethylene propylene diene monomer rubber sheath as a lead sheath.
Preferably, in the cable terminal withstand voltage test lead-out device, the terminal of the high-voltage lead is provided with a terminal which is in wiring fit with the withstand voltage test device.
The utility model provides a cable terminal withstand voltage test leading-out device, which comprises a connecting terminal connected with a cable terminal, and a high-voltage lead which is led out by the connecting terminal and connected with the withstand voltage test device; the connecting terminal comprises a test sleeve connected with the cable terminal in a wiring mode and an insulating layer arranged outside the test sleeve. When the cable terminal carries out withstand voltage test, be connected with cable terminal through eduction gear, eduction gear's connecting terminal is connected conduction electric power by its test sleeve pipe and cable terminal, the outside insulating layer that sets up of test sleeve pipe protects connecting terminal and cable terminal's link insulation, by high-voltage lead wire connection test sleeve pipe, and draw cable terminal's electric power out by the cubical switchboard, thereby need not the position at mobile cable terminal, need not to demolish the cubical switchboard shutoff, can realize cable terminal and withstand voltage test device's connection, reduce the use of manpower and materials, reduce the mechanical damage risk to cable and cable terminal, reduce the experimental degree of difficulty of cable terminal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the utility model provides a cable termination withstand voltage test extraction element's schematic structure diagram.
Detailed Description
The utility model discloses a cable termination withstand voltage test extraction element has reduced the withstand voltage test degree of difficulty at cable termination.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, fig. 1 is a schematic structural diagram of the cable terminal withstand voltage test leading-out device provided by the utility model.
The embodiment provides a leading-out device for a withstand voltage test of a cable terminal, which comprises a connecting terminal 1 connected with the cable terminal, and a high-voltage lead 2 led out from the connecting terminal 1 and connected with the withstand voltage test device; the connection terminal 1 includes a test bushing 11 connected to a cable terminal connection, and an insulating layer 12 disposed outside the test bushing 11. When the cable terminal carries out withstand voltage test, be connected with cable terminal through the eduction gear, draw out gear's connecting terminal 1 is connected conduction electric power by its test sleeve 11 and cable terminal, test sleeve 11 outside sets up insulating layer 12 with test sleeve 11 and cable terminal's link insulation protection, connect terminal 1 by high-voltage lead 2 connection, and draw out cable terminal's electric power by the cubical switchboard, thereby need not to remove cable terminal's position, need not to demolish the cubical switchboard shutoff, can realize cable terminal and withstand voltage test device's connection, reduce the use of manpower and materials, reduce the mechanical damage risk to cable and cable terminal, reduce the experimental degree of difficulty of cable terminal.
In one embodiment of the present disclosure, the test sleeve 11 is a connection sleeve made of copper conductor. The cable terminal conveys the high-voltage power transmitted by the cable to a withstand voltage test device through the leading-out device for carrying out withstand voltage test, and the test sleeve 11 in the connecting terminal 1 is a connecting sleeve made of a copper conductor, so that the power transmission stability of the leading-out device for the withstand voltage test of the cable terminal is ensured, and the power transmission safety is improved.
In an embodiment of the present disclosure, the test sleeve 11 includes a cylindrical sleeve main body inserted and matched with the cable terminal, and a connecting copper bar disposed on an inner wall of the sleeve main body and connected to the cable terminal. When the cable terminal carries out withstand voltage test, because it transmits high voltage power, need guarantee the safety protection of cable terminal and peripheral equipment, this embodiment adopts the mode of not dismantling cable terminal, cable terminal and the inside components and parts safe distance of cubical switchboard are limited, need guarantee electric power protective capability between experimental sleeve pipe 11 and the inside components and parts of cubical switchboard, be connected experimental sleeve pipe 11 by tubular structure's sleeve pipe main part and cable terminal, cable terminal cartridge is in the inside of tubular sleeve pipe main part, and fix cable terminal by connecting the copper bar, the insulating layer is located the outside of sleeve pipe main part, effectively realize cable terminal and outside isolation promptly by sleeve pipe main part and insulating layer 12, further guarantee electric power transmission security.
In an embodiment of the present invention, an axial end of the cylindrical casing main body is provided with an insertion opening 13 for inserting and matching with a cable terminal, the axial other end of the casing main body is provided with a lead plate 14 for sealing the casing main body, and the high-voltage lead 2 is fixedly connected to the lead plate 14. The sleeve main body is of a cylindrical structure, an opening structure and a sealing structure are respectively arranged at two axial ends of the sleeve main body, the plug-in port 13 at one axial end of the sleeve main body is in plug-in fit with a cable terminal, and the discharge end of the cable terminal extends into the sleeve main body. The other axial end of the sleeve main body is sealed by a lead plate 14, and the high-voltage lead 2 is fixed on the lead plate 14 for power transmission.
In one embodiment, the insulating layer 12 is a rubber insulating layer attached to the outer wall surface of the casing body. The sleeve pipe main part is the tubular structure, and cable termination stretches into the inside of sleeve pipe main part and carries out terminal connection and power transmission, sets up the insulating layer for being located the rubber insulation layer of sleeve pipe main part outer wall, effectively realizes the insulating isolation of sleeve pipe main part and external environment, and the test sleeve pipe adopts the tubular pipeline structure, has also guaranteed the sufficient dielectric strength of eduction gear.
In one embodiment of the present disclosure, the rubber insulating layer is an epdm rubber insulating layer. The ethylene propylene diene monomer rubber has excellent insulating property, weather resistance and corrosion resistance, and prevents the copper conductor in the test sleeve from being affected with damp and mechanical damage. Certainly, the rubber insulating layer can also adopt a silicon rubber insulating layer, has good insulating performance and high cost performance, and is popularized and used by utilizing the leading-out device.
In the final draft of an embodiment of the present application, the high-voltage lead 2 is a high-voltage lead with a copper core as a wire core and an ethylene propylene diene monomer rubber sheath as a lead sheath. The high-voltage lead is electrically led out through a cable terminal, a copper core high-voltage lead is adopted, and the high-voltage lead is protected by an ethylene propylene diene monomer rubber sheath, so that the long-term use safety of the high-voltage lead is improved.
In an embodiment of the present disclosure, the terminal of the high voltage lead 2 is provided with a terminal 2 which is matched with the connection of the voltage withstand test device. In order to facilitate the connection of the high-voltage lead and the voltage withstand test device, the wiring terminal of the high-voltage lead is connected with an external circuit by a wiring terminal, so that the wiring difficulty is reduced, and the power transmission stability is improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A cable terminal withstand voltage test leading-out device is characterized by comprising a connecting terminal connected with a cable terminal and a high-voltage lead which is led out from the connecting terminal and connected with the withstand voltage test device;
the connecting terminal comprises a test sleeve connected with the cable terminal in a wiring mode and an insulating layer arranged outside the test sleeve.
2. The cable termination withstand voltage test extraction device of claim 1, wherein the test sleeve is a connection sleeve made of a copper conductor material.
3. The leading-out device for the voltage withstand test of the cable terminal according to claim 2, wherein the test sleeve comprises a cylindrical sleeve main body which is inserted and matched with the cable terminal, and a connecting copper bar which is arranged on the inner wall of the sleeve main body and is fixedly connected with the cable terminal.
4. The apparatus according to claim 3, wherein an axial end of the tubular main body is provided with a plug-in port for mating with the cable terminal, and an axial other end of the main body is provided with a lead plate for sealing the main body, and the high-voltage lead is fixedly connected to the lead plate.
5. The cable termination withstand voltage test leading-out device according to claim 4, wherein the insulating layer is a rubber insulating layer attached to an outer wall surface of the bushing main body.
6. The cable termination withstand voltage test leading-out device according to claim 5, wherein the rubber insulating layer is an ethylene propylene diene monomer insulating layer.
7. The cable termination withstand voltage test leading-out device according to claim 5, wherein the rubber insulating layer is a silicon rubber insulating layer.
8. The cable termination withstand voltage test leading-out device of claim 5, wherein the high-voltage lead is a high-voltage lead with a copper core wire core and an ethylene propylene diene monomer rubber sheath.
9. The cable termination voltage withstand test leading-out device according to claim 5, wherein the terminal of the high-voltage lead is provided with a terminal which is in wiring fit with the voltage withstand test device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921265642.9U CN211014355U (en) | 2019-08-06 | 2019-08-06 | Cable terminal withstand voltage test leading-out device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921265642.9U CN211014355U (en) | 2019-08-06 | 2019-08-06 | Cable terminal withstand voltage test leading-out device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211014355U true CN211014355U (en) | 2020-07-14 |
Family
ID=71506902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921265642.9U Active CN211014355U (en) | 2019-08-06 | 2019-08-06 | Cable terminal withstand voltage test leading-out device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211014355U (en) |
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2019
- 2019-08-06 CN CN201921265642.9U patent/CN211014355U/en active Active
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