CN210040606U - Insulated wire connecting device - Google Patents
Insulated wire connecting device Download PDFInfo
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- CN210040606U CN210040606U CN201821946901.XU CN201821946901U CN210040606U CN 210040606 U CN210040606 U CN 210040606U CN 201821946901 U CN201821946901 U CN 201821946901U CN 210040606 U CN210040606 U CN 210040606U
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- insulating
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- insulated wire
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- 230000003068 static effect Effects 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 17
- 239000003292 glue Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- -1 silicon-magnesium-aluminum Chemical compound 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000257303 Hymenoptera Species 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses an insulated wire connecting device, including the cable clamp, go up insulating casing and lower insulating casing, the cable clamp includes the fastener body, be equipped with two recesses on the fastener body, the embedding can reciprocate move the chuck in the recess, fixedly connected with and move the chuck and press from both sides tight quiet chuck each other on the fastener body, two quiet chuck connections are the Y type, the fastener body of recess bottom is equipped with the screw hole, threaded hole is equipped with the bolt, the bolt is used for moving the chuck and pressing from both sides tightly on quiet chuck, it cup joints on quiet chuck to go up insulating casing, lower insulating casing cup joints on moving the chuck, it passes through the buckle with lower insulating casing to go up insulating casing and connects. This cable clamp has changed the atress mode and the fixed mode of wire, adds the auto-lock structure, and movable chuck and quiet chuck can press from both sides tight wire, are in the zonulae occludens state between wire and the fastener after making its installation all the time, adapt to multiple specification cable, simple structure, and equipment, dismantlement are convenient, repeatedly usable does benefit to the popularization.
Description
Technical Field
The utility model belongs to wire and the field of splicing, in particular to insulated wire connecting device.
Background
In the power installation, the problem of connection points is caused because the lead needs to be connected because the lead is not long enough in the power installation, the lead connection is a very critical process in the power distribution project, the quality of the lead joint directly influences whether an installation circuit can safely and reliably operate, and meanwhile, the service life of the lead is directly influenced by the quality of the lead joint. At present, 61 percent of line emergency repair faults occur at cable joints. At present, the wiring or jumper wire in the power transmission and distribution line mainly adopts the modes of hand-tying type, parallel groove clamp type, puncture wire clamp type, C-shaped wire clamp type and the like. Among them, the most conventional hand-bound (about 80%) and relatively new C-type clamps are mainly used. Under the condition of low power consumption in the past, the hand-binding type with lower cost is basically adopted to meet the requirements, but along with the continuous increase of the power consumption of users, the mode of continuously adopting the hand-binding wire obviously cannot meet the requirements, such as the electrochemical corrosion problem of copper and aluminum under heavy current, the problem of loosening caused by expansion and contraction caused by heat and the problem of aging and falling of an adhesive tape between the binding wires are all difficult to solve. In order to solve the problems of the hand-binding wire mode, the parallel groove wire clamp mode, the puncture wire clamp mode, the C-shaped wire clamp mode and the like are adopted, but the modes have high requirements on the installation process, particularly the wire diameter of the wire and a wire connecting hole in the wire clamp are strict, the design effect can be achieved only by matching the wire diameter and the wire connecting hole one by one, and in fact, the outer diameter of the conductor of the insulated wire is rarely just the nominal outer diameter during design, so that the wrong type is generated during the construction and maintenance process, the clamp type is not tight due to large size, the overcurrent is influenced, and the wire burning is easy to generate; the clamp type is small, so that the clamp cannot be pressed down and the self-locking function is lost. Meanwhile, the wire clamp is difficult to store and select spare parts due to the fact that the wire clamp is large in specification.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides an insulated wire connecting device, the double-layered line is firm stable, adapts to multiple specification cable, simple structure, and equipment, dismantlement are convenient, repeatedly usable.
In order to realize the purpose, the utility model discloses a technical scheme is:
the utility model provides an insulated wire connecting device, which comprises a cable clamp, an insulating shell, an upper insulating shell and a lower insulating shell, wherein the cable clamp comprises a clamp body, two grooves are arranged on the clamp body, a movable chuck capable of moving up and down is embedded in the grooves, a static chuck mutually clamped with the movable chuck is fixedly connected on the clamp body, the clamp body at the bottom of the grooves is provided with a threaded hole, a bolt is arranged in the threaded hole and used for clamping the movable chuck on the static chuck, the bottom of the clamp body is provided with a flange, a screw hole is arranged on the flange, a through hole corresponding to the screw hole is arranged on the insulating shell, the insulating shell is fixed on the clamp body through a screw, the upper insulating shell is sleeved on the static chuck, the lower insulating shell is sleeved on the movable chuck, the upper insulating shell and the lower insulating shell are connected through a buckle.
Preferably, one end of the upper insulating cover and one end of the lower insulating cover are sleeved with insulating sleeves.
Preferably, the bottom of the insulating shell is provided with a bolt through hole with external threads corresponding to the position of the bolt, the bolt is provided with an insulating cover with internal threads, and the insulating shell is connected with the insulating cover through a threaded structure.
Preferably, still include the protection casing, the protection casing is located the fastener body with between the insulating casing, the fastener body upper portion outside is equipped with the stopper, the stopper is used for restricting the protection casing slippage upwards.
Preferably, the clamp comprises an upper insulating shell and a lower insulating shell, the upper insulating shell is sleeved on the static chuck, the lower insulating shell is sleeved on the movable chuck, the upper insulating shell is connected with the lower insulating shell through a buckle, and one end of each of the upper insulating cover and the lower insulating cover is sleeved with an insulating sleeve.
Preferably, the edges of the upper insulating cover and the lower insulating cover are provided with corresponding first sealing grooves, and sealing gaskets are arranged in the first sealing grooves.
Preferably, still include by last box body and the ant box of preventing that the box body constitutes down, go up the box body with the junction of box body is equipped with the second seal groove down, be equipped with the sealing strip on the second seal groove, the cable clamp is established in preventing the ant box, the both ends of preventing the ant box are equipped with the line hole, the line hole department of preventing ant box both ends is equipped with the cavity that is used for pouring into sealed glue, prevent the ant box be equipped with the notes gluey hole of cavity intercommunication.
Preferably, the cavity comprises an upper groove body arranged on the upper box body and a lower groove body arranged on the lower box body, and the upper groove body and the lower groove body form the cavity.
Preferably, an elastic rubber pad is arranged on the inner side of the line hole.
The beneficial effects of the utility model reside in that:
the movable chuck can move up and down through the twisting of the bolt and is clamped with the static chuck to form an inner arc surface structure, the shape of the cable is matched, the contact area of the cable clamp body and a lead is large, the cable is clamped firmly and stably, the movable chuck can be prevented from sliding downwards when clamping the cable to cause loosening, the clamping of the cable is strengthened, the size of the inner arc surface structure can be changed when the movable chuck moves up and down, the cable clamp is suitable for clamping cables of different specifications, and the cable clamp is simple in structure and wide in application range; the insulating shell can insulate the wire clamp body from the outside, can prevent the influence of environmental factors on the internal structure of the groove, ensures the continuous and stable work of the cable and plays a role in protecting the wire clamp body; the upper insulating shell is sleeved on the static chuck, and the lower insulating shell is sleeved on the movable chuck, so that the static chuck and the movable chuck are isolated from the outside to a certain extent, an insulating protection effect is realized on a cable core, and meanwhile, the cable is also prolonged and fixed, so that the cable clamp body and the cable are prevented from loosening due to shaking in the working process, the wiring effect is prevented from being influenced, and the fixation of the cable is further enhanced; the device is simple and convenient to disassemble and assemble, long in service life, free of frequent maintenance and beneficial to large-scale popularization.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
Fig. 1 is the structure schematic diagram of each subassembly of the cable clamp of the utility model.
Fig. 2 is the schematic diagram of the structure of the wire clamp body of the present invention.
Fig. 3 is the utility model discloses the cover has the fastener body structure sketch map of protection casing.
Fig. 4 is the utility model discloses cable clamp overall structure schematic diagram.
Fig. 5 is a schematic view of the three-dimensional structure of the ant-proof box of the present invention.
Fig. 6 is a top view of the ant-proof box of the present invention.
Fig. 7 is a schematic view of the cross-sectional structure a-a in fig. 6.
Fig. 8 is a schematic view of the cross-sectional structure B-B in fig. 6.
Fig. 9 is a schematic view of the structure of the ant-proof box of the present invention.
Fig. 10 is a schematic view of the downward structure of the ant-proof box of the present invention.
In the figure, 1 wire clamp body, 2 grooves, 3 movable chucks, 4 static chucks, 5 bolts, 6 sawtooth blocks, 7 compression springs, 8 protective covers, 9 limiting blocks, 10 flanges, 11 screws, 12 insulating shells, 13 upper insulating shells, 14 lower insulating shells, 15 sealing gaskets, 16 first sealing grooves, 17 insulating sleeves, 18 insulating covers, 19 non-return sawteeth, 20 screw holes, 21 cable clamps, 22 ant-prevention boxes, 23 wire holes, 24 upper box bodies, 25 glue injection holes, 26 second sealing grooves, 27 lower box bodies, 28 upper box bodies, 29 lower box bodies and 30 cavities.
Detailed Description
In order to better understand the technical content of the present invention, the following embodiments are provided, and the present invention is further described with reference to the accompanying drawings.
Example 1
Referring to fig. 1 to 4, the utility model provides an insulated wire connecting device, including cable clamp 21, insulating housing 12, upper insulation shell 13 and lower insulation shell 14, cable clamp 21 includes clamp body 1, be equipped with two recesses 2 on the clamp body 1, embedding movable chuck 3 that can reciprocate in the recess 2, fixedly connected with on the clamp body 1 with the relative static chuck 4 of the clamping end of movable chuck 3, the clamp body 1 of recess 2 bottom is equipped with the screw hole, threaded hole is equipped with bolt 5, bolt 5 is used for with movable chuck 3 clamp tightly on static chuck 4, accessible twist bolt 5 drive movable chuck 3 reciprocate, make the interior disc of centre gripping of static chuck 4 and movable chuck 3 form the arc structure, match the shape of cable, clamp the cable; the wire clamp body 1 is made of silicon-magnesium-aluminum alloy materials, the silicon-magnesium-aluminum alloy materials are good in overcurrent performance, and the problems of galvanic corrosion and copper-aluminum transition which cannot be solved by other aluminum wire clamps for a long time are solved; the cable clamp comprises a cable clamp body 1, wherein a flange 10 is arranged at the bottom of the cable clamp body 1, a screw 11 hole 20 is arranged on the flange 10, a through hole corresponding to the screw hole 20 is arranged on an insulating shell 12, the insulating shell 12 is fixed on the cable clamp body 1 through the screw 11, the cable clamp body 1 can be insulated from the outside, the influence of environmental factors on the internal structure of a groove 2 is prevented, the continuous and stable work of a cable is ensured, an upper insulating shell 13 is sleeved on a static chuck 4, a lower insulating shell 14 is sleeved on a movable chuck 3, the upper insulating shell 13 is connected with the lower insulating shell 14 through a lock catch, the static chuck 4 and the movable chuck 3 are isolated from the outside to a certain extent, the cable core is insulated and protected, meanwhile, the cable is also prolonged and fixed, and the cable clamp body 1 and the cable are prevented from loosening caused by shaking in the working process, further strengthening the fixation of the cable. When the cable clamp 21 is used, the bolt 5 is twisted, the movable chuck 3 is made to move downwards, when the distance between the movable chuck 3 and the static chuck 4 is larger than the diameter of a cable, the cable is placed between the movable chuck 3 and the static chuck 4, the bolt 5 is twisted to move upwards, the movable chuck 3 is driven to move upwards at the same time, until an inner arc surface structure between the movable chuck 3 and the static chuck 4 can clamp the cable, the insulating shell 12 is sleeved on the existing cable clamp body 1, then the upper insulating shell 13 is sleeved on the static chuck 4, the lower insulating shell 14 is sleeved on the movable chuck 3, and the upper insulating shell 13 and the lower insulating shell 14 are fixed. When the cable is disassembled and assembled, the upper insulating shell 13 and the lower insulating shell 14 are firstly disassembled, the bolt 5 is twisted to enable the bolt 5 to move downwards, meanwhile, the movable chuck 3 also moves downwards, when the distance between the movable chuck 3 and the static chuck 4 is larger than the size of the cable, and the cable connecting clamp is taken down.
The side surface of the movable chuck 3 is provided with a non-return sawtooth 19 which is non-return downwards, the outer side of the non-return sawtooth 19 is provided with a sawtooth block 6 which is matched with the non-return sawtooth 19, a pressure spring 7 is arranged on the side wall of the groove 2, the sawtooth block 6 is pressed on the non-return sawtooth 19 by the pressure spring 7, wherein the non-return saw teeth 19 can be arranged at one side or two sides of the movable chuck 3, the outer side of the corresponding non-return saw teeth 19 is provided with a saw tooth block 6 matched with the non-return saw teeth 19, and a spring is arranged between the sawtooth block 6 and the side wall of the groove 2 to form a self-locking structure, further fixing the movable chuck 3, can prevent the cable clamp 21 from loosening when clamping the cable, strengthen the clamping degree of the cable clamp 21 to the cable, ensure that the cable clamp 21 is always in a high-efficiency and stable working state, wherein the clamping part of the movable chuck 3 is provided with an anti-skid groove which can enhance the contact between the cable and the movable chuck 3;
specifically, the bottom of the insulating shell 12 is provided with a bolt through hole with external threads corresponding to the bolt 5, the bolt 5 is provided with an insulating cover 18 with internal threads, the insulating shell 12 is connected with the insulating cover 18 through a threaded structure, the insulating cover 18 is detachably fixed on the insulating shell 12, the insulating cover 18 can cover the bolt 5 and is fixed on the insulating shell 12, an insulating effect is achieved, and the operation is convenient while the personal safety of workers is guaranteed.
It is concrete, still include protection casing 8, protection casing 8 is located fastener body 1 with between the insulating casing 12, the 1 upper portion outside of fastener body is equipped with stopper 9, stopper 9 is used for the restriction 8 slippage upwards of protection casing, and protection casing 8 can block the part that sets up in the recess 2 on the one hand, prevents that sawtooth block 6, pressure spring 7 from falling out, and on the other hand makes the atress of cable conductor more even, encapsulates the inner structure.
Specifically, the corresponding first sealing grooves 16 are formed in the edges of the upper insulating cover 13 and the lower insulating cover 14, and the sealing gaskets 15 are arranged in the first sealing grooves, so that the cables exposed outside the joints can be insulated, and the cables and the cable clamps 21 can be ensured to operate safely and stably all the time.
Specifically, one end of the upper insulating shell 13 and one end of the lower insulating shell 14 are sleeved with an insulating sleeve 17, so that the connection stability between the upper insulating shell 13 and the lower insulating shell 14 can be enhanced.
Example 2
Referring to fig. 1 to 10, the embodiment is different from embodiment 1 in that the embodiment further includes an ant-prevention box, and further includes an ant-prevention box 22 composed of an upper box body 24 and a lower box body 27, a second sealing groove 26 is provided at a joint of the upper box body 24 and the lower box body 27, a sealing strip (marked in the figure) is provided on the second sealing groove 26, the cable clamp 21 is provided in the ant-prevention box 32, two ends of the ant-prevention box 22 are provided with wire holes 23, the wire holes 23 at two ends of the ant-prevention box 22 are provided with cavities 30 for injecting sealant, the ant-prevention box 22 is provided with a sealant injection hole 25 communicated with the cavities 30, so as to prevent an ant from affecting the cable; wire holes 23 are formed in two ends of the ant prevention box, and a power supply cable penetrates through the ant prevention box; and a hole cover (marked in the figure) is arranged on the glue injection hole 25 to protect the glue in the glue injection hole 25 from being influenced by external rainwater, so that the ant prevention effect is further ensured.
Specifically, the cavity 30 comprises an upper groove 28 arranged on the upper box body 24 and a lower groove 29 arranged on the lower box body 27, the upper groove 28 and the lower groove 29 form the cavity 30, and sealant is injected into the cavity 30, so that the whole cable clamp 21 is in a sealed state, the problem of damage of ants to cables for a long time can be solved, meanwhile, the influence of rainwater in the environment can be prevented, the service life of the cables is long, and the use efficiency is improved.
Specifically, an elastic rubber pad (not marked in the figure) is arranged on the inner side of the wire hole 23, so that the cable is not abraded when passing through the wire hole 23, and the integrity of a cable protective layer is ensured.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The insulated wire connecting device is characterized by comprising a cable clamp, an insulating shell, an upper insulating shell and a lower insulating shell, wherein the cable clamp comprises a clamp body, two grooves are formed in the clamp body, movable chucks capable of moving up and down are embedded in the grooves, static chucks mutually clamped with the movable chucks are fixedly connected to the clamp body, a threaded hole is formed in the clamp body at the bottom of each groove, a bolt is arranged in the threaded hole and used for clamping the movable chucks on the static chucks, a flange is arranged at the bottom of the clamp body and provided with a screw hole, a through hole corresponding to the screw hole is formed in the insulating shell, the insulating shell is fixed on the clamp body through a screw, the upper insulating shell is sleeved on the static chucks, and the lower insulating shell is sleeved on the movable chucks, go up insulating casing with insulating casing passes through the buckle and connects down, still includes the ant box of preventing that constitutes by last box body and lower box body, go up the box body with the junction of box body is equipped with the second seal groove down, be equipped with the sealing strip on the second seal groove, the cable clamp is established in preventing the ant box, the both ends of preventing the ant box are equipped with the line hole, the line hole department of preventing ant box both ends is equipped with the cavity that is used for pouring into sealed glue, prevent the ant box be equipped with the notes gluey hole of cavity intercommunication.
2. The insulated wire connection device according to claim 1, wherein an insulating sleeve is sleeved on one end of the upper insulating cover and one end of the lower insulating cover.
3. The insulated wire connection device according to claim 1, wherein the bottom of the insulating housing is provided with a bolt through hole having an external thread corresponding to the position of the bolt, the bolt is provided with an insulating cover having an internal thread, and the insulating housing is connected to the insulating cover by a thread structure.
4. The insulated wire connecting device according to claim 1, further comprising a protective cover, wherein the protective cover is disposed between the wire clamp body and the insulating housing, and a limiting block is disposed on an outer side of an upper portion of the wire clamp body and used for limiting the protective cover from slipping upwards.
5. The insulated wire connection device according to claim 1, wherein the movable collet is provided at a side thereof with non-return saw teeth which are non-return downward, and the side wall of the groove is provided with a pressure spring and a saw tooth block, the pressure spring pressing the saw tooth block against the non-return saw teeth.
6. The insulated wire connection device according to claim 1, wherein the edges of the upper and lower insulation covers are provided with corresponding first sealing grooves, and sealing gaskets are disposed in the first sealing grooves.
7. The insulated wire connection device of claim 1, wherein the cavity comprises an upper slot disposed on the upper box body and a lower slot disposed on the lower box body, and the upper slot and the lower slot form the cavity.
8. The insulated wire connection device according to claim 1, wherein an elastic rubber pad is provided inside the wire hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821946901.XU CN210040606U (en) | 2018-11-23 | 2018-11-23 | Insulated wire connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821946901.XU CN210040606U (en) | 2018-11-23 | 2018-11-23 | Insulated wire connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210040606U true CN210040606U (en) | 2020-02-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821946901.XU Active CN210040606U (en) | 2018-11-23 | 2018-11-23 | Insulated wire connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210040606U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964555A (en) * | 2021-09-27 | 2022-01-21 | 国网河北省电力有限公司邯郸市永年区供电分公司 | Cable crimping device for electric power engineering |
| CN114172077A (en) * | 2021-12-07 | 2022-03-11 | 国网福建省电力有限公司电力科学研究院 | Device for gluing and insulating 10KV wire clamp |
| CN115939801A (en) * | 2022-11-28 | 2023-04-07 | 国网山东省电力公司临沂供电公司 | One-piece ground potential connection device |
-
2018
- 2018-11-23 CN CN201821946901.XU patent/CN210040606U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964555A (en) * | 2021-09-27 | 2022-01-21 | 国网河北省电力有限公司邯郸市永年区供电分公司 | Cable crimping device for electric power engineering |
| CN114172077A (en) * | 2021-12-07 | 2022-03-11 | 国网福建省电力有限公司电力科学研究院 | Device for gluing and insulating 10KV wire clamp |
| CN114172077B (en) * | 2021-12-07 | 2024-01-23 | 国网福建省电力有限公司电力科学研究院 | A device for gluing and insulating 10KV wire clips |
| CN115939801A (en) * | 2022-11-28 | 2023-04-07 | 国网山东省电力公司临沂供电公司 | One-piece ground potential connection device |
| CN115939801B (en) * | 2022-11-28 | 2024-08-16 | 国网山东省电力公司临沂供电公司 | Ground potential grounding wire device |
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