CN114069532B - Windproof low-temperature-resistant shrinkage circuit - Google Patents
Windproof low-temperature-resistant shrinkage circuit Download PDFInfo
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- CN114069532B CN114069532B CN202111461134.XA CN202111461134A CN114069532B CN 114069532 B CN114069532 B CN 114069532B CN 202111461134 A CN202111461134 A CN 202111461134A CN 114069532 B CN114069532 B CN 114069532B
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- 239000004020 conductor Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers
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- Insulated Conductors (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention discloses a windproof low-temperature-resistant shrinkage circuit, which comprises: the adjusting device connected to the circuit comprises a shell, a first connecting piece and a second connecting piece, wherein the first connecting piece and the second connecting piece are respectively arranged at two ends of the shell, the first end of the first connecting piece leaks out of the shell and is connected with the circuit, the first end of the second connecting piece leaks out of the shell and is connected with the other end of the circuit, the second end of the first connecting piece and the second end of the second connecting piece are in sliding connection inside the shell, and an elastic piece is arranged between the first connecting piece and the second connecting piece, so that the safety problems of cross arm discharging and the like caused by wire pulling up due to cold shrinkage of the circuit are solved.
Description
Technical Field
The invention relates to the technical field of cable lines, in particular to a windproof low-temperature-resistant shrink line.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The power transmission line is realized by boosting the electric energy generated by the generator by using a transformer and accessing the electric energy into the power transmission line through control equipment such as a circuit breaker and the like. The power transmission line comprises an overhead power transmission line, and the overhead power transmission line is composed of a line tower, a wire, an insulator, a line fitting, a stay wire, a tower foundation, a grounding device and the like and is erected on the ground. Along with global warming, strong typhoons in summer and cold weather in winter caused by the phenomenon of el nino and lanina are increasingly increased, and requirements for meeting the line shrinkage at the lowest temperature and the distance between lines at the strongest wind speed are provided for the high altitude line Lu Huchui. The situation that the wire is pulled up and the wire cross arm discharges due to the wire shrinkage in severe cold weather is reported in many places, which indicates that the phenomenon of the current wire shrinkage caused by cold is common.
Aiming at the situation, the current adopted solving means are as follows:
① By adopting the temporary reinforcement insulator, the insulator and the cross arm can bear larger structural force in the mode, and the tower can be deformed and collapsed possibly.
② By adopting the way of re-erecting the towers and shortening the distance between the towers, the line transformation cost is greatly increased.
Disclosure of Invention
Aiming at the defects existing in the prior art, the embodiment of the invention aims to provide a windproof low-temperature-shrinkage-resistant circuit, which solves the safety problems of cross arm discharge and the like caused by wire pulling up due to cold shrinkage of the circuit.
In order to achieve the above object, an embodiment of the present invention provides a windproof low temperature shrinkage-resistant line, including: the adjusting device connected to the circuit comprises a shell, a first connecting piece and a second connecting piece, wherein the first connecting piece and the second connecting piece are respectively arranged at two ends of the shell, the first end of the first connecting piece leaks out of the shell and is connected with the circuit, the first end of the second connecting piece leaks out of the shell and is connected with the other end of the circuit, the second end of the first connecting piece and the second end of the second connecting piece are in sliding connection with the inside of the shell, and an elastic piece is arranged between the first connecting piece and the second connecting piece.
Further, the second end of the first connecting piece is a plug-in connection part, the second end of the second connecting piece is a clamping part, and the plug-in connection part is in sliding connection with the clamping part.
Further, the clamping part is close to one end of the plug-in connection part and is provided with a plurality of clamping pieces, and the clamping pieces are located on the same circumference and extend along the axial direction of the shell.
Further, along the direction away from the second connecting piece, a plurality of clamping pieces gradually shrink to be conical on one side away from the shell.
Further, the wire also comprises a spiral wire, the wire is formed by an inner wire layer and an outer wire layer in an integrated manner, the thermal expansion coefficient of the outer wire layer is larger than that of the inner wire layer, the outer wire layer and the inner wire layer are provided with interfaces, the interfaces and the wire cross section form a first junction and a second junction, and the distance from the axial lead of the spiral wire to the first junction is larger than that from the axial lead to the second junction.
Further, the interface between the outer layer of the wire and the inner layer of the wire is in a straight line in the section of the wire.
Further, the interface between the outer layer and the inner layer is curved in the section of the wire.
Further, the interface between the outer layer and the inner layer of the wire is a wavy line in the section of the wire.
Further, a plurality of the wires are arranged in parallel.
Further, the anti-breaking structure comprises an anti-breaking piece, and two ends of the anti-breaking piece are respectively connected to two ends of the wire.
One or more technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:
1. According to the windproof low-temperature-resistant contraction circuit, the elastic telescopic adjusting device is arranged, so that the cable is expanded and prolonged at normal temperature and high temperature, the tension of the adjusting device is reduced, and the adjusting device is elastically shortened to shorten the length of the whole circuit; under the low temperature environment, the cable is shortened under the cold condition, the tension of the adjusting device is increased, and the adjusting device is elastically stretched to prolong the length of the whole line, so that the wire is prevented from being pulled up. The length of the line is compensated through the elastic telescopic adjusting device, so that the line can keep a proper line sag under high-temperature and low-temperature environments, the wire is prevented from being pulled up, and the safety problems of cross arm discharge and the like caused by the wire pulling up due to the fact that the line is contracted by cooling are solved.
2. In the embodiment of the invention, the distance from the axial lead of the spiral wire to the first junction is larger than the distance from the axial lead to the second junction, so that the internal stress of the wire is deflected to the axial direction of the wire, when the wire stretches in the axial direction of the wire to a certain extent due to temperature change, the wire has high elasticity and is similar to a rigid body at normal temperature and high temperature, and the length of the wire is not prolonged at high temperature. At normal temperature and high temperature, the wire has large elasticity and is similar to a rigid body, so that the length of the circuit is not prolonged at high temperature. In winter, especially in low temperature environment, the elasticity of the wire is reduced, and the wire is expanded with heat and contracted with cold, so that the wire can generate larger tension, the wire is stretched to prolong the wire, the wire is prevented from being pulled up, and the safety problems of cross arm discharge and the like caused by the wire pulling up due to the fact that the wire is contracted by cooling are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic view of a regulator device for a wind-resistant low temperature shrink circuit in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a wire of a wind-resistant low temperature shrink-resistant circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a cross-section of a wire of a wind-resistant low temperature shrink-resistant circuit according to an embodiment of the present invention;
FIG. 4 is an enlarged cross-sectional view of FIG. 3;
FIG. 5 is a second schematic diagram of a cross-section of a wire of a windproof anti-low temperature shrink circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram III of a cross-section of a wire of a windproof anti-low temperature shrink circuit according to an embodiment of the invention;
FIG. 7 is a schematic illustration of a plurality of conductors of a wind-resistant low temperature shrink resistant circuit in parallel according to an embodiment of the present invention;
In the figure: 10-adjusting device, 11-shell, 111-casing, 112-stopper, 12-first connector, 121-plug-in part, 122-first boss, 13-second connector, 131-second boss, 132-clamping part, 133-clamping piece, 134-transition part, 14-elastic part, 20-wire, 20 a-first junction, 20 b-second junction, 21-wire inner layer, 22-wire outer layer.
The mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the present invention clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and/or "include" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "upper", "lower", "left" and "right" in the present invention, if they mean only that the directions are consistent with the upper, lower, left, and right directions of the drawings per se, and do not limit the structure, only for convenience of description and simplification of the description, but do not indicate or imply that the apparatus or element to be 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.
The terms "mounted," "connected," "secured," and the like are to be construed broadly and refer to either a fixed connection, a removable connection, or an integral body, for example; the terms "mechanically coupled" and "directly coupled" may be used interchangeably to refer to either a mechanical coupling, an indirect coupling via an intermediary, an internal coupling of two elements, or an interaction of two elements, as would be understood by one of ordinary skill in the art, and the terms are to be understood in the specific sense of the present invention as appropriate.
Aiming at the problem of line shrinkage in winter in the background technology, the invention provides a low-temperature shrinkage resistant line, cables are connected through an elastically telescopic adjusting device, the cable is expanded and prolonged at normal temperature and high temperature, the tension of the adjusting device is reduced, and the adjusting device is elastically shortened to shorten the length of the whole line; under the low temperature environment, the cable is shortened under the cold condition, the tension of the adjusting device is increased, and the adjusting device is elastically stretched to prolong the length of the whole line, so that the wire is prevented from being pulled up. The length of the line is compensated through the elastic telescopic adjusting device, so that the line can keep a proper line sag under high-temperature and low-temperature environments, the wire is prevented from being pulled up, and the safety problems of cross arm discharge and the like caused by the wire pulling up due to the fact that the line is contracted by cooling are solved.
As shown in fig. 1, an embodiment of the present invention describes a low temperature shrinkage-resistant circuit, including an adjusting device 10 connected to the circuit, where the adjusting device 10 includes a housing 11, a first connecting member 12 and a second connecting member 13, where the first connecting member 12 and the second connecting member 13 are respectively disposed at two ends of the housing 11, a first end of the first connecting member 12 leaks out of the housing 11 to connect with a cable, a first end of the second connecting member 13 leaks out of the housing 11 to connect with another cable, a second end of the first connecting member 12 and a second end of the second connecting member 13 are slidably connected in the housing interior 11, and an elastic member 14 is disposed between the first connecting member 12 and the second connecting member 13.
Specifically, the number of the adjusting devices installed on the whole circuit and the adjustable length of the adjusting devices are reasonably selected according to the external temperature environment of the circuit. When the temperature rises, the cable expands and lengthens, the tension of the adjusting device is reduced, and the elastic piece is shortened to shorten the length of the whole line; when the temperature is reduced, the cable is cooled and shortened, the tension of the adjusting device is increased, and the elastic piece is stretched to prolong the length of the whole circuit, so that the wire is prevented from being pulled up. The length of the line is compensated through the expansion and contraction of the elastic piece, so that the line can keep a proper line sag under high-temperature and low-temperature environments, the wire is prevented from being pulled up, and the safety problems of cross arm discharge and the like caused by the wire pulling up due to the fact that the line is contracted by cooling are solved.
Further, the second end of the first connecting member 12 is a plugging portion 121, the second end of the second connecting member 13 is a clamping portion 132, and the plugging portion 121 is slidably connected with the clamping portion 132.
Specifically, the first connecting piece 12 includes a first protruding portion 122 and a plugging portion 121 disposed on the first protruding portion 122. The insertion portion 121 is disposed inside the first protruding portion 122. The second connecting piece 13 includes a second protruding portion 131 and a clamping portion 132 disposed on the second protruding portion 131. The clamping portion 132 can be clamped to the outer wall of the plug portion 121. The elastic member 14 is disposed around the clamping portion 132, and both ends of the elastic member 14 elastically abut against the first protruding portion 122 and the second protruding portion 131 along the axial direction of the housing 11.
Further, a plurality of clamping pieces 133 are disposed at one end of the clamping portion 132 near the plugging portion 121, and the plurality of clamping pieces 133 are located on the same circumference and extend along the axial direction of the housing 11.
Specifically, the number of the grip pieces 133 may be any number greater than 1. In other embodiments, the plurality of clamping pieces 133 are located on the same circumference and may be uniformly distributed, but may not be uniformly distributed, and only the plurality of clamping pieces 133 are required to cooperate to clamp the plugging portion 121.
The plurality of clamping pieces 133 gradually shrink away from the side of the housing 11 in a direction away from the second connecting piece 13 to have a conical shape, so that an inner diameter of an end of the clamping portion 132 away from the second protruding portion 131 is smaller than an inner diameter of an end of the clamping portion 132 close to the second protruding portion 131. Because the clamping pieces 133 are all in a sheet-like structure, the end of the clamping portion 132 away from the second protruding portion 131 has elasticity along the radial direction of the housing 11, and the plugging portion 121 can expand the end of the clamping portion 132 away from the second protruding portion 131, so that the clamping portion is accommodated between the four clamping pieces 133, so that the four clamping pieces 133 are continuously clamped on the outer wall of the insertion portion 121.
Through setting up a plurality of grip tabs 133, make it have elasticity in the one end that keeps away from second bellying 131 to grip portion 132 lasts the centre gripping on grafting portion 121, thereby to grafting portion 121 that the diameter is different, grip portion 132 can both be better with grafting portion 121 contact, improved the adaptability of grip portion 132.
In addition, a transition portion 134 is formed at an end of the clamping piece 133 away from the second protruding portion 131, and the transition portion 134 is located at a side of the clamping piece 133 away from the inner wall of the housing 11. By providing the transition portion 134, a certain guiding function can be achieved when the inserting portion 121 is inserted between the clamping pieces 133, so that the inserting portion 121 can be inserted quickly.
In another embodiment, the wind-proof low-temperature-resistant shrink wire further comprises a spiral wire 20, the wire 20 is integrally formed by a wire inner layer 22 and a wire outer layer 21, the thermal expansion coefficient of the wire outer layer 21 is larger than that of the wire inner layer 22, the wire outer layer 21 and the wire inner layer 22 have an interface, the interface and the wire cross section form a first junction 20a and a second junction 20b, and the distance from the axis of the spiral wire to the first junction 20a is larger than the distance from the axis to the second junction 20 b.
In this embodiment, the inner layer and the outer layer of the wire are set to have two different expansion coefficients, when expansion and contraction occur due to temperature change, the spiral wire generates a certain internal stress due to the different expansion coefficients of the inner and outer sides, such as the force a pointing to the axis of the wire in fig. 2, and when the distances from the first junction and the second junction to the axis of the spiral wire are the same, the spiral wire is radially contracted.
In the embodiment of the invention, the distance from the axis of the spiral wire to the first junction point is larger than the distance from the axis to the second junction point (as shown by a dotted line in fig. 3), so that the internal stress of the wire is biased to the axis direction of the wire (as shown by a force a' in fig. 2), when the wire stretches and contracts to a certain extent in the axis direction of the wire due to temperature change, the wire has large elastic force and is similar to a rigid body at normal temperature and high temperature, and the length of the wire is not prolonged at high temperature. At normal temperature and high temperature, the wire has large elasticity and is similar to a rigid body, so that the length of the circuit is not prolonged at high temperature. In winter, especially in low temperature environment, the elasticity of the wire is reduced, and the wire is expanded with heat and contracted with cold, so that the wire can generate larger tension, the wire is stretched to prolong the wire, the wire is prevented from being pulled up, and the safety problems of cross arm discharge and the like caused by the wire pulling up due to the fact that the wire is contracted by cooling are solved.
Further as shown in fig. 4, the interface between the outer layer 21 and the inner layer 22 is a straight line in the section of the wire, and the straight line has a simple structure and is easy to process.
In another embodiment, as shown in fig. 5, the interface between the outer layer 21 and the inner layer 22 of the wire is an arc in the section of the wire, and the contact area between the inner side of the wire and the outer layer of the wire is increased by the arrangement of the arc section, so that the service life of the wire is prolonged.
In another embodiment, as shown in fig. 6, the interface between the outer layer 21 and the inner layer 22 of the wire is a wavy line in the section of the wire, and the contact area between the inner side of the wire and the outer layer of the wire is further increased by the wavy section, so that the service life of the wire is further prolonged.
Further as shown in fig. 7, a plurality of the wires 20 are arranged in parallel. The plurality of wires are respectively arranged around the circumference of the power transmission line, when one of the wires is broken, the other wires can still work normally, and the overall stability is provided.
Further, the anti-breaking structure comprises an anti-breaking piece, two ends of the anti-breaking piece are respectively connected to two ends of the conducting wire, the anti-breaking piece is used for keeping certain structural stability of a circuit through a pull rope after the conducting wire is broken, and the anti-breaking piece can be a flexible rope, a telescopic rigid rope or two hinged rigid rods.
Claims (9)
1. A wind-resistant, low temperature shrink circuit comprising: the adjusting device comprises a shell, a first connecting piece and a second connecting piece, wherein the first connecting piece and the second connecting piece are respectively arranged at two ends of the shell, the first end of the first connecting piece leaks out of the shell to be connected with the circuit, the first end of the second connecting piece leaks out of the shell to be connected with the other end of the shell, the second end of the first connecting piece and the second end of the second connecting piece are connected in a sliding mode, and an elastic piece is arranged between the first connecting piece and the second connecting piece;
The wire is formed by integrally forming an inner wire layer and an outer wire layer, the thermal expansion coefficient of the outer wire layer is larger than that of the inner wire layer, the outer wire layer and the inner wire layer are provided with interfaces, the interfaces and the wire cross section form a first junction and a second junction, and the distance from the axis of the spiral wire to the first junction is larger than that from the axis to the second junction.
2. The wind-resistant and low-temperature-resistant shrink circuit according to claim 1, wherein the first connecting piece second end is a plug-in connection, the second connecting piece second end is a clamping part, and the plug-in connection is slidingly connected with the clamping part.
3. The wind-proof low-temperature-resistant shrink circuit according to claim 2, wherein the clamping part is provided with a plurality of clamping pieces near one end of the plug-in part, and the plurality of clamping pieces are located on the same circumference and extend along the axial direction of the shell.
4. A wind-resistant and low temperature resistant shrink circuit according to claim 3, wherein a side of the plurality of holding pieces facing away from the housing is gradually shrunk to be conical in a direction away from the second connecting member.
5. The wind-resistant, low temperature shrink circuit of claim 1, wherein the interface of the outer conductor layer and the inner conductor layer is linear within the conductor cross-section.
6. The wind-resistant, low temperature shrink wire of claim 1, wherein the interface of the outer layer of wire and the inner layer of wire is arcuate in wire cross section.
7. The wind-resistant and low temperature shrink wire of claim 1, wherein the interface of the outer layer of wire and the inner layer of wire is wavy in cross section.
8. The wind-resistant and low temperature shrink circuit of claim 1, wherein a plurality of said wires are arranged in parallel.
9. The wind-resistant low temperature shrink circuit of claim 1, further comprising a breakage-resistant structure comprising a breakage-resistant member having ends connected to the ends of the wire, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111461134.XA CN114069532B (en) | 2021-12-03 | 2021-12-03 | Windproof low-temperature-resistant shrinkage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111461134.XA CN114069532B (en) | 2021-12-03 | 2021-12-03 | Windproof low-temperature-resistant shrinkage circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114069532A CN114069532A (en) | 2022-02-18 |
| CN114069532B true CN114069532B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111461134.XA Active CN114069532B (en) | 2021-12-03 | 2021-12-03 | Windproof low-temperature-resistant shrinkage circuit |
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|---|---|---|---|---|
| US3800064A (en) * | 1972-09-28 | 1974-03-26 | Electric G Specialty Co | Universal power cable joint with closed-cell sponge stress relief element |
| CN1319926A (en) * | 2000-03-13 | 2001-10-31 | 大明株式会社 | Construction method for cable erection and spiral for cable erection |
| CN101650991A (en) * | 2009-08-12 | 2010-02-17 | 徐州永达线缆有限公司 | Production method of telescopic wave-shaped cable conductor |
| CN205140598U (en) * | 2015-11-09 | 2016-04-06 | 金信诺光纤光缆（赣州）有限公司 | Steady looks coaxial cable of vibration self -constriction low -loss |
| CN106099486A (en) * | 2016-08-22 | 2016-11-09 | 深圳市华惠连接器有限公司 | The scalable contact of electric connector |
| CN207398803U (en) * | 2017-11-21 | 2018-05-22 | 湖南中缆电缆有限公司 | A kind of sliding-type cable shrinkage device |
| CN111541061A (en) * | 2020-05-28 | 2020-08-14 | 广东电网有限责任公司 | Circuit repairing device |
| CN211742743U (en) * | 2020-05-11 | 2020-10-23 | 许昌新万达电缆有限公司 | Cold-resistant anti-freezing cable |
| CN112709485A (en) * | 2020-12-23 | 2021-04-27 | 邵福群 | Telegraph pole structure for preventing uplift in high-latitude area |
-
2021
- 2021-12-03 CN CN202111461134.XA patent/CN114069532B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3800064A (en) * | 1972-09-28 | 1974-03-26 | Electric G Specialty Co | Universal power cable joint with closed-cell sponge stress relief element |
| CN1319926A (en) * | 2000-03-13 | 2001-10-31 | 大明株式会社 | Construction method for cable erection and spiral for cable erection |
| CN101650991A (en) * | 2009-08-12 | 2010-02-17 | 徐州永达线缆有限公司 | Production method of telescopic wave-shaped cable conductor |
| CN205140598U (en) * | 2015-11-09 | 2016-04-06 | 金信诺光纤光缆（赣州）有限公司 | Steady looks coaxial cable of vibration self -constriction low -loss |
| CN106099486A (en) * | 2016-08-22 | 2016-11-09 | 深圳市华惠连接器有限公司 | The scalable contact of electric connector |
| CN207398803U (en) * | 2017-11-21 | 2018-05-22 | 湖南中缆电缆有限公司 | A kind of sliding-type cable shrinkage device |
| CN211742743U (en) * | 2020-05-11 | 2020-10-23 | 许昌新万达电缆有限公司 | Cold-resistant anti-freezing cable |
| CN111541061A (en) * | 2020-05-28 | 2020-08-14 | 广东电网有限责任公司 | Circuit repairing device |
| CN112709485A (en) * | 2020-12-23 | 2021-04-27 | 邵福群 | Telegraph pole structure for preventing uplift in high-latitude area |
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| Publication number | Publication date |
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| CN114069532A (en) | 2022-02-18 |
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