CN219738820U - Knife switch capable of preventing gap from heating - Google Patents
Knife switch capable of preventing gap from heating Download PDFInfo
- Publication number
- CN219738820U CN219738820U CN202321020154.8U CN202321020154U CN219738820U CN 219738820 U CN219738820 U CN 219738820U CN 202321020154 U CN202321020154 U CN 202321020154U CN 219738820 U CN219738820 U CN 219738820U
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- China
- Prior art keywords
- wiring
- copper
- aluminum
- wiring part
- heating
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 17
- 239000010949 copper Substances 0.000 claims abstract description 17
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 abstract description 16
- 230000007704 transition Effects 0.000 abstract description 14
- 238000009826 distribution Methods 0.000 abstract description 9
- 230000020169 heat generation Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Landscapes
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
The utility model discloses a disconnecting link for preventing gap heating, wherein a wiring assembly of a disconnecting link body is used for being connected with an external lead; the wiring assembly is provided with a wiring hole, the front surface of the wiring assembly is a copper wiring part, the back surface of the wiring assembly is an aluminum wiring part, and the copper wiring part and the aluminum wiring part are connected into a whole; the device has simple structure, and the wiring assembly on the disconnecting link directly adopts the copper wiring part and the aluminum wiring part which are connected into a whole, so that the problem of gaps caused by insecurity of bolts due to the use of external copper-aluminum transition pieces can be avoided; the conditions of easy fracture, poor mechanical property, easy heating, poor electrical property and the like caused by welding can be avoided; the heat generation rate of the copper-aluminum transition terminal can be effectively reduced, and the operation safety of the distribution network is improved.
Description
Technical Field
The utility model relates to the technical field of high-voltage switches, in particular to a disconnecting link for preventing gap heating.
Background
With the rapid development of social economy, the social electricity consumption is increased year by year. In order to meet the requirements of electricity reliability and load increase, the distribution network adopts a hand-in-hand power supply mode, and the quantity of distribution network equipment is greatly improved while the quantity of power supply points is increased. In actual use, a heating fault phenomenon often occurs, and how to reduce the heating fault rate and improve the operation reliability of the distribution network becomes an important subject for the research of the distribution network field.
At present, the problem of heating of a disconnecting link has been paid great attention to practitioners in the power field, but most of related researches are oriented to the main network side, only qualitative analysis is carried out on heating phenomena, preventive measures and the like, and quantitative researches are carried out in the absence of related data;
when the disconnecting link is used, various different operation conditions are often faced, and the conditions of current change, environmental weather change and the like lead to frequent fluctuation of the temperature of the equipment wire clamp, so that repeated expansion and contraction are caused. The thermal expansion coefficient of copper metal is 17.7X10-6/DEG C, the thermal expansion coefficient of aluminum metal is 23×10-6/DEG C, and the difference of the copper metal and the aluminum metal causes different deformation of the two materials in the repeated thermal expansion and contraction processes, so that gaps are generated at the connecting positions to enable air to enter, the resistance is increased, and the equipment wire clamp heats. Meanwhile, as aluminum metal has creep property, deformation can be generated after long service time, and a copper-aluminum gap can be enlarged, so that the equipment wire clamp generates heat.
The lap joint of the drainage plate of the power equipment and the equipment wire clamp is fastened by adopting a double-hole bolt. Once the fastening is improper, when equipment is operated for a long time and is influenced by aspects such as wind blowing vibration, thermal expansion and contraction of bolts, corrosion and the like, the fastening bolts can loosen to lead to the reduction of the contact pressure between the drainage plate and the equipment wire clamp, the contact resistance is increased, and the heating hidden trouble is formed. The bolt gasket is used as an auxiliary iron piece and is easy to ignore, constructors can use the bolt gasket at will, and once the bolt gasket is used, the corrosion of the wire clamp can be caused.
The problem of heat generation caused by uneven field construction process cannot be solved.
The aluminum wire clamp is matched with the copper-aluminum transition piece, secondary punching processing is needed, and the requirements on the installation and construction process are high; and moreover, the copper-aluminum transition piece is connected with the isolating switch only through bolts, so that when the construction process is not standard or the isolating switch is used for a long time, a gap is easily generated between the copper-aluminum transition piece and the isolating switch, the contact resistance is increased, and the terminal is heated. The hidden trouble exists in the safe operation of the distribution network.
Disclosure of Invention
The utility model aims to provide a disconnecting link for preventing gap heating so as to solve the problems in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a knife switch for preventing gap heating, comprising:
the disconnecting link comprises a disconnecting link body, wherein a wiring assembly of the disconnecting link body is used for being connected with an external lead;
the wiring assembly is provided with a wiring hole, the front surface of the wiring assembly is a copper wiring part, the back surface of the wiring assembly is an aluminum wiring part, and the copper wiring part and the aluminum wiring part are integrally formed.
Friction grooves are uniformly formed in the front face and/or the back face of the wiring assembly around the wiring holes.
Compared with the prior art, the utility model has the beneficial effects that:
the device has simple structure, and the wiring assembly on the disconnecting link directly adopts the copper wiring part and the aluminum wiring part which are connected into a whole, so that the problem of gaps caused by unstable bolts or irregular operation due to the use of external copper-aluminum transition sheets can be avoided; the conditions of easy fracture, poor mechanical property, easy heating, poor electrical property and the like caused by welding can be avoided; the heat generation rate of the copper-aluminum transition terminal can be effectively reduced, and the operation safety of the distribution network is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic view of a wiring assembly according to the present utility model.
1. A knife switch body; 2. copper wiring parts; 3. an aluminum wiring part; 4. and a wiring hole.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
According to the characteristics of the copper-aluminum transition performance, the advantages and the disadvantages of the various types of equipment clamps and the like, and in combination with the temperature rise test results, the comparison results of the various types of equipment clamps are summarized as shown in the following table:
according to the comparison, the aluminum wire clamp is matched with the copper-aluminum transition piece, so that the aluminum wire clamp has better copper-aluminum transition performance, is simple and reliable in structure, has no bolt structure with wires, can avoid the problem of bolt loosening to generate heat, and is better in performance in a temperature rise test. Compared with a hot tinned copper terminal, the hot tinned copper terminal is more suitable for outdoor humid environment and has lower cost. Therefore, the method can be preferentially recommended to be used in the distribution network electrical equipment on the premise of standardizing the construction process.
From the above analysis, although the aluminum wire clip is better applicable in cooperation with the copper-aluminum transition piece, the aluminum wire clip has a certain problem, and the problem of frequent heating of the equipment wire clip cannot be completely solved. For example, the copper-aluminum transition piece is required to be subjected to secondary punching processing, and the connection between the aluminum wire clamp and the lead is also required to be subjected to crimping, so that the requirements on field installation and construction technology are high; and moreover, the aluminum wire clamps, the copper-aluminum transition piece and the isolating switch are connected through bolts, so that gaps are easy to generate after long-time use, and the contact resistance is increased.
Examples:
as shown in fig. 1-2:
the copper wiring part 2 and the aluminum wiring part 3 are integrally formed to form a wiring assembly with a block structure;
the front surface of the wiring assembly is made of copper, so that the wiring assembly is convenient to electrically connect with wires made of external copper;
the reverse side of the wiring assembly is made of aluminum, so that the wiring assembly is convenient to electrically connect with wires made of external aluminum;
the electric connection of the external copper-aluminum conductor is realized without using copper-aluminum transition sheets and the like.
The copper wiring portion 2 and the aluminum wiring portion 3 are integrally formed, gaps caused by expansion with heat and contraction with cold, corrosion, vibration and the like do not exist, the wiring assembly is prevented from heating, and hidden danger of safe operation of the distribution network is avoided.
The wiring assembly is provided with a wiring hole 4, and the wiring hole 4 is used for fixing an external wire on the wiring assembly.
Through evenly seting up the friction groove around wiring hole 4, the friction groove can play the locking effect with the cooperation of outside antiskid anti-loosening belt pad nut, improves and presss from both sides tight fixed effect.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.
Claims (1)
1. A knife switch for preventing gap from heating is characterized in that: comprising the following steps:
the disconnecting link comprises a disconnecting link body (1), wherein a wiring assembly of the disconnecting link body (1) is used for being connected with an external lead;
the wiring assembly is provided with a wiring hole (4), the front surface of the wiring assembly is provided with a copper wiring part (2), the back surface of the wiring assembly is provided with an aluminum wiring part (3), and the copper wiring part (2) and the aluminum wiring part (3) are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321020154.8U CN219738820U (en) | 2023-04-28 | 2023-04-28 | Knife switch capable of preventing gap from heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321020154.8U CN219738820U (en) | 2023-04-28 | 2023-04-28 | Knife switch capable of preventing gap from heating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219738820U true CN219738820U (en) | 2023-09-22 |
Family
ID=88053291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321020154.8U Active CN219738820U (en) | 2023-04-28 | 2023-04-28 | Knife switch capable of preventing gap from heating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219738820U (en) |
-
2023
- 2023-04-28 CN CN202321020154.8U patent/CN219738820U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |