CN201975317U - Copper aluminum composite bar for current-carrying conductor of medium-voltage isolating switch - Google Patents
Copper aluminum composite bar for current-carrying conductor of medium-voltage isolating switch Download PDFInfo
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- CN201975317U CN201975317U CN201120086931XU CN201120086931U CN201975317U CN 201975317 U CN201975317 U CN 201975317U CN 201120086931X U CN201120086931X U CN 201120086931XU CN 201120086931 U CN201120086931 U CN 201120086931U CN 201975317 U CN201975317 U CN 201975317U
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Abstract
The utility model discloses a copper aluminum composite bar for a current-carrying conductor of a medium-voltage isolating switch, which comprises an outer layer and an inner core in gapless connection with each other, wherein the outer layer is made of copper; the inner core is made of aluminum; the cross section of the outer layer is 15-25% of the total cross section of the outer layer and the inner core. The copper aluminum composite bar provided by the utility model and used for manufacturing the current-carrying conductor of the medium-voltage isolating switch has the advantages that the traditional copper bars and aluminum bars are replaced, the advantages of aluminum such as low cost and light weight and that of copper such as lower contact resistance are integrated, and the current-carrying capacity is large and close to an electrician copper bar owing to the influence of the skin effect, so that the composite bar is the best option for replacing the electrician copper bar.
Description
Technical field
The utility model relates to a kind of middle isolating switch current of pressing and uses the compound row of copper aluminium.
Background technology
As shown in Figure 1, the middle isolating switch of pressing comprises base 6, link insulator 4, two post insulators 3, inlet wire terminal block 2, outlet terminal block 7, connection 5 and conductive component 1, described outlet terminal block 7 and inlet wire terminal block 2 are installed on the described base 6 by a post insulator 3 respectively, the top of described conductive component 1 cross-over connection and described two post insulators 3, this conductive component 1 comprises fixed contact 12 and contact knife 11, described fixed contact 12 is fixed in the top of the post insulator 3 that outlet terminal block 7 is housed, one end of described contact knife 11 is coupling in the top of the post insulator 3 that inlet wire terminal block 2 is housed, and its other end is overlapped on the described contact 12.
Because copper has advantages such as stable electrochemical property, conductivity height, resistivity are low, at present, press in the known technology current (being contact knife) in the isolating switch to be processed into flute profile by copper bar usually and makes.
Isolating switch that uses on the existing market such as GW9-12 type are used for the electric power system of rated voltage as 10kV, rated current 400A or 600A, connect or the usefulness of insulating power supply as having under the non-loaded situation of voltage, its contact is by 90 ° of copper busbar bendings, and contact knife directly processes with copper busbar.
But copper is very poor especially in China in mondial reserves rareness.Use copper conductor cost height, be unfavorable for the resource of terminating an agreement, influence the development of power transmission and distribution industry.Aluminium also is the favorable conductive body, and abundant China's reserves, price steadiness.From the seventies in last century, be exactly an important economic policy for copper in China with aluminium, but because of the aluminium conductance lower, mechanical strength is low, poor rigidity, and welding performance is poor, contact resistance is big, and very easily oxidation in air, generate pellumina with insulating property (properties), cause resistance to increase, ampacity reduces, be prone to fault in the junction, have some technical barriers in the use, so consumption is less for a long time.
Summary of the invention
The purpose of this utility model is to overcome the defective of prior art and provides a kind of middle isolating switch current of pressing to use the compound row of copper aluminium, and the compound row of this copper aluminium makes full use of copper aluminium material material advantage separately, and its ampacity approaches copper bar simultaneously, and bending property is better than copper bar.
The purpose of this utility model is achieved in that
A kind of middle isolating switch current of pressing of the present utility model is used the compound row of copper aluminium, comprise skin and with the inner core of this skin seamless connectivity, the described outer copper material that adopts, described inner core adopts aluminium, described outer field sectional area account for described skin and inner core total sectional area 15～25%.
Above-mentioned middle pressure isolating switch current is used the compound row of copper aluminium, and wherein, described outer field thickness is even.
During making, the compound row of the utility model copper aluminium presses the current of isolating switch, traditional copper busbar and aluminium busbar have been replaced, the cost that it has aluminium concurrently is low, in light weight, the same with copper lower characteristics such as contact resistance, and since skin effect to influence current capacity big, near electrician's copper bar, be the optimal selection that substitutes electrician's copper bar.
Because the volume ratio that copper accounts among the compound row of copper aluminium is very little, can save rare copper resource in a large number, and proportion is little, can alleviate the weight of assembled electric equipment, reduces the caused bending stress of own wt, and is easy for installation.Its ampacity approaches copper bar, and bending property is better than copper bar, and its tensile strength, elongation, hardness all can satisfy the requirement of products such as assembled electric equipment.Improve the comprehensive utilization of nonferrous metal resource, improved the performance of product, reduced the cost of product.
The compound row of copper aluminium adopts continuous casting to connect gadolinium straight forming method technology, and copper, aluminium interface have really reached " metallurgical binding " by the certain thickness binder course of fused formation, the interface bond strength height, and copper aluminium is not stratified when shearing, bending, punching processing.The compound row's of copper aluminium mechanical performance and electrical property are as superior performances such as tensile strength, elongation, resistivity.The compound row's of copper aluminium performance is as shown in the table.
Description of drawings
Fig. 1 is existing middle structural representation of pressing isolating switch;
Fig. 2 is the schematic cross-section of the middle pressure isolating switch current of one of the utility model with the compound row of copper aluminium.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
See also Fig. 2, there is shown and press the schematic cross-section of isolating switch current in the utility model with the compound row of copper aluminium, the compound package of this copper aluminium draw together outer 81 and with the inner core 82 of these skin 81 seamless connectivities, outer 81 adopt copper material, inner core 82 adopts aluminium, outer 81 sectional area account for outer 81 and the total sectional area of inner core 82 15～25%, and outer 81 thickness is even, the compound row's of the utility model copper aluminium conductance is greater than 70%IACS.
Press the isolating switch current to prepare by following steps in the utility model with the compound row of copper aluminium:
1) with aluminium melting and heat preservation to 700～800 ℃, be cast in the copper pipe by airtight chute, cooling forms copper aluminium composite ingot;
2) under inert gas shielding, the copper aluminium composite ingot after the heating is rolled, through breaking down, finish rolling and integer, make the compound row of copper aluminium.
By the compound row's of copper aluminium binder course scanning electron microscopic observation, can see the diffusion layer at copper aluminium interface clearly, through measuring, obtain the diffusion layer overall width and be approximately 30um.The formation of diffusion layer is because at copper/aluminium solid-liquid compound tense, and the aluminium liquid of high temperature melts the copper surface, and obvious diffusion has taken place in copper aluminium, forms copper rich region.In this process, aluminium and copper react, and generate intermetallic compound, form transition zone.This shows that copper aluminium faying face reaches metallurgical binding.
The utility model is described in further detail below in conjunction with embodiment.
Adopt casting and rolling process to prepare the compound row of copper aluminium, the copper layer cross section is long-pending to account for 23% of total interfacial area, and compound row's conductivity is 82% of a standard copper conductance, compound row's width 60mm, thickness 6mm, thickness is even, faying face reaches metallurgical binding, and its performance index are as shown in the table:
The compound row punching of copper aluminium is become flute profile, and its inboard is embedded the pressure strip of flute profile, and an end of this pressure strip is equipped with screw and nut and fixes.The compound row of copper aluminium is used for the contact knife of isolating switch, the middle pressure isolating switch that is assembled into.
Ampacity is 750A during 70 ℃ of compound row's temperature rises of copper aluminium.
To pressing isolating switch to carry out performance test in above-mentioned, the direct current pressure decline method is adopted in the temperature rise experiment, carries out according to standard GB 1985-2004.Measuring current is 630A, power frequency 50Hz.Test result is: performance meets the demands.
Mechanical endurance, the mechanically actuated operation of test was carried out according to Shanghai City company standard Q/JDAC-2010, and experimental implementation frequency per minute 6 times has been done three cyclic tests, master switch number of times 2000 times.Test result is: performance meets the demands.
The DC decompression method is adopted in the major loop resistance measurement, and measuring current is 100A.Loop resistance satisfies the company standard regulation.
Embodiment 2
Adopt casting and rolling process to prepare the compound row of copper aluminium, the copper layer cross section is long-pending to account for total interfacial area 15%, and compound row's conductivity is 73% of a standard copper conductivity, compound row's width 40mm, thickness 4mm, thickness is even, faying face reaches metallurgical binding, and its performance index are as shown in the table:
The compound row of this copper aluminium is used for substituting the contact knife of GW9-12 type isolating switch, strikes out flute profile as the contact knife of conductive component, its inboard is embedded the pressure strip of flute profile, and an end of this pressure strip is equipped with screw and nut and fixes.The compound row of copper aluminium is used for the contact knife of isolating switch, the middle pressure isolating switch that is assembled into.
Ampacity is 510A during 70 ℃ of compound row's temperature rises of copper aluminium.
To pressing isolating switch to carry out performance test in above-mentioned, the direct current pressure decline method is adopted in the temperature rise experiment, carries out according to standard GB 1985-2004.Measuring current is 630A, power frequency 50Hz.Test result is: performance meets the demands.
Mechanical endurance, the mechanically actuated operation of test was carried out according to Shanghai City company standard Q/JDAC-2010, and experimental implementation frequency per minute 6 times has been done three cyclic tests, master switch number of times 2000 times.Test result is: performance meets the demands.
The DC decompression method is adopted in the major loop resistance measurement, and measuring current is 100A.Loop resistance satisfies the company standard regulation.
Above embodiment is only for the usefulness that the utility model is described, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.
Claims (2)
1. press in one kind the isolating switch current with the compound row of copper aluminium, comprise skin and with the inner core of this skin seamless connectivity, it is characterized in that the described outer copper material that adopts, described inner core adopts aluminium, described outer field sectional area account for described skin and inner core total sectional area 15～25%.
2. press the isolating switch current with the compound row of copper aluminium in as claimed in claim 1, it is characterized in that described outer field thickness is even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120086931XU CN201975317U (en) | 2011-03-28 | 2011-03-28 | Copper aluminum composite bar for current-carrying conductor of medium-voltage isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120086931XU CN201975317U (en) | 2011-03-28 | 2011-03-28 | Copper aluminum composite bar for current-carrying conductor of medium-voltage isolating switch |
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| Publication Number | Publication Date |
|---|---|
| CN201975317U true CN201975317U (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120086931XU Expired - Lifetime CN201975317U (en) | 2011-03-28 | 2011-03-28 | Copper aluminum composite bar for current-carrying conductor of medium-voltage isolating switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608427A (en) * | 2012-03-15 | 2012-07-25 | 河南中孚实业股份有限公司 | Method for measuring resistance of crimped section of copper and aluminum composite row |
| CN102709072A (en) * | 2011-03-28 | 2012-10-03 | 上海电气集团股份有限公司 | Copper-aluminum composite bus of current-carrying conductor of medium-voltage isolation switch and preparation method thereof |
-
2011
- 2011-03-28 CN CN201120086931XU patent/CN201975317U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709072A (en) * | 2011-03-28 | 2012-10-03 | 上海电气集团股份有限公司 | Copper-aluminum composite bus of current-carrying conductor of medium-voltage isolation switch and preparation method thereof |
| CN102608427A (en) * | 2012-03-15 | 2012-07-25 | 河南中孚实业股份有限公司 | Method for measuring resistance of crimped section of copper and aluminum composite row |
| CN102608427B (en) * | 2012-03-15 | 2015-09-02 | 河南中孚实业股份有限公司 | A kind of measuring method of Copper-Aluminum compound row crimp segment resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110914 |