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Insulating tube bus-bar connecting device and connecting method thereof

A busbar connection and connection method technology, applied in the direction of connection insulation, connection contact material, shape memory material connection, etc., can solve the problems of reducing the safety and reliability of electrical equipment, low installation efficiency, large power loss, etc., to reduce eddy current and The effect of tip discharge, reduction of installation work intensity, safe and stable operation

Inactive Publication Date: 2016-06-08
湖北兴和电力新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the connections between pipe busbars in the industry are made of separate joints, and then fastened with bolts or welded with C-shaped steel pipes to tightly connect the two pipe busbars. These connection methods have the following problems: The joint is large in size, consumes a lot of metal materials, low installation efficiency, high production cost, and takes up a lot of space for installation. The steel material used is easy to form eddy currents, causing large power loss, and the surface of the joint is irregular and uneven, which is inconvenient for insulation treatment and reduces The safety and reliability of electrical equipment operation
[0003] The Chinese utility model patents with application numbers 201120017519.2 and 201420428587.1 disclose a method of interference fit using crimping to connect, which essentially achieves local interference fit through local mechanical deformation of the conductor surface, and its effective contact surface is not large. When working with electricity for a long time, it is easy to generate heat, and in the crimping process, the crimping part of the insulating tube busbar is prone to cracks and damages, which makes the joints prone to heating when the power is on, and this connection method is not firm. After a long time, the elastic stress caused by mechanical deformation gradually decreases, and it is easy to loosen or fall off

Method used

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  • Insulating tube bus-bar connecting device and connecting method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 , this embodiment discloses a connection device for insulating pipe busbars, which includes two insulating pipe busbars of the same specification, the outer layer of the insulating pipe busbar core material 1 is covered with an insulating pipe busbar insulating layer 2, and the two ends of the insulating pipe busbar core material 1 According to the diameter of the core material, there are 2 to 20 cm exposed ends. The inner diameter of the pipe bus joint 3 is smaller than the outer diameter of the insulating pipe bus core material 1, and the inner diameter of the pipe bus joint is the same as the outer diameter of the insulating pipe bus core material. The difference is 1 / 100~1 / 2000 of the outer diameter of the core material of the insulating tube bus bar. After heating and expanding the tube bus bar joint, insert the end of the insulating tube bus bar into the heated tube bus bar joint, and then cool it. After the interference fit is completed, an insul...

Embodiment 2

[0027] This embodiment discloses a connection method of the pipe bus connection device described in Embodiment 1, which includes the following steps,

[0028] (1) Clean the two ends of the insulating pipe busbar and the inner and outer surfaces of the pipe busbar joints, polish the burrs, and perform tinning treatment;

[0029] (2) Heat and heat-preserve the pipe bus joints at a certain temperature, and adjust and control the heating and heat preservation temperature and time according to the size of the interference and the expansion of the pipe bus joints;

[0030] (3) When the inner diameter of the pipe busbar joint expands to an inner diameter greater than the outer diameter of the pipe busbar under the action of heating and heat preservation, stop heating and heat preservation, clamp and fix the middle part of the pipe busbar joint with a tool clamp, and quickly insert the insulating pipe busbar connection part into the into the pipe bus connector;

[0031] (4) Cool the ...

Embodiment 3

[0034] The insulating tube bus conductor is selected as Φ100 / 90 copper tube with an outer diameter of 100mm and an inner diameter of 90mm; the intermediate joint is a Φ110 / 99.8 copper tube with an outer diameter of 110mm and an inner diameter of 99.8mm. The inner and outer surfaces of the joints are tin-plated, and the thickness of the tin-plated layer is 2-10 μm. The coefficient of thermal expansion of pure copper is 17.7×10 -6 / °C; put the metal copper tube of the intermediate joint into the heating device, and the temperature rises to 300 °C, then the inner diameter of the metal copper tube of the intermediate joint is: 99.8+ (99.8×17.7×10 -6 / °C×300°C)=100.33 (mm), 100.33mm is 0.33mm larger than the outer diameter of the insulating pipe busbar conductor of 100mm, and the end of the insulating pipe busbar conductor is conveniently inserted into the inner surface of the metal copper pipe of the intermediate joint. After cooling, the interference amount is : (100-99.8)÷2=0.1...

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Abstract

The invention discloses an insulating tube bus-bar connecting device and a connecting method thereof. The connecting device comprises two insulating tube bus-bars and a tube bus-bar connector which is a tubular connector, the inner diameter of the tube bus-bar connector is small than the outer diameter of an insulating tube bus-bar core material, and the outer diameter of the tube bus-bar connector is larger than the outer diameter of the insulating tube bus-bar core material. The connecting method comprises the steps that 1, the connection parts of the two ends of the insulating tube bus-bars and the inner surface and outer surface of the tube bus-bar connector are polished clean and subjected to tinning treatment; 2, the tube bus-bar connector is subjected to heating and heat preservation treatment at certain temperature, and heating and heat preservation treatment are stopped when the inner diameter of the tube bus-bar connector is expanded to be larger than the outer diameter of the tube bus-bars under the action of heating and heat preservation treatment; 3, the middle of the tube bus-bar connector is fixedly clamped through a tool clamp, the connection parts of the insulating tube bus-bar ends are inserted into the tube bus-bar connector; 4, the joints of the tube bus-bar connector and the insulating tube bus-bar ends are cooled; 5, insulating treatment is conducted on the tube bus-bar connector and the joints of the tube bus-bar connector and the insulating tube bus-bar ends after cooling is conducted.

Description

technical field [0001] The invention relates to a connecting device and a connecting method for an insulating pipe busbar, in particular to a connecting device and a connecting method for heating and interference fitting of an insulating pipe busbar. Background technique [0002] With the progress and development of electric power technology, high current transmission of electric energy is becoming more and more common, resulting in the widespread application of insulated tube busbars with large current carrying capacity. Because the insulating pipe busbar is a hard conductor, it is produced section by section in the factory, and then shipped to the power transmission and transformation site for installation and connection, with many intermediate connections. At present, most of the connections between pipe busbars in the industry are made of separate joints, and then fastened with bolts or welded with C-shaped steel pipes to tightly connect the two pipe busbars. These conne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R4/60H01R4/01H01R4/70H01R4/72
CPCH01R4/60H01R4/01H01R4/70H01R4/72
Inventor 周锦平叶防修尹建明
Owner 湖北兴和电力新材料股份有限公司
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