CN203351226U - Current-carrying bus bar inside airtight chamber of gas insulation switch device and gas insulation switch device utilizing same current-carrying bus bar - Google Patents

Abstract

The utility model provides a current-carrying busbar in a sealed gas chamber on a gas-insulated switchgear and a gas-insulated switchgear using the current-carrying busbar, a copper tube busbar main body (1), and both ends of the copper tube busbar main body have flatten The flattened part of the part (2) is provided with a piercing circular hole (3). Said piercing circular holes (3) are located on the copper pipe bus bar main body (1) and are close to the two ends of the flattened part (2), preferably with a diameter of 5-20 mm. Another aspect of the utility model provides a gas insulated switchgear, including any one of the above-mentioned current-carrying busbars. The utility model saves copper and improves the peak withstand capacity, 2-3 times, greatly reducing the impact on the environment.

Description

Current-carrying busbar in the airtight chamber of gas-insulated switchgear and gas-insulated switchgear using the current-carrying busbar

technical field

The utility model belongs to the technical field of electric power products, and in particular relates to a tubular copper busbar used in a gas chamber of a gas insulated switchgear to carry current in a power distribution circuit. the

Background technique

At present, the current-carrying bus bar in the gas chamber of conventional high-voltage gas-insulated switchgear is a rod-shaped copper bus bar. The "skin" effect of this bus bar when carrying current makes the tubular copper bus bar a substitute. While meeting the needs of switchgear, tubular copper busbars can greatly reduce the amount of copper used, reduce product costs and reduce the impact on the environment. the

However, the existing current-carrying bus bars still need to be improved in terms of saving copper and improving peak withstand capacity. The utility model provides such a current-carrying busbar. the

Utility model content

One aspect of the utility model provides a current-carrying busbar in a sealed gas chamber on a gas insulated switchgear, a copper tube busbar main body, and both ends of the tubular copper busbar have flattened parts. The flattened parts are provided with opposite round holes . the

According to a preferred embodiment of the present utility model, the said piercing circular holes are located on the main body of the copper pipe bus bar close to the two ends of the flattened part. The diameter of the piercing hole is preferably 5 to 20 millimeters. the

Another aspect of the present utility model provides a gas insulated switchgear, including any one of the current-carrying busbars described above. the

The current-carrying bus bar of the utility model saves copper material, improves the peak tolerance capacity by 2 to 3 times, and greatly reduces the impact on the environment. the

Description of drawings

Fig. 1A-1C is the bus bar L1-L3 of the first configuration of the present utility model respectively;

2A-2C are busbars L1-L3 of the second configuration of the present invention, respectively. the

Detailed ways

Hereinafter, with reference to the accompanying drawings, a specific description of alternative embodiments of the present invention is given. the

As shown in Figures 1A-1C are busbars L1-L3 of the first configuration of the utility model; Figures 2A-2C are busbars L1-L3 of the second configuration of the utility model respectively. The main body 1 of the copper pipe busbar undergoes the first process - cold bending processing to form a three-dimensional path; then the second process - the flattened part 2 at both ends; after the flattened part at both ends, the third process - punching oblong holes and alignment head; finally carry out the fourth process to process the piercing round hole 3 at the proximal end of the flattened parts at both ends. the

Parameters such as the outer diameter and wall thickness of the copper pipe busbar main body 1 are determined through rigorous simulation calculations relative to the rated current to be carried and the short-term peak current to withstand. When carrying the same rated current, using copper tube busbar instead of copper rod busbar can save 1/3 of copper material. When withstanding the peak current, the withstand capacity of the copper tube busbar is 2 to 3 times that of the copper bar busbar. the

The design of the flattened parts 2 at both ends, compared with the connection between the flattened parts of the copper rod and the corresponding conductors, has a larger heat dissipation area and saves 1/3 of the copper material. the

The size range of the piercing hole 3 is 5-20 mm in diameter, and it is very important to set it at the proximal end of the flattened part. The functionality of the piercing hole 3 can be summarized as two points:

One, before the gas chamber is filled with SF6 gas, the airtight process can use the pair of piercing holes 3 to extract the air in the copper pipe to ensure the purity of the SF6 gas in the gas chamber. the

Second, when the equipment is in operation, the pure SF6 gas in the air chamber can enter the copper pipe busbar through the piercing round hole 3. The alternating circulation of SF6 gas inside and outside the copper tube busbar can take away part of the heat generated by the busbar, thereby reducing the temperature rise of the busbar. the

Based on the above characteristics, the reasonable configuration of the main body 1 of the copper tube busbar, the flattened parts 2 at both ends and the piercing round hole 3 makes the current-carrying busbar of the present utility model have the following obvious advantages compared with the copper rod busbar:

1) The cross-sectional area of copper material can be saved by 30% comprehensively. the

2) The weight of copper material can be saved by 1/3 comprehensively. the

3) The peak tolerance ability is increased by 2 to 3 times. the

4) While saving costs, greatly reduce the impact on the environment. the

Similarly, the gas insulated switchgear adopting the current-carrying bus bar of the present invention also has the above-mentioned advantages. Adopting the gas insulated switchgear of the current-carrying bus of the utility model, other structures do not need to be changed, therefore, no detailed description will be given in the utility model. the

Although the preferred embodiment of the utility model and accompanying drawings are disclosed for the purpose of illustration, those skilled in the art can make various replacements, Variations and retouching. Therefore, the utility model should not be limited to the content disclosed in the preferred embodiments and drawings, and the scope of protection of the utility model should be defined by the appended claims. the

Claims (4)

1. A current-carrying busbar in a sealed gas chamber on a gas insulated switchgear, a copper tube busbar main body (1), characterized in that: both ends of the copper tube busbar main body have flattened parts (2) and the flattened parts are provided with Pierce through the round hole (3). the 2. The current-carrying busbar in the airtight chamber of the gas insulated switchgear according to claim 1, characterized in that: the said piercing circular hole (3) is close to the flattened part (2) on the main body (1) of the copper tube busbar ) at both ends. the 3. The current-carrying bus bar in the airtight chamber of the gas insulated switchgear according to claim 1 or 2, characterized in that: the diameter of the opposite circular hole (3) is 5-20 mm. the 4. A gas insulated switchgear, characterized in that it comprises the current-carrying busbar according to any one of claims 1-3. the

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