Gas-insulated and metal-enclosed power transmission line
A gas-insulated metal and transmission line technology, applied in the installation of cables and cables in underground pipelines, etc., can solve the problems of insulating gas leakage, deviation of pipeline sealing performance, affecting the normal use of lines, etc., and achieve the effect of preventing leakage.
Inactive Publication Date: 2017-06-20
上海华东电器集团电气有限公司
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Problems solved by technology
[0004] However, two adjacent pipes are connected by flanges, and when the flanges are not processed with high precision and the surface is uneven, it will cause a certain deviation in the sealing performance between the two adjacent pipes, which will lead to circuit breakers. The overall sealing performance is not good, and the insulating gas inside is prone to leakage, which affects the normal use of the line.
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[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0038] A gas-insulated metal-enclosed transmission line, with reference to figure 1 , including several pipeline units, fixed seats 7 and fixed rings 4 for fixing the pipeline units on the fixed seats 7, the pipeline units include an annular shell 2, flanges 5 arranged at both ends of the shell 2, The conductor 1 located in the casing 2, the insulating support column 3 arranged on the inner wall of the casing 2 for supporting the conductor 1, and the insulating compressed gas arranged between the casing 2 and the conductor 1; wherein, there are four insulating support columns 3 , divided into two groups, respectively at the positions of the inner wall of the housing 2 close to the two flanges 5; the compressed insulating gas is compressed air.
[0039] refer to Figure 6 , The fixing ring 4 includes a lower ring body 42 fixed on the fixing seat 7 and an upp...
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The invention discloses a gas-insulated and metal-enclosed power transmission line comprising a number of pipeline units, wherein each pipeline unit comprises a shell body, flange plates positioned on two ends of the shell body, a conductor positioned in the shell body, an insulating support column positioned in the shell body and used for supporting the conductor and insulating compressed gas placed between the shell body and the conductor; a sealing ring adhered to outer annular surfaces and inner walls of the shell bodies is arranged between two neighboring shell bodies, two ends of the sealing ring are provided with clamping bars which protrude beyond the outer annular surfaces, and clamping grooves that are matched with the two clamping bars are arranged between the two neighboring shell bodies. Via use of the sealing ring, air-tightness between the two neighboring pipeline units can be effectively improved.
Description
technical field [0001] The present invention relates to a power transmission line, more specifically, it relates to a gas-insulated metal-enclosed power transmission line. Background technique [0002] At present, the traditional power transmission method is mainly composed of overhead lines and cable lines. Overhead lines have defects such as large line loss, being easily affected by environmental and climate factors, and consuming a lot of space and land resources. Although cable lines can be used for urban underground power transmission, but It also has the problems of large line loss and large capacitive current, and the cross-sectional area of the current cable line has almost reached the limit of technology and economy, the carrying capacity is limited, and it must be equipped with a reactive power compensation device and a cooling system. [0003] In view of the above problems, the Chinese patent application No. 201420093317.X discloses a gas insulated electrical ci...
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IPC IPC(8): H02G9/06
CPCH02G9/06
Inventor 郑碎德
Owner 上海华东电器集团电气有限公司