Construction method for transforming foundation when disconnecting switch is replaced
A technology of isolation switch and construction method, applied in switchgear, electrical components and other directions, can solve the problems of long time, at least one month, increase the economic loss of users, affect the stability of the power grid, etc., to achieve low cost and reduce economic loss , the effect of convenient operation
Active Publication Date: 2014-10-01
STATE GRID CORP OF CHINA +1
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Problems solved by technology
In addition, the old isolating switch is supported by a triangular foundation, which occupies a large area, and the original manufacturer no longer produces this kind of isolating switch, so it is necessary to change the triangular foundation to an independent foundation when replacing the new isolating switch
When carrying out this construction, it is necessary to remove the lead wires, remove the old isolating switch, remove the base foundation, make a template, tie the ribs to lay the foundation, maintain the foundation, install a new isolating switch, primary and secondary wiring, and press the equipment , commissioning, transmission and power transmission, etc., so the power outage construction period is long, at least 1 month, which will undoubtedly affect the stability of the power grid operation and increase the economic loss of users
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[0013] The construction method for foundation reconstruction provided by the present invention when replacing a disconnector will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0014] Such as figure 1 — image 3 As shown, the foundation transformation construction method provided by the present invention when replacing the isolating switch includes the following steps in order:
[0015] 1) Under the condition that the equipment is running without power failure, the operating mechanism box 2 of the running old isolating switch and the lower part of the old triangular foundation 4 are welded and fixed together by using a plurality of horizontally arranged channel steels 1;
[0016] 2) cutting part of the fixed bracket 3 located below the operating mechanism box 2, so that the operating mechanism box 2 is suspended in the air;
[0017] 3) manually excavating the soil below the operating mechanism box 2 to the original base...
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Provided is a construction method for transforming a foundation when a disconnecting switch is replaced. The method comprises the steps that a plurality of pieces of channel steel are utilized for welding and fixing a fixed support at the lower portion of an operation mechanism box of an old operating disconnecting switch and the lower portion of an old triangle foundation; the fixed support at the lower portion of the operation mechanism box is cut, and the operation mechanism box is made to be suspended and hoisted; soil below the operation mechanism box is excavated manually to an original foundation layer; holes are drilled and steel bars are embedded in the original foundation layer, moulding is carried out on the original foundation layer, and an independent foundation used for a new disconnecting switch is manufactured according to a drawing; after power outage is approved, firstly the multiple pieces of channel steel and the operation mechanism box are removed, then the new disconnecting switch is installed on the independent foundation, and finally the old triangle foundation is removed to finish the whole construction process. The old disconnecting switch and the old triangle foundation can be replaced with the new disconnecting switch and the new independent foundation in the power outage period as short as possible, so that economic losses of users and power supply departments caused by power outage are reduced greatly; in the construction process, design is reasonable and simple, the cost is low and operation is convenient.
Description
technical field [0001] The invention belongs to the technical field of electric power facility construction, and in particular relates to a foundation reconstruction construction method when an isolating switch is replaced. Background technique [0002] In substations, some 500kV disconnectors need to be replaced due to their long service life, which has exceeded the specified life span of 20 years. In addition, the old isolating switch is supported by a triangular foundation, which occupies a large area, and the original manufacturer no longer produces this kind of isolating switch. Therefore, it is necessary to change the triangular foundation to an independent foundation when replacing the new isolating switch. When carrying out this construction, it is necessary to remove the lead wires, remove the old isolating switch, remove the base foundation, make a template, tie the ribs to lay the foundation, maintain the foundation, install a new isolating switch, primary and sec...
Claims
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IPC IPC(8): H02B3/00
Inventor 张建中郭冰
Owner STATE GRID CORP OF CHINA