A tool and method for live replacement of 500kv tension insulator strings in substations
A technology of tension insulator strings and insulator strings, which is applied in the direction of overhead lines/cable equipment, etc., can solve the problems of live operation difficulties in replacing 500kV tension insulator strings in substations, reduce over-traction, improve safety, and reduce construction stress Effect
Active Publication Date: 2017-07-21
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the above-mentioned prior art and provide a tool and method for live replacement of 500kV strain insulator strings in substations, so as to solve the difficult problem of live operation in replacing 500kV strain insulator strings in substations
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0018] Such as figure 1 As shown, the tool of the present invention for live replacement of 500kV strain insulator strings in a substation includes a connecting plate fixture 1, an insulator upper clamp 3, a single-ended screw rod 4 (41, 42), an insulating pulley 11, and an insulating pull rod 2 (21, 22) . The connecting plate fixture 1 is fixed on the side connecting plate of the insulator string conductor, the insulator upper clamp 3 is fixed on the second insulator of the insulator string 5 to be replaced, and the single-ended screw rod 4 (41, 42) is arranged on the connecting plate fixture 1 and On both sides of the clamp 3 on the insulator, the insulating pulley 11 is arranged on the connecting plate fixture 1, and the two ends of the insulating pull rod 2 (21, 22) are respectively connected to the connecting plate clamp 1 and the structu...
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The invention relates to a tool and a method for live replacement of 500kV strain insulator strings of substations. The tool comprises a yoke plate fixture, an upper insulator clamp, single-head screws, an insulating block, and insulating pull rods. The yoke plate fixture is fixed to an insulator string conductor side yoke plate. The upper insulator clamp is fixed to a second insulator of an insulator string to be replaced. The single-head screws are connected to the two sides of the yoke plate fixture and the upper insulator clamp. The insulating block is disposed on the yoke plate fixture. The insulating pull rods are connected with the yoke plate fixture and a frame. According to the tool and the method for live replacement of 500kV strain insulator strings of substations provided by the invention, no insulator cradle is used in live replacement of insulators, an insulator string is replaced through a micro over-traction method, the operation over-traction length is reduced from the original 150-200mm to 15mm, and the amount of over-traction of line tightening operation is greatly reduced. Therefore, the conductor construction stress in line tightening is greatly reduced, and the degree of operation safety is improved.
Description
technical field [0001] The invention relates to a tool and a method for replacing an insulator string, in particular to a tool and a method for replacing a 500kV tension insulator string in a substation with electricity. Background technique [0002] With the construction and development of the 500kV ultra-high voltage power transmission and transformation system, the 500kV power grid has become the link and artery of the national networking, and it is also the main skeleton of the regional power grid, which plays a pivotal role in the safe and stable operation of the entire power grid. The 500kV substation is also the connection dominance point of the 500kV system. From the perspective of the safe operation requirements of the power grid and the structural form of the power grid, live work in the substation is necessary and frequent, and the replacement of the strain insulator string is a regular work. According to the current situation of live work in substations, 500kV te...
Claims
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IPC IPC(8): H02G1/02
Inventor 邓科万文杰魏秋累张秋实
Owner STATE GRID CORP OF CHINA