On-load tapping switch hanger

Abstract

The invention relates to an on-load tapping switch hanger, which comprises a hanger top, supporting legs, pulleys, lifting hooks and a wire grip, wherein the hanger top is square, the central positionof the hanger top is provided with the pulleys, the four corners of the hanger top are fixedly connected with the supporting legs respectively, the lower part of each supporting leg is connected witha movable supporting foot which is used for fixedly connecting with the four lifting hooks on the upper part of a top cover of an on-load tapping switch respectively, the upper part of one of the supporting legs is fixedly provided with a pulley and the middle part is fixedly provided with the wire grip, a steel cable is connected with the wire grip through the pulleys on the hanger top and the pulleys on the supporting legs, and the tail end of the steel cable is connected with one lifting hook. The on-load tapping switch hanger can conveniently perform tapping switch examination and repairing on the body of a transformer and is not affected by environmental terrains, has the light weight and simple operation, saves human resources, shortens the time for the examination and repairing, has a simple structure, is portable, flexible and easy to mount quickly, and is applied to suspended cores of on-load tap changers of the main transformers of 220 KV and 110 KV.

Description

technical field [0001] The invention belongs to a support device for checking and repairing the internal mechanism of an on-load tap changer of a power transformer. Background technique [0002] In the power system, using an on-load tap changer to connect to the grid can stabilize the load center voltage, improve the operating conditions of electrical equipment and improve the quality of power supply voltage. The on-load tap changer is a voltage regulating device that ensures switching from one tap to another without cutting off the load current. At present, on-load tap-changers are widely used in power systems. Since the tap changer needs to operate continuously and cut off the load current, the operation is frequent. Moreover, due to reasons such as manufacturing process, installation, and operating conditions, the tap changer has a high failure rate, which accounts for a large proportion of transformer body failures. The traditional tap-changer is complex in mechanism ...

AI Technical Summary

Problems solved by technology

Since the tap changer needs to operate continuously and cut off the load current, the operation is frequent

Moreover, due to reasons such as manufacturing process, installation, and operating conditions, the tap changer has a high failure rate, accounting for a large proportion of transformer body failures.

The traditional tap-changer is complicated in mechanism and heavy in weight, which makes the maintenance work cumbersome. It usually uses a crane to operate, and many people are employed.

At the same time, due to the complex environment of the substation, the small open space and the large number of equipment, especially the indoor transformer, the crane is often unable to park and use, which leads to slowdown and waste of manpower, material and financial resources

Secondly, the power of the crane is difficult to control. Once the command is improper, it may cause damage to personnel and tap changers.

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