Process for holding down transformer body

Abstract

The invention discloses a process for holding down a transformer body. The process is characterized by comprising the following steps that: (1) clamps at the two sides span three phase transformer bodies and are parallel to each other; 2-4 hydraulic cylinders are arranged between the clamp at each side and each phase transformer body in the axial direction; and the hydraulic cylinders arranged on the clamps at the two sides are symmetrical with each other; (2) each hydraulic cylinder is connected with a hydraulic station via a pipeline and an electrical apparatus control system in the hydraulic station is used for unitedly controlling the pressure of each hydraulic cylinder to ensure the three phase transformer bodies to simultaneously bear the same pressure; (3) after the three phase transformer bodies are held down to the design height, the electrical apparatus control system in the hydraulic station is used for maintaining pressure of each hydraulic cylinder; insulating supporting plates are filled in the vacancy of the clamps and the transformer bodies; and the gaps in axial height of the transformer bodies are filled; and (4) finally the electrical apparatus control system in the hydraulic station is used for relieving pressure of each hydraulic cylinder and dismantling the hydraulic cylinders.

Description

technical field [0001] The invention relates to a compacting process of a transformer body. Background technique [0002] After the body of the three-phase winding of the transformer is dried in the vapor phase, the assembled body needs to be compacted in the axial direction to ensure that the height and size of the three-phase winding are uniform. The traditional compaction method ( figure 1 and figure 2 ) means that each phase body is compacted separately. During the compaction process, the height dimension is measured at any time. It is required to ensure not only the designed height of the body, but also the uniform force of the body in the circumferential direction. After the body is pressed, the product needs to be covered in time to shorten the time that the body is exposed to the atmosphere and prevent moisture. [0003] Traditional compaction methods have two disadvantages: [0004] First, the three-phase axial height dimension of the compactor body is not easy ...

AI Technical Summary

Problems solved by technology

[0004] First, the three-phase axial height dimension of the compactor body is not easy to control. Each phase of the compactor body relies on the pressure nail (screw) to tighten the four disc springs to compress and bear the force, and the deformation of the disc springs in the compression cylinder sleeve Quantity cannot be observed

[0005] Second, when the device body is pressed phase by phase, the time for the device body to be exposed to the atmosphere will be prolonged, and the surface moisture absorption of the insulating parts will be increased.

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