A pressure relief valve for a power transformer and a power transformer

By designing a pressure relief valve with multi-component coordinated linkage, the problems of inaccurate pressure relief threshold control and sealing failure in traditional pressure relief devices are solved, achieving safe pressure relief and reliable seal reset, and improving the safety protection capability of power transformers.

CN224433524UActive Publication Date: 2026-06-30JIANGSU HUASHENG ELECTRIC POWER TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIANGSU HUASHENG ELECTRIC POWER TECHNOLOGY CO LTD
Filing Date
2025-08-18
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional pressure relief devices suffer from low accuracy in controlling the pressure relief threshold, are prone to malfunction, are easily jammed during the resetting of the sealing plate, lack a stable positioning and guiding structure, leading to sealing failure and an inability to reliably respond to pressure changes.

Method used

It adopts a multi-component collaborative design, including a fixing ring, inner frame, outer frame, sealing plate, elastic component, magnetic plate and central shaft, etc., to achieve safe pressure relief and reliable sealing reset by accurately responding to changes in internal pressure.

Benefits of technology

It achieves precise pressure relief threshold control, avoids malfunctions, ensures that the sealing plate is fully open, reduces component wear, improves sealing reliability and stability, ensures rapid sealing after pressure recovery, and enhances the overall performance of the device.

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Abstract

This utility model discloses a pressure relief valve for power transformers and a power transformer itself, belonging to the field of transformer technology. Through the coordinated operation of a fixed ring, inner frame, outer frame, and multiple components, it responds to internal pressure changes to achieve safe pressure relief and seal reset. Under normal conditions, the sealing plate seals with the fixed ring under the action of the elastic component, and the outer frame is positioned by the ball clamp. When the pressure reaches a set value, the sealing plate drives the second magnetic plate to move, disengaging from the bending plate clamp and attracting the first magnetic plate, thus completely detaching the sealing plate from the fixed ring to relieve pressure. After the pressure drops, all components reset and restore the seal. This valve has advantages such as precise pressure response, stable linkage, good seal reset performance, compact structure, and strong adaptability, meeting the needs of complex operating conditions and ensuring the safe operation of the transformer.
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