Strong-corrosion-resisting spring safety valve

Abstract

This invention relates to a strong corrosion spring type safety valve ,in order to solve the problem that safety valve of existing the spring-back-pressure influence and corrosion ,it includes the valve body, valve cover and valve caps that connect with each other one by one from bottom to top , the valve seat and valve petal, the recoil disc covered with T positioning disk in periphery, stem, adjusting screw and screw cap connected with each other one by one from bottom to top; between the mouth of valve cover and adjusting screw is set a locking nut, the stem under adjusting screw sets spring and spring seat ,the peripheral of valve seat tope distributes adjusting ring by thread, the valve body is set with positioning screw to fix adjusting ring; The top of recoil disc is set with support bushings, between support bushings and disc set distributes a layer or multi-layer corrosion-resistant materials made of corrugated pipe. Therefore , its overcome back pressure and prevent the valve springs and other parts within the media corrosion, and make use of steam and maintenance, and when the valve opening marked urgent spray to high-lift, reliable performance and durability of good advantages. The pressure can start out in accordance with the regulations, intended to prevent excretion from the pressure vessel and the pressure increased, achieve the required discharge pressure valve immediately shut down.

Description

technical field [0001] The invention relates to a safety valve safety valve, in particular to a strong corrosion-resistant spring type safety valve. Background technique [0002] Spring safety valve is a protective device for pressurized boilers, containers and pipelines. It does not rely on electrical external force, but uses spring force to balance the pressure of the inlet medium. When the equipment pressure exceeds the set value, the valve opens to discharge, and the overpressure medium drops to the specified value, and the valve closes. It is a protection device to ensure the normal operation of the pressurized system. [0003] Domestic safety valves all adopt Soviet technology in the 1950s. The Ministry of Machinery once organized the production of safety valve companies to sort out the drawings for low-pressure and medium-temperature boilers, and they have been used by manufacturers for unified use. The performance and quality cannot meet the requirements of the 1970s...

AI Technical Summary

Problems solved by technology

Once the contact surface of the guide disc and the recoil disc is corroded by the medium, its flexibility will be greatly reduced, which will seriously affect the opening performance

In particular, once the strong corrosive medium invades the spring barrel, the spring will be corroded and lose the balance of the spring force, and the safety valve will lose its function.

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