Soft sealing safety valve

Abstract

The invention relates to a soft sealing safety valve. The soft sealing safety valve comprises a barrel-shaped valve body, a left blocking cap and a right blocking cap, wherein the left blocking cap and the right blocking cap are correspondingly fixed to the left end and the right end of the valve body; the valve body is provided with a first oil port and a second oil port; a tapered valve element is arranged in the middle of an inner cavity of the valve body, a spring is arranged between the tapered valve element and the left blocking cap, and a valve base is fixed between the tapered valve element and the right blocking cap; a stepped hole is formed in the valve base, a soft sealing ring is fixed into the stepped hole through a screw plug, and the screw plug is provided with a through hole along the central axis of the screw plug; the tip of the tapered valve element stretches into an inner hole of the soft sealing ring; the first oil port communicates with the right end of the stepped hole of the valve base, and the second oil port communicates with the portion, between the tapered valve element and the left blocking cap, of the inner cavity of the valve body. The soft sealing safety valve has the advantages of being simple in structure, safe, reliable, good in sealing effect and adjustable in switch-on pressure.

Description

technical field [0001] The invention relates to a control valve, in particular to a soft-seal safety valve capable of realizing zero leakage. Background technique [0002] In the hydraulic system, the safety valve is a commonly used automatic control valve. When it is matched with a hydraulic lock or a hydraulic cylinder, it can play a role in pressure relief when the pressure chamber of the hydraulic component becomes larger due to temperature rise. The traditional safety valve usually adopts a hard seal structure, because it will produce a certain amount of leakage, the sealing effect is poor, and the pressure is not easy to maintain. For this reason, those skilled in the art have developed a safety valve with a soft seal structure to solve the problems existing in the safety valve with a hard seal structure. However, the existing safety valve with a soft seal structure has pressure drops after repeated openings, and the gasket is damaged, resulting in leakage. , Poor rel...

AI Technical Summary

Problems solved by technology

The traditional safety valve usually adopts a hard seal structure, because it will produce a certain amount of leakage, the sealing effect is poor, and the pressure is not easy to maintain.

For this reason, those skilled in the art have developed a safety valve with a soft seal structure to solve the problems existing in the safety valve with a hard seal structure. However, the existing safety valve with a soft seal structure has pressure drops after repeated openings, and the gasket is damaged, resulting in leakage. , poor reliability and other issues

Especially in the field of military and aerospace, the outrigger circuit of the new projectile / arrow launch platform has high requirements for precision maintenance, and the existing safety valves cannot meet the requirements of zero leakage and adjustable opening pressure.

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