Three-sleeve elastic self-sealing safety valve

Abstract

The invention discloses a three-sleeve elastic self-sealing safety valve. The three-sleeve elastic self-sealing safety valve comprises a bonnet, a valve body, a valve seat, a valve flap, a guiding cylinder, a sleeve, a lower cooling fin, an upper cooling fin and a valve rod; an anti-blowing sleeve positioned above the lower cooling fin is arranged on the valve rod; an annular groove is arranged on the lower end surface of the anti-blowing sleeve; a retainer ring capable of extending into the groove in a matched manner is arranged on the upper surface of the lower cooling fin; a sealing cylinder capable of extending into the inner ring of the lower cooling fin is arranged on the inner side of the lower end surface of the anti-blowing sleeve; a limit sleeve positioned under the lower cooling fin and a lock sleeve matched with the upper surface of the valve flap in a compression joint manner are arranged on the valve rod; a conical block which has a small lower part and a large upper part is arranged in the center of the lower surface of the valve flap; an annular pressure bearing slot is formed in the lower surface of the valve flap; an elastic sealing ring positioned on the outer side of the pressure bearing slot is arranged on the lower surface of the valve flap. The three-sleeve elastic self-sealing safety valve has the advantages that the design is reasonable, the sealing performance is high, the lifting guiding and vertical stability are high, the adjustment sensitivity is high, the performance and stability of opening, setting and return actions of the valve are good, and the valve is particularly applicable to harsh working conditions such as high temperature and high pressure conditions.

Description

technical field [0001] The invention belongs to the technical field of valves, in particular to a three-set elastic self-sealing safety valve. Background technique [0002] The safety valve is a valve for safety protection. Its opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises and exceeds the specified value, it will automatically open. The medium pressure in the pipeline or equipment exceeds the specified value. Safety valves are automatic valves, mainly used in gas, liquid and heat pipe network systems, as steam boilers, pressure vessels, pipelines, control medium pressure does not exceed the specified value, and play an important role in protecting personal safety and equipment operation. [0003] The existing spring full-lift safety valve with cooling fins used in thermal systems, steam boilers, pressure steam containers, and pipelines has a simple structure, the valve...

AI Technical Summary

Problems solved by technology

When the working temperature of the medium is higher than 300°C, the action performance of the valve is very unstable and cannot meet the standard requirements; and the seal is also easy to leak, and users have relatively large opinions

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