Explosion-proof valve for engine

Abstract

The invention belongs to the technical field of valves and particularly discloses an anti-explosion valve for an engine. The anti-explosion valve comprises a conical sleeve, an exhaust pipe, swing pieces, a sliding bearing, a spring and a clamp spring. The conical sleeve is fixedly connected in a cylindrical hole in the end face of a valve core. The center of the conical sleeve is provided with acircular cone groove. The exhaust pipe is slidably installed in a center hole of the sliding bearing. One end of the exhaust pipe is provided with a set of swing pieces. The middles of the swing pieces are hinged to one end of the exhaust pipe. A torsion spring is arranged at the hinged joint. Arc-shaped protrusions are arranged at one ends of the swing pieces. The set of swing pieces form a circular cone shape in a surrounding mode. According to the anti-explosion valve, the swing pieces at the end of the exhaust pipe penetrate through the conical sleeve, the face of the circular cone groovein the conical sleeve extrudes the arc-shaped protrusions on the swing pieces. The swing pieces swing. The circular cone groove of the conical sleeve deforms and expands to be open, then high-pressuregas is discharged through the exhaust pipe, and finally the valve is opened while the anti-explosion valve resists fiercely exploding pressure.

Description

technical field [0001] The invention belongs to the technical field of valves, in particular to an explosion-proof valve for an engine. Background technique [0002] At present, commonly used engines, especially pneumatic engines, use premixed intake air during use, so the intake pipe is filled with flammable gas. If backfire occurs, the combustible gas in the intake pipe will burn violently and cause The pressure rises sharply, resulting in damage to the intake pipe, even the air filter and intercooler, or even more serious accidents. [0003] In the prior art, some technical solutions of explosion-proof valves for engines have also appeared. For example, a Chinese patent with application number 201310019357.X discloses a kind of explosion-proof valve for engines, which includes a base. The end far away from the base is provided with an exhaust hole, the housing is provided with a main shaft, the end of the main shaft close to the base is provided with a valve core, and th...

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Problems solved by technology

[0004] This technical solution can realize the discharge of combustible gas in the intake pipe from the exhaust hole provided on the casing when the flashback phenomenon occurs, effectively protecting the intake pipe, air filter and intercooler of the engine; but In this scheme, when the explosion-proof valve is exhausted, the valve core is subjected to bending moment, which leads to serious wear of the valve core; the gas in the intake pipe is not exhausted enough

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