High-temperature one-way valve

Abstract

The invention discloses a high-temperature one-way valve which comprises a valve body (1), a sealing ceramic ball (2), a piston (3), a sealing gasket I (4), a sealing gasket II (7) and a valve deck (8), wherein an external thread is formed in the outer side of the lower end of the valve body (1); a taper hole is formed in the inner side of the lower end of the valve body (1); a taper sealing valve seat and a cylindrical cavity are sequentially arranged upwards along an air inlet; the piston (3) takes the shape of a step shaft; two annular grooves (301) are formed in the excircle of the large end; a deeper inner hole is formed in the small end; and two annular grooves (301) are formed in a cylinder at one end of the valve deck (8). The high-temperature one-way valve has the characteristics of being compact in structure and small in flow resistance of a direct connection passageway; in addition, the heat insulation and heat dissipation design enables the high-temperature one-way valve to have higher high temperature reliability; and the high-temperature one-way valve has the advantage of practical engineering application, can be widely applied to industrial control and other industries and is suitable for fuel gas and other high-temperature media.

Description

technical field [0001] The present invention belongs to the technical field of one-way valves, and more particularly, relates to a high-temperature one-way valve. Background technique [0002] A one-way valve is a directional control valve in which the airflow can only flow in one direction and cannot flow in the opposite direction. Its working principle is the same as that of hydraulic check valve. The check valve is divided into self-operated and elastic element reset type. The self-operated type has low reliability and relatively few applications, and the spring type is more widely used. Compressed air enters from the inlet, overcomes the spring force and frictional force to open the valve port of the one-way valve, and the compressed air flows from the inlet to the valve body. The port is closed, so that the airflow from the valve body cavity inlet is blocked. However, due to the frequent work and closed and open state of the one-way valve, the valve core of the valve...

AI Technical Summary

Problems solved by technology

However, due to the frequent work and closing and opening of the one-way valve, the spool of the valve port will be stuck after a period of use, resulting in backflow of the medium or failure to achieve a good sealing effect.

At this time, the one-way valve needs to be replaced, which increases the cost

[0003] In addition, the spring is assembled in the flow channel of the valve, and its working environment is the medium. This simple and compact structure is very suitable for conventional industrial control systems, and is not suitable for high-temperature media.

The high-temperature medium has a great influence on the spring, so an angle-type high-temperature check valve appears as the need arises. The flow path is angle-shaped, and the spring and the valve core are coaxially assembled outside the flow path to avoid contact with high-temperature medium. Complex structure and large flow resistance

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