Axial-flow type non-return valve

Abstract

The invention discloses an axial-flow type non-return valve. The axial-flow type non-return valve comprises a valve body, a base, a rear lining, a valve shaft, a valve clack and a valve seat, whereinthe rear end part of the valve shaft is at least partially arranged in the rear lining in a penetrating mode and can slide relative to the rear lining; the valve clack is fixedly connected with the front end part of the valve shaft; the valve seat is fixedly arranged in the valve body and can be matched with the valve clack for dividing the valve body into two parts in a sealed mode; a pressure spring for returning the valve clack and achieving the buffer effect is arranged between the valve clack and the rear lining; the pressure spring sleeves the valve rod; a ring-shaped mounting slot is formed among the valve clack, the valve seat and the valve body; and a supporting ring, sealing rings, a pressure ring and an O-shaped sealing ring are arranged in the ring-shaped mounting slot. The supporting ring, the sealing rings, the pressure ring, the O-shaped sealing ring and the pressure ring are matched to effectively prevent the valve seat and the valve clack from being damaged as a resultof collision, so that working noises are reduced, the service life of the valve is prolonged, and the sealing property of the valve is improved; and a guide body of the valve body is integrally cast,so that the structure is more stable, is firm and durable, and is stable in work.

Description

technical field [0001] The invention belongs to the field of valves, in particular to an axial flow check valve. Background technique [0002] Long-distance pipeline check valves are mostly installed in remote areas, with poor social support conditions, high equipment requirements, high reliability, long continuous operation cycle, light weight, and easy transportation, installation, maintenance and repair. The conventional axial-flow check valve adopts the disc shaft single-guide structure. The larger the pipeline pressure and the diameter, the more unstable the valve seat. At the same time, the conventional axial-flow check valve seat usually has no buffer structure, and the valve disc hits the valve seat to seal the valve. Impaired performance and short valve life. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide an axial flow check valve with reasonable structure, convenient use, stable operation and high performance in order to ove...

AI Technical Summary

Problems solved by technology

The conventional axial flow check valve adopts a disc shaft single-guiding structure, and the greater the pipeline pressure and caliber, the more unstable it is. At the same time, the seat of the conventional axial flow check valve usually has no buffer structure, and the valve disc knocks on the seat to make the valve seal Compromised performance, short valve life

Images