Axial-flow type check valve capable of replacing internal part on line

Abstract

The invention discloses an axial-flow type check valve capable of replacing an internal part on line. The check valve comprises a valve body, a valve cover, a valve clack component, wherein the valve cover is positioned at the upper part of the valve body; the valve clack component is arranged in a middle chamber of the valve body; the valve cover and the valve body are connected with each other by a sealing structure and a dismountable fastening structure; the check valve is characterized in that a valve clack positioning component for positioning the valve clack component is also arranged inside the middle chamber of the valve body; the valve clack positioning component is fixedly mounted at the wall of the middle chamber of the valve body so that the valve clack component in the middle chamber of the valve body is not fixed in a way that the valve cover is connected by screws, a sealing problem caused by a bolt hole formed in the valve cover can be prevented, so a mounting structure of the valve is simplified, the production cost of the valve is lowered and the on-line maintenance time is shortened.

Description

technical field [0001] The invention relates to a check valve, in particular to an axial-flow check valve whose internal parts can be replaced online. Background technique [0002] Check valve, also known as one-way valve or non-return valve, belongs to an automatic valve, its function is to make the fluid flow in only along the inlet end, but the outlet end fluid cannot flow back, so as to prevent the fluid from flowing in reverse. Check valves include lift check valves and swing check valves. The lift check valve has a large fluid resistance coefficient and is suitable for occasions with high flow rates. Although the flow resistance of the swing check valve is higher than that of the lift check valve The return valve is small and can be used in occasions with low flow velocity, but it still has a certain flow resistance, and cannot play a good role as a one-way valve in large-diameter occasions with low flow velocity and infrequent flow changes. The axial flow check valve...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the upper structure of the axial-flow check valve in the prior art is complicated, which leads to the problem that the on-line maintenance and disassembly takes a long time, so an axial-flow check valve that can efficiently realize on-line maintenance is proposed valve

Images