Axial-flow type check valve

Abstract

The invention discloses a valve structure, and particularly relates to an axial-flow type check valve. The axial-flow type check valve comprises a valve body, a valve rod, a valve seat, a valve clack, a valve sleeve, a bush, anti-falling locking nuts, thrust washers, closed locking nuts and a spring device. The anti-falling locking nuts comprise the first anti-falling locking nut and the second anti-falling locking nut. The thrust washers comprise the first thrust washer and the second thrust washer. The closed locking nuts comprise the first closed locking nut and the second closed locking nut. The axial-flow type check valve can achieve the effects that all the components of a valve element are prevented from falling and rotating and are resistant to vibrating and detachable, and the problems that the valve element of the axial-flow type check valve is prone to falling off and rotating, hard to maintain and the like are solved. Meanwhile, the use performance of valves of this kind is improved, and the service life of the valve is prolonged.

Description

technical field [0001] The invention relates to a valve structure, in particular to an axial flow check valve. Background technique [0002] The axial flow check valve is favored by engineering design because of its strong flow capacity, small flow resistance, no jamming in opening and closing, and reliable sealing. According to the classification of the valve core structure, the axial flow check valve can be divided into ring type and disc type. [0003] Working principle of axial flow check valve: The opening and closing of the disc is determined by the pressure difference between the inlet and outlet of the valve. When the pressure at the inlet port is greater than the sum of the pressure at the outlet port and the spring force, the disc opens. As long as there is a pressure difference, the disc will always be in the open state, and the opening degree is determined by the size of the pressure difference. When the sum of the outlet pressure and the spring force is great...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides an axial flow check valve, which realizes the effects of anti-falling, anti-rotation, anti-vibration, and detachable effects of each part of the axial flow check valve core, and solves the problem of the axial flow check valve. The spool is easy to fall off, easy to rotate, difficult to maintain, etc.

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