A lift check valve for easy spring replacement

Abstract

The invention discloses a lifting check valve which is easy to replace the spring. Mechanism, the outside of the spring replacement mechanism is provided with two left and right symmetrical disc limit mechanisms; when the elastic force of the check valve spring decreases, turn the elastic force adjustment lever to restore the elastic force of the check valve spring to the original state, thereby reducing the force of the check valve spring. The frequency of spring replacement prolongs the single use time of the check valve spring. At the same time, through the valve disc limit mechanism, when the spring is replaced, the limit block is in contact with the upper end surface of the spring sleeve, so that the valve disc cannot move upward under the action of water flow. Movement, so that the water flow cannot enter the drain through the disc movable chamber, so that the check valve spring can be replaced without turning off the water source, and the maintenance efficiency of the check valve spring is improved.

Description

technical field [0001] The invention relates to the related technical field of check valves, in particular to a lifting check valve which is easy to replace springs. Background technique [0002] Check valve refers to a kind of valve whose opening and closing parts are circular discs, which can block the reverse flow of medium by acting on its own weight and medium pressure. [0003] At present, the bonnet and valve body of the lifting check valve are fixed together by bolts. The spring of the check valve is located in the valve body. Because the spring is in contact with water for a long time, the spring is easily damaged under the corrosion of water flow, and the spring is damaged. , if you want to replace the spring, you need to close the water inlet first, and then remove the valve cover to replace it, which makes the whole process very cumbersome, and the service life of the spring is affected by the water quality. If the water quality is acidic, the service life of the...

AI Technical Summary

Problems solved by technology

[0003] At present, the bonnet and valve body of the lifting check valve are fixed together by bolts. The spring of the check valve is located in the valve body. Because the spring is in contact with water for a long time, the spring is easily damaged under the corrosion of water flow, and the spring is damaged. , if you want to replace the spring, you need to close the water inlet first, and then remove the valve cover to replace it, which makes the whole process very cumbersome, and the service life of the spring is affected by the water quality. If the water quality is acidic, the service life of the spring will also be affected. Corresponding reduction, thereby increasing the frequency of maintenance and replacement

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