Adjustable check valve

Abstract

In order to realize functions of flow regulation, check and leakage resistance, and reduce cost expenditure and maintenance cost of user equipment and mounting space required by a valve as much as possible, the invention provides an adjustable check valve. The adjustable check valve comprises a valve seat, a valve body, valve clacks, a rocker and a valve rod, wherein one end of the rocker is hinged to the valve rod. The improvement of the adjustable check valve is characterized by also comprising a worm wheel head and a guide rail; the worm wheel head is connected with one end of the valve rod; the surfaces opposite to the sealing surfaces of the valve clacks are defined as the back surfaces of the valve clacks; the guide rail is fixedly connected to the back surfaces of the valve clacks;an arc-shaped long hole is formed in the guide rail; the radian of the arc-shaped long hole uses an axis of the valve rod as the center; the other end of the rocker is connected with the guide rail; and the rocker can move along the arc-shaped long hole. According to the adjustable check valve disclosed by the invention, based on a conventional check valve structure, the guide rail is additionallyarranged on the backs of the valve clacks, so that the guide rail is movably connected with the rocker; besides, the worm wheel head is also additionally arranged at the end of the valve rod, and thevalve rod and the rocker can also be driven by the rotating worm wheel head to move, so that the opening degree of the valve can be flexibly adjusted, and control of the flow of the pipeline is realized.

Description

technical field [0001] The invention belongs to the technical field of valves, and in particular relates to an adjustable check valve. Background technique [0002] The check valve is a valve that relies on the kinetic energy of the pipeline fluid to open, and then relies on the gravity or spring force of the opening and closing part (disc) inside the valve or the spring force and the pressure of the return water to realize the closing function. Therefore, under the condition of no back pressure, the existing check valve can fully open the valve with a very small pressure. But in many pipeline applications, sometimes it is necessary to adjust the opening of the valve to control its flow, and the valve also needs to have a check function, and it is also necessary to be able to force the valve to be closed to prevent it from leaking. [0003] In the traditional solution, the regulating valve and the check valve are used in series to achieve the regulating and non-return funct...

AI Technical Summary

Problems solved by technology

[0003] In the traditional scheme, the regulating valve and the check valve are used in series to achieve the adjustment and check functions, which not only increases the user's equipment expenses and maintenance costs, but also requires a larger installation space

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