Multifunctional damping check valve

Abstract

The invention discloses a multifunctional damping check valve. The valve comprises a valve body, a top cover, a valve port and a valve body inner cavity, the top cover is arranged above the valve portand connected with the valve body, a valve element body is arranged in the valve body inner cavity, the valve element body is provided with a piston, a linear bearing and a spring A from top to bottom, and the inner wall of the piston is connected with the outer wall of the valve element body; the outer wall of the piston is tightly attached to the inner wall of the valve port, the inner wall ofthe linear bearing is connected with the outer wall of the valve element body, the outer wall of the linear bearing is connected with the inner wall of the valve port, the outer surface of the valve element body is sleeved with the spring A, one end of the spring A is connected with the bottom of the linear bearing, and a water flow bidirectional control mechanism is arranged at the bottom of thevalve element body; and the water flow bidirectional control mechanism is connected with the bottom of the valve element body and is also connected with the other end of the spring A. According to thecheck valve, the movement of the valve element body is controlled, the abrasion of the valve element body is reduced, the pipe network pressure oscillation caused when the check valve is closed is reduced, the safety of a pipe network is guaranteed, and meanwhile, the service life of the check valve is prolonged.

Description

technical field [0001] The invention relates to a multifunctional damping check valve, which belongs to the technical field of valves. Background technique [0002] In the industrial pipeline network, in order to prevent the damage of the power pump caused by the reverse flow of the pipeline medium, a check valve is often designed and installed at the outlet of the pump so that the medium can only flow in one direction. The existing general check valve is installed in the valve body There is a disc-shaped control mechanism, which can rotate around the shaft set in the valve body. When the fluid medium in the pipeline flows backwards, the sealing surface of the control mechanism is closely matched with the sealing surface of the valve body under the action of the reverse flow medium. Therefore, the valve is quickly closed to prevent the backflow of the medium. However, when the valve is closed, the sealing surface of the control mechanism hits the sealing surface of the valv...

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Problems solved by technology

However, when the valve is closed, the sealing surface of the control mechanism hits the sealing surface of the valve body at a high speed due to the fast flow of the medium back and the high instantaneous pressure, causing damage to the sealing surface and causing internal leakage, reducing the service life of the valve, and accompanied by loud noises. The phenomenon of water hammer can cause pipeline rupture in severe cases, and when the ordinary check valve is used in the pipeline network, the pressure fluctuation of the pipeline network will cause the movement of the valve core body, and the movement will interact with the pressure wave of the pipeline network to generate new pressure fluctuations. Ordinary check valves will cause pressure oscillations in the pipe network when they are closed quickly, which is not conducive to the safety of the pipe network and energy saving, and shortens the service life of the check valve

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