Check valve

Abstract

The invention provides a check valve, and relates to the technical field of valves. The check valve comprises a valve body and a valve element mechanism, wherein the valve body is provided with an inlet end, a connecting channel and an outlet end which are sequentially connected; the valve element mechanism comprises a flow limiting plate, a sealing assembly, a connecting sleeve, a movable rod, a supporting plate, rotating shafts and blades; the flow limiting plate is fixed in the connecting channel; a flow limiting hole is formed in the middle of the flow limiting plate; the sealing assembly is arranged on one side of the flow limiting plate; the connecting sleeve is installed on one side of the sealing assembly, and connected with the movable rod in an insertion mode; the supporting plate is fixed in the connecting channel; fluid can flow through the supporting plate; one end of the movable rod is connected with the supporting plate in an insertion mode; flow guide channels are formed in the side walls of the valve body; and the blades are installed in the flow guide channels through the rotating shafts, and are in transmission connection with the movable rod. When the fluid flows reversely, the situation that the fluid flows reversely can be better avoided through the sealing assembly; and when the fluid flows in the forward direction, the blades are prevented from rotating under the action of the fluid all the time, so that energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a check valve. Background technique [0002] Check valve, also known as one-way valve or check valve, its function is to prevent the medium in the pipeline from flowing backward, that is, when the fluid flows in the opposite direction, under the action of fluid pressure, the disc of the one-way valve is closed, so that the fluid Can not flow backwards. [0003] The current check valve generally has the following problems: in the pipeline with low fluid pressure, the valve disc cannot be completely closed due to the low fluid pressure, so that the fluid can still flow backwards, thereby affecting the working process. [0004] The Chinese invention patent with the publication number CN112361040A discloses a check valve. Although it can solve the above problems to a certain extent, there are still the following problems to be solved urgently: [0005] 1. Since the drive shaft of th...

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Problems solved by technology

[0003] The current check valve generally has the following problems: in the pipeline with low fluid pressure, the valve flap cannot be completely closed due to the low fluid pressure, so the fluid can still flow backwards, thus affecting the working process

[0005] 1. Since the drive shaft of the driving vane is installed along the axial direction of the valve body, when the liquid level in the pipeline is low and the fluid pressure is low, the rotation of the vane is not sensitive enough, so that the force of the vane on the sealing film is small or Virtually no force, fluid backflow is still possible

[0006] 2. When the fluid is flowing forward, the blades will continue to rotate under the action of the fluid, which will consume the energy of the fluid flow and cause a waste of energy

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