check valve

Abstract

The invention provides a check valve and relates to the technical field of valves. The check valve includes a valve body and a valve core mechanism, and the valve body has an inlet port, a connecting channel and an outlet port connected in sequence. The valve core mechanism includes a restrictor plate, a sealing assembly, a connecting sleeve, a movable rod, a support plate, a rotating shaft and blades. The flow limiting plate is fixed in the connection channel, the middle part of the flow limiting plate is provided with a flow limiting hole, the sealing assembly is arranged on one side of the flow limiting plate, and a connecting sleeve is installed on one side of the sealing assembly, and the connecting sleeve is inserted into the movable rod to support The plate is fixed in the connecting channel, the fluid can pass through the support plate, and one end of the movable rod is inserted into the support plate. A diversion channel is opened on the side wall of the valve body, the vane is installed in the diversion channel through the rotating shaft, and the vane is connected with the movable rod through transmission. When the fluid flows in the reverse direction, the sealing assembly can better avoid the reverse flow of the fluid; when the fluid flows in the forward direction, the blades will not always rotate under the action of the fluid, so as to reduce energy consumption.

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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