Overflow buffering silent check valve

Abstract

The invention provides an overflow buffering silent check valve comprising a valve body, a valve seat, a valve flap, a valve rod and a flow guide body; the valve seat, the valve flap, the valve rod and the flow guide body are arranged inside the valve body; the flow guide body is integrated with the valve body; the valve seat is arranged at the front end inside the valve body; a bushing is arranged between the valve rod and the flow guide body; one end of the valve rod is inserted to the bushing, and the other end of the valve rod is connected with the valve flap; a spring is arranged between the valve flap and the bushing; the front end of the valve flap is fixedly provided with a pressing plate through a bolt; and a sealing ring is arranged between each of two ends of the front end of the valve flap and the pressing plate. The overflow buffering silent check valve is small in size and light in weight; the sealing rings are pressed by the pressing plate, so that the sealing rings are convenient to replace, and time and labor are saved; and meanwhile, the pressing plate is a buffering pressing plate, therefore, when the valve is in normal overflow working, a water hammer generated by an overlarge pressure difference of fluids can be reduced, damage caused by an overhigh impact force of the valve is avoided, and the double effects of silent checking and a buffer plug are achieved.

Description

technical field [0001] The invention relates to the field of check valve manufacture, in particular to an overcurrent buffer type silent check valve. Background technique [0002] Check valves are the basic components of fluid control engineering and are widely used. It plays a role in protecting the safety of other fluid machinery and pipelines by preventing fluid backflow. At present, the commonly used check valves mainly include silent check valves, silencer check valves, and wafer check valves. They all have unsmooth flow channels, large resistance, and large head loss. Or rust, the friction between the valve stem and the valve sleeve will increase, the reset of the valve disc will be blocked, and the sealing performance will decrease. Contents of the invention [0003] The present invention aims at the above technical problems and provides an overcurrent buffer type silent check valve. [0004] In order to achieve the above object, the present invention adopts the ...

AI Technical Summary

Problems solved by technology

At present, the commonly used check valves mainly include silent check valves, silencer check valves, and wafer check valves. They all have unsmooth flow channels, large resistance, and large head loss. Or rust, the friction between the valve stem and the valve sleeve increases, the reset of the valve clack is blocked, and the sealing performance will decrease

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