Flap valve device

Abstract

The flap valve device comprises a flap valve seat capable of being connected with a water outlet of a water pump and a flap valve bin used for being connected with a water outlet pipeline, and a pump opening end flange and a flap valve plate cavity flange which are connected with the water outlet of the water pump are arranged on a port of the flap valve seat. A water outlet pipe end flange and a butt joint flange which are connected with a water outlet pipeline are arranged on an end opening of the flap valve bin, the flap valve seat and the flap valve bin are in a bent pipe shape, and the flap valve plate cavity flange is provided with a concave space capable of containing the flap valve plate and an annular flap valve sealing face protruding out of the concave space. The concave space is provided with a straight area corresponding to the opposite outer arc side of the flap valve seat, the straight area is provided with a groove-shaped space for containing the flap valve shaft and the flap valve neck, and the shape of the end of the butt flange corresponds to the shape of the end of the flap valve plate cavity flange. The opening angle of the flap valve is large, the water outlet flow of the device cannot be affected, the energy-saving effect is achieved, the flap valve can be opened by 90 degrees, water flow cannot be pressed, and the service life of the flap valve is long.

Description

technical field [0001] The invention relates to a flapper device matched with a water pump. Background technique [0002] At the water outlet of the water pump body (especially when the water outlet is upward), set up a flapper device, and then connect the water outlet pipe. Then artificially fill the water, because the resistance of the bottom valve seriously affects the water absorption capacity during the operation of the pump, and when the liquid level drops significantly, the water cannot be sucked up. When the valve is closed, it is impossible to manually pour water and divert water, only a vacuum pump can be used to divert water), then the valve will be automatically closed under the action of atmospheric pressure, blocking the air in the outlet pipe, so that the vacuum pump can pump the air in the inlet pipe as soon as possible Let the water pump casing be filled with water to meet the conditions for the pump to start. After the water pump is started, pressure is f...

AI Technical Summary

Problems solved by technology

At present, some designs seem to have paid attention to this problem, and deliberately increased the flow channel space of the flap door chamber during design (changed the shape of the elbow pipe of the flap door chamber, and increased the size and space), but unfortunately, it cannot be increased. The nozzle diameter of the valve chamber flange is large, because if the nozzle diameter of the valve chamber flange is increased, the nozzle cannot cover the groove of the valve shaft

Therefore, no matter how the shape and space of the elbow of the valve chamber are changed or enlarged, this problem cannot be solved fundamentally, because the nozzle part of the flange of the valve chamber restricts the valve to death, and no matter how large the space behind it is also useless

Disadvantages of not being able to open the flap valve at a large angle: First, it suppresses the water flow and increases the resistance of the water flow, which actually consumes energy, reduces the efficiency of the water pump, and seriously affects the water flow, which is not energy-saving; It will cause plastic deformation of the valve neck. After the water pump stops, the valve will not return well, and it will not be able to seal, lose the function of use, and seriously reduce the life of the valve.

Images