A check valve (100) has a valve seat (20), and a valve disc (30) which closes the valve seat (20) in an openable/closable manner by linear reciprocating oscillation in the direction approaching or departing away from the valve seat (20), the check valve (100) being configured, as a lift-type check v
A check valve (100) has a valve seat (20), and a valve disc (30) which closes the valve seat (20) in an openable/closable manner by linear reciprocating oscillation in the direction approaching or departing away from the valve seat (20), the check valve (100) being configured, as a lift-type check valve, to allow therein the inflow direction (D1) of a fluid (F) flowing into the valve seat (20) and the passing direction (D2) of the fluid (F) passing through the valve disc (30) to cross each other, the valve disc (30) being provided with, on the inflow side (primary side) thereof, a deflection surface (40) on which the fluid (F) is deflected from the inflow direction (D1) to the passing direction (D2).
대표청구항▼
1. A lift-type check valve having a first opening and a second opening, a fluid passing throughout the lift-type check valve from the first opening to the second opening, the lift-type check valve comprising: an inflow cylinder having the first opening at a first end surface thereof and a second end
1. A lift-type check valve having a first opening and a second opening, a fluid passing throughout the lift-type check valve from the first opening to the second opening, the lift-type check valve comprising: an inflow cylinder having the first opening at a first end surface thereof and a second end surface opposite to the first end surface, the first end surface attached directly to a flange part, the second end surface being a single plane serving as a valve seat, wherein the inflow cylinder has an inflow direction;a valve cylinder provided at a downstream side of the inflow cylinder along the inflow direction;an outflow cylinder connected to the valve cylinder, the outflow cylinder having the second opening and a passing direction, wherein the inflow direction intersects with the passing direction;a valve disc provided in the valve cylinder to operate in an openable manner and a closable manner by linear reciprocating oscillation in the inflow direction by approaching to or departing away from the valve seat; and a deflection surface provided on the valve disc on which the fluid is deflected from the inflow direction to the passing direction when the valve disc is opened, wherein the deflection surface is a flat inclined surface in which a normal line extended from the flat deflection surface toward an upstream side intersects with the inflow direction at an angle smaller than 45. 2. The check valve of claim 1, wherein the normal line intersects with the inflow direction at an angle between 15° and 22.5°. 3. The check valve of claim 1, further comprising a water-tight, sheet-form sealing component which is held between the valve seat and the valve disc. 4. The check valve of claim 3, wherein the sealing component has a circumferential part which is held between the valve seat and the valve disc, and a stopper part which is provided inside the circumferential part so as to be contiguous therewith and increased in the thickness, to thereby configure the deflection surface, and the circumferential part and the stopper part are molded from a single material in an integrated manner. 5. The check valve of claim 4, wherein the stopper part has a form of oblique cylinder which rises up from the circumferential part towards an oscillating direction of the valve disc, so as to allow, when the valve disc is closed, the sealing component to come into contact with the valve seat in a three-dimensional manner. 6. The check valve of claim 3, wherein the sealing component configures the deflection surface, and is formed using a closed-cell foam resin material. 7. The check valve of claim 1, wherein the deflection surface and the valve disc are molded from a single material in an integrated manner. 8. The check valve of claim 1, wherein the second end surface of the inflow cylinder inclines corresponding to the deflection surface, to configure the valve seat. 9. The check valve of claim 8, wherein the inflow direction intersects with the passing direction at a right angle. 10. The check valve of claim 8, further comprising an elastic component which energizes the valve disc towards the valve seat, and a cap part which is detachable from the valve cylinder, and supports the valve disc and the elastic component, configured so that the valve disc and the elastic component are detachable from the valve cylinder, by removing the cap part from the valve cylinder. 11. The check valve of claim 10, wherein the valve disc and the cap part are rotatable to each other, and the elastic component is pressurized against at least one of the valve disc and the cap part in a non-fixed manner. 12. The check valve of claim 11, wherein at least one of the valve disc and the cap part is provided with a resin material which frictionally holds an end of the elastic component. 13. The check valve of claim 10, further comprising a guiding part which guides the valve disc to slide over the cap part in an unrotatable manner. 14. A pumping system having the check valve described in claim 1, the pumping system comprising: a liquid reservoir which reserves a liquid;a pump which is installed overground and pumps up the liquid;a suction pipe which connects the liquid reservoir and the pump; anda discharge pipe which allows the liquid discharged from the pump to flow therethrough, the check valve being provided to the overground part of the suction pipe. 15. The pumping system of claim 14, wherein the suction pipe comprises a suction part which is installed upright with the bottom end immersed in the liquid reservoir, and a transfer part which is laid on its side overground and is connected to the pump,the check valve being provided between the suction part and the transfer part. 16. The pumping system of claim 14, wherein the check valve comprises a pressure reducing port which is formed to be opened in the inflow cylinder,the pumping system further comprising a vacuum pump connected to the pressure reducing port, and the pump being an inverter pump.
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이 특허에 인용된 특허 (12)
Lejnar Emil A. (201 S. Lake Dr. Lehigh Acres FL 33936), Aspiration chemical supply apparatus and method.
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