Water-saving non-return valve

Abstract

The invention discloses a water-saving non-return valve, which comprises a valve body, a valve core and a spring. A waterway (110) is formed inside the valve body (100); an inner hole face of the waterway (110) comprises a sealing section (111) and a water-saving section (112); a sealing ring (210) is sleeved outside the valve core (200); the spring (300) is pressed against the valve core (200), so that the valve core (200) is subjected to elastic force; if water in the waterway (110) positively flows and water pressure is higher than the elastic force, the valve core (200) moves to make the sealing ring (210) positioned on the water-saving section (112), and the sealing ring (210) radially deforms outwards due to the water pressure so as to reduce the sectional area at the periphery of the sealing ring (210) and between inner hole faces of the water-saving section (112); and if the water in the waterway (110) reversely flows and the water pressure is lower than the elastic force, thesealing ring (210) is positioned on the sealing section (111), and the sealing ring (210) seals an inner hole face of the sealing section (111). The invention has the advantages that: a non-return function and a water-saving function can be realized by a bracket and the sealing ring, the materials can be reduced, the manufacturing cost is reduced, the axial length of the valve core can be shortened, the occupied space is reduced, and the structure of the valve core can be simplified.

Description

Technical field [0001] The invention relates to a water-saving check valve. Background technique [0002] Existing water-saving check valves, such as: [0003] The utility model "Flow Regulating Check Valve" announced by the Chinese Patent Database on March 10, 2010, its patent number is CN200920137849.8. It includes a sleeve, a flow limiting device and a one-way valve. The one-way valve is sealed at the water outlet end of the sleeve, and the flow limiting device is arranged at the water inlet end of the sleeve; the flow limiting device includes a The water-saving sheet holder and the water-saving sheet sleeved in the water-saving sheet support are made of flexible material, which deforms with the water pressure to block the water passage holes of the water-saving sheet support. It has the following shortcomings: Because the one-way valve and the flow limiting device are separated independently, two brackets and two sealing rings are required, which not only wastes materials, bu...

AI Technical Summary

Problems solved by technology

It has the following disadvantages: because the one-way valve and the flow limiting device are separated independently, two brackets and two sealing rings are required, which not only wastes materials, but also increases the space occupied by the check valve.

Because the valve core needs to be sleeved with two sealing rings, one of which is used as a check valve for sealing, and the other sealing ring is used as a flow limiting device for adjustment, so there are the following deficiencies: 1. The axial length of the valve core Long, increase materials, increase manufacturing costs, and increase space occupation; 2. Set two sealing rings, increase materials, increase manufacturing costs; 3. Set two assembly grooves for sealing rings at the valve core to reduce the valve core. Strength, increase the complexity of the spool structure, and increase manufacturing costs

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