Backflow non-air pressure emergency shut-off valve

Abstract

The invention discloses a backflow non-air pressure emergency shut-off valve device. The backflow non-air pressure emergency shut-off valve device comprises an upper shell, a lower shell and an automatic shut-off device, a valve water inlet and a valve water outlet which are arranged inside the shell, wherein the automatic shut-off device inside the shell comprises a handle, a push rod, a balancing weight, a leather gasket, a diaphragm and a gland; when the water supply is cut off, the pressure in a pipe is reduced, and the automatic shut-off device falls off automatically to block off a water outlet in a container, so that the container is in a sealing state, and sealing is formed in the container through the elasticity and the sealing property of the diaphragm; when the water supply is restored, the water pressure in the pipe is increased, and the position of the water pressure is controlled by the angle of a water platform, so that the automatic shut-off device presses more and more tightly, the sealing property is better, and water leakage is not liable to occur; and when in use, the automatic shut-off device moves upwards, water in the water pipe flows normally, the pressure in the pipe is larger than the weight of the balancing weight, and the water pipe floats above. According to the backflow non-air pressure emergency shut-off valve device disclosed by the invention, the upper shell and the lower shell are sealed, and the balancing weight moves relative to the handle, and does not generate abrasion with the inner wall of the upper shell, so that a jamming risk does not exist, the security is enhanced, and waste and a disaster caused by water are avoided.

Description

technical field [0001] The invention relates to a device for backflow non-air pressure emergency closing valve. Background technique [0002] At present, most of the water-saving faucets on the market are different faucets, which do not have the function of self-closing without water. The disadvantage of this faucet is: if there is a water outage and you forget to turn off the faucet, the faucet cannot be automatically closed when water comes in, resulting in a waste of water resources and, in serious cases, loss to the family. For this reason, people have carried out corresponding technical improvement to common water tap, as adding circuit control mechanism in the structure of water tap, to reach the purpose of shutting off water tap automatically when water stops. But the cost of this faucet is high, the volume is large, it is difficult to manufacture, and an external power supply is required during use, which is too inconvenient to use and cannot be well applied to ev...

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of faucet is: if there is a water outage and you forget to turn off the faucet, then when the water comes, the faucet cannot be closed automatically, resulting in a waste of water resources, and in serious cases, it will bring losses to the family.

But this faucet is expensive, bulky, difficult to manufacture, and needs an external power supply when using it, which is too inconvenient to use and cannot be well applied to every family.

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