Leakage sensor automatic shut-off valve

Abstract

An automatic stop valve with a water leakage induction function can prevent water devices from continuously leaking water. A valve body is provided with a valve seat between a water supply chamber and a water outflow chamber, a back pressure cavity is formed between the valve body and a bonnet, a diaphragm for opening and closing the valve seat is arranged on the valve body, a diaphragm plate is embedded in the diaphragm, a by-pass port communicated with the water supply chamber is formed in the diaphragm and the diaphragm plate, a piston hole and a flow guide passage are formed in the bonnet, an inner opening of the piston hole is communicated with the back pressure cavity, one end of the flow guide passage is communicated with the back pressure cavity while the other end is communicated with the piston hole, a piston rod is arranged on the position hole, the upper end portion of the piston rod is located in the back pressure cavity and circularly embedded with a sealing element A, a sealing element B is circularly embedded on the piston rod and located below the sealing element A, a communication opening of the flow guide passage and the piston hole is located between the sealing element A and the sealing element B, a flow passage is formed between the sealing element B and the edge of the inner opening of the piston hole, and a meshed container containing soluble solids is sleeved on the lower end portion of the piston rod. The automatic stop valve with the water leakage induction function is used as a normally open valve for the water devices.

Description

technical field [0001] The invention belongs to a device for preventing leakage of water appliances such as water purifiers and small kitchen treasures. The device can detect the leakage of input tap water from the water appliance and automatically cut off the input water path. Background technique [0002] With the continuous improvement of people's living standards, water or water treatment appliances in offices or business places and households are becoming more and more popular, such as water purifiers, storage water heaters, dishwashers, some washing machines and other appliances connected by hoses. Some water equipment and appliances use normally open valves to connect to the water source. Due to the quality, service life or improper operation of these equipment and appliances, water leakage often occurs. When the user goes out for a long time, this leakage will last for a long time. Existence often causes a large amount of accumulated water and dripping water in the u...

AI Technical Summary

Problems solved by technology

However, there are several problems with this device. First, the compressed pulp is easy to absorb water, and it is easy to deliquescence and absorb water in a humid environment, resulting in volume expansion even in the case of no water leakage, and the malfunction of the leakage prevention device occurs, which affects the normal operation of the water heater.

Moreover, compressed pulp is not a common item, and it is inconvenient for users to replace it after a malfunction occurs.

Second, when the device is under high water pressure, the plunger of the check valve is subjected to high water pressure. Even if the volume of the compressed pulp expands, the spring cannot recover due to water compression, so that the water source cannot be cut off to protect against water leakage.

[0005] The device provided by the Chinese utility model patent ZL200620057712.8 adopts water leakage detection and cooperates with electromagnetic valves to solve the problem of continuous water leakage, but requires an external power supply, including the configuration of the power interface, and the detection and control part requires special detection components and a container. It is used to place water appliances, which requires a considerable increase in cost, and increases the occupied space during installation and use, and is also inconvenient to use

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