Pressure protection valve and gas water heater

Abstract

The invention relates to a pressure protection valve and a gas water heater. The pressure protection valve comprises a valve body. Valve element assemblies arranged in a valve cavity of the valve body, and the valve body is provided with a water inlet and a water outlet which communicate with the valve cavity. The pressure protection valve is characterized in that the two opposite side walls of the valve body are provided with a groove and a guide groove respectively. A valve element comprises the second valve element assembly and the first valve element assembly. The second valve element assembly is arranged in the valve cavity and used for controlling opening and closing of the water inlet and is in a normally-open state. The first valve element assembly is used for controlling the second valve element assembly to move and comprises a first valve rod, a first valve plug and a first elastic part. The first valve plug is slidingly and sealingly connected to the circumference wall of the groove, and the first elastic part abuts against the bottom face of the groove and the first valve plug. One end of the first valve rod is in driving connection with the first valve plug, and the other end of the first valve rod is slidingly contained in the guide groove. The first valve rod drives the second valve element assembly to move.

Description

technical field [0001] The invention relates to the field of valves, in particular to a pressure protection valve and a gas water heater using the pressure protection valve. Background technique [0002] Due to water supply and terminal use, the existing domestic water usually has pressure fluctuation problems. For some normally open connecting water pipes, such as water heater inlet pipes, the water inlet end is a normally open valve, and the water outlet end is a normally closed valve. Under working conditions, if the pressure in the water pipe suddenly rises, for example, when it freezes and expands, it is easy to cause the pipe to swell and crack, and it will crack from the weak point of the pipe's pressure bearing capacity, resulting in water leakage. If the user fails to find out and close the water inlet pipeline in time, the water in the water source pipeline will continuously enter the connecting water pipe and run out from the crack, resulting in serious water leak...

AI Technical Summary

Problems solved by technology

[0002] The existing domestic water usually has the problem of pressure fluctuation due to water supply and terminal use. For some normally open connecting water pipes, such as water heater inlet pipes, the water inlet end is a normally open valve, and the water outlet end is a normally closed valve. Under working conditions, if the pressure in the water pipe suddenly rises, for example, when it freezes and expands, it is easy to cause the pipe to swell and crack, and it will crack from the weak pressure-bearing capacity of the pipe, resulting in water leakage

If the user does not find out and close the water inlet pipeline in time, the water in the water source pipeline will continuously enter the connecting water pipe, and run out from the crack, resulting in serious water leakage, causing property damage and safety problems such as floor soaking, electrical leakage, etc.

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