Safety valve for preventing backflow of water

Abstract

The invention relates to the technical field of safety valves, and discloses a safety valve for preventing backflow of water. The safety valve comprises a safety valve body; a check valve is fixedly mounted on the right side of the safety valve body; and a liquid inlet cavity is formed in the check valve. According to the safety valve for preventing backflow of water, the liquid inlet cavity in the check valve communicates with the safety valve body, during operation of the safety valve body, liquid flows into a liquid outlet cavity through the liquid inlet cavity, when the safety valve body stops operating, pressure is applied to a check plate through a check spring at the bottom of a pressing block, so that water flow cannot flow back to the safety valve body, by rotating a rotary handle, the position of the pressing block is adjusted through an adjusting screw, the compression state of the check spring is adjusted, thus, the pressure of the check spring against the check plate is adjusted, by arranging a buffer spring and a buffer block, the pressing block can be effectively protected and prevented from being stuck in the check valve, and the purposes of preventing backflow of water and improving the safety are achieved.

Description

technical field [0001] The invention relates to the technical field of safety valves, in particular to a safety valve for preventing backflow of water. Background technique [0002] The safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, it discharges the medium to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. , The safety valve belongs to the automatic valve category, mainly used in boilers, pressure vessels and pipelines, the control pressure does not exceed the specified value, and plays an important role in protecting personal safety and equipment operation. Note that the safety valve must pass a pressure test before it can be used. [0003] Since the safety valve is used as an important part of the equipment pipeline, it requires hi...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a safety valve for preventing backflow of water, which has the advantages of high safety, and solves the problem that the existing safety valve has a single structure and function, generally only has the function of opening and closing the pipeline, and usually cannot Prevent water from flowing backwards. When the safety valve controls the water in the pipeline, the water will flow backwards. For example, it is used as a safety valve on a water heater. Because the temperature in the water heater is high, when the water flows backwards, it will cause hot water to flow into the water pipe. , so that the cold water pipe will be scalded

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