A water hammer elimination decompression device for protecting valves

Abstract

The invention discloses a water hammer eliminating decompression device for protecting a valve, which comprises a first connecting pipe, a device body and a second connecting pipe arranged in sequence from left to right. The advantage is that in the present invention, on the one hand, under the first straight plane, the first inclined plane, the second straight plane, the second inclined plane, and the third straight plane whose width is continuously increasing, according to Bernoulli's principle, the width gradually increases, and the water On the other hand, the water flow continuously squeezes the multiple piston plates, and compresses the second spring, so that the air in the first compression chamber and the second compression chamber are respectively pressed in through the first communication pipe and the second communication pipe. In the first choke bag and the second choke bag, the first choke bag and the second choke bag among the multiple active parts will form a choke surface that is closed to the water outlet to avoid impact on the valve. The third compression chamber will further play the role of decompression, completely eliminate the water hammer, and the structure is simple and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a water hammer elimination and decompression device for protecting valves. Background technique [0002] Water hammer is when there is a sudden power failure or when the valve is closed too fast, due to the inertia of the pressure water flow, a water shock wave is generated, just like a hammer, so it is called water hammer. The force generated by the back and forth shock waves of the water flow, sometimes so great, can damage valves and pumps. [0003] When the electric water pump is started at full voltage, it can accelerate from a static state to a rated speed in less than 1 second, and the flow in the pipeline increases from zero to the rated flow. Since the fluid has momentum and a certain degree of compressibility, a sharp change in the flow rate will cause an impact of too high or too low pressure in the pipeline, as well as the phenomenon of "cavitation". The impact of pr...

AI Technical Summary

Problems solved by technology

[0004] The instantaneous pressure of water hammer greatly exceeds the normal pressure, and often produces destructive effects, causing strong vibration or noise in the piping system, and may damage the valve joints, which has a great destructive effect on the piping system

At present, most pipeline systems choose to install water hammer arresters to eliminate or reduce the water hammer effect, but most of the existing water hammer arresters have complex structures and high manufacturing costs

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