Water-hammer arrestor

Abstract

The invention relates to the field of pipe fitting manufacturing, in particular to a water-hammer arrestor. The water-hammer arrestor comprises a buffer tube body (1), a compressed air line (2), a pressure sensor (4), a high liquid-level sensor (5), a low liquid-level sensor (6), a drainage pipeline (7), and a buffer tube opening (9); one end of the buffer tube body (1) is provided with a blind tube of the buffer tube opening (9), and the closed end of the buffer tube body (1) is provided with the compressed air line (2) and the pressure sensor (4); and one position, close to the closed end, of the buffer tube body (1) is provided with the high liquid-level sensor (5), and one end, close to the buffer tube opening (9), of the buffer tube body (1) is provided with the low liquid-level sensor (6) and the drainage pipeline (7). Compared with the prior art, the water-hammer arrestor is simple in structure, low in cost, and convenient to use; and the water-hammer arrestor has good removingeffect, no maintenance is required, and the practicability is wide.

Description

technical field [0001] The invention relates to the field of pipe fitting manufacturing, in particular to a water hammer eliminator. Background technique [0002] In water supply systems and liquid flow test devices, it is very frequent to change the fluid path, fluid pressure and fluid flow in the pipeline. Due to the incompressibility of the liquid, the liquid in the pipeline will expand like a solid fixed cylinder, causing water hammer or water hammer. Due to the sudden opening or closing of the valve, the sudden stop of the water pump, the sudden opening and closing of the guide vane, etc., the flow rate changes suddenly, and the pressure fluctuates greatly at the same time, especially when the water flow is cut off or adjusted quickly. In addition, the closed Water hammer can also occur after a valve is suddenly opened or the feedwater pump is started. [0003] Water hammer will cause valve parts to be strained, pipes to be deformed, instruments to be damaged, and cau...

AI Technical Summary

Problems solved by technology

Due to the sudden opening or closing of the valve, the sudden stop of the water pump, the sudden opening and closing of the guide vane, etc., the flow rate changes suddenly, and the pressure fluctuates greatly at the same time, especially when the water flow is cut off or adjusted quickly. In addition, the closed Water hammer can also occur after the valve is suddenly opened or the feedwater pump is started

[0003] Water hammer will cause valve parts to be strained, pipes to be deformed, instruments to be damaged, and cause water pumps to reverse, pipe network pressure to drop, etc. In severe cases, the pipes will rupture and the entire drainage and water supply system will be paralyzed

[0004] Currently commonly used water hammer eliminators include a cylinder and a piston inside the cylinder. This type of water hammer eliminator can eliminate the water hammer effect to a certain extent, but after long-term operation, the gap between the piston and the inner wall of the cylinder The friction force gradually increases due to the influence of scale or other impurities, which affects the normal work of the water hammer

Maintenance is cumbersome and work efficiency is low

There are also water hammer eliminators that use airbags or elastic hose structures. This type of eliminator simply eliminates the impact of water flow through the contraction or expansion of airbags and elastic hoses. Under the impact of water flow, the airbag and elastic hose are easily broken and thus fail, and the service life is short

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