Water-hammer-preventing ultrasonic water level detection method

A water level detection, ultrasonic technology, applied in the direction of measuring devices, engine lubrication, liquid/fluid solid measurement, etc., can solve the problems of ineffective prevention of water hammer, inability to measure pipeline water level, etc., to achieve the benefit of safe production and operation, The effect of reducing personal injury and economic loss and avoiding personal injury and economic loss

Active Publication Date: 2012-09-19
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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  • Application Information

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Problems solved by technology

However, this patent application cannot measure the water level in the pipeline and cannot effectively prevent water hammer

Method used

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  • Water-hammer-preventing ultrasonic water level detection method
  • Water-hammer-preventing ultrasonic water level detection method
  • Water-hammer-preventing ultrasonic water level detection method

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] The process of the ultrasonic water level detection method of the waterproof hammer of the present invention is as follows figure 1 shown, including the following steps:

[0031] ⑴ Choose A-type pulse reflection ultrasonic flaw detector, the instrument model is CTS-9002Plus, and the working frequency range is 0.5MHz~10MHz. The instrument is linearly displayed at least 80% of the full scale on the fluorescent screen, and has a continuously adjustable attenuator above 80dB, and the step level is not greater than 2dB per step.

[0032] ⑵The specification of the pipeline to be tested is Φ51×5mm, the material is 12Cr1MoV, and the pipe diameter is small, so the 5P10mm probe is selected.

[0033] (3) Select a straight tube with the same specification and material as the tested tube as a comparison test block. Such as figure 2 , image 3 As shown, the comparison t...

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Abstract

The invention relates to a water-hammer-preventing ultrasonic water level detection method, comprising the following steps of: (1) selecting an A type pulse reflection type ultrasonic flaw detector with a work frequency range of 0.5 MHz-10 MHz; (2) selecting a probe; (3) selecting a straight pipe which is the same as a detected pipe in specification and material as a comparing test block; (4) adjusting the detection sensitivity of the ultrasonic flaw detector; (5) determining a part to be detected of a pipeline; polishing until a metal luster can be observed and coating a coupling agent; (6) placing the probe on the part to be detected of the pipeline and starting an instrument to detect; (7) comparing a wave outputting position with a detection reference reflecting wave position; and (8) if the wave outputting position is in front of a reference reflecting wave, determining that a water level is lower than a threshold value; and after the wave outputting position is behind the reference reflecting wave, determining that the water level exceeds the threshold value. The water-hammer-preventing ultrasonic water level detection method accurately judges whether the water level of the pipeline exceeds the highest allowable water level value or not so as to provide technology supports to the operation and manipulation in time and avoid a water hammer phenomenon; and the water-hammer-preventing ultrasonic water level detection method is good for safe production and operation, and reducing and avoiding personnel damages and economical losses, which are caused by the water hammer.

Description

technical field [0001] The invention belongs to the technical field of engineering physical and chemical detection, and relates to an ultrasonic detection method, in particular to an ultrasonic water level detection method for a waterproof hammer. Background technique [0002] Water hammer is also called water hammer. In the process of water (or other liquid) transportation, due to sudden opening or closing of valves, sudden stop of water pumps, sudden opening and closing of guide vanes, etc., the flow velocity changes suddenly and the pressure fluctuates greatly at the same time. The instantaneous pressure generated by water hammer can reach dozens or even hundreds of times of the normal working pressure in the pipeline, which can cause strong vibration and noise in the pipeline system, have a great destructive effect on the pipeline system, and damage valves and joints. The water hammer effect will cause damage to the entire pipeline system and its hanging and fixing devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/296
Inventor 王志永牛晓光王庆郝晓军李树军李中伟
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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