Ultrasonic coupling agent for flaw detection of railway steel rail joints and train hubs and preparation method of ultrasonic coupling agent

Abstract

The invention provides an ultrasonic coupling agent for flaw detection of railway steel rail joints and train hubs and a preparation method of the ultrasonic coupling agent. The ultrasonic coupling agent is prepared from the following raw materials in percentage by mass: 25-35% of ethanol, 3-10% of ethylene glycol, 60-70% of water and 0.8-1.2% of hydroxyethyl cellulose. The ultrasonic coupling agent disclosed by the invention is more stable and good in wave permeability, has flame retardance, super low temperature resistance and autonomous volatility within 25-35 minutes, does not cause harm to rails, and is relatively low in cost, safe and environment-friendly; the viscosity is moderate, hydrophilicity is easily generated with railway steel rails and train hubs, and films are easily formed; and the ultrasonic coupling agent has a good application prospect.

Description

technical field [0001] The invention relates to an ultrasonic coupling agent for flaw detection of railway rail joints and train hubs and a preparation method thereof, belonging to the technical field of ultrasonic coupling agents. Background technique [0002] Ultrasonic flaw detection is currently the most commonly used method for flaw detection of railway rail joints and train hubs; among them, the coupling agent used in ultrasonic probe detection operations is mostly engine oil, and engine oil as a coupling agent has many disadvantages: (1) Pollution Seriously, because engine oil is not easy to volatilize, the engine oil will automatically flow to the railway line during the flaw detection of railway joints, causing great pollution to the surrounding environment; It is easy to cause fire hazards, and when the railway joints are detected, the oil is easy to pollute the rails and cause hidden dangers to the train brakes; (3) the efficiency is low. When the rail joints and ...

AI Technical Summary

Problems solved by technology

[0002] Ultrasonic flaw detection is currently the most commonly used method for flaw detection of railway rail joints and train hubs; among them, the coupling agent used in ultrasonic probe detection operations is mostly engine oil, and engine oil as a coupling agent has many disadvantages: (1) Pollution Seriously, because engine oil is not easy to volatilize, the engine oil will automatically flow to the railway line during the flaw detection of railway joints, causing great pollution to the surrounding environment; It is easy to cause fire hazards, and when the railway joints are detected, the oil is easy to pollute the rails and cause hidden dangers to the train brakes; (3) the efficiency is low. When the railway joints and train hubs are inspected, the operator needs to carry and wipe the oil (4) The price is high, and the price of engine oil used for flaw detection is relatively expensive; (5) The smell of engine oil is relatively strong, which poses hidden dangers to the health of construction workers

The rail flaw detection industrial couplant has excellent sound transmission effect, anti-rust and anti-corrosion performance and low temperature resistance; but there are the following disadvantages: (1) The viscosity of the couplant is too small, and it is easy to flow when detecting the vertical joint of the rail (2) Glycerin is difficult to volatilize at room temperature, and it will remain on the rails for a long time after being painted, and the lubricating effect of glycerin will cause safety hazards to train brakes

The couplant of this invention also has the above-mentioned disadvantages, namely: (1) the viscosity of the couplant is too small, and it is easy to flow down when detecting the vertical joints of rails, making it difficult to complete the detection; (2) glycerin is difficult to volatilize at normal temperature, Brushing on the rails will last for a long time, and the lubricating effect of glycerin will cause safety hazards to train brakes

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