An overview of the temperature sensor of casing failure reason and treatment method

In many large engineering practice, we found that the temperature sensor in used casing will burst, this will naturally affect the safe operation of the machine, in serious cases are likely to cause safety accidents. Temperature sensor manufacturers engineer pointed out that: through the sensor tube burst, need to find out the cause of the temperature sensor casing rupture: ( 1) Temperature sensor casing under the impact of the affected by high velocity, large load, stress once more than the limit, the casing will fracture; ( 2) Temperature sensor shell itself defects lead to stress concentration, easy to cause the shell burst; ( 3) Pipeline vibration if casing overload damage is caused by temperature sensor; ( 4) When the liquid flows through the temperature sensor casing, will cause the vibration of the temperature sensor casing. The natural frequency and temperature sensor casing liquid between the rotation frequency of resonance. The resonance phenomenon can cause the damage of the temperature sensor shell faster, lead to fracture. Combining with the condition of temperature sensor casing instability, several possible combined with thermal control and metal disciplines are studied. ( 1) High standards of strict controls of sensor sleeve insertion depth. As the insert depth increasing, the strength of the nature on the cases with increased. Therefore, when we measure the temperature, we only need to insert the temperature sensor shell fluid isothermal region and not insert it into the center of the pipe, which is beneficial to shorten the thermometer cantilever length of bag. And to reduce the amplitude at the end of. ( 2) To optimize the diameter of the casing temperature sensor, ensure that the necessary strength sensor casing. Because when the temperature sensor casing diameter bigger, the casing pressure increases linearly, so when choosing casing diameter, need reasonable guarantee the strength of the casing, try to stagger the resonance of the danger zone. ( 3) By changing the cross section shape, the surface of the cross section is made into a structure design, it won't produce vortex shedding flow. ( 4) Strictly control the quality of maintenance, well casing material sensor detection, defect detection, strict welding cracks, fracture and other abnormal accident prevention. ( 5) The system is put into operation, to avoid suddenly opened the valve in the pipeline. When operating valves open, the temperature sensor bushing will suffer great ChanXiangLi. Therefore, when the system was put into operation, should slowly open the valve to gradually increase the system pressure, and as far as possible to reduce the temperature sensor shell. Between the front and rear pressure due to excessive ChanXiangLi general prevent shell burst. Temperature sensor factory engineer said, at last, when any sensor is put into use, there is always some unexpected situation. Theory with practice, in view of the specific circumstances corresponding processing method is put forward.
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