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

In many large engineering application, we found that the temperature sensor sleeve fracture happens in use, this will naturally affect the safe operation of the machine, severe cases, is 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) Under the impact of the high velocity, the stress exceeds the limit, the temperature sensor shell will be broken; ( 2) Temperature sensor shell itself defects can lead to stress concentration, thus break very easily lead to shell; ( 3) If the pipeline vibration, temperature sensor shell damage due to overload; ( 4) When the liquid flows through the temperature sensor casing, will cause the vibration of the temperature sensor casing. Temperature sensor casing of natural frequency and rotating frequency resonance phenomenon between liquid will result in faster temperature sensor shell damage, can also lead to fracture phenomenon. Combining above may result in case of temperature sensor shell burst, laws of thermal control of the temperature sensor and metal are studied. ( 1) Should handle good sensor sleeve insertion depth. With the increase of the insertion depth, the effect on the cases focus on natural also will increase. So when measuring temperature, need to insert the temperature sensor shell isothermal region of the fluid. ( 2) The temperature sensor is the diameter of the casing is optimized, to ensure that the sensor casing strength as needed. When the temperature sensor when the diameter of the shells get bigger, the pressure of the shell increases linearly. Therefore, when choosing casing diameter, to ensure reasonable casing strength, try to stagger the resonance often occurred in the danger zone. ( 3) By changing the cross section shape, the surface of the cross section can be converted to a form of structure, the fluid will not fall out from the vortex. ( 4) Strictly control the quality of maintenance, completes the shell material of sensor identification, fault detection, beware of welding, such as breakage of abnormal accidents. ( 5) When the system put into operation, to avoid the suddenly open valve in the pipeline. If the valve opening and operation, the temperature sensor into a large one-way street carrying socket. If the system is put into operation, if the valve opened slowly and gradually increase the system pressure and temperature sensor shell to reduce as much as possible. The before and after the pressure difference between the two word is too big, can prevent the before and after the pressure difference between the two way too big. Temperature sensor manufacturers engineer last mentioned: when a sensor is debugging, will inevitably be always unexpected situation. Theory needs to be combined with the actual situation, to form the corresponding methods should be appropriately handled.

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