Reasons for installation damage and protection methods of in

Most industrial temperature sensors are of plug-in type. The insertion rod in front of the temperature sensor is its sensing end. Once damaged, it will seriously affect the measurement accuracy of the temperature sensor. Therefore, the temperature sensor will inevitably be broken during use, which will directly affect the reliable and safe operation. Therefore, the temperature sensor manufacturers remind everyone to pay attention to the use method when installing:
     Through the investigation of the rupture of the sensor insertion rod, the reasons are found, and the main reasons for the temperature sensor insertion rod rupture are as follows: The temperature sensor insertion rod is impacted by high-speed fluid, the load is too large, and the stress exceeds the limit, resulting in the insertion rod Rupture; The processing defects of the temperature sensor insertion rod itself cause stress concentration and easily cause the insertion rod to break; excessive vibration of the pipeline causes fatigue damage to the temperature sensor insertion rod; when fluid flows through the temperature sensor insertion rod, it induces vibration of the temperature sensor insertion rod. That is, the natural frequency of the temperature sensor insertion rod and the fluid vortex shedding frequency resonate. This kind of resonance phenomenon will cause the temperature sensor insertion rod to be damaged faster, leading to breakage.
     How to protect the temperature sensor inserting rod from being damaged? Mainly from the following points to strictly control the insertion depth of the sensor inserting rod. As the insertion depth increases, the force of the protective insertion rod increases quadratically. Therefore, when we measure temperature, we only need to insert the temperature sensor insertion rod into the isothermal zone of the fluid, instead of inserting it into the center point of the pipe, which is beneficial to shorten the length of the cantilever of the thermometer bag and achieve the effect of reducing the amplitude of its endpoint. . In the case of ensuring the necessary strength of the sensor insertion rod, the diameter of the temperature sensor insertion rod is optimized. Because when the diameter of the temperature sensor insertion rod increases, the force on the watch bag increases linearly, so when selecting the diameter of the watch bag, it is necessary to ensure the strength of the insertion rod reasonably and to stagger the resonance danger zone as much as possible. Change the cross-sectional shape and process the surface into a structural pattern to prevent the fluid from vortex shedding. Strictly control the quality of maintenance, do a good job in the inspection of the sensor insertion rod material, and at the same time, do a good job of flaw detection to prevent the occurrence of abnormal accidents such as weld cracks and fractures. When the system is put into operation, avoid the sudden full opening of the valve on the pipeline. At the moment when the valve is just put into operation, the temperature sensor insertion rod will bear a large unidirectional force. Therefore, when the system is first put into operation, the valve should be opened slowly to allow the system pressure to gradually rise and minimize the temperature sensor insertion rod. The pressure difference between the front and the back prevents the insertion rod from breaking due to excessive unidirectional force