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technical article
The main influencing factors of wear-resistant thermocouple
2012-2-18 12:17:06

由于针对不同温度范围及被测介质而采用不同的高强度耐磨保护管及表面改性措施,构成复合管型实体化结构本系列产品适用于对保护管磨损严重的石油化工,输煤系统,流化床式锅炉,水泥熟料及耐火材料等流动粉体及物料的温度测量。 The wear-resistant thermocouple adopts different high-strength wear-resistant protective tubes and surface modification measures for different temperature ranges and measured media to form a composite tube-type solid structure. This series of products are suitable for petrochemical industries that have severe wear on protective tubes. Temperature measurement of flowing powder and materials such as coal conveying system, fluidized bed boiler, cement clinker and refractory. Further increase the life of the thermocouple. Its performance is better than the current wear-resistant thermocouples, and has won praise from users. With a number of high-tech products at the international advanced level, its special technology of wear-resistant materials completely solves the service life of the thermocouple of the circulating fluidized bed boiler temperature measurement without affecting the temperature measurement hysteresis, and the protective sleeve is resistant to Grinding, high temperature oxidation resistance, corrosion resistance, corrosion resistance of cement materials such as liquid iron powder, limestone, erosion resistance, vibration resistance and other technologies make the temperature measuring thermocouple service life generally one to two years.

是电厂循环流化订锅炉,沸腾锅炉,粉磨煤机造气炉和水泥厂系列窑头,窑尾,炉头罩及化工,冶炼等高温耐磨环境较为理想的高技术类专用产品,G系列博采众长,采用独特的工艺配方,在失态平衡中制作出耐磨合金该产品与普通不锈钢金属,金属陶瓷保护管,与市场上同类耐磨合金保护管相比,其使用寿命提高1-5倍.由于环境温度差,温控点过高,振动较大,鼓风机风速过高,磨损严重,造成温度测量非常困难,使用寿命很短暂,一般的耐磨合金只有10-90天就磨透损坏,烧弯,折断,造成热电偶损坏,给用户带来很大的损失和不必要的麻烦,本公司生产的G系列弥补了这个缺点. Abrasion-resistant thermocouples are high-tech types that are ideal for high-temperature and wear-resistant environments such as circulating fluidized boilers, boiling boilers, gasifiers for coal mills, and kiln heads, kiln tails, furnace head covers, and chemical and smelting in power plants. Dedicated product, G series draws many advantages and adopts unique process formula to make wear-resistant alloy in out of balance. This product is compared with ordinary stainless steel metal and cermet protection tube, and its service life is improved compared with similar wear-resistant alloy protection tube on the market. 1-5 times. Due to the difference in ambient temperature, the temperature control point is too high, the vibration is large, the blower wind speed is too high, and the wear is serious, which makes the temperature measurement very difficult and the service life is very short. The average wear-resistant alloy is only 10-90 days. Wear-through damage, burn-off, breakage, and damage to the thermocouple will cause great losses and unnecessary trouble for users.The G series produced by our company makes up for this shortcoming.

测量误差出现的主要影响因素1插入深度的影响< The main factors influencing the measurement error of wear-resistant thermocouples 1 The influence of the insertion depth <
1) Selection of temperature measurement point The installation position of the thermocouple, that is, the selection of the temperature measurement point is the most important. The location of the temperature measurement point must be typical and representative for the production process. Otherwise, it will lose the meaning of measurement and control. 2) When inserting a deep thermocouple into the measured place, it will produce along the length of the sensor. Heat flow. There is heat loss when the ambient temperature is low. As a result, the temperature of the thermocouple and the measured object are inconsistent, resulting in a temperature measurement error. 2 The effect of response time The basic principle of temperature measurement by contact method is that the temperature measuring element must reach thermal equilibrium with the measured object. Therefore, it is necessary to maintain a certain time during temperature measurement to achieve thermal equilibrium between the two. The length of the holding time is related to the thermal response time of the temperature measuring element. The thermal response time depends on the structure of the sensor and the measurement conditions. For gaseous media, especially stationary gas, it should be maintained for at least 30 minutes to reach equilibrium; for liquids, the fastest time is more than 5 minutes. For the measured place where the temperature changes continuously, especially the transient change process, the whole process is only 1 second. Clock, the response time of the sensor is required in milliseconds. Therefore, ordinary temperature sensors not only fail to keep up with the temperature change rate of the measured object, but also cause measurement errors due to failure to achieve thermal equilibrium. It is best to choose a sensor that responds quickly. For thermocouples, in addition to the protection tube, the diameter of the measuring end of the thermocouple is also its main factor. That is, the thinner the wire, the smaller the diameter of the measuring end, and the shorter the thermal response time. The thermal response error of the temperature measuring element can be determined by the following formula.