The wear-resistant thermocouple adopts special heat-resistant material and wear-resistant alloy material as the temperature measuring outer casing and wear-resistant head. The connection method can be used for long-term temperature measurement in the range of 0-1300 degrees. It is an ideal temperature sensor for temperature measurement and wear-resistant protection tube in metallurgy, chemical industry, cement plant, power plant, and waste incineration industry in high temperature and wear-resistant environments. There is an armored core inside, which has high wear resistance, corrosion resistance, oxidation resistance and erosion resistance. The protective tube can protect the inner armored core well under high temperature conditions, and the service life is z.ui High can be as long as two years. The components of wear-resistant thermocouples include wear-resistant heads, connecting rods, threaded connections or flanges, junction boxes, and armored inner cores. The wear-resistant heads should be made of materials according to the actual temperature at the production site, connecting rods, threaded connections or flanges. The material should be selected according to whether there is corrosive medium on site.

Types of wear-resistant thermocouple protection tubes:

1. High temperature alloy wear-resistant: special heat-resistant and wear-resistant alloy materials are used as the outer protection tube for temperature measurement, and the inner armored core body has high corrosion resistance to particle erosion, and can be used for internal protection under high temperature conditions. The core plays a good protective role. With flange or threaded connection, temperature measurement can be performed between 0-1200 °C for a long time.

2. Composite casting wear-resistant alloy: The composite armoring technology is used to add wear-resistant particles to the superalloy matrix, and precision casting is used. No turning is required, the casing has high hardness, high temperature oxidation resistance, a few casting defects but does not affect the high temperature wear resistance and sealing performance.

3. Cermet wear-resistant: It adopts recrystallized silicon carbide metal ceramic protection tube, the high temperature can reach 1300 ℃, and the built-in K-grade or S-grade armored core is specially suitable for high temperature resistance of cement kiln tail, circulating fluidized bed, etc. Temperature measurement of grinding conditions.

4. Ion implantation of tungsten carbide: tungsten carbide particles are implanted on the surface of the casing by ion implantation technology with stainless steel as the base. It has high hardness, high strength and special wear resistance. The thickness of the wear layer is 0.5-1.5mm, the outer hard is hard and the inner tough, the small diameter can reach φ8, the surface quality is good, and the operating temperature is 0-800 ℃. The service life of coal mills in power plants is more than 2 years.

5. Iron-aluminum-ceramic protection tube: The iron base contains aluminum and A12O3 powder is added skillfully, that is, the iron-aluminum-ceramic (TLC) especially contains gold, and the iron-aluminum-ceramic alloy is made into a thermocouple (resistance) protection tube, that is, iron The key part of the aluminum-ceramic thermocouple (resistance) z.ui - the iron-aluminum-ceramic protection tube. According to the working temperature, wear condition, medium type, pressure equation, different series of iron-aluminum-porcelain protection tubes are made. The existing series are: TLC, TLC1, TLC2, TLC3, TLC4 five series.

TLC type: resistant to hydrochloric acid, nitric acid, sulfuric acid, sodium hydroxide and potassium hydroxide solution. The working temperature is divided into 350 degrees and 750 degrees.

TLC1 type: oxidation resistance, vulcanization resistance, zinc vapor corrosion resistance, high wear resistance, good thermal shock resistance, working temperature 1100 degrees.

TLC2 type: working temperature is 1250°C, wear resistance is lower than TLC1 type, compared with ceramic tube Protective tube.

TLC3 type: It is improved from TLC2 type. In addition to the characteristics of TLC2 type, the wear resistance has been specially improved, which is much higher than that of TLC1 type. Under the same working conditions, the service life can be doubled. Operating temperature 1300°C.

TLC4 type: It is made from TLC1 type. In addition to the characteristics of TLC1 type, it has a special improvement in wear resistance, which is much higher than that of TLC1 type. Under the same working conditions, the service life can be increased by three times. 1100°C. After practical use, the service life of the protective tube for temperature measurement at the inlet and outlet of the ball mill can reach 36 months.