I.Core Parameters

Wear-resistant thermocouples adopt high-strength wear-resistant protective sleeves and surface modification measures, and absorb the wear-resistant technical expertise of multiple industries to develop a series of new products. It is widely used in the mixing measurement of flowing powders and materials such as circulating bed boilers, boiling boilers, petrochemical industries, coal conveying systems, cement clinker and refractory materials with serious wear of protective tubes. The service life in circulating fluidized bed boilers is more than one year. According to the characteristics of wear-resistant casing, it is divided into the following six categories:

II. Technical parameters

1. Wear-resistant superalloy: According to the characteristics of high-temperature wear environment, the specially designed pure alloy is made of vacuum smelting, which has high temperature oxygen resistance and extremely high high temperature strength, and is made by forging and drilling as a whole. Less processing defects, high reliability, high temperature strength and wear-resistant comprehensive performance, high price, use temperature 800~1280 °C.

2. Composite casting wear-resistant: Composite armor technology is used to add wear-resistant particles with high-temperature alloy as the matrix, and precision casting is formed. It does not need to be turned, the casing has high hardness, high temperature oxidation resistance, a few casting defects but does not affect the high temperature wear resistance and sealing, it is the most commonly used high-temperature wear-resistant casing, the price is moderate, and the use temperature is 800~1200 °C.

3. Multi-seed injection tungsten carbide: Tungsten carbide particles are injected on the surface of the casing using ion injection technology with stainless steel as the matrix. It has high hardness, high strength and high toughness, especially wear-resistant, the thickness of the wear-resistant layer is 0.5~1.5mm, the outer is hard and the inner toughness, the minimum diameter can be to 8, the surface quality is good, and the service temperature is 0~800 °C. The service life in the coal machine of the power plant is more than 2 years.

4. Composite ceramic wear-resistant casing: with stainless steel as the matrix, it is compounded with ceramic materials by high-temperature bonding and elastic filling technology, with simple structure, good wear resistance, low cost, and a service temperature of 0~800°C.

5. Surface surfacing and spraying wear-resistant: Stainless steel as the matrix surface surfacing tungsten carbide or other wear-resistant tissues, or surface spraying combined with wear-resistant particles to improve surface hardness and increase wear resistance. It is difficult to process and has poor reliability, so it is gradually not used.

III. Related Component Specifications

Protective Sleeve:

Wear-resistant high-temperature alloy sleeve: Formed by integral forging and drilling, no additional splicing structure, with good comprehensive performance of high-temperature strength and wear resistance.

Composite cast wear-resistant sleeve: Formed by precision casting, no turning processing required. There are a few casting defects, but they do not affect high-temperature wear resistance and sealing.

Tungsten carbide implanted sleeve: Tungsten carbide particles are implanted on the surface of stainless steel substrate. The wear-resistant layer thickness is 0.5~1.5mm, the minimum diameter can reach 8mm, and the surface quality is excellent.

Composite ceramic sleeve: Stainless steel substrate combined with ceramic material, with simple structure and good wear-resistant effect.

Thermocouple Body: Compatible with base metal thermocouple cores such as K-type, which are assembled with wear-resistant sleeves to meet the signal transmission requirements of industrial temperature measurement.

IV. Application Scenarios

Wear-resistant thermocouples are mainly used in industrial scenarios where the protective tube is prone to severe wear, including:

Power Industry: Circulating fluidized bed boilers, bubbling boilers, power plant coal mill systems

Petrochemical Industry: Temperature measurement links for powder and material flow mixing

Coal Industry: Temperature monitoring of coal conveying systems

Building Materials Industry: Temperature measurement in the production process of cement clinker and refractory materials

V. Product Advantages

Targeted Wear-Resistant Design: Five types of wear-resistant products are designed according to different high-temperature and wear working conditions, which can accurately match various harsh industrial temperature measurement environments.

Reliable Product Quality: The manufacturer has multiple certifications such as SIL 2 functional safety certification, intellectual property management system certification, and ISO 14001 environmental management system certification. The products have undergone strict testing and have stable performance.

Strong Adaptability: It can be integrated with various industrial temperature measurement systems, meeting the temperature monitoring needs of complex working conditions such as circulating fluidized beds and coal conveying systems, without the need for major modifications to existing equipment.

Rich Industry Application Experience: The products have served well-known enterprises and institutions such as BYD Auto, AVIC Industry, AECC, and China Minmetals, accumulating mature application cases in multiple industries.

VI. Frequently Asked Questions (FAQs)

How to select different types of wear-resistant thermocouples?

Answer: For high-temperature and severe wear working conditions (800~1280℃), the wear-resistant high-temperature alloy type can be selected; for 800~1200℃ working conditions pursuing cost-effectiveness, the composite cast type is optional; for medium-low temperature (0~800℃) scenarios with extremely high wear resistance requirements, such as power plant coal mills, the multi-seed implanted tungsten carbide type is suitable; for low-cost needs and 0~800℃ working conditions, the composite ceramic type can be chosen.

Why is the surface overlay welding & spray wear-resistant type gradually phased out?

Answer: This type of product has high processing difficulty and poor reliability. In long-term industrial applications, its performance cannot meet the requirements of stable temperature measurement, so it is gradually replaced by better wear-resistant types.

Is there any difference between the installation of wear-resistant thermocouples and ordinary thermocouples?

Answer: The installation method is basically the same as that of ordinary thermocouples. However, since the wear-resistant sleeve is mostly a custom structure, attention should be paid to the adaptability with the installation part to avoid damage during installation due to the high hardness and brittleness of the sleeve (such as the ceramic type).

What should be paid attention to in the maintenance of wear-resistant thermocouples?

Answer: Regularly check the wear condition of the protective sleeve, especially under high-wear working conditions; for the composite cast type with casting defects, check whether the defects affect the sealing and temperature measurement accuracy; when replacing, the corresponding type of wear-resistant sleeve should be matched to ensure that the temperature measurement performance remains unchanged.

Is there any guarantee for the quality and after-sales service of wear-resistant thermocouples?

Answer: The manufacturer has a sound quality management system and certification qualifications, and provides professional technical support. After-sales treatment for product quality issues can be carried out in accordance with relevant standards. At the same time, customized wear-resistant thermocouple solutions can be provided according to the customer's working conditions.

Manual Welding

Automatic Welding

Insulation Testing

Laser Marking

Warehouse Managing

Thermocouple Assemble

Vacuum Leak Detection

Surface Polishing

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