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In a thermocouple, the line used from the sensing point to the cold junction compensation point (cjc junction) where the signal is measured. A thermocouple is a sensor that measures temperature and consists of two dissimilar metals joined at the sensing end. Different types of thermocouples (such as J, K, T, E, etc.) use different metal wire combinations. At the cold junction compensation end, the millivolt value provided by the thermocouple represents the temperature difference between the sensing end and the cold junction compensation end (also called the reference end). The insulation of the thermocouple wire is identified by color coding. Common guidelines include the negative lead in the insulated thermocouple compensation wire being red, and the positive lead being the same overall color as the compensation wire. Thermocouple wire jackets are usually brown. High temperature wires are usually white. Standard and special error limits are related to the temperature of the wire. Special error limited wires are the same as standard error limited wires, but have a higher temperature. Thermocouple accuracy varies with the type of thermocouple. For example, the lower temperature range T-type, which consists of positive copper wire and negative constantan (copper-nickel mix), has good accuracy specifications. Thermocouple wire is the wire used to create the sensing point of a thermocouple. Compensating wires are used only to extend the thermocouple signal to the meter that reads this signal. The compensation wire usually has a lower ambient temperature limit, that is, it can pass the higher temperature signal obtained from the probe, but it is not exposed to the higher temperature itself. Thermocouple wire can be used as compensation wire, but compensation wire cannot be used to make the sensing point (or probe part) of the thermocouple. The product numbers for compensating conductors usually begin with the prefix "EX".

Electric heating uses electric heating equipment to convert electrical energy into thermal energy. Through direct or indirect heat exchange, it supplements the heat lost by the heating equipment through the insulation material, and uses temperature control to track and control the medium in the heating equipment. temperature to maintain it at a reasonable and economical level. In the past, steam tracing has always been a primary method of insulation. Its working principle is to dissipate heat through steam tracing pipes to supplement the heat loss of the insulated pipes. Since the heat dissipation of steam is difficult to control, its thermal insulation efficiency is always at a low level. In the 1970s, the U.S. energy industry proposed the idea of using electric heating to replace steam heating. In the late 1970s and early 1980s, many industrial sectors, including the energy industry, had widely promoted electric heating technology, replacing steam heating with electric heating. Since the development of electric heating technology, it has developed from traditional constant power heating to self-controlled temperature electric heating with conductive plastic as the core.

1. High-temperature wires and cables Material innovation: High-temperature wires and cables are often used in extreme temperature environments, such as aerospace, automotive, and industrial heating systems. The latest developments focus on the use of new high-temperature resistant materials, such as polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), and ceramic fibers to improve their heat resistance and durability. Application expansion: With the rapid development of electric vehicles and renewable energy, the demand for high-temperature cables in battery management systems and solar power generation systems has increased. High-temperature cables are also widely used in high-temperature and high-pressure environments in the oil and gas industry.   2. Compensation wires Accuracy improvement: Compensation wires are used in thermocouple systems to compensate for errors in temperature measurement. The latest compensation wires use higher-purity metal alloys, such as copper-nickel alloys, to improve the accuracy and stability of measurements. Intelligence: With the development of Industry 4.0 and the Internet of Things (IoT), compensation wires are gradually integrated with smart sensors and data analysis systems to achieve real-time monitoring and automatic calibration.   3. Thermocouples New thermocouple materials: Thermocouples are key components for temperature measurement, and the latest research focuses on the development of new thermocouple materials, such as silicide and silicon carbide, to improve their stability and sensitivity in high temperature ranges. Miniaturization and integration: With the development of microelectronics technology, thermocouples are moving towards miniaturization and integration, suitable for medical devices, micro sensors and portable electronic devices. Wireless thermocouples: Wireless thermocouple technology is emerging, which reduces wiring complexity by wirelessly transmitting temperature data, and is particularly suitable for industrial environments where wiring is difficult.   4. Market trends Demand growth: With the development of industrial automation and intelligent manufacturing, the market demand for high-temperature wires, compensation wires and thermocouples continues to grow. In particular, in the fields of energy, automobiles and aerospace, the demand for high-performance temperature measurement and control systems continues to increase. Environmental protection and sustainability: Manufacturers are paying more and more attention to environmentally friendly materials and production processes to reduce the impact on the environment. For example, the use of recyclable materials and low-energy manufacturing processes.   5. Technical Challenges Stability in high temperature environments: Material stability and durability remain major challenges in extreme high temperature environments. Researchers are developing new coatings and composite materials to improve the high temperature resistance of wires and thermocouples. Cost control: High-performance materials are expensive, and how to reduce costs while ensuring performance is a major issue facing manufacturers.

Recently, a leading domestic cable manufacturer announced that it has made major technological breakthroughs in the field of high-temperature cables. This new high-temperature cable uses innovative materials and advanced processes to maintain stable electrical performance and mechanical strength in extremely high temperature environments, providing safer and more reliable solutions for industrial manufacturing, energy transmission, aerospace and other fields.   High-temperature cables: key components in extreme environments High-temperature cables are special cables that can work stably for a long time in high-temperature environments. They are widely used in metallurgy, chemical industry, electric power, aerospace and other fields that require extremely high temperature resistance. Traditional high-temperature cables are prone to problems such as insulation aging and conductor oxidation in long-term high-temperature environments, resulting in performance degradation or even failure, posing safety hazards to industrial production.   The new high-temperature cable developed this time uses high-performance heat-resistant materials and innovative insulation layer design. The conductor part uses special alloy materials, which can maintain stable conductivity in environments up to 1000°C; the insulation layer uses a new ceramic silicone rubber material, which is not only resistant to high temperatures, but also has excellent anti-aging and anti-corrosion properties. In addition, the outer sheath of the cable has been specially treated and can be used for a long time in high temperature, high humidity and chemical corrosion environments. Significant performance advantages According to test data, the service life of the new high-temperature cable in high temperature environment is more than 50% longer than that of traditional products, and its electrical performance and mechanical strength are significantly improved. In extreme environments, the new cable can withstand higher voltage and current loads, and is not prone to short circuit or open circuit, which greatly improves the safety and reliability of equipment operation.   Wide application fields The introduction of new high-temperature cables has brought good news to many industries. In the metallurgical industry, it can be used for power transmission in high-temperature furnaces and kilns, significantly reducing the failure rate of equipment; in the chemical industry, it can withstand the erosion of corrosive gases and liquids to ensure the continuity of the production process; in the aerospace field, its lightweight and high temperature resistance provide guarantees for the safe operation of aircraft.   In addition, with the rapid development of the new energy industry, high-temperature cables are increasingly used in solar thermal power generation, nuclear power generation and other fields. The introduction of new high-temperature cables will provide more efficient and safer power transmission solutions for these fields.   Broad market prospects With the improvement of industrial automation and intelligence levels, as well as the rapid development of high-end manufacturing fields such as new energy and aerospace, the market demand for high-temperature cables continues to grow. According to industry data, the global high-temperature cable market is expected to grow at an average annual rate of 10% in the next five years. This technological breakthrough not only enhances the competitiveness of domestic high-temperature cables, but also brings new growth points to related industries.   At present, the new high-temperature cable has passed a number of international quality certifications and has begun mass production. Many domestic and foreign companies have reached cooperation intentions with the company, and it is expected to occupy an important share of the global market in the future.   Industry response Industry experts said that this breakthrough in high-temperature cable technology not only fills the domestic technical gap in this field, but also provides new solutions for efficient and safe operation in the global industrial and energy fields. With the continuous maturity of technology and the deepening of application, this innovative achievement will bring dual benefits of efficiency improvement and cost optimization to more industries.

1. Halogen-free: Using low-carbon environmentally friendly cable sheaths, wire sheaths and specially made oxygen-barrier materials, it not only has excellent motor performance and physical and mechanical properties, but also ensures that the product does not contain halogen bulbs, and is composed of "di" "sub-pollution" to prevent the emergence of "dioxin" emergency supplies, which may cause carcinogens during the incineration of traditional PVC cables.   2. High flame retardant grade: Environmentally friendly high-temperature cables must thoroughly ensure that they have high fire safety standards. High-temperature cables are not easily incinerated when on fire, and can prevent the spread of flames and the expansion of disasters after incineration.   3. Low endotoxin: The insulation layer and sheath do not contain lead, cadmium and other heavy metals that are harmful to the human body. When using high-temperature cables and handling waste applications, it is not easy to cause environmental pollution to soil and water resources. After trying serious toxicity and side effects, the white mouse is safe and harmless under prescribed conditions.   4. No etching gas is generated: Using a new type of special coating with zero pollution to the natural environment, it is not easy to produce harmful gases such as hydrogen chloride during production, use and incineration, and the acid gas discharged is small, which causes little damage to the staff and weapons and equipment, and has more environmentally friendly characteristics.   5. Moisture-proof and UV-proof: Using low-carbon environmentally friendly materials, the different general molecules are reasonably arranged to ensure extremely low water absorption. Unlike general UV extractors, this product has an excellent UV blocking effect. Ensure the safety factor of using such products and extend the service life.   6. High light transmittance: Very little smoke is generated during the incineration process, which is conducive to the evacuation of personnel for fire fighting. The light transmittance of the product exceeds 40%, which is much higher than the 20% limit of traditional flame-retardant electronic wires.

The long-term allowable current carrying capacity of high-temperature cables refers to the current value when the temperature of the conductor of the high-temperature cable just reaches the long-term allowable operating temperature after the current passes through the cable to achieve thermal stability. The current carrying capacity depends on the high operating temperature allowed by the product, and is related to the energized working system (such as long-term continuous load, variable load, intermittent load operation, etc.), the wire and cable laying method and environmental conditions. Generally speaking, the current carrying capacity refers to the allowable working current when the long-term continuous load is running, and the corresponding conversion is made under other conditions. Wires and cables used in power supply and lighting circuits need to be used in some special occasions, such as the high-voltage ignition wire of the vehicle and the compensation wire of the instrument measurement system, and there is no current carrying requirement. Cable manufacturers only provide the correct cable cross-section data, not the rated current data of the cable. Since the rated current of the cable is related to the environment, the duty cycle of the load, the allowable operating temperature of the cable insulation material, and the allowable voltage drop of the cable, the electrical designer of the purchaser should comprehensively consider and select the appropriate cable section. There is a misunderstanding about the economic cross-section of the cable. Some designers and owners believe that if the temperature rise does not exceed the standard, a small part of the cable is the economic part. This is a wrong view because he ignores the economic loss caused by the energy consumption of the cable itself. Under the same load, the larger the cable cross-sectional area, the smaller the current density of the cable, and the smaller the energy consumption of the cable. The temperature rise of high-temperature cables is related to the current density. The higher the current density, the higher the temperature rise. The life of the insulation material is related to the working temperature of the insulation material. The higher the working temperature of the insulation material, the shorter its life. The economic cross-section of the cable is a comprehensive parameter involving the initial investment cost of the cable, the energy consumption cost during the service life of the cable, and the service life of the cable. The generally accepted view in China is that the economic cross-section of the cable is twice the cross-section, considering only the temperature rise.

Classification of high temperature wires There are many types of high temperature wires. Commonly used ones are fluoroplastic insulated high temperature wires, silicone rubber insulated high temperature wires, silicone rubber insulated braided wires, multi-core high temperature cables, mineral insulated fire-resistant cables and high temperature electronic wires. Teflon wires, aircraft wax wires, nylon sheathed wires, Teflon high voltage wires, silicone rubber high voltage wires, mica high temperature wires. Uses of high temperature wires Material of high temperature wires High temperature wires usually have two materials: one is: silicone rubber, which has better softness, and the other is: polytetrafluoroethylene material (ie PTFE), and polytetrafluoroethylene material is a harder silicone rubber material. It can be used for the installation and connection of circuits with an AC rated voltage of 500 volts and below, and is widely used in electric heating equipment, paint rooms, lighting equipment and household appliances. Teflon materials can be used in instrumentation, aerospace, electric power smelting, chemical industry, ships, vehicles, food machinery, household appliances, ovens, etc. It has excellent corrosion resistance, oil resistance, strong acid resistance, strong alkali resistance, strong oxidant resistance, etc. ; It has excellent electrical insulation performance, high voltage resistance, low frequency loss, no moisture absorption, and large insulation resistance; It has excellent flame retardancy and anti-aging properties and a long service life. In the electronics industry, it can be used for temperature compensation wires, low temperature resistant wires, high temperature heating wires, anti-aging wires, and flame retardant wires; In the household appliance industry, it can be used for air conditioners, microwave ovens, electronic disinfection cabinets, rice cookers, electronic thermoses, and electrical heaters, electric ovens, electric frying pans, and the internal wiring of lamps.

With the structural adjustment, industrial upgrading, energy conservation and environmental protection of the heavy and chemical industry, new industrial construction projects require a large number of matching motor products, which further broadens the application fields of motor products and creates new developments for the entire industry. opportunity. Therefore, the motor special wire and cable industry has also brought greater development demand. Time flies, science and technology are changing with each passing day, and the motor industry, as an important force in promoting the development of modern industry, has put forward higher requirements for the quality of wires and components. In order to meet the needs of the motor industry with constantly upgrading technology, Shanghai Dianyuan High-temperature Wire Co., Ltd. adheres to the concept of innovative research and development and launched a trend-leading high-temperature wire-"G series. With its excellent performance and reliable quality, this wire has become the first choice for all types of motors. JG series high-temperature wires have excellent high-temperature resistance properties thanks to their use of silicone insulation material. Silicone has good insulation properties and high temperature resistance, and can maintain stable and reliable current transmission in extreme working environments (-60℃~+180℃). Whether it is a high-speed motor or a generator with a large load, G series high-temperature wires can do the job and provide strong power support for the motor. In addition to good high-temperature performance, the G series high-temperature wire also has excellent mechanical strength and softness. It uses high-quality conductor materials and coatings to withstand the influence of external forces such as flexion, tension, and pressure. make It can operate stably for a long time in severe industrial environments without being affected by harsh external conditions. The emergence of JG series high-temperature wires not only provides new solutions for the research and development and application of motor products, but also brings benefits to the development of the motor industry. New opportunities have emerged. As the main product of Shanghai Shenyuan High Temperature Wire Co., Ltd., JG series high-temperature wires will surely lead the future development of the motor industry, allowing motor products to advance rapidly under the dual drive of technological innovation and quality assurance. Shine on the industrial stage. In the future development, the motor industry will continue to usher in more competitions and opportunities. Shanghai Dianyuan High Temperature Wire Co., Ltd. will continue to devote itself to innovative research and development, continuously improve product performance and service quality, and make greater contributions to the prosperity of the motor industry. I believe that under the leadership of G series high-temperature wires, the motor industry will surely move towards new glory.

Recently, Jiangsu Pengshen High Temperature Cable Co., Ltd. successfully developed a high-temperature resistant cable product that can operate stably in high-temperature environments, greatly improving the efficiency and safety of power transmission. It is reported that this high-temperature cable uses the latest materials and technology and can continue to work in an environment with high temperatures reaching 200 degrees Celsius, far exceeding the high temperature resistance of traditional cables. This means that in high-temperature environments, power equipment can operate more stably, reducing the risk of accidents caused by cable aging. This kind of high-temperature cable is not only widely used in the field of power transmission, but also can be used in high-temperature environments in industrial production, such as oil refineries, steel plants, etc. This will provide more stable and reliable power support for industrial production and improve production efficiency and safety. In addition, this high-temperature cable also has good wear and corrosion resistance, has a longer service life and is more durable. This will bring greater convenience to the maintenance and management of power equipment and reduce maintenance costs and risks. The successful research and development of this new type of high-temperature cable marks a major breakthrough in my country's power equipment manufacturing field and will provide more reliable and efficient technical support for the development and modernization of my country's power industry.

Fire-resistant wire is made of glass fiber braid + fluorophlogopite tape, which is processed by special technology. Its main features are high temperature resistance, insulation, fire retardant, corrosion resistance, aging resistance, weather resistance, high strength, high modulus, and anti-static etc. characteristics. Fire-resistant wire can still be used normally for a period of time in case of fire. The maximum temperature of refractory wire can reach 1500 degrees. Shenyuan`s conventional refractory wires are 350 degrees, 450 degrees, 500 degrees, 1000 degrees, and 1500 degrees.

1. High temperature resistance: The high temperature resistance of high temperature wires is its most basic feature. Generally, the maximum temperature that high-temperature wires can withstand is 1000°C. This is because high-temperature environments can cause the cable material to melt, thereby disabling the function of transmitting data or power. Therefore, high-temperature wires used in high-temperature environments must have higher melting points and melting temperatures. 2. Corrosion resistance: Corrosion often occurs in some high-temperature environments. Therefore, the corrosion resistance of high-temperature wires is also very important. High-temperature wires are often used in environments containing chemicals that may adversely affect sensor cables. Therefore, high-temperature wires must be resistant to corrosion and acid attack. 3. Wear resistance: High-temperature wires are often used in high-temperature, high-pressure, and high-speed environments, such as in aircraft, automobile engines, and other fields. Because high-temperature wires often come into contact with high-speed rotating mechanical parts, or are subject to strong friction and vibration during the operation of equipment, high-temperature wires must have high wear resistance. 4. Safety: In high-temperature environments, equipment and projects are subject to higher risks. Therefore, high-temperature wires must have high safety and be able to maintain their stability in high-temperature environments to avoid equipment failures and accidental injuries.