How to distinguish the quality of self-controlled temperature electric heating belt? How to choose the type of electric heating belt correctly?

Among them, the electric heating belt with self-control temperature has become the first choice for pipeline electric tracing in many petrochemical and fire-fighting enterprises because of its wide application fields, convenient installation and maintenance, and automatic temperature control. Self-control electric heating belt is a national key scientific and technological research plan. Due to various complicated reasons, the domestic research is relatively backward. Due to the limitation of production equipment, raw materials, technical level and process conditions, the parameters of self-controlled electric heating belt are unstable, the starting current is large, the heat resistance is poor, the service life is short, the manufacturing technology level is low, and the product quality is uneven. If the user accidentally uses inferior electric heating belt, it will short-circuit and trip, and it will also lead to the fire of heat tracing pipeline and even burn out important components such as heat tracing equipment. How to distinguish the quality of self-controlled temperature electric heating belt? How to distinguish the advantages and disadvantages of electric heating belt is the most important thing in purchasing electric heating belt. The specific analysis is as follows: 1. Conductive copper wire: Self-controlled temperature electric heating belt is a flat long belt, and the quality of its conductive wire is also directly related to the quality of cable. Usually, the conductive wire core is twisted with tin-plated or nickel-plated copper wire. In manufacturing, besides selecting the tin-plated copper wire with good quality, the influence of the surface state of the conductive wire core on the electric heating belt must also be considered, and the selection of wire diameter can not cut corners, which lays the foundation for the production of PTC core belt. 2. Starting current PTC core belt is the core part of electric heating belt, and it is difficult for general manufacturers to master its core technology. Its key coefficients are starting current and attenuation rate. Starting current refers to the peak value of the maximum current generated instantly when the electric heating belt is connected to the power supply. It is of decisive significance to the quality of electric heating belt, and it is the key parameter to reflect the manufacturing technology level of electric heating belt. If the starting current is large, the service life of the electric heating belt with single power supply will be shortened, and at the same time, the electrical contact interface between PTC layer and conductive wire core will be destroyed every time it is started, which will shorten the service life of the electric heating belt and have great safety hazards. At present, the starting current of most domestic manufacturers' products is generally around 0.9- 1.2A/m, while that of American Ruikan Company is below 0.5A/m, while that of electric heating belts produced by Anhui Huanrui Electric Tracing Company is below 0.6A/m, which is close to the international level and reaches the domestic leading level. Therefore, users must understand the important technical parameter of starting current when purchasing, and it is best if conditions permit. 3. Decline rate Decline rate refers to the degree of temperature and power attenuation of electric heating belt with the extension of service life, and its technology is difficult to master. The decline rate in foreign countries is small, and the service life can reach more than 15 years, while it is generally relatively large in China, with a service life of only 4-5 years. At present, our company has adopted double-layer ultra-thin extrusion technology after many experiments. The thickness of low resistance transition layer is controlled at 0. 15mm, and the extrusion is successful once in 30 km. The process parameters are relatively stable, and the maximum maintenance temperature is also within the controllable range. The starting current is lower than 0.6A/m, and the service life is longer than 10 year, reaching the international level and leading in China. 4. Radiation processing technology PTC core tape needs radiation crosslinking to have the best PTC effect. The quality of crosslinking determines the stability and service life of the core belt. At present, high-energy electron irradiation crosslinking is widely used in China, and the appropriate irradiation dose is determined according to PTC material system. In addition, the dose rate should not be too large, the linear velocity should be uniform during irradiation, and the tension and friction of operation should be controlled well. In the process of radiation cross-linking, there is no cross-linking in China. It seems that manufacturers save costs for users, but there are great security risks. The insulation layer without radiation crosslinking has poor heat resistance and aging resistance, and it is easy to leak electricity and short circuit after a long time, which destroys the performance of PTC core tape and greatly shortens the service life of electric heating tape. Anhui Huanrui electric heating belt introduced by our company is radiation crosslinked and has good heat resistance and aging resistance. In the process of use, it not only prolongs the service life of the electric heating belt, but also improves its safety. So, how to distinguish the irradiation degree of electric heating belt? First of all, we can observe the general situation from the softness of the electric heating belt. The electric heating belt radiated by the whole body is relatively soft, and only the electric heating belt radiated by the core belt has poor flexibility and is not easy to bend. Secondly, it can also be distinguished by the spraying code of the electric heating belt. Due to the irradiation of high-energy electron beam, the color of the fully irradiated electric heating belt is dark, while the color of the cable with non-irradiated insulation layer is bright. In addition, the insulation layer of total radiation electric heating belt can even twitch back and forth. At the same time, when the electric heating belt is electrified and heated, the non-irradiated insulation layer shrinks greatly, and the semiconductor PTC core belt is exposed due to the shrinkage of the insulation layer, which is easy to leak electricity and short circuit, which has great security risks. Fourthly, the performance of the outer sheath material directly affects the use of the safe self-controlled temperature electric heating belt. Most polyolefin outer sheaths were replaced by plastics in some factories, which led to accidents. However, in the case that the ambient temperature is too low and too high, and in certain workplaces, the fluorine-containing outer sheath of the self-controlled electric heating belt must be used. At present, there are flame-retardant electric heating belts and non-flame-retardant electric heating belts on the market. There is a gap between the prices of the two products, and some manufacturers pretend the latter as the circulation market of the former in order to maximize profits. In a word, customers can distinguish the quality of electric heating belt from the aspects of conductive copper wire, starting current, attenuation rate and radiation processing technology. In addition, it is necessary to audit the engineering performance, qualification and inspection report of the enterprise, and it is best to visit the factory on the spot, which is the most intuitive product identification. In recent years, according to the requirements of the national industrial policy, Anhui Huanrui has been insisting on independent innovation, taking all possible technical measures to vigorously promote the technological progress of enterprises, and has carried out a number of technological innovation activities for several key technologies in the research and development and production of self-controlled electric heating belt products, with the focus on the research and development and testing of key technologies and processes in PTC core belt structure and heating element processing technology. A lot of preparatory work has been done for the project research and development. We have changed the morphology of polymers through processing technology, and made clear the relationship between their structures and properties. On this basis, we designed the synthesis route and processing technology according to the structure, reasonably selected and developed PTC (positive temperature coefficient) semiconductor polymer functional materials, successfully developed low-resistance transition layer self-control temperature electric heating belt, and obtained the following national patent certificates, which solved the problem of large starting current. The technical problems such as high attenuation rate prolong the service life of electric heating belt. Anhui Huanrui Research Institute has won thirteen national patent certificates. Intrinsically safe solar self-controlled electric heating cable patent certificate power plant flue gas desulfurization project electric heating cable patent certificate oil well self-controlled electric heating cable patent certificate single-phase constant power heating cable patent certificate series electric heating cable patent certificate three-phase constant power heating cable patent certificate concrete curing heating cable patent certificate gutter snow melting special heating cable patent certificate environmental protection analysis anti-corrosion sampling heating composite pipe patent certificate mineral insulated heating cable patent certificate Anhui Huanrui Electric Heating Company's important commitment: All products of Huanrui Electric Heating Company are flame retardant series. National100000 life insurance product liability insurance, worry-free after sale!