Application and precautions of explosion-proof electronic weighbridge weighing technology
2022-09-16 07:06:53
Application and Precautions of Explosion-proof Electronic Weighbridge Weighing Technology I. Application of explosion-proof electronic weighbridge weighing technology in the industry:
With the development of weighing and measuring technology, weighing systems have been widely used in petroleum, coal, chemical, and pharmaceutical industries. There are many types of flammable and explosive gases in hazardous chemical workplaces in these industries (currently the world) There are about 4,000 kinds of qualitative ones, of which there are more than 1900 kinds of quantitative ones. The process equipments in production, storage and transportation are complex and changeable, and there are many kinds of release sources. It is difficult to analyze and judge the explosion risk factors. Therefore, a comprehensive and correct understanding of electrical explosion-proof safety technology is something that we must pay attention to and take seriously.
1. Considering the energy storage components of the field devices, the field devices in the explosive gas hazardous environment are designed according to the requirements of intrinsic safety and explosion protection, and the corresponding measures for the energy storage components such as inductors and capacitors are taken and made as far as possible. At the same time of reduction, consider the power consumption and temperature rise of the loop components to ensure that the equipment does not generate ignition caused by sparks and heat sources, whether it is in normal operation or fault state. That is, the field device must be an intrinsically safe device.
2. From the perspective of system wiring engineering, the connecting cable becomes an energy storage component due to the distributed capacitance and distributed inductance of the connecting cable. They inevitably store energy during signal transmission. Once the circuit is open or shorted, these stored energy will be released in the form of spark or thermal effects, affecting the intrinsic safety performance of the system. Therefore, it is necessary to ensure that the connection transmission cable is not affected by the external electromagnetic field interference and is mixed with other circuits, and the additional non-intrinsically safe energy brought by the wiring length and the induced electromotive force is limited, thereby determining the allowable distributed capacitance and the allowable distribution of the cable. Inductance, the world's various explosion-proof inspection agencies mainly adopt the method of considering the distribution parameters of cables in a concentrated parameter.
3. Considering the configuration of the control room equipment, the electrical circuit of the part must have the energy of the intrinsically safe equipment that can pass from the non-intrinsically safe circuit of the safe place to the dangerous place, regardless of whether the system is in normal working condition or fault state. The protection function below the limit (zui small ignition energy).
Second, the explosion-proof electronic platform should pay attention to the application:
1. First determine the hazardous medium in use and the area in which it is used. 2. Determine the form, category, grade and temperature group of the explosion-proof electronic scale. 3. Gas explosion-proof and dust explosion-proof are completely different; coal mine explosion-proof and conventional explosion-proof are completely Different 4. Explosion-proof electronic scales must be installed and used in strict accordance with construction specifications.
With the development of weighing and measuring technology, weighing systems have been widely used in petroleum, coal, chemical, and pharmaceutical industries. There are many types of flammable and explosive gases in hazardous chemical workplaces in these industries (currently the world) There are about 4,000 kinds of qualitative ones, of which there are more than 1900 kinds of quantitative ones. The process equipments in production, storage and transportation are complex and changeable, and there are many kinds of release sources. It is difficult to analyze and judge the explosion risk factors. Therefore, a comprehensive and correct understanding of electrical explosion-proof safety technology is something that we must pay attention to and take seriously.
1. Considering the energy storage components of the field devices, the field devices in the explosive gas hazardous environment are designed according to the requirements of intrinsic safety and explosion protection, and the corresponding measures for the energy storage components such as inductors and capacitors are taken and made as far as possible. At the same time of reduction, consider the power consumption and temperature rise of the loop components to ensure that the equipment does not generate ignition caused by sparks and heat sources, whether it is in normal operation or fault state. That is, the field device must be an intrinsically safe device.
2. From the perspective of system wiring engineering, the connecting cable becomes an energy storage component due to the distributed capacitance and distributed inductance of the connecting cable. They inevitably store energy during signal transmission. Once the circuit is open or shorted, these stored energy will be released in the form of spark or thermal effects, affecting the intrinsic safety performance of the system. Therefore, it is necessary to ensure that the connection transmission cable is not affected by the external electromagnetic field interference and is mixed with other circuits, and the additional non-intrinsically safe energy brought by the wiring length and the induced electromotive force is limited, thereby determining the allowable distributed capacitance and the allowable distribution of the cable. Inductance, the world's various explosion-proof inspection agencies mainly adopt the method of considering the distribution parameters of cables in a concentrated parameter.
3. Considering the configuration of the control room equipment, the electrical circuit of the part must have the energy of the intrinsically safe equipment that can pass from the non-intrinsically safe circuit of the safe place to the dangerous place, regardless of whether the system is in normal working condition or fault state. The protection function below the limit (zui small ignition energy).
Second, the explosion-proof electronic platform should pay attention to the application:
1. First determine the hazardous medium in use and the area in which it is used. 2. Determine the form, category, grade and temperature group of the explosion-proof electronic scale. 3. Gas explosion-proof and dust explosion-proof are completely different; coal mine explosion-proof and conventional explosion-proof are completely Different 4. Explosion-proof electronic scales must be installed and used in strict accordance with construction specifications.
Surgical Drapes,Surgical Gowns,Bed Sheets,Non Woven Wrap
Henan Xianghe Medical Materials Co., Ltd. , https://www.xiangheweicai.com