The upgrading of equipment not only satisfies the design parameters of the product, can adapt to different operation environment, and ensure high reliability in the life cycle. Users such as the national Power Grid Corp pay more and more attention to the quality of products. The bidding of differentiated Power Grid Corp of the national Power Grid Corp clearly requires that the products purchased can run steadily for 30 years. Zhang Lixin believes that to achieve this standard, products must have high reliability. To ensure the reliability of the product, the whole process of product production and systematic quality control should be realized, including the inspection and control of raw materials into the factory, the control of the process of production equipment, the inspection and control of the purchase of spare parts to the factory and the quality control of the product. Among them, the realization of specialized production of leading products is an important means of product quality control.

Therefore, the overall quality of products can not be simply generalized. It will eventually be achieved through the improvement of components, especially the quality of core components. It consists of several key components. The two key elements that constitute the reliability of the switch equipment are the mechanical and electrical properties of the switching equipment. The key to the mechanical performance is the operating mechanism. The key to the influence of the electrical performance of the environmentally friendly switching equipment is the sealing and insulation design of the sealed switch unit and the insulation design. Manufacturing process control.

The gas box part looks very simple. In fact, the technology is very high and the manufacturing process is extremely complicated. First of all, the stainless steel material is easy to deform in the process of welding and welding. If the design or abrasive tool is unreasonable, the size accuracy of the box will be very poor.  Secondly, the gas box should be filled with gas, which requires the opening of the stainless steel surface and the plate cutting to a certain precision. If the precision is not enough, the gas box will leak in the process of use. In order to achieve strict quality control, it is necessary to select high-quality sheet metal materials to achieve the quality control of gas box parts.

Upgrading is the most direct and effective way to upgrade the equipment. The solid insulated ring net cabinet is developed earlier after the SF6 gas insulated ring network cabinet, and has the green and environmental protection ring net cabinet, which occupies the share of the current ring network cabinet Market 10~15%. Through the domestic and foreign market demand, technology research and development dynamics, product cost, product application effect and other comprehensive appraisal enterprises have gradually abandoned the further research and development of the solid cabinet.

Because an international electrical giant has improved the cost of raw materials such as epoxy resin, the cost of the trial product is 3 times that of the SF6 gas insulated ring cabinet. This is enough to explain the poor economy of the product. From the upsurge of research and development to the rapid decline of the market, the solid cabinet has taken about 4 years. This is mainly because the product still has many problems in the actual operation. Therefore, some domestic experts believe that solid cabinet is only a transitional product and can not serve as a long-term technological direction. The newly developed dry air technology has innovatively realized the environmental protection function of the ring net cabinet. In addition, nitrogen insulated ring cabinet is also one of the environmentally friendly products developed recently.

The insulation performance of dry air is better than that of nitrogen. The industry generally recognized that under the same gas pressure, the insulation performance of nitrogen is only 70% of that of air. Secondly, the dry air cabinet adopts the circuit breaker to replace the combination of the solid cabinet, thus realizing the comprehensive cost saving and increasing the reliability of the product. The environmental gas cabinet will become one of the mainstream products in the future environmental protection market. The initial cost of the product is lower than that of the solid insulation cabinet. It is believed that with the mature of the environmental gas cabinet technology, it will develop rapidly.