Anticorrosion Technology of Water Ring Vacuum Pump
The main body of the application organization for anticorrosion technology of water ring vacuum pump is enterprise, which mainly includes Nantong Longying Vacuum Pump Industry Co., Ltd., Hubei Tongfang High-tech Pump Industry Co., Ltd., Shanghai Hugang Vacuum Pump Manufacturing Co., Ltd., and related patents of anticorrosion technology of water ring vacuum pump. The title, abstract, legal status and other information are interpreted manually, and 19 key patents are selected after expert review. This section will focus on the interpretation of these patents. Through the analysis of the patent of vacuum pump anti-corrosion technology, the following conclusions can be drawn: 1. Vacuum pump has entered a period of rapid development. Starting in 2007, the number of patent applications for vacuum pumps worldwide began to accelerate. China and Japan are the main acceptance countries of anti-corrosion patents for vacuum pumps in the world, but Chinese patentees have not formed obvious technological competitive advantages.
The patent application and acceptance of vacuum pump anticorrosion technology in China started relatively late, and the vast majority of patents were concentrated after 2003. (3) The patent protection areas of Chinese patentees are relatively limited. Although there are a lot of patents in China, few of them have been applied for protection abroad. (4) According to the patent of anti-corrosion technology of Chinese vacuum pump, anti-corrosion technology mainly aims at Roots vacuum pump, water ring vacuum pump, steam vacuum pump, liquid ring vacuum pump, diaphragm vacuum pump and turbomolecular pump. The anti-corrosion technology mainly includes three kinds: one is to coat a layer of anti-corrosion coating on the surface of vacuum pump; Such as trifluoroethylene anticorrosive coating, Teflon coating, corrosion-resistant oxide or nitriding layer, corrosion-resistant weatherproof paint, etc. Second, the improvement of anticorrosive materials, commonly used coating materials are stainless steel, tin bronze, cemented carbide and other metal materials, natural rubber, phosphorus sheet, artificial rubber, ceramics, plastics and other non-metallic materials. Precision ceramics, organic high analysis or high temperature, corrosion and wear resistant polymer materials, including fluoroplastics, polyethylene, polyvinyl chloride and other new materials; Third, the structure of the pump, such as the upper part of the pump body with a gas chamber, installation of an upper anti-corrosion gas-water separator.
