Beijing Jianke Huifeng Technology Co., Ltd. was founded in 1992. It is a scientific and technological manufacturer specializing in high-pressure sealing materials and sealing products. It has a complete product development, quality control and production and sales system. The products have won many national patents. And passed the ISO9001:2008 quality management system certification. Since 2012, the company has concentrated professional and technical personnel engaged in the research and development and production of the main drive seal of the shield machine, and obtained the patent of the main drive seal ring of the shield machine, which is the first domestic initiative. The company is a member of the China Construction Machinery Industry Association Tunneling Machinery Branch, a member of the Beijing Shield Engineering Association, and a part of the technology and productivity conversion base of some universities in Beijing.

In 2013, the first set of domestically-made shield machine main drive seal was successfully developed and applied to the shield equipment of China Coal No. 3 Construction Tianjin Co., Ltd., which has advanced 4.0 kilometers in two years. The product performance is stable, the quality is reliable, and its service life reaches The advanced level of similar products abroad. The shield seals produced by our company have been successively applied in tunnel projects in major cities across the country (such as Beijing, Wuhan, Hefei, Shenyang and other cities), which can fully meet the requirements of various complex geological conditions on site and have good results. .