Hao Tong Engineering Rubber _qz spherical steel ball bearing steel bearing _ provided by Hao-engineering rubber. We are Hengshui HaoTong Engineering Rubber Co., Ltd. (www.htgcxj.com) located at: Hebei Hengshui specializes in: grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, spherical steel bearings in China since 1960s started to develop, rectangular plate damping rubber bearing steel ball bearings, and has started a trial in Guangdong, Shanghai, Shandong, Guangxi, Fujian, Jiangsu, Zhejiang and Anhui provinces and parts of roads and bridges in 1995 . The country's first trial of laminated rubber bearings in Guangdong Zhaoqing roads and bridges, has been 40 years of history of use of laminated rubber bearings have become widely used in highway and city bridges and culverts, and one of the popular forms an abutment. China's first laminated rubber bearings content will be included in the 1975 issue of "Highway Bridge Design Code" (Trial) in 1980 to amend the "Highway Bridge Design Specifications" Ministry of Transportation Highway Planning and Design Institute commissioned the Shanghai Municipal Engineering Design Institute in conducted on pressure testing machine 200t bulk mechanical properties test of laminated rubber bearings spherical steel, test results into "machine prestressed concrete reinforced concrete highway bridge design specifications" (JTJ023-85) .1988 in traffic does not begin to develop the transportation industry standard " highway bridges laminated rubber bearing specifications series "(JT 3132.1-88), this series of specifications to comply fully with the provisions of JTJ 023-85 of the design. At the same time developed a "highway bridges laminated rubber bearings technical conditions" (JT 3132.3-88) and subsequently have developed a "highway bridges mechanical properties of laminated rubber bearings inspection rules" (JT 3132.3-90), this rectangular laminated rubber bearings design, processing and use of a reliable basis. In traffic without attention and strong support, but also issued a circular experimental studies of laminated rubber bearings and experimental research on complementary rectangular laminated rubber bearing, the Ministry of Transportation Highway Planning and Design Institute has commissioned the Academy of Railway Sciences On the 500t and 2000t pressure testing machine batch round, rectangular and large-scale mechanical testing of laminated rubber bearings bearing materials and adapt according to temperature division (a) normal-type laminated rubber bearing, using chloroprene rubber production , which adapt to the temperature range may not be used in place of natural rubber neoprene, does not allow the incorporation of natural rubber in the chloroprene rubber. (2) cold-type laminated rubber bearings: Should the use of natural rubber (NR) production seismic movable spherical steel bearing, which adapt to a wide range of temperature changes. Fulcrum rebate bridge superstructure is 150 ~ 8000KN bridges, and more generally the use of laminated rubber bearings. Ordinary laminated rubber bearings for smaller and smaller displacement span bridge, a different plane shapes for different bridge span structure, namely orthogonal rectangular bearing bridge, curved bridge, skew bridge pier bridge should use a circular cylinder stand. PTFE slide rubber bearing suitable for large-span steel qz spherical bearings, continuous multi-span bridge, Charpy and continuous plate structures such as large displacement of the beam, it can be used as continuous beams and T-beams Ding push traverse the like used in the slider. Rectangular and circular PTFE slide rubber bearing applications are the same as ordinary rectangular and circular laminated rubber bearing.