One, Introduction: pipeline quick coupler is a new type of pipe connector., which USES the pressure and the self-tightening sealing ring force produced by medium, to seal medium. Applicable to electric power, mining, chemical industry, environmental protection, petroleum and other departments of the ground or underground water supply and drainage, dust, mud, etc liquid. The product has small volume, light weight, simple structure, each joint is only 2-4 (except for large diameter) bolt, easy installation and maintenance, the installation can be selected at random when the operation is easy to operate, improve the work efficiency of 5 to 8 times compared with flange, not only reduce the intensity of the installation, and provides exact guarantee to extend the life of the pipeline, so it is also called quick connectors; For flexible connection between the two connection pipe, any deviation to allow 3-5 degrees, on the ground of the UPS and downs, slightly bent or line of roadway, can bend without having to draw another Angle, due to the gap between the two tubes, can compensate for steel pipe scale, line can cancel all the telescopic compensator, lower the engineering cost; Flexible sealing ring has since the tight sealing function, it is contrary to the traditional flange, medium pressure is higher, the better sealing performance, and impact resistance, resistance to vibration, to ensure the sealing reliability. Due to the product with the advantages of the above, has now been electric power, coal, metallurgy, chemical industry, environmental protection, municipal, railway highway tunnel construction and design departments have value and use.