| 摘要 |
PURPOSE: A PE polyethylene saddle tightening pipe is provided to connect the pipe for retaining length change of the tube contracted according to temperature change of season during keeping suitable tightness and firmness. CONSTITUTION: A connecting device connecting a PE polyethylene saddle tightening pipe is composed of a connecting pipe(12) connected to an end portion of a tightening pipe(10a), a saddle(20) combined around a periphery after matching a connecting pipe(12) of a tightening pipe(10b) adjacent and a packing(30) inside the saddle. Around the periphery, separation preventive grooves(13a,13b) through which a protrusion(24) of the saddle(20) is inserted are defined. Around the connecting pipe, a metal plate(15) is reinforced. Herein, in case of injection of the connecting tube, one end of the metal plate is buried in a body of the connecting pipe and other end is extended along a surface to have the separation preventive groove on the surface. The tightening pipes linked with the connecting pipe are disposed at a regular interval depending on expansion and contraction changed with temperature to combine the saddle(20) around. The protrusion(24) is inserted to the separation preventive grooves formed on the connecting pipe and fixed to a flange(25) using a bolt(26).
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