Structure of hydraulic cylinder of press tool for press type pipe joint.

Snap fitting In a crimping tool for tightening, Tool and Pipe Fittings A hydraulic Cylinder for generating a pressing force If the hydraulic pressure is to be thereby generating a pressing force exceeding the allowable limits of the mechanical strength of the tool structure, the crimping tool is broken, so that the problem of the risk and economic losses in accidents resulting acting on. However, a hydraulic pump for supplying hydraulic pressure to the crimping tool is actually a pressing tool and is additionally independently sold, it is purchased, the number can not be made to set up to fluid pressure of all the hydraulic pump itself matches the allowable setting the maximum pressure of the pressing tool thus in order to prevent damage of the crimping tool, the safety device which is independent of the delivery pressure of the hydraulic pump, so that hydraulic pressure is always below the maximum allowable working pressure of the mechanical strength within the limit of the tool in the crimping tool is required. The present design of the pressing force generating device of the pressing tool, single acting type (單 動 形) piston formula (PISTON 式) The hydraulic ache To a maximum pressure control of the working-fluid pressure, the relief valve (Relief Valve) device further hydraulic ache The piston ② bayida to design application, the hydraulic structure in the central portion Cylinder piston rod ① snap fitting crimping tool for characterized in that provided in the. Snap fittings, hydraulic Cylinder, crimping tool, the relief valve.