RUBBER RING USED FOR PIPE CONNECTION, PIPE HAVING ADAPTER, AND PIPE COUPLING INCLUDING RUBBER RING AND PIPE

摘要

PURPOSE: A rubber ring used for pipe connection, a pipe having an adapter, and a pipe coupling including the rubber ring and the pipe are provided to easily adjust the length of a duct, to make assembling convenient, to prevent the leakage of water, to avoid the reduction of loading due to the thickness of an adapter, and to suppress the deformation of a joint. CONSTITUTION: A rubber ring(30) installed in the pipe connecting part of a double-walled pipe to prevent the leakage of water has a press protrusion(31) protruded on the inner or outer face. The double-walled pipe has an adapter(20) including more than one rubber ring grooves(21) on the inner face and a fixing protrusion(23) on the outer face end portion. A pipe coupling is composed of the adapter, the rubber ring and a flange(40) having a press pipe unit(41) of which inner face is adhered to the outer face of the double-walled pipe and a fixing protrusion(42) fixed with the fixing protrusion of the adapter.