LINING OF INNER SURFACE OF TUBE

• Main Authors: TSUKIMOTO FUMIO, ROKUHARA TETSUO, TSUJI TOSHINORI, OKUBO KATSUYUKI, ASHIDA TATSUYA
• Format: Patent
• Language: English
• Published: 30.01.1989
• Subjects: APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

PURPOSE:To enable a coil spring-shaped wire to be introduced into a bend easily and securely by providing the wire material with a specific cross section which forms the wire and passing a two-layered tube of a specific quality through the coil. CONSTITUTION:The cross section shape of a wire material which forms coil spring-shaped wire 3 caused to rotate in a reverse direction when the wire is introduced into pipe 2 and pulled out of the latter is such that the secondary cross-section moment to the external bending force applied to a diametral direction of the wire 3 is larger than the secondary cross-section moment to the external bending force applied to the longitudinal direction of the wire 3. The tube 7 for supplying lining material 12 which passes through the wire 3 consists of an inner layer 7a of a material having a hardness of JIS(A)HS 80 deg. or less and a braid 7b of a material having an elongation percentage of 10% or higher for the formation of a two-layered structure. Consequently, it is possible to introduce the wire 3 through which the tube 7 passes, into the pipe 2 easily and securely regardless of the existence of numerous sharp bends.