发明名称 |
DUCTILE CAST IRON PIPE FOR JACKING METHOD |
摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a corrosionproof layer from being broken by transmission of propulsive force and simplify structure of a ductile cast iron pipe for a jacking method. SOLUTION: A flange 3 is provided at a rear end 2A of a spigot 2 of a normal ductile pipe 1 with one end formed as the spigot 2 and with the other end formed as a socket 7 for receiving the spigot 2. Axial ribs 10...10 are laid every appropriate space in the circumferential direction between the flange 3 and a rear face 7C of the socket 7, and an outer surface mortar layer 6 is provided between the rear face 7C of the socket 7 and the flange 3 in such a state as to embed the axial ribs 10...10.</p> |
申请公布号 |
JPH11182745(A) |
申请公布日期 |
1999.07.06 |
申请号 |
JP19970345635 |
申请日期 |
1997.12.16 |
申请人 |
KUBOTA CORP |
发明人 |
NINOMIYA HAJIME;HORIE TAKASHI |
分类号 |
F16L1/024;F16L9/02;F16L58/02;(IPC1-7):F16L9/02 |
主分类号 |
F16L1/024 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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