JPS63157591U

JPS63157591U -

Info

Publication number: JPS63157591U
Application number: JP4767887U
Authority: JP
Priority date: 1987-04-01
Filing date: 1987-04-01
Publication date: 1988-10-17

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す側面縦断図
、第２図はこの考案の他の実施例を示す本体鋼管
の側面図であり、第２図ａはリブがスパイラル状
に設けられている本体鋼管の側面図、第２図ｂは
リブが管軸方向に複数設けられている本体鋼管の
側面図、第３図は第１図における本体鋼管の継手
処理説明図、第４図は従来の推進用鋼管を示す構
造図であり、第４図ａは側面縦断図、第４図ｂは
正面断面図である。図において、２は被覆管、３は充填材、１０は
本体鋼管、１０ａ，１０ｂ，１０ｃはリブである
。なお、各図中同一符号は同一または相当部分を
示す。 Fig. 1 is a side longitudinal sectional view showing one embodiment of this invention, Fig. 2 is a side view of a main body steel pipe showing another embodiment of this invention, and Fig. 2a shows ribs provided in a spiral shape. Fig. 2b is a side view of the main steel pipe in which a plurality of ribs are provided in the tube axis direction, Fig. 3 is an explanatory diagram of the joint processing of the main steel pipe in Fig. 1, and Fig. 4 is a conventional Fig. 4 is a structural diagram showing a propulsion steel pipe, in which Fig. 4a is a side longitudinal sectional view and Fig. 4b is a front sectional view. In the figure, 2 is a cladding tube, 3 is a filler, 10 is a main steel tube, and 10a, 10b, 10c are ribs. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of Claim for Utility Model Registration] (1) A steel propulsion pipe formed by filling a gap between a double pipe formed by a main steel pipe and a cladding pipe with a filler, in which the main steel pipe is provided with a convex rib. A propulsion steel pipe characterized by: (2) The propulsion steel pipe according to claim 1, wherein the cladding pipe is formed outside the main steel pipe. (3) Utility model registration claim 1, characterized in that the rib is provided on the outer periphery of the main steel pipe.
2. The propulsion steel pipe according to Items 1 and 2. (4) The propulsion steel pipe according to claims 1 to 3, wherein a plurality of the ribs are provided in the circumferential direction of the main steel pipe. (5) The propulsion steel pipe according to any one of claims 1 to 3, wherein the rib is provided in a spiral shape in the circumferential direction of the main steel pipe. (6) The propulsion steel pipe according to any of claims 1 to 3, wherein a plurality of the ribs are provided in the axial direction of the main steel pipe.