JPH01106689U

JPH01106689U -

Info

Publication number: JPH01106689U
Application number: JP31288U
Authority: JP
Priority date: 1988-01-07
Filing date: 1988-01-07
Publication date: 1989-07-18
Anticipated expiration: 2003-01-07
Also published as: JPH064153Y2

Description

[Brief explanation of the drawing]

第１図は本考案の薄肉鋼管と継手部との接続構
造の一実施例を示す部分縦断面図、第２図ａ乃至
ｄは本考案で使用する環状パツキンの種々の断面
形状の実施例を示す部分縦断面図、第３図ａ乃至
ｃは本考案で使用する環状保持リングの切断部の
異なる実施例を示す側面図であり、第４図及び第
５図は夫々従来の薄肉鋼管と継手部との接続構造
の例を示す部分縦断面図である。１……薄肉鋼管、２……継手部、３……外周面
、４……環状溝、５……環状保持リング、６……
継手本体、７……内周面、８……拡径円錐面、９
……円筒面、１０……めねじ、１１……環状パツ
キン、１２，１３……環状挾持リング、１４，１
５……縮径円錐面、１６……環状ブツシング、１
８……切断部。 Fig. 1 is a partial longitudinal cross-sectional view showing one embodiment of the connection structure between a thin-walled steel pipe and a joint according to the present invention, and Fig. 2 a to d show examples of various cross-sectional shapes of the annular packing used in the present invention. FIGS. 3a to 3c are side views showing different embodiments of the cut portion of the annular retaining ring used in the present invention, and FIGS. 4 and 5 are partial longitudinal sectional views showing a conventional thin-walled steel pipe and a joint, respectively. FIG. DESCRIPTION OF SYMBOLS 1... Thin-walled steel pipe, 2... Joint part, 3... Outer peripheral surface, 4... Annular groove, 5... Annular retaining ring, 6...
Joint body, 7... Inner peripheral surface, 8... Expanded diameter conical surface, 9
... Cylindrical surface, 10 ... Female thread, 11 ... Annular packing, 12, 13 ... Annular clamping ring, 14, 1
5... Reduced diameter conical surface, 16... Annular bushing, 1
8... Cutting section.

Claims

[Scope of claim for utility model registration] (1) A connection structure between a thin-walled steel pipe such as a thin-walled stainless steel pipe and a joint part such as a pipe fitting or a valve,
An annular groove with a substantially semicircular cross section is provided on the outer circumferential surface of the thin-walled steel pipe, an annular retaining ring with a circular cross section is fitted into the annular groove, and a conical surface with an enlarged diameter from the back is formed on the inner circumferential surface of the joint body of the joint portion. A cylindrical surface and a female thread are sequentially formed, and an annular packing is installed in an annular space having a triangular cross section formed by the enlarged diameter conical surface and the outer circumferential surface of the thin-walled steel tube, and A pair of annular clamping rings that clamp the annular retaining ring are attached to an annular space with a rectangular cross section formed by a surface, and an annular space with a substantially rectangular cross section formed by the female thread and the outer circumferential surface of the thin-walled steel pipe. An annular bushing is screwed into the female thread and externally fitted onto the thin-walled steel pipe, and each of the pair of annular clamping rings has a substantially rectangular cross section, and the opposing sides face toward the inner circumferential surface. A connection structure between a thin-walled steel pipe and a joint portion, in which a pair of opposing diameter-reducing conical surfaces are in contact with and sandwich the annular retaining ring. (2) The connection structure between a thin-walled steel pipe and a joint according to claim 1, wherein the tubular retaining ring is a C-shaped ring having a cut portion at one location on the circumference. (3) The connection structure between a thin-walled steel pipe and a joint according to claim 1, wherein the annular retaining ring is a ring having cut portions at a plurality of locations on the circumference. (4) A connection structure between a thin-walled steel pipe and a joint according to any one of claims 1 to 3, wherein one of the pair of annular clamping rings is formed integrally with the annular bushing. (5) A connection structure between a thin-walled steel pipe and a joint according to any one of claims 1 to 4, wherein the annular packing has a substantially V-shaped cross section opening toward the inner circumference.