JPH0285092U

JPH0285092U -

Info

Publication number: JPH0285092U
Application number: JP16558888U
Authority: JP
Priority date: 1988-12-20
Filing date: 1988-12-20
Publication date: 1990-07-03

Description

[Brief explanation of drawings]

第１図はこの考案にかかる管部材接続構造に使
用される形状記憶合金製のストツプリングの斜視
図である。第２図および第３図は形状記憶合金製
ストツプリングを第２の管部材の外周面上に固着
するための操作を示した図である。第４図は、こ
の考案の実施例を示す断面図であり、接続途中の
状態を示している。第５図は、第４図に示す実施
例の接続完了部の状態を示す断面図である。第６
図は、この考案の他の実施例の断面図である。第
７図はこの考案のさらに他の実施例の断面図であ
る。第８図はこの考案のさらに他の実施例の拡大
図である。第９図は、従来の管部材接続構造の概
略図である。図において、１は第２の管部材、２は第１の管
部材、３は第２の管部材の接続部、３ａはねじ部
、４は第１の管部材の接続部、５は袋ナツト、５
ａはねじ部、５ｂはフランジ、６は形状記憶合金
製ストツプリング、７はリング状パツキンである
。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 perspective view of a shape memory alloy stop ring used in the tube member connection structure according to this invention. FIGS. 2 and 3 are views showing the operation for fixing the shape memory alloy stop ring onto the outer peripheral surface of the second tube member. FIG. 4 is a sectional view showing an embodiment of this invention, showing a state in the middle of connection. FIG. 5 is a sectional view showing the state of the connection completed portion of the embodiment shown in FIG. 4. 6th
The figure is a sectional view of another embodiment of this invention. FIG. 7 is a sectional view of still another embodiment of this invention. FIG. 8 is an enlarged view of still another embodiment of this invention. FIG. 9 is a schematic diagram of a conventional tube member connection structure. In the figure, 1 is the second pipe member, 2 is the first pipe member, 3 is the connection part of the second pipe member, 3a is the threaded part, 4 is the connection part of the first pipe member, and 5 is the cap nut. ,5
5b is a flange, 6 is a shape memory alloy stop ring, and 7 is a ring-shaped packing. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] A connection structure for connecting a first pipe member and a second pipe member, comprising: a connecting part of the first pipe member; and an outer diameter of the connecting part of the first pipe member. a connecting portion of a second tube member, which has a larger inner diameter than that of the first tube member, has a threaded portion formed on its outer peripheral portion, and into which the connecting portion of the first tube member is inserted; and a connecting portion of the first tube member. and the connecting portion of the second tube member, the end portion on the first tube member side has an inward flange, and the inner peripheral portion on the second tube member side has an inward flange. a cap nut formed with a threaded portion that engages with the threaded portion of the connection portion of the second pipe member; and a cap nut made of a shape memory alloy, which has a shape memory effect that causes the cap nut to form a shape on the outer circumferential surface of the first pipe member. is fixed to,
a stop ring disposed inside the cap nut so as to be sandwiched between the inner wall surface of the cap nut and the end surface of the connecting portion of the second pipe member; and a stop ring adjacent to the stop ring on the second pipe member side of the stop ring. a ring-shaped packing provided between the outer circumferential surface of the connecting portion of the first tube member and the inner circumferential surface of the connecting portion of the second tube member; As the second tube member is screwed into the threaded portion of the connecting portion, the inner wall surface of the cap nut comes into contact with the stop ring, and the stop ring moves together with the first tube member,
The ring-shaped packing is pressed against the second pipe member side, compressed, and swells in the radial direction, so that the ring-shaped packing covers the outer circumferential surface of the connecting portion of the first pipe member and the second pipe member. A connection structure between pipe members that is tightly attached to the inner peripheral surface of the connection part.