JPH02105695U

JPH02105695U -

Info

Publication number: JPH02105695U
Application number: JP1380790U
Authority: JP
Priority date: 1990-02-16
Filing date: 1990-02-16
Publication date: 1990-08-22
Also published as: JPH0326385Y2

Description

[Brief explanation of drawings]

第１図はこの考案に係る流体膨張式プラグの縦
断面図、第２図はこの考案に係る流体膨張式プラ
グに用いる弾性高分子物質製の管状スリーブの部
分断面図である。１０……流体膨張式プラグ、１２……心棒、１
３……中空管、１４……管状スリーブ、１５……
コード（補強材）、１６……外側湾曲表面、１７
……心棒外径、１８……第２の端部分、１９……
第１の端部分、２０……ループ部分、２２……ク
ランプ手段（クランプリング）、２４……環状溝
（第１および第２の係合位置）、２６……チユー
ブ、２７……ポート、２９……第１の端壁、３０
……第２の端壁、３１……ニツプル、３２……オ
リフイス、３４……ニツプル、３８……内径、３
９，４０……層。 FIG. 1 is a longitudinal cross-sectional view of a fluid-expandable plug according to this invention, and FIG. 2 is a partial cross-sectional view of a tubular sleeve made of an elastic polymer material used in the fluid-expandable plug according to this invention. 10...Fluid expandable plug, 12...Mandrel, 1
3...Hollow tube, 14...Tubular sleeve, 15...
Cord (reinforcing material), 16...Outer curved surface, 17
...Mandrel outer diameter, 18...Second end portion, 19...
First end portion, 20... Loop portion, 22... Clamping means (clamp ring), 24... Annular groove (first and second engagement positions), 26... Tube, 27... Port, 29 ...first end wall, 30
... Second end wall, 31 ... Nipple, 32 ... Orifice, 34 ... Nipple, 38 ... Inner diameter, 3
9, 40...layers.

Claims

[Claims for Utility Model Registration] 1. (a) a rigid cylindrical mandrel; (b) disposed about an outer curved surface of the mandrel;
Reinforced over the entire longitudinal length with a reinforcement comprising a layer consisting of an array of cords with helical windings in a constant direction and a layer consisting of an array of cords with helical windings in the opposite direction to said direction. , a tubular sleeve made of an elastic polymeric material with one end folded back to form a loop portion; (c) clamping means for tightly holding both ends of the tubular sleeve to the outer curved surface of the mandrel; (d) a tubular sleeve; a fluid-expandable plug for use within a cylindrical conduit comprising means for introducing or discharging a pressure fluid between the outer curved surface of the mandrel and the outer curved surface of the mandrel; 2. The fluid-expandable plug according to claim 1, wherein the mandrel is a hollow tube having a fluid-tight end wall at least at one end thereof. 3. Utility Model Registration Claim 1 or 2 further comprising a flow path through the fluid-expandable plug independent of means for introducing or discharging pressure fluid between the tubular sleeve and the outer curved surface of the mandrel. Fluid-expandable plug as described in section. 4. The mandrel has longitudinally spaced annular grooves on its outer curved surface, each end portion of the tubular sleeve being pushed into said annular groove and held by ring-shaped clamping means disposed on the annular groove. A fluid expandable plug according to claim 1 or 2, which is a registered utility model. 5 The free diameter of the tubular sleeve is smaller than the diameter of the mandrel Claim 1 or 2
Fluid-expandable plug as described in section. 6. In a fluid-expandable plug for a conduit, a rigid, generally cylindrical mandrel 12 having an outer curved surface 16 defining the diameter of the mandrel and an interior chamber;
a mandrel having a fluid passageway in communication with the chamber; and a first end molecule 19 of a resilient polymeric material located on the mandrel, the tubular sleeve providing a fluid seal. a layer comprising an array of cords expandable into engagement with said conduit and further disposed around the outer curved surface of the mandrel and having a helical winding in a constant direction over its longitudinal length; , a layer consisting of an array of cords having helical windings in the opposite direction to said direction.
5 and further has a free diameter in an uninflated state that is smaller than the diameter of the mandrel, whereby the tubular sleeve facilitates insertion of the fluid-expandable plug into the conduit. a tubular sleeve 14 that tightly fits over said mandrel in an uninflated state; and first and second circumferential engagement positions 24,2.
4, the tubular sleeve 14 is attached to the mandrel 1.
2, wherein one end of the fluid passageway is between the first and second engagement positions 24, 24, and the first end of the tubular sleeve is A portion 19 extends into a first circumferential engagement position 24 and is folded into the tubular sleeve to form a looped loop portion 20 in the tubular sleeve, the loop portion 20 comprising: Port 2 of the fluid flow path
7 and extending longitudinally outwardly of the tubular sleeve substantially beyond said first circumferential engagement location 24 to substantially increase the longitudinal size and amount of expansion of said tubular sleeve. clamping means; between the tubular sleeve 14 and the mandrel 12;
and means for introducing or discharging a pressurized fluid through the fluid flow path. 7 said outer surface 16 of said rigid generally cylindrical mandrel 12 defines first and second circumferential annular grooves at said first and second circumferential engagement locations 24, 24, respectively; and the clamping means 22
7. The fluid-expandable plug according to claim 6, further comprising a pair of ring-shaped clamping means adapted to engage said first and second circumferential annular grooves.