WO2004085904A1 - Bride d'attache pour tuyaux - Google Patents

Bride d'attache pour tuyaux Download PDF

Info

Publication number
WO2004085904A1
WO2004085904A1 PCT/EP2004/003324 EP2004003324W WO2004085904A1 WO 2004085904 A1 WO2004085904 A1 WO 2004085904A1 EP 2004003324 W EP2004003324 W EP 2004003324W WO 2004085904 A1 WO2004085904 A1 WO 2004085904A1
Authority
WO
WIPO (PCT)
Prior art keywords
end part
pipe clamp
pipe
clamp according
clamp band
Prior art date
Application number
PCT/EP2004/003324
Other languages
German (de)
English (en)
Inventor
Siegried Witiska
Ralf Reichel
Original Assignee
Aba Of Sweden Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aba Of Sweden Ab filed Critical Aba Of Sweden Ab
Publication of WO2004085904A1 publication Critical patent/WO2004085904A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/02—Hose-clips
    • F16L33/04—Hose-clips tightened by tangentially-arranged threaded pin and nut

Definitions

  • the invention relates to a pipe clamp for attaching hoses to pipe pieces with an annular clamp band which encloses an insert ring which has at least two inwardly directed beads.
  • Clamps are used for the fluid-tight connection of hose lines to pipe sockets, whereby the fluid can be a liquid or a gas. If pipes or hoses of different diameters that can be plugged into one another are to be connected to one another, it is generally sufficient to pull a pipe clamp over the hose and to exert pressure by tightening the pipe clamps. This is particularly effective when the outer tube has a softer material than the inner tube and can thus act as a seal.
  • it has been shown that such simple sleeve-like union pipe clamps do not always provide a reliable seal. It is therefore the object of the present invention to provide an improved pipe clamp which can achieve a closer closure of the two interconnected lines. This object is achieved according to the invention by providing a pipe clamp according to independent claim 1.
  • the invention is based on the idea of applying the principle of the O-ring seal to pipe clamps which can also be used, for example, at high temperatures and in special pipe clamps which are not suitable for conventional O-rings. Since the pressure to be applied with O-ring seals is more critical than with conventional seals with simple pipe clamps, the new type of pipe clamp can also have a special mechanism for tension adjustment.
  • the invention is therefore directed to a pipe clamp for fastening hose ends to pipe pieces, which comprises the following elements: an annular clamp band, a first end part protruding from the clamp band and having a first holder; and wherein a second end part protrudes from the clamp band and has a second holder; an insert ring which is enclosed by the clamp band and which has at least two inwardly directed beads; a clamping element interacting with the first holder and the second holder for holding the pipe clamp together; and a tensioning device for holding the end parts in a predetermined position relative to one another.
  • the at least two beads serve to press in a hose end at two annular, parallel areas, whereby an annular protrusion extending into the space between the beads is formed between the pressed-in parallel areas, which has an O-ring-like effect, when a pipe clamp is mounted on a tube end improved sealing achieved.
  • a piece of pipe or a hose end is to be understood here as an elongated hollow object equipped with an inner lumen, which can serve for the passage of a fluid, a hose being made of a flexible material, while the pipe piece is made of a rigid material ..
  • An important element of the invention is also the tensioning device, since it can hold the pipe clamp in a ready-to-transport state without the insert ring slipping or sliding out as an insert within the clamp band. This problem does not occur with conventional pipe clamps that only consist of one clamp band. However, with an opening clamp band or a clamp band that would be delivered with a diameter that is required for assembly, the insert ring would slip with a high probability during storage / transport and the pipe clamp would therefore no longer be operational during assembly.
  • the end parts are held to one another by the tensioning device in such a way that the circumference of the pipe clamp remains limited and the clamp band can thus fix the insert ring securely in its interior.
  • the clamping element has a substantially cylindrical region between a holding end and an abutment at the other end, the first holder has a holding device into which the holding end engages, and the second holder has a through opening through which the cylindrical one Area is passed.
  • the clamping element is a clamping screw with a thread at its holding end (5b) and a screw head as an abutment (5a), and that the holding device is a threaded hole into which the thread of the clamping screw is screwed.
  • the tensioning element is fastened to the holding device by means of a bayonet connection, a pawl mechanism or by means of barbs.
  • the pipe clamp preferably also has a compression spring which acts between the second end part and the tensioning element and can be tensioned by the tensioning element and which has a greater spring force than the tensioning device.
  • the compression spring is preferably a helical compression spring which is arranged between the second end part and the abutment on the cylindrical region of the tensioning element.
  • a compression spring also referred to as a coil spring, a space-saving, compact design is possible, which also exerts particularly uniform pressure on the abutment of the tensioning element or the second end part.
  • the tensioning device is also preferably a helical tension spring which is drawn onto the tensioning element between the second end part and the abutment.
  • a helical compression spring which is drawn onto the tensioning element between the second end part and the abutment.
  • the tension spring being arranged between the second end part and the flange above or below the compression spring on the tensioning element and longer than the compression spring is.
  • the shortness of the compression spring ensures that only the tension spring comes into effect when it is delivered or when the tensioning state is otherwise desired and is the only one that has a closing effect on the pipe clamp.
  • compression spring and tensioning device in a helical compression spring, for example by designing it to be progressive or simply dimensioning its length (which requires a corresponding length for the screw) so that it has both the function of generating a Preload as well as a final fastening tension can cause.
  • the pipe clamp can be opened further against the spring action of the tensioning device by applying pressure to the second end part and the abutment of the Clamping element is exercised in the opposite direction.
  • the second end part is often small and therefore difficult to grasp by tools or hands.
  • the pipe clamp according to the invention preferably further has an opening clip placed between the first and second end parts on the tensioning element.
  • the opening clip which can be a plastic or metal plate, for example, typically has a widened surface in relation to the second end part and is therefore easier to grip with appropriate tools or by hand if the pipe clamp according to the invention is opened during assembly ,
  • the opening clip can be provided with a corresponding recess with which it can be pushed onto the screw; It preferably has a bore with which it is drawn onto the tensioning element, since it cannot fall down in this way.
  • the opening clip must be designed so that it can come to rest on the second end part and can exert pressure on it.
  • the pipe clamp according to the invention has a spacer sleeve of a predetermined length, which is guided through the through opening in the second end part, as a limit stop for the clamping element and the first end part.
  • At least one marking can be provided on the tensioning element, which corresponds to a specific closing force of the pipe clamp.
  • the spacer sleeve is preferably pressed into the opening clip at one end, so that the opening clip, with its wider contact surface, limits the stop at the first end part.
  • Solutions are known to the person skilled in the art of how he can carry out the first end part with a screw bore or another holding device.
  • This first end part preferably comprises an angled end region of the clamp band and a square nut which at least partially surrounds the clamp band end in order to hold it.
  • This variant is also simple to manufacture and allows a high force absorption on the first end part by the nut used. Alternatively, it is also conceivable to weld the square nut onto the end of the clamp band.
  • the second end part preferably likewise comprises an angled end region of the clamp band, the angled end region being able to have a U-shaped profile when viewed from the side, that is to say it is folded back on itself. After the U-shaped bend, the clamp band can also be guided further and under the clamp band at the area of the other end part.
  • This end region of the clamp band is therefore preferably designed such that it can slide easily under the other end region of the clamp band, for example by sharpening or bending the ends.
  • the profiled insert ring is advantageously made of a material whose properties match the material of the hose ends that are to be fastened with the pipe clamp according to the invention.
  • Usable materials are, for example, copper, aluminum or certain polymers.
  • the insert ring consists of cold-rolled stainless steel, since it is particularly resistant to temperature and chemicals.
  • the insert ring is preferably shaped at its end regions in such a way that these end regions can slide easily over one another, similar to the end region of the clamp band.
  • the pipe clamp according to the invention can also be used to clamp diameters which correspond to circumferences which are smaller than the length of the clamp band and / or insert ring.
  • lateral edges are preferably also incorporated on the insert ring, which partially engage around the clamp band when inserting the insert ring into the inner region of the clamp band and thus lock the insert ring laterally.
  • Fig. 1 shows a clamp band according to the invention in the tensioned state, i.e. after attachment to a pipe connection (not shown);
  • FIG. 2 shows the pipe clamp from FIG. 1 in a pretensioned delivery state with an installed assembly tool
  • Fig. 3 shows in cross section the fastening mechanism of the pipe clamp in
  • Fig. 4 shows a pipe clamp in the open, i.e. ready for installation
  • Fig. 5 shows the arrangement of the elements of the locking mechanism of the pipe clamp in the open state
  • Fig. 6 shows in cross section the locking mechanism of the pipe clamp in the tensioned, i.e. Fig. 1 corresponding state;
  • Fig. 7 shows in cross section the insert ring and the pipe clamp to show their profiles.
  • the first end part 3 consists of a bent area of the clamp band and a square nut 7 which is gripped by the clamp band in area 3a.
  • the second end part 4 consists of a first region 4a bent orthogonally from the clamp band and a second region 4b bent back thereon in a U-shape.
  • the clamp band can end at the end of area 4b or open again by means of a further 90 ° bend Height of the main clamp band 1 and be guided under the other end region of the clamp band.
  • the clamping screw 5 is passed through an opening in the second end part 4 and screwed into the threaded opening of the square nut 7 by means of a threaded area or another embodiment of the holding end 5a.
  • the compression spring 6 is completely or practically completely compressed and in this way exerts a defined force between the abutment 5b of the screw, which in this case is the screw head, and the second end part 4, the force exerted on the screw head 5b Screw 5 is passed on to square nut 7 and thus to the first end part 3, so that the two end parts are pulled towards one another and the pipe clamp according to the invention thus remains in a closed state.
  • the pressure acting on the insert ring 1 can be determined very precisely and thus in the optimal range without further adjustment by a mechanic.
  • the insert ring 1 has end regions 1c which overlap one another and, in the present embodiment, are arranged opposite the end regions of the clamp band. These are preferably designed so that the end regions can slide easily over one another.
  • the pipe clamp according to this embodiment of the invention also has an opening clip 8 which is pushed over the clamping screw 5 and which is wider than the two end parts and the clamp band and which can be gripped by an assembly hand in order to be able to open the pipe clamp according to the invention.
  • Fig. 2 shows the pipe clamp of Fig. 1 in a delivery state.
  • the clamping screw 5 is only screwed into the square nut 7 with a few turns, but not screwed through. This means that no force is exerted on the compression spring 5, so that the tension spring 9 is the only one that causes the pipe clamp to contract slightly in the same manner of operation as the compression spring 5.
  • An assembly tool 10 or the hand of a fitter can grip the pipe clamp at the end of the screw 5 and at the first end part 3 or the opening clip 8.
  • a holding finger 10a for the tensioning screw 5 and two holding fingers 10b serve for gripping the opening clip 8 on both sides.
  • Fig. 3 shows in cross section the locking mechanism of the pipe clamp in the delivery state of Fig. 2.
  • the longer tension spring 9 presses against the sleeve 5b of the clamping screw 5 and against the second end part 4, so that a slight tension is given to the pipe clamp. In this state, the compression spring 6 can either slide back and forth over the screw or is attached to the screw head 5b and thus cannot be moved.
  • a spacer sleeve 11 is provided in this embodiment of the invention, which is pressed into the opening clip 8 and which, guided through the second end part, surrounds the tensioning element 5.
  • Fig. 4 shows the pipe clamp in the open state.
  • the holding tool 10 or the hand of a mechanic is closed, so that against the resistance of the tension spring
  • the clamping screw 5 is pushed through the second end part and thus presses the first end part 3, into which the clamping screw 5 is screwed with the threaded region 5a, away from the second end part 4.
  • the other holding fingers 10b hold the opening clip 8 as an abutment.
  • Fig. 5 shows in cross section the locking mechanism of the pipe clamp in the open state - of Fig. 4.
  • the screw 5 is pushed through the second end part 4, so that the first end part 3 in this enlarged view is pushed to the left of the picture .
  • the compression spring 6 can be used, for example, as a limiting element of this opening movement by the closing force of the holding tool
  • Fig. 6 shows in cross section the locking mechanism of the pipe clamp in the tensioned state of Fig. 1.
  • the elements By screwing the clamping screw 5 into the square nut 7, the elements are pushed together until the opening clip 8 strikes the first end part 3 and connects it to the opening clip Sleeve 1 1 abuts the flange 5b of the clamping screw 5 at its other end.
  • the maximum closing state of the pipe clamp according to the invention is hereby achieved, since the sleeve 11 works as a limit stop.
  • the compression spring 6 is practically completely assembled in the illustration shown. therefore presses and exerts its maximum spring force.
  • the insert ring 1 has two beads 1a at the edges, which can achieve an O-ring-like sealing defect between them.
  • edges 1b are provided at the outer ends of the beads 1a and into these, which come to lie to the side of the clamp band 2 and can prevent the profiled insert ring from slipping sideways, at least in the prestressed state of the pipe clamp.
  • the pipe clamp according to the invention provides an O-ring-like seal for a pipe connection, with slipping of the insert ring being ensured by preloading and optimal sealing by a predefined final tension with one or two clamping systems.
  • the pipe clamp according to the invention is simple to manufacture and assemble.

Abstract

La présente invention concerne une bride d'attache pour tuyaux conçue pour fixer des extrémités de tuyau sur des pièces tubulaires. Cette bride d'attache comprend une bande de bride d'attache (2) courbée en forme d'anneau, une bague d'insertion (1) qui est entourée par la bande de bride d'attache (2) et qui présente au moins deux renflements (1a) orientés vers l'intérieur, pouvant venir respectivement en contact avec les pièces tubulaires à raccorder, une première partie d'extrémité (3) qui est en saillie depuis la bande de bride d'attache (2) et qui présente un alésage fileté situé de manière tangentielle à la bande de bride d'attache (2), une seconde partie d'extrémité (4) qui est en saillie depuis la bande de bride d'attache (2) et qui présente une ouverture située de manière tangentielle à la bande de bride d'attache (2), une vis de serrage (5) qui passe à travers l'ouverture dans la seconde partie d'extrémité (4), qui est vissée avec une extrémité (5a) dans l'alésage fileté dans la première partie d'extrémité (3) et qui présente un rebord (5b) à son autre extrémité, ainsi qu'un dispositif de prétension (9) qui est conçu pour serrer les parties d'extrémité (3, 4).
PCT/EP2004/003324 2003-03-27 2004-03-29 Bride d'attache pour tuyaux WO2004085904A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20305044.4 2003-03-27
DE20305044U DE20305044U1 (de) 2003-03-27 2003-03-27 Rohrschelle

Publications (1)

Publication Number Publication Date
WO2004085904A1 true WO2004085904A1 (fr) 2004-10-07

Family

ID=7981186

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/003324 WO2004085904A1 (fr) 2003-03-27 2004-03-29 Bride d'attache pour tuyaux

Country Status (2)

Country Link
DE (1) DE20305044U1 (fr)
WO (1) WO2004085904A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9032592B2 (en) 2009-04-14 2015-05-19 Voss Industries, Inc. Band clamp

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1383134A (en) * 1920-04-12 1921-06-28 Hugo J Walter Hose-clamp
DE1775485B1 (de) * 1968-08-17 1971-02-25 Wolfgang Henning Spannschelle
FR2515277A1 (fr) * 1981-10-16 1983-04-29 Leinhaas Werner Collier a bande large muni de deux machoires de serrage pour le raccordement axial de deux corps tubulaires adjacents par leur cote frontal
DE4115968A1 (de) * 1990-05-18 1991-11-21 Hannu Kerko Anordnung zur befestigung eines schlauches an einer huelse
EP0523600A2 (fr) * 1991-07-15 1993-01-20 Hans Oetiker AG Maschinen- und Apparatefabrik Collier de serrage ajustable
US5411162A (en) * 1992-07-31 1995-05-02 Allen-Bradley Company, Inc. V-band coupling for an explosion-proof enclosure
WO2001027516A1 (fr) * 1999-10-14 2001-04-19 Mikalor S.A. Collier a vis de serrage amelioree

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1383134A (en) * 1920-04-12 1921-06-28 Hugo J Walter Hose-clamp
DE1775485B1 (de) * 1968-08-17 1971-02-25 Wolfgang Henning Spannschelle
FR2515277A1 (fr) * 1981-10-16 1983-04-29 Leinhaas Werner Collier a bande large muni de deux machoires de serrage pour le raccordement axial de deux corps tubulaires adjacents par leur cote frontal
DE4115968A1 (de) * 1990-05-18 1991-11-21 Hannu Kerko Anordnung zur befestigung eines schlauches an einer huelse
EP0523600A2 (fr) * 1991-07-15 1993-01-20 Hans Oetiker AG Maschinen- und Apparatefabrik Collier de serrage ajustable
US5411162A (en) * 1992-07-31 1995-05-02 Allen-Bradley Company, Inc. V-band coupling for an explosion-proof enclosure
WO2001027516A1 (fr) * 1999-10-14 2001-04-19 Mikalor S.A. Collier a vis de serrage amelioree

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9032592B2 (en) 2009-04-14 2015-05-19 Voss Industries, Inc. Band clamp

Also Published As

Publication number Publication date
DE20305044U1 (de) 2003-05-28

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