WO2012149585A1 - Colliers de serrage - Google Patents

Colliers de serrage Download PDF

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Publication number
WO2012149585A1
WO2012149585A1 PCT/ZA2012/000024 ZA2012000024W WO2012149585A1 WO 2012149585 A1 WO2012149585 A1 WO 2012149585A1 ZA 2012000024 W ZA2012000024 W ZA 2012000024W WO 2012149585 A1 WO2012149585 A1 WO 2012149585A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe clamp
clamping
pipe
pipes
teeth
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/ZA2012/000024
Other languages
English (en)
Inventor
Brian John DUKE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BRIANS TOOL AND DIE AND GENERAL ENGINEERING Pty Ltd
Original Assignee
BRIANS TOOL AND DIE AND GENERAL ENGINEERING Pty Ltd
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 BRIANS TOOL AND DIE AND GENERAL ENGINEERING Pty Ltd filed Critical BRIANS TOOL AND DIE AND GENERAL ENGINEERING Pty Ltd
Publication of WO2012149585A1 publication Critical patent/WO2012149585A1/fr
Anticipated expiration legal-status Critical
Priority to ZA2013/09432A priority Critical patent/ZA201309432B/en
Ceased legal-status Critical Current

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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe ends
    • F16L21/065—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe ends tightened by tangentially-arranged threaded pins
    • 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
    • F16L33/22—Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts
    • F16L33/23—Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts the outer parts being segmented, the segments being pressed against the hose by tangentially arranged members
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/12—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with additional locking means

Definitions

  • This invention relates to pipe clamps.
  • This invention is concerned with a pipe clamp used for joining together two lengths of plastic pipe and more particularly two lengths of large to very large diameter pipes.
  • the invention is concerned with a pipe clamp of the kind for clamping together two lengths of pipe of substantial wall thickness, the pipe clamp comprising a clamping unit arranged to surround the ends of the pipes and an inner member arranged to be inserted into the adjacent ends of the pipes, the clamping unit being formed by a plurality of clamping members and pressurising means adapted to draw the clamping members together to clamp the pipes against the inner member.
  • a pipe clamp of the kind set forth Such a pipe clamp is hereinafter referred to as "a pipe clamp of the kind set forth” .
  • a pipe clamp of the kind set forth comprising at least five clamping members and pressurizing means, preferably comprising nut and bolt sets, between each of the clamping members to draw them together.
  • the inner member preferably has a central peripheral flange which projects beyond the level of the pipes.
  • the clamping members preferably have recesses into which the edge of the flange is received. This arrangement will hold the inner member from moving relative to the clamping unit.
  • the inner member is preferably provided with a pair of teeth located on each side of the flange.
  • the teeth are preferably of a right angle triangular section with the wall closer to the flange being normal to the inner member.
  • the height of the teeth is preferably between 2 mm and 5 mm preferably about 3 mm.
  • the clamping members each comprise a pair of part annular members joined at their ends by radial plates, the inside edges of the annular members serving as clamping feet.
  • the length and/or disposition of the feet is such that they engage the pipe between the radial locations of the teeth.
  • An extension portion extends beyond the outer tooth on each side of the flange to limit the possibility of the pipe bending about the location of the flange.
  • Figure 1 is a side view, partially in section, of an arrangement comprising two pipes connected together by a pipe clamp of the invention
  • Figure 2 is a section on line 2 - 2 of Figure 1 ;
  • Figure 3 is a detail section on line 3 - 3 of Figure 2 with the nut and bolt set omitted for clarity;
  • Figure 4 is a perspective view of a clamping member
  • Figure 5 is an outside view of a sleeve
  • Figure 6 is an end view of the sleeve.
  • a pipe clamp 10 of the invention used for clamping together two heavy-duty water pipes 12 and 14 of an outside diameter of 630 mm and a wall thickness of 46.2 mm.
  • the pipes 12 and 14 comprise high-density polyethylene (HDPE) and are capable of withstanding up to 14 Bar internal pressure.
  • the length of the pipes is nine metres and the mass of each pipe is slightly less than eight hundred kilograms.
  • the pipes 12 and 14 are connected together by a pipe clamp 10 of the invention,
  • the pipe clamp 10 comprises an outer clamping unit 20 and an inner sleeve 22.
  • the clamping unit 20 comprises five clamping members 24.
  • Each clamping member 24 consists of a pair of robust parallel flat annular members 26 joined at their ends by robust radial end plates 28.
  • the end plates 28 all are substantially rectangular in shape with rounded upper corners 30.
  • the lower ends 32 of the clamping members 24 are slightly narrower than the majority portion of these members and their outside surfaces 34 are tapered inwardly.
  • the lower ends 32 extend beyond the lower edge of the end plate 28 to form clamping feet which are flat.
  • the inner surfaces 38 of the clamping feet 36 are shaped to lie on the circumference of a nominal circle, which circumference comprises the lengths of the inner surfaces 38 plus sixty millimetres.
  • each end plate 28 At the centre of the lower edge 39 of each end plate 28 is a slot 40.
  • the slot 40 is in the shape of the frustum of an isosceles triangle with its upper sides at a very acute angle to one another.
  • each plate 28 Near the upper end of each plate 28 is a bolt hole 42.
  • the inner sleeve 22 has an axial length of about one and a half times the width of the end plate 28.
  • the sleeve 22 has a large central flange 44.
  • On each side of the flange 44 are a pair of tooth rings 46 and 48 of right angled triangular section.
  • Each ring comprises a front face 50 standing normal to the outside surface of the sleeve 22 by about 3 mm high and facing the flange 44 and an outer inclined face 52 joining the front face 50 at a sharp corner 53.
  • the distance between the front face 50 of each outer ring 48 to the beginning of the inclined face 52 of the adjacent inner ring 46 is approximately the same as the distance between the front face 50 of the inner ring 46 and the adjacent surface 54 of the flange 44.
  • the sleeve 22 has an extension portion 56 at each end distanced from the outer ring 48 by about half of the distance between the tooth rings 48 and 46.
  • a low flange 57 having a flat peripheral surface 58 about two thirds of the width of the flange 44 is provided at the outer end of each extension portion 56.
  • the flange 57 projects upwardly by the same height as the tooth rings 46 and 48.
  • the extension portions 56 and the flanges 57 serve to limit the possibility of the pipes bending about the location of the outer tooth rings 48.
  • the facing end plates 28 of adjacent clamping members 24 are connected by pressurising means in the form of nut and bolt sets 60.
  • the diameter of the shank 62 of the bolt is smaller than the diameter of the bolt holes 40 of the end plates 28 so that, when the nut and bolt sets are loose, the clamping members 24 can swivel relative to each other.
  • the pipe clamp 10 is used as follows:- One half of the sleeve 22 is inserted into the end of one of the pipes (say 12) so that the flange 44 bears against the end face 64 of the pipe. The other pipe 14 is now fitted over the other half of the sleeve 22 until its end face 66 is close to the flange 44.
  • Four of the clamping members 24 are connected together by nut and bolt sets 58 which are loose. This enables the clamping members 24 to swivel relative to each other to permit the clamping members to surround slightly less than about four fifths of the circumference of the pipes 12 and 14.
  • the clamping members 24 are manipulated so that the outer edge of the central flange 44 fits into the slots 40 in the end plates 28.
  • the fifth clamping member 24 is inserted between the first and fourth clamping members and is connected thereto by nut and bolt sets 60 passing through the bolt holes 40.
  • the slots 40 in the end plates 28 of the fifth clamping member receive the edge of the flange 44.
  • the nut and bolt sets 60 are tightened to an even finger tightness in which case the distance between the end plates 28 of all the clamping members 24 is about 12 mm.
  • the nut and bolt sets 60 are tightened evenly until the clamping unit 20 clamps the pipes 12 and 14 firmly against the sleeve 22. When this occurs, the distance between end plates 28 is about 6 mm.
  • the clamping unit will have compressed the wall of each pipe 12 and 14 so that the diameters of the pipes are reduced by a little under ten millimetres.
  • the tooth rings 46 and 48 bite into the inner surfaces 68 and 70 of the pipes 12 and 14. It will be noted that the feet 36 will engage the outer surfaces 72 and 74 of the pipes 12 and 14 between the location at which the tooth rings 46 and 48 engage the inner surfaces 68 and 70 of the pipes 2 and 14.
  • the invention is not limited to the precise constructional details hereinbefore described and illustrated.
  • a pipe clamp for use with larger pipes say of a metre in diameter, more than five clamping members may have to be provided to enable sufficient clamping force to be achieved by workmen using conventional spanners.
  • the pipe clamps can also be used for joining pipes that form a pipe line conveying clean water such as water being supplied to a fire damping nozzles.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

L'invention porte sur un collier de serrage (10) destiné à serrer l'une contre l'autre deux longueurs de tube d'épaisseur de paroi notable, le collier de serrage comprenant une unité de serrage agencée pour entourer les extrémités des tubes, l'unité de serrage étant formée d'une pluralité d'éléments de serrage (24) et de moyens de mise sous pression (60) aptes à attirer les éléments de serrage l'un contre l'autre pour serrer les tubes contre l'élément intérieur, caractérisé en ce qu'il comprend au moins cinq éléments de serrage et que les moyens de mise sous pression sont agencés entre chacun des moyens de serrage pour les attirer l'un vers l'autre, les moyens de pression comprenant des jeux de vis et d'écrous.
PCT/ZA2012/000024 2011-04-28 2012-04-25 Colliers de serrage Ceased WO2012149585A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ZA2013/09432A ZA201309432B (en) 2011-04-28 2013-12-13 Pipe Clamps

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA201103296 2011-04-28
ZA2011/03296 2011-04-28

Publications (1)

Publication Number Publication Date
WO2012149585A1 true WO2012149585A1 (fr) 2012-11-01

Family

ID=46298729

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2012/000024 Ceased WO2012149585A1 (fr) 2011-04-28 2012-04-25 Colliers de serrage

Country Status (2)

Country Link
WO (1) WO2012149585A1 (fr)
ZA (1) ZA201309432B (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1532596A (en) 1923-07-18 1925-04-07 Peter Madsen Hose clamp
FR724766A (fr) 1931-10-19 1932-05-02 English Steel Corp Ltd Perfectionnements aux joints de tuyaux ou récipients devant résister à la pression d'un fluide
US3164401A (en) * 1961-02-20 1965-01-05 Pratt Co Henry Expansion joint
EP0390747A2 (fr) 1989-03-31 1990-10-03 Geberit AG Raccord étanche, notamment pour tuyaux à plusieurs couches en matière plastique
WO2000077435A1 (fr) 1999-06-15 2000-12-21 Ian Cartledge Collier de tuyauterie souple
US6499774B1 (en) * 2001-02-14 2002-12-31 Southeastern University Research Assn. Radial wedge flange clamp

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1532596A (en) 1923-07-18 1925-04-07 Peter Madsen Hose clamp
FR724766A (fr) 1931-10-19 1932-05-02 English Steel Corp Ltd Perfectionnements aux joints de tuyaux ou récipients devant résister à la pression d'un fluide
US3164401A (en) * 1961-02-20 1965-01-05 Pratt Co Henry Expansion joint
EP0390747A2 (fr) 1989-03-31 1990-10-03 Geberit AG Raccord étanche, notamment pour tuyaux à plusieurs couches en matière plastique
WO2000077435A1 (fr) 1999-06-15 2000-12-21 Ian Cartledge Collier de tuyauterie souple
US6499774B1 (en) * 2001-02-14 2002-12-31 Southeastern University Research Assn. Radial wedge flange clamp

Also Published As

Publication number Publication date
ZA201309432B (en) 2017-09-27

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