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GB2145647A - A tool for removing surplus material from a pipe - Google Patents

A tool for removing surplus material from a pipe Download PDF

Info

Publication number
GB2145647A
GB2145647A GB08327629A GB8327629A GB2145647A GB 2145647 A GB2145647 A GB 2145647A GB 08327629 A GB08327629 A GB 08327629A GB 8327629 A GB8327629 A GB 8327629A GB 2145647 A GB2145647 A GB 2145647A
Authority
GB
United Kingdom
Prior art keywords
pipe
holder
blade
bead
tool
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.)
Withdrawn
Application number
GB08327629A
Other versions
GB8327629D0 (en
Inventor
Thomas Boyle
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.)
British Gas Corp
Original Assignee
British Gas Corp
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 British Gas Corp filed Critical British Gas Corp
Publication of GB8327629D0 publication Critical patent/GB8327629D0/en
Publication of GB2145647A publication Critical patent/GB2145647A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D5/00—Planing or slotting machines cutting otherwise than by relative movement of the tool and workpiece in a straight line
    • B23D5/02—Planing or slotting machines cutting otherwise than by relative movement of the tool and workpiece in a straight line involving rotary and straight-line movements only, e.g. for cutting helical grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
    • B23D79/02—Machines or devices for scraping
    • B23D79/021—Machines or devices for scraping for removing welding, brazing or soldering burrs, e.g. flash, on pipes or rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)

Abstract

The invention relates to a tool for removing an external peripheral bead of surplus material formed at a butt-welded joint in a plastics pipe. The tool comprises a blade 5 and a blade holder 6 which is releasably attachable to the pipe 2 by means of an attachment 7 in such a manner that the holder 6 engages the external surface of the pipe 2 while movement of the holder 6 around the circumference of the pipe 2 is permitted. The blade 5 is so positioned in the holder 6 that movement of the holder 6 in a clockwise direction around the pipe 2 while the holder 6 is attached to the pipe 2 and the blade 5 is engaging the bead 4 causes the bead 4 to be removed by the blade 5. <IMAGE>

Description

SPECIFICATION A tool for removing surplus material from a pipe This invention relates to a tool for removing an external peripheral bead of surplus material formed at a butt-welded joint in a plastics pipe.
Plastics pipes of polyethylene, aldyl or similar material are now extensively used in the gas and water industries as mains. In the laying of mains of such material, it is conventional practice to join shorter lengths of such pipes together to form a continuous longer main. The technique of jointing most widely used is butt-welding in which the ends of adjacent pipes are butt-welded together by simultaneously pressing the ends together while fusing a small end thickness of the adjacent pipes. This produces at the joint, a peripheral bead of surplus material formed on the inside and outside of the jointed pipe.
The presence of the external peripheral bead of surplus material may make it difficult if not impossible to push the pipe into a plastics liner such as is used in the mains replacement technique fully described in our published UK patent application no.
2092701 A.
It is therefore an object of the present invention to provide a tool which can remove this external bead from the pipe before it is pushed into the liner.
According to the present invention there is provided a tool for removing an external peripheral bead of surplus material formed at a butt-welded joint in a plastics pipe, the tool comprising a blade and a blade holder which is releasably attachable to the pipe in such a manner that the holder engages with the external surface of the pipe while movement of the holder around the circumference of the pipe is permitted, the blade being so positioned in the holder that movement of the holder in one direction around the pipe while the holder is attached to the pipe and the blade is engaging the bead causes the bead to be removed by the blade.
An embodiment of the invention will now be particularly described with reference to the accompanying drawings in which: Figure 1 is a longitudinal section elevation through a jointed aldyl pipe showing the bead of surplus material, Figure 2 is a sectional elevation of the tool mounted on the pipe, Figure 3 is a cross section through the holder, Figure 4 is a section on the centre line of the pipe showing the tool mounted on the pipe and Figure 5 is an isometric view of the components of the tool.
Referring to Figure 1, the surplus material at the joint 1 of the jointed pipe 2 forms an internal and external circumferential bead 3 and 4 respectively.
The external bead must be removed if the pipe 2 is to be pushed into a liner.
Referring to Figures 2 to 5, the tool comprises a flat metal blade 5 which is mounted in a blade holder 6, to which is attached a releasable clamping means 7 for clamping the holder 6 on the pipe 2 in the manner shown in Figure 2.
The blade holder 6 which may be of steel or plastics comprises a block formed in two half body portions 8 and 9 as shown in Figure 4. Each half body 8 and 9 comprises a generally rectangular uppermost portion 10 from which there depends a lowermost pipe wall engaging leg 11.
Each portion 10 is formed with a machined slot 12 between the legs 11 and within which the blade 5 is held as by a force-fitting. In use the half bodies 8 and 9 are clamped together by a pair of Allen-type body screws 13 which extend through suitable screw threaded apertures in the half-bodies 8 and 9. This results in the formation of a bead escapment aperture 14 within the body of the holder 6, the half bodies 8 and 9 being formed on their internal surfaces with corresponding recesses 15 and 16 (see Figure 4) which cooperate to form the escapment 14 when the half-bodies 8 and 9 are clamped together.
The angle of the blade 5 is such that in use the bead 4 removed by the blade 5 is caused to enter and leave the holder 6 by way of escapment 14 as shown in Figure 3. Each leg 11 of the half bodies 8 and 9 is formed with a lowermost surface 17 for engaging the external surface of the pipe 2 on either side of the bead 4 as shown in Figure 4the blade 5 lying between the legs 11 to engage the bead 4. The surfaces 17 are, as shown in Figures 2,3 and 5 shaped to conform with the circumference.
The blade cutting edge 18 should ideally terminate level with the surfaces 17 so that, in use, the complete thickness of the bead 4 is removed.
The releasable clamping means 7 comprises a pair of generally semi-circular steel straps 19 and 20. One end of each strap 19,20 is secured to locating pins 21 which extend between the half bodies 8 and 9. For this purpose, the half bodies 8 and 9 are partly cut away to form two pairs of end shoulders 22. The pins 21 are releasably retained in apertures in the shoulders 22 and the ends of the straps 19,20 are looped to slidably fit over the pins so that the loops 23 are located between each shoulder 22 in the pair. Each strap is provided with steel guides 24 and 25 welded to the inside of each strap as shown in Figure 1. The guides 24, 25 take the form of blocks which are provided with a notch or channel on the surface lying adjacent the bead so as to clear the bead.
One of the straps, in this case strap 18 is provided with a steel handle 26 to enable the assembly in use to be manually moved about the pipe circumference after attachment to the pipe 2.
As shown in Figure 2, the other ends of the straps 19,20 are provided with a releasable toggle catch arrangement 27 to enable the straps to be secured to each other after location about the pipe circumference.
After positioning of the tool on the pipe 2 in the manner shown in the figures, movement of the handle in a clockwise direction will cause the blade 5 to bite into the bead 4 and, with continuing movement of the holder around the pipe circumference, to strip the bead 4 from the pipe 2 in the manner shown in Figure 3. The stripped bead 4 enters and leaves the holder by way of the escapment. After the bead has been removed, the toggle catch 24 can be released to release the straps 18 and 19 from each other and the tool from the pipe.

Claims (5)

1. Atool for removing an external peripheral bead of surplus material formed at a butt-welded joint in a plastics pipe, the tool comprising a blade and a blade holder which is releasably attachable to the pipe in such a manner that the holder engages with the external surface of the pipe while movement of the holder around the circumference of the pipe is permitted, the blade being so positioned in the holder that movement of the holder in one direction around the pipe while the holder is attached to the pipe and the blade is engaging the bead causes the bead to be removed by the blade.
2. A tool as claimed in Claim 1 in which the holder has a body formed with an aperture permitting discharge of the bead through the body and the blade is positioned so that after removal by the blade the bead enters the aperture.
3. A tool as claimed in claim 2 in which the holder has two surfaces for engaging the external surfaces of the pipe lying on either side of the bead, the blade lying between the two holder surfaces.
4. Atool substantially as hereinbefore described with reference to Figures 2 to
5.
GB08327629A 1983-08-26 1983-10-14 A tool for removing surplus material from a pipe Withdrawn GB2145647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB838323118A GB8323118D0 (en) 1983-08-26 1983-08-26 Tool for removing surplus material from pipe

Publications (2)

Publication Number Publication Date
GB8327629D0 GB8327629D0 (en) 1983-11-16
GB2145647A true GB2145647A (en) 1985-04-03

Family

ID=10547982

Family Applications (2)

Application Number Title Priority Date Filing Date
GB838323118A Pending GB8323118D0 (en) 1983-08-26 1983-08-26 Tool for removing surplus material from pipe
GB08327629A Withdrawn GB2145647A (en) 1983-08-26 1983-10-14 A tool for removing surplus material from a pipe

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB838323118A Pending GB8323118D0 (en) 1983-08-26 1983-08-26 Tool for removing surplus material from pipe

Country Status (1)

Country Link
GB (2) GB8323118D0 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2333733A (en) * 1998-01-28 1999-08-04 Uponor Ltd Wrap around pipe preparing tool
EP1142681A2 (en) * 2000-04-08 2001-10-10 Armin Dommer Cutting device for removing annular welding flash from plastic pipes
US6968762B1 (en) 1999-05-25 2005-11-29 Caldervale Technology Limited Pipe preparing tool V

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB755510A (en) * 1953-06-18 1956-08-22 British Insulated Callenders An improved tool for removing welding flashes
GB1443622A (en) * 1974-04-22 1976-07-21 Bastiansen G Cutting and chamfering tool for tubes
GB1462926A (en) * 1974-06-18 1977-01-26 Sommer P Device for chamfering the end faces of round tubes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB755510A (en) * 1953-06-18 1956-08-22 British Insulated Callenders An improved tool for removing welding flashes
GB1443622A (en) * 1974-04-22 1976-07-21 Bastiansen G Cutting and chamfering tool for tubes
GB1462926A (en) * 1974-06-18 1977-01-26 Sommer P Device for chamfering the end faces of round tubes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2333733A (en) * 1998-01-28 1999-08-04 Uponor Ltd Wrap around pipe preparing tool
WO1999038635A1 (en) * 1998-01-28 1999-08-05 Uponor Innovation Ab Pipe preparing tool
GB2348846A (en) * 1998-01-28 2000-10-18 Uponor Innovation Ab Pipe preparing tool
US6968762B1 (en) 1999-05-25 2005-11-29 Caldervale Technology Limited Pipe preparing tool V
EP1142681A2 (en) * 2000-04-08 2001-10-10 Armin Dommer Cutting device for removing annular welding flash from plastic pipes
EP1142681A3 (en) * 2000-04-08 2002-05-08 Armin Dommer Cutting device for removing annular welding flash from plastic pipes

Also Published As

Publication number Publication date
GB8327629D0 (en) 1983-11-16
GB8323118D0 (en) 1983-09-28

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)