EP0434712B1 - A method and an apparatus for pushing pipes along a pipe line - Google Patents

A method and an apparatus for pushing pipes along a pipe line Download PDF

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Publication number
EP0434712B1
EP0434712B1 EP89909890A EP89909890A EP0434712B1 EP 0434712 B1 EP0434712 B1 EP 0434712B1 EP 89909890 A EP89909890 A EP 89909890A EP 89909890 A EP89909890 A EP 89909890A EP 0434712 B1 EP0434712 B1 EP 0434712B1
Authority
EP
European Patent Office
Prior art keywords
pipe
piston
pushing
duct
elongated support
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.)
Expired - Lifetime
Application number
EP89909890A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0434712A1 (en
Inventor
Bertil Liljehammar
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.)
Individual
Original Assignee
Individual
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
Priority claimed from SE8803096A external-priority patent/SE461748B/sv
Application filed by Individual filed Critical Individual
Publication of EP0434712A1 publication Critical patent/EP0434712A1/en
Application granted granted Critical
Publication of EP0434712B1 publication Critical patent/EP0434712B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder

Definitions

  • the present invention relates to an apparatus for pushing pipes along a duct for relining said duct, said apparatus being arranged to be positioned in association with the duct, and including a pushing piston for exerting a forward pushing force on a pipe, a holding-up device for supportingly cooperating with the pushing piston during operation thereof, and a pipe supporting device for carrying the pipe around the pushing piston during movement of the latter, the holding up device comprising an elongated support intended to be located in line with a duct to be relined.
  • the invention also relates to a method for pushing forward pipes along a duct by means of the apparatus, comprising feeding the pipes to the duct and successively pushing forward them by means of the pushing piston.
  • Relining is a method by means of which pipes are joined and pushed, e.g. from a manhole, into an existing pipe line connected to the manhole, for reconditioning the pipe line.
  • an apparatus of the kind, indicated by way of introduction above and according the first part of claim 1 is known through the Swedish laid-out specification 411.641.
  • This pushing apparatus must be lifted out of a duct for reloading it with a new pipe.
  • the apparatus lacks means for holding a previously pushed forward pipe in order to make possible connection together of a new pipe section and this pipe section before pushing forward.
  • the holding-up device is not integrated with the apparatus.
  • U.S. 4 159 819 discloses an apparatus for pushing forward pipes which are not carried around any pushing piston. Instead two pushing cylinders are arranged one on each side of a pipe to be pushed. One or both of the pistons are sidewardly swingable for admitting sideward introduction of a new pipe section in the apparatus.
  • DE 31 21 426 discloses a mechanical or hydraulic device for facilitating pushing forward of a pipe into the muff end of another pipe.
  • DE 31 21 426 does not, however, relate to problems appearing in connection with so called relining.
  • U.S. patent specification 4 082 248 discloses an apparatus with two pushing pistons operating inside a pipe to be pushed forward by means of pressure abutments acting against the rear end of the pipe and by means of a holding-up plate.
  • the piston rods are drawn into the pressure cylinders for admitting sideward introduction of a new pipe section, whereupon the pushing apparatus is brought back into the new pipe section.
  • the European patent application 0 270 458 discloses an apparatus for driving a passage in earth between two ditches or similar.
  • a drive head is driven successively forward by means of connecting in intermediate rods between a pushing apparatus and the head.
  • the pushing apparatus is a piston-cylinder device, the piston rod of which has a central bottom hole for receiving said intermediate rods.
  • the piston-cylinder device is pivoted around an axis so as to be swingable upwardly for receiving the rod.
  • the U.S. patent specification 4 299 375 discloses an apparatus for driving a passage under a road embankment.
  • the apparatus drives a passage under a road embankment and thereafter draws pipes in the opposite direction through the passage.
  • the pushing forward is carried through by means of a hydraulic cylinder acting between a rear support and a yoke rod, the lower end or yoke of which acts against the pushing rods, and the upper end of which is connected to a device for lifting the yoke from a slot between two interconnected pushing rods so that the yoke can be moved rearwardly to the rear end of the next pressure rod to be connected.
  • the drawing in of the pipe line is carried through by the same working operations but in the opposite direction, i.e. the cylinder is brought to successively draw, via the yoke, the interconnected rods backwardly.
  • a general object of the invention is to provide an apparatus and a method greatly simplifying reconditioning of an existing duct by lining the same with pipes.
  • a more specific object of the invention is to provide an apparatus and a method for pushing pipes along a pipe line, for reling the same as discussed above, which, as compared with earlier apparatus and methods is simpler and cheaper as to its design, admits lowering into and use in a simple way in a manhole, within the space admitted by the manhole, and admits relining of a certain pipe line for a considerably cheaper price and in a considerably shorter time than has been possible thus far.
  • the holding-up device having means for swingably carrying said pushing piston together with said pipe supporting device, at one end of the latter, on said elongated support so as to be swingable between an operative position, along the elongated support, allowing the piston to push a pipe, carried by said pipe supporting device, in the direction of the duct, and a pipe receiving position deviating from said operative position and allowing a pipe to be received on said pipe supporting device, the pushing piston at its leading end carrying struts extending essentially to the trailing end of the pushing piston, where said struts carry a pressure abutment for bringing the pipe with it during forward stroke of the piston, means for carrying at the leading end of said elongated support a pipe retaining device for holding the trailing end portion of a previously pushed forward pipe, while performing a connecting stroke with the piston for connecting a pipe, carried by said pipe supporting device around the piston, with said previously pushed forward pipe.
  • the method according to the invention is characterized by using the said apparatus and by exerting the action of the piston on each pipe after it having been positioned around the pushing piston when the latter takes a position deviating from the pushing direction thereof, and performing, before the pushing forward operation proper, a connecting stroke by the piston for connecting the pipe carried around the piston with the trailing end portion of a previously pushed forward pipe.
  • the apparatus as main portions includes an elongated trough-shaped bottom portion or cradle 2, open at both ends, a piston-cylinder device generally designated 4, and a collar-retaining device generally designated 6, whereof the two last-mentioned devices will be described more closely below. Since the present description will be carried through partly with reference to pipes of the short pipe type, with which the apparatus will be working, such a pipe will be briefly described with reference to Figure 2.
  • the pipe conventionally manufactured of hard plastic, and being designated 8, at each end has a number of outer grooves 10 intended to cooperate, in a manner not shown and described, with an end collar 12.
  • one or more of the grooves 10 can contain sealing rings for sealing between the tube 8 and the collar 12, and otherwise define protrusions for cooperation with corresponding formations in the inside of the collar 12, for snap connection between the pipe 10 and the collar 12.
  • the collar 12 has a symmetrical shape for receiving one pipe 8 in each end.
  • Short pipes and collars of the kind described here can be of conventional type, available on the market.
  • the cylinder, designated 14, of the piston-cylinder device 4 is pivotally mounted at 16 on a cross piece 18 between the sides of the cradle 2, at one end thereof.
  • the piston rod included in the piston-cylinder device is designated 20, and is shown with dashed and dotted lines in Figure 1.
  • the cradle 2 and the cross piece 18 may be said to form part of a "holding-up device” supportingly cooperating with the piston 20 during operation thereof.
  • the piston rod 20 at its leading end carries a plate 22 with a partly essentially circular contour 24 with a radius somewhat less than the inner diameter of the tube 8 with the attached collar 12.
  • the plate 22 also has a straight bevel 26 with a function to be descibed more closely below.
  • the ratio between the radii of curvature of the plate 22 and the trough 2 is such that the pipe 8 can be supported with clearance between the contour 24 and the inner wall of the trough 2, said inner wall in the position shown in Figure 1 extending essentially coaxial with the contour 24.
  • the plate 22 is connected to a pressure abutment plate 28, which is located essentially in plane with the rear end of the piston rod.
  • the plate 28 has a radius, which is greater than the inner radius of the collar 12 but less than the inner radius of the trough 2.
  • the plate 28 has a recess 30 for the cylinder 14 and the appurtenant structure extending along the same, so that the plate 28 can move freely along the cylinder 14 between the entirely rear position shown in Figure 1 and a forward position in the vicinity of the leading end of the cylinder, corresponding to the position of the plate 22 shown with dashed and dotted lines in Figure 1.
  • the hydraulic fluid supply to the cylinder 14 takes place through hoses 32 and 34, respectively, and a hydraulic fluid branch pipe 36 extends to the leading end of the cylinder 14.
  • the details of the design of the piston-cylinder device 4 can, as mentioned above, be of a conventional kind and need therefore not be described more closely here.
  • the hoses 32 and 34 are connected to a valve box 38 which can be attached to the trough 2 or, alternatively, to the collar retaining device 6 described more closely below.
  • Hydraulic hoses 40 lead to the valve box 38 from a pump assembly, not shown, the hoses 40 being so long that the pump assembly can stand on the ground adjacent to a manhole in the bottom of which the apparatus is arranged in a way appearing more closely from Figures 4-8 and the corresponding description below.
  • the pump assembly can be of a kind known per se and available on the market, e.g. a portable 220 V so called hydraulic packet.
  • the apparatus according to the invention and such a pump assembly do not occupy greater space than being able to be carried together in a small delivery van or a great passenger car.
  • the collar retaining device 6 includes a plate 44 which, by means of an arm 46 on each side of the trough 2, is pivotally supported in the end faces of the cross piece 18 through the corresponding wall portions of the trough 2.
  • a handle 45 is attached to the plate 44 to allow lifting of the later as will be described more closely below.
  • the plate 44 In the position shown in Figure 1, in which the plate 22 is completely inserted, the plate 44 is located on a distance from the plate 28 which, for reasons appearing from the description below with reference to Figures 4-8, essentially corresponds to the added lengths of a pipe 8 with attached collar 12 according to Figure 2, and a further collar 12 located at some distance from that end of the pipe 8 not provided with a collar.
  • the plate 44 furthermore has an inner arcuate recess 48 with a radius essentially corresponding to the outer radius of the pipe 8, and thus is smaller than the outer radius of the collar 12.
  • the apparatus is placed in the way shown in Figures 4-8 in the bottom of a manhole 50, from which the pipe line to be reconditioned by relining starts. The beginning of this pipe line is shown at 52.
  • the apparatus is placed in line with the pipe line 52 and so that the rear end of the trough 2 is supported against a step 54 in the bottom of the manhole.
  • This step 54 can be formed in a conventional way as the end of an elongated recess in the bottom of the manhole, leading to an opening to which the pipe line 52 is connected. Lacking such a premanufactured recess some form of stop piece, forming a step, can be placed between the wall of the manhole and the rear end of the trough 2.
  • the step shall not be higher than allowing the swinging movement of the piston-cylinder device 4 to the position shown in Figure 3, i.e.
  • the apparatus according to the invention is not heavier than well admitting such lifting of the rear end of the trough 2, e.g. up onto the step, where appropriate.
  • the piston-cylinder device With the apparatus arranged in the way described, the piston-cylinder device is swung to the position shown in Figure 3 so that it points upwardly and admits receipt of a pipe, e.g. of the kind shown in Figure 2 with a collar 12 attached thereto. More particularly, the pipe is moved, with the collar 12 first, over the support structure formed by the plate 26 and the rods 27, so that the collar will abut against the plate 28.
  • the piston-cylinder device with the pipe sitting thereon is thereafter lowered to the position shown in Figures 4 and 6-8 and a pushing forward stroke of the pushing piston 20 is started by operating the stick 42. This stroke is ended by the leading edge of the collar 12 being stopped by the stop abutment 44, as shown in Figure 4.
  • the piston-cylinder device 4 is now raised again for receiving a new pipe 8 with a collar 12 attached thereto, as is indicated by the arrow designated 58 in Figure 5.
  • the piston-cylinder device 4 with the pipe sitting thereon is thereafter lowered again, as indicated by the arrow 60 in Figure 5. Due to the above described dimensioning of the distance between the plates 28 and 44, the leading edge of the pipe 8 is then placed with some clearance with respect to the collar 12 of the pipe already pushed forward. A joining stroke of the pushing piston 20 is now started in order to snap the leading edge of the new pipe into the collar.
  • Figure 6 illustrates the end of this step.
  • a retaining device 44 is described above and shown, which is particularly suited for outer collars.
  • a clamping device for the tube including the collar can instead be used.
  • This clamping device can e.g. be designed with jaws or similar which are abutted against the outside of the trailing end portion of the pipe.
  • the jaws can be hydraulically operated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Cleaning In General (AREA)
  • Load-Engaging Elements For Cranes (AREA)
EP89909890A 1988-09-05 1989-08-31 A method and an apparatus for pushing pipes along a pipe line Expired - Lifetime EP0434712B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE8803096 1988-09-05
SE8803096A SE461748B (sv) 1988-09-05 1988-09-05 Apparat och saett foer framtryckning av roer vid relining
SE8902783 1989-08-21
SE8902783A SE8902783D0 (sv) 1988-09-05 1989-08-21 Apparat foer framtryckning av roer
PCT/SE1989/000457 WO1990002903A1 (en) 1988-09-05 1989-08-31 A method and an apparatus for pushing pipes along a pipe line

Publications (2)

Publication Number Publication Date
EP0434712A1 EP0434712A1 (en) 1991-07-03
EP0434712B1 true EP0434712B1 (en) 1995-04-05

Family

ID=26660290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89909890A Expired - Lifetime EP0434712B1 (en) 1988-09-05 1989-08-31 A method and an apparatus for pushing pipes along a pipe line

Country Status (9)

Country Link
EP (1) EP0434712B1 (fi)
AU (1) AU4203589A (fi)
CA (1) CA1303602C (fi)
DE (1) DE68922111T2 (fi)
DK (1) DK36591D0 (fi)
FI (1) FI98243B (fi)
NO (1) NO301441B1 (fi)
SE (1) SE8902783D0 (fi)
WO (1) WO1990002903A1 (fi)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO301435B1 (no) * 1995-10-20 1997-10-27 Tom Toralv Roeynestad Anordning ved borerigg med boretårn
GB2484141A (en) * 2010-10-01 2012-04-04 Dyno Rod Ltd Renewal of Drainage Infrastructure

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2830548A (en) * 1954-03-08 1958-04-15 Mcelvany James Leon Pipe-laying method
DE2241695C3 (de) * 1972-08-24 1978-06-01 Gewerkschaft Eisenhuette Westfalia, 4670 Luenen Vorpreßvorrichtung für den Rohrvorpreßbetrieb
AR205935A1 (es) * 1975-02-06 1976-06-15 Gewerk Eisenhuette Westfalia Mejoras en dispositivos para el prensado de tubos
US4299375A (en) * 1978-10-16 1981-11-10 Schosek William O Underground pipe installing device
DE3121426A1 (de) * 1981-05-29 1982-12-23 Fritz 8150 Holzkirchen Bichler "rohrmuffenpresse zum kanalverlegen"
FR2607531B1 (fr) * 1986-12-02 1989-02-24 Delbaere Gilles Dispositif de forage de sol agissant selon un axe sensiblement horizontal

Also Published As

Publication number Publication date
WO1990002903A1 (en) 1990-03-22
NO910674D0 (no) 1991-02-20
NO301441B1 (no) 1997-10-27
EP0434712A1 (en) 1991-07-03
DK36591A (da) 1991-03-01
FI98243B (fi) 1997-01-31
AU4203589A (en) 1990-04-02
SE8902783D0 (sv) 1989-08-21
DK36591D0 (da) 1991-03-01
DE68922111T2 (de) 1995-11-30
CA1303602C (en) 1992-06-16
FI911024A0 (fi) 1991-02-28
NO910674L (no) 1991-02-20
DE68922111D1 (de) 1995-05-11

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