WO1982002238A1 - Method and apparatus for laying pipes - Google Patents

Method and apparatus for laying pipes Download PDF

Info

Publication number
WO1982002238A1
WO1982002238A1 PCT/SE1980/000343 SE8000343W WO8202238A1 WO 1982002238 A1 WO1982002238 A1 WO 1982002238A1 SE 8000343 W SE8000343 W SE 8000343W WO 8202238 A1 WO8202238 A1 WO 8202238A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipes
laying
pipe
place
clamped
Prior art date
Application number
PCT/SE1980/000343
Other languages
French (fr)
Inventor
Pitea Ab Stalbyggarna
Ivar Oeberg
Original Assignee
Pitea Ab Stalbyggarna
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 Pitea Ab Stalbyggarna filed Critical Pitea Ab Stalbyggarna
Priority to DE19803050679 priority Critical patent/DE3050679A1/en
Priority to PCT/SE1980/000343 priority patent/WO1982002238A1/en
Publication of WO1982002238A1 publication Critical patent/WO1982002238A1/en
Priority to FI822460A priority patent/FI822460A0/en
Priority to DK371482A priority patent/DK371482A/en

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
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
    • F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2846—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for tubes

Definitions

  • This invention relates to a method of and an apparatus for laying pipes, for example in trenches.
  • the pipe laying technique known at present implies that pipes are positioned one by one, for example in a trench, and thereafter are jointed and sealed to pipes previoulsy laid in the trench.
  • the pipes are subjected to hydrostatic tests in stages, usually after one working day cycle.
  • the discovery of a leakage involves the risk, that all pipes laid during one such cycle must be re-laid.
  • the pipes are transported to their place of laying, for example, by fork-trucks, which implies that the pipes, which preferably are of concrete, can easily be damaged.
  • the present invention has the object to provide a method and an apparatus of the aforementioned kind, at which the aforesaid disadvantages are eliminated.
  • This object is achieved by a method and an apparatus, which have been given the characterizing features defined in the attached claims.
  • An embodiment of the invention is described in the following, with reference to the accompanying drawings, in which Fig. 1 shows a mounting beam according to the invention, Fig. 2 shows the mounting beam laid upon supports, with a pipe package attached on the beam, Fig. 5 is a section along III-III in Fig. 2, and Fig. 4 shows the mounting beam laid upon supports provided with a hydrostatic test device.
  • the mounting beam shown in Fig. 1 is of lattice structure type and comprises a straight mounting profile 2 and two inclined profiles 3a and 3b. Said profiles 2, 5a and 5b are interconnected by means of vertical and diagonal struts 4 and, respectively, 5. At the meeting point of the profiles 3a and 3b a vertical lifting plate 6 is located which has an opening 7 for a lifting hook.
  • a stud 8 is located, the function of which will be explained below.
  • a plate 9 is attached, which is bent circular transversely to the longitudinal direction of the beam 1.
  • a plurality of substantially equally spaced bearing crows 10 are attached, in connection to which strips 11 are arranged, which are provided with locking clamps 11' to clamp the strips 11, for example about a concrete pipe.
  • the locking clamps 11' should be of the type operated by a simple hand grip.
  • FIG. 2 the mounting beam 1 according to the invention is shown laid upon a pair of mounting trestles 12, with the lower profile 2 facing upward. As appears from Fig. 2. it is the stud 8 and, respectively, the plate 9 which rest on the trestles 12a and 12b.
  • the stud 8 is received in a depression in the trestle 12a, while the plate 9 rests loosely on the trestle 12b.
  • a number of concrete pipes 13 are clamped on the beam 1 by means of the strips 11, which are stretched about the pipes 13 by means of the members 11'.
  • the concrete pipes 13 are inserted one into the other, i.e. they have assumed the position relative to each other which corresponds to the final laying position.
  • the centre of gravity line of the entire structure is located below the rotation axis of the stud 8. This implies, that the position of the beam with pipes shown in Fig. 2 is stable, i.e. the beam 1 shows no tendency of rotating through half a revolution.
  • Fig. 3 appears the width of the profile 2 in relation to the concrete pipes 13 and also how the plate 9 extends upward along the circumference of the concrete pipe 13.
  • the entire package is rotated through half a revolution perpendicularly to rhe longitudinal direction of the pipes 13, so that the beam 1 assumes the position shown in Fig. 1, with the opening 7 oriented upward.
  • a lifting hook mounted on a suitable carrier is inserted into the opening 7, whereafter the entire package is moved to the place desired.
  • the carrier for the lifting hook may be, for example, a loader equipped with a lifting beam.
  • trestles 12a, 12b are shown provided with means for carrying out hydrostatic tests of the concrete pipes 13 clamped on the mounting beam 1.
  • a pressure medium cylinder 14 preferably of pneumatic type, is attached which can be pivoted in a plane in parallel with the longitudinal direction of the pipes 13.
  • a first pressure plate 16 is attached, which is pivotal relative to the piston rod 15 in the longitudinal direction of the pipes 15.
  • the pressure plate 16 is covered on its surface facing to the pipes 15 with a compressible sealing layer 17
  • a connecting nipple 18 for compressed air also is provided on the pressure plate 16.
  • a second pressure plate 19 is located on the trestle 12b and supported on an arm 20, which is hingedly attached to the pressure plate 19, so that the plate can pivot relative to the arm 20 in the longitudinal direction of the pipes 13.
  • the arm 20 is mounted pivotally at the lower portion of the trestle 12b.
  • Means are also provided for adjusting the contact of the pressure plate 19 on the pipe 13.
  • the said means is a rod 21, which is threaded at its free end and hingedly attached to the upper portion of the trestle 12b.
  • the arm 20 includes an opening, through which the rod 21 can pass.
  • a nut 22 is screwn, by means of which the contact pressure of the pressure plate 19 against the concrete pipe 13 can be adjusted.
  • the second pressure plate 19 also is provided on its surface facing to the pipes 13 with a sealing layer 17 and with a connecting nipple 23 for a pressure gauge device.
  • the aforesaid means for hydrostatic tests are used in such a manner that, when the concrete pipes 13 are clamped on the mounting beam 1, the second pressure plate 19 is caused to contact the free end of the right-hand concrete pipe in Fig. 4, and a suitable contact pressure is established by moving the nut 22 relative to the rod 21. Thereafter the first pressure plate 16 is caused to contact the free end of the left-hand concrete pipe 13 in Fig. 4 by moving the piston rod 15 of the cylinder 14 to the right in Fig. 4.
  • the pressure medium cylinder 14 preferably is actuated by connection to a compressor.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

Method of and apparatus for the laying of pipes, for example in trenches. The pipe laying technique known at present implies that pipes are laid one by one in a trench, whereafter they are jointed and sealed to the pipes previously laid in the trench. The pipes are subjected to hydrostatic tests in stages, usually after a one day working cycle. The discovery of a leak implies the risk that the entire working day cycle must be re-laid. The present invention relates to a method, which is characterized in that a mounting beam (1) having a straight mounting profile (2) is oriented with the mounting profile facing upward, whereafter a desired number of pipes (13) are clamped on the mounting profile (2). preferably by means of strips (11), and the pipes (13) are caused to assume such positions relative to each other on the beam which correspond to their final positions after the laying, that the beam (1) with the clamped pipes (13) is transferred to the place of laying for the pipes (13), whereafter the pipe package is adjusted to its final position, and the pipes (13) are released from the mounting profile (2) of the beam (1), which thereafter is removed from the place of laying.

Description

Method and apparatus for laying pipes
This invention relates to a method of and an apparatus for laying pipes, for example in trenches.
The pipe laying technique known at present implies that pipes are positioned one by one, for example in a trench, and thereafter are jointed and sealed to pipes previoulsy laid in the trench. The pipes are subjected to hydrostatic tests in stages, usually after one working day cycle. The discovery of a leakage involves the risk, that all pipes laid during one such cycle must be re-laid.
The pipes are transported to their place of laying, for example, by fork-trucks, which implies that the pipes, which preferably are of concrete, can easily be damaged.
The present invention has the object to provide a method and an apparatus of the aforementioned kind, at which the aforesaid disadvantages are eliminated. This object is achieved by a method and an apparatus, which have been given the characterizing features defined in the attached claims. An embodiment of the invention is described in the following, with reference to the accompanying drawings, in which Fig. 1 shows a mounting beam according to the invention, Fig. 2 shows the mounting beam laid upon supports, with a pipe package attached on the beam, Fig. 5 is a section along III-III in Fig. 2, and Fig. 4 shows the mounting beam laid upon supports provided with a hydrostatic test device.
The mounting beam shown in Fig. 1 is of lattice structure type and comprises a straight mounting profile 2 and two inclined profiles 3a and 3b. Said profiles 2, 5a and 5b are interconnected by means of vertical and diagonal struts 4 and, respectively, 5. At the meeting point of the profiles 3a and 3b a vertical lifting plate 6 is located which has an opening 7 for a lifting hook.
At the left-hand end of the lower profile 2 in Fig. 1 a stud 8 is located, the function of which will be explained below.
At the opposite end of the lower profile 2 a plate 9 is attached, which is bent circular transversely to the longitudinal direction of the beam 1.
On the lower profile 2 a plurality of substantially equally spaced bearing crows 10 are attached, in connection to which strips 11 are arranged, which are provided with locking clamps 11' to clamp the strips 11, for example about a concrete pipe. The locking clamps 11' should be of the type operated by a simple hand grip.
In Fig. 2 the mounting beam 1 according to the invention is shown laid upon a pair of mounting trestles 12, with the lower profile 2 facing upward. As appears from Fig. 2. it is the stud 8 and, respectively, the plate 9 which rest on the trestles 12a and 12b.
The stud 8 is received in a depression in the trestle 12a, while the plate 9 rests loosely on the trestle 12b. A number of concrete pipes 13 are clamped on the beam 1 by means of the strips 11, which are stretched about the pipes 13 by means of the members 11'.
As appears from Fig. 2, the concrete pipes 13 are inserted one into the other, i.e. they have assumed the position relative to each other which corresponds to the final laying position.
At the position of the beam 1 with the pipe package shown in Fig. 2, the centre of gravity line of the entire structure is located below the rotation axis of the stud 8. This implies, that the position of the beam with pipes shown in Fig. 2 is stable, i.e. the beam 1 shows no tendency of rotating through half a revolution.
From Fig. 3 appears the width of the profile 2 in relation to the concrete pipes 13 and also how the plate 9 extends upward along the circumference of the concrete pipe 13.
After the pipes 13 have been clamped on the mounting beam 1, the entire package is rotated through half a revolution perpendicularly to rhe longitudinal direction of the pipes 13, so that the beam 1 assumes the position shown in Fig. 1, with the opening 7 oriented upward.
In order to transfer the pipe package from the trestles 12a, 12b to a trench or other final place, a lifting hook mounted on a suitable carrier is inserted into the opening 7, whereafter the entire package is moved to the place desired.
The carrier for the lifting hook may be, for example, a loader equipped with a lifting beam. When the pipes 15 are in their final place, the strips 10 about the pipes are loosened, whereafter the mounting beam 1 is removed and can again be "charged" with a new set of pipes 13.
In Fig. 4 the trestles 12a, 12b are shown provided with means for carrying out hydrostatic tests of the concrete pipes 13 clamped on the mounting beam 1.
On the trestle 12a a pressure medium cylinder 14, preferably of pneumatic type, is attached which can be pivoted in a plane in parallel with the longitudinal direction of the pipes 13.
On the piston rod 15 of the cylinder 14 a first pressure plate 16 is attached, which is pivotal relative to the piston rod 15 in the longitudinal direction of the pipes 15. The pressure plate 16 is covered on its surface facing to the pipes 15 with a compressible sealing layer 17 A connecting nipple 18 for compressed air also is provided on the pressure plate 16.
A second pressure plate 19 is located on the trestle 12b and supported on an arm 20, which is hingedly attached to the pressure plate 19, so that the plate can pivot relative to the arm 20 in the longitudinal direction of the pipes 13. At its end remote from the plate 19, the arm 20 is mounted pivotally at the lower portion of the trestle 12b. Means are also provided for adjusting the contact of the pressure plate 19 on the pipe 13. At the embodiment shown, the said means is a rod 21, which is threaded at its free end and hingedly attached to the upper portion of the trestle 12b.
The arm 20 includes an opening, through which the rod 21 can pass. On the threaded free end of the rod 21 a nut 22 is screwn, by means of which the contact pressure of the pressure plate 19 against the concrete pipe 13 can be adjusted.
The second pressure plate 19 also is provided on its surface facing to the pipes 13 with a sealing layer 17 and with a connecting nipple 23 for a pressure gauge device.
The aforesaid means for hydrostatic tests are used in such a manner that, when the concrete pipes 13 are clamped on the mounting beam 1, the second pressure plate 19 is caused to contact the free end of the right-hand concrete pipe in Fig. 4, and a suitable contact pressure is established by moving the nut 22 relative to the rod 21. Thereafter the first pressure plate 16 is caused to contact the free end of the left-hand concrete pipe 13 in Fig. 4 by moving the piston rod 15 of the cylinder 14 to the right in Fig. 4. The pressure medium cylinder 14 preferably is actuated by connection to a compressor.
When the pressure plates 16 and 19 have closed the ends of the pipe package with the desired pressure, compressed air is introduced into the pipe package through the nipple 18, and at the same time a measuring device is connected to the nipple 23. When the desired pressure has been achieved, the compressed air supply ceases, and the measuring device as well as the pressure plates are removed from the pipe package. Thereafter the pipe package is transferred as described above to the place desired.
The aforesaid means for hydrostatic tests can also be utilized for inserting the pipes one into the other. The invention is in no way restricted to the embodiments described above, but can freely be varied within the scope of the attached claims.

Claims

Claims
1. A method at the laying of pipe packages, for example in trenches, at which a desired number of pipes (15) are clamped on a beam (1), preferably by means of strips (11), whereby the pipes (13) are caused to assume such positions relative to each other on the beam which correspond to their final positions subsequent to the laying, and the beam (1) with the clamped pipes (13) is transferred to the place of laying for the pipes (13), whereafter the pipe package is adjusted to its final position, and the pipes (13) are released from the mounting profile (2)of the beam (1), which thereafter is removed from the place of laying, c h a r a c t e r i z e d i n that at the clamping of the pipes (15) the beam (1) is laid loosely on supports (12a, 12b), and a mounting profile (2) of the beam (1), to which the pipes abut, is facing upward, and that prior to the transfer of the beam (1) to the place of laying the beam (1) is rotated through about half a revolution in its longitudinal direction. 2. A method as defined in claim 1, c h a r a c t e r i z e d i n that the pipes (15) clamped on the beam (1) are subjected to hydrostatic tests prior to the transfer of the pipe package to the place of laying. Z. An apparatus for the laying of pipe packages, for example in trenches, comprising a mounting beam (1) and means (11, 11') for fixing the pipes (15) relative to the profile (2), c h a r a c t e r i z e d i n that it comprises two support members (12a, 12b), on which the ends of the beam (1) are positioned at the clamping of the pipes (15).
4. An apparatus as defined in claim 5, c h a r a c t e r i z e d i n that the beam (1) includes an opening (7) or the like for receiving a lifting hook or the like.
5. An apparatus as defined in claim 5 or 4, c h a r a c t e r i z e d i n that the fixing means for the pipes (15) are strips (11) with locking clamps (11') arranged along the mounting profile (2).
6. An apparatus as defined in any one or more of the claims 3-5, c h a r a c t e r i z e d i n that on the support members (12a, 12b) means (14-23) for hydrostatic tests of the pipe package are attached.
7. An apparatus as defined in claim 6, c h a r a c t e r i z e d i n that the hydrostatic test means comprise two pressure plates (16,19) located at the ends of the pipe package, which plates can be caused to contact the ends of the pipe package with variable pressure.
8. An apparatus as defined in claim 6, c h a r a c t e r i z e d i n that the pressure plates (16,19) are provided with connecting nipples (18,25) for compressed air and, respectively, a pressure gauge device.
PCT/SE1980/000343 1980-12-19 1980-12-19 Method and apparatus for laying pipes WO1982002238A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19803050679 DE3050679A1 (en) 1980-12-19 1980-12-19 METHOD AND APPARATUS FOR LAYING PIPES
PCT/SE1980/000343 WO1982002238A1 (en) 1980-12-19 1980-12-19 Method and apparatus for laying pipes
FI822460A FI822460A0 (en) 1980-12-19 1982-07-09 FOERFARANDE OCH ANORDNING FOER LAEGGNING AV ROER
DK371482A DK371482A (en) 1980-12-19 1982-08-18 PROCEDURE AND APPARATUS FOR PIPING

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
WOSE80/00343801219 1980-12-19
PCT/SE1980/000343 WO1982002238A1 (en) 1980-12-19 1980-12-19 Method and apparatus for laying pipes

Publications (1)

Publication Number Publication Date
WO1982002238A1 true WO1982002238A1 (en) 1982-07-08

Family

ID=20339992

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1980/000343 WO1982002238A1 (en) 1980-12-19 1980-12-19 Method and apparatus for laying pipes

Country Status (4)

Country Link
DE (1) DE3050679A1 (en)
DK (1) DK371482A (en)
FI (1) FI822460A0 (en)
WO (1) WO1982002238A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1839322A (en) * 1929-08-01 1932-01-05 Stuart & Son Company T Method of and apparatus for laying pipe under water
US1874081A (en) * 1930-01-17 1932-08-30 Merrittchapman & Scott Corp Method of and apparatus for connecting pipes in building pipe lines
US2876717A (en) * 1955-10-14 1959-03-10 John J Tetyak Method of inter-sealing and laying pipe joints
US3267682A (en) * 1964-12-21 1966-08-23 Gunther And Shirley Company Method of submarine pipe laying
SE368622B (en) * 1972-11-22 1974-07-08 Falkenbergs Betongind Ab
SE397003B (en) * 1974-12-13 1977-10-10 Alfa Roer Ab DEVICE FOR HANDLING, TESTING AND INSPECTION OF CONCRETE RODS

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1839322A (en) * 1929-08-01 1932-01-05 Stuart & Son Company T Method of and apparatus for laying pipe under water
US1874081A (en) * 1930-01-17 1932-08-30 Merrittchapman & Scott Corp Method of and apparatus for connecting pipes in building pipe lines
US2876717A (en) * 1955-10-14 1959-03-10 John J Tetyak Method of inter-sealing and laying pipe joints
US3267682A (en) * 1964-12-21 1966-08-23 Gunther And Shirley Company Method of submarine pipe laying
SE368622B (en) * 1972-11-22 1974-07-08 Falkenbergs Betongind Ab
SE397003B (en) * 1974-12-13 1977-10-10 Alfa Roer Ab DEVICE FOR HANDLING, TESTING AND INSPECTION OF CONCRETE RODS

Also Published As

Publication number Publication date
FI822460L (en) 1982-07-09
DK371482A (en) 1982-08-18
DE3050679A1 (en) 1982-12-16
FI822460A0 (en) 1982-07-09

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