WO2002061326A1 - Method for gravity pipeline refurbishment and installation to apply the method - Google Patents

Method for gravity pipeline refurbishment and installation to apply the method Download PDF

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Publication number
WO2002061326A1
WO2002061326A1 PCT/PL2002/000004 PL0200004W WO02061326A1 WO 2002061326 A1 WO2002061326 A1 WO 2002061326A1 PL 0200004 W PL0200004 W PL 0200004W WO 02061326 A1 WO02061326 A1 WO 02061326A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
unit
hoisting winch
pipeline
starting trough
Prior art date
Application number
PCT/PL2002/000004
Other languages
French (fr)
Inventor
Andrzej Roszkowski
Cezary Willimowski
Original Assignee
Pphu Wir S.C.
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 Pphu Wir S.C. filed Critical Pphu Wir S.C.
Priority to EP02710588A priority Critical patent/EP1409915A1/en
Publication of WO2002061326A1 publication Critical patent/WO2002061326A1/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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1657—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section lengths of rigid pipe being inserted

Definitions

  • hydraulic servomotors are provided to be used for shifting of the segments connected.
  • the method to be applied in accordance with the present invention consists ki the addition of a next pipe unit in the starting trough, which is connected to the first one after having fixed a pilot head thereon and after having immobilized the first unit with the aid of an interlock mechanism by winding a cable around the winding drum of a hoisting winch—the cable is caught at the end of the unit initially placed in the starting trough— and after having connected the units, the new pipeline section installed so far is shifted then with the aid of the cable towards the inside of the pipeline section being refurbished, and the interlock mechanism is automatically released when the next unit added has been totally connected to the preceding one and the cable run force has increased up to the level of the releasing force specified previously, and the cable end makes a reciprocating motion, whose dead centres are controlled by the limit switches coordinated with the unit location in the starting trough and the initial position of the hoisting winch cable.
  • Installation for gravity pipeline refurbishment has a starting trough provided with an interlock mechanism to be automatically released when the unit added has been connected to the preceding one, and the pipe unit has a circumferential groove of a trapezoid section on its outside surface and it has grooves at its bare end provided for sealing rings located on its cylindrical central part, but its endmost parts are of conical shape of small convergence, and the end of the hoisting winch cable is fastened at the end of the pipe unit added by means of a dog, and the hoisting winch and the starting trough are provided with limit switches.
  • Fig. 1 shows the complete installation
  • Fig. 2 shows an axial section of the pipe unit.
  • the method to be applied in accordance with the present invention is characterized by a high capacity. No earth work is necessary to carry out the refurbishment applying the said method, and low costs are required to refurbish gravity pipeline applying this method.
  • a starting trough (3) is placed at the bottom of the sink basin (S) in the pipeline section (K) being refurbished.
  • the connection of the following pipe units (1) and (2) is made in the trough.
  • the next unit (2) is inserted into the starting trough (3).
  • the cable (6) tightened around the winding drum of the hoisting winch (7) is used, and the cable (6) is caught at the end of the unit (2) placed initially in the starting trough (3). This operation is repeated for every unit inserted into the starting trough (3).
  • the first unit located at the beginning of the pipeline installed is provided with a pilot head (5).
  • Installation for refurbishment has a hoisting winch (7) placed upon the surface by the sink basin (R).
  • the cable (6) reeled around the dram of the hoisting winch, comes through the handlebar (9) and the roller (10) and is connected to the next unit inserted into the starting trough (3) by means of the dog (8).
  • the trough has an interlock mechanism (4) to block shifting of the unit until it is connected to the next unit added. This mechanism is unblocked automatically when the connection is completed, i.e. when the force in the cable (6) reaches the value of the force to release the mechanism (4) ⁇ the said force is bigger than the force required to connect both units.
  • the pipe unit (1) has a circumferential groove (1') of trapezoid section at one of its ends. This groove mates with the interlock mechanism (4). On the other end, so-called bare end on its cylindrical central part there are circumferential grooves (1") provided for sealing rings, whereas the endmost parts on both sides of the grooves are conical of small convergence.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Sewage (AREA)

Abstract

The method for gravity pipeline refurbishment consists in the addition of a next pipe unit (2) in the starting trough (3), which is connected to the first one (1) after having fixed a pilot head (5) thereon and after having immobilized the first unit (1) with the aid of an interlock mechanism (4) by winding a cable (6) around the winding drum of a hoisting winch (7)-- the cable is caught at the end of the unit (2) initially placed in the starting trough (3)-- and after having connected the units (1) and (2), the new pipeline section installed so far is shifted then with the aid of the cable (6) towards the inside of the pipeline section being refurbished. Installation for gravity pipeline refurbishment has a starting trough (3) provided with an interlock mechanism (4) to be automatically released when the unit (2) added has been connected to the preceding one (1), and the pipe unit (1) has a circumferential groove (1') of a trapezoid section on its outside surface and it has grooves (1'') at its bare end provided for sealing rings located on its cylindrical central part, but its endmost parts of conical shape of small convergence, and the end of the the hoisting winch (7) cable (6) is fastened at the end of the pipe unit (2) added by means of a dog (8), and the hoisting winch (7) and the starting trough (3) are provided with the limit switches, respectively (11) and (12).

Description

Method for gravity pipeline refurbishment and installation to apply the method
It is an object of the present invention to provide a method of gravity pipeline refurbishment and the installation to apply the method.
The method of gravity pipeline refurbisliment is well-known, in which consecutive units are inserted into the inside of the pipeline section being refurbished by means of hydraulic servomotors of remotely-controlled robots.
In the well-known installations for gravity pipeline refurbishment, e.g. the one by Swedish company Nordisk Na-Technik AB, hydraulic servomotors are provided to be used for shifting of the segments connected.
The method to be applied in accordance with the present invention consists ki the addition of a next pipe unit in the starting trough, which is connected to the first one after having fixed a pilot head thereon and after having immobilized the first unit with the aid of an interlock mechanism by winding a cable around the winding drum of a hoisting winch—the cable is caught at the end of the unit initially placed in the starting trough— and after having connected the units, the new pipeline section installed so far is shifted then with the aid of the cable towards the inside of the pipeline section being refurbished, and the interlock mechanism is automatically released when the next unit added has been totally connected to the preceding one and the cable run force has increased up to the level of the releasing force specified previously, and the cable end makes a reciprocating motion, whose dead centres are controlled by the limit switches coordinated with the unit location in the starting trough and the initial position of the hoisting winch cable.
Installation for gravity pipeline refurbishment has a starting trough provided with an interlock mechanism to be automatically released when the unit added has been connected to the preceding one, and the pipe unit has a circumferential groove of a trapezoid section on its outside surface and it has grooves at its bare end provided for sealing rings located on its cylindrical central part, but its endmost parts are of conical shape of small convergence, and the end of the hoisting winch cable is fastened at the end of the pipe unit added by means of a dog, and the hoisting winch and the starting trough are provided with limit switches.
Installation to apply the method was presented using the execution example as a schematic diagram where Fig. 1 shows the complete installation, Fig. 2 shows an axial section of the pipe unit.
The method to be applied in accordance with the present invention is characterized by a high capacity. No earth work is necessary to carry out the refurbishment applying the said method, and low costs are required to refurbish gravity pipeline applying this method.
A starting trough (3) is placed at the bottom of the sink basin (S) in the pipeline section (K) being refurbished. The connection of the following pipe units (1) and (2) is made in the trough. After the locking of the first unit inserted by means of the interlock mechanism (4), the next unit (2) is inserted into the starting trough (3). In order to connect both units, the cable (6) tightened around the winding drum of the hoisting winch (7) is used, and the cable (6) is caught at the end of the unit (2) placed initially in the starting trough (3). This operation is repeated for every unit inserted into the starting trough (3). The first unit located at the beginning of the pipeline installed is provided with a pilot head (5).
If an obstacle is encountered while shifting pipe segments previously connected, which hinders to carry on the work, it is the pilot head (5) to enable a surmounting of the obstacle.
Installation for refurbishment has a hoisting winch (7) placed upon the surface by the sink basin (R). The cable (6), reeled around the dram of the hoisting winch, comes through the handlebar (9) and the roller (10) and is connected to the next unit inserted into the starting trough (3) by means of the dog (8). The trough has an interlock mechanism (4) to block shifting of the unit until it is connected to the next unit added. This mechanism is unblocked automatically when the connection is completed, i.e. when the force in the cable (6) reaches the value of the force to release the mechanism (4)~the said force is bigger than the force required to connect both units. There is a limit switch (11) on the hoisting winch (7), which stops the cable (6) being unwound, and there is the other limit switch (12) on the starting trough (3), which stops the reeling process of the cable (6). The pipe unit (1) has a circumferential groove (1') of trapezoid section at one of its ends. This groove mates with the interlock mechanism (4). On the other end, so-called bare end on its cylindrical central part there are circumferential grooves (1") provided for sealing rings, whereas the endmost parts on both sides of the grooves are conical of small convergence.
After the installation work, the pipe units set up the gravity pipeline section refurbished.

Claims

Claims
1. The method for gravity pipeline refurbishment, in which a new pipeline mounted of pipe units mutually connected inside the chamber (sink basin) or other working space situated at the beginning of the pipeline section being refurbished is inserted into the inside of the pipeline being refurbished, characterized in that the addition of a next pipe unit (2)is made in the starting trough (3), which is connected to the first one (1) after having fixed a pilot head (5) thereon and after having immobilized the first unit (1) with the aid of an interlock mechanism (4) by winding a cable (6) around the winding dram of a hoisting winch (7)~the cable is caught at the end of the unit (2) initially placed in the starting trough (3)—and after having connected the units (1) and (2), the new pipeline section installed so far is shifted then with the aid of the cable (6) towards the inside of the pipeline section being refurbished, and the interlock mechanism (4) is automatically released when the next unit (2) added has been totally connected to the preceding one (1) and the cable (6) run force has increased up to the level of the releasing force specified previously, and the cable (6) end makes a reciprocating motion, whose dead centres are controlled by the limit switches coordinated with the unit location in the starting trough (3) and the initial position of the hoisting winch (7) cable (6).
2. Installation for gravity pipeline refurbishment consisting of a hoisting winch, a handlebar, H it switches and pipe units, characterized in that it has a starting trough (3) provided with an interlock mechanism (4) to be automatically released when the unit (2) added has been connected to the preceding one (1), and the pipe unit (1) has a circumferential groove (1') of a trapezoid section on its outside surface and it has grooves (1") at its bare end provided for sealing rings located on its cylindrical central part, but its endmost parts are of conical shape of small convergence, and the end of the hoisting winch (7) cable (6) is fastened at the end of the pipe unit (2) added by means of a dog (8), and the hoisting winch (7) and the starting trough (3) are provided with the limit switches, respectively (11) and (12).
PCT/PL2002/000004 2001-01-30 2002-01-24 Method for gravity pipeline refurbishment and installation to apply the method WO2002061326A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02710588A EP1409915A1 (en) 2001-01-30 2002-01-24 Method for gravity pipeline refurbishment and installation to apply the method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL01345496A PL188784B1 (en) 2001-01-30 2001-01-30 Method of renovating gravity-flow pipelines and apparatus for bringing this method into effect
PLP-345496 2001-01-30

Publications (1)

Publication Number Publication Date
WO2002061326A1 true WO2002061326A1 (en) 2002-08-08

Family

ID=20078294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2002/000004 WO2002061326A1 (en) 2001-01-30 2002-01-24 Method for gravity pipeline refurbishment and installation to apply the method

Country Status (3)

Country Link
EP (1) EP1409915A1 (en)
PL (1) PL188784B1 (en)
WO (1) WO2002061326A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2079805A (en) * 1980-07-05 1982-01-27 Demco Ltd Lining underground conduits
CH684546A5 (en) * 1992-01-29 1994-10-14 Eisenhut Max Ag Pipe for the pipe-in-pipe repair of pipelines, and process for installing said pipe, and apparatus for carrying out the process
US5711636A (en) * 1995-10-24 1998-01-27 Boyer, Inc. System for lining a pipe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2079805A (en) * 1980-07-05 1982-01-27 Demco Ltd Lining underground conduits
CH684546A5 (en) * 1992-01-29 1994-10-14 Eisenhut Max Ag Pipe for the pipe-in-pipe repair of pipelines, and process for installing said pipe, and apparatus for carrying out the process
US5711636A (en) * 1995-10-24 1998-01-27 Boyer, Inc. System for lining a pipe

Also Published As

Publication number Publication date
EP1409915A1 (en) 2004-04-21
PL188784B1 (en) 2005-04-29

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