US3006607A - Method and apparatus for introducing lines through conduits - Google Patents

Method and apparatus for introducing lines through conduits Download PDF

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Publication number
US3006607A
US3006607A US848119A US84811959A US3006607A US 3006607 A US3006607 A US 3006607A US 848119 A US848119 A US 848119A US 84811959 A US84811959 A US 84811959A US 3006607 A US3006607 A US 3006607A
Authority
US
United States
Prior art keywords
conduit
line
package
fluid pressure
projectile
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
US848119A
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English (en)
Inventor
James C Hamrick
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.)
Jet Line Products Inc
Original Assignee
Jet Line Products Inc
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 Jet Line Products Inc filed Critical Jet Line Products Inc
Priority to US848119A priority Critical patent/US3006607A/en
Priority to GB32932/60A priority patent/GB885138A/en
Priority to FR840009A priority patent/FR1268872A/fr
Priority to DEJ18910A priority patent/DE1150729B/de
Application granted granted Critical
Publication of US3006607A publication Critical patent/US3006607A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H55/00—Wound packages of filamentary material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
    • H02G1/08—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling
    • H02G1/086—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling using fluid as pulling means, e.g. liquid, pressurised gas or suction means
    • 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
    • F16L2101/00—Uses or applications of pigs or moles
    • F16L2101/40—Separating transported fluids

Definitions

  • This invention relates to a method and apparatus for introducing a guide line through a conduit, the guide line thereafter being connected to a relatively rigid line or similar elongated article-such as an electrical cable or conductor, a lengthy thermosensitive element, etc.- for drawing the relatively rigid line or similar elongated article within the conduit by pulling on the guide line.
  • a relatively rigid line or similar elongated article such as an electrical cable or conductor, a lengthy thermosensitive element, etc.
  • Previous attempts to pass a guide line through a conduit have included the use of fluid pressure to force a projectile through the conduit, the projectile having one end of the guide line attached to its trailing end and the fluid pressure being continuously applied against the rear end of the projectile to thrust it forwardly.
  • the frictional resistance encountered between the projectile, its attached line and the conduit increases markedly as the projectile is thrust through the conduit because of the increasing frictional drag of the line as more of it is pulled into the conduit.
  • the projectile itself is relatively heavy, thereby presenting considerable weight which must be overcome by the fluid pressure before forward movement of the projectile is effected.
  • the improved method contemplates the application of a jet of fluid pressure of a relatively high magnitude against the package to thrust the package rapidly forward, the package thereafter passing through the conduit on its forward momentum built up by the jet of fluid pressure.
  • a continuous application of fluid pressure at a lower magnitude against the package could be employed to blow the package through the conduit.
  • Another object of the present invention is to provide a method and apparatus for introducing a guide line through a conduit which completely eliminates the possibility that the conduit may become permanently blocked by the instrumentality employed as the line carrier.
  • One impressive advantage of the flexible lightweight line package as employed in the present instance over conventional procedures resides in the fact that permanent blockage of the conduit, where a line carrier has become wedged in a constricted portion of the conduit and all etforts to dislodge it have failed, cannot occur. Should the line package become temporarily wedged in the conduit, more line may be removed from the package by pulling on the end extending from the conduit until the wedged condition is relieved.
  • FIGURE 1 is a schematic view showing a conduit extending through a building, wherein a line package is being passed through the conduit in accordance with the present invention
  • FIGURE 2 is a greatly enlarged fragmentary longitudinal sectional view of the line package traveling through the conduit, taken along line 22 in FIGURE 1;
  • FIGURE 3 is a greatly enlarged sectional view of a conduit having an angular bend therein, the line package being shown in elevation as it passes through the bend.
  • FIGURE 1 schematically illustrates the present method and apparatus for introducing a guide line through a conduit.
  • a conduit C extends throughout a building, the conduit C having angular bends therein at various locations along its extent and being interrupted at one or more places for receiving junction boxes I.
  • a line package is employed as the medium for introducinga guide line through the conduit.
  • the line package comprises a casing or wrapping 11 of suitable material, such as paper or plastic, the casing 11 having an elongated substantially cylindrical shape.
  • a supply of pliable line L is wound in an elongated cylindrical roll 12 which fits snugly within the casing 11.
  • the cylindrical roll 12 of line L is preferably wound so that the line L may be unwound from its center outwardly. In this manner, the outer diameter of the line package 10 and substantial frictional engagement between the cylindrical roll 12 and the casing 11 are maintained as the line L is dispensed from the line package 10 as subsequently described.
  • the line package 10 is flexible in nature, such flexibility being enhanced by means in the form of one or more score lines 13 provided in the casing 11 medially of its ends and eachsuch score line 13 serving as a weakened portion on the casing 11.
  • a suitable source of fluid pressure which may be in the form of a portable container 14 of compressed gas preferably having a magnitude of 300 pounds per square inch (as shown in FIGURE 1) communicates with one end of the conduit C by means of flexible tubing 15.
  • suitable means such as a manually operable valve 16.
  • one end of the line L is withdrawn from the cylindrical roll 12 and secured to a point located outside of the conduit C.
  • the line package 10 is then inserted in one end of the conduit C and the flexible tubing 15 is positioned with its outlet end disposed in the .conduit C behind the rear end of the line package 10.
  • the line package 10 Upon opening the valve 16, the line package 10 is subjected to a jet of fluid pressure from the portable container 14. It will be observed that a major portion of the fluid pressure impinges upon the rear end of the line package 10, while a proportionally smaller amount is permitted to pass beyond the line package 10 in the space between the conduit C and the line package 10.
  • the lightweight line package 10 is immediately thrust forward in the conduit C by the impact of the fluid pressure against its rear end.
  • the line package 10 although having an outer diameter which is smaller than the internal diameter of the conduit C, possesses a cross-sectional area which substantially fills the conduit C.
  • the initial forward thrust imparted to the line package 10 by the fluid pressure builds up forward momentum enabling the line package 10 to travel through the conduit C and out of its opposite end.
  • the line L is unwound from the cylindrical roll 12 and payed out in the conduit C. Since the line L is unwound from the center of the cylindrical roll 12 outwardly, the outer diameter of the cylindrical roll 12 is unchanged, thereby maintaining the same cross-sectional dimensions for the line package 10 as it travels through the conduit C.
  • the line package 10 possesses considerable flexibility, this flexibility is enhanced by the one or more score lines 13 located along its longitudinal extent.
  • the outer casing or wrapping 11 of the line package 10 is broken along each score line 13 before the line package 10 is inserted within the conduit C to increase the flexibility of the line package 10, thereby enabling it to better negotiate sharp angular bends in the conduit C, as illustrated in FIGURE 3.
  • crimped places K (FIGURE 3) will be formed thereon by the striking of a rigid object, such as a tool, against the conduit C.
  • the crimp K creates a reduced internal diameter portion for the conduit C where it is located and may seriously impede or actually stop a conventional rigid line-carrying projectile from completing its journey through the conduit C.
  • the highly flexible line package 10 may conform to the crimp .K for passing through the reduced internal diameter portion of the conduit C caused thereby.
  • the crimp K is extremely severe. Under such conditions, a rigid projectile is apt to become hopelessly wedged in the conduit C.
  • the line package 10 while it may be temporarily lodged in the conduit C because of the impediment created by the crimp K, can always be dislodged or removed.
  • an operator may pull on the line L extending from the end of the conduit C through which the line package 10 entered to remove additional line from the cylindrical roll 12.
  • the operator continues to remove line from the cylindrical roll 12 in this manner until the line package 19 can be blown past the impediment by a jet of fluid pressuref Under the Worst possible constricted condition in the conduit C, it may be necessary to withdraw all of the line L from the line package 10 in the manner indicated to remove the line package It from the conduit C.
  • the line package 10 used in the present method cannot became permanently lodged therein.
  • a source of fluid pressure having a relatively high magnitude is capable of thrusting the line package 10 through a relatively long conduit C by directing a jet of such pressure against the rear end of the line package 10, rather than directing a continuous stream of fluid pressure thereagainst.
  • the momentum initially built up in the line package 10 by the sudden impact of the jet of fluid pressure is normally suflicient to thrust the line package 1! completely through the conduit C.
  • the present invention also contemplates the use of a fluid pressure source having a somewhat lesser magnitude in which fluid pressure is continuously applied against the rear end of the line package 10 until it has completed its journey through the conduit C.
  • the lightweight line package 10 is propelled through the conduit C at a high rate of speed, enabling it to jump across interruptions in the conduit C created by junction boxes I.
  • the method of introducing a pliable line through a conduit having at least one angular bend therein comprisrng the steps of directing fluid pressure against a flexible line package having an outer diameter less than the internal diameter of the conduit, blowing the line package freely through the conduit by the fluid pressure, guiding the line package past all angular bends in the conduit by flexing the line package to substantially conform to the shape of each such angular bend as it moves therethrough, and paying out line from the line package in response to the movement of the line package through the conduit.
  • the method of introducing a pliable line through a conduit having at least one angular bend therein comprising the steps of directing a jet of fluid pressure against the rear end of a flexible line package having an outer diameter less than the internal diameter of the conduit to induce rapid forward movement of therline package, passing the line package through the conduit by the forward momentum built up by the jet of fluid pressure, guiding the line package past all angular bends in the conduit by flexing the line package to substantially conform to the shape of each such angular bend at is moves therethrough, and paying out line from the line package in response to the movement of the line package through the conduit.
  • Apparatus for introducing a line through a conduit comprising an elongated line package having a casing with an outer diameter less than the internal diameter of the conduit and a supply of line wound in a cylindrical roll fitting snugly within said casings, said casing and said cylindrical roll of line being flexible throughout their longitudinal extents, a source of fluid pressure, means for directing fluid pressure from said source against said package to propel said package through the conduit, and said line being unwound from the cylindrical roll and payed out in the conduit in response to the movement of said package through the conduit.
  • Apparatus for introducing a line through a conduit comprising an elongated cylindrical line package having a cylindrical casing with an outer diameter less than the internal diameter of the conduit and a supply of line wound in a cylindrical roll fitting snugly within said cylindrical casing, said cylindrical casing and said cylindrical roll of line being flexible throughout their longitudinal extents to provide flexibility for said line package along its entire length, a source of fluid pressure, means for directing fluid pressure from said source against said package to propel said package through the conduit, said line being unwound from the cylindrical roll and payed out in the conduit in response to the movement of said package through the conduit, and said package flexing at any point along its length to conform to irregularities in the conduit for moving therethrough,
  • Apparatus for introducing a line through a conduit comprising an elongated cylindrical line package having an outer diameter less than the internal diameter of the conduit and a supply of line wound in a cylindrical roll fitting snugly therewithin, means on said package providing a weakened portion medially of its ends, a source of fluid pressure, means for directing fluid pressure from said source against said package to propel said package through the conduit, said line being unwound from the cylindrical roll and payed out in the conduit in response to the movement of said package through the conduit and said package bending in the area of said means providing the weakened portion thereon for passing through an angular bend in the conduit.
  • Apparatus for introducing a line through a conduit comprising a supply of line wound in an elongated roll having an outer diameter less than the internal diameter of the conduit, said elongated roll being flexible throughout its longitudinal extent, a source of fluid pressure, means for directing fluid pressure from said source against said elongated roll to propel said elongated roll through the conduit, and said line being unwound from said elongated roll and payed out in the conduit in response to the movement of said elongated roll through the conduit.

Landscapes

  • Electric Cable Installation (AREA)
  • Replacement Of Web Rolls (AREA)
  • Making Paper Articles (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Light Guides In General And Applications Therefor (AREA)
US848119A 1959-10-22 1959-10-22 Method and apparatus for introducing lines through conduits Expired - Lifetime US3006607A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US848119A US3006607A (en) 1959-10-22 1959-10-22 Method and apparatus for introducing lines through conduits
GB32932/60A GB885138A (en) 1959-10-22 1960-09-26 Method of and apparatus for introducing lines through conduits
FR840009A FR1268872A (fr) 1959-10-22 1960-09-30 Procédé et dispositif pour l'introduction de cordons dans des conduits
DEJ18910A DE1150729B (de) 1959-10-22 1960-10-22 Mit Hilfe eines Druckmittels durch ein Rohr vorzutreibender Koerper zum Durchbringen einer Ziehleine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US848119A US3006607A (en) 1959-10-22 1959-10-22 Method and apparatus for introducing lines through conduits

Publications (1)

Publication Number Publication Date
US3006607A true US3006607A (en) 1961-10-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
US848119A Expired - Lifetime US3006607A (en) 1959-10-22 1959-10-22 Method and apparatus for introducing lines through conduits

Country Status (4)

Country Link
US (1) US3006607A (fr)
DE (1) DE1150729B (fr)
FR (1) FR1268872A (fr)
GB (1) GB885138A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119599A (en) * 1960-11-07 1964-01-28 Gen Electric Canada Method for inserting tubular linings or draw-strings into conduits
US3120947A (en) * 1962-03-12 1964-02-11 Jet Line Products Inc Method and apparatus for introducing lines through conduits
US3382859A (en) * 1965-10-19 1968-05-14 Myers Klingman Edward Line-throwing gun
US4077610A (en) * 1976-01-06 1978-03-07 Senichi Masuda Method and apparatus for passing an article through an interior of a pipe
US5374034A (en) * 1993-09-02 1994-12-20 Fast Laing Industries, Inc. Apparatus for installing a line through conduits
US5730424A (en) * 1995-04-14 1998-03-24 Fli Line Tool Corporation Apparatus for sending a line through a conduit
US5762321A (en) * 1992-10-20 1998-06-09 Meab Mobile Equipment Ab Method of inserting cables into tubing
US20070269271A1 (en) * 2007-05-14 2007-11-22 Smith William K Ii High Speed Line Carrier
US7397002B2 (en) 2001-08-24 2008-07-08 Chaps Builders, Inc. Device and method for installation of electrical wiring in conduit
US20160352085A1 (en) * 2014-02-17 2016-12-01 Plumettaz Holding S.A. Method for installing an elongated element into a bended duct
US11196237B2 (en) 2016-08-04 2021-12-07 Plumettaz Holding S.A. Apparatus and method for jetting a cable into a duct
US11237350B2 (en) 2017-02-03 2022-02-01 Plumettaz Holding Sa Autonomous fluid compressor for laying optical fibers in a duct

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES316505A1 (es) * 1965-08-14 1965-12-01 Domenech Forner Manuel Un proceso de montaje de una guia en un conducto tubular
GB2190457B (en) * 1986-05-17 1990-12-19 Stc Plc Hydraulic cable installation system
DE3938387C2 (de) * 1989-11-18 1998-09-10 Rheydt Kabelwerk Ag Verfahren zum Bestücken eines rohrförmigen Aufnahmekörpers mit zumindest einem Lichtwellenleiter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US252956A (en) * 1882-01-31 Laying subterranean conductors
US395881A (en) * 1889-01-08 Patrick citxxingiiam
US1072969A (en) * 1913-04-25 1913-09-09 Benjamin F Mccreary Means for carrying life-lines.
US2470338A (en) * 1947-11-29 1949-05-17 Shell Dev Probe pressure gun
US2822146A (en) * 1954-07-06 1958-02-04 Bell Telephone Canada Cable lashing device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1851435A (en) * 1927-10-22 1932-03-29 Metropolitan Device Corp Threading cables through ducts
US2515953A (en) * 1947-01-08 1950-07-18 Dufresne Joseph Eugene Rodding machine
US2930584A (en) * 1957-07-29 1960-03-29 Jet Line Products Inc Method and apparatus for inserting wires in conduits

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US252956A (en) * 1882-01-31 Laying subterranean conductors
US395881A (en) * 1889-01-08 Patrick citxxingiiam
US1072969A (en) * 1913-04-25 1913-09-09 Benjamin F Mccreary Means for carrying life-lines.
US2470338A (en) * 1947-11-29 1949-05-17 Shell Dev Probe pressure gun
US2822146A (en) * 1954-07-06 1958-02-04 Bell Telephone Canada Cable lashing device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119599A (en) * 1960-11-07 1964-01-28 Gen Electric Canada Method for inserting tubular linings or draw-strings into conduits
US3120947A (en) * 1962-03-12 1964-02-11 Jet Line Products Inc Method and apparatus for introducing lines through conduits
US3382859A (en) * 1965-10-19 1968-05-14 Myers Klingman Edward Line-throwing gun
US4077610A (en) * 1976-01-06 1978-03-07 Senichi Masuda Method and apparatus for passing an article through an interior of a pipe
US5762321A (en) * 1992-10-20 1998-06-09 Meab Mobile Equipment Ab Method of inserting cables into tubing
US5374034A (en) * 1993-09-02 1994-12-20 Fast Laing Industries, Inc. Apparatus for installing a line through conduits
US5730424A (en) * 1995-04-14 1998-03-24 Fli Line Tool Corporation Apparatus for sending a line through a conduit
US7397002B2 (en) 2001-08-24 2008-07-08 Chaps Builders, Inc. Device and method for installation of electrical wiring in conduit
US20070269271A1 (en) * 2007-05-14 2007-11-22 Smith William K Ii High Speed Line Carrier
US20160352085A1 (en) * 2014-02-17 2016-12-01 Plumettaz Holding S.A. Method for installing an elongated element into a bended duct
US10305266B2 (en) * 2014-02-17 2019-05-28 Plumettaz Holding S.A. Method for installing an elongated element into a bended duct
US11196237B2 (en) 2016-08-04 2021-12-07 Plumettaz Holding S.A. Apparatus and method for jetting a cable into a duct
US11237350B2 (en) 2017-02-03 2022-02-01 Plumettaz Holding Sa Autonomous fluid compressor for laying optical fibers in a duct

Also Published As

Publication number Publication date
GB885138A (en) 1961-12-20
DE1150729B (de) 1963-06-27
FR1268872A (fr) 1961-08-04

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