GB2151414A - Apparatus for feeding cable through a conduit - Google Patents

Apparatus for feeding cable through a conduit Download PDF

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Publication number
GB2151414A
GB2151414A GB08333087A GB8333087A GB2151414A GB 2151414 A GB2151414 A GB 2151414A GB 08333087 A GB08333087 A GB 08333087A GB 8333087 A GB8333087 A GB 8333087A GB 2151414 A GB2151414 A GB 2151414A
Authority
GB
United Kingdom
Prior art keywords
conduit
cable
shank
heads
fed
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.)
Granted
Application number
GB08333087A
Other versions
GB2151414B (en
GB8333087D0 (en
Inventor
Chiang-Teng Kao
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
Application filed by Individual filed Critical Individual
Priority to GB08333087A priority Critical patent/GB2151414B/en
Publication of GB8333087D0 publication Critical patent/GB8333087D0/en
Publication of GB2151414A publication Critical patent/GB2151414A/en
Application granted granted Critical
Publication of GB2151414B publication Critical patent/GB2151414B/en
Expired legal-status Critical Current

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Classifications

    • 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

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  • Electric Cable Installation (AREA)

Abstract

Apparatus for feeding cable through a conduit 5 includes a travelling device 1 comprising an elongate resilient shank 105 having at the leading end thereof two spaced frusto conical sealing heads 101, 102. The tail end of the shank 105 is provided with an apertured boss 106 to which the cable 2 to be fed through the conduit is tied. At the extreme end of the shank 105 from the boss 106 is an arcuate leading head 109 for facilitating manoeuvring of the device 1 around bends. The shank 105 and heads 101, 102 are moulded from a heat resisting, lubricous plastics. A frusto conically shaped sealing member 401 is provided to sealingly plug the end of the conduit 5 from which the cable 2 is to be fed from a reel 3. Motive force for driving the device 1 through the conduit 5 is provided by an air gun 4 and compressor such that compressed air is trapped between the heads 101, 102 and the faucet 401 and due to the pressure of air so the device 1 is driven along the conduit 5. <IMAGE>

Description

SPECIFICATION Apparatus for feeding cable through a conduit This invention relates to an apparatus for feeding cable through a conduit.
It is present day practice to eiectrically wire buildings by firstly feeding a draw-through wire along a conduit in which the electric cable is to be located. Once the draw-through wire has been fed through the conduit the electrical cable is tied to one end of the drawthrough wire and by pulling on the wire so the cable is drawn through the conduit. Although attempts have been made to improve the material from which the draw-through wire is manufactured and by fixing a lubricous block to the leading end of the draw-through wire so as to decrease friction between the draw-through wire and the conduit, the resistance produced by a bend in the conduit to movement of the pull through wire is extremely great.In some instances the amount of friction is so great that an electrician has to cut open the wall at the bend of the conduit so as to facilitate feeding of the pull through wire through the conduit or in other instances the draw-through wire is installed in the conduit prior to installation.
It will be realised that such a process is extremely time consuming and therefore expensive.
It is an object of the present invention to provide an apparatus for feeding cable through a conduit which is efficient in use.
According to this invention there is provided an apparatus for feeding cable through a conduit including an elongate resilient shank having a tail end remote from the tail end there being mounted two longitudinally spaced sealing heads, said heads each having an external size which is adapted to sealingly but slidingly engage the inner surface of said conduit, said tail end having means for attaching a cable to be fed through the conduit, a faucet arranged to sealingly plug an end of the conduit from which cable is to be fed, said faucet having an aperture for permitting the cable to be fed therethrough, and fluidic pressure means connected to said faucet, whereby in operation fluid pressure is provided between the faucet and the sealing heads to drive the shank and hence cable along the conduit.
Where the conduit has a circular crosssection, preferably each sealing head is frusto conically shaped the base thereof arranged, in operation, to slidingly seal against the inside of the conduit and with said base facing the tail end of the shank. Advantageously an arcuate leading head is provided at the extreme end of the shank remote from the tail end and preferably the sealing heads are flexible but not deformable.
Conveniently the means for attaching a cable is an apertured boss, the aperture of which is dimensioned to receive the cable therethrough.
In a preferred embodiment the fluidic means is an air compressor, the output of air from which is controlled by an air gun.
Advantageously the shank and sealing heads are formed by injection moulding a heat resisting, lubricous plastics.
The invention will now be described by way of example with reference to the accompanying drawings in which: Figure 1 is a side view of the apparatus in accordance with this invention and including a conduit and a cable supply reel.
Figure 2 shows a perspective view of a part of the apparatus.
Figure 3 shows a sectional side view of the parts shown in Fig. 2.
Figures 4 and 5 respectively show the operation of the apparatus at differing stages in negotiating a bend in a conduit.
In the Figures like reference numerals denote like parts.
The apparatus shown in Figs. 1-3 has a travelling, sealing device 1 to which is connected a cable 2 supplied from a reel 3, the sealing device 1 being driven by an air gun 4 connected to an air compressor (not shown) through a conduit 5.
The travelling, sealing device 1 is made of heat-resisting, lubricous plastics by injection moulding and comprises a resilient shank 105 having an apertured boss 107 at the tail end 106 thereof, and two serially located conical heads 101, 102 at the opposing end of the shank from the tail. The conical heads 101, 102 have their tips 1 03, , 104 respectively round the common shank 105 and the sides of the heads 101 a, 1 02b respectively are flexible but not deformable. Toward the open end of each head 101, 102 is a diverging wall portion 10 1 c, 102d respectively as shown in Fig. 2, which. diverging wall portions are dimensioned to slidingly seal againsts the inside of the conduit 5. At a forward, leading, tip 108 of the shank is a smooth, arcuate leading head 109.At the tail end of the apparatus there is provided a faucet 401 having a hole therein through which cable 2 may be fed from the reel 3 which contains sufficient cable to be fed through the conduit 5. The hole in the faucet 401 is arranged to provide a substantially fluid seal with the cable 2. The faucet 401 is frusto conically shaped to sealing plug the open end of the conduit 5 and the rear portion is bifurcated so as to provide a connection to the air gun 4 and is arranged so that air from the air gun 4 passes through the faucet to the sealing device 1.
In operation a cable is tied to the tail end 106 by passing the cable through the aperture in the boss 107 and the travelling sealing device 1 with the attached cable 2 is put into the conduit 5. The faucet 401 is sealingly plugged into an open end 501 of the conduit 5.
Compressed air is supplied through the control of the air gun 4, is fed through the faucet 401 into the space between the faucet 401 and the heads 101, 102 of the sealing device 1. The heads 101, 102 have the same size and their conical sides 101a, 102b are arranged to be in tight contact with the inner wall of the conduit so that the air fed from the air gun is trapped in the conical cavities formed by the walls 101, 102 so that the air pressure pushes the device 1 along the conduit 5.
Whilst the thrust on the trailing head 102 is sufficient to push the device 1 forward with the cable 2, the leading head 101 is provided to trap the air leaked by the trailing head 102 so that improved performance and speed of operation of the apparatus is obtained. The leading head 109 on the tip 103 of the shaft not only protects the shaft and leading conical head 101 from hitting the conduit wall and being damaged when the device 1 is pushed forwardly by compressed air but the head 109 also promotes the advance of the device 1 since the head 109 is arranged to have a smooth exterior surface and to be condusive to turning a bend as is shown in Figs. 4 and 5.
In Figs. 4 and 5 the apparatus is shown in operation with the faucet 401 sealingly plugged into the feed end of the conduit 5.
Compressed air is applied in the direction shown by arrow-headed line A so as to drive the travelling device 1 in the direction of arrow-headed line B. It will be seen from Fig.
4 that the arcuate end of head 109 facilitates manoeuvring of the device 1 around a bend.
As shown in Fig. 5 the shaft 105 is flexible and air escaping from the diverging wall portion 1 02d, as shown by arrow-headed line C, is trapped by the cavity formed by head 101.
It will now be understood that the apparatus of the present invention facilitates the threading of cable through a conduit in a time-saving fashion and the apparatus has been proven in practice.

Claims (8)

1. Apparatus for feeding cable through a conduit including an elongate resilient shank having a tail end and remote from the tail there being mounted two longitudinally spaced sealing heads, said heads each having an external size which is adapted to sealingly but slidingly engage the inner surface of said conduit, said tail end having means for attach ing a cable to be fed through the conduit, a faucet arranged to sealingly plug an end of the conduit from which cable is to be fed, said fuacet having an aperture for permitting the cable to be fed therethrough and fluidic pressure means connected to said faucet whereby in operation fluid pressure is provided between the faucet and the sealing heads to drive the shank and hence cable along the conduit.
2. Apparatus as claimed in Claim 1 wherein each sealing head is frusto-conically shaped with the base thereof arranged, in operation, to slidingly seal against the inside of the conduit and with said base facing the tail end of the shank.
3. Apparatus as claimed in Claim 1 or 2 wherein an arcuate leading head is provided at the extreme end of the shank remote from the tail end.
4. Apparatus as claimed in any preceding Claim wherein the sealing heads are flexible but not deformable.
5. Apparatus as claimed in any preceding Claim wherein the means for attaching a cable is an apertured boss, the aperture of which is dimensioned to receive the cable therethrough.
6. Apparatus as claimed in any preceding Claim wherein the fluidic pressure means is an air compressor, the output of air from which is controlled by an air gun.
7. Apparatus as claimed in any preceding Claim wherein the shank and the sealing heads are formed by injection moulding a heat resisting lubricous plastics.
8. Apparatus for feeding cable through a conduit substantially as herein described with reference to and as illustrated in the accom panying drawings.
GB08333087A 1983-12-12 1983-12-12 Apparatus for feeding cable through a conduit Expired GB2151414B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08333087A GB2151414B (en) 1983-12-12 1983-12-12 Apparatus for feeding cable through a conduit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08333087A GB2151414B (en) 1983-12-12 1983-12-12 Apparatus for feeding cable through a conduit

Publications (3)

Publication Number Publication Date
GB8333087D0 GB8333087D0 (en) 1984-01-18
GB2151414A true GB2151414A (en) 1985-07-17
GB2151414B GB2151414B (en) 1987-04-23

Family

ID=10553184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08333087A Expired GB2151414B (en) 1983-12-12 1983-12-12 Apparatus for feeding cable through a conduit

Country Status (1)

Country Link
GB (1) GB2151414B (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171218A (en) * 1982-05-06 1986-08-20 Stc Plc Laying cables
DE3606768A1 (en) * 1986-03-01 1987-09-03 Rehau Ag & Co DEVICE FOR PULLING IN CABLES IN CABLE PROTECTIVE PIPES
EP0235560A1 (en) * 1986-01-30 1987-09-09 Mitsubishi Jukogyo Kabushiki Kaisha Cable insert nozzle
GB2190457A (en) * 1986-05-17 1987-11-18 Stc Plc Hydraulic cable installation system
GB2196469A (en) * 1986-10-22 1988-04-27 Wood Group Drilling & Prod Tubular sheathed cable
US4756510A (en) * 1986-08-11 1988-07-12 Atlantic Richfield Company Method and system for installing fiber optic cable and the like in fluid transmission pipelines
GB2205916A (en) * 1987-06-04 1988-12-21 British Pipeline Agency Pipeline systems
FR2623665A1 (en) * 1987-11-20 1989-05-26 Baldechi Sauro PNEUMATIC DEPRESSION METHOD FOR PULLING CABLES IN SHEATHINGS AND DEVICE FOR IMPLEMENTING SAME
EP0388475A1 (en) * 1988-09-27 1990-09-26 Shuwa Kogyo Kabushiki Kaisha Apparatus for introducing wire-towing rope and apparatus for draining the pipe when the wire-towing rope is introduced
EP0427354A2 (en) 1987-04-28 1991-05-15 Koninklijke KPN N.V. Apparatus for introducing a cable into a cable guide tube
EP0645860A1 (en) * 1993-09-27 1995-03-29 France Telecom Valve for regenerating air flow for drawing a telecommunication cable into a burried conduit
WO1997042691A1 (en) * 1996-05-07 1997-11-13 Pneumatic Systems International Pty. Ltd. Shuttle for use in insertion of a draw line into a conduit
WO1998026207A1 (en) * 1996-12-13 1998-06-18 Polyline Technologies Limited Lining pipes
FR2775136A1 (en) * 1998-02-13 1999-08-20 France Telecom General purpose pneumatic draw-wire insertion into cable guides for installation of telecommunication cables
AU738302B2 (en) * 1996-05-07 2001-09-13 Pneumatic Systems International Pty Ltd Shuttle for use in insertion of a draw line into a conduit
WO2002093706A1 (en) * 2001-05-11 2002-11-21 Louis Dreyfus Communications Method and device for inserting a cable into a sheath
GB2408391A (en) * 2003-11-18 2005-05-25 Wood Group Logging Services In Fibre optic deployment in a wellbore
US7357021B2 (en) 2004-04-08 2008-04-15 Welldynamics, Inc. Methods of monitoring downhole conditions
ITMI20121814A1 (en) * 2012-10-25 2014-04-26 Sb Lab Sa SHUTTLE TO TRAVEL DUCTS AND KIT FOR LAYING A GUIDE WIRE IN DUCTS OF HIGH LENGTH
ITMI20121813A1 (en) * 2012-10-25 2014-04-26 Sb Lab Sa CLOSING DEVICE OF A DUCT AND KIT FOR LAYING A GUIDE WIRE IN DUCTS OF HIGH LENGTH
ITBO20120589A1 (en) * 2012-10-26 2014-04-27 Comecer Spa METHOD AND DEVICE TO INSERT A CAPILLARY IN A CONNECTION TUBE BETWEEN FLUID DRUGS WORKING ENVIRONMENTS OF A PLANT FOR THE PRODUCTION AND / OR HANDLING OF FLUID DRUGS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114233046B (en) * 2021-12-21 2023-07-21 中交二航局成都城市建设工程有限公司 Method for dismantling wall body between main body structure and auxiliary structure of subway station

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171218A (en) * 1982-05-06 1986-08-20 Stc Plc Laying cables
EP0235560A1 (en) * 1986-01-30 1987-09-09 Mitsubishi Jukogyo Kabushiki Kaisha Cable insert nozzle
EP0239733A3 (en) * 1986-03-01 1990-01-03 REHAU AG + Co Device for pulling cables into cable-protecting pipes
DE3606768A1 (en) * 1986-03-01 1987-09-03 Rehau Ag & Co DEVICE FOR PULLING IN CABLES IN CABLE PROTECTIVE PIPES
EP0239733A2 (en) * 1986-03-01 1987-10-07 REHAU AG + Co Device for pulling cables into cable-protecting pipes
GB2190457B (en) * 1986-05-17 1990-12-19 Stc Plc Hydraulic cable installation system
GB2190457A (en) * 1986-05-17 1987-11-18 Stc Plc Hydraulic cable installation system
US4756510A (en) * 1986-08-11 1988-07-12 Atlantic Richfield Company Method and system for installing fiber optic cable and the like in fluid transmission pipelines
GB2196469A (en) * 1986-10-22 1988-04-27 Wood Group Drilling & Prod Tubular sheathed cable
EP0427354B2 (en) † 1987-04-28 1998-09-09 Koninklijke KPN N.V. Apparatus for introducing a cable into a cable guide tube
EP0427354A2 (en) 1987-04-28 1991-05-15 Koninklijke KPN N.V. Apparatus for introducing a cable into a cable guide tube
GB2205916A (en) * 1987-06-04 1988-12-21 British Pipeline Agency Pipeline systems
GB2205916B (en) * 1987-06-04 1991-04-17 British Pipeline Agency Pipeline systems
FR2623665A1 (en) * 1987-11-20 1989-05-26 Baldechi Sauro PNEUMATIC DEPRESSION METHOD FOR PULLING CABLES IN SHEATHINGS AND DEVICE FOR IMPLEMENTING SAME
EP0325882A1 (en) * 1987-11-20 1989-08-02 Sauro Serge Baldecchi Device for carrying out a process with pneumatic depression allowing the pulling of conductive cables in the sheaths
EP0388475A1 (en) * 1988-09-27 1990-09-26 Shuwa Kogyo Kabushiki Kaisha Apparatus for introducing wire-towing rope and apparatus for draining the pipe when the wire-towing rope is introduced
EP0388475A4 (en) * 1988-09-27 1991-01-30 Shuwa Kogyo Kabushiki Kaisha Apparatus for introducing wire-towing rope and apparatus for draining the pipe when the wire-towing rope is introduced
EP0645860A1 (en) * 1993-09-27 1995-03-29 France Telecom Valve for regenerating air flow for drawing a telecommunication cable into a burried conduit
FR2710789A1 (en) * 1993-09-27 1995-04-07 Pecot Alain Valve for the regeneration of the driving air flow of a telecommunications cable in a buried pipe.
WO1997042691A1 (en) * 1996-05-07 1997-11-13 Pneumatic Systems International Pty. Ltd. Shuttle for use in insertion of a draw line into a conduit
AU738302B2 (en) * 1996-05-07 2001-09-13 Pneumatic Systems International Pty Ltd Shuttle for use in insertion of a draw line into a conduit
WO1998026207A1 (en) * 1996-12-13 1998-06-18 Polyline Technologies Limited Lining pipes
GB2335249A (en) * 1996-12-13 1999-09-15 Polyline Technologies Ltd Lining pipes
GB2335249B (en) * 1996-12-13 2001-02-14 Polyline Technologies Ltd Lining pipes
FR2775136A1 (en) * 1998-02-13 1999-08-20 France Telecom General purpose pneumatic draw-wire insertion into cable guides for installation of telecommunication cables
WO2002093706A1 (en) * 2001-05-11 2002-11-21 Louis Dreyfus Communications Method and device for inserting a cable into a sheath
GB2408391A (en) * 2003-11-18 2005-05-25 Wood Group Logging Services In Fibre optic deployment in a wellbore
GB2408391B (en) * 2003-11-18 2007-01-17 Wood Group Logging Services In Fiber optic deployment in a wellbore
US7322421B2 (en) 2003-11-18 2008-01-29 Welldynamics Inc. Fiber optic deployment apparatus and method
US7357021B2 (en) 2004-04-08 2008-04-15 Welldynamics, Inc. Methods of monitoring downhole conditions
ITMI20121814A1 (en) * 2012-10-25 2014-04-26 Sb Lab Sa SHUTTLE TO TRAVEL DUCTS AND KIT FOR LAYING A GUIDE WIRE IN DUCTS OF HIGH LENGTH
ITMI20121813A1 (en) * 2012-10-25 2014-04-26 Sb Lab Sa CLOSING DEVICE OF A DUCT AND KIT FOR LAYING A GUIDE WIRE IN DUCTS OF HIGH LENGTH
EP2725669A1 (en) * 2012-10-25 2014-04-30 Sb-Lab S.A. Closing device for a conduit and kit for laying a dragging rope into high length conduits
EP2725668A1 (en) * 2012-10-25 2014-04-30 Sb-Lab S.A. Shuttle for treading ducts and kit for laying a dragging wire into high length conduit
ITBO20120589A1 (en) * 2012-10-26 2014-04-27 Comecer Spa METHOD AND DEVICE TO INSERT A CAPILLARY IN A CONNECTION TUBE BETWEEN FLUID DRUGS WORKING ENVIRONMENTS OF A PLANT FOR THE PRODUCTION AND / OR HANDLING OF FLUID DRUGS

Also Published As

Publication number Publication date
GB2151414B (en) 1987-04-23
GB8333087D0 (en) 1984-01-18

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Legal Events

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PCNP Patent ceased through non-payment of renewal fee