US20010019122A1 - Method for drawing cables into cable channels or pipes - Google Patents
Method for drawing cables into cable channels or pipes Download PDFInfo
- Publication number
- US20010019122A1 US20010019122A1 US09/776,587 US77658701A US2001019122A1 US 20010019122 A1 US20010019122 A1 US 20010019122A1 US 77658701 A US77658701 A US 77658701A US 2001019122 A1 US2001019122 A1 US 2001019122A1
- Authority
- US
- United States
- Prior art keywords
- cable
- tensile
- yarn
- skin
- yarn skin
- 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
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
- G02B6/502—Installation methods in fluid conducts, e.g. pipelines
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
-
- 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
-
- 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
- H02G1/081—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 pulling means at cable ends, e.g. pulling eyes or anchors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49838—Assembling or joining by stringing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53526—Running-length work
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53696—Means to string
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ropes Or Cables (AREA)
- Insulated Conductors (AREA)
Abstract
Description
- The present invention is directed to a method for drawing cables which inherently do not have tensile strength, particularly light waveguide cables, into cable channels or cable pipes. The invention is also directed to the application of this method for connecting a cable at a terminal tower to an exchange via an overhead line.
- Dependent on the conditions of stress to which the cables are subjected in the field, light waveguide cables and electrical cables as well are either an armored and/or tensile cable or a lightly built cable having a low tensile strength. The cables with low tensile strength are employed when the cables can be combined and used with another cable, for example a carrying cable.
- Armored and/or tensile cables have the required tensile strength, so that they can be drawn into cable channels or pipes. One application of such a cable is the connection of a light waveguide cable incoming at a terminal tower of an overhead line to an exchange arranged at the terminal tower. The cable is thereby usually pulled through the cable channels or pipes, so that it must have a tensile strength that is adequate for this assembly purpose.
- One example of light waveguide cables or LWG cables which do not have tensile strength in and of themselves is what is referred to as an LWG shackle cable. An LWG shackle cable usually is about 5 mm thick and is an all dielectric-like waveguide cable or AD-LWG cable that can be shackled to a guard wire or phase wire of an overhead line by a shackle band. The shackle band is wrapped around both the guard wire as well as around the light waveguide cable. Obviously, the light waveguide cable does not require any particular tensile strength for this application.
- In practice, however, there are cases wherein one can manage with a lightly constructed, unarmored cable over by far the greater part of a distance that must be bridged by the cable. The cable that has an adequate tensile strength is needed on short intermediate or final paths. In these instances, the cables were previously cut off and a tensile cable was attached with the assistance of a fitting. After bridging the distance that required the tensile cable, a switch was made back to the inherently non-tensile strength cable via fitting. This is more economical than using an armored or tensile cable for the entire length of the cable, because of the lighter structure.
- An example of such a situation is the connection of an AD-LWG cable that arrives at a terminal tower of an overhead line and is connected to an exchange. Up to now, the cable ends of the AD-LWG cable were guided into a fitting at a terminal tower, and an armored and/or tensile cable leads into the exchange therefrom, whereby the length of this connection usually amounts to between 10 m to 300 m. Specific, expensive, short cable lengths must then be fabricated for this connection between terminal tower and exchange, and this is expensive and involved because it is always only short pieces that can or must be produced. On the other hand, the lack of tensile strength on the part of the AD-LWG cable does not allow this cable to be drawn directly through cable channels or pipes from the terminal tower up to the exchange.
- The invention is based on the object of offering a method for drawing cables which do not have tensile strength in and of themselves into cable channels or cable pipes and an application of this method to the connection between terminal towers and exchanges that makes the fabrication of specific, expensive, short lengths of armored cable for short distance connections of this type unnecessary.
- To accomplish this object, the method is directed to providing a tensile yarn skin to an end of the cable, and then drawing the end of the cable having the tensile yarn skin into a cable channel or cable pipe. The connecting cable incoming at a terminal tower to a switching center can be connected to a cable having the yarn skin, which is applied for the distance that is necessary for being pulled through the various channels or cable pipes.
- In accordance with the present invention, a method for drawing cables that inherently have no tensile strength, particularly LWG cables, into cable channels or cable pipes is characterized in that the cable is provided with a tensile yarn skin before being drawn into the pipe or channel. The cable that is unsuitable for higher drawing forces is strengthened by applying the tensile yarn skin so that the cable can be pulled through cable channels or cable pipes from the terminal tower without having to employ special cables for this purpose. It has been shown that a simple tensile yarn skin suffices for this specific purpose, which is the pulling of the cable through a cable channel or a cable pipe over a short distance for a single time.
- An advantageous development of the invention is that the tensile yarn skin is applied at the assembly location. It becomes possible to strengthen the incoming cable and introduce it into the cable channel or pipe without interruption and interposition of a fitting.
- An advantageous development of the invention is that the net hose is pulled onto the cable as the tensile yarn skin. This yarn skin can be advantageously implemented by a simple mechanism without rotating parts, whereby the supply of the net hose in the mechanism is adequate for the short lengths that are planned.
- Another advantageous development of the invention is that an annular receptacle device is employed for a net hose supply. The cable is pulled through the receptacle device and the net hose is thereby taken down from the receptacle device and pulled onto the cable. The cable can, thus, be strengthened in a simple way, and it is advantageously possible to always keep the required supply of net hose on hand for the cable lengths to be fabricated.
- Another advantageous development of the invention is that a yarn is spun around the cable as a tensile yarn skin. By applying spinning technology, it is advantageously no longer necessary to set the supply of material for the yarn skin to the cable length to be strengthened, since the spin-wrap can be ended at any time.
- Another advantageous development of the invention is that a known yarn spinner or yarn twister is employed for the spin-wrapping of the cable. This is a proven technology that meets the task envisioned here.
- Another advantageous development of the invention is that the net hose or, respectively, spin-wrap is fixed by a tensile cable cap at the end of the cable. What is thereby advantageously achieved is that the yarn skin fulfills its purpose when the cable is drawn in and does not slip off from the cable.
- Another advantageous development of the invention is that a fiber selected from Kevlar fibers and glass fibers are employed as the yarn skin. It is thereby advantageously a matter of fibers that produce the desired tensile strength without further ado.
- The solution of the task also comprises the application of the above-characterized method for connecting a cable incoming at a terminal tower to a switching center or exchange. Here, the yarn skin is applied on this distance between the tower and center. This application is especially advantageous insofar as expensive, short lengths of armored and/or tensile cable have had to be previously employed in this application.
- Another advantageous development of the above-mentioned method is that the cable is conducted down from the terminal tower, strengthened and pulled in without interruption or use of any fitting. This solution is advantageous when the distance between the terminal tower and the exchange is comparatively short, so that the cable coming from the terminal tower can be laid in a ring, strengthened and then drawn into the exchange.
- Another advantageous development of the above-mentioned application is that the cable incoming at the terminal tower is guided into a fitting and connected to a cable of the same type that is reinforced with the tensile yarn skin and is kept on hand on a cable drum. The connection in the fitting occurs after the reinforced cable is drawn into the cable channel or cable pipe. This solution is advantageous when the distance between the terminal tower and the exchange is greater because practically any arbitrary length for the reinforced cable is then available on the cable drum for the connection between the terminal tower and the exchange. The subsequent connection of the strengthened cable with the fitting at the terminal tower is advantageous because the short length net hose need not be unwound in advance in this case before it is drawn into the cable channel or pipe.
- Finally, another advantageous development of the invention is characterized in that the light waveguide shackle cable is employed as the cable. When laying such a cable, the inventive method is especially advantageous with respect to handling and cost savings.
- Other advantages and features of the invention will be readily apparent from the following description of the preferred embodiments, the drawings and claims.
- FIG. 1 is a first exemplary embodiment of a mechanism for placing a tensile yarn skin on a cable to strengthen the cable; and
- FIG. 2 is a second embodiment for forming a tensile yarn skin on a cable and, thus, strengthening the cable.
- The principles of the present invention are particularly useful when incorporated in an arrangement illustrated in FIG. 1, which comprises a
cable drum 4 rotatably seated on arack 2 on which a light waveguide cable 6 is wound. The cable 6 may be an all dielectric light waveguide cable, which is known as an AD-LWG cable. The light waveguide cable 6 is now to be drawn into acable channel 8, which lies in acable shaft 10 with the direction of drawing being indicated by the arrow R. To this end, areceptacle device 12, on which asupply 14 oftensile yarn hose 16 is stored, is provided between thecable drum 4 and thecable channel 8. Thereceptacle device 12 is annularly fashioned and divisible, so that the receptacle device can be removed in a simple way after the end of the strengthening of the cable. - For drawing the cable6 into the
cable channel 8, the end of the cable is first inserted through acentral opening 18 of thereceptacle device 12, and the end of the cable 6 and theyarn hose 16 are then connected to one another by acable cap 20 and the cable with theyarn hose 16 is then drawn into thechannel 8. - In an arrangement according to FIG. 2, a
cable drum 34 is rotatably mounted on arack 32 on which thelight waveguide cable 36 is wound. Thecable 36 is now to be drawn into acable channel 38 in the direction of the arrow R. To that end, a twister or, respectively,spinner 42, on which a yarn supply is stored, is provided between thecable drum 34 and thecable channel 38. - Given the arrangement of FIG. 2, the
cable 36 is conducted through thespinner 42, which includes twopressure rollers cable 36 in order to drive thespinner 42. The spinner also supports twoyarn spools rack 52 and are driven by thepressure rollers gears 54 so that they turn around the cable in opposite rotational sense in order to spin around thecable 36. Before thecable 36 is drawn in, a spin-wrap 56 is connected to the cable with acable cap 58. - In the two embodiments, a respective cable was employed. Applications are involved wherein the cable length to be strengthened is comparatively great. When the cable length is smaller and can be laid down as a ring before being drawn in, the cable drum can be omitted, since the cable coming from the tower can then be drawn into the cable channel without interruption.
- In the above specification, the LWG shackle cables were particularly referred to. The invention, however, is not limited to this cable type, but, for example, can be applied to electrical cables, wherein the strength relationships are similar to those given with LWG cables.
- Although various minor modifications may be suggested by those versed in the art, it should be understood that we wish to embody within the scope of the patent granted hereon all such modifications as reasonably and properly come within the scope of our contribution to the art.
Claims (13)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10004992A DE10004992A1 (en) | 2000-02-04 | 2000-02-04 | Drawing cables into channels or pipes involves providing cable with textile covering before drawing cable in; covering can be applied at installation point as mesh tube pulled onto cable |
DE10004992.3 | 2000-02-04 | ||
DE10004992 | 2000-02-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010019122A1 true US20010019122A1 (en) | 2001-09-06 |
US6402122B2 US6402122B2 (en) | 2002-06-11 |
Family
ID=7629866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/776,587 Expired - Fee Related US6402122B2 (en) | 2000-02-04 | 2001-02-02 | Method for drawing cables into cable channels or pipes |
Country Status (3)
Country | Link |
---|---|
US (1) | US6402122B2 (en) |
EP (1) | EP1122843A1 (en) |
DE (1) | DE10004992A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100102286A1 (en) * | 2008-10-23 | 2010-04-29 | David Jordan | Pulling jacket for use while installing wires in conduit |
WO2011067425A1 (en) * | 2009-12-03 | 2011-06-09 | Citynet España, S.A. | Method for deploying optical fibre networks in underground piping networks |
US20140353561A1 (en) * | 2013-05-31 | 2014-12-04 | Verizon Patent And Licensing Inc. | System and method for guiding a cable |
CN107658677A (en) * | 2017-08-30 | 2018-02-02 | 台州浩然机械制造有限公司 | A kind of wire stripper and wire stripping chopping method |
CN113031185A (en) * | 2021-04-06 | 2021-06-25 | 商丘工学院 | End traction device for erecting communication engineering optical cable |
US20210349280A1 (en) * | 2018-10-04 | 2021-11-11 | Fujikura Ltd. | Optical fiber protective unit and method for protecting optical fiber |
US20210351578A1 (en) * | 2020-05-05 | 2021-11-11 | Christopher Kaleshnik | Apparatus and method for installing wire behind existing walls |
US11967806B2 (en) * | 2020-05-05 | 2024-04-23 | Promethean Innovations, Llc | Apparatus and method for installing wire behind existing walls |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10145611A1 (en) * | 2001-09-15 | 2003-04-10 | Ccs Technology Inc | Device for laying cables, especially optical waveguide cables, has strain relieving device that encloses cable while laying cable and that is removed from cable after it has been laid |
WO2005016692A2 (en) * | 2003-07-03 | 2005-02-24 | Chief Environmental Services I | Apparatus and method for inspecting sewer lines using small mobile vehicles |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4368910A (en) * | 1980-12-08 | 1983-01-18 | Harvey Hubbell Incorporated | Grip for pulling fiber optic cable and method of inserting the cable into the grip |
DE3238054A1 (en) * | 1982-10-14 | 1984-04-19 | kabelmetal electro GmbH, 3000 Hannover | Method and device for laying pipes underground |
US5038663A (en) * | 1983-09-16 | 1991-08-13 | Plummer Walter A | Braided sleeving with pull cord |
DE3418100A1 (en) * | 1984-05-16 | 1985-11-21 | Albert 4270 Dorsten Stewing | Cable drawing device |
DE8704035U1 (en) * | 1987-03-18 | 1987-04-30 | Peter Lancier Maschinenbau-Hafenhuette Gmbh & Co Kg, 4400 Muenster, De | |
DE8709907U1 (en) * | 1987-07-18 | 1987-09-10 | Kumpf, Geb. Loritz, Ursula, 7300 Esslingen, De | |
GB9514204D0 (en) * | 1995-07-12 | 1995-09-13 | Mainetti Uk Ltd | Method of installing an optical fibre unit in a tube |
-
2000
- 2000-02-04 DE DE10004992A patent/DE10004992A1/en not_active Withdrawn
- 2000-12-18 EP EP20000127689 patent/EP1122843A1/en not_active Withdrawn
-
2001
- 2001-02-02 US US09/776,587 patent/US6402122B2/en not_active Expired - Fee Related
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100102286A1 (en) * | 2008-10-23 | 2010-04-29 | David Jordan | Pulling jacket for use while installing wires in conduit |
US8757594B2 (en) * | 2008-10-23 | 2014-06-24 | Southwire Company, Llc | Pulling jacket for use while installing wires in conduit |
WO2011067425A1 (en) * | 2009-12-03 | 2011-06-09 | Citynet España, S.A. | Method for deploying optical fibre networks in underground piping networks |
ES2394254A1 (en) * | 2009-12-03 | 2013-01-30 | Citynet España, S.A. | Method for deploying optical fibre networks in underground piping networks |
US20140353561A1 (en) * | 2013-05-31 | 2014-12-04 | Verizon Patent And Licensing Inc. | System and method for guiding a cable |
CN107658677A (en) * | 2017-08-30 | 2018-02-02 | 台州浩然机械制造有限公司 | A kind of wire stripper and wire stripping chopping method |
US20210349280A1 (en) * | 2018-10-04 | 2021-11-11 | Fujikura Ltd. | Optical fiber protective unit and method for protecting optical fiber |
US11579396B2 (en) * | 2018-10-04 | 2023-02-14 | Fujikura Ltd. | Optical fiber protective unit and method for protecting optical fiber |
US20210351578A1 (en) * | 2020-05-05 | 2021-11-11 | Christopher Kaleshnik | Apparatus and method for installing wire behind existing walls |
US11557889B2 (en) * | 2020-05-05 | 2023-01-17 | Promethean Innovations, Llc | Apparatus and method for installing wire behind existing walls |
US11967806B2 (en) * | 2020-05-05 | 2024-04-23 | Promethean Innovations, Llc | Apparatus and method for installing wire behind existing walls |
CN113031185A (en) * | 2021-04-06 | 2021-06-25 | 商丘工学院 | End traction device for erecting communication engineering optical cable |
Also Published As
Publication number | Publication date |
---|---|
US6402122B2 (en) | 2002-06-11 |
DE10004992A1 (en) | 2001-08-09 |
EP1122843A1 (en) | 2001-08-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SCC SPECIAL COMMUNICATION CABLES GMBH & CO., KG, G Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MAYR, ERNST;EINSLE, GUENTER;REEL/FRAME:011710/0737;SIGNING DATES FROM 20010215 TO 20010222 |
|
AS | Assignment |
Owner name: CCS TECHNOLOGY, INC., DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCC SPECIAL COMMUNICATION CABLE;REEL/FRAME:013231/0237 Effective date: 20020812 |
|
AS | Assignment |
Owner name: CCS TECHNOLOGY, INC., DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCC SPECIAL COMMUNICATION CABLES GMBH & CO. KG;REEL/FRAME:013589/0545 Effective date: 20020812 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20060611 |