US3908073A - Feeding of liquid into a liquid cooled, heavy current cable - Google Patents

Feeding of liquid into a liquid cooled, heavy current cable Download PDF

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Publication number
US3908073A
US3908073A US515517A US51551774A US3908073A US 3908073 A US3908073 A US 3908073A US 515517 A US515517 A US 515517A US 51551774 A US51551774 A US 51551774A US 3908073 A US3908073 A US 3908073A
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US
United States
Prior art keywords
tube
conductors
cable
socket
tubes
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Expired - Lifetime
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US515517A
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English (en)
Inventor
Ernst Hubner
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KM Kabelmetal AG
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KM Kabelmetal AG
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Publication date
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/11—Arrangements for conducting current to the electrode terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/001—Power supply cables for the electrodes of electric-welding apparatus or electric-arc furnaces
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
    • H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
    • H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid

Definitions

  • A' socket connected to the cable end has a Oct. 20, 1973 Germany............................ 2352808 body, a sleeve for insertion of the conductor ends, and
  • the present invention relates to liquid cooled high power cable, particularly of the heavy current type. used to apply power to electrical arc melting furnaces.
  • Heavy current cable with liquid cooling are comprised for example, of an inner tube through which passes the coolant, and conductors, possibly of the stranded variety, are disposed on that tube.
  • This partic ular assembly is jacketed in a tubular envelope or hose. The ends of such a cable are connected to a socket which serves also as connector for the liquid coolant.
  • the US. Pat. No. 3,551,581 discloses a flexible cable for heavy current having an inner tube for passing cooling water and an outer envelope as mechanical protection; the conducts are disposed between tube and envelope.
  • the inner tube is perforated over its entire length to permit water to flow also around the conductors on the outside of the tube (but, of course, inside of the envelope). Additionally, the tube has axial ribs separating and insulating the individual conductors from each other.
  • cooling of the conductors is not well defined with such an arrangement. Rather, cooling depends on a more or less random flow pattern as between the interior of the tube and the axially partitioned space on the outside holding the conductors. Additionally, the inner tube is made from sections with throttles interposed at the section joints to impede the flow of coolant and force it through the perforations.
  • a particular tube is threaded into the socket and communicates directly with a duct therein. That tube has bores and the aboveconductors, the coolant will flow directly from the discharge openings along the conductors for cooling them.
  • the conductors are strapped to the tube of the socket which extends from the socket duct, and as disclosed and claimed in my copending application (D- 5599), the straps must not squeeze the feeder tubes and loop around them so that the feeder tubes extend outside of the strapped conductor assembly.
  • FIG. 1 illustrates a longitudinal section through a socket and end of a liquid cooled cable constructed in accordance with the preferred embodiment of the invention
  • FIG. 2 is a section view along line 2-2 in FIG. 1;
  • FIG. 3 is a section view of a sub-assembly of the assembly shown in FIG. 1.
  • the cable illustrated here is comprised of an inner tube 1, for example, a hose made of synthetic rubber, traded under the name Neopren.
  • a plurality of stranded conductors 2 are disposed along and around the periphery of that tube 1.
  • the tube and conductor assembly is enveloped by a rubber hose 3, preferably of the type which is reinforced by plies of fabric.
  • Hose or tube 3 is essentially concentric to tube or hose 1, and the conductors occupy a portion of the ring or annular space between tubes 1 and 3.
  • Reference number 5 refers to a cable socket to which the various parts are connected.
  • the socket has a main body 5a and a sleeve like extension 5b.
  • Rubber hose or envelope 3 is connected to socket extension 5b by means of clamps 4 which are antimagnetic. The conductor ends are inserted into that extension 5b.
  • the hose 1 is held by a flexible sleeve 6 which in turn is held by a threaded connector 8, to which it is soldered.
  • Connector 8 in turn is threaded in a tube 7 which extends from socket 5, in that the tube 7 is threaded into the socket body 5a at 9, well inside of sleeve extension 5b.
  • the socket 5, particularly main body 5a is a solid piece of forged metal with a central bore 10 and lateral ducts for running water to the cable. Bore l0 communicates with tube 7 and the important feature here is that the conductors 2 themselves will be enveloped by flowing water in the following manner.
  • tube 7 has four radial (lateral) openings 16, and bent tubes 11 are soldered to tube 7 to run the water from the conduit path 10-7 so the annular space between tubes 1 and 3 containing the conductors.
  • these feeder tubes 11 extend radially from tube 7 in a star pattern and veer into axial direction along the general extension of the cable to discharge cooling fluid freely into the space between respective two conductors.
  • tubes 11 end inbetween respective two adjacent conductors 2.
  • the Figure shows eight conductors 2 and four such tubes 11. Eight tubes 11 of like or smaller dimensions could be used instead. Size and number of tubes 11 employed depends to a considerable extent on the rate of coolant flow needed for a particular electrical power consumption by the cable.
  • Tubes 11 are made of metal, preferably copper or another heat proof material. The tubes 11 are brazed to tube 7 or otherwise connected thereto at the openings 16.
  • bores 12 are additionally provided in connector 8 for passing, additionally, water into the annular space between the inner and outer tubes 1 and 3 for cooling the conductors 2 by way of direct contact with these conductors.
  • part of the coolant fed to duct 10 in socket 5 passes through these bores 12 and another part of the coolant is fed to the conductors through tubes 11.
  • a cover or stop in tube 6 permits only a small portion of water to pass into tube 1.
  • the cooling effect provided by the water in hose 1 is rather small and the water is used here primarily as stabilizer.
  • tube 7 is more readily derivable from FIG. 3.
  • the tube has a corrugated exterior 13 to increase friction between it and the conductor 2, which are to be secured to that tube 7.
  • the corrugations particularly prevent slippage of the conductors.
  • tube 7 has slightly widened axial ends for reasons which will be shown shortly.
  • tube 7 could be corrugated as a whole.
  • tube 7 it is preferred to use a basically straight wall tube in which corrugations have been machined through turning, milling or the like. This way, no flexibility is imparted upon the tube 7 which remains particularly stiff as against squeezingwhen the conductors are strapped thereto, as will be described shortly.
  • the conductors 2 have a more radial outward disposition adjacent the thicker end portions 7a of tube 7 and they come close to the inner wall of socket sleeve 5b. Accordingly, the conductors are also radially spaced in these regions and here particularly, where the radial portions of feeder tubes 11 pass from tube 7 between respective two conductors, spread radially thereat accordingly.
  • the circles 2a represent this displaced disposition.
  • Clamping straps 14 are particularly provided for fas tening the conductors to tube 7. These straps are preferably antimagnetic, and they clamp the conductors onto and against tube 7, so that they are maintained in position even under high tension. Particularly, these straps urge the conductors 2 into conformity with the outer contour of tube 7 and here particularly, the corrugated and radially recessed portion 13 thereof. The reason for using antimagnetic straps and clamps is to be seen in that interference should be avoided with the clamping action by strong electromagnetic fields emanating from the heavy current through the conductor.
  • soft solder may be used to anchor the conductors 2 to tube 7 inside of socket sleeve and extension Sb.
  • the coolant flow exits from tubes 11 as well as openings 12 are located outside of socket 5, so that solder between parts 2 and 7 will not interfere with the coolant as discharged into the cable conductor space.
  • Such low melting solder provides for additional fastening of the conductors to socket 5 inside of sleeve extension 5b.
  • clamping straps 4 still hold all of the conductors to tube 7 quite firmly, so that they will not be pulled out.
  • the straps 14 meander to some extent in that they loop around tubes 11 on the radial inside as far as the overall axis of the assembly is concerned, so that clamping and fastening action is not exerted upon the rather thin walled tubes 11; they will not be shut by squeezing.
  • the cable is assembled in the following manner.
  • the sub-assembly shown inFIG. 3 is provided first, (except for threaded connector 8).
  • the cable conductors are placed on tube 7 and fastened thereto by means of clamp straps 14.
  • the cable conductor ends are firmly positioned in that manner and it can readily be seen that this tube conductor sub-assembly can be tested as to strength against dislodgement upon pulling on the conductors.
  • tube 7 (9) is threaded into socket body 5a so that the conductor ends will be positioned inside of socket sleeve 5b.
  • the space between tube 7 and socket 5 is then filled with soft solder; usually this type of solder has a high tin content.
  • connector 8 with tube 6 soldered (brazed) thereto is threaded to the outer end of tube 7 and hose 1 is finally slipped onto tube 6.
  • Conceivably clamps may be used here also.
  • the stranded conductors 2 are thereafter stranded as a whole about tube 1, whereupon the second socket is connected to the outer end of the cable.
  • outer tube 3 is provided onto the assembly, including heat protection and wear resistance layers and spacers. That part of the cable assembly is conventional.
  • the outer tube 3 is secured, actually in water proof fashion, tothe outside of socket 5 by means of antimagnetic clamps and/or straps 4.
  • tubes 11 will not only serve for feeding coolant to the cable, but, at the other end and socket, liquid is discharged from the cable in the same fashion.
  • Construction for discharge may not be that critical, but it is clearly economical to use the same kind of socket construction.
  • Liquid cooled, heavy current cable having an inner tube, an outer tube and conductors inbetween the inner and outer tubes, further having a socket with a sleeve portion for receiving the ends of the conductors, the socket further provided with means for receiving cooling fluid and passing it to the interior of the sleeve portion, the improvement comprising a plurality of feeder tubes in the sleeve connected for receiving the said cooling fluid and passing it directly towards the space between the inner and outer tubes of the cable for flowing around the conductors in that space,
  • a particular tube extends in the sleeve of the socket and receives cooling fluid, and wherein the conductors are fastened to the particular tube, the feeder tubes being feeder tubes, the feeder tubes continuing axially for discharging fluid to the space between the conductors.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Insulated Conductors (AREA)
US515517A 1973-10-20 1974-10-17 Feeding of liquid into a liquid cooled, heavy current cable Expired - Lifetime US3908073A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732352808 DE2352808A1 (de) 1973-10-20 1973-10-20 Fluessigkeitsgekuehltes hochstromkabel, insbesondere anschlusskabel fuer elektrische lichtbogen-schmelzoefen

Publications (1)

Publication Number Publication Date
US3908073A true US3908073A (en) 1975-09-23

Family

ID=5896038

Family Applications (1)

Application Number Title Priority Date Filing Date
US515517A Expired - Lifetime US3908073A (en) 1973-10-20 1974-10-17 Feeding of liquid into a liquid cooled, heavy current cable

Country Status (13)

Country Link
US (1) US3908073A (fr)
JP (1) JPS5077886A (fr)
AT (1) AT330273B (fr)
BE (1) BE820552A (fr)
CA (1) CA1015416A (fr)
CH (1) CH568640A5 (fr)
DE (1) DE2352808A1 (fr)
ES (1) ES430853A1 (fr)
FR (1) FR2248589B1 (fr)
GB (1) GB1477904A (fr)
IT (1) IT1021760B (fr)
NL (1) NL7413453A (fr)
SE (1) SE7413163L (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080295998A1 (en) * 2007-05-31 2008-12-04 Siemens Energy & Automation, Inc. Integrated water current connection for motor drive
CN102436867A (zh) * 2010-09-29 2012-05-02 江苏旭日冶金环保设备厂 变角可卸再生式水冷电缆
CN102570076A (zh) * 2012-02-02 2012-07-11 中国科学院电工研究所 大电流高温超导电缆终端哈夫型过渡连接装置
US20190221330A1 (en) * 2016-09-27 2019-07-18 Phoenix Contact E-Mobility Gmbh Electric cable having a coolant line

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490719A (en) * 1981-11-27 1984-12-25 United Technologies Corporation Polarization controlled map matcher missile guidance system
US5125004A (en) * 1991-01-30 1992-06-23 Consarc Composition Vacuum induction melting assembly having simultaneously activated cooling and power connections
DE102015117508A1 (de) * 2015-10-15 2017-04-20 Phoenix Contact E-Mobility Gmbh Elektrisches Kabel mit einer Fluidleitung zum Kühlen
DE102015016088A1 (de) * 2015-12-11 2017-06-14 Schmidt Hochstromtechnik GmbH Hochleistungskoaxialkabel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2835721A (en) * 1954-05-27 1958-05-20 Progressive Welder Sales Co Electrical welding cable
US2969415A (en) * 1957-05-31 1961-01-24 Vickers Electrical Co Ltd Electric cable terminations
US3652797A (en) * 1970-08-13 1972-03-28 Daniel J Goodman Safety anchored multiconductor cable for electric arc furnaces
US3784722A (en) * 1972-07-17 1974-01-08 D Goodman Water-cooled electric furnace cable
US3801724A (en) * 1972-09-15 1974-04-02 D Goodman Safety-anchored multi-conductor water-cooled electric arc furnace cable
US3808350A (en) * 1972-03-14 1974-04-30 Kabel Metallwerke Ghh Liquid cooled heavy current cable

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2835721A (en) * 1954-05-27 1958-05-20 Progressive Welder Sales Co Electrical welding cable
US2969415A (en) * 1957-05-31 1961-01-24 Vickers Electrical Co Ltd Electric cable terminations
US3652797A (en) * 1970-08-13 1972-03-28 Daniel J Goodman Safety anchored multiconductor cable for electric arc furnaces
US3808350A (en) * 1972-03-14 1974-04-30 Kabel Metallwerke Ghh Liquid cooled heavy current cable
US3784722A (en) * 1972-07-17 1974-01-08 D Goodman Water-cooled electric furnace cable
US3801724A (en) * 1972-09-15 1974-04-02 D Goodman Safety-anchored multi-conductor water-cooled electric arc furnace cable

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080295998A1 (en) * 2007-05-31 2008-12-04 Siemens Energy & Automation, Inc. Integrated water current connection for motor drive
US8699210B2 (en) * 2007-05-31 2014-04-15 Siemens Industry, Inc. Integrated water current connection for motor drive
CN102436867A (zh) * 2010-09-29 2012-05-02 江苏旭日冶金环保设备厂 变角可卸再生式水冷电缆
CN102570076A (zh) * 2012-02-02 2012-07-11 中国科学院电工研究所 大电流高温超导电缆终端哈夫型过渡连接装置
US20190221330A1 (en) * 2016-09-27 2019-07-18 Phoenix Contact E-Mobility Gmbh Electric cable having a coolant line

Also Published As

Publication number Publication date
CA1015416A (en) 1977-08-09
BE820552A (fr) 1975-01-16
FR2248589A1 (fr) 1975-05-16
CH568640A5 (fr) 1975-10-31
NL7413453A (nl) 1975-04-22
AT330273B (de) 1976-06-25
GB1477904A (en) 1977-06-29
JPS5077886A (fr) 1975-06-25
ATA809074A (de) 1975-09-15
FR2248589B1 (fr) 1978-09-15
IT1021760B (it) 1978-02-20
DE2352808A1 (de) 1975-04-30
ES430853A1 (es) 1976-10-01
SE7413163L (fr) 1975-04-21

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