US3727095A - Screw nipple connection for carbon and graphite electrodes - Google Patents

Screw nipple connection for carbon and graphite electrodes Download PDF

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Publication number
US3727095A
US3727095A US00104907A US3727095DA US3727095A US 3727095 A US3727095 A US 3727095A US 00104907 A US00104907 A US 00104907A US 3727095D A US3727095D A US 3727095DA US 3727095 A US3727095 A US 3727095A
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US
United States
Prior art keywords
locking means
nipple
recess
electrode
locking
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
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US00104907A
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English (en)
Inventor
H Hesselmann
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CONRADTY C DT
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Individual
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Filing date
Publication date
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Publication of US3727095A publication Critical patent/US3727095A/en
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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
    • H05B7/14—Arrangements or methods for connecting successive electrode sections
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S403/00—Joints and connections
    • Y10S403/05—Carbon electrode

Definitions

  • the present invention relates to a screw nipple connection for carbon and graphite electrodes especially in electric furnaces and, more specifically, is directed to means for securing such screw nipple connection.
  • Carbon and graphite electrodes are screwed onto each other by cylindrical or double cone threaded nipples of carbon or graphite, in order to make the electrode material follow up in a continuous manner,
  • a loosening of the threaded connection may occur which in its turn may cause considerable disorders in operation.
  • no satisfactory solution has been found heretofore.
  • the hardening and coking process brings'about a reducweight of the electrode strand, bepulled downwardly while the end faces of the electrode move away from each other so that the total current passes through the nipple.
  • a strong overheating of the nipple occurs which may cause breakage.
  • FIG. 1 is a longitudinal section through an embodiment of the threaded nipple according to the invention.
  • FIG. 2 shows a nipple end face with inserted fitting member.
  • FIG. 3 is a view similar to that of FIG. 1 and showing modification according to the invention.
  • the nipple-electrode connection according to the present invention is characterized primarily in that each of the end faces of the threaded nipple has an axial recess into which above the inserted cement layer there is provided a fitting member of carbon or another suitable material, and is furthermore characterized in that said fitting member on that side thereof which faces the electrode is provided with teeth having a radial component.
  • This component depending on the axial displacement of the fitting member by the driving force of the heated-up cement, engages corresponding teeth in the bottom of the electrode box.
  • the recess means in the end faces of the nipple and the fitting members to be inserted therein advantageously have a polygonal contour. Itis, of course, also possible to make the fitting member and the recess means cylindrical. In this instance, however, it is necessary to connect the fitting members by means of graphite pins or similar pins at the bottom of the recess means with the nipples. The turning of the nipples and of the fitting member relative to the electrode is prevented by the teeth which are provided on that side of the fitting member which faces the electrode and by teeth in the bottom of the electrode box. The teeth will in this instance have a radial component.
  • the tooth flanks extend in a radial direction.
  • the nipple and the electrode box may each be provided with a marking the location of which will depend on the pitch of the nipple thread and the pitch of the teeth.
  • FIG. 1 shows an electrode section 1 with a double cone threaded nipple 2.
  • Recess means 3 are provided in the end faces of the nipple, and first a certain predetermined quantity of cement 4 is worked into the recess means 3 whereupon fitting members 5 are inserted in conformity with the recess means.
  • the fitting members 5 have that side thereof which faces the electrode provided with teeth 6.
  • Similar teeth 7 are provided in the bottom 1a of the electrode box-lb.
  • the nipple may by means of screw-in markings be screwed'into the electrode box so that one tooth each of the fitting member teeth is located opposite a tooth space in thebox bottom.
  • Whatlclairriisz, 1 1.
  • an electrode of carbon material having anend face provided with an axial bore, said bore being provided with a thread and having a bottom with first locking means, a threaded nipple threaded into said threaded bore and having that end face thereof which faces said bottom provided with a recess having a bottom, second locking means arranged-in said recess and in locking engagement with said first locking means, and leavening swelled cement arranged in said" recess means and interposed directly between saidsecond locking means and said recess bottom of said nipple while holding said second locking means in firm engagement with said first locking means.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Discharge Heating (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Coke Industry (AREA)
US00104907A 1970-01-13 1971-01-08 Screw nipple connection for carbon and graphite electrodes Expired - Lifetime US3727095A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702001212 DE2001212B2 (de) 1970-01-13 1970-01-13 Schraubnippelverbindung von kohle oder graphitelektroden in elektrischen oefen

Publications (1)

Publication Number Publication Date
US3727095A true US3727095A (en) 1973-04-10

Family

ID=5759481

Family Applications (1)

Application Number Title Priority Date Filing Date
US00104907A Expired - Lifetime US3727095A (en) 1970-01-13 1971-01-08 Screw nipple connection for carbon and graphite electrodes

Country Status (15)

Country Link
US (1) US3727095A (no)
JP (1) JPS4811542B1 (no)
AT (1) AT298088B (no)
BE (1) BE760964A (no)
CA (1) CA935853A (no)
CH (1) CH543214A (no)
DE (1) DE2001212B2 (no)
ES (1) ES194627Y (no)
FR (1) FR2074536A1 (no)
GB (1) GB1275894A (no)
LU (1) LU62394A1 (no)
NO (1) NO127646B (no)
SE (1) SE357870B (no)
YU (1) YU34168B (no)
ZA (1) ZA71210B (no)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005326A (en) * 1975-10-31 1977-01-25 Shigeru Suga Electrode mounting in an arc lamp for use in light fastness testers
US4006380A (en) * 1975-10-31 1977-02-01 Shigeru Suga Mounting of carbon electrodes on a holder of an arc lamp
US5575582A (en) * 1995-01-18 1996-11-19 Ucar Carbon Technology Corporation Fastening device for securing electrode joints

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2226230C3 (de) * 1972-05-30 1984-07-12 Sigri Elektrographit Gmbh, 8901 Meitingen Vorgefertigter Bestandteil einer Graphitelektrode
JPS5260937U (no) * 1975-10-30 1977-05-04

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1572534A (en) * 1923-10-27 1926-02-09 Nat Carbon Co Inc Sectional electrode with locked screw-thread joint
US2969251A (en) * 1960-02-15 1961-01-24 Great Lakes Carbon Corp Carbon electrode joint
US3048433A (en) * 1958-07-25 1962-08-07 Doetsch Ernst Screw nipple connection for electrodes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1572534A (en) * 1923-10-27 1926-02-09 Nat Carbon Co Inc Sectional electrode with locked screw-thread joint
US3048433A (en) * 1958-07-25 1962-08-07 Doetsch Ernst Screw nipple connection for electrodes
US2969251A (en) * 1960-02-15 1961-01-24 Great Lakes Carbon Corp Carbon electrode joint

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005326A (en) * 1975-10-31 1977-01-25 Shigeru Suga Electrode mounting in an arc lamp for use in light fastness testers
US4006380A (en) * 1975-10-31 1977-02-01 Shigeru Suga Mounting of carbon electrodes on a holder of an arc lamp
US5575582A (en) * 1995-01-18 1996-11-19 Ucar Carbon Technology Corporation Fastening device for securing electrode joints

Also Published As

Publication number Publication date
CA935853A (en) 1973-10-23
DE2001212B2 (de) 1972-01-20
ES194627U (es) 1975-01-01
CH543214A (de) 1973-10-15
YU34168B (en) 1978-12-31
FR2074536A1 (no) 1971-10-01
ZA71210B (en) 1971-10-27
YU292970A (en) 1978-05-15
BE760964A (fr) 1971-05-27
SE357870B (no) 1973-07-09
GB1275894A (en) 1972-05-24
NO127647B (no) 1973-07-23
JPS4811542B1 (no) 1973-04-13
NO127646B (no) 1973-07-23
AT298088B (de) 1972-04-25
ES194627Y (es) 1975-05-01
LU62394A1 (no) 1971-08-02
DE2001212A1 (de) 1971-07-29

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