US3819144A - Crust breaking machine - Google Patents

Crust breaking machine Download PDF

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Publication number
US3819144A
US3819144A US00297709A US29770972A US3819144A US 3819144 A US3819144 A US 3819144A US 00297709 A US00297709 A US 00297709A US 29770972 A US29770972 A US 29770972A US 3819144 A US3819144 A US 3819144A
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US
United States
Prior art keywords
cantilever arm
machine
crust
breaking
crust breaking
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
US00297709A
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English (en)
Inventor
J Hatlevoll
P Jordal
G Sivertsen
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.)
Ardal og Sunndal Verk AS
Original Assignee
Ardal og Sunndal Verk AS
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 Ardal og Sunndal Verk AS filed Critical Ardal og Sunndal Verk AS
Application granted granted Critical
Publication of US3819144A publication Critical patent/US3819144A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/28—Supports; Devices for holding power-driven percussive tools in working position
    • B25D17/32—Trolleys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/28—Supports; Devices for holding power-driven percussive tools in working position

Definitions

  • Such a crust breaking machine usually consists of a truck or carriage which can be moved along the electrolytic cell or furnace, or possibly a row of such cells or furnaces, on which carriage there is mounted a movable cantilever carrying at its free end a pneumatic tap bar or a hammer which is the crust breaking tool proper.
  • a movable cantilever carrying at its free end a pneumatic tap bar or a hammer which is the crust breaking tool proper.
  • a specific difficulty in breaking the crust at the cell ends consists therein that the passage or opening available for introducing a crust breaking tool, is smaller than the area or more specifically the width of the crust to be broken.
  • this invention relates to a crust breaking machine for breaking the crust on the electrolytic bath in electrolytic cells, in particular enclosed cells, for producing metal such as aluminum, the machine comprising a selfpropelled carriage provided with a cantilever arm which can be elevated and lowered and carries a hammer tool at its free end.
  • the hammer tool is adapted to be swung about an axis which is substantially parallel to or coincident with the axis of the cantilever arm.
  • the cantilever arm is telescopic.
  • FIG. 1 shows an embodiment of the crust breaking machine according to the invention in elevation
  • FIG. 2 shows the machine of FIG. 1 in two different positions seen from above during work at an electrolytic cell.
  • the crust breaking machine shown in the drawing is built up on an ordinary fork truck 1 comprising a conventional lifting mast 4 at its front end.
  • a telescopic cantilever arm 2 is mounted on the lifting mast of the fork truck.
  • This cantilever arm 2 can consist of two parts 2a and 2b so as to make possible the extension of the end of the cantilever arm to a sufficient length for use with the types of electrolytic cells of interest.
  • a hammer tool 3 which is preferably pneumatically driven, but which can also be based on other forms of power.
  • the cantilever arm 2 can be arranged for elevation or lowering by translative displacement in a vertical or substantially vertical plane.
  • the hammer tool 3 with. its impact member 5, for example a tap bar or the like can be brought down into engagement with the crust surface to be broken.
  • Another way of effecting this movement can be to mount the cantilever arm pivotally about a horizontal axis nonnal to the axis of the cantilever arm.
  • the cantilever can also be mounted at other angles, including one generally corresponding to the driving or longitudinal direction of the carriage.
  • FIG. 2 it is shown how the crust breaking machine according to the invention can operate in the very narrow end portion of an electro lytic cell 0 the end or short side of which is designated K and the long side of which is designated L.
  • the anodes are indicated with reference letter A, and S designates the area of the electrolytic bath on which the crust is formed, and which the tool of the crust breaking machine must be able to work.
  • a hydraulic cylinder 8 is adapted to extend or retract the telescopic unit 2a/2b.
  • This movement mechanism results in a machine requiring less space and which is easier to drive in narrow locations, as the telescopic unit with the hammer tool in the inoperative position is substantially centered in front of the fork truck so that the unit only projects slightly to each side of the fork truck.
  • the telescopic unit 2a/2b contains a hydraulic cylinder for extending the cantilever arm 2b, which represents the main movement of the hammer tool in the horizontal plane.
  • the cylinder 8 is rotated together with the remaining cantilever structure in the bracket 6 when during operation swinging movements of the hammer tool 3 with the impact member 5 shall be effected.
  • the free end of the cantilever arm and/or the hammer tool proper can be constructed with a comparatively heavy weight, whereby the loads on the cantilever arm 2 itself and the hydraulic components included therein, as well as the bracket 6 and parts of the fork truck 1, are reduced to a large extent.
  • the machine can also serve other functions than crust breaking operations as such, for instance in connection with the exchange of anode blocks, such as cleaning along anode blocks and cleaning of openings for clumps in the bath and anode butts.
  • This application of the machine is illustrated in the upper portion of FIG. 2.
  • the tool 3 has been inserted into the comparatively narrow space between two anode blocks during replacement of an anode block, and as a consequence of the reduced space requirement of the machine during operation, cleaning can be effected before a new anode block is inserted in the interspace.
  • the crust breaking assembly proper can possibly be designed for easy mounting and dismounting on a common fork truck, whereby the same can also be used for operations conventional for such fork trucks.
  • Crust breaking machine for breaking the crust on the electrolytic bath in electrolytic cells, in particular in enclosed cells, for producing metal such as aluminum, said machine comprising:
  • an extendable cantilever arm mounted on said carriage to extend laterally thereof;
  • a hammer tool mounted in a substantially fixed position at the free end of said cantilever arm and substantially normally thereto;
  • said cantilever arm being mounted for limited rotation about its own longitudinal axis;
  • a machine as claimed in claim 1, wherein said means for rotating said cantilever arm comprises a fluid operated mechanism.
  • a machine as claimed in claim 1, wherein said means for elevating and lowering said cantilever arm includes means for maintaining the lateral orientation of said cantilever arm.
  • Page 1 in the address of the Assignee, chan e "Oslo, Sweden” to Oslo, Norway Page 1, insert the following Foreign Application Priority Data:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Crushing And Grinding (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Catching Or Destruction (AREA)
US00297709A 1971-10-14 1972-10-16 Crust breaking machine Expired - Lifetime US3819144A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO3792/71A NO131036C (xx) 1971-10-14 1971-10-14

Publications (1)

Publication Number Publication Date
US3819144A true US3819144A (en) 1974-06-25

Family

ID=19879850

Family Applications (1)

Application Number Title Priority Date Filing Date
US00297709A Expired - Lifetime US3819144A (en) 1971-10-14 1972-10-16 Crust breaking machine

Country Status (10)

Country Link
US (1) US3819144A (xx)
JP (1) JPS4847651A (xx)
CA (1) CA993833A (xx)
CH (1) CH569798A5 (xx)
DE (1) DE2250367A1 (xx)
FR (1) FR2158887A5 (xx)
GB (1) GB1379427A (xx)
IT (1) IT966310B (xx)
NO (1) NO131036C (xx)
SU (1) SU639460A3 (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4702324A (en) * 1984-05-14 1987-10-27 Aluminum Company Of America Control system for positioning and operating a pneumatic percussion tool
US4852661A (en) * 1987-05-26 1989-08-01 Ellington David A Portable concrete hammer
US5490740A (en) * 1994-09-22 1996-02-13 Johnson; Robert J. Ground stabilized transportable drop hammer
US20050189128A1 (en) * 2004-01-29 2005-09-01 Clark Equipment Company Drop hammer
CN103046079A (zh) * 2012-12-27 2013-04-17 东北大学 一种用于铝电解槽的打壳控制方法及装置
CN104630830A (zh) * 2015-03-13 2015-05-20 王冲 无包打壳器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423787A (en) * 1944-11-01 1947-07-08 Aluminum Co Of America Crust breaking apparatus
US2903949A (en) * 1956-05-14 1959-09-15 John H Lucas Helve action telescoping boom compactor
US3216918A (en) * 1959-09-03 1965-11-09 Pechiney Prod Chimiques Sa Machine for picking and distributing aluminum oxide into electrolytic cells
US3306668A (en) * 1962-09-14 1967-02-28 Ardal Og Sunndal Verk Apparatus for crust breaking
US3702162A (en) * 1970-10-19 1972-11-07 Tampella Oy Ab Adjustable support for ring drilling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423787A (en) * 1944-11-01 1947-07-08 Aluminum Co Of America Crust breaking apparatus
US2903949A (en) * 1956-05-14 1959-09-15 John H Lucas Helve action telescoping boom compactor
US3216918A (en) * 1959-09-03 1965-11-09 Pechiney Prod Chimiques Sa Machine for picking and distributing aluminum oxide into electrolytic cells
US3306668A (en) * 1962-09-14 1967-02-28 Ardal Og Sunndal Verk Apparatus for crust breaking
US3702162A (en) * 1970-10-19 1972-11-07 Tampella Oy Ab Adjustable support for ring drilling

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4702324A (en) * 1984-05-14 1987-10-27 Aluminum Company Of America Control system for positioning and operating a pneumatic percussion tool
US4852661A (en) * 1987-05-26 1989-08-01 Ellington David A Portable concrete hammer
US5490740A (en) * 1994-09-22 1996-02-13 Johnson; Robert J. Ground stabilized transportable drop hammer
US20050189128A1 (en) * 2004-01-29 2005-09-01 Clark Equipment Company Drop hammer
US7237706B2 (en) 2004-01-29 2007-07-03 Clark Equipment Company Drop hammer
CN103046079A (zh) * 2012-12-27 2013-04-17 东北大学 一种用于铝电解槽的打壳控制方法及装置
CN103046079B (zh) * 2012-12-27 2015-11-18 东北大学 一种用于铝电解槽的打壳控制方法及装置
CN104630830A (zh) * 2015-03-13 2015-05-20 王冲 无包打壳器

Also Published As

Publication number Publication date
DE2250367A1 (de) 1973-04-19
FR2158887A5 (xx) 1973-06-15
GB1379427A (en) 1975-01-02
CH569798A5 (xx) 1975-11-28
NO131036B (xx) 1974-12-16
SU639460A3 (ru) 1978-12-25
IT966310B (it) 1974-02-11
CA993833A (en) 1976-07-27
JPS4847651A (xx) 1973-07-06
NO131036C (xx) 1975-07-29

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