US3198567A - Breeze grab - Google Patents

Breeze grab Download PDF

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Publication number
US3198567A
US3198567A US277920A US27792063A US3198567A US 3198567 A US3198567 A US 3198567A US 277920 A US277920 A US 277920A US 27792063 A US27792063 A US 27792063A US 3198567 A US3198567 A US 3198567A
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US
United States
Prior art keywords
grab
cross
crane
tongs
column
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
US277920A
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English (en)
Inventor
Jongejan Gerrit
Plazier Nico
Stokman Bernardus Wilhelmus
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.)
KONINK NL HOOGORENS EN STAALFA
KONINKLIJKE NEDERLANDSCHE HOOGORENS EN STAALFABRIEKEN NV
Original Assignee
KONINK NL HOOGORENS EN STAALFA
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 KONINK NL HOOGORENS EN STAALFA filed Critical KONINK NL HOOGORENS EN STAALFA
Application granted granted Critical
Publication of US3198567A publication Critical patent/US3198567A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/02—Bucket grabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/12—Grabs actuated by two or more ropes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/70—Furnaces for ingots, i.e. soaking pits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/005—Shaft or like vertical or substantially vertical furnaces wherein no smelting of the charge occurs, e.g. calcining or sintering furnaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/01—General aspects of mobile cranes, overhead travelling cranes, gantry cranes, loading bridges, cranes for building ships on slipways, cranes for foundries or cranes for public works
    • B66C2700/012—Trolleys or runways
    • B66C2700/017—Installations characterised by their destination or by the load-engaging element for as far as the trolley is essential

Definitions

  • the invention concerns a grab for breeze (spent coke), hit at least two shells to be opened and closed, for use as an auxiliary tool for a pair of soaking pit charger crane tongs, comprising a column and a pair of tongs movable relative to said column.
  • An auxiliary tool of this kind is generally known and in use.
  • coke breeze, dolomite, or chrome magnesite has to be removed periodi ally. This removal should be effected as quickly as possible in order to prevent production and heat losses between two charges. For the removal of this material it is not possible to use a grab operating with cables, since the cables do not withstand the elevated temperatures in the soaking pit.
  • a known method consists in removing the above-mentioned material, along with the oxide layer that has dropped off the ingots and the slag formed, with the aid of a scraper hung in the soaking pit charger crane, by means of which scraper this material is scraped towards an opening in the centre or to the side of the bottom of the pit hearth. It is a drawback of this method that this opening often tends to be clogged, and also that the scraper may impinge upon unevennesses in the bottom of the pit, in consequence of which very great forces may be exerted on the crane.
  • each of the shells is pivotally attached at one end directly to a first cross-beam, or traverse, and at another point via at least one pivoting connecting rod each to a second cross-beam, or traverse, vertically movable relative to the first cross-beam, and that the grab has a head which can be engaged by the arms of the crane tongs, said head being connected or connectable with one of the cross-beams, while means have been provided for ensuring that by a movement of the tongs in relation to the grab shells resting on the ground the other crossbeam is hung on the column or the tongs respectively.
  • the head may be fixedly connected with a grab column, which near its lower end has a transverse element adapted to engage and thus lift one cross-beam in one angular positionand the other cross-beam in another angular position.
  • the construction may be such that the upper cross-beam has a guiding portion extending centrally downwards through the lower cross-beam, about which the lower cross-beam is permitted to move up and down, and within which the grab column can be moved up and down in a given angular position in relation to the upper cross-beam, the transverse element extending radially beyond the guiding portion so as to engage the lower cross-beam, while the grab.
  • the head so that the transverse element can engage against the underside of the guiding portion.
  • the construction may also be such that the head is connected with one cross-beam, while the other cross-beam has connecting means for lifting and connecting it with the column of the charger crane.
  • one cross-beam is permanently connected with the column of the charger crane, while at will the tongs can engage the head, in which case, when the tongs are lifted, the grab is closed, or the tongs can release the head, in which case, when the tongs are lifted, the grab is opened.
  • the upper cross-beam may be weighted.
  • the breeze grab must be designated to operated at elevated temperatures, preferably without the soaking pit hearth being cooled, the breeze grab must naturally be of heavy construction, so as to prevent its being heated through, since otherwise the deformations of the grab prevent its proper operation.
  • the grabs are large, in general owing to their great Weight the closing force will be sufficient, but when the grabs are smaller, it may be of importance to weight the upper cross-beam.
  • FIGURE 1 shows a front elevation, partly in section, of a breeze grab and a pair of soaking pit charger crane tongs cooperating therewith, showing the grab in open position.
  • FIGURE 2 is a View similar to that of FIGURE 1, the breeze grab being shown in the closed position.
  • FIGURE 3 is a side elevation, partly in section, of the breeze grab shown in FIGURE 1.
  • FIGURE 4 shows a longitudinal section through the mechanism for operating the breeze grab, the breeze grab being closed.
  • FIGURE 5 shows a cross-section similar to that of FIGURE 4, but with the breeze grab being opened.
  • FIGURE 6 shows a top view of the structure shown in FIGURE 4.
  • FIGURE 7 shows an elevation and partial section similar to those of the breeze grab according to FIGURE 1, but refers to a second embodiment.
  • FIGURE 8 is a similar View of the embodiment of FIGURE 7, with the grab shown in closed position.
  • FIGURE 9 shows the embodiment according to FIG- URE 7 in a position turned through the breeze grab being shown in the open position.
  • the soaking pit charger crane tongs to which the breeze grab is auxiliary comprises a column 1, in relation to ca arms 2 are relatively movable while pivoting about a pin 4 and are guided at one end by means of a roller 5 in a slot 6 in the lower end of column 1. A relative vertical movement of the tongs in relation to the column causes the tongs to be opened or closed.
  • the column 1 is further rotatable about its vertical axis.
  • the grab operated with the aid of the above-mentioned tongs consists essentially of two shells '7, each of which is pivotally attached with one point to a traverse, or cross-beam 8 and with another point to a connecting means 19 so as to pivot about a pin 9, said connecting means connecting the shell 7 with a traverse, or crossbeam 11, with which the connecting means It) is connected so as to pivot about a pin 12.
  • a closing or opening movement is imparted to the shells.
  • a grab column 13 with a head 14 has been provided, which head is engaged by the crane tongs.
  • the head 14 and along with it the grab column 13 can be turned, in consequence of which a transverse element 15 attached to the lower end of the column 13 can be made to engage at will either against the underside of the crossbeam 8 or against the underside of the cross-beam 11.
  • the operating mechanism preferably consists of a guiding portion 16 consisting of two strips, which are welded to the upper cross-beam, between which strips the column 13 is longitudinally movable and rotatable.
  • the distance between the strips 16 is such that the transverse element 15 is vertically movable between the strips only in a given angular position. In this latter angular position the transverse element 15 engages against the underside of the lower cross-beam 8 as the tongs are lifted
  • the strips 16 are provided on their underside with recesses 17, into which fits the transverse element 15.
  • the grab column 13 When the tongs are moved downwards with the grab column 13 until the element 15 is beneath the guiding portion 16, with the aid of the tongs the grab column 13 can be turned through 90, in consequence of which the transverse element 15 comes to rest exactly underneath the recesses 17 and engages the recesses 17 when the tongs are lifted. When the tongs are lifted further, the upward force is therefore transferred via the guiding portion 16 to the upper cross-beam 11, which results in the opening of the grab.
  • the upper part of the guiding portion may be furnished with reinforcing plates 18, which are welded to the strips 16ers well as to the upper cross-beam H.
  • FIGURES 7, 8 and 9 is essentially the same grab, but in this case the grab column 13 is fixedly connected with the lower cross-beam' 8.
  • the grab column 13 further passes with some clearance through an opening in the upper cross-beam 11.
  • the upper cross-beam is connected with the column of the charger crane by means or" chains 19, for instance.
  • the closing'and opening movements of the grab are effected by lifting the lower cross-beam 8 via the grab column 13 and the head 14 with the aid of the tongs 2, or lifting the upper cross-beam with the aid of the chains 19 respectively, while the tongs 2 naturally have to be clear of the head 14.
  • the breeze grab having shells, each directly connected to a first cross-beam at one end and connected to a second cross-beam by means of at least one pivotally connected connecting rod at the other end, the cross-beams being relatively movable to and away from each other,
  • the breeze grab having a head adapted to be engaged by crane tongs and said head being connected to a grab column having a transverse element secured thereto near its lower end to liftingly engage said first cross-beam in one relative angular position and to liftingly engage said second cross-beam in another relative angular position, one cross-beam having a vertically extending guide member centrally fixed thereto and passing through a central aperture in the other cross-beam, the grab column being vertically movable within said guide element in one
  • the breeze grab having shells, each directly connected to a first cross-beam at one end and connected to a second cross-beam by means of at least one pivotally connected connecting rod at the other end, one of said first and second cross-beams being an upper crossbeam and the other being a lower one, the cross-beams being relatively movable to and away from each other,
  • the breeze grab having a head adapted to be engaged by crane tongs and said head being connected to a grab column having a transverse element secured thereto near its lower end to liftingly engage said first cross-beam in one relative angular position and toliftirigly engage said second cross-beam in another relative angular position, the upper one of the cross-beams having a vertically extending guide member centrally fixed thereto and
  • a breeze grab, auxiliary tool to be operated by a pair of soaking pit charger crane tongs via a crane column having shells each pivotally connected in different points to two traverses one above the other, one of the pivotal connections also allowing a horizontal displacement of its pivot point with respect to the traverse to which it is pivotally connected, so that by relative vertical movement of said traverses the shells are opened or closed, means forming a head having opposing surfaces spaced sufiiciently apart so that they may be grasped by said crane tongs, a rigid rod extending downwardly from said head means through an opening in the upper one of said traverses to cooperate with the lower one of said traverses for causing relative movement between the two traverses when the head means is lifted by the crane tongs.
  • the grab having a head with means to allow crane tongs to engage and move said head, said head having a downwardly extending rod having at its lower end a protruding part, which in one angular position of head and rod about the vertical axis of the rod is engageable with one of the traverses from below to have it move vertically with the head and which protruding part in another angular position of the head and the rod is engageable with the other traverse from below to have it move vertically with the head, there being a non-circular opening in a part of one of the traverses to allow the protruding part to pass therethrough towards the other traverse in one angular position of the head and the rod and to prevent the protruding part from rnov ing through said opening in another angular position of the head and the rod, the grab and traverses being of such weights and dimensions that when the head engages one traverse the grab tends to be opened or remain open
  • the breeze grab having shells each pivotally connected in different points to two traverses one above the other, one of the pivotal connections also allowing a horizontal displacement of its pivot point with respect to the traverse to which it is pivotally connected, so that by relative vertical movement of said traverses the shells are opened or closed, the grab having a head with means to allow crane tongs to engage and move said head, said head having a downwardly extending rod connected to one of the traverses, the other traverse being provided with means to liftingly connect the other traverse to the crane column.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Load-Engaging Elements For Cranes (AREA)
US277920A 1962-05-03 1963-05-03 Breeze grab Expired - Lifetime US3198567A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL277998 1962-05-03

Publications (1)

Publication Number Publication Date
US3198567A true US3198567A (en) 1965-08-03

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ID=19753799

Family Applications (1)

Application Number Title Priority Date Filing Date
US277920A Expired - Lifetime US3198567A (en) 1962-05-03 1963-05-03 Breeze grab

Country Status (5)

Country Link
US (1) US3198567A (ja)
BE (1) BE631833A (ja)
GB (1) GB1025722A (ja)
LU (1) LU43665A1 (ja)
NL (1) NL120328C (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894728A (en) * 1973-02-21 1975-07-15 Elphiac Sa Slag-removing apparatus
US5193873A (en) * 1989-12-15 1993-03-16 Centro De Investigacion Y. Asistencia Tecnica Del Estado De Queretaro, A.C. Sugar cane grab
US5284375A (en) * 1993-03-12 1994-02-08 Ingersoll-Rand Company Single actuation rod gripping mechanism
CN110484700A (zh) * 2019-09-03 2019-11-22 湖南三特机械制造有限公司 一种用于工程机械引导轮淬火设备的升降转台

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE479269C (de) * 1929-07-16 Heinrich Reichmann Selbstgreifer
US2743954A (en) * 1951-07-16 1956-05-01 Stora Kopparbergs Bergslags Ab Clutching tong
US2820664A (en) * 1952-10-22 1958-01-21 Mende Fritz Multiple shell grab

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE479269C (de) * 1929-07-16 Heinrich Reichmann Selbstgreifer
US2743954A (en) * 1951-07-16 1956-05-01 Stora Kopparbergs Bergslags Ab Clutching tong
US2820664A (en) * 1952-10-22 1958-01-21 Mende Fritz Multiple shell grab

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894728A (en) * 1973-02-21 1975-07-15 Elphiac Sa Slag-removing apparatus
US5193873A (en) * 1989-12-15 1993-03-16 Centro De Investigacion Y. Asistencia Tecnica Del Estado De Queretaro, A.C. Sugar cane grab
US5284375A (en) * 1993-03-12 1994-02-08 Ingersoll-Rand Company Single actuation rod gripping mechanism
CN110484700A (zh) * 2019-09-03 2019-11-22 湖南三特机械制造有限公司 一种用于工程机械引导轮淬火设备的升降转台

Also Published As

Publication number Publication date
NL120328C (ja)
GB1025722A (en) 1966-04-14
BE631833A (ja)
LU43665A1 (ja) 1963-11-02

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