EP0702111A2 - Racleur radial - Google Patents

Racleur radial Download PDF

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Publication number
EP0702111A2
EP0702111A2 EP95114193A EP95114193A EP0702111A2 EP 0702111 A2 EP0702111 A2 EP 0702111A2 EP 95114193 A EP95114193 A EP 95114193A EP 95114193 A EP95114193 A EP 95114193A EP 0702111 A2 EP0702111 A2 EP 0702111A2
Authority
EP
European Patent Office
Prior art keywords
rope
boom
winding drum
roller
bucket
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.)
Ceased
Application number
EP95114193A
Other languages
German (de)
English (en)
Other versions
EP0702111A3 (fr
Inventor
Friedrich Schwing
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.)
Stetter GmbH
Original Assignee
Stetter GmbH
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 Stetter GmbH filed Critical Stetter GmbH
Publication of EP0702111A2 publication Critical patent/EP0702111A2/fr
Publication of EP0702111A3 publication Critical patent/EP0702111A3/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
    • B28C7/08—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of scrapers or skips
    • B28C7/0823—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of scrapers or skips using manually-operated cable-pulled drag shovels
    • B28C7/0829—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of scrapers or skips using manually-operated cable-pulled drag shovels using reciprocating cable-suspended drag shovels
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/48—Drag-lines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/58—Component parts

Definitions

  • the invention relates to a radial scraping mechanism for mineral bearings in a star or linear arrangement in concrete preparation according to the preamble of claim 1.
  • a radial scraper of this type is known from DE-A-1288983.
  • the guide for the tensioning roller consists of a rod of a linear cylinder attached to the boom, which, however, must have a considerable length and is arranged unprotected on the underside of the boom.
  • the rod should hold the axis of the tension pulley.
  • This guide of the tension pulley is not suitable for larger tension pulley strokes.
  • the linear cylinder would have to support the rod and the tension pulley in the slack rope of the hoisting rope on a given path, which appears problematic because of the high forces.
  • the object of the invention is to provide a guide for the tensioning roller, which is suitable for a large movement distance of the tensioning roller and protects it against the mineral bearing.
  • the rope tension of the boom thus has an additional function and there is no need for its own linear guide means on the boom.
  • the guide is located above the boom, which means that it is protected during scraper operation.
  • the rope strands are held taut by the weight of the boom.
  • the adjusting device can have a traction rope running towards the end of the boom, the end of which is attached to a motor-driven winding drum.
  • a two-rope drive with cat return through a second pull rope in reversing mode is also possible, as is adjustment of the trolley by means of a pressure medium cylinder.
  • the two winding drums for the digging rope and the lifting rope have different drum diameters.
  • the hoist rope drum is smaller in diameter than the digging rope drum.
  • cylinder drums are used for both winding drums.
  • the hoist rope winding drum is omitted and its function is taken over by the adjusting device of the tensioning roller.
  • the drum diameter ratio of the two drums is selected so that in a scraping area of the bucket that at least approximates an excavation position of the scraper bucket, the shortening digging rope length is at least approximately equal to the hoisting rope length consumed. If, according to a further embodiment, this diameter ratio of the hoist rope winding drum to the digging rope winding drum is in the range from 0.5 to 0.6, it can be achieved that the adjusting device with its tensioning roller requires no actuation over a large part of the distance.
  • the head roller is mounted on a rocker, which in turn is pivotally mounted on the boom and is preloaded by means of a pretensioning device with an adjustable pretensioning force, that the rocker is assigned a position switching device which the drive device in Depends on the pulling force exerted by the hoist rope on the top roller on and off.
  • the rocker With the rope hanging vertically downward in a straight line and a scraping bucket standing on the floor, the rocker is in a starting position with the pretensioning device set accordingly, in which the position switching device of the drive device for the tensioning roller adjustment is not activated.
  • the position switching device of the drive device for the tensioning roller adjustment is not activated.
  • the rocker When the scraper bucket goes up, slack rope forms under the top roller. Due to the greater rope weight, the rocker swivels and the position switch device switches the adjustment drive on and off again after the slack rope has been removed. If the train becomes larger, the adjustment device is switched on via the position switching device. If a certain tractive force is exceeded, the rocker swivels into a position in which the drive of the adjusting device is also switched off. The scraper bucket cannot dig in too deeply.
  • the winding drum drive stops and the adjustment drive for the tensioning roller executes a predetermined stroke which is sufficient to lift the bucket.
  • the backward movement of the bucket takes place under program control by unwinding the digging rope and returning the tensioning roller.
  • a radial scraper 10 has a bearing for a boom 12 in the center of the star, which is supported on a guying 14.
  • the boom 12 with guying 14 is pivotable about a vertical axis over boxes of a star bearing 16.
  • a digging rope 20 and a lifting rope 22 are attached to a scraper bucket 18.
  • the digging rope 20 leads directly to a winding drum 24 behind the boom bearing and the hoisting rope 22 runs over a head roller 28 at the boom tip to a winding drum 26.
  • Both winding drums 24, 26 are fastened relatively non-rotatably on a drive shaft of a winch motor 30 (FIG. 4). Apart from the two relatively non-rotatable winding drums 24, 26, the arrangement is so far conventional.
  • the bracing 14 of the boom 12, which usually consists of wire ropes, is inventively defined by two twist-free, e.g. Straps consisting of straps 36, 38, which are connected on the one hand to the cantilever head piece and on the other hand to a block and tackle 40, are replaced on each end by hangers 42, 44 to compensate for ropes 46, 48 for a cat 34.
  • the weight of the boom ensures the rope tension of a guide 32 formed in this way for the trolley 34 equipped with rollers, which supports a tension roller 50, around which the hoisting rope 22 running backwards from the top roller 28 - and with the pulling strand to a deflection roller 52 is guided, which is mounted on the boom behind the head roller 28 and runs from there via support rollers under the boom to the hoist rope winding drum 26.
  • An adjustment cable 54 is attached to the trolley 34, which leads to a drive device 56 in the form of a cable winch, which is shown outside the machine housing 58 for reasons of drawing.
  • the hoist cable winch 26 has a smaller diameter than the digging cable winch 24.
  • the diameter of the hoisting cable winch has a value in the range from 50% to 60% of the diameter of the digging cable winch 24.
  • the top roller 28 is mounted on a rocker 60 which can be pivoted about a pivot axis 62 on the boom.
  • a pre-tensioning device 64 which is manually adjustable, presses this rocker arm downward and keeps it in balance with the weight of the rope length of the hoist rope 22 which leads vertically downward from the top roller 28 when the scraper bucket 18 stands on the floor.
  • the rocker 60 has a switching bracket 66 for the optional actuation of two position switching elements 68, 70 which switch the drive motor of the cable winch 56 on or off. With 72 a shock absorber is designated, which dampens vibrations of the rocker 60 with respect to the boom 12 and the position switching elements 68, 70.
  • a third switching element 74 comes into operation when this is on the rocker 60 effective weight of the lifting cable 22 running from the head roller 28 to the scraper bucket falls below a minimum weight set by the pretensioning device 64, which only occurs in the event of a cable break in order to bring the entire machine to a standstill.
  • the function of the new scraper is as follows: The scraper bucket 18 is in the starting position under the jib tip on the ground.
  • the limit switch 68 is closed.
  • the switch 70 is open.
  • the motor 30 is switched on, the digging rope 20 is wound up and the hoisting rope 22 is unwound.
  • the scraper bucket 18 moves in the direction of the arrow 76.
  • the lifting rope length extending from it up to the top roller 28 makes an adjustment angle of approximately 40 °, no lifting rope is consumed, but the lifting rope is still unwound, however, due to the transmission ratio of the two rope drums, only half as much as the digging rope 20 is wound up.
  • the switch 70 puts the adjustment cable winch 56 into operation, so that the trolley 34 with the tensioning roller 50 is moved towards the machine-side end of the guying 14. Due to the pulley effect, the hoist rope correction is twice as large as the movement distance of the cat 34. If too much hoist rope 22 is pulled in, the tension of the hoist rope length running to the bucket increases, so that the switch 68 opens and the adjusting drive 56 switches off. This game repeats itself until the scraper bucket 18 has reached the upper position 18 'above the material crater.
  • the adjusting drum 56 is started, which pulls the trolley 34 towards the rear in the direction of the machine housing 58, as a result of which the scraper bucket 18 is lifted out of the material store and emptied on the tensioned hoisting rope 22.
  • the adjustment drive 56 is stopped by means of a limit switch 80, which is actuated by the digging rope 20.
  • the motor 30 of the two winding drums 24, 26 is then reversed with a time delay and the scraper bucket on the tensioned rope under the jib is retracted to approximately the middle thereof.
  • the tensioning roller 50 remains in its end position in the area of the rear boom part.
  • the scraper bucket weight and the translation of the winding drums relative to one another mean that they set in motion independently without a motor drive.
  • the drum ratio causes the scraper bucket 18 to swivel rapidly with the radius around the head roller 28 downwards towards the ground under the jib tip.
  • the trolley 34 is relaxed, a so-called ejection effect is achieved, which brings the scraper further in the extension of the boom axis to the outside, thus increasing the working area.
  • the position switching element 74 serves as a rope break safety device and in this case automatically switches off the automatic mode.
  • FIGS. 6 and 7 schematically illustrate a modified guying 14 of the boom 12.
  • four rear deflection rollers 81 are rotatably mounted on a common axis.
  • two front deflection rollers 82 are rotatably mounted, with a distance that is equal to the distance between the two outer rear rollers 81 of the four-roller arrangement.
  • a wire rope 84 is attached to boom 12 at about 1/3 of the boom length at 86, then runs to an inner rear roller 81, from there to front roller 82, from there to form a first guide strand 46 back to outer rear roller 81, then via a deflection roller 88 arranged approximately 2/3 of the length of the boom and back to the second inner rear roller 81 and forward to the second front roller 82 and from there - forming a second guide strand 48 - via the second outer rear roller 81 to a winch 90.
  • the two guide strands 46, 48 are parallel and serve as a linear guide for the trolley 34 which supports the tensioning roller 50.
  • rollers 82 are shown at a higher level for better understanding. In fact, they are on the boom level.
  • the fastening 86, the deflection roller 88 and the tensioning roller 50 also lie in the practical embodiment in the cantilever axis.
  • the two parallel rope strands 46, 48 of the guying 14 according to FIGS. 6 and 7 belong to a one-piece wire rope.
  • the lifting cable winding drum 26 and the deflection roller 52 are omitted.
  • the lifting cable 22 which is guided around the tensioning roller 50 runs approximately in the direction of the boom tip and is fastened at its end to the boom 12.
  • the lifting cable function is performed by the adjusting element of the tensioning roller 50, which can consist of a linear pressure medium cylinder or a cable winding drum similar to the winding drum 56.
  • the tensioning roller hardly moves or does not move at all in the first quarter of the upward travel of the bucket and then runs in a program-controlled manner with a progressive tendency towards the boom tip.
  • the tensioning roller stroke is somewhat larger than in the system shown in Fig.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Earth Drilling (AREA)
  • Jib Cranes (AREA)
EP95114193A 1994-09-14 1995-09-09 Racleur radial Ceased EP0702111A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4432641 1994-09-14
DE4432641A DE4432641A1 (de) 1994-09-14 1994-09-14 Radial-Schrappwerk

Publications (2)

Publication Number Publication Date
EP0702111A2 true EP0702111A2 (fr) 1996-03-20
EP0702111A3 EP0702111A3 (fr) 1996-05-29

Family

ID=6528137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95114193A Ceased EP0702111A3 (fr) 1994-09-14 1995-09-09 Racleur radial

Country Status (3)

Country Link
EP (1) EP0702111A3 (fr)
CZ (1) CZ236395A3 (fr)
DE (1) DE4432641A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103266640A (zh) * 2013-05-13 2013-08-28 江西稀有金属钨业控股集团有限公司 一种带滚筒的电耙耙斗
CN106144667A (zh) * 2016-08-16 2016-11-23 江苏嘉德重工有限公司 一种悬臂堆料机用对中装置
CN107651366A (zh) * 2017-09-30 2018-02-02 李星辰 生物发电厂秸秆输送节能装置
CN114014039A (zh) * 2021-12-07 2022-02-08 安徽荣国环保智能科技有限公司 智能平仓机器人

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29703257U1 (de) * 1997-02-24 1997-04-17 Liebherr-Mischtechnik Gmbh, 88427 Bad Schussenried Schrappkübel

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1288983B (de) 1965-04-28 1969-02-06 Betonma Internat Schrappwerk

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE537954C (de) * 1930-05-24 1931-11-09 Demag Akt Ges Umsteuerungsvorrichtung fuer Schrapperhaspel
ES367362A1 (es) * 1968-05-22 1971-04-01 Vidal Lucien Instalacion para la manipulacion de materiales a granel.
US3605987A (en) * 1968-09-23 1971-09-20 Franco Sigismondo Automatic apparatus for conveying loose materials to a utilization station
CH594557A5 (en) * 1975-10-21 1978-01-13 Hans Fickler Linear motion drive from rotary motor
DE2939710A1 (de) * 1979-09-29 1981-04-16 Kabag Karlsruher Baumaschinen Gmbh, 7500 Karlsruhe Schrappgeraet fuer betonbereitungsanlagen
DE7928115U1 (de) * 1979-10-03 1980-01-03 Kabag Karlsruher Baumaschinen Gmbh, 7500 Karlsruhe Schrappgeraet fuer eine betonbereitungsanlage
DE2942915C2 (de) * 1979-10-24 1982-02-04 Elba-Werk Maschinen-Gesellschaft Mbh & Co, 7505 Ettlingen Manuell oder automatisch arbeitende Seilschrappervorrichtung
DE3336935C2 (de) * 1983-10-11 1986-01-02 Elba-Werk Maschinen-Gesellschaft Mbh & Co, 7505 Ettlingen Seilschrappervorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1288983B (de) 1965-04-28 1969-02-06 Betonma Internat Schrappwerk

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103266640A (zh) * 2013-05-13 2013-08-28 江西稀有金属钨业控股集团有限公司 一种带滚筒的电耙耙斗
CN103266640B (zh) * 2013-05-13 2015-09-30 江西稀有金属钨业控股集团有限公司 一种带滚筒的电耙耙斗
CN106144667A (zh) * 2016-08-16 2016-11-23 江苏嘉德重工有限公司 一种悬臂堆料机用对中装置
CN106144667B (zh) * 2016-08-16 2019-03-26 江苏嘉德重工有限公司 一种悬臂堆料机用对中装置
CN107651366A (zh) * 2017-09-30 2018-02-02 李星辰 生物发电厂秸秆输送节能装置
CN114014039A (zh) * 2021-12-07 2022-02-08 安徽荣国环保智能科技有限公司 智能平仓机器人

Also Published As

Publication number Publication date
CZ236395A3 (en) 1996-07-17
DE4432641A1 (de) 1996-03-21
EP0702111A3 (fr) 1996-05-29

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