EP3339515A1 - Schaufel und verfahren zum sieben von inertmaterial - Google Patents

Schaufel und verfahren zum sieben von inertmaterial Download PDF

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Publication number
EP3339515A1
EP3339515A1 EP16382646.4A EP16382646A EP3339515A1 EP 3339515 A1 EP3339515 A1 EP 3339515A1 EP 16382646 A EP16382646 A EP 16382646A EP 3339515 A1 EP3339515 A1 EP 3339515A1
Authority
EP
European Patent Office
Prior art keywords
screening
bucket
drum
screening drum
rotation
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.)
Withdrawn
Application number
EP16382646.4A
Other languages
English (en)
French (fr)
Inventor
Javier Aracama Martinez De Lahidalga
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP16382646.4A priority Critical patent/EP3339515A1/de
Publication of EP3339515A1 publication Critical patent/EP3339515A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/407—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with ejecting or other unloading device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/005—Transportable screening plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F7/00—Equipment for conveying or separating excavated material
    • E02F7/06—Delivery chutes or screening plants or mixing plants mounted on dredgers or excavators

Definitions

  • the object of the present invention relates to a bucket of the type used by public work machinery for screening inert material (stones and rubble left from excavation or demolition work) at the actual site location, and to the screening method, as described in the preamble of the independent claims.
  • Buckets that can be can be applied to the end of the arm of an excavating machine and comprise an outer shell are known in the technical field of reference, said machine being configured to select and check the inert material (basically stone, earth and gravel) resulting from excavation and/or demolition operations in civil works.
  • inert material basic stone, earth and gravel
  • a screening bucket conventionally consists of an outer structure that can be connected to the end of an arm of the operating machine and comprises a drum turning inside a fixed structure by means of an assembly consisting of a hydraulically-operated motor and a gear reducer.
  • the outer part of the drum comprises a mesh with holes having dimensions suitably selected to only allow the passage of material with dimensions below a predetermined size.
  • the material inside said drum naturally rotate as well, such that the inert material comes into contact with the mesh and is separated or screened with the dimensions of the material itself: the material having a size smaller than the holes of the mesh of the drum will fall due to gravity, while the material having a larger size will remain in the drum and be discharged once the work cycle ends, the operation being repeated as many times needed.
  • An example of this type of bucket is described in EP 0 284 643 or in EP 1 577 023 .
  • One of the problems associated with these devices relates to the build up of material on the inner side walls of the drum, taking place as a result of the rotation of said drum. It is obvious for the person skilled in the art that as a result of the increase in rotational speed of the drum, on one hand greater productivity is obtained, productivity being understood as an amount of material screened per unit of time, and on the other hand, there will be greater build up of material having a larger size on the side walls.
  • Patent document WO 20122007921 describes a screening bucket that tries to solve this problem by changing the rotational speeds of the drum between two speeds depending on the angular position thereof. Nevertheless, this solution is complex because it requires detection means and switching means to switch between operating modes which: (a) make the bucket manufacturing process, and therefore the end product, more expensive; and (b) simplicity and robustness are fundamental in the design of public work machines because said machines are subjected to constant mechanical stresses in an aggressive environment, because due to a greater technical complexity, more inspections, greater specialization of the staff responsible for operating the machines and more frequent and more expensive maintenance are all required.
  • the present invention describes a screening bucket for screening inert material comprising a support structure and being attached to an end of an articulated arm of a machine for civil engineering use; said bucket comprises a screening drum attached to the support structure such that said screening drum can turn about an axis of rotation; and wherein said screening drum comprises a side wall provided with through holes dimensionally suitable for allowing the passage of inert material of a predetermined size.
  • the screening drum is connected with means to impart to said screening drum a rotational movement about said axis of rotation.
  • the invention comprises means configured for vibrating said screening drum as it turns, which prevents the material from building up on the side walls of the drum.
  • a second aspect of the invention relates to a screening method for screening inert material resulting from a civil engineering operation by means of a screening bucket comprising a support structure which is attached in an articulated manner to an end of an arm of a machine for civil engineering use and a screening drum rotationally connected to the structure such that said screening drum turns about an axis of rotation comprising a step of vibrating the screening drum at the same time as it turns during the rotational movement about the axis.
  • the screening bucket 1 object of the present invention comprises a support structure 2 which is attached in an articulated manner to an end of an articulated arm of a machine of the type commonly used in civil works, which is not shown the attached drawings.
  • Said support structure 2 houses a frustoconical-shaped screening drum 3 with an opening that is broader than the rear part thereof, the side walls of which are provided around the perimeter with a plurality of through holes dimensionally suitable for allowing the passage of the inert material of a predetermined size.
  • the screening drum 3 is connected with means to impart a rotational movement about an axis of rotation (x) which is the axis of revolution of the solid defined by the screening drum 3 itself, i.e., the axis of revolution of the solid of revolution, which is the drum itself.
  • the rotation means comprise a ring 4 arranged around the perimeter of the rear cover 3a of the screening drum 3 and integrally attached to said rear cover 3a.
  • the ring 4 turns as a result of a bearing 5 and as a result of the movement exerted by a first motor 6, which is preferably hydraulic, which movement is transmitted to the ring assembly 4 by means of a belt or pulley 7.
  • the screening bucket 1 object of the present invention has the particularity of having means configured for vibrating the screening drum 3.
  • These means comprise an eccentric weight 8 integrally attached to the shaft of a second hydraulic motor 9 through an elastic coupling 10.
  • the rotation means (4, 5, 6, 7) will activate the drum 3 in a rotational manner with respect to the axis of rotation (x) in a conventional manner, while at the same time, the vibration means (8, 9, 10) exert a vibrational movement on the screening drum 3, rotating at its normal work speed.
  • This vibrational movement has the particularly of preventing the inert material from building up on the side walls due to the centrifugal force of the rotational movement, and therefore improving productivity, which is understood as the amount of material screened per unit of time, in a robust and simple manner.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Shovels (AREA)
EP16382646.4A 2016-12-23 2016-12-23 Schaufel und verfahren zum sieben von inertmaterial Withdrawn EP3339515A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16382646.4A EP3339515A1 (de) 2016-12-23 2016-12-23 Schaufel und verfahren zum sieben von inertmaterial

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16382646.4A EP3339515A1 (de) 2016-12-23 2016-12-23 Schaufel und verfahren zum sieben von inertmaterial

Publications (1)

Publication Number Publication Date
EP3339515A1 true EP3339515A1 (de) 2018-06-27

Family

ID=57909429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16382646.4A Withdrawn EP3339515A1 (de) 2016-12-23 2016-12-23 Schaufel und verfahren zum sieben von inertmaterial

Country Status (1)

Country Link
EP (1) EP3339515A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284643A1 (de) 1987-03-30 1988-10-05 Prodec Inter Ab Gitterförmige Drehschaufel zum Trennen von Teilchen verschiedener Grösse
EP0747136A1 (de) * 1995-06-07 1996-12-11 Technisches Büro für Maschinenbau Ing. Herbert Hausmann Trommelsiebmaschine
EP1577023A1 (de) 2004-03-15 2005-09-21 Andreas Farwick Siebmaschine für unterschiedliche Trommeldurchmesser
JP2009262039A (ja) * 2008-04-24 2009-11-12 Hiroshi Onodera 濾し装置付きトロンメル
WO2012007921A1 (en) 2010-07-15 2012-01-19 Meccanica Breganzese S.P.A. In Breve Mb S.P.A. Screening bucket for a work machine
WO2013046164A1 (en) * 2011-09-30 2013-04-04 Meccanica Breganzese S.P.A. In Breve Mb S.P.A. Bucket for crushing inert material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284643A1 (de) 1987-03-30 1988-10-05 Prodec Inter Ab Gitterförmige Drehschaufel zum Trennen von Teilchen verschiedener Grösse
EP0747136A1 (de) * 1995-06-07 1996-12-11 Technisches Büro für Maschinenbau Ing. Herbert Hausmann Trommelsiebmaschine
EP1577023A1 (de) 2004-03-15 2005-09-21 Andreas Farwick Siebmaschine für unterschiedliche Trommeldurchmesser
JP2009262039A (ja) * 2008-04-24 2009-11-12 Hiroshi Onodera 濾し装置付きトロンメル
WO2012007921A1 (en) 2010-07-15 2012-01-19 Meccanica Breganzese S.P.A. In Breve Mb S.P.A. Screening bucket for a work machine
WO2013046164A1 (en) * 2011-09-30 2013-04-04 Meccanica Breganzese S.P.A. In Breve Mb S.P.A. Bucket for crushing inert material

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