EP0349710A2 - Roue d'égouttage à godets pour installations de traitement du sable - Google Patents

Roue d'égouttage à godets pour installations de traitement du sable Download PDF

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Publication number
EP0349710A2
EP0349710A2 EP89105330A EP89105330A EP0349710A2 EP 0349710 A2 EP0349710 A2 EP 0349710A2 EP 89105330 A EP89105330 A EP 89105330A EP 89105330 A EP89105330 A EP 89105330A EP 0349710 A2 EP0349710 A2 EP 0349710A2
Authority
EP
European Patent Office
Prior art keywords
wheel according
cups
water
chamber
chambers
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.)
Granted
Application number
EP89105330A
Other languages
German (de)
English (en)
Other versions
EP0349710B1 (fr
EP0349710A3 (en
Inventor
Fritz Stichweh
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.)
FRITZ STICHWEH GmbH
Original Assignee
FRITZ STICHWEH 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 FRITZ STICHWEH GmbH filed Critical FRITZ STICHWEH GmbH
Publication of EP0349710A2 publication Critical patent/EP0349710A2/fr
Publication of EP0349710A3 publication Critical patent/EP0349710A3/de
Application granted granted Critical
Publication of EP0349710B1 publication Critical patent/EP0349710B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
    • B03B5/56—Drum classifiers

Definitions

  • the invention relates to a dewatering scoop wheel for systems for sand processing, in which the cups arranged on the circumference of the scoop wheel pass through a tub loaded with the sand-water mixture, and in which the bottoms of the cups are designed as slotted screens for the outflow of the water taken from the tub are.
  • the extracted material is usually first fed to a sieving machine, which sorts the material by size, and then the sieved fine-grained material is fed to a bucket wheel arrangement, in which the material is washed and then separated from the water.
  • the mixture of sand and water is introduced into a trough in which a bucket wheel with cups arranged on its circumference slowly rotates, the cups continuously absorbing the water-sand mixture.
  • the cups which are designed as slotted sieves, the water that is carried along can flow back into the tub when the cups leave the tub. After about half a turn of the bucket wheel after the cups have emerged from the water level in the tub, the cups then release the sand largely freed of water to a conveyor line.
  • the invention is therefore based on the object of providing a dewatering bucket wheel of the type mentioned at the outset, with which disruptive components during the dewatering of the sand can be removed in a simple manner.
  • a chamber adjoins the bottom of each cup, which runs in the direction of the wheel interior and is open at its free end, that several injector devices are arranged in a fixed manner in the tub below the water level in such a way that a medium can be injected with them into the free ends of the chambers running past them in the direction of the bottoms of the cups assigned to the chambers and only those chambers can be acted upon with the medium whose assigned cups are still below the water level or are just emerging from it that the injection is so large that an upflow arises in the affected beakers, and that means are provided for laterally removing the surface water formed by the upflow in the beakers with impurities floating therein before it flows through the bottoms into the chambers can.
  • the chambers can be produced simply by spiral-shaped sheets running perpendicular to the side walls of the scoop wheel and delimited by them, at one end of which the sides of the bottom designed as a slotted screen facing the inside of the scoop wheel are fastened, and the other end of which at a predetermined radius of the bucket wheel ends.
  • the injectors are preferably arranged such that the injection into a chamber is interrupted as soon as the surface of the cup belonging to the chamber reaches a predetermined height above the water level, while at least the subsequent chamber, preferably the three subsequent chambers, remain exposed to the medium . It is expedient to provide means for keeping the water level constant.
  • the means for removing the surface water contain a second plate bridging the fastening point of the plate on the bottom of the cup, which connects with the side walls of the scoop wheel, the end region of the first plate pointing towards its interior, and one at the fastening point of the first
  • the adjacent sieve area forms a second chamber, smaller than the first chamber, which is provided with a lateral drain.
  • the area of the sieve which adjoins the fastening point of the first sheet and which opens into the second chamber is provided with a larger sieve gap width than the area of the sieve which opens into the first chamber. In this way, the surface water with the contaminants can quickly flow into the second chamber.
  • At least one overflow channel in the tub with an outflow leading to the outside, which is arranged to be height-adjustable or pivotable. This makes it possible to influence the amount of fine sand to be separated out.
  • Water is preferably used as the injected medium. However, air can be used instead.
  • FIG. 1 and 3 show a trough 1, into which a scoop wheel 2, which is provided with cups 3 on its outer circumference, is immersed and rotates slowly in the direction of arrow 4.
  • a sieved, water-mixed sand is continuously fed into the tub 1 from a sieving machine (not shown) in the direction of the arrow 5.
  • the cups take the water-sand mixture from the tub 1 with the circulation of the scoop wheel 2, and as soon as the cups 3 leave the water level 7 in the tub 1, the water they carry can pass through their bottoms 6 designed as slotted screens into the tub 1 flow back. After about half a turn following the emergence from the water level 7, the cups 3 throw the largely water-free sand into an outlet 8, from which the sand does not fall on one shown conveyor line arrives.
  • the ends of the outward-facing sides of the bottoms 6 end in a cutting edge 9, by which the absorption of the sand from the tub 1 is facilitated.
  • a solid sheet 17 is fastened, the end of which is connected to the cutting edge 9 of the cup which follows in the circumferential direction.
  • a sheet 10 is attached to the inwardly facing side of the shelves 6.
  • the sheets 10 run spirally towards the inside of the scoop wheel and all end on the same radius 11 of the scoop wheel.
  • the plates 10 form with the lateral boundary walls 12 under each of the floors 6 a chamber 13 which is open at its inner end.
  • the bottoms 6 are designed in a known manner as slotted sieves, the areas of the bottoms which extend from the cutting edge 9 to the fastening point 14 of the sheets 10 have a gap width which allows the water which has been taken along to flow away from the cups 3 without problems, while the gap width of the area 16 of the bottoms from the fastening point 14 to its connection to the sheet 17 is substantially larger than in the area opening into the chambers 13.
  • the area 16 provided with the larger gap width opens into a small chamber 18, which is formed by a sheet 19 bridging the fastening point 14, the boundary walls 12 of the scoop wheel 2, the area 16 of the bottom 6 and the upper end of the sheet 10.
  • the small chambers 18 are each provided with a drain 20 which opens into a channel, not shown, outside the boundary walls 12 of the scoop wheel 2.
  • the supply pipes are connected to a water supply via controllable valves 23.
  • the valves allow the amount and pressure of the water injected from the nozzles 21 into the chambers 13 to be adjusted. In any case, the setting is carried out in such a way that the injected water reaches the cups 3 and thereby an upflow is generated in them, through which contaminants, which are lighter than the sand, float.
  • the nozzle arrangement is carried out in such a way that the upflow is generated in the cups which stand before emerging from the water level 7, the injection into a chamber 13 being interrupted as soon as the surface of the cup belonging to this chamber is a predetermined height above the water level 7 reached.
  • the surface water with the floating undesirable constituents such as wood, coal etc. can, after emerging, flow through the screen area 16 with the large gap width into the associated small chamber 18 and be discharged from there via the side drain 20.
  • a stationary nozzle arrangement 24, which is fed with water or air and is directed laterally onto the surface of the cup that appears in each case, can assist the flow into the chamber 18.
  • a sieve width of approximately 6 mm in the region 16 of the trays 6 has proven to be suitable, while the sieve width in the remaining region of the trays is approximately 1 mm.
  • the number of the chambers 13 acted upon by the nozzles 21 depends on the respective circumstances and can be selected and adapted accordingly by means of the valves 23.
  • the level of the water level can be kept constant by a simple overflow, but control devices can also be provided which control the valves 23 or pumps.
  • an overflow in the form of two overflow channels 25 is provided, which lie opposite each other Ging sides are arranged within the tub 1, and from which a drain port 26 leads to the outside.
  • the troughs 25 are adjustable in height.
  • the overflow channels 25 are each pivotably mounted about a horizontal axis 27 running perpendicular to their longitudinal extent, which is at the same time the axis of the drain connector 26.
  • the pivot axis 27 with the drain port 26 is arranged near one end of the overflow channel. In the normal position, the upper edges of the overflow channels run horizontally. In this position the water level is at its highest, and the water overflows along the entire length of the overflow channels. In this case, little fine sand is excreted.
  • the overflow channels are lowered by swiveling about their axes 27 at the end opposite the discharge nozzle. This lowers the water level.
  • the water overflow no longer occurs along the entire length of the channels, but only on a section. In this area, the flow velocity of the water is correspondingly higher, so that more fine sand is excreted.
  • the pivoting movement should be synchronized.
  • the means for executing the pivoting movement can be of any design.
  • the free end of the overflow channels 25 can be lowered and raised mechanically, hydraulically or pneumatically.
  • a simple solution is indicated in Fig. 1.
  • a spindle 28 is rotatably mounted at the free end of the overflow channel 25, which can be adjusted in its axial direction by means of a handwheel 29, which is supported on a stationary plate 30, preferably connected to the tub 1, and thereby the overflow channel 25 about the axis 27 pivots.
  • the medium supplied to the nozzles 21 is preferably water, but instead it would also be possible to effect the desired upward flow of the undesired constituents of the sand by air.

Landscapes

  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Catching Or Destruction (AREA)
  • Hydroponics (AREA)
  • Fertilizers (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
  • Filtration Of Liquid (AREA)
EP89105330A 1988-07-07 1989-03-25 Roue d'égouttage à godets pour installations de traitement du sable Expired - Lifetime EP0349710B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3823028A DE3823028A1 (de) 1988-07-07 1988-07-07 Entwaesserungs-schoepfrad fuer anlagen zur sandaufbereitung
DE3823028 1988-07-07

Publications (3)

Publication Number Publication Date
EP0349710A2 true EP0349710A2 (fr) 1990-01-10
EP0349710A3 EP0349710A3 (en) 1990-12-19
EP0349710B1 EP0349710B1 (fr) 1994-06-08

Family

ID=6358171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105330A Expired - Lifetime EP0349710B1 (fr) 1988-07-07 1989-03-25 Roue d'égouttage à godets pour installations de traitement du sable

Country Status (4)

Country Link
EP (1) EP0349710B1 (fr)
AT (1) ATE106778T1 (fr)
DE (2) DE3823028A1 (fr)
DK (1) DK231689A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4021318A1 (de) * 1990-07-04 1992-01-09 Michael Brenner Auswaschtrog und verfahren zum betreiben desselben

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214948C2 (de) * 1992-05-06 1994-02-17 Ajo Anlagentechnik Gmbh & Co K Entwässerungsanlage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1812280A (en) * 1928-11-15 1931-06-30 Guy B Bebout Method and apparatus for cleaning gravel or the like
CH298425A (de) * 1951-10-11 1954-05-15 Ratzinger Karl Trogwasch- und -sortiermaschine.
DE1208261B (de) * 1964-06-24 1966-01-05 Stichweh K G Maschinenfabrik Kiesentwaesserungsvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4021318A1 (de) * 1990-07-04 1992-01-09 Michael Brenner Auswaschtrog und verfahren zum betreiben desselben

Also Published As

Publication number Publication date
DE3823028A1 (de) 1990-01-11
DK231689A (da) 1990-01-08
DE58907813D1 (de) 1994-07-14
DK231689D0 (da) 1989-05-12
ATE106778T1 (de) 1994-06-15
EP0349710B1 (fr) 1994-06-08
EP0349710A3 (en) 1990-12-19

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