Classifications

• • 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
  • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
  • B07B1/48—Stretching devices for screens
  • B07B1/485—Devices for alternately stretching and sagging screening surfaces
• • 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
  • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens

Definitions

• the invention relates to a side seal for sieve devices with a grate which has a plurality of grate bars which are movable and immovable with respect to the side walls and which are connected by flexible sieve elements attached to them and bridging the gaps between the grate bars which are moved or relaxed and relaxed by means of the movable grate bars, the side seal consisting of flexible material being firmly connected on the one hand to the sieve elements and on the other hand to frame side parts.
• Such a side seal is known for example from the applicant's AT-B-386 969.
• the side seal consist of a series of sealing sheets overlapping one another in a scale-like manner, the undesired passage of screenings being avoided by the overlap.
• sieve seal for such sieve devices, which are described, for example, in DE-Al-28 13 630.
• an elastic sealing body is used which bridges the gap between the side wall and screen covering and consists of an elastic foam plastic.
• the invention relates to side seals of the type mentioned at the outset, which consists of sealing sheets which overlap one another in the manner of scales, wherein, in order to improve the sealing properties, the invention provides that each sealing sheet, viewed in the direction of the screen, extends between two grate bars fixed relative to the side wall. These are preferably adjacent fixed grate bars between which there is thus only one movable grate bar.
• the measure according to the invention ensures that the end of the sealing sheet on the inlet and outlet sides is stationary with respect to the side wall. As a result, both adjacent sealing sheets can be joined by simple scale-like superimposition, on the other hand, the tightness is improved.
• FIG. 1 shows a side view of a sieve provided with a side seal according to the invention, partly in section
• FIG. 2 shows the fastening of the sealing sheet end in a view similar to that in FIG Fig. 1 on a larger scale
• Fig. 3 is a plan view according to arrow III in Fig. 2 with the sealing blades opened.
• a screening machine 1 is shown with a side wall 2, on which grate bars 3 are immovably attached.
• a movable grate bar 4 is provided in each case between two grate bars 3 which are adjacent to one another.
• the grate bars 4 protrude through openings 5 in the side wall 2 and are set in a circular, elliptical or rectilinear motion by a movement mechanism outside the side wall 2. This movement can also be oriented up-down or correspond to a tilt-and-turn movement about an axis that runs parallel to the rod axis.
• This side sealing takes place by means of sealing sheets 8, which are connected, preferably glued, along their lower edge region 9 to the lateral edge region of the screen covering 6.
• the parallel upper edge regions 10 of the sealing sheets 8 are fastened to the side wall 2 of the screening device, for example by clamping strips or also by gluing.
• Fig. 3 the situation is shown for the sake of better understanding with folded sealing sheets 8, thus removed side wall 2.
• the arrow F in FIGS. 2 and 3 indicates the conveying direction by which the type of scale-like overlap of the sealing sheets 8 is determined. It is important to note that the overlap area 11 of the two sealing sheets 8 is not glued between the two edge areas 9, 10, so that the two sealing sheets can make a relative movement in this area.
• Fig. 2 shows the attachment of the sealing sheets 8 to the respective screen elements 6 in more detail.
• the sieve element 6 located upstream of the stationary grate bar 3 still ends in the area of this grate bar, directly below its fastening element on the grate bar, in the example shown a cap nut 12 which is placed or screwed onto a threaded bolt of the grate bar 3, whereby a Fastening strip 13 presses the individual sieve elements 6 against the grate bar 3.
• downstream sieve element 6 Since the downstream sieve element 6 is arranged below the upstream sieve element to prevent material penetration, a gap is created downstream of the upper sieve element 6 between the sealing sheet 8 glued to this sieve element and the downstream sieve element 6. The downstream is in this gap sealing sheet 8 pushed in and glued to the downstream sieve element 6. It is not necessary to glue the two sealing sheets 8 together in this area, but it can be provided.
• the sieve elements 6 and the sealing sheets 8 can bridge any multiple of the distance between two adjacent immovable grate bars, but it is preferred that they only extend from one immobile grate bar to the next immovable grate bar, as shown in FIG. 1. Any material previously used in sheet-like sealing elements can be used as the material. In some circumstances, it is possible to switch to lower qualities if a longer service life, for example due to the wear of the screen covering, cannot be achieved, which results in a cost reduction. On the other hand, if the service life is the determining factor, a substantial extension of the service life can be achieved without increasing the costs while maintaining the material of the sealing sheet.
• the attachment between the screen element 6 and the sealing sheet 8 does not have to be done by gluing, but can also be done by riveting, screwing or the like. happen, but sticking is preferred.
• the sealing sheets 8 are connected to the screen elements 6 lying outwards, so that when the sealing sheets are erected, a trough shape with smooth, rounded corners is produced in cross section. It is of course possible, as shown in the AT-B mentioned at the outset, to connect the sealing sheets lying on the inside on the sieve coverings 6, so that an upward-pointing tip is formed during the erection. With this type of curvature of the sealing sheets 8, they are able to withstand larger deformations better than in the variant shown.

Landscapes

• Combined Means For Separation Of Solids (AREA)
• Investigating Or Analysing Biological Materials (AREA)
• Glass Compositions (AREA)
• Crushing And Grinding (AREA)
• Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=6899080

Family Applications (1)

Country Status (11)

Families Citing this family (7)

Family Cites Families (9)

• 1993
  • 1993-10-08 DE DE9315227U patent/DE9315227U1/de not_active Expired - Lifetime
• 1994
  • 1994-10-07 SK SK756-95A patent/SK75695A3/sk unknown
  • 1994-10-07 HU HU9501618A patent/HUT72525A/hu unknown
  • 1994-10-07 CA CA002151247A patent/CA2151247A1/en not_active Abandoned
  • 1994-10-07 US US08/448,609 patent/US5613613A/en not_active Expired - Fee Related
  • 1994-10-07 WO PCT/AT1994/000147 patent/WO1995010367A1/de not_active Application Discontinuation
  • 1994-10-07 CZ CZ951622A patent/CZ162295A3/cs unknown
  • 1994-10-07 EP EP94928196A patent/EP0673286A1/de not_active Withdrawn
  • 1994-10-07 AU AU77334/94A patent/AU7733494A/en not_active Abandoned
  • 1994-10-07 DE DE4497600T patent/DE4497600D2/de not_active Expired - Fee Related
• 1995
  • 1995-06-01 NO NO952174A patent/NO952174D0/no unknown
  • 1995-06-06 FI FI952766A patent/FI952766A0/sv not_active Application Discontinuation

Non-Patent Citations (1)

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