• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Strainer comprising a conical or cup-shaped upwardly open receiving space, where the receiving space is formed by a bottom surface (14) and to this towards the free upper edge (12) of the strainer upwardly widening cradle surface (13), where the cradle surface (13) comprises a number of slots (15) distributed over the periphery of the cradle surface (13) and widening in the direction of and extending up to the upper edge (12) of the screen with the slot (15) also open upwards. The invention also relates to a dewaterer for organic waste comprising a screen as above. H: DOCWORK Ansökstext.doc, 2009-09- 15 090148EN
    公开号:SE0950672A1
    申请号:SE0950672
    申请日:2009-09-15
    公开日:2011-03-16
    发明作者:Lennart Johansson
    申请人:Disperator Ab；
    IPC主号:
    专利说明:

    Describes a separating device comprising a cylindrical perforated drum in which the crushed and water-mixed food residues are fed into one end of the cylindrical perforated drum, and. with. Using a feed screw inside the drum, the crushed and water-mixed food residues are fed to the other end of the drum while the water can flow away through the perforation of the cylinder wall. Possibly a loaded abutment is arranged at. the end of the drum from which the waste is to be discharged, in order to increase the pressure force against the waste so that more water is forced out. A similar device is also described in EP 0 961 649 B1.
    However, these known devices have not been as effective as desired and. not considered working. so good, and are also complicated to maintain and clean.
    JP-A-05208146 previously discloses a dewaterer of the above-mentioned type, which comprises a rotating cone-shaped basket or screen, to which the material to be dewatered is supplied from above. The rotating screen is provided with perforations, so that the liquid contained in the material can pass through the wall of the screen to be led away. The strainer rotates with. such. high 'speed that the fixed. the material of the rotation is caused to move up the sloping wall surface of the screen and is then led away when the material has passed over the upper edge of the screen. This dewaterer also has shortcomings in that the perforations are easily clogged by the solid content of the material to be dewatered, and thus the dewatering is not effective and the residual material that passes up over the upper edge of the screen will have an excessively high water content.
    It is therefore an object of the present invention to provide a new strainer for a dewaterer of the above kind, and also to provide a new and better functioning H: DOCWORK Application Application.doc, 2009-09-15 090148EN 10 15 20 25 30 dewaterers for use in connection with waste mills of the kind mentioned above.
    The above-mentioned object of the invention is achieved with a strainer with a conical or bowl-shaped upwardly open receiving space, where the receiving space is formed by a bottom surface and to it against the free upper edge of the strainer upwardly widening wall surface conical or cup-shaped upwardly open strainer, where the wall surface is provided with a number upwardly widening slots distributed over the wall surface and. extending the upper edge of the strainer. with periphery itself 'up to the slit also open upwards. the strainer is the slits According to a preferred embodiment. of extending all the way along the wall surface of the screen, from its bottom to the upper edge of the screen.
    According to yet another embodiment of the screen, slots extending all the way along the wall surface of the screen are arranged alternately with shorter slots which only extend along a part of the wall surface up to the upper edge of the screen.
    According to yet another embodiment of the screen, reinforcing ribs are arranged on the outside of the wall surface of the screen extending from the bottom of the screen. up along a part of the wall surface, mainly arranged midway between the slots.
    According to yet another preferred embodiment, the wall surface of the screen is formed by a number of wall elements fixed in a bottom part of the screen, and the slots forming between them.
    The invention will now be described in more detail in the form of a non-limiting exemplary embodiment, illustrated by means of the accompanying drawing figures, in which Fig. 1 shows a schematic vertical section through a dewaterer with. a strainer according to the invention, Fig. 2 shows a plan view from above of the strainer according to the invention, Fig. 3 shows a perspective view of the strainer according to the invention, seen obliquely from above, Fig. 4 shows a side view of the sieve according to the invention, Fig. 5 shows a plan view of a conical cover of the dewaterer according to the invention, and Fig. 6 shows a perspective view of the conical cover in Fig. 5.
    Fig. 1 shows a vertical section through a dewaterer 1 according to the invention. The dewaterer comprises a housing 2, which encloses an electric motor 3 arranged in the housing, with a motor shaft 4 projecting vertically upwards. A motor 5 is connected to the motor shaft 4 which is attached to the motor shaft so that the screen 5 rotates when the motor shaft 4 rotates . The screen 5 is open upwards, and the walls of the screen are provided with slots so that water supplied in the screen can pass out through the walls of the screen to a collecting space 6, from which the water can then be led away through an outlet nozzle (not shown). The collecting space 6 is delimited downwards by a tight partition wall 7, under which the motor 3 is located, so that water cannot penetrate down and into the tower.
    The dewaterer further comprises a detachable lid 21 on top of a detachable screen housing 8, which covers the upwardly open end of the screen 5, and is provided with an outlet 9, through which solid, dewatered, material can be led away. In the center of the lid 21, opposite the center 1 of the screen 5, there is an inlet hole through which a supply pipe 10 can be connected to the dewaterer for supplying the material to be dewatered.
    The motor 3 in the dewaterer is arranged to be able to rotate its output motor shaft 4 at high speed, so that the screen 5 can thereby be caused to rotate at the same high speed. When the crushed and water-mixed food residues are fed into the dewaterer 1 via the supply pipe 10 from above, this waste flows towards the bottom of the screen 5. Due to its rapid rotation it acts as a centrifuge which slung- H: DOCWORK Application text.doc, 2009-09-15 090148EN 10 15 20 25 30 out the water through the slots in the wall 5 of the screen 5 and out into the collection space 6, while the solid material as. can not pass through the slits by the centrifugal force pressed against the wall of the screen and thereby caused to travel up the wall of the screen 5 towards its upper edge and further upwards over it, and further out through the outlet 9 of the screen housing 8, through which the separated solid material can be carried out from the dewaterer 1, for example to a collecting man (not shown) arranged next to the dewaterer.
    For a simple cleaning of the dewaterer, the lid 21 is suitably attached to the screen housing 8 so that it can be easily detached for cleaning both the inside of the screen housing 8 and also of the screen 5 after the supply pipe 10 and the lid 21 have first been loosened.
    As mentioned above, the strainer 5 is attached to the output shaft 4 of the motor 3, and suitably this attachment 11 is designed so as to extend through the bottom of the strainer 5 and provided with a body projecting over the bottom, for example a conical cover 19, by hand. the attachment 11 can be easily handled so that the strainer 5 can also be easily detached for cleaning.
    Fig. 2 shows a plan view, seen from above, of the screen 5 according to the invention. As can be seen from the figure, the screen has a substantially round circumference, which also constitutes the upper edge 12 of the screen 5. The wall surface 13 of the screen tapers towards the bottom surface 14 of the screen, so that the wall surface in connection with the bottom surface has a substantially smaller diameter than at the upper edge 12 of the screen, as is clear from Fig. 3 and Fig. 4. The screen 5 can thus be said to have a funnel shape, with the larger diameter at the upper edge 12 of the screen, as the screen 5 is used in a drain in Fig. 1. In the embodiment shown, the wall surface is flat from the bottom up to the upper edge, but it can also be designed in other ways, such as e.g. that the strainer has a bowl shape, with a curved wall surface between the bottom and the upper edge.
    H: DOCWORK Application text.doc, 2009-09-15 090148EN 10 15 20 25 30 As can be seen from Figs. 2-4, the wall surface 13 of the screen 5 is not completely covering, but has slots 15 at even distances from each other, which slits extend all the way from the bottom surface 14 up to the upper edge 12 of the screen, thereby dividing the wall surface into a number of wall segments 16. The side edges of the wall elements 16 are directed radially towards the center 1 of the bottom surface 14, so that both the wall elements and the slots 15 will have an upwardly widening shape towards the upper edge 12.
    This is of essential importance for the function of the slots 15 that it as. water conductor, when the widening shape makes the solid material does not get stuck in the slot but as initiated by the centrifugal force tends to move outwards and then at the same time upwards towards the upper edge 12 to be led away there as mentioned earlier.
    As a further complement to the slots 15, shorter slots 17 can be arranged in the wall elements 16, which extend only a short distance downwards from the upper edge 12, in order thereby thereby further increasing the drainage surface which can lead the water away from the screen, and thereby make residual waste as dry as possible. These shorter slits 17 also have a shape widening upwards towards the upper edge 12 for the same reasons as for the slits 15 extending over the entire height of the wall surface.
    In order to increase the stability of the screen 5, it is suitable as shown in Fig. 3 and Fig. 4 that the bottom surface of the screen is extended so that it also extends radially outside the lower edge of the wall surface 13 to form a bracket for reinforcing elements 18, which are inserted. between the wall elements 16 and the extended part 14a of the bottom surface. The reinforcing elements 18 can be designed so that they are substantially perpendicular to the wall elements as formed by the elements 16, but can also have another shape, elongated tongues which are formed by the elements 16, 2009-09-15 090148EN 10 15 20 25 30 from the bottom part are folded up and attached to the wall elements 16.
    The screen 5 is suitably made of stainless steel, and may be formed by a flat circular bottom part forming the bottom surface 14, and the wall surface 13 may be formed by separate wall elements 16 fixed in the bottom part 14, for example by welding. The reinforcing ribs 18 are then also suitably welded to. both the bottom part 14 and the wall elements 16.
    Preferably, however, the screen 5 is formed of a sheet material, in which the slots are punched out and the wall elements. 16 unfolded from the bottom part 14 then formed in one piece with them.
    The screen 5 can of course be made of other materials, but these should of course be non-corrosive materials, as the screen is exposed to both water and. also for mechanical wear.
    Composite material or plastic material is an example of a material that could be used instead of stainless steel. At least inside the wall surface of the screen. 13, but preferably the entire screen 5 can then suitably be coated with a slip-facilitating material, i.e. a material with a low coefficient of friction, e.g. Teflon® or similar materials, which prevent the waste material from sticking to the surface of the screen, and. also 'facilitates * the fast. the sliding of the material 'up the inside of the wall surface 13 due to the centrifugal force, and thus the removal of the solid material over the upper edge 12 of the screen 5. The material also facilitates the cleaning of the screen.
    The above-mentioned attachment 11 for the screen 5 in the dewaterer 1 may according to a special embodiment of the invention comprise a conical cover 19, which is arranged to be connected to the motor shaft 4 to hold the screen to the motor shaft so that the screen rotates with the motor shaft. The conical cover 19 may, for example, comprise a thread which is connected to a complementary thread on / in the motor shaft 4, and is then arranged to - pulling the thread, press the strainer 5 against the upper end of the motor shaft 4. Other fastening methods for the conical cover 19 at the motor shaft 4 are also conceivable.
    The conical cover 19 is thus a dome-shaped body, with a substantially smooth lower part for abutment against the inner bottom of the screen, and comprises internal connecting means, for example threading, for the attachment to the motor shaft 4.
    On the outside, the conical cover 19 is provided with a pair of grip notches 20, so that the conical cover 19 can be gripped and rotated relative to the motor shaft 4 for fastening or possibly be designed with loosening. the grip incisions undercut surfaces that make it easier to grip the conical cover. 19. Suitably the surface of the conical cover 19 is like the sieve. coated. with. a slip-facilitating material, i.e. a material with a low coefficient of friction, e.g. Teflon® or similar material, which prevents the waste material from sticking to the surface of the conical cover. Because the inlet 10 of the dewaterer is located directly above the conical cover, the incoming waste will fall down towards the conical cover and then be thrown out against the wall surface 13 of the screen. The conical shape of the cover prevents material to be dewatered from sticking to the cover.
    The design of the screen in accordance with the invention has provided a screen which is not clogged by the material to be dewatered when the screen is used in a dewaterer. The design of the screen in accordance with the invention provides a self-cleaning screen in that the openings, the slots, widen in the upward direction, ie. in the same direction as. the material should move upwards along the inner wall surface of the screen.
    H: DOCWORK Ansökstext.doc, 2009-09-15 090148EN A dewaterer in accordance with the invention thereby becomes very efficient, and does not normally need to be stopped during operation for cleaning, but can function for an entire working day without cleaning.
    H: DOCWORK Ansökstext.doc, 2009-09-15 090148EN
    权利要求:
    Claims (15)
    [1]
    A screen comprising a conical or cup-shaped upwardly open opening where the receiving space is formed by a (12) receiving space, (14) and to it against the free upper edge (13) of the screen, bottom surface characterized by (15) distributed upwardly widening wall surface ( 13) (13) that the wall surface comprises a number of slots peripherally and widening in the direction of (12) over the wall surface and extending up to the upper edge of the screen with the slot (15) also open upwards.
    [2]
    A screen according to claim 1, characterized in that wear (15) is arranged extending all the way along the screen (13), (14) of the wall surface of the screen from its bottom to the upper edge (12) of the screen.
    [3]
    Screen according to claim 1, characterized in that slots (15) are arranged extending all the way along the wall surface (13) of the screen arranged alternately with shorter slots (17) extending only along a part of the wall surface (13) up to the upper edge of the strainer (12).
    [4]
    4. A screen according to claim 3, characterized in that also (17) are designed widening in the direction (12). the shorter slits towards the upper edge of the strainer
    [5]
    Screen according to claim 1, characterized in that pre- (18) are (13) arranged on the outside of the screen (14) reinforcing elements extending from the bottom (13) of the screen up to (14), wall surface spaced from the bottom surface (15). to support against the wall surface mainly arranged midway between the slots
    [6]
    Screen according to one of the preceding claims, characterized in that the wall surface (13) of the screen is formed by a number of cradle elements (2009-09-15 090148EN 10 15 20 25 30 11 16) fixed. in a bottom part (14) of the strainer, and between them forming the slots (15).
    [7]
    Strainer according to one of the preceding claims, characterized in that the wall surface (13) of the screen is formed in one (14), the wear (16) being a piece with the bottom part of a sheet material, the seams being formed by punching and the wall elements unfolded from the bottom part (14).
    [8]
    Strainer according to one of the preceding claims - (13), the claims, t e c k n a d in that the wall surface, at least on its inside, is coated with a non-slip material.
    [9]
    A dewaterer for organic waste, in particular a dewaterer arranged to remove water from the crushed food residues from a waste grinder for food waste, which dewaterer comprises a high-speed rotatable screen (5) with a conical or bowl-shaped upwardly open receiving space for take crushed and with. water mixed with waste centrally over the screen (5) from above, where the receiving space is formed by a bottom surface (14) and to this rocking surface (13) extending upwards towards the free upper edge (12) of the screen, the characteristic - (13) comprises a number slits (13) provided by (15) that the cradle surface distributed over the periphery of the cradle surface and widening towards and extending up to the upper edge (12) of the screen with the slot (15) also open upwards to allow water from the ground waste to pass out through the cradle surface of the screen (5) (13) while causing the solid content of the rotation of the screen to be displaced upwards along the cradle surface of the screen and up over its upper edge (12). of that (16)
    [10]
    Drainage according to claim 9, characterized by the wall surface (13) of the screen (s) formed by a number of cradle elements H: DOCWORK Application text.doc, 2009-09-15 090148EN 10 15 20 25 12 fixed in a bottom part (15). (14) at the strainer, and between them forming the slits
    [11]
    Drainer according to claim 9 or * 10, characterized in that the cradle surface (13) of the screen is formed in one piece with (14), the slots being (16) the bottom part of a sheet material, formed by punching and the cradle elements being folded up from the bottom part ( 14).
    [12]
    Drainage according to one of Claims 9 to 11, characterized in that the cradle surface (13), at least on its inside, is coated with a material with a low coefficient of friction.
    [13]
    Drainage according to one of Claims 9 to 12, c a n n e - t e o k n a d of the strainer. (5) is attached to the. Dewaterer (1) by means of a conical cover (19).
    [14]
    Drainage according to Claim 13, characterized in that the conical cover (19) is coated on its outside with a material with a low coefficient of friction.
    [15]
    Drainage according to Claim 13 or 14, characterized in that the conical cover (19) is provided on the outside (20). n a d off with grip incisions H: DOCWORK Applicationtext.doc, 2009-09-15 090148EN
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    同族专利:
    公开号 | 公开日
    SE534117C2|2011-05-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2014-04-29| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE0950672A|SE534117C2|2009-09-15|2009-09-15|Strainer for dewaterers and dewaterers|SE0950672A| SE534117C2|2009-09-15|2009-09-15|Strainer for dewaterers and dewaterers|
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