EP0085458A1 - Siebmaschine - Google Patents
Siebmaschine Download PDFInfo
- Publication number
- EP0085458A1 EP0085458A1 EP83200109A EP83200109A EP0085458A1 EP 0085458 A1 EP0085458 A1 EP 0085458A1 EP 83200109 A EP83200109 A EP 83200109A EP 83200109 A EP83200109 A EP 83200109A EP 0085458 A1 EP0085458 A1 EP 0085458A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sieve surface
- sieving device
- rotary axis
- sieve
- rotate
- 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
Links
Images
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
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- 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
- B07B1/08—Screens rotating within their own plane
-
- 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
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
Definitions
- the invention relates to a sieving device comprising a pervious sieve surface adapted to rotate about an upwardly extending rotary axis.
- Such a sieving device is known from Dutch Patent Application 7605572.
- the sieve surface forms part of the outer surface of a cone, in which the part nearest the rotary axis at the lower level and the part of the sieve surface furthest remote from the rotary axis being at the higher level.
- the material to be sieved has to move outwardly along the sieve surface, the fine particles to be separated have to fall down through the sieve surface and the coarse particles have to be ejected from the outer periphery of the sieve surface.
- the speed of movement of the material to be sieved towards the outer periphery of the sieve is proportionally low near the rotary axis so that comparatively only a small amount of material can be processed per unit time.
- the speed of rotation of the sieve is raised, the product will pass through the major part of the sieve surface at a distance from the rotary axis with such a velocity that an effective sieving is out of the question.
- a further disadvantage of this known sieving device is that particles can easily stick in the perforations of the sieve surface, from which they can no longer part, since on the contrary due to the effect of the centrifugal force or force of gravity they clamp tight in the perforations.
- the invention has for its object to provide a sieving device of the kind set forth by which the disadvantages inherent to the known sieving device can be avoided.
- this can be achieved by shaping the sieve surface with a curved sectional area so that parts of the sieve surface located near the rotary axis and near the outer circumference of the sieve surface are located at a higher level than the intermediate parts of the sieve surface.
- the sieve surface is rotatable about two at least substantially parallel rotary axes.
- means are provided for causing the sieve surface to perform a tilting movement about a pivotal axis extending transversely of the rotary axis of the sieve surface.
- the sieve surface moves up and down, the deflection of the sieve surface increasing with the distance from the rotary axis. Also in this way obturation of the sieve surface is effectively counteracted.
- the sieving device shown in Fig. 1 comprises a circular-section housing 1, the lower part of which is tapering in downward direction.
- a supporting assembly 2 in the housing 1 is arranged a supporting assembly 2 as well as a stationary, continuous gutter 3. With the gutter communicates the top end of an outlet pipe 4, which extends beyond the housing 1.
- a housing 5 in which a vertical, shaft 6 is journalled with the aid of bearings 7.
- the lower end of the shaft 6 is provided with a gear wheel 8, which is coupled with the aid of a toothed rope 9 with a toothed wheel 10 fastened to the shaft of a motor 11 supported by the supporting frame 2.
- the shaft 6 is integral with a shaft 12 extending above the shaft 6, on which shaft 12 a hood 13 is rotatably journalled with the aid of bearings 14.
- the hood 13 is integral with a toothed wheel 15, which is coupled with the aid of a toothed belt 16 with a toothed wheel 17 fastened to the output shaft of an electric motor 18, which is also secured to the supporting frame 2.
- a plate 19 forming part of a conical surface and being downwardly and outwardly inclined away from the hood 13.
- the lower rim of the conical plate 19 is secured by means of a few strips 20 to a continuous sheath 21.
- a sieve surface 22 Between the top rim of the sheath 21 and the hood 13 is provided a sieve surface 22. From Fig. 1 it will be apparent that this sieve surface is curved so that the rim of this annular sieve surface fastened to the hood 13 and the circumferential rim of this sieve surface 22 fastened to the top rim of the sheath 21 are located at a higher level than the part of the sieve surface in between the former.
- the housing On the top side the housing has a central inlet port 23 for the introduction of the material to be sieved.
- Fig. 2 shows that the centre lines of the shafts 6 and 12 may be parallel to one another and be spaced from one another by a distance e.
- said distance e is, for example, 2 mms.
- centre lines of the two shafts may be at an angle m to one another, said angle ⁇ preferably being 35°.
- the centre line of the shaft 12 may intersect the centre line of the shaft 6 in the plane in which the two shafts join one another as is shown in Fig. 3 or in this plane the shafts may again be spaced apart by a distance e as shown in Fig. 4.
- the material moving along the sieve surface After having passed beyond the lowermost point of the sieve surface, designated by A, the material moving along the sieve surface has to move upwards towards the outer rim of the sieve surface. During this upward movement the component of the force of gravity extending parallel to the sieve surface will counteract the centrifugal force. Therefore, by a suitable design of the curved sieve surface 22amost effective displacement of the material along the sieve surface can be ensured, preferably in a manner such that the velocity with which the particles of the material move outwards away from the centre line of the sieve surface remains at least substantially constant, viewed in a horizontal direction.
- the sieve surface rotates not only about the rotary axis formed by the centre line of the shaft 12, but also the shaft 6 carrying the shaft 12 is rotated with the aid of the electric motor 11.
- the sieve surface will perform a swinging movement in a horizontal' sense, the amplitude of the sieve surface being equal to twice the distance e between the centre lines of the two shafts.
- the speed of rotation of the shaft 6 appreciably exceeds that of the sieve surface about the shaft 12 so that the sieve surface will perform a strong rocking movement, which will counteract obturation of the pores of the sieve surface.
- the sieve surface When the shafts are disposed as is shown in Figs. 3 and 4, the sieve surface will, in addition, perform a tilting movement about an imaginary tilting axis at right angles to the centre line of the shaft 6. It will be obvious that as a result the sieve surface will perform upward and downward movements during operation, the deflection of the sieve surface increasing with a growing distance from the rotary axis. This will intensify the sieving effect and contribute to avoidance of clogging of the sieve surface.
Landscapes
- Combined Means For Separation Of Solids (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83200109T ATE26806T1 (de) | 1982-02-02 | 1983-01-25 | Siebmaschine. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8200375 | 1982-02-02 | ||
NLAANVRAGE8200375,A NL177572C (nl) | 1982-02-02 | 1982-02-02 | Zeefinrichting. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0085458A1 true EP0085458A1 (de) | 1983-08-10 |
EP0085458B1 EP0085458B1 (de) | 1987-04-29 |
Family
ID=19839176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83200109A Expired EP0085458B1 (de) | 1982-02-02 | 1983-01-25 | Siebmaschine |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0085458B1 (de) |
JP (1) | JPS58133877A (de) |
AT (1) | ATE26806T1 (de) |
DE (1) | DE3371180D1 (de) |
NL (1) | NL177572C (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110743775A (zh) * | 2019-10-29 | 2020-02-04 | 齐学生 | 一种高效环保的复合肥造粒烘干装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0356689U (de) * | 1989-09-30 | 1991-05-30 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE71863C (de) * | Ph. TAFEL in Augsburg | Flachsichter mit im Kreise schwingender und gleichzeitig kreisender Bewegung | ||
DE440697C (de) * | 1927-02-12 | Otto Wiencke | Umlaufendes Ringtellersieb | |
GB308530A (en) * | 1928-06-26 | 1929-03-28 | Otto Wiencke | Rotary screening plate |
DE862996C (de) * | 1950-09-20 | 1953-01-15 | Hans Muellner | Einlegerahmen fuer Vieleckplansichter |
NL7605572A (nl) * | 1976-05-24 | 1977-11-28 | Coop Landbouw Aan Verkoop | Zeefinrichting voor het scheiden van een mengsel van een grove en een fijne component. |
-
1982
- 1982-02-02 NL NLAANVRAGE8200375,A patent/NL177572C/xx not_active IP Right Cessation
-
1983
- 1983-01-25 EP EP83200109A patent/EP0085458B1/de not_active Expired
- 1983-01-25 DE DE8383200109T patent/DE3371180D1/de not_active Expired
- 1983-01-25 AT AT83200109T patent/ATE26806T1/de not_active IP Right Cessation
- 1983-02-02 JP JP58014707A patent/JPS58133877A/ja active Granted
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE71863C (de) * | Ph. TAFEL in Augsburg | Flachsichter mit im Kreise schwingender und gleichzeitig kreisender Bewegung | ||
DE440697C (de) * | 1927-02-12 | Otto Wiencke | Umlaufendes Ringtellersieb | |
GB308530A (en) * | 1928-06-26 | 1929-03-28 | Otto Wiencke | Rotary screening plate |
DE862996C (de) * | 1950-09-20 | 1953-01-15 | Hans Muellner | Einlegerahmen fuer Vieleckplansichter |
NL7605572A (nl) * | 1976-05-24 | 1977-11-28 | Coop Landbouw Aan Verkoop | Zeefinrichting voor het scheiden van een mengsel van een grove en een fijne component. |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110743775A (zh) * | 2019-10-29 | 2020-02-04 | 齐学生 | 一种高效环保的复合肥造粒烘干装置 |
CN110743775B (zh) * | 2019-10-29 | 2022-11-01 | 宁波嘉鹏机械设备制造有限公司 | 一种复合肥造粒烘干装置 |
Also Published As
Publication number | Publication date |
---|---|
JPH0114828B2 (de) | 1989-03-14 |
NL177572C (nl) | 1985-10-16 |
EP0085458B1 (de) | 1987-04-29 |
DE3371180D1 (en) | 1987-06-04 |
NL8200375A (nl) | 1983-09-01 |
NL177572B (nl) | 1985-05-17 |
ATE26806T1 (de) | 1987-05-15 |
JPS58133877A (ja) | 1983-08-09 |
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