CN209033766U - Pressurized screen - Google Patents
Pressurized screen Download PDFInfo
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- CN209033766U CN209033766U CN201690000870.1U CN201690000870U CN209033766U CN 209033766 U CN209033766 U CN 209033766U CN 201690000870 U CN201690000870 U CN 201690000870U CN 209033766 U CN209033766 U CN 209033766U
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- Prior art keywords
- blade
- rotor
- rotation
- pressurized screen
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
- D21D5/023—Stationary screen-drums
- D21D5/026—Stationary screen-drums with rotating cleaning foils
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
It is a kind of for sieving the pressurized screen of fibrous material suspended matter, pressure is sieved into charging space and passing material space by the screen element around sieve Axial-rotational Symmetry, charging space with suspended matter import and waste outlet is connect with the passing material space with passing material outlet, the rotor of cydariform with rotor blade is located in charging space, its rotation axis is consistent with screen axis line and rotates relative to screen element, and rotor blade is distributed in multiple circumferential planes extended perpendicular to rotation axis of rotor.Weaken pulsation in the following way without influencing screening efficiency, that is the cross section of rotor blade extended along direction of rotation includes rounding, the blade tip of direction direction of rotation, blade middle section and blade end part with direction of rotation Opposite direction connection, blade middle section has blade side that is parallel to each other and being parallel to direction of rotation extension, and the height of blade tip and blade middle section is maximum in the outer edge region of rotor blade and reduces towards center.
Description
The utility model relates to a kind of pressurized screens for sieving fibrous material suspended matter comprising rotate around screen axis line
Pressure is sieved into charging space and passing material space by the screen element symmetrically constructed, the screen element, wherein has suspended matter
The charging space of import and waste material defective material outlet in other words connects with the passing material space with passing material outlet
It connecing, and the cylindrical rotor with rotating vane is located in charging space, the rotation axis of the rotor is consistent with screen axis line, and
The rotor relative to screen element rotate, wherein the rotor blade be distributed in rotor it is multiple perpendicular to rotation axis extend
In circumferential plane.
Pressurized screen is used when handling paper fiber material suspension, more precisely in order to handle in wet screening
Fibrous material suspended matter.For this purpose, this pressurized screen includes the screen element equipped with many openings.The fiber for including in suspended matter should
As passing material by the opening, and undesirable solid component is ostracised on it and as waste material from sifter again
It is secondary to be exported.
It is also contemplated that separating shorter fiber from longer fiber for separating different fibre fractionations.
Commonly used circular hole or gap are as screening opening.In most cases, the pressurized screen of type described herein is set
There is sieve remover, the sieve remover has the removing face moved across by sieve.Thus in a way known
Prevent the blocking of screen openings.
A kind of sieve remover as known to patent document WO 98/53135, the sieve remover are equipped with for removing sieve
Blade element.The blade element have fluid dynamic profile, the profile screen element, sieve basket whole length on
Extend.Blade element generates the pressure acted on sieve to be cleaned in front by the relative motion of the suspended matter relative to surrounding
It power momentum and is generated at rear portion and acts on suction momentum on sieve to be cleaned.Suspended matter is rejected on sieve as a result,
Or be sucked back into as passing material by the part of sieve, screen openings are able to unobstructed or are emptied as a result,.
Unlike this, rotor blade is for example in patent document DE-OS 3701669 by convexing to form.
The disadvantageously relatively stronger pulsation based on pressure pulse and suction momentum in known pressurized screen.
Therefore, the technical problem to be solved by the utility model is to make the strong of pulsation in screening efficiency as high as possible
Degree minimizes.
The technical problem solves in the following way according to the utility model, that is, the cross section extended along direction of rotation,
That is the cross section of the radial directed of rotor blade include rounding, be directed toward the blade tip, reversed with direction of rotation of direction of rotation
Ground adjacent blade middle section and blade end part, blade middle section have parallel to each other and are parallel to direction of rotation
The blade side of extension, wherein the height of blade tip and blade middle section is relative to cylindrical rotor surface in rotor leaf
Maximum and from fringe region towards rotor blade center reduces in the outer edge region of piece.
Relatively big height in outer edge region causes the flowing of fibrous material suspended matter to be reinforced, and facilitates in blade
Pressure difference is formed between top and blade end part.
It is combined with the height reduced towards rotor blade center, can thus making pressure pulse, pulse slowly subtracts in other words
It is weak.
When the cross-sectional configuration of blade tip extended along direction of rotation is parabola shaped, forms and be particularly conducive to flow
Dynamic shape.
For enhancing without damage or weakening pressure pulse advantageously, the height of outer edge region is at blade tip
It and is also preferably identical in blade middle part and/or the height of blade tip and blade middle section is in outer edge
Region rear is continuously reduced in transitional region towards center.
In order to make rotor blade play effect as big as possible, especially suction, between fringe region and screen element
Interval should be as small as possible.However, there is the danger blocked in the case where interval too small.
By extensive experiments have shown that optimal, at the minimum interval between the fringe region and screen element of rotor blade
In 3mm between 15mm.
In the use aspect of pressurized screen, people usually distinguish fine screening/fine purifying and coarse fraction/thick purification and height
Concentration material screening or waste material screening.
The purpose finely sieved is for density of material to be in thin in the fibrous material suspended matter between 0.8 and 2.5%
Micro- dirt and clayey removal, wherein the screening opening majority of screen element is configured to joint-cutting.
On the other hand, coarse fraction and the screening of high concentration material or waste material screening are made every effort to density of material being in 2.0 Hes
Dirt in fibrous material suspended matter and clayey removal between 5%.Screening opening is both it is so structured that hole, may be designed in
Joint-cutting.
Fine sieve timesharing is being made to fibrous material suspended matter, due to relatively low density of material, is being made to strengthen rotor
With advantageously, the minimum interval between the fringe region and screen element of rotor blade is between 3mm and 7mm and/or rotor
Rotation speed be between 13m/s and 20m/s.
When the density of material of fibrous material suspended matter is relatively high, in order to sieve or give up in coarse fraction or high concentration material
Material screen by stages between realize the optimal suction based on rotor blade, the minimum between the fringe region and screen element of rotor blade
Interval should be between 7mm and 15mm and/or the rotation speed of rotor should be between 16m/s and 25m/s.
When applying at the wood pulp field and paper pulp field for papermaking, pressurized screen has in the material between 1% and 5%
Expect density range, and has in 3mm between the fringe region and screen element of rotor blade between the minimum between 15mm
Gap.Here, the small gap width of 3mm to 7mm is preferably applied in the lower density of material between 1% and 2.5%, and
And the larger gap width of 7mm to 15mm is applied in the higher material density between 2.0% and 5%.
In view of the effect that is formed to pressure difference advantageously, the width of outer edge region is from blade tip towards blade end
Part is preferably continuously reduced.
In order to weaken pressure pulse gradually, the height of blade end part is in reverse to direction of rotation and preferably continuously subtracts
It is small.Herein it is also advantageous that the blade side of blade end part extends in parallel with each other and with being parallel to direction of rotation.
Generally speaking, rotor blade can be observed along direction of rotation and be designed to be significantly shorter than common rotor blade, this is opened up
The feasible program that wide rotor blade is arranged on rotor.
In order to avoid vortex, the blade side of blade end part should be rounding.In addition, blade end part should
With the end side extended perpendicular to direction of rotation.
In order to make the even action of rotor blade and especially also make the vortex generated due to rotor blade uniform, favorably
, the rotor blade of adjacent circumferential plane arranges with offsetting each other along direction of rotation.
In order to realize the lateral flow for extending axially through screen element, rotation axis should be favoured or be put down perpendicular to machine
Face.
In addition, advantageously, rotor is in the inside of screen element, screen element construction in terms of the structure and function of pressurized screen
For column and rotor is configured to columnar drum.
The utility model is further described with reference to embodiments.In the accompanying drawings:
Fig. 1, which is schematically shown, is parallel to the drawing in side sectional elevation that 17 cutting pressurized screen of rotation axis obtains；
Fig. 2 shows the top views of rotor blade 3；
Fig. 3 show rotor blade 3 perspective view and
Fig. 4 shows the drawing in side sectional elevation of rotor blade 3 extended perpendicular to rotation axis 17.
It can see the pressurized screen with screen element 11 according to the utility model in Fig. 1, here, the shape of the screen element
Formula is that the column with vertical screen axis line 10 sieves basket, which is divided into charging 12 He of space for the inner space of pressurized screen
Passing material space 13.
Fibrous material suspended matter 1 inputs in charging space 12 via suspended matter import 14.
In the pressurized screen used here, fibrous material suspended matter 1 obtains rotation impulse, which makes fibrous material
Suspended matter carries out circular motion.As the supplement to this, due to the suspended matter import 14 for being plotted in top in charging space 12
Existing pressure drop generates traffic flow between underlying waste outlet 15.
On the route of the traffic flow, the major part of fibrous material suspended matter 1 passes through 11 conduct of screen element by regulation ground
Passing material 20 is exported in passing material space 13, and is brought out from this via passing material outlet 16.Here, extremely
It less include that the major part of the fiber in fibrous material suspended matter 1 is also transferred to passing material space 13.
Fibrous material suspended matter 1 is repelled the part refused in other words by screen element 11 as waste material 21 via waste outlet
15 export from charging space 12.
The opening of screen element 11 is blocked in order to prevent, should using sieve remover known per se scaler in other words
Sieve remover is moved relative to screen element 11.
According to the utility model, the sieve remover is formed by the rotor 2 rotated in screen element 11, rotor blade 3
It fixes on the rotor.Here, rotor 2 has the shape of columned drum, wherein rotation axis 17 is consistent with screen axis line 10.
According to Fig. 2 to Fig. 4, all rotor blades 3 are of similar shape herein, this, which is realized, suspends to fibrous material
The stepless action of object 1 and screen element 11.
In addition, rotor blade 3 is distributed in multiple circumferential planes 18 extended perpendicular to rotation axis 17 of rotor 2.So
And importantly, multiple rotor blades 3 are arranged in circumferential plane 18, and the rotor blade 3 of circumferential plane 18 is along rotation side
It is completely covered to 7.
In order to make the even action of rotor blade, the rotor blade 3 of adjacent circumferential plane 18 offsets each other along direction of rotation 7
Ground arrangement.In addition, rotor blade 3 is not only of similar shape also is of the same size herein, it reduce manufacturing costs.
In order to reduce flow losses and promote the formation of pressure difference, the transversal mask of rotor blade 3 extended along direction of rotation 7
Among blade having rounding, being directed toward the blade tip 4 of the parabolic shape of direction of rotation 7, oppositely connect with direction of rotation 7
Part 5 and blade end part 6, blade middle section have in parallel with each other and are parallel to the leaf of 7 ground of direction of rotation extension
Piece side 9, wherein the height of blade tip 4 and blade middle section 5 it is maximum in the outer edge region 8 of rotor blade 3 and from
Fringe region 8 reduces towards the middle.
Blade tip 4 disposes fibrous material suspended matter 1, flowing velocity and pressure difference quilt in parallel blade side 9
It improves, and there is the reflux be conducive in the region for reducing height by screen element 11 in adjacent.
Here, the height of outer edge region 8 is identical at blade tip 4 and blade middle section 5, this facilitates pressure difference
It is formed and is allowed using the rotor blade 3 than common rotor blade much shorter.
In the pressurized screen designed for fine screening fibrous material suspended matter 1, the fringe region 8 and sieve of rotor blade 3
Minimum interval 23 between element 11 is between 3mm and 7mm and/or the rotation speed of rotor 2 be in 13m/s and 20m/s it
Between.
If coarse fraction of the pressurized screen for fibrous material suspended matter 1 or the high concentration for fibrous material suspended matter are sieved
Or waste material screening, then the minimum interval 23 between the fringe region 8 and screen element 11 of rotor blade 3 is between 7mm and 15mm
And/or the rotation speed of rotor 2 is between 16m/s and 25m/s.
In order to slowly reduce pressure again and make minimum pulsation, the height of blade tip 4 and blade middle section 5 exists
It is continuously reduced in transitional region after outer edge region 8 towards center.
Due to identical, the width of outer edge region 8 is continuously reduced from blade tip 4 towards blade end part 6,
And the height of blade end part 6 is in reverse to direction of rotation 7 and is continuously reduced.
The seamed edge 22 extended between edge region 8 and transitional region is also curved and helps leniently to import back
Stream.
Fig. 2 and Fig. 3 are shown, and the trend of the seamed edge 22 can be adapted to special use condition and for example also only in leaf
Extend in piece middle section 5.
In order to be vortexed minimum, the blade side 9 of blade end part 6 extend perpendicular to direction of rotation 7 it is transversal
It is rounding in face.
In addition, the blade side 9 of blade end part 6 extends parallel to each other and is parallel to the extension of direction of rotation 7.Here,
Blade end part 6 has the end side 19 extended perpendicular to direction of rotation 7.This also contributes to slowly weakening pressure pulse.
Claims (17)
1. one kind has and is rotationally symmetrically constructed around screen axis line (10) for sieving the pressurized screen of fibrous material suspended matter (1)
Screen element (11), the screen element by pressure be sieved into charging space (12) and passing material space (13), wherein have hang
The charging space (12) of floating object import (14) and waste outlet (15) is empty with the passing material with passing material outlet (16)
Between (13) connect, and with rotor blade (3) cydariform rotor (2) be located at charging space (12) in, the rotation of the rotor
Unanimously, and the rotor is rotated relative to screen element (11) for shaft axis (17) and screen axis line (10), wherein the rotor blade
(3) it is distributed in multiple circumferential planes (18) extended perpendicular to rotation axis (17) of rotor (2), wherein rotor blade (3)
Along direction of rotation (7) extend cross section include rounding, be directed toward direction of rotation (7) blade tip (4), be in reverse to rotation
The blade middle section (5) and blade end part (6) connected to direction (7), blade middle section have in parallel with each other
And the blade side (9) extended with being parallel to direction of rotation (7), wherein the blade tip (4) and blade middle section (5)
Height it is maximum in the outer edge region (8) of rotor blade (3) and reduce from fringe region (8) towards center, feature
It is, the blade tip (4) is designed as parabola shaped.
2. pressurized screen described in accordance with the claim 1, which is characterized in that the height of the outer edge region (8) is in the blade
Top is identical at (4).
3. pressurized screen described in accordance with the claim 1, which is characterized in that the height of the outer edge region (8) is in the blade
Middle section is identical at (5).
4. pressurized screen described in accordance with the claim 1, which is characterized in that the fringe region (8) and sieve member of the rotor blade (3)
Minimum interval (23) between part (11) is in 3 between 15mm.
5. pressurized screen according to claim 4, which is characterized in that in order to carry out essence to the fibrous material suspended matter (1)
Dusting cover point, minimum interval (23) between the fringe region (8) and screen element (11) of the rotor blade (3) in 3 to 7mm it
Between.
6. pressurized screen described in accordance with the claim 1, which is characterized in that in order to carry out fine sieve to fibrous material suspended matter (1)
Point, the rotation speed of the rotor (2) is in 13 between 20m/s.
7. pressurized screen according to claim 4, which is characterized in that thick in order to be carried out to the fibrous material suspended matter (1)
Screening or high concentration screening or waste material screening, the minimum between the fringe region (8) and screen element (11) of the rotor blade (3)
It is spaced (23) and is in 7 between 15mm.
8. pressurized screen described in accordance with the claim 1, which is characterized in that thick in order to be carried out to the fibrous material suspended matter (1)
Screening or high concentration screening or waste material screening, the rotation speed of the rotor (2) are in 16 between 25m/s.
9. pressurized screen described in accordance with the claim 1, which is characterized in that the blade tip (4) and blade middle section (5)
Height is continuously reduced in transitional region after the outer edge region (8) towards middle ground.
10. pressurized screen described in accordance with the claim 1, which is characterized in that the width of the outer edge region (8) is from blade tip
(4) reduce towards blade end part (6).
11. pressurized screen described in accordance with the claim 1, which is characterized in that the width of the outer edge region (8) is from blade tip
(4) continuously reduce towards blade end part (6).
12. pressurized screen described in accordance with the claim 1, which is characterized in that the height of the blade end part (6) is in reverse to rotation
Turn direction (7) reduction.
13. pressurized screen described in accordance with the claim 1, which is characterized in that the height of the blade end part (6) is in reverse to rotation
Turn direction (7) continuously to reduce.
14. pressurized screen described in accordance with the claim 1, which is characterized in that the blade side (9) of the blade end part (6)
It extends parallel to each other and is parallel to direction of rotation (7) extension.
15. pressurized screen according to claim 14, which is characterized in that the blade side (9) of the blade end part (6)
It is rounding.
16. pressurized screen described in accordance with the claim 1, which is characterized in that the blade end part (6) has perpendicular to rotation
The end side (19) that direction (7) extends.
17. pressurized screen described in accordance with the claim 1, which is characterized in that rotor blade (3) edge of adjacent circumferential plane (18)
Direction of rotation (7) is arranged with offsetting each other.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015210252.1 | 2015-06-03 | ||
| DE102015210252 | 2015-06-03 | ||
| PCT/EP2016/062480 WO2016193364A1 (en) | 2015-06-03 | 2016-06-02 | Pressure screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209033766U true CN209033766U (en) | 2019-06-28 |
Family
ID=56101452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201690000870.1U Active CN209033766U (en) | 2015-06-03 | 2016-06-02 | Pressurized screen |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN209033766U (en) |
| AT (1) | AT15802U1 (en) |
| FI (1) | FI11964U1 (en) |
| WO (1) | WO2016193364A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364274A (en) * | 2020-04-30 | 2020-07-03 | 郑州磊展科技造纸机械有限公司 | Novel pressure screen |
| CN111424458A (en) * | 2020-04-30 | 2020-07-17 | 郑州磊展科技造纸机械有限公司 | Pressure screen rotor using airfoil-shaped rotary wing panel and pressure screen |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7416588B2 (en) * | 2019-09-04 | 2024-01-17 | フォイト パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング | Screen devices and rotors for screen devices |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI92227C (en) * | 1992-04-23 | 1994-10-10 | Ahlstroem Oy | Apparatus for processing the fiber suspension |
| US5307939A (en) * | 1992-07-13 | 1994-05-03 | Ingersoll-Rand Company | Screening apparatus for papermaking pulp |
| US5497886A (en) * | 1992-07-13 | 1996-03-12 | Ingersoll-Rand Company | Screening apparatus for papermaking pulp |
-
2016
- 2016-06-02 WO PCT/EP2016/062480 patent/WO2016193364A1/en active Application Filing
- 2016-06-02 CN CN201690000870.1U patent/CN209033766U/en active Active
- 2016-06-02 AT ATGM9007/2016U patent/AT15802U1/en unknown
-
2017
- 2017-11-30 FI FIU20174273U patent/FI11964U1/en active IP Right Grant
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364274A (en) * | 2020-04-30 | 2020-07-03 | 郑州磊展科技造纸机械有限公司 | Novel pressure screen |
| CN111424458A (en) * | 2020-04-30 | 2020-07-17 | 郑州磊展科技造纸机械有限公司 | Pressure screen rotor using airfoil-shaped rotary wing panel and pressure screen |
Also Published As
| Publication number | Publication date |
|---|---|
| FI11964U1 (en) | 2018-02-16 |
| WO2016193364A1 (en) | 2016-12-08 |
| AT15802U1 (en) | 2018-07-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |