CN100427679C - Paper machine web forming device for pulse pressure drived dewatering plate - Google Patents
Paper machine web forming device for pulse pressure drived dewatering plate Download PDFInfo
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- CN100427679C CN100427679C CNB2006100357419A CN200610035741A CN100427679C CN 100427679 C CN100427679 C CN 100427679C CN B2006100357419 A CNB2006100357419 A CN B2006100357419A CN 200610035741 A CN200610035741 A CN 200610035741A CN 100427679 C CN100427679 C CN 100427679C
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Abstract
The present invention discloses a paper machine net clamping former of a pulse pressure driving dewatering plate, which comprises a bottom net, a flow box, a top net, a forming roller, dehydrating plates, a floating roller, air chambers, a pushing rod and a support frame, wherein both sides of the top net and the bottom net which are between the forming roller and the floating roller are provided with a plurality of pair of dehydrating plates, and the top end of the dehydrating plate is provided with a T-shaped groove. Each dehydrating plate is connected with the corresponding air chamber by the pushing rod connected with the T-shaped groove, the air chambers at the same side of the top net and the bottom net are mutually communicated, and the dehydrating plates are symmetrically and alternatively arranged on the top net and the bottom net. The acting force of the dehydrating plates of the present invention to the net part can be controlled in a pneumatic mode, the strong pulse and extrusion force is generated, the dehydrating capability is increased. The dehydrating capability is gradually reinforced along the running direction of the net, the loss of fibre and filling materials is reduced, and simultaneously, the present invention can apply the pressure or reduce pressure to the net part to make fibre suspension generate a minute turbulent fluctuation, and thus, the uniformity of paper sheet is improved. The present invention is particularly suitable for a high-speed paper machine.
Description
Technical field
Patent of the present invention relates to pulping and paper-making equipment and technical field, is specifically related to the paper machine Aladdin former that a kind of fluctuation pressure drives dewatering plate.
Background technology
The transfer rate of modern paper machine has reached about 2000m/min, and fabric width is more than 10m.Under such operating mode, realize that the fast dewatering of paper web, even shaping are the most basic requirements to former.In high-speed paper machine, Aladdin former has been represented state-of-the-art technical equipment at present, and external large-scale paper machine is made enterprise and related scientific research unit and declared for the research and development of novel Aladdin former and patent and all drop into great effort.Because Aladdin former has advantages such as double side dewatering, sealing shaping, compact conformation, therefore be applicable to high-speed paper machine more.
In nearly decades, Aladdin former has experienced long-term developmental research and constantly perfect, though its structure and complex forms are various, the mechanism that is shaped and the dewatering elements of use all adopt folder net double dewatering to make paper sheet formation much at one.This class former pulp suspension all is to be shaped with the tapered region dehydration that certain angle is injected between two nets that breast roll supports by head box, and top net and spacer screen all have circuit system separately.Wherein dehydration comprises forming rolls, dewatering plate, suction flat box, suction couch roll etc. with forming element, the quantity and the arrangement form of dewatering elements have nothing in common with each other, this is the highest equipment of present Aladdin former, is mainly used in the production of printing paper, writing paper, newsprint and tissue paper.
Though Aladdin former has been represented the advanced technology of web part of paper machine shaping, still is further improved in the following aspects:
1, improves the structure and the layout thereof of dewatering plate, further improve the effect of Aladdin former dehydration.
2, novel pressure fluctuation dewatering plate is set to improve the dehydration and the homogenate ability of Aladdin former at drying zone.This pressure fluctuation dewatering plate can better make folder net double dewatering, has increased the pulsation of slurry simultaneously, and fiber is evenly distributed at banner direction.
Summary of the invention
The purpose of patent of the present invention is to improve the dewatering elements of existing paper machine Aladdin former, provides a kind of fluctuation pressure to drive the paper machine Aladdin former of dewatering plate.Further improve the water separation capability of Aladdin former, and improve page and all spend quality.
Purpose of the present invention is achieved through the following technical solutions:
A kind of fluctuation pressure drives the paper machine Aladdin former of dewatering plate, comprise spacer screen, head box, the top net, forming rolls, dewatering plate, floating roller, top net and spacer screen are supported by forming rolls and floating roller respectively, top net between forming rolls and floating roller and spacer screen both sides are provided with many to dewatering plate, dewatering plate comprises the leading edge plane, the leading edge supporting surface, the inclined-plane, the leading edge plane is a horizontal plane, its rear end is connected with the inclined-plane, inclined-plane and leading edge plane form dehydration angle α, the front end on leading edge plane is connected with the leading edge supporting surface, form toe angle β, head box is positioned at the two forming rolls outside, described paper machine Aladdin former also comprises air chamber, catch bar and support, described dewatering plate top has T-slot, and each dewatering plate is by stent support, and is connected with corresponding air chamber by the catch bar that is connected with T-slot, the described air chamber that is positioned at top net and spacer screen one side all is interconnected, and described dewatering plate is the interval symmetric arrangement on top net and spacer screen.Useful is that described dehydration angle α is 1～5 °.
Useful is that described toe angle β is 30～60 °.
Useful is, the mode that the described air chamber that is positioned at top net and spacer screen the same side all is interconnected is that air chamber is connected with same air supply header by breather line respectively, and air supply header is connected with air compressor.Its purpose is the uniformity of guarantee effect power.Also can be to adopt existing other air chamber connection technology.
Principle of the present invention: the catch bar of dewatering plate is connected with air chamber, regulate the actuating pressure of dewatering plate by the air in the compression air chamber, make it along the fine motion up and down of wet end vertical direction, produce fluctuation pressure, to adapt to the dehydration requirement of different fibrous suspensions and network speed.The actuating pressure of pressure fluctuation dewatering plate and wet end can be regulated in online pulsation.Simultaneously, dewatering plate is the interval symmetric arrangement on top net and spacer screen, it is fixed that the group number can come according to actual conditions, two groups of dewatering plates are exerted pressure to wet end under the fluctuation pressure effect simultaneously, pressure fluctuation makes the suspension between net become shear flow, not only improve the dewatering efficiency of whole Aladdin former, also made fiber reach the effect that collective disperses, improved the uniformity of paper web.
Compared with prior art, the present invention has following advantage:
1, because dewatering plate can be controlled by pneumatic mode the active force of wet end, and therefore whole multifoil shoe can produce stronger pulse and extruding force, improves water separation capability.
2, because of adopting the air in the special-purpose air chamber of compression to regulate air pressure, so this dewatering plate can apply lasting, stable fluctuation pressure to the folder net in the high-speed cruising, makes water separation capability along the mild increase of the direction of network operation, reduced the loss of fiber and filler.
3, dewatering plate interval symmetric arrangement in the loop of top net and spacer screen, two groups of dewatering plates are exerted pressure or are reduced pressure wet end simultaneously under the fluctuation pressure effect, make fibrous suspension produce small turbulent flow pulsation, have improved the uniformity of page.
Description of drawings
Fig. 1 drives the paper machine Aladdin former structural representation of dewatering plate for fluctuation pressure;
Fig. 2 is dewatering plate and air chamber annexation enlarged diagram.
The specific embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing, but embodiment of the present utility model is not limited thereto.
As shown in Figure 1, the paper machine Aladdin former that fluctuation pressure drives dewatering plate comprises spacer screen 1, head box 2, top net 3, forming rolls 4,22, dewatering plate 7,9,11,17,19,21, floating roller 13,14, top net 1 and spacer screen 3 are respectively by forming rolls 4,22 and floating roller 13,14 support, be positioned at forming rolls 4,22 and floating roller 13, top net 1 between 14 and spacer screen 1 both sides are provided with many to dewatering plate 7,9,11,17,19,21, as shown in Figure 2, described dewatering plate 7,9,11,17,19,21 comprise leading edge plane 23, leading edge supporting surface 27, inclined-plane 24, leading edge plane 23 is a horizontal plane, its rear end is connected with inclined-plane 24, inclined-plane 24 forms dehydration angle α with leading edge plane 23, the front end on leading edge plane 23 is connected with leading edge supporting surface 27, form toe angle β, head box 2 is positioned at two forming rolls 4,22 outsides, described paper machine Aladdin former also comprises air chamber 8,10,12,16,18,20, catch bar 26 and support 6, each dewatering plate top has T-slot body 25, dewatering plate 7,9,11,17,19,21 are fixed on the support 6, and catch bar 26 and corresponding air chamber 8 by being connected with T- slot 25,10,12,16,18,20 connect, the air chamber that is positioned at top net 3 and spacer screen 1 one sides all is interconnected, it specifically is the air chamber 8 that is positioned at top net one side, 10,12 or the air chamber 16 of spacer screen the same side, 18,20 all are communicated in same air supply header, air supply header is connected with air compressor, need to prove, described air chamber 8,10,12,16,18 and 20 is to be connected with air supply header by breather line, also can adopt existing other air chamber connection technology.Described dewatering plate 7,9,11,17,19,21 is the interval symmetric arrangement on top net 1 and spacer screen 1; Catch bar 26 is reserved certain spatial degrees of freedom in T-slot 25, with the convenient fluctuation pressure of regulating.
Material preparations such as above-mentioned dewatering plate 7,9,11,17,19,21 useful ceramics, high density ethylene.According to producing needs, the water separation capability that suction flat box further improves Aladdin former can be installed between dewatering plate simultaneously.The air chamber of the fluctuation pressure dewatering plate in top net and the spacer screen is by same compressor and common air chamber's air feed, uniformity that like this can guarantee effect power, air compressor select for use and the installation of each air chamber intercommunication pipeline fixed according to on-site actual situations.The catch bar of dewatering plate is identical with single cylinder with the action principle of air chamber, and under compressed-air actuated effect, catch bar travels forward and drives dewatering plate wet end is exerted pressure, and resetting of catch bar then relies on reposition element such as spring etc.
During work, fibrous suspension 5 by head box 2 be ejected into two the net between tapered region, and two the net between crack in move forward, meanwhile two the net squeezing actions under carry out double dewatering.Specifically be that dewatering plate leading edge plane 23 contacts with the screen cloth of top net and spacer screen, and water off the net is wiped off, long inclined-plane 24 is arranged after the leading edge plane 23, form wedge shape space and induce vacuum, be implemented in whereby under the vacuum that relaxes and dewater, in general, leading edge plane 23 length L
1Be 10-15mm, inclined-plane 24 length L
2Be 30-60mm.Owing to the effect of fluctuation pressure, the vacuum that wedge shape space is induced increases gradually, has improved the dewatering efficiency of former simultaneously.On the other hand, because dewatering plate is the interval symmetric arrangement in the loop of top net and spacer screen, under the effect of dewatering plate pressure, the screen cloth of top net and spacer screen and leading edge supporting surface are close to, the toe angle β that leading edge supporting surface and leading edge plane form, in general, the β value is big more, and dewatering plate is big more to the pressure of screen cloth.Therefore, toe angle β and dehydration angle α are the important parameters that influences dewatering efficiency, and dehydration angle α can be 1～5 °.Toe angle β can be 30～60 °.Fibrous suspension 5 form fibrage respectively on the surface of top net and spacer screen two net inboards, and a sandwich part still has the pulp suspension liquid layer of flow behavior in the reach process.The two groups of dewatering plates 7,9,11 and 17,19,21 that are installed in top net 3 and the spacer screen 1 are exerted pressure to wet end under the control of pulsation air pressure simultaneously, the fibrous suspension 5 that is clipped in the middle is compacted and is fixed on the net, but middle part suspension still carries out filtering means dehydration through the fibrage and the net on two sides, until the connection of two fibrages is in aggregates up and down, form the l Water Paper page or leaf.Because the effect of pressure fluctuation dewatering plate, along two net travel directions, formed the state that positive negative pressure replaces, this fibrous suspension that makes produces microturbulence in the process that is shaped and fiber disperses again, improved the uniformity of l Water Paper page or leaf, more than variation all is to finish in the two online moment of high-speed cruising.Wherein, the quantity of two groups of dewatering plates determines that according to actual condition the air chamber that connects the dewatering plate catch bar communicates, and is synchronous with the fluctuation pressure and the action time of guaranteeing each dewatering plate.In the dehydration of above-mentioned fibrous suspension 5, the fluctuation pressure that dewatering plate acts on wet end is along on the direction of wet end operation, presents malleation, negative pressure alternately.The situation of this pressure fluctuation and distribution not only can improve the water separation capability of Aladdin former, also makes the distribution of fiber in the l Water Paper page or leaf more even, and the intensity of fluctuation pressure and frequency require to decide according to producing actual and dewatering.
Fluctuation pressure of the present invention drives the paper machine Aladdin former of dewatering plate, and is not only simple in structure, and control is easy, with existing paper The machine Aladdin former is compared, and can increase online the water separation capability of Aladdin former and the uniformity of raising page according to need of production. Simple because of pneumatic control, avoided conventional dewatering plate to regulate support bracket fastened loaded down with trivial details operation, more suitable in factory's practice. The technology of the present invention can be fit to installing and using on all kinds of paper machines, particularly high-speed paper machine Aladdin former. In a word, the present invention makes The whole water separation capability of paper machine Aladdin former significantly improves, and simultaneously because of preferably double dewatering and fiber dispersion effect, therefore makes Getting the l Water Paper page or leaf has the better uniformity, makes product quality rise to enterprise and brings huge economic benefit.
Claims (4)
1, a kind of fluctuation pressure drives the paper machine Aladdin former of dewatering plate, comprise spacer screen, head box, the top net, forming rolls, dewatering plate, floating roller, top net and spacer screen are supported by forming rolls and floating roller respectively, top net between forming rolls and floating roller and spacer screen both sides are provided with many to dewatering plate, dewatering plate comprises the leading edge plane, the leading edge supporting surface, the inclined-plane, the leading edge plane is a horizontal plane, its rear end is connected with the inclined-plane, inclined-plane and leading edge plane form dehydration angle (α), the front end on leading edge plane is connected with the leading edge supporting surface, form toe angle (β), head box is positioned at the two forming rolls outside, it is characterized in that, described paper machine Aladdin former also comprises air chamber, catch bar and support, described dewatering plate top has T-slot, and is connected with corresponding air chamber by the catch bar that is connected with T-slot, the described air chamber that is positioned at top net and spacer screen one side all is interconnected, and described dewatering plate is the interval symmetric arrangement on top net and spacer screen.
2, drive the paper machine Aladdin former of dewatering plate according to the described fluctuation pressure of claim 1, it is characterized in that described dehydration angle (α) is 1～5 °.
3, drive the paper machine Aladdin former of dewatering plate according to the described fluctuation pressure of claim 1, it is characterized in that described toe angle (β) is 30～60 °.
4, drive the paper machine Aladdin former of dewatering plate according to the described fluctuation pressure of claim 1, it is characterized in that the mode that the described air chamber that is positioned at top net or spacer screen the same side all is interconnected is that air chamber is connected with same air supply header by breather line respectively, air supply header is connected with air compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100357419A CN100427679C (en) | 2006-05-31 | 2006-05-31 | Paper machine web forming device for pulse pressure drived dewatering plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100357419A CN100427679C (en) | 2006-05-31 | 2006-05-31 | Paper machine web forming device for pulse pressure drived dewatering plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1851119A CN1851119A (en) | 2006-10-25 |
| CN100427679C true CN100427679C (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100357419A Expired - Fee Related CN100427679C (en) | 2006-05-31 | 2006-05-31 | Paper machine web forming device for pulse pressure drived dewatering plate |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113388906A (en) * | 2021-07-19 | 2021-09-14 | 赣州龙邦材料科技有限公司 | Aramid fiber winding-prevention washing equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0627524A1 (en) * | 1993-05-18 | 1994-12-07 | Valmet Paper Machinery Inc. | Web former in a paper machine |
| US5871617A (en) * | 1995-03-27 | 1999-02-16 | Mitsubshi Jukogyo Kabushiki Kaisha | Paper machine twin-wire former with dewatering limiting blade device |
| US20040188051A1 (en) * | 2001-10-03 | 2004-09-30 | Metso Paper, Inc. | Method and apparatus for draining fibre pulp suspension |
-
2006
- 2006-05-31 CN CNB2006100357419A patent/CN100427679C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0627524A1 (en) * | 1993-05-18 | 1994-12-07 | Valmet Paper Machinery Inc. | Web former in a paper machine |
| US5871617A (en) * | 1995-03-27 | 1999-02-16 | Mitsubshi Jukogyo Kabushiki Kaisha | Paper machine twin-wire former with dewatering limiting blade device |
| US20040188051A1 (en) * | 2001-10-03 | 2004-09-30 | Metso Paper, Inc. | Method and apparatus for draining fibre pulp suspension |
Non-Patent Citations (2)
| Title |
|---|
| 造纸原理与工程（第二版）. 卢谦和等，230-231，中国轻工业出版社. 2006 |
| 造纸原理与工程（第二版）. 卢谦和等，230-231，中国轻工业出版社. 2006 * |
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| CN1851119A (en) | 2006-10-25 |
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Granted publication date: 20081022 Termination date: 20130531 |