CN202626737U - Head box device - Google Patents
Head box device Download PDFInfo
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- CN202626737U CN202626737U CN 201220244889 CN201220244889U CN202626737U CN 202626737 U CN202626737 U CN 202626737U CN 201220244889 CN201220244889 CN 201220244889 CN 201220244889 U CN201220244889 U CN 201220244889U CN 202626737 U CN202626737 U CN 202626737U
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- flashboard
- flashboards
- doctor
- roll
- weir
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Abstract
The utility model discloses a head box device which comprises a pulp inlet header pipe, a pulp distributing element, a weir tank, flashboards and a lip area, wherein a rectifier roll is arranged in the weir tank; the flashboards consist of an upper flashboard and a lower flashboard which are oppositely arranged; the lower flashboard is a fixed flashboard and is fixedly arranged onto a base plate of a head box; the upper flashboard is a vertically-movable flashboard; and a lower end part of the upper flashboard and an upper end part of the lower flashboard are in diffuse inclined structures facing to the direction of the lip area. According to the flashboards, a flow channel of pulp flows passing though the flashboards is of a gradually enlarged shape and the phenomenon that the pulp flows generate great vortexes after passing through the flashboards due to sudden expansion is avoided; meanwhile, the flow channel formed by the flashboards is positioned at the middle of the weir tank instead of the bottom, so that dead angles on the pulp inlet sides of the flashboards are omitted and great vortexes on the pulp outlet sides of the flashboards are avoided, and the aims of uniformly mixing the pulp flows in the retarding, accelerating and steering processes by changing the geometrical shape and size of the flow channel through the flashboards, eliminating cross flows and transversely and uniformly distributing are achieved and the requirement of leveling on the pulp flows in the process is met.
Description
Technical field
The utility model relates to the pulp and paper technology field, particularly a kind of headbox apparatus.
Background technology
Flashboard is a kind of fairly simple energy dissipating rectifier cell in the head box; Simple in structure, easy to manufacture, Operation and Maintenance aspect; Usually be installed between the doctor-roll,, slurry stream evenly mixed in deceleration, acceleration and steering procedure on the one hand through changing the geometry and the size of runner; Increase the flow resistance of slurry stream on the other hand, when making slurry stream through the runner between flashboard, its energy redistribution, conversion, and accomplish neat and well spaced requirement in this course to slurry stream.
In the existing technology, as shown in Figure 1, from advancing to starch house steward 1 slurry stream; Through cloth slurry element 2 and energy dissipating doctor-roll 3, before flashboard 5, dwindle suddenly, get into runner between flashboard 5 and the base plate 6; Along the direction of slurry stream, the size of runner more and more littler is up to sudden enlargement.The mode of this sudden contraction-convergent-sudden expansion can produce bigger vortex in the sudden expansion process, and the rectification doctor-roll of this vortex back can't eliminate, and eddy current can directly be sprayed onto on the net from lip, thereby can on paper, produce cloudy look-through.
U.S. Pat 5277765 and US5423948 have announced a kind of headbox apparatus of strap brake plate, have solved the problems referred to above, and be as shown in Figure 2; Runner between flashboard 5 and the base plate 6 enlarges gradually; That is to say slurry stream, get into runner between flashboard 5 and the base plate 6, along the direction of slurry stream through cloth slurry element 2 and energy dissipating doctor-roll 3; The size of runner increasing gets into the pond, weir up to further expansion.The mode of this sudden contraction-flaring has been avoided because the sudden expansion process produces bigger vortex, and slurry stream in the flaring runner process, can produce small-scale turbulent flow between through flashboard 5 and base plate 6 simultaneously, helps the even dispersion of fiber and the even distribution of slurry.
But above-mentioned patent; Flashboard 5 is gone into the bottom that runner that base plate 6 forms is positioned at pond, head box weir 4, so just has several problems, and one, form dead angle (" A " as shown in Figure 2) near the position of advancing to starch the liquid level of side weir pond of flashboard 5; Slurry stream slowly causes that easily the wadding of slurry gathers here; Two, near the slurry of the position 4 liquid levels of the pulp side weir pond of flashboard 5 flows also very slowly (" B " as shown in Figure 2); Slurry flows slowly with quick poor through the bigger speed of the slurry stream formation of flashboard 5 here; This fast missionary society forms whirlpool near flashboard pulp side; This whirlpool size is bigger, and the shaping and the cross direction ration that can influence paper distribute; Three, the slurry of 4 bottoms, pond, weir of head box directly gets into lip district 8 through rectification doctor-roll 7 through flashboard 5 runners that are positioned at the bottom, can not produce with the slurry on 4 tops, pond, weir and evenly mix, and this has influenced the distribution of paper moulding and paper stock equally.
Summary of the invention
The purpose of the utility model is to overcome the shortcoming and defect of above-mentioned prior art; A kind of paper machine head box is provided; Solve the prior art slurry through behind the flashboard because sudden expansion produces the technical problem of big vortex, slurry is evenly mixed in deceleration, acceleration and steering procedure.
The utility model is realized through following technical proposals:
A kind of headbox apparatus; Comprise into slurry house steward, cloth slurry element, Yan Chi, flashboard, lip district; The weir is provided with doctor-roll in the pond, and said flashboard is arranged at the middle part in pond, weir, and said flashboard is made up of upper flashboard that is oppositely arranged and lower flashboard; Lower flashboard is fixing flashboard, is fixed on the base plate of head box; Upper flashboard is the movable flashboard that moves up and down; The bottom of said upper flashboard, the upper end of lower flashboard are in the face of lip district direction is the diffusion incline structure.
The bottom of said upper flashboard, the upper end of lower flashboard, in the face of lip district direction is the diffusion incline structure, the inclination angle that its angle of inclination and horizontal plane form is 40 °～60 °.
It is said that to advance to starch house steward be quadrate centrum main pipe or circular cone house steward.
Said cloth slurry element is a kind of in orifice plate, stepped diffuser or the tube bank.
Said doctor-roll is a rectification doctor-roll, is arranged in the pond, weir between the flashboard and lip district.Said doctor-roll can also comprise an energy dissipating doctor-roll and a rectification doctor-roll, is separately positioned on the both sides of flashboard in the pond, weir.
The height of said lower flashboard equals 1/3rd of weir pit level.
Said upper flashboard is identical with the thickness of lower flashboard.
Beneficial effect compared with prior art of the present invention is:
The flashboard of the utility model is made up of upper flashboard that is oppositely arranged and lower flashboard; Lower flashboard is fixing flashboard, is fixed on the base plate of head box the bottom of upper flashboard, the upper end of lower flashboard; In the face of lip district direction is the diffusion incline structure, upper flashboard is the movable flashboard that moves up and down; It is gradually expanded form through the runner of flashboard that the flashboard of this structure makes slurry stream, can not occur behind the flashboard because sudden expansion produces big vortex, simultaneously; The runner that flashboard forms is positioned at the centre in pond, weir, rather than the bottom, thereby neither can enter to starch side generation dead angle at flashboard; Can not produce big whirlpool again in flashboard pulp side; Thereby reach the geometry and the size that change runner through flashboard, slurry stream is evenly mixed in deceleration, acceleration and steering procedure, elimination is flow over; Horizontal equally distributed purpose, and accomplish neat and well spaced requirement in this course to slurry stream.
The utility model technological means is simple and easy to do, has solved slurry with being skillfully constructed and has flow through behind the flashboard because sudden expansion produces the technical problem of maelstrom.
Description of drawings
Fig. 1 is existing strap brake plate current slurry box structure sketch map;
Among the figure: advance to starch house steward 1, cloth slurry element 2, energy dissipating doctor-roll 3, pond, weir 4, flashboard 5, head box base plate 6, rectification doctor-roll 7, lip district 8, labial lamina adjusting device 9.
Fig. 2 is existing US5277765 patent headbox structure sketch map;
Among the figure: advance to starch house steward 1, cloth slurry element 2, energy dissipating doctor-roll 3, pond, weir 4, flashboard 5, head box base plate 6, rectification doctor-roll 7, lip district 8, labial lamina adjusting device 9, dead angle area A, whirlpool district B.
Fig. 3 is a structural representation of the present invention.
Fig. 4 is Fig. 3 flashboard 5 local structure for amplifying sketch mapes.
Fig. 5 is the another kind of structural representation of the utility model.
The specific embodiment
Below in conjunction with specific embodiment the utility model is done further concrete detailed description the in detail, but the embodiment of the utility model is not limited thereto, the technological parameter for not indicating especially can carry out with reference to routine techniques.
Embodiment
Like Fig. 3, shown in 4; The utility model headbox apparatus comprises into slurry house steward 1, cloth slurry element 2, pond, weir 4, flashboard 5, lip district 8, is provided with doctor-roll in the pond, weir 4; Said flashboard 5 is arranged at the middle part in pond, weir 4; Said flashboard 5 is made up of upper flashboard 5A that is oppositely arranged and lower flashboard 5B, and lower flashboard 5B is fixing flashboard, is fixed on the base plate 6 of head box; Upper flashboard 5A is the movable flashboard that moves up and down; The upper end of the bottom of said upper flashboard 5A, lower flashboard 5B, in the face of lip district 8 directions are the diffusion incline structure, promptly planform is symmetrical; Described upper flashboard 5A, upper flashboard 5A, lower flashboard 5B thickness equate that upper flashboard 5A connects screw mandrel 10, through handwheel 11 height up and down.
The upper end of the bottom of said upper flashboard 5A, lower flashboard 5B is the diffusion incline structure in the face of lip district 8 directions, and its angle of inclination is 40 °～60 ° with the inclination angle of horizontal plane formation, in this instance for being 55 °.
The height of said lower flashboard 5B approximates 1/3rd of weir pit level, lower flashboard 5B thickness L=20mm～40mm, and upper flashboard 5A is identical with lower flashboard 5B thickness.The side chamfer radius r that advances to starch of flashboard 5 is 5mm～10mm, and the chamfer radius R of pulp side is 10mm～20mm.
As shown in Figure 3, said doctor-roll comprises an energy dissipating doctor-roll 3 and a rectification doctor-roll 7, is separately positioned on the both sides of flashboard 5 in the pond, weir 4.
As shown in Figure 5, saidly advance to starch house steward 1 and be quadrate centrum main pipe or circular cone house steward; Said cloth slurry element 2 be orifice plate, stepped diffuser or restrain in a kind of; The slurry that stepped diffuser comes out is more uniform and stable, thereby the outlet of cloth slurry element 2 can be disposed energy dissipating doctor-roll 3.That is, when doctor-roll adopted a rectification doctor-roll 7, this rectification doctor-roll 7 was arranged between pond, weir 4 interior flashboards 5 and the lip district 8; When doctor-roll adopts an energy dissipating doctor-roll 3 and a rectification doctor-roll 7 simultaneously, be separately positioned on flashboard 5 both sides (like Fig. 3) in the pond, weir 4.
Angled from the slurry and the horizontal plane that advance to starch house steward 1 through the cloth slurry element 2 entering ponds, head box weir 4; In pond, weir 4, flow through energy dissipating doctor-roll 3, flashboard 5 and 7 energy dissipatings of rectification doctor-roll, neat and well spaced slurry; The loosen collagen fibre wadding gathers; Get into lip district 8 then, behind the horizontal shotcrete thickness of labial lamina adjusting device 9 adjustment head boxs, the 8 whitewashing online from the lip district again.
It is gradually expanded forms through the runner of flashboard 5 that the flashboard 5 of this structure of the utility model makes slurry stream, flashboard 5 backs can not occur because sudden expansion produces big vortex, simultaneously; The runner that flashboard 5 forms is positioned at the centre in pond, weir 4, rather than the bottom, thereby neither can enter to starch side generation dead angle at flashboard 4; Can not produce big whirlpool again in flashboard 5 pulp sides; Thereby reach the geometry and the size that change runners through flashboard 5, slurry stream is evenly mixed in deceleration, acceleration and steering procedure, elimination is flow over; Horizontal equally distributed purpose, and accomplish neat and well spaced requirement in this course to slurry stream.
Just can realize the utility model preferably as stated.
The foregoing description is the utility model preferred implementation; But the embodiment of the utility model is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit and the principle of the utility model, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within the protection domain of the utility model.
Claims (8)
1. headbox apparatus; Comprise into slurry house steward, cloth slurry element, Yan Chi, flashboard, lip district; The weir is provided with doctor-roll in the pond, and said flashboard is arranged at the middle part in pond, weir, it is characterized in that: said flashboard is made up of upper flashboard that is oppositely arranged and lower flashboard; Lower flashboard is fixing flashboard, is fixed on the base plate of head box; Upper flashboard is the movable flashboard that moves up and down; The bottom of said upper flashboard, the upper end of lower flashboard are in the face of lip district direction is the diffusion incline structure.
2. headbox apparatus according to claim 1 is characterized in that: the bottom of said upper flashboard, the upper end of lower flashboard, in the face of lip district direction is the diffusion incline structure, the inclination angle that its angle of inclination and horizontal plane form is 40 °～60 °.
3. headbox apparatus according to claim 1 is characterized in that: said to advance to starch house steward be quadrate centrum main pipe or circular cone house steward.
4. according to each described headbox apparatus in the claim 1 to 3, it is characterized in that: said cloth slurry element is a kind of in orifice plate, stepped diffuser or the tube bank.
5. headbox apparatus according to claim 4 is characterized in that: said doctor-roll is a rectification doctor-roll, is arranged in the pond, weir between the flashboard and lip district.
6. headbox apparatus according to claim 4 is characterized in that: said doctor-roll comprises an energy dissipating doctor-roll and a rectification doctor-roll, is separately positioned on the both sides of flashboard in the pond, weir.
7. headbox apparatus according to claim 4 is characterized in that: the height of said lower flashboard equals 1/3rd of weir pit level.
8. headbox apparatus according to claim 4 is characterized in that: said upper flashboard is identical with the thickness of lower flashboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220244889 CN202626737U (en) | 2012-05-28 | 2012-05-28 | Head box device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220244889 CN202626737U (en) | 2012-05-28 | 2012-05-28 | Head box device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202626737U true CN202626737U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220244889 Expired - Fee Related CN202626737U (en) | 2012-05-28 | 2012-05-28 | Head box device |
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| Country | Link |
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| CN (1) | CN202626737U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691225A (en) * | 2012-05-28 | 2012-09-26 | 华南理工大学 | Flow box device |
| CN109183489A (en) * | 2018-09-25 | 2019-01-11 | 福建锐信合成革有限公司 | A kind of release paper quetsch |
| CN110373931A (en) * | 2019-08-06 | 2019-10-25 | 保定钞票纸业有限公司 | Cylinder mould machine slurry even device |
| CN114182560A (en) * | 2021-12-08 | 2022-03-15 | 浙江华章科技有限公司 | Flow box flow control mechanism, control method and flow box |
-
2012
- 2012-05-28 CN CN 201220244889 patent/CN202626737U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691225A (en) * | 2012-05-28 | 2012-09-26 | 华南理工大学 | Flow box device |
| CN109183489A (en) * | 2018-09-25 | 2019-01-11 | 福建锐信合成革有限公司 | A kind of release paper quetsch |
| CN110373931A (en) * | 2019-08-06 | 2019-10-25 | 保定钞票纸业有限公司 | Cylinder mould machine slurry even device |
| CN110373931B (en) * | 2019-08-06 | 2020-11-13 | 保定钞票纸业有限公司 | Pulp material homogenizing device of cylinder paper machine |
| CN114182560A (en) * | 2021-12-08 | 2022-03-15 | 浙江华章科技有限公司 | Flow box flow control mechanism, control method and flow box |
| CN114182560B (en) * | 2021-12-08 | 2023-07-14 | 浙江华章科技有限公司 | Flow control mechanism and control method for head box and head box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20150528 |
|
| EXPY | Termination of patent right or utility model |