CN102472009A - Headbox for a machine for producing a fibrous web - Google Patents
Headbox for a machine for producing a fibrous web Download PDFInfo
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- CN102472009A CN102472009A CN2010800317399A CN201080031739A CN102472009A CN 102472009 A CN102472009 A CN 102472009A CN 2010800317399 A CN2010800317399 A CN 2010800317399A CN 201080031739 A CN201080031739 A CN 201080031739A CN 102472009 A CN102472009 A CN 102472009A
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- dosage
- input channel
- fluid
- head box
- fibrous substance
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/02—Head boxes of Fourdrinier machines
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/02—Head boxes of Fourdrinier machines
- D21F1/022—Means for injecting material into flow within the headbox
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/02—Head boxes of Fourdrinier machines
- D21F1/024—Details of the feed chamber
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Abstract
The invention relates to a headbox for a machine for producing a fibrous web from a fibrous suspension, having a feed device (4, 5) which feeds the fibrous suspension, having a distributor pipe perforated plate (6) which directly adjoins the feed device in the flow direction of the fibrous suspension, having an intermediate duct (8) which directly adjoins the distributor pipe perforated plate in the flow direction and which has two walls (9.1, 9.2), having a turbulence generating means (10) which directly adjoins the intermediate duct in the flow direction, and having a headbox nozzle (13) which directly adjoins the turbulence generating means in the flow direction, wherein the feed device, the distributor pipe perforated plate and the intermediate duct are arranged in a first plane of alignment (AE.1); and the turbulence generating means and the headbox nozzle are arranged in a second plane of alignment (AE.2), and wherein the two planes of alignment enclose an angle (a) in the range > 90 DEG and < 180 DEG . The headbox according to the invention is characterized in that, on at least one wall (9.2) of the intermediate duct (8), there are arranged a plurality of means (17,17.1), which are arranged spaced apart from one another both in the width direction and also in the longitudinal direction of the headbox, for metering a fluid (18) in partial fluid flows (18.T) into the single fibrous suspension, in that the individual means (17,17.1) comprises a metering duct (19) which has a metering duct opening (19.1) and a metering duct central line (19.M), and in that the respective metering duct opening of the metering duct is aligned such that the metering duct central line of said metering duct impinges on the turbulence generating means so as to form an impingement point (AP).
Description
Technical field
The present invention relates to a kind of used head box of machine of making fiber material web by at least a fibrous substance suspension; Wherein, Fiber material web is paper web, board web or web of tissue paper especially, and this head box has: the transport of carrying at least a fibrous substance suspension; Along the flow direction of at least a fibrous substance suspension be directly connected on the transport and also have a distributing pipe orifice plate of embarking on journey in a large number and becoming the flow channel of row layout; Be directly connected on the distributing pipe orifice plate, that extend along the width of head box and have two center-aisles that preferably have the wall of machine-wide along the flow direction of at least a fibrous substance suspension; Flow direction along at least a fibrous substance suspension is directly connected in turbulent flow generation mechanism on the center-aisle, that have the flow channel of embarking on journey in a large number and becoming the row layout; And be directly connected in the turbulent flow generation mechanism and headbox nozzle that have nozzle gap along the flow direction of at least a fibrous substance suspension; Wherein, Transport, distributing pipe orifice plate and center-aisle are arranged in first pair of flush; And turbulent flow produces mechanism and headbox nozzle is arranged in second pair of flush; And wherein, two to flush press from both sides into one＞90 ° and＜180 ° scope in, preferably>=100 ° and≤170 ° scope in, especially>=110 ° and≤angle in 160 ° of scopes
Background technology
Such head box is for many years known in professional domain, and is for example obtained making and selling with the title of " W type-head box " by Fu Yite (Voith) papermaking company.Such head box preferably is used in the paper machine or board machine of band forming unit, and forming unit has long sieve, just so-called fourdrinier machine sieve.
Be well known that; Newer research and development to the head box of the machine of making fiber material web make: except that making the required original fibrous substance suspension of fiber material web; Also additionally, receive monitoring ground dosage to import a kind of fluid; For example water or the fibrous substance suspension of different materials density is arranged also is called " dilution water " for short in professional domain.This sneaking on a plurality of positions that are distributed on the head box width carried out.At this, can adjust the amount and/or the characteristic of dilution water.Can for example regulate grammes per square metre cross direction profiles curve effectively and/or prevent in head box, to occur cross-current effectively through this measure.
By document DE 41 19 593C2 (" Module Jet ") the technological head box of dilution water that such possessing introduced is disclosed for example.At this, through the inlet opening in the wall of mixing chamber or directly in the turbulent flow generator, with dilution water with divide streamed preferred can control/can regulate dosage import at least a fibrous substance suspension.For the effect to the dilution water of dosage input limits in the part, in mixing chamber, install the next door in some cases.
Like this possess the head box of the dilution water of introducing technology also can equip a kind of dilution water system of selecting else, for example " Jetco ", " annular gap-dosage injection member (Ringspalt-Eindosierung) " or " injecting systems " (Injection System).All known dilution water systems from well-known manufacturing fiber material web machine builder are following systems; Promptly; Said system can be more or less partly satisfies the requirement for following aspect well or only, that is: the well-mixed of fibrous substance suspension and dilution water, volume flow stability, very little working width and very little mapping fully squint (Mapping-Versatz).
However, under many application scenarios, still be proved to be particularly advantageous in the local dosage input of the dilution water head box.This has allowed to support under these circumstances such wish, that is, the head box that head box, especially this paper existing but also that use are well started said type improves according to this novel dilution water technology.For this reason, must remove the parts of the massiveness up to now of head box, and will be tolerated in the excessive risk when being transported to the head box supplier, because only can adopt necessary finishing and adaptive usually in head box supplier there.Owing to lack these parts, head box during this period of time can't use.In addition, the assembling again of the head box after the dismounting is wasted time and energy very much, and under a stable condition, also is attended by technical risk.
Summary of the invention
Task of the present invention is: improve the head box that this paper starts said type as follows, that is: can realize the simple and reliable dilution water of a kind of technology system.In addition, this head box also should allow embodiment with low cost and can realize that downtime, solution was joined in less more favourable refilling
According to the present invention; Start in the head box of said type at this paper; This task is able to solve as follows; That is: preferably have on the wall of machine-wide at least one of center-aisle, arrange a plurality of not only on the width of head box but also head box vertically on be spaced apart from each other, be used for preferably controlling/can divide streamed dosage to import the mechanism of at least a fibrous substance suspension with fluid fluid with regulating; Respectively be used for preferably controlling/mechanism that can divide streamed dosage to import at least a fibrous substance suspension with at least one fluid fluid comprises the dosage input channel with regulating, the dosage input channel possesses dosage input channel opening and dosage input channel center line; And respectively be used for preferably controlling/can regulate ground divides the dosage input channel opening separately of the dosage input channel of the mechanism that streamed dosage imports at least a fibrous substance suspension to be orientated like this with at least one fluid fluid, that is: the dosage input channel center line of this dosage input channel is run in the turbulent flow generation mechanism under formation is collided a little situation.Turbulent flow produces mechanism at this known turbulent flow generator of professional person preferably.
In this way, task according to the present invention is solved fully.
The improvement scheme that this paper is started the head box of said type according to the present invention can realize a kind of technical simple and reliable dilution water system.Even under the situation of maybe the be local very different dilution water yields or Fluid Volume; Also can on the entire machine width, reach good volume flow constancy, and directly get into the interpolation in the zone and in fiber material web, produced thin narrow and effect distinct boundary and feed back (Wirkantwort) what turbulent flow produced mechanism based on dilution water or fluid." spuious the flowing (Vagabundieren) " of the shunting of dilution water or fluid only carries out with very little degree.Through with dilution water or fluid and powerful mixing thing targetedly, position stability ground and preferably can control/can regulate the ground dosage and be input to turbulent flow and produce following in the flow channel of dosage input area back of mechanism; Rely on the independent guiding piece of mixed flow until the initial part that reaches headbox nozzle; Promptly can preferably even fully satisfy requirement as much as possible to the dilution water system of the best.
The improvement project that this paper is started the head box of said type by the present invention also is suitable as a kind ofly to be compared more favourable and assembling scheme again that downtime is less with known improvement project already.Basically, only at least one wall of center-aisle be equipped with a kind ofly be used for preferably controlling/can dilution water or fluid be imported the mechanism of at least a fibrous substance suspension to divide streamed dosage with regulating.All the other members of head box up to now and assembly can exist under situation about not sexually revising as any structure, and can be continued to use.Can be without a doubt and accomplish at the existing regional area that is used for making the machine of fiber material web no trouble at all by the improvement scheme of the head box that this paper is started said type of the present invention.
In first preferred implementation; Respectively be used for preferably controlling/can regulate ground divides the dosage input channel opening separately of the dosage input channel of the mechanism that streamed dosage imports at least a fibrous substance suspension to be orientated like this with fluid fluid; That is: the dosage input channel center line of this dosage input channel preferably almost medially; Especially medially between the gap of two adjacent flow channels, under formation is collided a little situation, run into turbulent flow and produce in the mechanism.This makes the fluid that marks off the dosage input shunt.Because the fluid shunting of dosage input is not to flow directly at least one fluid passage that turbulent flow produces mechanism, so can reach highly stable situation aspect the volume flow constancy.In addition, water-jet pump effect and similar phenomenon are avoided as far as possible, and when fluid shunting conversion volume, only cause slight influence.
Another preferred embodiment is set to: the flow channel of the layout of embarking on journey of turbulent flow generation mechanism has the line-spacing of flow channel; And along being used for of being spaced apart from each other on the width of head box preferably can control/can regulate ground with fluid with fluid divide mechanism that streamed dosage imports at least a fibrous substance suspension, the dosage input channel center line that produces the dosage input channel of the flow channel that the said row of one-tenth of mechanism arranges in turbulent flow of attaching troops to a unit has the line-spacing of dosage input channel center line; Wherein, the line-spacing of dosage input channel center line adopts line-spacing with flow channel preferably identical or be its double value.If two line-spacings all adopt identical value, distribute a row of dosage input channel just for so each provisional capital of flow channel here.Contrast ground with it,, so only give a row that is assigned the dosage input channel in every line of flow channel if the line-spacing of dosage input channel center line adopts the value of double line-spacing in flow channel.The line-spacing of flow channel can for example be taked the value of 25mm, 33mm, 50mm, 66mm or 100mm.
In addition; Another preferred embodiment is set to; Respectively be used for preferably controlling/can regulate ground divides the dosage input channel opening separately of the dosage input channel of the mechanism that streamed dosage imports at least a fibrous substance suspension to be orientated like this with fluid fluid; That is: the dosage input channel center line of this dosage input channel outside or inner at the row of adjacent flow channel run in the turbulent flow generation mechanism under formation is collided a little situation.The scheme of colliding in the outside of dosage input channel center line this can adopt flow channel row distance until 50% value.Thus, can enlarge effectively mutually effectively and meet, from and reach in highly stable situation aspect the volume flow constancy.
Self-evident ground, the dosage input channel center line of dosage input channel also can be in the inside of the row of adjacent flow channel, under formation is collided a little situation, run in the turbulent flow generation mechanism.In this feasible structural scheme, two adjacent flow channels that collide a little then and the turbulent flow of the dosage input channel center line of the dosage input channel of said mechanism produces mechanism align.
In addition; The flow channel that turbulent flow produces the one-tenth row layout of mechanism has the row distance of flow channel; And be used for preferably controlling/can regulate ground with fluid with fluid divide mechanism that streamed dosage imports at least a fibrous substance suspension, the dosage input center line that produces dosage input channel flow channel that the said row of one-tenth of mechanism arrange, that import at differing heights in turbulent flow of attaching troops to a unit has the row distance of dosage input channel center line; Wherein, the row of dosage input channel center line apart from can adopt with the row of flow channel apart from identical or be its double value.If two row are apart from all adopting identical value, all be assigned row of dosage input channel so just to each row of flow channel here.Contrast ground with it, if the row of dosage input channel center line apart from the value that adopts double row distance in flow channel, so only are listed as row that are assigned the dosage input channel to every on the flow channel at a distance from one.
Self-evident ground; Respectively be used for preferably controlling/can regulate ground divides the dosage input channel opening separately of the dosage input channel of the streamed mechanism that fluid dosing is imported at least a fibrous substance suspension also can be orientated like this with at least one; That is, the dosage input channel center line of this dosage input channel medially, or approximate medially; Under the stable condition also slight shift ground under formation is collided a little situation, run on the flow channel of turbulent flow generation mechanism.
Turbulent flow produces flow channels that two adjacent row of one-tenth of mechanism the arrange ground that also can stagger each other, preferably layout each other medially with staggering.Thus, the spacing between the flow channel that the row with adjacent that makes turbulent flow produce mechanism is arranged obviously becomes big.And this impels again effectively meets favourable expansion mutually, from and reached the highly stable situation in volume flow constancy aspect.
Self-evident ground, turbulent flow produce the flow channel of two adjacent row layouts of one-tenth of mechanism and also can not arrange each other with staggering.Thus, the layout lattice (Anordnungsgitter) at right angle have been produced for the flow channel of turbulent flow generation mechanism.
In another embodiment, be used for preferably controlling/can regulate ground divides the dosage input channel of the mechanism that streamed dosage imports at least a fibrous substance suspension to be connected with common service duct with fluid fluid.Thus, realize said mechanism technological superior, do not have defective and embodiment with low cost in flow imaging and technical elements.
In a kind of embodiment of selecting else, be used for preferably controlling/can regulate ground divides each dosage input channel of the mechanism that streamed dosage imports at least a fibrous substance suspension to be connected with the service duct of oneself with fluid fluid.The advantage that this technical comparatively bothersome embodiment is brought is bigger structure feasibility, refers in particular to also the run duration at the machine that is used to make fiber material web.
And; Be used for preferably controlling/can regulate ground divides the dosage input channel opening separately of the dosage input channel of the mechanism that streamed dosage imports at least a fibrous substance suspension to produce mechanism apart from turbulent flow with fluid fluid preferably to have vertical and identical or approximately uniform spacing, this spacing in 1 to 50mm scope, preferably in 3 to 30mm scope, especially in 10 to 30mm scope.Doing the advantage of bringing like this is, the make that under the service condition of the flow imaging of the machine that is used to make fiber material web and technical the best, realizes saving the space.
In addition, be used for preferably controlling/can regulate ground divides the dosage input channel separately of the mechanism that streamed dosage imports at least a fibrous substance suspension to have cross section constant or preferred great-jump-forward expansion in region-type ground at least with fluid fluid.Can improve widening thus along the z direction.
Being used for separately preferably can be controlled/can regulate ground and divide the streamed mechanism that fluid dosing is imported at least a fibrous substance suspension to preferably include the dosage pipe with at least one.This form of said mechanism has characteristic best on the flow imaging, and this external manufacturing technology aspect is also especially suitable.In the case, the dosage pipe can have various known pipe cross sections, that is circle, sub-circular, ellipse, triangle, rectangle, square etc.
In addition; The dosage input channel separately of dosage pipe has rotational symmetric transversal inside face along its dosage input channel center line; And each dosage pipe can have preferred rotational symmetric exterior face; The exterior face diameter is in 3 to 25mm scopes, preferably in 4 to 16mm scopes, especially in 5 to 10mm scopes.Thus, can further improve characteristic on the flow imaging of said mechanism.
Fluid is preferably formed by water, especially clear water; Or form by following fibrous substance suspension; Said fibrous substance suspension refers in particular to mthod of white water from paper making, and the concentration of said fibrous substance suspension is different from the mean concentration of at least a fibrous substance suspension that in head box, flows.These fluid types also have been proved to be only in similarly using.
Be particularly suitable for being applied in the machine that is used for making fiber material web according to head box of the present invention, fiber material web refers in particular to paper web, board web or web of tissue paper.The fiber material web of in having at least one machine by head box of the present invention, making has unsurpassed characteristic, and this is because both can regulate its fiber alignment cross direction profiles curve, also can regulate its grammes per square metre cross direction profiles curve.
Description of drawings
Other feature and advantage of the present invention are by the explanation of next a plurality of preferred embodiments being carried out with reference to accompanying drawing and draw.Wherein:
Fig. 1 illustrates by the vertical of a kind of embodiment of the used head box of machine prior art, that make fiber material web and is schematic profilograph;
Fig. 2 illustrate the machine of making fiber material web used, by the summary of first embodiment of head box of the present invention and also schematic profile;
Fig. 3 illustrate the machine of making fiber material web used, by the summary of second embodiment of head box of the present invention and also schematic profile;
Fig. 4 illustrate the machine of making fiber material web used, by the diagram of the first dosage input scheme of head box of the present invention; And
Fig. 5 illustrate the machine of making fiber material web used, by the diagram of the second dosage input scheme of head box of the present invention;
The specific embodiment
Fig. 1 illustrates by a kind of fibrous substance suspension 2 and makes illustrative embodiments vertical of the used head box 1 of the machine of fiber material webs 3 and be schematic longitudinal sectional drawing.Self-evident ground, shown head box 1 also can be configured to use at least two kinds of different fibrous substance suspensions to make the multilayer head box of fiber material web 3.Fiber material web 3 can refer in particular to paper web, board web or web of tissue paper at this.
For example the distributing pipe orifice plate 6 of triplex row is directly connected on the transport 4 along the flow direction R (arrow) of fibrous substance suspension 2, the flow channel 7 that the distributing pipe orifice plate 6 of this triplex row has a large amount of one-tenth triplex row Z and becomes multiple row S ground to arrange.The row Z number naturally also can less than or greater than 3.
Again directly along the flow direction R (arrow) of fibrous substance suspension 2 be connected with extend along the width B (arrow) of head box 1 and also have two center-aisles 8 that preferably have the wall 9.1,9.2 of machine-wide.
And the turbulent flow with for example triplex row that a large amount of one-tenth triplex row Z arranged and became the flow channel 11 that multiple row S arranges produces mechanism 10 and is directly connected in (referring to Figure 4 and 5) on the center-aisle 8 along the flow direction R (arrow) of fibrous substance suspension 2.The row Z number naturally also can less than or greater than 3.
At head box 1 run duration; Fibrous substance suspension 2 produces in turbulent flow and is divided into the fibrous substance suspension shunting in the mechanism 10; And in a kind of design of the headbox nozzle 13 with nozzle gap 14 produce from turbulent flow come out the mechanism 10 after; In the chamber with machine-wide 12, compile once more, so that can form fiber material web 3 with machine-wide.The flow channel 6 that turbulent flow produces mechanism 10 in known manner preferable configuration become the turbulent pipe of thin-walled and/or possess piecewise constant at least, at least segmentation disperse, the turbulent pipe plug-in unit of segmentation cross section that converge and/or great-jump-forward at least.
Also can in headbox nozzle 13, be furnished with resolution element, especially thin plate that at least one very is familiar with and is not shown specifically for the professional person.If should in headbox nozzle 13, be furnished with a plurality of resolution elements, especially thin plate, these resolution elements can have different length and also have different characteristic where necessary so, like surface profile etc.
In addition, transport 4, distributing pipe orifice plate 6 and center-aisle 8 are arranged among first couple of flush AE.1, and turbulent flow produces mechanism 10 and 13 of headbox nozzle are arranged among second couple of flush AE.2.Two to flush AE.1 and AE.2 press from both sides into one＞90 ° and＜180 ° of scopes in, preferably>=100 ° and≤170 °, especially>=110 ° and≤obtuse angles in 160 ° of scopes.Be that head box 1 has important tumbler 16.
Fig. 2 illustrate be used for by fibrous substance suspension 2 (arrow) make fiber material web machine by the summary of first embodiment of head box 1 of the present invention and also schematic profile.Shown summary part with dashed lines circle K in Fig. 1 illustrates.
The basic structure of head box 1 this summary and that schematically show is basically corresponding to the basic structure of the head box that in Fig. 1, schematically shows 1, thereby also can be with reference to this description of drawings.
Can know that obviously center-aisle 8 is arranged among first couple of flush AE.1, and turbulent flow generation mechanism 10 is arranged among second couple of flush AE.2.Two to flush AE.1, AE.2 press from both sides into one＞90 ° and＜180 ° of scopes in, preferably>=100 ° and≤170 ° of scopes in, especially>=110 ° and≤obtuse angle alpha in 160 ° of scopes.Be that head box 1 has important tumbler 16.
On the upper wall that preferably has machine-wide 9.2 of center-aisle 8, be furnished with a plurality of not only along the width B (arrow) of head box 1 but also be spaced apart from each other along vertical L (arrow) of head box 1, be used for preferably controlling/can regulate ground with the mechanism 17 of fluid 18 with fluid shunting 18.T (arrow) form dosage input fibrous substance suspension 2 (arrow).Based on fluid 18 (arrow) is imported fibrous substance suspension 2 (arrow) with fluid shunting 18.T (arrow) form dosage, obtain to mix shunting 2.1 (arrows) then, these mixing shunting 2.1 (arrows) are accumulated common mixed flow in headbox nozzle.Being used for preferably controlling/can regulate the mechanism's (for example being valve) that ground fluid 18 is imported fibrous substance suspension 2 (arrow) with fluid shunting 18.T (arrow) dosage had been that the professional person is known already, and and then was not shown specifically.
Respectively be used for preferably controlling/regulating the mechanism 17 that ground fluid 18 is imported at least a fibrous substance suspension 2 with at least one fluid shunting 18.T (arrow) form dosage and comprise dosage input channel 19, said dosage input channel 19 has dosage input channel opening 19.1 and dosage input channel center line 19.M.
Being used for separately preferably can be controlled/can regulate the mechanism 17 that ground fluid 18 is imported at least a fibrous substance suspension 2 with at least one fluid shunting 18.T (arrow) form dosage and comprise dosage pipe 17.1.
The dosage input channel 19 separately of dosage pipe 17.1 has rotational symmetric transversal inside face 19.I along the dosage input channel center line 19.M of dosage input channel 19.And each dosage pipe 17.1 also has preferred rotational symmetric exterior face 19.A, this exterior face 19.A has in 3 to 25mm scopes, preferably in 4 to 16mm scopes, the diameter 19.D in 5 to 10mm scopes especially.
In addition, the dosage input channel 19 separately of said mechanism 17 has transversal inside face 19.I constant or that preferred great-jump-forward is widened in region-type ground at least.
And; Respectively be used for preferably controlling/can regulate ground fluid 18 to be imported the dosage input channel opening 19.1 separately of dosage input channel 19 of the mechanism 17 of at least a fibrous substance suspension 2 with at least one fluid shunting 18.T (arrow) form dosage and be orientated like this; That is: the dosage input channel center line 19.M of this dosage input channel 19 runs into turbulent flow and produces in the mechanism 10 under formation is collided the situation of an AP (cross).
In addition, become being used for that row S arranges preferably can control/can regulate fluid 18 is shunted 18.T (arrow) form dosage with fluid import the dosage input channel 19 of the mechanism 17 of at least a fibrous substance suspension 2 and be connected with common service duct 20.This service duct 20 is connected with the unshowned supply system that is used for fluid 18 again; Wherein, Preferably exist at service duct 20 and/or in supply system for the professional person known and and then be not shown specifically, be used for controlling/can regulate the mechanism that dosage is imported fluid 18 (arrow), for example be valve.
Self-evident ground, respectively be used for preferably controlling/can regulate divide each dosage input channel of the mechanism that streamed dosage imports at least a fibrous substance suspension all to be connected with the service duct of oneself in a not shown manner with fluid fluid.
In addition; Respectively be used for preferably controlling/can regulate ground fluid 18 to be imported the dosage input channel opening 19.1 separately of dosage input channel 19 of the mechanism 17 of at least a fibrous substance suspension 2 with at least one fluid shunting 18.T (arrow) form dosage and produced mechanism 10 apart from turbulent flow and have vertical and identical or approximately uniform spacing A, spacing A in 1 to 50mm scope, preferably in 3 to 30mm scopes, especially in 10 to 30mm scopes.The dosage input channel opening 19.1 of the dosage input channel 19 separately of each mechanism 17 is the parallel or approximate approaching side 10.E ground layout that turbulent flow produces mechanism 10 that is parallel to.Self-evident ground, the approaching side that this dosage input channel opening 19.1 also can use unshowned mode and turbulent flow to produce mechanism is arranged at angle.
And, Fig. 3 illustrate be used for by fibrous substance suspension 2 (arrow) make fiber material web machine by the summary of second embodiment of head box 1 of the present invention and also schematic profile.Shown summary part with dashed lines circle K in Fig. 1 indicates.
The basic structure of head box 1 this summary and that schematically show is basically corresponding to the basic structure of the head box that schematically shows among Fig. 11, thereby also can be with reference to this description of drawings.
Can know that obviously center-aisle 8 is arranged among first couple of flush AE.1, and turbulent flow generation mechanism 10 is arranged among second couple of flush AE.2.Two to flush AE.1, AE.2 press from both sides into one＞90 ° and＜180 ° of scopes in, preferably>=100 ° and≤170 ° of scopes in, especially>=110 ° and≤obtuse angle alpha in 160 ° of scopes.Be that head box 1 has important tumbler 16.
On the upper wall that preferably has machine-wide 9.2 of center-aisle 8, be furnished with a plurality of not only along the width B (arrow) of head box 1 but also be spaced apart from each other along vertical L (arrow) of head box 1, be used for preferably controlling/can regulate ground with the mechanism 17 of fluid 18 with fluid shunting 18.T (arrow) form dosage input fibrous substance suspension 2 (arrow).Based on fluid 18 (arrow) is imported fibrous substance suspension 2 (arrow) with fluid shunting 18.T (arrow) form dosage, obtain to mix shunting 2.1 (arrows) then, these mixing shunting 2.1 (arrows) are accumulated common mixed flow then in headbox nozzle.Being used for preferably controlling/can regulate the mechanism's (for example being valve) that ground is imported with fluid shunting 18.T (arrow) dosage by fluid 18 had been that the professional person is known already, and and then was not shown specifically.
Respectively be used for preferably controlling/regulating the mechanism 17 that ground fluid 18 is imported at least a fibrous substance suspension 2 with at least one fluid shunting 18.T (arrow) form dosage and comprise dosage input channel 19, said dosage input channel 19 has dosage input channel opening 19.1 and dosage input channel center line 19.M.
Being used for separately preferably can be controlled/can regulate the mechanism 17 that ground fluid 18 is imported at least a fibrous substance suspension 2 with at least one fluid shunting 18.T (arrow) form dosage and comprise dosage pipe 17.1.
The dosage input channel 19 separately of dosage pipe 17.1 has rotational symmetric transversal inside face 19.I along its dosage input channel center line 19.M.And each dosage pipe 17.1 also has preferred rotational symmetric exterior face 19.A, this exterior face 19.A has in 3 to 25mm scopes, preferably in 4 to 16mm scopes, the diameter 19.D in 5 to 10mm scopes especially.
In addition, the dosage input channel 19 separately of said mechanism 17 has the transversal inside face 19.I that constant or preferred great-jump-forward is widened in region-type ground at least.
And; Respectively be used for preferably controlling/can regulate ground fluid 18 to be imported the dosage input channel opening 19.1 separately of dosage input channel 19 of the mechanism 17 of at least a fibrous substance suspension 2 with at least one fluid shunting 18.T (arrow) form dosage and be orientated like this; That is: the dosage input channel center line 19.M of this dosage input channel 19 runs into turbulent flow and produces in the mechanism 10 under formation is collided the situation of an AP (cross).
In addition, become being used for that row S arranges preferably can control/can regulate fluid 18 is shunted 18.T (arrow) form dosage with fluid import the dosage input channel 19 of the mechanism 17 of at least a fibrous substance suspension 2 and be connected with common service duct 20.This service duct 20 is connected with the supply system of unshowned fluid 18 again; Wherein, Preferably service duct 20 and/or in supply system, exist the professional person known and thereby the mechanism that is not shown specifically, be used for controlling/can regulate dosage input fluid 18 (arrow), for example be valve.
Self-evident ground, respectively be used for preferably controlling/can regulate divide each dosage input channel of the mechanism that streamed dosage imports at least a fibrous substance suspension all to be connected with the service duct of oneself in a not shown manner with fluid fluid.
In addition; Respectively be used for preferably controlling/can regulate ground fluid 18 to be imported the dosage input channel opening 19.1 separately of dosage input channel 19 of the mechanism 17 of at least a fibrous substance suspension 2 with at least one fluid shunting 18.T (arrow) form dosage and produced mechanism 10 apart from turbulent flow and have vertical and identical or approximately uniform spacing A; Spacing A is in 1 to 50mm scope; Preferably in 3 to 30mm scopes, especially in 10 to 30mm scopes.The also parallel or approximate inboard 9.2.I ground that is parallel to the upper wall that preferably has machine-wide 9.2 of center-aisle 8 of the dosage input channel opening of the dosage input channel 19 separately of each mechanism 17 is arranged.Self-evident ground, dosage input channel opening also can be arranged with the approaching side of turbulent flow generation mechanism in a not shown manner at angle.
Figure 4 and 5 show two dosage input schemes by head box 1 of the present invention of the machine that is used to make fiber material web.At this, the flow channel 11 that turbulent flow produces mechanism 10 for example become triplex row Z.1 to Z.3 (Z) and the row that become four corrugated configuration S.1 to S.4 arrange (S).
In these two schemes, the flow channel 11 that Z.1, Z.2 and Z.3 two adjacent row of one-tenth of turbulent flow generation mechanism 10 are arranged is arranged each other with staggering.In two existing accompanying drawings, said flow channel 11 medially arranges each other with staggering, thereby makes descending flow channel 11 Z.1 and up flow channel 11 Z.3 have identical layout along the width B (double-head arrow) of head box 1.
Self-evident ground, turbulent flow produce the flow channel of two adjacent row layouts of one-tenth of mechanism and also can not arrange each other in a not shown manner with staggering.Therefore, the layout lattice at right angle that turbulent flow produces the flow channel of mechanism have been produced.
In addition, also show that be shown in broken lines and that be configured to dosage pipe 17.1, be used for preferably controlling/can regulate ground divides fluid the dosage input channel 19 of the mechanism 17 that streamed dosage imports at least a fibrous substance suspension with fluid dosage input channel opening 19.1.
At this; Each dosage input channel opening 19.1 of the dosage input channel 19 of said mechanism 17 is orientated like this; That is: the dosage input channel center line 19.M of each dosage input channel 19 of said mechanism 17 is approximate medially; Especially medially, under the situation that forms an AP that collides separately, run into turbulent flow and produce in the mechanism 10 S.2 and S.3 at the row of two adjacent flow channels 11.
In addition, turbulent flow produce the embarking on journey Z.1 of mechanism 10, Z.2 and the flow channel of Z.3 arranging 11 have the line-spacing TZ.11 of flow channel.This line-spacing of flow channel can for example adopt the value of 25mm, 33mm, 50mm, 66mm or 100mm.The line-spacing TZ.19.M that has dosage input channel center line along the dosage input channel center line 19.M that produces the dosage input channel 19 of the flow channel 11 that Z.1, Z.2 and Z.3 the said row of one-tenth of mechanism 10 arrange in turbulent flow attaching troops to a unit of mechanism 17 that the width B (arrow) of head box 1 is spaced apart from each other.In two existing accompanying drawings, the line-spacing TZ.19.M of dosage input channel center line adopts the value of double line-spacing TZ.11 in flow channel.Self-evident ground, these two line-spacing TZ.19.M also can adopt identical value with TZ.11.
In addition, turbulent flow produce mechanism 10 the one-tenth row S.2 and the flow channel of S.3 arranging 11 have flow channel row apart from TS.11.And attaching troops to a unit of said mechanism 17 produces row that the dosage input channel center line 19.M in the dosage input channel 19 of differing heights remittance of flow channel 11 that S.1, S.2 and S.3 the said row of one-tenth of mechanism 10 arranges has dosage input channel center line apart from TS.19.M in turbulent flow.
In the diagram of Fig. 4, that is in first scheme, the row of dosage input channel center line adopt row with flow channel apart from the identical value of TS.11 apart from TS.19.M.Therefore, produce all capable each row that Z.1, Z.2 and Z.3 is assigned the dosage input channel 19 of mechanism 17 of the flow channel 11 of mechanism 10 to turbulent flow.Therefore, whole amounts of fibrous substance suspension are all divided streamed fluid to supply with fluid.
And in the accompanying drawing of Fig. 5, that is in alternative plan, the row of dosage input channel center line adopt the value of double row in flow channel apart from TS.11 apart from TS.19.M.Z.1 and Z.3 the row that promptly only produces the flow channel 11 of mechanism 10 to turbulent flow is assigned each row of the dosage input channel 19 of said mechanism 17.Thus, only 2/3 the amount of fibrous substance suspension is divided streamed fluid to supply with fluid.
In Figure 4 and 5; Each dosage input channel opening 19.1 of the dosage input channel 19 of said mechanism 7 also is orientated like this; That is: the dosage of this dosage input channel 19 input center line 19.M is in the row of adjacent flow channel 11 Z.1, Z.2 and Z.3 (Fig. 4) or (Fig. 5) outside Z.1 and Z.3; Under formation is collided the situation of an AP, run into turbulent flow and produce in the mechanism 10.
Self-evident ground, the dosage input channel center line of dosage input channel also can be inner at the row of adjacent flow channel in a not shown manner, under formation is collided a little situation, run in the turbulent flow generation mechanism.
The fluid 18 that in Fig. 2,3,4 and 5 embodiment, uses is formed by water, especially mthod of white water from paper making or clear water at least, or is formed by the fibrous substance suspension that at least a its concentration is different from the mean concentration of at least a fibrous substance suspension 2 (arrow) that in head box 1, flows.
And, the mode combination each other at least in part that head box 1 can be easy to expect in the characteristic of Fig. 2,3, shown in 4 and 5 and embodiment that introduce with the professional person.
What confirm in a word is: improve the head box that this paper starts said type as follows through the present invention, that is, can realize a kind of technical better way dilution water system.In addition, this head box also allows embodiment with low cost, and realizes the downtime of more favourable assembling scheme seldom.
Reference numerals list
1 head box
2 fibrous substance suspensions (arrow)
2.1 mixed flow (arrow)
3 fiber material webs
4 transports
5 transverse distribution pipes
6 distributing pipe orifice plates
7 passages
8 center-aisles
9.1 wall; Lower wall
9.2 wall; Upper wall
9.2.I it is inboard
10 turbulent flows produce mechanism
10.E approaching side
11 flow channels
12 have the chamber of machine-wide
13 headbox nozzle
14 nozzle slits
15 baffle plates
16 tumblers
17 are used for preferably controlling/regulating ground divides streamed dosage input fluid with fluid mechanism
17.1 dosage pipe
18 fluids
18.T fluid shunting (arrow)
19 dosage input channels
19.1 dosage input channel opening
19.2 dosage input block
19.A exterior face
19.D diameter
19.I transversal inside face
19.M dosage input channel center line
20 service ducts
The A spacing
First pair of flush of AE.1
Second pair of flush of AE.2
The AP point (cross) of colliding
B width (arrow; Double-head arrow)
The K circle
L is vertical
R flow direction (arrow)
S; S.1 be listed as
S; S.2 be listed as
S; S.3 be listed as
S; S.4 be listed as
The row distance of TS.11 flow channel
The row distance of TS.19.M dosage input channel center line
The line-spacing of TZ.11 flow channel
The line-spacing of TZ.19.M dosage input channel center line
Z; Z.1 go; Descending
Z; Z.2 go; Up
Z; Z.3 go; Middle line
The α angle
Claims (15)
1. make the used head box (1) of machine of fiber material web (3) by at least a fibrous substance suspension (2); Said fiber material web (3) refers in particular to paper web, board web or web of tissue paper, and said head box (1) has: the transport (4,5) of carrying said at least a fibrous substance suspension (2); Along the flow direction (R) of said at least a fibrous substance suspension (2) be directly connected on the said transport (4,5) and also have in a large number (a Z that embarks on journey; Z, Z.1 to Z.3) and become row (S; S, S.1 to S4) the distributing pipe orifice plate (6) of the flow channel (7) arranged; The flow direction (R) of the said at least a fibrous substance suspension in edge (2) is directly connected in that width (B) on the said distributing pipe orifice plate (6), the said head box in edge (1) extends and has two center-aisles (8) that preferably possess the wall (9.1,9.2) of machine-wide; Along the flow direction (R) of said at least a fibrous substance suspension (2) be directly connected on the said center-aisle (8) and also have in a large number (a Z that embarks on journey; Z, Z.1 to Z.3) and become row (S; S, S.1 to S4) turbulent flow of the flow channel (11) arranged produces mechanism (10); And be directly connected in the said turbulent flow generation mechanism (10) and headbox nozzle (13) that have nozzle slit (14) along the flow direction (R) of said at least a fibrous substance suspension (2); Wherein, Said transport (4,5), said distributing pipe orifice plate (6) and said center-aisle (8) are arranged in first pair of flush (AE.1); And said turbulent flow produces mechanism (10) and said headbox nozzle (13) is arranged in second pair of flush (A E.2); And wherein; These two to flush (AE.1, AE.2) press from both sides into one＞90 ° and＜180 ° scope in, preferably>=100 ° and≤170 ° scope in, especially>=110 ° and≤angle (α) in 160 ° of scopes; It is characterized in that; Preferably possess on the wall (9.2) of machine-wide at least one of said center-aisle (8); Be furnished with a plurality of not only along the width (B) of said head box (1) but also along vertical (L) each interval of said head box (1), be used for preferably controlling/can shunt the mechanism (17,17.1) that (18.T) form is imported fluid (18) dosage said at least a fibrous substance suspension (2) with fluid with regulating; Each is said to be used for preferably controlling/regulating the mechanism (17,17.1) that with at least one fluid shunting (18.T) form fluid (18) dosage is imported said at least a fibrous substance suspension (2) in ground and to comprise dosage input channel (19), and said dosage input channel (19) possesses dosage input channel opening (19.1) and dosage input channel center line (19.M); And each saidly be used for preferably controlling/can regulate the orientation like this of dosage input channel opening (19.1) separately of said dosage input channel (19) that the mechanism (17,17.1) of said at least a fibrous substance suspension (2) is imported fluid (18) dosage with at least one fluid shunting (18.T) form on ground; That is: the dosage input channel center line (19.M) of this dosage input channel (19) is run into said turbulent flow and is produced in the mechanism (10) under formation is collided the situation of point (AP).
2. by the described head box of claim 1 (1); It is characterized in that; Each is said to be used for preferably controlling/can regulate said dosage input channel opening (19.1) the separately orientation like this of said dosage input channel (19) that the mechanism (17,17.1) of said at least a fibrous substance suspension (2) is imported fluid (18) dosage with at least one fluid shunting (18.T) form on ground; That is: the dosage input channel center line (19.M) of this dosage input channel (19) is preferably approximate medially; Especially medially between the row of two adjacent flow channels (11) (S.2 and S.3), under formation is collided the situation of point (AP), run into said turbulent flow and produce in the mechanism (10).
3. by claim 1 or 2 described head boxs (1); It is characterized in that; Said turbulent flow produces the embarking on journey of mechanism (10) (Z, Z.1 to the Z.3) flow channel of arranging (11) and has the line-spacing (TZ.11) of flow channel; And along the width (B) of said head box (1) be spaced apart from each other saidly be used for preferably control/can regulate with fluid shunt (18.T) form fluid (18) dosage is imported said at least a fibrous substance suspension (2) mechanism (17,17.1), attaching troops to a unit has the line-spacing (TZ.19.M) of dosage input channel center line in the dosage input channel center line (19.M) of the dosage input channel (19) of the said flow channel (11) of the said row of one-tenth of said turbulent flow generation mechanism (10) (Z, Z.1 extremely Z.3) layout; Wherein, the line-spacing (TZ.19.M) of said dosage input channel center line adopts and to equal or the value of double line-spacing in said flow channel (TZ.11).
4. by one of aforementioned claim described head box (1); It is characterized in that; Each is said to be used for preferably controlling/can regulate said dosage input channel opening (19.1) the separately orientation like this of said dosage input channel (19) that the mechanism (17,17.1) of said at least a fibrous substance suspension (2) is imported fluid (18) dosage with at least one fluid shunting (18.T) form on ground, that is: the dosage input channel center line (19.M) of this dosage input channel (19) at the row of adjacent flow channel (11) (Z.1, Z.2, Z.3; Z.1, Z.2) outside or inner, under formation is collided the situation of point (AP), run into said turbulent flow and produce in the mechanism (10).
5. by one of aforementioned claim described head box (1), it is characterized in that said turbulent flow produces row that flow channel (11) that the one-tenth row (S, S.1 to S.4) of mechanism (10) arrange has flow channel apart from (TS.11); And saidly be used for preferably controlling/can regulate ground with fluid shunting (18.T) form fluid (18) dosage is imported said at least a fibrous substance suspension (2) mechanism (17,17.1), attaching troops to a unit produces row that the dosage input channel center line (19.M) of the said flow channel dosage input channel (11), that on differing heights, import (19) that the said row of one-tenth (S.2, S.4) of mechanism (10) arrange has dosage input channel center line apart from (TS.19.M) in said turbulent flow; Wherein, the row of said dosage input channel center line apart from (TS.19.M) adopt equal or double row in said flow channel apart from the value of (TS.11).
6. by one of aforementioned claim described head box (1), it is characterized in that two adjacent row of one-tenth of said turbulent flow generation mechanism (10) (Z.1, Z.2; Z.2, Z.3 the flow channel of) arranging (11) is arranged each other with staggering, preferably medially arranges each other with staggering.
7. by one of aforementioned claim described head box (1); It is characterized in that, become the said of row layout to be used for preferably controlling/can to regulate the dosage input channel (19) of fluid (18) dosage being imported the mechanism (17,17.1) of said at least a fibrous substance suspension (2) with fluid shunting (18.T) form in ground to be connected with common service duct (20).
8. by one of claim 1 to 6 described head box (1); It is characterized in that, each is said to be used for preferably controlling/can regulate each dosage input channel (19) of fluid (18) dosage being imported the mechanism (17,17.1) of said at least a fibrous substance suspension (2) with fluid shunting (18.T) form in ground to be connected with the service duct (20) of oneself.
9. by one of aforementioned claim described head box (1); It is characterized in that; Each is said be used for preferably controlling/can regulate ground with at least one fluid shunting (18.T) form fluid (18) dosage is imported the said dosage input channel opening (19.1) separately of said dosage input channel (19) of the mechanism (17,17.1) of said at least a fibrous substance suspension (2) have apart from said turbulent flow produce mechanism (10) vertical and also identical or approximately uniform spacing (A); Said spacing (A) 1 to 50mm; Preferably 3 to 30mm, especially in 10 to 30mm scope.
10. by one of aforementioned claim described head box (1); It is characterized in that, saidly be used for preferably controlling/can regulate ground fluid (18) dosage to be imported the said dosage input channel (19) separately of the mechanism (17,17.1) of said at least a fibrous substance suspension (2) with at least one fluid shunting (18.T) form and had constant or the preferred great-jump-forward transversal inside face (19.I) of widening in region-type ground at least.
11. by one of aforementioned claim described head box (1); It is characterized in that separately said is used for preferably controlling/regulating the mechanism (17) that with at least one fluid shunting (18.T) form fluid (18) dosage is imported said at least a fibrous substance suspension (2) in ground and comprises dosage pipe (17.1).
12., it is characterized in that the said dosage input channel (19) separately of said dosage pipe (17.1) has rotational symmetric transversal inside face (19.I) along its dosage input channel center line (19.M) by the described head box of claim 11 (1).
13. by claim 11 or 12 described head boxs (1); It is characterized in that each said dosage pipe (17.1) has preferred rotational symmetric exterior face (19.A), said exterior face (19.A) has 3 to 25mm; Preferably 4 to 16mm, the diameter (19.D) in 5 to 10mm scopes especially.
14. by one of aforementioned claim described head box (1); It is characterized in that; Said fluid (18) is at least by water; Especially mthod of white water from paper making or clear water form, or are formed by the fibrous substance suspension that at least a its concentration is different from the mean concentration of the said at least a fibrous substance suspension (2) that in said head box (1), flows.
15. be used to make the machine of fiber material web, said fiber material web is meant paper web, board web or web of tissue paper especially, said machine has at least one by the described head box of one of claim 1 to 14 (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009027721A DE102009027721A1 (en) | 2009-07-15 | 2009-07-15 | Headbox for a machine for producing a fiber web |
| DE102009027721.8 | 2009-07-15 | ||
| PCT/EP2010/056135 WO2011006691A1 (en) | 2009-07-15 | 2010-05-06 | Headbox for a machine for producing a fibrous web |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102472009A true CN102472009A (en) | 2012-05-23 |
Family
ID=42829622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800317399A Pending CN102472009A (en) | 2009-07-15 | 2010-05-06 | Headbox for a machine for producing a fibrous web |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20120168105A1 (en) |
| EP (1) | EP2454411A1 (en) |
| CN (1) | CN102472009A (en) |
| DE (1) | DE102009027721A1 (en) |
| WO (1) | WO2011006691A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010001557A1 (en) | 2010-02-03 | 2011-08-04 | Voith Patent GmbH, 89522 | Valve for regulating a fluid flow |
| DE102010001555A1 (en) | 2010-02-03 | 2011-08-04 | Voith Patent GmbH, 89522 | Valve for regulating a fluid flow |
| DE102010028404A1 (en) | 2010-04-30 | 2011-11-03 | Voith Patent Gmbh | Valve for regulating a fluid flow |
| DE102010028403A1 (en) | 2010-04-30 | 2011-11-03 | Voith Patent Gmbh | Valve for regulating a fluid flow |
| DE102010028408A1 (en) | 2010-04-30 | 2011-11-03 | Voith Patent Gmbh | Valve for regulating a fluid flow |
| DE102010030352A1 (en) | 2010-06-22 | 2011-12-22 | Voith Patent Gmbh | Headbox for a machine for producing a fibrous web |
| DE102010038891A1 (en) | 2010-08-04 | 2012-02-09 | Voith Patent Gmbh | Headbox for machine to manufacture e.g. packaging paper web from fibrous material suspension, has partial flow lines arranged adjacent to secondary feed device and arranged non-adjacent to intermediate channel and/or fluid metering units |
| DE102011079715A1 (en) | 2011-07-25 | 2013-01-31 | Voith Patent Gmbh | Headbox for machine for producing fibrous web e.g. paper, has distributor main structure having specified cross-sectional area ratio and width-height ratio |
| DE102011083085A1 (en) * | 2011-09-21 | 2013-03-21 | Voith Patent Gmbh | Headbox for a machine for producing a fibrous web |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2307849B1 (en) * | 1973-02-17 | 1974-06-20 | Voith Gmbh J M | Headbox for a paper machine |
| US4909904A (en) * | 1987-12-09 | 1990-03-20 | J.M. Voith Gmbh | Headbox for a paper machine with dilution feed lines before a turbulence generator |
| CN2273731Y (en) * | 1996-07-19 | 1998-02-04 | 东莞市佳鸣机械制造有限公司 | Air-cushion type pressure pulp flow box |
| US20080023167A1 (en) * | 2004-06-30 | 2008-01-31 | Voith Patent Gmbh | Headbox for Paper Machine |
| DE102007055905A1 (en) * | 2007-12-21 | 2009-06-25 | Voith Patent Gmbh | Head box for machine for producing fibrous material, particularly paper or card board, has fibrous material suspension, where dosing openings of unit are arranged in upstream distance to flow channel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4140657C2 (en) * | 1991-12-10 | 1994-07-14 | Voith Gmbh J M | Headbox |
-
2009
- 2009-07-15 DE DE102009027721A patent/DE102009027721A1/en not_active Withdrawn
-
2010
- 2010-05-06 EP EP10724332A patent/EP2454411A1/en not_active Withdrawn
- 2010-05-06 WO PCT/EP2010/056135 patent/WO2011006691A1/en active Application Filing
- 2010-05-06 CN CN2010800317399A patent/CN102472009A/en active Pending
-
2012
- 2012-01-13 US US13/350,187 patent/US20120168105A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2307849B1 (en) * | 1973-02-17 | 1974-06-20 | Voith Gmbh J M | Headbox for a paper machine |
| US4909904A (en) * | 1987-12-09 | 1990-03-20 | J.M. Voith Gmbh | Headbox for a paper machine with dilution feed lines before a turbulence generator |
| CN2273731Y (en) * | 1996-07-19 | 1998-02-04 | 东莞市佳鸣机械制造有限公司 | Air-cushion type pressure pulp flow box |
| US20080023167A1 (en) * | 2004-06-30 | 2008-01-31 | Voith Patent Gmbh | Headbox for Paper Machine |
| DE102007055905A1 (en) * | 2007-12-21 | 2009-06-25 | Voith Patent Gmbh | Head box for machine for producing fibrous material, particularly paper or card board, has fibrous material suspension, where dosing openings of unit are arranged in upstream distance to flow channel |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2454411A1 (en) | 2012-05-23 |
| DE102009027721A1 (en) | 2011-01-20 |
| WO2011006691A1 (en) | 2011-01-20 |
| US20120168105A1 (en) | 2012-07-05 |
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Application publication date: 20120523 |