CN101522986A - Sealing elements in a twin-wire paper machine - Google Patents
Sealing elements in a twin-wire paper machine Download PDFInfo
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- CN101522986A CN101522986A CNA2007800374046A CN200780037404A CN101522986A CN 101522986 A CN101522986 A CN 101522986A CN A2007800374046 A CNA2007800374046 A CN A2007800374046A CN 200780037404 A CN200780037404 A CN 200780037404A CN 101522986 A CN101522986 A CN 101522986A
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- net
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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
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
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Abstract
The present invention relates to a twin-wire press (50) for dewatering of a fibre suspension, comprising an endless lower wire (1.0) and an endless upper wire (12), an upper wire guiding member (20), a lower wire guiding member (18), such that a tapering dewatering space (6) is formed between the upper and lower wire guiding members, and sealing members (54) extending from an inlet box (8). The sealing members (54) in the twin-wire press comprises an upper and lower substantially form-stable sealing element (54', 54''), respectively, that in the tapering space (21) between the upper and lower wire guiding members (18, 20) is sealingly arranged against the upper and lower wire (10, 12), respectively.
Description
Technical field
The present invention relates to two net squeezers.
Background technology
Be used for fibrous suspension is dewatered and two net squeezers of forming its continuous webs of paper are previously knowns.Usually with paper pulp from the inlet pulp density for the 3-8% percentage by weight dewater to export pulp concentration be the 30-50% percentage by weight.According to the prior art state, this pair of net squeezer comprises lower roll, the endless lower wire of extending along the path that centers on this lower roll, top roll and the endless upper wire of extending along the path that centers on this top roll.Two nets are assisted each other along the dewatering period in described path and are joined, and at this dewatering period, two nets are in the wedge shape dehydration space that is formed for fibrous suspension each other.In the process of described dewatering period displacement, two nets are the fibrous suspension in the squeezing wedge shape dehydration space continuously therefore at two nets, thus fibrous suspension is initially squeezed and dewaters, and form continuous fibrous web between two nets.
Inlet tank is supplied to wedge shape dehydration space between two nets with fibrous suspension.Known two net squeezers also are included in two drainage foils of supporting respective wire in the dewatering period in described path, thereby wedge shape dehydration space be formed on two nets with the roll structure that is positioned at after the drainage foil (the time) along the direction of motion observation of net between, so that the fibrous web between two nets is finally squeezed and dewaters, thereby fibrous web will reach the mass dryness fraction of being wanted.Along the longitudinal direction of two nets, in wedge shape dehydration space, the porous dehydration part is arranged, these porous dehydration parts are arranged to against two nets in the outside, dehydration space.The filtrate flow that forms is crossed two nets and porous dehydration part, is guided to the upper outlet case and the following EXPORT CARTON that are arranged on the drainage foil place respectively.Upper outlet case and following EXPORT CARTON can be divided into several chambers respectively, flow through respectively thus the filtrate of top dehydration part and bottom dehydration part can two or more chambers in corresponding EXPORT CARTON in the filtrate of part.
Traditional two net squeezers comprise the seal that is top elastic seal blade and bottom elastic seal blade form, this top elastic seal blade extends into wedge shape dehydration space and is arranged to hermetically against online at this from inlet tank, and this bottom elastic seal blade extends into dewater space and be arranged to hermetically against off line at this of wedge shape from inlet tank.Form the passage that between inlet tank and wedge shape dehydration space, passes through for fibrous suspension between top seal blade and the lower seal blade.The end of sealing blade be usually located at dehydration in the space than short distance.The common thickness of sealing blade is about 1.5-2mm.
In traditional double net squeezer, it is very complicated to be used for the geometry setting that has the inlet tank of regulating the sealing blade that fibrous suspension is supplied to the wedge shape dehydration space between two nets is got up, to obtain correct and suspension flow that wanted.Before two net squeezers put into operation for a long time in, described geometry is carefully tested through test of many times and check.Therefore distance between the geometry of inlet tank and the two sealing blades fixes.The thickness increase of sealing blade can cause the distance between two blades to reduce, and this then is undesired.In addition, because the free end of sealing blade bears against the inboard of net in the dehydration space, so can promote and reduce drainage foil hardly to change the geometry in wedge shape dehydration space.Therefore, the thickness of sealing blade applies restriction for the possibility that generation in two net squeezers has the fibrous web of different grammes per square metres, especially low grammes per square metre.
Known sealing blade must be flexible, because they will fully seal and be pressed against on the net owing to the overvoltage that fibrous suspension produced of process.The sealing blade extends along the whole width of machine, and this width is generally four to five meters.Smooth sealing blade makes the inboard of sealing supporting blades against net to obtain correct glacing flatness, this also is very complicated and time-consuming.In this, it also is very difficult and time-consuming changing the sealing blade, and this must finish and mean for production time and so cost waste at shutdown period.
In order to deal with erosion environment, existing known sealing blade is made by acid resisting steel.Although the sealing blade is formed from steel, because existing some filler the plain boiled water from paper machine circulations to fiber raw material, these sealing blades still wear and tear very fast.This especially seals the precipitation of carbide form on the blade owing to steel and can take place.The hardness of sealing blade is increased to above the hardness of carbide to reduce the wearing and tearing for the sealing blade, and this just means that the essential elasticity that seals blade can reduce.
If it is too big that the wearing and tearing of known seal blade become, then net can damage, under worse situation even can break.For this reason, must before the risk that might damage net, in time change the sealing blade.Because the sealing blade is in the wearing and tearing of two net squeezer run durations, its actual life is shorter.Obviously, as mentioned above, the installation and the replacing of sealing blade are very time-consuming so very expensive.Because known sealing blade is formed from steel, very difficulty is therefore also very expensive so they manufacture.
In two net squeezers of the above-mentioned type, be arranged on the net guide at the entrance place of two net squeezers in addition.The net guide is made by corresponding crooked metal sheet, and corresponding net is against thereon, and the net guide has substituted those rollers that use at the entrance place of two net squeezers usually.On the net guide, also can wear and tear, since the too many wearing and tearing on the net guide, the risk that also has net to damage.Net guide self is expensive.Install and more the draping guide also be time-consuming and expensive.
Summary of the invention
The present invention is intended to eliminate at least in part those shortcomings that are associated with above-mentioned prior art state.General purpose of the present invention is that the seal for two net squeezers improves.Specifically, purpose is to realize the seal that the life-span is longer and/or realize for the more simple of seal and replacing rapidly in two net squeezers.Another purpose is can be in the geometry in the space of the dehydration of the wedge shape between the adjusted drainage foil more.Another purpose is to reduce the wearing and tearing of seal.In addition, purpose is to reduce the cost of the seal that is used for changing and make two net squeezers.In addition, purpose is also to reduce the cost of the net guide that is used for changing and make two net squeezers.
This purpose realizes two net squeezers that fibrous suspension dewaters according to of the present invention being used for a kind of, this pair net squeezer comprises endless lower wire and endless upper wire, endless lower wire and endless upper wire limit microscler dehydration space, in the shifting process of net, fibrous suspension will dewater in the dehydration space.In addition, this pair net squeezer comprises: inlet tank is used for fibrous suspension is supplied to the dehydration space at the arrival end place in dehydration space; Bottom porous dehydration part and upper porous dehydration part, bottom porous dehydration part and upper porous dehydration part are arranged in the outside in dehydration space against net; The upper outlet case is used to collect the filtrate of crossing online and upper porous dewatering elements from the dehydration spatial flow; Following EXPORT CARTON is used to collect and crosses off line and filtrate bottom porous dewatering elements from the dehydration spatial flow.The upper wire guide is arranged to online is tiltedly down guided into the arrival end in dehydration space, and the lower wire guide is arranged to guide the arrival end in space that dewaters obliquely into off line, thereby forms cone space between upper wire guide and lower wire guide.In addition, this pair net squeezer comprises upper seal and the lower seal of extension from inlet tank, be used for net and enter the dehydration space suspension between seal.Upper seal and lower seal are defining the passage that is used for flowing to from inlet tank for fibrous suspension the dehydration space each other.Seal comprises upper wedge seal and lower wedge seal, in the cone space between upper wire guide and lower wire guide, the upper wedge seal is arranged to hermetically against online, in the cone space between upper wire guide and lower wire guide, the lower wedge seal is arranged to hermetically against off line.Each seal has first side and second side, and first side defines a described part that is used for the passage of fibrous suspension, and second side is extended and is arranged to seal at least in part setting against the net that is associated towards first side with an acute angle.The characteristics of this pair net squeezer are, seal be provided with the online of the arrival end place in dehydration space and off line between distance equate substantially, be formed for the distance between the paper supply mass suspension flows to the space of dewatering from inlet tank first side of respective seals of passage.
Compare with the conventional seals blade of the accurate glacing flatness of needs, replacing and the assembling of seal in two net squeezers is more uncomplicated.According to the present invention, to compare with the sealing blade that tradition is used, the production cost of seal and the installation in two net squeezers and replacement cost can reduce, because the off-time can significantly reduce.In addition, according to one embodiment of the invention, if the net guide that is used in two net squeezers forms wear-out part, it is changed and production cost also can reduce, and will be more apparent in this detailed description hereinafter.
When we mentioned that in the following description seal is arranged to hermetically against the net guide, what we wanted to explain was that net is arranged between seal and the net guide.
The statement of " wedge shape " and " wedge shape " by relating to seal designs of the present invention wants to refer to that seal has conical in shape.This comprises that also seal can have the shape of cutting sth. askew.Therefore, describe in detail as below description, the seal of wedge shape comprises that or adjacently situated surfaces opposite with another of seal is in a ratio of the surface of inclination.Yet the taper form is taper continuously not necessarily.
According to an embodiment, corresponding seal only seals adjoining farmland neighbour and supports the respective wire guide. and therefore, seal of the present invention needn't be charged into the dehydration space as the situation of conventional seals blade.In this, flowing to from inlet tank for fibrous suspension the passage in dehydration space, can be in the identical distance of distance between acquisition between upper seal and the lower seal is surfed the Net with the real arrival end place in the space of dewatering and be off line.This causes the advantage aspect output, thereby can begin dehydration earlier in the dehydration space.Traditional sealing blade place, end at the sealing blade in the dehydration space forms doorsteps, and pulp suspension carries the spatial joint clearance of part to increase several millimeters at the place, end of sealing blade in the dehydration space, and this can influence and be shaped and dehydration.According to the solution of the present invention, can obtain the level and smooth more transition that relaxes in the end part of pulp suspension by seal, this causes the better shaping and the dehydration of pulp suspension.In addition, since paper pulp thinner thickness that should the zone between the arrival end place drainage foil in dehydration space, the grammes per square metre step-down, and this wants for the character of two net squeezers very much.
Seal can have certain elasticity/flexibility, but can get back to its original-shape when load reduces.Therefore, the distortion of seal is not permanent.Because like this, respective seals can be designed to the elastomer of wedge shape, can prolong the life-span of seal and even can reduce wear.Select by suitable material, seal of the present invention can provide the rigidity of being wanted.Therefore, the conventional thin that can exempt for prior art seals the existing to alignment request of blade.In addition, this helps making seal with various materials, or even other material except metal.The situation of the sealing blade that uses with tradition is compared, and seal of the present invention helps production more with low cost, assembling and replacing.
Each seal has wedge-shaped cross section.In this, each seal has first side and second side, and first side defines a described part that is used for the passage of fibrous suspension, and second side is extended and is arranged to seal at least in part setting against the net that is associated towards first side with an acute angle.Other design of seal also can change over the geometry that is suitable for various pulp environments and other pair net squeezer.
According to one embodiment of the invention, seal can be arranged to its position and can regulate along the longitudinal direction of two net squeezers towards the net guide.According to another embodiment, the net guide is arranged to towards seal along the vertical direction adjustable ground.According to an embodiment, the net guide can form one with the porous dehydration part of being arranged to against the respective wire of dehydration in the space.By the wedge-type shape of seal, in this, according to an embodiment, when net guide and porous dehydration part formation one, the distance in dehydration space can changing along moving horizontally of the direction of shifting to and move apart the net guide respectively by seal.According to another embodiment, the net guide can comprise the porous dehydration part that connects at least to the arrival end in dehydration space, thereby can be when pulp suspension enters between the drainage foil and after pulp suspension passes through seal, promptly leave the end part of seal, begin dehydration immediately against the respective wire guide at corresponding net.
Two net guides can be respectively arranged with wear-out part on the surface of respective wire.Wear-out part can be designed to the replaceable wearing terrain on the net guide.Wear-out part is made by polymer suitably.In this, can prolong the life-span of the net guide of two net squeezers.Respective seals and respective wire guide have following shape suitably, and this shape is along the form fit each other at least in part of adjacent part of supporting part each other, and promptly corresponding geometry fits each other.
Seal can be made by the polymer such as polyethylene basically, and verified these seals can very ideally be resisted the wearing and tearing in the various pulp environments, and the wearing and tearing that carbide caused that opposing is formed by filler on very large degree.In this, can prolong the life-span of the seal of two net squeezers.
The net guide not necessarily has any elasticity.The wear-out part of net guide also can be made by the stone material such as ceramic material.Therefore, according to one embodiment of the invention, since a starting point, the net guide can be referred to as to control the shape of seal.The net guide is not necessarily flexible, but seal can be flexible suitably.
In addition, seal and net guide can be designed to surface treated metal-cored, the outside of this surface treatment such as plastic material.
From appending claims, also from the description of following embodiment, additional preferable feature of the present invention, advantage and preferred embodiment meeting become apparent.
Description of drawings
To come more detailed description the present invention by the embodiment of reference accompanying drawing now, and to the hard-core meaning of the present invention, in the accompanying drawing:
Fig. 1 with partial illustration meaning show the vertical section at the entrance place of traditional double net squeezer,
Fig. 2 A with partial illustration meaning show the vertical section at entrance place of two net squeezers of one embodiment of the invention,
Fig. 2 B with partial illustration meaning show the vertical section at entrance place of two net squeezers of one embodiment of the invention, and
Fig. 2 C schematically shows vertical section by two net squeezers of one embodiment of the invention with general view, and this pair net squeezer can comprise any in Fig. 2 A and the 2B illustrated embodiment.
The specific embodiment
For the sake of clarity, at first traditional two net squeezers are described referring to Fig. 1, Fig. 1 schematically shows the part of the entrance 3 of traditional double net squeezer 2, says so exactly in inlet tank 8 parts and zone on every side, one section of arrival end 4 places in dehydration space 6.In the process of net 10,12 displacements, fibrous suspension to be drained off is supplied to dehydration space 6 from inlet tank 8, and this dehydration space 6 is defined by endless lower wire 10 and endless upper wire 12. Porous dehydration part 14,16 is at adjacent two nets that support in the outside, dehydration space.These porous dehydration parts use along the whole length L 1 in dehydration space, to remove filtrate from the dehydration space.Be arranged on the entrance of two net squeezers net guide 3 places, shown in Figure 1 18,20 and made by crooked metal sheet, corresponding net moves against the net guide respectively, and the net guide has substituted at normally used those rollers of the entrance of two net squeezers.Net guide 18,20 have the inclined surface 18 that corresponding net moves against it ', 20 ', the longitudinal extension range L 2 of inclined surface forms an acute angle with the longitudinal extension range L 1 in dehydration space.Therefore, upper wire guide 20 is arranged to online is tiltedly down guided into the arrival end in dehydration space, and lower wire guide 18 is arranged to the arrival end of guiding the dehydration space obliquely into off line.Like this, between upper wire guide and lower wire guide, form cone space 21.Filtrate is crossed net 10,12 from the dehydration spatial flow, and is collected in the EXPORT CARTON 22,24.Be arranged on down following EXPORT CARTON 22 in the drainage foil and collect from the dehydration spatial flow and cross off line 10 and the filtrate of bottom dehydration part, collect to cross and surf the Net 12 and the filtrate of top dehydration part from the dehydration spatial flow and be arranged on upper outlet case 24 in the drainage foil.In addition, traditional two net squeezers comprise is arranged to be connected directly to the porous dehydration part 14,16 of extension from the sealing blade 26,28 of inlet tank 8, the adjacent respective inside 30,32 of supporting the net 10,12 in the dehydration space of the free end of sealing blade.
Below, with reference to the embodiment shown in Fig. 2 A-C of the present invention pair of net squeezer described.For the embodiment of the invention shown in Fig. 2 A-C, corresponding traditional characteristic spare and parts are used with the identical Reference numeral of the entrance of traditional double net squeezer shown in Figure 1 and are indicated.
Fig. 2 A-B shows the entrance 51 of of the present invention pair of net squeezer 50, and two net squeezers 2 of itself and Fig. 1 are similar, shows dehydration space 6, inlet tank 8, endless lower wire 10, endless upper wire 12, porous dehydration part 14,16, net guide 18,20, cone space 21 and EXPORT CARTON 22,24.Dehydration space 6 has arrival end 52.
Shown in the embodiment among Fig. 2 A of the present invention and the B, two net squeezers 50 comprise seal 53,54, these seals be corresponding seal 53 ', the form of 53 ＂, 54 ', 54 ＂, be arranged on each side at arrival end 52 places in the dehydration space 6 that is connected directly to inlet tank 8.Seal 53 ', 53 ＂, 54 ', 54 ＂ extend along the whole width (perpendicular to the paper among Fig. 2 A and the 2B) of two net squeezers basically.Upper seal 53 ＂, the sealing adjoining farmland neighbour is supported online 12 in the cone space 21 of 54 ＂ between upper wire guide 18 and lower wire guide 20.Lower seal 53 ', the sealing adjoining farmland neighbour supports off line 10 in 54 ' the cone space between upper wire guide 18 and lower wire guide 20.Upper seal and lower seal 53 ', 53 ＂, 54 ', 54 ＂ defining each other one for fibrous suspension from inlet tank 8 flow to the dehydration space 6 passage 55.According to one embodiment of the invention, corresponding seal 53 ', 53 ＂, 54 ', 54 ＂ only seal adjoining farmland neighbour basically and support corresponding net guide 18,20.According to previous conventional seals blade, the also adjacent dehydration part 14,16 (referring to Fig. 1) that supports.
Shown in Fig. 2 A and 2B, corresponding seal 53 ', 53 ＂, 54 ', 54 ＂ have along the wedge-shaped cross section shown in the longitudinal direction L1 of two net squeezers, it shows first side 56 and second side 60, this first side 56 defines the part of described passage 55, and this second side 60 away from this first side and described passage and in contrast.In addition, corresponding seal shows the 3rd side 61 that is set to inlet tank 8.Corresponding net against the inclined surface 18 of respective wire guide 18,20 ', 20 ' and move.According to the present invention, by the corresponding inclined surface 18 that is resisted against the net guide ', 20 ' on, corresponding inclined surface on second side 60 of seal 53,54 realizes sealing.
Therefore,, leave the position of the end 58 of seal, between sealing surfaces and dehydration space, realize relaxing level and smooth transition at corresponding net 10,12 according to the present invention.
According to the present invention, shown in Fig. 2 A, with corresponding free end 58 places of the seal that supports of respective inside neighbour of net, first side 56 and second side 60 part of meeting in both sides forms the sharp-pointed part 57 of taper of ligule.Respective seals that Here it is and the respective wire guide that is associated can have an example of following at least design suitably, and along the form fit each other at least in part of the adjacent sloping portion that supports part each other, promptly corresponding geometry fits each other.
Return the common description of two embodiment shown in Fig. 2 A and the 2B, seal 53 ', 53 ＂, 54 ', 54 ＂ can comprise the depression 62 such as groove or similar structures, this depression 62 can be installed on the track or similar attachment on the inlet tank.Seal can be arranged to its position against the net guide can be along the longitudinal direction L1 of two net squeezers, along the horizontal direction adjusting, and especially for the seal 54 shown in Fig. 2 B, this is a preferred embodiment.Net guide 18,20 along the vertical direction adjustable ground be arranged to against seal 53 ', 53 ＂, 54 ', 54 ＂.
According to the present invention, the distance H 1 that distance H 2 between first side of passing through from inlet tank for fibrous suspension 56 passage 55, respective seals 53,54 is embodied as between the online 10 and off line 12 with the real entrance in the space 6 of dewatering is substantially the same with forming.According to the solution of the present invention, can provide the transition of level and smooth more mitigation by end 58 parts of seal at fibrous suspension.
Described seal 53 ', 53 ＂, 54 ', 54 ＂ are suitably by polymer moieties ground or fully make.Polymer for example can be a polyethylene.
In the embodiment shown in Fig. 2 A-B, net guide 18,20 against the inclined surface 18 of each net 10,12 ', 20 ' be provided with the wear-out part 64,66 that is removable wearing terrain form.Wear-out part for example can be ceramic material or polymer.Wear-out part for example is a polyethylene.Wear-out part can be designed to independent field-replaceable unit, and these parts can be brought to or push open by groove on the body of net guide or track.
According to an embodiment (not shown), net guide 18,20 can form one with porous dehydration part 14,16, promptly is arranged to be connected in one, with the respective wire of neighbour in the dehydration space.According to an embodiment, when net guide and porous dehydration part form one, when promptly forming one, the distance H 1 in dehydration space in this can be by seal along the longitudinal direction L1 of two net squeezers, along respectively towards changing with moving horizontally of direction away from the net guide.The net guide can comprise and dehydration space adjacent porous dehydration part (not shown) at least in part, thereby leaves the position of the respective end 58 of seal at corresponding net, can begin dehydration immediately at the arrival end place in dehydration space.
Fig. 2 C moves with the example that view shows whole pair of net squeezer 50, and this pair net squeezer 50 can comprise the entrance 51 shown in Fig. 2 A of the present invention and the 2B embodiment.Two net squeezers 50 comprise three lower rolls, the driven roller 100 of more specifically saying so, guide roller 102 and strain roll 104.Above-mentioned endless lower wire 10 is along the path operation around lower roll 100,102,104.Along the path operation around three top rolls, these three top rolls are driven roller 106, guide roller 108 and strain roll 110 specifically in a corresponding way for above-mentioned endless upper wire 12.Above-mentioned upper outlet case 24 in the last drainage foil of supporting online 12 and support dehydration space 6 between the above-mentioned EXPORT CARTON down 22 formation nets 10,12 in off line 10 the following drainage foil.Two net squeezers comprise above respectively referring to Fig. 2 A and the described seal 53,54 of the present invention of Fig. 2 B (not shown in Fig. 2 C) shown in Fig. 2 C.Two net squeezers comprise the conventional roll structure 112 according to the prior art state.
In the running according to the two net squeezers shown in Fig. 2 A-C, the rotation by roller 100-110 realizes moving of net 10,12.Fibrous suspension to be drained off is fed to dehydration space 6 by inlet tank 8 at arrival end 52 places in microscler dehydration space 6.In the moving process of net, fibrous suspension dehydration in dehydration space 6, thus produce from the filtrate flows of dehydration space 6 through net 10,12 and porous dehydration part 14,16.In EXPORT CARTON 22,24, collect the filtrate of crossing net from the dehydration spatial flow.
Claims (10)
1. be used for two net squeezers (50) that fibrous suspension is dewatered, comprise: endless lower wire (10) and endless upper wire (12), described endless lower wire (10) and endless upper wire (12) limit microscler dehydration space (6), in the shifting process of described net, fibrous suspension will dewater in described dehydration space (6); Inlet tank (8) is used for fibrous suspension is located to be supplied to described dehydration space at the arrival end (52) in described dehydration space; Bottom porous dehydration part and upper porous dehydration part (14,16), described bottom porous dehydration part and upper porous dehydration part (14,16) are arranged in the outside in described dehydration space against described net; Upper outlet case (24) is used to collect the filtrate of crossing described online and described upper porous dewatering elements from described dehydration spatial flow; Following EXPORT CARTON (22) is used to collect the filtrate of crossing described off line and described bottom porous dewatering elements from described dehydration spatial flow; Upper wire guide (20), described upper wire guide (20) is arranged to described online is tiltedly down guided into the described arrival end in described dehydration space; Lower wire guide (18), described lower wire guide (18) are arranged to described off line described arrival end of guiding described dehydration space obliquely into, thereby form cone space (21) between described upper wire guide and lower wire guide; And extension is from the upper seal and the lower seal (53 of described inlet tank, 54), be used at described net and enter between the suspension in described dehydration space sealing, described thus upper seal and lower seal (53,54) defining the passage (55) that is used for flowing to from described inlet tank (8) described dehydration space (6) each other for fibrous suspension, described seal (53,54) comprise upper wedge seal (53 ＂, 54 ＂) and the lower wedge seal (53 ', 54 '), at described upper wire guide and lower wire guide (18,20) in the described cone space (21) between, described upper wedge seal is arranged to hermetically against described online (12), at described upper wire guide and lower wire guide (18,20) in the described cone space between, described lower wedge seal is arranged to hermetically against described off line (10), each seal (53 thus, 54) have first side (56) and second side (60), described first side (56) defines a described part that is used for the described passage (55) of fibrous suspension, described second side (60) is extended and is arranged to seal at least in part setting against the net that is associated towards described first side (60) with an acute angle, it is characterized in that, described seal (53 ', 54 ', 53 ＂, 54 ＂) be provided with and state online and off line (10 in the described arrival end place in described dehydration space (6), 12) distance between (H1) equates substantially, form the described paper supply mass suspension flows to the passage (55) in described dehydration space (6) from described inlet tank the respective seals (53 that is used for, 54) distance (H2) between first side (56).
2. as claimed in claim 1 pair of net squeezer is characterized in that, respective seals (53 ', 53 ＂, 54 ', 54 ＂) only seals adjoining farmland neighbour and supports respective wire guide (18,20).
3. as claimed in claim 1 pair of net squeezer, it is characterized in that, described first side (56) of respective seals (53 ', 53 ＂) and described second side (60) in both sides (56, the 60) part of meeting, locate to form the taper ligule part (57) that the respective inside neighbour with described net (10,12) supports at the corresponding free end (58) of respective seals (53 ', 53 ＂).
4. each described pair of net squeezer in the claim as described above, it is characterized in that respective seals (53 ', 53 ＂, 54 ', 54 ＂) and the respective wire guide that is associated (18,20) are designed to along the form fit each other at least in part of the adjacent sloping portion that supports part each other.
5. each described pair of net squeezer in the claim as described above is characterized in that, described seal (53 ', 53 ＂, 54 ', 54 ＂) is made by polymer basically.
6. each described pair of net squeezer in the claim as described above, it is characterized in that described seal (53 ', 53 ＂, 54 ', 54 ＂) is along the longitudinal direction (L1) of described pair of net squeezer, be arranged to against described net guide (18,20) along the horizontal direction adjustable ground.
7. each described pair of net squeezer in the claim as described above is characterized in that, described net guide (18,20) is arranged to against described seal (53 ', 53 ＂, 54 ', 54 ＂) along vertical direction (V1) adjustable ground.
8. each described pair of net squeezer in the claim as described above is characterized in that described net guide (18,20) is provided with the wear-out part (64,66) against each net (10,12).
9. each described pair of net squeezer in the claim as described above is characterized in that described net guide (18,20) forms one with described porous dehydration part (14,16).
10. each described pair of net squeezer in the claim as described above is characterized in that described net guide (18,20) comprises the porous dehydration part.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE06021331 | 2006-10-06 | ||
| SE0602133A SE532154C2 (en) | 2006-10-06 | 2006-10-06 | Double wire press comprising sealing elements for dewatering a fiber suspension |
| SE0602133-1 | 2006-10-06 | ||
| PCT/SE2007/000845 WO2008041901A1 (en) | 2006-10-06 | 2007-09-26 | Sealing elements in a twin-wire paper machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101522986A true CN101522986A (en) | 2009-09-02 |
| CN101522986B CN101522986B (en) | 2012-07-04 |
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ID=39268683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800374046A Expired - Fee Related CN101522986B (en) | 2006-10-06 | 2007-09-26 | Sealing elements in a twin-wire paper machine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20100043995A1 (en) |
| EP (1) | EP2092117A4 (en) |
| CN (1) | CN101522986B (en) |
| BR (1) | BRPI0717146A2 (en) |
| CA (1) | CA2664967A1 (en) |
| SE (1) | SE532154C2 (en) |
| WO (1) | WO2008041901A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9333468B2 (en) | 2012-09-24 | 2016-05-10 | Abengoa Bioenergy New Technologies, Llc | Soak vessels and methods for impregnating biomass with liquid |
| AT523438B1 (en) * | 2020-12-21 | 2021-08-15 | Andritz Ag Maschf | SEALING LIP AND METHOD FOR MONITORING THE SEALING LIP |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3846232A (en) * | 1973-03-23 | 1974-11-05 | Valmet Oy | Twin-wire paper forming with wires wrapping around a suction web-forming breast roll and then following a curved path to a suction couch roll |
| US3440136A (en) * | 1965-12-16 | 1969-04-22 | Kimberly Clark Co | Papermaking apparatus including two wire sheet formers having means for air purging |
| US3582467A (en) * | 1968-06-25 | 1971-06-01 | Beloit Corp | Two wire former |
| AT318381B (en) * | 1972-11-17 | 1974-10-10 | Andritz Ag Maschf | Equipment for the head infeed on dewatering machines |
| AT376722B (en) * | 1983-02-09 | 1984-12-27 | Andritz Ag Maschf | DRAINAGE MACHINE FOR CELLULAR OD. DGL. FIBER MATERIAL |
| FI905896A (en) * | 1990-11-29 | 1992-05-30 | Valmet Paper Machinery Inc | FORMNINGSGAPSARRANGEMANG I EN DUBBELVIRAFORMARE AV EN PAPPERSMASKIN. |
| US5160583A (en) * | 1991-12-02 | 1992-11-03 | Beloit Corporation | Controlled jet injection apparatus for a papermaking machine headbox |
| US5254426A (en) * | 1992-04-01 | 1993-10-19 | Eastman Kodak Company | Method of making a projection viewable transparency |
| US5354426A (en) * | 1993-03-29 | 1994-10-11 | Boise Cascade Corporation | Apparatus and method for removing debris from forming wire |
| US5766419A (en) * | 1996-07-23 | 1998-06-16 | Valmet Corporation | Twin-wire gap former in a paper machine |
| US6117271A (en) * | 1998-04-15 | 2000-09-12 | Beloit Technologies, Inc. | Slice lip apparatus |
| DE19919720A1 (en) * | 1999-04-30 | 2000-11-02 | Voith Sulzer Papiertech Patent | Fiber web formation zone has flexible blades at the stock inlet jet to guide the fiber suspension flow without turbulence between the fourdriniers at the support units which apply different pressures in zones |
| EP1543194B1 (en) * | 2002-08-23 | 2017-12-27 | Valmet Technologies, Inc. | Forming of a paper or board web in a twin-wire former |
| US6821392B2 (en) * | 2003-02-20 | 2004-11-23 | Metso Paper, Inc. | Headbox sealing device |
| FI120457B (en) * | 2006-01-27 | 2009-10-30 | Metso Paper Inc | Method and apparatus for forming a paper or cardboard web |
-
2006
- 2006-10-06 SE SE0602133A patent/SE532154C2/en unknown
-
2007
- 2007-09-26 US US12/444,191 patent/US20100043995A1/en not_active Abandoned
- 2007-09-26 CA CA002664967A patent/CA2664967A1/en not_active Abandoned
- 2007-09-26 WO PCT/SE2007/000845 patent/WO2008041901A1/en active Application Filing
- 2007-09-26 BR BRPI0717146-3A patent/BRPI0717146A2/en not_active IP Right Cessation
- 2007-09-26 EP EP07808845A patent/EP2092117A4/en not_active Withdrawn
- 2007-09-26 CN CN2007800374046A patent/CN101522986B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP2092117A4 (en) | 2012-05-30 |
| WO2008041901A1 (en) | 2008-04-10 |
| US20100043995A1 (en) | 2010-02-25 |
| CA2664967A1 (en) | 2008-04-10 |
| SE0602133L (en) | 2008-04-07 |
| BRPI0717146A2 (en) | 2013-11-12 |
| EP2092117A1 (en) | 2009-08-26 |
| SE532154C2 (en) | 2009-11-03 |
| CN101522986B (en) | 2012-07-04 |
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