EP4352298A1 - Haubentor einer trockenhaube - Google Patents
Haubentor einer trockenhaubeInfo
- Publication number
- EP4352298A1 EP4352298A1 EP22722704.8A EP22722704A EP4352298A1 EP 4352298 A1 EP4352298 A1 EP 4352298A1 EP 22722704 A EP22722704 A EP 22722704A EP 4352298 A1 EP4352298 A1 EP 4352298A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hood
- door
- segments
- drying
- hood door
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000001035 drying Methods 0.000 claims description 74
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 5
- 239000011496 polyurethane foam Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 239000000123 paper Substances 0.000 description 33
- 230000000694 effects Effects 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229920000582 polyisocyanurate Polymers 0.000 description 2
- 239000011495 polyisocyanurate Substances 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- -1 tissue Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/04—Drying on cylinders on two or more drying cylinders
- D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
- D21F5/044—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using air hoods over the cylinders
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
- E06B3/48—Wings connected at their edges, e.g. foldable wings
- E06B3/485—Sectional doors
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
- E06B3/48—Wings connected at their edges, e.g. foldable wings
- E06B3/485—Sectional doors
- E06B3/486—Sectional doors with hinges being at least partially integral part of the section panels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/08—Parts thereof
- F26B25/12—Walls or sides; Doors
Definitions
- the invention relates to a hood door for an insulated drying hood for a paper machine, the hood door comprising at least two thermally insulated hood door segments.
- the invention further relates to a method for controlling a hood gate of an insulated drying hood according to one of the claims of the invention.
- hood doors are known from the prior art, for example from DE202007016891U1, but due to the large hood door segments, the hood cannot be opened wide enough in the prior art to carry out more complex maintenance work.
- parts of the drying hood often have to be dismantled, or additional windows and maintenance doors have to be provided in the drying hood.
- Faster, unimpeded access in the event of a fault is also often not achieved with the current state of the art.
- the object of the invention is to improve the disadvantages described.
- the aim of the invention is to improve accessibility, in particular for maintenance and cleaning work. The effort for maintenance work should be reduced and the operational safety should be increased.
- the object is achieved for the hood door by an embodiment corresponding to independent claim 1 .
- Further advantageous embodiments of the present invention can be found in the dependent claims.
- the hood door segments have a width of 7 m to 15 m and a height of 0.75 m to 1.5 m, the hood door segments being constructed rigidly and separately, the hood door segments being movable when the hood door is closed and are releasably connected to one another and wherein the hood door segments are arranged separately in the upper region of the drying hood when the hood door is in the open state.
- the width of the hood gate segments refers to the direction along the running direction of the paper machine, also called MD for "machine direction" in technical jargon.
- a paper machine within the meaning of this invention is a machine for producing a paper, tissue, cardboard or fibrous web. During the production of this paper web, the wood or recycling fiber material is first mechanically dewatered and/or pressed. In a further process step, the moist paper, tissue, cardboard or fibrous web is then thermally dried in a drying hood.
- hood door segments are particularly advantageous.
- a height of 100 cm to 120 cm, for example, allows a passage for people to be opened by opening two segments.
- the width of the hood door segments is limited by the stability of the segments. Thanks to a sandwich construction with a PU foam core and two metal sheets on the surface, widths of more than 7 m can be achieved, which can still be moved without problems using a guide arranged on the edge.
- a hood door segment width of 8 m to 12 m has proven advantageous in practice, since an emergency exit can be positioned after two hood door segments.
- standardized hood door segments of this size have an economic advantage over conventional hall doors.
- the drying hood has the task of minimizing thermal losses and maintaining the optimum temperature for drying. Temperatures of 40°C - 70°C are usually maintained in the drying hood, since this is the most economical way to exchange air. If the temperature on parts of the drying hood is too low, or the insulating effect is too weak, condensation can occur there. The condensed water can in turn damage the paper web or the paper machine. Good and complete insulation is therefore advantageous, particularly on the hood door. It is therefore advantageous if the hood door and/or the hood door segments are guided laterally between and by means of two guide devices. The hood door segments are held on at least one side and can be positioned in such a way that no thermal bridges or other defects in the insulating effect occur.
- hood door where the hood door segments have at least one sealing means that seals the transition from the hood door segment to an adjacent hood door segment, to a hall floor of the paper machine and/or to a guide device.
- a sealant has the task of minimizing thermal losses in the drying hood by reducing the gas exchange from the hood.
- Sealing means can include, for example, brushes, seals, or sealing strips. Seals can also be made of sealing lips made of rubber. Seals made of ethylene-propylene-diene rubber (EPDM) are particularly advantageous as they can withstand elevated temperatures of 50° - 90° C and have good chemical resistance to cleaning agents and environmental influences.
- EPDM ethylene-propylene-diene rubber
- bonnet door wherein the bonnet door segments have a holding device along at least one edge, with which the bonnet door segments can be detachably coupled to one another, in particular by hooking.
- hood door segments In order to move the hood door segments evenly, it is advantageous if they are coupled into one another. This can be solved by a hook or releasable hook mechanism on two segments arranged one above the other.
- a corresponding design of the hood door segment edge along the width of the hood door segment can also enable hooking into one another. Some examples of this can also be found in the figures.
- a corresponding tongue and groove design with a catch can also contribute to the seal when the hood door is closed.
- hood door wherein the hood door segments are separated when the hood door is opened and are arranged within the dryer hood in the upper area of the dryer hood, the hood door segments being moved by at least one drive device and comprising devices for guiding and/or coupling the hood door segments, with the drive device preferably are also arranged within the drying hood
- a compact arrangement of the hood door segments in the upper part of the dryer hood enables extensive access to all parts of the paper machine located in the dryer hood. Good accessibility is particularly advantageous for maintenance work and for replacing individual rolls or clothing on the paper machine. In the prior art, parts of the hood door are often in the way, or the large hood door segments make good accessibility difficult.
- hood door segments For a compact arrangement of the hood door segments in the upper part of the dryer hood, it can be advantageous to provide further holding devices or holding mechanisms such as a guide and/or coupling device. In this way, the isolated hood door segments can be held in a parking position when the hood door is open. When the hood door is closed, the hood door segments can be fed back to the hood door by these devices for guiding and/or coupling.
- An arrangement of the drive device inside the drying hood offers several advantages, firstly the drive device can be positioned in such a way that it is easily accessible for maintenance work. Accessibility can also be achieved via existing catwalks inside the drying hood. If the drive device is positioned on the roof of the drying hood, as is known in the prior art, access is only possible via the roof of the drying hood, or via a crane or a lifting platform. Another benefit of a Positioning inside the drying hood is the physical proximity to the paper machine, which facilitates simplified cable routing and integration into the machine control.
- a bonnet door where the outer shell of the bonnet door segments is made of a metallic material and is filled inside with an insulating material, the insulation having a material thickness of 30 mm to 100 mm, in particular with an insulating panel made of rigid polyurethane foam.
- the hood door segment is constructed from an insulating panel, in particular from rigid polyurethane foam (PU), which is encased on the surface with a metal sheet, in particular made of steel or stainless steel.
- PU rigid polyurethane foam
- hood door segments can be constructed with a low material thickness. Even hood door segments with a PU core with a material thickness of 40 mm to 80 mm had an adequate insulating effect in tests.
- a structure with other insulating materials is also possible, for example mineral wool, polyisocyanurate rigid foam (PIR), textile mats or vacuum elements can be integrated into the hood door segments. The mechanical stability is then ensured by the metal outer shell or by integrated reinforcement elements.
- drying hood for a paper machine, wherein the drying hood comprises at least two hood doors according to one of the claims, wherein at least one common guide device is arranged between the hood doors and each hood door is guided laterally by a guide device.
- the drying hood of a paper machine can be very wide, and in some cases extends more than 80 m in the running direction of the machine. It may therefore be necessary to arrange a plurality of hood doors along the drying hood. It can be advantageous if two adjacent gates can share the same guide element, since such a particularly wide one
- a drying hood is also advantageous, with at least two hood doors being arranged along the drying hood, with the guide device comprising an emergency exit at least after two hood doors arranged next to one another.
- Guide device is arranged with an emergency exit. Due to its larger design, this guide element with emergency exit can also be well suited to include a support function for the hood gates and/or drive device. Also advantageous is a dryer hood, wherein the guide devices, which do not include an emergency exit and are arranged between two adjacent hood doors, can be moved at least partially or in segments when the hood doors are opened such that the guide devices at least partially open the opening between the hood doors.
- the advantage here is that accessibility can be made completely accessible over the width of two hood door segments.
- a partial opening of at least 2 m to 2.2 m is advantageous in order to allow operating personnel access across the width of the two hood door segments.
- Such accessibility is particularly advantageous for cleaning work after paper web breaks or other disruptions.
- regular support elements between hood doors are often imminent during cleaning work way and can even lead to collision accidents.
- the guide elements can be partially folded away, generous accessibility is made possible.
- a drying hood wherein the hood door segments can be moved completely into the upper area of the drying hood, wherein the opening height of the hood door releases a substantial part of the height of the paper machine and comprises at least 80% of the height of the drying hood.
- a large opening in the hood door of the drying hood enables maintenance work such as replacing rollers or clothing on the paper machine located in the drying hood.
- the large opening height of the hood door and the fact that the hood door is compactly stowed away at the same time are advantageous, as there are no parts of the hood door in the way.
- the hood door does not exceed the height of the drying hood, which enables it to be positioned in a comparatively low production hall.
- the object is achieved according to the invention by a method for controlling a hood door of an insulated drying hood according to one of the preceding claims, wherein the hood door is opened two hood door segments wide in the event of a fault in the paper machine or the drying hood and the opening height of the hood door is at least 2.1 m , preferably at least 2.2 m.
- an opening of a maximum of 2.5 m makes sense to ensure quick opening.
- the drying hood is automatically opened wide enough that machine operators can reach the paper machine quickly and without barriers.
- an optical sensor at the end of the drying hood can determine whether paper is leaving the drying hood.
- FIG.2 A partial sectional view of a drying hood with a fluff gate
- FIG.3 Two further versions of a drying hood with a fluff gate
- FIG. 1 shows a schematic view, not to scale, of a dryer hood 2 with three fluff doors 1 according to one aspect of this invention.
- the view is shown along the machine direction MD.
- the fluff gate 1 on the left-hand side of FIG. 1 is in an open state 5. This enables good access to the part of the paper machine 11 that is in the fluff.
- the Flaubentorsegmente 3 are arranged in the upper area of the drying hood 2, which is indicated by a broken line.
- the open state of the Flaubentor for example, dryer fabrics, guide rollers or
- Drying cylinders are exchanged from the paper machine 9 without the drying hood 2 having to be dismantled. Further openings in the roof of the drying hood 2 also allow accessibility by means of an indoor crane.
- the hood door 1 shown in the middle is in a partially open state 6 . Since the opening of the hood door 1 is already approx.
- a guide device 7, as shown between the left and middle hood door 1 can be partially moved away or raised so that the
- the hood door segments 3 can also have sealing means 8 with which gaps between the hood door segments 3, the hall floor of the paper machine 9 or the guide devices are sealed. In this way, the drying hood can achieve a good insulating effect, particularly when the hat gate 4 is in the closed state, which in turn enables efficient drying performance of the drying hood 2 .
- the marking AA in FIG. 1 shows the partial sectional plane on which the following figures with various features are based.
- FIG. 2 shows a schematic partial sectional representation A-A, not to scale, of a drying hood 2 with a hood door 1 according to a further aspect of the invention.
- FIG. 2 shows a schematic partial sectional representation A-A, not to scale, of a drying hood 2 with a hood door 1 according to a further aspect of the invention.
- FIG. 2 shows a schematic partial sectional representation A-A, not to scale, of a drying hood 2 with a hood door 1 according to a further aspect of the invention.
- FIG. 2 shows a schematic partial sectional representation A-A, not to scale, of a drying hood 2 with a hood door 1 according to a further aspect of the invention.
- FIG. 2 shows a schematic partial sectional representation A-A, not to scale, of a drying hood 2 with a hood door 1 according to a further aspect of the invention.
- FIG. 2 shows a schematic partial sectional representation A-A, not to scale, of a drying hood 2 with a
- hood gate segments 3 Includes hood gate segments 3 and is shown in a partially open state.
- One of the hood door segments 3 is already decoupled from the hood door 1 and arranged in the upper part of the dryer hood 2 .
- the drive device 100 is located in the lower area, comprising a drive motor 101 and a gear 102, which are arranged on the hall floor of the paper machine 9 in this illustration.
- the drive device also includes a chain or cable drive 103 which is connected to two hood door segments via a guide and/or coupling device.
- the device for guiding and/or coupling 12 the hood door segments also includes a safety catch 105, which prevents the hood door 1 from closing unintentionally in the event of a fault in the drive device 100, drying hood 2 or hood door 1.
- the three detail sections B show various aspects of the holding device 10, which can detachably connect the hood gate segments.
- the hood door segments 3 can be guided in different directions in order to be disengaged. Sealing means 8 between the hood door segments 3 can also be advantageous in order to achieve a good insulating effect. In the illustration below, the hood door segments can also support this sealing effect with their own weight.
- the maximum opening height 14 of the hood door 1 is shown in comparison to the height of the drying hood C.
- FIG. 3 shows two schematic partial sectional illustrations AA, which are not to scale, of a drying hood 2 with a hood door 1 according to a further aspect of the invention.
- the partial sectional views AA are shown in the cross-machine direction CD.
- the partial sectional view AA on the left side shows a hood door 1 with three hood door segments 3, one of which is already uncoupled and is arranged on a device for guiding and coupling 12.
- the hood gate segments 3 also have a fall arrest device 105, which can keep the gate moveable in one position in the event of a fault.
- the fall arrest device 105 can, for example, keep the hood door segments movable in one position if the drive motor 101 fails or the chain or cable drive 103 breaks.
- the maximum opening height of the hood gate 14 is shown in both partial sectional representations AA in relation to the height of the drying hood C and is particularly important in order to ensure accessibility to the paper machine 11 (not shown).
- the drive device 100 with the drive motor 101 is arranged inside the drying hood 2 .
- the drive motor 101 also includes a
- Cooling air duct 104 with which cool air can be sucked in from outside the drying hood, with a typical temperature of 20°-40° C., and the waste heat from the drive motor can then be blown into the drying hood.
- Partial sectional view A-A on the right side of Figure 3 shows a
- Hood gate segment 3 in the open state of the hood gate 5 another optional hood gate segment 3 is not shown.
- the partial sectional view A-A on the right side of Figure 3 two alternative embodiments of the drive device 100 comprising at least the gear 102 and the
- the drive motor 101 shown.
- the drive motor 101 can be attached above the hood door 1 or even directly on the hood door 1 .
- An anchoring of the chain or cable drive 103 or the drive device 100 within the drying hood 2 is necessary here in order to open the hood door 1 in such a way that the maximum opening height of the hood door 14 can be released completely.
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Paper (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021115075.2A DE102021115075B4 (de) | 2021-06-11 | 2021-06-11 | Haubentor einer Trockenhaube |
| PCT/EP2022/059696 WO2022258243A1 (de) | 2021-06-11 | 2022-04-12 | Haubentor einer trockenhaube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4352298A1 true EP4352298A1 (de) | 2024-04-17 |
Family
ID=81603509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22722704.8A Withdrawn EP4352298A1 (de) | 2021-06-11 | 2022-04-12 | Haubentor einer trockenhaube |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4352298A1 (de) |
| DE (1) | DE102021115075B4 (de) |
| WO (1) | WO2022258243A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2825430A (en) * | 1953-07-13 | 1958-03-04 | Ross Engineering Of Canada Ltd | Paper machine hood |
| DE29714615U1 (de) * | 1997-08-14 | 1997-11-27 | Schieffer Tor- und Schutzsysteme GmbH, 59557 Lippstadt | Tür- oder Torverschluß |
| DE202007016891U1 (de) | 2007-12-03 | 2008-02-14 | Langbein & Engelbracht Gmbh | Trockenhaube |
| FI11691U1 (fi) | 2017-05-05 | 2017-06-09 | Valmet Technologies Oy | Nostoseinäelementti kuiturainakoneen sylinterikuivatusosan huuvaa varten ja kuiturainakoneen sylinterikuivatusosan huuva |
-
2021
- 2021-06-11 DE DE102021115075.2A patent/DE102021115075B4/de active Active
-
2022
- 2022-04-12 WO PCT/EP2022/059696 patent/WO2022258243A1/de not_active Ceased
- 2022-04-12 EP EP22722704.8A patent/EP4352298A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021115075A1 (de) | 2022-12-15 |
| DE102021115075B4 (de) | 2024-02-15 |
| WO2022258243A1 (de) | 2022-12-15 |
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