CN107208374B - The equipment dry for paper and the method for cleaning the equipment - Google Patents
The equipment dry for paper and the method for cleaning the equipment Download PDFInfo
- Publication number
- CN107208374B CN107208374B CN201580074013.6A CN201580074013A CN107208374B CN 107208374 B CN107208374 B CN 107208374B CN 201580074013 A CN201580074013 A CN 201580074013A CN 107208374 B CN107208374 B CN 107208374B
- Authority
- CN
- China
- Prior art keywords
- nozzle passage
- end side
- aperture
- guide plate
- nozzle
- 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.)
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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
-
- 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
- D21F5/18—Drying webs by hot air
- D21F5/181—Drying webs by hot air on Yankee cylinder
Landscapes
- Paper (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention relates to a kind of nozzle passage (1), for gaseous medium to be applied to strip material, especially paper web, board web, thin page width or paper pulp width, the nozzle passage (1) includes the guide plate (4,4a) for having the channel body (2) of multiple nozzles (3) and being arranged in channel body (2) inside, wherein, device is set in nozzle passage (1), can at least some, preferably whole guide plates (4,4a) be removed in a simple manner and be reinstalled from nozzle passage (1) using the device.A kind of drying hood applied in the machine for drying strip material especially raises base cover, wherein the drying hood includes at least one, preferably multiple nozzle passages according to the present invention (1).One kind is for maintaining the method for nozzle passage (1) or drying hood comprising steps of by the aperture (5) of at least one end side removal from channel body (2) by guide plate (4,4a), nozzle passage (1) is maintained by the aperture (5) of at least one end side, guide plate (4,4a) are placed in channel body (2) by the aperture (5) of at least one end side.
Description
The present invention relates to one kind for gaseous medium to be applied to strip material, such as paper web, board web, thin page width or paper
Nozzle passage on pulp web, the nozzle passage include channel body and guide plate, and channel body has multiple nozzles, and guide plate setting is logical
It the inside of road body and is not fixedly connected with channel body, wherein device is set in nozzle passage, it can be near using the device
Few some guide plates are removed and are reinstalled from nozzle passage in a simple manner.The invention further relates to one kind for applying
Drying hood in the machine of dry strip material, a kind of method for maintaining nozzle passage and a kind of for maintaining drying hood
Method.
In the manufacture of a variety of strip materials, especially in the manufacture of paper web, board web, thin page width or paper pulp width, it is necessary to
These material webs are made to undergo at least one drying steps in the fabrication process.Material web is usually directed through steam-heated rolling herein
Cylinder.In some applications, for example in the drying of thin page width, it can be used and so-called raise base drying cylinder.The drying cylinder has
The diameter of 2m or more.In addition, the drying cylinder further includes drying hood, the effect of the drying hood is, by hot gas, especially
Hot-air is applied in material web.Hot gas usually conducts in nozzle passage herein.Nozzle passage is by gas along the width of material web
Distribution.The problem of encountering herein be, will lead to the non-uniform drying of material web and thus material web in gas uneven distribution
Mass defect.
In order to solve the technical problem, in the known in the state of the art of such as US2001/0054239 A1, nozzle passage can
With with built-in fitting, the built-in fitting makes gas distribution uniformity and in turn temperature distribution homogenization.
Furthermore by WO 2006/057696 it is known that built-in fitting can have the form of guide plate.Guide plate is fixed, is for example welded on
In nozzle passage, and it can make air-flow correspondingly along the distribution of lengths of nozzle passage by the moulding of guide plate.
However shown during the long-play of this drying device, it deposited example on the nozzle of nozzle passage
Such as the dirt as caused by fiber.This will lead to the complete or partial blocking of nozzle with the time.Because material web thus can be destroyed again
Dry uniformity, so must periodically nozzle or nozzle passage be cleaned or be maintained.This is to according to WO 2006/
It is difficult to realize for the nozzle passage of 057696 or US, 2001/0054239 A1, is passed through because usually it is almost impossible
Cross the entrance of the input channel of gas, and by built-in fitting and guide plate block from the side of the end side end of nozzle passage into
Enter.
Therefore technical problem to be solved by the present invention lies in provide a kind of drying device, the drying device ensures gas
Distribution and the in turn control of Temperature Distribution on material web width of the body on the width of material web, and be however also able to achieve
The simple maintenance of nozzle passage.
The technical problem passes through a kind of nozzle passage completely and solves, which includes channel body and guide plate, leads to
Road body has multiple nozzles, and guide plate is arranged in the inside of channel body and is not fixedly connected with channel body, wherein in nozzle passage
At least some guide plates can be removed from nozzle passage in a simple manner using the device and be pacified again by middle setting device
Dress.The technical problem also passes through drying hood, the method for maintaining nozzle passage namely the method solution for maintaining drying hood
Certainly.By it is proposed that, channel body on its at least one end side with end side aperture, can be near by the aperture of end side
Few some whole guide plates are removed and are reinstalled from nozzle passage in a simple manner.
It is according to the present invention to be used to gaseous medium being applied to band-like material, especially paper web, board web, thin page width or paper
Nozzle passage on pulp web includes channel body and guide plate, and the channel body has big flow nozzle, and the guide plate is arranged in channel
The inside of body.According to the present invention, device is set in nozzle passage, it can be in a simple manner by least one using the device
A little guide plates, preferably whole guide plates are removed and are reinstalled from nozzle passage.
This is not that is, guide plate is welded with channel body in nozzle passage according to the present invention or otherwise fixed
Ground connection.
Guide plate can be removed from nozzle passage in a simple manner in order to maintain operation in this way, thus
Simplify the maintenance of nozzle passage.After maintaining operation, guide plate can be reinstalled in nozzle passage in a simple manner.
Gaseous medium can be such as hot-air.In a kind of advantageous embodiment, the temperature of gaseous medium can be with
At 100 DEG C or more, especially 200 DEG C or more, advantageously even at 300 DEG C or more.
Usual guide plate is mainly made of metal, especially steel.However within the scope of application, the concept of guide plate should also manage
Solution is the guide plate made of other materials appropriate.It thus can be for example using polymer material, fibre-reinforced plastics or pottery
Porcelain.
Advantageously, the material of guide plate is selected as, even if the material is in the case where the gaseous medium durable contact with heat
Also it is able to maintain stabilization.
Such as it can be stated that guide plate is shape-ordinatedly reversibly connect with channel body in a simple manner.A kind of special
In advantageous embodiment, guide plate is connected by clamping connector with channel body.
In a kind of advantageous embodiment of nozzle passage, channel body is on its at least one end side, preferably at two
Aperture is respectively provided on end side, it can be by least some, preferably whole guide plates in a simple manner from nozzle by the aperture
It removes and reinstalls in channel.
Additionally it can be stated that closing cap is respectively set at least one end side, preferably on two end sides.The closing
Closing of the lid for the aperture of end side.The gas in the operational process of nozzle passage is thus avoided to escape from the aperture of end side,
However then still guide plate can be taken out and be reinstalled by the aperture of end side for maintenance.
In a kind of particularly preferred embodiment of the invention, the device for simply removing guide plate includes at least one
Common carrier element.At least one guide plate, preferably multiple guide plates, particularly preferably whole guide plates utilize the common carrier member
Part is connected.
According to the difference of embodiment, guide plate can rigidly or movably be connected with the common carrier element.
Common carrier element can be such as rod piece, pipe fitting or lath, and carrier element common in other words may include
One or more components namely rod piece, pipe fitting or lath.
And common carrier element does not weld fixedly usually with channel body.
Common carrier element is advantageously designed to herein, carrier element can be easy to be accessible by the aperture of end side or
Person, which says, to be caught.It, can be first with carrier by all in a simple manner by pulling out common carrier element through the aperture of end side
The connected guide plate of part is removed from nozzle passage by simple mode.In the same way, guide plate can be in maintenance operation
It is reinstalled later into nozzle passage.
It is frequently advantageous that, whole guide plates is fixed on common carrier element in order to simplify operation.This carrier member
Part substantially extends in the whole length of nozzle passage.However multiple common carrier elements also can be set.Therefore a
It will be advantageous that in other situation, two common carrier elements be set, wherein each carrier element is substantially in nozzle passage
Extend in half length.Therefore, one common carrier element can be gone by the aperture of an end side to carry out maintenance
It removes, and another common carrier element is removed by the aperture of another end side.
In other advantageous embodiments, a part of guide plate, preferably whole guide plates are embodied as baffle.Pass through the baffle
Along its length by nozzle passage, namely along material web width, be divided into multiple individual sections.
Furthermore the invention further relates to one kind for applying for drying band-like material web, especially paper web, board web, thin page width
Or the drying hood in the machine of paper pulp width.Such as be herein Yang Ji cover, such as it applies in the manufacture of tissue paper.According to this hair
Bright drying hood is characterized in that, drying hood includes at least one, preferably multiple nozzle passages according to the present invention.
It can be stated that drying hood includes that primary input is logical in a kind of advantageous embodiment of drying hood according to the present invention
Road and at least one, preferably two or multiple assignment channels.Hot gas is imported in drying hood herein by primary input channel,
And hot air distribution is given to different nozzle passages by one or more assignment channels.
In a kind of particularly preferred embodiment, at least one assignment channel is embodied as curved shape.
Furthermore the invention further relates to the methods for maintaining nozzle passage according to the present invention described in one kind.The method exists
This following steps are included:
A) guide plate is removed from the body of channel by the aperture of at least one end side,
B) nozzle passage is maintained by the aperture of at least one end side,
C) guide plate is placed in the body of channel by the aperture of at least one end side.
Nozzle passage can be maintained under loading state by according to the method for the present invention.Nozzle passage need not thus from
It is fitted into occasion, for example removes from drying hood.
When closing cap is arranged at nozzle passage, closing cap will be usually removed to before process a) makes at least one
The degree of the aperture exposure of a end side, so as to be removed guide plate by the aperture.
When a common carrier element is arranged, which is advantageously arranged to herein, which can
It is easily accessible by the aperture of end side and is caught in other words.It for example can be by first by common carrier in process a)
Part by the aperture of end side pull out and in a simple manner by the guide plate being all connected with common carrier element from nozzle passage
Middle removal.Guide plate can equally be reinstalled by this way into nozzle passage after maintaining operation in step c).
In a kind of advantageous embodiment of the method, the maintenance operation in step b) may include logical to nozzle
The cleaning of some or all nozzles in road is made of the cleaning of some or all nozzles of nozzle passage.
Finally, the invention further relates to a kind of methods for maintaining the drying hood.For maintaining the method packet of drying hood
The maintenance at least one nozzle passage is included, the maintenance is completed by the method.
Below by the attached drawing being schematically not drawn to scale, the present invention is further explained.
Fig. 1 a schematically shows the sectional side elevation across baffled nozzle passage according to prior art；
Fig. 1 b schematically shows the sectional side elevation across the nozzle passage for having guide plate according to prior art；
Fig. 2 a schematically shows the sectional side elevation across baffled nozzle passage according to the present invention；
Fig. 2 b schematically shows the sectional side elevation across the nozzle passage according to the present invention with guide plate, the guide plate its
In one be embodied as baffle；
Fig. 3 shows the cross sectional view across nozzle passage according to the present invention；
Fig. 4 shows the sectional view across drying hood.
The cross-sectional view along the length L of nozzle passage according to prior art is shown respectively in Fig. 1 a and Fig. 1 b.Nozzle is logical
Road 1 respectively include two for be originated from assignment channel 9 hot gas intake line 9.The gas passes through nozzle 3 from nozzle
Channel 1 is discharged, and is applied in material web.Guide plate 4,4a are embodied as baffle 4a in the nozzle passage 1 shown in Fig. 1 a.Baffle 4a
Fixedly it is connected with channel body 2.Usual baffle 4a and channel body 2 weld.Fig. 1 b shows nozzle passage 1, in the nozzle passage
In baffle is fixedly welded on the body of channel at center.In addition, nozzle passage 1 is additionally provided with other guide plates 4, the guide plate will
The fluid for entering nozzle passage 1 from intake line 9 is distributed along the length L of nozzle passage 1.And the guide plate 4 also with channel body 2
Fixedly it is connected.
It is only capable of passing through input pipe the maintenance of nozzle passage 1, the cleaning of especially nozzle 3 are shown in Fig. 1 a and Fig. 1 b
The entrance on road 9 is realized, and is additionally hindered by guide plate 4,4a.
Nozzle passage 1 according to the present invention is shown respectively in Fig. 2 a and Fig. 2 b.And it is the importing of gaseous medium herein, preferably hot
The intake line of air being directed through from assignment channel 9 is realized.By nozzle 3 by gas from nozzle passage 1 be discharged and
It is applied on material web, such as thin page width, paper pulp width or similar material width.Nozzle passage 1 shown in Fig. 2 a, which includes such as four, leads
Plate 4,4a, four guide plates are all embodied as baffle 4a.Nozzle passage 1 is divided into multiple sections 8 by baffle 4a.According to applied field
The difference of conjunction especially additionally depends on the length L of nozzle passage 1 and the quantity of assignment channel 9, also can be set more or it is less
A guide plate.Baffle 4a is not connected fixedly in fig. 2 a with channel body 2.Guide plate is not especially welded or is threadedly coupled with channel body 2.
Unlike this it can be stated that baffle 4a shape-ordinatedly or with small gap is pushed into nozzle passage 1.Baffle 4a is all solid
It is scheduled on a common carrier element 7.Carrier element 7 includes pipe fitting, especially steel pipe in fig. 2 a, and the pipe fitting is generally in
The approximate centre of nozzle passage.However it is also feasible that common carrier element 7 includes rod piece or lath, or by rod piece or plate
Item is constituted.Common carrier element 7 extends on the whole length L of nozzle passage 1 in the embodiment shown in Fig. 2 a.However root
Can be also with regulation according to the present invention, carrier element only extends in a part of length L.Such as it is also contemplated that setting two
A common carrier 7, described two common carriers extend in the half of length L respectively.
Nozzle passage 1 shown in Fig. 2 b includes such as five guide plates 4,4a, and one of guide plate is embodied as baffle 4a, and
And other guide plates are embodied as baffle 4.Common carrier element 7 for example only prolongs in a part of the length L of nozzle passage 1 herein
It stretches, however can also extend on whole length L in other embodiments, using the common carrier element by baffle 4a
It is connected with remaining guide plate.Common carrier element 7 is placed in figure 2b except the center of nozzle passage 1.According to the present invention also
It can be stated that the component of common carrier element 7 carrier element in other words is arranged on the wall of channel body 2 or near wall.
The nozzle passage 1 of a and 2b has the aperture 5 of end side on two end sides according to fig. 2, and the aperture is closed respectively
Lid 6 is closed.It may further specify that in other advantageous embodiments, nozzle passage 1 only has opening for end side on an end side
Hole 5.It can make the exposure of aperture 5 of end side by opening closing cap 6.Therefore, for the maintenance of nozzle passage 1, especially nozzle 3
Cleaning, can be removed guide plate 4,4a by the aperture 5 of end side from nozzle passage 1.Meet purpose, common load herein
Body 7 is set as, and the common carrier can be grasped by the aperture 5 of end side.Therefore there are a possibility that be, it is common
Carrier 7 is pulled out or is removed from nozzle passage 1 together with fixed guide plate 4,4a on the carrier.
Guide plate 4,4a or especially baffle 4a can be rigidly attached according to the present invention with common carrier element 7.However make
Alternatively to may further specify that, plate 4,4a are movably connected with carrier element.It is therefore advantageous that plate 4,4a are equipped with valve machine
Structure is more easily removed or is installed to realize in nozzle passage.
Fig. 3 is shown across the cross section of nozzle passage 1 according to the present invention.Baffle 4a is generally in the entire of channel body 2
Extend and therefore divide the entire cross section of channel body 2 on cross section.Common carrier element for example is set by rod piece herein
7, the rod piece is placed in the center of channel body 2.In this embodiment using the common carrier element 7 by guide plate rigidly
It is fixed.
The possible embodiment for across drying hood according to the present invention, especially raising base cover is schematically shown in Fig. 4
Sectional view.Drying hood further includes two assignment channels other than primary input pipeline 10, and the assignment channel is embodied as deviously
The shape of so-called " crescent moon head ".Gas medium is distributed to multiple individual nozzle passages 1 by assignment channel 9.Herein at least one
Nozzle passage 1, preferably all nozzle passages 1 are embodied as nozzle passage 1 according to the present invention.
Claims (23)
1. a kind of nozzle passage (1), for gaseous medium to be applied to strip material, the nozzle passage (1) includes channel
Body (2) and guide plate (4,4a), the channel body (2) have multiple nozzles (3), and the guide plate is arranged in the interior of channel body (2)
It portion and is not fixedly connected with channel body (2), wherein device is set in nozzle passage (1), it can be near using the device
Few some guide plates (4,4a) remove in a simple manner and are reinstalled from nozzle passage (1), which is characterized in that channel body
(2) it can be led at least some with the aperture (5) of end side by the aperture (5) of the end side on its at least one end side
Plate (4,4a) is removed in a simple manner and is reinstalled from nozzle passage (1).
2. nozzle passage (1) according to claim 1, which is characterized in that closing is respectively set at least one end side
It covers (6), the closing cap (6) is used to close the aperture (5) of corresponding end side.
3. nozzle passage (1) according to claim 2, which is characterized in that at least one described closing cap (6) is to make end side
Aperture (5) exposure can be removed or open.
4. according to claim 1 to nozzle passage described in one of 3 (1), which is characterized in that for simply remove guide plate (4,
Device 4a) includes at least one common carrier element (7), and at least one guide plate (4,4a) and common carrier element
(7) it is connected.
5. nozzle passage (1) according to claim 4, which is characterized in that at least part guide plate (4,4a) and common
Carrier element (7) rigidly or is movably connected.
6. nozzle passage (1) according to claim 4, which is characterized in that common carrier element (7) includes rod piece, pipe
Part or lath, or be made of rod piece, pipe fitting or lath.
7. nozzle passage (1) according to claim 1 or 2, which is characterized in that at least part guide plate (4,4a) is embodied as
Nozzle passage (1) is divided into multiple sections (8) by the baffle by baffle (4a).
8. nozzle passage (1) according to claim 1, which is characterized in that the strip material is paper web, board web, thin
Page width or paper pulp width.
9. nozzle passage (1) according to claim 1, which is characterized in that using the device can by whole guide plates (4,
4a) the removal from nozzle passage (1) in a simple manner, wherein can be by whole guide plates by the aperture (5) of the end side
(4,4a) removal from nozzle passage (1) in a simple manner.
10. nozzle passage (1) according to claim 1, which is characterized in that closing cap is respectively set on two end sides
(6), the closing cap (6) is used to close the aperture (5) of corresponding end side.
11. nozzle passage (1) according to claim 10, which is characterized in that two closing caps (6) are the aperture for making end side
(5) exposure can be removed or open.
12. nozzle passage (1) according to claim 4, which is characterized in that multiple guide plates (4,4a) and common carrier member
Part (7) is connected.
13. nozzle passage (1) according to claim 4, which is characterized in that whole guide plates (4,4a) and common carrier member
Part (7) is connected.
14. nozzle passage (1) according to claim 4, which is characterized in that whole guide plates (4,4a) and common carrier member
Part (7) rigidly or is movably connected.
15. nozzle passage (1) according to claim 1 or 2, which is characterized in that whole guide plates (4,4a) are embodied as baffle
Nozzle passage (1) is divided into multiple sections (8) by the baffle by (4a).
16. a kind of drying hood applied in the machine for drying strip material, which is characterized in that the drying hood includes extremely
Few one according to claim 1 to nozzle passage described in any one of 15 (1).
17. drying hood according to claim 16, which is characterized in that drying hood includes primary input channel (10) and at least
One assignment channel (9).
18. drying hood according to claim 17, which is characterized in that at least one assignment channel (9) has curved shape
Shape.
19. drying hood according to claim 16, which is characterized in that the drying hood is Yang Ji cover, wherein the drying
Cover includes multiple nozzle passages (1).
20. drying hood according to claim 16, which is characterized in that drying hood includes primary input channel (10) and two
Or more assignment channel (9).
21. a kind of for maintaining according to claim 1 to the method for nozzle passage described in any one of 15 (1), feature exists
In, the method includes the steps:
A) guide plate (4,4a) is removed from channel body (2) by the aperture (5) of at least one end side,
B) nozzle passage (1) is maintained by the aperture (5) of at least one end side,
C) guide plate (4,4a) are placed in channel body (2) by the aperture (5) of at least one end side.
22. according to the method for claim 21, which is characterized in that the maintenance of nozzle passage (1) includes to some or all
The cleaning of nozzle (3) is made of the cleaning to some or all nozzles (3).
23. a kind of method for maintaining drying hood, which is characterized in that the drying hood is real according to one of claim 16 to 20
Apply, and include the maintenance at least one nozzle passage for the method for maintaining drying hood, to the maintenance of nozzle passage according to
Method described in claim 21 or 22 is completed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014225970.3 | 2014-12-16 | ||
| DE102014225970 | 2014-12-16 | ||
| PCT/EP2015/074345 WO2016096202A1 (en) | 2014-12-16 | 2015-10-21 | Device for paper drying and method for cleaning it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107208374A CN107208374A (en) | 2017-09-26 |
| CN107208374B true CN107208374B (en) | 2019-09-03 |
Family
ID=54337763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580074013.6A Active CN107208374B (en) | 2014-12-16 | 2015-10-21 | The equipment dry for paper and the method for cleaning the equipment |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3234258A1 (en) |
| CN (1) | CN107208374B (en) |
| WO (1) | WO2016096202A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3012335A (en) * | 1957-11-16 | 1961-12-12 | Svenska Flaektfabriken Ab | Treating web-like material by a gaseous medium |
| US5070627A (en) * | 1990-01-16 | 1991-12-10 | W. R. Grace & Co.-Conn. | Directional diffusion nozzle air bar |
| CA2300839A1 (en) * | 2000-03-17 | 2001-09-17 | Asea Brown Boveri Inc. | Thermal equalizer |
| CN203807883U (en) * | 2014-04-28 | 2014-09-03 | 彭锦铜 | Bore type partitioned air regulation air cover |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7448147B2 (en) | 2004-11-22 | 2008-11-11 | Metso Paper Usa, Inc. | Nozzle insert for a Yankee impingement hood |
-
2015
- 2015-10-21 WO PCT/EP2015/074345 patent/WO2016096202A1/en active Application Filing
- 2015-10-21 EP EP15784031.5A patent/EP3234258A1/en not_active Withdrawn
- 2015-10-21 CN CN201580074013.6A patent/CN107208374B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3012335A (en) * | 1957-11-16 | 1961-12-12 | Svenska Flaektfabriken Ab | Treating web-like material by a gaseous medium |
| US5070627A (en) * | 1990-01-16 | 1991-12-10 | W. R. Grace & Co.-Conn. | Directional diffusion nozzle air bar |
| CA2300839A1 (en) * | 2000-03-17 | 2001-09-17 | Asea Brown Boveri Inc. | Thermal equalizer |
| CN203807883U (en) * | 2014-04-28 | 2014-09-03 | 彭锦铜 | Bore type partitioned air regulation air cover |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016096202A1 (en) | 2016-06-23 |
| CN107208374A (en) | 2017-09-26 |
| EP3234258A1 (en) | 2017-10-25 |
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