• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method of producing a heat exchanger, and a heat exchanger, particularly temperature influencing roller (1) of double-casing type, with a core tube (2) and an outer tube (3), between which a temperature influencing medium can be conducted, and at the ends of the tubes with distributor covers carried by pins, are to be developed in such a way that notwithstanding optimum heat delivery a specific degree of stiffness, which otherwise merely calendering rollers have, is also ensured. For that purpose it is proposed that temperature influencing medium guide shells (5) are positioned between the core tube (2) and the outer tube (3) at the inner wall (4) of the outer tube (3), that a casting mass (6) is introduced between the core tube (2) and the temperature influencing medium guide shells (5), that after hardening of the casting mass (6) bearing points are mounted at the sandwich tubes thus created, that subsequently the sandwich tube is balanced by selective introduction of weights and that subsequently the distributor covers and pins are mounted.
    公开号:FI20186004A1
    申请号:FI20186004
    申请日:2018-11-27
    公开日:2019-05-31
    发明作者:Ludwig Hellenthal
    申请人:Walzen Irle Gmbh；
    IPC主号:
    专利说明:

    METHOD OF PRODUCING A HEAT EXCHANGER, AND A HEAT EXCHANGER
    The invention relates to a method of producing a heat 5 exchanger and to a heat exchanger, particularly temperature influencing roller of double-casing type, with a core tube and an outer tube, between which a temperature influencing medium can be conducted, and at the ends of the tubes with distributor covers carried by 10 pins.
    Rollers for heating or cooling in rolling processes are long-known. In that case, distinction is made between calendering rollers on the one hand, which have to be 15 stiff in bending and wear resistant, and temperature influencing rollers, which are designed for a maximum temperature influencing performance with smallest possible temperature error at the roller surface. The bending forces, which are to be transmitted, of 20 temperature influencing rollers are significantly lower than those of a calendering roller. Temperature influencing rollers thus do not need to be particularly stiff in bending and accordingly can be of lighter construction. The wear resistance of temperature 25 influencing rollers - if even required - is ensured by a coating.
    However, the transition between the features of a calendering roller and the features of temperature 30 influencing rollers is fluid, i.e. temperature influencing rollers designed to be comparatively stiff in bending, but also heavy, can certainly also be produced.
    20186004 prh 27-11- 2018
    Due to the only small bending stiffness required, use is of course made of double-casing rollers as temperature influencing rollers, which can be produced substantially more favourably just by the less material by comparison not only with peripherally drilled solid rollers, but also with peripherally drilled hollow rollers.
    It is important for temperature influencing rollers that the temperature source lies very close to the temperature 10 sink and is arranged as concentrically as possible with respect thereto. The inner heat transfer area should be as large as possible. The optimum would be the same as the outer, i.e. the roller surface.
    However, a heat transfer which is as effective as possible is desirable even in the case of calendering rollers .
    A temperature influencing roller has already become 20 known through DE 103 53 288 B4, which for improvement of the temperature profile of the roller surface has, in at least one channel, wall coatings and/or surface treatments so that the channel is divided into at least two segments.
    WO 98/12440 discloses a composite tube consisting of an outer tube and an inner tube, between which is formed a gap in which at least one element is to adhere to the inner surface of the outer tube and the outer surface of 30 the inner tube. This composite roller might have a certain degree of stiffness, but optimal heat output is not guaranteed.
    A heating or cooling cylinder with a double casing and forced circulation of the heating or cooling medium has become known through DE 25 04 471 Al, in which the inner casing has crescent-shaped depressions which in co5 operation with the outer casing form a channel system for the heating or cooling medium.
    DE 199 36 077 Al discloses a temperature influencing roller with an outer casing and an inner casing, wherein 10 the outer casing has at least one radially oriented web dividing the annular gap formed between the outer casing and the inner casing.
    DE 196 13 433 Al discloses a heatable hollow roller, the 15 inner circumference of which has a groove path into which a heating tube can be laid. Here optimal thermal output might be guaranteed if the roll material is sufficiently thin. However, stiffness to the standard of the
    stiffness of20 achieved.calendering rollers isnotin anywayThe inventiontherefore has the objectofso designinga temperatureinfluencing roller andthemethodfor
    20186004 prh 27-11- 2018 production thereof that notwithstanding optimal heat 25 output a specific degree of stiffness, which otherwise merely calendering rollers have, is also guaranteed.
    In order to fulfil the object in terms of method a light, but not very bending-stiff, double-wall casing roller is 30 proposed in which temperature influencing guide shells are placed between core tube and outer tube at the inner wall of the outer tube, in which a casting mass is introduced between core tube and guide shells, in which after hardening of the casting mounted at the sandwich tubes mass bearing points are thus created, in which subsequently the introduction of covers and pins roll contour can sandwich tube is balanced by selective weights and in which the are mounted subsequently.
    obviously be reprocessed, distributor
    The outer for example by turning or grinding, such as weight correction to be able to for a weight check and be undertaken.
    Through the introduction of the casting mass the temperature influencing roller of double-casing type is made heavier and stiffer in bending in economic manner. Nevertheless, the large thermal transfer areas remain at the inner circumference of the outer tube, so that an optimal thermal transfer and thus an optimal temperature influencing of the materials to be processed are ensured.
    20186004 prh 27-11- 2018
    Production of the heat exchanger is also economic due to the fact that the core tube is bent from sheet metal and 20 welded to form a tube.
    It has proved desirable to mount anchors for the casting mass on the core tube, preferably to weld them to the core tube.
    The anchors provide an optimal connection between the core tube and the casting mass, so that after hardening of the casting mass no relative movement between the core tube and the casting mass is possible.
    In order to be able to better distribute the temperature influencing medium in the roller, for example by a multiple pass, it has proved desirable when positioning
    20186004 prh 27-11- 2018 the temperature influencing medium guide shells to insert flow distributor plates between the temperature influencing medium guide shells and the inner wall of the outer tube.
    It is of advantage if the temperature influencing medium guide shells are attached, preferably welded, to the inner wall of the outer tube. The temperature influencing medium guide shells thus form a lost formwork 10 for the casting mass, but in the later conducting of the temperature influencing medium contribute to reducing the flow resistance to the temperature influencing medium.
    However, there is also the possibility of withdrawing the temperature influencing guide shells from the sandwich composite after hardening of the casting mass.
    In this case, the temperature influencing medium channel is then joined on one side by the casing mass and on the 20 other side by the inner wall of the outer tube.
    The temperature influencing medium guide shells can be introduced axially oriented or circumferentially oriented or spirally into the space between the core 25 tube and outer tube. In order, in a given case, to obtain even better distribution of the temperature influencing medium, there is also the possible of introducing the temperature influencing medium guide shells into the outer tube axially oriented and/or 30 circumferentially oriented and/or spirally in regions.
    Thus, differently arranged temperature influencing medium guide shells can, in a given case, provide different rates of thermal transfer over the length of
    20186004 prh 27-11- 2018 the temperature influencing roller.
    It is of advantage if prior to introduction of the casting mass the core tube and the outer tube with the temperature influencing medium guide shells placed therebetween are placed on a foot cover to be centred, vertical and concentric and if the casting mass is introduced to well up from below or to fall down between the core tube and the temperature influencing medium 10 guide shells.
    In this mode of construction possible voids in the hardening casting masses are hardly a problem, so that it is usually possible to dispense with shaking devices.
    Apart from the insulating effect, the casting mass has the consequence internally of, substantially, an increase in the stiffness of the temperature influencing roller.
    A heat exchanger produced in accordance with the claimed method then has temperature influencing medium guide shells between the core tube and the outer tube, wherein a hardened casting mass frictionally and/or mechanically positively connected with the core tube and the outer 25 tube is arranged between the temperature influencing medium guide shells and the core tube and wherein the temperature influencing roller has, by way of at least one pin and by way of a distributor cover, connections for the spaces between the temperature influencing 30 medium guide shell and the outer tube, through which spaces the temperature influencing medium can flow.
    An even more balanced distribution of the temperature
    20186004 prh 27-11- 2018 influencing medium in the temperature influencing roller arises if flow guide plates are provided in the cavities formed between the temperature influencing medium guide shells and the inner wall of the outer tube.
    The invention is explained in more detail on the basis of a drawing which illustrates this and in which:
    Figure 1 shows a cross-section through a first 10 embodiment of a temperature influencing roller according to the invention,
    Figure 2 shows a detail of the temperature influencing roller according to Figure 1,
    Figure 3 shows a cross-section through a further embodiment of a temperature influencing roller according to the invention and
    Figure 4 shows a detail of Figure 3.
    Figures 1 and 2 show a first example of a temperature influencing roller 1 according to the invention. The temperature influencing roller 1 consists of a core tube 25 2 and an outer tube 3. Temperature influencing medium guide shells 5 are arranged at the inner surface 4 of the outer tube 3. It can be seen in Figure 2 that the temperature influencing medium guide shells 5 are fixedly connected with the inner surface 4 of the outer 30 tube 3.
    However, there is also the possibility of placing the temperature influencing guide shells 5 merely at the inner surface 4 of the outer tube 3 and then filling up the space between the core tube 2 and the temperature influencing medium guide shells 5 as well as the inner surface 4 of the outer tube 3 with a casting mass 6 and, after hardening of the casting mass 6, withdrawing the temperature influencing guide shells 5, which in Figure 2 are axially arranged, from the temperature influencing roller 1.
    Figure 2, however, shows the temperature influencing medium guide shells 5 as a lost formwork surrounded by the casting mass 6. Since the temperature influencing medium guide shells are attached to the inner surface 4 of the outer tube 3, a relative movement between the outer tube 3 and the casting mass 6 surrounding the
    temperature influencingmedium guideshells 5isexcludedafter hardeningof themass .In orderthat the castingmass 6also cannot executeanyrelativemovement withrespectto thecore tube2,
    20186004 prh 27-11- 2018 anchors 7 are provided at the core tube 2, the anchors being welded to the core tube 2 and being surrounded by the casting mass 6. When the casting mass 6 hardens, a connection between the anchors 7 and the casting mass 6 arises, which, since the anchors 7 are welded to the core tube 2, no longer permits any relative movement between casting mass 6 and core tube 2.
    The temperature influencing medium can circulate in the space 8 formed by the inner surface 4 of the outer tube 3 and the inner surfaces of the temperature influencing medium guide shells 5.
    In order to, for example, allow flow of a temperature influencing medium with different flows or temperature in one of the temperature influencing medium guide shells a flow distributor plate 9 dividing the space 8 into two 5 sub-chambers 8', 8'' is shown in Figure 2.
    By virtue of the construction which has been outlined and is shown in Figure 2, the temperature influencing medium covers a very large region of the inner surface 10 4 of the outer tube 3, so that an optimal temperature transfer from the temperature influencing medium to the outer tube 3 can take place. The hardened casting mass, for example refractory concrete or coil grout, forms an insulation towards the core tube so that the temperature influencing medium can act substantially outwardly towards the surface of the outer tube.
    Refractory concrete or coil grout are economic and have a good insulating effect inwardly and above all produce, after solidification thereof, an appreciable increase in the stiffness of the roller.
    20186004 prh 27-11- 2018
    However, the temperature influencing medium guide shells illustrated here and arranged to be axially parallel can also be radially oriented or spirally oriented. In 25 the case of radial orientation, feed and discharge lines to and from the individual radially arranged spaces of the temperature influencing medium guide plates have to be provided in the roller. In the case of axial or spiral orientation the feed to the spaces 8 can take 30 place from the distributor cover (not shown) arranged at the ends of the illustrated sandwich temperature influencing roller.
    20186004 prh 27-11- 2018
    The hardened casting mass makes substantial contribution to the stiffening of the temperature influencing roller so that this can even be operated within the range limits for a calendering roller.
    Figures 3 and 4 show a further solution according to the invention, in which the temperature influencing medium guide shells 5 by comparison with the temperature influencing medium guide shells 5 illustrated in Figure 10 2 are inversely connected with the inner surface 4 of the outer tube 3.
    Through this arrangement of the temperature influencing medium guide shells 5 a slightly worse thermal transfer 15 relative to the inner surface 4 of the outer tube 3 is achieved, since the inner surface 4, which is subject to incident flow, of the outer tube 3 is smaller than in
    Figure 2, but it can be seen in Figure 4 that larger quantities of casting mass, i.e. larger quantities of 20 hardened refractory concrete or coil grout, have been used, as a result of which an even greater degree of stiffness in bending has been imparted to the temperature influencing roller.
    Already through the use of a core tube bent from sheet metal and welded, but particularly through the use of the cost-advantageous casting mass, a favourable roller relatively stiff in bending can be created here.
    Expensive drilling, for example of a central bore, but 30 particularly of the peripheral bores, is saved here so that a temperature influencing roller, which is economic to produce, guarantees optimal temperature influencing performance and yet is still stiff in bending, is proposed which can be employed for use in the plastics film industry, the foodstuffs industry, the rubber and plastics industry and the non-woven material industry, but also as calendering or textured rollers.
    20186004 prh 27-11- 2018
    REFERENCE NUMERAL OVERVIEW
    12temperature influencingcore tuberoller53outer tube 4inner surface 5temperature influencingmedium guide shells 6casting mass 7anchor 108space 9flow distributor plate 15
    20186004 prh 27-11- 2018
    权利要求:
    Claims (10)
    [1] 1. Method of producing a heat exchanger, particularly temperature influencing roller (1) of double-casing
    5 type, with a core tube (2) and an outer tube (3), between which a temperature influencing medium can be conducted, and at the ends of the tubes with distributor covers carried by pins, characterised in that
    10 temperature influencing medium guide shells (5) are placed between the core tube (2) and the outer tube (3) at the inner wall (4) of the outer tube (3), a casting mass (6) is introduced between the core tube (2) and the temperature influencing medium guide shells 15 (5), after hardening of the casting mass (6) bearing points are mounted at the sandwich tubes thus created, subsequently the sandwich tube is balanced by selective introduction of weights and
    20 subsequently the distributor covers and pins are mounted.
    20186004 prh 27-11- 2018
    [2] 2. Method according to claim 1, characterised in that the core tube (2) is bent from sheet metal and
    25 welded to form a tube.
    [3] 3. Method according to claim 1 or 2, characterised in that anchors (7) for the casting mass (6) are mounted on, preferably welded to, the core
    3 0 tube (2) .
    [4] 4. Method according to any one of claims 1 to 3, characterised in that flow distributor plates (9)
    20186004 prh 27-11- 2018 are inserted between the temperature influencing medium guide shells (5) and the inner wall (4) of the outer tube (3) when positioning the temperature influencing medium guide shells (5).
    [5] 5. Method according to any one of claims 1 to 4, characterised in that the temperature influencing medium guide shells (5) are attached, preferably welded, to the inner wall (4) of the outer tube (3).
    [6] 6. Method according to any one of claims 1 to 4, characterised in that the temperature influencing medium guide shells (5) are withdrawable from the sandwich composite after hardening of the casting mass
    15 (6) .
    [7] 7. Method according to any one of claims 1 to 5, characterised in that the temperature influencing medium guide shells (5) are introduced into the outer
    20 tube (3) in axially oriented or circumferentially oriented or spiral form or in regionally axially oriented and/or circumferentially oriented and/or spiral form.
    [8] 8. Method according to any one of claims 1 to 7,
    25 characterised in that prior to introduction of the casting mass (6) the core tube (2) and the outer tube (3) with the temperature influencing medium guide shells (5) placed therebetween are placed on a foot cover to be centred, vertical and concentric and the casting mass
    30 (6) is introduced to well up from below or drop down between the core tube (2) and temperature influencing medium guide shells (5).
    20186004 prh 27-11- 2018
    [9] 9. Heat exchanger, particularly temperature influencing roller (1) of double-casing type, with a core tube (2) and an outer tube (3), between which a temperature influencing medium can be conducted, and at
    5 the ends of the tubes with distributor covers carried by pins, characterised in that temperature influencing medium guide shells (5) are provided between the core tube (2), which consists of 10 bent and welded sheet metal, and the outer tube (3), a hardened casting mass (6) frictionally and/or mechanically positively connected with the core tube (2) and the outer tube (3) is arranged between the temperature influencing medium guide shells (5) and the 15 core tube (2) and the intermediate spaces (8) between the temperature influencing medium guide shells (5) and the outer tube (3) can be flowed through by temperature influencing medium by way of at least one pin and a distributor 20 cover.
    [10] 10. Heat exchanger according to claim 9, characterised in that flow distributor plates (9) are provided in the cavities (8) formed between the
    25 temperature influencing medium guide shells (5) and the inner wall (4) of the outer tube (3).
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2504471A1|1975-02-04|1976-08-05|Wilhelm Reckermann|Heating or cooling cylinder with spiral passages - simplified manufacture by corrugation of inner cylinder reduces cost|
    DE19613433A1|1995-04-20|1996-12-05|Barmag Barmer Maschf|Heated roller which is economically produced|
    DE19638079A1|1996-09-19|1998-04-02|Intus Maschinen Gmbh|Composite tube as a roller tube|
    DE19936077A1|1999-07-30|2001-04-26|Kelzenberg & Co Gmbh & Co Kg|Roll with temperature control fluid under outer shell has radial fins that define flow channel attached to outer shell|
    DE10353288B4|2003-11-14|2011-01-05|Shw Casting Technologies Gmbh|Temperable roller|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102017221615.8A|DE102017221615B3|2017-11-30|2017-11-30|Method of manufacturing a heat exchanger and heat exchanger|
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