FI119122B - thermo roll - Google Patents

Description

119122

The thermo roll

The present invention relates to fiber web machines, preferably paper, pulp and board machines.

The invention relates to a thermal roll according to the preamble of the independent claims 1 and 20.

10

In recent years, calendering speeds have risen sharply. In order to achieve the required calendering effect, the surface temperatures of the thermal rolls also had to be raised to 200 ° C to 250 ° C. The high running speed combined with the high surface temperature of the roll means that the heat input to the thermal roller is very high, typically 200 kW / m in new, eg multi-nip processes. In addition, the use of water humidification prior to the calender is becoming more common, further increasing the required heat output.

• ^ * j · Thermal rolls are generally heated in a roll shell, for example, drilled

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20 through heat exchange media flow channels. The heat transfer medium is used for, for example, oil, water or steam In order to achieve the required thermal output in the future, the ducts must be located very close to the surface of the roll. The effect of the channels on the surface temperature and radial displacement profile (so-called gingerbread)

M1 * ... * effect) is growing very strongly. Surface temperature variations can cause paper quality problems and radial displacement variations, in turn, can cause roller vibration.

• * • · · '** · * In order to minimize these side effects, the number of channels must be increased • * · 1 * · *; ·' vigorously and accordingly reduced in size.

* · · • · · • · · · · · · ♦

As is known, the flow is introduced into the jacket of the thermal roll via the ·; · *: 30 supply channels at the roll end (s), for example bores. These drillings start from the manifolds at the end of the roller and connect to diaphragm flow channels such as drill holes. In some embodiments, the manifolds have their own flow channel, such as an end bore, for each bore of the diaper, while in some embodiments, the outflow from the manifold divides outwardly from each one of the outflow passages into each of the outflow channels.

The current amount of the heating channels (approx. 15-50)-side end piece is still relatively easy to manufacture. As the number of heating ducts increases to near the precipitation, it becomes very difficult, if not impossible, to fit the existing end pieces together with the bolt holes required to connect the end and jacket.

In addition to the above problem, the current very hot, the problem of thermo rolls of the roll side and the drive side of the end pieces of differing heat-15 pötilakenttä. When the forward-flow is taken care of through the side of the end member-side end piece is to use the hotter side of the end pieces. This causes the operating side and the drive side of the end pieces radial heat-expanding 'are different. The difference between temperature and thermal expansion is most pronounced ·: · on large rollers. This difference is reflected in the periphery of the diaper, which is also reflected in the • «· · 20 nip line load profile. The best situation would then be that both the sheath and j ': both end pieces expand equally radially.

It is known to use Teflon tubes or, alternatively, steel tubes with an oil pocket to insulate the sheath edges. Also known from the application publication FI934635 25 as an insulating sleeve at the edge of a jacket to insulate a heating medium passage through a shaft of a thermal roller, wherein two spaced-apart enclosed sheaths define the gas between them. closed space.

These insulating sleeves have traditionally been designed to prevent the surface temperature of the jacket from rising in the non-thermal area of the jacket, i.e. the outer area of the nipple.

• · «• · * • · • · 3 119122

The overall object of the present invention is to eliminate or at least substantially reduce the above drawbacks and weaknesses. The object is to provide a thermal roll with end pieces having a large number of heating channels as simple as possible and thus simple to manufacture, and furthermore to provide a thermal roll having a radial displacement profile of the roll shell, particularly in the nip area of the fibrous web.

The characteristic features of the invention are set forth in the characterizing part of the independent claims 1 and 20.

With respect to other features and advantages of the invention, reference will be made to the dependent claims and to the following specific part of the specification, which describes in detail, but by way of example only, preferred embodiments of the invention and their embodiments. The various embodiments of the invention may also be combined with one another in a single thermal roll.

The invention will now be described with reference to the accompanying exemplary figures 9 * · 20, which illustrate the thermo roll according to the invention without limiting the invention to the figures shown in the figures.

Figure 1 shows a known flow passage solution in connection with the end roll ♦ · * · · · * of the thermal roller, partially cut away.

Fig. 2 is a section I -1 of Fig. 1.

• · ♦ ♦ ··· · «· ϊ. Figure 3 is a sectional view II-II in Figure 1.

• • · · · · · · # 30 ♦ Figure 4 shows the known thermo roll drive side end piece structure.

«· · ♦ · · • • • 4 119122

Fig. 5 shows known insulating sleeves that can be used at the ends of the flow channels of a thermal roll casing.

Figs. 6A and 6B show the ends of the thermal coils according to preferred embodiments of the invention.

Fig. 7 shows a thermal roller according to a preferred embodiment of the invention and a second end piece thereof fixed to the sheath.

10

Fig. 8 shows a first insulating sleeve of a thermal roll according to a preferred embodiment of the invention.

Figure 9 shows an example of an insulating end piece bore.

15

Fig. 10 shows an integral sleeve and a soldering piece in the flow channel of a thermo roll casing in the flow path of the fiber web.

Let us first consider an example of a known thermal roller and its end piece, ··· 20, whose flow channel arrangement is shown in Figures 1, 2 and 3. Figure 1 shows the end piece 2 of the treatment head of a thermal roller 1 secured to a sheath 20 is • * outer diameter 20a and inner diameter 20b. The flow of the heat transfer medium is introduced into the end piece 2 of the * M * thermo roll 1 through the outlet manifold 17 and respectively passed from the end piece 2 through the return manifold 18 which are held in place by a lid 19 attached to the end piece 2.

* * · • f * • »• * · • * •»

The flow is led directly from the end piece 2 of the thermal roller 1 to the jacket 20 of the thermal roller, i.e., without intermediate parts, from the flow channels / bores 3, 4 of the end piece 2 to the flow channels 21, 22 and vice versa. In the exemplary embodiment, the outflow channel 3 and the return flow channel 4 of the end piece 2 30 are in pairs at the same circumferential plane, except for the outer portion of the end piece 2. This leaves more space for the bolt holes 5 in the circumferential direction. The positioning of the outflow duct 3 and the return flow duct 4 in the outer portion of the end piece 2, i.e. in the outer peripheral region of the end piece 2, is illustrated in more detail by the sectional drawings of Figures 2 and 3.

5

The flow of the exemplary structure is such that each outflow channel 3 has its own return flow channel 4. Thereby, dividing the outflow from one outflow bore 3 of the end piece 2 from the outflow manifold 17 to several outflow bores 21 of the diaper 20 and combining the returning to block 18 is practically impossible. However, if the number of heating channels is very large, this would be mandatory in order to leave sufficient space for both the end piece boreholes and the bolt holes.

Figure I-I in Figure 1 and section II-II in Figure 1 in Figure 2 illustrate flow channels 3, 4; 21, 22 and Bolt Hole 5 Placements.

Characterized the drive side of the end piece 23 of the structural example of Figure 4 is structured to * · · · ... · 20 such that the thermo roll from the one end piece 20 of the diaper 23 of the forward-flow 21 ·· *! V is turned in the end piece 23 into a return flow 22 of the sheath 20 in one flow passage extending over the entire circumference * *, which is formed as a groove 24. The groove 24 is formed "··" on the end face 23 "of the end piece 23 · * Towards the jacket 20. The axial length and shape of this groove 24 is defined 25 so as to minimize the pressure drop it causes Due to this, the axial length L24 of the groove 24 is small. * · * · '1 * drive-side end piece 23 a warming area. As the area is a small area of «» m • · * t' "*, and a large proportion of its produced heat is lost to the environment of the end piece 23 of the outer · ** • · * ·· · * through the surface, the average temperature of the end piece and thus also the radial "" 30 ί-direction thermal expansion remain substantially-side endcap bellow 2 • φ 0 • · · • »• · 6 119122 values. As stated above, this causes problems with the nip line load profile.

Figure 5 illustrates known Teflon-5 tubes 25 used as insulating sleeves at the edges of the jacket, or alternatively steel tubes 26 having an oil pocket 26 '. Cylindrical insulating sleeves 25; 26 is a sectional view taken along their central axis. These insulating sleeves 25; The purpose of 26, when installed in the flow channels 21, 22 of the thermal roller 1 as shown in Fig. 5, has traditionally been to prevent the surface temperature of the jacket 20 from rising in the non-thermal region of the jacket. Figure 5 shows a schematic example of the location of the fiber web W with respect to the sheath 20 of the thermal roll 1. Insulating sleeve 25; 26 is shown to the right of the right edge W 'of the fibrous web, i.e. outside the web region. Insulating sleeve 25; 26 is located in the area of the jacket 20 from which it is not intended to transfer thermal power to the fibrous web W.

Figs. 6A, 6B and 7 show some thermal coils 30 according to the new embodiment of the invention. Figs. 6A and 6B show two preferred flow-channel solutions of a thermo roll 30 with a first end piece 31; 3Γ, which preferably care-side end piece 31; 31 'is fixed to the housing 20. Figure 7 is a health • * 30 motelan second end piece 53 which is preferably drive-side end piece »» • 4 * 4 * ··· 20 53, which is fixed to the housing 20. The large number of heating channels comprise ♦ · · * '' first end piece 31; 31 'and the second end piece 53 are as simple as possible in construction and thus simple to fabricate.

m · a · »· * • • • 4 · 9a *** Figures 6A and 6B is not shown front side of the end piece 31; 31 'of the pin 32

25, because they are prior art. 6A and 6B

• in the examples, the flow follows the arrows in the figure. The outflow 33 4 * # · * is stiffened in the first end piece 31; 31 'to the flow channels and the return flow are tracked in the first end paragraph to the return flow channels, also described by the arrows in connection with the above references. Of course, the direction of flow can also be reversed.

* · • · «· • 4 • 4 July 119122 the heat transfer medium outward flow 33, which will be tending side of the end piece 31; 3Γ from the flow pipe of the inner hole of the shaft pin, is traced to pass between two flanges, of which the end piece 31; 3Γ the first first flange 35 viewed from the direction of the pivot pin is secured, for example, by screws 35 'to the end piece 31; 3Γ and the inner second flange 36 is secured, for example, by screws 36 ′ to the jacket 20 of the thermal roller 30. Heat conduction from the heat transfer medium to the end piece 31; 3Γ secured to the end piece through the first flange 35, in accordance with one embodiment of the invention, is prevented by the insertion 37 10 between the end piece and the first flange. The insulation 37 may be e.g. a static oil layer.

At the end of the thermal roll 30, the flow 33 is tracked in the first end 31; 3Γ to pass through flow space 39; 39 '. In the opposite direction of flow, return flow 34 is arranged to pass through flow space 39; 39 '. Flow-15 mode 39; 39 'is comprised of flow grooves made of the thermo roll sheath 20 and the first end piece 31; 31 ', with the flow grooves in the jacket 20 or the first end piece 31; 31 'or both, in which case the flow grooves are in both the jacket and the first end;

»« ·· 20 Γ · '; Fig. 6A shows how at the end of the thermo roll 30 a flow state 39 is formed ·; · *! the first end piece 31, at its end end facing the sheath 20, formed * by the grooves 38 and the surface 20 'of the sheath end region. The flow 33 flows through the flow paths, for example, in the flow space 39 formed by the machined grooves 38 and the surface 20 '25 of the end region of the sheath 20. This flow state 39 can consist of either individual channels or flow state 39. may be a chamber over the entire circumference of the end piece. * * · * ... · mio.

In Fig. 6A, the outflow flow 33 is led from the flow space 39 through a small number of bores 30 or e.g. through the grooves of the aforementioned type to the end piece 31 and the sheath 20. Outside the distribution diameter of the studs 40 or other fastening members, where the outflow flow is again assembled in the flow chamber 41.

In Fig. 6A, the axial shape 5 in the end member 31 of the flow chamber 41 is preferably formed by machining in the axial direction, and the surface 20 'of the end region of the jacket 20 serves as one wall of the flow chamber 41 enclosing the flow channel. From this flow chamber 41, the outflow flow is again passed through bores or, e.g., the grooves 42 similar to the aforementioned grooves 38, to the outflow channels 43 of the diaper 20, i.e. the number 10 of these bores / grooves 42 is the same as the corresponding flow channels 43.

Fig. 6B shows how at the end of the thermal roller 30, the flow space 39 'is formed by the grooves 38' formed at the end of the sheath 20, and the surface of the first end piece 31 'facing the sheath. This flow space 39 'may consist of either individual passageways or the flow space 39' may be a chamber extending over the entire circumference of the end of the jacket.

In Fig. 6B, the outflow flow 33 is led from the flow space 39 'through a small number of bores or e.g. through the aforementioned grooves through the sheath 20 and outside the distribution diameter of the bolt 40 or other fastening members of the sheath 20, the flow is again collected in the flow chamber 41 '.

•••• S • · Φ · «* | * | As shown in Fig. 6B, the axial shape of the flow chamber 41 'at the end of the jacket 20 is preferably formed by axial machining, and the end cap. , The end of the diaphragm 31 ', i.e. the surface facing the diaper, acts as one wall of the flow chamber 41' • · # • · *, enclosing the shape of the flow chamber in the flow channel. From this • # * · * flow chamber 41 ', the outflow flow is again led through bores or through the grooves 42', such as the grooves 38 'mentioned above, to the outflow channels 43 of the diaper 20.

Thus, the number of these bores / grooves 42 'is the same as the corresponding outflow channels 30 43.

M · • · · • • • f 9 119122

The flow paths for the flow 33 are thus formed at the end of the jacket 20 of the thermal roller 30 in Fig. 6B, rather than at the end as shown in Fig. 6A.

5

Further, it is clear that at the end of the thermal roll 30, the flow space 39, 39 'may consist of grooves 38' formed in the first end piece 31 and grooves 38 'in the sheath 20, not shown. For example, these grooves 38 and 38 'may be aligned.

10

by means of Figure 7 shows how the thermo roll 30 outward flow 34 is turned pa-luuvirtaukseksi 34. This is accomplished by the thermo roll 30 drive-side end piece 53 together with the whole circumference of the extending flow channel which is formed by the vir tausuraksi 54. The thermo roll-side end piece 53 will be discussed later 15 of this specification, .

6A and 6B, the return flow 34 from the return flow ducts 44 of the sheath 20 of the thermal roll 30 is conducted through bores / grooves 44 'to one of the chambers 45 located outside the distribution diameter of the connecting bolts 40 or other fasteners. A chamber 45 ·, · 20 is formed in the end piece 31 of the thermal roll 30; 31 'in the radial direction is preferably O ·; *, · By machining, and the upper surface of chamber 45 is formed by a cover 46 connected to an end piece, e.g. by a welder. From this chamber 45, the return flow is conducted through a small number of · · bores inside the end diameter M · • * ··· where the return flow is finally put together again. Preferably, the return flow 34 is assembled in a flow passage 48 formed by a first flange 35 attached to the end piece and formed by the surface of the end piece. The return flow 34 is conducted from the flow passage 48 to the non-shown end piece shaft. to the return flow duct within pin 32. It will be apparent to one skilled in the art that the flow direction of the heat transfer medium described above may also be reversed.

·: · *: 30 «· · • * • · •« ίο 119122

Figure 7 shows the invention, the termote-LAN 30 the drive-side end piece 53 virtausura according to a preferred embodiment 54. Virtausura 54 which extends from the end piece 53 across the purpose of which has previously been mainly reverse flow, the entire periphery is formed of dimensions in a new way. The axial length L54 of the thermal groove 54 of the flow groove 54 5 is shaped so that its heating action on the end piece 53 is as advantageous as possible with respect to the radial displacement profile due to the thermal expansion of the thermal roll 30. Since the prior has been a problem in very hot thermo rolls of the roll side and the drive side of the end pieces of differing temperature field may be of the biscuit-10 Non the present embodiment, the flow groove 54 design prevents a situation where the front side first end piece to the drive-side one of the end pieces of substantially hotter. Side and the drive side of the radial thermal expansion of the end pieces can thus be very close to each other. The flow groove 54 thus differs from the conventional solution, in particular in that the axial length L54 of its thermal roller 15 is considerably larger, in the order of 70-150 mm.

Preferably, the drive side of the end piece 53 of the outer surface, in particular the external front surface of the flange 53 'is provided with a thermal insulation 55, for example, an insulating ilmaker- · · layer. This measure is influenced by the fact that the front side 20 first end member 31 to the drive side of the second end piece 53 with possible; same temperature.

• ·

In Figure 8, a new and inventive thermo roll 30 first insulating shown «« · 65. The first insulating sleeve 65 is intended to be placed in the thermo roll 30 mantle 25 20 end, for example, drive-side end piece 53 side end, in particular • · * * · * · * a heat transfer medium flow channels 43 , 44 to the ends. The first insulating sleeve 65 is shown both cut along its central axis and in section A-A, where two alternative ways of shaping the insulating sleeve are shown. The shape of the insulating area of the insulating sleeve 65 ··· is preferably shaped such that its thermal roll 30 ····; The warming effect of the 20 peripheral areas of the diaper 30 is as advantageous as possible with respect to the radial displacement profile due to the thermal expansion of the thermode. The structure of the insulating sleeve 65 makes it possible to limit and direct the insulating effect of the insulating sleeve.

According to a preferred embodiment of the invention, the first dielectric sleeve 65 is uninsulated over a given sector angle α or at a given La angle and at a certain axial direction L a of the insulating sleeve portion. Thus, the inner surface of the insulating sleeves 65 mounted on the thermo roll 30, i.e. the center line side of the thermo roll 30, is uninsulated over a given sector angle α or along the La portion of the insulating sleeve portion 10 and at a certain axial position / length Les. The insulating sleeve 65 sectors α / circumferential portion La or axially point / length Les of which the sleeves are uninsulated are by no means fixed, but of course these properties have certain limits in practical application.

Due to the structure of the heat transfer rolls and thermal insulation of the thermal roll 30, as described above, the radial displacement profile of the thermal roll shell 20 is as flat as possible, particularly in the nip area of the fibrous web.

In addition to the preceding embodiments, it is recommended that the flow channels in the first end piece 31 of the thermal roll 30 M · 20 be insulated with static M *. oil layer when previously used for example Teflon tubes.

** ·· · • • · · · ·· "Figure 9 shows an example of fastidious end piece of flow channel *** * • ··· 'front side of the end piece 31 of bore 47 which leads from the chamber 45 coupling bolts. 40, pitch diameter 25 on the inside of the chamber 48. In this case, the bore 47 consists of two straight bore sections at right angles to each other. The insulated flow channel may, of course, also have a shape other than a straight bore. a second insulating sleeve 67 for defining and forming the oil layer 66, comprising a tube 68 aligned and secured with a flange "**! The flow 34 passes through the pipe and a static oil layer is formed between the outer wall of the pipe 68 and the inner wall of the bore 47. The second insulating sleeve 67 may also be flexible and have at least one flange 69 for alignment and attachment to the flow channel walls.

The second insulating sleeves 67 of the end piece may be made of a material having a higher coefficient of thermal expansion than the end piece 31; 53 material. Thereby, when the thermal roller 30 is heated, the compression fit of the second insulating sleeves 67 and the separate mechanical attachment to the second insulating sleeves 67 and the end piece 31 are improved; 53 is not required.

10

In a preferred embodiment of the invention, insulating sleeves 65 are mounted on the peripheral oil ducts 43, 44 of the jacket 20 of the thermal roll 30 at the drive end of the thermal roll and at the treatment end of the roll. In addition, the peripheral oil passages 43, 44 are provided with a soldering blade 69 in the region of the web of the fibrous web.

15

Fig. 10 shows that the insulating sleeves 65 and the soldering member 69 are attached to one another in one piece, so that the whole part can be both mounted and dismantled at once. The structure is secured by a connection 70 to the sheath 20 of the thermal roll 30 only at its other end. Such a mounting end allows for any different thermal expansion between the sheath 20 and the soldering sleeve 69-65. The above **** ί. * Connection 70 may be implemented, for example, by a screw connection or a press fit or by any known * or a combination of multiple connection methods. The displacement body is provided with one or more brackets 71 which align the blast body 69 • '* · * * · ·' in the center of the flow passage 43, 44.

25

* i I

* · ·

The thermal roll 30 according to the invention is a heated or cooled roll, whereby it is a calender thermal roller or dryer cylinder or a press heating roll or a cooling roll of a press or other machine for use on a paper or board line. ··· • * * · · · 'roll to be measured or cooled.

•: ** i 30 ·· * f · t m m • · 13 119122

The invention has been described above only by means of some preferred embodiments thereof. However, this is not intended to limit the invention in any way, and as will be apparent to one skilled in the art, many alternative solutions, combinations of features, and modifications of the foregoing embodiments are possible within the scope of the inventive concept and the appended claims.

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* · «T tt ·· • te • t • t ··· • · • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • t · t · t • t • ·

Claims (21)

A thermocouple (30) comprising a sheath (20) and an end piece (31; 53) attached to each end of the manifold, wherein an inlet flow (33) of a heat transfer medium to the inlet flow channels (43) in the manifold of the thermocouple and a return flow (34) from return flow channels (44) in the male input is provided via inlet flow channels and return flow channels in the first end piece (31) and the reversal of inlet flow (33) to return flow (34) is arranged by means of flow (24). ) in the second end piece (53) and at the end of the thermo roll 10 (30), the input or return flow (33; 34) is arranged to pass through a flow space (39; 39 ') formed by flow barrier (38; 38 '), which are made in connection with the joint between the male end (20) and the first end piece (31; 3Γ) of the thermo-roller in such a way that the flow lock is in the first end piece (31) or in the male end (20) or in the bed, kännetec This means that before the flow space (39; 39 ') in the direction of the inlet flow (33) and after the flow space (39; 39') in the direction of the return flow (34), the flow of the heat transfer medium is arranged to pass between two flanges, of said first flange (35) being fixed to said first end piece (31; 3Γ) and said second flange (36) being fixed to said male end (20), wherein said first end piece (31; 3Γ) to said first flange (35) is provided an insulation ♦ (20) (37) comprising a static oil layer. 2. Thermal roller according to claim 1, characterized in that the first end piece ·· * * ·. Ϊ (31; 3Γ) is the end piece on the maintenance side. M »• · • · ··· Thermal roller according to claim 1, characterized in that the second end piece • * * (53) is the end piece on the operating side. 4. Thermal rollers according to claim 1, characterized in that the flow space ··· * ··· * (39; 399) comprises individual channels. *: · *: 30 ·· · f · ♦ • · • «20 119122 Thermo-roller according to claim 1, characterized in that the flow space (39; 39 ') comprises a chamber extending over the entire circumference of the first end piece (31; 3Γ) or over the entire circumference of the end of the male end (20). Thermo-roller according to claim 1, characterized in that the flow space (39) is formed by rafters (38) formed in the first end piece (31), in the end against the male end (20) thereof, and by the surface (20 ') of the end region of the mäntein. Thermo-roller according to claim 1, characterized in that the flow space 10 (39 ') is formed by rafters (38') formed at the end of the male end (20) and of the surface facing the male end of the first end piece (3Γ). Thermal roller according to claim 1, characterized in that the flow space (39,39 ') is formed by rafters (38) formed in the first end piece (31) and of rafters (38') 15 formed in men (20). Thermal roller according to any of claims 1-8, characterized in that it comprises a flow chamber (41; 4Γ) for the heat transfer medium outside of the dividing diameter, 1 · 1 tem for connecting bolts (40) or other fastening elements for the first end piece. 20 (31; 3Γ) and male ends (20), which chamber is arranged to lie after the flow outlet (1) · space (39; 39 ') as seen in the direction of the inlet flow (33) and before the flow outlet (1) (39; 39 ') viewed in the direction of the return flow (34). ··· ·· 1 ♦ · «· • · * ··· 1 Thermo-roller according to claim 9, characterized in that it comprises either 25 drillings in the first end piece (31) or rafters formed at the end of this duct piece, or drills or rafters at the end of the manifold (20), via which flow of heat transfer medium is arranged to flow between the flow space (39; 39 ') ·· ·: .1 and the flow chamber (41; 41'). ··· «· •» ·· 1 • · · · • · • · • · 21 119122 Thermal roller according to claim 9 or 10, characterized in that the flow chamber (41) is formed by the surface of the end region (20 *) of the male end (20) and of an axially directed configuration in the first end piece (31), or the flow chamber ( 41 ') is formed by an axially directed embodiment at the end of the male end (20) and by the surface of the first end piece (3 Γ). Thermal roller according to any of claims 9-11, characterized in that it comprises bores in the first end piece (31) or latches (42) formed at the end of this end piece, or bores in men (20) or latches (42). ") Formed at the end of this jacket, through which the flow of heat transfer medium is arranged to pass between the flow chamber (41; 41 ') and the corresponding flow channels in the men (20). Thermal roller according to any of claims 1-12, characterized in that it comprises a flow barrier (54) in the second end piece (53), which interferes with connection with the flow channels (43, 44) in men (20). and which extends over the entire circumference of this end piece and which flow bar has a length (L54) of 70-150 mm in the axial direction of the thermo roll. Thermal roller according to any one of claims 1-13, characterized in that the outer ··· surface of the second end piece (53), in particular the outer rim surface (53 ') of the flange part ϊ *** ϊ. , is provided with thermal insulation ring (55), which for example consists of an insulating * * air layer. 15. Thermo-roll according to any of claims 1-14, characterized in that it re-. Includes a first insulating sleeve (65) for insertion into the ends of the flow channels • t · (43.44) in the male terminal (20), said sleeve being uninsulated over a distance of a specified sector angle (a) or above the distance (La) of a section of the circumference of the insulating sleeve and ·· · • ·: · * on a particular section (Loose) in the axis direction / over a certain length in the axis direction. «* · • · • ·» «» • · • · * • * · • · • · 22 119122 16, Thermal rolls according to any of claims 1-15, characterized in that the flow channels in the first end piece (31; 3Γ) are insulated by means of a static oil layer (66). Thermal roll according to claim 16, characterized in that the static oil layer (66) is formed between a second insulating sleeve (67) and the inner wall of a flow channel (47). 18. Thermal roll according to claim 17, characterized in that the second insulating sleeve (67) comprises a tube (68) having at least one flange (69) for alignment and attachment. Thermal roll according to any of claims 1-18, characterized in that it is a thermal roll in a calender, a drying roll, a heating roll or a cooling roll in a press, or any other heated or coolable roll in a machine used on the machine. a line of paper or cardboard. A thermocouple (30) comprising a sheath (20) and an end piece (31; 53) fixed at each end of the manifold, wherein an inlet flow (33) of a heat transfer medium into the inlet flow channels (43) in the manifold of the thermocouple and a return flow (34) from return flow channels (44) in the manifold is arranged via inlet flow channels and return flow channels in the first end piece (31) and where the reversal of the inlet flow (33) For return flow (34) is arranged by means of a flow channel (24) in the second end piece (53) and at the end of the thermal roller 25 (30) the input or return flow (33; 34) is arranged. passing through a flow space (39; 395) formed by flow barriers (38; 38 ') formed in connection with the joint between the manifold (20) and the first end piece (31; 3Γ) of the thermo- ·· · • '/ roller on the grain means that the flow lock is in the first end piece (31) or in the male (20) or in the bed, characterized in that the thermal roller comprises one of the channels (43, 44) in the flow channels (43, 44). male end (20) in each individual case with one end attachable (70) ·· · • · · • • • 23 119122 continuous portion, comprising a first insulating sleeve (65) at the operating end of the thermal roller, a displacement piece (69) in the region of the race of the fiber web (W) and a second first insulating sleeve (65) in the care end of the thermal roller. 21. Thermal roll according to claim 20, characterized in that it is a thermal roll in a calender, a drying roll, a heated roll or a cooling roll in a press, or any other heated or coolable roll in a machine used on a paper or cardboard line. . ·· «» * ·· ··· • »• · ··· ·· · · · · · · · · · · · · · · ♦ · · · · · · ♦ ·« · t · • * · · · · · ··· · ♦ · · · · · · ♦ ♦ · ··· t · · ·· · • ♦ · • · • ♦