JPS63105393A - Band material drier - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a drying apparatus suitable for drying wet strip materials used in the production of woven fabrics, nonwoven fabrics, paperboards, processed papers, and the like.

(Prior art) An apparatus for manufacturing the product by sequentially wrapping and transferring a wet band material around one or more internally heated heating cylinders each mounted on a shaft on a machine frame, and drying the material by repeating heating and moisture release. For example, there is a multi-tube drying device which eliminates the disadvantage of drying loss of the bottom heating cylinder as shown in Japanese Patent Publication No. 60-29800, and a multi-tube drying device as shown in Japanese Utility Model Publication No. 59-55600. Military style drying equipment, Special Publication 1984-184
No. 0 and Japanese Patent Publication No. 61-11558, the so-called twin-canvas type polyurethane tape is capable of adjusting the moisture content distribution in the width direction of the wet strip material (hereinafter referred to as the moisture O file). Cylindrical drying device, JP-A-58-15609
Many different types of drying devices are known, such as a so-called multi-tubular canvas drying device as shown in Publication No. 5.

(Problems to be Solved by the Invention) In the conventional drying apparatus described above, the wet band material is partially wrapped directly around the outer peripheral surface of the heating cylinder or indirectly wrapped around the outer peripheral surface of the heating cylinder and heated. However, a large amount of wasted heat was radiated from the end plate surface and exposed outer peripheral surface of the heating cylinder toward the outside air. In recent years, one lap speed has been increased to 1500 to improve productivity.
m7KM, wide, high-speed, multi-tube drying equipment equipped with many heating tubes with a width of 40 m or more has come into use. With this increase in speed, the time required to heat the strip material in the heating tubes is shortened, so long multi-tube drying apparatuses with over 100 heating tubes have also appeared. Therefore, not only does the total heat dissipation area expand by increasing the number of heating points, but also by increasing the speed, the heat transfer rate from the end plate surface and exposed outer peripheral surface of the heating cylinder to the outside air increases. However, this increase in heat radiation loss cannot be ignored. Therefore, in order to reduce heat loss, ideas such as housing the device in a hood and guiding the heat radiated outside air to a collecting tact and recovering heat in a heat exchanger, and wrapping the end surface of the heating tube with a heat insulating panel, etc. were proposed. Many things have been done. However, even if the entire device is housed in an airtight hood and the heat from the hot air is recovered by preventing the hot air from leaking outside, the heat recovery rate is limited to about 60% due to the bulk, and the airtight hood There is also a lot of hot air leaking through the gaps in the hood and heat dissipating from the vast outer wall of the hood. Furthermore, the amount of heat radiation and the amount of hot air leaking increase as the atmospheric temperature within the closed hood increases in order to promote moisture release from the strip material.

Further, even if the mirror plate surface of the heated area is wrapped with a heat insulating panel or the like, the amount of heat radiated from the mirror plate surface to the outside air is only small, so no significant ripening effect can be expected. i.e. 1
For example, a commonly used outer diameter of 1.5 m and a width of approximately 6 to + Om
In a device equipped with a heating cylinder, the area ratio of the mirror plate surface of the heating cylinder to the exposed outer circumferential surface is about 1:5 to 4.5 or more, and the average ratio of the mirror plate surface and the exposed outer circumferential surface to the outside air is approximately 1:5 to 4.5 or more. If the outside air is in a stationary state, the speed difference ratio will be approximately 1:2.

Therefore, the heat transfer ratio between the mirror plate surface and the exposed portion of the outer peripheral surface and the outside air is estimated to be about 1=6 to 9 or more.

Furthermore, a general-purpose heating cylinder has a wall thickness of about 25°C and is heated to about 100°C by supplying water vapor of about 2 aji+ or more inside.
Since it is a cast iron pressure vessel with a diameter of m/m or more, the higher speed reduces the heat conduction resistance from the outer circumferential surface and mirror plate surface to the outside air, increasing heat radiation to the outside air and increasing the temperature difference between the outer circumference and the inner and outer surfaces. At the same time, the amount of heat stored in the outer cast iron portion of the outer periphery decreases, and the amount of heat supplied to the strip becomes insufficient. In addition, since the heating time of the strip material per heating cylinder becomes shorter, the amount of heat supplied to the strip material becomes even more inefficient, and the strip material cannot be heated sufficiently. Therefore, it was necessary to take measures such as increasing the temperature of the supplied steam or adding additional heating cylinders.

In addition, the moisture content and O-file of the strip material usually fluctuates in various ways before and/or during the drying process, causing wrinkles, swelling, etc., or breakage of the strip material. Therefore, many heating cylinders equipped with moisture zero file adjustment means have been proposed, as shown in Japanese Patent Publication No. 61-11557 and Utility Model Publication No. 61-597, but none of these have internal A high heat conductive barrier such as a heat insulating sheet or a water film is interposed in the heat transfer path from the heat source to the outer circumferential surface to partially suppress the heat flowing along the heat transfer path and prevent permanent overdrying. The amount of heat supplied to the strip material is limited. However, with such a means in which the adjustment position cannot be changed and the adjustment amount is fixed, it is not possible to equalize the moisture content and O-film value which varies in the width direction. In addition, the use of said means
Since the amount of heat supplied to the strip material is suppressed, even if only partially, by the heat conductive resistor, the drying capacity per heating cylinder is relatively reduced, which is also the underlying cause of the increase in the heating cylinder. . In particular, electromagnetic induction heating means as shown in JP-A No. 61-75897 and far-infrared heating means as shown in Utility Model Application No. 61-45299 can be used to actively heat transfer without limiting the amount of heat transfer. Measures have been proposed to correct moisture and O-file fluctuations by heating the strip material with a high moisture content, but all of these methods require complicated and expensive heating equipment and require a large installation space. However, since it heats the high-speed rotary tube or the wet strip material that moves at high speed, it not only tends to cause excessive or insufficient dryness in the heated part of the strip material, but also causes a large amount of heat dissipation. There were problems in terms of controllability and power saving, such as wasting expensive electricity.
Means for correcting the unevenness of the moisture profile by considering and discharging damp air inside the pocket as shown in the various publications of No. 284, and further shown in Japanese Patent Publication No. 6+-11358. A moisture filter O file adjustment means has been devised, which is comprised of rotatably arranged airflow changing sheet metals that are directly adjacent to the transition strip material or adjacent to the transition strip material via a canvas strip. The air layer that moves in a laminar state around the transition strip material is disturbed by the hot air flow discharged from the air exhaust mechanism or by the air flow change plate, and becomes turbulent and diffuses. It is not possible to concentrate the desired airflow to the airflow, and not only is it not possible to finely adjust the moisture filter, but the adjustable range is narrow.
In order to widen the adjustable range, if the hot air flow is blown more forcefully or the airflow modification plate is brought closer to the strip material, the strip material that is freely moving inside the pocket alone or along the oak bass. is agitated by the turbulence, causing bulges, wrinkles, and swelling of the strip material.

(Technical Problem) Therefore, the present invention almost completely confines the heat radiation flow from at least the exposed portion of the outer circumferential surface of the outer surface of the heating cylinder to the outside air, and the heat from the heat source inside the heating cylinder is absorbed by the band material wrapped around the outer circumferential surface. By distributing heat from the heat source inside the heating cylinder in a concentrated manner, the heat from the heat source inside the heating cylinder can be effectively used without heat radiation loss, and it can be easily installed into existing drying equipment, and the large amount of heat generated when the strip material breaks can be effectively utilized. The main object is to provide an inexpensive and simply constructed strip drying device capable of securing a pocket space with sufficient space for storing leftover material. In addition, it is an object of the present invention to provide a strip drying device with extremely low heat dissipation loss, which can eliminate blurring caused by thermal turbulence and instability of free migration of the strip material in the tray, and increase the drying capacity per heating cylinder. Furthermore, it is possible to fine-tune non-uniformity of the moisture profile with high precision without reducing the drying capacity of each heating tube, allowing the wet strip to be heated and dried while always maintaining a uniform moisture profile for each heating tube. A secondary objective is to provide a strip drying device that can dry the strip material.

(Means for Solving the Problems) According to the first invention, the wet strip material is sequentially wound and transferred around the heating tubes each mounted on a shaft on the machine frame, and the strip material is heated and dehumidified. In a strip drying device for repeated drying processing, an arc-shaped insulating lid having a width exceeding the width of the strip, which is close to the exposed portion of the outer peripheral surface of the heating cylinder and extends as much as possible in the circumferential direction, and the heating At least the former of an annular heat insulating cover that is close to the mirror plate surface f of the cylinder and covers the entire surface thereof is provided, the respective heat insulating covers are connected to each other, and the connected heat insulating cover is mounted on the machine frame via a support member. A sealing member that partitions a gap between the heating cylinder and the connecting heat-insulating lid over at least one of at least an edge portion of the connecting heat-insulating lid and a portion of the heating cylinder adjacent thereto; A strip drying device is provided which is provided with at least one sealed heat insulating chamber formed in the gap.

(Function) In the drying device of the first aspect of the present invention, a heat insulating chamber is formed in the gap between the heat insulating lid that covers at least the exposed outer circumferential portion of the outer surface of the heating cylinder to the maximum extent possible, and the exposed outer circumferential portion, etc. Since the heat insulating chamber is sealed with a sealing member and insulated from the outside air, there is almost no heat radiation from the exposed portion of the outer peripheral surface to the outside air.

In addition, even if the heating tube rotates at high speed, the heat radiation is trapped in the heat insulating chamber and raises the temperature inside the heat insulating chamber, so the temperature of the outer circumferential surface of the heating tube where the band material is hooked can be increased and the heating tube can be dried. ability can be increased. In addition, conventionally, a hot air layer that is formed along the exposed outer peripheral surface of a heating cylinder that rotates at high speed,
From the strip separation position of the exposed portion of the outer circumferential surface, the strip winding moves along the outer circumferential surface while spreading toward the starting position, collides with the strip, creates turbulence, and spreads, so that the pocket is closed. The laminar flow of hot air that flutters the inner free-migration strip part, or flows as the exposed outer circumferential surface and mirror plate surface moves, causes the strip material to wrap around the material and the outer circumferential surface. The band material may be pushed irregularly into the material, causing uneven drying or swelling, or the thermal turbulence that diffuses outward in the radial direction caused by the high-speed rotation of the mirror plate surface may cause the material to dry at both ends in the width direction. Part C and below is referred to as the ear part. ), which agitates the ear and causes wrinkles, etc. However, in the device of the present invention, the hot air layer and thermal turbulence are confined within the heat insulating chamber, so at least the hot air layer causes wrinkles. Inconveniences such as flapping of the band material do not occur. Furthermore, conventionally, the outer circumferential surface of the wet band wrapper absorbs heat and then radiates heat to the hot air layer, which lowers the temperature. The temperature can be maintained high and the drying ability of the heating cylinder can be improved.

(Hereinafter, blank space) According to the second invention, the wet strip material is sequentially wound around the heating tubes mounted on the machine frame and transferred, and the strip material is repeatedly heated and dehumidified to dry it. In the strip material drying device for the purpose of the present invention, an arcuate heat insulating lid having a width exceeding the width of the strip material, which is close to the exposed outer peripheral surface of the heating tube and extends as much as possible in the circumferential direction; On the other hand, at least the former of annular heat insulating lids that cover the entire surface thereof are provided in close proximity to each other, and the respective heat insulating lids are connected to each other, and the connected heat insulating lids are mounted on the canopy/frame via a support member, and the connected heat insulating lids are connected to each other. A sealing member is provided to partition a gap between the heating tube and the connected heat insulating lid over at least one of the end edge portion of the heating tube and a portion of the heating tube adjacent to the end edge portion thereof, and a sealing member is provided in the gap. At least one sealed heat insulating chamber is formed, and a heater consisting of one or more variable output heaters for heating at least a part of the exposed outer peripheral surface of the heating cylinder in the axial direction is housed within the heat insulating chamber. A strip drying device is provided.

(Function) The device of the second invention has the same effect as the device of the first invention, but in addition, in the drying device of the second invention, at least a part of the exposed outer peripheral surface inside the heat insulating chamber is axially extended. A heater consisting of one or more units with a variable output for heating is provided, and the exposed portion of the outer peripheral surface, which has cooled due to heat absorption by wrapping the wet band, is heated to a desired temperature by the heater to raise the temperature. Therefore, the drying capacity of the drying device can be increased without adding a heating cylinder. Furthermore, since the highly heat-absorbing metal outer periphery is directly heated and the heat output is variable, the same drying equipment can be used to heat and dry various strip materials with different moisture content and basis weight. be. In other words, conventionally, the temperature of the outer circumferential surface where the high-moisture-containing strip is engaged is particularly low, and while the heat from the heat source inside the heating cylinder is not sufficiently transmitted to the outer circumferential surface, the strip is able to absorb the temperature drop. Since it was engaged with the outer circumferential surface, the strip material could not be sufficiently heated and dried. It has been found that this heat transfer delay phenomenon at the outer periphery of the heating cylinder becomes more serious as the moisture content of the strip increases and/or as the rotational speed of the heating cylinder increases.

While the first invention passively attempts to eliminate this heat transfer delay phenomenon, the second invention attempts to eliminate this phenomenon more actively.

Further, in the second invention device, a large number of variable output heaters for heating at least a portion of the exposed outer peripheral surface of the heat insulating chamber in the axial direction can be arranged in parallel in the axial direction. be. Therefore, moisture generated in the pre-treatment process such as uneven basis weight in the width direction that occurs in the band forming process, uneven amount of liquid removed in the width direction that occurs in the pressing and deliquoring process, etc., and dryness G- in the width direction that occurs in the heat drying process Non-uniformities in the profile can be adjusted at any time and at any time using the heating cylinder. In this case, the more heaters are arranged in parallel in the axial direction, the more
The heating bandwidth in the width direction can be narrowed, allowing fine adjustment. Further, the longer each heater is extended in the circumferential direction, the higher the maximum heating amount limit value becomes, and the more each heater is arranged in parallel in the circumferential direction, the more finely the heating amount can be adjusted. In this way, the variable output heater corresponding to the strip section with high moisture content is strongly radiated, or the number of constant output heaters corresponding to the strip section is increased, and/or the heat dissipation is increased. The heat output of a variable output heater corresponding to a portion of the strip with moisture content is weakened, or the number of constant output heaters radiating heat corresponding to the portion of the strip is reduced. In this way, the temperature of the non-exposed outer circumferential surface increases when the strip material with a high moisture content is engaged, and the amount of heat stored in the outer circumference increases, whereas the strip material with a relatively low moisture content As the temperature of the exposed outer periphery where the sections interlock decreases, the amount of heat stored in the outer periphery decreases, resulting in a higher moisture content strip compared to a lower moisture content strip section. The amount of heat transferred to the material portion increases relatively when the strip material is engaged, and the non-uniformity of the moisture content and file value is eliminated. Most of the energy released from the heater is absorbed by the thick metal outer periphery, which has a large heat capacity and good heat absorption, and the absorbed heat is almost completely sealed in the heat insulating chamber and the heat insulating lid. Almost no heat is radiated outside the insulated room. Even if the exposed portion of the outer peripheral surface that has absorbed heat comes into contact with the outside air for a short time, no change in temperature of the exposed portion of the outer peripheral surface is observed.

As a heater, even if its heat output is high, the thick outer peripheral portion will not be damaged. Therefore, there is no problem even if the heat is not radiated over the entire exposed portion of the outer peripheral surface. The output of the heater can be adjusted by arranging a plurality of constant output heaters in parallel in the axial direction and/or circumferential direction, and individually operating each of the ship heaters in two positions in the axial direction and/or circumferential direction. The output of the heater can be changed stepwise in the circumferential direction, or the output of the heater can be changed in the axial direction and/or the circumferential direction, or one or more heaters each having a variable output can be connected in the axial direction and/or the circumferential direction.
Alternatively, it may be adjusted continuously in the circumferential direction. The heating system consists of a finned heat dissipation container with internal steam supply, a heat radiating ceramic plate that houses internal heating wires, a heat radiating ceramic plate that can itself conduct electricity, and a heat radiating ceramic plate that is heated by a surface combustion burner. Various known formats can be used.

The heat insulating lid used in each of the drying apparatuses of the present invention No. 1.2 includes an insulating wall material with internal glass wool stuffing;
Arc-shaped and annular heat-insulating lids made of heat-resistant heat-insulating wall materials of various well-known configurations, such as lightweight Cerasannox heat-insulating wall materials and internal vacuum chamber-forming heat-insulating wall materials, can be used.

The sealing member is formed with a cutting edge that slides in line contact with the exposed portion of the smooth outer circumferential surface of the heating cylinder in the axial direction, and is rotatable so that the cutting edge is always in pressure contact with the outer circumferential surface. A sealing member that has a supported and biased scraper and is preferably provided at the circumferential end of the heat insulating lid, and has a plurality of fins that are close to each other and extend parallel to each other in the circumferential direction. , each of which has fins protruding from at least the axial end of the heating cylinder, whose tip portions are inserted into narrow circumferential grooves formed between the fins and which extend in the circumferential direction, respectively protrudes from the heat insulating lid; A ubiquitous sealing member particularly suitable for sealing the axial end of a gap, the tips of which are brought into close or sliding contact with the exposed portion of the smooth outer circumferential surface of the heating cylinder, so that they are close to each other in the axial and/or circumferential direction. A labyrinth sealing member consisting of a large number of fins extending parallel to each other and protruding from a heat insulating lid, and an outer peripheral surface covered with a heat-resistant and abrasion-resistant fiber reinforced material containing fluorine-based resin, synthetic rubber, etc. The heat insulating lid is rotatably supported and biased so as to be in line contact with the exposed portion of the smooth outer peripheral surface of the heating cylinder in the axial direction, and to be in pressure contact with the heating cylinder. O- is preferably provided at the circumferential end.
It is preferable to use a bag sealing member, which is provided on the heat insulating lid and whose tip part is in sliding contact with the smooth exposed portion of the outer circumferential surface of the heating tube and has an arcuate or annular shape in the axial and/or circumferential direction. However, various other sealing members are widely known. Furthermore, in the device of the present invention equipped with arc-shaped and annular heat-insulating covers, each heat-insulating cover is separately fixed to the machine frame via a support member by releasable fixing means such as bolting. It is preferable that the heat insulating lids are connected to each other by releasable communication means. This is because, during maintenance inspections, etc., it is better to release the fixing means and/or the connecting means so that at least only the arc-shaped heat insulating cover can be moved in a substantially horizontal direction so that it can be inserted and removed. preferable. Regarding the single heating cylinder frame, support member, etc. of the first and second invention devices, for example, various heating methods are known for the heating cylinder, such as internal steam heating and internal flame heating. The same applies to the machine frame and the support members, so a description of the known components of the apparatus of the present invention will be omitted.

(Example) An example of the strip material drying apparatus according to the first invention is shown in FIG.
As shown in the lower part in the schematic side view and in the cross-sectional view taken along the line A-A, the wet paper strip P is conveyed in a vertical zigzag pattern to the lower row heating cylinder 1 which is mounted on the machine frame 4 via an endless canvas conveyance belt C. In the upper and lower two-stage multi-tube drying device for drying the paper material p by sequentially winding it around and transferring it to the paper material p and repeatedly heating and dehumidifying the paper material p, An arc-shaped heat insulating cover 2 having a width exceeding the width of the paper material extending in the circumferential direction to the maximum extent possible is provided adjacent to the heat insulating cover 2, and each heat insulating cover 2 is mounted on the machine frame 4 via a support member 40. The gap d between the heating cylinder 1 and the heat insulating lid 2 extends between both circumferential end edge portions 20, 20' and axial both end edge portions 22, 22' of the heating cylinder 1 and the portions of the heating cylinder 1 that are adjacent thereto. Separating sealing members 5 are respectively provided to form one sealed heat insulating chamber 6 in the gap d.

The heat insulating lid 2 has an arc-shaped gutter-like frame 240 formed by molding a thin metal plate (or a thin plate made of heat-resistant reinforced plastic), and a closed-cell hollow pore made of a heat-resistant polymer material. It is formed by fitting circular arc-shaped heat insulating plates 24 and 24 into each other. The heat insulating lid 2 is a tubular support member whose tips are screwed onto nuts welded to both end portions of the trough frame 240 in the axial direction, and whose other ends are screwed onto nuts welded to the machine frame 4. It is removably fixed to the machine frame 4 via 40. At both axial end edge portions 22 and 221 of the heat insulating lid 2, fin members 5 are provided which extend parallel to each other in the circumferential direction and close to each other.
00, and narrow circumferential grooves 120 extending in the circumferential direction are respectively carved on both end surface portions of the outer circumferential surface 10 of the lower row heating cylinder 1, which protrude from the portions 22 and 221, respectively. Each fin member 500 is inserted into the corresponding circumferential groove 120 to form the labyrinth sealing member portion 5.
0 is formed, and both axial end edge portions of the gap d are sealed.

The fin member 500 is made of a self-lubricating, heat-resistant fluorine-based resin material.

Further, when viewed in a schematic side view, a cutting edge is formed that slides in line contact with the left upper exposed outer circumferential surface portion 100 of the outer circumferential surface 10 of the lower row heating cylinder 1 in the axial direction, and the cutting edge is constantly in contact with the outer circumferential exposed portion 100. A pneumatically actuated bell (not shown) is rotatably supported by the machine frame 4 so as to be in pressure contact with the machine frame 4.
A sealing member 52 that also serves as a scraper for cleaning the outer circumferential surface 10 is provided, which has a blade member 522 detachably attached to a support member 520 biased by the support member 520 . , indicated by the arrow a), the gap d between the circumferential edge portion of the heat insulating lid 2 on the opposite side and the exposed outer circumferential surface portion 100 of the heating cylinder 1 is made of a heat-resistant material that can be slightly expanded and contracted in the circumferential direction. The blade member 522 is sealed via a flammable sealing member portion 524 molded from a synthetic rubber material to prevent the blade member 522 from being released due to minute deviations. At both axial end edge portions (not shown) of the burnable sealing member portion 524, fin portions (I, not shown) whose tips are inserted into the circumferential groove 120 of the heating cylinder 1 are formed and protruded. Both circumferential end portions of the fin portion are in close contact with the blade member 522 and the circumferential end edge portions of the fin member SOO of the heat insulating lid 2, respectively.

Furthermore, as seen in the schematic side view of FIG. 1, the tips are brought close to each other in the axial direction by approaching or sliding in contact with the upper right outer peripheral surface exposed portion 100 of the outer peripheral surface 10 of the lower row heating cylinder 1 in the axial direction. A large number of heat-resistant, wear-resistant, and self-lubricating fin members 540 made of a fluorine-based resin material extend in parallel across the
The circumferential edge portions of the gap d are sealed by the labyrinth sealing member portions 54 that are protruded from the circumferential edge portions of the heat insulating lid 2 in the rotation direction (indicated by arrow a in FIG. 1). ing. Note that the fin member 500 of the labyrinth sealing member 50
and the fin member 540 of the labyrinth sealing member 54 are closely connected to each other at each side end portion.

As described above, the gap d is almost completely sealed by the sealing member 5 consisting of the labyrinth sealing member portions 50, 54 and the scraper-cum-sealing member portion 52 that are continuous over the periphery of the gap d, resulting in an arc-shaped heat insulating chamber. 6 is formed.

(Example) An example of the strip drying device according to the second invention is shown in FIG.
As shown in the upper part in the schematic side view and in the sectional view taken along the line B-B, the wet paper strip P is pressed up and down by the endless Kasibus conveyance belt C against the upper row heating cylinders 3 which are mounted on the machine frame 4, respectively. While rolling the paper in a staggered manner and transferring it, the paper material p
Top and bottom 2 for drying by repeating heating and dehumidification
In the multi-stage drying device, the outer peripheral surface 5 of each upper row heating cylinder 5
0 is close to the exposed portion 500 and extends in the circumferential direction to the maximum extent possible, with the arc-shaped heat insulating lid 2 having a width exceeding the width of the strip material, and close to the mirror plate surface 32 of each upper row heating cylinder 5 and covering the entire surface thereof. Each of the heat-insulating lids 2.7 is connected to the machine frame 4 via a support member 40.
20.20' of the heat insulation lid 2 portion of the connected heat insulation lid 2-7, the radially outer peripheral edge portion 70.70' of the heat insulation lid 7 portion, and the radial inner edge portion 70.70' of the heat insulation lid 2 portion of the connected insulation lid 2-7. Peripheral edge portion 7
2.72' and each part of the upper row heating cylinder 5 adjacent thereto, a sealing member 5 is provided for partitioning the gap d between the upper row heating cylinder 3 and the connecting heat insulating lid 2-7, A sealed heat insulating chamber 6 is formed in the gap d, and a plurality of heaters 8 with variable outputs for heating a part of the exposed outer peripheral surface 300 of the upper row heating cylinder 5 in the axial direction are installed in the heat insulating chamber. It is made up of 6 thighs.

The heat insulating lid 2.7 has a heat-resistant arc-shaped gutter-like frame 240 and an annular gutter-like frame 740 formed by molding a thin metal plate (or a thin plate made of heat-resistant reinforced plastic), respectively. A closed-cell porous arc-shaped heat insulating board 24 and an annular heat insulating board 74 made of ceramic material are fitted and fixed by ports 42 and 76. This connected insulation lid 2-
7 has one end screwed to the port 76 of the annular trough-like frame 740, and the other end screwed to a nut welded to the machine frame 4, respectively, through rod-shaped support members 4°. It is removably fixedly mounted on the machine frame 4.

A shallow and narrow annular circumferential groove 520 is carved in a portion of the mirror plate surface 52 that closely faces the radially outer circumferential end portion 7o of the annular heat insulating cover 7 portion on the left side when viewed from the sectional view taken along the line B-B. Heat-resistant and abrasion-resistant fine bristles 560 made of carbon fiber whose bristles are in sliding contact over the annular circumferential groove 520 are densely planted over the radially outer circumferential end portion of the annular gutter-like frame 740. The gap d is sealed by the provided brush top member portion 56, and the annular heat insulating lid 7 is closed.
One end is fitted into and fixed to the radially inner circumferential edge portion 72 of the machine frame 4, and the other end is connected to the machine frame 4 through the shaft box 440 of the bearing 44.
Due to the tubular sealing and supporting member part that is tightly fixed to the
In the portion of the mirror plate surface 52 that closes the gap d'z and closely faces the radially outer circumferential end portion 70' of the right annular heat insulating lid 7 as viewed in the sectional view taken along the line B-B, A narrow circumferential groove 320 extending in parallel is cut in the groove, and the tip thereof is connected to the circumferential groove 52.
The lapirisis sealing member portion 54 is formed by a fin member 540 made of a heat-resistant fluorine-based resin material inserted into the fin member 540 extending in the circumferential direction of the gutter-like frame 740 of the annular heat-insulating lid 7 and protruding from each other. A bearing sealing/supporting member portion 5 is provided to seal the gap d and is fitted between the radially inner circumferential edge portion 72′ of the annular heat insulating lid 7 and the end plate shaft neck portion of the upper row heating cylinder 5.
9, the gap d is sealed, and the lower left outer circumferential surface exposed portion 50 of the outer circumferential surface 50 of the upper row heating cylinder 3 as seen in the schematic side view.
A cutting edge is formed that slides in line contact in the axial direction with respect to the blade, and is always in pressure contact with the exposed portion 300. It is rotatably supported by the machine frame 4 and is operated by a pneumatic bellows (not shown). ) The outer circumferential surface 3 includes a blade member 522 removably attached to a support member 520 biased by
The sealing member portion 52 that also serves as a scraper for cleaning connects the circumferential edge portion 20 of the heat insulating lid 2 on the side opposite to the rotational direction of the upper row heating cylinder 3 (indicated by arrow a in FIG. 1). The gap d between the outer peripheral surface exposed portion 500 of the row heating cylinder 5 is
The blade member 522 is connected to the blade member 522 via a flexible sealing member portion 524 made of a heat-resistant and abrasion-resistant synthetic rubber material that can be slightly expanded and contracted in the circumferential direction.
The sealing state is prevented from being completely released due to minute deviation of 50°, and both axial end edge portions (not shown) of the flexible sealing member portion 524 are the radially outer circumferential edge of the annular heat insulating lid 7. The blade member 522 is in close contact with the blade member 522, and both circumferential edge portions are in close contact with the blade member 522.
and the circumferential edge portion 20 of the arc-shaped heat insulating lid 2.

In FIG. 1, the outer circumferential surface 30 of the upper row heating cylinder 5 is seen in a schematic side view.
An O-ru sealing member portion 57 whose outer periphery is coated with a heat-resistant and abrasion-resistant synthetic rubber material that is in line contact with the right upper outer circumferential exposed portion 5ooK of the outer circumferential surface of the right side upper outer circumferential surface exposed portion 5ooK of As a result, the gap d between the circumferential edge portion 201 of the arc-shaped heat insulating lid 2 and the exposed outer peripheral surface portion 500 of the upper row heating cylinder 3 adjacent thereto is sealed, and one sealed heat insulating chamber 6 is formed in the gap d. form.

In FIG. 1, a heat insulating chamber 6 formed on the upper row heating cylinder 5 on the right side as seen from the schematic side view has an outer periphery of the upper row heating cylinder 3, as shown in the sectional view taken along the line B-B. A heat dissipation surface for heating in the axial direction is formed on the surface exposed portion 500 fC, and the heat radiating surface with the internal heating wire installed inside the 1B x 1 piece with a variable output extending in the width direction and circumferential direction is used to heat the bow. E1 Tsu'kusu board 80
A heater consisting of a heater 8 is embedded in the arc-shaped insulating lid 2,
The heating wires of each plate body 80 are connected to a power source 84 via a variable resistor 82, so that the heat output can be changed continuously in the axial direction. Also, looking at the schematic side view,
A heat dissipation surface for heating the outer peripheral surface exposed portion 500 of the upper row heating tube 5 in the axial direction is formed in the heat insulation chamber 6 formed on the left upper row heating tube 5. A heater made of a heat ray emitting ceramic plate body 80 extending and divided into five parts in the circumferential direction and having a heating wire inner section is embedded in the arc-shaped heat insulating lid 2, and each heating wire portion of the plate body 80 of the heater 8 is Each of them is connected to a filter-phase AC power source 84 via a switch box 86, and the heat output can be changed in five steps in the circumferential direction. By loosening the connecting bolts 42 and the like, the arcuate heat insulating lid 2 can be taken in and out in the horizontal direction shown by the arrow f in the cross-sectional view taken along the line B-B.

(Hereinafter referred to as a margin.) (Effects) The strip drying device according to the present invention insulates the heat radiation flow from at least the exposed outer circumferential surface of the heating tube to the outside air by almost completely sealing it in the heat insulating chamber with the heat insulating lid. Since the temperature inside the heat insulating chamber can be maintained at approximately the temperature of the outer circumferential surface or higher and the heat radiation flow can be concentratedly directed to the outer circumferential surface wrapping material portion, the drying processing capacity of the apparatus can be significantly increased. Various strip materials with different heat capacities per unit area can be dried.

In addition, the insulation lid remains stationary regardless of the high-speed rotation of the heating cylinder, so even if it is low-density and lightweight with a thickness of about 20% to 50%, it still has a sufficient insulation effect. It is not only easy to remove, inexpensive, and extremely easy to remove, but also extremely easy to apply to existing equipment. Therefore,
Since a pocket space large enough to accommodate a large amount of leftover material generated when the strip material is broken can be secured, there are no problems with its operability or workability such as maintenance and inspection. Furthermore, since the occurrence of thermal turbulence caused by the high-speed movement of the exposed portion of the outer circumferential surface of the heating cylinder is almost completely prevented, the unstable transition phenomenon of the free transition zone material portion in the pocket caused by the thermal turbulence is eliminated. This eliminates the occurrence of strip breakage and intestinal irritation, allowing high-quality products to be manufactured at high speed. In addition, the non-uniformity of the liquid content in the width direction and/or longitudinal direction of the wet band material can be finely tuned with high precision without reducing the drying capacity per heating cylinder or while actively increasing the drying capacity. Since it can be adjusted, it is possible to produce good quality products with a uniform moisture profile.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view including a partial sectional view, showing both an embodiment of a strip drying device according to the first and second inventions. [Explanation of symbols] 1 . . . Lower row heating cylinder 10
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
Outer circumference 20.20' ・ ・ ・ ・ ・
・ ・ ・Both circumferential edge portions 22.20'
・ ・ ・ ・ ・ ・ ・ ・ Both end edge portions in the axial direction 5 ・・・・・・・・・・・ Upper row heating cylinder 50
......Outer peripheral surface 500...
・・Exposed part 32 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
Mirror plate surface 4 ...... Machine frame 40 ...... Expenditure parts 5 ・
...... Sealing member 6 ......
・・・・・・・・・Insulation room 7 ・ ・ ・ ・ ・
・ ・ ・ ・ ・ ・ ・ ・ ・ Annular insulation lid 8 ・・・・・・・・・・・・・・・ Heater d ・・・
・・・・・・・・・・・・Gap p ・ ・ ・ ・
・・・ ・ ・ ・ ・ Wet strip paper material cleaning R drawing (no change in content) Figure 1 b-Jiga 1 Amendment to prison procedure (voluntary) November 21, 1985 Patent Office Director Kuro 1) Mr. Akihiro t Indication of the case Patent Application No. 251582 of 1988 3, Person making the amendment 5, Description and drawings to be amended 6 Contents of the amendment

Claims (1)

[Claims] 1. Drying of the wet strip material by sequentially winding and transferring the wet strip material around heating tubes each mounted on a shaft on a machine frame, and drying the strip material by repeatedly heating and dehumidifying the strip material. In the apparatus, an arc-shaped heat insulating lid having a width exceeding the width of the band material and extending as far as possible in the circumferential direction and close to the exposed outer peripheral surface of the heating cylinder; At least the former of annular heat insulating lids covering the entire surface are provided, the respective heat insulating lids are connected to each other, and the connected heat insulating lids are mounted on the machine frame via a support member, and at least the edge portions of the connected heat insulating lids are connected to each other. A sealing member is provided for partitioning a gap between the heating tube and the connected heat insulation lid over any one or more of the parts of the heating tube adjacent to the heating tube, and at least one sealed heat insulation member is provided in the gap. A strip drying device characterized by forming a chamber. 2. In a strip material drying device for sequentially winding and transferring a wet strip material around heating tubes each mounted on a shaft on a machine frame, and drying the strip material by repeatedly heating and dehumidifying the strip material, the heating tube an arc-shaped heat insulating lid with a width exceeding the width of the strip material, which is close to the exposed outer peripheral surface of the heating cylinder and which extends as far as possible in the circumferential direction; At least the former lid is provided, and the respective heat insulating lids are connected to each other, and the connected heat insulating lid is mounted on the machine frame via a support member, and at least the edge portions of the connected heat insulating lid and the heating adjacent thereto are provided. A sealing member that partitions a gap between the heating cylinder and the connected heat insulating lid is provided over one or more of the cylindrical parts to form at least one sealed heat insulating chamber in the gap, and the heating A strip material drying device characterized in that a heater consisting of one or more variable output heaters for heating at least a portion of the exposed portion of the outer peripheral surface of the cylinder in the axial direction is installed inside the heat insulating chamber.