JPS6142958Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of cooling a heated sheet-like material running in contact with its external surface to a desired temperature by circulating a cooling or heating liquid inside the material, or relates to a new cylinder for heating a low-temperature sheet material to a desired temperature.

In this cylinder for cooling or heating a sheet-like material, a liquid such as water or oil for cooling or heating is supplied into the cylinder, and the external surface of the cylinder is cooled or heated by this liquid. A sheet-like material such as a cylinder is brought into contact with this external surface, the cylinder is rotated to run the sheet-like material, and the sheet-like material is sequentially cooled or heated on the external surface. Therefore, in such cylinders, it is very important that the heat transfer of the liquid to the external surface that cools or heats the sheet material is carried out well, and the amount of liquid used is also limited from other economical viewpoints. It is required that the amount of power required is small and the required power is small.

However, most conventional cylinders simply supply liquid into a hollow cylindrical cylinder and rotate the cylinder to sequentially cool or heat the sheet-like material. However, due to the viscosity of the liquid, the liquid rotates at approximately the same speed as the cylinder, creating a thin boundary layer of liquid on the inner surface of the cylinder, which significantly reduces heat transfer. There have also been attempts to make the cylinder into a double cylinder so that the liquid flows in the space close to the outer cylinder, but the liquid inside the cylinder that rotates as the sheet-like object travels flows inside the cylinder as in the above case. The nearby parts are viscous and rotate at the same speed as the cylinder, so the formation of the boundary layer described above and a reduction in heat transfer are unavoidable, and even if the liquid is forced to flow with a pump, the amount of liquid used and power will be large and it will be difficult. It's the economy. A structure in which a propeller is built into the cylinder to stir the liquid has also been attempted, but the low or high temperature liquid supplied mixes with the liquid inside the cylinder, and the desired heat transfer cannot be achieved unless the amount of liquid supplied is large. It was uneconomical.

The present invention provides a cylinder that eliminates the above-mentioned conventional drawbacks, and will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view taken in the longitudinal direction of a cylinder according to the present invention, and FIG. 2 is a cross-sectional view taken in the same circular direction. In these figures, 1 is a hollow shaft, 2 is a cylindrical hollow jacket, and this hollow jacket 2 is attached to the outer periphery of the hollow shaft 1 so that the hollow shaft 1 is located on the central axis in the longitudinal direction. There is. Reference numeral 3 denotes a cylindrical outer cylinder that cools or heats the sheet-like material 22 by bringing the sheet-like material 22 into contact with its outer peripheral surface. It is rotatably provided on the outer peripheral side of the hollow shaft 1.

In this embodiment, a hollow shaft 1 to which a hollow jacket 2 is attached is supported at both ends by shaft supports 7 and 8, as shown in FIG. The outer cylinder 3 has projecting tubes projecting outward in the axial direction from side plates 18 and 19 on both sides thereof, and are rotatably supported by bearing parts 20 and 21 provided inside the shaft supports 7 and 8. A packing 4 is interposed between the protruding tube and the hollow shaft 1 which is inserted through the interior of the protruding tube.
Here, the packing 4 interposed between the protruding tube of the outer cylinder 3 and the hollow shaft 1 has an outer peripheral surface that contacts the inner periphery of the protruding tube and is a smooth surface with a ball bearing installed therein, for example. , the outer cylinder 3 is rotatable with respect to the hollow shaft 1. In addition, the shaft supports 7 and 8 that support both ends of the hollow shaft 1 are fixed so that the hollow shaft 1 does not rotate and only the outer cylinder 3 rotates, as well as those that allow the hollow shaft 1 to rotate freely. It may be of a rotary type that is supported by the outer cylinder 3 and rotated relative to the outer cylinder 3 by an appropriate driving means.

As described above, the hollow shaft 1 with both ends supported is provided with an opening 10 on the side of the liquid supply port 9 at one end for guiding the cooling or heating liquid supplied from the supply port 9 into the outer cylinder 3. and the outlet 11 at the other end.
An opening 12 is provided on the side to lead out the liquid in the outer cylinder 3 after the heat transfer process to the discharge port 11, and between these openings 10 and 11 is a partition plate 13 that closes off the inside of the hollow shaft 1. The liquid supplied from the supply port 9 and the treated liquid are prevented from mixing.

Reference numeral 5 denotes axial flow vanes arranged circumferentially on the inner circumferential surface of the outer cylinder 3. These axial flow vanes 5 protrude radially inward from the inner circumferential surface, and, as shown in FIG. It rotates together with the outer cylinder 3 and functions to send the liquid behind the axial flow vane 5 forward. Here, the axial flow vanes 5 shown in FIG. 1 are provided so as to rotate with the rotation of the outer cylinder 3 and function to send out the liquid present in the gap 17 between the outer cylinder 3 and the hollow jacket 2. , as in the modified example shown in FIG. 3, when the inclination of the axial flow vane 5 with respect to the axial direction is reversed and rotates with the rotation of the outer cylinder 3, liquid enters the gap 17 between the outer cylinder 3 and the hollow jacket 2. It is also possible to have it sent.

Reference numeral 6 denotes a doctor blade that projects outward along the longitudinal direction from the outer peripheral surface of the hollow jacket 2, and the protruding end of the doctor blade 6 is provided close to the inner peripheral surface of the outer cylinder 3. In addition, when the doctor 6 is attached elastically, it is also possible to provide the doctor 6 so that the protruding end thereof comes into contact with the inner circumferential surface of the outer cylinder 3. The doctor 6 provided in this manner is maintained at a fixed position when the outer cylinder 3 rotates, or rotates together with the hollow shaft 1 relative to the outer cylinder 3, and is moved near the inner circumferential surface of the outer cylinder 3. This prevents the liquid from rotating together with the outer cylinder 3.

Reference numeral 15 designates an inlet for introducing the liquid in the outer cylinder 3 into the hollow interior 14 of the hollow jacket 2, and reference numeral 16 represents an outlet for introducing the liquid introduced into the hollow interior 14 into the outer cylinder 3. Liquid is adapted to circulate inside the outer cylinder 3.

Next, the case where the sheet-like material 22 is cooled or heated using the cylinder shown in FIGS. 1 and 2 will be described. When cooling or heating the sheet-like material 22, as shown in FIG. Cooling or heating liquid is supplied into the outer cylinder 3 from the port 9 through the opening 10, and the sheet-like material 22 is run to rotate the outer cylinder 3. The liquid supplied into the outer cylinder 3 passes through the hollow interior 14 of the hollow jacket 2 as shown by the arrow in FIG. 1, circulates within the outer cylinder 2 several times, and is finally exhausted through the opening 12. It is discharged from the outlet 11. Here, the sheet-like material 22
The liquid in the gap 17 between the outer cylinder 3 and the hollow jacket 2, which directly transfers heat to the outer peripheral surface of the outer cylinder 3 for cooling or heating, is moved by the axial flow vanes 5 rotating together with the outer cylinder 3. New liquid is forced into this gap 17 and heat transfer takes place with the new liquid. Therefore, this is efficiently carried out by heat conduction to the outer circumferential surface of the outer cylinder 3, and when the traveling speed of the sheet-like material 22 increases and the rotational speed of the outer cylinder 3 increases, the liquid in the gap 17 due to the axial flow vanes 5 is This also speeds up the circulation of heat and makes heat transfer more efficient.

Further, the liquid in the gap between the outer cylinder 3 and the hollow jacket 2 is moved inside the outer cylinder 3 by a doctor 6 that is maintained at a constant position with respect to the rotation of the outer cylinder 3 or rotated relative to this. The outer cylinder 3 near the circumferential surface
This prevents it from rotating as it rotates.

Incidentally, in the modification shown in FIG. 3, the outer cylinder 3
Although the circulation process of the liquid circulating therein is different, the actions of the axial flow vanes 5 and the doctor 6 are the same.

As detailed above, the cylinder for cooling or heating a sheet-like material according to this invention has a doctor protruding outward along the longitudinal direction on the outer peripheral surface of a hollow jacket attached to the outer periphery of a hollow shaft. Since the tip of the protruding side of the doctor blade is close to the inner peripheral surface of the outer cylinder which is rotatably provided with respect to the hollow shaft, the sheet-like object is moved in contact with the outer peripheral surface of the outer cylinder and the outer cylinder is moved. When rotated, this doctor prevents the liquid near the inner circumferential surface of the outer cylinder from rotating as the outer cylinder rotates, and a boundary layer of liquid is formed on the inner circumferential surface of the outer cylinder. As a result, heat transfer by the liquid to the outer circumferential surface of the outer cylinder is performed very efficiently, and sheet-like objects can be cooled or heated much more effectively than in conventional cylinders. .

Furthermore, in the cylinder according to this invention,
A required number of axial flow vanes protruding radially inward on the inner circumferential surface of the outer cylinder are arranged circumferentially and slightly inclined in the axial direction, so that these axial flow vanes rotate together with the outer cylinder. Because of this, when the outer cylinder rotates as the sheet material travels, these axial flow vanes rotate accordingly, forcing the liquid between the outer cylinder and the hollow jacket to circulate. be. As a result, new liquid is sequentially supplied between the outer cylinder and the hollow jacket, and heat transfer to the sheet-like object is efficiently performed. moreover,
The rotational speed of these axial flow vanes changes depending on the traveling speed of the sheet-like object, and the circulation speed of the liquid is changed, so that appropriate heat transfer can be performed according to the traveling speed of the sheet-like object.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a cylinder showing an example of the present invention, Fig. 2 is a sectional view in the same circular direction, and Fig. 3 is a sectional view in the same circular direction.
The figure is a longitudinal cross-sectional view of a cylinder showing another example of the present invention, and Fig. 4 is an enlarged partially cutaway view showing the state of the axial flow vanes provided on the inner peripheral surface of the outer cylinder used in the present invention. FIG. 1...Hollow shaft, 2...Hollow jacket, 3...
Outer cylinder, 5... Axial flow impeller, 6... Doctor, 9...
Supply port, 10... Opening, 11... Discharge port, 12
... opening, 14 ... hollow interior, 15 ... entrance,
16...Exit.

Claims (1)

[Scope of utility model registration request] The hollow jacket 2 is attached to the outer periphery of the hollow shaft 1 so that the hollow shaft 1 is located on the longitudinal center axis of the cylindrical hollow jacket 2, and the outer periphery is attached so as to cover the hollow shaft 1 and the hollow jacket 2. In a cylinder having a cylindrical outer cylinder 3 on the side rotatable with respect to a hollow shaft 1, the hollow shaft 1 has an opening 10 for guiding liquid supplied from a supply port 9 at one end into the outer cylinder 3. and an opening 12 that leads the liquid inside the outer cylinder 3 to the discharge port 11 at the other end of the hollow shaft 1.
Further, the hollow jacket 2 is provided with an inlet 15 that leads the liquid into the hollow interior 14 and an outlet 16 that leads out the liquid, and a doctor 6 is provided on the outer circumferential surface of the jacket 2 extending outwardly along the longitudinal direction. The tip of the protruding side of the doctor 6 is protruded close to the inner circumferential surface of the outer cylinder 3, and a required number of axial flow blades 5 protruding radially inward on the inner circumferential surface of the outer cylinder 3. are arranged along the circumferential direction and slightly inclined in the axial direction, and the tips of these axial flow vanes 5 are connected to the hollow jacket 2.
A cylinder for cooling or heating a sheet-like material, characterized in that the cylinder is located close to the outer peripheral surface of the cylinder.