JP2016070476A - Heat pipe type heat equalizing roll with cooling function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly cool a whole heating roll in a short time, the heating roll including a heat pipe so as to be built in a roll shell and subjected to heat equalization.SOLUTION: A heat pipe 4 assembled into a heat equalizing roll extends outside with respect to the end part of a roll shell 3; a cooling mechanism of a heat radiation fin 5b is provided on its extension part; this portion is directly exposed to low-temperature outside air or low-temperature outside air forcibly contacts with this portion to radiate heat for cooling; and an excellent heat transport effect of the heat pipe 4 is utilized to actively deprive heat from a roll body.SELECTED DRAWING: Figure 5

Description

The present invention relates to a heating roll in which a heat pipe is built in a roll shell so as to equalize the temperature, and a roll in a high temperature state is provided by providing a cooling mechanism on the extension of the heat pipe that protrudes from the end of the roll shell. It is related with cooling in a short time.

It takes time to cool a conventional heat pipe type soaking roll (see FIG. 1) from a high temperature state by natural heat radiation from the roll surface to the atmosphere. Therefore, conventionally, when the roll device is stopped urgently, such as in an emergency, the entire roll is forcibly air-cooled from the outside using a cooling device such as a blower, or a cooling water circuit is provided in the roll to cool the water. It was necessary to shorten the time.

  Patent Publication 2013-142472

Although the conventional forced air cooling method can shorten the cooling time compared with natural heat radiation to the atmosphere, the effect is not sufficient, and there is a problem that the roll temperature is unbalanced due to ventilation and the roll is thermally deformed. Further, the conventional water cooling system has a problem to be solved such that a cooling water facility is separately required and there is a risk of damaging a roll device or a product heat-treated by the roll due to water leakage from the cooling water circuit.

The heat pipe type soaking roll according to claims 1 to 3 of the present invention extends the heat pipe incorporated in the soaking roll from the end of the roll shell as shown in FIGS. A cooling mechanism such as a heat radiating fin is provided on the extension.

According to the present invention, by attaching a heat radiating fin or the like to a heat pipe extended from the end of the roll shell to the outside, or by providing a cooling mechanism such as applying cooling air to the heat radiating fin or the like with a blower, Using the heat transport effect, the entire roll can be cooled in a short time while maintaining a safe and uniform temperature distribution.

It is a figure which shows the conventional heat pipe type | formula soaking roll, The heat pipe 4 is integrated in the axial direction in the roll shell 3, and they are arrange | positioned in the circumferential direction. It is a figure which shows the example of embodiment of this invention, and has cooling mechanisms, such as the radiation fin 5a, on the extension of the heat pipe by the side of the heating source of the conventional heat pipe type soaking roll. It is a figure which shows the example of embodiment of this invention, and has cooling mechanisms, such as the radiation fin 5b, on the extension of the heat pipe by the side of the non-heating source of the conventional heat pipe type | mold soaking roll. It is a figure which shows the example of embodiment of this invention, and has cooling mechanisms, such as the radiation fins 5a and 5b, on the heat pipe extension of both the anti-heating source side and the heating source side of the conventional heat pipe type soaking roll. is there. FIG. 5 is a diagram showing an embodiment of the present invention, in which a wind tunnel 9 is provided instead of the fixed cover 6a or 6b provided on the outside of the radiating fins 5 of FIGS. 2 to 4, and an inlet side damper 8a, an outlet side damper 8b, and the like And a cooling mechanism for forcibly ventilating air into the wind tunnel 9 from one opening by a blower such as the fan 7.

An embodiment of the present invention will be described with reference to FIG. During the normal heating operation, the fixed cover 6b covering the outside of the heat radiating fins 5b is removed at the start of cooling to expose the heat radiating fins 5b to directly contact the outside air. Heat is moved to the radiation fin 5b to cool the roll body. By providing such a cooling mechanism on the heat pipe 4 extending outward from the end of the roll shell 3, the roll body can be cooled uniformly and in a short time.

In the above embodiment, the method of exposing the heat dissipating fins 5b when the roll body is cooled is shown. However, as shown in FIG. 5, the wind tunnel 9 with openings that can be opened and closed by dampers 8a, 8b, etc. is provided outside the heat dissipating fins 5b. The opening is closed during the heating operation, opened at the start of cooling, and low-temperature outside air is forcibly introduced from one opening to the radiating fins 5b in the wind tunnel 9 using a blower such as the fan 7. After cooling, a method of exhausting from the other opening may be used. If it carries out like this, since low temperature external air can always be introduce | transduced into the radiation fin 5b, a roll main body can be cooled further in a short time.

1: Heat source part 2a: Heat source side journal part 2b: Counter heating source side journal part 3: Roll shell 4: Heat pipe 5a: Heat source side radiation fin 5b: Counter heating source side radiation fin 6: Fixed cover 7: Fan 8a: Inlet side damper 8b: Outlet side damper 9: Wind tunnel

Claims (3)

In a heat roll with a built-in heat pipe in the roll shell, the heat pipe is extended from one or both ends of the roll shell to the outside, and a cooling mechanism such as radiating fins is provided on it to increase the heat transport effect of the heat pipe. The heat pipe type heat equalizing roll is characterized in that the heat of the roll body that has become hot during operation can be dissipated by the radiating fins at the end and cooled in a short time. A detachable fixing cover is provided on the outside of the heat radiating fin provided on the heat pipe extension of the heat pipe type soaking roll shown in claim 1 so that low temperature outside air does not directly touch the radiating fin during normal heating operation. Heat pipe type heat equalizing roll, which can cool the roll body in a short time by removing the fixed cover during emergency cooling and exposing the radiating fins to low temperature outside air to dissipate heat A wind tunnel is provided outside the heat dissipating fin provided on the heat pipe extension of the heat pipe type heat equalizing roll shown in claim 1, and an opening that can be opened and closed by a damper or the like is provided in the wind tunnel, and the opening is opened during normal heating operation. Closes the heat sink so that low-temperature outside air does not touch it, opens the opening during emergency cooling, and forcibly cools the heat-radiating fin in the wind tunnel by introducing low-temperature outside air from one opening using a blower such as a fan. The heat pipe type soaking roll is characterized in that the roll body can be cooled in a short time by exhausting from the other opening.

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