JPH0357285Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cooling device for rolling rolls.

[Prior Art] A conventional cooling device for a rolling roll is shown in FIG. 4, where a is a rolling roll and b is a rolling roll a.
The header C, which is arranged parallel to the header B, is a plurality of spray nozzles installed at required intervals in the longitudinal direction of the header B, and the cooling water supplied from the header B to the spray nozzle C is sprayed from the spray nozzle C. As shown in FIG. 5, a partially wrapped spray pattern d is formed on the surface of the rolling roll a.

[Problems to be solved by the invention] However, in the conventional apparatus described above, the spray pattern d is formed with a certain distance between the tip of the spray nozzle c and the rolling roll a, as shown in FIG. Therefore, there is a risk that pattern unevenness may occur due to pressure fluctuations in the cooling water, reducing the cooling effect.Moreover, since high-pressure water is required, there are problems such as large energy loss.

The present invention has been made in view of the above-mentioned circumstances, with the object of providing a cooling device for mill rolls that has a good cooling effect and reduces energy loss.

[Means for Solving the Problems] The present invention includes a guide body of a passing guide that guides the material and introduces it into the rolling roll, and a nozzle slit through which the cooling liquid from the header passes, and a nozzle slit that communicates with the nozzle slit to allow the cooling liquid to flow from the nozzle slit. A slit-shaped nozzle body for spraying cooling liquid onto the rolling rolls and an upper plate capable of adjusting the gap at the opening at the tip of the nozzle body are provided, and by adjusting the gap, the flow rate of the cooling liquid sprayed onto the rolling rolls can be adjusted. and a configuration in which the spraying pattern is changed to effectively cool the rolling roll.

[Function] During rolling, the material is guided by the threading guide and rolled into the rolling roll, and the cooling liquid fed from the nozzle slit in the guide body of the threading guide is applied to the surface of the rolling roll with the optimum amount of cooling liquid from the nozzle body. The rolling rolls are cooled by spraying.

[Example] Hereinafter, an example of the present invention will be described based on the accompanying drawings.

Figures 1 to 3 show an embodiment of the present invention.
2 is a pair of upper and lower work rolls, 3 is a rolling mill housing, 4 is a frame fixed to the rolling mill housing 3, 5 and 6 are lower plate guides attached to the frame 4, and 7 is fixed on the frame 4. A bracket 8 is an upper plate passing guide pivotally attached to the bracket 7 via a pin 9, and 10 is a spring for bringing the tip of the upper plate passing guide 8 into contact with the work roll 1.

The plate passing guide 8 also serves as a cooling device, and the guide body 11 is provided with nozzle slits 12 through which cooling water passes, and a header is provided at the rear of the guide body 11 to distribute the cooling water to the nozzle slits 12. 13 is fixed, and the guide body 11
A slit-shaped nozzle body 14 is fixed in front of the nozzle body 14, and the upper plate of the nozzle body 14 is movable in the direction of the rolling line so as to adjust the nozzle gap G shown in FIG. Also, nozzle body 1
A drainer 17 is attached to the lower plate 16 of 4. Since there is no need to inject cooling water, the distance between the tip of the nozzle body 14 and the work roll 1 is small.

When rolling work is performed using the rolling mill, the material is guided by upper and lower passing guides 8, 6, and 5 from the direction of arrow A, for example, and fed between the work rolls 1 and 2, and rolled. During rolling, the upper plate passing guide 8 also serves as a cooling device, and the cooling water supplied to the header 13 attached to the rear of the guide body 11 of the upper plate passing guide 8 flows from the header 13 to the nozzle slit 12 of the guide body 11. is supplied to the nozzle slit 1
2 through the nozzle body 14 onto the surface of the work roll 1 at low pressure, and the work roll 1 is cooled to a predetermined state. Water adhering to the surface of the work roll 1 is wiped off by a drainer 17.

When changing the flow rate of cooling water sprayed from the nozzle body 14 to the work roll 1, the upper plate 15 is moved toward the rolling line to adjust the nozzle gap G. If the nozzle body 14 is divided into a plurality of parts in the width direction, the adjustment amount of the nozzle gap G can be adjusted to the nozzle body 1.
By changing the position of the rolls 4 in the axial direction, it is possible to obtain an arbitrary cooling pattern.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes may be made without departing from the gist of the present invention.

[Effects of the Invention] According to the rolling roll cooling device of the present invention, various excellent effects as described below can be achieved.

() Since the tip of the nozzle main body has a slit shape and is close to the rolling roll, the cooling water does not interfere with each other and there is no uneven cooling, so that the rolling roll is cooled well.

() Since the cooling water requires low pressure, the pump discharge pressure can be lowered, helping to save energy.

() The flow rate of the cooling liquid sprayed from the nozzle body can be adjusted to any desired flow rate by adjusting the nozzle gap, making it possible to achieve optimal cooling.

() By dividing the nozzle body into a plurality of parts in the width direction, an arbitrary cooling pattern can be obtained by changing the nozzle gap depending on the width direction position of the nozzle body.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of one embodiment of the rolling roll cooling device of the present invention, Fig. 2 is a plan view of the slit portion of Fig. 1, Fig. 3 is a detailed view of the nozzle body portion of Fig. 1, FIG. 4 is an explanatory diagram of a conventional rolling roll cooling device, and FIG. 5 is an explanatory diagram of a cooling pattern by the device of FIG. In the figure, 1 and 2 are work rolls, 5 and 6 are lower board guides, 11 is a guide body, 12 is a nozzle slit,
13 is a header, 14 is a nozzle body, 15 is an upper plate, and G is a nozzle gap.

Claims (1)

[Scope of utility model registration request] The guide body of the threading guide that guides the material and introduces it into the rolling roll has a nozzle slit through which the cooling liquid from the header passes, and a slit-shaped nozzle body that communicates with the nozzle slit and sprays the cooling liquid from the nozzle slit onto the rolling roll. A cooling device for a rolling roll, characterized in that it is provided with an upper plate that can adjust the gap of the opening at the tip of the nozzle body.