RU2237531C1 - Apparatus for feeding cooling agent - Google Patents

Abstract

FIELD: apparatuses for feeding cooling agent onto surface of rotating rolling roll in rolling mill.

SUBSTANCE: apparatus includes casing having concave end surface turned to roll. Shape and size of said concave surface are such that it partially embraces from outside surface of rolling roll. Casing of apparatus has two mutually joined halves whose inner surfaces are turned one to another. First grooves are provided on mutually turned surfaces of casing halves. When said grooves are arranged one opposite to other, they restrict collecting duct. Second grooves are provided on the same mutually turned surfaces. When second grooves are arranged one opposite to other, they restrict ducts of nozzles passing from collecting duct to concave surface of casing turned to roll. Casing is provided with inlet branch pipe through which cooling agent is fed to collecting duct for its further feed through ducts of nozzles onto surface of rolling roll.

EFFECT: possibility for selecting used materials, optimized process for feeding cooling agent onto surface of rolling roll.

6 cl, 5 dwg

Description

FIELD OF THE INVENTION

The present invention relates to cooler supply devices, in particular, to the type of cooler supply devices used to cool work rolls in a rolling mill.

State of the art

Typically, cooler supply devices in a rolling mill are made of tubes that are bent to obtain the desired configuration, and then holes are made in the walls of the tubes at different angles to install small diameter tubes therein forming feed nozzles. The use of these technological operations of bending and drilling makes it difficult to ensure the necessary accuracy and reproducibility, which leads to a decrease in cooling efficiency, and at the same time leads to an increase in the cost of the device.

SUMMARY OF THE INVENTION

The present invention is directed to solving the above problems by means of an improved cooler supply device made of two separate mating parts (halves). In each of the mating halves, with the help of machine processing, grooves are performed with the necessary accuracy to form the collector and side supply nozzles. The collector and nozzles after combining the two halves are interconnected and provide an efficient cooler supply system.

These and other features and advantages of the present invention will be described below in more detail with reference to the attached figures of the drawings.

List of drawings

Figure 1 shows a side view of a device for supplying a cooler in accordance with this invention; the device is shown in the working position in close proximity to the work roll of the rolling mill.

Figure 2 shows a device for supplying a cooler, a side view in enlargement with a partial section.

Figure 3 shows a cross section along the line 3-3 in figure 2.

Figure 4 shows the installation for supplying a cooler, bottom view.

Figure 5 presents a typical installation in which two devices for supplying a cooler are mounted, above and below a pair of working rollers, respectively, side view.

The cooler supply device according to the claimed invention is shown in FIGS. 1-4 by 10 at a position near the work roll 12. Since the work roll is subject to normal wear, its diameter gradually decreases to the diameter shown at 12 ', after which the roll is rejected .

The cooling device comprises a housing with a concave wave-like end surface 13 facing the roll, the configuration and dimensions of which are selected such that this surface partially covers the outside of the surface of the work roll 12. The housing is made of two separate mating parts (of two halves) 14a, 14b, connected by conventional means of connection, such as, for example, screws 16 shown in the illustrative figures. Each of the mating and adjoining inner surfaces of the housing halves 14a and 14b is provided with a groove 18 for the collector with lateral grooves 20 extending from it and extending to the end wavy surface 13. When the halves of the housing are mated, the grooves 18 located opposite each other form a collector channel 24, and the side grooves 20, when placed against each other, form supply nozzles 26, directed at a certain angle, chosen so as to provide optimal cooling of the roll 12.

A cooling fluid, which may be liquid and / or gas, is supplied to the manifold channel 24 through the inlet pipe 28, which is provided with half of the housing 14 a, and then directed to the surface of the roller through nozzles 26.

The concave end surface 13 is formed on one arcuate part of the body, indicated by A in FIG. 2, and the curved in the opposite direction curved part B of the body (see FIG. 2) has a convex end surface 25 facing the roll, which is a continuation of surface 13. Parts of the housing A and B are provided with hook-shaped ends forming recesses 30a and 30b, respectively. Through the recesses 30a and 30b are the bolts 32a and 32b, which serve to attach the device for supplying the cooler to the frame 34, in which the rolls are installed. The recess 30a is slightly deeper than the recess 30b. Due to this, loosening the tightening of the bolts 32a, 32b, you can rotate the device relative to the axis of the bolt 32b to adapt to different sizes of the diameter of the roll, due to its consistent abrasion. By loosening the tightening of the bolts 32a, 32b, it is also possible to easily and quickly dismantle the device in order to replace it with another, new or repaired.

Figure 5 shows the placement of two devices for cooling 10A, 10b, while one device is installed in the form of a mirror image of the other, and each is placed in close proximity to one of a pair of work rolls 12.

Due to the proposed embodiment of the device for supplying a cooler from two separate mating halves, it can be easily manufactured using suitable tools on a conventional machine, for example, using modern three-coordinate milling machines. Much more freedom can be provided in this case when choosing the number of inlet nozzles, as well as when choosing their location and angular direction, and in the absence of the need to increase the cost of the device. To a large extent, cross-sectional shapes of the supply nozzles used are possible, including, for example, oval, T-shaped or diamond-shaped cross sections. In addition, to form a wide coolant feed zone, the supply nozzles may be located above, below, or at the level of the center line of the collector channel. A possible embodiment is also the use of replaceable inserts for nozzles and / or coating the collector channel.

Compared to conventional pipe-shaped devices, the choice of materials used has been significantly expanded, since there is no need to limit the choice of materials only to those that can withstand bending, machining and welding. The device in accordance with the claimed invention can easily be made of many different materials, including sheet metal, cast metal, plastic, ceramic or composite materials. Therefore, under the operating conditions of the rolling mill, where cooling water often carries away abrasive particles, a wear-resistant material can be used. If the cooling water contains minerals that can adhere to the walls of the channels, then in this case a release coating of the inner surfaces of the housing can be used. In addition, if necessary, a corrosion-resistant coating of these surfaces can be used.

The geometry of the collector channel (section) can be variable to ensure the same cooler pressure in each nozzle, thereby optimizing the supply of cooler to the roll.

The device can easily be disassembled to clean and restore the internal coating where it is broken.

Claims (6)

1. A device for supplying a cooling fluid to the surface of a rotating work roll in a rolling mill, comprising a housing having a concave end facing the roll, the shape and dimensions of which are such that the end surface partially covers the outside of the work roll surface, the housing being made of two mating parts - of two halves having inner surfaces facing each other, while the first grooves located opposite to each other are made on said inner surfaces angled to each other, forming a collector channel, on the indicated inner surfaces there are second grooves located opposite to each other, forming nozzle channels passing from the collector channel to the concave inner boundary, and an inlet pipe is located in the housing through which the cooler enters the collector channel and through nozzle channels for feeding to the surface of the work roll. 2. The device according to claim 1, characterized in that the concave end surface facing the roll has a wavy shape. 3. The device according to claim 1, characterized in that the arcuate first part of the housing has a concave end surface facing the roll. 4. The device according to claim 3, characterized in that the casing has an arcuate, curved in the opposite direction, the second part with a convex end surface, which is a continuation of the concave end surface. 5. The device according to claim 4, characterized in that the first and second parts of the housing are provided with first and second recesses, respectively, the configuration and dimensions of which are selected so as to ensure placement of fastening elements in the recesses for fastening the housing to the supporting structure and interacting with the recesses in the presence of mechanical contact. 6. The device according to claim 5, characterized in that the depth of the first recess is greater than the depth of the second recess to ensure the regulation of the position of the housing by rotating it relative to the fastener installed in the first recess.

Images