KR100972194B1 - Preventive apparatus for bending pipe for cooling water for rolling mill - Google Patents

Abstract

Disclosed is a pipe bending prevention device for cooling water of a rolling mill. Pipe bending prevention device for cooling water of the disclosed rolling mill, the work roll is installed in the upper and lower, the choke is installed on both sides of the work roll, the beam connected to the choke is installed, the beam inside the beam The cooling machine pipe is installed in one axis, and the rolling mill is connected to the cooling water pipe and disposed in the choke and provided with a supply pipe for supplying the cooling water, wherein the cooling water is connected to the cooling pipe due to the high heat. When the receiving pipe is expanded, a clearance assembly pipe spaced by the expansion portion is installed to prevent bending of the pipe for cooling water.

According to the present invention, it is possible to shorten the replacement maintenance time of the cooling water pipe, to improve the surface quality of the thick plate and hot rolled products, there is an advantage that can improve the plate quality and product productivity.

Rolling mill, work roll, pipes for cooling water

Description

Pipe banding prevention device for cooling water of rolling mill {PREVENTIVE APPARATUS FOR BENDING PIPE FOR COOLING WATER FOR ROLLING MILL}

1 is a view schematically showing the configuration of a typical rolling mill.

FIG. 2 is a view schematically showing the main components of FIG.

3 is a side view of FIG. 2;

4 is a perspective view of the work roll in FIG. 2.

Figure 5 is a schematic view showing the configuration of a pipe bending prevention device for cooling water of a rolling mill according to the present invention.

6 is a detailed exploded perspective view of the main portion of FIG.

<Description of the symbols for the main parts of the drawings>

1. rolling mill

2.work roll

4. Choke

6. Supply pipe

7b. Coolant pipe

8. Nozzle

9. Nut groove

10. Flow packing

11.flow nut

12. Play assembly pipe

14, 15.bolts

16. Hose

The present invention relates to a pipe bending prevention device for cooling water of a rolling mill, and more particularly to a pipe bending prevention device for a cooling water of a rolling mill for preventing the bending of the cooling water pipe to prevent the occurrence of defective products.

As shown in FIG. 1, generally, the rolling mill 1 is provided with a backup roll (not shown) up and down, and a work roll 2 up and down.

2 and 3, the choke 4 is installed at both sides of the work roll 2, and the beam 3 connected to the choke 4 is installed in the rolling stand. In this beam 3, a cooling water pipe 7a is provided with the beam 3 as one axis.

In addition, the choke 4 is connected to the cooling water pipe 7a and the supply pipe 6 and the hose 16 for supplying the supply water are connected.

In addition, a plurality of nozzles 8 are installed in the cooling water pipe 7a to inject the supplied water, and the slab 17 is transferred to the rolling mill 1 through the roller table 5.

However, the cooling water pipe 7b due to heat generation from the high temperature slab 17 entering through the roller table 5 generated in the rolling process of the rolling mill configured as described above is bent to the surface of the work roll 2. In close contact with each other, as shown in FIG. 4, scratches 18 are generated on the work roll 2 surface and the close contact portion.

Accordingly, there is a problem that a defect occurs on the work blade surface.

The present invention has been made to solve the above problems, prevents the bending of the pipe to prevent the occurrence of scratches on the surface of the work roll, and prevents the bending of the pipe for cooling water pipe mill of the rolling mill so that no defect occurs on the surface of the blade plate The purpose is to provide.

Pipe bending prevention device for cooling water of the rolling mill of the present invention for achieving the above object, the work roll is installed up, down, choke is installed on both sides of the work roll, the beam connected to the choke In the rolling mill is installed inside the beam, the pipe for cooling water uniaxially with the beam, and is connected to the cooling water pipe and disposed in the choke and provided with a supply pipe for supplying cooling water, wherein the cooling water pipe And between the supply pipe is characterized in that the clearance assembly pipe which is spaced as much as the expansion portion is installed when the cooling water pipe is expanded due to the high heat to prevent bending of the cooling water pipe.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 is a schematic view showing the configuration of a pipe bending prevention device for cooling water of a rolling mill according to the present invention, Figure 6 is a detailed exploded perspective view of the main portion of FIG.

Prior to the description, the configuration of a general rolling mill will be described with reference to FIGS. 1 to 3 above, and only the characteristic configuration and operation of the pipe bending preventing device for cooling water of the rolling mill according to the present invention will be described.

Accordingly, the same reference numerals as those of FIGS. 1 to 3 in FIGS. 5 and 6 show the same members having the same functions.

Referring to each of the drawings, the pipe bending prevention device for cooling water of the rolling mill according to the present invention,

A backup roll (not shown) and a work roll 2 are installed above and below the rolling mill 1 as shown in FIG. 1 and the choke (both sides) of the work roll 2 are provided. 4) is assembled inside the rolling stand.

In addition, a beam 3 connected to the choke is installed, and a cooling water pipe 7b and a flow packing 10 are installed in a double axis with the beam 3 as one axis, and the flow is provided therein. The nut 11 is provided in the nut groove 9 formed inside the cooling water pipe 7b.

In addition, between the choke (4) and the choke (4) is provided with a supply pipe (6) connected to the hose (16) and an integral cooling water pipe (7b), the outside of the cooling water pipe (7b) The nozzle 8 is provided.

And between the cooling water pipe (7b) and the supply pipe (6), the play assembly pipe 12, the packing member 13 is installed on one side of the supply pipe (6), the play assembly pipe 12 is a fastening member, , The bolt 14 is fastened to the external assembly position of the choke 4, and the cooling water pipe 7b is installed on the opposite choke 4 with the bolt 15.

In addition, a fastening hole (not shown) for fastening the bolt 14 is formed at the outside of the play assembly pipe 12, and similarly at an end to which the cooling water pipe 7b and the choke 4 are connected. A fastening hole (not shown) is formed to assemble the bolt 15 so that the bolt 15 is coupled to the choke 4.

Therefore, when the clearance assembly pipe 12 is spaced as much as the pipe expansion portion during the expansion of the cooling water pipe 7b due to the high temperature, the bending of the cooling water pipe 7b is prevented.

Referring to the operation of the pipe bending prevention device for cooling water of the rolling mill according to the present invention having the configuration as described above are as follows.

Referring again to the drawings, the pipe bending prevention device for cooling water of the rolling mill according to the present invention, first, by sending the cooling water to the rolling mill roll cooling water supply hose 16 at a pressure of 5 ~ 7kg / cm², the pipe for cooling water (7b) Cooling water is supplied to the surface of the work roll 2 and sprayed.

And while rolling the high-temperature slab 17 transferred from the heating furnace with the rolling mill (1), the cooling water pipe (7b) is expanded in the cooling water beam (3) installed on the left and right of the work roll (2).

The expanded cooling water pipe 7b is pushed into the expansion assembly clearance in the direction of the clearance assembly pipe 12 which withstands expansion by the partial stage assembly.

In addition, the gap is expanded into a material packing 10 resistant to thermal deformation, and when the temperature decreases, the clearance assembly pipe 12 is moved in a small amount of position as much as the expanded portion.

Then, the next material is extracted from the heating furnace and rolled while the slab 17 of high heat is moved forward and backward to the rolling mill 1. By repeating the material slab 17 around the rolling mill (1) to move the slab 17 forward and backward to produce a thick plate by the work size and thickness and length of the working thick plate.

As described above, the pipe bending prevention device for cooling water of the rolling mill according to the present invention has the following effects.

It is possible to prevent scratches on the work roll surface by separating and assembling pipes for cooling water of rolling mills in hot rolling and thick plate processes of steel mills to prevent pipe bending due to heat changes.

Therefore, it is possible to shorten the replacement maintenance time of the cooling water pipe, to improve the surface quality of the thick plate and hot rolled products, and to improve the plate quality and product productivity.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (5)

The work roll is installed on the upper and lower sides, and the choke is installed on both sides of the work roll, and the beam connected to the choke is installed, and the cooling water pipe is installed on the beam in one axis. In the rolling mill is connected to the cooling water pipe and provided in the choke and having a supply pipe for supplying the cooling water, Between the cooling water pipe and the supply pipe due to the high temperature, when the cooling water pipe is expanded, a clearance assembly pipe which is spaced as much as the expansion portion is installed to prevent bending of the cooling water pipe, A flow nut is installed at the front end of the pipe for cooling water, and a nut groove is formed in the front end of the pipe for cooling water to install the flow nut, and one side of the flow nut is provided with a double flow packing. Pipe banding prevention device for cooling water of rolling mill. delete delete The method of claim 1, The clearance assembly pipe is a pipe bending prevention device for cooling water of a rolling mill, characterized in that the fastening member is used to be installed outside the choke. The method of claim 1, Pipe bending prevention device for cooling water of the rolling mill, characterized in that the packing member is installed between the supply pipe and the play assembly pipe.

Images