KR100960317B1 - Guide for cooling of wire - Google Patents

Abstract

The present invention relates to a guide for cooling a rolled material for producing a wire rod product, and a guide for cooling a wire rod having a guide body installed on a line on which the rolled material for wire rod is moved, and a cooling water pipe rotatably bearing the guide body. To; The guide body has an inlet through which coolant is introduced at a lower end thereof, a horizontal flow passage communicating with the inlet is formed at an inner surface thereof, and a pair of vertical flow passages formed at both side walls thereof communicating with the horizontal flow passage, respectively. Each vertical flow passage is configured to have an outlet opening communicating with a cylindrical opening formed at an inner center thereof; The cooling water pipe is inserted at intervals in the cylindrical hole, and the plurality of jet nozzles are formed to be inclined with respect to the circumferential direction and the axial direction through the outer peripheral surface along the longitudinal direction thereof.

According to the present invention, the heat treatment quality of the wire rod product according to the uniform cooling of the rolled material can be improved, the vibration of the rolled material can be alleviated, the finishing rolling shape of the rolled material can be improved, as well as the vibration while penetrating into the guide. The act of inducing the rolled material to the center of the guide for cooling is made to prevent contact scratches between the rolled material and the inner surface of the cooling guide, and further greatly prevent the wear of the inner surface of the guide.

Description

Guide for cooling wire rod {GUIDE FOR COOLING OF WIRE}

1 is an exemplary cross-sectional view of an injector nozzle which is one of the conventional cooling nozzles.

2 is an external perspective view of the guide of the present invention,

Figure 3 is an exploded perspective view of a part of the coolant pipe forming the guide of the present invention,

4 is a cross-sectional view of the coolant pipe forming the guide of the present invention,

5 is a side cross-sectional view of the guide of the present invention;

6 is a longitudinal sectional view of the guide of the present invention;

7 to 9 is a state diagram used in the guide of the present invention,

10 is an installation state of the guide of the present invention.

♧ description of the symbols for the main parts of the drawing ♧

100 .... Cooling water pipe 110 .... Rolled material

120 .... Squirt nozzle 130,140 .... Round protrusion

145 .... Drain 150,160 .... Bearings

200..Guide body 210 .... Inlet

220 .... Horizontal 230,240 .... Vertical Euro

231,241 .... Outlet 250 .... Space

260 .... cylinder

The present invention relates to a guide for cooling a rolled material to produce a wire rod product, and more particularly, to a wire rod rolling the rolled material while performing water-cooling heat treatment of the rolled material according to heat generated during the rolling process of the rolled material in a wire rod rolling process to a required temperature level. It relates to a guide for cooling the wire rods to be guided to the pass line.

In general, the production process of large diameter wire rod is heated to the rolling temperature of the billet (section area: 160 x 160mm) of the rolled material in a heating furnace, for example, approximately 940 ~ 1200 ℃ after the rough rolling and intermediate rough rolling, intermediate After the finishing rolling process, a large diameter wire with a diameter of 14 ~ 42mm is produced over a temperature of 1000 ℃, and then cooled to about 800 ℃ or more through water-cooling heat treatment of the water-cooling process. .

And, in accordance with the quality requirements of the wire rod product, in the middle of the intermediate or finishing rolling process, the rolled material is quenched, and at the same time through a recuperative process, the low-temperature rolled material at approximately 800 ° C. is rolled to produce and produce the wire rod product. This is already commercially available, and precooling cooling facilities are placed between the rolling processes between wire rod rolling processes to manufacture the wire rod products of good quality by appropriately cooling the heat generation of the wire rod products. The function of the cooling device to uniformly cool the material is very important for wire rod quality.                         

The heat treatment of the water-cooling process is a pair of injector nozzles and stripper nozzles and a cooling pipe is arranged between the injector nozzles and the stripper nozzles. The injector nozzles spray water in the same direction as the material traveling direction to cool the rolled material. The stripper nozzle cools the rolled material by repeatedly spraying water in a direction opposite to the direction of material progress and removes the scale of the material and the surface of the material.Then, after the winding of the wire product is completed, the wire rod The heat treatment organization of the product is completed.

Such a conventional injector nozzle (a stripper nozzle is also similar to the injector nozzle) has an inlet guide 2 and an outlet guide 3 built into the case 1, as shown in FIG. 1, and the inlet guide 2 and the outlet guide. Cooling of the rolled material is performed while the coolant is annularly sprayed on the surface of the rolled material 4 formed in a circular shape through the injection gap g formed between (3).

However, the injector nozzle maintains a small gap of approximately 0.5 to 2 mm in the size of the gap (g) to which the cooling water is supplied, so that foreign matter contained in the cooling water is caught or blocked by the injection gap (g) of the small gap. There are frequent cases where the injection of the coolant is not uniformly injected, and the coolant that is injected into the injection gap g due to the structure in the near and close distance between the annular injection gaps g at the cooling water inlet of the inject nozzle. The pressure distribution of the non-uniform distribution of the cooling water injected into the injection gap (g) is made non-uniform.

In addition, as the coolant injected from the injector nozzle is sprayed at a high speed in the rolling material traveling direction from the injection nozzle, a phenomenon in which the coolant is integrated into the lower part of the injector nozzle is caused by the gravity action of the coolant. 4) The uneven cooling of the lower surface of 4) is concentrated.

Such cooling unevenness causes different thermal expansion rates due to temperature differences, and the wire rod product passing through a long water cooling rod of 10 to 50 meters or more due to thermal expansion of the different wire rod product causes banding to the supercooled portion. This results in a serious deterioration of quality.

The present invention has been made in view of the above-mentioned problems in the prior art as described above. The cooling water is sprayed into the spray nozzle of the cooling water pipe, and a swirling rotational flow of the cooling water is formed on the surface of the circular rolling material. The cooling water is inclined in the longitudinal direction of the cooling water pipe and the cooling water rotation flow in a vortex state that surrounds the surface of the circular rolling material is continuously made while the surface of the rolling material is uniformly formed in the cooling water pipe. It is an object of the present invention to provide a guide for cooling wire rods that can be cooled to produce high quality wire rod products.

The present invention provides a wire rod cooling guide having a guide main body installed on a line to which the rolled material for wire rod is moved, and a cooling water pipe rotatably fixed to the guide main body to achieve the above technical problem; The guide body has an inlet through which coolant flows into a lower end thereof, a horizontal flow passage communicating with the inlet is formed on an inner surface thereof, and a pair of vertical flow passages formed on both sides of the guide passage respectively communicating with the horizontal flow passage. Each vertical flow passage is configured to have an outlet opening communicating with a cylindrical opening formed at an inner center thereof; The cooling water pipe is inserted at intervals in the cylindrical opening, the outer peripheral surface along the longitudinal direction through the plurality of ejection nozzles are formed to be inclined with respect to the circumferential direction and axial direction to provide a guide for cooling the wire rod There is this.

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

2 is a perspective view illustrating a cooling guide according to the present invention, bearings 150 and 160 are mounted at both ends of the cooling water pipe 100, and the cooling water pipe 100 is fixed to the guide body 200.

At this time, the coolant pipe 100 is rotatably provided in the guide body 200 by bearings 150 and 160 fixed at both ends thereof.

In particular, the coolant pipe 100 has a cylindrical structure in which the inside and the outside form a circular shape, as shown in Figure 3, the bearing mounting parts for mounting the bearings (150, 160) on the outer both ends of the coolant pipe (100) A plurality of circular protrusions 130 and 140 are formed to be curved in a groove shape in the bearing mounting parts 170 and 180, and a plurality of ejection nozzles 120 are formed in an inner center of the circular protrusions 130 and 140.

The jet nozzle 120 is punctured inclined about 5 to 15 degrees in the axial direction of the coolant pipe 100 as well as about 10 to 30 degrees inclined to the circumferential center of the coolant pipe 100, as shown in FIG. In addition, a drain hole 145 communicates with the inside of the groove shape between the circular protrusions 140.

5 and 6, the guide main body 200 has an inlet 210 through which the coolant is introduced, and a horizontal flow path 220 branching therefrom is directly connected to the inlet 210. In addition, vertical flow paths 230 and 240 are formed at each end of the horizontal flow path 220, and outlet ports 231 and 241 are formed at the ends of the vertical flow paths 230 and 240 to communicate with the center of the guide body 200. Both ends of the guide body 200 are formed with a space portion 250 for accommodating the bearings 150 and 160 mounted on the cooling water pipe 100 and the circular protrusions 130 and 140, and an inner diameter smaller than the inside of the space portion 250. Cylindrical sphere 260 having a perforation is perforated.

In addition, the guide body 200 is particularly preferably provided with a structure that can be separated into the upper and lower to easily replace the cooling water pipe (100).

The operating relationship of the present invention made of such a configuration is as follows.

First, as shown in FIG. 7, when the pressure of the cooling water is 6 bar or more, the cooling water is introduced from the inlet 210, and the cooling water is separated from the horizontal passage 220 to accommodate the cooling water through the vertical passages 230 and 240 and the outlets 231 and 241. Flows into the space 250.

Subsequently, the coolant is filled in the space part 250, and the coolant is started to be jetted to the jet nozzle 120 of the coolant pipe 100, but the space is greater than the jet volume of the coolant jetted to the jet nozzle 120. Since the cooling nozzle 100 is blown nozzle 120 of the present invention so that the amount of the coolant flowing into the water is large, the water pressure of the space 250 is raised to about 6 bar or more, the cooling water of the jet nozzle 120 Blowing flow rate is greatly increased. For example, by designing the inlet area of the space part 250, that is, the cooling water discharge side areas of the outlets 231 and 241 to be larger than the total area of the jet nozzle 120, the water pressure of the space part 250 is increased to increase the water pressure of the jet part 120. Cooling water jet flow rate can be increased.

In this case, the pressure of the cooling water is particularly preferably determined in the range of 6 to 11 bar, because it is an appropriate value obtained in the experience of the ordinary wire rod cooling process.

When the flow rate of the coolant flows quickly into the jet nozzle 120 of the coolant pipe 100, the coolant pipe 100 rotates as shown in FIGS. 7 and 8, from the jet nozzle 120 of the coolant pipe 100. The cooling water pipe 100 is rotated while reacting to the ejection of the cooling water sprayed at a high speed.

That is, since the jet nozzle 120 formed in the coolant pipe 100 has a constant inclination angle within the range as described above, when the jet of high speed jet is made at the inclination angle of the jet nozzle 120, the fast jet reaction of the coolant jets It acts on the inclination angle of the nozzle 120, which rotates the cooling water pipe 100 in the clockwise direction by the principle of action, reaction.

In addition, the cooling water flowing through both ends of the cooling water pipe 100 in this process is sealed by the circular protrusions 130 and 140, and the cooling water introduced to the recessed portions of the circular protrusions 130 and 140 is again cooled through the drain hole 145. Since the inside of the 100 enters the circular projections 130 and 140 can achieve a sufficient sealing effect.

If the jet nozzle 120 of the coolant pipe 100 is drilled at a right angle with the center without having the angle of inclination as described above, the direction of action and reaction are canceled out so that the coolant pipe 100 does not rotate.

Cooling water is spouted at high speed through the spray nozzle 120 into the cooling water pipe 100 so that the cooling water pipe 100 rotates and rotational flow of the cooling water is made in the cooling water pipe 100 as shown in FIGS. 8 and 9. When the rolled material 110 penetrates the cooling water pipe 100, the spray nozzle 120 of the cooling water pipe 100 is formed on the surface of the rolling material 110 having a circular shape penetrating into the cylindrical cooling water pipe 100. Coolant is jetted to the surface of the circular rolled material 110 to form a swirling rotational flow of the coolant to cool the rolled material 110 and to spray the coolant inclined in the longitudinal direction of the coolant pipe 100. The cooling water rotational flow of the vortex state in contact with the surrounding wrapped around the surface of the circular rolled material 110 is made continuously as shown in FIG. 10 to uniformly cool the surface of the rolled material 110 in the coolant pipe 100.The.

Then, in order to cool the rolled material 110 penetrating into the cylindrical coolant pipe 100, the coolant is jetted at high speed through the jet nozzle 120 from the outside of the coolant pipe 100 to the coolant pipe 100. As a result of the reaction according to the cooling water jet in the jet nozzle 120 of the cooling water pipe 100 is made to eject the cooling water while the cooling water pipe 100 is rotated to uniformly cool the surface of the rolled material 110 and the cooling water The rotation of the pipe 100 makes the wear part in contact with the rolled material 110 uniform, thereby improving the quality of the wire rod product.

In addition, when the rolled material 110 is eccentrically positioned in the coolant pipe 100, the pressure of the coolant increases in the contact portion between the coolant pipe 100 and the rolled material 110 due to the cooling water rotational flow. The action of moving the 110 to the center of the cooling water pipe 100 is to prevent the contact between the inner surface of the cooling water pipe 100 and the rolled material (110).                     

Therefore, according to the contact between the inner surface of the rolled material 110 and the cooling water pipe 100 can greatly prevent the wear of the inner surface of the cooling water pipe 100, as well as scratching the rolling material 110 to the inner surface of the cooling water pipe 100. It will also prevent.

As described in detail above, according to the present invention, the heat treatment quality of the wire rod product according to the uniform cooling of the rolled material can be improved, vibration of the rolled material can be alleviated, and the finishing rolling shape of the rolled material can be improved. Of course, it is possible to improve the rolling workability by suppressing the vibration of the rolled material in the finishing rolling block.

In addition, the rolling material which vibrates while penetrating into the cooling guide is guided to the center of the cooling guide to prevent scratches on the contact between the rolling material and the inner surface of the cooling guide and further prevents wear of the inner surface of the guide. can do.

Claims (4)

In the wire rod cooling guide having a guide main body 200 installed on the line for moving the rolled material 110 for wire rod, and the coolant pipe 100 is rotatably supported on the guide body 200 by bearings 150 and 160. In; The guide body 200 is formed with an inlet 210 through which the coolant flows on a lower surface thereof, and a horizontal flow path 220 communicating with the inlet 210 is formed on an inner surface thereof, and the horizontal flow path (2) is formed on both side walls thereof. A pair of vertical flow paths 230 and 240 communicating with 220 are formed, respectively, and the pair of vertical flow paths 230 and 240 are configured to have outlets 231 and 241 communicating with a cylindrical port 260 formed at an inner center thereof; The cooling water pipe 100 is inserted into the cylindrical opening 260 at intervals, and through the outer circumferential surface along the longitudinal direction thereof, a plurality of ejection nozzles 120 are formed to be inclined with respect to the circumferential direction and the axial direction. Guide for cooling the wire rod, characterized in that. The method according to claim 1, The guide body 200 is a wire rod cooling guide, characterized in that the upper, lower installed. The method according to claim 1, The coolant pipe 100 has circular protrusions 130 and 140 having grooves at both ends thereof, and the circular protrusions 130 and 140 are formed to communicate with the inside of the cooling water pipe 100 through the drain holes 145. Guide for cooling wire rod. The method according to claim 1, The jet nozzle 120 is a wire rod cooling guide, characterized in that at the same time inclined at 10 ~ 30 ° with respect to the circumferential direction, 5 ~ 15 ° with respect to the axial direction of the cooling water pipe (100).

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