KR200153195Y1 - Corrosion prevention device of coiler unit roll - Google Patents

Abstract

The present invention minimizes the occurrence of marks generated on the surface of the hot coil due to the grooves or marks generated by the impact of the strip on the surface of the unit roll of the hot rolled down mill coil equipment. At the same time, the present invention relates to a winder unit roll corrosion preventing device capable of prolonging the life of the unit roll and improving the product coil quality by preventing cracks formed on the surface of the unit roll. It has a water vapor pipe through which water vapor is discharged, and is installed in the water discharge valve and side wall at the bottom, and is equipped with a heating wire to keep the water at a temperature that can be vaporized while the power is cut off by a temperature controller and a plurality of water vapor holes inside. A T-type valve that supplies air from the air line to a casing with a multistage installation and a water tank with a control valve to supply water to the inside. A water vapor air mixing unit provided with a fish pipe; The upper part has an oil vapor pipe that is connected to the steam pipe and discharges oil vapor. It is built in the water discharge valve and the side wall at the bottom, and the temperature at which the oil can vaporize while the power is cut off by the temperature controller. T-type air supplying air from the air line to the case where the heating tank and the diaphragm having a plurality of oil vapor holes inside are installed in multiple stages, and an oil tank having a control valve for supplying oil therein is installed. An oil vapor air mixing unit provided with a pipe; Clamp blocks are formed on both sides of the spray header in which a plurality of nozzles are formed so as to be installed on the unit roll, and the clamp block is connected to a water vapor air mixing unit and a mixed discharge pipe through which the mixed gas discharged from the oil vapor air mixing unit is transferred. It is comprised by the blowing part which formed the header side piping.

Description

Winding unit roll corrosion prevention device

1 is a schematic diagram illustrating the structure of a down coiler installation.

Figure 2 is a cross-sectional side view illustrating the winding unit roll corrosion prevention device according to the present invention.

Figure 3 is a side view of the blowing unit of the winder unit roll corrosion prevention apparatus according to the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

* Explanation of symbols for main parts of the drawings

10: steam air mixing unit 11, 21: casing

12: steam piping 13,23: discharge valve

14,24: heating wire 15: steam hole

16,26: dia 17,27: thermostat

17a, 27a: temperature sensor 18: water tank

19,29: control valve 20: oil vapor air mixing part

22: oil vapor piping 25: oil vapor hole

30: T-type air pipe 40: blowing part

41: header 42: nozzle

43: clamp block 44: header piping

45: mixed discharge pipe

The present invention relates to a unit roll of a down coiler facility of a hot rolling mill, and particularly occurs on the surface of a hot coil due to a groove or a mark generated by an impact with a strip on the surface of the unit roll. The present invention relates to a winder unit roll corrosion prevention device capable of minimizing the occurrence of marks and preventing the development of cracks formed on the surface of the unit roll to improve the quality of the product coils for extending the life of the unit roll.

1 is a schematic diagram illustrating the structure of a down coiler installation.

First of all, I would like to help you understand the related equipment of the present invention.

The current hot rolled down coiler is a facility that makes a strip in the form of a roll, which is rolled in a finishing mill and then passed through a run out table, which is easy to transport in transport or other subsequent processes. In the center, a mandrel 1 corresponding to a central axis around which a strip is wound, and four unit rolls 2, 3, 4 and 5 around the mandrel 1 are installed. It helps to coil up by giving it a tension and tension when it is wound around this mandrel.

The unit roll is the No.1 unit roll (2), No.2 unit roll (3), No.3 unit roll (4), No.5 unit roll (5) It is said to be a number named by the order of advancing and winding of the strip.

The hot rolled down coiler facility has a guide that serves as a guide to help the strip to be correctly inserted into the No. 1 unit roll and the mandrel (MANDREL), which is in contact with the lower end of the incoming strip to guide the strip in There is an over-guard that acts in direct contact with the upper end of the strip of the throat guide (not shown).

After the strip enters the pinch roll of the down coiler through the runout table and is wound on the mandrel, the strip is passed through the draw guide, the over guide, and the unit rolls 2, 3, 4, and 5. At this time, the relationship between the unit roll and the mandrel is in the shape of a set of rolls that engage and rotate, and the strip passes between the engagements.

As mentioned above, when the strip passes through the draw guide and the over guide, a mark or a groove may be generated in the unit roll in the process of entering the No. 1 unit roll, which is marked by the circumferential length of the unit roll on the surface of the strip. My home will appear periodically.

In addition, the marks or grooves on the surface of the unit roll become magnetic as the scale on the surface of the strip rubs against the unit roll, and the scale is sandwiched between the unit roll and the mandrel when the strip passes between the unit and the fire. It can also cause marks or grooves on both sides of the surface.

On the other hand, the marks and grooves of the unit roll generated by the scale will not only leave marks or grooves on the surface of the strip, but also be affected by moisture such as cooling water of the downcoiler. Grooves in the surface of the problem will cause a problem that continues to grow and increase in proportion to.

In addition, due to the occurrence of cracks, the unit roll has shortened the lifespan, and it was difficult for the replacement work such as a long replacement period of 8 weeks and a short 3 days.

The present invention is to solve the conventional problems as described above, minimizing the generation of marks generated on the surface of the hot coil (coil) due to the groove (mark) generated by the impact of the strip on the surface of the unit roll At the same time, the purpose of the present invention is to provide a winder unit roll corrosion prevention device that can prevent the development of cracks formed on the surface of the unit roll, which can extend the life of the unit roll and improve the quality of the product coil.

The purpose of the present invention described above, the upper part has a steam pipe to discharge the steam in the upper and lower light type and is installed in the water discharge valve and the side wall at the bottom so that the water can be vaporized while the power supply is cut off by the temperature controller T-type air supplying air from the air line to the case where a heating tank for maintaining the temperature and a diaphragm having a plurality of steam holes therein are installed, and a water tank having a control valve for supplying water to the inside is installed. A steam air mixing unit with a pipe installed therein; The upper part has an oil vapor pipe that discharges oil vapor by connecting to the water vapor pipe in the upper and lower light type, and is installed in the water discharge valve and the side wall at the bottom so that the oil can vaporize as the power is cut off by the temperature controller. T-type air supplying air from the air line to the case where the heating tank and the diaphragm having a plurality of oil vapor holes inside are installed in multiple stages, and an oil tank having a control valve for supplying oil therein is installed. An oil vapor air mixing unit provided with a pipe; Clamp blocks are formed on both sides of the injection header having a plurality of nozzles so as to be installed on the unit roll, and the clamp block is connected to a water vapor air mixing unit and a mixed discharge pipe through which the mixed gas discharged from the oil vapor air mixing unit is transferred. It is achieved by providing a winder unit roll corrosion protection device, characterized in that consisting of a blowing section forming a hair-side piping.

Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.

2 is a side cross-sectional view illustrating the winding unit roll corrosion prevention device according to the present invention, Figure 3 is a side view of the blowing unit of the winding unit unit roll corrosion prevention apparatus according to the present invention, Figure 4 is a It is AA sectional drawing.

Referring to FIG. 2, the upper portion has a steam pipe 12 through which water vapor is discharged into the upper and lower light beams, and is installed in the lower high water discharge valve 13 and the side wall to be operated by the temperature sensor 17a. Power supply is cut off by the temperature controller 17 while the heating wire 14 to maintain the temperature that can be evaporated water and the plate 16 having a plurality of steam holes 15 therein are installed in multiple stages, Water vapor air mixing section 10 provided with a T-type air pipe 30 for supplying air from the air line 50 to a case 11 in which a water tank 18 having a control valve 19 is provided to supply water to the air. )Wow; The upper part has an oil vapor pipe 22 which is connected to the water vapor pipe 12 in the upper and lower light type and discharges the oil vapor, and is installed in the discharge valve 23 and the side wall to the lower side by the temperature sensor 27a. Multi-stage installation is provided with a heating wire 24 for maintaining the temperature at which oil can be vaporized while the power is cut off by the operating temperature controller 27 and a plate 26 having a plurality of oil vapor holes 25 therein. And oil vapor provided with a T-type air pipe (30) for supplying air from the air line (50) to a case (21) in which an oil tank (28) having a control valve (29) is provided to supply oil therein. An air mixing unit 20; Clamp blocks 43 are formed on both sides of the spraying header 41 having a plurality of nozzles 42 formed therein so as to be installed on the unit rolls, and the clamp blocks are discharged from the steam air mixing section and the oil vapor air mixing section. It consists of a blowing unit 40 is formed with a header pipe 44 is connected to the mixed discharge pipe 45 is a mixed discharge gas is conveyed.

First, the water supply control valve 19 is opened to supply water to the case 11 of the steam air mixing unit 10 to supply water from the water tank 18. When the temperature of the water supplied is detected by the temperature controller 17 with the temperature sensor 17a and the temperature of the water is equal to or lower than the vaporization temperature, that is, 100 ° C, the heating wire 14 built into the side wall of the case 11 is connected to electricity. Apply heat to maintain 100 ° C at all times to vaporize the water temperature. At the same time, the oil supply control valve 29 is opened to supply the oil from the oil tank 28 so that the oil is supplied to the case 21 of the oil vapor air mixing unit 20. When the temperature of the oil supplied is detected by the temperature controller 27 with the temperature sensor 17a and the oil temperature is equal to or lower than the vaporization temperature, heat is applied through the heating wire 24 built into the side wall of the case 21. Always maintain a vaporization point to vaporize the oil temperature. In this case, in order to prevent the temperature of the oil from getting higher and higher until the flash point, the temperature controller 27 uses the power supply and cutoff to the heating wire 24 so as not to be higher than the temperature of the vaporization point. The oil temperature in 21) must be adjusted.

The temperature of the water in the case 11 of the steam air mixing unit 10 as described above reaches 100 ° C. which can be vaporized, and the temperature of the oil in the case 21 of the oil vapor air mixing unit 20 reaches the vaporization point temperature. At this point, the air supplied from the existing air line 50 is simultaneously supplied to the steam air mixing unit 10 and the oil vapor air mixing unit 20 through the T-type air pipe 30.

The air supplied as described above is supplied to the case 11 of the steam air mixing unit 10 and the lower end of the case 21 of the oil vapor air mixing unit 20, and the air is upper by the difference in specific gravity between water and oil. As it rises to the side, in the process of the air bubbles hit the lower end of the diaphragm (16, 26) is broken finely.

Air bubbles broken by the diaphragms 16 and 26 are raised through the holes 15 and 25 formed in the diaphragms 16 and 26.

The above air bubbles become small air bubbles through the multi-stage plates, which increases the probability of contact with water or oil, which causes the air bubbles and water, or the surface of air bubbles and oil to increase in contact with each other. It is an instrument that can contain steam or oil vapor in saturated state in air bubbles.

Thus, the mixed gas containing the steam in a saturated state is collected through the steam air mixing unit 10, the case 11, and then goes out through the steam pipe (12). In the same manner, the mixed gas including the oil vapor in a saturated state is collected through the upper end of the oil vapor air mixing unit 20 and the case 21 and exits through the oil vapor pipe 22. Saturated water vapor from the steam pipe (12) and the mixed gas discharged through the oil steam pipe 22 is again mixed in the mixed gas pipe (45).

The mixed gas in which water vapor, oil and air are mixed is injected into the header 41 for injection through the header side pipe 44 on the upper side of the clamp block 43 of the blowing unit 40 installed in the unit roll along the mixed gas pipe 45. It is sprayed on the surface of the unit roll through the attached nozzle 42.

The mixed gas sprayed as described above is thinly coated on the surface of the unit roll to prevent the oxide film from being formed on the surface of the unit roll, and also serves to reduce friction with the strip.

In this case, when only the oil vapor is injected into the unit roll, it is possible to prevent the ignition by injecting water vapor together in preparation for being ignited.

As described above, by installing the winding unit roll corrosion prevention device of the present invention, the mark on the surface of the hot coil due to the grooves or marks generated by the impact with the strip on the surface of the unit roll It can prevent, prevent the progress of the crack (crack) formed on the surface of the unit roll, it is effective to extend the life of the unit roll and improve the quality of the product coil.

Claims (1)

The upper part has a water vapor pipe 12 through which the water vapor is discharged in the upper and lower light type, and is supplied to the bottom by the temperature controller 17 having the temperature sensor 17a built in the water discharge valve 13 and the side wall. Heated wire 14 and the diaphragm 16 having a plurality of steam holes 15 therein are installed in multiple stages to keep water at a temperature capable of vaporizing while being shut off, and a control valve 19 to supply water to the inside is provided. A steam air mixing unit (10) provided with a T-type air pipe (30) for supplying air from the air line (50) to a case (11) provided with a water tank (18) having a); The upper part has an oil vapor pipe 22 which is connected to the water vapor pipe 12 in the upper and lower light type and discharges the oil vapor, and has a temperature sensing sensor 27a installed in the discharge valve 23 and the side wall in the lower part. The electric power is cut off by the temperature controller 27 and the heating wire 24 for maintaining the oil vaporization temperature and the diaphragm 26 having a plurality of oil vapor holes 25 therein are installed in multiple stages. Oil vapor air mixing unit provided with a T-type air pipe (30) for supplying air from the air line (50) to a case (21) provided with an oil tank (28) having a control valve (29) to supply oil therein. 20; Clamp blocks 43 are formed on both sides of the spraying header 41 having a plurality of nozzles 42 formed therein so as to be installed on the unit rolls, and the mixtures discharged from the water vapor air mixing unit and the oil vapor air mixing unit are provided on the clamp blocks. Winding unit roll corrosion prevention device, characterized in that consisting of a blowing unit 40 formed with a header pipe 44 is connected to the mixed discharge pipe 45 is a gas transfer.