KR100292275B1 - Vacuum suction rolls for removing rolling mill lubricant on surface of steel sheet - Google Patents

Abstract

PURPOSE: A vacuum suction rolls are provided in which the surface of the rolls is coated with a special fiber, and a vacuum pump is operated in the state that the inside of the rolls is hollow so that a negative pressure(vacuum) is formed inside the rolls, thereby sucking and removing a rolling mill lubricant remained on the surface of a steel sheet. CONSTITUTION: In a vacuum suction roll unit for removing a rolling mill lubricant remained on the surface of a plated steel sheet, the vacuum suction roll unit for removing the rolling mill lubricant on the surface of the steel sheet comprises vacuum suction rolls(51a,51b) which are consisted of a mount and a fiber layer, and which are vertically movably and rotationally installed, wherein a hollow part is formed inside the mount, suction tubes are formed at the wall part of the mount, and the fiber layer is adhered onto the outer circumference of the mount; rotary joints(53) each of which are installed at one end parts of the vacuum suction rolls(51a,51b); a vacuum pump(71) for maintaining the inside of the suction rolls in the vacuum state; an inlet separator(61) which is installed between the vacuum suction rolls(51a,51b) and the vacuum pump(71) so as to separate air and rolling mill lubricant from the wet oil by recovering a wet oil sucked into the vacuum suction rolls(51a,51b); and a discharge separator(81) for exhausting the air separated from the inlet separator(61) into the atmosphere.

Description

Vacuum suction roll for removing rolled oil from steel plate surface

The present invention relates to an apparatus for removing the rolled oil sprayed from the skin pass mill (SKIN PASS MILL) of the equipment for manufacturing galvanized steel sheet, more specifically, the surface of the roll (ROLL) coated with a special fiber (COATING) and the inside of the roll The present invention relates to a vacuum suction roll for removing rolling oil on a surface of a steel sheet, which is formed in a hollow state to operate a vacuum pump to form a negative pressure (vacuum) inside the roll to suck and remove the rolling oil remaining on the surface of the steel sheet.

In general, SKIN PASS MILL of galvanized steel sheet production equipment removes stress of steel plate by correcting the shape of steel plate and applying drawing to remove tension stress of steel plate and chrome treatment facility of post treatment. It is a facility to transfer to (CHROMATE).

As shown in FIG. 1 (a) and FIG. 1 (b) which is a cross sectional view of a conventional rolled oil removing apparatus, the crude rolling mill 11 has a pair of work rolls. Steel plate shape is calibrated as the plated steel sheet S passes between the (WORK ROLL) 16, depending on the type of galvanized steel sheet 5 to be produced or not using a rolling oil (WET OIL).

When rolling oil is used, the work roll (16) and the mini spangle products (i.e., products with zinc plated cold rolled coils and suppressed spangle formation of the plated layer) are produced. SPRAY NOZZLE (12) between the work roll (16) and the galvanized steel sheet (5) during the temper rolling process to reduce the frictional force with the galvanized steel sheet (5) and to impart a high elongation to the galvanized steel sheet. The installation is carried out while spraying the rolling oil.

On the other hand, when the rough rolling is performed without the rolling oil is applied to the regular product (REGULAR SPANGLE), in this case the work is performed without spraying the rolling oil.

However, the rolled oil sprayed during the production of the mini-spangle products must be removed before entering the galvanized steel sheet 5 into the tension leveler (not shown) and the chromium treatment device (not shown). Conventional apparatus are shown in FIGS. 1 and 2.

According to the related art, the air spraying device for removing rolling oil is provided with a pair of upper and lower air nozzles 13a between the work roll 16 and the tension applying roll 14 of the temper rolling device 11 and the tension applying roll 14 and A pair of upper and lower air nozzles 13b are positioned between the tension sensing rolls 15, and the air nozzles 13a and 13b are provided with a plurality of nozzles and are installed toward the galvanized steel sheet 5.

The conventional air spraying device configured as described above exits the temper mill 11 with the galvanized steel sheet 5 and the rolling oil applied to the upper and lower surfaces thereof, and the high-pressure air through the air nozzles 13a and 13b. It is designed to remove the rolling oil by spraying

However, when using the air spraying method as described above, the water-soluble rolling fluid was not completely removed. Therefore, in the state where the rolling oil is attached to the galvanized steel sheet (S) attached to the roll (ROLL) of Revelra (not shown) as a crystal, it is transferred to the surface of the steel sheet to cause surface defects of foreign matters, and also the chrome treatment apparatus ( It is the main cause of product defects such as entering the (not shown) to contaminate the chromium solution and interfere with the formation of the chromium film.

Therefore, the present invention has been made in order to solve the above problems, the special fiber is attached to the roll surface in the circumferential direction and absorbs the rolling oil on the surface of the plated steel sheet (S) by using capillary action, then operates the vacuum pump It is a device that draws and discharges the rolling oil by forming a vacuum (negative pressure) state inside the rolls. It is an object of the present invention to provide a vacuum suction roll device for removing rolling oil on the surface of a steel sheet, which does not contaminate the chromium solution, forms a beautiful chrome coating, and reduces production costs by recovering the rolling oil.

1 (a) is a block diagram of a conventional rolling oil removing device.

FIG. 1 (b) is a cross-sectional view A-A 'of the device according to FIG. 1 (a).

2 is a block diagram of a vacuum suction roll device for removing the rolling oil on the surface of the steel sheet according to an embodiment of the present invention.

3 (a) is a state of use of the device according to FIG.

3 (b) is a cross-sectional view A-A ′ of the device according to FIG. 3 (a).

4 is a view for explaining the principle of vacuum suction according to the present invention,

4 (a) is a schematic diagram,

4 (b) is a principle diagram,

4 (c) is a flowchart of a vacuum.

* Explanation of symbols for main parts of the drawings

11: SKIN PASS MILL 12: Rolling oil spray nozzle

13: AIR NOZZLE 14: Tension Roll (ROLL)

15: tension sensing roll 16: WORK ROLL

50: vacuum suction roll device 51: vacuum suction roll (ROLL)

52: AIR CYLINDER 53: ROTARY JOINT

54: MOTOR 55: Shaft

61: INLET SEPARATOR 71: Vaccum Pump

72: Pump Motor

81: drain separator 101: wet part

102: DRY PART 103: Support

104: suction pipe 105: vacuum part (VACCUM PART)

In order to achieve the above object, the present invention is a vacuum suction roll device for removing the rolling oil remaining on the surface of the plated steel sheet, the support portion 104 is formed in the cavity 105 and the suction pipe 104 in the wall portion therein And a fibrous layer (102) attached to the outer periphery thereof, the vacuum suction rolls (51a) and (51b) which are movable and rotatably installed, and rotary joints respectively provided at one end of the suction rolls. (53) and the vacuum pump 71 for vacuuming the inside of the suction roll and the suction roll and the vacuum pump to recover the rolling oil sucked in the suction roll to separate the air and the rolling oil. The suction separator 61 and the discharge separator 81 which exhausts the air from the said suction separator to air | atmosphere are provided, The vacuum suction roll apparatus for removing the rolling oil of the steel plate surface characterized by the above-mentioned. The ball.

Hereinafter, an embodiment of the present invention will be described in more detail with reference to the accompanying drawings. 2 is a configuration diagram of a vacuum suction roll device for removing rolling oil from a steel plate surface according to an embodiment of the present invention, and FIG. 3 (a) is a diagram showing a state of use of the apparatus according to FIG. ) Is a cross-sectional view AA of the apparatus according to the third (a), Figure 4 is a view for explaining the vacuum suction principle according to the present invention, Figure 4 (a) is a schematic view, Figure 4 (b) is a principle diagram 4 (c) is a flowchart of a vacuum.

2 and 3, the suction roll device 50 according to the present embodiment is a suction roll (51a) 511 and the inlet separator 61, the vacuum pump 71 and the discharge separator (81) Equipped)

The suction roll 51 is made of special fibers and attached in the circumferential direction, and two air cylinders 52a and 52b are installed on the shaft 55 of the upper suction roll 51a as shown in FIG. This raises the upper suction roll up and down. Air cylinders (52a, 52b) is provided with a pressure gauge (not shown) can check the pressure value that is pressed on the roll.

The driving motor 54 is mounted on the lower suction roll 51b to drive the roll. In addition, a rotary joint 53 is provided at the end of the roll shaft. In addition, an inlet separator 61 for separating the rolled oil sucked by the suction rolls 51a and 51b is provided to separate the rolled oil and the air.

The rear end of the inlet separator 61 is provided with a vacuum pump 71 and a motor 72 for operating the vacuum pump 71. In addition, a discharge separator 81 for finally separating the granulated oil and the air mixture passed through the vacuum pump 71 is provided.

Referring to the operation of the vacuum suction roll device for removing the rolling oil on the surface of the steel sheet according to the present invention configured as described above are as follows.

In order to remove the residual rolling oil on the surface of the steel sheet passed through the rough rolling mill 11, the drive motor 54 connected to the lower suction roll 51b is operated. Then, the upper suction roll 51a is pressed by a pair of air cylinders 52a and 52b to be in close contact with the steel plate surface S. The pair of suction rolls 51a and 51b which are in close contact with the plated steel sheet S are capillary phenomenon. The oil rolled on the surface of the steel sheet is infiltrated on the surface of the roll, and the oil rolled on the surface of the suction rolls 51a and 51b is formed by the vacuum pressure (about -300 to -400mmHg) formed by the operation of the vacuum pump 71. 51b) aspirated internally.

4 shows the principle of vacuum suction by the suction roll. As shown in FIG. 4 (a), the rolling oil 1a that penetrates the surfaces of the suction rolls 51a and 51b while the strip S passes between the suction rolls 51a and 51b is initially subjected to the fourth pressure. As shown in FIG. 4B, the wet part 101 is formed, but as shown in FIG. 4C, due to the rotation of the roll and the negative pressure of the roll vacuum unit 105 as shown by the arrows, Similarly, it is sucked into the roll vacuum part 105 through the suction pipe 104, and it progresses to the dry part (DRY PART) 102 finally.

As described above, the rolled oil and the air mixture collected in the roll vacuum unit 105 are transferred to the inlet separator 61 through a rotary joint 53.

The rolled oil mixture drawn into the drawing separator 61 is separated and recovered through a filter FILTER, and air is directed to the vacuum pump 71. In addition, the vacuum pump 71 is operated by the pump motor 72 to generate a vacuum pressure of about (-300 ~ -400mmHg), the vacuum pump 71 is cooled by the cooling water. A discharge separator 81 is installed at the rear of the vacuum pump 71, and the particulate rolled oil and air encapsulated in the discharge separator 81 are separated, and the air is exhausted to the atmosphere, and the rolled oil is recovered.

Although the present invention has been described and illustrated with reference to a preferred embodiment thereof, it can be clearly understood that various changes and modifications can be made to the embodiment without departing from the gist of the present invention.

According to the present invention as described above, by removing the rolled oil remaining on the surface of the steel sheet after the temper rolling by using a vacuum suction roll effectively solves the problems raised in the prior art.

That is, it does not contaminate the level rolls and does not contaminate the chromium solution of the aftertreatment facility, thereby improving product quality and reducing the production cost by recovering the rolled oil.

Claims (1)

In the vacuum suction roll device for removing the rolled oil remaining on the surface of the plated steel sheet, the support base 103 having the cavity 105 and the suction pipe 104 formed on the wall and the fiber layer attached to the outer circumference thereof ( 102, vacuum suction rolls 51a and 51b which are movable and rotatably installed, a rotary joint 53 having the suction rolls installed at one end thereof, and the suction rolls inside. A vacuum pump 71 for making a vacuum state, an inlet separator 61 disposed between the suction roll and the vacuum pump to collect the rolls sucked by the suction roll and separating the air into the rolling oil, And a discharge separator (81) for evacuating air from the separator to the atmosphere.