KR20010065234A - Device for removing salt of bridle roll - Google Patents

Abstract

PURPOSE: An apparatus for removing congealed salt of bridle rolls is provided to improve the working efficiency by easily and certainly removing congealed salt. CONSTITUTION: An apparatus for removing congealed salt of bridle rolls(12,14) includes first and second movable blocks(24,26) installed to advance and retreat between the bridle rolls, first and second fixed blocks(32,34) fixing and maintaining advance state of the movable blocks, and first and second salt removing blades mounted at each movable block for passing a pretreatment progress and removing the congealed salt adhered to the surface of the bridle rolls, wherein a plurality of air nozzles are installed at the movable block for jetting the air at the predetermined angle, and an induce plate installed at the lower part of the salt removing blade for inducing the congealed salt so that the removed congealed salt is discharged to the outside of the bridle rolls by the air jetted from the air nozzles.

Description

Solidification salt removal device of bridal roll {DEVICE FOR REMOVING SALT OF BRIDLE ROLL}

The present invention relates to a pickling pretreatment process provided between an annealing process and a pickling process, and more particularly, a solidification salt fixed to a surface of a front and rear bridal roll provided to adjust a feed rate of a strip in a pickling pretreatment process. It relates to a solidification salt removal device of the bridal roll that can be removed reliably and easily.

In general, the pickling process is a process for removing the oxidized scale generated on the surface of the stainless steel during the hot rolling, heat treatment, etc., the pretreatment process to improve the peelability of the scale should be performed before this pickling process .

Such pretreatment processes typically include a mechanical method, a chemical method, and an electrochemical method. Among the above methods, the chemical method includes NaOH which blows H ₂ into a molten NaOH bath and reacts with Na to reduce the scale by NaH. And a hooker method in which a strip is deposited in a bath in which a salt in which an oxidizing agent is added to alkali is melted at about 480 ° C. to change the composition of the oxidizing scale into a porous material.

1 illustrates a pretreatment process using the hooker method, which will be briefly described with reference to the pretreatment process as follows.

As a device required for the pretreatment process, a salt bath 110 contained in a salt solution maintained at a temperature of about 450 to 500 ° C. and a salt bath 110 installed in the salt bath 110 are installed in the strip S. Wiper roll 112 for removing the attached salt, water jet nozzle portion 114 for removing salt by spraying high pressure water onto the strip passing through the roll 112, and water jet nozzle portion 114 There are rolls for conveying the strip passing through to the pickling bath 116, which include upper and lower string rolls 118 and 120 for centering the strip, and upper string roll 118 and pickling bath. 116 is installed between the front and rear bridle roll (122 124) to adjust the strip conveying speed according to the thickness and steel grade of the strip, and the upper and lower tension roll (tension) to adjust the tension of the strip entering the pickling bath (116) roll: 126,128).

Here, reference numeral 130 denotes a dip roll for dipping the strip into the salt solution in the salt bath, and reference numeral 132 denotes a dryer for drying the water sprayed from the water spray nozzle unit.

Accordingly, when the strip S passing through the annealing furnace is deposited in the salt solution by the deposition roll 130 installed in the salt bath 110, the oxidation scale of the strip surface is changed to porous and is buried on the surface of the strip. The salt solution is removed when the strip passes through the wiper roll 112 and the water spray nozzle portion 114, and the strip from which the salt solution is removed is advanced to the pickling bath 116 by the rolls, and the acid solution inside the pickling bath. The scale is removed by

However, according to the pretreatment process configured as described above, when the salt solution buried on the surface of the strip is incompletely removed while passing through the wiper roll 112 and the water jet nozzle unit 114, the salt solution solidifies on the surface of the strip. It is often caused to adhere to the surface of the rolls, and when the solidification salt is attached to the roll surface, the surface of the strip is pressed by the salt and surface defects are generated.

Therefore, when a surface defect occurs in the strip, the worker removes the solidification salts attached to the roll surface manually by using a separate jig. However, according to the manual removal of salts, the gaps are separated from each other. Salt removal can be performed relatively easily in the upper and lower string rolls 118 and 120. However, salt removal is very difficult and difficult in the front and rear bridal rolls 122 and 124 installed adjacent to each other. Was very big.

On the other hand, when NaOH (caustic soda) component is not applied to the surface of the strip passing through the salt bath, a water film is formed on the bridal rolls 122 and 124 due to the caustic soda component to slip and pull the strip. When the surface of the roll is washed to remove the water film, there is a problem such as an increase in cost and an increase in chromium waste water due to the washing operation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a solidification salt removing device for a bridal roll capable of reliably and easily removing a solidification salt fixed to a surface of a front and rear bridal roll.

Another object of the present invention is to provide a bridle roll which can prevent slippage and deflection of a strip by preventing the formation of a water film on the front and rear bridal rolls.

1 is a block diagram showing an embodiment of a general pickling pretreatment process.

Figure 2 is a perspective view showing the solidification salt removal apparatus of the bridal roll according to the present invention.

Figure 3 is a perspective view showing the main part of the solidification salt removal apparatus according to the present invention.

Figure 4 is an installation state of the salt removal blade applied to the device of the present invention.

An object of the present invention as described above, in the pair of bridal rolls installed on the transfer line for transferring the strip of the pickling pretreatment process to the pickling process to adjust the feed rate of the strip,

First and second moving blocks mounted to the space between the bridal rolls in a retractable manner;

First and second fixed blocks for fixing and maintaining the entry state of the moving block;

First and second salt removing blades respectively provided on the moving block to remove solidification salts stuck to the surface of the bridal roll while passing through the pretreatment process;

It includes.

Hereinafter, with reference to the accompanying drawings will be described in detail the solidification salt removing device of the bridal roll according to a preferred embodiment of the present invention.

Figure 2 shows a perspective view of the device of the present invention, wherein the base plate 18 is provided on both sides of the roll mounting frame 16, which is rotatably installed in a state where the pair of bridal rolls 12 and 14 are adjacent to each other. The base plate 18 is provided with first and second moving rails 20 and 22 positioned in the space between the bridal rolls 12 and 14 at predetermined intervals up and down, and the moving rail 20 22 is provided with first and second moving blocks 24 and 26, which move forward and backward along the rail, respectively.

The lower surfaces of the moving rails 20 and 22 are provided with cylinders 28 and 30 for advancing and moving the moving blocks 24 and 26, respectively. Fixing blocks 32 and 34 for fixing and maintaining the advanced state are installed to be movable by the cylinder 36, respectively, and the rubber plates 32 which are in close contact with the moving blocks 24 and 26 are fixed to the fixing blocks 32 and 34, respectively. ') Is provided.

Here, the moving block is configured to automatically stop the entry operation when the sensing bar 38 connected to the rod ends of the cylinders 28 and 30 is detected by the sensor 40, as shown in FIG. The fixing blocks 32 and 34 are configured to automatically stop the back and forth operation as the guide bar 42 is detected by the sensor 44.

Meanwhile, the solidification salt fixed to the bridal rolls 12 and 14 is removed from one side of the moving blocks 24 and 26 (the right side of the first moving block and the left side of the second moving block in FIG. 2). Since a salt removal blade is provided for the above, since the first and second moving blocks are configured in the same manner, only the configuration of the first moving block will be described below.

3 and 4, a cylinder 48 having a pressure plate 46 integrally installed at both ends of the moving block 24 is provided at the rod end, and salt is removed at the rod end of the cylinder 48. The blade 50 is hinged, the pressing plate 46 and the removal blade 50 is coupled in a state spaced apart by a predetermined interval by the bolt 52 and the nut 54, the pressing plate 46 to the bolt 52 And a spring 56 for pressing the removal blade 50 away from each other is installed.

Here, the cylinder 48 is reversed so that the removal blade 50 is embedded in the moving block 24 when the removal blade is inoperative, and the removal blade 50 is bridal when the removal blade is operated. Advancing to contact the surface of the roll 14, the removal blade 50 in the forward operation described above is the pressure plate 46 and the pressure plate 46 and the removal blade 50 fixed integrally to the rod end of the cylinder 48 By the action of the spring 56 interposed between the) close to the surface of the bridal roll 14.

In addition, an air supply pipe 60 having a plurality of air nozzles 58 is fixedly installed to the moving block 24 below the removal blade 50, and a solenoid controlling air supply to one side of the air supply pipe 60. A valve (not shown) is provided, and below the removal blade 50, the solidification salt removed by the removal blade 50 is outside of the bridle roll by the air injected from the air nozzle 58, and preferably one side. An induction plate 64 is provided to guide the solidification salt to be discharged to the salt discharge port 62 provided in the base plate.

Here, the air nozzle 58 is installed to be inclined at an angle of α ° from the x axis to the salt discharge port 62 side to effectively discharge the removed solidification salt, and β ° from the y axis to the bridle roll 14 side. It is installed inclined by the angle of.

Hereinafter, the operation of the present invention configured as described above.

After the pretreatment process is completed, the strip passes through the upper and lower string rolls and the front and rear bridal rolls, and proceeds to the washing bath. When the strip is solidified on the surface of the bridle roll, the solidification salt This results in defects on the surface of the strip.

Therefore, when a surface defect occurs in the strip, the operator operates a switch of a control panel (not shown) to operate a cylinder corresponding to a bridal roll having a surface defect, and the cylinder 28 is operated by the switch operation. When the moving block 24 is moved on the moving rail 20 to enter the space between the bridal rolls 12 and 14, the moving operation of the moving block 24 is performed by the sensing bar 38 to the sensor 40. Stop when detected.

When the entry of the moving block 24 is completed as described above, the operator operates the cylinder 36 to move the fixing blocks 32 and 34 to fix the moving block 24 and to operate the cylinder 48. While advancing the salt removal blade 50 to the bridle roll 14 side, air is injected through the nozzle 58 by opening a solenoid valve and supplying air to the air supply pipe 60.

At this time, the salt removal blade 50 is in close contact with the surface of the bridal roll 14 by the action of the spring plate 56 interposed between the pressure plate 46 and the pressure plate 46 and the removal blade 50.

Accordingly, the solidified salt removed by the salt removing blade 50 is transported on the guide plate 64 by the air injected from the nozzle 58 and discharged to the salt discharge port 62.

When the solidification salt removal operation is completed according to the above operation, the operator first stops the operation of the nozzle 58, and then retracts the fixing blocks 32 and 34 to allow the movement of the moving block 24. Retract transfer block 24 to the wait state for the next solidification salt removal operation.

And, the reverse operation of the fixed block as described above is automatically stopped when the guide bar 42 is detected by the sensor 44.

Therefore, the solidification salt stuck to the surface of the bridal roll can be easily and reliably removed.

Meanwhile, the bridal rolls 12 and 14 of the present invention have an uneven surface as shown in FIG. 2, and thus, when the uneven surface is formed, the bridal rolls are formed by NaOH (caustic soda) that is not removed from the strip surface. It can prevent that a water film is formed in a roll.

Therefore, it is possible to prevent the slip and pull of the strip caused by the formation of the water film, and it is not necessary to wash the surface of the bridal roll to prevent water film generation as in the prior art, so that the cost increases due to the cleaning operation and the generation of chromium waste water. You can eliminate the problem.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

As described above, according to the apparatus of the present invention, since the solidification salt removal operation is performed by a mechanical device, there is no risk of occurrence of a safety accident, and the solidification salt can be easily and reliably removed, thereby improving work efficiency. And the removed solidification salt is discharged through the salt outlet to prevent restocking of the removal salt and deterioration of the working environment due to the salt.

In addition, it can contribute to the improvement of quality by minimizing the defective rate of the product by the rapid defect response, in the case of forming the irregularities on the surface of the roll, it is possible to prevent the slip and pull of the strip caused by the water film formation, the water on the surface of the roll There is an effect that can eliminate problems such as cost increase and chromium waste water generated by the cleaning operation.

Claims (3)

In a pair of bridal rolls installed on a transfer line for transferring a strip of the pickling pretreatment process to a pickling process to control the feed speed of the strip, First and second moving blocks mounted to the space between the bridal rolls in a retractable manner; First and second fixed blocks for fixing and maintaining the entry state of the moving block; First and second salt removing blades respectively provided on the moving block to remove solidification salts stuck to the surface of the bridal roll while passing through the pretreatment process; Solidification salt removal device of the bridal roll comprising a. According to claim 1, The moving block is provided with a plurality of air nozzles for injecting air at a predetermined angle, the lower side of the salt removal blade is the air from which the solidification salt removed by the removal blade is injected from the air nozzle And a guide plate for inducing the solidification salt to be discharged to the outside of the bridal roll by the solidification salt removing device of the bridle roll. The solidification salt removal apparatus of the bridle roll according to claim 1 or 2, wherein the salt removing blade is rotatably installed while being pressed against the bridal roll side.