JP2010253487A - Method and device for removing soil on roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for removing soil by which the soil stuck to the surface of a roll in contact with a metallic sheet can be removed appropriately in good operability in a treatment apparatus of the metallic sheet such as a steel strip. <P>SOLUTION: A rinsing apparatus of an alkali degreasing line for the steel strip is provided with: a doctor knife 31 for scraping the soil 50 stuck to the surface of the upper back up roll 22A; a receiving trough 32 for receiving the soil 50 scraped with the doctor knife 31; and a rinse solution jetting means (nozzle header 33 and spraying nozzles 34) for discharging the soil 50 in the receiving trough 32 to the outside of the sheet route of the steel strip 1 by jetting the rinse solution 35 in the receiving trough 32. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dirt removing method and a removing device for removing dirt attached to the surface of a roll in contact with a metal plate in a processing facility for a metal plate such as a steel strip.

  Steel strips such as cold-rolled steel sheets are in a state where metal powder, other dirt, etc. are attached to oil and fats such as rolling oil, and as such, it is not possible to perform plating or coating in the next process. In processing equipment that performs continuous processing such as plating and coating on a plate, preprocessing such as degreasing and cleaning is generally performed. It is known that such dirt becomes thicker as the processing amount of the metal plate increases, and a concentrated product (dirt) accumulates on the surface of the roll in contact with the metal plate. When such a concentrated product (dirt) is deposited, the concentrated product (dirt) is transferred to the metal plate, and defects are generated.

  For example, FIG. 4 shows an alkaline degreasing line for a steel strip. In this alkaline degreasing line, an alkaline degreasing equipment 10 and a rinsing equipment 20 are installed, and the rinsing equipment 20 brushes the surface of the steel strip 1 degreased by the alkaline degreasing equipment 10 with a rinsing liquid, A backup roll 22 (upper backup roll 22A, lower backup roll 22B) arranged so as to face the brushing roll 21 across the steel strip 1 is provided. The surface of the backup roll 22 according to the processing amount of the steel strip 1 Dirt 50 is deposited on the steel strip 1, and the dirt 50 adheres to the steel strip 1, leading to deterioration in quality and yield of the steel strip 1. Further, if the backup roll is eliminated, there is a problem that the dirt removing effect is lowered.

  It is difficult to remove the dirt on the backup roll 22 without removing it from the line. In the case of the lower backup roll, however, the upper backup roll 22 is also considered a method in which an operator manually polishes the surface of the backup roll 22. It is done. However, the polishing with the roll stopped is not sufficient for removing dirt. On the other hand, the polishing with the backup roll 22 rotated is slightly improved in efficiency, but the efficiency is low. There was a risk of work such as being caught in 22.

  On the other hand, Patent Document 1 describes a technique in which dirt on a roll is removed by pressing a brush against the roll and spraying a cleaning liquid onto the portion.

JP-A-8-0477705

  However, the technique described in Patent Document 1 has a problem that dirt accumulates on the brush and the brush must be frequently replaced.

  The present invention has been made in view of the circumstances as described above, and in a processing facility for metal plates such as steel strips, appropriately removes dirt adhering to the surface of the roll in contact with the metal plates with good workability. It is an object of the present invention to apply a dirt removing method and a removing apparatus capable of performing the above.

  In order to solve the above problems, the present invention has the following features.

  [1] A dirt removing method for removing dirt adhering to the surface of a roll in contact with a metal plate, the dirt adhering to the surface of the roll being scraped off with a doctor knife, and the dirt scraped off with the doctor knife A method for removing dirt on a roll, wherein the dirt is received by a catch, and a liquid is ejected to the dirt received by the catch and is discharged out of the existing range of the metal plate.

  [2] A dirt removing device for removing dirt attached to the surface of the roll in contact with the metal plate, the doctor knife scraping off the dirt attached to the surface of the roll, and the dirt scraped off by the doctor knife. A dirt remover on a roll, characterized by comprising: a catch for catching; and a liquid ejecting means for ejecting the liquid into the receptacle and discharging the dirt in the catch outside the range where the metal plate exists. apparatus.

  In the present invention, in a processing facility for a metal plate such as a steel strip, dirt attached to the surface of the roll in contact with the metal plate can be appropriately removed with good workability.

It is a front view showing one embodiment of the present invention. It is a side view which shows one Embodiment of this invention. It is a front view showing one embodiment of the present invention. It is a figure which shows the alkaline degreasing line of a steel strip.

  An embodiment of the present invention will be described with reference to the drawings. Here, the case of removing dirt on the surface of the upper backup roll 22A in the rinse equipment 20 for the alkaline degreasing line of the steel strip shown in FIG. 4 will be described as an example.

  In this embodiment, as shown in a front view in FIG. 1 and a side view in FIG. 2, a doctor knife (doctor blade) 31 that scrapes off the dirt 50 adhering to the surface of the upper backup roll 22A, and a doctor knife 31 A receiving rod 32 that receives the dirt 50 that has been removed, and a rinse liquid that injects a portion of the rinse liquid into the receiving rod 32 and discharges the dirt 50 inside the receiving rod 32 outside the plate path of the steel strip 1 (outside the existing range). Spray means (nozzle header 33, spray nozzle 34).

  1 and 2 show a state in which the dirt 50 is scraped off by the doctor knife 31, and the dirt 50 is received and received by the hook 32. In this state, the dirt 50 received by the receiving hook 32 is accumulated. Then, as shown in the front view of FIG. 3, a part of the rinsing liquid 35 is sprayed from the spray nozzle 34 into the receiving bowl 32, and the dirt 50 in the receiving bowl 32. Is pushed out in one direction and discharged out of the plate path of the steel strip 1.

  Here, the spray nozzle 34 is an oblique spray nozzle that inclines and injects in one direction so that the dirt 50 in the receptacle 32 can be easily washed away in one direction.

  Thus, in this embodiment, in the rinsing equipment 20 for the alkaline degreasing line of the steel strip, the surface of the upper backup roll 22A can be appropriately removed with good workability.

  In the above embodiment, the rinsing liquid nozzle 33 is a two-way nozzle, one direction is jetted onto a metal band (not shown), and one direction is a part of the rinsing liquid from the doctor knife 31 into the receiving bowl 32. However, if there is no restriction on the installation space, the rinsing liquid may be sprayed from the other nozzles alone to the receiving bowl 32. In the above embodiment, the oblique spray nozzle is used to flush the dirt in the receptacle 32 in one direction. However, the present invention is not limited to this. For example, a structure for sucking dirt in the receptacle can be used. Good.

  And this invention is not limited to said embodiment, It applies when removing the dirt adhering to the surface of the roll which contacts a metal plate in the environment which can inject a liquid in the processing equipment of a metal plate can do.

DESCRIPTION OF SYMBOLS 1 Steel strip 10 Alkali degreasing apparatus 20 Rinse equipment 21 Brush roll 22 Backup roll 22A Upper backup roll 22B Lower backup roll 31 Doctor knife (doctor blade)
32 Receiving bowl 33 Nozzle header 34 Spray nozzle (rhombic type spray nozzle)
35 Rinse solution 50 Dirt

Claims (2)

  A dirt removing method for removing dirt adhered to the surface of a roll in contact with a metal plate, wherein the dirt adhered to the surface of the roll is scraped with a doctor knife, and the dirt scraped with the doctor knife is received. A method for removing dirt on a roll, characterized in that a liquid is ejected to the dirt received by the receiving bowl and discharged out of the existing range of the metal plate.   A dirt removing device for removing dirt adhered to the surface of a roll in contact with a metal plate, the doctor knife scraping off dirt adhered to the surface of the roll, and a receiver for receiving dirt scraped off by the doctor knife. An apparatus for removing dirt on a roll, comprising: a bowl; and a liquid ejecting means for ejecting liquid into the receiving bowl and discharging the dirt in the receptacle outside the range where the metal plate exists.

Images