JP2015139805A - Testing plate and usage thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a testing plate and usage thereof for evaluating a jetting state of a jet fluid jetted from a nozzle by a descaling device.SOLUTION: The descaling device is provided for removing a scale of a steel plate surface by jetting the jet fluid to the steel plate surface from the nozzle, and confirms the jetting state of the jet fluid jetted from the descaling device, by using the testing plate having a plate-like testing plate body capable of traveling on a steel plate manufacturing line when evaluating the jetting state of the jet fluid and an evaluation part fixed to the surface side and/or the reverse side of the testing plate body and evaluating the jetting state of the jet fluid collided with a surface.

Description

  The present invention relates to a test plate used in a steel plate production line and a method for using the test plate.

  Conventionally, so-called descaling has been performed in a steel plate production line in order to remove scale on the surface of a steel plate. The descaling device that performs descaling has a nozzle that can inject water, injects jet fluid (usually water) from the nozzle onto the steel plate surface, and peels off the scale on the steel plate surface by the impact force of the jetted jet fluid. (See Patent Documents 1 to 4).

JP 2000-263124 A JP 2004-216454 A JP 2005-34908 A JP 09-174137 A

  When the descaling capability of the descaling device (impact pressure of the jet fluid against the steel plate surface, etc.) is reduced, the surface properties of the steel plate are adversely affected. That is, the decrease in the descaling capability is directly connected to the poor quality of the steel sheet.

  An example of a problem that reduces the descaling capability is an ejection abnormality of an ejection fluid such as water. When the injection abnormality occurs, a portion where the scale cannot be removed occurs, and the state of the steel sheet surface becomes uneven.

  When such a problem occurs, the productivity of the steel sheet decreases, so it is preferable that such a problem can be detected as early as possible.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a test plate for evaluating an injection state of an injection fluid injected from a nozzle by a descaling device and a method of using the test plate. .

  The inventors of the present invention have made extensive studies to solve the above problems. As a result, a test comprising a plate-like test plate main body capable of traveling on a steel plate production line, and an evaluation unit which is fixed to the front side and / or the back side of the test plate main body and evaluates the jet state of the jet fluid colliding with the surface It has been found that if the plate is used, the injection state of the injection fluid injected from the descaling device can be confirmed, and the present invention has been completed. More specifically, the present invention provides the following.

  (1) A test plate for evaluating a jet state of the jet fluid in a descaling apparatus that jets jet fluid from a nozzle onto the steel plate surface to remove scale on the steel plate surface, and is capable of traveling on a steel plate production line A test plate comprising: a plate-shaped test plate main body; and an evaluation unit that is fixed to the front side and / or the back side of the test plate main body and that evaluates the jet state of the jet fluid that has collided with the surface. .

  (2) A direction that extends in the running direction of the test plate and further includes a roll guide portion arranged in parallel to both ends of the front side and / or the back side of the test plate body, and a direction orthogonal to the running direction on the surface of the test plate. When the roll guide part is viewed from above, the entire evaluation part overlaps with the roll guide part.

  (3) The test plate according to (2), wherein the roll guide portion has a plate thickness decreasing portion in which the thickness in the plate thickness direction decreases at both ends in the running direction.

  (4) The evaluation unit is plate-shaped, and further includes a guide groove on the surface of the test plate main body on which the evaluation unit slides, and the evaluation unit moves on the test plate main body along the guide groove. The test plate according to any one of (1) to (3), wherein the test plate is fixed to the test plate body.

  (5) The test plate according to any one of (1) to (4), wherein a pair of corners at the end portion in the running direction of the test plate main body is dropped.

  (6) The length in the running direction of the test plate is at least twice the distance between the rolls of the transport rolls of the steel plate production line, according to any one of (1) to (5), Test board.

  (7) The test plate according to any one of (1) to (6), wherein the evaluation unit is an aluminum plate.

  (8) With the test plate according to any one of (1) to (7) sandwiched between pinch rolls, the jet fluid is jetted onto the evaluation unit to evaluate the jet state of the jet fluid. How to use a test plate characterized by

  (9) After the injection of the jet fluid, a test plate with a weight attached to the surface of the test plate main body upstream of the pinch roll is run backward in the upstream direction of the steel plate production line, and the test is performed from the steel plate production line. The test plate with a weight attached to the surface of the test plate main body on the downstream side of the pinch roll is taken out in the downstream direction of the steel plate production line, and the test plate is taken out from the steel plate production line. A method of using the test plate according to (8), which is characterized.

  ADVANTAGE OF THE INVENTION According to this invention, the injection state of the injection fluid injected from the descaling apparatus arrange | positioned at the steel plate manufacturing line can be evaluated easily.

It is a side view which shows typically the descaling apparatus vicinity in a steel plate manufacturing line. It is a perspective view which shows typically an example of the test board of this invention. It is sectional drawing which shows a XX cross section typically. It is a schematic diagram which shows an example of the usage method of the test board of this invention. It is a figure which shows the modification of a guide groove.

  Hereinafter, embodiments of the present invention will be described. In addition, this invention is not limited to the following embodiment.

  First, a steel plate production line to which the test plate of the present invention is applied will be described. FIG. 1 is a side view schematically showing an example of the vicinity of a descaling device in a steel plate production line.

  As shown in FIG. 1, a steel plate production line 1 to which a test plate of the present invention is applied includes a pinch roll 10, a descaling device 11, and a transport roll 12. In the steel plate production line 1 shown in FIG. 1, the strip S is conveyed in the arrow direction to produce a steel plate.

  In the steel plate production line 1 shown in FIG. 1, the pinch roll 10 is a roll that is disposed at two locations with a descaling device 11 interposed therebetween. The pinch roll 10 can hold an object to be conveyed such as the strip S.

  The descaling device 11 is used to remove the scale on the surface of the strip S. The descaling device 11 has a nozzle 110 and ejects a jet fluid 111 from the nozzle 110. The ejected fluid 111 collides with the scale on the surface of the strip S. When the jet fluid 111 collides with the scale, the scale peels off and the scale is removed from the surface of the strip S. The jet fluid 111 is generally water, and the descaling device 11 normally jets high-pressure water from the nozzle 110.

  The transport roll 12 is used to transport an object transported on the steel plate production line 1 such as the strip S.

  Conventionally, even when an abnormality has occurred in the descaling device 11 and the injection state of the injection fluid 111 becomes inappropriate, the injection state of the injection fluid 111 cannot be easily confirmed. If the above confirmation cannot be made easily, the steel sheet will continue to be manufactured in a situation where a defective product is generated, and a large number of defective products will be generated, resulting in the productivity of the steel plate.

  If the test plate of the present invention is used, since the injection state of the injection fluid 111 can be easily confirmed, the above-described injection state can be frequently evaluated. As a result, the defect of the descaling apparatus 11 can be improved before a large number of defective products are generated, and a reduction in the productivity of the steel sheet due to the generation of defective products can be prevented.

  Next, the test plate of the present invention will be described. The test plate of the present invention enters the steel plate production line 1 instead of the strip S, and is used for confirming the jet state of the jet fluid 111 in the steel plate production line 1. FIG. 2 is a perspective view schematically showing an example of the test plate of the present invention. FIG. 3 is a sectional view schematically showing an XX section.

  As shown in FIGS. 2 and 3, the test plate 2 of the present invention includes a test plate main body 20, a roll guide portion 21, a guide groove 22, and an evaluation portion 23.

  The test plate main body 20 is a plate-like member that can travel on the steel plate production line 1. Further, as shown in FIG. 2, the corners 200 at the four corners of the test plate main body 20 are dropped.

  The length (L1) in the longitudinal direction (running direction) of the test plate main body 20 is not particularly limited, but in the present invention, the length (L1) is the distance between rolls (L2) of the transport roll 12 of the steel plate production line 1. 2) or more. Further, the length in the short direction of the test plate main body 20 may be set as appropriate based on the width of the steel plate manufactured by the steel plate manufacturing line 1.

  Further, in the test plate 2 shown in FIG. 2, the test plate main body 20 travels on the steel plate production line 1 so that the longitudinal direction of the test plate main body 20 is the traveling direction in the steel plate production line 1.

  The roll guide portion 21 extends in the traveling direction of the test plate main body 20 and is arranged in parallel to both ends of the front side and the back side of the test plate main body 20 in the short direction.

  As shown in FIG. 3, the thickness (T1) of the roll guide portion 21 is thicker than the thickness (T2) of the evaluation portion 23 in the thickness direction of the test plate body 20. As a result, the end surface 210 of the roll guide portion 21 in the thickness direction of the test plate 2 is located higher than the evaluation portion 23. Here, “high” means that the distance from the surface of the test plate main body 20 is long. More specifically, the front side of the test plate body 20 has a long upward distance from the surface, and the back side has a long downward distance from the surface. Moreover, in the test plate 2 shown in FIGS. 2 and 3, when the roll guide portion 21 is viewed from the direction orthogonal to the traveling direction on the surface of the test plate 2 as shown in FIG. It overlaps with 21. As described above, when the test plate 2 passes through the roll such as the pinch roll 10 in the steel plate production line 1, the roll and the end surface 210 come into contact with each other at the position where the evaluation unit 23 exists.

  As shown in FIGS. 2 and 3, the roll guide portion 21 has plate thickness decreasing portions 211 at which the thickness in the plate thickness direction (the plate thickness direction of the test plate body 20) decreases at both ends in the traveling direction.

  The roll guide portion 21 is detachable. Although the attachment / detachment method is not particularly limited, for example, a method of allowing the roll guide portion 21 to be attached to or detached from the test plate main body 20 with a screw or the like can be mentioned.

  The guide groove 22 is for fixing the evaluation unit 23 to the test plate main body 20. An evaluation unit 23 described later slides along the guide groove 22, and the evaluation unit 23 is fixed to the test plate main body 20.

  The shape of the guide groove 22 is not particularly limited. However, in the test plate 2 shown in FIGS. 2 and 3, the test plate 2 extends from the surface of the test plate body 20 in the plate thickness direction and then bends so as to face the surface. A pair of bent portions arranged so as to face each other form a guide groove 22 that latches the both ends of the evaluation portion 23.

  The evaluation unit 23 fixed to the front side of the test plate main body 20 is fixed on the test plate main body 20 by its own weight. The evaluation unit 23 fixed to the back side of the test plate main body 20 has the bent portion of the guide groove 22 hooked to both ends of the evaluation unit 23 in the plate length direction, and the evaluation unit 23 is fixed to the test plate main body 20. .

  The length and number of the guide grooves 22 are not particularly limited, and the evaluation portion 23 can be easily slid into the guide grooves 22, and the evaluation portion 23 is fixed to the test plate body 20 by the guide grooves 22 on the back side of the test plate body 20. What is necessary is just to set the length and number of the guide groove 22 suitably so that it can do. For example, in FIGS. 2 and 3, guide grooves 22 formed by a pair of bent portions are provided at both ends, but even one long guide groove 22 extending from one end to the other end of the test plate body 20 in the short direction is also used. Good.

  Further, the guide groove 22 is also detachable similarly to the roll guide portion 21. For this reason, the position of the guide groove 22 can be appropriately set according to the width of the evaluation unit 23 and the position of the descaling device 11.

  As shown in FIGS. 2 and 3, the evaluation unit 23 has a plate shape. Although the shape of the evaluation part 23 is not specifically limited, It is preferable that it is plate shape. In the test plate 2 shown in FIGS. 2 and 3, the evaluation unit 23 is fixed to both the front side and the back side of the test plate main body 20.

  The length in the short direction and the length in the longitudinal direction of the evaluation unit 23 are not particularly limited, and may be set as appropriate so that the entire ejected fluid 111 ejected from the descaling apparatus 11 collides with the evaluation unit 23. In the test plate 2 shown in FIGS. 2 and 3, the length in the longitudinal direction of the evaluation unit 23 is substantially the same as the length in the short direction of the test plate main body 20, as shown in FIGS. 2 and 3.

  Moreover, in the test plate 2 shown in FIGS. 2 and 3, as described above, the roll guide portion 21 is detachable. For this reason, when fixing the evaluation unit 23 to the test plate body 20, the evaluation unit 23 is slid into the guide groove 22 with the roll guide unit 21 removed, and the evaluation unit 23 is fixed to the test plate body 20. Can be made.

  The material of the evaluation part 23 is not specifically limited, For example, aluminum, an acryl, a steel plate with a black skin (oxide film), etc. can be used preferably. Aluminum is lightweight and easy to handle, and since the jet mark generated on the surface is clearly formed on the surface when the jet fluid 111 collides, from the viewpoint of facilitating the evaluation, the evaluation unit 23 is made of aluminum. Is preferred.

  Next, a method for using the test plate 2 of the present invention will be described with reference to FIG. 4 using an example of using the test plate 2 shown in FIGS. 2 and 3 in the steel plate production line 1 of FIG.

  FIG. 4A shows a state immediately before the test plate 2 enters the vicinity of the descaling device 11 of the steel plate production line 1. The test plate 2 runs in the direction of the white arrow.

  FIG. 4B shows a state in which the test plate 2 further travels in the direction of the white arrow from the state shown in FIG. 4A and the test plate 2 passes the pinch roll 10. The test plate 2 passes through the pinch roll 10 while bringing the end surface 210 of the roll guide portion 21 into contact with the pinch roll 10. In addition, when the test plate 2 further travels and the test plate 2 travels on the transport roll 12, the test plate 2 is also transported while the end surface 210 of the roll guide portion 21 is in contact with the transport roll 12. Travel on 12

  FIG. 4C shows a state in which the test plate 2 further travels from the state of FIG. 4B and the test plate 2 is fixed at a position where the jet fluid 111 collides with the evaluation unit 23. The test plate 2 is fixed by being sandwiched between two pinch rolls 10 at both ends in the traveling direction. As shown in FIG. 4C, in this state, the ejected fluid 111 collides with the evaluation unit 23 for a predetermined time.

  In FIG. 4 (d), in order to take out the test plate 2 after the injection of the jet fluid 111 from the steel plate production line 1, the test plate 2 is drawn in the reverse running direction (the direction toward the upstream side of the steel plate production line 1). The state of traveling in the direction of the arrow) is shown. In the usage method shown in FIG. 4, as shown in FIG. 4D, the test plate 2 is mounted in the reverse running direction with the weight W attached to the surface of the test plate body 20 upstream of the upstream pinch roll 10. To run. 4D shows a method in which the test plate 2 is run in the reverse direction and the test plate 2 is taken out from the steel plate production line 1, but the test plate 2 is run downstream of the steel plate production line 1. FIG. The test plate 2 may be taken out from the steel plate production line 1. In this case, the weight W is attached to the surface of the test plate body 20 on the downstream side of the downstream pinch roll 10.

Subsequently, the effect of the present invention will be described.
In the test plate 2 of the present invention, the evaluation unit 23 is attached to the test plate main body 20 that can travel on the steel plate production line 1. Therefore, the test plate 2 can be moved using the steel plate production line 1. For this reason, the ejection state of the ejection fluid 111 ejected from the nozzle 110 of the descaling device 11 can be evaluated easily and in a short time.

  Further, in the test plate 2 of the present invention, if the evaluation unit 23 is fixed to the back side of the test plate main body 20, the injection state of the injection fluid 111 injected from the back side can be evaluated easily and in a short time. In particular, by fixing the evaluation units 23 on the front side and the back side of the test plate main body 20, the above-described injection state on the front side and the back side can be evaluated at the same time, so that the injection state of the jet fluid 111 can be more efficiently evaluated.

  The test plate 2 shown in FIGS. 2 and 3 has the roll guide portion 21 that overlaps with the roll guide portion 21 when the roll guide portion 21 is viewed from the side of the steel plate production line 1. As shown, when the test plate 2 passes through the roll of the pinch roll 10, the end surface 210 of the roll guide portion 21 comes into contact with the pinch roll 10. As a result, the evaluation unit 23 does not come into contact with the pinch roll 10. When the surface of the evaluation unit 23 comes into contact with the pinch roll 10, the surface of the evaluation unit 23 is rolled by the pinch roll 10 when the test plate 2 is taken out from the steel plate production line 1 after the test. The sprayed jet becomes unclear. Therefore, in order to prevent contact between the surface of the evaluation part 23 and the pinch roll 10, the test plate 2 of the present invention preferably has a roll guide part 21 as shown in FIGS. The same applies when the test plate 2 travels on the transport roll 12, and the end surface 210 of the back side roll guide portion 21 contacts the transport roll 12, so that the test plate 2 travels on the transport roll 12. The back side evaluation unit 23 can be prevented from coming into contact with the transport roll 12. As described above, the roll guide portion 21 has a function of preventing contact between the roll and the evaluation portion 23.

  Further, as shown in FIGS. 2 and 3, the roll guide portion 21 preferably has plate thickness reducing portions 211 where the thickness in the plate thickness direction decreases at both ends in the running direction. By having the plate thickness reducing portion 211, the test plate 2 can easily pass when passing through a roll such as the pinch roll 10.

  In the test plate 2 shown in FIGS. 2 and 3, the evaluation unit 23 is plate-shaped, and the evaluation unit 23 is slid into the guide groove 22 of the test plate 2 so that the evaluation unit 23 is placed on the test plate main body 20. Fix it. By allowing the plate-like evaluation unit 23 to be taken in and out from the side of the test plate 2, the evaluation unit 23 can be easily attached, and the time required for evaluation can be greatly shortened.

  Also, as shown in FIGS. 2 and 3, since the guide groove 22 has a bent portion, both ends of the evaluation portion 23 in the plate length direction can be hooked on the bent portion, and also on the back side of the test plate main body 20. The evaluation unit 23 can be easily fixed.

  In the test plate 2 shown in FIGS. 2 and 3, as shown in FIG. 2, the corner portion 200 at the end of the test plate main body 20 on the running direction side is dropped. The test plate 2 meanders when traveling on the steel plate production line 1, and even if the corner portion 200 comes into contact with the parts of the steel plate production line 1, if the corner portion 200 is cut off, the test plate 2 is manufactured as a steel plate. It is possible to travel on the line 1 more smoothly. Therefore, it is preferable that the corner 200 at the end of the test plate body 20 on the running direction side is dropped. The test plate 2 shown in FIGS. 2 and 3 is assumed to be used in the method shown in FIG. 4, and after the jet fluid 111 is jetted, the test plate 2 runs in the reverse running direction. Therefore, the corners 200 at the four corners are dropped.

  The length (L1) in the running direction of the test plate 2 shown in FIGS. 2 and 3 is at least twice the distance (L2) between the rolls of the transport roll 12 of the steel plate production line 1. If the length (L1) in the traveling direction is within this range, the test plate 2 is in the steel plate production line 1 and there is almost no problem such as falling between the transport rolls 12, and the test plate 2 is stably in the steel plate production line 1. Can drive.

  In the test plate 2 shown in FIGS. 2 and 3, the evaluation unit 23 is preferably made of aluminum. If the evaluation unit 23 is made of aluminum, it is difficult to be damaged even if the jet fluid 111 collides, and it is easy to confirm the trace of the jet generated on the surface when the jet fluid 111 collides. Therefore, if the evaluation part 23 comprised from aluminum is used, evaluation of an injection state will become easy. Moreover, it is easier to check the injection state based on the injection trace when the surface of the evaluation unit 23 is a flat surface. Therefore, the evaluation unit 23 is particularly preferably an aluminum plate.

  As shown in FIG. 4, if a method of injecting the ejection fluid 111 to the evaluation unit 23 while being sandwiched between the pinch rolls 10 is employed, the test plate 2 is in the middle of the ejection fluid 111 colliding with the evaluation unit 23. Can be prevented from moving. As a result, more accurate evaluation is possible. In addition, although the method of fixing only one end with the one pinch roll 10 may be sufficient, it is more preferable to fix both ends as shown in FIG.

  In addition, as shown in FIG. 4, if the weight W is used when taking out the test plate 2 from the steel plate production line 1 after spraying the jet fluid 111 onto the test plate 2, the wet test plate 2 and the pinch roll 10 or Even in a situation where the test plate 2 is difficult to travel due to slippage with the transport roll 12, the force applied to these rolls from the test plate 2 can be increased, and the test plate 2 can be smoothly traveled.

  The test plate and the method of using the same according to the present invention are as described above. However, the above is an example, and the shape of each component may be different. For example, FIGS. 5A and 5B show a modification of the guide groove 22.

  As shown in FIG. 5A, the guide groove 22 may be formed in a recess on the surface of the test plate main body 20. Since the guide groove 22 shown in FIG. 5A also has a bent portion, the evaluation portion 23 can be easily fixed to the back side of the test plate body 20. However, in the example shown in FIG. 5A, the position of the guide groove 22 on the surface of the test plate main body 20 cannot be easily changed. In this respect, the guide groove 22 of the test plate 2 shown in FIGS. Is preferred.

  As shown in FIG. 5B, the shape of the guide groove 22 formed on the front side of the test plate body 20 and the shape of the guide groove 22 formed on the back side may be different. As described above, on the front side of the test plate main body 20, the evaluation unit 23 can be fixed on the test plate main body 20 by the weight of the evaluation unit 23, but on the back side, there is no hooking part such as a bent part. This is because the evaluation unit 23 cannot be fixed on the test plate main body 20.

DESCRIPTION OF SYMBOLS 1 Steel plate production line 10 Pinch roll 11 Descaling apparatus 110 Nozzle 111 Injection fluid 12 Conveyance roll 2 Test plate 20 Test plate main body 200 Corner | angular part 21 Roll guide part 210 End surface 211 Plate | board thickness reduction part 22 Guide groove 23 Evaluation part S Strip W Weight

Claims (9)

A test plate for evaluating a jet state of the jet fluid in a descaling device that jets jet fluid from a nozzle onto the steel plate surface to remove scale on the steel plate surface,
A plate-shaped test plate body capable of traveling on a steel plate production line;
A test plate, comprising: an evaluation unit that is fixed to the front side and / or the back side of the test plate main body and that evaluates the jet state of the jet fluid that has collided with the surface. A roll guide portion that extends in the running direction of the test plate and is arranged in parallel on both the front side and / or the back side of the test plate body;
2. The test plate according to claim 1, wherein when the roll guide portion is viewed from a direction orthogonal to the traveling direction on the surface of the test plate, the entire evaluation portion overlaps with the roll guide portion.   3. The test plate according to claim 2, wherein the roll guide portion has a plate thickness decreasing portion in which the thickness in the plate thickness direction decreases at both ends in the traveling direction. The evaluation part is plate-shaped,
The test plate main body further includes a guide groove on which the evaluation unit slides,
The test plate according to claim 1, wherein the evaluation unit moves on the test plate main body along the guide groove and is fixed to the test plate main body.   The test plate according to any one of claims 1 to 4, wherein a pair of corners at a traveling direction side end portion of the test plate main body is dropped.   The test plate according to any one of claims 1 to 5, wherein a length of the test plate in the traveling direction is at least twice a distance between rolls of a transport roll of the steel plate production line.   The test plate according to claim 1, wherein the evaluation unit is an aluminum plate.   A test characterized in that, in a state where the test plate according to any one of claims 1 to 7 is sandwiched between pinch rolls, the ejection fluid is ejected onto the evaluation section to evaluate the ejection state of the ejection fluid. How to use the board. After jetting the jet fluid, a test plate with a weight attached to the surface of the test plate main body upstream of the pinch roll is run backward in the upstream direction of the steel plate production line, and the test plate is taken out from the steel plate production line. Or
Alternatively, the test plate having a weight attached to the surface of the test plate main body downstream of the pinch roll is caused to travel in the downstream direction of the steel plate production line, and the test plate is taken out from the steel plate production line. 9. A method for using the test plate according to 8.

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