JP2008246494A - Instrument and method for detecting roll-rotation abnormality in continuous-casting facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately detect the rotation abnormality of the roll arranged in a continuous-casting facility. <P>SOLUTION: The roll-rotation abnormality detecting instrument 30 for detecting the rotation abnormality of the rolls 14 in the continuous-casting facility is provided with: a first roll abutting surface 71 for abutting on the roll 13; a second roll abutting surface 72 for abutting on the roll 14; an abutting surface energizing member 45 for energizing so as to mutually separate the first roll abutting surface 71 and the second roll abutting surface 72; and a friction force detecting mechanism 51 for detecting the friction force loaded in the direction along the passing-through direction D<SB>1</SB>to the second roll abutting surface 72. The first roll abutting surface 71 can simultaneously be abutted to the two rolls 13 set side by side, and the second roll abutting surface 72 can simultaneously be abutted to two rolls 14 set side by side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus and a method for detecting an abnormal rotation of a roll provided in a continuous casting facility.

  A continuous casting facility for producing cast slabs from molten metal includes a tundish in which molten metal is stored, a slab passage through which a slab drawn from the tundish is passed through a mold, and a slab holding an end of the slab. A dummy bar or the like to be drawn out in the passage is provided (see Patent Document 1). In the thickness direction of the slab passage, a plurality of rolls for guiding the slab are arranged side by side in the passing direction of the slab. Each roll is rotatably provided with a center axis directed in the width direction (substantially horizontal direction) of the slab as a rotation center axis. That is, the slab is pulled out in a predetermined passing direction while holding the slab in a state of being sandwiched from both sides in the thickness direction by these rolls. Each roll rotates in accordance with the movement of the slab, whereby the slab is smoothly guided.

  By the way, in the continuous casting equipment as described above, abnormal rotation of the roll may occur due to a failure of the bearing portion of the roll. In this case, even if the slab moves, the roll does not rotate, the slab is slid, and the slab may be damaged, which may adversely affect the quality of the slab. Therefore, it is necessary to periodically inspect and manage whether the roll rotates normally.

  Various devices have been proposed for detecting roll rotation abnormality (see Patent Documents 1 and 2). For example, a load cell for detecting a frictional force applied to a contact body (detection head) from a roll and a displacement meter for detecting a displacement amount (sink amount) of the contact body are provided. The structure which determines whether the roll is rotating based on a value is proposed (refer patent document 2). These devices are attached to a dummy bar, and detect the rotation state of each roll in order from the upstream side while moving in the slab passage integrally with the dummy bar.

JP 2002-178119 A Japanese Patent Laid-Open No. 4-15510

  However, it is difficult for the conventional roll rotation abnormality detection device to pass through the slab passage in an ideal posture suitable for detecting the roll rotation abnormality, and it is difficult to accurately detect the roll rotation abnormality. There was a problem. In other words, the dummy bar has a structure in which a plurality of link members are connected, and can be bent at a plurality of portions in accordance with the shape of the slab passage, but it may be twisted with respect to the passing direction. is there. In such a case, the roll rotation abnormality detection device attached to the dummy bar is tilted with respect to the passing direction and cannot properly contact the roll, so that rotation abnormality may not be detected accurately.

  The present invention has been made in view of the above points, and an object thereof is to provide a roll rotation abnormality detection device and a roll rotation abnormality detection method capable of accurately detecting a roll rotation abnormality in a continuous casting facility. To do.

  In order to solve the above problems, according to the present invention, in a continuous casting facility, provided in a dummy bar that is passed through a slab passage formed between a plurality of first rolls and a plurality of second rolls, An apparatus for detecting an abnormal rotation of the first roll and / or an abnormal rotation of the second roll, the first roll contact surface contacting the first roll, and the second roll A second roll contact surface in contact with each other, a contact surface biasing member that biases the first roll contact surface and the second roll contact surface apart from each other, and the first roll contact A first frictional force detection mechanism that detects a frictional force applied in a direction along the slab passage with respect to the contact surface, and / or along the slab passage with respect to the second roll contact surface. A second frictional force detection mechanism for detecting a frictional force applied in a different direction, One roll contact surface can simultaneously contact two adjacent first rolls, and the second roll contact surface can contact two adjacent second rolls. Thus, a roll rotation abnormality detecting device for a continuous casting facility is provided.

  The roll rotation abnormality detection device includes an apparatus main body held by the dummy bar, and a movable member provided to be movable with respect to the apparatus main body, and the first roll contact surface and the second roll contact surface. One of the roll contact surfaces may be provided on the apparatus main body, and the other may be provided on the movable member.

  The first frictional force detection mechanism or the second frictional force detection mechanism may include a load cell and a button pressing unit that presses a load button of the load cell. The load cell is provided on one of the movable member and the apparatus main body, the button pressing portion is provided on the other, and the load button and the button pressing portion are positioned opposite to each other in the direction along the slab passage. It is good also as a structure provided. Further, a gap may be formed between the load button and the button pressing portion when no frictional force is applied to the movable member.

  The first roll contact surface does not simultaneously contact three or more first rolls, and the second roll contact surface does not contact three or more second rolls. You may make it not contact | abut simultaneously.

  The first roll contact surface, the second roll contact surface, the contact surface biasing member, the first friction force detection mechanism and / or the second friction force detection mechanism. The detection unit may be provided so as to be movable between the first roll side and the second roll side with respect to the dummy bar.

  The detection unit may be provided on both sides of the dummy bar. For example, a support shaft that is movable between the first roll side and the second roll side with respect to the dummy bar is provided, and the detection units are attached to both ends of the support shaft, respectively, On the other hand, it may be movable integrally with the support shaft.

  A roll interval detection mechanism for detecting a roll interval between the first roll and the second roll, and based on a detection value of the first frictional force detection mechanism and a detection value of the roll interval detection mechanism; The rotation abnormality of the first roll is detected, or the rotation abnormality of the second roll is detected based on the detection value of the second frictional force detection mechanism and the detection value of the roll interval detection mechanism. You may make it detect.

  Further, according to the present invention, the rotation abnormality of the plurality of first rolls provided along the slab passage and / or the first roll is opposed to the first roll with the slab passage interposed therebetween in the continuous casting facility. A method for detecting a rotation abnormality of a plurality of second rolls provided at a position, wherein the first roll contact surface, the second roll contact surface, the first friction force detection mechanism, and / or A roll rotation abnormality detection device having a second frictional force detection mechanism is passed through the slab passage integrally with a dummy bar, and the two first rolls adjacent to each other on the first roll contact surface. And the second roll contact surface in contact with the two adjacent second rolls with respect to the first roll contact surface. The first frictional force detection mechanism detects the frictional force applied in the direction along the slab passage. And / or the second frictional force detection mechanism detects a frictional force applied to the second roll contact surface in a direction along the slab passage, and the first frictional force detection An abnormal rotation of the first roll is detected based on a detection value of the mechanism, and / or an abnormal rotation of the second roll is detected based on a detection value of the second frictional force detection mechanism. A roll rotation abnormality detection method for a continuous casting facility is provided.

  The first roll contact surface is not simultaneously contacted with three or more first rolls, and the second roll contact surface is not contacted with three or more second rolls. The detection by the first frictional force detection mechanism and / or the detection by the second frictional force detection mechanism may be performed in a state where they do not contact at the same time.

  The roll rotation abnormality detection device may be passed through the slab passage while being held movably between the first roll side and the second roll side with respect to the dummy bar.

  Further, based on the detection value of the first frictional force detection mechanism and the detection value of a roll interval detection mechanism that detects a roll interval between the first roll and the second roll, An abnormal rotation of the roll is detected, and / or an abnormal rotation of the second roll is detected based on the detection value of the second frictional force detection mechanism and the detection value of the roll interval detection mechanism. Also good.

  According to the present invention, the roll rotation abnormality detection device can be moved into the slab passage by bringing the first roll contact surface and the second roll contact surface into contact with the first roll and the second roll, respectively. Can be prevented from tilting. Therefore, it is possible to accurately detect the friction force by the first friction force detection mechanism, the friction force detection by the second friction force detection mechanism, etc., and accurately detect the rotation abnormality of the first roll and the rotation abnormality of the second roll. It can be detected well. For example, even when the dummy bar is about to be twisted, the roll rotation abnormality detection device is prevented from tilting with respect to the slab passage, and the first roll rotation abnormality and the second roll rotation abnormality are accurately detected. It can be detected.

Embodiments according to the present invention will be described below. As shown in FIG. 1, a continuous casting facility 1 includes a tundish 2 that stores molten steel H ₀ that is a molten metal, an injection nozzle 4 that injects molten steel H ₀ from the bottom of the tundish 2 into a mold 3 (mold), a mold A slab passage 5 through which the slab H ₁ drawn out from 3 passes, and a dummy bar 6 that holds the end of the slab H ₁ and draws it from the mold 3 to the slab passage 5 are provided.

The slab passage 5 is formed in a substantially circular arc shape so as to be directed forward (right side in FIG. 1) gradually from the lower end of the vertical path 5a to the lower side of the vertical path 5a provided substantially vertically downward from the mold 3. curved path 5b curved in, and has a horizontal passage 5c provided substantially horizontally toward the front from the front end portion of the curved path 5b, along the slab H ₁ and dummy bar 6 in slab passage 5 It is configured to pass in a predetermined passing direction D ₁ (vertical direction in the vertical path 5a, curved direction in the curved path 5b, and horizontal direction in the horizontal path 5c). Further, as shown in FIG. 2, toward the lengthwise direction of the slab H ₁ in the passing direction D _1, substantially perpendicular direction (width direction D ₂ with respect to the passing direction D ₁ in the width direction of the slab H _1, horizontally directed), while directed in a direction substantially perpendicular (thickness direction D ₃₎ in the thickness direction of the slab H ₁ against the passage direction D ₁ and the width direction D _2, passing the slab H ₁ It is like that.

On both sides in the thickness direction D ₃ of the slab passage 5, the roll group 11 (the first roll group) for guiding the slab H ₁ of the slab passage 5, the roll group 12 (second roll group) Is provided. That is, the slab passage 5 is formed between the roll groups 11 and 12. The roll group 11 is guided so as to guide the back side of the slab H ₁ (the lower surface in the horizontal path 5c), that is, the back side of the slab passage 5 (the rear side of the vertical path 5a in the vertical path 5a, The curved path 5b is provided on the outer peripheral side of the curved path 5b, and the horizontal path 5c is provided on the lower side of the horizontal path 5c. It rolls 12, to guide the (upper the surface from the horizontal path 5c) side surface of the slab H _1, i.e., the front side of the vertical passage 5a in the front side (the vertical passage 5a of the slab passage 5, the curved path 5b is provided on the inner peripheral side of the curved path 5b, and the horizontal path 5c is provided on the upper side of the horizontal path 5c.

The back side roll group 11 includes a plurality of rolls 13 (first rolls). Roll 13 is provided in a row along the passing direction D ₁ on the back side of the slab passage 5. As shown in FIG. 2, each roll 13 has a substantially cylindrical shape, and is attached in a state where the central axis 13 a faces the width direction D < _b > ₂ . Further, each roll 13 (outer peripheral surface 13b) is rotatable about a central axis 13a (rotation central axis). Both ends of each roll 13 are rotatably held by bearings (bearings) (not shown).

Note that the distance G ₁ (roll pitch, see FIG. 1) between the rotation centers of adjacent rolls 13 in the passing direction D ₁ (between the central axes 13a) is not necessarily equal, and is, for example, downstream of the slab passage 5 It is getting wider. That is, the vertical path 5a has a narrow interval, and the horizontal path 5c has a wider interval than the vertical path 5a.

The front roll group 12 includes a plurality of rolls 14 (second rolls). Roll 14 are provided in a row along the passing direction D ₁ on the front side of the slab passage 5. As shown in FIG. 2, each roll 14 has a substantially columnar shape, like the roll 13, and is attached with the central axis 14 a directed in the width direction D < _b > ₂ . That is, the back side of the roll 13 and front roll 14 are provided substantially parallel to each other, the outer peripheral surface 13b and the outer circumferential surface 14b in the roll gap (the thickness direction D ₃ between the rolls 13 and the roll 14 facing each other spacing between) has become constant in the width direction D _2. Each roll 14 (outer peripheral surface 14b) is rotatable about a central axis 14a (rotation central axis). Both ends of each roll 14 are rotatably held by bearings (not shown).

Incidentally, the front side of the roll 14, in a position facing each other across the cast strip path 5 with respect to the back side of each roll 13 in the thickness direction D _3, are provided corresponding to each one. Accordingly, the distance G ₂ (roll pitch, see FIG. 1) between the rotation centers of the adjacent rolls 14 on the front side in the passing direction D ₁ (between the center axes 14a) is not necessarily equal, for example, the slab passage 5 It is wider at the downstream side. That is, the vertical path 5a has a narrow interval, and the horizontal path 5c has a wider interval than the vertical path 5a.

Further, the back side of the roll 13 and the front side of the roll 14, when the slab H ₁ passes through the slab passage 5, respectively pushed by the back surface and the surface of the slab H _1, in a direction away from each other, move slightly It is like that. That is, the roll clearance G ₃ in a state where the slab H ₁ does not pass through the slab passage 5, than the thickness of the slab H ₁ is set to slightly smaller, when the slab H ₁ passes roll distance G ₄ of spreads in accordance with the thickness of the slab H _1, is set to be the same as the thickness of the slab H _1.

As shown in FIG. 1, the dummy bar 6 has a structure in which a plurality of link members 21 are connected in a row in the length direction (passing direction D ₁ of the slab passage 5). A connecting member 22 is provided between the ends of the link member 21. The end portion of each link member 21 and the connecting member 22 are connected to each other by a connecting shaft 23 directed in the width direction of the dummy bar 6 (width direction D ₂ of the slab passage 5). That is, each link member 21 and connecting member 22 can be individually rotated about the connecting shaft 23. With this configuration, the dummy bar 6 can be bent at a plurality of portions in the length direction. The proximal end of the dummy bar 6, the dummy bar head 25 is provided for joining the ends of the slab H _1. The thickness of the dummy bar 6 (the thickness of each link member 21 and each connecting member 22) is smaller than the roll intervals G ₃ and G ₄ .

Next, the roll rotation abnormality detection device 30 that detects the rotation abnormality of the front-side roll 14 will be described. Figure 3 shows a plan view of a roll rotation abnormality detecting device 30 (as viewed from the thickness direction D ₃ Figure), 4, viewed from the upstream side in the rear view (pass direction D ₁ of the roll rotation abnormality detecting device 30 Figure). Figure 5 shows a side view of a roll rotation abnormality detecting apparatus 30 (viewed from the width direction D _2).

As shown in FIGS. 3 and 4, the roll rotation abnormality detection device 30 includes two detection units 31 </ b> A and 31 </ b> B. The detection units 31A and 31B are provided on both sides of the dummy bar 6 in the width direction of the dummy bar 6 (width direction D ₂ of the slab passage 5). Further, the detection unit 31A and the detection unit 31B have substantially the same structure that is symmetrical with respect to each other about the dummy bar 6.

The detection units 31 </ b> A and 31 </ b> B are attached to both ends of the support shaft 32. The support shaft 32 is passed through a support hole 35 provided in one of the plurality of link members 21 with the central axis directed in the width direction of the dummy bar 6. Within the support hole 35, the support shaft 32 is slidable within a predetermined range with respect to the link member 21 in the thickness direction of the dummy bar 6 (thickness direction D ₃ of the slab passage 5), that is, The dummy bar 6 is attached so as to be movable between the back side (roll 13 side) and the front side (roll 14 side). A detection unit 31A (device main body 41 to be described later) is attached to one end of the support shaft 32, and a detection unit 31B (device main body 41) is attached to the other end. That is, each detection unit 31A, 31B is attached to the support shaft 32 so as to be slidable between the roll 13 side and the roll 14 side in the thickness direction of the dummy bar 6 with respect to the dummy bar 6. .

  Since the detection unit 31A and the detection unit 31B have substantially the same structure, only the detection unit 31A will be described in detail below. As shown in FIGS. 3 and 4, the detection unit 31 </ b> A includes an apparatus main body 41 held by the dummy bar 6 (link member 21) via the support shaft 32. The apparatus main body 41 is provided at a position adjacent to the edge of the link member 21 in the width direction of the dummy bar 6 and is fixed to the end of the support shaft 32.

A fixing member 42 fixed to the apparatus main body 41 is provided on the back side of the apparatus main body 41 (the side facing the roll 13 on the back side, the lower surface side in FIGS. 4 and 5). On the other hand, on the front side of the apparatus main body 41 (the side facing the roll 14 on the front side, the upper surface side in FIGS. 4 and 5), the thickness direction of the roll rotation abnormality detection device 30 (the thickness direction D of the slab passage 5). ₃ ), a movable member 43 is provided that is movable within a predetermined range with respect to the apparatus main body 41. Inside the apparatus main body 41, an urging member 45 that urges the movable member 43 to move to the outside (the roll 14 side) of the apparatus main body 41 in the thickness direction, and the movable member 43 in the thickness direction. A moving mechanism 46 is provided that moves the inside of the main body 41 (in the direction away from the roll 14). Further, the device main body 41 has friction applied to the movable member 43 (second roll contact surface 72 described later) in a direction along the length direction (passing direction D ₁ ) of the roll rotation abnormality detection device 30. and the friction force detection mechanism 51 for detecting a force (second frictional force detection mechanism), the roll gap detection mechanism 52A for detecting the roll gap G _4, 52B are provided.

  The fixing member 42 is formed in a substantially rectangular flat plate shape. The back surface (the lower surface in FIGS. 4 and 5) of the fixing member 42 is a first roll contact surface 71 that contacts the outer peripheral surface 13 b of the roll 13.

  The movable member 43 is formed in a substantially rectangular flat plate shape, with the front surface (upper surface in FIGS. 4 and 5) protruding from the surface of the apparatus main body 41 to the outer side (roll 14 side), and the rear surface (FIG. 4). And the lower surface side in FIG. 5 is attached in a state of being held inside the apparatus main body 41. The movable member 43 is biased by the biasing force of the biasing member 45 so as to protrude to the outside of the apparatus main body 41, but the thickness of the roll rotation abnormality detection device 30 depends on the shape inside the apparatus main body 41. The movement range in the vertical direction is restricted. Further, the movable member 43 can be slightly slid within a predetermined range with respect to the apparatus main body 41 and the moving mechanism 46 in the length direction of the roll rotation abnormality detecting device 30, but the urging member 45. Due to the elastic force, the dummy bar 6 is urged to return to the tip end side (opposite side of the dummy head 23).

  The surface of the movable member 43 is a second roll contact surface 72 that contacts the outer peripheral surface 14 b of the roll 14. In the illustrated example, the first roll contact surface 71 and the second roll contact surface 72 are provided substantially parallel to each other substantially perpendicular to the thickness direction of the roll rotation abnormality detection device 30. They are flat surfaces and are provided at positions overlapping each other when viewed from the thickness direction of the roll rotation abnormality detection device 30.

The first roll contact surface 71 and the second roll contact surface 72 are used when the dummy bar 6 and the roll rotation abnormality detection device 30 are passed through the slab passage 5 as shown in FIGS. It has become the outer peripheral surface 13b of being disposed on opposite sides in the thickness direction D ₃ roller 13, the outer peripheral surface 14b of the roll 14, as brought into contact from each slab passage 5 side. In this way, it is possible to prevent the detection unit 31A is inclined to the passage direction D _1, is passed through an ideal posture billet passage 5 will allow accurately rotation abnormality detection of roll 14 .

In addition, as shown in FIG. 5, it is desirable that the first roll contact surface 71 can simultaneously contact the two rolls 13 on the back side. It is desirable that the second roll contact surface 72 can be in contact with the two rolls 14 on the front side simultaneously. In other words, the length L ₁ of the first roll contact surface 71 in the length direction of the roll rotation abnormality detection device 30 (that is, the length in the passing direction D ₁ ) is between the rotation centers of the rolls 13 on the back side. distance G desirably is formed longer than _1, the length L ₂ of the second roll contact surface 72 in the longitudinal direction of the roll rotation abnormality detecting device 30, the distance between the rotation center of the front of the roll 14 it is preferably formed greater than G _2. If it does in this way, the 1st roll contact surface 71 is spanned over the outer peripheral surface 13b of the two rolls 13 on the back side, and the second roll contact surface 72 is connected to the outer peripheral surface 14b of the two rolls 14 on the front side. The detection unit 31 </ b> A can be stably held in a state of being spanned. That is, passage being inclined with respect to the direction D ₁ of the detection unit 31A is cast piece passage 5 (the length direction of the roll rotation abnormality detecting apparatus 30 is shifted to the passage direction D ₁₎ and the detection unit 31A is cast strip It is inclined with respect to the thickness direction D ₃ of the passage 5 (being displaced with respect to the roll rotation abnormality detecting device thickness direction thickness direction D ₃ of 30), can be more reliably prevented.

More preferably, it is desirable that the first roll contact surface 71 does not contact the back side three rolls 13 at the same time, and the second roll contact surface 72 contacts the front side three rolls 14. It is desirable not to contact at the same time. That is, the length L ₁ of the first roll contact surface 71 is shorter than twice the distance G ₁ between the rotation centers of the back-side rolls 13 (G ₁ <L ₁ <2G ₁ ). Is desirable. The length _{L 2} of the second roll contact surface 72 is a rotating twice the distance _{G 2} between the centers is shorter than _{(G 2 <L} 2 <2G ₂ on the front side of the roll 14 Is desirable. In this way, for example, even in the curved path 5b of the slab passage 5, and when the rolls 13 and 14 are misaligned in the vertical path 5a and the horizontal path 5c, the first roll contact surface 71 and The second roll contact surface 72 can be easily brought into contact with the rolls 13 and 14 reliably.

In other words, the first roll contact surface 71 is large enough to simultaneously contact the back three rolls 13, and the second roll contact surface 72 can simultaneously contact the front three rolls 14. As shown in FIG. 6, when the rolls 13 are not aligned on one plane or the rolls 14 are not aligned on one plane, the adjacent rolls 13 and 14 are There is a possibility that the one roll contact surface 71 and the second roll contact surface 72 may not be evenly contacted (a state indicated by a dotted line in FIG. 6). In this case, it is impossible to push the roll gap G ₃ to the desired roll gap G _4, also the frictional force applied to the second roll contact surface 72 can no longer be properly detected, the rotational state of the roll 14 It may be impossible to detect accurately. In addition, if the first roll contact surface 71 and the second roll contact surface 72 are too long, the first roll contact surface 71 and the second roll contact surface 72 are caught on the rolls 13 and 14. It becomes easy and it may become difficult to move the roll rotation abnormality detection apparatus 30 smoothly. On the other hand, the first roll contact surface 71 is of such a size that it does not contact the back side three rolls 13 at the same time, and the second roll contact surface 72 is simultaneously contacted with the front side three rolls 14. If the rolls 13 are not so large, even when the rolls 13 are not arranged on one plane or when the rolls 14 are not arranged on one plane, as shown by the solid line and the alternate long and short dash line in FIG. , 14, the first roll contact surface 71 and the second roll contact surface 72 can be reliably brought into contact with each other, and the roll rotation abnormality detection device 30 can be moved smoothly in the slab passage 5. become.

  Further, an alignment meter that detects the alignment of the roll 13 on the back side (an angle bar is bridged between two adjacent rolls 13 on the back side, and the inclination angle of the angle bar is detected, thereby aligning the roll 13 on the back side. For example, the dummy bar 6 may be provided between the detection units 31A and 31B. In such a case, the roll 13 with which the angle bar of the alignment meter contacts and the first roll contact It is preferable that the rolls 13 with which the surface 71 abuts are the same. If it does so, it can prevent that the detection accuracy of the roll rotation abnormality detection apparatus 30 and the detection accuracy of an alignment meter deteriorate. For this purpose, as described above, the first roll contact surface 71 preferably has a length that contacts the two rolls 13 on the back side simultaneously and does not contact the three rolls 13 simultaneously. .

As described previously, the distance G ₁ is has a different value in the upstream side and the downstream side of the slab passage 5, the length L ₁ of the first roll contact surface 71 is greatest distance G may be a longer dimension than _1, also, more preferably, it may be a shorter dimension than twice the smallest distance G _1. That is, the first roll abutment surface 71 is large enough to abut against one or two rolls 13 over the entire slab passage 5, and more preferably, simultaneously against three or more rolls 13. Any size that does not abut is acceptable. Similarly, the distance G ₂ is, but has a different value in the upstream side and the downstream side of the slab passage 5, the length L ₂ of the second roll contact surface 72 is longer than the largest distance G ₂ may be any size, also, more preferably, it may be a shorter dimension than twice the smallest distance G _2. That is, the second roll abutment surface 72 has a size that abuts against one or two rolls 14 over the entire slab passage 5, and more preferably, simultaneously against three or more rolls 14. Any size that does not abut is acceptable.

FIG. 7 shows the structure of the urging member 45 and the moving mechanism 46. The biasing member 45 is a coil spring in the illustrated example, and one end is supported inside the apparatus main body 41 and the other end is connected to the movable member 43, and between the apparatus main body 41 and the movable member 43. The roll rotation abnormality detection device 30 is held in a compressed state in the thickness direction. That is, it is provided so that an elastic force acts in the thickness direction. Further, in the illustrated example, two urging members 45 are provided on both end portions of the movable member 43 in the length direction of the roll rotation abnormality detection device 30, and two urging members 45 are provided on each end portion side. Are arranged side by side in the width direction (width direction D ₂ ) of the roll rotation abnormality detection device 30 (see FIG. 3). That is, a total of four urging members 45 are provided. In the present embodiment, the urging member 45 functions as a contact surface urging member that urges the first roll contact surface 71 and the second roll contact surface 72 to be separated from each other.

  The moving mechanism 46 is a hydraulic cylinder mechanism in the illustrated example, and includes a cylinder body 46a and a piston rod 46b. The cylinder body 46 a is fixed with respect to the inside of the apparatus body 41. The piston rod 46 b is slidably attached to the apparatus main body 41 along the thickness direction of the roll interval detection device 30. The tip of the piston rod 46 b is attached to the movable member 43. That is, the movable member 43 is moved in the thickness direction with respect to the apparatus main body 41 by extending and contracting the piston rod 46b by driving the cylinder main body 46a. The driving of the cylinder body 46a is controlled by the control unit 101 described later. In the illustrated example, two moving mechanisms 46 are provided side by side in the length direction of the roll rotation abnormality detection device 30. In the present embodiment, the moving mechanism 46 functions as an abutting surface moving mechanism that applies power to bring the first roll abutting surface 71 and the second roll abutting surface 72 closer to each other.

  The frictional force detection mechanism 51 is provided on the dummy bar head 25 side of the movable member 43. As shown in FIG. 8, the frictional force detection mechanism 51 includes a load cell 81 that detects the applied pressure (load) as a voltage value, and a button pressing portion 82 that presses the load button 81 a of the load cell 81. The load cell 81 is provided inside the apparatus main body 41, and is provided with the load button 81a facing the movable member 43 (the end of the movable member 43 on the dummy bar head 25 side). On the other hand, the button pressing portion 82 is provided in a notch formed at the end of the movable member 43 on the dummy bar head 25 side. The load button 81 a and the button pressing portion 82 are provided so as to face each other in the length direction of the roll rotation abnormality detection device 30. The detection value of the load cell 81 is transmitted to the data processing unit 102 described later.

  In the state where no external force is applied to the movable member 43 (that is, the state where no frictional force is applied to the second roll contact surface 72), the length direction of the roll rotation abnormality detection device 30 is determined. In this case, a gap 83 (clearance) having a predetermined interval may be formed between the load button 81 a and the button pressing portion 82. If it does in this way, it can control that excessive pressurizing pressure is applied to load button 81a, and it can prevent that load cell 81 fails. Further, the state in which the movable member 43 has not moved in the length direction with respect to the apparatus main body 41 and the state in which the movable member 43 has moved (that is, whether the roll 14 has been rotated) can be clearly discriminated. The size of the gap 83 may be, for example, about 3 mm in the length direction of the roll rotation abnormality detection device 30.

  As shown in FIG. 3, the roll interval detection mechanisms 52 </ b> A and 52 </ b> B are provided at positions adjacent to the fixed member 42 and the movable member 43 in the width direction of the roll rotation abnormality detection device 30. Further, the roll rotation abnormality detection device 30 is provided side by side in the length direction.

  As the roll interval detection mechanisms 52A and 52B, a known interval detection mechanism can be used. In the example illustrated in FIG. 9, the roll interval detection mechanisms 52 </ b> A and 52 </ b> B include a first contact body 91 that contacts the outer peripheral surface 13 b of the back-side roll 13 and a first contact body 91 that contacts the outer peripheral surface 14 b of the front-side roll 14. The second contact body 92 and a displacement meter 93 for measuring the displacement amount of the first contact body 91 relative to the apparatus main body 41 and the displacement amount of the second contact body 92 relative to the apparatus main body 41 are provided.

  The first contact body 91 is provided on the back side of the apparatus main body 41, and the top portion (the lower end portion in FIG. 9) protrudes outside (the roll 13 side) from the first roll contact surface 71. The base (upper end in FIG. 9) is attached in a state of being held inside the apparatus main body 41. Inside the apparatus main body 41, a first contact body urging member 95 that urges the first contact body 91 to move to the outside of the apparatus main body 41 in the thickness direction is provided. In the illustrated example, the first contact body urging member 95 is a coil spring, and is held in a compressed state between the displacement meter 93 and the first contact body 91. The first contact body 91 is urged by the first contact body urging member 95 so as to protrude to the outside (the roll 13 side) of the apparatus main body 41. The movement range in the thickness direction of the roll rotation abnormality detection device 30 is restricted.

  The second contact body 92 is provided on the front side of the apparatus main body 41, and the top portion (upper end portion in FIG. 9) protrudes outside (the roll 14 side) from the second roll contact surface 52. The base (lower end in FIG. 9) is attached in a state of being held inside the apparatus main body 41. In addition, a second contact body urging member 96 that urges the second contact body 92 to move to the outside of the apparatus body 41 in the thickness direction is provided inside the apparatus body 41. In the illustrated example, the second contact body urging member 96 is a coil spring, and is held in a compressed state between the displacement meter 93 and the second contact body 92. The second contact body urging member 96 urges the second contact body 92 so as to protrude to the outside (the roll 14 side) of the apparatus main body 41. The movement range in the thickness direction of the roll rotation abnormality detection device 30 is restricted.

  The displacement meter 93 can measure the amount of displacement of the first contact body 91 in the thickness direction relative to the apparatus main body 41 and the amount of displacement of the second contact body 92 in the thickness direction relative to the apparatus main body 41. The detection value of the displacement meter 93 is transmitted to the data processing unit 102 described later.

  The apparatus main body 41, the fixed member 42, the movable member 43, the frictional force detection mechanism 51, the roll interval detection mechanisms 52A, 52B, and the like as described above are also provided in the other detection unit 31B, which is substantially the same as the detection unit 31A. Are configured identically.

  Further, as shown in FIG. 3, the roll rotation abnormality detection device 30 is provided in the control unit 101 that controls the moving mechanism 46 provided in each of the detection units 31A and 31B, and in each of the detection units 31A and 31B. The load cell 81 and the data processing unit 102 for processing the data of the displacement meter 93 are provided. Further, a battery 103 that supplies a voltage to the control unit 101 and a battery 104 that supplies a voltage to the data processing unit 102 are provided.

  In the illustrated example, the control unit 101 and the data processing unit 102 are connected to the link member 21 adjacent to the distal end side of the dummy bar 6 with respect to the link member 21 to which the detection units 31A and 31B and the support shaft 32 are attached. It is attached. Further, the control unit 101 and the data processing unit 102 are provided at positions facing each other across the link member 21. On the other hand, the batteries 103 and 104 are attached to the link member 21 adjacent to the distal end side of the dummy bar 6 with respect to the link member 21 to which the control unit 101 and the data processing unit 102 are attached. Moreover, it is provided in the position which mutually opposes on both sides of the link member 21.

  The data processing unit 102 is electrically connected to the detection units 31A and 31B via wiring or the like, and is a load cell detected when the roll rotation abnormality detection device 30 passes between the rolls 13 and 14. The detection value 81, the detection value of the roll interval detection mechanism 52A, and the detection value of the roll interval detection mechanism 52B are recorded.

Next, the operation of the continuous casting equipment 1 configured as described above and the roll rotation abnormality detection device 30 will be described. First, in the continuous casting facility 1 before the start of continuous casting, the tundish 2 and the injection nozzle 4 are removed from the mold 3, and the dummy bar 6 provided with the roll rotation abnormality detection device 30 is moved using a moving device (not shown). The dummy bar 6 is inserted into the slab passage 5 through the mold 3 from the tip portion. The dummy bar 6 (roll rotation abnormality detection device 30) has a length direction, a width direction, and a thickness direction of the dummy bar 6 (roll rotation abnormality detection device 30) in the passage direction D ₁ , width direction D ₂ , and slab passage 5 respectively. It is inserted into the billet passage 5 in a state to match the thickness direction D _3.

When the dummy bar 6 is inserted into the mold 3, the roll rotation abnormality detection device 30 drives the moving mechanism 46 of each of the inspection units 31 </ b> A and 31 </ b> B under the control of the control unit 101, and moves the movable member 43 to the device main body 41 side. To the state of being pulled into That is, in a state where the moving mechanism 46 is not driven, the movable member 43 protrudes from the apparatus main body 41 due to the elastic force of the biasing member 45, and the second roll extends from the first roll contact surface 71. The thickness up to the contact surface 72 is a dimension that is difficult to pass through the mold 3 and the slab passage 5 (a value larger than the roll intervals G ₃ and G ₄ ). Therefore, by driving the moving mechanism 46, the movable member 43 is pulled into the apparatus main body 41 against the elastic force of the biasing member 45, so that the first roll contact surface 71 and the second roll contact surface. The thickness up to 72 is reduced to make it easy to pass through the mold 3. When the roll rotation abnormality detection device 30 passes through the mold 3 and is introduced into the slab passage 5, the driving of the moving mechanism 46 is stopped. Then, by the elastic force of the urging member 45 protrudes movable member 43 from the apparatus main body 41, the first roll contact surface 71 is pressed against the thickness direction D ₃ with respect to the roll 13, second roll abutment surface 72 is in a state of being pressed in the thickness direction D ₃ with respect to the roll 14.

In this way, the dummy bar 6 and the roll rotation abnormality detection device 30 are inserted into the slab passage 5, the base end portion (dummy bar head 25) of the dummy bar 6 is placed in the mold 3, and the dummy bar 6 is stationary. Next, the tundish 2 and the injection nozzle 4 are connected to the mold 3, and molten steel H ₀ is supplied into the tundish 2. Then, through the injection nozzle from the tundish 2, injecting molten steel H ₀ to the mold 3, the molten steel H ₀ and cooled in the mold 3, to solidify. Thus, the ends of the slab H ₁ is formed on the dummy bar head 25.

Next, the mobile device (not shown) the dummy bar 6, along a passage direction D _1, is moved toward the downstream side from the upstream side of the slab passage 5. Then, the slab H ₁ is pulled by the dummy bar head 25 and pulled out into the slab passage 5. The slab H ₁ drawn out to the slab passage 5 passes through the slab passage 5 as the dummy bar 6 moves and is further cooled. In slab passage 5, dummy bar 6 and slab H ₁ while being guided by the rolls 13 and the front side of each roll 14 of the rear side, moves to the downstream side along the predetermined pass direction D _1. Each roll 13 of the back side, with the movement of the slab H _1, rotated respectively in a predetermined rotational direction D _4, the front side of the roll 14, with the movement of the slab H _1, a predetermined rotational direction D ₅ are rotated respectively (opposite to the rotational direction _{D 4} of the roll 13). Thus, while solidifying the molten steel H ₀ in the mold 3, by pulling out the slab H ₁ by the dummy bar 6 continuously, it is possible to cast the slab H ₁ narrow flat.

By the way, while forming the slab H ₁ as described above, the roll rotation abnormality detection device 30 moves in the slab passage 5 together with the dummy bar 6. And based on the detected value of the frictional force detection mechanism 51 provided in each detection unit 31A, 31B, the rotation state of each roll 14 of a front side can be test | inspected. Each roll distance detection mechanism 52A, the detection value of the 52B, it is possible to check the roll gap _{G 4.}

The detection unit 31A brings the first roll contact surface 71 into contact with the outer peripheral surface 13b of the back-side roll 13, and makes contact with the second roll contact surface 72 against the outer peripheral surface 14b of the front-side roll 14. while contact, moves to the pass direction D _1. The detection unit 31B is placed on the outer peripheral surface 13b of the same roll 13 as the roll 13 with which the first roll contact surface 71 of the detection unit 31A is in contact with the detection unit 31A across the dummy bar 6. The first roll contact surface 71 is brought into contact with the second roll contact surface 72 of the detection unit 31A, and the second roll is in contact with the outer peripheral surface 14b of the same roll 14 as the roll 14 in contact. while abutting the abutment surface 72, integrally with the detection unit 31A, it moved in the passing direction D ₁ (see FIG. 4).

As described above, in each of the detection units 31A and 31B, the first roll contact surface 71 and the second roll contact surface 72 are separated from each other by the urging force of the urging member 45, and the rolls 13 and 14 are separated. It brought into contact so as to be pressed in the thickness direction D ₃ respectively. The rolls 13 and 14 are pushed and moved slightly by the first roll contact surface 71 and the second roll contact surface 72 in a direction away from each other. That is, the roll gap is widened to the roll gap G ₄ when the slab H ₁ passes. Thus, by providing the same pressure and the pressing pressure applied from slab H ₁ when cast slab H ₁ relative to rollers 13 and 14 passes, the rotation of the roll 14 when the slab H ₁ passes The state can be detected appropriately. In addition, the first roll contact surface 71 and the second roll contact surface 72 are brought into contact with the rolls 13 and 14, respectively, so that the detection units 31A and 31B can be reliably placed between the rolls 13 and 14, respectively. can be held in each of the detection units 31A, the posture of the 31B can be prevented from being displaced relative to the passing direction D _1.

When each detection unit 31A, 31B passes between a pair of rolls 13 and 14 facing each other and moves from the upstream side to the downstream side of the rolls 13, 14, the back side roll 13 is shown in FIG. as shown, each of the detecting units 31A, so as to follow the movement of the first roll contact surface 71 of the 31B, it rotates in the rotational direction D _4. Front side of the roll 14, if ready to rotate normally, the detection unit 31A, so as to follow the movement of the second roll contact surface 72 of the 31B, rotates in the rotational direction D _5. That is, the frictional force acting between the second roll contact surface 72 and the outer peripheral surface 14b of the front roll 14 is a very small value, and the second roll contact surface 72 (movable member 43) is In the passage direction D _1, it is hardly moved with respect to the apparatus main body 41. Therefore, the button pressing portion 82 remains separated from the load button 81a (the state indicated by the alternate long and short dash line in FIG. 8), and no pressure is detected in the load cell 81. Or even if the button press part 82 contacts the load button 81a, the applied pressure detected in the load cell 81 is a very small value.

On the other hand, if the front-side roll 14 is in a state where it cannot rotate normally (rotation abnormal state), the roll 14 in the rotation abnormal state cannot smoothly follow the movement of the second roll contact surface 72, a non-rotating state in a predetermined rotational direction D _5, or the rotational speed is slow state. In this case, the frictional force acting between the second roll contact surface 72 and the outer peripheral surface 14b of the roll 14 becomes stronger than in the normal rotation state. Therefore, the second roll contact surface 72 (movable member 43), the passing direction D ₁ with respect to the apparatus main body 41 in the opposite direction, is moved against the elastic force of the biasing member 45. Then, the load button 81a is pressed by the button pressing portion 82 (a state indicated by a two-dot chain line in FIG. 8), and a pressure (voltage value higher than a predetermined reference value) is detected in the load cell 81.

  When the roll interval detection mechanisms 52A and 52B of the detection units 31A and 31B pass between the roll 13 and the roll 14 facing each other, as shown in FIG. It is pushed by the outer peripheral surface 13 b of the roll 13 and pushed into the apparatus main body 41 side against the elastic force of the first contact body urging member 95. The second contact body 92 is pushed by the outer peripheral surface 14 b of the front-side roll 14, and is pushed into the apparatus main body 41 side against the elastic force of the second contact body urging member 96. Thus, the displacement amount of the first contact body 91 and the displacement amount of the second contact body 92 given by the rolls 13 and 14 are detected by the displacement meter 93 and transmitted to the data processing unit 102.

As described above, when the detection is performed by the frictional force detection mechanism 51 and the roll interval detection mechanisms 52A and 52B, the detection units 31A and 31B have the first roll contact surface 71 and the second roll contact surface as described above. Each of the contact surfaces 72 is held in an ideal posture. That is, the friction force applied to the second roll contact surface 72 in the direction along the passing direction D ₁ can be appropriately detected by the load cell 81. The first contact member 91, the second contact member 92 can be displaced along the thickness direction D _3, respectively, the amount of displacement of the first contact member 91 in the thickness direction D _3, the second The displacement amount of the contact body 92 can be detected appropriately.

In particular, the length L ₁ of the first roll contact surface 71 is formed longer than the distance G ₁ , and the first roll contact surface 71 is simultaneously formed with respect to the two adjacent rolls 13 on the back side. It can abut (see FIG. 5). In this case, the first roll contact surface 71, while being maintained in a vertical position (posture parallel to the passage direction D ₁₎ to the thickness direction D _3, from the upstream side of the roll 13 on the downstream side It is smoothly transferred to the roll 13. Further, the length L ₂ of the second roll contact surface 72 is formed to be longer than the distance G ₂ , and the second roll contact surface 72 is simultaneously formed with respect to the adjacent two rolls 14 on the front side. Can abut. In this case, the second roll contact surface 72, while being maintained in a vertical position with respect to the thickness direction D _3, from the upstream side of the roll 14 to the roll 14 on the downstream side, is smoothly passed. As described above, the first roll contact surface 71 is simultaneously contacted with the two rolls 13 on the back side, and the second roll contact surface 72 is simultaneously contacted with the two rolls 14 on the front side. By passing each detection unit 31A, 31B through the slab passage 5 while making contact, the roll rotation abnormality detection device 30 can be held in a more stable state. That is, that the detection unit 31A, 31B is inclined to the passage direction _{D 1} and the thickness direction _{D 3,} can be prevented more reliably.

When the first contact body 91 and the second contact body 92 are in contact with the rolls 13 and 14, respectively, the displacement amount of the first contact body 91 and the displacement amount of the second contact body 92 are detected. The first roll contact surface 71 is always in contact with the two rolls 13 and the second roll contact surface 72 is always in contact with the two rolls 14 (see FIG. 10). if, roll distance detection mechanism 52A, 52B can be reliably prevented from tilting with respect to the thickness direction D _3, displacement of the first contact member 91 in the thickness direction D _3, the second contact member 92 The displacement amount can be detected with high accuracy.

Further, the dummy bar 6 (link member 21), even if is to become a posture twisted to the passage direction D _1, the first roll contact surface 71, the second roll contact surface 72 of each roll 13 and 14 be to abut against, it is possible to suppress the orientation of the roll rotation abnormality detecting device 30 is twisted relative to the passing direction D _1. Furthermore, in the present embodiment, even when the link member 21 moves toward the roll 13 or the roll side 14, the support shaft 32 and the detection units 31 </ b> A and 31 </ b> B are relatively positioned with respect to the link member 21 in the thickness direction. it can be moved to the D _3. Thereby, it is possible to maintain the pressure applied to each roll 13, 14 from each detection unit 31 </ b> A, 31 </ b> B at an appropriate value, and to smoothly move each detection unit 31 </ b> A, 31 </ b> B in the slab passage 5. Can be moved. That is, the influence of the play of the dummy bar 6 on the roll rotation abnormality detection device 30 and the rolls 13 and 14 can be reduced by sliding the support shaft 32.

  For example, as shown in FIG. 11, when the link member 21 tries to move away from the back side roll 13 and move to the front side roll 14 side, the support shaft 32 and the detection units 31 </ b> A and 31 </ b> B are relative to the link member 21. Accordingly, the first roll contact surface 71 of each detection unit 31A, 31B is separated from the back roll 13 by moving toward the back roll 13 side (from the first roll contact surface 71 to the back side). And the pressure applied to the front roll 14 from the second roll contact surface 72 of each detection unit 31A, 31B becomes excessively strong. Can be prevented. When the link member 21 moves away from the front roll 14 and moves to the back roll 13, the support shaft 32 and the detection units 31 </ b> A and 31 </ b> B are relatively on the front roll 14 side with respect to the link member 21. The pressure applied to the roll 13 on the back side from the first roll contact surface 71 of each of the detection units 31A and 31B becomes stronger, and the second of each of the detection units 31A and 31B. It is possible to prevent the pressure applied from the roll contact surface 72 to the front roll 14 from becoming weak.

Further, detection units 31A and 31B are provided on both sides of the link member 21, and the first roll contact surfaces 71 are brought into contact with one roll 13 on both sides of the link member 21, respectively. 14, each of the detection units 31A and 31B can be supported in a more balanced manner by bringing the second roll contact surfaces 72 into contact with each other on both sides of the link member 21. Further, the roll rotation abnormality detecting device 30 is inclined with respect to the width direction D ₂ can also be effectively prevented.

Thus, the roll rotation abnormality detecting device 30, the friction force detection mechanism 51, the roll gap detection mechanism 52A, and moves in the passing direction _{D 1} while performing detection by 52B, the data processing unit 102, the detection unit 31A, 31B , The detected value of the load cell 81 and the detected value of the displacement meter 93 are recorded. Based on the detected value of the load cell 81 recorded in the data processing unit 102, it can be determined whether or not each roll 14 rotates normally. That is, when the roll rotation abnormality detection device 30 passes between the pair of rolls 13 and 14, if the voltage is not detected by the load cell 81 (or the detected voltage is small), the second roll It can be determined that no frictional force acts on the contact surface 72 and the movable member 43 has not moved relative to the apparatus main body 41, that is, the roll 14 has rotated normally. On the other hand, when a voltage equal to or higher than a predetermined reference value is detected by the load cell 81, a frictional force acts on the second roll contact surface 72 and the movable member 43 moves relative to the apparatus main body 41. That is, the roll 14 Can be judged to have not rotated normally.

As described above, according to the roll rotation abnormality detection device 30, the first roll contact surface 71 is reliably brought into contact with the back roll 13, and the second roll contact surface 72 is It can be surely brought into contact with the roll 14 on the front side. Thereby, it is possible to prevent the roll rotation abnormality detection device 30 from being inclined with respect to the passing direction D ₁ (slab passage 5), and to allow the roll rotation abnormality detection device 30 to pass through the slab passage 5 in an ideal posture. rotation abnormality of the roll 14, the roll gap G ₄ and the like can be detected accurately. In particular, the detection units 31A and 31B are held in a state where the first roll contact surface 71 is bridged between the two rolls 13 and the second roll contact surface 72 is bridged between the two rolls 14. , that the roll rotation abnormality detecting device 30 is inclined to the passage direction D _1, it can be more reliably prevented. For example, even if the dummy bar 6 is to become a twisted posture, to prevent the roll rotation abnormality detecting device 30 is inclined to the passage direction D _1, the rotation of the roll 14 abnormalities, accurately detected roll gap G _4, etc. it can.

  As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this example. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

  For example, in the above embodiment, the roll rotation abnormality detection device 30 includes the two detection units 31A and 31B. However, the number of detection units is not limited to two, and may be one, for example. Also in this case, the roll rotation abnormality detection device 30 is brought into contact with the rolls 13 and 14 by bringing the first roll contact surface 71 and the second roll contact surface 72 into contact with the rolls 13 and 14, respectively. Inclination can be suitably prevented. However, if the two detection units 31A and 31B are provided on both sides of the dummy bar 6 as in the above embodiment, the balance is improved and the roll rotation abnormality detection device 30 is held in a more stable state. It is possible.

  Also, the arrangement and number of fixed members 42, movable members 43, urging members 45, moving mechanisms 46, frictional force detecting mechanisms 51, roll interval detecting mechanisms 52A, 52B, etc. provided in the detecting units 31A, 31B are also included. The present invention is not limited to those shown in the above embodiments. For example, one roll interval detection mechanism may be provided for each of the detection units 31A and 31B.

  In the above embodiment, the apparatus main body 41 is provided with the load cell 81 and the movable member 43 is provided with the button pressing portion 82. However, of course, the apparatus main body 41 is provided with the button pressing portion 82 and the movable member 43 is provided with the load cell 81. It is good also as a structure which provided.

  Further, in the above embodiment, the gap 83 is provided between the load button 81a and the button pressing portion 82, but the gap 83 is not necessarily provided. Also in this case, it is possible to detect an abnormal rotation of the roll. That is, for example, when the detection value of the load cell 81 is low, it can be determined that the friction force applied to the second roll contact surface 14 is small and the roll 14 is normally rotated. Further, when the detection value of the load cell 81 is high, it can be determined that the friction force applied to the second roll contact surface 14 is large and the roll 14 does not rotate normally.

  In the above embodiment, the method for determining the rotation state of the roll 14 only from the detection value of the friction force detection mechanism 51 has been described. However, the detection value of the friction force detection mechanism 51 and the detection of the roll interval detection mechanisms 52A and 52B. The rotation state of the roll 14 may be determined based on the value. For example, the relationship (change characteristic) between the detected value of the load cell 81 and the detected value of the displacement meter 93 obtained when the roll 14 normally rotates, and the detected value of the load cell 81 obtained when the roll 14 does not rotate. The relationship with the detected value of the displacement meter 93 is investigated in advance, and this relationship is stored in the data processing unit 102, for example. Then, by comparing the relationship between the detected value of the load cell 81 and the detected value of the displacement meter 93, the data processing unit 102 determines whether or not the roll 14 is rotating normally. May be determined automatically.

  In the above embodiment, the movable member 43 and the frictional force detection mechanism 51 (second frictional force detection mechanism) are provided on the front side of the apparatus main body 41 to detect only the rotation abnormality of the roll 14 on the front side. A frictional force detection mechanism (first frictional force detection mechanism) for detecting a frictional force applied to the movable member and the first roll contact surface 71 is provided on the back side of the apparatus main body 41, and a detection value of the frictional force detection mechanism is provided. Based on the above, it may be configured to detect abnormal rotation of the roll 13 on the back side. Further, both the first friction force detection mechanism and the second friction force detection mechanism may be provided so that the rotation abnormality of the back-side roll 13 and the rotation abnormality of the front-side roll 14 can be detected simultaneously.

For example, as shown in FIG. 12, a movable member 111 may be provided instead of the fixed member 42, and the back surface of the movable member 111 may be a first roll contact surface 71. Further, the urging member 112 for projecting the movable member 111 toward the outside of the apparatus main body 41 (back side of the roll 13) and the movable member 43 are separated from the inner side of the apparatus main body 41 (from the back side roll 13) in the thickness direction. moving mechanism 113 which moves in the direction), the first roll contact surface 71 the friction force detection mechanism 114 for detecting the friction force exerted in a direction along the passing direction D ₁ with respect to (the first frictional force detection mechanism) Etc. may be provided. As the urging member 112, the moving mechanism 113, and the frictional force detecting mechanism 114, for example, the same configuration as that of the urging member 45, the moving mechanism 46, and the frictional force detecting mechanism 51 described in the above embodiments is used. Can do. With such a configuration, the rotational state of the back-side roll 13 can be detected as well as the rotational state of the front-side roll 14. That is, when the frictional force is not detected in the load cell 81 of the frictional force detection mechanism 114 (or the detected frictional force is small), the roll 13 on the back side can be rotated normally, and the load cell 81 of the frictional force detection mechanism 114 When the frictional force is detected (or the detected frictional force is large), it can be determined that the roll 13 on the back side cannot normally rotate. Also in this case, the first roll contact surface 71 against the rollers 13 and 14, by abutting the second roll contact surface 72, respectively, the roll rotation abnormality detecting device 30 is in the passing direction D ₁ While preventing tilting, the detection of the frictional force by the first frictional force detection mechanism 114, the detection of the frictional force by the second frictional force detection mechanism 51, etc. are accurately performed, and the rotation abnormality of the rolls 13 and 14 is detected. Can be detected with high accuracy.

  In the above embodiment, the slab passage 5 is a passage having a vertical path 5a, a curved path 5b, and a horizontal path 5c (vertical bending mold), but the configuration of the slab path 5 is not limited to this, For example, a path (curved type) that does not include the vertical path 5a but includes the curved path 5b and the horizontal path 5c, a path that includes only the vertical path 5a (vertical type), and the like may be used. Even in such a slab passage, according to the roll rotation abnormality detection device 30 according to the present embodiment, it is possible to accurately detect a roll rotation abnormality.

  The present invention can be applied to, for example, an apparatus and method for detecting abnormal rotation of a roll provided in a continuous casting facility.

It is explanatory drawing explaining the structure of a continuous casting installation. It is a cross-sectional view of a slab passage. It is a top view of a roll rotation abnormality detection apparatus. It is a rear view of a roll rotation abnormality detection apparatus. It is the side view which showed the roll rotation abnormality detection apparatus at the time of passing a slab passage, and the state of each roll. It is explanatory drawing explaining the relationship between the position of a roll, the magnitude | size of a 1st roll contact surface, the magnitude | size of a 2nd roll contact surface, and the state of a roll rotation abnormality detection apparatus. It is a longitudinal cross-sectional view by the II line in FIG. It is the longitudinal cross-sectional view which expanded and showed the frictional force detection mechanism. It is a longitudinal cross-sectional view by the II-II line in FIG. It is the side view which showed the state in which a roll space | interval detection mechanism passes between rolls. It is the side view which showed the state of the roll rotation abnormality detection apparatus in the state in which the dummy bar was twisted. It is a longitudinal cross-sectional view of the roll rotation abnormality detection apparatus concerning another embodiment.

Explanation of symbols

D ₁ Direction of passage of slab passage D ₂ Width direction of slab passage D ₃ Thickness direction of slab passage D ₄ Direction of rotation of roll on back side D ₅ Direction of rotation of roll on front side G ₁ Between rotation centers of rolls on back side Distance (roll pitch)
The distance between the rotation center of the G ₂ front rolls (roll pitch)
G ₃ roll distance (when the slab has not passed)
G ₄ roll distance (when the slab passes)
L ₁ Length of first roll contact surface L ₂ Length of second roll contact surface 1 Continuous casting equipment 5 Slab passage 6 Dummy bar 13 Back side roll (first roll)
14 Front roll (second roll)
30 Roll Rotation Abnormality Detection Device 31A, 31B Detection Unit 32 Support Shaft 41 Device Main Body 43 Movable Member 45 Biasing Member (Abutting Surface Biasing Member)
51 Friction force detection mechanism (second friction force detection mechanism)
52A, 52B Roll interval detection mechanism 71 First roll contact surface 72 Second roll contact surface 81 Load cell 82 Button pressing portion

Claims (13)

In a continuous casting facility, provided in a dummy bar that is passed through a slab passage formed between a plurality of first rolls and a plurality of second rolls, the rotation abnormality of the first roll and / or the second An apparatus for detecting abnormal rotation of a roll of
A first roll contact surface that contacts the first roll; a second roll contact surface that contacts the second roll; the first roll contact surface and the second roll contact An abutting surface urging member that urges the surfaces to be separated from each other, and a first frictional force that detects a frictional force applied in a direction along the slab path to the first roll abutting surface A detection mechanism and / or a second frictional force detection mechanism for detecting a frictional force applied to the second roll contact surface in a direction along the slab passage,
The first roll contact surface is capable of simultaneously contacting two adjacent first rolls,
The roll rotation abnormality detecting device for continuous casting equipment, wherein the second roll contact surface is capable of simultaneously contacting two adjacent second rolls. An apparatus main body held by the dummy bar, and a movable member provided to be movable with respect to the apparatus main body,
2. The continuous according to claim 1, wherein one of the first roll contact surface and the second roll contact surface is provided on the apparatus main body, and the other is provided on the movable member. Roll rotation abnormality detection device for casting equipment. The first frictional force detection mechanism or the second frictional force detection mechanism includes a load cell and a button pressing portion that presses a load button of the load cell,
The load cell is provided on one of the movable member and the apparatus main body, and the button pressing portion is provided on the other,
The roll rotation abnormality detection device for continuous casting equipment according to claim 2, wherein the load button and the button pressing portion are provided at positions facing each other in a direction along the slab passage. The roll rotation abnormality of the continuous casting equipment according to claim 3, wherein a gap is formed between the load button and the button pressing portion in a state in which no frictional force is applied to the movable member. Detection device. The first roll contact surface does not contact three or more first rolls simultaneously,
The roll rotation abnormality of the continuous casting equipment according to any one of claims 1 to 4, wherein the second roll contact surface does not contact three or more second rolls simultaneously. Detection device. The first roll contact surface, the second roll contact surface, the contact surface biasing member, the first friction force detection mechanism and / or the second friction force detection mechanism. Comprising a detection unit having
6. The continuous unit according to claim 1, wherein the detection unit is attached to the dummy bar so as to be movable between the first roll side and the second roll side. Roll rotation abnormality detection device for casting equipment. The roll rotation abnormality detection device for continuous casting equipment according to claim 6, wherein the detection units are provided on both sides of the dummy bar. A support shaft movable between the first roll side and the second roll side with respect to the dummy bar;
The roll of the continuous casting equipment according to claim 6 or 7, wherein the detection units are respectively attached to both ends of the support shaft so as to be movable integrally with the support shaft with respect to the dummy bar. Rotation abnormality detection device. A roll interval detection mechanism for detecting a roll interval between the first roll and the second roll;
Based on the detection value of the first frictional force detection mechanism and the detection value of the roll interval detection mechanism, the rotation abnormality of the first roll is detected, or the detection value of the second frictional force detection mechanism The rotation abnormality detection of the continuous casting equipment according to any one of claims 1 to 8, wherein the rotation abnormality of the second roll is detected based on the detected value of the roll interval detection mechanism. apparatus. Rotation abnormality of a plurality of first rolls provided along a slab passage in a continuous casting facility and / or a plurality of first rolls provided at positions facing the first roll with the slab passage interposed therebetween. A method for detecting an abnormal rotation of a second roll,
A roll rotation abnormality detection device comprising a first roll contact surface, a second roll contact surface, and a first friction force detection mechanism and / or a second friction force detection mechanism is provided in the slab passage. To pass through with the dummy bar,
The first roll contact surface is brought into contact with two adjacent first rolls, and the second roll contact surface is brought into contact with two adjacent second rolls A friction force applied to the first roll contact surface in a direction along the slab passage in the contact state is detected by the first friction force detection mechanism and / or the first roll contact surface. A friction force applied in a direction along the slab passage to the second roll contact surface is detected by the second friction force detection mechanism;
Based on the detection value of the first frictional force detection mechanism, the rotation abnormality of the first roll is detected, and / or based on the detection value of the second frictional force detection mechanism, the second A roll rotation abnormality detection method for continuous casting equipment, characterized by detecting roll rotation abnormality. The first roll contact surface is not simultaneously contacted with three or more first rolls, and the second roll contact surface is not contacted with three or more second rolls. 11. The continuous casting equipment according to claim 10, wherein the detection by the first frictional force detection mechanism and / or the detection by the second frictional force detection mechanism is performed in a state where they are not in contact with each other at the same time. Roll rotation abnormality detection method. The roll rotation abnormality detection device is passed through the slab passage while being held movably between the first roll side and the second roll side with respect to the dummy bar. Item 12. The roll rotation abnormality detection method for a continuous casting facility according to Item 10 or 11. Based on the detection value of the first friction force detection mechanism and the detection value of the roll interval detection mechanism that detects the roll interval between the first roll and the second roll, A rotation abnormality is detected, and / or a rotation abnormality of the second roll is detected based on a detection value of the second frictional force detection mechanism and a detection value of the roll interval detection mechanism. The roll rotation abnormality detection method of the continuous casting equipment in any one of Claims 10-12.

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