JP5139931B2 - Guide roll segment for continuous casting equipment - Google Patents

Description

The present invention relates to a guide roll segment of a continuous casting facility for casting a bloom or a slab, and more specifically, holding and reducing a continuous cast piece (hereinafter simply referred to as a cast piece), holding a lower roll, The present invention relates to a guide roll segment of a continuous casting facility in which a fastening means is provided on a frame.

In recent years, in the guide roll segment of continuous casting equipment for casting bloom and slabs, the upper and lower rolls are held respectively between the upper and lower frames to improve the center segregation of slabs for bloom and slabs. Insert the spacer and tilt the upper frame with respect to the lower frame, for example, so that the distance between the upper and lower rolls gradually decreases from the entrance side to the exit side of the slab. Rolling down is performed with a roll. However, when a spacer is inserted between the upper and lower frames, the gap between the upper and lower rolls (inclination angle of the upper frame) is fixed to a fixed value determined by the thickness of the spacer. For example, there is a problem that it is impossible to follow when the lower roll interval is to be changed. Therefore, the spacer is divided into a pair of wedge-shaped members that come into contact with each other at an inclined surface inclined along the width direction of the slab, and one wedge-shaped member is fixed to the frame, and the other wedge-shaped member is inclined. It has been proposed to adjust the distance between the upper and lower rolls by changing the distance between the upper and lower frames by sliding along the surface (see, for example, Patent Document 1).

In addition, in the guide roll segment of continuous casting equipment for casting bloom and slab, the upper and lower frames have pin support parts from the viewpoint of ease of disassembly and assembly of the lower frame, assembly cost, and manufacturing cost. Adopted a structure connected by links. In particular, in the guide roll segment of recent slab continuous casting equipment, a hydraulic cylinder for upper and lower frame clamps with a built-in positioning sensor is used to remotely control the distance between the upper and lower rolls. . In these segment structures, since there are minute gaps for fitting machine parts at the connection locations of the upper and lower frames, for example, in Patent Document 2, the upper and lower rolls are once brought into contact with the slab surface. It is described that the backlash caused by the minute gap is eliminated, and the distance between the upper and lower rolls is controlled using the position of the hydraulic cylinder at the time of contact as a reference point. It is described that the initial value of the interval between the upper and lower rolls is set when the roll segment is replaced.

JP-A-10-156501 JP-A-8-90186 JP 2008-93711 A

However, in the invention described in Patent Document 1, since the inclination angle of the other frame with respect to one frame along the moving direction of the slab is constant, the amount of reduction of the slab is changed (the slab with the guide roll segment). The guide roll segment needs to be removed from the continuous casting equipment and replaced with a pair of wedge-shaped members with different inclination angles at the maintenance site. There is a problem that it takes a lot of time to adjust the segments and the productivity is lowered.
Further, in the invention described in Patent Document 2, the distance between the upper and lower rolls cannot be measured in advance offline, and the positioning operation of the hydraulic cylinder must be performed prior to casting, which complicates the casting operation. There arises a problem that productivity decreases. Furthermore, in the invention described in Patent Document 3, there is a problem that if the roll interval once set is shifted during use, the amount of shift cannot be grasped. When it is necessary to re-measure the roll interval between the upper and lower rolls, especially in the curved segment, the upper frame tilts due to the influence of the minute gaps existing in the upper and lower frame joints, and the correct roll interval is easy. Another problem is that it cannot be measured.

The present invention has been made in view of such circumstances, and it is possible to easily check the upper and lower roll intervals online by eliminating the influence of backlash caused by a minute gap existing in the fastening means provided in the upper and lower frames. It aims at providing the guide roll segment of the equipment for continuous casting which can be set up.

The guide roll segment of the continuous casting equipment according to the present invention that meets the above-mentioned object is composed of a slab that is pressed down across the upper and lower surfaces, and holds the lower roll, the lower frame, and the front and rear of the upper and lower frames. Each of the fastening means is connected to a hydraulic cylinder provided on the upper frame and a rod of the hydraulic cylinder such that an upper end portion is detachably connected to the lower end portion. In the guide roll segment of the continuous casting equipment having a link member detachably connected to the lower frame,
Pushing means for lifting the upper frame is provided between the upper and lower frames, and the upper frame is held at the upper limit position against its own weight.

In the guide roll segment of the continuous casting equipment according to the present invention, a spring that constantly urges the upper frame upward can be used as the push-up means.
Here, it is preferable that a height adjusting mechanism is provided in series with the spring.

In the guide roll segment of the continuous casting facility according to the present invention, the upper and lower sides of the link member are respectively connected to the hydraulic pressure via a pin support member, a pin inserted through the pin support member, and a spherical seat attached to the pin. It is preferably connected to a cylinder rod and the lower frame.

In the guide roll segment of the continuous casting equipment according to the present invention, the upper frame is lifted by the lifting means and held at the upper limit position against the weight of the upper frame. It is possible to eliminate backlash, and in particular, it is possible to prevent the upper frame from being tilted in the guide roll segment disposed in the curved portion, and between the upper and lower rolls on-line (when the guide roll segment is attached to a continuous casting facility). It becomes possible to improve the measurement accuracy of the interval. Thereby, the amount of reduction of the slab using the upper and lower rolls can be accurately controlled, and the quality of the slab can be stabilized.

In the guide roll segment of the continuous casting equipment according to the present invention, when a spring that constantly urges the upper frame upward is used as the lifting means, the structure of the lifting means is simple, so the manufacturing cost of the lifting means Can be reduced, and maintenance of the push-up means is facilitated.

In the guide roll segment of the continuous casting equipment according to the present invention, when a height adjustment mechanism is provided in series with the spring, the amount of contraction of the spring can be kept within a certain range by adjusting the height position of the spring. The lifting force of the frame can be kept within a certain range. Furthermore, the upper and lower roll intervals can be freely adjusted.

In the guide roll segment of the continuous casting equipment according to the present invention, the upper and lower sides of the link member are respectively connected to the pin of the hydraulic cylinder via the pin support member, the pin inserted through the pin support member, and the spherical seat attached to the pin. When connecting to the lower frame, it is possible to prevent the bending moment from acting on the link member even if the upper frame is inclined with respect to the lower frame. As a result, deformation and breakage of the link member can be prevented.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a front view schematically showing a guide roll segment of the continuous casting equipment according to one embodiment of the present invention, and FIG. 2 is a side view schematically showing the guide roll segment of the continuous casting equipment. FIG. 3 is an explanatory diagram of the lifting means according to the modification.

As shown in FIGS. 1 and 2, a guide roll segment (hereinafter also simply referred to as a guide roll segment) 10 of a continuous casting facility according to an embodiment of the present invention is formed on a slab 11. It has upper and lower frames 14 and 15 for holding down the lower rolls 12 and 13 respectively, and four fastening means 16 provided on both the left and right sides of the upper and lower frames 14 and 15. The fastening means 16 includes a hydraulic cylinder 17 provided on the upper frame 14 and a link member having an upper end portion detachably connected to a rod 18 of the hydraulic cylinder 17 and a lower end portion detachably connected to the lower frame 15. And a connecting rod 19 as an example. Thereby, by operating each hydraulic cylinder 17, the roll interval between the upper rolls 12 and 13 can be adjusted. A push-up means 20 for lifting the upper frame 14 is provided between the upper and lower frames 14 and 15. This will be described in detail below.

A plurality of upper and lower rolls 12 and 13 are provided in pairs, and each upper roll 12 has its axis in a direction perpendicular to the direction of movement (casting) of the slab 11 (width direction of the slab 11). The upper frame 14 is held by the upper frame 14 so that the height of the axial center of each upper roll 12 is the same as that of the cast slab 11. Each lower roll 13 is also attached via a bearing (not shown) with its axis oriented in a direction perpendicular to the moving direction of the slab 11, and the height position of the axis of each lower roll 13 is set to the slab 11. On the other hand, it is held by the lower frame 15 so as to be the same. With such a configuration, for example, when the upper frame 14 is inclined with respect to the lower frame 15, the distance between the upper and lower rolls 12, 13 gradually increases from the entrance side to the exit side of the slab 11. It can be narrowed. Thereby, the slab 11 can be rolled down when passing between the upper and lower rolls 12 and 13. One pair of the plurality of upper and lower rolls 12 and 13 is a drive roll that is connected to a rotating shaft of an electric motor (not shown) and applies a moving force to the slab 11. Here, the lower rolls 12 and 13 are the drive rolls, which are arranged at the center in the front-rear direction (the moving direction of the slab 11 is the forward direction).

Here, left and right cutouts 21 and 22 are formed at the center in the front-rear direction on both the left and right sides (in the width direction of the slab 11) of the upper frame 14, respectively. The lower frame 15 has a lower part fixed to a frame of a continuous casting facility (not shown), a base member 23 having a lower roll 13 attached to the upper part, and standing on both the left and right side parts of the base member 23. And side plate members 25 and 26 each having a lifting guide portion 24 which is inserted into the notches 21 and 22 formed in the upper frame 14 and serves as a guide when the upper frame 14 moves up and down with respect to the lower frame 15. ing. In addition, cylindrical protrusions 27 are provided on opposite sides of the cutouts 21 and 22 of the upper frame 14 so that the upper frame 14 can be inclined in the casting direction. Sliding plates 28 are provided on the front and rear sides of the, respectively, so that the protrusions 27 come into contact with each other and slide.

Furthermore, through holes (not shown) penetrating the upper frame 14 and the lower frame 15 perpendicularly are formed at left and right front and rear positions with respect to the moving direction of the slab 11 of the upper and lower frames 14 and 15. The elevating guide portion 24 of the lower frame 15 is inserted into the notches 21 and 22 of the upper frame 14, and the lower frame 15 and the upper frame 14 are disposed in a state where the protrusion 27 and the sliding plate 28 are in contact with each other. At this time, the positions of the through holes formed in the upper frame 14 and the through holes formed in the lower frame 15 are adjusted so as to overlap each other.

A connecting rod 19 is inserted into the through-hole formed in the lower frame 15, and the upper portion of the connecting rod 19 protrudes from the upper end of the through-hole formed in the lower frame 15 in the through-hole formed in the upper frame 14. Is inserted from below. Further, hydraulic cylinders 17 are respectively attached to the left and right front and rear positions on the upper surface of the upper frame 14, and the rods 18 of the respective hydraulic cylinders 17 are inserted into through holes formed in the upper frame 14 from above. The intermediate portion of the rod 18 is guided by a rod guide 29 provided in a through hole formed in the upper frame 14. Here, in the hydraulic cylinder 17, a setter for setting the position of the rod 18, a movement amount measuring sensor for measuring the movement amount of the rod 18, and the measured value of the movement amount measuring sensor are set to values set by the setting device. An adjuster for operating the hydraulic cylinder 17 is provided so as to match, and the rod 18 of the hydraulic cylinder 17 can be positioned at the position (target position) set by the setting device.

As shown in FIGS. 1 and 2, the lower end portion of the connecting rod 19 is attached to the pin support members 30 and 31 that are attached to each other, the pin 32 that passes through the pin support members 30 and 31, and the pin 32. The base member 23 of the lower frame 15 is connected via the spherical seat 33. Here, the pin support members 30 and 31 are attached to the base member 23. An insertion hole through which the pin 32 with the spherical seat 33 is inserted is formed below the connecting rod 19, and a spherical seat receiver 35 that abuts the spherical seat 33 is provided inside the insertion hole. The upper end of the connecting rod 19 is connected to a hydraulic cylinder through pin support members 36 and 37 that are attached to each other, a pin 38 that passes through the pin support members 36 and 37, and a spherical seat 39 that is attached to the pin 38. 17 rods 18 are connected. Here, the pin support members 36 and 37 are attached to the connecting rod 19. An insertion hole through which a pin 38 with a spherical seat 39 is inserted is formed below the rod 18 of the hydraulic cylinder 17, and a spherical seat receiver 41 that abuts the spherical seat 39 is provided inside the insertion hole. Yes. Note that the pin 32 and the pin 38 are arranged in directions orthogonal to each other. As a result, the rod 18 of the hydraulic cylinder 17 provided at the left and right front positions of the upper frame 14 is contracted with respect to the rod 18 of the hydraulic cylinder 17 provided at the left and right rear positions of the upper frame 14, respectively. When the upper frame 14 is inclined downward with respect to the lower frame 15 so that the distance between the upper and lower rolls 12 and 13 gradually decreases from the entrance side to the exit side of the slab 11, It is possible to prevent the bending moment from acting on the rod 19.

The push-up means 20 includes a vertical hole (not shown) formed at the front and rear positions of the left and right side plate members 25 and 26 of the lower frame 15, a spring accommodating portion 42 provided below the vertical hole, In a compressed state, the lower end of the spring 43 is placed in contact with the bottom of the spring accommodating portion 42, and the lower end is in contact with the upper end of the spring 43 by being inserted into the vertical hole, and the upper side is upward from the vertical hole. It has a contact rod 44 that protrudes and an upper end contacts with the lower surface of the upper frame 14. The intermediate portion of the contact rod 44 is guided by a rod guide 45 provided on the upper side in a vertical hole formed in the side plate members 25 and 26.
Here, the spring constant of the spring 43 and the amount of contraction of the spring 43 so that the total sum of the restoring forces generated in each spring 43 is, for example, 1.05 to 1.2 times the weight of the upper frame 14. Set. Accordingly, the upper frame 14 can be constantly biased upward by the spring 43 via the contact rod 44, and the upper frame 14 can be lifted.

FIG. 3 shows a push-up means 46 according to a modification. Compared with the push-up means 20, the push-up means 46 is provided with a jack 47 as an example of a height adjustment mechanism at the lower part of the vertical hole, and the spring accommodating portion 42 is provided at the lower part of the vertical hole via the jack 47. It is characterized by being. By providing the jack 47 in series with the spring 43, the jack 47 can be operated to adjust the height position of the spring accommodating portion 42 in the lower frame 15, and the amount of contraction of the spring 43 can be kept within a certain range. The lifting force when lifting the upper frame 14 via the contact rod 44 can be maintained within a certain range. Furthermore, the distance between the upper and lower rolls 12 and 13 can be freely adjusted. Here, as the jack 47, a hydraulic or mechanical type can be used.

Then, the effect | action of the guide roll segment 10 of the equipment for continuous casting which concerns on one embodiment of this invention is demonstrated.
In the guide roll segment 10, the spring constant of the spring 43 provided in the push-up means 20 and the amount of contraction of the restoring force generated in the spring 43 are the total weight of the upper frame 14, for example, 1.05 to 1. Since it is set to be doubled, the upper frame 14 can always be urged upward by bringing the upper end of the contact rod 44 of the push-up means 20 into contact with the lower surface of the upper frame 14, The upper frame 14 can be held at the upper limit position against its own weight.

When the upper frame 14 is always lifted and held at the upper limit position, a minute gap existing in the connecting portion between the lower end portion of the connecting rod 19 and the lower frame 15, that is, the pin support members 30, 31 and the pin 32. Between the spherical seat 33 attached to the pin 32 and the spherical seat receiver 35 abutting against the spherical seat 33 can be eliminated, and the play of the connecting rod 19 can be eliminated. A minute gap existing in the connecting portion between the upper end portion and the rod 18 of the hydraulic cylinder 17, that is, between the pin support members 36, 37 and the pin 38, comes into contact with the spherical seat 39 and the spherical seat 39 attached to the pin 38. The play caused by the minute gap existing between the spherical seat receiver 41 can be eliminated.

Since the upper frame 14 of the guide roll segment 10 is constantly urged upward, even if the guide roll segment 10 is disposed on the curved portion of the continuous casting equipment, the upper frame 14 does not tilt, and the upper, lower rolls 12, It becomes possible to measure the interval between 13 accurately. Further, since the upper frame 14 is always lifted and held at the upper limit position, a minute gap existing in the connecting portion between the connecting rod 19 and the lower frame 15, and the connecting rod 19 and the rod 18 of the hydraulic cylinder 17 When the slab 11 is sandwiched between the upper and lower rolls 12 and 13 even in a state where the slab 11 is not squeezed, it is possible to eliminate the play caused by the minute gaps existing in the connecting portion of the slab. Can be in the same state. For this reason, the guide roll segment 10 is attached to a continuous casting facility and measured, and the distance between the upper and lower rolls 12 and 13 is adjusted by the operation of the hydraulic cylinder 17 based on the distance between the lower rolls 12 and 13. can do.

In the push-up means 20, the spring 43 is disposed in the spring accommodating portion 42, and the upper end abuts against the lower surface of the upper frame 14 and the lower end contacts the upper end of the spring 43 between the spring 43 and the upper frame 14. Since the contact rod 44 in contact is disposed, the upper and lower frames 14 and 15 can be easily disassembled and assembled.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included.
For example, a spring accommodating portion of a push-up means for lifting the upper frame can be formed on the upper frame. In this case, the contact rod contacts the upper surface of the lower frame, and the upper frame is lifted through the contact rod.

It is a front view which shows typically the guide roll segment of the equipment for continuous casting which concerns on one embodiment of this invention. It is a side view which shows typically the guide roll segment of the equipment for continuous casting. It is explanatory drawing of the raising means which concerns on a modification.

Explanation of symbols

10: guide roll segment of equipment for continuous casting, 11: cast slab, 12: upper roll, 13: lower roll, 14: upper frame, 15: lower frame, 16: fastening means, 17: hydraulic cylinder, 18: rod, 19: Connecting rod, 20: Pushing means, 21, 22: Notch, 23: Base member, 24: Lifting guide part, 25, 26: Side plate member, 27: Projection, 28: Sliding plate, 29: Rod Guide, 30, 31: Pin support member, 32: Pin, 33: Spherical seat, 35: Spherical seat receiver, 36, 37: Pin support member, 38: Pin, 39: Spherical seat, 41: Spherical seat receiver, 42: Spring housing part, 43: spring, 44: contact rod, 45: rod guide, 46: push-up means, 47: jack

Claims (4)

The upper and lower surfaces of the slab are pressed down and the lower roll is held, the lower frame, and four fastening means provided on the left and right sides of the upper and lower frames, respectively. The means includes a hydraulic cylinder provided in the upper frame, and a link member having an upper end detachably connected to a rod of the hydraulic cylinder and a lower end detachably connected to the lower frame. In the guide roll segment of equipment
A guide roll segment for a continuous casting facility, wherein a push-up means for lifting the upper frame is provided between the upper and lower frames, and the upper frame is held at an upper limit position against its own weight. 2. The guide roll segment for continuous casting equipment according to claim 1, wherein a spring for constantly urging the upper frame upward is used as the lifting means. segment. The guide roll segment of the continuous casting equipment according to claim 2, wherein a height adjusting mechanism is provided in series with the spring. The guide roll segment of the equipment for continuous casting according to any one of claims 1 to 3, wherein the upper and lower sides of the link member are respectively a pin support member, a pin inserted through the pin support member, and a spherical surface attached to the pin. A guide roll segment of a continuous casting facility, wherein the guide roll segment is connected to a rod of the hydraulic cylinder and the lower frame through a seat.

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