CN210702437U

CN210702437U - Online calibration tool for roll gap of sector section

Info

Publication number: CN210702437U
Application number: CN201921472927.XU
Authority: CN
Inventors: 秦文彬; 刘继明
Original assignee: CISDI Engineering Co Ltd
Current assignee: CISDI Engineering Co Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-06-09
Anticipated expiration: 2029-09-05

Abstract

The utility model relates to a fan-shaped section roll gap online calibration instrument belongs to former detection area. The calibrating tool comprises a calibrating block I, a calibrating block II and a dummy bar body, the thickness precision of the two calibrating blocks is very high, the two calibrating blocks are connected through chain links in the middle, the two calibrating blocks can be bent in a single direction, conveying in a two-cold guide section is facilitated, and the calibrating tool is used for calibrating a roll gap of a fan-shaped section. The displacement sensor value detected by the hydraulic cylinder for adjusting the roll gap corresponding to the initial roll gap is determined again, so that correction is realized, the online control precision of the roll gap of the sector section is improved, and the aim of stable high-quality production of the continuous casting machine is fulfilled finally.

Description

Online calibration tool for roll gap of sector section

Technical Field

The utility model belongs to former detection area, concretely relates to online calibration tool of fan-shaped section roll gap.

Background

The secondary cooling guide section of the slab caster consists of a plurality of fan-shaped sections, the secondary cooling guide section supports and cools the casting blank until the casting blank is completely solidified, and the roll gap precision of the fan-shaped sections has important influence on the quality of the casting blank.

At present, the roll gap calibration of a sector section of a slab caster, which is performed by a displacement sensor for remote roll gap control, is performed in a maintenance area, after the calibration is completed, the sector section is lifted and installed on line, and then the value of the displacement sensor corresponding to the set roll gap is transmitted to the line for roll gap adjustment and control. After the sector section is produced for a period of time, due to the influence of factors such as roller abrasion and hinge point gaps (hinge point structural type sector section), roll gap precision can deviate, and the production quality of a casting blank can be influenced in serious cases.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a can carry out the instrument of maring again to fan-shaped section roll gap on line to improve fan-shaped section roll gap on-line control precision, reach the purpose that the continuous caster stabilizes high quality production.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a fan-shaped section roll gap is at line demarcation instrument, includes calibration block I, calibration block II and dummy bar body, and one side of calibration block I is through a plurality of chain link and II rotatable coupling of calibration block, and the opposite side passes through chain link and dummy bar body rotatable coupling.

Further, the dummy bar body is a dummy bar body in the chain type dummy bar.

Furthermore, the calibration block I, the calibration block II and the chain link as well as the chain link and the dummy bar body are detachably connected.

Further, the thickness of the calibration block I is the same as that of the calibration block II.

The beneficial effects of the utility model reside in that:

the calibration tool can realize online recalibration of the roll gap of the fan-shaped section, is convenient and quick to operate, improves the detection efficiency, can improve the online control precision of the roll gap of the fan-shaped section, and achieves the purpose of stable high-quality production of a continuous casting machine.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.

Drawings

For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a front view of an on-line calibration tool for a sector roll gap;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is an enlarged view of the segment roll gap on-line calibration tool (without the dummy bar body);

fig. 4 is an on-line layout diagram of the segment of the slab caster.

Reference numerals:

the device comprises a calibration block I-1, a calibration block II-2, a dummy bar body-3, a chain link-4, a pin shaft-5, a sector-6, a roller pair-601, a hydraulic cylinder-7 for adjusting a roller gap and a photoelectric detector-8.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Referring to fig. 1 to 3, an online calibrating tool for a sector roll gap includes a calibrating block i 1, a calibrating block ii 2, and a dummy bar body 3, wherein one side of the calibrating block i 1 is rotatably connected to the calibrating block ii 2 through a plurality of chain links 4, and the other side is rotatably connected to the dummy bar body 3 through the chain links 4. The thickness of calibration piece I1 is the same and the thickness precision is very high with calibration piece II 2 for demarcate fan-shaped section roll gap, calibration piece I1, calibration piece II 2 pass through the chain link and connect, and one-way bending can be realized to chain link 4, is convenient for carry in two cold guide sections.

Preferably, the dummy bar body is a dummy bar body in a chain type dummy bar. Namely, the dummy bar is reformed by a dummy bar in a slab caster. Specifically, a dummy bar head and a transition section on a dummy bar in a continuous casting machine are taken down and connected with a chain link through a pin shaft 5 to form a sector-shaped section calibration tool together with a calibration block.

As a further improvement of the scheme, the calibration block I1, the calibration block II 2 and the chain link 4 as well as the chain link 4 and the dummy bar body 3 are detachably connected. Not only be convenient for replace calibration piece I1, calibration piece II 2, conveniently realize the regulation of the interval between calibration piece I1 and the calibration piece II 2 again to be applicable to the calibration of sector section roll gap in the two cold guide sections of difference.

As shown in fig. 4, the second cold guiding segment of the continuous casting machine in this example is formed by connecting fourteen fan-shaped segments 6 in sequence, each of which is seven rolls (seven sets of roll pairs), and the fan-shaped segments in the whole guiding segment can be divided into three different specifications, wherein the ① - ⑤ fan-shaped segments are of the same specification, the ⑥ - ⑦ fan-shaped segments are of the same specification, and the third segment is of the same specification

The sector sections are of the same specification. Each sector section comprises an inner arc roller and an outer arc roller, a plurality of roller pairs 601 are oppositely arranged on the inner arc roller and the outer arc roller, and a roller gap is formed between the roller pairs of the inner arc roller and the outer arc roller. And the inlet and the outlet of each sector section are respectively provided with a hydraulic cylinder 7 for adjusting the roll gap, and the hydraulic cylinder 7 for adjusting the roll gap is provided with a displacement sensor so as to correspondingly acquire position signals, and the signals can be converted into actual roll gaps through an algorithm.

The segment roll gap on-line calibration tool described above is used for on-line calibration of segment roll gaps as shown in fig. 4. The calibration principle is as follows: the value detected by the displacement sensor on the hydraulic cylinder is adjusted through the roll gap, so that the initial roll gap value is determined again, the roll gap of the sector section is adjusted again according to the initial roll gap value, and the purpose of stable and high-quality production of the continuous casting machine is finally achieved.

Specifically, the online calibration method for the roll gap of the sector section comprises the following steps:

(1) and taking the No. 2 roller pair and the No. 6 roller pair (No. 2 last) on each fan-shaped section in the two cold guide sections as calibration measuring rollers, and sequentially calculating the arc distance between the two calibration measuring rollers corresponding to the fan-shaped sections with three specifications in the two cold guide sections.

The arc distance between the two calibrated measuring rollers in the sector is directly calculated. No. 2 roller pair and No. 6 roller pair are used as calibration measuring rollers, so that errors of section boundaries can be eliminated, and the detection precision of the section boundaries is guaranteed. The arc distance of the calibration measuring roller of the fan-shaped sections with different specifications is correspondingly determined, so that the most appropriate size range can be selected, and the size and the distance of the calibration blocks in the calibration tool can be conveniently determined in the subsequent steps.

(2) Manufacturing a chain type calibration tool: the chain type calibration tool is formed by rotatably connecting a calibration block I and a calibration block II through a plurality of chain links, and the other side of the calibration block I is rotatably connected with a dummy bar body through the chain links; the calibration block I, the calibration block II and the dummy bar body can be bent in one direction.

The distance between the calibration block I and the calibration block II is a calibration distance which is an optimal distance determined from the arc distance calculated in the step (1); the optimal distance should satisfy: in each sector section, the calibration block I and the calibration block II are correspondingly positioned between the roll gaps corresponding to the No. 2 roll pair and the No. 6 roll pair.

(3) And (3) calculating the arc distance Li between the outer arc roller at the end of each fan-shaped section and the photoelectric detector 8 at the outlet of the two cold guide sections according to the arrangement condition of the roller rows of the fan-shaped sections in the two cold guide sections, wherein i is the number of the fan-shaped sections, and i is 1,2 and 3 …. This distance is used as a monitoring distance, from which the operating position of the chain calibration tool can be determined.

(4) And (3) hoisting the chain type calibration tool determined in the step (2) to a roller way at the outlet of the second cold guide section, and sequentially conveying the chain type calibration tool to the calibration measuring rollers of each sector section under the driving action of the driving rollers of the sector sections.

And a displacement detection device is arranged on the calibration block I or the calibration block II to detect the line-to-position of the calibration block, and the information transmission is carried out through the encoder and the control system. When each sector driving roller drives the chain type calibration tool to convey forwards, the running position of the chain type calibration tool is monitored in real time through the displacement detection device, and the arc distance Li calculated in the step (3) is compared with the running position to determine whether the chain type calibration tool is conveyed to the calibration measuring roller of the sector to be calibrated.

(5) After the chain type calibration tool reaches the position of a calibration measuring roller of a sector section to be calibrated, a hydraulic cylinder for adjusting the roller gap drives an inner arc frame of the sector section to press down, so that a No. 2 roller pair and a No. 6 roller pair of an inner arc roller and an outer arc roller clamp a calibration block I and a calibration block II; the pressure of the hydraulic cylinder for adjusting the roll gap is increased to eliminate the gap between the hinge point and the bearing in the sector section and eliminate the error caused by the gap.

(6) And (5) detecting a displacement value by a displacement sensor on the hydraulic cylinder for adjusting the roll gap, wherein the displacement value is the corresponding calibrated roll gap value. The change condition of the roll gap of each sector section in the secondary cooling guide section after a period of operation can be determined by comparing the detected roll gap value with the initial roll gap value; subsequently, the roll gap can be reset according to the calibrated roll gap value and the displacement sensor value of the hydraulic cylinder for adjusting the corresponding roll gap.

Generally, in the step (5), the hinge point and the bearing clearance in the sector section can be eliminated by increasing the pressure of the hydraulic cylinder to about 10MPa, and the pressure of the hydraulic cylinder is adjusted by a hydraulic system.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a fan-shaped section roll gap is demarcation instrument on line which characterized in that: including calibration piece I, calibration piece II and dummy bar body, one side of calibration piece I is through a plurality of chain link and II rotatable coupling of calibration piece, and the opposite side passes through chain link and dummy bar body rotatable coupling.

2. The online calibration tool for the roll gap of the sector as claimed in claim 1, wherein: the dummy bar body is a dummy bar body in the chain type dummy bar.

3. The online calibration tool for the roll gap of the sector as claimed in claim 1, wherein: the calibration block I, the calibration block II and the chain link as well as the chain link and the dummy bar body are detachably connected.

4. The online calibration tool for the roll gap of the sector as claimed in claim 1, wherein: the thickness of the calibration block I is the same as that of the calibration block II.