CN113600772B - Adjusting method for width adjusting oil cylinder of slab crystallizer - Google Patents
Adjusting method for width adjusting oil cylinder of slab crystallizer Download PDFInfo
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- CN113600772B CN113600772B CN202110888631.1A CN202110888631A CN113600772B CN 113600772 B CN113600772 B CN 113600772B CN 202110888631 A CN202110888631 A CN 202110888631A CN 113600772 B CN113600772 B CN 113600772B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/168—Controlling or regulating processes or operations for adjusting the mould size or mould taper
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Abstract
The invention relates to an adjusting method for a slab crystallizer width adjusting oil cylinder, which belongs to the technical field of auxiliary equipment of continuous casting machines and comprises the following steps: dividing a slab continuous casting machine into a plurality of units by taking 3 adjacent crystallizers as a group, wherein the crystallizers are numbered as 1#, 2# and 3# in sequence by each unit according to the material flowing direction; installing the width-adjusting oil cylinders of the same unit to the corresponding crystallizers, and adjusting according to the following method: the initial pressure of a width-adjusting oil cylinder of the crystallizer No. 1 is 7-8 MPa, the piston displacement is 2.0-4.5 mm, and the push-open displacement is more than or equal to 3 mm; the width adjusting oil cylinder of the 2# crystallizer has the initial pressure of 8-9 MPa and the piston displacement of 3.5-4 mm in a side plate-free state; the initial pressure of a width-adjusting oil cylinder of the 3# crystallizer is 9-10 MPa, the piston displacement is 2.0-4.5 mm, and the push-open displacement is more than or equal to 3 mm. The invention eliminates the seam caused by expansion and contraction when the crystallizer is used on site by setting proper adjusting pressure and piston displacement, and solves the problems of steel clamping and even steel leakage caused by molten steel splashing into the seam.
Description
Technical Field
The invention belongs to the technical field of auxiliary equipment of continuous casting machines, and relates to an adjusting method for a slab crystallizer width adjusting oil cylinder.
Background
A mold is a continuous casting apparatus for receiving molten steel poured from an intermediate tank and solidifying the molten steel into a solid shell having a predetermined cross-sectional shape. The casting blank is the most critical component of a continuous casting machine, and the structure, the material and the performance parameters of the casting blank play a decisive role in the quality of the casting blank and the production capacity of the casting machine. The head of the dummy bar is the movable inner bottom of the crystallizer when casting, and the molten steel is injected into the crystallizer and gradually condensed into a blank shell with a certain thickness and continuously pulled out. In the above process, the inner wall of the crystallizer bears the combined action of mechanical stress and thermal stress, such as the static pressure of high-temperature molten steel and the friction force generated by the relative movement of the inner wall and the shell, and the working condition is extremely bad. In order to be able to obtain a satisfactory cast strand, the crystallizer should satisfy the following basic conditions: sufficient rigidity and small deformation under the conditions of shock heating and large temperature gradient.
The combined crystallizer consists of 4 composite wall plates with wide and narrow surfaces and an outer frame, and is mainly used for continuous casting of plate blanks, large-section square blanks and special-shaped blanks. Each composite wall plate of the combined crystallizer consists of an inner wall copper plate (the outer side surface of which is milled with a cooling water channel) and an outer wall steel water tank which are connected by a stud. And a cooling water seam is formed between the inner wall copper plate and the outer wall so as to be cooled by water. The 4 composite walls are pressed tightly by a clamping mechanism. In order to realize the online width adjustment of the crystallizer, four groups of width adjustment oil cylinders are arranged on the narrow-surface wall plate of the crystallizer and are arranged on the upper part and the lower part of the narrow-surface wall plate of the crystallizer in two rows.
In the prior art, the combined crystallizer generally eliminates the intermittence between the narrow plate and the wide plate of the crystallizer by adjusting the piston rod of the width adjusting oil cylinder, but has the problems of steel clamping and steel leakage.
Disclosure of Invention
In view of this, the present invention aims to provide an adjusting method for a width-adjusting oil cylinder of a slab crystallizer, so as to solve the problems of steel clamping and steel leakage of the existing crystallizer.
In order to achieve the purpose, the invention provides the following technical scheme:
an adjusting method for a slab crystallizer width adjusting oil cylinder comprises the following steps:
dividing a slab caster into a plurality of units by taking 3 adjacent crystallizers as a group, and numbering the crystallizers as 1#, 2# and 3# in sequence by each unit according to the material flowing direction;
installing the width-adjusting oil cylinders of the same unit to the corresponding crystallizers, and debugging according to the following method:
debugging a width adjusting oil cylinder of the 1# crystallizer: when the width-adjusting oil cylinder is used for pressure test, the initial pressure is 7-8 MPa, the piston displacement is 2.0-4.5 mm, and the push-open displacement is more than or equal to 3 mm;
debugging a width adjusting oil cylinder of a 2# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, under the state without a side plate, the initial pressure is 8-9 MPa, and the piston displacement is 3.5-4 mm; after the water tank is depressurized, the displacement variation of the piston is 2-3 mm;
debugging a width adjusting oil cylinder of a 3# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 9-10 MPa, the piston displacement is 2.0-4.5 mm, and the push-open displacement is larger than or equal to 3 mm.
Optionally, before the width-adjusting oil cylinder is installed, the width-adjusting oil cylinder used by the crystallizer in the same unit is debugged according to the following method:
debugging a width adjusting oil cylinder of the 1# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 3-4 MPa, and when the pressure is increased to 8-9 MPa, the piston displacement reaches 3-4 mm;
debugging a width adjusting oil cylinder of a 2# crystallizer: when the width-adjusting oil cylinder is used for pressure test, the initial pressure is 3-4 MPa, and when the pressure is increased to 8-9 MPa, the piston displacement is 3.5-4 mm;
debugging a width adjusting oil cylinder of a 3# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 5-6 MPa, and when the pressure is increased to 8-9 MPa, the piston displacement is 2.5-3.5 mm.
Optionally, before installation, when the width-adjusting oil cylinders of the 1# and 2# crystallizers are subjected to pressure test, when the maximum pressure is 18-20 Mpa, the pressure reaches 18-20 Mpa, and the piston displacement is larger than 6 mm.
Optionally, before installation, when the width-adjusting oil cylinder of the 3# crystallizer is used for pressure testing, when the maximum pressure is 18-20 Mpa, and the pressure reaches 18-20 Mpa, the piston displacement is larger than 5 mm.
Optionally, before installation, the difference of the piston displacement of the oil cylinders used by the same crystallizer at 8MPa or 9MPa is less than 0.5 mm.
Optionally, the width-adjusting cylinders used by the crystallizers in the same unit are the same.
Optionally, the disc springs in the width-adjusting cylinder are arranged in a 3-disc shape.
Optionally, the width-adjusting oil cylinder is debugged to enable the crystallizer of the same unit to form an inverted cone, and the method comprises the following steps: the width adjusting oil cylinders of the 2# crystallizer are debugged firstly to enable the 2# crystallizer to reach the preset inverted taper, and then the width adjusting oil cylinders of the 1# crystallizer and the 3# crystallizer are debugged to enable the corresponding crystallizers to reach the preset inverted taper.
The invention has the beneficial effects that: by setting proper adjusting pressure and piston displacement, the crystallizer can keep smaller deformation, eliminates the seam insertion caused by expansion with heat and contraction with cold when the crystallizer is used on site, solves the problem of steel clamping and even steel leakage caused by molten steel splashing into the seam insertion, reduces the unplanned casting time of the casting machine, improves the operation rate of the casting machine and the yield of continuous casting, and reduces the production cost.
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 combinations particularly pointed out hereinafter.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
An adjusting method for a slab crystallizer width adjusting oil cylinder comprises the following steps:
dividing a slab caster into a plurality of units by taking 3 adjacent crystallizers as a group, and numbering the crystallizers as 1#, 2# and 3# in sequence by each unit according to the material flowing direction; each crystallizer is provided with four groups of width-adjusting oil cylinders which are arranged in two rows and two columns, namely two rows are arranged along the length direction of the crystallizer, and each row comprises an upper width-adjusting oil cylinder and a lower width-adjusting oil cylinder which are arranged up and down;
installing the width-adjusting oil cylinders of the same unit to the corresponding crystallizers, and debugging according to the following method:
debugging a width adjusting oil cylinder of the 1# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 7-8 MPa, the piston displacement is 2.0-4.5 mm, and the push-open displacement is more than or equal to 3 mm;
debugging a width adjusting oil cylinder of a 2# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, under the state without a side plate, the initial pressure is 8-9 MPa, and the piston displacement is 3.5-4 mm; after the water tank is decompressed, the displacement variation of the piston is 2-3 mm;
debugging a width adjusting oil cylinder of a 3# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 9-10 MPa, the piston displacement is 2.0-4.5 mm, and the push-open displacement is larger than or equal to 3 mm.
The invention can keep the crystallizer in small deformation by setting proper adjusting pressure and piston displacement, eliminates the seam caused by expansion with heat and contraction with cold when the crystallizer is used on site, solves the problems of steel clamping and even steel leakage caused by splashing molten steel into the seam, reduces the unplanned casting interruption times of the casting machine, improves the operation rate of the casting machine and reduces the production cost.
Optionally, before the width-adjusting oil cylinder is installed, the width-adjusting oil cylinder used by the crystallizer in the same unit is debugged according to the following method:
debugging a width adjusting oil cylinder of the 1# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 3-4 MPa, and when the pressure is increased to 8-9 MPa, the piston displacement reaches 3-4 mm;
debugging a width adjusting oil cylinder of a 2# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 3-4 MPa, and when the pressure is increased to 8-9 MPa, the piston displacement is 3.5-4 mm;
debugging a width adjusting oil cylinder of a 3# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 5-6 MPa, and when the pressure is increased to 8-9 MPa, the piston displacement is 2.5-3.5 mm.
According to the invention, before the width-adjusting oil cylinder is installed, the performance of the width-adjusting oil cylinder is adjusted according to the deformation characteristics of the corresponding crystallizer, so that the width-adjusting oil cylinder can be better matched with the crystallizer, and the service life of the crystallizer is prolonged.
Optionally, before installation, when the width-adjusting oil cylinders of the 1# and 2# crystallizers are subjected to pressure test, when the maximum pressure is 18-20 Mpa, the pressure reaches 18-20 Mpa, and the piston displacement is larger than 6 mm.
Optionally, before installation, when the width-adjusting oil cylinder of the 3# crystallizer is used for pressure testing, when the maximum pressure is 18-20 Mpa, and the pressure reaches 18-20 Mpa, the piston displacement is larger than 5 mm.
Optionally, before installation, the difference of the piston displacement of the oil cylinders used by the same crystallizer at 8MPa or 9MPa is less than 0.5 mm.
Optionally, the width-adjusting cylinders used by the crystallizers in the same unit are the same.
Optionally, the disc springs in the width-adjusting cylinder are arranged in a 3-disc shape.
Optionally, the width-adjusting oil cylinder is debugged to enable the crystallizer of the same unit to form an inverted cone, and the method comprises the following steps: the width adjusting oil cylinders of the 2# crystallizer are debugged firstly to enable the 2# crystallizer to reach the preset inverted taper, and then the width adjusting oil cylinders of the 1# crystallizer and the 3# crystallizer are debugged to enable the corresponding crystallizers to reach the preset inverted taper.
Optionally, after the 2# crystallizer is connected with the water tank, the size of the upper opening is 240.5 mm-241 mm, and the size of the lower opening is 238.5 mm-239 mm.
The invention not only can keep the crystallizer less deformation, eliminate the seam caused by expansion with heat and contraction with cold when the crystallizer is used on site, solve the problem of steel clamping and even steel leakage caused by splashing molten steel into the seam, but also reduce the maintenance time of the crystallizer and prolong the service life of the crystallizer. In addition, the number of times of unplanned casting interruption of the casting machine is reduced, so that the operation rate of the casting machine and the continuous casting yield are improved, and the production cost is reduced.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on 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 claims of the present invention.
Claims (8)
1. An adjusting method for a width-adjusting oil cylinder of a slab crystallizer is characterized by comprising the following steps of:
dividing a slab caster into a plurality of units by taking 3 adjacent crystallizers as a group, and numbering the crystallizers as 1#, 2# and 3# in sequence by each unit according to the material flowing direction;
installing the width-adjusting oil cylinders of the same unit to the corresponding crystallizers, and debugging according to the following method:
debugging a width adjusting oil cylinder of the 1# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 7-8 MPa, the piston displacement is 2.0-4.5 mm, and the push-open displacement is more than or equal to 3 mm;
debugging a width adjusting oil cylinder of a 2# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, under the state without a side plate, the initial pressure is 8-9 MPa, and the piston displacement is 3.5-4 mm; after the water tank is depressurized, the displacement variation of the piston is 2-3 mm;
debugging a width adjusting oil cylinder of a 3# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 9-10 MPa, the piston displacement is 2.0-4.5 mm, and the push-open displacement is larger than or equal to 3 mm.
2. The adjusting method for the width adjusting oil cylinder of the slab crystallizer as claimed in claim 1, characterized in that: before the width adjusting oil cylinder is installed, the width adjusting oil cylinder used by the crystallizer in the same unit is debugged according to the following method:
debugging a width adjusting oil cylinder of the 1# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 3-4 MPa, and when the pressure is increased to 8-9 MPa, the piston displacement reaches 3-4 mm;
debugging a width adjusting oil cylinder of a 2# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 3-4 MPa, and when the pressure is increased to 8-9 MPa, the piston displacement is 3.5-4 mm;
debugging a width adjusting oil cylinder of a 3# crystallizer: when the width-adjusting oil cylinder is used for pressure testing, the initial pressure is 5-6 MPa, and when the pressure is increased to 8-9 MPa, the piston displacement is 2.5-3.5 mm.
3. The adjusting method for the width adjusting oil cylinder of the slab crystallizer as claimed in claim 2, characterized in that: before installation, when width-adjusting oil cylinders of the 1# crystallizer and the 2# crystallizer are used for pressure testing, when the maximum pressure is 18-20 Mpa, the pressure reaches 18-20 Mpa, and the piston displacement is larger than 6 mm.
4. The adjusting method for the width adjusting oil cylinder of the slab crystallizer as claimed in claim 2, characterized in that: before installation, when a width-adjusting oil cylinder of a 3# crystallizer is used for pressure testing, the maximum pressure is 18-20 MPa, the pressure reaches 18-20 MPa, and the piston displacement is larger than 5 mm.
5. The adjusting method for the width adjusting oil cylinder of the slab crystallizer as claimed in claim 2, characterized in that: before installation, the difference of the piston displacement of the oil cylinders used by the same crystallizer is less than 0.5mm when the oil cylinders are at 8MPa or 9 MPa.
6. The adjusting method for the width adjusting oil cylinder of the slab crystallizer as claimed in claim 1, characterized in that: the width adjusting oil cylinders used by the crystallizers in the same unit are the same.
7. The adjusting method for the width adjusting oil cylinder of the slab crystallizer as claimed in claim 1, characterized in that: the disc springs in the width-adjusting oil cylinder are arranged according to a 3-disc shape.
8. The adjusting method for the width adjusting oil cylinder of the slab crystallizer as claimed in claim 1, characterized in that: the width cylinder is adjusted through debugging and makes the crystallizer of same unit form the back taper, and its step is: firstly debugging the width adjusting oil cylinder of the 2# crystallizer, and then debugging the width adjusting oil cylinders of the 1# crystallizer and the 3# crystallizer.
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| CN201361698Y (en) * | 2009-02-20 | 2009-12-16 | 上海梅山钢铁股份有限公司 | Detection device for crystallizer width-adjusting oil cylinders |
| CN202910264U (en) * | 2012-07-19 | 2013-05-01 | 宝钢工程技术集团有限公司 | Online hot width-adjusting device for slab casting machine crystallizer |
| CN103084549A (en) * | 2013-01-16 | 2013-05-08 | 中国重型机械研究院股份公司 | Crystallizer liquid steel static pressure simulation test device |
| CN104439143A (en) * | 2014-11-13 | 2015-03-25 | 中冶连铸技术工程有限责任公司 | Method and device for dynamically maintaining conicity of narrow face of slab crystallizer on line |
| KR20160059518A (en) * | 2014-11-18 | 2016-05-27 | 주식회사 포스코 | Width adjusting device of continuous caster mold, and control method thereof |
| CN110355340A (en) * | 2019-08-14 | 2019-10-22 | 中国重型机械研究院股份公司 | A kind of intelligence system and its application method controlling the wide soft clip power of crystallizer heat tune |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735031B (en) * | 2017-03-08 | 2019-03-22 | 中冶赛迪工程技术股份有限公司 | A kind of hot width adjusting method of continuous cast mold |
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- 2021-08-03 CN CN202110888631.1A patent/CN113600772B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201361698Y (en) * | 2009-02-20 | 2009-12-16 | 上海梅山钢铁股份有限公司 | Detection device for crystallizer width-adjusting oil cylinders |
| CN202910264U (en) * | 2012-07-19 | 2013-05-01 | 宝钢工程技术集团有限公司 | Online hot width-adjusting device for slab casting machine crystallizer |
| CN103084549A (en) * | 2013-01-16 | 2013-05-08 | 中国重型机械研究院股份公司 | Crystallizer liquid steel static pressure simulation test device |
| CN104439143A (en) * | 2014-11-13 | 2015-03-25 | 中冶连铸技术工程有限责任公司 | Method and device for dynamically maintaining conicity of narrow face of slab crystallizer on line |
| KR20160059518A (en) * | 2014-11-18 | 2016-05-27 | 주식회사 포스코 | Width adjusting device of continuous caster mold, and control method thereof |
| CN110355340A (en) * | 2019-08-14 | 2019-10-22 | 中国重型机械研究院股份公司 | A kind of intelligence system and its application method controlling the wide soft clip power of crystallizer heat tune |
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