CN211028014U - Control system of crystallizer water of continuous casting machine - Google Patents
Control system of crystallizer water of continuous casting machine Download PDFInfo
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- CN211028014U CN211028014U CN201921617988.0U CN201921617988U CN211028014U CN 211028014 U CN211028014 U CN 211028014U CN 201921617988 U CN201921617988 U CN 201921617988U CN 211028014 U CN211028014 U CN 211028014U
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Abstract
The utility model relates to a control system of conticaster crystallizer water belongs to metallurgical technical field. The system comprises a crystallizer water inlet system with a water quantity disturbance function, a crystallizer system and a crystallizer water outlet system; an object of the utility model is to provide a control system of conticaster crystallizer water through changing the mobile form of crystallizer water in crystallizer water seam, becomes the turbulent flow mode from the laminar flow mode promptly to reduce or eliminate the boundary layer of crystallizer cooling water on crystallizer copper face, and then reduce the thermal resistance between copper and crystallizer copper board, with promoting heat transfer effect, improve thickness and the intensity of base shell in the crystallizer. The method is simple, low in cost and convenient to maintain.
Description
Technical Field
The utility model belongs to the technical field of the metallurgy, a control system of conticaster crystallizer water is related to.
Background
As the economy of China shifts from a high-speed growth stage to a high-quality development stage, higher requirements are put forward on the improvement of the production efficiency of enterprises, in the field of the steel industry, the four major processes from raw materials to finished products are generally carried out, namely blast furnace iron making, converter steel making, continuous casting blank forming and steel rolling finished products, and at present, the continuous casting blank forming is a restrictive process for realizing high efficiency, so that the improvement of the continuous casting efficiency is the key for improving the production efficiency of the steel industry.
Continuous casting is a process of converting liquid molten steel into a solid casting blank with a specific shape by using liquid molten steel as a main raw material through a crystallizer, a guide roll, secondary cooling and other process links as shown in figure 1.
The biggest reason why the increase of the drawing speed in the continuous casting process is difficult to realize is that the probability of the occurrence of a breakout accident in the crystallizer area is greatly increased under high drawing speed, and huge economic loss is caused. The reason for the improvement of the breakout rate is 2: 1) internal factors, namely short stay time of a casting blank in the crystallizer at a high pulling speed, thin shell and high temperature, lead to low tensile strength; 2) under the external factor-high drawing speed, the friction force between the blank shell and the crystallizer is increased.
In order to solve the above problems, Daneliercado Tunni et al have proposed a high-efficiency continuous casting mold (patent name: a high-efficiency continuous casting mold patent number: 201420063767.4) in which a plurality of strip-shaped grooves are punched on the inner surface of the copper tube of the mold. So as to realize high casting speed pouring and high defect-free rate of casting blanks. Simultaneously, very big improvement the life of copper pipe. A novel crystallizer copper pipe (patent name: plum blossom mold copper pipe, patent number: 201520168790.4) is provided by the mesometallurgy continuous casting Li Fushuai and the like, the cross section of the upper curved surface of the crystallizer copper pipe is convex, the cross section of the middle curved surface is rectangular, and the cross section of the lower curved surface is rectangular with four convex corners, so that the surface temperature of a blank shell of the crystallizer copper pipe is more uniform along the circumferential length direction of the cross section, and the purpose of higher blank drawing speed is realized.
According to the scheme, in order to improve the pulling speed, the structure of the crystallizer is optimized, so that the structure of the crystallizer becomes complex, and the required processing and maintenance cost is high.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a control system for crystallizer water of continuous casting machine, which changes the flowing form of the crystallizer water in the water gap of the crystallizer, i.e. from laminar flow to turbulent flow, so as to reduce or eliminate the boundary layer of the crystallizer cooling water on the copper plate surface of the crystallizer, and further reduce the thermal resistance between the copper plate and the copper plate of the crystallizer, so as to improve the heat transfer effect and the thickness and strength of the blank shell in the crystallizer. The method is simple, low in cost and convenient to maintain.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a control system for crystallizer water of a continuous casting machine comprises a crystallizer water inlet system, a crystallizer system and a crystallizer water outlet system which are sequentially connected and used for water quantity disturbance.
Optionally, the crystallizer water inlet system includes a crystallizer normal state water inlet subsystem and a crystallizer emergency state water inlet subsystem.
Optionally, the crystallizer normal state water inlet subsystem comprises a pneumatic regulating valve for remote regulation, a check valve and a water inlet pipeline.
Optionally, the crystallizer emergency state water inlet subsystem comprises a check valve and a water inlet pipeline.
Optionally, a local pressure gauge and a temperature sensor I are arranged between the crystallizer water inlet system and the crystallizer system.
Optionally, in the crystallizer system, a crystallizer copper plate, a crystallizer water seam, crystallizer cooling water and a crystallizer back plate are sequentially arranged along a direction away from the inner cavity of the crystallizer.
Optionally, the crystallizer water gap is formed by a gap between a crystallizer back plate and a crystallizer copper plate, and is used for enabling crystallizer cooling water to flow through the crystallizer water gap and continuously take away heat.
Optionally, the crystallizer water outlet system comprises a temperature sensor II, a flow sensor and a water outlet pipeline.
The beneficial effects of the utility model reside in that: the function of reducing the cooling water boundary layer between the crystallizer water and the crystallizer copper plate can be realized by simply modifying the crystallizer water inlet system or dynamically adjusting the flow regulating valve of the crystallizer water inlet system, so that the thermal resistance between the crystallizer water and the crystallizer copper plate is reduced, and the purpose of improving the heat transfer efficiency is further achieved.
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 schematic view of a continuous caster;
FIG. 2 is a schematic view of a crystallizer cooling system;
FIG. 3 is a schematic diagram of a crystallizer.
Reference numerals: the system comprises a crystallizer water inlet system 1, a crystallizer system 2, a crystallizer water outlet system 3, a pneumatic regulating valve 101, a check valve 102, a crystallizer emergency state water inlet subsystem 103, a temperature sensor 104, a local pressure gauge 105, liquid molten steel 201, a crystallizer copper plate 202, a crystallizer water seam 203, a crystallizer back plate 204, a solidified shell 205, a temperature sensor 301, a flow sensor 302 and a crystallizer return water pipeline 303.
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. 1-3, the reference numbers in the figures refer to the following elements: the crystallizer water system comprises a crystallizer water inlet system 1 with a water quantity disturbance function, a crystallizer system 2, a crystallizer water outlet system 3, a pneumatic regulating valve 101, a check valve 102, a crystallizer emergency state water inlet subsystem 103, a temperature sensor 104, a local pressure gauge 105, liquid molten steel 201, a crystallizer copper plate 202, a crystallizer water seam 203, a crystallizer back plate 204, a solidified shell 205, a temperature sensor 301, a flow sensor 302 and a crystallizer water return pipeline 303.
The utility model discloses be suitable for continuous casting process, a control system of conticaster crystallizer water, including crystallizer water intake system, crystallizer system and the crystallizer water system that has the water yield disturbance function.
A crystallizer water inlet system with a water quantity disturbance function comprises a crystallizer normal state water inlet subsystem and a crystallizer emergency state water inlet subsystem.
Optionally, the crystallizer normal state water inlet subsystem comprises a pneumatic adjusting valve, a check valve and a water inlet pipeline which can be remotely adjusted.
Alternatively, the flow rate adjustment valve has a function of remote adjustment, that is, a function of adjusting the opening degree of the valve by an electric signal.
Alternatively, the target set value Qi of the water inlet amount of the crystallizer includes a conventional set water amount Qc-400L/min and a disturbance water amount Qt-20 sin (1.5t), and Qi-Qc + Qt.
Optionally, the set water amount of the crystallizer with the disturbance amount can be directly and dynamically adjusted through a flow control valve, and can also be realized by independently setting a disturbance water amount waterway.
Optionally, the crystallizer emergency state water inlet subsystem comprises a check valve and a water inlet pipeline.
Optionally, before the pipeline of the water inlet system of the crystallizer is connected to the crystallizer, a local pressure gauge and a temperature sensor are installed.
Alternatively, the temperature sensor has a function of transmitting the measured temperature of the cooling water of the crystallizer to a P L C (programmable logic controller) and a high temperature alarm function, and when the temperature of the inlet water of the cooling water is higher than a certain temperature, such as 40 ℃, an alarm signal is sent to the P L C.
A crystallizer system is characterized in that a crystallizer copper plate, a crystallizer water seam, crystallizer cooling water and a crystallizer back plate are sequentially arranged along the direction away from an inner cavity of a crystallizer.
Optionally, the crystallizer water gap is formed by a gap between a crystallizer back plate and a crystallizer copper plate, and crystallizer cooling water flows through the crystallizer water gap and continuously takes away heat.
A crystallizer water outlet system comprises a temperature sensor, a flow sensor and a water outlet pipeline.
Optionally, the temperature sensor has a function of remotely transmitting the measured temperature To the P L C system, and the temperature sensor has a temperature difference alarm function of transmitting an alarm signal To the P L C system when the temperature difference To-Ti between the water temperature To of the crystallizer water outlet system and the water temperature Ti of the crystallizer water inlet system is greater than a certain value, such as 10 ℃.
Alternatively, the flow sensor may have a function of transmitting a flow signal to the P L C system, and the flow sensor may have a function of transmitting a high flow alarm signal to the P L C system when the flow rate is greater than the set point by more than a certain limit, such as more than 110% of the set point, or transmitting a low flow alarm signal to the P L C system when the flow rate is less than the set point by a certain limit, such as less than 90% of the set point.
The utility model discloses a theory of operation: the flowing form of the crystallizer water in the water gap of the crystallizer is changed from a laminar flow mode to a turbulent flow mode, so that the boundary layer of the crystallizer cooling water on the surface of the crystallizer copper plate is reduced or eliminated, the thermal resistance between the copper plate and the crystallizer copper plate is further reduced, the heat transfer effect is improved, and the thickness and the strength of the blank shell in the crystallizer are improved.
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 (6)
1. A control system of crystallizer water of a continuous casting machine is characterized in that: the system comprises a crystallizer water inlet system, a crystallizer system and a crystallizer water outlet system which are connected in sequence and used for water quantity disturbance;
the crystallizer water inlet system comprises a crystallizer normal state water inlet subsystem and a crystallizer emergency state water inlet subsystem;
the crystallizer water outlet system comprises a temperature sensor II, a flow sensor and a water outlet pipeline.
2. The control system of crystallizer water of continuous casting machine according to claim 1, characterized in that: the crystallizer normal state water inlet subsystem comprises a pneumatic regulating valve for remote regulation, a check valve and a water inlet pipeline.
3. The control system of crystallizer water of continuous casting machine according to claim 1, characterized in that: the crystallizer emergency state water inlet subsystem comprises a check valve and a water inlet pipeline.
4. The control system of crystallizer water of continuous casting machine according to claim 1, characterized in that: and a local pressure gauge and a temperature sensor I are arranged between the crystallizer water inlet system and the crystallizer system.
5. The control system of crystallizer water of continuous casting machine according to claim 1, characterized in that: in the crystallizer system, a crystallizer copper plate, a crystallizer water seam, crystallizer cooling water and a crystallizer back plate are sequentially arranged along the direction far away from the inner cavity of the crystallizer.
6. The control system of crystallizer water of continuous casting machine according to claim 5, characterized in that: the crystallizer water gap is formed by a crystallizer back plate and a crystallizer copper plate gap and is used for enabling crystallizer cooling water to flow through the crystallizer water gap and continuously taking away heat.
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| CN201921617988.0U CN211028014U (en) | 2019-09-26 | 2019-09-26 | Control system of crystallizer water of continuous casting machine |
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| CN201921617988.0U CN211028014U (en) | 2019-09-26 | 2019-09-26 | Control system of crystallizer water of continuous casting machine |
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| CN211028014U true CN211028014U (en) | 2020-07-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110576160A (en) * | 2019-09-26 | 2019-12-17 | 中冶赛迪工程技术股份有限公司 | control system and method for crystallizer water of continuous casting machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110576160A (en) * | 2019-09-26 | 2019-12-17 | 中冶赛迪工程技术股份有限公司 | control system and method for crystallizer water of continuous casting machine |
| CN110576160B (en) * | 2019-09-26 | 2024-07-30 | 中冶赛迪工程技术股份有限公司 | Control system and method for crystallizer water of continuous casting machine |
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