CN203030856U - Automatic control device for secondary cooling of continuous casting machine - Google Patents
Automatic control device for secondary cooling of continuous casting machine Download PDFInfo
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- CN203030856U CN203030856U CN 201220745519 CN201220745519U CN203030856U CN 203030856 U CN203030856 U CN 203030856U CN 201220745519 CN201220745519 CN 201220745519 CN 201220745519 U CN201220745519 U CN 201220745519U CN 203030856 U CN203030856 U CN 203030856U
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- module
- comparator
- compressed air
- control device
- secondary cooling
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Abstract
Disclosed is an automatic control device for secondary cooling of a continuous casting machine. A reference pressure set value module is connected with the input end of a comparator, the output end of the comparator is connected with the input end of a proportion integration differentiation (PID) controller, the output end of the PID controller is connected with a control input end interface of a control valve through a data line, a control output end interface of the control valve is connected with a temperature regulating object module through a data line, and a pressure detection module is arranged between the temperature regulating object module and the comparator. The automatic control device is characterized in that a compressed air temperature comparison module is provided and connected with the input end of the comparator through a temperature difference regulating coefficient module. According to the automatic control device, compressed air temperature fluctuation is controlled as eliminable disturbance, and the response speed of secondary cooling to the compressed air temperature fluctuation is increased. By means of the automatic control device, the working pressure of compressed air can be changed quickly to compensate effects of the compressed air temperature fluctuation on surface temperatures of casting blanks, and the defect that control factors are not considered comprehensively in existing control devices is overcome.
Description
Technical field
The utility model belongs to conticaster secondary cooling controller technology.
Background technology
Continuous casting installation for casting is widely used in metallurgy industry at present.Usually, continuous casting process is: molten steel is through excessive bag, and middle bag is injected in the crystallizer, through once entering secondary cooling zone after the cooling, forms the strand that has the liquid core at secondary cooling zone through secondary cooling back in crystallizer.
How the high-quality work of efficient stable is the problem that people pay close attention to always to conticaster, the secondary intensity of cooling is improper can be influenced cc billet surface quality even bring out bleed-out, so the secondary of application of advanced cooling control strategy is the key that improves slab quality, improves casting efficient.
The secondary cooling control system is one of key factor of conticaster efficient stable production in the conticaster production of metallurgical industry, and the present two cold aerosol types of cooling that but mostly are are namely come strand is cooled off by cooling water and compressed-air actuated acting in conjunction.
In the fast development along with science and technology, the disturbance factor that the control of the water distribution quantity of two cold-zones is introduced was more and more comprehensive in recent years, as liquid steel temperature fluctuation, degree of superheat fluctuation, secondary cooling water fluctuating temperature etc.
The control principle control method of two advanced cold controls can be summarized as following expression at present:
Q
i=a
iv
2+?b
iv+c
i+D
iΔT
1+E
iΔT
2
Wherein, Qi represents the water yield of two cold certain cooling section, and unit is L/min, and a, b, c are that two cold models calculate the pulling rate coefficient that obtains; Δ T
1Expression degree of superheat undulating value, D
iExpression degree of superheat coefficient; E
iBe secondary cooling water temperature coefficient, Δ T
2Expression degree of superheat undulating value.
Number be the utility model patent of CN 201922012 U with the device of overheated introducing control control system as the Granted publication of authorizing on August 10th, 2011, this device is introduced molten steel overheat in the control device by continuous temperature measurement, changes two cold water distribution quantities according to the degree of superheat.
Though the governing factor that present advanced person's two cold controls are considered is a lot, these governing factors all consider also do not have control device that control system is introduced in the variation influence that cooling produces to secondary of compressed air temperature at present at cooling water.
Summary of the invention
The purpose of this utility model is a kind of conticaster secondary cooling of exploitation automaton, being intended to eliminate compressed air temperature fluctuation that the environment temperature acute variation causes to the influence of casting safety and slab quality, is that the natural labor of conticaster high yield improves strong technical support.
The purpose of this utility model is realized by following mode:
The conticaster secondary cooling automaton that the utility model provides is provided with reference pressure setting value module, and it links to each other with comparator input terminal, and the output of this comparator links to each other with PID controller input; The output of the controller of PID is linked to each other with the control input end interface of control valve by data wire, the control output end interface of control valve is linked to each other with the temperature adjusting object module by data wire, between temperature adjusting object and comparator, be provided with the pressure detecting module, it is characterized in that: be provided with the compressed air temperature comparison module, it links to each other with comparator input terminal by temperature difference adjustment factor module.
The utlity model has following advantage:
In actual production, the acute variation of environment temperature can cause fluctuating widely of compressed air temperature, and making two cold but intensity and actual not the matching of production influences casting blank surface temperature, finally causes slab quality decline even brings out bleed-out.Because compressed air temperature is (by the mounting temperature sensor on compressed-air line) that can measure, the temperature survey amount participates in the acute variation influence that cooling produces to secondary that environment temperature can be effectively eliminated in two cold controls as the governing factor of pneumatically operated pressure, finally reach stable casting blank surface temperature, stablize slab quality, reduce the purpose of breakout ratio.
The utility model is controlled the compressed air temperature fluctuation as a kind of eliminable disturbance, strengthened the response speed of secondary cooling to the compressed air temperature fluctuation.
The utility model can be rapidly compensate the compressed air temperature fluctuation to the influence that casting blank surface temperature produces by changing pneumatically operated pressure, overcomes in the present control device governing factor and considers incomplete weak point.
Description of drawings:
Fig. 1 is continuous casting process figure of the present utility model;
Fig. 2 is that the utility model is based on the control device block diagram of two cold compression air themperatures;
The big bag of 1-wraps among the 2-, 3-crystallizer, 4-secondary cooling zone territory.
The specific embodiment:
Embodiment 1:
A kind of conticaster secondary cooling automaton is provided with reference pressure setting value module, and it links to each other with comparator input terminal, and the output of this comparator links to each other with PID controller input; The output of the controller of PID is linked to each other with the control input end interface of control valve by data wire, the control output end interface of control valve is linked to each other with the temperature adjusting object module by data wire, between temperature adjusting object and comparator, be provided with the pressure detecting module, it is characterized in that: be provided with the compressed air temperature comparison module, it links to each other with comparator input terminal by temperature difference adjustment factor module.
Described compressed air temperature module, its effect are to determine the compressed air fiducial temperature, and it is relevant with on-the-spot steel grade.
Described temperature difference adjustment factor is the adjustment factor that technology provides according to different steel grades.
Described pressure setting module is the pressure set points that technology is set according to different steel grades.
Described PID controller, its effect are that control system is carried out bias adjustment, make the compressed-air actuated operating pressure in two cold-zones consistent with the predetermined value of technological requirement.
Described control valve, its effect are that the pneumatically operated pressure in on-the-spot two cold-zones is directly regulated;
Described pressure controlled plant module is the pneumatically operated pressure that is conditioned according to the technological requirement setting;
Described temperature adjusting object module is the board briquette according to the setting of technological requirement;
Described pressure detecting module, its effect are to detect on-the-spot two cold-zone actual compression air operating pressures, feed back to comparator.
The utility model provides a kind of conticaster secondary cooling automaton, calculate actual temperature with the difference between the fiducial temperature by the compressed air temperature module, obtain the pressure compensation amount jointly with temperature difference adjustment factor, compare with pressure set points sum and the on-the-spot two cold-zone compressed air actual values that detect, obtain the pressure divergence value relatively, deviate controls to adjust the action of valve through the PID controller, and then regulates the pneumatically operated pressure in two cold-zones, finally controls board briquette.
Claims (1)
1. a conticaster secondary cooling automaton is provided with reference pressure setting value module, and it links to each other with comparator input terminal, and the output of this comparator links to each other with PID controller input; The output of the controller of PID is linked to each other with the control input end interface of control valve by data wire, the control output end interface of control valve is linked to each other with the temperature adjusting object module by data wire, between temperature adjusting object and comparator, be provided with the pressure detecting module, it is characterized in that: be provided with the compressed air temperature comparison module, it links to each other with comparator input terminal by temperature difference adjustment factor module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220745519 CN203030856U (en) | 2012-12-31 | 2012-12-31 | Automatic control device for secondary cooling of continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220745519 CN203030856U (en) | 2012-12-31 | 2012-12-31 | Automatic control device for secondary cooling of continuous casting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203030856U true CN203030856U (en) | 2013-07-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220745519 Expired - Lifetime CN203030856U (en) | 2012-12-31 | 2012-12-31 | Automatic control device for secondary cooling of continuous casting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203030856U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114406227A (en) * | 2022-01-27 | 2022-04-29 | 山东莱钢永锋钢铁有限公司 | Water distribution operation method for secondary cooling section of billet continuous casting machine |
-
2012
- 2012-12-31 CN CN 201220745519 patent/CN203030856U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114406227A (en) * | 2022-01-27 | 2022-04-29 | 山东莱钢永锋钢铁有限公司 | Water distribution operation method for secondary cooling section of billet continuous casting machine |
| CN114406227B (en) * | 2022-01-27 | 2023-09-12 | 山东莱钢永锋钢铁有限公司 | Two-cooling-section water distribution operation method for small square billet continuous casting machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |
|
| CX01 | Expiry of patent term |