CN103882189B - A kind of efficiently Quenching Sheet quenching technical - Google Patents
A kind of efficiently Quenching Sheet quenching technical Download PDFInfo
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- CN103882189B CN103882189B CN201410110375.3A CN201410110375A CN103882189B CN 103882189 B CN103882189 B CN 103882189B CN 201410110375 A CN201410110375 A CN 201410110375A CN 103882189 B CN103882189 B CN 103882189B
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Abstract
Present invention process relates to the technical field that heat-treatment furnace Quenching Sheet produces, and is a kind of for Quenching Sheet rapid quenching, and can guarantee that an edition type glacing flatness meets technological requirement, it is achieved efficient, the new technology of continuous quenching.Total involvement rhythm of production management and control, plugman is included in rhythm of production management and control, plugman determines quantity and the time opening pump in advance according to the production schedule, governing speed is improved by change valve driving machine step aperture, with satisfied production needs, key equipment is adjusted to adaptation rhythm of production pattern, gives full play to equipment potential.Comply fully with heat treatment quenching process, it is possible to realize efficiently quenching production, meets technological requirement, shorten cool time and quenching water consumption, improve rhythm of production and heat-treatment furnace yield.
Description
Technical field
Present invention process relates to the technical field that heat-treatment furnace Quenching Sheet produces, and is a kind of for Quenching Sheet rapid quenching, and can guarantee that an edition type glacing flatness meets technological requirement, it is achieved efficient, the new technology of continuous quenching.
Background technology
When Quenching Sheet produces, the state of supply of the water tower water yield and quenching press quenching flow process valve regulating time produce with Quenching Sheet and have extremely close relation, in order to prevent, the water tower water yield is under-supply, affect steel plate quenching with quenching press flow process valve regulating time not in time, impact produces, and has invented this efficient, quenching technical.
Current quenching process, water pump teams and groups are not involved in producing control, rhythm of production management and control is all completed by glowing furnace operative employee, Quenching Sheet produce before 8-10 minute, glowing furnace produces work prior notice plugman needs to produce specification and the steel grade of steel plate, and plugman determines water tower pump, the unlatching quantity of elevator pump and time according to the specification of water tower level height, water tower pump performance and steel plate to be produced.Quenching water circulation system stable water pressure, after flow is normal, quenching press runoff investigation valve starts to be automatically adjusted to set water yield value.
Current quenching technical, often as new water injection causes water circulation system to be unsatisfactory for quenching condition not in time and valve regulated overlong time affects quenched nickelclad and produces.
Summary of the invention
The present invention provides a kind of efficiently Quenching Sheet quenching technical, is proved by the production practices of nearly half a year, and this method complies fully with heat treatment quenching process, it is capable of the production that efficiently quenches, meet technological requirement, shorten cool time and quenching water consumption, improve rhythm of production and heat-treatment furnace yield.
The technical scheme is that
A kind of efficiently Quenching Sheet quenching technical, it is characterized in that: total involvement rhythm of production management and control, plugman is included in rhythm of production management and control, plugman determines quantity and the time opening pump in advance according to the production schedule, governing speed is improved by change valve driving machine step aperture, with satisfied production needs, key equipment is adjusted to adaptation rhythm of production pattern, gives full play to equipment potential.
A kind of efficiently Quenching Sheet quenching technical, its processing step is: plugman participates in management and control rhythm of production according to the production schedule,
When producing thickness >=40mm steel plate, within 8-10 minute in advance, open water compensating valve, make the new water of production supplement in advance, 5 minutes in advance unlatching water tower pumps two, high-pressure pump one；
The open and close of elevator pump then show manual control according to the liquid level of regulating reservoir and absorbing well, absorption well, and when regulating reservoir water level is less than 3.5 meters, elevator pump must shut off；When regulating reservoir water level is when 3.5 meters-5.5 meters and absorbing well, absorption well water level are below 5.5 meters, open an elevator pump；When regulating reservoir water level more than 5.5 meters and absorbing well, absorption well water level below 5.5 meters time open two elevator pumps；
Quenching press runoff investigation valve controls the water yield by PID control method, and PID controller is made up of proportional unit (P), integral unit (I) and differentiation element (D), and its input e (t) with the relation of output u (t) is:
In u (t)=kp [e (t)+1/TI ∫ e (t) dt+TD*de (t)/dt] formula, the bound of integration is 0 and t respectively；
Its transmission function is: G (s)=U (s)/E (s)=kp [1+1/ (TI*s)+TD*s]
Wherein kp is proportionality coefficient, and TI is integration time constant, and TD is derivative time constant；
Step aperture is the ratio K=P/(I*D of PID systematic parameter),
P-difference signal amplification coefficient, after I-amplification, the time of integration of difference signal, D-provides the time of regulation action in advance according to difference signal rate of change；
Difference signal amplification coefficient P=40-100%, integral differential time T=6-60s；
Step response refers to that Stepped Impedance Resonators is added to the output of system time in PID system.
Steel plate is before quenching, need each section of water yield in quenching press is remedied to setting value, the water yield is corrected actuator aperture and water yield size write DB module, and updating water yield step aperture by PDA real time record is 0.2%, institute's water requirement can recall and send to water yield correction actuator from DB module, can shorten 0.5-1 minute correction time of the water yield.
Difference signal amplification coefficient P=65-80%, integration and T=25-50s derivative time.
The preferred value of K is, K=0.18-0.22%.
The preferred value of K is, K=0.2%.
Water tower water quantity holding is between 51.4 to 53.7 meters.
When producing thickness less than 40mm steel plate, within 3-5 minute in advance, open water compensating valve, 5 minutes in advance unlatching water tower pumps one, high-pressure pump two.
The invention have the benefit that
By above method with according to Field adjustment experience, when drawing difference amplification coefficient P=65-80%, integration and T=25-50s derivative time and K=0.2%, both can guarantee that valve driving machine governing speed, and can guarantee that again the water yield is steady in a long-term, fully meet quenching technical and Production requirement.
For making valve regulated rapider, can suitably increase P(difference signal amplification coefficient), for making valve opening and discharge more stably can suitably increase after I(amplifies time of integration of difference signal), D(provide time of regulation action in advance according to difference signal rate of change), governing speed, stationary flow amount is improved, with satisfied production needs by change valve driving machine step response.
This technique shows the open and close setting elevator pump not only by simple liquid level, also on the basis of the chain control of liquid level, play post worker's subjective initiative, plugman produces the mutually coordinated good industrial water amount of work, cool time with glowing furnace, with reference to elevator pump and water tower pump capacity size, the compound mode of refinement pump, determines quantity and the time opening water tower pump.Water processes operating system and ensures that water tower water quantity holding, between 51.4 to 53.7 meters, keeps relative equilibrium between inflow and the water yield of water tower.Optimize water regulating valve doorsteps to jump aperture simultaneously, reduce the water yield improvement time, reach to improve the purpose of quenching efficiency.
By the process of the present invention, it is ensured that after steel plate is heated to the stipulated time in heating furnace, quenching water circulation system has met total hardening condition, it is not necessary to wait is the most hardenable, shortens the quenching waiting time.Moisturizing time when can effectively reduce thick steel plates；Effectively reduce quenching early gate and adjust the time, maintain the water yield to fluctuate in little scope.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention；
Fig. 2 is that quenching system water circulates schematic diagram.
Detailed description of the invention
Below by specific embodiment, technical scheme is described in detail.
Fig. 1 is the process chart of the present invention, wherein 1 is that plugman produces the specification and steel grade produced needed for work ditch is had friendly relations with glowing furnace, 2 for determining water tower pump, elevator pump opens quantity and time, 3 is that water treatment system is ready, etc. to be quenched, 4 confirm to wait steel grade and the thickness of quenched nickelclad for glowing furnace operative employee, 5 for have friendly relations whether meet quenching condition with plugman's ditch, 6 for confirm errorless after, open quenching program, 7 start regulation for runoff investigation valve, discharge is made to be adjusted to set the water yield, after 8 start for quenching, because the factor such as discharge and water pressure fluctuations affects, in quenching process, runoff investigation valve repairs the water yield in regulation all the time, 9 complete for quenching.
The step aperture of water regulating valve affects regulating time, when determining step aperture, is the optimal step aperture by constantly experiment and various trials draw.When step aperture is 0.15%, water regulating valve accuracy is high, but the change time is slower；Step aperture is that 0.20% runoff investigation velocity adaptive produces, and water yield precision can meet runoff investigation when technological requirement step aperture is 0.25% and be exceedingly fast, but it is big to easily cause water yield fluctuation.Therefore show that optimal step aperture is 0.20%.
After Fig. 2 water circular order is for producing new water entrance absorbing well, absorption well, being promoted to high-order water tower by water tower pump, high-order water tower water, by high pressure pump flow current direction regulating reservoir after quenching press, quenching, is again introduced into absorbing well, absorption well by elevator pump.The unlatching quantity how controlling water tower pump and elevator pump in quenching process is to ensure that the key producing Quenching Sheet continuously with the time.
Embodiment 1
The efficient Quenching Sheet quenching technical of the present invention, total involvement rhythm of production management and control, plugman is included in rhythm of production management and control, when producing thickness >=40mm steel plate, within 8-10 minute in advance, open water compensating valve, make the new water of production supplement in advance, 5 minutes in advance unlatching water tower pumps two, high-pressure pump one.
The open and close of elevator pump then show manual control according to the liquid level of regulating reservoir and absorbing well, absorption well, and when regulating reservoir water level is less than 3.5 meters, elevator pump must shut off；When regulating reservoir water level is when 3.5 meters-5.5 meters and absorbing well, absorption well water level are below 5.5 meters, open an elevator pump；When regulating reservoir water level more than 5.5 meters and absorbing well, absorption well water level below 5.5 meters time open two elevator pumps.
Improving governing speed by change valve driving machine step aperture, with satisfied production needs, key equipment is adjusted to adaptation rhythm of production pattern, gives full play to equipment potential.
Quenching press runoff investigation valve controls the water yield by PID control method, and PID controller is made up of proportional unit (P), integral unit (I) and differentiation element (D), and its input e (t) with the relation of output u (t) is:
In u (t)=kp [e (t)+1/TI ∫ e (t) dt+TD*de (t)/dt] formula, the bound of integration is 0 and t respectively；
Its transmission function is: G (s)=U (s)/E (s)=kp [1+1/ (TI*s)+TD*s]
Wherein kp is proportionality coefficient, and TI is integration time constant, and TD is derivative time constant；
Step aperture is the ratio K=P/(I*D of PID systematic parameter),
P-difference signal amplification coefficient, after I-amplification, the time of integration of difference signal, D-provides the time of regulation action in advance according to difference signal rate of change；
Difference signal amplification coefficient P=40-100%, integral differential time T=6-60s；
Step response refers to that Stepped Impedance Resonators is added to the output of system time in PID system.
Steel plate is before quenching, need each section of water yield in quenching press is remedied to setting value, the water yield is corrected actuator aperture and water yield size write DB module, and updating water yield step aperture by PDA real time record is 0.2%, institute's water requirement can recall and send to water yield correction actuator from DB module, can shorten 0.5-1 minute correction time of the water yield.
As preferably, difference signal amplification coefficient P=65-80%, integration and T=25-50s derivative time.
Embodiment 2
When producing thickness less than 40mm steel plate, within 3-5 minute in advance, open water compensating valve, 5 minutes in advance unlatching water tower pumps one, high-pressure pump two.
Other steps are with embodiment 1.
Claims (7)
1. a Quenching Sheet quenching technical, it is characterized in that: total involvement rhythm of production management and control, plugman is included in rhythm of production management and control, plugman determines quantity and the time opening pump in advance according to the production schedule, governing speed is improved by change valve driving machine step aperture, with satisfied production needs, key equipment is adjusted to adaptation rhythm of production pattern, gives full play to equipment potential；
When producing thickness >=40mm steel plate, within 8-10 minute in advance, open water compensating valve, make the new water of production supplement in advance, 5 minutes in advance unlatching water tower pumps two, high-pressure pump one；
The open and close of elevator pump then show manual control according to the liquid level of regulating reservoir and absorbing well, absorption well, and when regulating reservoir water level is less than 3.5 meters, elevator pump must shut off；When regulating reservoir water level is when 3.5 meters-5.5 meters and absorbing well, absorption well water level are below 5.5 meters, open an elevator pump；When regulating reservoir water level more than 5.5 meters and absorbing well, absorption well water level below 5.5 meters time open two elevator pumps；Wherein, 5.5 meters is an endpoint value, wherein when 3.5-5.5 rice, comprises 5.5 meters；Time more than 5.5 meters, do not comprise 5.5 meters；
Quenching press runoff investigation valve controls the water yield by PID control method, and PID controller is made up of proportional unit (P), integral unit (I) and differentiation element (D), and its input e (t) with the relation of output u (t) is:
In u (t)=kp [e (t)+1/TI ∫ e (t) dt+TD*de (t)/dt] formula, the bound of integration is 0 and t respectively；
Its transmission function is: G (s)=U (s)/E (s)=kp [1+1/ (TI*s)+TD*s]
Wherein kp is proportionality coefficient, and TI is integration time constant, and TD is derivative time constant；
Step aperture is the ratio K=P/(I*D of PID systematic parameter),
P-difference signal amplification coefficient, after I-amplification, the time of integration of difference signal, D-provides the time of regulation action in advance according to difference signal rate of change；
Difference signal amplification coefficient P=40-100%, integral differential time T=6-60s；
Step response refers to that Stepped Impedance Resonators is added to the output of system time in PID system.
Quenching Sheet quenching technical the most according to claim 1, it is characterized in that, steel plate is before quenching, need each section of water yield in quenching press is remedied to setting value, the water yield is corrected actuator aperture and water yield size write DB module, and updating water yield step aperture by PDA real time record is 0.2%, institute's water requirement recalls and sends to water yield correction actuator from DB module.
Quenching Sheet quenching technical the most according to claim 1, it is characterised in that difference signal amplification coefficient P=65-80%, integration and T=25-50s derivative time.
Quenching Sheet quenching technical the most according to claim 1, it is characterised in that K value is, K=0.18-0.22%.
Quenching Sheet quenching technical the most according to claim 4, it is characterised in that K value is K=0.2%.
Quenching Sheet quenching technical the most according to claim 1, it is characterised in that water tower water quantity holding is between 51.4 to 53.7 meters.
Quenching Sheet quenching technical the most according to claim 1, it is characterised in that when producing thickness less than 40mm steel plate, opens water compensating valve, 5 minutes in advance unlatching water tower pumps one, high-pressure pump two for 3-5 minute in advance.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202030792U (en) * | 2011-03-17 | 2011-11-09 | 南京钢铁股份有限公司 | Water processing device for medium plate quenching line |
| CN103605390A (en) * | 2013-10-16 | 2014-02-26 | 东北大学 | Water supply control method of hot continuous rolling line ultra fast cooling system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202030792U (en) * | 2011-03-17 | 2011-11-09 | 南京钢铁股份有限公司 | Water processing device for medium plate quenching line |
| CN103605390A (en) * | 2013-10-16 | 2014-02-26 | 东北大学 | Water supply control method of hot continuous rolling line ultra fast cooling system |
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Inventor after: Liu Yangyang Inventor after: Tang Wenbo Inventor after: Yu Yanfei Inventor after: Wang Dezhi Inventor after: Zhang Ning Inventor after: Li Fulei Inventor after: Zhang Guangchuan Inventor after: Xie Hui Inventor after: Liu Haibo Inventor after: Li Wenhua Inventor before: Liu Yangyang Inventor before: Tang Wenbo Inventor before: Wang Bing Inventor before: Kong Ya Inventor before: Zhang Ning Inventor before: Li Fulei Inventor before: Zhang Guangchuan Inventor before: Xie Hui Inventor before: Liu Haibo Inventor before: Li Wenhua |
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Free format text: CORRECT: INVENTOR; FROM: LIU YANGYANG WANG BING KONG YA ZHANG NING LI FULEI ZHANG GUANGCHUAN XIE HUI LIU HAIBO LI WENHUA TANG WENBO TO: LIU YANGYANG YU YANFEI WANG DEZHI ZHANG NING LI FULEI ZHANG GUANGCHUAN XIE HUI LIU HAIBO LI WENHUA TANG WENBO |
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