CN103882189A - High-efficiency quenching process of quenched plate - Google Patents
High-efficiency quenching process of quenched plate Download PDFInfo
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- CN103882189A CN103882189A CN201410110375.3A CN201410110375A CN103882189A CN 103882189 A CN103882189 A CN 103882189A CN 201410110375 A CN201410110375 A CN 201410110375A CN 103882189 A CN103882189 A CN 103882189A
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Abstract
The invention relates to the technical field of the production of heat treatment furnace quenched plates, and provides a new process for high-efficiency continuous quenching which is used for carrying out quick quenching of a quenched plate and is capable of guaranteeing that the straightness of the plate meets the technical requirement. All the personnel join in production rhythm control, and a plugman who joins in the production rhythm control determines the number of pumps turned on and the time of turning on in advance according to a production plan; and the regulation speed is increased by changing the step opening of a valve motor to meet the production requirements, a key device is adjusted into a mode most adaptive to the production rhythm, and the potential of the device is developed thoroughly. The high-efficiency quenching process is completely in accordance with a heat treatment quenching process, and further is capable of realizing high-efficiency quenching production and meeting the technological requirements, and as a result, the quenching time is shortened and the amount of water used for quenching is reduced, and the production rhythm and the yield of a heat treatment furnace are increased.
Description
Technical field
Technique of the present invention relates to the technical field that heat treatment furnace Quenching Sheet is produced, and is a kind of for Quenching Sheet rapid quenching, and can ensure that version type planeness meets processing requirement, realizes novel process efficient, continuous quenching.
Background technology
In the time that Quenching Sheet is produced, the state of supply of the water tower water yield and quenching press quenching flow process valve regulated time and Quenching Sheet are produced extremely close relation, for preventing that the water tower water yield is under-supply, producing with quenching press flow process valve regulated time effects steel plate quenching, impact not in time, invent this efficient, quenching technology.
Current quenching process, water pump teams and groups do not participate in production control, rhythm of production management and control is all completed by quenching furnance operative employee, 8-10 minute before Quenching Sheet is produced, quenching furnance production work prior notice plugman need to produce specification and the steel grade of steel plate, and plugman determines unlatching quantity and the time of water tower pump, lift pump according to the specification of water tower level height, water tower pump performance and steel plate to be produced.Quench water recycle system stable water pressure, after flow is normal, quenching press water regulating valve door starts to be automatically adjusted to setting water yield value.
Current quenching technology, often because new water injection causes not in time water circulation system not meet quenching conditions and valve regulated overlong time affects quenched nickelclad production.
Summary of the invention
The invention provides a kind of efficient Quenching Sheet quenching technology, prove by the production practice of nearly half a year, present method meets heat treatment quenching process completely, can realize efficient quenching produces, meet processing requirement, shortened cool time and quenching water consumption, improved rhythm of production and heat treatment furnace output.
Technical scheme of the present invention is:
A kind of efficient Quenching Sheet quenching technology, it is characterized in that: the management and control of total involvement rhythm of production, include plugman in rhythm of production management and control, plugman determines quantity and the time of opening pump in advance according to the production program, improve governing speed by change valve driving machine step aperture, to meet need of production, key equipment is adjusted into and adapts to rhythm of production pattern most, gives full play to equipment potential.
A kind of efficient Quenching Sheet quenching technology, its processing step is: plugman participates in management and control rhythm of production according to the production program,
In the time producing thickness >=40mm steel plate, within 8-10 minute in advance, open water compensating valve, supplement two of 5 minutes in advance unlatching water tower pumps, one of high-pressure pump before making to produce new water extraction;
The open and close of lift pump show manual control according to the liquid level of equalizing tank and suction well, and when equalizing tank water level is during lower than 3.5 meters, lift pump must cut out; When equalizing tank water level is in the time that 3.5 meters-5.5 meters and suction well water level are below 5.5 meters, open a lift pump; When equalizing tank water level more than 5.5 meters and suction well water level open two lift pumps below 5.5 meters time;
Quenching press water regulating valve door is by the PID control method control water yield, and PID controller is made up of ratio unit (P), integral unit (I) and differentiation element (D), and its input e (t) with the pass of output u (t) is:
U (t)=kp[e (t)+1/TI ∫ e (t) dt+TD*de (t)/dt] bound of integration is respectively 0 and t in formula;
Its transport function is: G (s)=U (s)/E (s)=kp[1+1/ (TI*s)+TD*s]
Wherein kp is scale-up factor, and TI is integration time constant, and TD is derivative time constant;
Step aperture is the ratio K=P/(I*D of PID system parameter),
P-difference signal scale-up factor, after I-amplifies, the integral time of difference signal, D-provides the time that regulates action in advance according to difference signal rate of change;
Difference signal scale-up factor P=40-100%, integral differential time T=6-60s;
Step response refers to the output of system when step input is added in PID system.
Steel plate is before quenching, the each section of water yield in quenching press need to be remedied to set(ting)value, the water yield is proofreaied and correct to topworks's aperture and water yield size writes DB module, and upgrading water yield step aperture by PDA real time record is 0.2%, institute's water requirement can recall and send to the water yield from DB module and proofread and correct topworks, can shorten water yield 0.5-1 minute setting time.
Difference signal scale-up factor P=65-80%, integration and differentiation time T=25-50s.
The preferred value of K is, K=0.18-0.22%.
The preferred value of K is, K=0.2%.
The water tower water yield remains between 51.4 to 53.7 meters.
When producing thickness while being less than 40mm steel plate, within 3-5 minute in advance, open water compensating valve, one of 5 minutes in advance unlatching water tower pump, two of high-pressure pump.
Beneficial effect of the present invention is:
By above method with according to Field adjustment experience, while drawing difference scale-up factor P=65-80%, integration and differentiation time T=25-50s and K=0.2%, can ensure valve driving machine governing speed, can ensure again water yield long-term stability to meet quenching technology and Production requirement completely.
For making valve regulated rapider, can suitably increase P(difference signal scale-up factor), for the integral time of difference signal after making that valve opening and discharge are more stable and can suitably increasing I(and amplify), D(provides the time that regulates action in advance according to difference signal rate of change), improve governing speed, stationary flow amount by change valve driving machine step response, to meet need of production.
This technique not only shows to set the open and close of lift pump by simple liquid level, also on the basis of the chain control of liquid level, performance post worker's subjective initiative, plugman and quenching furnance production work are coordinated water of productive use amount, cool time mutually, simultaneously with reference to lift pump and water tower pump capacity size, the array mode of refinement pump, determines quantity and the time of opening water tower pump.Water treatment operating system ensures that the water tower water yield remains between 51.4 to 53.7 meters, keeps relative equilibrium between the flooding quantity of water tower and aquifer yield.Optimize the water regulating valve doorsteps aperture that jumps simultaneously, reduce the water yield improvement time, reach the object that improves quenching efficiency.
By processing method of the present invention, can ensure that steel plate was heated to after the specified time in process furnace, the quench water recycle system has met total hardening condition, hardenable without waiting for, has shortened the quenching waiting time.The moisturizing time can effectively reduce thick steel plates time; Effectively reduce quenching early gate and adjust the time, maintain the water yield and fluctuate among a small circle.
Brief description of the drawings
Fig. 1 is process flow sheet of the present invention;
Fig. 2 is quench systems water cycle schematic diagram.
Embodiment
Below by specific embodiment, technical scheme of the present invention is described in detail.
Fig. 1 is process flow sheet of the present invention, wherein 1 is plugman and quenching furnance production work ditch have friendly relations specification and the steel grade of required production, 2 for determining water tower pump, lift pump is opened quantity and time, 3 is that water treatment system is ready, wait for and quenching, 4 confirm to wait for steel grade and the thickness of quenched nickelclad for quenching furnance operative employee, 5 for to have friendly relations whether meet quenching conditions with plugman's ditch, 6 for confirm errorless after, open quenching program, 7 for water regulating valve door start regulate, make discharge be adjusted to the setting water yield, 8 is after quenching starts, because of the impact of the factor such as discharge and water pressure fluctuations, in quenching process, water regulating valve door is regulating the reparation water yield all the time, 9 for to have quenched.
The step aperture of water regulating valve affects the adjusting time, in the time of definite step aperture, is the best step aperture drawing by continuous experiment and various trial.When step aperture is 0.15%, water regulating valve accuracy is high, but the change time is slower; Step aperture is that 0.20% water yield governing speed adapts to produce, and when water yield precision can meet processing requirement step aperture and is 0.25%, the water yield regulates and is exceedingly fast, but easily causes water yield fluctuation large.Therefore show that best step aperture is 0.20%.
Fig. 2 water cycle order enters after suction well for producing new water, is promoted to high-order water tower by water tower pump, and high-order water tower water flows to quenching press by high-pressure pump, and current direction equalizing tank after quenching, enters suction well again by lift pump.Unlatching quantity and time in quenching process, how to control water tower pump and lift pump are the keys that ensures continuous production Quenching Sheet.
embodiment 1
Efficient Quenching Sheet quenching technology of the present invention, the management and control of total involvement rhythm of production, includes plugman in rhythm of production management and control, in the time producing thickness >=40mm steel plate, within 8-10 minute in advance, open water compensating valve, supplement before making to produce new water extraction, two of 5 minutes in advance unlatching water tower pumps, one of high-pressure pump.
The open and close of lift pump show manual control according to the liquid level of equalizing tank and suction well, and when equalizing tank water level is during lower than 3.5 meters, lift pump must cut out; When equalizing tank water level is in the time that 3.5 meters-5.5 meters and suction well water level are below 5.5 meters, open a lift pump; When equalizing tank water level more than 5.5 meters and suction well water level open two lift pumps below 5.5 meters time.
Improve governing speed by change valve driving machine step aperture, to meet need of production, key equipment is adjusted into and adapts to rhythm of production pattern most, gives full play to equipment potential.
Quenching press water regulating valve door is by the PID control method control water yield, and PID controller is made up of ratio unit (P), integral unit (I) and differentiation element (D), and its input e (t) with the pass of output u (t) is:
U (t)=kp[e (t)+1/TI ∫ e (t) dt+TD*de (t)/dt] bound of integration is respectively 0 and t in formula;
Its transport function is: G (s)=U (s)/E (s)=kp[1+1/ (TI*s)+TD*s]
Wherein kp is scale-up factor, and TI is integration time constant, and TD is derivative time constant;
Step aperture is the ratio K=P/(I*D of PID system parameter),
P-difference signal scale-up factor, after I-amplifies, the integral time of difference signal, D-provides the time that regulates action in advance according to difference signal rate of change;
Difference signal scale-up factor P=40-100%, integral differential time T=6-60s;
Step response refers to the output of system when step input is added in PID system.
Steel plate is before quenching, the each section of water yield in quenching press need to be remedied to set(ting)value, the water yield is proofreaied and correct to topworks's aperture and water yield size writes DB module, and upgrading water yield step aperture by PDA real time record is 0.2%, institute's water requirement can recall and send to the water yield from DB module and proofread and correct topworks, can shorten water yield 0.5-1 minute setting time.
As preferably, difference signal scale-up factor P=65-80%, integration and differentiation time T=25-50s.
embodiment 2
When producing thickness while being less than 40mm steel plate, within 3-5 minute in advance, open water compensating valve, one of 5 minutes in advance unlatching water tower pump, two of high-pressure pump.
Other steps are with embodiment 1.
Claims (8)
1. an efficient Quenching Sheet quenching technology, it is characterized in that: the management and control of total involvement rhythm of production, include plugman in rhythm of production management and control, plugman determines quantity and the time of opening pump in advance according to the production program, improve governing speed by change valve driving machine step aperture, to meet need of production, key equipment is adjusted into and adapts to rhythm of production pattern most, gives full play to equipment potential.
2. efficient Quenching Sheet quenching technology according to claim 1, its processing step is: plugman participates in management and control rhythm of production according to the production program,
In the time producing thickness >=40mm steel plate, within 8-10 minute in advance, open water compensating valve, supplement two of 5 minutes in advance unlatching water tower pumps, one of high-pressure pump before making to produce new water extraction;
The open and close of lift pump show manual control according to the liquid level of equalizing tank and suction well, and when equalizing tank water level is during lower than 3.5 meters, lift pump must cut out; When equalizing tank water level is in the time that 3.5 meters-5.5 meters and suction well water level are below 5.5 meters, open a lift pump; When equalizing tank water level more than 5.5 meters and suction well water level open two lift pumps below 5.5 meters time;
Quenching press water regulating valve door is by the PID control method control water yield, and PID controller is made up of ratio unit (P), integral unit (I) and differentiation element (D), and its input e (t) with the pass of output u (t) is:
U (t)=kp[e (t)+1/TI ∫ e (t) dt+TD*de (t)/dt] bound of integration is respectively 0 and t in formula;
Its transport function is: G (s)=U (s)/E (s)=kp[1+1/ (TI*s)+TD*s]
Wherein kp is scale-up factor, and TI is integration time constant, and TD is derivative time constant;
Step aperture is the ratio K=P/(I*D of PID system parameter),
P-difference signal scale-up factor, after I-amplifies, the integral time of difference signal, D-provides the time that regulates action in advance according to difference signal rate of change;
Difference signal scale-up factor P=40-100%, integral differential time T=6-60s;
Step response refers to the output of system when step input is added in PID system.
3. efficient Quenching Sheet quenching technology according to claim 1 and 2, it is characterized in that, steel plate is before quenching, the each section of water yield in quenching press need to be remedied to set(ting)value, the water yield is proofreaied and correct to topworks's aperture and water yield size writes DB module, and upgrading water yield step aperture by PDA real time record is 0.2%, institute's water requirement can recall and send to the water yield from DB module and proofread and correct topworks.
4. efficient Quenching Sheet quenching technology according to claim 2, is characterized in that, difference signal scale-up factor P=65-80%, integration and differentiation time T=25-50s.
5. efficient Quenching Sheet quenching technology according to claim 2, is characterized in that, K value is, K=0.18-0.22%.
6. efficient Quenching Sheet quenching technology according to claim 5, is characterized in that, K value is K=0.2%.
7. efficient Quenching Sheet quenching technology according to claim 1 and 2, is characterized in that, K value is that the water tower water yield remains between 51.4 to 53.7 meters.
8. efficient Quenching Sheet quenching technology according to claim 2, is characterized in that, K value is, in the time producing thickness and be less than 40mm steel plate, within 3-5 minute in advance, opens water compensating valve, one of 5 minutes in advance unlatching water tower pump, two of high-pressure pump.
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| CN201410110375.3A CN103882189B (en) | 2014-03-24 | 2014-03-24 | A kind of efficiently Quenching Sheet quenching technical |
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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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