CN101856672A - Hot-rolling mill electrical apparatus - Google Patents
Hot-rolling mill electrical apparatus Download PDFInfo
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- CN101856672A CN101856672A CN 201010179951 CN201010179951A CN101856672A CN 101856672 A CN101856672 A CN 101856672A CN 201010179951 CN201010179951 CN 201010179951 CN 201010179951 A CN201010179951 A CN 201010179951A CN 101856672 A CN101856672 A CN 101856672A
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- hot
- rolling mill
- electrical apparatus
- roll
- pressure
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Abstract
The invention discloses a hot-rolling mill electrical apparatus, comprising a transmission main drive system, a lubricant cooling system, a roll hydraulic system and a stable control system. The roll hydraulic system is controlled by using a programmable logic controller (PLC). The hot-rolling mill electrical apparatus of the invention adopts the programmable logic controller (PLC) to achieve reliable and automatic control and abnormal alarming control of a key process operation control system of the whole hot-rolling device, so that the lifting speed of the hot-rolling is steadier, the pressure is automatically constant and adjustable, the process requirement of smooth degree and homogeneous degree of cloth covers and the influence caused by preventing superhard mechanical impact are greatly improved; and the hot-rolling mill electrical apparatus of the invention adopts a magnetoresistance electrical contact pressure control meter to automatically and rapidly repair a limiting pressure.
Description
Technical field
The present invention relates to a kind of hot-rolling mill electrical apparatus.
Background technology
The Programmable Logic Controller of hot-rolling mill electrical apparatus in the prior art adopts the mode of low voltage control low pressure output, makes the rising or falling speed instability of hot-rolling mill roll, influences that cloth cover is smooth, the technological requirement of the uniformity, causes defectives such as mechanical shock is really up to the mark.
Summary of the invention
The purpose of this invention is to provide a kind of rising or falling speed that makes roll more steadily, the pressure automatic constant is adjustable, the technology of, the uniformity smooth to cloth cover and prevent the mechanical shock hot-rolling mill electrical apparatus that is greatly improved really up to the mark.
The technical scheme that the present invention is adopted for achieving the above object is: hot-rolling mill electrical apparatus, comprise transmission master drive system, and lubricating and cooling system, roll hydraulic system and temperature control system, roll hydraulic system adopt programmable controller PLC control.
Described temperature control system comprises top roll temperature controller and lower roll temperature controller.
Described transmission master drive system comprises the main transmission frequency converter that breaker roll speed is controlled.
Hot-rolling mill electrical apparatus of the present invention adopts Programmable Logic Controller PLC that the critical process operation control system of overall thermal rolling plant is realized reliable control automatically and abnormal alarm control, make the rising or falling speed of hot rolling more steady, the pressure automatic constant is adjustable, the technological requirement of, the uniformity smooth and prevent that the mechanical shock influence that causes really up to the mark is greatly improved to cloth cover, and adopted the control table of magnetic resistance electric contact pressure that limiting pressure is carried out repairing fast automatically.To the requirement of speed stability, adopted the speed of variable frequency controller breaker roll carry out that permanent torque is steadily regulated, speed governing is convenient, flexible, steadily reliable, harmony is good, has alleviated because the influence that drawing-off causes the cloth cover uniformity.The lifting of the inner heat medium temperature of roll is taked Automatic Control and is provided with overtemperature alarm and temperature multiple spot comparison monitoring.Adopt the Japanese import SR90 PID of system adjuster, by to its internal integral time, derivative time, the isoparametric cooperation adjustment of proportional band, and output is adjusted variation automatically with real temperature, the 4-20mA current signal of output, drive the three-phase phase power controller electricity heating circulatory system of complete machine is carried out design temperature, complete intelligent automatic constant-temperature is controlled automatically, has prevented the generation of low temperature or temperature overshot phenomenon.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is main driving of hot-rolling mill electrical apparatus transmission of the present invention and lubricating and cooling system electric diagram;
Fig. 2 is a hot-rolling mill electrical apparatus roll HYDRAULIC CONTROL SYSTEM electric diagram of the present invention;
Fig. 3 is a hot-rolling mill electrical apparatus temperature control system electric diagram of the present invention;
Fig. 4 is a hot-rolling mill electrical apparatus temperature control system electric diagram of the present invention.
The specific embodiment
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, hot-rolling mill electrical apparatus comprises transmission master drive system, lubricating and cooling system, roll hydraulic system and stabilizing control system, the roll liquid system adopts Programmable Logic Controller PLC that it is controlled, temperature control system comprises top roll temperature controller and lower roll temperature controller, transmission master drive system is by the main transmission Frequency Converter Control speed of rolls, main transmission is variable frequency regulating speed control, and it has self-protection and protects by the kinetic energy of controlled motor; Can carry out multi-functional control to motor and frequency converter by the multi-function terminal rim of the mouth of control loop, adapt to and under various environmental conditions, work.Starting main transmission KA8 control and self-locking, speed has external potentiometer to adjust.Coolant pump M5 operates as roll bearing simultaneously the heat radiation cooling is provided.Start upper and lower roll pump M2, M3 when heating agent is heated, conduction oil begins circulation separately.Start the upper and lower roll temperature control button, SCR1, the work of SCR2 three-phase phase power controller begin.By upper and lower roll SR90 temperature controller it is controlled, because the suitable adjustment of instrument PID is made shallow property of its output 4-20mA fully-automatic intelligent control procedure that smoothly heats up, after arriving design temperature, keep temperature constant, be controlled at ± 1 ℃, better satisfy technological requirement.When temperature was higher or lower than normal range (NR), during upper and lower roll heating agent overtemperature, KA12, KA13 action kept the circulation of upper and lower roll heating stopping oil.The PZ buzzer sends abnormal alarm simultaneously.When shut down needing cooling, with the SA2 knob to the position that lowers the temperature, the upper and lower roll circulation, oil pump main transmission keeps operation, the time relay KJ beginning of delaying time.Upper and lower roll is heated and is in halted state, and the stipulated time to be arrived is when being the best chilling temperature of conduction oil, the KT action, and the collection outage is shut down.Prevent to shut down mechanical damage and the High Temperature that brings when temperature is higher, guarantee that production process is safe and reliable.
The lifting of roll is the pressurization of hydraulic system and removes pressure-controlled and realize.By SQ
1, SQ
2Limit switch transmission location control signal, Oil pump electrical machinery M4 provide power, and electric control system adopts Programmable Logic Controller PLC control in hydraulic system, easy construction, debugging is simple.Because PLC is that the mode of taking to scan is worked, the variation of input and the change of output are almost finished in a flash, and in stable condition performance is superior, more suitable.
After the power supply normal supply, operation such as cooling water, main transmission is normal.To the roll pressurization,, behind the signal input PLC, after ladder diagram calculates,, press SB with result's output owing to all be PLC control input
2Button.Hydraulic motor turns round by KM4, drives the hydraulic oil pump operation, the electromagnet of 3 position-5 way hydraulic buttery valve pressurization simultaneously YV
1Get electronic work, oil cylinder rises.When reaching the pressure roller SQ when subtracting a some position that rises
1Action makes YV
3Oil pressure magnetic valve (adjustable oil pressure lacks pressure electromagnetic valve) action, the temperature that this moment, pressure roller rose are pressed setting valve and are slowly evenly risen.After rising put in place, the oil cylinder oil pressure steadily increased gradually, and pressure rises to the technological requirement pressure of electro connecting pressure gauge (band magnetic resistance, shockproof good stability), and promptly pressure detects S behind the high pressure spot
1Move each magnetic valve power-off restoration, hydraulic motor stops, and oil pressure is in packing state, and existing pressure is roll constant voltage operating pressure.
After a period of time, it is that pressure reduces phenomenon that release may appear in dwell time length, will make a big impact to product quality.Consider at this point, when pressure is lower than technological requirement numerical value and is the lower limit of electro connecting pressure gauge, S
2Pressure detects low pressure point and does, and makes the oil pressure pump motor running, YV
1, YV
3Action simultaneously, the oil cylinder ftercompction begins, when reaching upper limit technological requirement numerical value, S
1Action, respective electrical magnet valve, motor reset once more and stop.Can work repeatedly according to the actual conditions needs and automatically to repair the deviation oil pressure, to satisfy the strict demand of practical condition pressure.
In reasons such as leader or shutdown, when the demand roll descends, press SB
4Remove and press button, oil pressure pump M
4Running, YV
2Action, oil cylinder makes roll drop to original position by the release of 3 position-5 way magnetic valve.When reaching SQ
2The action of pressure roller limit switch, hydraulic motor, magnetic valve are consoled and are stopped, and decline stops.This machine all adopts two places control, has all brought facility for operation and technology adjustment, and maneuverability is produced in the formula operation.
Claims (3)
1. hot-rolling mill electrical apparatus is characterized in that: comprise transmission master drive system, lubricating and cooling system, roll hydraulic system and temperature control system, roll hydraulic system employing Programmable Logic Controller PLC control.
2. according to the described hot-rolling mill electrical apparatus of claim 1, it is characterized in that: described temperature control system comprises top roll temperature controller and lower roll temperature controller.
3. according to the described hot-rolling mill electrical apparatus of claim 1, it is characterized in that: described transmission master drive system comprises the main transmission frequency converter that breaker roll speed is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010179951 CN101856672A (en) | 2010-05-17 | 2010-05-17 | Hot-rolling mill electrical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010179951 CN101856672A (en) | 2010-05-17 | 2010-05-17 | Hot-rolling mill electrical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101856672A true CN101856672A (en) | 2010-10-13 |
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ID=42942965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010179951 Pending CN101856672A (en) | 2010-05-17 | 2010-05-17 | Hot-rolling mill electrical apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101856672A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB722490A (en) * | 1952-11-17 | 1955-01-26 | American Felt Co | Improvements in or relating to a felt hardening machine |
| US5662570A (en) * | 1994-07-27 | 1997-09-02 | Voith Sulzer Papiermaschinen Gmbh | Deflection adjusted roll |
| CN101134387A (en) * | 2007-10-16 | 2008-03-05 | 上海网讯光缆材料有限公司 | Electrothermal oil roller system |
| CN101250795A (en) * | 2008-03-17 | 2008-08-27 | 江苏迎阳无纺机械有限公司 | Non-woven feather, hemp felt forming mechanism |
| CN101514527A (en) * | 2008-02-18 | 2009-08-26 | 宁波荣溢化纤科技有限公司 | Compound machine for preparing polyethylene fiber reinforced compound material |
-
2010
- 2010-05-17 CN CN 201010179951 patent/CN101856672A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB722490A (en) * | 1952-11-17 | 1955-01-26 | American Felt Co | Improvements in or relating to a felt hardening machine |
| US5662570A (en) * | 1994-07-27 | 1997-09-02 | Voith Sulzer Papiermaschinen Gmbh | Deflection adjusted roll |
| CN101134387A (en) * | 2007-10-16 | 2008-03-05 | 上海网讯光缆材料有限公司 | Electrothermal oil roller system |
| CN101514527A (en) * | 2008-02-18 | 2009-08-26 | 宁波荣溢化纤科技有限公司 | Compound machine for preparing polyethylene fiber reinforced compound material |
| CN101250795A (en) * | 2008-03-17 | 2008-08-27 | 江苏迎阳无纺机械有限公司 | Non-woven feather, hemp felt forming mechanism |
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| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20101013 |