CN109894483A - A kind of stabilized voltage device and its method of slab after-rolling cooling system high pressure section - Google Patents
A kind of stabilized voltage device and its method of slab after-rolling cooling system high pressure section Download PDFInfo
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- CN109894483A CN109894483A CN201910157954.6A CN201910157954A CN109894483A CN 109894483 A CN109894483 A CN 109894483A CN 201910157954 A CN201910157954 A CN 201910157954A CN 109894483 A CN109894483 A CN 109894483A
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- water
- pressure
- cooling system
- slab
- stabilized voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The present invention relates to control cooling after rolling for plate technical fields, disclose the stabilized voltage device and its method of a kind of slab after-rolling cooling system high pressure section, in the inlet of the middle water collecting pipe of cooling system, stabilized voltage device is set, pressure sensor is arranged in the water supplying pipe of middle water collecting pipe inlet in the stabilized voltage device, the water supplying pipe is equipped with one or more return branch, electric control valve is equipped in return branch, return branch is connected on return main to feed cistern, feed cistern is pumped equipped with variable frequency water supply, variable frequency water supply pump connects the water supplying pipe, its junction is equipped with pressure sensor；The revolving speed of variable frequency water supply pump and the opening degree of electric control valve are adjusted according to the numerical value of pressure sensor, are realized the closed-loop control of water supply, are achieved the effect that pressure of supply water pressure stabilizing, are substantially reduced the amplitude of after-rolling cooling system high pressure section pressure of supply water fluctuation.
Description
Technical field
The present invention relates to control cooling after rolling for plate technical fields, more particularly to a kind of slab after-rolling cooling system high pressure section
Stabilized voltage device and its method.
Background technique
Control cooling after rolling for plate technology is exactly steel plate under certain chemical component, controllable by carrying out to the steel plate after rolling
Water cooling technology；Under normal circumstances, the process control amount of roller repairing includes that steel plate enters coolant-temperature gage, steel plate leaving water temperature and steel
Water cooling speed of plate etc. improves the performance of steel plate to refine crystal grain and obtain target crystal tissue.
After-rolling cooling system is for controlling cold water injection system after completing steel plate rolling.And the after-rolling cooling system of slab is general
It is divided into high pressure section and low pressure stage, each section forms (collector is a pair one on the other) by several pairs of collectors again；High pressure section supplies water most
Big pressure is up to 0.5~0.6MPa, directly by water supply pump according to the pressure water supply of setting；Low pressure stage pressure of supply water is high water tank
It supplies water, pressure of supply water is 0.1~0.2MPa；Cooling water realizes the mesh of steel plate cooling by being sprayed onto surface of steel plate in the nozzle of collector
's.
Traditional handicraft changes flow when after-rolling cooling system is blocked end to end for the steel plate for needing high pressure section cooling
When, at this moment the water yield of after-rolling cooling system water outlet is changed, then very big variation will occur for pressure of supply water, generally
The easier fluctuation of the more big then pressure oscillation of the amount of blocking is big；If only by adjusting water supply revolution speed come when adjusting pressure, due to
The long pressure of supply water control lag of water supply pipe, and to be also unable to satisfy steel plate fast for the speed and precision of high service revolution speed adjustment
The requirement that fast variable-flow blocks end to end.
The prior art: patent CN200920274299 discloses a kind of water supply device of medium plate cooling after rolling system, leads to
Excessive section high water tank connects cooling manifold, and cooling manifold is allowed to obtain stable pressure of supply water；But the prior art is suitable
It supplies water for low pressure stage, is not suitable for high pressure section water supply.
Summary of the invention
The object of the present invention is to provide the stabilized voltage devices and its method of a kind of slab after-rolling cooling system high pressure section, real
The closed loop of existing pressure of supply water is adjusted, and significantly reduces the fluctuating range of after-rolling cooling system high pressure section pressure of supply water.
To solve the above-mentioned problems, the present invention provide a kind of slab after-rolling cooling system high pressure section stabilized voltage device and
Its method, described device include: the middle water collecting pipe of cooling system is connected with water supplying pipe, is equipped with pressure in the water supplying pipe and passes
Sensor and return branch are equipped with electric control valve in return branch, and return branch is connected on return main, and return main is led to
Feed cistern is equipped with variable frequency water supply in feed cistern and pumps, and variable frequency water supply pump is driven by motor, and variable frequency water supply pump connects the water supplying pipe,
And pressure sensor is set in water supplying pipe；
Further, the inlet of middle water collecting pipe is arranged in the pressure sensor, for detecting the water finally exported
Press size.
Further, the quantity of the return branch is one or more, and is equipped with electric control valve, for realizing closed loop
The fine tuning of control.
Further, the interface of variable frequency water supply pump connection water supplying pipe is arranged in the pressure sensor, for detecting most
The water pressure just exported.
Further, the caliber range of the return branch is 100mm~400mm.
Further, the caliber range of the return main is 400mm~800mm.
Further, the motor is speed regulating motor, for regulating and controlling the revolving speed of water supply pump motor.
Further, a kind of its method of the pressure-stabilizing water supply of slab after-rolling cooling system high pressure section includes following implemented step:
Step 1: setting cooling system and its water system, determines the pressure of supply water under different flow, and carry out
Storage；
Step 2: when steel plate cooling starts, water supply pump supplies water according to required flow by the pressure that setting is deposited, and passes through
The hydraulic pressure real-time monitoring of pressure sensor and pressure sensor to water supplying pipe；
Step 3: it after steel plate enters after-rolling cooling system region, is hidden end to end when after-rolling cooling system starts progress variable-flow
Gear, guarantee that the cold process light plate cooling temperature of control is uniform；Since water flow changes, middle water collecting pipe inlet pressure can also be sent out
Changing, pressure sensor is opened and is adjusted the opening degree of electric control valve according to pressure oscillation situation, catchment to centre at this time
The pressure of tube inlet carries out closed-loop control；
Step 4: pressure sensor slowly adjusts water supply revolution speed, reduces its confession according to the fluctuation situation of its pressure of supply water
Water pressure amplitude of variation.
Detailed description of the invention
Fig. 1 is the structure chart of the stabilized voltage device in the embodiment of the present invention；
Fig. 2 is the frame diagram of the pressure-stabilizing water supply method in the embodiment of the present invention；
Fig. 3 is the pressure oscillation curve in the embodiment of the present invention 1 without stable-pressure device and its when method；
Fig. 4 is pressure oscillation curve when using stable-pressure device and its method in the embodiment of the present invention 2；
Fig. 5 is the pressure stabilizing adjusting and pressure oscillation curve when variable-flow blocks in the embodiment of the present invention 3；
Fig. 6 is the pressure stabilizing adjusting and pressure oscillation curve when variable-flow blocks in the embodiment of the present invention 4；
In figure, 1- middle water collecting pipe；2- water supplying pipe；3- pressure sensor；4- return branch；5- return main；6- supplies water
Pond；7- variable frequency water supply pump；8- pressure sensor；9- motor；The upper collector pipe of 10-；Collector pipe under 11-.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "left", "right", "top", "bottom" etc. indicate
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
As shown in connection with fig. 1, a kind of slab after-rolling cooling system high pressure section of the embodiment of the present invention is schematically showed
Stabilized voltage device includes: the middle water collecting pipe 1 of cooling system is connected with water supplying pipe 2, is equipped with pressure in the water supplying pipe 2
Sensor 3 and return branch 4 are equipped with electric control valve 5 in return branch 4, and return branch 4 is connected on return main 5, return water
General pipeline 5 leads to feed cistern 6, and variable frequency water supply pump 7 is equipped in feed cistern 6, and variable frequency water supply pump 7 is driven by motor 9, and motor 9 is speed regulation
Motor, the 7 connection water supplying pipe 2 of variable frequency water supply pump, and pressure sensor 8 is set in water supplying pipe 2, pass through pressure sensor 3
With pressure sensor 8, the hydraulic pressure of the water inlet of middle water collecting pipe 1 and the feed water inlet of variable frequency water supply pump 7 is determined, then pass through electric adjustable
It saves valve 5 and adjusts opening degree, realize the control of hydraulic pressure in water supplying pipe 2.
The inlet of middle water collecting pipe 1 is arranged in the pressure sensor 3, can detecte final output to middle water collecting pipe
Water pressure；The interface of 7 connection water supplying pipe 2 of variable frequency water supply pump is arranged in the pressure sensor 8, detects initial frequency conversion and supplies
The water pressure that water pump 7 exports.
Described one or more return branch 4 of 2 installation number of water supplying pipe, and it is equipped with electric control valve 5 in return branch 4,
The closed-loop control of more pairs of pressure stabilizings of 4 quantity of return branch adjusts more accurate.
The caliber range of the return branch 4 is 100mm~400mm, and the caliber range of the return main 5 is 400mm
~800mm, can guarantee hydraulic pressure pressure stabilizing, water supply is sufficient simultaneously.
As shown in connection with fig. 2, the method for a kind of measurement rebar surface of the invention corrosion distribution characteristics, includes the following steps:
Step 1: setting cooling system and its water system, determines the pressure of supply water under different flow, and carry out
Storage；
Step 2: when steel plate cooling starts, water supply pump 2 supplies water according to required flow by the pressure that setting is deposited, and leads to
The hydraulic pressure real-time monitoring of over-voltage force snesor 3 and pressure sensor 8 to water supplying pipe；
Step 3: after steel plate enters after-rolling cooling system region, blocking end to end when after-rolling cooling system starts progress steel plate,
Guarantee that the cold process light plate cooling temperature of control is uniform；Water flow is sprayed from upper collector pipe 10 and lower collector pipe 11 to steel plate, due to going out
Water flow variation, 1 inlet pressure of middle water collecting pipe can also change, and pressure sensor 3 is beaten according to pressure oscillation situation at this time
The opening degree for opening and adjusting electric control valve 5 carries out closed-loop control to the pressure of 1 entrance of middle water collecting pipe；
Step 4: pressure sensor 8 slowly adjusts 2 revolving speed of water supply pump, reduces it according to the fluctuation situation of its pressure of supply water
Pressure of supply water amplitude of variation.
For a further understanding of the present invention, the following describes the present invention in detail with reference to examples.
Embodiment 1:
Without stable-pressure device and its method, steel plate variable-flow end to end the amount of blocking when, the upper table amount of blocking is up to 25%, the following table amount of blocking
Up to 33%, (Pressure maximum value 0.2768MPa, pressure is most up to 28.07% for high pressure section middle water collecting pipe pressure of supply water fluctuating range
Small value is 0.1991MPa).Correlation curve See Figure 3.
Embodiment 2:
Using stable-pressure device and its method, when steel plate variable-flow blocks end to end, the upper following table amount of blocking is up to 40%, high pressure section
Middle water collecting pipe pressure fluctuations amplitude is only 8.05% (Pressure maximum value 0.3017MPa, pressure minimum 0.2774MPa),
Pressure fluctuations amplitude is substantially reduced.Correlation curve is shown in Fig. 4.
Embodiment 3:
When steel plate variable-flow blocks end to end, the upper table amount of blocking is up to 38%, the following table amount of blocking up to 40%, controlling valve of voltage regulation closed loop
Maximum opening degree is 15.144 degree when control, and high pressure section middle water collecting pipe pressure fluctuations amplitude is 5.97% (Pressure maximum value
0.269669MPa, pressure minimum 0.253581MPa).Correlation curve is shown in Fig. 5.
Embodiment 4:
When steel plate variable-flow blocks end to end, the upper table amount of blocking is up to 30%, the following table amount of blocking up to 35%, controlling valve of voltage regulation closed loop
Maximum opening degree is 13.83 degree when control, and high pressure section middle water collecting pipe pressure fluctuations amplitude is 9.34% (Pressure maximum value
0.4016MPa, pressure minimum 0.3641MPa).Correlation curve and data are shown in Fig. 6.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement
Also it should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of stabilized voltage device and its method of slab after-rolling cooling system high pressure section, which is characterized in that described device packet
Include: the middle water collecting pipe (1) of cooling system is connected with water supplying pipe (2), is equipped with pressure sensor (3) in the water supplying pipe (2)
With return branch (4), electric control valve (5) are equipped in return branch (4), return branch (4) is connected on return main (5),
Return main (5) is led to feed cistern (6), and variable frequency water supply pump (7) is equipped in feed cistern (6), and variable frequency water supply pumps (7) by speed regulating motor
(9) it drives, variable frequency water supply pumps (7) and connects the water supplying pipe (2), and pressure sensor (8) is arranged in water supplying pipe (2).
2. the stabilized voltage device of slab after-rolling cooling system high pressure section as described in claim 1, which is characterized in that the pressure
Force snesor (3) is arranged in the inlet of middle water collecting pipe (1).
3. the stabilized voltage device of slab after-rolling cooling system high pressure section as described in claim 1, which is characterized in that described time
The quantity of water branch pipe (4) is one or more, and is equipped with electric control valve (5).
4. the stabilized voltage device of slab after-rolling cooling system high pressure section as described in claim 1, which is characterized in that the pressure
Interface of force snesor (8) setting in variable frequency water supply pump (7) connection water supplying pipe (2).
5. the stabilized voltage device of slab after-rolling cooling system high pressure section as described in claim 1, which is characterized in that described time
The caliber range of water branch pipe (4) is 100mm~400mm.
6. the stabilized voltage device of slab after-rolling cooling system high pressure section as described in claim 1, which is characterized in that described time
The caliber range of supply mains (5) is 400mm~800mm.
7. a kind of its method of the pressure-stabilizing water supply of slab after-rolling cooling system high pressure section, including following implemented step:
Step 1: setting cooling system and its water system, determines the pressure of supply water under different flow, and deposited
Storage；
Step 2: when steel plate cooling starts, water supply pump (2) supplies water according to required flow by the pressure that setting is deposited, and passes through
The hydraulic pressure real-time monitoring of pressure sensor (3) and pressure sensor (8) to water supplying pipe；
Step 3: after steel plate enters after-rolling cooling system region, when after-rolling cooling system, which starts progress steel plate, to be blocked end to end, out
Water flow variation, middle water collecting pipe (1) inlet pressure can also change, at this time pressure sensor (3) according to pressure wave emotionally
The opening degree of electric control valve (5) is opened and adjusted to condition, carries out closed-loop control to the pressure of middle water collecting pipe (1) entrance；
Step 4: pressure sensor (8) slowly adjusts water supply pump (2) revolving speed, reduces it according to the fluctuation situation of its pressure of supply water
Pressure of supply water amplitude of variation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910157954.6A CN109894483A (en) | 2019-03-02 | 2019-03-02 | A kind of stabilized voltage device and its method of slab after-rolling cooling system high pressure section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910157954.6A CN109894483A (en) | 2019-03-02 | 2019-03-02 | A kind of stabilized voltage device and its method of slab after-rolling cooling system high pressure section |
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| Publication Number | Publication Date |
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| CN109894483A true CN109894483A (en) | 2019-06-18 |
Family
ID=66946179
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910157954.6A Pending CN109894483A (en) | 2019-03-02 | 2019-03-02 | A kind of stabilized voltage device and its method of slab after-rolling cooling system high pressure section |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658034A (en) * | 2019-10-15 | 2021-04-16 | Posco公司 | Mixed solution supply device of rolling equipment |
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| JPH11221496A (en) * | 1997-11-21 | 1999-08-17 | Kawasaki Steel Corp | Spray apparatus |
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2019
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| CN203603214U (en) * | 2013-11-26 | 2014-05-21 | 武钢集团昆明钢铁股份有限公司 | Water supply quick response device with adjusting function |
| CN103861879A (en) * | 2014-03-28 | 2014-06-18 | 东北大学 | Online cooling device and control method for moderate-thickness plate |
| CN203778500U (en) * | 2014-04-03 | 2014-08-20 | 攀钢集团西昌钢钒有限公司 | Constant-pressure turbid circulating water system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658034A (en) * | 2019-10-15 | 2021-04-16 | Posco公司 | Mixed solution supply device of rolling equipment |
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Application publication date: 20190618 |