CN101862819B - Control mechanism capable of automatically adjusting height of liquid level and magnesium alloy plate continuously-casting system thereof - Google Patents
Control mechanism capable of automatically adjusting height of liquid level and magnesium alloy plate continuously-casting system thereof Download PDFInfo
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- CN101862819B CN101862819B CN2010102036692A CN201010203669A CN101862819B CN 101862819 B CN101862819 B CN 101862819B CN 2010102036692 A CN2010102036692 A CN 2010102036692A CN 201010203669 A CN201010203669 A CN 201010203669A CN 101862819 B CN101862819 B CN 101862819B
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- liquid level
- iron block
- control valve
- controller
- pulling force
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Abstract
The invention provides a control mechanism capable of automatically adjusting the height of a liquid level. The control mechanism comprises a controller, a servo driver, a servo motor, a driving mechanism, an adjusting valve, at least two iron blocks and a dynamometer, wherein the controller is electrically connected with the servo driver; the servo motor drives the driving mechanism to move; the movement of the driving mechanism corresponds to the change of the opening degree of the adjusting valve; the at least two iron blocks are used for detecting the height of the liquid level of a magnesium fusant; the iron blocks are connected in series with each other at fixed intervals in a vertical direction; the dynamometer is used for detecting the total tensile force of the iron blocks and transmitting a tensile force signal to the controller; and the controller adjusts the opening degree of the adjusting valve according to the tensile force signal. The control mechanism has the advantages that: due to the detection of the tensile force of the iron blocks in a magnesium fusant container and the judgment on the position relationship between the liquid level and the iron blocks, the position of the liquid level can be judged indirectly through the relationship between the iron blocks and the liquid level, the opening degree of the adjusting valve can be controlled, and the detection of the liquid level can be implemented under a high-temperature environment, in particular under a fusing state of an active metal magnesium.
Description
[technical field]
The present invention relates to roll-casting of magnesium alloy technology field, particularly a kind of controlling organization of automatic adjusting liquid level and magnesium alloy plate continuously-casting system thereof.
[background technology]
In the strip casting process of magnesium alloy, need be introduced into resistance furnace through magnesium and magnesium alloy liquid (hereinafter to be referred as the magnesium melt) after the fusing of high frequency smelting furnace, by roll output, the quality quality of casting of magnesium alloy strip plate depends on the liquid level stabilizing in the resistance furnace again, i.e. steady the and height of liquid level.In strip casting process, the instability of magnesium melt liquid level in the resistance furnace, may form flaws such as concavo-convex vestige, surperficial transverse fissure or transverse corner crack on the surface of casting base, also may form flaws such as pore in the inside of casting base, when being the liquid level instability, producing wave and cause gas to enter in the magnesium melt, if contain excessive gas in the magnesium melt, casting of magnesium alloy strip plate inside after the shaping promptly may produce pore, has a strong impact on the quality of casting of magnesium alloy strip plate.So the stability of magnesium melt liquid level is significant for control casting base matter in the research resistance furnace, the height of magnesium melt liquid level its emphasis especially especially.
One woven hose is set on the high frequency smelting furnace, and the magnesium melt that flows out through this woven hose enters in the resistance furnace, generally speaking, the aperture that a chock plug is regulated woven hose is set, thus the magnesium melt liquid level height in the controlling resistance stove.Tradition adopts the manual mode adjusting, owing to the dynamics to chock plug is difficult for holding, thereby causes the fluctuation of magnesium melt liquid level very big, stable low; The magnesium melt amount of adding in the resistance furnace is difficult for grasping, and regulates too frequently, can't ensure operator's safety.
[summary of the invention]
In order to solve existing technical problem, the invention provides a kind of controlling organization and magnesium alloy plate continuously-casting system thereof of automatic adjusting liquid level, it is safe and reliable, improves the height of magnesium melt liquid level by the aperture of accuracy controlling control valve, thereby makes qualified casting of magnesium alloy strip plate.
The present invention solves existing technical problem, and a kind of controlling organization of automatic adjusting liquid level is provided, and it comprises controller, servo-driver, servomotor, transmission mechanism and control valve; Described controller and described servo-driver electrically connect; Described servomotor band described transmission mechanism motion, and the motion of described transmission mechanism is corresponding to the variation of described control valve opening; This controlling organization also comprises at least two iron blocks and the dynamometer that is used to detect magnesium melt liquid level height, be cascaded through determining deviation at the described iron block of vertical direction, described dynamometer detects the total pulling force of described iron block, and this pulling force signal is sent to described controller, described controller is according to the aperture of the described control valve of this pulling force Signal Regulation.
The present invention further improves:
Described controller is in conjunction with the aperture characteristic of described control valve and the aperture of the described control valve of pulling force Signal Regulation.
Described at least two iron blocks comprise first iron block and second iron block, and described first iron block is corresponding to the setting height of liquid level, and described second iron block is corresponding to the high liquid level (HLL) of liquid level.
Comprise the 3rd iron block, described the 3rd iron block is corresponding to the minimum level of liquid level.
Described first to the 3rd iron block, its volume is equal, highly equal, and the gap between the adjacent iron block also equates.
The present invention solves existing technical problem, a kind of magnesium alloy plate continuously-casting system is provided, this continuously-casting system comprises electric induction furnace, resistance furnace and casting roller, heating chamber in the described electric induction furnace and the heating chamber in the described resistance furnace connect through pipeline, and the heating chamber in the described resistance furnace links to each other through carrier pipe with the district of nipping of described casting roller; Heating chamber in the described resistance furnace comprises a plurality of temperature controlled region that order is provided with; This continuously-casting system comprises the controlling organization of automatic adjusting liquid level, and this controlling organization comprises controller, servo-driver, servomotor, transmission mechanism and control valve, and this control valve string is located at described pipeline; Described controller and described servo-driver electrically connect; Described servomotor band described transmission mechanism motion, and the motion of described transmission mechanism is corresponding to the variation of described control valve opening; It is characterized in that: described controlling organization also comprises at least two iron blocks and the dynamometer that is used to detect magnesium melt liquid level height in the temperature controlled region that links to each other with described carrier pipe, be cascaded through determining deviation at the described iron block of vertical direction, described dynamometer detects the total pulling force of described iron block, and this pulling force signal is sent to described controller, described controller is according to the aperture of the described control valve of this pulling force Signal Regulation.
The present invention further improves:
Described controller is in conjunction with the aperture characteristic of described control valve and the aperture of the described control valve of pulling force Signal Regulation.
Described at least two iron blocks comprise first iron block and second iron block, and described first iron block is corresponding to the setting height of liquid level, and described second iron block is corresponding to the high liquid level (HLL) of liquid level.
Comprise the 3rd iron block, described the 3rd iron block is corresponding to the minimum level of liquid level.
Described first to the 3rd iron block, its volume is equal, highly equal, and the gap between the adjacent iron block also equates.
Compared to prior art, the invention has the beneficial effects as follows: adopt and detect the pulling force of iron block in magnesium melt container, judge the position relation between liquid level and the iron block, thereby judge the position of liquid level indirectly by the relation between iron block and the liquid level, control to adjust the aperture of valve then, realize under the hot environment, particularly the level detection under the active metal magnesium molten condition; This programme is safe and reliable, improves the height of magnesium melt liquid level by the aperture of accuracy controlling control valve, thereby improves the quality of production of casting of magnesium alloy strip plate.
[description of drawings]
The principle schematic that Fig. 1 regulates the controlling organization of liquid level automatically for the present invention;
Fig. 2 is the structural representation of magnesium alloy plate continuously-casting system of the present invention;
Fig. 3 is the plan structure schematic diagram of aquatic foods plywood continuously-casting system shown in Figure 2.
[specific embodiment]
The present invention is further described below in conjunction with description of drawings and the specific embodiment.
As shown in Figure 1, a kind of controlling organization of automatic adjusting liquid level, it comprises controller 14, servo-driver 15, servomotor 16, transmission mechanism 17 and control valve 18; Controller 14 is used for analyzing and deal with data, and the opening of automatic control and adjustment valve 18 changes; Servo-driver 15 is used to control servomotor 16; Servomotor 16 can very high control rate and the position of output accuracy, and voltage signal is converted into torque and rotating speed with drive transmission device 17; Transmission mechanism 17 changes the aperture of control valve 18 through the driving of servomotor 16, thereby changes the flow of this control valve of flowing through.Controller 14 of the present invention electrically connects with servo-driver 15; Servomotor 16 is being with transmission mechanism 17 motions, and the motion of transmission mechanism 17 is corresponding to the variation of control valve opening; Simultaneously, this controlling organization also comprises at least two iron blocks 12 and the dynamometer 13 that is used to detect magnesium melt liquid level height 11, be cascaded through determining deviation at vertical direction iron block 12, dynamometer 13 detects the total pulling force of iron block 12, and this pulling force signal is sent to controller 14, controller 14 is according to the aperture of this pulling force Signal Regulation control valve 18.For dynamic fluid system, the liquid level in its interior container particularly, input liquid, the outside output liquid in limit in the Bian Xiangqi, regulate its input quantity according to the liquid level signal that obtains indirectly this moment, keeps the stable purpose of liquid level in the container thereby reach.Controlling organization of the present invention is applicable to the magnesium alloy smelting environment of high temperature complexity, is specially adapted to the above level detection requirement of 600 degree.
Controller 14 is in conjunction with the aperture characteristic 19 of control valve and the aperture of pulling force Signal Regulation control valve.In dynamic fluid system, be directed to the input channel of the container of stablizing liquid level, the control valve that is provided with on it, require through the fluid flow of this valve constant, but, the quantity of fluid supply and pressure changes because existing, so the aperture of control valve is according to the corresponding change of the variation in this liquid source, the rule of this change is the aperture characteristic of control valve.Store the aperture characteristic of control valve in the controller of the present invention, i.e. the theoretical aperture size of control valve is then in conjunction with the difference of the concrete liquid level that detects with the liquid level of setting height, the actual aperture of correction control valve.The control valve of ECDC aperture characteristic and pulling force signal controlling, it can guarantee the stability of liquid level.
The present invention adopts at least two iron blocks 12 to comprise first iron block 121 and second iron block 122, first iron block 121 is corresponding to the setting height of liquid level, second iron block 122 also comprises the minimum level of the 3rd iron block 123, the three iron blocks 123 corresponding to liquid level corresponding to the high liquid level (HLL) of liquid level.First to the 3rd iron block, its volume is equal, highly equal, and the gap between the adjacent iron block also equates.
Because: F
Draw+ F
Floating=G;
F
Floating=ρ
LiquidGV
Row
When flooding the 3rd iron block (minimum level): V
1=V;
When flooding first iron block (setting liquid level): V
2=2V;
When flooding second iron block (high liquid level (HLL)): V
3=3V;
So:
F
Draw=G-ρ
LiquidGV
Row
Because be that the gap is provided with between each iron block, so when liquid level at the uniform velocity rose, the pulling force signal that this dynamometer is measured was a staircase curve, and this ladder is the bent gesture that descends.The corresponding value of thrust of each iron block of pulling force signal and this of subsequent detection is compared, and is to be in to set between high liquid level (HLL) and the minimum level thereby judge it, or is lower than minimum level or is higher than high liquid level (HLL).
The present invention adopts and detects the pulling force of iron block in magnesium melt container, judge the position relation between liquid level and the iron block, thereby judge the position of liquid level indirectly by the relation between iron block and the liquid level, control to adjust the aperture of valve then, realize under the hot environment, particularly the level detection under the active metal magnesium molten condition; This programme is safe and reliable, improves the height of magnesium melt liquid level by the aperture of accuracy controlling control valve, thereby improves the quality of production of casting of magnesium alloy strip plate.
As shown in Figure 1 to Figure 3, a kind of magnesium alloy plate continuously-casting system, this continuously-casting system comprises electric induction furnace 21, resistance furnace 22 and casting roller 23, heating chamber in heating chamber in the electric induction furnace 21 and the resistance furnace 22 connects through pipeline 24, and the heating chamber in the resistance furnace 22 links to each other through carrier pipe 25 with the district of nipping of casting roller 23; Heating chamber in the resistance furnace 22 comprises a plurality of temperature controlled region that order is provided with; This continuously-casting system comprises the controlling organization of automatic adjusting liquid level, and this controlling organization comprises
Controller 14, servo-driver 15, servomotor 16, transmission mechanism 17 and control valve 18; Controller 14 is used for analyzing and deal with data, and the opening of automatic control and adjustment valve 18 changes; Servo-driver 15 is used to control servomotor 16; Servomotor 16 can very high control rate and the position of output accuracy, and voltage signal is converted into torque and rotating speed with drive transmission device 17; Transmission mechanism 17 changes the aperture of control valve 18 through the driving of servomotor 16, thereby changes the flow of this control valve of flowing through.Controller 14 of the present invention electrically connects with servo-driver 15; Servomotor 16 is being with transmission mechanism 17 motions, and the motion of transmission mechanism 17 is corresponding to the variation of control valve opening; Simultaneously, this controlling organization also comprise be used to detect with temperature controlled region that carrier pipe links to each other at least two iron blocks and the dynamometer of magnesium melt liquid level height, be cascaded through determining deviation at vertical direction iron block 12, dynamometer 13 detects the total pulling force of iron block 12, and this pulling force signal is sent to controller 14, controller 14 is according to the aperture of this pulling force Signal Regulation control valve 18.For this magnesium alloy plate continuously-casting system, the liquid level of particularly adjacent temperature controlled region with carrier pipe, pipeline is imported the magnesium melt in temperature controlled region on one side, carrier pipe is outwards exported the magnesium melt from temperature controlled region on one side, regulate the input quantity of its pipeline magnesium melt according to the liquid level signal that obtains indirectly this moment, keeps the stable purpose of liquid level in the temperature controlled region thereby reach.Controlling organization of the present invention is applicable to the magnesium alloy smelting environment of high temperature complexity, is specially adapted to the above level detection requirement of 600 degree.
Controller 14 is in conjunction with the aperture characteristic 19 of control valve and the aperture of pulling force Signal Regulation control valve.In this magnesium alloy plate continuously-casting system, be directed to the pipeline of stablizing liquid level, the control valve that is provided with on it, require through the fluid flow of this valve constant, but, magnesium melt quantity in the electric induction furnace and pressure changes because existing, so the aperture of control valve is according to the corresponding change of the variation of this magnesium melt, the rule of this change is the aperture characteristic of control valve.Store the aperture characteristic of control valve in the controller of the present invention, i.e. the theoretical aperture size of control valve is then in conjunction with the difference of the concrete liquid level that detects with the liquid level of setting height, the actual aperture of correction control valve.The control valve of ECDC aperture characteristic and pulling force signal controlling, it can guarantee the stability of liquid level.
The present invention adopts at least two iron blocks 12 to comprise first iron block 121 and second iron block 122, first iron block 121 is corresponding to the setting height of liquid level, second iron block 122 also comprises the minimum level of the 3rd iron block 123, the three iron blocks 123 corresponding to liquid level corresponding to the high liquid level (HLL) of liquid level.First to the 3rd iron block, its volume is equal, highly equal, and the gap between the adjacent iron block also equates.
Because: F
Draw+ F
Floating=G;
F
Floating=ρ
LiquidGV
Row
When flooding the 3rd iron block (minimum level): V
1=V;
When flooding first iron block (setting liquid level): V
2=2V;
When flooding second iron block (high liquid level (HLL)): V
3=3V;
So:
F
Draw=G-ρ
LiquidGV
Row
Because be that the gap is provided with between each iron block, so when liquid level at the uniform velocity rose, the pulling force signal that this dynamometer is measured was a staircase curve, and this ladder is the bent gesture that descends.The corresponding value of thrust of each iron block of pulling force signal and this of subsequent detection is compared, and is to be in to set between high liquid level (HLL) and the minimum level thereby judge it, or is lower than minimum level or is higher than high liquid level (HLL).
The present invention adopts and detects the pulling force of iron block in magnesium melt container, judge the position relation between liquid level and the iron block, thereby judge the position of liquid level indirectly by the relation between iron block and the liquid level, control to adjust the aperture of valve then, realize under the hot environment, particularly the level detection under the active metal magnesium molten condition; This programme is safe and reliable, improves the height of magnesium melt liquid level by the aperture of accuracy controlling control valve, thereby improves the quality of production of casting of magnesium alloy strip plate.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. controlling organization of automatically regulating liquid level, it comprises controller, servo-driver, servomotor, transmission mechanism and control valve; Described controller and described servo-driver electrically connect; Described servomotor band described transmission mechanism motion, and the motion of described transmission mechanism is corresponding to the variation of described control valve opening; It is characterized in that: this controlling organization also comprises at least two iron blocks and the dynamometer that is used to detect magnesium melt liquid level height, be cascaded through determining deviation at the described iron block of vertical direction, described dynamometer detects the total pulling force of described iron block, and this pulling force signal is sent to described controller, described controller is according to the aperture of the described control valve of this pulling force Signal Regulation; Described controller is in conjunction with the aperture characteristic of described control valve and the aperture of the described control valve of pulling force Signal Regulation; Described at least two iron blocks comprise first iron block and second iron block, and described first iron block is corresponding to the setting height of liquid level, and described second iron block is corresponding to the high liquid level (HLL) of liquid level.
2. the controlling organization of automatic adjusting liquid level according to claim 1 is characterized in that: comprise the 3rd iron block, described the 3rd iron block is corresponding to the minimum level of liquid level.
3. the controlling organization of automatic adjusting liquid level according to claim 2 is characterized in that: described first to the 3rd iron block, and its volume is equal, highly equal, and the gap between the adjacent iron block also equates.
4. magnesium alloy plate continuously-casting system, this continuously-casting system comprises electric induction furnace, resistance furnace and casting roller, heating chamber in the described electric induction furnace and the heating chamber in the described resistance furnace connect through pipeline, and the heating chamber in the described resistance furnace links to each other through carrier pipe with the district of nipping of described casting roller; Heating chamber in the described resistance furnace comprises a plurality of temperature controlled region that order is provided with; This continuously-casting system comprises the controlling organization of automatic adjusting liquid level, and this controlling organization comprises controller, servo-driver, servomotor, transmission mechanism and control valve, and this control valve string is located at described pipeline; Described controller and described servo-driver electrically connect; Described servomotor band described transmission mechanism motion, and the motion of described transmission mechanism is corresponding to the variation of described control valve opening; It is characterized in that: described controlling organization also comprises at least two iron blocks and the dynamometer that is used to detect magnesium melt liquid level height in the temperature controlled region that links to each other with described carrier pipe, be cascaded through determining deviation at the described iron block of vertical direction, described dynamometer detects the total pulling force of described iron block, and this pulling force signal is sent to described controller, described controller is according to the aperture of the described control valve of this pulling force Signal Regulation; Described controller is in conjunction with the aperture characteristic of described control valve and the aperture of the described control valve of pulling force Signal Regulation; Described at least two iron blocks comprise first iron block and second iron block, and described first iron block is corresponding to the setting height of liquid level, and described second iron block is corresponding to the high liquid level (HLL) of liquid level.
5. magnesium alloy plate continuously-casting system according to claim 4 is characterized in that: comprise the 3rd iron block, described the 3rd iron block is corresponding to the minimum level of liquid level.
6. magnesium alloy plate continuously-casting system according to claim 5 is characterized in that: described first to the 3rd iron block, and its volume is equal, highly equal, and the gap between the adjacent iron block also equates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102036692A CN101862819B (en) | 2010-06-18 | 2010-06-18 | Control mechanism capable of automatically adjusting height of liquid level and magnesium alloy plate continuously-casting system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102036692A CN101862819B (en) | 2010-06-18 | 2010-06-18 | Control mechanism capable of automatically adjusting height of liquid level and magnesium alloy plate continuously-casting system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101862819A CN101862819A (en) | 2010-10-20 |
| CN101862819B true CN101862819B (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102036692A Expired - Fee Related CN101862819B (en) | 2010-06-18 | 2010-06-18 | Control mechanism capable of automatically adjusting height of liquid level and magnesium alloy plate continuously-casting system thereof |
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| CN111495971A (en) * | 2020-05-06 | 2020-08-07 | 义乌聚龙自动化科技有限公司 | Continuous casting and rolling equipment and method for aluminum alloy plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5170839A (en) * | 1990-04-11 | 1992-12-15 | Mannesmann Aktiengesellschaft | Method for determining and regulating the level of a bath of molten metal |
| US6505676B1 (en) * | 1998-08-05 | 2003-01-14 | Siemens Aktiengesellschaft | Method and device for casting a strand of liquid metal |
| CN101041177A (en) * | 2007-03-21 | 2007-09-26 | 鞍钢股份有限公司 | Automatic stabilized precision control device of the tundish in the center of the concasting |
| CN101332494A (en) * | 2007-06-29 | 2008-12-31 | 富士胶片株式会社 | Method and apparatus for manufactuirng aluminum alloy strip for lithographic printing plates |
| CN101337271A (en) * | 2007-07-08 | 2009-01-07 | 欧阳明 | Casting technique capable of melting, transferring and precisely quantitatively feeding metal and device thereof |
-
2010
- 2010-06-18 CN CN2010102036692A patent/CN101862819B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5170839A (en) * | 1990-04-11 | 1992-12-15 | Mannesmann Aktiengesellschaft | Method for determining and regulating the level of a bath of molten metal |
| US6505676B1 (en) * | 1998-08-05 | 2003-01-14 | Siemens Aktiengesellschaft | Method and device for casting a strand of liquid metal |
| CN101041177A (en) * | 2007-03-21 | 2007-09-26 | 鞍钢股份有限公司 | Automatic stabilized precision control device of the tundish in the center of the concasting |
| CN101332494A (en) * | 2007-06-29 | 2008-12-31 | 富士胶片株式会社 | Method and apparatus for manufactuirng aluminum alloy strip for lithographic printing plates |
| CN101337271A (en) * | 2007-07-08 | 2009-01-07 | 欧阳明 | Casting technique capable of melting, transferring and precisely quantitatively feeding metal and device thereof |
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| CN101862819A (en) | 2010-10-20 |
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