CN202921878U - Crystallizer vibrational frequency control system - Google Patents
Crystallizer vibrational frequency control system Download PDFInfo
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- CN202921878U CN202921878U CN 201220374849 CN201220374849U CN202921878U CN 202921878 U CN202921878 U CN 202921878U CN 201220374849 CN201220374849 CN 201220374849 CN 201220374849 U CN201220374849 U CN 201220374849U CN 202921878 U CN202921878 U CN 202921878U
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- direct current
- armature
- current generator
- voltage
- fairing
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Abstract
The utility model discloses a crystallizer vibrational frequency control system. A crystallizer vibrational frequency detecting device comprises a direct current motor, a rectifying device and a programmable logic controller, wherein the direct current motor is used for driving a crystallizer, the rectifying device is used for transforming alternating current voltage into direct current voltage used for driving the direct current motor and outputting the standard signals relative to the electromotance of an armature of the direct current motor, and the programmable logic controller is used for receiving the standard signals relative to the electromotance of the armature of the direct current motor from the rectifying device and calculating the vibrational frequency of the crystallizer according to the received standard signals.
Description
Technical field
The utility model relates to the metal continuous cast technology, relates in particular to the control technology of mold oscillation frequency in continuous casting technology.
Background technology
Mould vibration device has very important status as the core component of conticaster in continuous casting manufacturing technique, can prevent initial solidification shell and crystallizer bonding, plays the forced stripper mechanism effect, is the successful prerequisite of casting; Simultaneously can also improve cc billet surface quality.Vibration frequency will be blocked the operation of mould vibration device and withdrawal straightening machine extremely immediately, interrupt continuous casting production, and no person will cause the bleed-out accident.Therefore, vibration frequency is the important indicator parameter of mold oscillation running status, for normal production of casting machine, very important meaning is arranged.
Fig. 1 illustrates the mould vibration device schematic diagram according to prior art.As shown in Figure 1, continuous casting crystallizer for plate billet vibrating device 10 adopts the four eccentric wheel mechanical oscillation that direct current generator 23 drives.Direct current generator 23 drives respectively two outer arc eccentric wheel 28a and two inner arc eccentric wheel 28b by the first reductor 27a and the second reductor 27b.The crystallizer (not shown) is arranged on described four eccentric wheels, and therefore when direct current generator 23 drives eccentric wheel, crystallizer will vibrate.As known to those skilled in the art, the vibration frequency of described mold oscillation is relevant to the rotating speed of direct current generator.Tachometer 24 is connected and synchronous operation with direct current generator 23 with sprocket wheel by chain, thereby measures the rotating speed of direct current generator.
Fig. 2 is the schematic diagram according to the mold oscillation frequency detecting device of prior art.With reference to shown in Figure 2, power supply 21, rectifier 22, direct current generator 23, tachometer 24 connect successively.Tachometer 24 detects the rotating speed of direct current generator 23 and (voltage range is 0～140V) according to the rotating speed output voltage signal that detects.It is 4～20mA standard signal that the voltage signal of described tachometer 24 outputs converts scope to through signal transducer 25.Programmable logic controller (PLC) (PLC) 26 receives from the standard signal of signal transducer 25 outputs by its analogue input template (AI:Analog Implate), and by the standard signal that receives being changed and calculate to obtain the vibration frequency of crystallizer.
Although the degree of protection of tachometer 24 is up to IP55, because tachometer 24 is in high temperature, wet environment for a long time, tachometer 24 ground connection of frequently making moist.Simultaneously, the connection chain of tachometer 24, sprocket wheel abrasion deformation, chain frequently ruptures, comes off; this all will cause tachometer 24 asynchronous with direct current generator 23, and the vibration frequency of output is abnormal, and mould vibration device and withdrawal straightening machine are blocked shutdown; casting is interrupted, and causes very large loss to production.Because site environment is abominable, change online tachometer, chain is abnormally dangerous and consuming time, be tachometer 24 failure-frequencies and processing method during section sometime shown in following table 1, frequent owing to breaking down, the adverse effect that causes to production.
Table 1 tachometer failure-frequency and processing method
| Fault time | The stream Taoist monastic name | Failure cause | Consequence | Treatment measures |
| 2004-2-5 | Ⅱ | Tachometer ground connection | Disconnected watering | Change tachometer |
| 2004-5-18 | Ⅱ | The tachometer chain takes off | Singly water | Change chain |
| 2004-5-19 | Ⅱ | The frequency deviation of shaking is high | Disconnected watering | Change tachometer |
| 2004-5-20 | Ⅱ | The tachometer chain takes off | Singly water | Change chain |
| 2004-7-18 | Ⅰ | The tachometer chain takes off | Disconnected watering | Change chain |
| 2004-7-23 | Ⅰ | The frequency deviation of shaking is low | Singly water | Change tachometer |
| 2004-8-5 | Ⅰ | The frequency deviation of shaking is high | Singly water | Change tachometer |
| 2004-8-7 | Ⅰ | The tachometer chain takes off | Singly water | Change chain |
| 2004-8-10 | Ⅰ | The tachometer chain takes off | Singly water | Change chain |
| 2004-8-24 | Ⅱ | The tachometer chain takes off | Disconnected watering | Change chain |
| 2004-8-26 | Ⅱ | The tachometer chain takes off | Singly water | Change chain |
| 2004-9-12 | Ⅰ | The frequency deviation of shaking is low | Singly water | Change tachometer |
| 2004-10-4 | Ⅰ | The frequency deviation of shaking is high | Singly water | Change tachometer |
| 2004-11-4 | Ⅰ | Tachometer ground connection | Singly water | Change tachometer |
| 2004-11-10 | Ⅰ | Tachometer ground connection | Singly water | Change tachometer |
| 2004-11-18 | Ⅰ | The tachometer chain takes off | Disconnected watering | Change chain |
| 2004-12-28 | Ⅱ | Tachometer ground connection | Singly water | Change tachometer |
Summary of the invention
The problems referred to above in view of prior art, the purpose of this utility model is to provide the mold oscillation frequency detecting device that need not to arrange tachometer and relevant apparatus thereof and can detect the vibration frequency of mold oscillation, thereby overcomes the adverse effect of bringing due to tachometer in prior art.
According to a kind of mold oscillation frequency detecting device of the present utility model, comprising: the direct current generator that is used for driving crystallizer; Alternating voltage is converted to be used to the DC voltage that drives described direct current generator and the output fairing about the standard signal of the armature electromotive force of described direct current generator; Receive about the standard signal of the armature electromotive force of described direct current generator and calculate the programmable logic controller (PLC) of the vibration frequency of mold oscillation according to the standard signal that receives from described fairing.
In addition, described fairing comprises: the rectifier that described alternating voltage is converted to DC voltage; Described DC voltage is carried out the divider that dividing potential drop is exported the armature DC voltage of described direct current generator; Detect the first detector of described armature DC voltage; Detect the second detector of the armature supply of described direct current generator; Detect the 3rd detector of armature circuit resistance; Detect the 4th detector of armature circuit self-induction; Determine the controller of the armature electromotive force of described direct current generator according to the armature DC voltage of described direct current generator and armature supply and armature circuit resistance and self-induction; Follower about the standard signal of the armature electromotive force of described direct current generator is provided.
In addition, described follower offers described programmable logic controller (PLC) with scope at the standard signal of 4～20mA.
In addition, fairing has the 3rd pin and the 4th pin, described programmable logic controller (PLC) receives described standard signal by having the first pin of being connected respectively to described the 3rd pin and described the 4th pin and the analogue input template of the second pin from described fairing.
In addition, the second detector is current transformer.
In mold oscillation frequency detecting device of the present utility model as above, the rotating speed of direct current generator is no longer detected and is exported by tachometer, but is directly exported by fairing, therefore is not subjected to external environment influence, and fault rate is very low; Fairing converts the armature electromotive force of direct current generator standard signal to and outputs to PLC in the armature DC voltage of output DC machine, has thoroughly stopped the abnormal conditions frequently of shaking that tachometer and relevant apparatus thereof cause; Can greatly improve reliability, security, the economy of casting machine according to mold oscillation frequency detecting device of the present utility model.
Description of drawings
By the description that following accompanying drawing as a result carries out embodiment, these and/or other aspect of the present invention and advantage will become clear and be easier to and understand, wherein:
Fig. 1 is the schematic diagram that illustrates according to the mould vibration device of prior art;
Fig. 2 is the schematic diagram that illustrates according to the mold oscillation frequency detecting device of prior art;
Fig. 3 is the schematic diagram that illustrates according to the mold oscillation frequency control system of the utility model embodiment;
Fig. 4 is the block diagram that illustrates according to the fairing of this use new embodiment;
Fig. 5 is fairing and the PLC connection diagram that illustrates according to the utility model embodiment;
Fig. 6 is the schematic diagram that illustrates according to the PLC handling procedure of the utility model embodiment
The specific embodiment
Now the utility model embodiment is described in detail, its example shown in the accompanying drawings, wherein, identical label represents identical parts all the time.Below with reference to the accompanying drawings embodiment is described to explain the present invention.
Fig. 3 is the schematic diagram that illustrates according to the mold oscillation frequency control system 30 of the utility model embodiment.
As shown in Figure 3, comprise according to mold oscillation frequency control system 30 of the present utility model power supply 31, fairing 32, direct current generator 33 and the programmable logic controller (PLC) (PLC) 36 that connects successively.
Similar to prior art, direct current generator 33 is connected with mould vibration device, is used for driving the mould vibration device operation.
Described power supply 31 is used for providing power supply, specifically, is used for providing alternating voltage.
Fairing 32 can be converted to the alternating voltage that receives from described power supply 31 adjustable dc voltage and described DC voltage is offered direct current generator 33 as the adding armature DC voltage (being called for short " armature DC voltage ") of direct current generator.
In addition, fairing 32 can calculate the armature electromotive force of direct current generator 33 and output about the standard signal of the armature electromotive force of described direct current generator.Specifically, described fairing 32 can come output area at the standard signal of 4～20mA by the armature electromotive force that detects, calculates direct current generator.
This fairing 32 can be realized by the 6RA70 series arrangements for speed regulation of SIMENS company, but be not limited to this.Concrete structure for above-mentioned fairing 32 describes in detail with reference to Fig. 4.
PLC36 is from fairing 32 reception standard signals and by the standard signal that receives being changed and calculate to obtain the vibration frequency of mould vibration device.Specifically, be provided with analogue input template (AI) in PLC36, AI is electrically connected to fairing by this analogue input template, receives and process the scope of fairing 32 outputs at the standard signal of 4～20mA.
Below, describe more detailed structure according to the fairing of this use new embodiment in detail in conjunction with Fig. 4.
As understood by those skilled in the art, the direct current generator voltage balance equation is: U
a=E
s+ I
a* R
a+ L
a* dI
a/ dt, wherein, U
a-add armature DC voltage, E
s-armature electromotive force, I
a-armature supply, R
a-armature circuit resistance, L
a-armature circuit self-induction.That is, add armature DC voltage U
aBe used to overcoming armature electromotive force E
s, the armature circuit resistance R
aThe pressure drop that causes, armature circuit self-induction L
aThe electromotive force that causes.
The armature electromotive force equation formula of direct current generator is: E
s=K
EФ n, wherein, K
EBe the electromotive force coefficient, Ф is the main pole magnetic flux, and n is actual speed.Can be found out armature electromotive force E by above-mentioned formula
sBe directly proportional with actual speed n.
Can be found out by aforesaid equation, can be according to adding armature DC voltage U
a, armature supply I
a, the armature circuit resistance R
aWith self-induction L
aCalculate the armature electromotive force E of direct current generator
s, and can indirectly obtain the actual speed n of direct current generator, thus the function that tachometer is measured actual speed can be replaced.
For this reason, as shown in Figure 4, can comprise according to fairing 32 of the present utility model: rectifier 321 is converted to DC voltage with alternating voltage; Divider 322 carries out to described DC voltage the armature DC voltage that dividing potential drop is exported described direct current generator; The first detector 323 detects described armature DC voltage; The second detector 324, the armature supply of the described direct current generator of detection; The 3rd detector 325 detects armature circuit resistance; The 4th detector 326 detects the armature circuit self-induction; Controller 327 is determined the armature electromotive force of described direct current generator; Follower 328 provides the standard signal about the armature electromotive force of described direct current generator.
Here, can realize described the first detector to the four detectors by mode commonly used in this area.Preferably, the second detector is current transformer.
Fig. 5 is the connection diagram according to fairing 32 and the PLC 36 of the utility model embodiment, i.e. the enlarged drawing at P place in Fig. 3.As shown in Figure 4, described analogue input template AI and fairing 32 are respectively equipped with the first pin 2 and the second pin 3, and fairing 32 is provided with the 3rd pin 14 and the 4th pin 15.The first pin 2 and the 3rd pin 14, the second pins 3 and the 4th pin 15 interconnect.Fairing 32 is input to the standard letter in the analogue input template AI of PLC 36 by the 3rd pin 14 and the 4th pin 15.
In conjunction with shown in Figure 6, Fig. 6 is the schematic diagram according to the PLC handling procedure of the utility model embodiment.PLC 36 can be by changing and calculate the vibration frequency of mould vibration device to the scope that receives at 4～20mA standard signal.Detailed process is: the analogue input template AI of PLC 36 will receive the standard signal PIW524 that comes and be transferred to FC105.Here, FC105 is the analog quantity digital quantity A/D translation function piece of a standard, and it obtains vibration frequency output valve DB10.DBD4 according to standard signal PIW524 by conversion with after calculating.Wherein, data 250 and 0 are the highest and minimum limit values of mold oscillation frequency.
According to the utility model, the rotating speed of direct current generator is no longer detected by tachometer, but is directly exported by fairing, therefore is not subjected to external environment influence, and fault rate is very low.Fairing calculates the armature electromotive force of direct current generator and converts thereof into standard signal to output to programmable logic controller (PLC) in output armature DC voltage, has thoroughly stopped thus the vibration frequency abnormal conditions that tachometer and relevant apparatus cause.Replace fault rate high tachometer and device thereof according to mold oscillation frequency detecting device of the present utility model, improve reliability, security, the economy of casting machine.Equally, the utility model can also extend to other such as the general calculating of the Direct Current Governor System that adopts tachometer or encoder and relevant speed aspect.
Although represented and described some embodiments of the present invention, having it should be appreciated by those skilled in the art that and to modify to these embodiment in the situation that do not break away from principle of the present invention and the spirit that is limited its scope by claim and equivalent thereof.
Claims (5)
1. mold oscillation frequency control system comprises it is characterized in that comprising:
Be used for driving the direct current generator of crystallizer;
Alternating voltage is converted to be used to the DC voltage that drives described direct current generator and the output fairing about the standard signal of the armature electromotive force of described direct current generator;
Receive about the standard signal of the armature electromotive force of described direct current generator and calculate the programmable logic controller (PLC) of the vibration frequency of mold oscillation according to the standard signal that receives from described fairing.
2. mold oscillation frequency control system according to claim 1, is characterized in that, described fairing comprises:
Described alternating voltage is converted to the rectifier of DC voltage;
Described DC voltage is carried out the divider that dividing potential drop is exported the armature DC voltage of described direct current generator;
Detect the first detector of described armature DC voltage;
Detect the second detector of the armature supply of described direct current generator;
Detect the 3rd detector of armature circuit resistance;
Detect the 4th detector of armature circuit self-induction;
Determine the controller of the armature electromotive force of described direct current generator according to the armature DC voltage of described direct current generator and armature supply and armature circuit resistance and self-induction;
Follower about the standard signal of the armature electromotive force of described direct current generator is provided.
3. mold oscillation frequency control system according to claim 2, is characterized in that, described follower offers described programmable logic controller (PLC) with scope at the standard signal of 4～20mA.
4. mold oscillation frequency control system according to claim 1, is characterized in that, fairing has the 3rd pin and the 4th pin,
Described programmable logic controller (PLC) receives described standard signal by having the first pin of being connected respectively to described the 3rd pin and described the 4th pin and the analogue input template of the second pin from described fairing.
5. mold oscillation frequency control system as claimed in claim 2, is characterized in that, the second detector is current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220374849 CN202921878U (en) | 2012-07-31 | 2012-07-31 | Crystallizer vibrational frequency control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220374849 CN202921878U (en) | 2012-07-31 | 2012-07-31 | Crystallizer vibrational frequency control system |
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| Publication Number | Publication Date |
|---|---|
| CN202921878U true CN202921878U (en) | 2013-05-08 |
Family
ID=48211872
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220374849 Expired - Lifetime CN202921878U (en) | 2012-07-31 | 2012-07-31 | Crystallizer vibrational frequency control system |
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| Country | Link |
|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450468A (en) * | 2017-09-29 | 2017-12-08 | 四川德胜集团钒钛有限公司 | A kind of continuous casting frequency-changing control system and its control method |
-
2012
- 2012-07-31 CN CN 201220374849 patent/CN202921878U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450468A (en) * | 2017-09-29 | 2017-12-08 | 四川德胜集团钒钛有限公司 | A kind of continuous casting frequency-changing control system and its control method |
| CN107450468B (en) * | 2017-09-29 | 2019-12-20 | 四川德胜集团钒钛有限公司 | Continuous casting frequency conversion control system and control method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130508 |