CN110618649A - Online dehumidification air injection system and method for finishing and preventing corrosion of oriented silicon steel - Google Patents
Online dehumidification air injection system and method for finishing and preventing corrosion of oriented silicon steel Download PDFInfo
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- CN110618649A CN110618649A CN201810628115.3A CN201810628115A CN110618649A CN 110618649 A CN110618649 A CN 110618649A CN 201810628115 A CN201810628115 A CN 201810628115A CN 110618649 A CN110618649 A CN 110618649A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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Abstract
The invention discloses an online dehumidifying and air-injecting system and method for finishing and preventing corrosion of oriented silicon steel, which are arranged at the outlet of a finishing unit and comprise a unit bracket, an upper spray nozzle bracket and a lower spray nozzle bracket which are arranged on the unit bracket; the upper spray nozzle bracket is connected with an upper spray nozzle which is used for blowing out dehumidifying gas aiming at the upper surface of the strip steel; the lower nozzle support is connected with a lower nozzle which is used for aiming at the lower surface of the strip steel to blow out dehumidifying gas; the upper spray head bracket is also connected with an upper spray head control valve used for controlling the opening and closing of the upper spray head; the lower spray head bracket is also connected with a lower spray head control valve used for controlling the opening and closing of the lower spray head; further comprising: and the PLC control system is used for controlling the start and stop of the whole online dehumidification jet system. The method can eliminate surface moisture generated by the oriented silicon steel during the production of the finishing machine set, thereby increasing the antirust capacity of the finished steel coil of the oriented silicon steel.
Description
Technical Field
The invention relates to an oriented silicon steel finishing machine set, in particular to an online dehumidifying and air-injecting system and method for finishing and preventing corrosion of oriented silicon steel.
Background
In the production process of the oriented silicon steel, only general gas-phase antirust paper is usually used, the gas-phase antirust paper can only ensure the antirust effect under the condition of reducing the environmental humidity and the dew point, once the production environment or the strip steel has the dewing condition, the steel coil is corroded, and the use of a user is seriously influenced.
As shown in figure 1, the prior rust-proof measure of the finished oriented silicon steel coil mainly depends on the totally-closed sticking of inner and outer lining rust-proof paper, the sleeving of a plastic sleeve and a buffer material, the wrapping of inner and outer paper corner protectors at two ends, the wrapping of an outer iron plate and an inner lining iron plate, and the installation of round-protection corrugated paper, a round-protection iron plate, the inner and outer iron corner protectors and the bundling at two sides of the steel coil.
Above-mentioned current packing rust-resistant measure only can satisfy the coil of strip corrosion that causes because of the external reason behind the packing, however, to packing inside coil of strip rust-resistant relatively poor, if the coil of strip surface in the production is because of the dewfall that the production environment caused, the moisture will remain in airtight packaging material and coil of strip after the packing to take place the galvanic cell reaction and take place the corrosion, comparatively obvious corrosion can take place promptly in the shortest 3 months, and this kind of corrosion can only be found after the package is opened in user department moreover.
Therefore, the occurrence of corrosion on the finished steel coil not only causes short storage time of the finished oriented silicon steel product, but also leads users to complain and disagreement about the corrosion quality of the finished oriented silicon steel product, which always troubles the production of the finishing machine set of the oriented silicon steel for a long time.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the online dehumidifying and air-injecting system and the online dehumidifying and air-injecting method for finishing the oriented silicon steel and preventing corrosion, which can eliminate surface moisture generated by the oriented silicon steel during the production of a finishing machine set, thereby increasing the rust prevention capability of the finished steel coil of the oriented silicon steel.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, an online dehumidifying and air-injecting system for finishing and preventing corrosion of oriented silicon steel is arranged at an outlet position of a finishing unit and comprises: the unit bracket is arranged on the upper spray nozzle bracket and the lower spray nozzle bracket on the unit bracket;
the upper spray nozzle bracket is connected with an upper spray nozzle which is used for blowing out dehumidifying gas aiming at the upper surface of the strip steel;
the lower nozzle support is connected with a lower nozzle which is used for aiming at the lower surface of the strip steel to blow out dehumidifying gas;
the upper spray head bracket is also connected with an upper spray head control valve used for controlling the opening and closing of the upper spray head;
the lower spray head bracket is also connected with a lower spray head control valve used for controlling the opening and closing of the lower spray head;
further comprising: and the PLC control system is used for controlling the start and stop of the whole online dehumidification jet system.
The upper spray head and the lower spray head are respectively positioned at two sides of the strip steel.
The dehumidifying gas is compressed air or nitrogen.
The upper nozzle and the upper nozzle control valve, and the lower nozzle control valve are communicated through connecting hoses.
On the other hand, the online dehumidifying and air-jetting method for finishing the oriented silicon steel and preventing corrosion comprises the following steps:
1) arranging a plurality of dew point meters on the production field of a finishing unit, and respectively arranging an upper spray head and a lower spray head on two sides of the strip steel;
2) when any dew point instrument gives an alarm that the dew point exceeds the standard, the online dehumidification system is automatically started through the PLC control system, so that the upper spray head and the lower spray head respectively aim at the upper surface and the lower surface of the strip steel to blow out dehumidification gas;
3) and when the alarms of all the dew point meters are relieved, the online dehumidification system is automatically stopped through the PLC control system.
Further comprising: step 4) also enables to manually start and stop the online dehumidification system.
The alarm for the exceeding of the dew point is as follows:
the temperature difference Δ T is the strip temperature-dew point temperature being monitored.
In the technical scheme, the online dehumidifying and air-injecting system and the online dehumidifying and air-injecting method for finishing the oriented silicon steel and preventing corrosion thereof realize automatic functions of automatic starting, automatic stopping, automatic adjustment and the like, and effectively avoid shutdown caused by dewing of the oriented silicon steel strip due to the production field environment. Meanwhile, the online dehumidification air injection system can also eliminate the moisture remained on the surface of the oriented silicon steel when put into use, effectively improves the overall drying degree of the interior of the oriented silicon steel after being packaged, and improves the antirust capacity of the packaged oriented silicon steel finished product.
Drawings
FIG. 1 is a schematic diagram of the conventional packaging standard of a finished steel coil of oriented silicon steel;
FIG. 2 is a schematic view of a prior art grain silicon steel finishing line;
FIG. 3 is a schematic diagram of the configuration of the on-line dehumidification jet system of the present invention;
FIG. 4 is a side view of the online dehumidification jet system of the present invention;
FIG. 5 is a schematic diagram of a PLC control system versus temperature and humidity calculation program in the online dehumidification jet system according to the present invention;
FIGS. 6 and 7 are schematic diagrams of a PLC control system to humidity calculation program in the online dehumidification jet system according to the invention;
FIG. 8 is a schematic diagram of a calculation process for dew point measurement by a PLC control system in an online dehumidification jet system according to the present invention;
FIG. 9 is a schematic diagram of the PLC control system automatic control program in the online dehumidification jet system according to the present invention;
FIG. 10 is a flow chart of the operation of the on-line dehumidification jet method of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 2 to 10, in the online dehumidification jet system for finishing oriented silicon steel and preventing corrosion provided by the invention, because the air outlet of the online dehumidification jet system affects the operation of the finishing unit and the CPC (computer numerical control) deviation correction, the online dehumidification jet system is installed at the outlet of the finishing unit, and in the embodiment, the online dehumidification jet system is installed at the outlet inspection table of the finishing unit (see the position in the dashed line square in fig. 2). This online dehumidification jet system includes: the device comprises a unit support 1 for fixing and supporting equipment, an upper spray nozzle support 2 and a lower spray nozzle support 3 which are arranged on the unit support 1.
Preferably, the upper nozzle support 2 is connected with an upper nozzle 4 for blowing out dehumidifying gas in alignment with the upper surface of the strip steel, the upper nozzle support 2 is further connected with an upper nozzle control valve 5, the upper nozzle control valve 5 mainly controls the opening and the closing of the upper nozzle 4 and the flow rate of the dehumidifying gas, and the upper nozzle 4 is communicated with the upper nozzle control valve 5 through a connecting hose 6.
Preferably, the lower nozzle support 3 is connected with a lower nozzle 7 for blowing out the dehumidified gas in alignment with the lower surface of the strip steel, the lower nozzle support 3 is further connected with a lower nozzle control valve 8, the lower nozzle control valve 8 mainly controls the lower nozzle 7 to be opened and stopped and the flow of the dehumidified gas, and the lower nozzle 7 is also communicated with the lower nozzle control valve 8 through a connecting hose 6.
Preferably, the method further comprises the following steps: the dew point meters are used for detecting the dew point temperature of the finishing unit, and two groups of dew point meters are arranged in the embodiment and are respectively positioned at the inlet and the outlet of the finishing unit;
and the PLC control system is used for controlling the whole online dehumidification jet system to automatically start and stop.
Preferably, the upper spray head 4 and the lower spray head 7 are respectively positioned at two sides of the strip steel and used for offsetting the transverse acting force of the air flow on the strip steel, thereby reducing the influence on the deviation of the strip steel. Meanwhile, the mutual interference of the air flows sprayed by the upper and lower spray heads 4 and 7 is avoided, and a better dehumidification effect is achieved.
Preferably, the dehumidifying gas is compressed air or nitrogen, and meanwhile, in order to ensure the dehumidifying effect, a starting triplet needs to be arranged on the compressed air or nitrogen pipeline to perform oil outlet and dehumidification.
The invention also provides an online dehumidifying and air-injecting method for finishing the oriented silicon steel and preventing corrosion, which comprises the following steps:
1) arranging a plurality of dew point meters on the production site of a finishing unit, and respectively arranging an upper spray head 4 and a lower spray head 7 on two sides of the strip steel;
2) when any dew point instrument gives an alarm that the dew point exceeds the standard, the online dehumidification system is automatically started through the PLC control system, so that the upper spray head 4 and the lower spray head 7 respectively aim at the upper surface and the lower surface of the strip steel to blow out dehumidification gas;
3) and when the alarms of all the dew point meters are relieved, the online dehumidification system is automatically stopped through the PLC control system.
Further comprising: step 4) also enables to manually start and stop the online dehumidification system.
Preferably, the alarm for exceeding the dew point is as follows:
the temperature difference Δ T is the monitored strip temperature (or solid reference) -dew point temperature.
The dew point is calculated by the formula: [1/(t +238) -lg (u/100)/1790]-1-238, wherein t is air temperature and u is humidity.
In order to ensure the dehumidification reliability of the strip steel, Δ T at which the online dehumidification system is put into and stopped in this embodiment is set at 5 ℃.
Namely, when the temperature is less than or equal to 5 ℃, the system is automatically stopped, and when the temperature is more than 5 ℃, the system is automatically started.
The formula of the control program of the PLC control system in the online dehumidification jet system shown in fig. 5 is:
the actual humidity of the plant is [ (sensor detection reading-12800)/51200 ]. 100;
the actual temperature of the plant is [ (sensor detection reading-12800)/51200 ]. 120-20.
The control program of the PLC control system in the online dehumidification jet system shown in fig. 9:
g _ DEW _ TEMP1 (plant actual dew point 1) or G _ DEW _ TEMP2 (plant actual dew point 2) any one of which is greater than 5 degrees triggers a dehumidifier starting command;
and G _ DEW _ TEMP1 (the actual dew point of the plant is 1) is less than 5 degrees, and a dehumidifier closing command is triggered.
In order to improve the dehumidification effect to the maximum extent and save the compressed air quantity, the online dehumidification air injection system also establishes a control system of the air output and the operation speed of the finishing unit. Specifically, the gas output is large when the unit runs at a high speed, and the gas output is reduced or stopped when the unit runs at a low speed or stops. In order to ensure that the air output is matched with the speed of the unit and achieve reliable dehumidification effect, a function equation of the speed and the air output of the unit is established. The air output is in direct proportion to the running speed of the unit.
In summary, the present invention provides an automatic judgment method by compressed air (nitrogen) and electric program control. Realizing the continuous production method of the oriented silicon steel finishing machine set. The production capacity of the machine set can be improved, the shutdown of the oriented silicon steel in production caused by condensation is reduced, and the rust prevention capability of the oriented silicon steel is effectively improved. The actual production requirement of the oriented silicon steel product on the finishing machine set is met.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (7)
1. An online dehumidification air injection system for finishing and preventing corrosion of oriented silicon steel is arranged at an outlet position of a finishing unit and is characterized by comprising: the unit bracket is arranged on the upper spray nozzle bracket and the lower spray nozzle bracket on the unit bracket;
the upper spray nozzle bracket is connected with an upper spray nozzle which is used for blowing out dehumidifying gas aiming at the upper surface of the strip steel;
the lower nozzle support is connected with a lower nozzle which is used for aiming at the lower surface of the strip steel to blow out dehumidifying gas;
the upper spray head bracket is also connected with an upper spray head control valve used for controlling the opening and closing of the upper spray head;
the lower spray head bracket is also connected with a lower spray head control valve used for controlling the opening and closing of the lower spray head;
further comprising: and the PLC control system is used for controlling the start and stop of the whole online dehumidification jet system.
2. The online dehumidifying and air-jetting system for finishing the oriented silicon steel to prevent corrosion of the oriented silicon steel as claimed in claim 1, wherein: the upper spray head and the lower spray head are respectively positioned at two sides of the strip steel.
3. The online dehumidifying and air-jetting system for finishing the oriented silicon steel to prevent corrosion of the oriented silicon steel as claimed in claim 1, wherein: the dehumidifying gas is compressed air or nitrogen.
4. The online dehumidifying and air-jetting system for finishing the oriented silicon steel to prevent corrosion of the oriented silicon steel as claimed in claim 1, wherein: the upper nozzle and the upper nozzle control valve, and the lower nozzle control valve are communicated through connecting hoses.
5. An on-line dehumidification gas injection method for finishing the oriented silicon steel to prevent corrosion according to any one of claims 1 to 4, which is characterized by comprising the following steps:
1) arranging a plurality of dew point meters on the production field of a finishing unit, and respectively arranging an upper spray head and a lower spray head on two sides of the strip steel;
2) when any dew point instrument gives an alarm that the dew point exceeds the standard, the online dehumidification system is automatically started through the PLC control system, so that the upper spray head and the lower spray head respectively aim at the upper surface and the lower surface of the strip steel to blow out dehumidification gas;
3) and when the alarms of all the dew point meters are relieved, the online dehumidification system is automatically stopped through the PLC control system.
6. The on-line dehumidification air injection method for finishing the oriented silicon steel to prevent the corrosion of the oriented silicon steel as set forth in claim 5, further comprising: step 4) also enables to manually start and stop the online dehumidification system.
7. The on-line dehumidification air injection method for finishing the oriented silicon steel to prevent the corrosion in claim 5, wherein the method comprises the following steps: the alarm for the exceeding of the dew point is as follows:
the temperature difference Δ T is the strip temperature-dew point temperature being monitored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810628115.3A CN110618649A (en) | 2018-06-19 | 2018-06-19 | Online dehumidification air injection system and method for finishing and preventing corrosion of oriented silicon steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810628115.3A CN110618649A (en) | 2018-06-19 | 2018-06-19 | Online dehumidification air injection system and method for finishing and preventing corrosion of oriented silicon steel |
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| CN110618649A true CN110618649A (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810628115.3A Pending CN110618649A (en) | 2018-06-19 | 2018-06-19 | Online dehumidification air injection system and method for finishing and preventing corrosion of oriented silicon steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114113216A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Early warning method for dewing of coil warehouse with steel plate |
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| CN101619460A (en) * | 2009-07-28 | 2010-01-06 | 中冶南方工程技术有限公司 | Method for preventing condensation and rustiness on metal surface |
| CN102876864A (en) * | 2012-09-25 | 2013-01-16 | 攀钢集团西昌钢钒有限公司 | Control system and closed-loop control method for hearth atmosphere of annealing furnace and closed-loop control method |
| CN105811275A (en) * | 2016-04-19 | 2016-07-27 | 国家电网公司 | Rotary dehumidifier-type condensation dehumidification device for metal-clad equipment and control method of rotary dehumidifier-type condensation dehumidification device |
| CN105921384A (en) * | 2016-06-23 | 2016-09-07 | 成都新图新材料股份有限公司 | Single-face drying system for aluminum substrate coating process |
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2018
- 2018-06-19 CN CN201810628115.3A patent/CN110618649A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619460A (en) * | 2009-07-28 | 2010-01-06 | 中冶南方工程技术有限公司 | Method for preventing condensation and rustiness on metal surface |
| CN102876864A (en) * | 2012-09-25 | 2013-01-16 | 攀钢集团西昌钢钒有限公司 | Control system and closed-loop control method for hearth atmosphere of annealing furnace and closed-loop control method |
| CN105811275A (en) * | 2016-04-19 | 2016-07-27 | 国家电网公司 | Rotary dehumidifier-type condensation dehumidification device for metal-clad equipment and control method of rotary dehumidifier-type condensation dehumidification device |
| CN105921384A (en) * | 2016-06-23 | 2016-09-07 | 成都新图新材料股份有限公司 | Single-face drying system for aluminum substrate coating process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114113216A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Early warning method for dewing of coil warehouse with steel plate |
| CN114113216B (en) * | 2020-08-26 | 2023-10-13 | 宝山钢铁股份有限公司 | Dew-condensation early warning method for coiled warehouse with steel plates |
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Application publication date: 20191227 |
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| RJ01 | Rejection of invention patent application after publication |