CN111074060A - Protective structure for preventing condensation of water-cooling roller and using method thereof - Google Patents
Protective structure for preventing condensation of water-cooling roller and using method thereof Download PDFInfo
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- CN111074060A CN111074060A CN201911297778.2A CN201911297778A CN111074060A CN 111074060 A CN111074060 A CN 111074060A CN 201911297778 A CN201911297778 A CN 201911297778A CN 111074060 A CN111074060 A CN 111074060A
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- water
- pipeline
- regulating valve
- cooling roller
- cooling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
- C21D9/563—Rolls; Drums; Roll arrangements
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
Abstract
The invention relates to the field of water-cooled rollers, in particular to a protective structure for preventing dewing of a water-cooled roller and a use method thereof, wherein the water-cooled roller is axially provided with a cooling channel, one end of the cooling channel is connected with a water inlet pipeline, the other end of the cooling channel is connected with a water outlet pipeline, the protective structure comprises a branch pipeline connected in parallel on the water outlet pipeline, and the water outlet pipeline is provided with a manual regulating valve; the branch pipeline is provided with a first electromagnetic regulating valve for controlling the on-off of the branch pipeline; and two ends of the branch pipeline are arranged on two sides of the manual regulating valve on the water outlet pipeline. The invention discloses a protective structure for preventing dewing of a water-cooling roller, which can be used for controlling the speed and the flow of cooling water flowing out of the water-cooling roller by adding a branch pipeline and can be automatically adjusted according to requirements; therefore, the water-cooled roller of the annealing furnace can be prevented from generating condensation, the surface of the finished silicon steel coil can be prevented from generating watermarks, specks, stripes and the like, the surface defects of the strip steel are reduced, and the yield is improved.
Description
Technical Field
The invention relates to the field of water-cooled rollers, in particular to a protective structure for preventing dewing of a water-cooled roller and a using method thereof.
Background
The annealing furnace of the silicon steel continuous annealing line is an important process link for determining the performance and the quality of the silicon steel product, and the atmosphere in the annealing furnace directly influences the quality of the product.
The PH/NOF furnace is internally provided with 19 water-cooling rollers, and the 19 water-cooling rollers are cooled by water flowing in steel rollers due to high temperature in the furnace.
Sometimes, when the water flow in the water-cooling roller is large, the temperature difference between the inside and the outside of the steel roller is large, water drops are easy to seep out, dew is generated, and the water drops are attached to the lower surface of strip steel, so that watermarks, specks, stripes and the like are generated on the lower surface of silicon steel, and when the water flow in the water-cooling roller is small, the roller cooling effect is poor, and the roller is easy to be scalded due to overhigh temperature. Because the cooling of the water-cooled rolls needs to be optimized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a protection structure for preventing the water-cooling roller from dewing by controlling the flow rate of cooling water inside the water-cooling roller.
In order to achieve the purpose, the invention adopts the technical scheme that:
a protection structure for preventing moisture condensation of a water-cooling roller is characterized in that the water-cooling roller is axially provided with a cooling channel, one end of the cooling channel is connected with a water inlet pipeline, the other end of the cooling channel is connected with a water outlet pipeline, the protection structure comprises a branch pipeline connected in parallel on the water outlet pipeline, and the water outlet pipeline is provided with a manual regulating valve; the branch pipeline is provided with a first electromagnetic regulating valve for controlling the on-off of the branch pipeline; and two ends of the branch pipeline are arranged on two sides of the manual regulating valve on the water outlet pipeline.
And a first flowmeter is arranged on the branch pipeline.
The water outlet pipeline is connected with a confluence pipeline, and the diameter of the confluence pipeline is larger than that of the water outlet pipeline; and a second flowmeter and a thermometer are arranged on the confluence pipeline.
The protective structure is provided with a control system, the control system comprises a detection module, the detection module is connected with a control module, and the control module is connected with an execution module.
The protective structure also comprises a backflow pipeline, wherein one end of the backflow pipeline is connected with the confluence pipeline, and the other end of the backflow pipeline is connected with the water inlet pipeline; and a second electromagnetic control valve and a third flow meter are arranged on the return pipeline.
And the branch pipeline and the return pipeline are provided with one-way valves.
A use method of the protective structure for preventing the dewing of the water-cooling roller comprises the following steps:
(1) a branch pipeline connected in parallel is added at a manual regulating valve in each water-cooling roller water outlet pipeline loop, and a first electromagnetic regulating valve and a first flowmeter are installed on the branch pipeline; installing a second flowmeter and a thermometer on the confluence pipeline behind the parallel loop;
(2) when in use, the manual regulating valve is required to be always at a fixed opening degree; data obtained by detection of the thermometer is fed back to the control system, the control system identifies and judges the data, and sends an instruction to control the opening degree of the first electromagnetic regulating valve; thereby ensuring the temperature of each water-cooled roller to be constant.
The invention has the advantages that:
the invention discloses a protective structure for preventing dewing of a water-cooling roller, which can be used for controlling the speed and the flow of cooling water flowing out of the water-cooling roller by adding a branch pipeline and can be automatically adjusted according to requirements; therefore, the water-cooled roller of the annealing furnace can be prevented from generating condensation, the surface of the finished silicon steel coil can be prevented from generating watermarks, specks, stripes and the like, the surface defects of the strip steel are reduced, and the yield is improved.
Drawings
The following is a brief description of the various views of the present specification:
fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a partially enlarged view of the branched duct of the present invention.
Fig. 3 is a schematic diagram of an optimized structure in the invention.
FIG. 4 is a schematic structural view of the silicon steel continuous annealing furnace used in the PH/NOF section of the annealing furnace.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
A protection structure for preventing moisture condensation of a water-cooling roller is characterized in that a cooling channel is axially arranged on the water-cooling roller 2, one end of the cooling channel is connected with a water inlet pipeline 1, the other end of the cooling channel is connected with a water outlet pipeline 3, the protection structure comprises a branch pipeline 5 connected on the water outlet pipeline 3 in parallel, and a manual adjusting valve 4 is arranged on the water outlet pipeline 3; a first electromagnetic regulating valve 6 for controlling the on-off of the branch pipeline 5 is arranged on the branch pipeline 5; two ends of the branch pipeline 5 are arranged on two sides of the manual regulating valve 4 on the water outlet pipeline 3; the invention discloses a protective structure for preventing dewing of a water-cooling roller 2, which can be used for controlling the speed and the flow of cooling water flowing out of the water-cooling roller 2 by adding a branch pipeline 5 and can be automatically adjusted according to requirements; therefore, the water-cooled roller 2 of the annealing furnace can be prevented from generating condensation, the surface of the finished silicon steel coil can be prevented from generating watermarks, specks, stripes and the like, the surface defects of the strip steel are reduced, and the yield is improved; in addition, the invention uses the electromagnetic valve, can regulate the opening degree of the branch pipeline 5 independently under the control of the control system, has avoided the trouble regulated manually, at the same time under the control of the control system, the control of the electromagnetic valve of the invention is more accurate.
Preferably, in the present invention, a first flow meter 7 is disposed on the branch pipe 5; the first flow meter 7 is arranged to detect the amount of cooling water flowing out of the branch pipe 5, and to feed back a signal for confirming whether the opening degree of the first electromagnetic adjusting valve 6 is satisfactory or not.
Preferably, the water outlet pipe 3 is connected with a confluence pipe 8, and the diameter of the confluence pipe 8 is larger than that of the water outlet pipe 3; a second flowmeter 9 and a thermometer 10 are arranged on the confluence pipeline 8; through the arrangement of the second flowmeter 9 and the thermometer 10, subsequent calibration can be performed; and the second time is used for judging whether the flowing cooling liquid meets the design requirement, and if the flowing cooling liquid does not meet the design requirement, the first electromagnetic regulating valve 6 needs to be adjusted again until the flowing cooling liquid meets the design requirement.
The protection structure is provided with a control system, the control system comprises a detection module, the detection module is connected with a control module, and the control module is connected with an execution module; the detection module is a first flowmeter 7, a second flowmeter 9, a third flowmeter 13, a thermometer 10 and the like, the thermometer 10 can be replaced by a temperature sensor, and can be specifically set according to needs, after the detection and identification of the detection module, respective signals are transmitted to the control module, the notification module can use a traditional PLC system, the PLC system can be regarded as a traditional computer, the PLC system carries out identification and judgment and sends instructions to the execution module, and the execution module can be a first electromagnetic regulating valve 6 or a second regulating valve and the like and is used for controlling the on-off and flow of each pipeline; of course, the execution module may also be some warning components, such as a warning light or a speaker, etc., for reminding the operation.
Preferably, the protective structure further comprises a backflow pipeline 11, wherein one end of the backflow pipeline 11 is connected with the confluence pipeline 8, and the other end of the backflow pipeline 11 is connected with the water inlet pipeline; a second electromagnetic control valve 12 and a third flow meter 13 are arranged on the return pipeline 11; the return pipe 11 plays a certain temperature compensation role, mainly in winter, if the adjusting range of the first solenoid valve can not make the water-cooling roller 2 be in a proper position, it is necessary to perform temperature compensation on the cooling water entering the water-cooling roller 2, and because the temperature of the cooling water going out from the water-cooling roller 2 has risen, a part of the water liquid can be selected to perform temperature compensation, so that the whole temperature of the whole water-cooling roller 2 is ensured to be constant, and the generation of water drops is reduced or avoided.
Preferably, check valves are arranged on the branch pipeline 5 and the return pipeline 11; the reverse flow of the cooling liquid is avoided.
A use method of the anti-condensation protective structure for the water-cooling roller 2 comprises the following steps:
(1) a branch pipeline 5 connected in parallel is added at a manual regulating valve 4 in a loop of a water outlet pipeline 3 of each water-cooling roller 2, and a first electromagnetic regulating valve 6 and a first flow meter 7 are installed on the branch pipeline 5; a second flowmeter 9 and a thermometer 10 are arranged on the confluence pipeline 8 behind the parallel circuits;
(2) when in use, the manual regulating valve 4 is required to be always at a fixed opening degree; the data detected by the thermometer 10 is fed back to the control system, the control system identifies and judges and sends an instruction to control the opening degree of the first electromagnetic regulating valve 6; thereby ensuring the temperature of each water-cooled roll 2 to be constant.
The following discussion refers to specific embodiments:
and the PH/NOF section of the silicon steel continuous annealing furnace is 19 water-cooled steel rollers in total. Each roller is driven to rotate by an independent variable frequency motor, the inside of the roller is hollow, two ends of the roller are connected with water pipes, cooling water flows in from the operation side, and cooling water flows out from the transmission side and is used for cooling the roller. The water outlet pipe at the transmission side is provided with a manual adjusting valve 4 for adjusting the water flow.
In the production process, the water temperature at the outlet of the water-cooling roller 2 needs to be regularly measured by holding the point temperature gun, and the opening degree of the 4-door is manually adjusted according to the water temperature, so that the water-cooling roller 2 is prevented from generating condensation. However, the manual regulation precision is not high, the water flow is small and large, the outlet water temperature control is unstable, and the furnace roller is easy to generate condensation. To eliminate such drawbacks, we use the protective structure disclosed in the present invention.
A parallel branch pipeline 5 is additionally arranged at a manual regulating valve 4 in an outlet water pipe loop of each water-cooling roller 2, an electromagnetic regulating valve and a flowmeter are arranged on the branch pipeline 5, and a flowmeter and a thermometer 10 are arranged on a confluence pipeline 8 behind the parallel loop.
The protection structure is designed into a branch pipeline 5 which is connected with the manual regulating valve 4 in parallel, so as to prevent the electromagnetic valve from being damaged, and cooling water cannot flow to cause the water cooling roller 2 to be scalded.
The manual regulating valve 4 is always in a fixed opening degree, even if the electromagnetic valve is damaged, cold water can pass through the roller, and therefore the roller cannot be damaged.
The device is controlled by a set of independent PLC system, the flow meter, the thermometer 10 and the electromagnetic valve are all subjected to signal acquisition, processing and control by the PLC system, and the opening and closing limit states of the manual regulating valve 4 also enter the PLC system for control and protection.
Meanwhile, all information (temperature, flow, valve opening and closing state, valve operation and the like) of the control system is displayed in a special operation computer picture for monitoring and operation of an operator, and once the outlet water temperature of a certain roller is overhigh, the valve is damaged, the flow is overlow and the like, alarm information can be automatically popped in the picture to prompt the operator to check and process.
Under the automatic control state, generally without manual intervention, the system can automatically adjust the opening degree of the electromagnetic valve according to the actual water temperature on the water outlet pipeline 3 to ensure the constant temperature, the constant temperature T is a fixed value, and the temperature T values of all the water cooling rollers 2 are different. Namely, the outlet water temperatures T1-T19 of the 19 water-cooled rollers 2 are different.
The PLC system will automatically adjust according to the set temperature T1-T19 of each water-cooled roll 2. The 19 temperature values T1-T19 are key factors for ensuring that the water cooling roller 2 does not generate condensation, the system carries out automatic adjustment, errors caused by manually adjusting the manual adjusting valve 4 at the outlet of the water cooling roller 2 can be eliminated, and an operator does not need to regularly go to the site to carry out manual water temperature measurement; all instrument signals and control signals are processed by the same PLC.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (7)
1. A protection structure for preventing dewing of a water-cooling roller is characterized in that the protection structure comprises a branch pipeline connected in parallel on a water outlet pipeline, and the water outlet pipeline is provided with a manual regulating valve; the branch pipeline is provided with a first electromagnetic regulating valve for controlling the on-off of the branch pipeline; and two ends of the branch pipeline are arranged on two sides of the manual regulating valve on the water outlet pipeline.
2. The protective structure for preventing condensation of the water cooling roller according to claim 1, wherein the branch pipeline is provided with a first flowmeter.
3. The protective structure for preventing the dewing of the water-cooling roller as claimed in claim 1, wherein a confluence pipeline is connected to the water outlet pipeline, and the diameter of the confluence pipeline is larger than that of the water outlet pipeline; and a second flowmeter and a thermometer are arranged on the confluence pipeline.
4. The water-cooling roller protection structure for preventing dewing according to claim 1, characterized in that the protection structure is provided with a control system, the control system comprises a detection module, the detection module is connected with a control module, and the control module is connected with an execution module.
5. The protective structure for preventing the dewing of the water-cooling roller as claimed in claim 1, wherein the protective structure further comprises a return pipe, one end of the return pipe is connected with the confluence pipe, and the other end of the return pipe is connected with the water inlet pipe; and a second electromagnetic control valve and a third flow meter are arranged on the return pipeline.
6. The protection structure for preventing the dewing of the water-cooling roller as claimed in claim 5, wherein the branch pipe and the return pipe are provided with check valves.
7. The use method of the water-cooling roller anti-condensation protection structure is characterized by comprising the following steps:
(1) a branch pipeline connected in parallel is added at a manual regulating valve in each water-cooling roller water outlet pipeline loop, and a first electromagnetic regulating valve and a first flowmeter are installed on the branch pipeline; installing a second flowmeter and a thermometer on the confluence pipeline behind the parallel loop;
(2) when in use, the manual regulating valve is required to be always at a fixed opening degree; data obtained by detection of the thermometer is fed back to the control system, the control system identifies and judges the data, and sends an instruction to control the opening degree of the first electromagnetic regulating valve; thereby ensuring the temperature of each water-cooled roller to be constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911297778.2A CN111074060A (en) | 2019-12-13 | 2019-12-13 | Protective structure for preventing condensation of water-cooling roller and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911297778.2A CN111074060A (en) | 2019-12-13 | 2019-12-13 | Protective structure for preventing condensation of water-cooling roller and using method thereof |
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| Publication Number | Publication Date |
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| CN111074060A true CN111074060A (en) | 2020-04-28 |
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| CN201911297778.2A Pending CN111074060A (en) | 2019-12-13 | 2019-12-13 | Protective structure for preventing condensation of water-cooling roller and using method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194610A (en) * | 1996-05-02 | 1998-09-30 | 日本宝德温株式会社 | Roller temperature controlling system |
| CN202427713U (en) * | 2011-12-14 | 2012-09-12 | 宝山钢铁股份有限公司 | Cooling device for hot rolling mill |
| CN105215312A (en) * | 2015-09-30 | 2016-01-06 | 宝山钢铁股份有限公司 | A kind of double-roll thin-belt continuous casting roller cooling water flow amount control method |
| CN207622332U (en) * | 2017-11-27 | 2018-07-17 | 江苏金诺炉辊有限公司 | A kind of water cooled rolls cooling recirculation system |
| CN211005541U (en) * | 2019-12-13 | 2020-07-14 | 马鞍山钢铁股份有限公司 | Protective structure for preventing condensation of water-cooling roller |
-
2019
- 2019-12-13 CN CN201911297778.2A patent/CN111074060A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194610A (en) * | 1996-05-02 | 1998-09-30 | 日本宝德温株式会社 | Roller temperature controlling system |
| CN202427713U (en) * | 2011-12-14 | 2012-09-12 | 宝山钢铁股份有限公司 | Cooling device for hot rolling mill |
| CN105215312A (en) * | 2015-09-30 | 2016-01-06 | 宝山钢铁股份有限公司 | A kind of double-roll thin-belt continuous casting roller cooling water flow amount control method |
| CN207622332U (en) * | 2017-11-27 | 2018-07-17 | 江苏金诺炉辊有限公司 | A kind of water cooled rolls cooling recirculation system |
| CN211005541U (en) * | 2019-12-13 | 2020-07-14 | 马鞍山钢铁股份有限公司 | Protective structure for preventing condensation of water-cooling roller |
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