CN109471405B - Annealing furnace heating pipe current monitoring and reforming device - Google Patents
Annealing furnace heating pipe current monitoring and reforming device Download PDFInfo
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- CN109471405B CN109471405B CN201811524773.4A CN201811524773A CN109471405B CN 109471405 B CN109471405 B CN 109471405B CN 201811524773 A CN201811524773 A CN 201811524773A CN 109471405 B CN109471405 B CN 109471405B
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- heating pipe
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 41
- 238000000137 annealing Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 238000002407 reforming Methods 0.000 title claims description 5
- 238000012806 monitoring device Methods 0.000 claims abstract description 8
- 230000009466 transformation Effects 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims abstract description 3
- 238000004364 calculation method Methods 0.000 claims description 14
- 238000004458 analytical method Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- G05B19/058—Safety, monitoring
-
- 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
-
- 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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- 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
-
- 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
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/14—Plc safety
- G05B2219/14006—Safety, monitoring in general
Abstract
The invention introduces a current monitoring transformation device for a heating pipe of an annealing furnace, which comprises a heating pipe arranged at the bottom of the annealing furnace, wherein the heating pipe is connected with a power supply cable, a current monitoring device is arranged on the power supply cable, the current monitoring device consists of a current transformer module, a transmitter module and a PLC analog input module, the input end of the current transformer module is electrically connected with the power supply cable, the output end of the current transformer module is connected with the input end of the transmitter module, the output end of the transmitter module is connected with the input end of the PLC analog input module, and the output end of the PLC analog input module is in communication connection with an operation terminal. The transformation device can find out the fault problem at the first time, give an alarm in a feedback way, has good reliability and high response speed, reduces the accident occurrence rate, obviously reduces the reject rate, and saves a great amount of cost for enterprises.
Description
Technical Field
The invention relates to a transformation technology of an annealing furnace, in particular to a current monitoring transformation device of a heating pipe of the annealing furnace, and belongs to the technical field of copper pipe machining.
Background
At present, in the process of producing and manufacturing high-precision copper tubes, annealing treatment is one of important procedures, namely, annealing is a metal heat treatment process of slowly heating metal to a certain temperature, keeping the metal for a sufficient time and then cooling the metal at a proper speed. The method aims to soften the material subjected to casting, forging and stretching, improve plasticity and toughness, homogenize chemical components, remove residual stress or obtain expected physical properties, and the main factors of annealing influencing the hardness of the copper pipe are grain size, and the main factors influencing the grain size are annealing temperature and heat preservation time. At present, when an annealing treatment procedure is carried out, an annealing furnace is needed, and the annealing furnace is heated to heat the copper pipe, and because the annealing furnace is heated by an electric heating pipe, when the heating pipe is abnormal, the heating temperature is affected, so that hidden danger is caused to the quality of copper pipe products. In addition, the current of each heating pipe is not monitored in real time in the currently used annealing furnace, and operators can only judge the abnormality of the heating pipe through the temperature change, but cannot intuitively find the quality of the heating pipe, so that the quality accident of the product in batches is easy to cause.
Disclosure of Invention
Aiming at the defects in the prior art, the invention mainly aims to solve the problem that faults cannot be found in time due to the lack of a monitoring means for the quality of a heating pipe in the existing annealing furnace, and introduces a heating pipe current monitoring and reforming device of the annealing furnace, which can monitor the current of the heating pipe in real time.
The technical scheme of the invention is as follows: the current monitoring transformation device for the heating pipe of the annealing furnace comprises a heating pipe arranged at the bottom of the annealing furnace, wherein the heating pipe is connected with a power supply cable;
the current transformer module comprises: the system is used for collecting current original signals on the power supply cable in real time, converting the collected current original signals into analog current signals, and then sending the analog current signals to the transmitter module;
the transmitter module: the PLC analog quantity input module is used for receiving the analog current signals input by the current transformer module, converting the analog current signals into standard current signals and outputting the standard current signals to the PLC analog quantity input module;
the PLC analog input module is used for: the system comprises a transmitter module, an operation terminal, a control signal and a control signal, wherein the transmitter module is used for receiving a standard current signal input by the transmitter module, calculating and analyzing the standard current signal, and then sending an analysis result to the operation terminal through the control signal;
the operation terminal: the control signal is used for receiving the control signal sent by the PLC analog input module and displaying the current state through the display screen;
when the PLC analog input module is used for calculation and analysis, the analysis and calculation are carried out through the following steps:
1) Normalizing the received standard current signal to a digital quantity of 0-27648;
2) Converting the normalized digital quantity in the step 1) into an engineering value of 0-400A;
3) Substituting the engineering value obtained in the step 2) into a formula as an unknown number X: y= (X/27648) ×400, then calculating the value of Y;
4) Detecting a real-time temperature value of the heating pipe, and performing PID calculation on a difference value between the real-time temperature value and a preset temperature value to obtain a pulse signal change percentage;
5) When the change percentage of the pulse signal reaches 100%, comparing the Y value in the step 3) with a preset normal value 14860, and generating an alarm signal if the Y value is smaller than the normal value 14860; if the Y value is greater than or equal to the normal value 14860, no alarm signal is generated;
6) And outputting the alarm signal to the operation terminal for display and alarm.
In the invention, the PID calculation method adopted in the PLC analog input module is an existing calculation method, and a person skilled in the art can know that the PID calculation method is a temperature calculation method commonly used on industrial control equipment, and the PID calculation method is introduced and combined with a preset calculation method to help judge whether the heating pipe current is in a normal state.
Optimally, the value of the analog current signal is 0-5A, and the value of the standard current signal is 4-20mA.
Optimally, the model of the current transformer module is BH-0.66.
Optimally, the model of the transmitter module is MIK-DJ.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the reconstruction device, through real-time monitoring of the current of the heating pipe, the fault problem can be found at the first time, and the feedback alarm is given, so that the problem that workers are unaware after the heating pipe is damaged at present is solved, and the batch quality accident of the copper pipe can be completely eradicated.
2. The reliability is better, the response speed is high, no personnel is required to watch, the automatic monitoring and management of the annealing furnace is realized, and the safety in the production process is obviously improved.
3. As the accident occurrence rate is reduced, the reject rate is obviously reduced, thereby saving a great deal of cost for enterprises.
Drawings
FIG. 1 is a schematic diagram of a device for modifying the current monitoring of a heating pipe of an annealing furnace;
fig. 2 is a schematic structural diagram of a current monitoring device in the present invention.
In the figure, a 1-heating pipe, a 2-power supply cable, a 3-current monitoring device, a 31-current mutual inductance module, a 32-transmitter module, a 33-PLC analog input module and a 4-operation terminal.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 1-2, the current monitoring and reforming device for the annealing furnace heating pipe comprises a heating pipe 1 arranged at the bottom of the annealing furnace, wherein the heating pipe 1 is connected with a power supply cable 2, and the heating pipe 1 heats the annealing furnace after heating. The invention is characterized in that a current monitoring device 3 is arranged on the power supply cable 2, the current monitoring device 3 is composed of a current transformer module 31, a transmitter module 32 and a PLC analog input module 33, the input end of the current transformer module 31 is electrically connected with the power supply cable 2, the output end of the current transformer module 31 is connected with the input end of the transmitter module 32, the output end of the transmitter module 32 is connected with the input end of the PLC analog input module 33, and the output end of the PLC analog input module 33 is in communication connection with the operation terminal 4; the current transformer module 31: the current source device is used for collecting current source signals on the power supply cable 2 in real time, converting the collected current source signals into analog current signals and sending the analog current signals to the transmitter module 32; the transmitter module 32: the current transformer is used for receiving the analog current signal input by the current transformer module 31, converting the analog current signal into a standard current signal, and outputting the standard current signal to the PLC analog input module 33; the PLC analog input module 33: for receiving the standard current signal inputted by the transmitter module 32, performing calculation analysis on the standard current signal, and then transmitting the analysis result to the operation terminal 4 through the control signal; the operation terminal 4: and is used for receiving the control signal sent by the PLC analog input module 33 and displaying the current state through the display screen.
In the invention, the PLC analog input module performs analysis and calculation through the following steps:
1) Normalizing the received standard current signal to a digital quantity of 0-27648;
2) Converting the normalized digital quantity in the step 1) into an engineering value of 0-400A;
3) Substituting the engineering value obtained in the step 2) into a formula as an unknown number X: y= (X/27648) ×400, then calculating the value of Y;
4) Detecting a real-time temperature value of the heating pipe, and performing PID calculation on a difference value between the real-time temperature value and a preset temperature value to obtain a pulse signal change percentage;
5) When the change percentage of the pulse signal reaches 100%, comparing the Y value in the step 3) with a preset normal value 14860, and generating an alarm signal if the Y value is smaller than the normal value 14860; if the Y value is greater than or equal to the normal value 14860, no alarm signal is generated;
6) The alarm signal is output to the operation terminal 4 for display and alarm.
In the invention, the value of the analog current signal is 0-5A, the value of the standard current signal is 4-20mA, the model of the current transformer module is BH-0.66, and the model of the transmitter module is MIK-DJ.
During operation, the current transformer module 31 detects a current signal on the power supply cable 2 and converts the detected current signal into an analog current signal of 0-5A, wherein the analog current signal is usually 5A, then the current transformer module 31 inputs the analog current signal into the transmitter module 32, the transmitter module 32 converts the analog current signal into a standard current signal of 4-20mA, then the transmitter module 32 inputs the standard current signal into the PLC analog input module 33, the PLC analog input module 33 calculates the standard current signal and then outputs the signal to the operation terminal 4 for display, and the operation terminal 4 adopts a common industrial personal computer display terminal.
The reconstruction device can monitor the state of each heating pipe on line in real time and track the abnormal condition, thereby changing the intermittent mode of the previous periodic inspection and greatly reducing the occurrence rate of equipment abnormality. After the improvement of the invention is completed, when the heating pipe is blown and other anomalies occur, the improved device can be displayed through current, and an operator can timely find out through a monitoring picture to inform maintenance personnel to process, so that the temperature influence caused by long-time heating anomalies is avoided. The method realizes the purposes of timely discovery and treatment and timely tracking, can avoid the hidden quality trouble of products caused by annealing temperature, and improves the controllability of equipment.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and although the applicant has described the present invention in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents of the technical solution of the present invention can be made without departing from the spirit and scope of the technical solution, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (4)
1. The current monitoring transformation device for the annealing furnace heating pipe comprises a heating pipe (1) arranged at the bottom of the annealing furnace, wherein the heating pipe (1) is connected with a power supply cable (2), and is characterized in that a current monitoring device (3) is arranged on the power supply cable (2), the current monitoring device (3) is composed of a current transformer module (31), a transmitter module (32) and a PLC analog input module (33), the input end of the current transformer module (31) is electrically connected with the power supply cable (2), the output end of the current transformer module (31) is connected with the input end of the transmitter module (32), the output end of the transmitter module (32) is connected with the input end of the PLC analog input module (33), and the output end of the PLC analog input module (33) is in communication connection with an operation terminal (4);
the current transformer module (31): the system is used for collecting current original signals on the power supply cable (2) in real time, converting the collected current original signals into analog current signals, and then sending the analog current signals to the transmitter module (32);
the transmitter module (32): the PLC analog quantity input module (33) is used for receiving the analog current signal input by the current transformer module (31), converting the analog current signal into a standard current signal and outputting the standard current signal to the PLC analog quantity input module;
the PLC analog input module (33): the system is used for receiving a standard current signal input by a transmitter module (32), calculating and analyzing the standard current signal, and then transmitting an analysis result to an operation terminal (4) through a control signal;
the operation terminal (4): the control signal is used for receiving the control signal sent by the PLC analog input module (33) and displaying the current state through the display screen;
the PLC analog input module (33) performs analysis and calculation through the following steps:
normalizing the received standard current signal to a digital quantity of 0-27648;
converting the normalized digital quantity in the step 1) into an engineering value of 0-400A;
substituting the engineering value obtained in the step 2) into a formula as an unknown number X: y= (X/27648) ×400, then calculating the value of Y;
detecting a real-time temperature value of the heating pipe, and performing PID calculation on a difference value between the real-time temperature value and a preset temperature value to obtain a pulse signal change percentage;
when the change percentage of the pulse signal reaches 100%, comparing the Y value in the step 3) with a preset normal value 14860, and generating an alarm signal if the Y value is smaller than the normal value 14860; if the Y value is greater than or equal to the normal value 14860, no alarm signal is generated;
and outputting an alarm signal to an operation terminal (4) for display and alarm.
2. The annealing furnace heating pipe current monitoring reconstruction device according to claim 1, wherein the value of the analog current signal is 0-5A, and the value of the standard current signal is 4-20mA.
3. The annealing furnace heating pipe current monitoring and reforming device according to claim 2, wherein the current transformer module (31) is BH-0.66.
4. A lehr heating tube current monitoring retrofit installation according to claim 3, characterized in that the transmitter module (32) is of the type MIK-DJ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524773.4A CN109471405B (en) | 2018-12-13 | 2018-12-13 | Annealing furnace heating pipe current monitoring and reforming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524773.4A CN109471405B (en) | 2018-12-13 | 2018-12-13 | Annealing furnace heating pipe current monitoring and reforming device |
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| Publication Number | Publication Date |
|---|---|
| CN109471405A CN109471405A (en) | 2019-03-15 |
| CN109471405B true CN109471405B (en) | 2024-03-19 |
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| CN201811524773.4A Active CN109471405B (en) | 2018-12-13 | 2018-12-13 | Annealing furnace heating pipe current monitoring and reforming device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112505584B (en) * | 2020-11-27 | 2024-01-12 | 重庆龙煜精密铜管有限公司 | Positioning system for earth leakage fault point of heating tube of annealing furnace |
| CN113985935A (en) * | 2021-05-29 | 2022-01-28 | 苏州芯默科技有限公司 | Method for real-time monitoring process state of rapid heating furnace by current value |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH161170A (en) * | 1931-05-23 | 1933-04-15 | Siemens Ag | Method and device for regulating the temperature in an electrically heated shaft annealing furnace. |
| US3301483A (en) * | 1963-05-10 | 1967-01-31 | Wiener Schwachstromwerke Gmbh | Regulating device for furnaces, particularly annealing furnaces |
| CN1171448A (en) * | 1996-06-06 | 1998-01-28 | 伊西康公司 | Constant current needle annealing |
| CN101592961A (en) * | 2008-05-26 | 2009-12-02 | Ls产电株式会社 | Temperature control modules and temperature-controlled process |
| CN103209796A (en) * | 2010-11-19 | 2013-07-17 | 三菱电机株式会社 | Wire electrode annealing treatment method and wire electric discharge machine |
| CN206618503U (en) * | 2016-11-29 | 2017-11-07 | 上海日港置信非晶体金属有限公司 | A kind of amorphous core is heat-treated intelligent monitoring and controlling device |
| CN209373409U (en) * | 2018-12-13 | 2019-09-10 | 重庆龙煜精密铜管有限公司 | Device is transformed in annealing furnace heating tube current monitoring |
-
2018
- 2018-12-13 CN CN201811524773.4A patent/CN109471405B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH161170A (en) * | 1931-05-23 | 1933-04-15 | Siemens Ag | Method and device for regulating the temperature in an electrically heated shaft annealing furnace. |
| US3301483A (en) * | 1963-05-10 | 1967-01-31 | Wiener Schwachstromwerke Gmbh | Regulating device for furnaces, particularly annealing furnaces |
| CN1171448A (en) * | 1996-06-06 | 1998-01-28 | 伊西康公司 | Constant current needle annealing |
| CN101592961A (en) * | 2008-05-26 | 2009-12-02 | Ls产电株式会社 | Temperature control modules and temperature-controlled process |
| CN103209796A (en) * | 2010-11-19 | 2013-07-17 | 三菱电机株式会社 | Wire electrode annealing treatment method and wire electric discharge machine |
| CN206618503U (en) * | 2016-11-29 | 2017-11-07 | 上海日港置信非晶体金属有限公司 | A kind of amorphous core is heat-treated intelligent monitoring and controlling device |
| CN209373409U (en) * | 2018-12-13 | 2019-09-10 | 重庆龙煜精密铜管有限公司 | Device is transformed in annealing furnace heating tube current monitoring |
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