CN111471841A - High-precision hot air type surface heat treatment control system - Google Patents
High-precision hot air type surface heat treatment control system Download PDFInfo
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- CN111471841A CN111471841A CN202010303731.9A CN202010303731A CN111471841A CN 111471841 A CN111471841 A CN 111471841A CN 202010303731 A CN202010303731 A CN 202010303731A CN 111471841 A CN111471841 A CN 111471841A
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/53—Heating in fluidised beds
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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
- C21D11/00—Process control or regulation for heat treatments
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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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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Abstract
The utility model provides a hot-blast formula surface heat treatment control system of high accuracy, includes the control unit, and the hot-fluid forms the unit, hot-fluid distribution unit, valve control system, heat treatment cavity has main heating fluid import and hot-fluid discharge port, hot-fluid form the unit through hot-fluid distribution unit connects main heating fluid import 1 carries out energy recuperation to the hot-fluid, and accurate control hot-fluid temperature field has solved complicated work piece surface treatment difficulty, the low problem of control accuracy, matches the air door aperture through flow control simultaneously, has formed the temperature field that has different temperature regions of even velocity of flow near treating the work piece surface effectively, has realized the surface heat treatment needs of complicated work piece or multiaspect work piece conveniently.
Description
The technical field is as follows:
the invention relates to the field of heat treatment control, in particular to a high-precision hot air type surface heat treatment control system.
Background art:
in the prior art, in order to perform surface heat treatment on a workpiece to be treated, a method is generally adopted that a large workpiece to be treated is directly placed in a space in a closed channel, then hot fluid is directly introduced, the hot fluid is discharged after treatment is finished, and in the treatment process, the temperature of the fluid can be controlled by using a temperature controller so as to meet the requirements of different workpiece treatment temperatures.
The invention content is as follows:
in order to solve the problems in the prior art, the application provides a high-precision hot air type surface heat treatment control system. The problems of difficult surface treatment of complex workpieces and low control precision are solved, and meanwhile, the temperature fields with different temperature areas and uniform flow velocity are effectively formed near the surfaces of the workpieces to be treated by controlling the flow rate and matching the opening degree of the air door, so that the surface heat treatment needs of the complex workpieces or multi-surface workpieces are conveniently realized.
Specifically, a high-precision hot air type surface heat treatment control system comprises a control unit 16, a hot fluid forming unit 10, a hot fluid distribution unit 11, a valve control system 18, and a heat treatment chamber 3, wherein the heat treatment chamber 3 has a main heating fluid inlet 1 and a hot fluid outlet 13, the hot fluid forming unit 10 is connected with the main heating fluid inlet 1 through the hot fluid distribution unit 11, and the high-precision hot air type surface heat treatment control system is characterized in that: the thermal fluid distribution unit 11 comprises a plurality of movable injection devices 6 at the tail end of the thermal fluid distribution unit, a plurality of movable injection devices 6 are arranged, an auxiliary temperature adjusting device 7 is arranged in front of an outlet of each movable injection device 6, the movable injection devices 6 are arranged on the wall surface in front of the processing area 2 of the thermal processing chamber, the thermal imaging device 5 and the temperature field correcting component 8 are further included, the thermal fluid in the processing area 2 of the thermal processing chamber 3 is corrected in advance according to the thermal imaging device 5 and the temperature field correcting component 8, then the temperature field correcting component 8 is retracted, the workpiece to be processed is fixedly arranged in the processing area 2, the surface of the workpiece to be processed is arranged opposite to the fluid flowing direction of the thermal processing chamber 3, the heat exchanger 9 is arranged at the thermal fluid outlet 13, and the heat of the thermal fluid is recovered, used for producing domestic hot water.
The control unit is electrically connected with the control system, the thermal fluid distribution unit, the thermal imaging device and the alarm unit respectively.
Further, the hot fluid forming unit includes a plurality of hot fluid forming members, which may be, alternatively, a hot blast stove, a steam generator, etc., and a domestic hot water supply pipe 15 and a return pipe 14 are provided at the heat exchanger 9.
Further, the hot fluid forming unit 10 is connected to the hot fluid distributing unit 11 through a pipeline and then connected to the auxiliary temperature adjusting device 7, and the hot blast stove is connected to a plurality of hot fluid distributing units respectively, or the steam generator is connected to a plurality of hot fluid distributing units respectively, or the hot blast stove and the steam generator are combined to be connected to each hot fluid distributing unit respectively, so that hot fluids with different temperatures can be contained in each hot fluid distributing unit.
Further, the auxiliary temperature adjusting device 7 is connected to the control unit 16, the control unit 16 obtains the temperature distribution of hot air in the current thermal processing chamber by comparing the temperature field image obtained by the thermal imaging device 5 in the temperature field correction assembly 8 with a preset standard temperature field image, when the current temperature field distribution is different from the standard temperature field distribution, the control unit 16 sends an adjusting signal to adjust the angle of the movable injection device 6, and performs flow adjustment by using the flow control device 12 of the valve control system 18, the auxiliary temperature adjusting device 7 performs temperature adjustment, and performs supplementary hot fluid injection on the surface of the workpiece in the processing region on the wall surface of the processing region of the thermal processing chamber, so that the temperature of each region of the surface of the workpiece tends to a required range, it can be understood that the hot fluid forming unit 10 supplies hot fluid required for thermal processing of the surface of the workpiece, in order to save energy, the heating temperature of the hot fluid forming unit 10 only needs to meet the lowest temperature of the workpiece surface heat treatment, and when the workpiece surface needs higher temperature of a certain region, according to the size of the higher temperature region, the control unit 16 controls the auxiliary temperature adjusting device 7 to heat, wherein the heating mode is resistance type electric heating, and the angles of a plurality of movable spraying devices are adjusted, the flow control device 12 is used for flow adjustment, auxiliary heating hot fluid with corresponding flow is sprayed out, so that temperature fields of different temperature regions are formed on the workpiece surface, and the requirements of the surface heat treatment are met.
Further, prior to performing workpiece processing, the temperature field at the processing region is pre-adjusted by: the temperature field correction component 8 is unfolded, specifically, the temperature field correction component is set to be a rollable screen which corresponds to the position where the workpiece needs to be placed, the rollable screen is in a form of densely distributed air holes, hot air blows through the screen, the temperature of the screen approaches the hot air temperature field distribution of the cross section where the screen is located, and at the moment, the thermal imaging device 5 obtains the temperature field distribution condition of the screen and compares the temperature field distribution condition with a preset standard temperature field picture; further distinguished, the temperature field is adjusted through the control unit 16, and after the temperature field is adjusted, the screen is retracted through the motor, and the workpiece is installed and positioned; the heat treatment can then be started.
Further, a door sill 4 for uniformly heating air is arranged in front of the processing area, the door sill 4 is a sliding door with an adjustable opening, a displacement sensor is arranged for detecting the opening position of the door, an air speed sensor is arranged at the sliding door, the valve control system 18 is controlled by calculation to proportionally control the flow of the hot fluid, and the surface air speed at the opening of the sliding door is kept at 0.4-0.8M/S, so that the stability of a temperature field is better maintained, the heat treatment on the surface of the workpiece is more accurately completed, the thermal imaging device 5 is arranged on the wall surface at the rear side of the door sill 4, and the thermal imaging device 5 is positioned in a retention area of air flow, so that the direct blowing of the hot air is avoided, the service life of the thermal imaging device 5 is prolonged, and the detection error is greatly reduced.
The hot fluid distribution unit 11 obtains the hot fluid from the hot fluid forming unit 10 and distributes the hot fluid, wherein one path of the hot fluid is communicated with the main heating fluid inlet 1, the other two paths of the hot fluid are respectively connected with one auxiliary temperature adjusting device 7, three paths of pipelines led out from the hot fluid distribution unit 11 are respectively provided with a flow control device 12, and an outlet of the auxiliary temperature adjusting device 7 is connected with the movable injection device 6.
Further, the temperature in the heat treatment chamber is detected in real time, the timing is started when the temperature in the heat treatment chamber is over-temperature or under the low-temperature condition, the alarm is given out when the temperature is over-temperature or under the over-temperature condition, the workpiece is prevented from being damaged due to over-high temperature, and only the alarm is given out under the low-temperature condition, and the alarm form can be information or acousto-optic alarm to prompt technicians to overhaul.
Through above-mentioned technical scheme, it is poor that this application has overcome prior art heat treatment temperature control accuracy, can't include the regional problem of multiple temperature, provides convenient, accurate processing scheme to the surface heat treatment of complicated work piece or multiaspect material work piece, and the bulk temperature of heating fluid maintains at lower level, practices thrift the energy consumption, retrieves the heat of hot-fluid simultaneously, has reduced the heat loss, has very big economic benefits.
Description of the drawings:
FIG. 1 is a schematic view of a thermal processing chamber
FIG. 2 is a schematic diagram of a control system
FIG. 3 is a schematic diagram of a hot fluid supply structure in the coexistence of multiple hot fluids
FIG. 4 is a schematic diagram comparing temperature fields
FIG. 5 is a schematic view of a high-precision hot-air type surface heat treatment control system
The specific implementation mode is as follows:
it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a high-precision hot-blast surface heat treatment control system comprises a control unit 16, a hot fluid forming unit 10, a hot fluid distribution unit 11, a valve control system 18, and a heat treatment chamber 3, wherein the heat treatment chamber 3 has a main heating fluid inlet 1 and a hot fluid outlet 13, the hot fluid forming unit 10 is connected to the main heating fluid inlet 1 through the hot fluid distribution unit 11, the system further comprises a flow control device 12, the hot fluid distribution unit 11 comprises a plurality of movable injection devices 6 at the tail end of the hot fluid distribution unit, each movable injection device 6 has an auxiliary temperature adjusting device 7 in front of the outlet, the movable injection devices 6 are arranged on the wall surface in front of a treatment area 2 of the heat treatment chamber, and the system further comprises a thermal imaging device 5 and a temperature field correction component 8, the thermal imaging device 5 and the temperature field correction component 8 are used for correcting the thermal fluid in the treatment area 2 of the thermal treatment chamber 3 in advance, then the temperature field correction component 8 is retracted, the workpiece to be treated is fixedly arranged in the treatment area 2, the surface of the workpiece to be treated is arranged opposite to the flow direction of the fluid in the thermal treatment chamber 3, and the heat exchanger 9 is arranged at the thermal fluid outlet 13 and used for recovering the heat of the thermal fluid and generating domestic hot water.
As shown in fig. 2, the control unit 16 is electrically connected to the control system 18, the thermal fluid distribution unit 11, the thermal imaging device 5, and the alarm unit 17.
Further, the hot fluid forming unit includes a plurality of hot fluid forming members, which may be, alternatively, a hot blast stove, a steam generator, etc., and a domestic hot water supply pipe 15 and a return pipe 14 are provided at the heat exchanger 9. As shown in fig. 3, the hot fluid forming unit has two hot air furnaces, and the other hot fluid forming unit is a steam generator, and can supply hot fluid with different temperatures.
Further, the hot fluid forming unit 10 is connected to the hot fluid distributing unit 11 through a pipeline and then connected to the auxiliary temperature adjusting device 7, and the hot blast stove is respectively connected to a plurality of hot fluid distributing units 11, or the steam generator is respectively connected to a plurality of hot fluid distributing units 11, or the hot blast stove and the steam generator are combined to be respectively connected to each hot fluid distributing unit 11, so that hot fluids with different temperatures can be provided in each hot fluid distributing unit 11.
Further, as shown in fig. 5, the hot fluid distribution unit 11 obtains the hot fluid from the hot fluid forming unit 10 and distributes the hot fluid, wherein one path of the hot fluid is communicated with the main heating fluid inlet 1, the other two paths of the hot fluid are respectively connected with one auxiliary temperature adjusting device 7, flow control devices 12 are respectively arranged on three paths of pipelines led out from the hot fluid distribution unit 11, and outlets of the auxiliary temperature adjusting devices 7 are connected with the movable injection devices 6.
Further, the auxiliary temperature adjusting device 7 is connected to the control unit 16, the control unit 16 obtains the temperature distribution of hot air in the current heat treatment chamber by comparing the temperature field image obtained by the thermal imaging device 5 in the temperature field correction assembly 8 with a preset standard temperature field image, when the current temperature field distribution is different from the standard temperature field distribution, referring to fig. 4 specifically, when the detected temperature of the A, B, C, D area is not consistent with the required temperature of the preset a ', B', C ', D', the control unit 16 sends an adjusting signal to adjust the angle of the movable injection device 6, and performs flow adjustment by using the valve control system 18, the auxiliary temperature adjusting device 7 performs temperature adjustment, and performs supplementary hot fluid injection to the surface of the workpiece in the processing area on the wall surface of the processing area of the heat treatment chamber, the temperature of each area of the surface of the workpiece tends to a required range, it can be understood that the hot fluid forming unit 10 supplies hot fluid required by the surface heat treatment of the workpiece, in order to save energy, the temperature heated by the hot fluid forming unit 10 only needs to meet the lowest temperature of the surface heat treatment of the workpiece, and when the surface of the workpiece needs higher temperature of individual areas, according to the size of the higher temperature area, the control unit 16 controls the auxiliary temperature adjusting device 7 to heat, wherein the heating mode is resistance type electric heating, and the angles of the plurality of movable spraying devices are adjusted, the flow control device 12 is used for flow adjustment, and auxiliary heating hot fluid with corresponding flow is sprayed out, so that temperature fields of different temperature areas are formed on the surface of the workpiece, and the requirement of the surface heat treatment is met.
Further, prior to performing workpiece processing, the temperature field at the processing region is pre-adjusted by: the temperature field correction component 8 is unfolded, specifically, the temperature field correction component is set to be a rollable screen which corresponds to the position where the workpiece needs to be placed, the rollable screen is in a form of densely distributed air holes, hot air blows through the screen, the temperature of the screen approaches the hot air temperature field distribution of the cross section where the screen is located, and at the moment, the thermal imaging device 5 obtains the temperature field distribution condition of the screen and compares the temperature field distribution condition with a preset standard temperature field picture; further distinguished, the temperature field is adjusted through the control unit 16, and after the temperature field is adjusted, the screen is retracted through the motor, and the workpiece is installed and positioned; the heat treatment can then be started.
Further, a door sill 4 for uniformly heating air is arranged in front of the processing area, the door sill 4 is a sliding door with an adjustable opening, a displacement sensor is arranged for detecting the opening position of the door, an air speed sensor is arranged at the sliding door, the valve control system 18 is controlled by calculation to proportionally control the flow of the hot fluid, and the surface air speed at the opening of the sliding door is kept at 0.4-0.8M/S, so that the stability of a temperature field is better maintained, the heat treatment on the surface of the workpiece is more accurately completed, the thermal imaging device 5 is arranged on the wall surface at the rear side of the door sill 4, and the thermal imaging device 5 is positioned in a retention area of air flow, so that the direct blowing of the hot air is avoided, the service life of the thermal imaging device 5 is prolonged, and the detection error is greatly reduced.
Further, the temperature in the heat treatment chamber is detected in real time, the timing is started when the temperature in the heat treatment chamber is over-temperature or under the low-temperature condition, the alarm is given out when the temperature is over-temperature or under the over-temperature condition, the workpiece is prevented from being damaged due to over-high temperature, and only the alarm is given out under the low-temperature condition, and the alarm form can be information or acousto-optic alarm to prompt technicians to overhaul.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A high-precision hot-blast surface heat treatment control system comprising a control unit (16), a hot fluid forming unit (10), a hot fluid dispensing unit (11), a valve control system (18), a heat treatment chamber (3), said heat treatment chamber (3) having a main heating fluid inlet (1) and a hot fluid discharge (13), said hot fluid forming unit (10) being connected to said main heating fluid inlet (1) through said hot fluid dispensing unit (11), characterized in that: the device comprises a thermal treatment chamber, and is characterized by further comprising an auxiliary thermal fluid device flow control device (12), wherein the thermal fluid distribution unit (11) comprises a plurality of movable injection devices (6) which are positioned at the tail ends of the thermal fluid distribution unit, each movable injection device (6) is provided with an auxiliary temperature adjusting device (7) in front of an outlet, each movable injection device (6) is arranged on the wall surface in front of the treatment area (2) of the thermal treatment chamber, the device also comprises a thermal imaging device (5) and a temperature field correction component (8), the thermal fluid at the treatment area (2) of the thermal treatment chamber (3) is corrected in advance according to the thermal imaging device (5) and the temperature field correction component (8), then the temperature field correction component (8) is retracted, a workpiece to be treated is fixedly arranged in the treatment area (2), and the surface of the workpiece to be treated is arranged opposite to the fluid flow direction of the thermal treatment chamber (3), and a heat exchanger (9) is arranged at the hot fluid outlet (13) and used for recovering the heat of the hot fluid and generating domestic hot water.
2. A further high precision hot air type surface heat treatment control system according to claim 1, wherein: the hot fluid forming unit comprises a plurality of hot fluid forming components including a hot blast stove or a steam generator, and a domestic hot water supply pipe (15) and a water return pipe (14) are arranged at the heat exchanger (9).
3. A further high precision hot air type surface heat treatment control system according to claim 1, wherein: the hot fluid forming unit (10) is connected to the hot fluid dispensing unit (11) by a pipe and then to an auxiliary thermostat (7).
4. A further high precision hot air type surface heat treatment control system according to claim 1, wherein: the auxiliary temperature adjusting device (7) is connected to the control unit (16), the control unit (16) obtains the temperature field image in the temperature field correction component (8) according to the thermal imaging device (5), comparing with preset standard temperature field picture to obtain the temperature distribution of hot air in the current heat treatment chamber, when the current temperature field distribution is different from the standard temperature field distribution, the control unit (16) sends out an adjusting signal to enable the movable injection device (6) to carry out angle adjustment, and the flow control device (12) of the auxiliary hot fluid device of the valve control system (18) is used for carrying out flow regulation, the auxiliary temperature regulation device (7) is used for carrying out temperature regulation, and supplementary hot fluid injection is carried out on the surface of the workpiece in the processing area from the wall surface of the processing area of the heat treatment chamber, so that the temperature of each area of the surface of the workpiece tends to the required range.
5. A further high precision hot air type surface heat treatment control system according to claim 4, wherein: the hot fluid forming unit (10) supplies hot fluid required by the surface heat treatment of the workpiece, the heating temperature of the hot fluid forming unit (10) meets the minimum temperature of the surface heat treatment of the workpiece, and when the surface of the workpiece needs higher temperature of individual areas, the control unit (16) controls the auxiliary temperature adjusting device (7) to heat according to the size of the higher temperature areas, wherein the heating mode is resistance type electric heating, so that temperature fields of different temperature areas are formed on the surface of the workpiece.
6. A further high precision hot air type surface heat treatment control system according to claim 1, wherein: prior to workpiece processing, pre-conditioning a temperature field at the processing region by: the temperature field correction component (8) is unfolded and is set to be a rollable screen, the position of the screen corresponds to the position where the workpiece needs to be placed, the rollable screen is in a form of densely distributed air holes, hot air blows through the screen, the temperature of the screen approaches the hot air temperature field distribution of the cross section where the screen is located, and at the moment, the thermal imaging device (5) obtains the temperature field distribution condition of the screen and compares the temperature field distribution condition with a preset standard temperature field picture; further, the temperature field is adjusted by the control unit (16), and after the temperature field is adjusted, the screen is retracted by the motor, and the workpiece is mounted and positioned to start the heat treatment.
7. A further high precision hot air type surface heat treatment control system according to claim 1, wherein: a door sill (4) for uniform hot air is arranged in front of the treatment area, the door sill (4) is a sliding door with adjustable opening, a displacement sensor is arranged and used for detecting the opening position of the door, an air speed sensor is arranged and arranged at the sliding door, the valve control system (18) is controlled through calculation to carry out proportional control on the flow of hot fluid, and the surface air speed near the opening of the sliding door is kept at 0.4-0.8M/S.
8. A further high precision hot air type surface heat treatment control system according to claim 7, wherein: the thermal imaging device (5) is arranged on the wall surface behind the door sill (4), and the thermal imaging device (5) is located in a stagnation area of air flow.
9. A further high precision hot air type surface heat treatment control system according to claim 1, wherein: still included alarm unit (17), the temperature in the real-time detection thermal treatment chamber, when the super-temperature or microthermal condition appear, started the timing, last the time of exceeding the default time as above-mentioned condition, reported to the police to automatic shutdown under the super-temperature condition avoids the high temperature to damage the work piece, and under microthermal condition, only reports to the police, and the alarm form is information or audible and visual alarm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010303731.9A CN111471841B (en) | 2020-04-17 | 2020-04-17 | High-precision hot air type surface heat treatment control system |
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| CN202010303731.9A CN111471841B (en) | 2020-04-17 | 2020-04-17 | High-precision hot air type surface heat treatment control system |
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| CN112026192A (en) * | 2020-08-25 | 2020-12-04 | 广东东方广厦模块化建筑有限公司 | Composite board forming production line |
| CN113503974A (en) * | 2021-09-09 | 2021-10-15 | 江苏沃泰冶金设备有限公司 | Thermal imaging detection system and method based on PID and gas ash conveying device |
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| CN111471841B (en) | 2021-12-03 |
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