CN113340556B - Global overtemperature monitoring and temperature control auxiliary system for plate heater - Google Patents
Global overtemperature monitoring and temperature control auxiliary system for plate heater Download PDFInfo
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- CN113340556B CN113340556B CN202011595087.3A CN202011595087A CN113340556B CN 113340556 B CN113340556 B CN 113340556B CN 202011595087 A CN202011595087 A CN 202011595087A CN 113340556 B CN113340556 B CN 113340556B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 92
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 20
- 238000002485 combustion reaction Methods 0.000 claims description 27
- 238000007664 blowing Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000011144 upstream manufacturing Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/0205—Mechanical elements; Supports for optical elements
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/27—Control of temperature characterised by the use of electric means with sensing element responsive to radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Fluid Mechanics (AREA)
- Radiation Pyrometers (AREA)
Abstract
The invention relates to a global overtemperature monitoring and temperature control auxiliary system of a plate heater, which comprises an infrared global temperature measuring unit, an overtemperature control unit and a cooling unit, wherein the infrared global temperature measuring unit adopts infrared camera shooting to carry out temperature measurement on the global heater; the overtemperature control unit recognizes temperature acquisition data and carries out overtemperature alarm to realize auxiliary control of the operation of the heater; the cooling unit is connected with an original air source of the wind tunnel, and the cooling ring and the cooling nozzle realize the air flow on the surface of the heater shell, so as to realize the cooling of the heater shell; the infrared global temperature measurement unit comprises an infrared camera, a portal frame, a driver, a movable sliding rail and a real-time temperature measurer, wherein the portal frame is arranged on the movable sliding rail, and the driver drives the portal frame to slide along the movable sliding rail. The invention can carry out real-time temperature measurement on the whole heater, so that the safe use of the heater is ensured.
Description
Technical Field
The invention relates to a global overtemperature monitoring and temperature control auxiliary system for a plate heater, and belongs to the technical field of wind tunnel tests.
Background
The wind tunnel plate regenerative heater is a device which works in a high-temperature and high-pressure environment, and the internal maximum temperature is about 800 ℃. The normal case heater shell comprises a front barrel and a rear barrel which are horizontally arranged, flanges are arranged at two ends of the barrel, the barrel and the flanges are formed by machining an integral forging piece, and the flanges and the barrel are welded together by adopting U-shaped groove submerged arc automatic butt welding. The manufacturing process of the heater ensures that the connected circular seam, the heat insulation of the combustion chamber of the heater and the connecting seam at the front and back are all a plurality of dangerous points with risk of strength after being heated.
Because wind tunnels are frequently used, the utilization rate of the heater is high, and the heater belongs to recycling equipment, the consumption is about 6000 hours per year. The most important part of the heater is the combustion chamber, where the internal temperature is the highest, a component of great concern. Because the heater belongs to early design, no overtemperature detection device exists, the temperature measurement is mainly carried out by manually measuring the local point temperature of the shell, the non-real-time measurement is carried out, the human error is large, and the uncertainty is large.
When the heater is overhauled for many times, the welding part of the inner part of the combustion chamber of the heater is broken in a high-temperature state for a long time, the service life of the heat-preserving lining is longer, and the local overtemperature is caused by falling of the local heat-preserving layer, so that the heater is not easy to detect in another part.
Disclosure of Invention
The invention solves the technical problems that: the defect of the prior art is overcome, a global overtemperature monitoring and temperature control auxiliary system for a plate heater is provided, the hidden danger of operation of the heater is solved, and the safe and orderly performance of wind tunnel tests is ensured.
The solution of the invention is as follows:
the global overtemperature monitoring and temperature control auxiliary system of the plate heater comprises an infrared global temperature measuring unit, an overtemperature control unit and a cooling unit,
the infrared global temperature measurement unit adopts infrared camera shooting to carry out global temperature measurement on the heater;
the overtemperature control unit recognizes temperature acquisition data and carries out overtemperature alarm to realize auxiliary control of the operation of the heater;
the cooling unit is connected with an original air source of the wind tunnel, and the cooling ring and the cooling nozzle realize the air flow on the surface of the heater shell, so as to realize the cooling of the heater shell;
the infrared global temperature measuring unit comprises an infrared camera, a portal frame, a driver, a movable slide rail and a real-time temperature measuring device,
the portal frame is arranged on the movable slide rail, and is driven by the driver to slide along the movable slide rail;
the infrared cameras are uniformly distributed on the portal frame, the plate heater is arranged below the portal frame, the temperature measurement of the plate heater shell in the whole 360 DEG can be realized, if the measured value is larger than the warning value, the plate heater shell at the position where the measured value is larger than the warning value is cooled by the cooling unit, and if the measured value is still larger than the warning value within 6-15min, the heating of the inside of the plate heater is stopped;
the overtemperature control unit is used for monitoring whether the temperature exceeds the standard and controlling the air blowing of the cooling unit and the heating of the heater;
the cooling unit comprises a cooling blowing nozzle, a downstream cooling blowing ring, an upstream cooling blowing ring, a combustion chamber cooling blowing ring, an electromagnetic valve and an air source pipeline,
the downstream cooling ring, the upstream cooling ring and the combustion chamber cooling ring are all connected with an air source pipeline, cooling nozzles are uniformly distributed on the cooling ring to form a cooling air field along the outer wall surface of the heater, air in the air source pipeline is sprayed out through the cooling ring and finally is sprayed out by the cooling nozzles, and the sprayed air acts on the plate type heater shell to cool the plate type heater shell at the position where the measured value is larger than the warning value.
Further, the refresh rate of the infrared camera is not more than 1 second, and the temperature resolution is not more than 1 ℃.
Further, the plate-type heater comprises a combustion chamber and a heat accumulator, and the combustion chamber is connected with the heat accumulator; the regenerator includes an upstream section and a downstream section, the upstream section being proximate to the combustion chamber.
Further, the nozzle forms an included angle of 40-50 degrees with the axis of the shell, and the air is focused on one point on the axis to form an annular cooling air field.
Further, the air source pipeline is connected with a medium-pressure air source pipeline of the wind tunnel, and the provided pressure is not less than 1 megapascal.
Further, the cooling rings are respectively positioned at the front, middle and rear parts of the heater main body and respectively correspond to the combustion chamber, the front section of the shell and the rear section of the shell.
Further, the electromagnetic valve is controlled by the overtemperature control unit, and can independently open the cold-blowing rings at different positions for air supply.
Further, the cooling unit is connected with the medium-pressure air tank to obtain a stable pressure air source, and the sectional air supply is provided by the cooling ring which is respectively arranged at the positions of the combustion chamber of the heater, the front section of the shell and the rear section of the shell.
Further, the cooling unit is controlled by the overtemperature control unit to send out instructions to the electromagnetic valves, and the corresponding electromagnetic valves are controlled to be opened according to different overtemperature positions, so that air can be respectively supplied to the downstream cooling ring, the upstream cooling ring and the cooling ring of the combustion chamber, and then the air is sprayed out by the cooling spray nozzle.
Further, the overtemperature control unit controls the driver to drive the portal frame to axially move along the track.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, the infrared cameras are uniformly distributed in the circumferential direction of the heater and are arranged on the portal frame, so that the temperature of the 360-degree structure of the heater can be measured in real time, the heating process is adjusted in real time, and the limitation of measuring the original sensor points is avoided;
(2) In order to save the installation space of the camera, the invention adopts the installation mode of combining the sliding rail with the portal frame to longitudinally scan the temperature of the heater, thereby avoiding the problems of overlarge view field and inaccurate local temperature;
(3) The invention can carry out real-time measurement on the temperature below 1000 ℃, the temperature measurement is displayed in real time, the refresh rate is 1 second, and the temperature resolution is 1 degree centigrade;
(4) The invention can carry out real-time temperature measurement on the whole of the heater, ensures the safe use of the heater, can control the overheat and the heating, realizes the overheat control and the heating operation by adopting an automatic method, and can finish the sectional cooling of the heater by a cooling system.
Drawings
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a schematic diagram of an infrared global temperature measurement unit according to the present invention;
FIG. 3 is a flow chart of an over-temperature control strategy of the present invention;
FIG. 4 is a schematic diagram of a cooling unit according to the present invention.
Detailed Description
The invention is further illustrated below with reference to examples.
The global overtemperature monitoring and temperature control auxiliary system of the plate heater comprises an infrared global temperature measuring unit 101, an overtemperature control unit 102 and a cooling unit 103 as shown in figure 1,
the infrared global temperature measurement unit 101 adopts infrared camera shooting to perform temperature measurement on the heater global;
the overtemperature control unit 102 recognizes temperature acquisition data and carries out overtemperature alarm to realize auxiliary control of the operation of the heater;
the cooling unit 103 is connected with an original air source of the wind tunnel, and the cooling ring and the cooling nozzle realize the air flow on the surface of the heater shell, so as to realize the cooling of the heater shell;
as shown in fig. 2, the infrared global temperature measurement unit 101 includes an infrared camera 201, a gantry 202, a driver 203, a moving slide 204 and a real-time temperature detector 205,
the portal frame 202 is arranged on the movable slide rail 204, and the portal frame 202 is driven to slide along the movable slide rail 204 by the driver 203;
the infrared cameras 201 are uniformly distributed on the portal frame, the plate heater 104 is arranged below the portal frame, so that the temperature measurement of the plate heater shell in the whole 360 degrees can be realized, if the measured value is larger than the warning value, the plate heater shell at the position where the measured value is larger than the warning value is cooled by the cooling unit 103, and if the measured value is still larger than the warning value within 6-15min, the heating inside the plate heater is stopped;
the overtemperature control unit 102 is used for monitoring whether the temperature exceeds the standard and controlling the air blowing of the cooling unit and the heating of the heater;
as shown in fig. 4, the cooling unit 103 includes a cool air blowing nozzle 301, a downstream cool air blowing ring 302, an upstream cool air blowing ring 303, a combustion chamber cool air blowing ring 304, a solenoid valve 305 and a gas supply line 306,
the downstream cooling ring 302, the upstream cooling ring 303 and the combustion chamber cooling ring 304 are all connected with an air source pipeline 306, cooling nozzles 301 are uniformly distributed on the cooling ring to form a cooling air field along the outer wall surface of the heater, air in the air source pipeline 306 is finally sprayed out by the cooling nozzles through the cooling ring, and the sprayed air acts on the plate type heater shell to cool the plate type heater shell where the measured value is larger than the warning value.
The refresh rate of the infrared camera 201 is not more than 1 second, and the temperature resolution is not more than 1 ℃. The plate-type heater comprises a combustion chamber and a heat accumulator, and the combustion chamber is connected with the heat accumulator; the regenerator includes an upstream section and a downstream section, the upstream section being proximate to the combustion chamber.
The nozzle forms an included angle of 40-50 degrees with the axis of the shell, and the air is focused on one point on the axis to form an annular cooling wind field.
The air supply pipeline 306 is connected with a medium-pressure air supply pipeline of the wind tunnel and provides a pressure not less than 1 megapascal.
The cooling ring is located at the front, middle and rear parts of the heater main body respectively and corresponds to the combustion chamber, the front section of the shell and the rear section of the shell respectively.
The electromagnetic valve 305 is controlled by an overtemperature control unit and can independently open the cold-blowing rings at different positions for air supply.
The cooling unit 103 is connected with a medium-pressure gas tank to obtain a stable pressure gas source, and the sectional gas supply is provided by a cooling ring respectively arranged at the positions of the combustion chamber of the heater, the front section of the shell and the rear section of the shell.
The control of the cooling unit is performed by the command sent by the overtemperature control unit 102 to the electromagnetic valve 305, and the corresponding electromagnetic valve 305 is controlled to be opened according to different overtemperature positions, so that air can be respectively supplied to the downstream cooling ring 302, the upstream cooling ring 303 and the combustion chamber cooling ring 304, and then the air is sprayed out by the cooling nozzle 301.
The overtemperature control unit 102 controls the driver 203 to drive the gantry to axially move along the track.
The evaluation and decision steps of the overtemperature control unit 102 for the heater operation are shown in fig. 3:
step 1, heating by a heater, and when the internal temperature of the heater reaches a specified temperature, starting to monitor the overall temperature by an auxiliary system;
step 2, dynamically monitoring the temperature of the heater shell in real time;
step 3, judging the overtemperature, and if the temperature of the shell does not exceed the safe temperature, continuing heating; if the temperature of the shell exceeds the safe temperature, heating is stopped, overtemperature alarm is given, and the cooling unit 103 is started;
step 4, dynamically monitoring the shell after the cooling unit is started in real time;
and 5, judging the overtemperature, if the temperature of the shell is lower than the safe temperature, continuing heating, and if the temperature of the shell is over the safe temperature again, alarming the overtemperature, stopping heating and recommending maintenance.
The operation auxiliary system is used as an independent device, improves the structure and the operation program of the original wind tunnel heater, effectively solves the problem of overheat monitoring of the combustion chamber of the heater, particularly can solve the problem of random overheat Wen Dianwei judgment caused by falling of the heat-insulating material in the heater, and can effectively ensure the safe and orderly operation of wind tunnel equipment.
According to the invention, the infrared cameras are uniformly distributed in the circumferential direction of the heater and are arranged on the portal frame, so that the temperature of the 360-degree structure of the heater can be measured in real time, the heating process is adjusted in real time, and the limitation of measuring the original sensor points is avoided;
in order to save the installation space of the camera, the invention adopts the installation mode of combining the sliding rail with the portal frame to longitudinally scan the temperature of the heater, thereby avoiding the problems of overlarge view field and inaccurate local temperature;
the invention can carry out real-time measurement on the temperature below 1000 ℃, the temperature measurement is displayed in real time, the refresh rate is 1 second, and the temperature resolution is 1 degree centigrade;
the invention can carry out real-time temperature measurement on the whole of the heater, ensures the safe use of the heater, can control the overheat and the heating, realizes the overheat control and the heating operation by adopting an automatic method, and can finish the sectional cooling of the heater by a cooling system.
Although the present invention has been described in terms of the preferred embodiments, it is not intended to be limited to the embodiments, and any person skilled in the art can make any possible variations and modifications to the technical solution of the present invention by using the methods and technical matters disclosed above without departing from the spirit and scope of the present invention, so any simple modifications, equivalent variations and modifications to the embodiments described above according to the technical matters of the present invention are within the scope of the technical matters of the present invention.
Claims (4)
1. The global overtemperature monitoring and temperature control auxiliary system of the plate heater is characterized by comprising an infrared global temperature measuring unit (101), an overtemperature control unit (102) and a cooling unit (103),
an infrared global temperature measurement unit (101) adopts infrared shooting to carry out global temperature measurement on the heater;
the overtemperature control unit (102) recognizes temperature acquisition data and carries out overtemperature alarm to realize auxiliary control of the operation of the heater;
the cooling unit (103) is connected with an original air source of the wind tunnel, and the cooling ring and the cooling nozzle realize the air flow on the surface of the heater shell, so as to realize the cooling of the heater shell;
the infrared global temperature measurement unit (101) comprises an infrared camera (201), a portal frame (202), a driver (203), a movable slide rail (204) and a real-time temperature measurer (205),
the portal frame (202) is arranged on the movable slide rail (204), and the driver (203) drives the portal frame (202) to slide along the movable slide rail (204);
the infrared cameras (201) are uniformly distributed on the portal frame, the plate heater (104) is arranged below the portal frame, so that the temperature measurement of the plate heater shell in a 360-degree overall mode can be realized, if the measured value is larger than the warning value, the plate heater shell at the position where the measured value is larger than the warning value is cooled by the cooling unit (103), and if the measured value is still larger than the warning value within 6-15min, the heating inside the plate heater is stopped;
the overtemperature control unit (102) is used for monitoring whether the temperature exceeds the standard and controlling the cooling unit to blow and the heater to heat;
the cooling unit (103) comprises a cold blowing nozzle (301), a downstream cold blowing ring (302), an upstream cold blowing ring (303), a combustion chamber cold blowing ring (304), an electromagnetic valve (305) and a gas source pipeline (306),
the downstream cooling ring (302), the upstream cooling ring (303) and the combustion chamber cooling ring (304) are all connected with an air source pipeline (306), cooling nozzles (301) are uniformly distributed on the cooling ring to form a cooling air field along the outer wall surface of the heater, air in the air source pipeline (306) is sprayed out through the cooling ring and finally is sprayed out by the cooling nozzles, and the sprayed air acts on the plate type heater shell to cool the plate type heater shell where the measured value is larger than the warning value;
the plate-type heater comprises a combustion chamber and a heat accumulator, and the combustion chamber is connected with the heat accumulator; the regenerator comprises an upstream section and a downstream section, the upstream section being proximate to the combustion chamber;
the cooling nozzle forms an included angle of 40-50 degrees with the axis of the shell, and focuses on one point on the axis to jet air to form an annular cooling wind field;
the electromagnetic valve (305) is controlled by the overtemperature control unit, and can independently open the cold-blowing rings at different positions for air supply;
the cooling unit (103) is connected with the medium-pressure air tank to obtain a stable pressure air source, and the cooling unit is used for providing sectional air supply through cooling rings respectively arranged at the positions of the combustion chamber of the heater, the front section of the shell and the rear section of the shell;
the cooling unit is controlled by an instruction sent by the overtemperature control unit (102) to the electromagnetic valve (305), and the corresponding electromagnetic valve (305) is controlled to be opened according to different overtemperature positions, so that air can be respectively supplied to the downstream cooling ring (302), the upstream cooling ring (303) and the combustion chamber cooling ring (304), and then the air is sprayed out by the cooling nozzle (301).
2. A global overtemperature monitoring and temperature control auxiliary system for a plate heater according to claim 1, wherein the refresh rate of the infrared camera (201) is not more than 1 second, and the temperature resolution is not more than 1 ℃.
3. A global overtemperature monitoring and control auxiliary system for a plate heater according to claim 1, wherein the air supply pipeline (306) is connected with a medium pressure air supply pipeline of the wind tunnel, and provides a pressure of not less than 1 mpa.
4. A global overtemperature monitoring and temperature control auxiliary system for a plate heater according to claim 1, wherein the overtemperature control unit (102) controls the driver (203) to drive the gantry to move axially along the moving slide rail.
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| CN202011595087.3A CN113340556B (en) | 2020-12-29 | 2020-12-29 | Global overtemperature monitoring and temperature control auxiliary system for plate heater |
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| CN202011595087.3A CN113340556B (en) | 2020-12-29 | 2020-12-29 | Global overtemperature monitoring and temperature control auxiliary system for plate heater |
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