CN114034403B - Flame temperature measuring device - Google Patents
Flame temperature measuring device Download PDFInfo
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- CN114034403B CN114034403B CN202111235943.9A CN202111235943A CN114034403B CN 114034403 B CN114034403 B CN 114034403B CN 202111235943 A CN202111235943 A CN 202111235943A CN 114034403 B CN114034403 B CN 114034403B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Control Of Combustion (AREA)
Abstract
The present invention provides a flame temperature measuring device, comprising: the device comprises a bracket, a filament thermocouple, an elastic piece, a signal sampler, a first connecting seat, a second connecting seat, a first compensation wire, a second compensation wire, a first ceramic tube and a second ceramic tube; the first connecting seat and the second connecting seat are both rotationally arranged on the support, the first ceramic tube penetrates through the first connecting seat, the second ceramic tube penetrates through the second connecting seat, the first compensation wire penetrates through the first ceramic tube, the second compensation wire penetrates through the second ceramic tube, one end of the first compensation wire is connected to one end of the filament thermocouple, one end of the second compensation wire is connected to the other end of the filament thermocouple, the other ends of the first compensation wire and the second compensation wire are connected to the signal sampler, one end of the elastic piece is connected to the first ceramic tube, and the other end of the elastic piece is connected to the second ceramic tube. The thin wire thermocouple can obviously reduce the influence of contact temperature measurement on the flow field of the small flame, and the thin wire thermocouple is in a tense state by utilizing the tension provided by the elastic piece.
Description
Technical Field
The invention relates to the technical field of temperature measurement, in particular to a flame temperature measurement device.
Background
Temperature is an important parameter in combustion research, characterizes the intensity of combustion chemical reactions, and can help in scientific analysis of basic flames such as hedging flames and related research of coaxial jet flames.
The temperature measurement can be classified into a contact type and a non-contact type according to whether or not the object to be measured is contacted. Although the contact temperature measurement method can destroy the flow field environment in combustion research, the temperature information of the position of the measurement point can be directly obtained, the measurement result is very close to the real result, and the reliability is high. In contrast, the non-contact temperature measurement method (such as laser diagnosis method) can avoid damaging the experimental flow field during temperature measurement, but the result is still to perform corresponding detection and calibration through contact temperature measurement, otherwise, larger deviation is easy to occur. Thus, it appears that there is still a need to develop a method of contact thermometry.
Disclosure of Invention
The invention provides a flame temperature measuring device which is used for solving the problem that the accuracy of contact temperature measurement is difficult to meet the test requirement in the prior art.
The present invention provides a flame temperature measuring device, comprising: the device comprises a bracket, a filament thermocouple, an elastic piece, a signal sampler, a first connecting seat, a second connecting seat, a first compensation wire, a second compensation wire, a first ceramic tube and a second ceramic tube;
the first connecting seat and the second connecting seat are both rotationally arranged on the support, the first ceramic tube penetrates through the first connecting seat, the second ceramic tube penetrates through the second connecting seat, the first compensation wire penetrates through the first ceramic tube, the second compensation wire penetrates through the second ceramic tube, one end of the first compensation wire is connected to one end of the filament thermocouple, one end of the second compensation wire is connected to the other end of the filament thermocouple, the other end of the first compensation wire and the other end of the second compensation wire are connected to the signal sampler, one end of the elastic piece is connected to the first ceramic tube, and the other end of the elastic piece is connected to the second ceramic tube.
According to the flame temperature measuring device provided by the invention, the flame temperature measuring device further comprises a driving assembly, the driving assembly is connected with the support, and the filament thermocouple is relatively close to or relatively far away from the flame under the driving of the driving assembly.
According to the flame temperature measuring device provided by the invention, the driving assembly comprises an air source, an air cylinder, an electromagnetic valve and a controller;
the electromagnetic valve is arranged between the air source and the air cylinder and comprises an air inlet, a first air outlet and a second air outlet, the air inlet is connected with the air source, the first air outlet and the second air outlet are respectively connected with two air valves of the air cylinder, a piston rod of the air cylinder is connected with the bracket, and the controller is used for controlling the action of the electromagnetic valve.
According to the flame temperature measuring device provided by the invention, the flame temperature measuring device further comprises a machine body, a horizontal moving structure and a vertical moving structure;
the horizontal moving structure is arranged on the machine body and can move along the horizontal direction, the vertical moving structure is arranged on the horizontal moving structure and can move along the vertical direction, and the driving assembly is arranged on the vertical moving structure.
According to the flame temperature measuring device provided by the invention, the flame temperature measuring device further comprises a first driving piece and a second driving piece;
the first driving piece is arranged on the machine body and connected with the horizontal moving structure to drive the horizontal moving structure to move along the horizontal direction;
the second driving piece is arranged on the horizontal moving structure and connected with the vertical moving structure to drive the vertical moving structure to move along the vertical direction.
According to the flame temperature measuring device provided by the invention, the first connecting seat and the second connecting seat have the same structure, the first connecting seat comprises a threaded rod, the bracket is provided with a threaded hole, and the first connecting seat is in threaded connection with the threaded hole through the threaded rod.
According to the flame temperature measuring device provided by the invention, the first connecting seat further comprises an installation seat, the installation seat is connected with the threaded rod, the installation seat is provided with a first installation hole along the radial direction, and the first ceramic tube penetrates through the first installation hole.
According to the flame temperature measuring device provided by the invention, the mounting seat is provided with the second mounting hole along the axial direction, and the second mounting hole is communicated with the first mounting hole; the first connecting seat further comprises a fastener, the fastener is arranged in the second mounting hole, and the fastener is abutted to the surface of the first ceramic tube.
According to the flame temperature measuring device provided by the invention, the first ceramic tube and the second ceramic tube have the same structure, the outer diameter of the first ceramic tube is 2.5-3.5 mm, the inner diameter of the first ceramic tube is 1.5-2.5 mm, and the length of the first ceramic tube is 250-350 mm.
According to the flame temperature measuring device provided by the invention, the diameter of the filament thermocouple is 0.07-0.08 mm, the diameter of the temperature measuring junction is 0.08-0.09 mm, and the temperature measuring limit reaches 1750-1850 ℃.
According to the flame temperature measuring device provided by the invention, the diameter of the filament thermocouple reaches the micron order, and compared with the flame size of a basic combustion experiment, the flame temperature measuring device is very tiny, so that the influence of contact temperature measurement on the flow field of small flame can be obviously reduced; in order to solve the problems that the filament thermocouple is easy to deviate from a measuring position and break due to the impact of a flow field at high temperature, an elastic piece is arranged between the first ceramic tube and the second ceramic tube, and the filament thermocouple is in a tense state by utilizing the tensile force provided by the elastic piece.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a partial schematic view of a flame temperature measuring device provided by the present invention;
FIG. 2 is a schematic structural view of a first connecting seat according to the present invention;
FIG. 3 is a schematic view of a flame temperature measuring device according to the present invention;
reference numerals:
1: a filament thermocouple; 2: a second ceramic tube; 3: a first ceramic tube;
4: a first connection base; 41: a mounting base; 42: a threaded rod;
5: a second connecting seat; 6: a bracket; 7: a first compensation line;
8: a second compensation line; 9: an elastic member; 10: a gas source;
11: a signal sampler; 12: a controller; 13: a valve;
14: an electromagnetic valve; 15: an adjusting device; 16: and (3) a cylinder.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the basic combustion research, small flames such as usual hedging flames and coaxial jet flames are sensitive to the change of the flow field, and even slight disturbance easily causes the corresponding large change of combustion chemical reaction, so that the influence on the flow field of the small flames must be considered when the contact thermocouple temperature measurement method is applied to the small flames. For flames rich in carbon smoke, carbon smoke particles can deposit and adhere to a thermocouple when a contact temperature measurement method is applied, so that the reading of the thermocouple is influenced, and the deviation of the temperature measurement result of the thermocouple is larger, and therefore, the influence of the carbon smoke particles on the temperature measurement result during temperature measurement is also required to be considered. In addition, the high temperature of flame makes temperature thermocouple silk thermal expansion soft tensile, and the fracture is easy under the impact of air current in the flow field, needs to restrict it.
From the above, it is known that the measurement of the temperature of the small flame needs to solve the problems of reducing the influence on the flow field, the adhesion of soot particles in the flame and the easy breakage of the thermocouple wire under the stretching of high temperature.
In order to solve the above-described problems, the flame temperature measuring device of the present invention is described below with reference to fig. 1 to 3.
As shown in fig. 1 and 3, a flame temperature measuring device according to an embodiment of the present application includes: the device comprises a bracket 6, a filament thermocouple 1, an elastic piece 9, a signal sampler 11, a first connecting seat 4, a second connecting seat 5, a first compensation wire 7, a second compensation wire 8, a first ceramic tube 3 and a second ceramic tube 2.
The first connecting seat 4 and the second connecting seat 5 are both rotatably arranged on the same side of the bracket 6, and the first connecting seat 4 and the second connecting seat 5 are arranged at two ends of the bracket 6, that is, the first connecting seat 4 and the second connecting seat 5 can both rotate relative to the bracket 6.
The first ceramic tube 3 is arranged on the first connecting seat 4 in a penetrating way, the second ceramic tube 2 is arranged on the second connecting seat 5 in a penetrating way, that is, the first ceramic tube 3 can rotate relative to the bracket 6 along with the first connecting seat 4, and the second ceramic tube 2 can rotate relative to the bracket 6 along with the second connecting seat 5. For example, the first ceramic tube 3 and the second ceramic tube 2 may be arranged in parallel, or a certain angle may exist between the first ceramic tube 3 and the second ceramic tube 2. The first distance between the first ceramic tube 3 and the support 6 is equal to the second distance between the second ceramic tube 2 and the support 6.
The first compensation wire 7 is arranged in the first ceramic tube 3 in a penetrating way, the second compensation wire 8 is arranged in the second ceramic tube 2 in a penetrating way, the length of the first compensation wire 7 is larger than that of the first ceramic tube 3, and the length of the second compensation wire 8 is larger than that of the second ceramic tube 2.
One end of the first compensation wire 7 is welded to one end of the filament thermocouple 1, one end of the second compensation wire 8 is welded to the other end of the filament thermocouple 1, and two ends of the filament thermocouple 1 are respectively abutted to one end of the first ceramic tube 3 and one end of the second ceramic tube 2 under the action of tensile force provided by the first compensation wire 7 and the second compensation wire 8.
The other end of the first compensation wire 7 and the other end of the second compensation wire 8 are connected to the signal sampler 11, one end of the elastic member 9 is connected to the first ceramic tube 3, and the other end of the elastic member 9 is connected to the second ceramic tube 2.
For example, one end of the elastic member 9 is fixedly connected to the other end of the first ceramic tube 3, and the other end of the elastic member 9 is fixedly connected to the other end of the second ceramic tube 2.
The elastic member 9 may be a spring, or other member having a telescopic capability, and the specific type thereof is not particularly limited herein.
When the temperature is measured in the high-temperature flame, after the filament thermocouple 1 is heated and swelled and softened, the force applied by the elastic piece 9 is converted into the tightening force of the filament thermocouple 1 through the ceramic tube and the connecting seat, so that the temperature measuring point of the filament thermocouple 1 cannot be impacted by air flow to shake, and fatigue fracture occurs.
In the embodiment of the application, the diameter of the filament thermocouple 1 reaches the micron level, and the flame size is very tiny relative to the flame size of a basic combustion experiment, so that the influence of contact temperature measurement on the flow field of small flame can be obviously reduced; in order to solve the problems that the filament thermocouple 1 is easy to deviate from a measuring position and break under the impact of a flow field at high temperature, an elastic piece 9 is arranged between the first ceramic tube 3 and the second ceramic tube 2, and the filament thermocouple 1 is in a tense state by utilizing the tensile force provided by the elastic piece 9.
In an alternative embodiment, the flame temperature measuring device further comprises a driving assembly, wherein the driving assembly is connected with the bracket 6, and the filament thermocouple 1 is relatively close to or relatively far away from the flame under the driving of the driving assembly.
Wherein, support 6 can be "T" shape support, and support 6 includes horizontal pole and vertical pole, and horizontal pole is all located in rotation of first connecting seat 4 and second connecting seat 5, and drive assembly is connected with the vertical pole.
It will be appreciated that by the rapid extension of the filament thermocouple 1 into or out of the flame, the time for soot particles on the way to deposit onto the filament thermocouple 1 is reduced, allowing the effect of soot particle deposition to be quantitatively described, while also reducing the risk of the residence time being too long resulting in breakage of the filament thermocouple 1.
After the measurement is finished, residual soot particles attached to the surface of the filament thermocouple 1 can be burned off by using a butane gun, so that the filament thermocouple 1 can be repeatedly used, and the cost can be saved.
In an alternative embodiment, the drive assembly includes a gas source 10, a gas cylinder 16, a solenoid valve 14, and a controller 12.
Wherein the gas source 10 comprises a gas cylinder and nitrogen stored in the gas cylinder. The solenoid valve 14 may be a two-position three-way solenoid valve.
The electromagnetic valve 14 is arranged between the air source 10 and the air cylinder 16, the electromagnetic valve 14 comprises an air inlet, a first air outlet and a second air outlet, the air inlet is connected with the air source 10 through a first pipeline, and the first pipeline is provided with a valve 13. The first air outlet is connected with one valve of the air cylinder 16 through a second pipeline, and the second air outlet is connected with the other valve of the air cylinder 16 through a third pipeline. The piston rod of the cylinder 16 is connected to the vertical rod, and the controller 12 is used for controlling the action of the solenoid valve 14.
Specifically, the controller 12 sends a first control signal to the solenoid valve 14 to control the opening of the air inlet of the solenoid valve and to control the alternate opening of the first air outlet and the second air outlet, wherein when the air inlet and the first air outlet are opened, the piston rod of the air cylinder 16 moves in a first direction, and when the air inlet and the second air outlet are opened, the piston rod of the air cylinder 16 moves in a second direction, and the first direction and the second direction are opposite.
Wherein, the stroke of the air cylinder 16 is 20mm, and the working pressure is 0.8-1.5 MPa.
In an alternative embodiment, the flame temperature measuring device further comprises an adjusting device 15, in particular the adjusting device 15 comprises a body, a horizontally moving structure and a vertically moving structure.
The horizontal moving structure is arranged on the machine body and can move along the horizontal direction, the vertical moving structure is arranged on the horizontal moving structure and can move along the vertical direction, and the driving assembly is arranged on the vertical moving structure.
The cylinder 16 is provided on a vertically moving structure, that is, the cylinder 16 is capable of two-dimensional movement in the X-axis and Y-axis directions.
Specifically, the controller 12 sends a second control signal to the adjustment device 15, and the horizontal moving structure may be moved in the horizontal direction and/or the vertical moving structure may be moved in the vertical direction.
In an alternative embodiment, the flame temperature measuring device further comprises a first drive member and a second drive member.
The first driving piece is arranged on the machine body and connected with the horizontal moving structure to drive the horizontal moving structure to move along the horizontal direction; the second driving piece is arranged on the horizontal moving structure and connected with the vertical moving structure to drive the vertical moving structure to move along the vertical direction.
The first driving member and the second driving member may be stepper motors.
In an alternative embodiment, as shown in fig. 2, the first connection socket 4 and the second connection socket 5 are identical in structure.
The first connector 4 will be described below as an example. The first connecting seat 4 comprises a threaded rod 42, the bracket 6 is provided with a threaded hole, and the first connecting seat 4 is in threaded connection with the threaded hole through the threaded rod 42.
Specifically, an M4 threaded hole is formed at each of two ends of the cross bar, a circular hole is formed at one end of the longitudinal bar, the connecting piece penetrates through the circular hole to connect the longitudinal bar with a piston rod of the cylinder 16, and the threaded bar 42 is processed into an M4 external threaded bar.
The first connecting seat 4 is in threaded connection with the cross rod through a threaded rod, so that the ceramic tube can rotate when the elastic piece applies force, and the force is transmitted to the filament thermocouple 1.
In an alternative embodiment, the first connecting seat 4 further comprises a mounting seat 41, the mounting seat 41 is connected with the top end of the threaded rod 42, the mounting seat 41 is provided with a first mounting hole along the radial direction, and the first ceramic tube 3 is penetrated in the first mounting hole.
Wherein, the first ceramic tube 3 and the first mounting hole can be in interference fit.
In an alternative embodiment, the mounting seat 41 is provided with a second mounting hole in the axial direction, the second mounting hole being in communication with the first mounting hole; the first connecting seat 4 further comprises a fastener, the fastener is arranged in the second mounting hole, and the fastener is abutted with the surface of the first ceramic tube 3.
The fastener may be a screw, and the second mounting hole may be a screw hole, and the first ceramic tube 3 is fixed in the first mounting hole by rotating the fastener with respect to the second mounting hole, so that the first ceramic tube 3 is prevented from shaking.
In an alternative embodiment, the first ceramic tube 3 and the second ceramic tube 2 have the same structure, and the first ceramic tube 3 is exemplified below by the first ceramic tube 3 having an outer diameter of 2.5 to 3.5mm, an inner diameter of 1.5 to 2.5mm, and a length of 250 to 350mm.
For example, the first ceramic tube 3 has an outer diameter of 3mm, an inner diameter of 2mm, and a length of 300mm.
The first ceramic tube 3 may be a corundum tube, which is suitable for analysis and melting of various laboratory metal and nonmetal samples. The corundum tube has the characteristics of high density, good thermal shock resistance, acid and alkali resistance, scouring resistance, long service life and the like, and the service temperature of the corundum tube is 1200-1800 ℃.
In an alternative embodiment, the diameter of the filament thermocouple 1 is 0.07-0.08 mm, the diameter of the temperature measuring node is 0.08-0.09 mm, and the temperature measuring limit reaches 1750-1850 ℃.
The model of the filament thermocouple 1 is type B (platinum-rhodium 30-platinum-rhodium 6), the diameter of the filament thermocouple is 0.075mm, the diameter of a temperature measuring node is 0.085mm, and the temperature measuring limit reaches 1800 ℃.
Before the experiment, firstly, the high-pressure gas cylinder and the controller 12 are opened, parameters such as preheating time, residence time and the like are set through the controller 12, and communication among all devices is debugged.
Before a formal measurement, it is necessary to first control the regulating device 15 to move the filament thermocouple 1 to a specified height of flame and measurement position, this point being marked as 0 point in the program for subsequent control.
After the test is started, the temperature measuring point of the filament thermocouple 1 is conveyed to a position which is about 5mm away from the flame by the adjusting device 15, and the filament thermocouple 1 is controlled to stay at the temperature measuring point for about 10-15 seconds so as to finish the preheating of the filament thermocouple 1, and the situation that the filament thermocouple 1 is broken due to overlarge stress caused by directly feeding the filament thermocouple into the flame is avoided.
The controller 12 sends out a start signal and records the signal sending time at the same time when the signal sampler 11 is controlled to start by the controller to collect the signal of the filament thermocouple 1 when the preheating position is reached. After the starting signal is sent out, the electromagnetic valve 14 is controlled to be opened, so that the air pressure at the left side of the piston rod of the air cylinder 16 is increased, the piston rod of the air cylinder 16 is rapidly extended, and the temperature measuring point of the filament thermocouple 1 is driven to enter the flame center. After reaching the preset residence time, the signal is sent again, the electromagnetic valve 14 is controlled, the air pressure on the right side of the piston rod of the air cylinder 16 is increased, the piston rod of the air cylinder 16 is quickly retracted, and the temperature measuring point of the filament thermocouple 1 is driven to leave the flame.
The signal sampler 11 stops the signal acquisition of the filament thermocouple 1 and saves the acquired data. Thus, the complete sampling process is completed. Before the next sampling, it is necessary to control the adjusting means 15 to remove the filament thermocouple 1 from the flame, burn off a small amount of soot particles attached to the surface of the filament thermocouple 1 using a butane lance, and check the condition of the filament thermocouple 1. If other position temperatures need to be acquired, the adjusting device 15 is controlled to change the position of the sampling point. The temperature acquisition for a plurality of working conditions or positions can be completed by circulating the above process. After the experiment is completed, the high-pressure gas cylinder and the controller 12 are closed, and the measured temperature data are processed to find the true temperature. In the following data processing process, the influence of the soot particle deposition can be eliminated through an algorithm, so that a more accurate measured value is obtained.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A flame temperature measuring device, comprising: the device comprises a bracket, a filament thermocouple, an elastic piece, a signal sampler, a first connecting seat, a second connecting seat, a first compensation wire, a second compensation wire, a first ceramic tube and a second ceramic tube;
the first connecting seat and the second connecting seat are both rotatably arranged on the bracket, the first ceramic tube penetrates through the first connecting seat, the second ceramic tube penetrates through the second connecting seat, the first ceramic tube and the second ceramic tube are arranged in parallel, or a certain included angle exists between the first ceramic tube and the second ceramic tube, a first distance between the first ceramic tube and the bracket is equal to a second distance between the second ceramic tube and the bracket, the first compensation wire penetrates through the first ceramic tube, the second compensation wire penetrates through the second ceramic tube, the length of the first compensation wire is larger than that of the first ceramic tube, the length of the second compensation wire is larger than that of the second ceramic tube, one end of the first compensation wire is connected with one end of the thermocouple, one end of the second compensation wire is connected with the other end of the filament thermocouple, two ends of the filament thermocouple are respectively connected with one end of the first tube and the second ceramic tube, the other end of the second compensation wire is connected with the other end of the first compensation wire, the other end of the first compensation wire is connected with the other end of the elastic signal sampling element of the first compensation wire, and the other end of the elastic signal element of the second compensation wire is connected with the other end of the elastic element of the first signal element; the flame temperature measuring device also comprises a driving assembly, wherein the driving assembly is connected with the bracket, and the filament thermocouple is relatively close to or relatively far away from the flame under the driving of the driving assembly;
the driving assembly comprises an air source, an air cylinder, an electromagnetic valve and a controller;
the electromagnetic valve is arranged between the air source and the air cylinder, the electromagnetic valve comprises an air inlet, a first air outlet and a second air outlet, the air inlet is connected with the air source, the first air outlet and the second air outlet are respectively connected with two air valves of the air cylinder, a piston rod of the air cylinder is connected with the bracket, and the controller is used for controlling the electromagnetic valve to act; the flame temperature measuring device also comprises a machine body, a horizontal moving structure and a vertical moving structure;
the horizontal moving structure is arranged on the machine body and can move along the horizontal direction, the vertical moving structure is arranged on the horizontal moving structure and can move along the vertical direction, and the driving assembly is arranged on the vertical moving structure;
the flame temperature measuring device further comprises a first driving piece and a second driving piece;
the first driving piece is arranged on the machine body and connected with the horizontal moving structure to drive the horizontal moving structure to move along the horizontal direction;
the second driving piece is arranged on the horizontal moving structure and connected with the vertical moving structure to drive the vertical moving structure to move along the vertical direction;
by the filament thermocouple extending into or out of the flame quickly, the time for soot particles on the way to deposit onto the filament thermocouple is reduced, allowing the effect of soot particle deposition to be described quantitatively, while also reducing the risk of the filament thermocouple breaking due to excessive residence time.
2. The flame temperature measuring device of claim 1, wherein the first and second connection bases are identical in structure, the first connection base includes a threaded rod, the bracket is provided with a threaded hole, and the first connection base is in threaded connection with the threaded hole through the threaded rod.
3. The flame temperature measuring device of claim 2, wherein the first connection base further comprises a mounting base connected to the threaded rod, the mounting base being provided with a first mounting hole in a radial direction, the first ceramic tube passing through the first mounting hole.
4. A flame temperature measuring device according to claim 3, wherein the mount is provided with a second mounting hole in an axial direction, the second mounting hole communicating with the first mounting hole; the first connecting seat further comprises a fastener, the fastener is arranged in the second mounting hole, and the fastener is abutted to the surface of the first ceramic tube.
5. The flame temperature measuring device according to claim 1, wherein the first ceramic tube and the second ceramic tube have the same structure, and the first ceramic tube has an outer diameter of 2.5 to 3.5mm, an inner diameter of 1.5 to 2.5mm, and a length of 250 to 350mm.
6. The flame temperature measuring device according to claim 1, wherein the diameter of the filament thermocouple is 0.07-0.08 mm, the diameter of the temperature measuring node is 0.08-0.09 mm, and the temperature measuring limit is 1750-1850 ℃.
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| CN202111235943.9A CN114034403B (en) | 2021-10-22 | 2021-10-22 | Flame temperature measuring device |
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| CN202111235943.9A CN114034403B (en) | 2021-10-22 | 2021-10-22 | Flame temperature measuring device |
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| CN114034403A CN114034403A (en) | 2022-02-11 |
| CN114034403B true CN114034403B (en) | 2023-07-14 |
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| CN100565143C (en) * | 2007-01-10 | 2009-12-02 | 中国科学院工程热物理研究所 | Straight line butt welding thermopair and measurement modification method |
| CN107806937B (en) * | 2017-10-16 | 2020-03-27 | 首钢集团有限公司 | Device for detecting temperature in rotary kiln |
| CN108980909B (en) * | 2018-06-15 | 2020-06-26 | 李广 | Gas stove system and method capable of preventing dry burning |
| CN109341883A (en) * | 2018-10-25 | 2019-02-15 | 浙江大学 | A kind of total temperature measurement device in aeroengine combustor buring room |
| CN111189552B (en) * | 2020-01-09 | 2021-09-14 | 中国石油大学(华东) | Methane hydrate flame temperature testing device and temperature measurement correction method |
| CN213901968U (en) * | 2020-11-18 | 2021-08-06 | 北京石墨烯研究院 | Temperature measuring device for tube furnace |
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