CN112879947B - Closed type gas flame observation equipment with five-degree-of-freedom object interference - Google Patents
Closed type gas flame observation equipment with five-degree-of-freedom object interference Download PDFInfo
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- CN112879947B CN112879947B CN202110083732.1A CN202110083732A CN112879947B CN 112879947 B CN112879947 B CN 112879947B CN 202110083732 A CN202110083732 A CN 202110083732A CN 112879947 B CN112879947 B CN 112879947B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M11/00—Safety arrangements
- F23M11/04—Means for supervising combustion, e.g. windows
- F23M11/045—Means for supervising combustion, e.g. windows by observing the flame
Abstract
The invention discloses a gas flame observation device for closed five-degree-of-freedom object interference, which comprises an interference control device arranged in a reactor shell, wherein the interference control device comprises an interference position control assembly and an interference angle control assembly; the interference position control assembly comprises a sliding block arranged on a horizontal guide rail at the upper part in the box body, the interference angle control assembly comprises a rotary table, a rotary table groove and an in-groove sliding block, the rotary table groove and the in-groove sliding block are uniformly distributed along the center of the rotary table groove, the lower part of the sliding block is hinged with a rotating shaft through a hinge shaft, and the rotating range of the rotating shaft around the axis of the vertical shaft is 90 degrees; the rotary table is connected with the interference position control assembly, and the motion of the free end of the rotating shaft is a compound motion with five degrees of freedom. The invention can effectively simulate the interference condition of the disturbance object to the flame at different positions and angles in a closed environment, effectively observe the gas combustion flame form under the interference condition of different objects and enrich the related data of the flame form and the brightness. The device is safe and reliable and is convenient to disassemble, assemble and maintain.
Description
Technical Field
The present invention relates to a combustion apparatus having an injection device for injecting fuel into a combustion chamber, and more particularly to a combustion apparatus having an injection device for injecting fuel into a combustion chamber.
Background
In the chemical field, the combustion and explosion disasters of combustible gas often bring huge life and property losses to people. In the mining industry, the direct economic loss caused by accidents caused by combustion and explosion of combustible gas reaches nearly 2.3 hundred million dollars each year in China. In daily life, fire injection accidents caused by natural gas pipeline leakage also occur occasionally.
In the above accidents, the propagation characteristics of the flame often determine the severity of the accident. The propagation characteristics of the flame are affected by interfering objects in its propagation path. When the flame encounters obstacles during the propagation process, the flame shape, the flame propagation speed, the flow field and the overpressure of the flame are affected and changed. In a coal mine tunnel, once a gas explosion accident occurs, various obstacles such as ventilation equipment, electromechanical equipment, maintenance equipment, various pipelines and the like can destabilize and accelerate flame, further induce shock waves and even detonation waves, and bring about great life and property loss. Therefore, it is necessary to study the propagation of the flame under different disturbances.
The current research on flame interference mainly focuses on flat obstacles, interference of netted interfering animals and the like, and the research on the interference of objects mainly focuses on the influence of the shape, the position and the placement mode of the objects on flame propagation. The selection of disturbance in a specific experiment is limited, the setting of conditions such as the direction, the angle, the placement mode and the like of a disturbed object is severely limited by experimental equipment, and the selected scheme cannot completely reproduce the complex situation in the fire. The existing experimental equipment can not meet the research requirements corresponding to the actual situation, and a set of new observation device is necessary to be designed in order to better observe the disturbed flame state under the conditions of different object shapes, positions and placement modes, effectively expand the related experimental amount, enrich the experimental design and effectively reproduce the complex situation of a fire scene.
Disclosure of Invention
In order to meet the requirements of flame research under the condition of gas combustion and object interference at present, a set of new experimental device is needed to be designed, and the set of device has the following requirements that the sealing is realized firstly, the influence of the external environment is avoided, and the interference of convection on the flame form is reduced as much as possible; secondly, the device can complete stable ignition combustion; thirdly, the flame needs to be observed in multiple directions, the data volume of flame shape and flame brightness under different disturbance conditions (including disturbance factors such as the shape, the direction and the angle of a disturbance object) is enlarged, and meanwhile, the flame research and the flue gas research are combined to fully exert the characteristics of the closed reactor. This is the problem to be solved by the present invention. Aiming at the prior art, the invention provides a closed gas flame observation device interfered by an object with five degrees of freedom, which can effectively simulate the interference condition of disturbed objects with different shapes on flames at different positions and at different angles, realize a closed experimental environment, effectively observe the gas combustion flame form under the interference of the objects, and enrich the related data of the flame form and the brightness when the objects with different positions and forms interfere. The device is safe and reliable and is convenient to disassemble, assemble and maintain.
In order to solve the technical problem, the invention provides a gas flame observation device for closed five-degree-of-freedom object interference, which comprises an interference control device arranged in a reactor shell, wherein the reactor shell comprises a box body, a top cover and a toughened glass observation window, and a top cover handle is arranged on the top cover; a sample inlet hole and an ignition hole are formed in the same side wall of the box body and are positioned at the same horizontal position, the sample inlet hole is used for connecting a gas fuel sample introduction conduit, and the ignition hole is used for connecting an electric heating wire igniter; a central hole and four through holes which are uniformly distributed around the periphery of the central hole along the circumferential direction are arranged on a bottom plate of the box body, the central hole and the two through holes which are symmetrically arranged left and right are used for installing three pairs of thermocouples, and the other two through holes are respectively an air inlet hole and an air outlet hole; the interference control device comprises an interference position control component and an interference angle control component; the interference position control assembly comprises a horizontal guide rail arranged at the upper part in the box body, a guide rail sliding block in sliding fit is arranged on the horizontal guide rail, the guide rail sliding block is driven by a first motor, a position sensor for detecting the position of the guide rail sliding block is arranged in the box body, and the first motor and the position sensor are both connected with an electric control device; the interference angle control assembly comprises a rotary table, the rotary table is driven by a second motor, and the second motor is connected with the electric control device; the turntable is provided with a central threaded hole, four turntable grooves which are radially arranged are arranged around the central threaded hole, every two of the four turntable grooves are spaced by 90 degrees, the distance between two opposite side surfaces A on the width of each turntable groove is equal, and two opposite side surfaces B on the length of each turntable groove are cylindrical inner rotating surfaces tangent to the side surfaces A; the automatic control device comprises four rotary disc grooves, wherein a sliding block is arranged in at least one of the four rotary disc grooves, the sliding block is connected with an electric control device, a vertical shaft is arranged at the lower part of the sliding block, the tail end of the vertical shaft is hinged to a rotating shaft through a hinge shaft, the hinge shaft rotates around the axis of the vertical shaft, and the rotating range of the rotating shaft relative to the vertical shaft is 90 degrees; the free end of the rotating shaft is provided with a connecting structure for connecting an interference object; the guide rail sliding block in the interference position control assembly is connected with an upper stud which is connected with an electric control device, and the turntable in the interference angle control assembly is connected with a lower stud through a central threaded hole; the upper stud is fixedly connected with the lower stud; the motion of the free end of the rotating shaft is a compound motion with five degrees of freedom.
Further, the gas flame observing apparatus of the present invention, wherein,
the box is characterized in that brackets for mounting the horizontal guide rails are respectively arranged on the inner walls of the left side and the right side of the box body, clamping grooves with upward openings are formed in the brackets, and the two ends of each horizontal guide rail are clamped in the clamping grooves.
The air inlet is connected with an air inlet guide pipe, the air outlet is connected with an air outlet guide pipe, and the air inlet guide pipe and the air outlet guide pipe are respectively connected to an air pump; and the air inlet guide pipe and the air exhaust guide pipe are respectively provided with a flowmeter.
The three pairs of thermocouples are uniformly distributed at the height positions from top to bottom, and the horizontal positions are determined according to the specific form of the flame.
The front of the box body is provided with a window for installing the toughened glass observation window, the edge of the window is provided with a clamping groove for assembling the toughened glass observation window, and a high-temperature-resistant sealing material is arranged between the toughened glass observation window and the clamping groove.
The top internal orifice of box is equipped with the ladder face, the top cap cooperates with the internal orifice of ladder face, with be equipped with high temperature resistant sealing material between top cap and the internal orifice.
The top cover handle is welded with the top cover.
Compared with the prior art, the invention has the beneficial effects that:
the closed gas flame observation equipment interfered by the five-degree-of-freedom object can realize the control of the space position of the interfered object with multiple degrees of freedom and higher precision, realize the experimental conditions of interference of various objects and enrich the flame observation data under the interference of the objects; the invention adopts a closed design, effectively controls the influence of the external environment on the flame shape, and inhibits the internal and external convection; the invention can be externally connected with a gas component identification device to meet the function of tail gas component analysis. The invention has compact integral structure, is easy to maintain and disassemble, and can provide safe and reliable disturbance flame observation experiment conditions.
Drawings
FIG. 1 is a sectional view showing the overall structure of a gas flame observing apparatus of the present invention;
FIG. 2 is a cross-sectional view of the interference position control assembly and the interference angle control assembly shown in FIG. 1;
fig. 3 is a top view of the turntable 5 shown in fig. 2;
FIG. 4 is a bottom view of the case shown in FIG. 1;
FIG. 5 is a left side view of the case shown in FIG. 1;
FIG. 6 is a front view of the case shown in FIG. 1;
fig. 7 is an external perspective view of the gas flame observation apparatus shown in fig. 1.
In the figure:
1-top cover handle 2-guide rail slide block 3-connecting block 4-upper stud
No. 5-turntable 6-lower stud 7-vertical shaft No. 8-1 bottom through hole
9-center hole, No. 10-No. 2 bottom through hole, 11-hinge shaft, 12-rotating shaft
13-slide block 14-sample inlet hole 15-horizontal guide rail 16-bracket
17-box 18-top cover 19-toughened glass observation window 20-turntable groove
No. 21-3 bottom through hole 22-No. 4 bottom through hole 23-ignition hole 24-clamping groove
Detailed Description
The invention will be further described with reference to the following drawings and specific examples, which are not intended to limit the invention in any way.
The invention provides a closed gas flame observation device interfered by a five-degree-of-freedom object, which comprises an interference control device arranged in a reactor shell.
The reactor shell comprises a box body 17, a top cover 18 and a toughened glass observation window 19, wherein the top cover 18 is provided with a top cover handle 1, the box body 17 is a cuboid box body with an opening at the top and a window at the front part, and the view is shown in fig. 7; the window that sets up in the front of box 17 is used for installing toughened glass observation window 19, the border of window is equipped with the draw-in groove 24 that is used for assembling toughened glass observation window 19, and the juncture of toughened glass observation window 19 and box 17 adopts the ladder trough face to assemble promptly, toughened glass observation window 19 is used for the observation of flame form, as shown in fig. 6, be equipped with high temperature resistant sealing compound between toughened glass observation window 19 and the draw-in groove 24. The open-top's of box 17 internal orifice is the ladder face, top cap 18 and the cooperation of the internal orifice of ladder face, with be equipped with high temperature resistant sealing material between top cap 18 and the internal orifice. The top cover handle 1 is welded with the top cover 18.
As shown in fig. 5, a sample inlet 14 and an ignition hole 23 are provided on the same side wall of the box 17 and at the same horizontal position, the sample inlet 14 is located at substantially the center of the side wall, the sample inlet 14 is used for connecting a gas fuel sample inlet pipe, and the ignition hole 23 located beside the sample inlet 14 is used for connecting a heating wire igniter; as shown in fig. 4, five small holes are formed in the bottom plate of the box 17, the centers of the five small holes are on the same cross line, that is, the five small holes include a central hole 9 located in the center and four through holes uniformly distributed around the central hole 9 along the circumferential direction, the center distances of the central hole and the four through holes are equal, 4 through holes around the central hole are respectively marked as a No. 1 bottom through hole 8, a No. 2 bottom through hole 10, a No. 3 bottom through hole 21 and a No. 4 bottom through hole 22, the central hole 9 and the No. 1 bottom through hole 8 and the No. 2 bottom through hole 10 which are symmetrically arranged left and right are used for installing three pairs of thermocouples respectively, the height positions of the three pairs of thermocouples are uniformly distributed from top to bottom, and the horizontal position is determined according to the specific shape of the flame.
The other No. 3 bottom through hole 21 and the No. 4 bottom through hole 22 are respectively an air inlet hole and an air outlet hole; the air inlet is connected with an air inlet guide pipe, the exhaust hole is connected with an exhaust guide pipe, and the air inlet guide pipe and the exhaust guide pipe are respectively connected to an air pump; and the air inlet guide pipe and the air exhaust guide pipe are respectively provided with a flowmeter.
The interference control device comprises an interference position control component and an interference angle control component.
As shown in fig. 1, the interference position control assembly includes a horizontal guide rail 15 disposed at an upper portion in the box 17, brackets 16 for mounting the horizontal guide rail 15 are respectively disposed at left and right symmetrical positions on inner walls of left and right sides of the box 17, each bracket 16 is provided with a slot with an upward opening, the overall shape of each bracket 16 is horseshoe-shaped, the distance of the widest position of each slot is slightly larger than the outer diameter of the horizontal guide rail 15, and two ends of the horizontal guide rail 15 are clamped in the slots, so that the horizontal guide rail 15 is convenient to detach. The horizontal guide rail 15 is provided with a guide rail sliding block 2 in sliding fit, the guide rail sliding block 2 is driven by a first motor, a position sensor used for detecting the position of the guide rail sliding block 2 is arranged in the box body 17, the first motor and the position sensor are both connected with an electric control device, and the electric control device controls the first motor to drive the guide rail sliding block 2 to move along the horizontal guide rail 15 according to signals of the position sensor.
As shown in fig. 1 and 2, the interference angle control assembly includes a rotary table 5, the rotary table 5 is driven by a second motor, and the second motor is connected with an electric control device; as shown in fig. 3, the rotary plate 5 is provided with a central threaded hole, four rotary plate grooves 20 which are radially arranged are arranged around the central threaded hole, the four rotary plate grooves 20 are spaced by 90 degrees in pairs, two opposite side surfaces a on the width of each rotary plate groove 20 have the same distance, and two opposite side surfaces B on the length of each rotary plate groove 20 are cylindrical inner rotary surfaces tangent to the side surfaces a; in the four rotary table slots 20, at least one of the rotary table slots 20 is provided with a sliding block 13, but it is not excluded that two, three or four rotary table slots 20 are provided with sliding blocks 13, as shown in fig. 3, in this embodiment, one rotary table slot 20 is provided with one sliding block 13, the sliding block 13 is connected with an electric control device, the lower part of the sliding block 13 is a vertical shaft 7, the tail end of the vertical shaft 7 is hinged with a rotating shaft 12 through a hinge shaft 11, the hinge shaft 11 rotates around the axis of the vertical shaft 7, and the rotating shaft 12 can rotate within 90 degrees by taking the hinge shaft 11 as a center; the free end of the rotating shaft 12 is provided with a connecting structure for connecting an interfering object, for example, a threaded hole is formed at one side of the free end of the rotating shaft 12 to connect interfering objects of different shapes by screw.
As shown in fig. 1, 2 and 3, the rail slider 2 in the interference position control assembly is connected with an upper stud 4 through a connecting block 3, that is, the rail slider 2 is fixedly connected with a connecting block 3 slightly smaller than the cube shape of the rail slider 2, a vertical (perpendicular to the horizontal guide rail 15) threaded hole is formed in the connecting block 3, and the upper stud 4 is fixed with the rail slider 2 through the threaded hole. And the turntable 5 in the interference angle control assembly is connected with a lower stud 6 through a central threaded hole.
The upper stud 4 is connected with an electric control device, the upper stud 6 is fixedly connected with the upper stud 4, so that the interference angle control assembly is connected to the lower end of the interference position control assembly, the electric control device controls a first motor and a second motor, the first motor drives the guide rail slide block 2 to move along a horizontal guide rail, the second motor drives the rotary table 5 to rotate, the slide block 13 drives the vertical shaft 7 to freely move along the radial direction of the rotary table 5, the rotary shaft 12 rotates by taking the hinge shaft 11 as a center, and finally the movement of the free end of the rotary shaft 12 is a compound movement with five degrees of freedom.
In the invention, a multi-camera high-speed camera is adopted to observe the flame form through a toughened glass observation window 19 in front of a box body 17.
The experimental process of observing the gas fuel combustion flame under the disturbance of the object by using the closed type gas flame observation equipment with five-degree-of-freedom object interference of the invention is described below.
Before the experiment, the positioning work of the interference object needs to be completed firstly. The required disturbance object is firstly installed at the tail end of the rotating shaft 12 of the disturbance angle control device, the guide rail sliding block 2 of the disturbance position control device is driven to the specified horizontal position along the horizontal guide rail 15 through the electric control device, and meanwhile, the disturbance object installed at the tail end of the rotating shaft 12 of the disturbance angle control device can also be moved to the specified horizontal position along with the guide rail sliding block 2. Then, the rotating phase of the upper stud 4 is adjusted through an electric control device, and the interference object is controlled to be in a specified vertical position. And then the electric control device drives the second motor to rotate the rotating disc 5, and the interference angle control device slide block 13 is moved in the rotating disc groove 20 to control the interference object to move to the horizontal position required by the experiment in the space (the vertical position change caused by rotating the rotating disc 5 can be ignored). Then, the head-on position of the interfering object is finely adjusted by adjusting the rotation angle of the hinge shaft 11 to adjust the rotation angle of the rotary shaft 12. The position setting of the three-dimensional space movement freedom degree and the two rotation freedom degrees (namely five freedom degrees) of the interference object can be realized through the adjustment, the interference object can be placed at any position in the adjusting range, the freedom and precision of the position change of the object are ensured, and the installation requirement of related objects of the flame observation experiment under the interference of the current object is met.
After the position of the interference object is set, three pairs of thermocouples are uniformly distributed from top to bottom through a bottom center hole 9, a No. 1 bottom through hole 8 and a No. 2 bottom through hole 10, a gas fuel sample introduction guide pipe is assembled in a sample introduction hole 14 in the side wall of the box body 17, an electric heating wire igniter is inserted in an ignition hole 23 in the side wall of the box body 17, and a high-temperature sealing material is filled in a slit of related equipment. The top cover 18 of the case is closed, and a high-temperature sealing material is filled in a gap between the top cover 18 of the case and the case 17. An intake duct and an exhaust duct are fitted in the No. 3 bottom through hole 21 and the No. 4 bottom through hole 22, respectively, and an air pump and a flow meter are installed. Air or oxygen is introduced into the inner cavity of the box body 17 according to experimental requirements, the gas flow is observed through the gas inlet and outlet pipe flow meter, when the gas inlet and outlet flows are close, the integral gas tightness of the device can be judged to be good, and the experiment can be further carried out. If the air tightness is not good, further maintenance is needed.
In the experiment, the gas fuel is firstly fed into the device through the gas fuel sample inlet conduit assembled on the sample inlet hole 14 on the side wall of the box body 17, and then the gas fuel flow is rapidly ignited through the electric heating wire igniter inserted in the ignition hole 23. And experimental parameters such as flame form, flame brightness and the like are observed by adopting a multi-camera high-speed camera through a toughened glass observation window 19. And then, the positioning of the interference object can be repeated, the relevant position parameters of the interference object are changed, and the observation is repeated.
After the experiment is finished, if needed, rare gas can be introduced into the inner space through the gas inlet guide pipe assembled in the No. 3 bottom hole 21, and combustion tail gas is pumped into the tail gas component identification device through the gas outlet guide pipe assembled in the No. 4 bottom hole 22. If not needed, the waste gas can be directly pumped into the waste gas treatment device. If necessary, the box top cover 18 can be opened through the box top cover handle 1, the disturbance object is replaced, and the next experiment is carried out.
In conclusion, the closed gas flame observation equipment interfered by the five-degree-of-freedom object realizes the positioning of the disturbance objects with three moving degrees of freedom and two rotating degrees of freedom, namely freedom and precision by matching the multi-stage positioning device and the electric control device, and ensures the feasibility of carrying out gas flame observation experiments under the conditions of various disturbance objects and a plurality of disturbance positions; through the closed design, the inhibition of internal and external convection is ensured, and the influence of the external environment on gas flame is limited; through the design of the observation window, a multi-machine high-speed camera can be adopted to observe the gas flame form; related functions of tail gas detection and analysis are realized by arranging the holes and the external equipment. On the basis of meeting the relevant requirements of a gas flame observation experiment under object disturbance, the gas flame observation device is compact in structure and easy to disassemble and maintain.
While the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are illustrative only and not restrictive, and various modifications which do not depart from the spirit of the present invention and which are intended to be covered by the claims of the present invention may be made by those skilled in the art.
Claims (8)
1. A gas flame observation device for closed five-degree-of-freedom object interference comprises an interference control device arranged in a reactor shell, wherein the reactor shell comprises a box body (17), a top cover (18) and a toughened glass observation window (19), and a top cover handle (1) is arranged on the top cover (18); it is characterized in that the preparation method is characterized in that,
a sample inlet hole (14) and an ignition hole (23) are formed in the same side wall of the box body (17) and are positioned at the same horizontal position, the sample inlet hole (14) is used for being connected with a gas fuel sample inlet guide pipe, and the ignition hole (23) is used for being connected with an electric heating wire igniter; a central hole (9) and four through holes uniformly distributed around the periphery of the central hole (9) in the circumferential direction are formed in a bottom plate of the box body (17), the central hole (9) and the two through holes which are symmetrically arranged left and right are used for installing three pairs of thermocouples, and the other two through holes are respectively an air inlet hole and an air outlet hole;
the interference control device comprises an interference position control component and an interference angle control component;
the interference position control assembly comprises a horizontal guide rail (15) arranged at the upper part in the box body (17), a guide rail sliding block (2) in sliding fit is arranged on the horizontal guide rail (15), the guide rail sliding block (2) is driven by a first motor, a position sensor for detecting the position of the guide rail sliding block (2) is arranged in the box body (17), and the first motor and the position sensor are both connected with an electric control device;
the interference angle control assembly comprises a rotary table (5), the rotary table (5) is driven by a second motor, and the second motor is connected with an electric control device; the turntable (5) is provided with a central threaded hole, four turntable grooves (20) which are radially arranged are arranged around the central threaded hole, every two of the four turntable grooves (20) are spaced by 90 degrees, the distance between two opposite side surfaces A on the width of each turntable groove (20) is equal, and two opposite side surfaces B on the length of each turntable groove (20) are cylindrical inner rotating surfaces tangent to the side surfaces A; a slide block (13) is arranged in at least one of the four rotary disc grooves (20), and the slide block (13) is connected with an electric control device; the lower part of the sliding block (13) is a vertical shaft (7), the tail end of the vertical shaft (7) is hinged with a rotating shaft (12) through a hinge shaft (11), the hinge shaft (11) rotates around the axis of the vertical shaft (7), and the rotating range of the rotating shaft (12) relative to the vertical shaft (7) is 90 degrees; the free end of the rotating shaft (12) is provided with a connecting structure for connecting an interference object;
a guide rail sliding block (2) in the interference position control assembly is connected with an upper stud (4), the upper stud (4) is connected with the electric control device, and a rotary table in the interference angle control assembly is connected with a lower stud (6) through a central threaded hole; the lower stud (6) is fixedly connected with the upper stud (4);
the motion of the free end of the rotating shaft (12) is a compound motion with five degrees of freedom.
2. The gas flame observation device according to claim 1, wherein brackets (16) for mounting the horizontal guide rails (15) are respectively arranged on the inner walls of the left side and the right side of the box body (17), clamping grooves with upward openings are arranged on the brackets (16), and two ends of the horizontal guide rails (15) are clamped in the clamping grooves.
3. A gas flame viewing apparatus as claimed in claim 2, wherein the carrier (16) is of unitary construction with the internal wall of the tank (17).
4. A gas flame observation apparatus according to claim 1, wherein said gas inlet hole is connected to a gas inlet conduit, said gas outlet hole is connected to a gas outlet conduit, and said gas inlet conduit and said gas outlet conduit are each connected to a gas pump; and the air inlet guide pipe and the air exhaust guide pipe are respectively provided with a flowmeter.
5. A gas flame observation apparatus as claimed in claim 1, wherein the three pairs of thermocouples are uniformly distributed in height from top to bottom, the horizontal positions being determined according to the specific shape of the flame.
6. The gas flame observation device according to claim 1, wherein a window for installing the tempered glass observation window (19) is formed in the front of the box body (17), a clamping groove (24) for assembling the tempered glass observation window (19) is formed in the edge of the window, and a high-temperature-resistant sealing material is arranged between the tempered glass observation window (19) and the clamping groove (24).
7. A gas flame observation apparatus as claimed in claim 1, wherein the inner opening of the top of the box body (17) is provided with a stepped surface, the top cover (18) is fitted with the inner opening of the stepped surface, and a high temperature resistant sealant is provided between the top cover (18) and the inner opening.
8. Gas flame viewing apparatus according to claim 1, wherein the cover handle (1) is welded to the cover (18).
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