CN109682854B - Combustion experiment table - Google Patents

Combustion experiment table Download PDF

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Publication number
CN109682854B
CN109682854B CN201811632774.0A CN201811632774A CN109682854B CN 109682854 B CN109682854 B CN 109682854B CN 201811632774 A CN201811632774 A CN 201811632774A CN 109682854 B CN109682854 B CN 109682854B
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combustion
combustion chamber
supporting
ionization degree
measuring devices
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CN201811632774.0A
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CN109682854A (en
Inventor
李雪爱
董文琪
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Yanshan University
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Yanshan University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00Investigating or analyzing materials by the use of thermal means
    • G01N25/20Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
    • G01N25/22Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures

Abstract

The invention discloses a combustion experiment table, which relates to the field of combustion experiment instruments and comprises a combustion chamber, a supporting seat, an exhaust fan, a plurality of temperature measuring devices, a plurality of ionization degree measuring devices and a plurality of supporting frames, wherein the combustion chamber comprises an air inlet, the supporting seat is used for supporting the combustion chamber, the exhaust fan is communicated with the interior of the combustion chamber, the temperature measuring devices, the ionization degree measuring devices and the supporting frames are all arranged in the combustion chamber, and the supporting frames are arranged on the combustion chamber through a telescopic device, the telescopic device is used for adjusting the distance between the support frame and the air inlet, the temperature measuring device and the ionization degree measuring device are both arranged on the support frame, by arranging the telescopic device, this combustion experiment platform can be convenient the adjustment temperature measuring device and the ionization degree measuring device and the air inlet between the distance, can the different positions's of real-time measurement burning flame temperature and ionization degree.

Description

Combustion experiment table
Technical Field
The invention relates to the field of combustion experiment instruments, in particular to a combustion experiment table.
Background
The combustion is a violent exothermic and luminous chemical reaction process, the combustion heat is generated by the chemical reaction, and the flame temperature is a main characteristic parameter of the combustion heat; the combustion luminescence mainly comes from the processes of excitation, ionization and recombination of ions, the processes of generating ions and recombining the ions are continuously carried out in the combustion process, and the states of the ions are main characterization parameters of the combustion luminescence. Therefore, the method for measuring the temperature and the ionization degree of the combustion flame at different positions in real time and investigating the change of the flame temperature and the ionization degree under different combustion conditions is a main means for deeply researching combustion, but no experimental device capable of measuring the temperature and the ionization degree of the combustion flame at different positions in real time exists at present.
Disclosure of Invention
The invention aims to provide a combustion experiment table to solve the problems in the prior art, and the combustion experiment table can measure the temperature and the ionization degree of combustion flame at different positions in real time.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a combustion experiment table which comprises a combustion chamber, a supporting seat, an exhaust fan, a plurality of temperature measuring devices, a plurality of ionization degree measuring devices and a plurality of supporting frames, wherein the combustion chamber comprises an air inlet, the supporting seat is used for supporting the combustion chamber, the exhaust fan is communicated with the interior of the combustion chamber, the temperature measuring devices, the ionization degree measuring devices and the supporting frames are all arranged in the combustion chamber, the supporting frames are arranged on the combustion chamber through telescopic devices, the telescopic devices are used for adjusting the distance between the supporting frames and the air inlet, and the temperature measuring devices and the ionization degree measuring devices are all arranged on the supporting frames.
Preferably, the number of the support frames is two, wherein one of the support frames is used for installing the temperature measuring device, and the other support frame is used for installing the ionization degree measuring device.
Preferably, the number of the temperature measuring devices is a plurality of, and is a plurality of the temperature measuring devices are evenly arranged along the height direction of the support frame, the number of the ionization degree measuring devices is a plurality of, and the ionization degree measuring devices are evenly arranged along the height direction of the support frame.
Preferably, the temperature measuring device is a thermocouple probe.
Preferably, the ionization degree measuring device is a langmuir probe.
Preferably, the retractable device comprises a bolt head and a rotating handle, the bolt head is rotatably mounted on the support frame, one end of the rotating handle penetrates through the side wall of the combustion chamber to be detachably connected with the bolt head, and the rotating handle is in threaded connection with the side wall of the combustion chamber.
Preferably, the support frame is provided with a through groove and a through hole communicated with the through groove, one end of the rotating handle can penetrate through the through hole to be detachably connected with the bolt head, and the bolt head is slidably mounted in the through groove along a direction perpendicular to the axis of the through hole.
Preferably, the combustion device further comprises a communicated air distribution pipe and a combustion nozzle, a plurality of air inlet through holes communicated with the inside of the air distribution pipe are formed in the air distribution pipe, the air inlet through holes are located on the outer portion of the combustion chamber, the combustion nozzle is arranged in the combustion chamber, the air distribution pipe penetrates through the air inlet from the outer portion of the combustion chamber to be detachably connected with the combustion nozzle, and the telescopic device is used for adjusting the distance between the support frame and the combustion nozzle.
Preferably, the supporting seat includes annular support plate and a plurality of supporting leg, and is a plurality of the supporting leg is fixed in annular support plate's bottom, and is a plurality of the supporting leg is followed annular support plate's circumference evenly sets up.
Preferably, the combustion chamber includes casing and seal cap, the casing top seted up with the opening of the inside intercommunication of casing, seal cap detachably set up in the casing top, just seal cap can seal the opening, the exhaust fan set up in on the seal cap.
Compared with the prior art, the invention has the following technical effects:
according to the combustion experiment table provided by the invention, the support frame is arranged on the combustion chamber through the telescopic device, the telescopic device is used for adjusting the distance between the support frame and the air inlet, the temperature measuring device and the ionization degree measuring device are both arranged on the support frame, and through the arrangement of the telescopic device, the distance between the temperature measuring device and the ionization degree measuring device and the air inlet can be conveniently adjusted, so that the temperature and the ionization degree of different positions of combustion flame can be measured in real time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of the overall structure of a combustion test stand according to the present invention;
FIG. 2 is a schematic structural view of the supporting frame;
FIG. 3 is a schematic structural diagram of the retractable device;
FIG. 4 is a schematic structural view of a gas distribution pipe;
fig. 5 is a schematic structural view of the support base.
In fig. 1-5:
1-combustion chamber, 2-sealing top cover, 3-exhaust fan, 4-support frame, 5-thermocouple probe, 6-bolt head, 7-air distribution pipe, 8-combustion nozzle, 9-support seat, 10-Langmuir probe, 11-through groove, 12-through hole, 13-rotating handle, 14-air inlet through hole, 15-rectangular bulge, 16-support leg and 17-annular support plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a combustion experiment table to solve the problems in the prior art, and the combustion experiment table can measure the temperature and the ionization degree of different positions of combustion flame in real time.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
As shown in fig. 1, the present embodiment provides a combustion experiment table, which comprises a combustion chamber 1, a support base 9, an exhaust fan 3, a plurality of temperature measuring devices, a plurality of ionization degree measuring devices, and a plurality of support frames 4, wherein the combustion chamber 1 comprises an air inlet, the support base 9 is used for supporting the combustion chamber 1, the exhaust fan 3 is communicated with the interior of the combustion chamber 1, the temperature measuring devices, the ionization degree measuring devices, and the support frames 4 are all disposed in the combustion chamber 1, and the support frames 4 are mounted on the combustion chamber 1 through a retractable device, the telescopic device is used for adjusting the distance between the support frame 4 and the air inlet, the temperature measuring device and the ionization degree measuring device are both arranged on the support frame 4, by arranging the telescopic device, this combustion experiment platform can be convenient the adjustment temperature measuring device and the ionization degree measuring device and the air inlet between the distance, can the different positions's of real-time measurement burning flame temperature and ionization degree.
In another embodiment of the present invention, as shown in fig. 1, the number of the supporting frames 4 is two, wherein one supporting frame 4 is used for installing a temperature measuring device, and the other supporting frame 4 is used for installing an ionization degree measuring device, so that the temperature and the ionization degree are respectively measured, and the device is more convenient to use.
In another embodiment of the present invention, as shown in fig. 1, the number of the temperature measuring devices is 6, the 6 temperature measuring devices are uniformly arranged along the height direction of the supporting frame 4, the number of the ionization degree measuring devices is 6, and the 6 ionization degree measuring devices are uniformly arranged along the height direction of the supporting frame 4, so that the temperature and the ionization degree at different positions of the combustion flame can be measured more accurately.
In another embodiment of the present invention, the temperature measuring device is a thermocouple probe 5.
In another embodiment of the present invention, the ionization level measuring device is a langmuir probe 10.
In another embodiment of the present invention, as shown in fig. 3, the retractable device comprises a bolt head 6 and a rotating handle 13, the bolt head 6 is rotatably mounted on the supporting frame 4, one end of the rotating handle 13 passes through the side wall of the combustion chamber 1 and is detachably connected with the bolt head 6, preferably, one end of the rotating handle 13 is provided with a rectangular protrusion 15, the bolt head 6 is provided with a rectangular groove matched with the rectangular protrusion 15, and the rotating handle 13 is in threaded connection with the side wall of the combustion chamber 1, so that the supporting frame 4 moves smoothly and the device is convenient to disassemble and assemble.
In another embodiment of the present invention, as shown in fig. 2, the supporting frame 4 is provided with a through slot 11 and a through hole 12 communicated with the through slot 11, one end of the rotating handle 13 can pass through the through hole 12 to be detachably connected with the bolt head 6, and the bolt head 6 can be slidably mounted in the through slot 11 along a direction perpendicular to an axis of the through hole 12.
In another embodiment of the present invention, as shown in fig. 4, the combustion experiment table further includes a gas distribution pipe 7 and a combustion nozzle 8 which are communicated with each other, 2 gas inlet through holes 14 which are communicated with the inside of the gas distribution pipe 7 are arranged on the gas distribution pipe 7, the gas inlet through holes 14 are located outside the combustion chamber 1, the combustion nozzle 8 is arranged inside the combustion chamber 1, and the gas distribution pipe 7 passes through a gas inlet from the outside of the combustion chamber 1 and is detachably connected with the combustion nozzle 8, preferably, the gas distribution pipe 7 is in threaded connection with the combustion nozzle 8, and a telescopic device is used for adjusting the distance between the support frame 4 and the combustion nozzle 8.
In another embodiment of the present invention, as shown in fig. 5, the supporting seat 9 includes an annular supporting plate 17 and a plurality of supporting legs 16, the plurality of supporting legs 16 are fixed at the bottom end of the annular supporting plate 17, and the plurality of supporting legs 16 are uniformly arranged along the circumferential direction of the annular supporting plate 17, and the installation of the air distribution pipe 7 is facilitated by the arrangement of the annular supporting plate 17.
In another embodiment of the present invention, as shown in fig. 1, the combustion chamber 1 includes a casing and a sealing cap 2, preferably, the casing is a hollow cylindrical casing, an opening communicating with the inside of the casing is formed at the top end of the casing, the sealing cap 2 is detachably disposed at the top end of the casing, the sealing cap 2 can seal the opening, and the exhaust fan 3 is disposed on the sealing cap 2.
The combustion experiment carried out by adopting the combustion experiment table comprises the following steps:
step one, a combustion chamber 1 is placed on a supporting seat 9 and is connected with a gas distribution pipe 7 and a combustion nozzle 8 through threads, two gas inlet through holes 14 of the gas distribution pipe 7 are provided, one gas inlet through hole 14 is connected with combustion gas, the other gas inlet through hole 14 is connected with oxidation gas, preferably, the combustion gas is hydrogen and methane, and the oxidation gas is oxygen;
secondly, placing two support frames 4 on two sides of a combustion nozzle 8 in the combustion chamber 1 respectively, installing a rotating handle 13 and a bolt head 6, installing a thermocouple probe 5 and a Langmuir probe 10 aiming at the two support frames 4 respectively, and connecting the thermocouple probe 5 and the Langmuir probe 10 with a measurement line, wherein the measurement line is connected with a controller;
step three, connecting the two air inlet through holes 14, starting air inlet, igniting air, forming combustion flame, adjusting the position of the support frame 4, observing the measurement signals of the thermocouple probe 5 and the Langmuir probe 10, installing the sealing top cover 2 after the signals of the thermocouple probe 5 and the Langmuir probe 10 can be measured, opening the exhaust fan 3 on the sealing top cover 2, and setting the exhaust air quantity to be equal to the air inlet quantity;
and step four, adjusting the position of the support frame 4 by rotating the rotating handle 13, and measuring the temperature and the ionization degree of different positions of the combustion flame.
In addition, the air inflow is kept unchanged, and the air exhaust quantity of the exhaust fan 3 is increased, so that the flame temperature and the ionization degree under low pressure can be inspected; the flame temperature and the ionization degree under high pressure can be observed by reducing the exhaust air quantity.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (5)

1. A combustion experiment table is characterized in that: the device comprises a combustion chamber, a supporting seat, an exhaust fan, a plurality of temperature measuring devices, a plurality of ionization degree measuring devices and a plurality of supporting frames, wherein the combustion chamber comprises an air inlet, the supporting seat is used for supporting the combustion chamber, the exhaust fan is communicated with the interior of the combustion chamber, the temperature measuring devices, the ionization degree measuring devices and the supporting frames are all arranged in the combustion chamber, the supporting frames are installed on the combustion chamber through telescopic devices, the telescopic devices are used for adjusting the distance between the supporting frames and the air inlet, and the temperature measuring devices and the ionization degree measuring devices are all arranged on the supporting frames; the number of the support frames is two, wherein one support frame is used for mounting the temperature measuring device, and the other support frame is used for mounting the ionization degree measuring device; the ionization degree measuring device comprises a plurality of temperature measuring devices, a plurality of ionization degree measuring devices and a plurality of support frames, wherein the temperature measuring devices are uniformly arranged along the height direction of the support frames; the telescopic device comprises a bolt head and a rotating handle, the bolt head is rotatably arranged on the support frame, one end of the rotating handle penetrates through the side wall of the combustion chamber and is detachably connected with the bolt head, and the rotating handle is in threaded connection with the side wall of the combustion chamber; the support frame is provided with a through groove and a through hole communicated with the through groove, one end of the rotating handle can penetrate through the through hole to be detachably connected with the bolt head, and the bolt head is slidably arranged in the through groove along the direction vertical to the axis of the through hole; the air distribution pipe is provided with a plurality of air inlet through holes communicated with the inside of the air distribution pipe, the air inlet through holes are located outside the combustion chamber, the combustion nozzle is arranged inside the combustion chamber, the air distribution pipe penetrates through the outside of the combustion chamber, the air inlet is detachably connected with the combustion nozzle, and the telescopic device is used for adjusting the distance between the support frame and the combustion nozzle.
2. The combustion laboratory bench of claim 1 wherein: the temperature measuring device is a thermocouple probe.
3. The combustion laboratory bench of claim 1 wherein: the ionization degree measuring device is a Langmuir probe.
4. The combustion laboratory bench of claim 1 wherein: the supporting seat comprises an annular supporting plate and a plurality of supporting legs, the supporting legs are fixed at the bottom end of the annular supporting plate, and the supporting legs are arranged along the circumferential direction of the annular supporting plate evenly.
5. The combustion laboratory bench of claim 1 wherein: the combustion chamber includes casing and seal cap, the casing top seted up with the opening of the inside intercommunication of casing, seal cap detachably set up in the casing top, just seal cap can seal the opening, the exhaust fan set up in seal cap is last.
CN201811632774.0A 2018-12-29 2018-12-29 Combustion experiment table Active CN109682854B (en)

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CN109682854B true CN109682854B (en) 2020-10-09

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206837310U (en) * 2017-05-10 2018-01-05 南京工业大学 The small-scale experiment device of powder extinguishing agent fire extinguishing effectiveness test

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102375046B (en) * 2010-08-18 2014-06-18 中国科学技术大学 Simulation experiment box
CN104076119A (en) * 2014-06-18 2014-10-01 广州市建筑材料工业研究所有限公司 Device and method for measuring liquid combustion characteristic
CN106093285A (en) * 2016-08-26 2016-11-09 南京师范大学 A kind of multicomponent gas diffusion combustion and combustion monitoring device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206837310U (en) * 2017-05-10 2018-01-05 南京工业大学 The small-scale experiment device of powder extinguishing agent fire extinguishing effectiveness test

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