CN116518370B - Burner with a burner body - Google Patents
Burner with a burner body Download PDFInfo
- Publication number
- CN116518370B CN116518370B CN202310797737.XA CN202310797737A CN116518370B CN 116518370 B CN116518370 B CN 116518370B CN 202310797737 A CN202310797737 A CN 202310797737A CN 116518370 B CN116518370 B CN 116518370B
- Authority
- CN
- China
- Prior art keywords
- flow
- gas
- porous medium
- medium layer
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000000903 blocking effect Effects 0.000 claims abstract description 46
- 238000002485 combustion reaction Methods 0.000 claims abstract description 32
- 238000000926 separation method Methods 0.000 claims description 8
- 238000013459 approach Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000005496 tempering Methods 0.000 abstract description 14
- 239000007789 gas Substances 0.000 description 113
- 230000004888 barrier function Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000003063 flame retardant Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000191 radiation effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/74—Preventing flame lift-off
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/82—Preventing flashback or blowback
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/84—Flame spreading or otherwise shaping
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The application relates to the technical field of burners, and provides a burner which comprises a burner body, wherein a combustion chamber is arranged in the burner body, a porous medium layer is arranged in the combustion chamber, and a plurality of fire holes are formed in the porous medium layer; and the gas distribution device is arranged at the gas inlet end of the burner body and comprises a thermosensitive resetting piece, a blocking piece and a gas distribution flow equalization plate, the gas distribution flow equalization plate is connected with the gas inlet end of the burner body, a plurality of through holes are formed in the gas distribution flow equalization plate and communicated with the combustion chamber, the blocking piece is arranged at one side of the gas distribution flow equalization plate, which is away from the porous medium layer, the thermosensitive resetting piece is connected with the blocking piece, and the thermosensitive resetting piece can drive the blocking piece to block the through holes at the upper part of the gas distribution flow equalization plate when the temperature in the burner is greater than a threshold value. The flow area is reduced by blocking part of the through holes, so that the airflow velocity in the porous medium layer is improved, and tempering is prevented.
Description
Technical Field
The application relates to the technical field of combustors, in particular to a combustor with an adjustable overflow area.
Background
Porous media combustion technology is becoming increasingly popular with users as a new combustion technology. The porous medium burner belongs to submerged combustion, and in the working process of the porous medium burner, due to the heat accumulation and radiation effects of the porous medium, gas in or near the porous medium is continuously heated, and even the gas flow flowing upstream of the porous medium is ignited when the temperature is too high, so that the risk of tempering is generated.
In the related art, a fire-blocking net is used in the porous medium burner to block backfire. The tempering preventing capability of the fire-retardant net mainly depends on the mesh size, the smaller the mesh of the fire-retardant net is, the better the tempering preventing capability is, but the flow resistance of the mixed gas is increased along with the reduction of the mesh aperture of the fire-retardant net, so that the flow rate of the mixed gas is reduced, and insufficient combustion or fire is easily caused; and the mesh aperture of the fire-retardant net is increased, and the tempering resistance is reduced. Therefore, there is room for improvement.
Disclosure of Invention
The application aims to provide a burner which can effectively solve the problem of tempering caused by the temperature overtemperature of a porous medium.
In view of the above technical problems, the present application provides a burner, including:
the burner body is internally provided with a combustion chamber, a porous medium layer is arranged in the combustion chamber, and a plurality of fire holes are formed in the porous medium layer; and
the gas distribution device is arranged at the gas inlet end of the burner body and comprises a thermosensitive resetting piece, a blocking piece and a gas distribution flow equalization plate, the gas distribution flow equalization plate is connected with the gas inlet end of the burner body, a plurality of through holes are formed in the gas distribution flow equalization plate and communicated with the combustion chamber, the blocking piece is arranged on one side, deviating from the porous medium layer, of the gas distribution flow equalization plate, the thermosensitive resetting piece is connected with the blocking piece, and the thermosensitive resetting piece can drive the blocking piece to block the through holes in the upper part of the gas distribution flow equalization plate when the temperature in the burner is greater than a threshold value.
According to the burner in the embodiment, after the temperature of the porous medium layer rises to the threshold value with tempering risk, the heat-sensitive reset piece can stretch, and the heat-sensitive reset piece stretches to drive the plugging piece to plug the through holes at the upper part of the gas-dividing flow-equalizing plate, so that the flow area of the gas-dividing flow-equalizing plate is reduced, the flow speed of the gas passing through the unblocked through holes on the gas-dividing flow-equalizing plate is increased, the gas flow speed of the mixed gas passing through the porous medium layer is increased, the incoming gas flow with low temperature is filled into the porous medium layer, the porous medium layer is cooled, and the temperature of the porous medium layer is reduced. Therefore, the temperature reduction of the porous medium layer can be accurately and automatically controlled, and tempering is effectively prevented. In addition, when the temperature of the porous medium layer does not reach the threshold value of tempering risk, the thermosensitive reset piece resets to drive the blocking piece to be far away from the through hole, so that the overflow area is large, the mixed gas is ensured to be supplied sufficiently, and the situation of fire or insufficient combustion can not occur.
In one embodiment, the gas-dividing and flow-equalizing plate is arranged in a manner of being abutted against the gas inlet end face of the porous medium layer, and the through holes are correspondingly communicated with the fire holes.
In one embodiment, the gas distributing device further comprises a gas distributing cylinder, and the plugging piece and the gas distributing flow equalizing plate are arranged between the gas distributing cylinder and the burner body; the thermosensitive reset piece is a thermosensitive spring, and the thermosensitive spring is arranged between the plugging piece and the gas cylinder and can stretch along with the temperature rise so as to drive the plugging piece to approach the gas distribution flow equalization plate.
In one embodiment, the through holes comprise inner through holes and outer through holes, the inner through holes are arranged at the center part of the gas-dividing and flow-equalizing plate, the outer through holes are circumferentially arranged at the outer sides of all the inner through holes, and the aperture of the outer through holes is larger than that of the inner through holes.
In one embodiment, the plugging piece comprises an annular main body and a plurality of plugging convex blocks protruding from the annular end face of the main body, wherein the plugging convex blocks can be embedded in the outer through holes in a one-to-one correspondence manner so as to plug the outer through holes.
In one embodiment, the surface of the gas-dividing and flow-equalizing plate facing the plugging piece is convexly provided with a limit ring, and the limit ring is arranged between the inner through flow hole and the outer through flow hole;
the main body can be sleeved on the periphery of the limit ring.
In one embodiment, the gas distributing device further comprises a flow equalizing cover, the flow equalizing cover is arranged between the gas distributing and equalizing plate and the gas inlet of the gas distributing device, and a plurality of flow equalizing holes are formed in the flow equalizing cover.
In one embodiment, the apertures of the plurality of flow equalization holes gradually increase in a direction from the center to the edge of the flow equalization cap.
In one embodiment, the flow equalizing cover has a curved surface, a plurality of flow equalizing holes are arranged on the curved surface, and the distance between the curved surface and the gas-dividing flow equalizing plate is gradually increased from the center of the flow equalizing cover to the edge.
In one embodiment, the porous medium layer comprises an outer porous medium layer and an inner porous medium layer, the outer porous medium layer is arranged outside the inner porous medium layer in a ring manner, and the outer porous medium layer and the inner porous medium layer are separated by a separation cylinder;
one end face of the separation barrel is attached to the gas-dividing flow-equalizing plate, and a fire transmission channel which is communicated with the outer porous medium layer and the inner porous medium layer is arranged on the other end face of the separation barrel, which is away from the gas-dividing flow-equalizing plate.
Drawings
Fig. 1 is a schematic perspective view of a burner according to an embodiment of the application.
Fig. 2 is an exploded view of a gas distribution apparatus according to an embodiment of the present application.
Fig. 3 is a cross-sectional view of a gas-dividing and flow-equalizing plate according to an embodiment of the present application.
Fig. 4 is a cross-sectional view of a burner provided in an embodiment of the present application.
Fig. 5 is an enlarged partial schematic view of the heat sensitive return member of fig. 4 before extension.
Fig. 6 is an enlarged view of a portion of the heat sensitive return member of fig. 4 after extension.
Fig. 7 is an exploded view of a burner body according to an embodiment of the present application.
Fig. 8 is a schematic perspective view of a flow equalizing cover according to an embodiment of the present application.
Fig. 9 is a simplified schematic diagram of a flow equalizing cover and a flow equalizing plate according to an embodiment of the present application.
Reference numerals:
1. a blower; 2. a gas dividing device; 201. a base; 202. a flow equalizing cover; 203. a gas cartridge; 204. a heat-sensitive reset member; 205. a blocking member; 206. a gas-dividing and flow-equalizing plate; 207. a gasket; 2021. a central flow equalizing hole; 2022. edge flow equalizing holes; 2023. a cambered surface; 2031. a mounting groove; 2051. a gas blocking bump; 2052. an inner annulus; 2061. an inner through-flow hole; 2062. an outer through-flow hole; 2063. a limit ring; 2064. a bottom surface; 3. a burner body; 301. a burner sleeve; 302. a pressing cover; 303. a separation barrel; 304. an outer porous dielectric layer; 305. a heat-insulating refractory cylinder; 306. an inner porous dielectric layer; 3031. a fire transfer channel; 4. an ignition needle.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that, if any, these terms "center", "length", "height", "upper", "lower", "top", "bottom", "inner", "outer", "radial", "circumferential", etc., are used, these terms refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" a second feature, etc., is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature.
It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "upper", "lower", and the like, as used herein, are for illustrative purposes only and are not meant to be the only embodiments.
As a novel combustion technology, the porous medium combustion technology has the advantages of high combustion rate, good combustion stability, large load adjusting range, large volume heat intensity, small burner volume, good gas adaptability, low pollutant emission in flue gas, wide combustion limit, low combustible gas consumption heat value and the like.
However, in the heating process of the porous medium burner, the temperature of the porous medium increases due to heat accumulation, radiation effect and the like, so that the temperature of the mixed gas passing through the porous medium increases. When the temperature rises to the threshold value, namely the temperature of the air inlet end of the porous medium reaches the ignition point of the mixed gas, the mixed gas which does not enter the porous medium is ignited, so that the problem of tempering is caused, and potential safety hazards exist.
For this reason, a remedy is often adopted in the related art, which includes blocking tempering with a fire-blocking net or controlling the combustion state to lower the temperature below a threshold value. The method of blocking by using the fire-retarding net has small overflow area, which is easy to cause the problem of insufficient supply of mixed gas and affects the combustion efficiency. The method for reducing the temperature to below the threshold value by controlling the combustion state comprises the following steps: the flame is weakened, so that the temperature of the porous medium is reduced, the flame is weakened usually by adjusting the flow area of the fire hole, but the shape of the flame is changed along with the adjustment of the flow area by adjusting the flow area of the fire hole, and the flame with the changed shape sometimes cannot meet the heating requirement of part.
In order to be able to prevent tempering without affecting normal use. In some embodiments of the present application, referring to fig. 1, fig. 1 shows a schematic perspective view of a burner in an embodiment of the present application. The present application provides a burner comprising: fan 1, gas distributor 2 and combustor 3. Wherein, the combustor body 3 is equipped with the combustion chamber in, and the combustion chamber is built-in to have porous medium layer, has seted up a plurality of fire holes on the porous medium layer, and porous medium layer includes inlet end and outlet end. The gas distribution device 2 is arranged between the fan 1 and the burner body 3, and the gas distribution device 2 is arranged at the gas inlet end of the porous medium layer. Referring to fig. 2, fig. 2 shows an exploded schematic view of a gas distribution apparatus according to an embodiment of the present application. The gas distributing device 2 comprises a thermosensitive resetting piece 204, a plugging piece 205 and a gas distributing and flow equalizing plate 206, wherein the gas distributing and flow equalizing plate 206 is arranged between the plugging piece 205 and a porous medium layer, a plurality of through holes are distributed on the gas distributing and flow equalizing plate 206 and are communicated with the combustion chamber, mixed gas passing through the through holes on the gas distributing and flow equalizing plate 206 enters the combustion chamber, the porous medium layer is immersed in the mixed gas in the combustion chamber, and finally the mixed gas in the fire holes of the porous medium layer can be ignited. The thermal reset piece 204 is connected with the blocking piece 205, when the temperature in the combustor rises to a threshold value, the thermal reset piece 204 stretches and drives the blocking piece 205 to block the through holes on the upper part of the gas distribution flow equalization plate 206. The fan 1 is used for supplying air to the burner body 3, the air current supplied by the fan 1 is sent into the burner body 3 through the air dividing device 2, and the fan 1 is connected to the air inlet of the air dividing device 2. The air pressure in the burner body 3 is increased through the fan 1, so that the air flow speed in the burner body 3 is high, and the mixed gas can be sent to the other end of the porous medium layer far away from the gas separation device 2 through the fire hole more quickly, so that the mixed gas is sufficiently supplied, and the mixed gas can be combusted normally on the porous medium layer.
In this scheme, the air flow passes through the through holes on the air-dividing and flow-equalizing plate 206 to achieve the purpose of dividing, so that the air flow discharged from the air-dividing and flow-equalizing plate 206 is divided into multiple small air flows and sent into different areas of the porous medium layer. By blocking the through holes on the upper part of the air-separating and flow-equalizing plate 206, the flow-passing area of the air flow passing through the air-separating and flow-equalizing plate 206 is reduced, and on the premise that the air flow supplied by the fan 1 is unchanged, the flow-passing area is reduced, so that the flow speed of the air flow passing through the unblocked through holes is faster, and the cooling effect of the air flow on the porous medium layer is effectively increased. In addition, the flow speed of the air flow on the air-dividing and flow-equalizing plate 206 is increased, so that the flow speed of the air flow on the porous medium layer is correspondingly increased, the propagation direction of the flame in the porous medium layer is opposite to the flow of the air flow, and when the flow speed of the air flow is increased, the difference value between the air flow speed and the flame propagation speed is increased, so that the flame is prevented from propagating to one end of the porous medium layer, which is close to the air-dividing and flow-equalizing plate 206, and the purpose of preventing backfire is further realized.
Further, the thermal reset element 204 is at least alternately changed at a temperature threshold, that is, when the temperature is lower than the threshold, the thermal reset element 204 is in a first state, the blocking element 205 is located at a position far away from the through-flow hole, and when the temperature is not lower than the threshold, the thermal reset element 204 is in a second state, and the thermal reset element 204 drives the blocking element 205 to block the through-flow hole. It can be understood that the thermal reset element 204 may be a driving element controlled by a thermal sensor and a heat sensitive sensor, the temperature is detected by the thermal sensor, the driving element is controlled to drive the blocking element 205, and the thermal reset element may also be a memory metal, when the temperature reaches a threshold value, reset deformation occurs in the memory metal, for example, a thermal spring, and when the environmental temperature where the thermal spring is located reaches the threshold value, the thermal spring rebounds, so that the thermal spring stretches to drive the blocking element 205 to move. Alternatively, the heat sensitive spring may be gradually stretched as the temperature increases, or may be released to complete stretching immediately after a threshold is reached. Meanwhile, when the temperature of the porous medium layer does not reach the threshold value of tempering risk, the heat-sensitive spring can drive the blocking piece 205 to be far away from the through hole through resetting so as to increase the overcurrent area, thereby ensuring the combustion of fuel gas in the porous medium layer and avoiding fire or insufficient combustion.
The gas distributing device 2 further comprises a gas distributing cylinder 203, a blocking piece 205 and a gas distributing and flow equalizing plate 206 are arranged between the gas distributing cylinder 203 and the burner body 3, and a heat sensitive spring is arranged between the blocking piece 205 and the gas distributing cylinder 203. Specifically, the gas-dividing and flow-equalizing plate 206 is mounted on the gas-dividing cylinder 203. The heat-sensitive spring and the blocking piece 205 are positioned in the gas cylinder 203, one end of the heat-sensitive spring is connected with the gas cylinder 203, the other end of the heat-sensitive spring is connected with the blocking piece 205, and the blocking piece 205 is driven to be close to or far away from the gas distribution flow equalizing plate 206 through the extension or the resetting of the heat-sensitive spring.
Referring to fig. 4, fig. 4 shows a cross-sectional view of a burner in an embodiment of the application. In this scheme, the thermosensitive reset piece 204 drives the blocking piece 205 to move along the axial direction of the through hole, so that the blocking piece 205 gradually approaches the gas-distributing and flow-equalizing plate 206. Specifically, with reference to fig. 5, fig. 5 is an enlarged partial schematic view of the thermosensitive reset member shown in fig. 4 a before extension. When the thermal reset element 204 is in a low temperature state, the thermal reset element 204 is contracted to a length L 1 . Referring to fig. 6, fig. 6 is an enlarged partial schematic view of the heat sensitive restoring member of fig. 4 a after being extended. When the thermal reset element 204 reaches the threshold value, the thermal reset element 204 elastically returns to extend the thermal reset element 204 to a length L 2 。L 2 And L is equal to 1 The difference between (a) and (b) is the travel distance of the movement of the closure 205. Illustratively, the threshold is a temperature of the porous media layer near the end of the gas distribution flow equalization plate 206 up to about 250 ℃.
In some embodiments of the present application, the gas-dividing and flow-equalizing plate 206 is attached to the porous medium layer, and the through holes are in one-to-one correspondence with the fire holes on the porous medium layer. When the blocking piece 205 blocks part of the through holes, the fire holes corresponding to the blocked through holes are not supplied with mixed gas, and the ignition objects are cut off in the blocked through holes and the corresponding fire holes, so that flames are difficult to spread, and tempering is prevented.
Further, as shown in fig. 3 and 4, fig. 3 shows a cross-sectional view of the gas-dividing and flow-equalizing plate in an embodiment of the present application. The porous dielectric layers include an outer porous dielectric layer 304 and an inner porous dielectric layer 306, the outer porous dielectric layer 304 being sleeved outside the inner porous dielectric layer 306. The outer porous medium layer 304 and the inner porous medium layer 306 are separated by a separator 303, and the separator 303 is made of a lightweight heat-insulating refractory material, such as alumina. Thermal energy transfer between the outer porous dielectric layer 304 and the inner porous dielectric layer 306 is limited by the barrier 303 to prevent thermal stress concentration problems.
The through-holes on the gas-dividing and flow-equalizing plate 206 include an inner through-hole 2061 and an outer through-hole 2062, the outer through-hole 2062 corresponding to the fire holes of the outer porous medium layer 304, and the inner through-hole 2061 corresponding to the fire holes of the inner porous medium layer 306. One end of the barrier 303 is abutted against the gas-distributing and flow-equalizing plate 206, so that the barrier 303 is also located between the inner through-flow holes 2061 and the outer through-flow holes 2062, and the mixed gas output from the inner through-flow holes 2061 and the outer through-flow holes 2062 is restricted from flowing through each other by the barrier 303, so that the mixed gas output from the inner through-flow holes 2061 and the outer through-flow holes 2062 are respectively and independently supplied to the inner porous medium layer 306 and the outer porous medium layer 304.
In practical use, the flow rate of the air flow is found to be faster when the air flow is closer to the center, the air flow passes through the air distribution plate 206, and the mixed gas output from the air distribution device 2 is converged towards the center due to the difference of the flow rates, so that the amount of the gas in the fire holes at the edge is small, and in the scheme, the amount of the mixed gas of the outer porous medium layer 304 is small, and in order to avoid the convergence of the mixed gas, the flow of the mixed gas output from the inner porous medium layer 306 and the outer porous medium layer 304 is limited by the separation barrel 303 in the scheme, so that the amount of the mixed gas in the outer porous medium layer 304 is ensured.
Specifically, the burner body 3 further includes a burner sleeve 301 and a compression cover 302, the porous medium layer is contained in the burner sleeve 301, a heat insulation refractory cylinder 305 is filled between the porous medium layer and the burner sleeve 301, the heat insulation refractory cylinder 305 plays a role in insulating the porous medium layer, heat energy in the porous medium layer is limited to be diffused to the burner sleeve 301, and the temperature on the burner sleeve 301 is reduced, so that the risk that a user is scalded by the burner sleeve 301 is reduced. The pressure cap 302 is disposed at an end of the porous medium layer facing away from the gas distribution flow equalization plate 206, and the pressure cap 302 is connected to the burner sleeve 301, and both flame and mixed gas can pass through the pressure cap 302.
Referring to fig. 7, fig. 7 shows an exploded view of a burner body in an embodiment of the application. The burner further comprises an ignition needle 4, the ignition needle 4 being used for igniting the mixed gas of the porous medium layer. The ignition needle 4 is arranged at the other end of the porous medium layer provided with fire holes, namely, the ignition needle 4 is arranged on the compression cover 302. However, the outer porous medium layer 304 and the inner porous medium layer 306 are separated by the separating tube 303, and a single ignition needle 4 can only ignite the outer porous medium layer 304 or the inner porous medium layer 306, so that fire transfer between the outer porous medium layer 304 and the inner porous medium layer 306 is difficult to realize. For this reason, in this embodiment, the fire transfer channel 3031 is provided on the end of the barrier 303 near the compression cover 302, so that the flames on the outer porous medium layer 304 and the inner porous medium layer 306 can be transferred to each other conveniently, so that the single ignition needle 4 can ignite the mixed gas on the outer porous medium layer 304 and the inner porous medium layer 306 at the same time.
Further, as shown in fig. 1, 5 and 6, the blocking member 205 includes an annular body, and the body of the blocking member 205 is disposed corresponding to the outer porous medium layer 304. The thermal reset element 204 is connected to the main body, and the thermal reset element 204 can drive the main body to fit on the outer porous medium layer 304. The annular end surface of the main body is provided with a convex air blocking lug 2051, and the air blocking lug 2051 corresponds to the outer through hole 2062. When the body is attached to the gas distribution and equalization plate 206, the gas blocking bump 2051 can be embedded within the outer through-flow aperture 2062 to block the outer through-flow aperture 2062.
More specifically, as shown in fig. 3, the gas-dividing and flow-equalizing plate 206 can be provided with a raised stopper 2063 on a surface that contacts the blocking piece 205, the stopper 2063 being disposed between the inner and outer through-flow holes 2061, 2062. When the plugging piece 205 approaches the gas-distributing and flow-equalizing plate 206, the plugging piece main body can be sleeved on the limit ring 2063. The annular closure body includes an inner annular surface 2052, the inner annular surface 2052 being affixed to the outside of the stop collar 2063. The blocking piece 205 is guided to move by the limit ring 2063, so that the blocking piece 205 and the gas distribution flow equalization plate 206 are prevented from being misplaced, the blocking convex block 2051 is aligned with the outer through hole 2062, and the tightness of the blocking convex block 2051 blocked in the outer through hole 2062 is improved. Illustratively, the position of the stop ring 2063 corresponds to the spacer 303.
In some embodiments of the present application, as shown in fig. 2 and 4, the gas distributing device 2 further includes a base 201 and a flow equalizing cover 202, where the base 201 is connected with the gas distributing cylinder 203 to form a container provided with the flow equalizing cover 202, the heat sensitive reset piece 204, the plugging piece 205 and the gas distributing flow equalizing plate 206. The base 201 is provided with an air inlet, the air distributing cylinder 203 is provided with an air outlet, the air inlet is connected with the fan 1, and the air outlet is connected with the burner body 3. The flow equalizing cover 202 is disposed between the gas dividing and equalizing plate 206 and the gas inlet. The air flow formed by the fan 1 sequentially passes through the flow equalizing cover 202, the air dividing and equalizing plate 206 and the porous medium layer. The flow equalizing cover 202 is provided with a plurality of flow equalizing holes, and the air flow is split after passing through the flow equalizing holes of the flow equalizing cover 202 and the through holes of the air dividing and equalizing plate 206, so that the air fed into the porous medium layer is more uniform.
The center air pressure at the air outlet of the fan 1 is high, so that when the air flows through the flow equalizing cover 202 and the air dividing and equalizing plate 206, the positions of the flow equalizing cover 202 and the air dividing and equalizing plate 206, which are closer to the centers of the air dividing and equalizing plate, bear larger air flows, and the fire holes, which are correspondingly closer to the centers of the flow equalizing cover 202 and the air dividing and equalizing plate 206, are burnt more severely. In order to ensure the uniformity of the combustion of the porous medium layer, the gas needs to be dispersed to the periphery, so that the gas can be uniformly distributed on the plane of the gas inlet of the gas cylinder 203.
In order to be able to make the gas fed into the porous medium layer more uniform. In an embodiment, referring to fig. 8 and 9, fig. 8 is a schematic perspective view of a flow equalizing cover according to an embodiment of the present application, and fig. 9 is a simplified schematic view of a flow equalizing cover and a gas-dividing flow equalizing plate according to an embodiment of the present application. The aperture of the flow equalizing hole gradually increases along the direction from the center of the flow equalizing cover 202 to the edge, i.e., the aperture of the flow equalizing hole gradually increases along the radial direction. Specifically, the flow equalizing hole located at the center of the flow equalizing cover 202 is a central flow equalizing hole 2021, the flow equalizing hole located at the edge of the flow equalizing cover 202 is an edge flow equalizing hole 2022, and the aperture of the central flow equalizing hole 2021 is brave 1 The aperture of the edge flow equalizing hole 2022 is brave 2 ，ø 1 <ø 2 . In this embodiment, the smaller the area for the air flow passing through the center of the flow equalizing cover 202, and the larger the flow passage pressure drop, so that the mixed gas with high flow velocity in the center area is decelerated; along the central to peripheral edges, the pore diameter gradually increases so that the area of the air supply flow gradually increases, and the flow pressure dropThe flow rate of the low-flow-rate fluid at the edge of the air flow is reduced to keep the original flow rate passing through the edge flow equalizing holes 2022 as much as possible, so that the flow rate of the mixed gas passing through the flow equalizing cover 202 is adjusted by adjusting the flow rate of the mixed gas passing through the flow equalizing holes at different positions, so that the air flow passing through the flow equalizing cover 202 is more uniform. The uniformly-split mixed gas enters the porous medium layer, is preheated and combusted in the porous medium layer, so that the flame fills the whole porous medium layer, no combustion dead angle exists, and the uniform combustion temperature is ensured.
In another embodiment, the flow equalizing cover 202 has an arc surface 2023 protruding toward the gas-dividing flow equalizing plate 206, the flow equalizing holes are disposed on the arc surface 2023, and the distance between the arc surface 2023 and the gas-dividing flow equalizing plate 206 gradually expands along the radial direction from the center to the edge of the flow equalizing cover 202. Specifically, the gas-dividing and flow-equalizing plate 206 includes a bottom surface 2064 adjacent to the flow-equalizing cover 202, and the center of the flow-equalizing cover 202 is spaced from the bottom surface 2064 by a distance h 1 The distance between the edge of the flow equalizing cover 202 and the bottom surface 2064 is h 2 ，h 1 <h 2 . The reason why the spherical flow equalizing cover 202 can make the air flow entering the porous medium layer more uniform is that the flow rate of the mixed gas sent out from the middle part of the flow equalizing cover 202 is larger than the flow rate of the mixed gas sent out from the edge of the flow equalizing cover 202, so that the mixed gas at the edge can be close to the middle part under the action of air pressure. The flow equalizing cover 202 is arranged in an upward protruding arc shape, so that part of the flow equalizing cover 202 is closer to the gas flow equalizing plate 206, and the edge mixed gas flows to the channel h in the middle 1 The narrowing can prevent the air flow from flowing to the middle part, and reduce the flow of the mixed gas flowing from the edge to the middle part, so that the mixed gas is uniformly distributed.
Preferably, in this embodiment, the flow equalizing cover 202 has a spherical curved surface structure, and the flow equalizing holes with gradually increasing diameters in the radial direction are disposed on the curved surface 2023. In this scheme, because the aperture of the flow equalizing hole gradually increases along the radial direction, the difference between the airflow velocity near the center of the flow equalizing cover 202 and the airflow velocity near the edge is smaller, so the adsorption force of the mixed gas at the edge to the center of the flow equalizing cover 202 is smaller, and meanwhile, the mixed gas at the edge is simultaneously blocked by the spherical curved surface, so that the mixed gas at the edge is more difficult to flow to the middle, and the mixed gas distribution is more uniform.
The amount of gas passing through the through-flow aperture is related to the flow area and the gas flow velocity, and the amount of gas is proportional to the flow area and the gas flow velocity. In this embodiment, the aperture of the outer through-flow hole 2062 is larger than the aperture of the inner through-flow hole 2061, the flow area of the outer through-flow hole 2062 is larger than the flow area of the inner through-flow hole 2061, and the flow rate of air passing through the outer through-flow hole 2062 is smaller than the flow rate of air passing through the inner through-flow hole 2061, so that the amount of air passing through the outer through-flow hole 2062 is closer to the amount of air passing through the inner through-flow hole 2061, thereby making the mixed gas in the outer porous medium layer 304 and the inner porous medium layer 306 more uniform.
Further, as shown in fig. 5 and 6, an annular boss is provided on the inner wall of the gas cylinder 203, a mounting groove 2031 is provided on the boss, the thermal reset member 204 is installed in the mounting groove 2031, and a portion of the blocking member 205 is located in the mounting groove 2031, specifically, an inner annular surface 2052 is attached to the inner wall surface of the mounting groove 2031, and the movement direction of the blocking member 205 towards the gas-distributing and flow-equalizing plate 206 is limited by the mounting groove 2031, so that the position accuracy of the blocking member 205 and the gas-distributing and flow-equalizing plate 206 is improved.
Further, when the gas-distributing and flow-equalizing plate 206 is mounted on the gas-distributing cylinder 203, a gasket 207 is further disposed between the gas-distributing and flow-equalizing plate 206 and the gas-distributing cylinder 203, and the gasket 207 can ensure the tightness between the gas-distributing and flow-equalizing plate 206 and the gas-distributing cylinder 203 to prevent the leakage of the gas flow from between the gas-distributing and flow-equalizing plate 206 and the gas-distributing cylinder 203.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A burner, comprising:
the burner comprises a burner body (3), wherein a combustion chamber is arranged in the burner body, a porous medium layer is arranged in the combustion chamber, and a plurality of fire holes are formed in the porous medium layer; and
the gas distribution device (2), gas distribution device (2) set up the inlet end of combustor body (3), gas distribution device (2) include thermal reset piece (204), shutoff piece (205) and divide gas flow equalizing plate (206), thermal reset piece (204) are thermal spring, shutoff piece (205) are including being annular main part and protruding locating a plurality of shutoff convex blocks (2051) of annular terminal surface of main part, divide gas flow equalizing plate (206) with the inlet end of combustor body (3) is connected, divide and set up a plurality of through-flow holes on flow equalizing plate (206), through-flow hole with the combustion chamber intercommunication, shutoff piece (205) set up in divide gas flow equalizing plate (206) to deviate from one side of porous medium layer, thermal reset piece (204) with shutoff piece (205) are connected, thermal reset piece (204) can drive when the temperature in the combustor is greater than threshold value a plurality of shutoff convex blocks (206) of shutoff piece (205) are passed through on the shutoff hole.
2. The burner according to claim 1, wherein the gas-dividing and flow-equalizing plate (206) is disposed in close contact with the gas inlet end face of the porous medium layer, and the through-flow holes are in corresponding communication with the fire holes.
3. The burner according to claim 1, wherein the gas distribution device (2) further comprises a gas distribution cylinder (203), the blocking piece (205) and a gas distribution flow equalization plate (206) being arranged between the gas distribution cylinder (203) and the burner body (3); the heat-sensitive spring is connected between the blocking piece (205) and the gas cylinder (203), and can stretch along with the temperature rise so as to drive the blocking piece (205) to approach the gas-distributing and flow-equalizing plate (206).
4. A burner according to any one of claims 1-3, characterized in that the through-flow holes comprise inner through-flow holes (2061) and outer through-flow holes (2062), a plurality of the inner through-flow holes (2061) being arranged in a central portion of the gas-dividing and flow-equalizing plate (206), a plurality of the outer through-flow holes (2062) being arranged circumferentially outside all the inner through-flow holes (2061), the outer through-flow holes (2062) having a larger pore size than the inner through-flow holes (2061).
5. The burner according to claim 4, wherein a plurality of said air shutoff projections (2051) are capable of being embedded in a plurality of said outer through-flow holes (2062) in a one-to-one correspondence to block a plurality of said outer through-flow holes (2062).
6. The burner according to claim 5, characterized in that a limit ring (2063) is arranged on the surface of the gas-dividing flow-equalizing plate (206) facing the plugging piece (205) in a protruding manner, and the limit ring (2063) is arranged between the inner through-flow hole (2061) and the outer through-flow hole (2062) in a surrounding manner;
the main body can be sleeved on the periphery of the limit ring (2063).
7. The burner of claim 4, wherein the gas distributing device (2) further comprises a flow equalizing cover (202), the flow equalizing cover (202) is arranged between the gas distributing and equalizing plate (206) and the gas inlet of the gas distributing device (2), and a plurality of flow equalizing holes are formed in the flow equalizing cover (202).
8. The burner of claim 7, wherein the apertures of the plurality of flow equalization holes gradually increase in a direction from the center to the edge of the flow equalization cap (202).
9. The burner according to claim 8, wherein the flow equalizing cover (202) has a curved surface (2023), a plurality of the flow equalizing holes are provided on the curved surface (2023), and a distance between the curved surface (2023) and the gas-dividing flow equalizing plate (206) gradually increases from a center to an edge of the flow equalizing cover (202).
10. The burner according to claim 1, characterized in that the porous medium layer comprises an outer porous medium layer (304) and an inner porous medium layer (306), the outer porous medium layer (304) being arranged around the inner porous medium layer (306), and the outer porous medium layer (304) and the inner porous medium layer (306) being separated by a spacer (303);
one end face of the separation barrel (303) is attached to the gas-separating and flow-equalizing plate (206), and a fire transmission channel (3031) for communicating the outer porous medium layer (304) and the inner porous medium layer (306) is formed in the other end face, away from the gas-separating and flow-equalizing plate (206), of the separation barrel (303).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310797737.XA CN116518370B (en) | 2023-07-03 | 2023-07-03 | Burner with a burner body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310797737.XA CN116518370B (en) | 2023-07-03 | 2023-07-03 | Burner with a burner body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116518370A CN116518370A (en) | 2023-08-01 |
| CN116518370B true CN116518370B (en) | 2023-10-10 |
Family
ID=87403304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310797737.XA Active CN116518370B (en) | 2023-07-03 | 2023-07-03 | Burner with a burner body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116518370B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130023792A (en) * | 2011-08-30 | 2013-03-08 | 린나이코리아 주식회사 | Apparatus for preventing over-heating for gas range |
| CN108458119A (en) * | 2018-02-05 | 2018-08-28 | 信阳师范学院 | Gas flow control device, method and system |
| CN208222507U (en) * | 2018-05-17 | 2018-12-11 | 广州市蓝炬能源科技有限公司 | A kind of fireproof tempering device |
| CN212377968U (en) * | 2020-04-03 | 2021-01-19 | 宁波方太厨具有限公司 | Nozzle for gas stove ejector |
| CN114935146A (en) * | 2022-04-11 | 2022-08-23 | 西安交通大学 | Flow-equalizing porous medium burner and working method thereof |
| CN218442421U (en) * | 2022-10-09 | 2023-02-03 | 武汉港智厨房设备制造有限公司 | Furnace end of energy-saving gas furnace |
-
2023
- 2023-07-03 CN CN202310797737.XA patent/CN116518370B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130023792A (en) * | 2011-08-30 | 2013-03-08 | 린나이코리아 주식회사 | Apparatus for preventing over-heating for gas range |
| CN108458119A (en) * | 2018-02-05 | 2018-08-28 | 信阳师范学院 | Gas flow control device, method and system |
| CN208222507U (en) * | 2018-05-17 | 2018-12-11 | 广州市蓝炬能源科技有限公司 | A kind of fireproof tempering device |
| CN212377968U (en) * | 2020-04-03 | 2021-01-19 | 宁波方太厨具有限公司 | Nozzle for gas stove ejector |
| CN114935146A (en) * | 2022-04-11 | 2022-08-23 | 西安交通大学 | Flow-equalizing porous medium burner and working method thereof |
| CN218442421U (en) * | 2022-10-09 | 2023-02-03 | 武汉港智厨房设备制造有限公司 | Furnace end of energy-saving gas furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116518370A (en) | 2023-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017088590A1 (en) | Inner annular flame distributor and gas stove | |
| US4510890A (en) | Infrared water heater | |
| JPH0755151A (en) | Gas cooking assembly with gas burner arranged below continuous cooking board which is made of heat radiation permeable material like glass-ceramics | |
| CN116518370B (en) | Burner with a burner body | |
| CN214275834U (en) | Gas stove | |
| CN111256126A (en) | Burner for gas stove | |
| CN217423595U (en) | Heating device and gas water heater | |
| CN111878811A (en) | Three-return-stroke vertical gas boiler | |
| US4470798A (en) | Method of operating a burner without using a fuel pump, and burner assembly operating in accordance with such method | |
| CN212565767U (en) | Burner and gas water heater | |
| US1943045A (en) | Thermostatic gas burner | |
| MX2007009720A (en) | Low nox pilot burner and associated method of use. | |
| TWI662231B (en) | Wind-resistant outdoor stove combustion device | |
| US4480629A (en) | Gas furnace system | |
| KR100260226B1 (en) | A high calory burner | |
| CN221237863U (en) | Cold flame full-premix combustion device and gas heating water heater | |
| CN221526596U (en) | Full premix combustor and gas equipment | |
| CN214370172U (en) | Low-nitrogen gas burner for vertical furnace | |
| CN220135461U (en) | Sectional type combustion mechanism | |
| CN211372406U (en) | Completely upper air inlet type burner | |
| JP2000314509A (en) | Burner | |
| US4474551A (en) | Combustion apparatus | |
| US3173471A (en) | Flare-type pilot burner | |
| CN2370281Y (en) | Multiple step regulating sheet control burner assembly | |
| CN206094087U (en) | Pipeline formula heating natural gas burner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |