CN202852821U - Anti-backfire preventer - Google Patents
Anti-backfire preventer Download PDFInfo
- Publication number
- CN202852821U CN202852821U CN 201220434375 CN201220434375U CN202852821U CN 202852821 U CN202852821 U CN 202852821U CN 201220434375 CN201220434375 CN 201220434375 CN 201220434375 U CN201220434375 U CN 201220434375U CN 202852821 U CN202852821 U CN 202852821U
- Authority
- CN
- China
- Prior art keywords
- backfire controller
- backfire
- outlet nozzle
- fire
- cooling fluid
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Gas Burners (AREA)
Abstract
The utility model discloses an anti-backfire preventer which comprises an anti-backfire preventer body respectively arranged an air inlet nozzle and an air outlet nozzle on the both sides. The anti-backfire preventer body is provided with the air inlet nozzle and the air outlet nozzle which are communicated, and an inflaming retarding cavity of a fire-retardance body is arranged inside. A cone-shaped containing cavity is arranged in the part between the air outlet nozzle and the inflaming retarding cavity on the anti-backfire preventer body, and one end with the bigger cross sectional area of the cone-shaped containing cavity is close to the air outlet nozzle. A cone-shaped non-return body fitted with the cone-shaped containing cavity is arranged inside the cone-shaped containing cavity. A channel communicated with the air outlet nozzle and the inflaming retarding cavity is formed between an outer wall of the cone-shaped non-return body and an inner wall of the cone-shaped containing cavity under promoting by air currents with setting pressure. The anti-backfire preventer has the advantages of increasing effects of anti-backfire.
Description
Technical field
The utility model relates to anti-backfire device design technical field, relates in particular to preferably backfire controller of a kind of anti-backfire effect.
Background technology
Tempering is a kind of malcombustion phenomenon that fuel gas occurs in the process of burning, is in particular in that combustion flame burns along gas pipeline towards the source of the gas direction.For example the acetylene burning torch because of the misoperation meeting so that acetylene and oxygen along pipeline towards the acetylene gas source side to burning, for example the Rack of very deafening bang can appear in automobile in the process of exercising again, this is that the blast pipe tempering phenomenon causes.In a word, because combustion flame can cause burning towards the direction burning of source of the gas carries out in limited space, so tempering often causes either large or small blast vibrations to occur, this causes equipment stably to work in the process of tempering.
Tempering is the unwanted combustion phenomenon of fuel gas in the equipment course of work, therefore prevents necessitating of tempering phenomenon, and then is intended to prevent that the backfire controller that tempering phenomenon occurs from arising at the historic moment.Existing backfire controller is generally filled resistance fire material and is stoped combustion flame towards the spreading of source of the gas direction, thereby stops the generation of tempering, the steel wire that resistance fire material is commonly used etc.The groundwork principle of existing backfire controller is by cutting off the tempering combustion flame, stop it to spread finally to reach and extinguish back fire flame and then reach anti-backfire purpose, but we can find out, existing backfire controller is only merely from stoping the back fire flame approach axis to be started with, but source of the gas does not stop the supply of fuel gas when tempering phenomenon produces, and then causes after the upper back fire flame of source of the gas docking so that tempering phenomenon continues to recur.Therefore, the anti-backfire poor effect of existing backfire controller has affected the normal operation of equipment.
Therefore, how improving the anti-backfire effect of existing backfire controller, is the technical problem that present those skilled in the art need to be resolved hurrily.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of backfire controller, to improve the anti-backfire effect of existing backfire controller.
In order to achieve the above object, the utility model provides following technical scheme:
A kind of backfire controller comprises that two ends are respectively arranged with the backfire controller body of suction nozzle and outlet nozzle, and described backfire controller body has the described suction nozzle of connection and outlet nozzle, and the fire-retardant chamber of built-in back-fire relief body; Position on the described backfire controller body between described outlet nozzle and described fire-retardant chamber is provided with the taper accommodating cavity, and the close described outlet nozzle of the end that its cross-sectional area is larger, be provided with the taper non-return body adaptive with described taper accommodating cavity in the described taper accommodating cavity, under the air-flow of setting pressure promotes, form the passage that is communicated with described outlet nozzle and described fire-retardant chamber between the outer wall of described taper non-return body and the described taper accommodating cavity inwall.
Preferably, in the above-mentioned backfire controller, comprise that also an end is positioned on the described outlet nozzle, the other end is connected on the described taper non-return body end relative with described outlet nozzle the thrust elastic component with the power that applies described taper accommodating cavity inwall.
Preferably, in the above-mentioned backfire controller, described thrust elastic component is Compress Spring.
Preferably, in the above-mentioned backfire controller, be provided with locating dowel in the described outlet nozzle, described taper non-return body is provided with storage tank, and described Compress Spring is set on the described locating dowel and places described storage tank.
Preferably, in the above-mentioned backfire controller, also comprise being set in described backfire controller body exterior, and form the overcoat in liquid cools chamber with described backfire controller body outer wall, be provided with cooling fluid access port and cooling fluid outlet on it.
Preferably, in the above-mentioned backfire controller, described cooling fluid access port and cooling fluid outlet are separately positioned on the both sides of the axis of described overcoat, and the close described suction nozzle of described cooling fluid access port, and described cooling fluid outlet is near described outlet nozzle.
Preferably, in the above-mentioned backfire controller, be provided with fin or needle-like radiating part on the radiating surface of described backfire controller body outer wall and described overcoat.
Preferably, in the above-mentioned backfire controller, described overcoat is copper overcoat, and is coated with the chromium layer on the outer surface of described overcoat.
Preferably, in the above-mentioned backfire controller, described back-fire relief body is the foam chromium back-fire relief body with hole.
Preferably, in the above-mentioned backfire controller, described back-fire relief body is fine-celled foam chromium back-fire relief body.
The backfire controller that the utility model provides comprises that two ends are respectively arranged with the backfire controller body of suction nozzle and outlet nozzle, and described backfire controller body has the described suction nozzle of connection and outlet nozzle, and the fire-retardant chamber of built-in back-fire relief body; Position on the described backfire controller body between described outlet nozzle and described fire-retardant chamber is provided with the taper accommodating cavity, and the close described outlet nozzle of the end that its cross-sectional area is larger, be provided with the taper non-return body adaptive with described taper accommodating cavity in the described taper accommodating cavity, under the source of the gas air-flow of setting pressure promotes, form the passage that is communicated with described outlet nozzle and described fire-retardant chamber between the outer wall of described taper non-return body and the described taper accommodating cavity inwall.In the process of work, burning mixture is opened at the airflow function inferior pyramidal non-return body of setting pressure and the passage between the taper accommodating cavity inwall after by the back-fire relief body in the fire-retardant chamber from suction nozzle, and finally enter into outlet nozzle, said process has been realized the circulation of fuel gas, the tempering high temperature gas flow flows into from outlet nozzle owing to being accompanied by the blast vibrations when tempering occurring, move in the promotion inferior pyramidal non-return body of the high pressure draught direction towards pathway closure, moment is blocked the fuel gas that flows out from fire-retardant chamber, back-fire relief body in the fire-retardant chamber extinguishes the flame back-fire relief that enters into wherein simultaneously, avoid recurring of tempering, improved the anti-backfire effect of backfire controller.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of concrete structure schematic diagram of the backfire controller that Fig. 1 provides for the utility model embodiment;
The another kind of concrete structure schematic diagram of the backfire controller that Fig. 2 provides for the utility model embodiment.
Among upper Fig. 1-2:
Suction nozzle 1, back-fire relief body 2, overcoat 3, cooling fluid 4, Compress Spring 5, taper non-return body 6, cooling fluid outlet 7, cooling fluid access port 8, outlet nozzle 9, backfire controller body 10.
The specific embodiment
The utility model embodiment provides a kind of backfire controller, and existing backfire controller is improved, and has improved the anti-backfire effect of backfire controller.
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to accompanying drawing 1, a kind of concrete structure schematic diagram of the backfire controller that accompanying drawing 1 provides for the utility model embodiment.
The backfire controller that the utility model embodiment provides comprises backfire controller body 10, back-fire relief body 2 and taper non-return body 6, wherein:
Back-fire relief body 2 is made by resistance fire material, can by forming in the fire-retardant chamber that resistance fire material is pressed into backfire controller body 10, be installed in the fire-retardant chamber after also can making according to the preset shape in fire-retardant chamber;
Taper non-return body 6 is arranged in the taper accommodating cavity and is suitable with this taper accommodating cavity, forms the passage that is communicated with outlet nozzle 9 and fire-retardant chamber in the process of work between the source of the gas air-flow of setting pressure promotes the inwall of the outer wall of inferior pyramidal non-return body 6 and taper accommodating cavity.
Fuel gas enters into the fire-retardant chamber of backfire controller body 10 and passes and enters into outlet nozzle 9 by passage after washing taper non-return body 6 under the source of the gas airflow function of back-fire relief body 2 in setting pressure open by suction nozzle 1 in the process of work, thereby has finished the supply of fuel gas.When tempering phenomenon occurs when, the high temperature gas flow of tempering burning takes the lead in entering at the impact inferior pyramidal non-return body 6 of high temperature gas flow from outlet nozzle 9 and moves (namely moving towards the less end of taper accommodating cavity cross-sectional area) towards the direction of pathway closure, thereby moment is blocked the fuel gas that flows out from fire-retardant chamber, stop simultaneously back fire flame further in fire-retardant chamber, to spread, can find out that by said process 6 moments of taper non-return body block further outwards flowing out by passage of fuel gas, the back fire flame of ending simultaneously outlet nozzle 9 places play in the fire-retardant chamber, the back fire flame that the tempering initial stage scurries in the fire-retardant chamber is extinguished under the effect of back-fire relief body 2, only realize that by intercepting back fire flame anti-backfire backfire controller compares with respect to what prior art provided, the backfire controller that the utility model embodiment provides can block the outflow of fuel gas under the effect of tempering high-temperature gas when tempering occurs, intercepted simultaneously the inflow of back fire flame, the tempering that back-fire relief body 2 in the fire-retardant chamber is scurried into the tempering initial stage is extinguished, improve anti-backfire effect, realized the work that equipment is more stable.
Because it is rapider that tempering phenomenon occurs, if untimely processing tends to occur relatively more dangerous accident, The faster the better so this just requires the anti-backfire operation of backfire controller, the above has narrated taper non-return body 6 can wink add closing passage under the effect of high temperature gas flow, for so that the reaction of above-mentioned taper non-return body 6 is rapider, this backfire controller can also comprise the thrust elastic component, this thrust elastic component one end is positioned on the outlet nozzle 9, the other end is connected on the relative end of taper non-return body 6 and outlet nozzle 9, this thrust elastic component applies so that the power that taper non-return body 6 is pressed close to taper accommodating cavity inwall, the inwall of the outer wall of above-mentioned taper non-return body 6 and taper accommodating cavity fits when off working state, move so that form the circulation that passage has finally been realized fuel gas between the inwall of its outer wall and taper accommodating cavity at impact inferior pyramidal non-return body 6 under the pressure of fuel gas during work, when tempering phenomenon occurs when, at the active force of combined propulsive force elastic component under the effect of high tempering air-flow so that taper non-return body 6 more mobile with seal its with the taper accommodating cavity between the passage that forms, so above-mentioned thrust elastic component the further anti-backfire effect that has improved backfire controller is set.
Concrete, above-mentioned thrust elastic component can be Compress Spring 5, the thrust elastic component is not limited only to Compress Spring 5 certainly, can also adopt other elastic component.When above-mentioned thrust elastic component is Compress Spring 5, for so that Compress Spring 5 more stably arranges, be provided with locating dowel in the above-mentioned outlet nozzle 9, described taper non-return body 6 is provided with storage tank, and Compress Spring 5 is set on the locating dowel and as in the storage tank.
The backfire controller that provides among the utility model embodiment can prevent the tempering of various fuel gas, clean energy resource is all being greatly developed in the whole world in recent years, the Chinese government is also significantly rising in the input of energy-saving and emission-reduction industry, and strengthens the scientific research investment to the clean fuel field.Hydrogen is the energy of environmental protection, cleaning in all combustibles, and hydrogen and oxygen combustion reaction can only produce heat energy and water.Brine electrolysis is the mode of the production hydrogen and oxygen gas mixture commonly used, and China has begun to step into the large-scale production application stage in the development of the existing recent two decades of brine electrolysis preparing hydrogen oxygen gas mixture at present.Temperature reaches 800 ℃ ~ 3200 ℃ during the hydrogen and oxygen gas mixture burning, is desirable industrial fuel substitute.
Because hydrogen and oxygen gas mixture does not need additionally to provide oxygen just can burn, so will in the pipeline more rapidly auto-ignition combustion occur in case the tempering burning occurs, for this tempering situation that is similar to hydrogen and oxygen gas mixture, need to have higher requirement to backfire controller, because temperature is higher during hydrogen and oxygen gas mixture tempering burning, existingly can not satisfy the back-fire relief requirement obviously take steel wire as the back-fire relief body, the back-fire relief body 2 that provides of the utility model embodiment need to be made by more fire-resistant material for this reason, concrete can be for having the foam chromium back-fire relief body (the back-fire relief body of namely being made by foam chromium) in hole, concrete can be fine-celled foam chromium back-fire relief body, and it has better back-fire relief effect.The spontaneous combustion high temperature gas flow at first can promote taper non-return body 6 and blocks from the fuel gas of fine-celled foam chromium back-fire relief body 2 interior outflows and then stop further tempering spontaneous combustion when tempering occurs, when reaching fine-celled foam chromium back-fire relief body, extinguishes tempering initial penetration taper non-return body 6, temperature in the fire-retardant chamber is still very high at this moment, take hydrogen and oxygen gas mixture as example, this moment temperature up to 1320 ℃ ~ 2650 ℃, for fear of excess Temperature, the backfire controller that the present embodiment provides also comprises being arranged on and is set in backfire controller body 10 outsides, and the overcoat 3 with backfire controller body 10 outer walls formation liquid cools chamber, has cooling fluid 4 in the cooling chamber, be provided with cooling fluid access port 8 and cooling fluid outlet 7 on this overcoat 3, both all pass to inflow and the outflow that realizes cooling fluid mutually with the liquid cools chamber.Avoided the repeated tempering phenomenon of the excess Temperature appearance of backfire controller by the cooling of cooling fluid.
In order further to optimize technique scheme, above-mentioned cooling fluid outlet 7 and cooling fluid access port 8 are separately positioned on the both sides of the axis of overcoat 3, and this kind structure is so that cooling fluid can from an effluent of backfire controller to relative opposite side, improve cooling effect.Further, above-mentioned cooling fluid access port 8 is near suction nozzle 1, cooling fluid outlet 7 is near outlet nozzle 9, because the temperature of suction nozzle 1 is lower, cooling fluid enters from cooling fluid access port 8 to be cooled off in advance to the lower position of temperature, and the cooling fluid after then temperature raises flows to cooling fluid outlet 7, because herein near outlet nozzle 9, temperature is higher, so the cooling fluid after temperature raises still has larger heat absorption capacity, has improved the cooling effect to whole backfire controller.In order further to improve the cooling effect to backfire controller, the coolant circulation system supporting with backfire controller can be set, and accelerate the cool cycles of cooling fluid by pump.Certainly specifically can carry out in several ways the cooling of backfire controller, be not limited in above-mentioned mode.
Above-mentionedly by cooling fluid backfire controller is cooled off, in order to reach better effect, in the backfire controller in above-described embodiment, fin or needle-like radiating part all can be set on the radiating surface of the outer wall of backfire controller body 10 and described overcoat 3, improve the self-radiating function of whole backfire controller, and then reach the purpose of fast cooling, concrete, each heat-exchange surface of above-mentioned backfire controller all can arrange fin and needle-like radiating part, those skilled in the art can according to the concrete accordingly property adjusted design of applied environment situation, carefully not state at this.
All parts in the backfire controller that the present embodiment provides is high temperature resistant component, has simultaneously very high heat-sinking capability, except the improvement by structure to improve its heat sinking function, can also consider from the material aspect, preferred, above-mentioned overcoat 3 is preferably metal making of heat conductivility, concrete can be copper overcoat, backfire controller body 10 also can be made for copper material, and is preferred, can also be coated with the chromium layer on the outer surface of above-mentioned copper overcoat.In order to increase area of dissipation, the suction nozzle 1 in the backfire controller that provides in the present embodiment and the outer surface of outlet nozzle 9 can be irregular curved surface, so that suction nozzle 1 and outlet nozzle 9 have higher area of dissipation, have improved radiating efficiency in limited length.
In the backfire controller that the utility model embodiment provides, backfire controller body 10 and overcoat 3 can be integrated casting, also can be made into Split type structure and carry out additional seal when assembling.This patent is not construed as limiting the molding structure of whole backfire controller.
The utility model embodiment does not do restriction to the computer type of the concrete application of hard disk support bracket.To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, in other embodiments realization.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. backfire controller, comprise that two ends are respectively arranged with the backfire controller body (10) of suction nozzle (1) and outlet nozzle (9), described backfire controller body (10) has the described suction nozzle (1) of connection and outlet nozzle (9), and the fire-retardant chamber of built-in back-fire relief body (2); It is characterized in that, the position that is positioned on the described backfire controller body (10) between described outlet nozzle (9) and the described fire-retardant chamber is provided with the taper accommodating cavity, and the close described outlet nozzle (9) of the end that its cross-sectional area is larger, be provided with the taper non-return body (6) adaptive with described taper accommodating cavity in the described taper accommodating cavity, under the source of the gas air-flow of setting pressure promotes, form the passage that is communicated with described outlet nozzle (9) and described fire-retardant chamber between the outer wall of described taper non-return body (6) and the described taper accommodating cavity inwall.
2. backfire controller according to claim 1, it is characterized in that, comprise that also an end is positioned on the described outlet nozzle (9), the other end is connected on described taper non-return body (6) end relative with described outlet nozzle (9) the thrust elastic component with the power that applies described taper accommodating cavity inwall.
3. backfire controller according to claim 2 is characterized in that, described thrust elastic component is Compress Spring (5).
4. backfire controller according to claim 3 is characterized in that, described outlet nozzle is provided with locating dowel in (9), and described taper non-return body (6) is provided with storage tank, and described Compress Spring (5) is set on the described locating dowel and places described storage tank.
5. backfire controller according to claim 1, it is characterized in that, also comprise and be set in described backfire controller body (10) outside, and the overcoat (3) with described backfire controller body (10) outer wall formation liquid cools chamber is provided with cooling fluid access port (8) and cooling fluid outlet (7) on it.
6. backfire controller according to claim 5, it is characterized in that, described cooling fluid access port (8) and cooling fluid outlet (7) are separately positioned on the both sides of the axis of described overcoat (3), and described cooling fluid access port (8) is near described suction nozzle (1), and described cooling fluid outlet (7) is near described outlet nozzle (9).
7. backfire controller according to claim 5 is characterized in that, is provided with fin or needle-like radiating part on the radiating surface of described backfire controller body (10) outer wall and described overcoat (3).
8. backfire controller according to claim 7 is characterized in that, described overcoat (3) is copper overcoat, and is coated with the chromium layer on the outer surface of described overcoat, and described backfire controller body is made of copper.
9. the described backfire controller of any one is characterized in that according to claim 1-8, and described back-fire relief body (2) is for having the foam chromium back-fire relief body in hole.
10. backfire controller according to claim 9 is characterized in that, described back-fire relief body (2) is fine-celled foam chromium back-fire relief body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220434375 CN202852821U (en) | 2012-08-29 | 2012-08-29 | Anti-backfire preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220434375 CN202852821U (en) | 2012-08-29 | 2012-08-29 | Anti-backfire preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202852821U true CN202852821U (en) | 2013-04-03 |
Family
ID=47984014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220434375 Withdrawn - After Issue CN202852821U (en) | 2012-08-29 | 2012-08-29 | Anti-backfire preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202852821U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777916A (en) * | 2012-08-29 | 2012-11-14 | 北京中气华辰新能源技术开发有限公司 | Tempering preventing device |
| CN106500101A (en) * | 2016-12-23 | 2017-03-15 | 湖南氢时代能源科技有限公司 | A kind of dry and wet backfire controller of hydrogen oxygen energy machine |
| CN110542122A (en) * | 2019-08-31 | 2019-12-06 | 嘉兴瑛蔓贸易有限公司 | Novel sealed methane stove based on airflow |
-
2012
- 2012-08-29 CN CN 201220434375 patent/CN202852821U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777916A (en) * | 2012-08-29 | 2012-11-14 | 北京中气华辰新能源技术开发有限公司 | Tempering preventing device |
| CN106500101A (en) * | 2016-12-23 | 2017-03-15 | 湖南氢时代能源科技有限公司 | A kind of dry and wet backfire controller of hydrogen oxygen energy machine |
| CN110542122A (en) * | 2019-08-31 | 2019-12-06 | 嘉兴瑛蔓贸易有限公司 | Novel sealed methane stove based on airflow |
| CN110542122B (en) * | 2019-08-31 | 2020-12-04 | 江西发扬实业有限公司 | Methane stove sealed based on airflow |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202852821U (en) | Anti-backfire preventer | |
| CN102840029B (en) | Flame-retarded explosion-proof valve | |
| CN102777916B (en) | Tempering preventing device | |
| CN102953865B (en) | Plug cooling structure of plug type axisymmetric nozzle | |
| CN206081991U (en) | Flue gas dust removal equipment | |
| CN103542410B (en) | Heat supply fume exhaust integrated device | |
| CN102748778B (en) | Firewood-saving stove | |
| CN205279229U (en) | Swirl flame room heater | |
| CN104279564A (en) | Energy-saving stove ejector | |
| CN108346762A (en) | A kind of fire-proof and explosion-proof battery pack of electric vehicle | |
| CN204552834U (en) | A kind of turbine cooling device | |
| CN204063552U (en) | A kind of baffled hot-blast stove | |
| CN203628661U (en) | Heat supplying and smoke exhausting integrated device | |
| CN204648196U (en) | industrial vapour generator | |
| CN203980257U (en) | Biomass-burning liquid fuel fired boiler | |
| CN205117720U (en) | Single screw compressor's liquid spray device | |
| CN105240856B (en) | A kind of dry flashback arrestor | |
| CN214596897U (en) | Fire extinguishing device for lithium battery blasting of electric vehicle | |
| CN214038450U (en) | Heating furnace waste gas waste heat utilization equipment | |
| CN204554915U (en) | Clean burning stove and accessory | |
| CN204042925U (en) | The airtight burner of air cold wall type | |
| CN204026672U (en) | A kind of infrared burner | |
| CN207567265U (en) | A kind of top combustion stove | |
| CN209101304U (en) | A kind of combustion furnace for exhaust-gas treatment | |
| CN210103859U (en) | Safety device for gasifier nozzle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130403 Effective date of abandoning: 20141015 |
|
| RGAV | Abandon patent right to avoid regrant |