CN2789601Y - Explosive gas preparing apparatus - Google Patents
Explosive gas preparing apparatus Download PDFInfo
- Publication number
- CN2789601Y CN2789601Y CN 200520020724 CN200520020724U CN2789601Y CN 2789601 Y CN2789601 Y CN 2789601Y CN 200520020724 CN200520020724 CN 200520020724 CN 200520020724 U CN200520020724 U CN 200520020724U CN 2789601 Y CN2789601 Y CN 2789601Y
- Authority
- CN
- China
- Prior art keywords
- valve
- welded
- ball valve
- compressed air
- valves
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model relates to an explosive gas preparing apparatus which belongs to the technical field of a key component of a high-energy pulse gas ash-blowing system apparatus for a boiler. The utility model aims to provide an explosive gas preparing apparatus used for realizing equipment miniaturization, cost reduction and containerization. The explosive gas preparing apparatus is composed of a compressed air pipeline system, a combustible gas pipeline system and a mixing chamber, wherein the compressed air pipeline and the combustible gas pipeline are both connected with the mixing chamber. The explosive gas preparing apparatus can accomplish the mixed preparation of combustible gas and compressed air, can accurately prepare combustible and explosive mixed gas with various volume ratios, has the advantages of compact structure, small size, light weight, convenient use and operation, reliable work, system simplification, valve saving, low cost, convenient containerization and has the characteristic of accurately preparing the combustible and explosive mixed gas with various volume ratios.
Description
Technical field: the utility model relates to a kind of fuel gas and compressed air mixed preparing device, i.e. explosion gas device for formulating belongs to the critical component technical field of boiler high energy pulse combustion gas soot blower system equipment.
Background technology: the explosion gas device for formulating is the critical component of all kinds Boiler High Pressure gas-burning pulse ash-blowing system equipment, and its main application is compressed air and a kind of fuel gas to be mixed with to be in the explosion limit scope by its volume ratio be soot blower system pipeline purge or provide and deliver protection wind and provide the energy to blowing ash with interior combustion mixture; The compressed air line system that basic composition is, combustible gas pipe-line system and the mixed firing device of explosion gas device for formulating, initial compressed air line system and combustible gas pipe-line system are made up of intake valve, Pressure gauge and magnetic valve, no flowmeter, can not quantitatively determine the composition volume ratio of combustion mixture, the operator can only estimate the composition volume ratio of combustion mixture roughly only according to the pressure value of Pressure gauge indication, so, being used to blow grey energy can't accurately control at every turn; For addressing this problem, the applicant all loads onto flowmeter in compressed air line system and combustible gas pipe-line system, as metal pipe float flow meter or glass tube suspended body flowmeter or hot-wire flowmeter etc., the volume ratio of gaseous mixture can accurately be controlled, thereby improved the effect of boiler soot-blowing, in order to ensure safety, the long-life multi-storey net type spark arrester of in the combustible gas pipe-line system, having settled the applicant to design voluntarily, make the mixed firing device into mixing chamber, ignition section moves to beyond the gaseous mixture device for formulating; To the caliber of system pipeline and used valve model also carried out repeatedly reelect and perfect, be fixed to PB at last
1Be that control island and PB are regulated in distribution
2Be that the control island is regulated in the explosion-proof type distribution, have multiple back-fire relief function and explosion prevention function, the layout of structure is compact and reasonable comparatively also, and typing produces in batches, and result of use is better; But in use still find to exist following problem: 1, two compressed air line systems and combustible gas pipe-line system respectively are that a line arranges that axial dimension is bigger, and layout is unreasonable; 2, pipeline diameter is big, so the latus rectum size and the weight of the parts such as valve of institute's adapted are big; Particularly the glass tube suspended body flowmeter is too big, can't make device miniaturization; 3, cost height; 4, use operation inconvenience; All these problems all will need to be resolved hurrily.
Summary of the invention: the purpose of this utility model is that design provides a kind of explosion gas device for formulating, the single unit system axial dimension is big with solving, the irrational problem of layout, realize device miniaturization, reduce cost, make the integrated casingization of explosion gas device for formulating, promptly be integrated in volume and be: 1000 * 400 * 600 millimeters
3Casing in;
The explosion gas device for formulating is made up of compressed air line system, combustible gas pipe-line system and mixing chamber, and pipe-line system adopts stacked layout, and combustible gas pipeline and compressed air line are stacked on top of one another, and compressed air line is that front and back are stacked; Can be integrated in volume is: 1000 * 400 * 600 millimeters
3Casing in; The compressed air line system comprises main line and bypass two parts, the parts of main line part comprise Pressure gauge 1, ball valve 2, filter decompression two disjunctors, magnetic valve 4, flow control valve 5, micro flowmeter 6, triple valve 7, ball valve 8 and check-valves 9, and the parts of bypass segment comprise magnetic valve 10 and ball valve 11; In the compressed air line system, in the porch of pipeline Pressure gauge 1 is installed, ball valve 2, filtration decompression two disjunctors, magnetic valve 4, flow control valve 5, triple valve 7 and check-valves 9 be coupled in series successively, and ball valve 8, micro flowmeter 6, triple valve 7 be coupled in series successively; The magnetic valve 4 and flow control valve 5 parallel connections of the magnetic valve 10 of coupled in series and ball valve 11 and coupled in series; The combustible gas pipe-line system comprises Pressure gauge 12, ball valve 13, filter, magnetic valve 15, flow control valve 16, micro flowmeter 17, triple valve 18, ball valve 19, the spark arrester that is equipped with stainless steel cloth and check-valves 21; In the combustible gas pipe-line system, in the porch of pipeline Pressure gauge 12 is installed, ball valve 13, filter, magnetic valve 15, flow control valve 16, triple valve 18, spark arrester and check-valves 21 be coupled in series successively, and ball valve 19, micro flowmeter 17, triple valve 18 be coupled in series successively; The output of check-valves 9 and check-valves 21 links with flange 2201 and flange 2207 with mixing chamber that small sircle hole 2211 pore structures that anti-tempering impacts and lower end be connected to blowoff valve 23 respectively; Mixing chamber is by flange 2201, Concentric Reducers 2202, front end-plate, end plate, inner core, urceolus, take over, flange 2207, Concentric Reducers 2208, straight-through socket-welding fitting and monofilament pipe joint constitute, flange 2201 is welded on the left end of Concentric Reducers 2202, the right-hand member of Concentric Reducers 2202 is welded on the front end-plate, flange 2207 is welded on the upper end of adapter, the lower end of taking over is welded on the urceolus and communicates with big hole 2213 on it, be welded with front end-plate in the left end of urceolus, be welded with end plate in the right-hand member of urceolus, be welded with inner core in the mesopore of front end-plate and end plate, be processed with small sircle hole on the barrel of inner core, the monofilament pipe joint is welded on the below of urceolus and communicates with big hole 2214 on it, the below of monofilament pipe joint connects with blowoff valve, the end plate outside is welded with Concentric Reducers 2208, and the right-hand member of Concentric Reducers 2208 is welded with the straight-through socket-welding fitting of the flammable explosive mixture of output; Spark arrester is made of drive end bearing bracket, pad, cylindrical shell, preceding gasket ring, stainless steel cloth, middle gasket ring, back gasket ring, pressure ring, rear end cap and roof pressure bolt, pressure ring, back gasket ring, stainless steel cloth alternately and middle gasket ring, preceding gasket ring are in right-to-left is installed in cylindrical shell, drive end bearing bracket is installed in the left end of cylindrical shell through pad, the roof pressure bolt is tightened at the right-hand member of cylindrical shell, and rear end cap is installed in the right-hand member of cylindrical shell through pad; The connecting pipeline of drive end bearing bracket and ball valve 19 and triple valve 18 links, and rear end cap and check-valves 21 link.
The explosion gas device for formulating can be finished fuel gas and compressed-air actuated mixed preparing, can prepare the flammable explosive mixture of various volume ratios accurately.
The beneficial effects of the utility model, advantage and characteristics:
1, compact conformation, size are little, in light weight, use easy to operate;
2, the mixing chamber anti-backfire impact structure of novel spark arrester structure and big volume has improved the reliability of device work;
3, the good mixing effect of compressed air and combustible gas;
4, simplified system, saved a lot of valves, cost is low;
5, realized the air distribution of soot blower system is protected, can prevent the flue gas of pressurized boiler, pollution and the corrosion that ponding causes, prolonged the service life of slag-blowing equipmemt;
6, be convenient to containerzation;
7, can prepare the flammable explosive mixture of various volume ratios accurately.
Description of drawings:
Fig. 1: building block of the present utility model connects figure.
Fig. 2: the structure longitudinal section of spark arrester.
Fig. 3: the structure longitudinal section of mixing chamber.
Among the figure: 1. Pressure gauge, 2. ball valve 3. filters decompression two disjunctors, 4. magnetic valve, 5. flow control valve, 6. micro flowmeter, 7. triple valve, 8. ball valve, 9. check-valves, 10. magnetic valve, 11. ball valves, 12. Pressure gauges, 13. ball valve, 14. filters, 15. magnetic valves, 16. flow control valves, 17. micro flowmeter, 18. triple valves, 19. ball valves, 20. spark arresters, 2001. drive end bearing bracket, 2002. pads, 2003. cylindrical shells, 2004. preceding gasket ring, 2005. stainless steel cloths, gasket ring in 2006., 2007. back gasket ring, 2008. pressure rings, 2009. rear end caps, 2010. the roof pressure bolt, 21. check-valves, 22. mixing chambers, 2201. flange, 2202. Concentric Reducers, 2203. front end-plates, 2204. inner core, 2205. urceolus, 2206. take over, 2207. flange, 2208. Concentric Reducers, 2209. straight-through socket-welding fittings, 2210. the monofilament pipe joint, 2211. small sircle holes, 2212. end plates, 2213. big hole, 2214. big holes, 23. blowoff valves.
The specific embodiment:
Below in conjunction with accompanying drawing concrete structure of the present utility model and embodiment are described again once
Concrete structure: as shown in Figure 1: the explosion gas device for formulating is made up of compressed air line system, combustible gas pipe-line system and mixing chamber, system pipeline adopts stacked layout, combustible gas pipeline and compressed air line are stacked on top of one another, and compressed air line is that front and back are stacked; Can be integrated in volume is: 1000 * 400 * 600 millimeters
3Casing in; The compressed air line system comprises main line and bypass two parts, the parts of main line part comprise Pressure gauge 1, ball valve 2, filter decompression two disjunctors 3, magnetic valve 4, flow control valve 5, micro flowmeter 6, triple valve 7, ball valve 8 and check-valves 9, and the parts of bypass segment comprise magnetic valve 10 and ball valve 11; In the compressed air line system, in the porch of pipeline Pressure gauge 1 is installed, ball valve 2, filtration decompression two disjunctors 3, magnetic valve 4, flow control valve 5, triple valve 7 and check-valves 9 be coupled in series successively, and ball valve 8, micro flowmeter 6, triple valve 7 be coupled in series successively; The magnetic valve 4 and flow control valve 5 parallel connections of the magnetic valve 10 of coupled in series and ball valve 11 and coupled in series; The combustible gas pipe-line system comprises Pressure gauge 12, ball valve 13, filter 14, magnetic valve 15, flow control valve 16, micro flowmeter 17, triple valve 18, ball valve 19, the spark arrester 20 that is equipped with stainless steel cloth 2205 and check-valves 21; In the combustible gas pipe-line system, in the porch of pipeline Pressure gauge 12 is installed, ball valve 13, filter 14, magnetic valve 15, flow control valve 16, triple valve 18, spark arrester 20 and check-valves 21 be coupled in series successively, and ball valve 19, micro flowmeter 17, triple valve 18 be coupled in series successively; The output of check-valves 9 and check-valves 21 links with flange 2201 and flange 2207 with mixing chamber 24 that small sircle hole 2211 pore structures that anti-tempering impacts and lower end be connected to blowoff valve 23 respectively; As shown in Figure 3: mixing chamber 24 is by flange 2201, Concentric Reducers 2202, front end-plate 2203, inner core 2204, urceolus 2205, take over 2206, flange 2207, Concentric Reducers 2208, straight-through socket-welding fitting 2209 and monofilament pipe joint 2210 constitute, flange 2201 is welded on the left end of Concentric Reducers 2202, the right-hand member of Concentric Reducers 2202 is welded on the front end-plate 2203, flange 2207 is welded on takes over 2206 upper end, take over that 2206 lower end is welded on the urceolus 2205 and communicate with big hole 2213 on it, be welded with front end-plate 2203 in the left end of urceolus 2205, be welded with end plate 2212 in the right-hand member of urceolus 2205, be welded with inner core 2204 in the mesopore of front end-plate 2203 and end plate 2212, be processed with small sircle hole 2211 on the barrel of inner core 2204, monofilament pipe joint 2210 is welded on the below of urceolus 2205 and communicates with big hole 2214 on it, the below of monofilament pipe joint 2210 connects with blowoff valve 23, end plate 2212 outsides are welded with Concentric Reducers 2208, and the right-hand member of Concentric Reducers 2208 is welded with the straight-through socket-welding fitting 2209 of the flammable explosive mixture of output; As shown in Figure 2: spark arrester 20 is by drive end bearing bracket 2001, pad 2002, cylindrical shell 2003, preceding gasket ring 2004, stainless steel cloth 2005, middle gasket ring 2006, back gasket ring 2007, pressure ring 2008, rear end cap 2009 and roof pressure bolt 2010 constitute, pressure ring 2008, back gasket ring 2007, stainless steel cloth 2005 alternately and middle gasket ring 2006, preceding gasket ring 2004 is in right-to-left is installed in cylindrical shell 2003, drive end bearing bracket 2001 is installed in the left end of cylindrical shell 2003 through pad 2002, roof pressure bolt 2010 is tightened at the right-hand member of cylindrical shell 2003, and rear end cap 2009 is installed in the right-hand member of cylindrical shell 2003 through pad 2002; Drive end bearing bracket 2001 links with the connecting pipeline of ball valve 19 and triple valve 18, and rear end cap 2009 links with check-valves 21.
Embodiment
Open the ball valve 2 in the compressed air line system, compressed air filters through filtering decompression two disjunctors 3, and be the operating pressure of device with pressure setting, see Pressure gauge 1, in the concrete adjustment process, to match with micro flowmeter 6, this moment, ball valve 8 must be opened, the compressed air that comes out from flow control valve 5 is through triple valve 7, micro flowmeter 6, ball valve 8 and check-valves 9 are sent into mixing chamber 22, when the indicated value on being adjusted to micro flowmeter 6 meets the requirements, close ball valve 8 and triple valve 7 is in and make the compressed air that comes out from flow control valve 5 send into mixing chamber 22 through triple valve 7 and check-valves 9, after promptly setting up good compressed-air actuated flow, micro flowmeter 6 and ball valve 8 quit work; In the compressed air line system, the switching of magnetic valve 4 is controlled by electric-control system, so that realize distribution; When distribution finishes the back or stops distribution, then need to send into protection wind for pressurized boiler to soot blower system, at this moment to open ball valve 11 and magnetic valve 10 in the bypass, and close magnetic valve 4; After having sent into the compressed air require of certain volume ratio in the mixing chamber 22, magnetic valve 15 in the unlatching combustible gas pipe-line system just can be sent into the certain volume ratio in mixing chamber 22 combustible gas mixes with compressed air, at this moment obtains the combustion mixture of volume required ratio from the outlet of mixing chamber 22; The adjustment process of combustible gas flow is identical with the adjustment process of compressed air require, finishes with micro flowmeter 17, triple valve 18 and ball valve 19 at this moment; Small sircle hole 2211 pore structures on inner core 2204 barrels in the mixing chamber 22 have the function that anti-tempering is impacted, and multilayer stainless steel cloth 2005 structures of installing in the spark arrester 20 are in order to stop the burned pipeline of flame set; Air distribution protection and blowoff valve 23 the flue gas that can prevent boiler, pollution and the corrosion that ponding causes be set, prolonged the service life of slag-blowing equipmemt.
Claims (3)
1, a kind of explosion gas device for formulating is made up of compressed air line system, combustible gas pipe-line system and mixing chamber (24), it is characterized in that:
A, pipe-line system adopt stacked layout, and combustible gas pipeline and compressed air line are stacked on top of one another, and compressed air line is that front and back are stacked; Can be integrated in volume is: in 1000 * 400 * 600 millimeter 3 the casing;
B, compressed air line system comprise main line and bypass two parts, the parts of main line part comprise Pressure gauge (1), ball valve (2), filter decompression two disjunctors (3), magnetic valve (4), flow control valve (5), micro flowmeter (6), triple valve (7), ball valve (8) and check-valves (9), and the parts of bypass segment comprise magnetic valve (10) and ball valve (11); In the compressed air line system, Pressure gauge (1) is installed in the porch of pipeline, ball valve (2), filtration decompression two disjunctors (3), magnetic valve (4), flow control valve (5), triple valve (7) and check-valves (9) be coupled in series successively, and ball valve (8), micro flowmeter (6), triple valve (7) be coupled in series successively; The magnetic valve (4) and flow control valve (5) parallel connection of magnetic valve of coupled in series (10) and ball valve (11) and coupled in series;
C, combustible gas pipe-line system comprise Pressure gauge (12), ball valve (13), filter (14), magnetic valve (15), flow control valve (16), micro flowmeter (17), triple valve (18), ball valve (19), the spark arrester (20) that is equipped with stainless steel cloth (2205) and check-valves (21); In the combustible gas pipe-line system, Pressure gauge (12) is installed in the porch of pipeline, ball valve (13), filter (14), magnetic valve (15), flow control valve (16), triple valve (18), spark arrester (20) and check-valves (21) be coupled in series successively, and ball valve (19), micro flowmeter (17), triple valve (18) be coupled in series successively;
The output of D, check-valves (9) and check-valves (21) links with flange (2201) and flange (2207) with mixing chamber (22) that small sircle hole (2211) pore structure that anti-tempering impacts and lower end be connected to blowoff valve (23) respectively.
2, explosion gas device for formulating as claimed in claim 1, it is characterized in that: spark arrester (20) is by drive end bearing bracket (2001), pad (2002), cylindrical shell (2003), preceding gasket ring (2004), stainless steel cloth (2005), middle gasket ring (2006), back gasket ring (2007), pressure ring (2008), rear end cap (2009) and roof pressure bolt (2010) constitute, pressure ring (2008), back gasket ring (2007), stainless steel cloth alternately (2005) and middle gasket ring (2006), preceding gasket ring (2004) is in right-to-left is installed in cylindrical shell (2003), drive end bearing bracket (2001) is installed in the left end of cylindrical shell (2003) through pad (2002), roof pressure bolt (2010) is tightened at the right-hand member of cylindrical shell (2003), and rear end cap (2009) is installed in the right-hand member of cylindrical shell (2003) through pad (2002); Drive end bearing bracket (2001) links with the connecting pipeline of ball valve (19) and triple valve (18), and rear end cap (2009) links with check-valves (21).
3, explosion gas device for formulating as claimed in claim 1, it is characterized in that: mixing chamber (24) is by flange (2201), Concentric Reducers (2202), front end-plate (2203), inner core (2204), urceolus (2205), take over (2206), flange (2207), Concentric Reducers (2208), straight-through socket-welding fitting (2209) and monofilament pipe joint (2210) constitute, flange (2201) is welded on the left end of Concentric Reducers (2202), the right-hand member of Concentric Reducers (2202) is welded on the front end-plate (2203), flange (2207) is welded on the upper end of adapter (2206), the lower end of taking over (2206) is welded on that urceolus (2205) is gone up and communicates with big hole (2213) on it, be welded with front end-plate (2203) in the left end of urceolus (2205), be welded with end plate (2212) in the right-hand member of urceolus (2205), be welded with inner core (2204) in the mesopore of front end-plate (2203) and end plate (2212), be processed with small sircle hole (2211) on the barrel of inner core (2204), monofilament pipe joint (2210) is welded on the below of urceolus (2205) and communicates with big hole (2214) on it, the below of monofilament pipe joint (2210) connects with blowoff valve (23), end plate (2212) outside is welded with Concentric Reducers (2208), and the right-hand member of Concentric Reducers (2208) is welded with the straight-through socket-welding fitting (2209) of the flammable explosive mixture of output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520020724 CN2789601Y (en) | 2005-04-27 | 2005-04-27 | Explosive gas preparing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520020724 CN2789601Y (en) | 2005-04-27 | 2005-04-27 | Explosive gas preparing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2789601Y true CN2789601Y (en) | 2006-06-21 |
Family
ID=36789932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520020724 Expired - Fee Related CN2789601Y (en) | 2005-04-27 | 2005-04-27 | Explosive gas preparing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2789601Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458267C (en) * | 2007-01-15 | 2009-02-04 | 同济大学 | Air distributing device |
| CN101628546B (en) * | 2009-08-12 | 2012-08-22 | 中原特种车辆有限公司 | Pressure reducing system for fuel gas and natural gas dewaxing vehicle |
| CN102705708A (en) * | 2012-06-19 | 2012-10-03 | 无锡宇吉科技有限公司 | Natural gas main pipe system |
| CN102777766A (en) * | 2012-06-18 | 2012-11-14 | 无锡宇吉科技有限公司 | Natural gas pipeline gas-transmission system |
-
2005
- 2005-04-27 CN CN 200520020724 patent/CN2789601Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458267C (en) * | 2007-01-15 | 2009-02-04 | 同济大学 | Air distributing device |
| CN101628546B (en) * | 2009-08-12 | 2012-08-22 | 中原特种车辆有限公司 | Pressure reducing system for fuel gas and natural gas dewaxing vehicle |
| US9441577B2 (en) | 2009-08-12 | 2016-09-13 | ZYT Petroleum Equipment Co., Ltd. | Pressure reducing system for fuel gas and natural gas dewaxing vehicle |
| CN102777766A (en) * | 2012-06-18 | 2012-11-14 | 无锡宇吉科技有限公司 | Natural gas pipeline gas-transmission system |
| CN102705708A (en) * | 2012-06-19 | 2012-10-03 | 无锡宇吉科技有限公司 | Natural gas main pipe system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2789601Y (en) | Explosive gas preparing apparatus | |
| CN201636874U (en) | Mixed oil-gas burner | |
| CN206801725U (en) | A kind of bavin hydrogen blender | |
| CN102032571A (en) | Oxygen-enriched and combustion-supporting device suitable for low calorific value fuel gas | |
| CN212713282U (en) | Double-chamber lime kiln | |
| CN2506295Y (en) | Safety flame trap for oxygen mixing gas combustion | |
| CN201944842U (en) | Oxygen-enriched combustion-supporting device applied to fuel gas with low heating value | |
| CN206724165U (en) | Blender igniting cabinet for boiler flue | |
| CN211854076U (en) | High-efficient intelligent boiler combustion energy saving and emission reduction system | |
| CN111454004A (en) | Double-chamber lime kiln | |
| CN215372463U (en) | Pure oxygen combustion system for smelting short kiln | |
| CN212251168U (en) | Multifunctional gas fire valve | |
| CN220169498U (en) | Novel torch ignition sled piece | |
| CN215002245U (en) | Novel oil boiler for boats and ships | |
| CN220471626U (en) | Adjustable secondary air nozzle structure for small garbage incinerator | |
| CN220551187U (en) | Diesel supply system for diesel generator set | |
| CN219366183U (en) | Combined type water molecule refiner | |
| CN202216260U (en) | Gas distribution initiator for utilizing mixture of vortex pump gas and acetylene gas | |
| CN209295193U (en) | A kind of ignition of the boiler petroleum economizer | |
| CN210799174U (en) | Anti-backfire device of engine | |
| CN214366315U (en) | Waste gas secondary combustion device | |
| CN215162413U (en) | Safe discharge device for replacement gas of acetylene generator | |
| CN215351674U (en) | Gas pipeline flame arrester convenient to clearance | |
| CN202199251U (en) | Nitrogen-reducing denitration atomizing spray gun for explosion-proof pipe | |
| CN101900358B (en) | Anti-backfire lowest pressure by-pass control device of gas furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060621 Termination date: 20100427 |