CN102278508A - Automatic explosion-protection equipment - Google Patents
Automatic explosion-protection equipment Download PDFInfo
- Publication number
- CN102278508A CN102278508A CN2011101743120A CN201110174312A CN102278508A CN 102278508 A CN102278508 A CN 102278508A CN 2011101743120 A CN2011101743120 A CN 2011101743120A CN 201110174312 A CN201110174312 A CN 201110174312A CN 102278508 A CN102278508 A CN 102278508A
- Authority
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- China
- Prior art keywords
- annular
- explosion
- proof door
- seal groove
- polished rod
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000004880 explosion Methods 0.000 claims description 59
- 238000012856 packing Methods 0.000 claims description 11
- 239000011819 refractory material Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000009970 fire resistant effect Effects 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 238000004079 fireproofing Methods 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 239000011796 hollow space material Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 34
- 230000005484 gravity Effects 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 239000002360 explosive Substances 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 235000019504 cigarettes Nutrition 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005474 detonation Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000004200 deflagration Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000009992 mercerising Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
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- Switch Cases, Indication, And Locking (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to automatic explosion-protection equipment which is characterized by comprising an annular base, wherein an annular sealing groove is welded on the annular base, wherein a plurality of polish rod sliding rails are welded on the annular base outside the annular sealing groove at intervals, the other end of each polish rod sliding rail passes through a circular explosion-protection door and an annular panel in a sliding manner, the circular explosion-protection door and an annular panel are arranged above the annular base, a spring is sleeved on each polish rod sliding rail between the circular explosion-protection door and the annular panel, a screw thread is arranged on the end part of each polish rod sliding rail above the annular panel and a nut is screwed on the screw thread. The automatic explosion-protection equipment has the advantages of simple structure arrangement, convenience for installation, long service life and less steel consumption, and capability of realizing sealing and resetting without depending self gravity, solves the problem of capabilities of instant pressure release and instant effective sealing which can not be thoroughly solved in years in the industry, and can be widely applied to industrial devices such as high-temperature and inflammable explosive powder containers, pipelines and the like of various similar powder boilers needing explosion-protection functions.
Description
Technical field
The present invention relates to a kind of flameproof apparatus, particularly about a kind of automatic explosion-proof device that is used on powder boiler, the inflammable and explosive container of powder and the pipeline.
Background technique
Powder boiler, heat-conducting oil furnace and other Industrial Stoves, is main fuel with coal dust and various biomass powder with other flammable powders, in concrete production practices, because powder has in essence different at the characteristic of burner hearth internal combustion and other fuel, deflagration phenomenon takes place in powder easily in burner hearth, cause the damage of equipment such as powder boiler, even can damage operator.
General powder boiler, the inflammable and explosive container of powder and pipeline prevent that the method for detonation from being: on boiler to the top in the cigarette air channel between the chimney gravity type explosion proof door is installed, its working principle is the circular cast iron lid and the base of a heaviness, side connects with hinge, when detonation takes place, the moment increase of cigarette air channel pressure, wash the iron covering pressure release open, iron covering falls to resetting by self gravitation after the pressure release.This kind method is promptly adopted in the cement plant.The shortcoming of this method is: 1, because of the gravity type explosion proof door by self gravitation sealing with reset, so can only be installed in upper, can't use in the side position, and the powder upper boiler is a drum and inapplicable; 2, the gravity type explosion proof door only relies on gravity sealing, and is poorly sealed, causes malleation to leak cigarette, negative pressure air leakage, and this defective can't overcome, and the flameproof apparatus that can pressure release can seal is the problem that can't thoroughly solve for many years in the industry; 3, because of the gravity type explosion proof door by self gravitation sealing with reset, so need reach certain own wt, therefore, cylinder iron make usually, the equipment heaviness is not light and handy, the installation and maintenance inconvenience, steel using amount is big simultaneously; 4, cast iron is crisp and immalleable, frangible, and the moment pressure release power in cigarette air channel is very big, often the gravity type explosion proof door is smashed, and as use the cast steel manufacturing, then cost be multiplied also cannot say for sure not broken.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide does not a kind ofly need by gravity sealing and resets, can be automatically to instantaneous pressure releases of equipment such as powder boilers, and the automatic explosion-proof device of equipment such as the sealing powder boiler that after the moment pressure release, automatically resets.
For achieving the above object, the present invention takes following technological scheme: a kind of automatic explosion-proof device, it is characterized in that: it comprises an annular base, welding one annular seal groove on the described annular base, be welded with some polished rod slide rails at interval on the described annular base in the described annular seal groove outside, the other end of each described polished rod slide rail slides and passes circular explosion proof door and the annular panel that is arranged on described annular base top, all be arranged with spring on the described polished rod slide rail of between described circular explosion proof door and the annular panel each, the end of each described polished rod slide rail of described annular panel top is provided with screw thread, and all tightens a nut.
The described annular seal groove that welds on the described annular base comprises annular seal groove outer ring and annular seal groove inner ring, is provided with the refractory seal packing in the described annular seal groove; An O-ring seal is welded in described circular explosion proof door bottom surface, and the other end of described O-ring seal is arranged in the described annular seal groove, and with described annular seal groove in the described refractory seal packing that is provided with form the labyrinth sealing form.
The middle part of described circular explosion proof door is set to through hole, described lead to the hole site is provided with a shrouding that described through hole is sealed, the described circular explosion proof door end face of described shrouding top is provided with a tubular cover plate, described tubular cover plate and described circular explosion proof door are welded as a whole, and the hollow space between described tubular cover plate and the described circular explosion proof door is filled with refractory material.
Described circular explosion proof door is provided with sees fiery window, described sight fire window comprise one with the sight fire tube of described tubular cover plate welding, an end of described sight fire tube passes described fire proofing material and shrouding, and flushes with described shrouding; The other end of described sight fire tube passes described tubular cover plate top, and sealing is provided with one and sees igniter cap endways, described sight igniter cap middle part is provided with the flame-observing hole of being made by transparent material, compresses between described sight igniter cap and the described sight fire tube and is provided with refractory glass and fire-resistant pad.
The quantity of the some described polished rod slide rail that welds at interval on the described annular base in the described annular seal groove outside is four.
The position that each described polished rod slide rail passes on the described circular explosion proof door is provided with the tubular type slideway.
The present invention is owing to take above technological scheme; it has the following advantages: 1; the present invention is welded with the polished rod slide rail of some band silks on annular base; each polished rod slide rail passes tubular type slideway and the annular panel on the circular explosion proof door; and on the polished rod slide rail between circular explosion proof door and the annular panel, be arranged with spring; polished rod slide rail top is provided with screw thread and is furnished with nut; fastening nut; make annular panel holddown spring (pressure that can be according to need and the turn nut is adjusted spring pressure); and then make spring that certain compression elasticity be arranged; therefore; under normal circumstances; circular explosion proof door compresses the annular seal groove on the annular base under the spring force effect; and then the powder boiler sealed, when deflagration phenomenon took place, the pressure in the powder boiler promoted circular explosion proof door pressure spring and opens automatically; play moment pressure release effect; and after the moment pressure release, close circular explosion proof door automatically, moment sealing burner hearth is effectively protected body of heater safety simultaneously.2, the present invention's annular base is provided with annular seal groove, be provided with the refractory seal packing in the annular seal groove, the present invention is provided with O-ring seal in circular explosion proof door bottom surface, refractory seal packing in O-ring seal and the annular seal groove forms the labyrinth seal form, therefore, impact force in the time of can absorbing circular explosion proof door momentary reset playing the effect of reset buffering and elastic support, reaches the purpose of effective sealing simultaneously.3, the circular explosion proof door of the present invention is provided with the sight fire tube, see fire tube and compress high temperature resistant tempering glass sheet by seeing igniter cap and fire-resistant packing ring, therefore, can be by seeing igniter cap, with the combustion position of the camera direct observation powder boiler internal on the computer of automatic control chamber that is installed in the stove tail.4, be provided with on the annular base of the present invention respectively pass cast slideway on the circular explosion proof door with mercerising bar slide rail after, its end passes annular panel, and fastening with nut, therefore, it is evenly indeformable to control polished rod slide rail terminal position.5, the middle part of circular explosion proof door of the present invention is set to through hole, can alleviate weight, the economical with materials of circular explosion proof door; The present invention has a tubular cover plate in circular explosion proof door welded top, compress between tubular cover plate and the circular explosion proof door and be filled with refractory material, and after filling up refractory material, by shrouding is set the refractory material between circular explosion proof door and the tubular cover plate is sealed, satisfied the preparation process requirement, and shrouding adopts the thick general steel plate material of 3mm to make, and is in light weight, saves cost.6, structure of the present invention is provided with simply ingenious, easy for installation, long service life, steel using amount is few, do not need just can realize sealing and resetting by self gravitation, solved the problem that can't thoroughly solve for many years in the industry: can the moment pressure release can effectively seal moment again, therefore, can be widely used on the commercial plants such as the high temperature of the various similar powder boilers that need explosion prevention function and inflammable and explosive powder container, pipeline.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is the schematic top plan view of Fig. 1
Fig. 3 is that the present invention sees fiery window construction schematic representation
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1 and Figure 2, the present invention includes an annular base 1, annular base 1 is provided with annular seal groove 2, annular seal groove 2 comprises annular seal groove outer ring 3 and the annular seal groove inner ring 4 that is welded on the annular base 1, is provided with refractory seal packing 5 in the annular seal groove 2 that forms between annular seal groove outer ring 3 and the annular seal groove inner ring 4; Be welded with the polished rod slide rail 6 of some band silks on the annular base 1 in 3 outsides, annular seal groove outer ring at interval, the other end of each polished rod slide rail 6 slides and passes circular explosion proof door 7 and the annular panel 8 that is arranged on annular base 1 top, all be arranged with spring 9 on each polished rod slide rail 6 between circular explosion proof door 7 and the annular panel 8, the end of each polished rod slide rail 6 of annular panel 8 tops is provided with screw thread, and is furnished with nut 10, fastening nut 10, make annular panel 8 pressure springs 9, make spring 9 have certain compression elasticity.The bottom surface of circular explosion proof door 7 is welded with O-ring seal 11, and the other end of O-ring seal 11 is arranged in the annular seal groove 2 on the annular base 1, and with annular seal groove 2 in the refractory seal packings 5 that are provided with form the labyrinth sealing forms.
In the as installed process, pressure turn nut 10 that can be is according to need adjusted the compression elasticity of springs 9, because O-ring seal 11 forms labyrinth sealings with the annular seal groove 2 interior refractory seal packings that are provided with 5, therefore, circular explosion proof door 7 can be by the compression elasticity of spring 9, and do not need self gravitation, just can realize sealing, and when circular explosion proof door 7 momentary reset, the labyrinth sealing that O-ring seal 11 and refractory seal packing 5 form can be played the effect of reset buffering and elastic support.
The middle part of circular explosion proof door 7 is set to through hole, circular explosion proof door 7 welded top have a tubular cover plate 12, compress between tubular cover plate 12 and the circular explosion proof door 7 and be filled with refractory material 13, after filling up refractory material 13 between tubular cover plate 12 and the circular explosion proof door 7, be welded with a shrouding 14 in the position of circular explosion proof door 7 middle part through holes, with 13 sealings of the refractory material between circular explosion proof door 7 of sealing and the tubular cover plate 12.
As Fig. 1, shown in Figure 3, circular explosion proof door 7 is provided with sees fiery window 15, see fiery window 15 and comprise the sight fire tube 16 that passes tubular cover plate 12 and weld with tubular cover plate 12, an end of seeing fire tube 16 passes fire proofing material 13 and shrouding 14, and flush with shrouding 14, see fire tube 16 the other ends and pass tubular cover plate 12 end faces, and be provided with one at sight fire tube 16 end seals and see igniter cap 17, see igniter cap 17 middle parts and be provided with the flame-observing hole of making by transparent material 18, see between igniter cap 17 and the sight fire tube 16 and be provided with refractory glass 19 and fire-resistant pad 20.By seeing the interaction of igniter cap 17 and fire-resistant pad 20, refractory glass 19 sealings can be pressed on and see fire tube 16 ends.
In the foregoing description, the quantity of the polished rod slide rail 6 of the some band silks that weld at interval on the annular base 1 in 3 outsides, annular seal groove outer ring is four, and the polished rod slide rail 6 of four band silks is along the outer circumferential evenly welding at interval of annular seal groove outer ring 3.
In the foregoing description, the position that polished rod slide rail 6 passes on the circular explosion proof door 7 is provided with the tubular type slideway.
In the foregoing description, annular base 1, annular seal groove outer ring 3, annular seal groove inner ring 4, circular explosion proof door 7, O-ring seal 11 adopt the thick general steel plate material of 10mm to make.
In the foregoing description, the shrouding 14 that circular explosion proof door 7 middle parts are provided with adopts the thick general steel plate material of 3mm to make.
The present invention can be used on powder boiler, the inflammable and explosive container of powder and the pipeline, and its installation and application is basic identical, installs and uses the orientation and can realize the installation of universal position, does not limit installation direction and orientation.Now being used on the powder boiler with the present invention is example, describe: the afterbody at the powder boiler offers a through hole, the cavity ring of annular base 1 is aimed at the through hole of boiler tail, and then the bottom anchor ring of annular base 1 is welded on the circumferential furnace wall of the through hole of powder boiler tail; Powder is in burner hearth during normal combustion, and circular explosion proof door 7 is under the resilient force of the spring on the polished rod slide rail 69, with annular base 1 and 7 sealings of circular explosion proof door, and then with the powder boiler seal; When the powder abnormal combustion, when the powder boiler will detonation take place, the pressure in the powder boiler increased, pressure promotes circular explosion proof door 7 pressure springs 9 and opens, and the moment pressure release of powder boiler is after the pressure release, circular explosion proof door 7 automatically resets under the effect of spring force, and the powder boiler seal is closed; Simultaneously, can be by seeing igniter cap 17, with the camera that is installed in the powder boiler tail, the combustion position of direct observation powder boiler internal on the computer of automatic control chamber.
The various embodiments described above only are used to illustrate the present invention, and wherein the structure of each parts, Placement etc. all can change to some extent, and every equivalents of carrying out on the basis of technical solution of the present invention and improvement all should not got rid of outside protection scope of the present invention.
Claims (9)
1. automatic explosion-proof device, it is characterized in that: it comprises an annular base, welding one annular seal groove on the described annular base, be welded with some polished rod slide rails at interval on the described annular base in the described annular seal groove outside, the other end of each described polished rod slide rail slides and passes circular explosion proof door and the annular panel that is arranged on described annular base top, all be arranged with spring on the described polished rod slide rail of between described circular explosion proof door and the annular panel each, the end of each described polished rod slide rail of described annular panel top is provided with screw thread, and all tightens a nut.
2. a kind of automatic explosion-proof device as claimed in claim 1 is characterized in that: the described annular seal groove that welds on the described annular base comprises annular seal groove outer ring and annular seal groove inner ring, is provided with the refractory seal packing in the described annular seal groove; An O-ring seal is welded in described circular explosion proof door bottom surface, and the other end of described O-ring seal is arranged in the described annular seal groove, and with described annular seal groove in the described refractory seal packing that is provided with form the labyrinth sealing form.
3. a kind of automatic explosion-proof device as claimed in claim 1 or 2, it is characterized in that: the middle part of described circular explosion proof door is set to through hole, described lead to the hole site is provided with a shrouding that described through hole is sealed, the described circular explosion proof door end face of described shrouding top is provided with a tubular cover plate, described tubular cover plate and described circular explosion proof door are welded as a whole, and the hollow space between described tubular cover plate and the described circular explosion proof door is filled with refractory material.
4. a kind of automatic explosion-proof device as claimed in claim 3, it is characterized in that: described circular explosion proof door is provided with sees fiery window, the fiery window of described sight comprise one with the sight fire tube of described tubular cover plate welding, an end of described sight fire tube passes described fire proofing material and shrouding, and flushes with described shrouding; The other end of described sight fire tube passes described tubular cover plate top, and sealing is provided with one and sees igniter cap endways, described sight igniter cap middle part is provided with the flame-observing hole of being made by transparent material, compresses between described sight igniter cap and the described sight fire tube and is provided with refractory glass and fire-resistant pad.
5. as claim 1 or 2 or 4 described a kind of automatic explosion-proof devices, it is characterized in that: the quantity of the some described polished rod slide rail that welds at interval on the described annular base in the described annular seal groove outside is four.
6. a kind of automatic explosion-proof device as claimed in claim 3 is characterized in that: the quantity of the some described polished rod slide rail that welds at interval on the described annular base in the described annular seal groove outside is four.
7. as claim 1 or 2 or 4 or 6 described a kind of automatic explosion-proof devices, it is characterized in that: the position that each described polished rod slide rail passes on the described circular explosion proof door is provided with the tubular type slideway.
8. a kind of automatic explosion-proof device as claimed in claim 3 is characterized in that: the position that each described polished rod slide rail passes on the described circular explosion proof door is provided with the tubular type slideway.
9. a kind of automatic explosion-proof device as claimed in claim 5 is characterized in that: the position that each described polished rod slide rail passes on the described circular explosion proof door is provided with the tubular type slideway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110174312 CN102278508B (en) | 2011-06-24 | 2011-06-24 | Automatic explosion-protection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110174312 CN102278508B (en) | 2011-06-24 | 2011-06-24 | Automatic explosion-protection equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102278508A true CN102278508A (en) | 2011-12-14 |
| CN102278508B CN102278508B (en) | 2013-05-01 |
Family
ID=45104131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110174312 Active CN102278508B (en) | 2011-06-24 | 2011-06-24 | Automatic explosion-protection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102278508B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673623A (en) * | 2013-12-18 | 2014-03-26 | 山东百川同创能源有限公司 | Ultra-high-temperature furnace anti-explosion door |
| CN116677805A (en) * | 2023-08-03 | 2023-09-01 | 泰州市小波浪波纹管有限公司 | Spring type explosion-proof valve for pipe fitting connection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2285424Y (en) * | 1996-12-18 | 1998-07-01 | 上海华中锅炉厂 | Explosion-proof device for boiler |
| US20020189554A1 (en) * | 2001-06-15 | 2002-12-19 | Jurgen Kohler | Modular stamped sight glass assembly |
| CN201121908Y (en) * | 2007-07-25 | 2008-09-24 | 林荣郎 | Explosion-proof device of combustion machine |
| CN101975405A (en) * | 2010-09-03 | 2011-02-16 | 哈尔滨工程大学 | Supercharged boiler deflagration-preventing device and method |
| CN202132975U (en) * | 2011-06-24 | 2012-02-01 | 煤炭科学研究总院 | Automatic anti-explosion device |
-
2011
- 2011-06-24 CN CN 201110174312 patent/CN102278508B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2285424Y (en) * | 1996-12-18 | 1998-07-01 | 上海华中锅炉厂 | Explosion-proof device for boiler |
| US20020189554A1 (en) * | 2001-06-15 | 2002-12-19 | Jurgen Kohler | Modular stamped sight glass assembly |
| CN201121908Y (en) * | 2007-07-25 | 2008-09-24 | 林荣郎 | Explosion-proof device of combustion machine |
| CN101975405A (en) * | 2010-09-03 | 2011-02-16 | 哈尔滨工程大学 | Supercharged boiler deflagration-preventing device and method |
| CN202132975U (en) * | 2011-06-24 | 2012-02-01 | 煤炭科学研究总院 | Automatic anti-explosion device |
Non-Patent Citations (1)
| Title |
|---|
| 黄宝成: "布袋除尘器防爆门的选型研究与应用", 《大氮肥》, vol. 34, no. 1, 28 February 2011 (2011-02-28) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673623A (en) * | 2013-12-18 | 2014-03-26 | 山东百川同创能源有限公司 | Ultra-high-temperature furnace anti-explosion door |
| CN103673623B (en) * | 2013-12-18 | 2015-02-18 | 山东百川同创能源有限公司 | Ultra-high-temperature furnace anti-explosion door |
| CN116677805A (en) * | 2023-08-03 | 2023-09-01 | 泰州市小波浪波纹管有限公司 | Spring type explosion-proof valve for pipe fitting connection |
| CN116677805B (en) * | 2023-08-03 | 2023-11-17 | 泰州市小波浪波纹管有限公司 | Spring type explosion-proof valve for pipe fitting connection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102278508B (en) | 2013-05-01 |
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Effective date of registration: 20170207 Address after: Beijing Caiyu Economic Development Zone 102606 Beijing city Daxing District Long Yu Caiyu Town Street No. 5 Patentee after: CHINA COAL RESEARCH INSTITUTE (CCRI) ENERGY SAVING TECHNOLOGY CO.,LTD. Address before: 100013 Chaoyang District, Hepingli Youth Ditch Road, No. 5, No. Patentee before: CCTEG CHINA COAL Research Institute |
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Address after: 102606 No.5, Yulong Street, Caiyu Economic Development Zone, Caiyu Town, Daxing District, Beijing Patentee after: Beijing Tiandi Sunac Technology Co.,Ltd. Address before: 102606 No.5, Yulong Street, Caiyu Economic Development Zone, Caiyu Town, Daxing District, Beijing Patentee before: CHINA COAL RESEARCH INSTITUTE (CCRI) ENERGY SAVING TECHNOLOGY CO.,LTD. |
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