CN202973105U - Combined combustion gun - Google Patents
Combined combustion gun Download PDFInfo
- Publication number
- CN202973105U CN202973105U CN201220489154.8U CN201220489154U CN202973105U CN 202973105 U CN202973105 U CN 202973105U CN 201220489154 U CN201220489154 U CN 201220489154U CN 202973105 U CN202973105 U CN 202973105U
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- gun barrel
- interior
- combustion
- rifle
- mixed combustion
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Abstract
The utility model provides a combined combustion gun which comprises an outer gun barrel and an inner gun barrel, wherein the inner gun barrel is coaxially sleeved with the outer gun barrel; a first combustion medium passage is formed in the inner gun barrel; a second combustion medium passage is formed between the inner gun barrel and the outer gun barrel; the front end of the outer gun barrel is movably connected with an outer hood; the front end of the inner gun barrel is movably connected with an inner gun nozzle; the periphery of the inner gun nozzle is sleeved with the outer hood; the outer surface of the inner gun nozzle is cone-shaped; the inner surface of the outer hood is cone-shaped; and a gap of 3 to 5 mm is formed between the inner gun nozzle and the outlet end of the outer hood. The combined combustion gun provided by the utility model can implement combined combustion between gas and gas and between gas and powder or single combustion of one combustion medium, can control the position of a flame root of flame and flame length, can regulate heat utilization rate, is sufficient to burn, enables the glass melting working condition to be in the optimal state, has an obvious energy-saving effect and has a long service life.
Description
Technical field
The utility model belongs to glass manufacture fusion cast glass field of combustion technology, is specifically related to a kind of mixed combustion rifle.
Background technology
At present, the combustion medium that glass manufacture enterprise fusion cast glass is used generally adopts heavy oil, coal tar, water-coal-slurry, coal gas, natural gas etc.Because the calorific value of heavy oil combustion is high, it is the main fuel of fusion cast glass that most of glass enterprise all adopts heavy oil, but rising steadily along with international oil price in recent years, and heavy oil combustion is seriously polluted, enterprise changes one after another burns the cheap coal tar of price comparison, but the output of coal tar declines to a great extent now, and price also constantly rises, and also causes certain environmental pollution.
Constantly surging along with fuel price, the glass production line cost is constantly soaring, forces industrial and mining enterprises to develop a kind of fresh fuel or diversification replacement of fuel traditional fuel.For this reason, those skilled in the art seek discovery, take natural gas, petroleum coke powder as the mixed combustion medium, can satisfy manufacturing technique requirent melten glass liquid, can be used as emerging energy and substitute traditional energy, and natural gas belongs to the primary energy of cleaning, can play again the effect of environmental protection.
But the existing neat gas burner of glass furnace is simple in structure at present, and combustion medium is single, can not thoroughly burn in combustion process, service life is short, and the burner scaling loss is too fast, simultaneously, be high-temperature operation owing to changing burner, the frequent replacing brought great potential safety hazard to producers.Therefore, make a kind of device that is suitable for the mixed combustion of industrial production demand, become in the urgent need to.
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The utility model content
Single in order to overcome existing neat gas burner combustion medium, burn not thorough, burner is not durable and the problem such as security, the utility model provides a kind of mixed combustion rifle, described mixed combustion rifle can realize a kind of or two media fully burns simultaneously, the flame white heat, improve heat utilization efficiency, energy-saving effect is obvious, and service life is relatively long.
The technical solution of the utility model is:
A kind of mixed combustion rifle, described mixed combustion rifle comprises coaxial sheathed outer gun barrel and interior gun barrel, forms the first combustion medium passage in interior gun barrel, forms the second combustion medium passage between interior gun barrel and outer gun barrel; The tail end of described interior gun barrel is provided with the first combustion medium entrance, and the tail end of outer gun barrel is provided with the second combustion medium entrance;
The front end of described outer gun barrel is connected with outer blast cap, and the front end of interior gun barrel is connected with interior rifle mouth, and described exogenous wind cap sleeve to be located at interior rifle mouth peripheral; The outer surface of described interior rifle mouth is conical, and the inner surface of outer blast cap is conical, and the gap of interior rifle mouth and the outer blast cap port of export is 3-5mm.
When the mixed combustion rifle that adopts utility model to provide carries out mixed combustion technique, in driving by adjusting nut, gun barrel moves axially along outer gun barrel, gap and the relative position of rifle mouth and the outer blast cap port of export in adjusting, change flow velocity and the emission direction of the combustion medium in outer gun barrel, interior gun barrel, thereby control mixed flame fire root position, the control length of flame and scope satisfy different tonnage glass melters to the different demands of flame forms; Burning (for example independent burning of gas and gas mixed combustion, gas and powder mixed combustion or a kind of combustion medium) when it can realize a kind of or two kinds of different mediums, heat utilization efficiency is adjustable, and sufficient combustion, flame is bright, range is long, make the glass melting operating mode reach optimum state, energy-saving effect is obvious, long service life is applicable to fusing and the glass technology production of jet flames heating glass metal.Simultaneously, be flexibly connected between outer blast cap and outer gun barrel, be flexibly connected between interior rifle mouth and interior gun barrel, can change after scaling loss, and need not to change whole burner, thereby improve and extend service life of other parts.
Description of drawings
Fig. 1 is the structural representation of the mixed combustion rifle that provides of the utility model.
In figure, 1---outer blast cap, 2---interior rifle mouth, 3---outer gun barrel, 4---interior gun barrel, 5---sealing ring, 6---sleeve, 7---sealing nut, 8---locked nut, 9---adjusting nut; 10---the first combustion medium entrance, 11---the second combustion medium entrance, 12---the protective gas pipe, 13---the first combustion medium passage, 14---the second combustion medium passage, 15---the strong point, d---the gap of interior rifle mouth 2 and outer blast cap 1 port of export.
The specific embodiment
The utility model provides a kind of mixed combustion rifle, and as shown in Figure 1, described mixed combustion rifle comprises coaxial sheathed outer gun barrel 3 and interior gun barrel 4.Interior gun barrel 4 is the inner and outer pipes composite construction with outer gun barrel 3, imports respectively different medium and can realize that one or both media burn simultaneously.
As shown in Figure 1, interior formation the first combustion medium passage 13 of interior gun barrel 4 forms the second combustion medium passage 14 between outer gun barrel 3 and interior gun barrel 4.The tail end of described interior gun barrel 4 is provided with the first combustion medium entrance 10, and the tail end of outer gun barrel 3 is provided with the second combustion medium entrance 11.
The front end of outer gun barrel 3 is connected with outer blast cap 1, and the front end of interior gun barrel 4 is connected with interior rifle mouth 2, and described outer blast cap 1 is sheathed on interior rifle mouth 2 peripheries.Wherein, the mode of flexible connection can be and is threaded, but is not limited to this.For example, described outer blast cap 1 can be connected on outer gun barrel 3 by internal thread, and described interior rifle mouth 2 is connected on interior gun barrel 4, as shown in Figure 1 by external screw thread.
The inner surface of described outer blast cap 1 is conical, and its front end flame place wall thickness is the thickest, and anti-scaling loss ability is stronger.Described interior rifle mouth 2 is formed with groove near on an end of interior gun barrel 4 by inner bore chamfering, and smooth and easy the passing through of the first combustion medium that it is convenient in interior gun barrel 4 accumulated powder can not occur, hang the powder phenomenon when for example the first combustion medium is the powder combustion medium.The outer surface of interior rifle mouth 2 is conical.Under preferable case, interior rifle mouth 2 circular cone small end external diameters improve its anti-scaling loss ability in the situation that the outer blast cap 1 of assurance and interior rifle mouth 2 port of export reasonable clearances are got maximum as far as possible to increase interior rifle mouth 2 spitfire end wall thickness.
In the utility model, described outer blast cap 1 and interior rifle mouth 2 all adopt the high temperature resistant stainless steel material to make, and can directly change after its scaling loss, and not need to change whole burner, thereby improve and extend service life of other parts.
The interior gun barrel 4 of described mixed combustion rifle inserts from the tail end of outer gun barrel 3, and is tightly connected between the tail end of described outer gun barrel 3 and interior gun barrel 4, prevents that combustion medium from leaking.Particularly, be tightly connected by sealing nut 7 between the tail end of described outer gun barrel 3 and interior gun barrel 4.Be provided with sealing ring 5 between described sealing nut 7 and outer gun barrel 3, interior gun barrel 4.The number of sealing ring 5 can suitably be selected according to actual needs, and the utility model does not have particular determination.Be threaded connection mode between sealing nut 7 and interior gun barrel 4, the sealing connected mode is detachable, thereby replaceable sealing ring 5 and corresponding seal member effectively prevent the combustion medium leakage, guarantee safe combustion.
As a kind of preferred embodiment of the present utility model, also be provided with several apertures on the outer surface of sealing nut 7, by adopting the special spanner rotation to tighten or unscrewing sealing nut 7.
On interior gun barrel 4, fixed cover is provided with adjusting nut 9, and this adjusting nut 9 can drive interior gun barrel 4 and move axially along outer gun barrel 3, thereby the gap d of adjusting interior rifle mouth 2 and outer blast cap 1 port of export is 3-5mm.In driving by rotation adjusting nut 9, gun barrel 4 moves axially in gun barrel 3 outside, can change interior gun barrel 4, outer gun barrel 3 relative axial positions, thereby gap and relative position in adjusting between rifle mouth 2 conical external surface and outer blast cap 1 conical inner surface, change flow velocity and the emission direction of the first combustion medium passage 13 and the second combustion medium passage 14 internal combustion media, thereby control mixed flame fire root position, the control length of flame and scope satisfy different tonnage glass melters to the different demands of flame forms.
The tail end of described outer gun barrel 3 is connected the location with interior gun barrel 4 by sleeve 6.Described sleeve can adopt 45# steel workpiece, but is not limited to this.Particularly, as shown in Figure 1, the left end of sleeve 6 is provided with cavity, and this cavity can be used as the cavity of nut erection support, is used for mounting nuts.The right-hand member of sleeve 6 is threaded connection with jackscrew and is fixed in outer gun barrel 3 tail ends.
Also be provided with locked nut 8 between described adjusting nut 9 and sleeve 6.Particularly, the right-hand member of adjusting nut 9 is provided with round boss, and locked nut 8 is sheathed on round boss, and locked nut 8 and round boss integral body are positioned at the cavity of sleeve 6 left ends.Be fixedly connected with by screw thread between locked nut 8 and sleeve 6 left end cavitys, and locked nut 8 is positioned at the cavity of sleeve 6, thereby adjusting nut 9 is stuck in the cavity of sleeve 6 left ends and can flexible rotating.Under preferable case, also can be provided with several grooves on locked nut 8, by adopting the special spanner rotation to tighten or unscrewing locked nut 8.
As shown in Figure 1, the tail end of described outer gun barrel 3 is provided with elbow, and described the second combustion medium entrance 11 is positioned on described elbow.Described outer gun barrel 3 can adopt 45# seamless steel pipe and machined part to be welded, but is not limited to this.The outer gun barrel 3 that is welded has appropriate gap to be convenient to that interior gun barrel 4 moves axially therein and the axiality of interior gun barrel 4 and outer gun barrel 3 when in need guaranteeing, gun barrel 4 is packed into wherein.Interior gun barrel 4 can adopt the 45# seamless steel pipe to process, but is not limited to this.The inner surface of interior gun barrel 4 requires processing smooth, prevent that it from producing obstruction power to the first combustion medium that the first combustion medium passage 13 passes through, for example when the first combustion medium is the powder combustion medium, can effectively guarantee powder combustion medium smooth and easy passing through therein, accumulated powder, extension powder do not cause the internal diameter of the first combustion medium passage 13 to diminish.
As a kind of preferred embodiment of the present utility model, also be provided with protective gas pipe 12 on the elbow of described outer gun barrel.When described mixed combustion rifle cut-out combustion medium is stopped using; pass into normal temperature compressed air (namely protecting gas) by protective gas pipe 12; outer blast cap 1 and the interior rifle mouth 2 of cooling and mixing burning rifle front end; protect it not to be burned; therefore some groups of burners are switched when using and needn't be removed the burner dismounting in glass furnace, reduce operating personnel's workload.
As shown in Figure 1, be provided with several equally distributed strong points 15 between described outer gun barrel 3 and interior gun barrel 4, the described strong point 15 is used for guaranteeing outer gun barrel 3 and the coaxial setting of interior gun barrel 4.The number of the described strong point 15 is 3-4, and is evenly distributed on gun barrel 4 in the inner surface positioning supports of outer gun barrel 3, and has appropriate gap to be convenient to interior gun barrel 4 with interior gun barrel 4 to move axially therein.
In the utility model, the total length of described mixed combustion rifle varies in size according to the melting furnaces tonnage and is designed to 700-900mm, and concrete length those skilled in the art can carry out by actual demand suitably selecting to get final product in this scope.Utility model people of the present utility model is by great many of experiments designing and calculating and combustion medium repetition test, find: in the mixed combustion rifle that the utility model provides, when the cross-sectional area ratio of the first combustion medium passage 13 and the second combustion medium passage 14 is 0.75-0.55, the consumption proportion range of choice of the first combustion medium, the second combustion medium is larger, combustion efficiency is best, can fully burn again, reach economic optimum.
Described the first combustion medium entrance 10, the second combustion medium entrance 11 can adopt connection by metal hose with corresponding combustion medium conveying arm separately.In the utility model, under preferable case, described the first combustion medium entrance 10 places and the second combustion medium entrance 11 places are equipped with non-return valve, prevent combustion medium refluence and tempering, guarantee safety.
Mixed burning method of the present utility model, be included in some mixed combustion rifles shown in Figure 1 are set in port, and pass into the first combustion medium in the first combustion medium entrance 10 of described mixed combustion rifle, pass into the second combustion medium in the second combustion medium entrance 11 of described mixed combustion rifle, two kinds of combustion mediums are burnt at ignition point position.
In the utility model, the quantity of described port is 4-8 pair, and the quantity of every pair of interior mixed combustion rifle of port can be 1-3 and props up.
In the utility model, described mixed combustion rifle is applicable to the mixed combustion between the mixed combustion between the mixed combustion between gas and gas, powder and powder and gas and powder, undoubtedly, it is also applicable to a kind of independent burning of combustion medium.Be in the utility model, described the first combustion medium, the second combustion medium can be selected from gas combustion medium or powder combustion medium independently of one another, thereby realize mixed combustion between aforementioned gas and gas, powder and powder, gas and powder and a kind of independent burning of combustion medium.
Wherein, described gas combustion medium can be natural gas, oxygen or air, and described powder combustion medium can be petroleum coke powder, biological carbon dust, graphite powder or coal dust.Wherein, because petroleum coke powder is carried with gas flow attitude voltinism energy good.As a kind of preferred embodiment of the present utility model, the first combustion medium that passes in described the first combustion medium passage 13 is petroleum coke powder (being the powder combustion medium), and the second combustion medium that passes in described the second combustion medium passage 14 is natural gas (being the gas combustion medium).More preferably in situation, the consumption proportion of described natural gas and petroleum coke powder can be chosen as the best according to the heat ratio of natural gas and petroleum coke powder combustion generation between 2:1 ~ 1:2.When adopting these two kinds of combustion mediums (being petroleum coke powder and natural gas), overpressure and flow speed stability, winding-up flame stabilization, good rigidity, good brightness, without circuit fire phenomenon, temperature stabilization in kiln (arch top temperature, regenerator breastwork temperature, flue temperature), burnout rate is high, flame and furnace temperature are regulated easy, stable equipment operation is reliable, and maintenance is little, and operating cost is low.
Wherein, petroleum coke powder quantitatively continuously, evenly, stably sprays into stove Inner burning by the petroleum coke powder induction system, the high heat that produces is up to 8300 ~ 9000 kJ/kg, burning point is 500 ℃ ~ 700 ℃, ignition temperature can reach 1500 ℃ ~ 1800 ℃, and after non-volatile composition and burning, residue is zero substantially in combustion process, and burnout rate has reached more than 99.5%, be ideal fuels, accord with energy-conservation, as to reduce discharging environmental protection economical fuel.Wherein, described petroleum coke powder dose delivery system is furnished with the roots blower air-supply arrangement, the quantitative rotor of petroleum coke powder claims and conveyance conduit, and approximately 0.04-0.05Mpa pressure is supplied with in the roots blower air-supply, satisfies the ignition point position that the requirement of dust delivery stroke reaches.Gas conveying system is furnished with decompressor, supplies with 0.03-0.04Mpa pressure, satisfies the ignition point position that the requirement of natural gas transport stroke reaches.
Under the effect of described the first combustion medium and the second combustion medium discharge pressure in the mixed combustion rifle, be transmitted into ignition point mixed combustion, satisfy the length of flame and brightness reaches optimum state.
Below in conjunction with specific embodiment, the utility model is further explained explanation.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Embodiment 1
The 500T/D float glass furnace uses 6 pairs of ports, and every pair of port is installed 1～3 mixed combustion rifle shown in Figure 1, and the gap d=4mm between interior rifle mouth 2 and outer blast cap 1.
Combustion medium adopts natural gas and petroleum coke powder, and its proportioning is 1:1, and petroleum coke powder is furnished with the arm of conveying and pressure pump device, supplies with 0.04MPa pressure, and natural gas is supplied with 0.03MPa pressure, satisfies the ignition point position that the requirement of dielectric material stroke reaches.
Petroleum coke powder is carried can be good with gas flow attitude voltinism, dielectric material overpressure and flow speed stability, mixed combustion in kiln, the flame range can reach 6500mm, flame stabilization, good rigidity, good brightness is without circuit fire phenomenon, combustion efficiency is good, burnout rate is high, and it is stable that noisy top temperature, regenerator breastwork temperature, flue temperature etc. keep, and satisfies the molten glass manufacturing technique requirent.
Use this mixed combustion rifle, completed the fusion process of frit in kiln, safe and reliable, maintenance is little, and operating cost is low.
Case study on implementation 2
The TCO glass furnace of 800T/D uses 8 pairs of ports, and every pair of port is installed 2～3 mixed combustion rifles shown in Figure 1, and the gap d=3mm between interior rifle mouth 2 and outer blast cap 1.
Combustion medium adopts natural gas and petroleum coke powder, and its proportioning is 2:3, and petroleum coke powder is furnished with the arm of conveying and pressure pump device, supplies with 0.05MPa pressure, and natural gas is supplied with 0.04MPa pressure, satisfies the ignition point position that the requirement of dielectric material stroke reaches.
Petroleum coke powder is carried can be good with gas flow attitude voltinism, dielectric material overpressure and flow speed stability, mixed combustion in kiln, the flame range can reach 6700mm, flame stabilization, good rigidity, good brightness is without circuit fire phenomenon, combustion efficiency is good, burnout rate is high, and it is stable that noisy top temperature, regenerator breastwork temperature, flue temperature etc. keep, and satisfies the molten glass manufacturing technique requirent.
Use this mixed combustion rifle, completed the fusion process of frit in kiln.Safe and reliable, maintenance is little, and operating cost is low.
Above embodiment is only preferred embodiment of the present utility model, should be pointed out that to those skilled in the art, and under the prerequisite that does not break away from the utility model principle, some improvement of having done also should be considered as protection domain of the present utility model.
Claims (10)
1. a mixed combustion rifle, is characterized in that, described mixed combustion rifle comprises coaxial sheathed outer gun barrel and interior gun barrel, forms the first combustion medium passage in interior gun barrel, forms the second combustion medium passage between interior gun barrel and outer gun barrel; The tail end of described interior gun barrel is provided with the first combustion medium entrance, and the tail end of outer gun barrel is provided with the second combustion medium entrance;
The front end of described outer gun barrel is connected with outer blast cap, and the front end of interior gun barrel is connected with interior rifle mouth, and described exogenous wind cap sleeve to be located at interior rifle mouth peripheral; The outer surface of described interior rifle mouth is conical, and the inner surface of outer blast cap is conical;
Be tightly connected between the tail end of described outer gun barrel and interior gun barrel; On described interior gun barrel, fixed cover is provided with adjusting nut, and described adjusting nut can drive interior gun barrel and move axially along outer gun barrel; The gap of interior rifle mouth and the outer blast cap port of export is 3-5mm.
2. mixed combustion rifle according to claim 1, is characterized in that, is tightly connected by sealing nut between the tail end of described outer gun barrel and interior gun barrel; Be provided with sealing ring between described sealing nut and outer gun barrel, interior gun barrel.
3. mixed combustion rifle according to claim 1, is characterized in that, the tail end of described outer gun barrel is connected the location with interior gun barrel by sleeve; The left end of described sleeve is provided with the cavity as the nut erection support, and the right-hand member of sleeve is threaded connection with jackscrew and is fixed in outer gun barrel tail end.
4. mixed combustion rifle according to claim 3, is characterized in that, also is provided with locked nut between described adjusting nut and sleeve; The right-hand member of described adjusting nut is provided with round boss, and described locked nut is sheathed on round boss, and described locked nut and round boss integral body are positioned at the cavity of sleeve left end.
5. mixed combustion rifle according to claim 1, is characterized in that, the tail end of described outer gun barrel is provided with elbow, and described the second combustion medium entrance is positioned on described elbow; Also be provided with the protective gas pipe on described elbow.
6. mixed combustion rifle according to claim 1, is characterized in that, described outer blast cap is connected on outer gun barrel by internal thread, and described interior rifle mouth is connected on interior gun barrel by external screw thread; Described interior rifle mouth is formed with groove near on an end of interior gun barrel by inner bore chamfering.
7. mixed combustion rifle according to claim 1, is characterized in that, is provided with several equally distributed strong points between described outer gun barrel and interior gun barrel, and the described strong point is used for guaranteeing outer gun barrel and the coaxial setting of interior gun barrel.
8. mixed combustion rifle according to claim 1, is characterized in that, the cross-sectional area ratio of described the first combustion medium passage and the second combustion medium passage is 0.55-0.75.
9. mixed combustion rifle according to claim 1, is characterized in that, the total length of described mixed combustion rifle is 700-900mm.
10. mixed combustion rifle according to claim 1, is characterized in that, described the first combustion medium porch and the second combustion medium porch are equipped with non-return valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220489154.8U CN202973105U (en) | 2012-09-24 | 2012-09-24 | Combined combustion gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220489154.8U CN202973105U (en) | 2012-09-24 | 2012-09-24 | Combined combustion gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202973105U true CN202973105U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220489154.8U Expired - Lifetime CN202973105U (en) | 2012-09-24 | 2012-09-24 | Combined combustion gun |
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| Country | Link |
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| CN (1) | CN202973105U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818270A (en) * | 2012-09-24 | 2012-12-12 | 株洲旗滨集团股份有限公司 | Mixed combustion gun and mixed combustion method |
| CN114538752A (en) * | 2022-01-12 | 2022-05-27 | 北京正兴鸿业金属材料有限公司 | Oxy-fuel combustion electric heating system for large-scale float plate glass production |
-
2012
- 2012-09-24 CN CN201220489154.8U patent/CN202973105U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818270A (en) * | 2012-09-24 | 2012-12-12 | 株洲旗滨集团股份有限公司 | Mixed combustion gun and mixed combustion method |
| CN102818270B (en) * | 2012-09-24 | 2015-03-18 | 株洲醴陵旗滨玻璃有限公司 | Mixed combustion gun and mixed combustion method |
| CN114538752A (en) * | 2022-01-12 | 2022-05-27 | 北京正兴鸿业金属材料有限公司 | Oxy-fuel combustion electric heating system for large-scale float plate glass production |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180919 Address after: 412205 Longyuan Chong Village, Liling East Town, Zhuzhou, Hunan Patentee after: ZHUZHOU LILING KIBING GLASS CO.,LTD. Address before: 412005 Shifeng District neighborhood committee, Shifeng District, Zhuzhou, Hunan Patentee before: ZHUZHOU KIBING GROUP CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |