CN1670429A - Embedded vacuum boiler combination barrel and vacuum boiler - Google Patents
Embedded vacuum boiler combination barrel and vacuum boiler Download PDFInfo
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- CN1670429A CN1670429A CN 200510017366 CN200510017366A CN1670429A CN 1670429 A CN1670429 A CN 1670429A CN 200510017366 CN200510017366 CN 200510017366 CN 200510017366 A CN200510017366 A CN 200510017366A CN 1670429 A CN1670429 A CN 1670429A
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Abstract
This invention discloses a push-in type vacuum boiler combination boiler barrel and vacuum boiler. The boil barrel has columnar barrel, central axis of two barrels are parallel, combination boiler barrel is formed by up and down piling barrels sealing welding along outer surface bus bar wire, and they are interconnected in embed face. Push-in vacuum boiler combination boiler barrel, condensation heat transfer equipment and heating equipment are set in vacuum boiler, condensation heat transfer is fixed in up columnar barrel, warmer device is fixed in down columnar barrel to provide hot water or vapor for surroundings. Vacuum auto control equipment is fixed in up columnar barrel to maintain the vacuum degree of boiler. The floor area of this invention is little, structure is simple easy for manufacture, and its fabrication cost is low and can be economized more than 30%. Its useful range is wide, market prospect is good, easy to extend and carry out, and it has good economic benefit.
Description
One. technical field: the present invention relates to a kind of drum and boiler, particularly relate to a kind of Combined Boiler Drum of Embedded Vacuum Boiler and Vacuum Boilers.
Two. background technology: well-known, the drum of vacuum boiler is generally circle or oval shape, and its basic structure all is that the bottom is the boiler heating part, and top is condensation portion.For circular configuration, in order to arrange enough condensation heating surfaces, must be with the enlarged diameter of drum, thus cause its volume to increase, floor space increases, and generally be positioned at densely populated residential block, commercial and residential building, hotel etc. for the place or the unit that use vacuum hot water boiler, be the business district, the soil preciousness, boiler often is installed on basement or builds the boiler room in addition, reduce the boiler room floor space and just mean the saving soil, reduce investment, and the increase of circular boiler diameter will cause investment to increase.For oval shape drum, though its floor space does not increase, its intensity is lower, manufacturability poor (circular configuration is under the identical situation of wall thickness, and its intensity is the highest, and manufacturability is best).In addition, the common condensing unit of vacuum hot water boiler is case structure or U type tubular construction, wherein case structure is made up of preceding collection case, heat exchanger tube, rear set box, demarcation strip, closure plate, all adopt Welding Structure, its advantage is: flow arrangement is flexible, and shortcoming is: make trouble, the heat exchanger of high pressure particularly, because flat closure plate stress condition is bad, add turning stress and reason such as concentrate, be difficult to meet the demands.U type tubular construction is made up of collection case, retainer plate and U type pipe fitting, is characterized in: bear the pressure height, can take out maintenance, but can only make the little heat exchanger of heat exchange amount, its reason is: 1. heat exchanger tube is a U type pipe, and flow process is 2 backhauls, if capacity is bigger, then heat exchanger tube increases, U type pipe difficult arrangement; 2. if capacity is bigger, then maintenance is relatively more difficult, because weight is big, is difficult at the scene install and remove; 3. because the heat exchange velocity in pipes is higher, damaging appears in its suspension arrangement easily, and noise is bigger, can only adapt to miniature boiler, the situation that heat-exchanging tube bundle is little, and use occasion is restricted.The formation of traditional vacuum boiler vacuum is finished by vavuum pump: dispatching from the factory preceding or at the user scene, before boiler comes into operation, the inert gas of getting rid of internal memory will be vacuumized with vavuum pump in the stove earlier, vacuum is reached more than the 0.09Mpa, seal exhaust outlet then, in order to guarantee security of operation, also is furnished with the hot melt bolt on the body of heater, after the condenser heat exchange efficiency reduces, start vavuum pump again and vacuumize, keep vacuum in the stove and so forth.Because many mouths of pipe, sensor port, manhole etc. are arranged on the stove, its difficult sealing is to reach, and than easily air inlet, vacuum is kept difficulty; Constantly open vavuum pump, shorten vavuum pump service life, increase substantially the boiler operatiopn cost, homemade in addition vavuum pump major part is all used vacuum oil, its service life is limited, is difficult to guarantee the vacuum that reaches high for a long time, uses and keeps in repair and bring great trouble to the user.Particularly serious is, though its body of vacuum hot water boiler is a negative pressure, and its heat exchange (condensation) part pressure-bearing, just in case leaking appears in heat exchanging part, not only vacuum is difficult to keep, and still has blast, crackle danger, and this is one of traditional vacuum boiler reason of being difficult to promote just.
Three. the content of invention:
Purpose of the present invention: overcome the defective of prior art, the Combined Boiler Drum of Embedded Vacuum Boiler and Vacuum Boilers that a kind of manufacturability is better, intensity is higher and floor space is little is provided.
Technical scheme of the present invention: a kind of embedded vacuum boiler combination drum, contain cylindrical tube, wherein the central shaft of two cylindrical tubes is parallel to each other, the upper and lower cylindrical shell that stacks forms the combination drum along cylindrical tube external surface bus phase embedding each other seal welding, interconnects at phase embedding face two cylindrical shells.
The as a whole cylindrical tube of described lower shell, upper shell are the cylindrical tube of a downside opening, and the two is fixing in the opening part welding, and has intercommunicating pore or connectivity slot on the lower shell body wall in described opening.
The as a whole cylindrical tube of described upper shell, lower shell are the cylindrical tube of a upper side opening, and the two is fixing in the opening part welding, and has intercommunicating pore or connectivity slot on the upper shell body wall in described opening.
Described lower shell is the cylindrical tube of a upper side opening, and upper shell is the cylindrical tube of a downside opening, and the two is fixing in the opening part welding, and forms the connection cavity at described opening part.
Entad angle α between the phase rule of described combination drum both sides is: 90 °～130 °, be provided with stiffener on the lateral wall of described two cylindrical shell interdigitating sections.
A kind of vacuum boiler that contains described embedded vacuum boiler combination drum, it also contains condensing heat-exchange device and heater, wherein on the end walls of the preceding collection case of condensing heat-exchange device and the rear set box last cylindrical tube that is separately fixed at described embedded vacuum boiler combination drum, preceding collection case and rear set box are communicated with by the cluster type heat exchanger tube, be provided with dividing plate at the rear set box middle part, rear set box is divided into, following two chambers, on described, following two chambers respectively with go out, water inlet pipe is communicated with, and in the following cylindrical tube of described embedded vacuum boiler combination drum heater is installed.
The condensing heat-exchange device is one, or it is two, or be more than two, the heat exchanger tube of each condensing unit all is staggered from top to bottom, and collection case and rear set box is welded by closure plate, the tube sheet at circular cylinder body and two ends respectively before it, and circular cylinder body is a round steel pipe, or be welded for steel plate bending, the closure plate of preceding collection case is provided with the maintenance hand hole, and is provided with stiffener on the inwall of this closure plate, and heat exchanger tube is provided with enforced loop plane; Heater is an electrical heating mechanism, or is fuel Heating mechanism, or is coal-fired heating arrangements.
The vacuum automatic control device is installed on cylindrical tube on the described embedded vacuum boiler combination drum, this vacuum automatic control device contains check valve, described check valve one end is communicated with by pipeline and boiler intracavity, the other end connects blow-down pipe, be connected in series with motor-driven valve between check valve and blow-down pipe, the motor-driven valve driving mechanism connects boiler vacuum pressure observing and controlling mechanism by lead.
Boiler vacuum pressure observing and controlling mechanism is the vacuum pressure transmitter and shows control instrument, wherein vacuum pressure transmitter pressure tappings is communicated with by connecting pipe and last cylindrical tube intracoelomic cavity, transmitter output signal lead connects and shows control instrument, the control instrument wire of output terminal connects the motor-driven valve driving mechanism, is connected in parallel to the safety vent valve with check valve and motor-driven valve.
Perhaps boiler vacuum pressure observing and controlling mechanism is an electro connecting pressure gauge, wherein the Pressure gauge pressure tappings is communicated with by connecting pipe and last cylindrical tube intracoelomic cavity, and Pressure gauge electric contact contact output lead connects or connects and connection motor-driven valve driving mechanism power supply by auxiliary reclay or control instrument.
Beneficial effect of the present invention:
1. combination drum manufacturability of the present invention is better, intensity is higher and floor space is little.Adopt the identical cylindrical tube of upper and lower two diameters to fix along its outer surface bus phase embedding each other seal welding, and the phase embedding between two cylindrical shells partly is interconnected, upper shell is a condensation portion, and lower shell is the boiler heating part, and this structure is compared with circular drum, save floor space more than 30%, with oval shape drum specific strength height mutually, good manufacturability, upper and lower cylindrical shell can also be made respectively simultaneously, weld then, therefore easily manufactured.
2. condensing heat-exchange device flow arrangement of the present invention is made flexibly and easily; adopt the cluster type heat exchanger tube directly to be communicated with forward and backward collection case, simple in structure, flexible arrangement; this heat exchanger tube is staggered from top to bottom; and be 2 return structures, good effect of heat exchange, forward and backward in addition collection case adopts seamless steel pipe; its intensity height; tube sheet and closure plate adopt flat tube sheet, make easily, are easy to large-scale production.
3. condensing heat-exchange device technique of the present invention is good, and installation and maintenance is very convenient, and its pipe is arranged and put rationally, and condensing heat-exchange coefficient height is provided with hand hole in addition on the closure plate of preceding collection case, be convenient to maintenance, reduces maintenance cost, improves economic benefit of enterprises simultaneously.
4. condensing heat-exchange device intensity height of the present invention, and cost is lower, on the closure plate of preceding collection case, be provided with stiffener, on heat exchanger tube, be provided with enforced loop plane, all improved structural strength, prolong its service life, and cost of manufacture is lower, compare with case structure, save material about 30%, economic benefit is obvious.
5. vacuum automatic control device of the present invention has increased by one group of vacuum pressure automatic control system on the check valve basis, control system magnetic valve and check-valves (check valve) series connection, control vacuum is more accurate, it is a dynamic process that while vacuum is kept, it is not very strict that each interface, valve seal in the boiler are required, operation maintenance is simple, and is easy to use, safety.
6, vacuum automatic control device of the present invention atmospheric valve capable of being combined, vacuum boiler does not need to install separately atmospheric valve when installing and using this device, easy to install, leak source is few, can effectively guarantee vacuum boiler safety in utilization, reliability, need not increase equipment investment in addition.
7. the present invention is good in economic efficiency.Reduce floor space, save a large amount of investments, for the commerce and trade location of inch of land such as gold, the effect of saving investment is more obvious, and intensity is better in addition, can reduce spoilage, reduces maintenance time and expense, correspondingly increases economic benefit of enterprises.
8. the scope of application of the present invention is wide, and market prospects are good, are easy to promotion and implementation, have favorable economic benefit.
Four. description of drawings:
Fig. 1 is one of embedded vacuum boiler combination drum structural representation
Fig. 2 is two of an embedded vacuum boiler combination drum structural representation
Fig. 3 is three of an embedded vacuum boiler combination drum structural representation
Fig. 4 is four of an embedded vacuum boiler combination drum structural representation
Fig. 5 is the structure chart of vacuum boiler
Fig. 6 is an A-A cutaway view shown in Figure 5
Five. the specific embodiment:
Embodiment one: referring to Fig. 1, among the figure, the upper shell 1 of embedded vacuum boiler combination drum is the cylindrical tube of a downside opening, lower shell 2 is the cylindrical tube of a upper side opening, and the two diameter is identical and fix in this opening part phase embedding seal welding, entad angle α between the two-phase rule is: 90 °, and at opening part formation connection cavity 4.On the lateral wall of two cylindrical shell interdigitating sections, be provided with stiffener 3.
During use, upper shell 1 is a condensation portion, and condensing unit is installed, and lower shell 2 is the boiler heating part, and electro-heat equipment is installed, for the external world provides hot water or steam.
Embodiment two: referring to Fig. 2, numbering is identical with embodiment one among the figure, the meaning of representative is identical, something in common does not repeat, difference is: lower shell 2 as a whole cylindrical tubes, and upper shell 1 is the cylindrical tube of a downside opening, the two is fixed in opening part phase embedding seal welding, and having intercommunicating pore or connectivity slot 5 on 2 body walls of the lower shell in opening, the entad angle α between the two-phase rule is: 120 °.
Embodiment three: referring to Fig. 3, numbering is identical with embodiment one among the figure, the meaning of representative is identical, something in common does not repeat, difference is: lower shell 2 is the cylindrical tube of a upper side opening, and upper shell 1 is one a whole cylindrical tube, and the two is fixed in opening part phase embedding seal welding, and having intercommunicating pore or connectivity slot 5 on 1 body wall of the upper shell in opening, the entad angle α between the two-phase rule is: 110 °.
Embodiment four: referring to Fig. 4, numbering is identical with embodiment one among the figure, and the meaning of representative is identical, something in common does not repeat, difference is: the entad angle α between the two-phase rule is: 130 °, and, on the lateral wall of two cylindrical shell interdigitating sections, do not establish stiffener 3 according to concrete needs.
Embodiment five: referring to Fig. 5 and Fig. 6, numbering is identical with embodiment one among the figure, the meaning of representative is identical, something in common does not repeat, on the end walls of the last cylindrical tube 1 that the preceding collection case 21 of condensing heat-exchange device and rear set box 13 are separately fixed at described embedded vacuum boiler combination drum, preceding collection case 21 and rear set box 13 are communicated with by cluster type heat exchanger tube 22, be provided with dividing plate 15 at rear set box 13 middle parts, rear set box 13 is divided into, following two chambers, on described, following two chambers respectively with go out, water inlet pipe 14,15 are communicated with, heat exchanger tube 22 is staggered from top to bottom, and preceding collection case 21 and rear set box 13 are respectively by the closure plate 20 at circular cylinder body 24 and two ends, tube sheet 18 is welded, circular cylinder body 24 is welded for round steel pipe or for steel plate bending, the closure plate 20 of preceding collection case 21 is provided with maintenance hand hole 17, and be provided with stiffener 19 on the inwall of this closure plate 20, heat exchanger tube 22 is provided with enforced loop plane 23; In the following cylindrical tube 2 of described embedded vacuum boiler combination drum heater 6 is installed.Heater 6 is a fuel Heating mechanism, contains burner hearth and flue, and it is conventional prior art, and concrete structure and duty do not describe in detail, is provided with conventional boiler coupling mechanisms such as water inlet pipe and water outlet pipe in addition in the lower shell 2, is prior art, does not describe in detail.
The vacuum automatic control device is installed on cylindrical tube on the described embedded vacuum boiler combination drum 1, check valve 10 1 ends of this vacuum automatic control device are communicated with by the inner chamber of pipeline with the last cylindrical tube 1 of combination drum, its other end is connected in series with motor-driven valve 9, motor-driven valve 9 connects blow-down pipe 8, and motor-driven valve 9 driving mechanisms are connected by the demonstration control instrument 12 of lead with boiler vacuum pressure observing and controlling mechanism.Pressure transmitter 11 pressure tappings of boiler vacuum pressure observing and controlling mechanism are communicated with by the inner chamber of connecting pipe with the last cylindrical tube 1 of combination drum, and the pressure transmitter 11 output signals of telecommunication connect by lead and show control instrument 12, show that control instrument 12 is connected with power supply by lead.
As required, a cover safety vent valve 7 in parallel is mainly used on the bigger vacuum boiler of heating load on check valve 10 and motor-driven valve 11.As a whole the dispatching from the factory of these element combinations, its parameter is adjusted before dispatching from the factory.Its operation principle is: when stove contained air (inert gas), its swell increment was bigger, and along with the rising of temperature, furnace pressure also raises, and when pressure sensor reached the pressure of a certain setting, magnetic valve 9 was opened automatically and got rid of unnecessary air; When pressure drops to a certain setting value, close magnetic valve 9 automatically, so several times repeatedly, the air that can will enter in the stove is discharged, and forms the certain vacuum degree.Be in operation, if entering air in the stove reaches when a certain amount of, repeat the said process deaeration again, kept the vacuum in the stove, this is a dynamic process, and is therefore lower to the seal request of stove inner joint, valve, simplified the operation maintenance workload, when magnetic valve 9 malfunctioning or heat exchanger leakages, can pass through the safety valve pressure release, guarantee boiler operatiopn safety.
During use, heating arrangements 6 work, vapours heating heat exchanger tube 2 makes water temperature rising in its pipe, is discharged by outlet pipe 5, and after the circulation, water temperature reduces, and is entered in the heat exchanger tube 2 by water inlet pipe 7, continues heating, the formation periodic duty.
Embodiment six: present embodiment and embodiment five are basic identical, something in common does not repeat, difference is: boiler vacuum pressure measure and control device is an electric contact class Pressure gauge, wherein vacuum pressure transmitter pressure tappings is communicated with by connecting pipe and last cylindrical tube intracoelomic cavity, the output of Pressure gauge electric contact contact connects by lead and connection motor-driven valve driving mechanism power supply, perhaps electric contact contact output control connection auxiliary reclay is connected motor-driven valve driving mechanism power supply by auxiliary reclay control.
Can form many fact Examples by the quantity, the form of heater and the form of vacuum pressure measure and control device that change condensing unit, be conventional the variation, not describe in detail one by one at this.
Claims (10)
1. embedded vacuum boiler combination drum, contain cylindrical tube, it is characterized in that: the central shaft of two cylindrical tubes is parallel to each other, and the upper and lower cylindrical shell that stacks forms the combination drum along cylindrical tube external surface bus phase embedding each other seal welding, interconnects at phase embedding face two cylindrical shells.
2. embedded vacuum boiler combination drum according to claim 1, it is characterized in that: the as a whole cylindrical tube of described lower shell, upper shell is the cylindrical tube of a downside opening, the two is fixing in the opening part welding, and has intercommunicating pore or connectivity slot on the lower shell body wall in described opening.
3. embedded vacuum boiler combination drum according to claim 1, it is characterized in that: the as a whole cylindrical tube of described upper shell, lower shell is the cylindrical tube of a upper side opening, the two is fixing in the opening part welding, and has intercommunicating pore or connectivity slot on the upper shell body wall in described opening.
4. embedded vacuum boiler combination drum according to claim 1, it is characterized in that: described lower shell is the cylindrical tube of a upper side opening, upper shell is the cylindrical tube of a downside opening, and the two is fixing in the opening part welding, and forms the connection cavity at described opening part.
5. according to the arbitrary described embedded vacuum boiler combination drum of claim 1～4, it is characterized in that: the entad angle α between the phase rule of described combination drum both sides is: 90 °～130 °, be provided with stiffener on the lateral wall of described two cylindrical shell interdigitating sections.
6. vacuum boiler that contains the described embedded vacuum boiler combination drum of claim 1, it also contains condensing heat-exchange device and heater, it is characterized in that: on the end walls of the last cylindrical tube that the preceding collection case of condensing heat-exchange device and rear set box are separately fixed at described embedded vacuum boiler combination drum, preceding collection case and rear set box are communicated with by the cluster type heat exchanger tube, be provided with dividing plate at the rear set box middle part, rear set box is divided into, following two chambers, on described, following two chambers respectively with go out, water inlet pipe is communicated with, and in the following cylindrical tube of described embedded vacuum boiler combination drum heater is installed.
7. vacuum boiler according to claim 6, it is characterized in that: the condensing heat-exchange device is one, or it is two, or be more than two, the heat exchanger tube of each condensing unit all is staggered from top to bottom, and collection case and rear set box are welded by closure plate, the tube sheet at circular cylinder body and two ends respectively before it, circular cylinder body is a round steel pipe, or be welded for steel plate bending, the closure plate of preceding collection case is provided with the maintenance hand hole, and be provided with stiffener on the inwall of this closure plate, heat exchanger tube is provided with enforced loop plane; Heater is an electrical heating mechanism, or is fuel Heating mechanism, or is coal-fired heating arrangements.
8. according to claim 6 or 7 described vacuum boilers, it is characterized in that: the vacuum automatic control device is installed on cylindrical tube on the described embedded vacuum boiler combination drum, this vacuum automatic control device contains check valve, described check valve one end is communicated with by pipeline and boiler intracavity, the other end connects blow-down pipe, be connected in series with motor-driven valve between check valve and blow-down pipe, the motor-driven valve driving mechanism connects boiler vacuum pressure observing and controlling mechanism by lead.
9. vacuum boiler according to claim 8, it is characterized in that: boiler vacuum pressure observing and controlling mechanism is the vacuum pressure transmitter and shows control instrument, wherein vacuum pressure transmitter pressure tappings is communicated with by connecting pipe and last cylindrical tube intracoelomic cavity, transmitter output signal lead connects and shows control instrument, the control instrument wire of output terminal connects the motor-driven valve driving mechanism, is connected in parallel to the safety vent valve with check valve and motor-driven valve.
10. vacuum boiler according to claim 8, it is characterized in that: boiler vacuum pressure observing and controlling mechanism is an electro connecting pressure gauge, wherein the Pressure gauge pressure tappings is communicated with by connecting pipe and last cylindrical tube intracoelomic cavity, and Pressure gauge electric contact contact output lead connects or connects and connection motor-driven valve driving mechanism power supply by auxiliary reclay or control instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100173660A CN1296654C (en) | 2005-02-06 | 2005-02-06 | Embedded vacuum boiler combination barrel and vacuum boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100173660A CN1296654C (en) | 2005-02-06 | 2005-02-06 | Embedded vacuum boiler combination barrel and vacuum boiler |
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| Publication Number | Publication Date |
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| CN1670429A true CN1670429A (en) | 2005-09-21 |
| CN1296654C CN1296654C (en) | 2007-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100173660A Expired - Fee Related CN1296654C (en) | 2005-02-06 | 2005-02-06 | Embedded vacuum boiler combination barrel and vacuum boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126545B (en) * | 2006-08-18 | 2010-11-17 | 山西通能锅炉有限责任公司 | Vacuum boiler without exhauster |
| CN103245232A (en) * | 2012-02-07 | 2013-08-14 | 朱杰 | High-temperature flue gas waste heat thermal tube recovery system |
| CN107883579A (en) * | 2017-11-01 | 2018-04-06 | 盂县晶辉机械制造有限公司 | A kind of electric heating phase change heater |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5173155A (en) * | 1990-09-28 | 1992-12-22 | Tokyo Gas Co., Ltd | Vacuum boiler type evaporator |
| JPH0633866B2 (en) * | 1990-09-28 | 1994-05-02 | 東京瓦斯株式会社 | Decompression boiler type vaporizer |
| CN2202247Y (en) * | 1994-07-06 | 1995-06-28 | 刘翔 | Horizontal double-drum steam boiler |
| CN2604651Y (en) * | 2003-03-19 | 2004-02-25 | 冀东石油勘探开发公司 | Oil and gas fuel vacuum boiler |
| CN2779249Y (en) * | 2005-02-06 | 2006-05-10 | 河南德润锅炉有限公司 | Embedding vacuum boiler combined barrel |
-
2005
- 2005-02-06 CN CNB2005100173660A patent/CN1296654C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126545B (en) * | 2006-08-18 | 2010-11-17 | 山西通能锅炉有限责任公司 | Vacuum boiler without exhauster |
| CN103245232A (en) * | 2012-02-07 | 2013-08-14 | 朱杰 | High-temperature flue gas waste heat thermal tube recovery system |
| CN107883579A (en) * | 2017-11-01 | 2018-04-06 | 盂县晶辉机械制造有限公司 | A kind of electric heating phase change heater |
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| Publication number | Publication date |
|---|---|
| CN1296654C (en) | 2007-01-24 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Aoke Xingyuan Technology Enterprise Incubator Co., Ltd. Assignor: Henan Derun Boiler Co., Ltd. Contract fulfillment period: 2007.4.1 to 2015.2.5 contract change Contract record no.: 2008110000023 Denomination of invention: Embedded vacuum boiler combination barrel and vacuum boiler Granted publication date: 20070124 License type: Exclusive license Record date: 2008.9.26 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.4.1 TO 2015.2.5 Name of requester: BEIJING AOKE XINGYUAN-TECH BUSINESS INCUBATOR CO. Effective date: 20080926 |
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| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Beijing Aoke Xingyuan Technology Enterprise Incubator Co., Ltd. Assignor: Henan Derun Boiler Co., Ltd. Contract record no.: 2008110000023 Date of cancellation: 20120831 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070124 Termination date: 20150206 |
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| EXPY | Termination of patent right or utility model |