CN2900997Y - Gas transport pipeline cleaner receiving and delivering device - Google Patents
Gas transport pipeline cleaner receiving and delivering device Download PDFInfo
- Publication number
- CN2900997Y CN2900997Y CN 200620115844 CN200620115844U CN2900997Y CN 2900997 Y CN2900997 Y CN 2900997Y CN 200620115844 CN200620115844 CN 200620115844 CN 200620115844 U CN200620115844 U CN 200620115844U CN 2900997 Y CN2900997 Y CN 2900997Y
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- pallet
- connecting rod
- cylinder
- wiper
- gas pipeline
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- Expired - Lifetime
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Abstract
The utility model is a special equipment for a auto transmitting and receiving pipe cleaner of a long distance oil and gas pipeline which comprises a host machine, a lifting gearing, a pallet, a pushing and drawing mechanism, a relay connecting bar and an excessive dial. The pallet is of semi-cylindrical shape, and the other end of the pallet is connected with a hydraulic lifting cylinder. The excessive dial is cabochon, one end of which has a semi-circular flange connected with the semi-circular flange of the pallet. The pushing and drawing mechanism consists of two sets of hydraulic cylinders and balance connecting bars, the two sets of hydraulic cylinders are separately mounted on the two sides of the semi-cylindrical on the pallet through the foot stool. The expansion links of the two sets of hydraulic cylinders are connected with a balance coupling bar on the top end, the balance coupling bar consists of a connector, an intermediate connecting rod and a push-pull dial, wherein the connector is connected with the expansion link of the hydraulic cylinder, the push-pull dial is fixed on the centre of the intermediate connecting rod through the bolt. The pipe cleaner transmitting and receiving device has the functions of carrying and lifting and can push and draw the sweeper, thereby realizing the mechanical operation of the pipe cleaner.
Description
Affiliated technical field
The utility model relates to a kind of inner wall cleaning technical field of growing apart from oil and gas pipeline, particularly a kind of automatic transmitting-receiving special device of mechanical wiper.
Background technique
At present, diameter is that the weight of 711 millimeters pipelines machinery wipers is generally about 250kg.When the smaller wiper of diameter is received and dispatched process, carry out manual work transmitting-receiving wiper and can realize, just waste time and energy.Along with the oil and gas pipeline diameter increases, the weight of wiper also increases, and takes handwork transmitting-receiving wiper can not adapt to, and the pipeline cleaner that the transmitting-receiving diameter is bigger is very difficult.According to present both at home and abroad wiper manufacturer statistics, diameter is that the mechanical wiper weight of 1016 millimeters pipelines is generally about 900kg.The wiper inconvenient operation is sent into or taken out to a dead lift, lifting wiper, and dangerous.In that so gas transmission station pigging operation of gas is arranged, must have explosion precaution.At present, the equipment at explosion risk zone operation transmitting-receiving wiper does not have explosion-proof; Often damage the sealing surface of transmitting-receiving tube fast-opening blind during the transmitting-receiving wiper.
Receive the process of wiper, just wiper is pushed pipeline transmitting-receiving wiper tube; Send out the process of wiper, just wiper is pulled out in pipeline transmitting-receiving wiper tube.How safety transmitting-receiving large-diameter pipeline wiper is a technical barrier that urgency is to be solved.The transmitting-receiving work of large-diameter pipeline wiper has only the mechanization of employing operation to finish smoothly.
The model utility content
In order to adapt to major diameter, long apart from the work of oil and gas pipeline inner wall cleaning, realize pigging operation mechanization, improve oil and gas pipeline wiper manual work situation for many years, overcome the deficiency of artificial transmitting-receiving wiper, the utility model provides the gas pipeline pig traps of a kind of suitable gas transmission station pigging operation.This pig traps can not only be finished the transmitting-receiving of pipeline machinery wiper, and possesses the saving manpower, has explosion-proof performance, has the effect of protection transmitting-receiving tube fast-opening blind sealing surface.
The technical solution adopted in the utility model is:
The gas pipeline pig traps is made up of main frame, elevator mechanism, propelling haulage gear, pallet, relay connecting rod, balancing pull rod.
Main frame has mainframe, is fixed with explosive-proof hydraulic station and explosive-proof hydraulic control system on mainframe, is fixed with retarder and roller that explosion-proof direct current generator drives on the mainframe, can walk under direct current generator drives.
Elevator mechanism is made up of lifting frame and hydraulic lifting cylinder, and lifting frame is vertically fixed on the both sides of mainframe.Hydraulic lifting cylinder is fixed in the middle of the lifting frame.Hydraulic lifting cylinder is connected with pallet.
Pallet is a semi-cylindrical shaped, is assembly welding framework independently, can place circular mechanical wiper.Semi-cylindrical shaped structure pallet can reduce the pressure of outer round rubber (polyurethane) sealing surface of wiper and rubbing surface, and protection wiper cylindrical sealing surface is injury-free.Pallet one end is fixed semicircle flange, and flange connected scale.The pallet the other end connects hydraulic lifting cylinder.When the operation of transmitting-receiving wiper, crossing scale can overlap with the transmitting-receiving wiper tube of pipeline.The pallet effect is to support to advance haulage gear, and the carrying wiper connected scale.Crossing scale is arc surfaced, and there is semicircle flange an end outside, is connected with pallet.Cross the scale outer surface and can serve as a contrast polyurethane and conductive rubber, friction causes Mars during the prevention contact.
Advance haulage gear to be become with the balance connection rod set by two cover oil hydraulic cylinders, two cover oil hydraulic cylinders adopt foot rest to be installed in pallet semi-cylindrical shaped both sides respectively.One end of the fixed-directions of two cover oil hydraulic cylinders are cylinder ends in the connection on chassis scale, flexible rod end is at an end that connects hydraulic lifting cylinder.Be to receive wiper when flexible rod is released like this, be a wiper when retracting.
Two cover oil hydraulic cylinder flexible rod tops are connected with balancing pull rod.Balancing pull rod is made up of connecting head, intermediate connecting rod, push-and-pull dish.Connecting head connects the flexible rod of oil hydraulic cylinder.
In order to adapt to the weight of receiving and dispatching relatively large wiper, advancing two of haulage gear to overlap the cylinder pressure scopes can be at 10-16MPa, and cylinder diameter is 45-80mm, and flexible rod diameter 30-50mm, hydraulic cylinder travel are 450-550mm.
In order to adapt to the length of receiving and dispatching relatively large wiper, between intermediate connecting rod and push-and-pull dish, the relay bar can be arranged, the relay bar is a steel pipe, and inside and outside two-layer pipe is arranged, there is the inner tube fixed pin shaft at the external pipe two ends.The relay pole length is between 500-1000mm.When being 500mm length as the relay bar, inner sleeve is 450mm; When the relay pole length was 1000mm, interior cover length was 950mm.
The beneficial effects of the utility model:
1, the gas pipeline pig traps has carrying, lifting function: wiper be contained on this equipment can be in defeated oil-gas stations short-haul operation, the speed of travel requires greater than 8 kilometers/hour, possesses the function of carrying the following wiper of 1500kg.When sending out the wiper operation, need constantly to adjust pallet height, this device has good lifting and function of regulating height thereof.
2, the gas pipeline pig traps is from heavy and light (800-1200kg).
3, can be in the operation of explosion risk zone: pig traps has explosion-proof.
4, have the function that advances and draw wiper, the stroke of transmitting-receiving wiper is 500mm.This function can realize the wiper transmitting-receiving, realizes pigging machinery equalization.
5, the gas pipeline pig traps is equipped with corresponding transmitting-receiving wiper to cross scale, crosses scale outer lining abrasion resistant polyurethane rubber plate, can be when the transmitting-receiving wiper, protection transmitting-receiving wiper tube fast-opening blind sealing surface, safety receive and dispatch the wiper operation.
Said structure of the present utility model has bigger improvement, meets long inner wall cleaning transmitting-receiving wiper job requirements apart from oil and gas pipeline fully, is a new and innovative, progressive, practical new design.
The utility model is described in further detail below in conjunction with drawings and the specific embodiments.
Description of drawings
Fig. 1 is the utility model gas pipeline pig traps overall structure schematic representation; It is pig traps job state schematic representation.Wiper (5) and transmitting-receiving wiper tube (6) do not belong to this
The model utility content.
Fig. 2 is pallet (4) plan view of gas pipeline pig traps.
Fig. 3 is the left view of Fig. 2.
Fig. 4 is the plan view of Fig. 2.
Fig. 5 is balancing pull rod (9) schematic representation of gas pipeline pig traps.
Fig. 6 is the plan view of Fig. 5.
Among the figure, 1. main frame, 2. elevator mechanism, 3. propelling haulage gear, 4. pallet, 5. wiper, 6. transmitting-receiving wiper tube is 7. crossed scale, 8. relay connecting rod, 9. balancing pull rod, 10. flexible rod, 11. oil hydraulic cylinders, 12. flange, 13. foot rests, 14. connecting heads, 15. intermediate connecting rod, 16. push-and-pull dishes, 17. relay connecting rods.
Embodiment
Embodiment: consult accompanying drawing 1.Can receive and dispatch diameter is 1016mm, and the weight position is an example at the transmitterreceiver appliance of the pipeline machinery wiper of 900kg, describes.The utility model gas pipeline pig traps is made up of main frame (1), elevator mechanism (2), propelling haulage gear (3), pallet (4), relay connecting rod (8), balancing pull rod (9).Automatic send receiver is a modular organization, and promptly main frame (1) is separable with pallet (4), and is separable with elevator mechanism (2), and connected element adopts high-strength bolt fastening.
Main frame (1) has mainframe, is fixed with explosive-proof hydraulic pumping plant and explosive-proof hydraulic control system on mainframe.Adopt the small-sized electric hydraulic power unit, the design of Hydraulic System discharge capacity is 12.5ml/r, and Maximum operating pressure is 16MPa, and hydraulic system hydraulic pressure can be assigned to hydraulic lifting cylinder, advance the oil hydraulic cylinder of haulage gear (3).
Be fixed with retarder and roller that explosion-proof direct current generator drives on the mainframe.
Elevator mechanism (2) is made up of lifting frame and hydraulic lifting cylinder, and lifting frame is two upright columns, and height 2500mm is vertically fixed on the both sides of mainframe.Hydraulic lifting cylinder is fixed in the middle of the lifting frame.Hydraulic lifting cylinder is connected with pallet (4).
Consult accompanying drawing 2, accompanying drawing 3 and accompanying drawing 4.Pallet (4) is a semi-cylindrical shaped, the internal diameter 510mm of pallet (4).Pallet (13) one ends are fixed semicircle flange (12), and flange (12) connected scale (7).Pallet (13) is the gang welding form structure, has the intensity height, and volume is little, lightweight characteristics, and sheet material adopts 8mm high-strength cold rolling plate, plasma cutting stock.Pallet (13) the other end connects hydraulic lifting cylinder.Crossing scale (7) can overlap with the transmitting-receiving wiper tube (6) of pipeline.Crossing scale (7) is arc surfaced, and there is semicircle flange (12) an end outside, is connected with the semicircle flange of pallet (13) (12).Transmitting-receiving wiper tube (4) fast-opening blind flange has its particularity, and inner peripheral surface does not allow any damage.Adopt the transmitting-receiving wiper to cross scale (7) and realize safety work, promptly adopting polyurethane and conductive rubber is that outer lining is crossed scale (7) surface.
Advance haulage gear (3) to be made up of two cover oil hydraulic cylinders (11) and balanced connecting rod (9), two cover oil hydraulic cylinders (11) adopt foot rest (13) to be installed in pallet (4) semi-cylindrical shaped both sides respectively.One end of the fixed-directions of two cover oil hydraulic cylinders (11) are cylinder ends in the connection of pallet (4) scale (7), flexible rod (10) end is at an end that connects hydraulic elevating system (2).Two cover oil hydraulic cylinder (11) pressure ranges can be at 10-16MPa, and cylinder diameter is diameter 63mm, and flexible rod (10) diameter is 45mm, and oil hydraulic cylinder (11) stroke is 500mm, maximum propelling force: 14700N (1500kg), the fastest fltting speed: 0.05m/s.
Flexible rod (10) top of two cover oil hydraulic cylinders (11) is connected with balancing pull rod (9).Balancing pull rod (9) is made up of connecting head (14), intermediate connecting rod (15), push-and-pull dish (16).Connecting head (14) connects the flexible rod (10) of oil hydraulic cylinder (11).Push-and-pull dish (16) is by being bolted to the center of intermediate connecting rod (15).Consult accompanying drawing 5 and accompanying drawing 6.For realizing advancing synchronously or the traction wiper, balanced connecting rod (9) is the assembly welding structure, and connecting head (14) is that 2 root beads connect square casing (60.1 * 60.1), and long 200mm is enclosed within intermediate connecting rod (15) two ends.Push-and-pull dish (16) is fastened on intermediate connecting rod (15) center by bolt connection, docks with relay connecting rod (17).Relay connecting rod (17) is a steel pipe, and two-layer inside and outside having, there is the inner tube fixed pin shaft at the external pipe two ends.Relay connecting rod (17) is 500mm, and inner sleeve length is 450mm;
The gross weight of gas pipeline pig traps is about 900kg.
Gas pipeline pig traps using method:
Send wiper (5) process: wiper (5) is lifted on the gas pipeline pig traps pallet (4), also transmitting-receiving pallet (4) can be pulled down from equipment, wiper (5) is installed on the transmitting-receiving wiper pallet (4) with lowering or hoisting gear.Start the walking switch then, parallel to go to pipeline transmitting-receiving wiper tube (6) preceding, promotes pig traps pallet (5), and it is identical to make scale (7) height and pipeline send out wiper tube (6) bottom level.Opening conduits is sent out wiper tube (6) fast-opening blind, will cross scale (7) and snap on transmitting-receiving wiper tube (6) mouth.With advancing haulage gear oil hydraulic cylinder (11), wiper is pushed in the pipeline transmitting-receiving wiper tube (6).Use relay connecting rod (17) to shift wiper (5) onto transmitting-receiving wiper tube (6) CONCENTRIC REDUCER place simultaneously.Pig traps retreats, and shuts fast-opening blind.
Reclaim wiper (5) process: when receiving wiper, opening conduits transmitting-receiving wiper tube (6) fast-opening blind will connect scale (7) with the gas pipeline pig traps and aim at transmitting-receiving wiper tube (6) port.Connect wiper (5) and relay connecting rod (8).With advancing haulage gear oil hydraulic cylinder (11), wiper (5) with pulling out pipeline transmitting-receiving wiper tube (6), is arrived on the pallet (4).Pig traps retreats, and shuts fast-opening blind.
Claims (7)
1, a kind of gas pipeline pig traps is made up of main frame (1), elevator mechanism (2), propelling haulage gear (3), pallet (4), relay connecting rod (8), balancing pull rod (9),
Main frame (1) has mainframe, is fixed with explosive-proof hydraulic station and explosive-proof hydraulic control system on mainframe, is fixed with retarder and roller that explosion-proof direct current generator drives on the mainframe, it is characterized in that:
Elevator mechanism (2) is made up of lifting frame and hydraulic lifting cylinder, and lifting frame is vertically fixed on the both sides of mainframe, and hydraulic lifting cylinder is fixed in the middle of the lifting frame, and hydraulic lifting cylinder is connected with pallet (4),
Pallet (4) is a semi-cylindrical shaped, pallet (13) one ends are fixed semicircle flange (12), flange (12) connected scale (7), pallet (13) the other end connects hydraulic lifting cylinder, crossing scale (7) can overlap with the transmitting-receiving wiper tube (6) of pipeline, and crossing scale (7) is arc surfaced, and there is semicircle flange (12) an end outside, be connected with pallet (13)
Advance haulage gear to form by two cover oil hydraulic cylinders (11) and balanced connecting rod (9), two cover oil hydraulic cylinders (11) adopt foot rest (13) to be installed in pallet (4) semi-cylindrical shaped both sides respectively, one end of the fixed-directions of two cover oil hydraulic cylinders (11) are cylinder ends in the connection of pallet (4) scale (7), flexible rod end is at an end that connects hydraulic elevating system (2)
Flexible rod (10) top of two cover oil hydraulic cylinders (11) is connected with balancing pull rod (9), and balancing pull rod (9) is made up of connecting head (14), intermediate connecting rod (15), push-and-pull dish (16), and connecting head (14) connects the flexible rod (10) of oil hydraulic cylinder (11).
2, gas pipeline pig traps according to claim 1, it is characterized in that: advancing two of haulage gear (3) to overlap oil hydraulic cylinder (11) pressure ranges can be at 10-16MPa, cylinder diameter is 45-80mm, and flexible rod diameter 30-50mm, hydraulic cylinder travel are 450-550mm.
3, gas pipeline pig traps according to claim 2 is characterized in that: cylinder diameter is diameter 63mm, and flexible rod (10) diameter is 45mm, and oil hydraulic cylinder (11) stroke is 500mm.
4, gas pipeline pig traps according to claim 1 and 2, it is characterized in that: on the push-and-pull dish (16) of intermediate connecting rod (15), relay connecting rod (17) is arranged, relay connecting rod (17) is a steel pipe, have inside and outside two-layer, there is the inner tube fixed pin shaft at the external pipe two ends, and relay connecting rod (17) length is between 500-1000mm.
5, gas pipeline pig traps according to claim 4 is characterized in that: when relay connecting rod (17) was grown for 500mm, inner sleeve length was 450mm.
6, gas pipeline pig traps according to claim 4 is characterized in that: when relay connecting rod (17) length was 1000mm, inner sleeve length was 950mm.
7, gas pipeline pig traps according to claim 1 and 2 is characterized in that: cross scale (7) outer surface and be lined with polyurethane and conductive rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620115844 CN2900997Y (en) | 2006-05-18 | 2006-05-18 | Gas transport pipeline cleaner receiving and delivering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620115844 CN2900997Y (en) | 2006-05-18 | 2006-05-18 | Gas transport pipeline cleaner receiving and delivering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2900997Y true CN2900997Y (en) | 2007-05-16 |
Family
ID=38085161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620115844 Expired - Lifetime CN2900997Y (en) | 2006-05-18 | 2006-05-18 | Gas transport pipeline cleaner receiving and delivering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2900997Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390096A (en) * | 2014-11-14 | 2015-03-04 | 上海海隆石油钻具有限公司 | Trolley for receiving and dispatching oil and gas pipeline detection equipment |
| CN104633389A (en) * | 2015-01-28 | 2015-05-20 | 西安长庆科技工程有限责任公司 | Movable tube cleaner receiving and dispatching skid-mounted device |
| CN104948723A (en) * | 2015-05-11 | 2015-09-30 | 夏云美 | Hydraulic control rod of cycloidal pin gear speed reducer |
| CN106424037A (en) * | 2016-11-05 | 2017-02-22 | 西南石油大学 | Pipe cleaner ball serving device |
| CN107883116A (en) * | 2017-11-27 | 2018-04-06 | 中国海洋石油集团有限公司 | A kind of pipeline cleaning and interior detection pallet of pushing the ball |
| CN108506638A (en) * | 2018-03-21 | 2018-09-07 | 北京市燃气集团有限责任公司 | Receipts system and method is put in detection robot in gas pipeline |
| CN109108014A (en) * | 2017-06-26 | 2019-01-01 | 中国石油天然气股份有限公司 | Pipe cleaner ball serving device |
| CN110834016A (en) * | 2018-08-16 | 2020-02-25 | 中国石油化工股份有限公司 | Tube cleaner stabilizing device for ball receiving and dispatching barrel |
| CN111375610A (en) * | 2018-12-28 | 2020-07-07 | 中国石油天然气股份有限公司 | Pipeline cleaning system |
| CN111375609A (en) * | 2018-12-28 | 2020-07-07 | 中国石油天然气股份有限公司 | Pipeline cleaning process |
| CN111570444A (en) * | 2019-02-16 | 2020-08-25 | 中国石油天然气股份有限公司 | Ball collecting device |
| CN112122188A (en) * | 2020-09-14 | 2020-12-25 | 湖北天高桥梁工程有限公司 | Welding attachment cleaning device and method and welding system |
-
2006
- 2006-05-18 CN CN 200620115844 patent/CN2900997Y/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390096A (en) * | 2014-11-14 | 2015-03-04 | 上海海隆石油钻具有限公司 | Trolley for receiving and dispatching oil and gas pipeline detection equipment |
| CN104633389A (en) * | 2015-01-28 | 2015-05-20 | 西安长庆科技工程有限责任公司 | Movable tube cleaner receiving and dispatching skid-mounted device |
| CN104633389B (en) * | 2015-01-28 | 2016-09-14 | 西安长庆科技工程有限责任公司 | A kind of movably wiper transmitting-receiving skid-mounted unit |
| CN104948723A (en) * | 2015-05-11 | 2015-09-30 | 夏云美 | Hydraulic control rod of cycloidal pin gear speed reducer |
| CN106424037B (en) * | 2016-11-05 | 2018-09-28 | 西南石油大学 | A kind of wiper ball serving device |
| CN106424037A (en) * | 2016-11-05 | 2017-02-22 | 西南石油大学 | Pipe cleaner ball serving device |
| CN109108014A (en) * | 2017-06-26 | 2019-01-01 | 中国石油天然气股份有限公司 | Pipe cleaner ball serving device |
| CN109108014B (en) * | 2017-06-26 | 2023-09-26 | 中国石油天然气股份有限公司 | Ball-serving device of pipe cleaner |
| CN107883116A (en) * | 2017-11-27 | 2018-04-06 | 中国海洋石油集团有限公司 | A kind of pipeline cleaning and interior detection pallet of pushing the ball |
| CN107883116B (en) * | 2017-11-27 | 2020-02-14 | 中国海洋石油集团有限公司 | Pipeline pigging and internal detection push ball tray |
| CN108506638A (en) * | 2018-03-21 | 2018-09-07 | 北京市燃气集团有限责任公司 | Receipts system and method is put in detection robot in gas pipeline |
| CN108506638B (en) * | 2018-03-21 | 2019-03-08 | 北京市燃气集团有限责任公司 | Receipts system and method is put in detection robot in gas pipeline |
| CN110834016A (en) * | 2018-08-16 | 2020-02-25 | 中国石油化工股份有限公司 | Tube cleaner stabilizing device for ball receiving and dispatching barrel |
| CN111375610A (en) * | 2018-12-28 | 2020-07-07 | 中国石油天然气股份有限公司 | Pipeline cleaning system |
| CN111375609A (en) * | 2018-12-28 | 2020-07-07 | 中国石油天然气股份有限公司 | Pipeline cleaning process |
| CN111570444A (en) * | 2019-02-16 | 2020-08-25 | 中国石油天然气股份有限公司 | Ball collecting device |
| CN111570444B (en) * | 2019-02-16 | 2021-04-30 | 中国石油天然气股份有限公司 | Ball collecting device |
| CN112122188A (en) * | 2020-09-14 | 2020-12-25 | 湖北天高桥梁工程有限公司 | Welding attachment cleaning device and method and welding system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA PETROLEUM +. NATURAL GAS CO., LTD. Free format text: FORMER OWNER: HUAYOU NATURAL-GAS CO., LTD., BEIJING Effective date: 20120109 Owner name: CNPC BEIJING NATURAL GAS PIPELINE CO., LTD. Effective date: 20120109 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100101 CHAOYANG, BEIJING TO: 100007 DONGCHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120109 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Co-patentee after: Petro China Beijing Natural Gas Pipeline Co., Ltd. Patentee after: China Petroleum & Natural Gas Co., Ltd. Address before: 100101 Beijing city Chaoyang District Datun Road No. 9 Patentee before: Huayou Natural-Gas Co., Ltd., Beijing |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070516 |
|
| EXPY | Termination of patent right or utility model |