CN115824341A - Natural gas metering device - Google Patents
Natural gas metering device Download PDFInfo
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- CN115824341A CN115824341A CN202310165387.5A CN202310165387A CN115824341A CN 115824341 A CN115824341 A CN 115824341A CN 202310165387 A CN202310165387 A CN 202310165387A CN 115824341 A CN115824341 A CN 115824341A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The invention relates to the technical field of natural gas metering, and provides a natural gas metering device which comprises a natural gas metering instrument, a protective shell, a first protective component and a second protective component, wherein the natural gas metering instrument is arranged in the protective shell, a natural gas inlet pipe and a natural gas outlet pipe are fixedly connected to two ends of the natural gas metering instrument respectively, the natural gas inlet pipe and the natural gas outlet pipe are connected with a natural gas pipeline respectively, the first protective component comprises a first protective plate and an arc-shaped shell, the first protective plate and the arc-shaped shell are fixedly connected, the first protective plate and the arc-shaped shell are located on the outer side and the inner side of the protective shell respectively, the natural gas inlet pipe and the natural gas outlet pipe penetrate through the first protective plate and the arc-shaped shell, the second protective component is arranged between two adjacent first protective plates, and the second protective component is connected with one side of the arc-shaped shell, so that the natural gas metering instrument inside is prevented from being damaged to the greatest extent, and the natural gas metering device has the characteristics of good buffering effect and strong anti-impact capability.
Description
Technical Field
The invention relates to the technical field of natural gas metering, in particular to a natural gas metering device.
Background
The natural gas is mainly used as fuel, can be used for producing carbon black, chemicals and liquefied petroleum gas, propane and butane produced by natural gas are important raw materials of modern industry, the natural gas is mainly formed by mixing gaseous low molecular hydrocarbon and non-hydrocarbon gas, and the function of the natural gas metering device is to measure and record the gas flow in a pipeline.
The existing natural gas metering device is generally directly installed on a wall surface or the surface of a building object, when moving objects such as vehicles and the like exist around, when the moving objects impact the natural gas metering device in an unexpected situation, because the existing natural gas metering device has poor protection effect, the impact force generated when the moving objects impact the natural gas metering device easily causes the damage of the metering device.
Disclosure of Invention
In order to achieve the above object, the present invention provides a natural gas metering device, which includes a natural gas meter, a protective shell, a first protective assembly and a second protective assembly, wherein the natural gas meter is installed in the protective shell, a natural gas inlet pipe and a natural gas outlet pipe are respectively fixedly connected to two ends of the natural gas meter, the natural gas inlet pipe and the natural gas outlet pipe are respectively connected to a natural gas pipeline, the first protective assembly includes a first protective plate and an arc-shaped shell, the first protective plate and the arc-shaped shell are fixedly connected, the first protective plate and the arc-shaped shell are respectively located at the outer side and the inner side of the protective shell, the natural gas inlet pipe and the natural gas outlet pipe penetrate through the first protective plate and the arc-shaped shell, the second protective assembly is disposed between two adjacent first protective plates, and the second protective assembly is connected to the arc-shaped shell.
As a further scheme of the present invention, the first protection assembly further includes an elastic plate, two ends of the elastic plate are respectively slidably connected in two adjacent arc-shaped housings, a first buffer member is disposed in each arc-shaped housing, one end of the first buffer member is connected to the elastic plate, and the second protection assembly is connected to the surface of the elastic plate in each arc-shaped housing.
As a further aspect of the present invention, the first protection assembly further includes a fixed pipe and a second buffer member, the fixed pipe is fixedly connected between the first protection plate and the arc-shaped housing, two ends of the fixed pipe respectively penetrate through the first protection plate and the arc-shaped housing, the natural gas inlet pipe and the natural gas outlet pipe penetrate through the fixed pipe, the other end of the first buffer member is connected to a surface of the fixed pipe, the second buffer member is movably sleeved on a surface of the fixed pipe, the fixed pipe is slidably connected to a surface of the protection housing, when an external moving object impacts the protection housing from a direction of the first protection plate, an impact force drives the first protection plate, the fixed pipe and the arc-shaped housing to move towards the natural gas meter, due to the second buffer member, a moving distance of the arc-shaped housing can be shortened, when the arc-shaped housing moves towards the natural gas meter, the arc-shaped housing can drive the elastic plate to move together towards a direction of the natural gas meter, meanwhile, an end portion of the elastic plate can also slide towards an inside of the arc-shaped housing, and the first protection assembly and the second protection assembly can weaken a function of the first protection plate when the external moving object impacts the protection housing from a direction of the first protection plate.
As a further scheme of the invention, the second protection assembly comprises a second protection plate, a rack plate, a rotating shaft, a gear, a winding wheel and a traction wire, the rack plate is fixedly connected to the inner side of the second protection plate, the gear and the winding wheel are fixedly connected to the surface of the rotating shaft, two ends of the rotating shaft are installed on the inner wall of the protection shell, the rack plate is meshed with the gear, one end of the traction wire is wound on the surface of the winding wheel, and the other end of the traction wire is connected with the surface of the elastic plate.
As a further scheme of the invention, the inner wall of the second protection plate is further fixedly connected with a balance plate, the rack plate and the balance plate are both in sliding connection with the side wall of the protection shell, a third buffer member is movably sleeved on the surfaces of the rack plate and the balance plate, two ends of the third buffer member are respectively connected with the second protection plate and the protection shell, when an external moving object impacts the protection shell from the direction of the second protection plate, the impact force drives the second protection plate and the rack plate to move towards the direction close to the natural gas meter, firstly, the second protection plate can compress the third buffer member in the moving process to play a role in buffering and impact weakening, secondly, the moving rack plate can drive the winding wheel to rotate through the gear, the rotating winding wheel can wind the traction wire, further, the elastic plate is driven to be in bending deformation through the traction wire, the elastic plate in bending deformation can slide towards the outer side of the arc-shaped shell, the sliding elastic plate can pull the first buffer member, and the elastic plate in bending deformation and the first buffer member play a role in buffering and impact weakening effect, so that the internal natural gas meter can be prevented from being damaged to the greatest extent, and the characteristics of good in buffering effect and strong in impact resistance are achieved.
As a further aspect of the present invention, the first, second, and third buffering members are springs or elastic rubber sleeves.
As a further scheme of the invention, a sealing cover is movably connected to the surface of the protective shell, and a transparent area is arranged on the surface of the sealing cover at a position corresponding to the natural gas metering instrument.
The invention has the beneficial effects that: when external moving object from the direction striking protective housing of first guard plate, the effect of first guard plate striking force can be weakened to the second protective assembly, when external moving object from the direction striking protective housing of second protective assembly, the effect of second protective assembly striking force can be weakened to first protective assembly to furthest prevents that inside natural gas measurement appearance from receiving the damage, possesses the effectual and anti striking strong characteristics of buffering.
Drawings
Fig. 1 is a schematic structural diagram of a natural gas metering device according to an embodiment of the present invention.
Fig. 2 is a plan view of a natural gas meter according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a first protection component in an embodiment of the present invention.
Fig. 4 is a perspective view of a second shield assembly in an embodiment of the present invention.
Fig. 5 is an assembly schematic diagram of a natural gas meter, a first shield assembly, and a second shield assembly in an embodiment of the invention.
Fig. 6 is a perspective view of a natural gas metering device according to an embodiment of the present invention.
Reference numerals: the natural gas meter comprises a 1-natural gas meter, a 11-natural gas inlet pipe, a 12-natural gas outlet pipe, a 2-protective shell, a 21-sealing cover, a 211-transparent area, a 3-first protective component, a 31-fixed pipe, a 32-first protective plate, a 33-arc shell, a 331-first buffer, a 34-second buffer, a 35-elastic plate, a 4-second protective component, a 41-second protective plate, a 42-rack plate, a 43-rotating shaft, a 44-gear, a 45-winding wheel, a 46-traction line, a 47-balance plate and a 48-third buffer.
Detailed description of the preferred embodiments
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
Referring to fig. 1 to 6, a natural gas metering device according to an embodiment of the present invention includes a natural gas meter 1, a protective housing 2, a first protective assembly 3, and a second protective assembly 4, where the natural gas meter 1 is installed in the protective housing 2, a natural gas inlet pipe 11 and a natural gas outlet pipe 12 are respectively fixedly connected to two ends of the natural gas meter 1, the natural gas inlet pipe 11 and the natural gas outlet pipe 12 are respectively connected to a natural gas pipeline, the first protective assembly 3 includes a first protective plate 32 and an arc-shaped housing 33, the first protective plate 32 and the arc-shaped housing 33 are fixedly connected to each other, the first protective plate 32 and the arc-shaped housing 33 are respectively located at the outer side and the inner side of the protective housing 2, the natural gas inlet pipe 11 and the natural gas outlet pipe 12 penetrate through the first protective plate 32 and the arc-shaped housing 33, the second protective assembly 4 is disposed between two adjacent first protective plates 32, and the second protective assembly 4 is connected to the arc-shaped housing 33.
Further, first protection component 3 still includes elastic plate 35, sliding connection is in two adjacent arc casings 33 respectively at the both ends of elastic plate 35, be provided with first bolster 331 in the arc casing 33, the one end and the elastic plate 35 of first bolster 331 are connected, elastic plate 35 surface connection in second protection component 4 and the arc casing 33.
Further, first protection component 3 still includes fixed pipe 31 and second bolster 34, fixed pipe 31 fixed connection is between first guard plate 32 and arc casing 33, and first guard plate 32 and arc casing 33 are run through respectively at the both ends of fixed pipe 31, the natural gas advances pipe 11 and natural gas exit tube 12 and runs through fixed pipe 31, the other end and the fixed pipe 31 surface connection of first bolster 331, the movable sleeve of second bolster 34 is established on fixed pipe 31 surface, fixed pipe 31 and 2 surface sliding connection of protective housing.
Further, the first, second and third buffers 331, 34, 48 are springs or elastic rubber sleeves.
In the embodiment of the present invention, when an external moving object impacts the protective case 2 from the direction of the first protective plate 32, the impact force drives the first protective plate 32, the fixed pipe 31 and the arc-shaped case 33 to move towards the natural gas meter 1, due to the second buffer member 34, the moving distance of the arc-shaped case 33 can be shortened, when the arc-shaped case 33 moves towards the natural gas meter 1, the arc-shaped case 33 will drive the elastic plate 35 to move towards the natural gas meter 1 together, and at the same time, the end of the elastic plate 35 will slide towards the inside of the arc-shaped case 33, and the first protective assembly 3 and the second protective assembly 4 are connected in a combined manner, when the external moving object impacts the protective case 2 from the direction of the first protective plate 32, the second protective assembly 4 can act to weaken the impact force of the first protective plate 32, and when the external moving object impacts the protective case 2 from the direction of the second protective assembly 4, the first protective assembly 3 can act to weaken the impact force of the second protective assembly 4, thereby maximally preventing the natural gas meter 1 inside from being damaged, and having the characteristics of good buffering effect and strong impact resistance.
Referring to fig. 1 to 5, in an embodiment of the present invention, the second protection assembly 4 includes a second protection plate 41, a rack plate 42, a rotating shaft 43, a gear 44, a winding wheel 45 and a pull wire 46, the rack plate 42 is fixedly connected to an inner side of the second protection plate 41, the gear 44 and the winding wheel 45 are fixedly connected to a surface of the rotating shaft 43, two ends of the rotating shaft 43 are mounted on an inner wall of the protection housing 2, a mounting hole is formed in the inner wall of the protection housing 2, two ends of the rotating shaft 43 can rotate in the mounting hole, the rack plate 42 is engaged with the gear 44, one end of the pull wire 46 is wound on the surface of the winding wheel 45, and the other end of the pull wire is connected to a surface of the elastic plate 35.
Further, 41 inner walls of the second protection plates are fixedly connected with balance plates 47, the rack plates 42 and the balance plates 47 are connected with the side wall of the protection shell 2 in a sliding mode, the rack plates 42 and the balance plates 47 are movably sleeved with third buffering members 48, and two ends of each third buffering member 48 are connected with the second protection plates 41 and the protection shell 2 respectively.
In the embodiment of the present invention, when an external moving object impacts the protective casing 2 from the direction of the first protection plate 32, on one hand, the moving elastic plate 35 drives the winding wheel 45 and the gear 44 to rotate through the pull wire 46, the rotating gear 44 drives the second protection plate 41 to move towards the direction close to the protective casing 2 through the rack plate 42, the second protection plate 41 compresses the third buffer 48 during the movement, so as to perform the functions of buffering and weakening the impact force, on the other hand, the moving elastic plate 35 also compresses the first buffer 331, so as to perform the functions of buffering and weakening the impact force, when the external moving object impacts the protective casing 2 from the direction of the second protection plate 41, the impact force drives the second protection plate 41 and the rack plate 42 to move towards the direction close to the natural gas meter 1, firstly, the second protection plate 41 compresses the third buffer 48 during the movement, so as to perform the functions of buffering and weakening the impact force, secondly, the moving rack plate 42 can drive the rotating winding wheel 45 to rotate through the gear 44, the rotating winding wheel 45 can wind the pull wire 46, so as to drive the elastic plate 35 to perform the bending deformation through the pull wire 46, and the elastic buffer 35 can also perform the maximum impact resistance to the impact deformation, and the first buffer the impact resistance of the sliding of the impact of the first buffer 331, and the impact resistance of the impact of the natural gas meter, thereby preventing the impact of the external moving object 35.
Referring to fig. 1 and 6, in an embodiment of the present invention, a sealing cover 21 is movably connected to a surface of the protective housing 2, and a transparent area 211 is disposed on a surface of the sealing cover 21 corresponding to the natural gas metering instrument 1.
In the embodiment of the present invention, the sealing cover 21 can be opened and closed, when the sealing cover 21 is opened, it is convenient to install and maintain the natural gas meter 1 inside, and when the sealing cover 21 is closed, a user can observe the specific working condition of the natural gas meter 1 through the transparent area 211.
The working principle of the invention is as follows: the installation step of the natural gas meter 1: firstly pass through bolt or screw fixed connection in protection casing 2 with natural gas meter 1, then with protection casing 2 fixed mounting on wall or building surface, then advance the natural gas and manage 11 and natural gas exit tube 12 and pass the fixed tube 31 and be connected with natural gas meter 1 by outer to interior, the natural gas advances the mode that pipe 11 and natural gas exit tube 12 are connected with natural gas meter 1 and does not do the restriction, can directly carry out threaded connection, also can use the nut cover to link together both, the natural gas advances the connected mode of pipe 11 and natural gas exit tube 12 and natural gas line and also is the same reason.
When an external moving object impacts the protective shell 2 from the direction of the first protective plate 32, the impact force drives the first protective plate 32, the fixed pipe 31 and the arc-shaped shell 33 to move towards the natural gas meter 1, due to the second buffer member 34, the moving distance of the arc-shaped shell 33 can be shortened, when the arc-shaped shell 33 moves towards the natural gas meter 1, the arc-shaped shell 33 can drive the elastic plate 35 to move towards the natural gas meter 1 together, meanwhile, the end part of the elastic plate 35 can also slide towards the inside of the arc-shaped shell 33, on one hand, the moving elastic plate 35 drives the winding wheel 45 and the gear 44 to rotate through the traction line 46, the rotating gear 44 drives the second protective plate 41 to move towards the direction close to the protective shell 2 through the rack plate 42, the second protective plate 41 can compress the third buffer member 48 in the moving process, so as to play a role in buffering and weakening the impact force, on the other hand, the moving elastic plate 35 can also compress the first buffer member 331, and also play a role in buffering and weakening the impact force and the impact force
When an external moving object impacts the protective housing 2 from the direction of the second protection plate 41, the impact force drives the second protection plate 41 and the rack plate 42 to move towards the direction close to the natural gas meter 1, firstly, the second protection plate 41 compresses the third buffer member 48 in the moving process, so that the effects of buffering and weakening the impact force are achieved, secondly, the moving rack plate 42 can drive the winding wheel 45 to rotate through the gear 44, the rotating winding wheel 45 can wind the traction wire 46, and further, the traction wire 46 drives the elastic plate 35 to bend and deform, and the elastic plate 35 with bending and deformation can slide towards the outer side of the arc-shaped housing 33, the sliding elastic plate 35 can pull the first buffer member 331, the elastic plate 35 with bending and deformation and the first buffer member 331 achieve the effects of buffering and weakening the impact force, so that the natural gas meter 1 inside is prevented from being damaged to the maximum extent, and the natural gas meter has the characteristics of good buffering effect and strong impact resistance.
Although several embodiments and examples of the present invention have been described for those skilled in the art, these embodiments and examples are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various ways, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides a natural gas metering device, includes natural gas meter (1), protection casing (2), first protection subassembly (3) and second protection subassembly (4), its characterized in that, natural gas meter (1) is installed in protection casing (2), the both ends of natural gas meter (1) are fixedly connected with natural gas respectively and advance pipe (11) and natural gas exit tube (12), the natural gas advances pipe (11) and natural gas exit tube (12) and is connected with natural gas line respectively, first protection subassembly (3) are including first protection plate (32) and arc casing (33), first protection plate (32) and arc casing (33) fixed connection, first protection plate (32) and arc casing (33) are located the outside and the inboard of protection casing (2) respectively, the natural gas advances pipe (11) and natural gas exit tube (12) and runs through first protection plate (32) and arc casing (33), second protection subassembly (4) set up between two adjacent first protection plates (32), and second protection subassembly (4) are connected with arc casing (33).
2. The natural gas metering device according to claim 1, wherein the first protection assembly (3) further comprises an elastic plate (35), two ends of the elastic plate (35) are respectively connected in the two adjacent arc-shaped shells (33) in a sliding manner, a first buffer member (331) is arranged in each arc-shaped shell (33), one end of each first buffer member (331) is connected with the elastic plate (35), and the second protection assembly (4) is connected with the surface of the elastic plate (35) in each arc-shaped shell (33).
3. The natural gas metering device of claim 2, wherein the first protection assembly (3) further comprises a fixed pipe (31) and a second buffer member (34), the fixed pipe (31) is fixedly connected between the first protection plate (32) and the arc-shaped shell (33), two ends of the fixed pipe (31) respectively penetrate through the first protection plate (32) and the arc-shaped shell (33), the natural gas inlet pipe (11) and the natural gas outlet pipe (12) penetrate through the fixed pipe (31), the other end of the first buffer member (331) is connected with the surface of the fixed pipe (31), the second buffer member (34) is movably sleeved on the surface of the fixed pipe (31), and the fixed pipe (31) is connected with the surface of the protection shell (2) in a sliding manner.
4. The natural gas metering device of claim 2, wherein the second protection assembly (4) comprises a second protection plate (41), a rack plate (42), a rotating shaft (43), a gear (44), a winding wheel (45) and a pull wire (46), the rack plate (42) is fixedly connected to the inner side of the second protection plate (41), the gear (44) and the winding wheel (45) are fixedly connected to the surface of the rotating shaft (43), two ends of the rotating shaft (43) are installed on the inner wall of the protection shell (2), the rack plate (42) is meshed with the gear (44), one end of the pull wire (46) is wound on the surface of the winding wheel (45), and the other end of the pull wire is connected to the surface of the elastic plate (35).
5. The natural gas metering device of claim 4, wherein a balance plate (47) is fixedly connected to the inner wall of the second protection plate (41), the rack plate (42) and the balance plate (47) are both connected with the side wall of the protection shell (2) in a sliding mode, a third buffer member (48) is movably sleeved on the surfaces of the rack plate (42) and the balance plate (47), and two ends of the third buffer member (48) are respectively connected with the second protection plate (41) and the protection shell (2).
6. A natural gas metering device according to claim 3, characterized in that the first (331), second (34) and third (48) buffers are springs or elastic rubber sleeves.
7. The natural gas metering device according to claim 1, characterized in that a sealing cover (21) is movably connected to the surface of the protective shell (2), and a transparent area (211) is arranged on the surface of the sealing cover (21) corresponding to the natural gas metering device (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310165387.5A CN115824341B (en) | 2023-02-27 | 2023-02-27 | Natural gas metering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310165387.5A CN115824341B (en) | 2023-02-27 | 2023-02-27 | Natural gas metering device |
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| CN115824341A true CN115824341A (en) | 2023-03-21 |
| CN115824341B CN115824341B (en) | 2023-06-20 |
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| CN202310165387.5A Active CN115824341B (en) | 2023-02-27 | 2023-02-27 | Natural gas metering device |
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| DE3428820A1 (en) * | 1984-08-04 | 1986-02-13 | Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn | VIBRATION INSULATOR |
| US20170369257A1 (en) * | 2016-06-28 | 2017-12-28 | Cnh Industrial Canada, Ltd. | Protective Wear Cover For Metering Unit |
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| CN212228125U (en) * | 2020-07-14 | 2020-12-25 | 郑宏伟 | Metering device for compressed natural gas |
| CN216778808U (en) * | 2021-12-27 | 2022-06-21 | 浙江中山化工集团股份有限公司 | Glass-lined open type stirring container with anti-collision structure |
| CN114696242A (en) * | 2022-05-31 | 2022-07-01 | 东营市南方电器有限责任公司 | Oil well distribution box with anti-collision function |
| CN114721023A (en) * | 2022-04-06 | 2022-07-08 | 杨兵山 | Vehicle-road cooperative application high-precision Beidou vehicle-mounted differential positioning device |
| CN115224419A (en) * | 2022-09-16 | 2022-10-21 | 徐州普瑞赛思物联网科技有限公司 | Lithium battery packaging protection device |
| CN218409577U (en) * | 2022-09-19 | 2023-01-31 | 云南省能源研究院有限公司 | Natural gas pipeline protection device based on natural gas power generation |
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2023
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3428820A1 (en) * | 1984-08-04 | 1986-02-13 | Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn | VIBRATION INSULATOR |
| US20170369257A1 (en) * | 2016-06-28 | 2017-12-28 | Cnh Industrial Canada, Ltd. | Protective Wear Cover For Metering Unit |
| CN210531508U (en) * | 2019-09-18 | 2020-05-15 | 水发物联科技有限公司 | Gas meter with buffer function |
| CN212228125U (en) * | 2020-07-14 | 2020-12-25 | 郑宏伟 | Metering device for compressed natural gas |
| CN216778808U (en) * | 2021-12-27 | 2022-06-21 | 浙江中山化工集团股份有限公司 | Glass-lined open type stirring container with anti-collision structure |
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| CN114696242A (en) * | 2022-05-31 | 2022-07-01 | 东营市南方电器有限责任公司 | Oil well distribution box with anti-collision function |
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| CN115824341B (en) | 2023-06-20 |
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Inventor after: Ma Wenhe Inventor after: Wang Zexin Inventor after: Xue Shengming Inventor after: Huang Xingang Inventor after: Zhang Haoxiang Inventor after: Bao Nan Inventor after: Xue Yangfan Inventor before: Ma Wenhe Inventor before: Wang Zexin Inventor before: Xue Shengming Inventor before: Huang Xingang Inventor before: Zhang Haoxiang Inventor before: Bao Nan Inventor before: Xue Yangfan |