CN115824341B - Natural gas metering device - Google Patents
Natural gas metering device Download PDFInfo
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- CN115824341B CN115824341B CN202310165387.5A CN202310165387A CN115824341B CN 115824341 B CN115824341 B CN 115824341B CN 202310165387 A CN202310165387 A CN 202310165387A CN 115824341 B CN115824341 B CN 115824341B
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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
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- 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, two ends of the natural gas metering instrument are respectively and fixedly connected with a natural gas inlet pipe and a natural gas outlet pipe, the natural gas inlet pipe and the natural gas outlet pipe are respectively connected with a natural gas pipeline, 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 respectively positioned 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, and the second protective component is arranged between two adjacent first protective plates and connected with one side of the arc-shaped shell, so that the internal natural gas metering instrument is prevented from being damaged to the greatest extent, and the device has the characteristics of good buffering effect and strong anti-collision 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, carbon black, chemicals and liquefied petroleum gas can be produced, propane and butane produced by natural gas are important raw materials in modern industry, natural gas mainly consists of gaseous low-molecular hydrocarbon and non-hydrocarbon gas, and the natural gas metering device is used for measuring and recording the gas flow in a pipeline.
The existing natural gas metering device is generally directly installed on the surface of a wall or a building object, when moving objects such as vehicles exist around, and when the moving objects collide with the natural gas metering device due to unexpected situations, the existing natural gas metering device has poor protection effect, and the metering device is easily damaged due to the collision force generated when the moving objects collide.
Disclosure of Invention
In order to achieve the above purpose, the invention provides a natural gas metering device, which comprises a natural gas metering device, a protective shell, a first protective component and a second protective component, wherein the natural gas metering device is arranged in the protective shell, two ends of the natural gas metering device are respectively and fixedly connected with a natural gas inlet pipe and a natural gas outlet pipe, the natural gas inlet pipe and the natural gas outlet pipe are respectively connected with a natural gas pipeline, 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 respectively positioned 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 component is arranged between two adjacent first protective plates, and the second protective component is connected with the arc-shaped shell.
As a further scheme of the invention, the first protection component further comprises an elastic plate, two ends of the elastic plate are respectively and slidably connected in two adjacent arc-shaped shells, a first buffer piece is arranged in each arc-shaped shell, one end of the first buffer piece is connected with the elastic plate, and the second protection component is connected with the surface of the elastic plate in each arc-shaped shell.
As a further scheme of the invention, the first protection component further comprises a fixed pipe and a second buffer piece, wherein the fixed pipe is fixedly connected between the first protection plate and the arc-shaped shell, two ends of the fixed pipe respectively penetrate through the first protection plate and the arc-shaped shell, the natural gas inlet pipe and the natural gas outlet pipe penetrate through the fixed pipe, the other end of the first buffer piece is connected with the surface of the fixed pipe, the second buffer piece is movably sleeved on the surface of the fixed pipe, the fixed pipe is in sliding connection with the surface of the protection shell, when an external moving object impacts the protection shell from the direction of the first protection plate, the fixed pipe and the arc-shaped shell are driven to move towards the direction of the natural gas meter by impact force, and due to the second buffer piece, the movement distance of the arc-shaped shell can be shortened, when the arc-shaped shell moves towards the direction of the natural gas meter, the arc-shaped shell together drives the elastic plate to move towards the direction of the natural gas meter, and at the same time, the end of the elastic plate also slides towards the inside of the arc-shaped shell, and the first protection component and the second protection component are mutually combined and connected.
As a further scheme of the invention, the second protection component comprises a second protection plate, a rack plate, a rotating shaft, a gear, a winding wheel and a traction wire, wherein 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 arranged on the inner wall of the protection shell, the rack plate is in meshed connection 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.
According to the invention, the balance plate is fixedly connected to the inner wall of the second protection plate, the rack plate and the balance plate are both in sliding connection with the side wall of the protection shell, the surfaces of the rack plate and the balance plate are movably sleeved with the third buffer piece, two ends of the third buffer piece 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, 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 compresses the third buffer piece in the moving process, so that the impact force is buffered and weakened, secondly the moving rack plate can drive the winding wheel to rotate through the gear, the rotating winding wheel can wind the traction wire, and then the elastic plate is driven to bend and deform through the traction wire, and the elastic plate which bends and deforms can slide towards the outer side of the arc-shaped shell.
As a further scheme of the invention, the first buffer piece, the second buffer piece and the third buffer piece are springs or elastic rubber sleeves.
As a further scheme of the invention, the surface of the protective shell is movably connected with a sealing cover, and a transparent area is arranged on the surface of the sealing cover at a position corresponding to the natural gas meter.
The beneficial effects of the invention are as follows: when external mobile object strikes the protective housing from the direction of first guard plate, the second protective component can play the effect of weakening first guard plate impact, and when external mobile object strikes the protective housing from the direction of second protective component, the first protective component can play the effect of weakening second protective component impact to furthest prevents that inside natural gas meter from receiving the damage, possesses the characteristics that the cushioning effect is good and anti striking ability is strong.
Drawings
Fig. 1 is a schematic structural diagram of a natural gas metering apparatus 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 according to an embodiment of the invention.
Fig. 4 is a perspective view of a second shield assembly according to an embodiment of the present invention.
Fig. 5 is an assembly schematic diagram of the natural gas meter, the first protection component and the second protection component according to the embodiment of the invention.
Fig. 6 is a perspective view of a natural gas metering apparatus according to an embodiment of the present invention.
Reference numerals: 1-natural gas meter, 11-natural gas inlet pipe, 12-natural gas outlet pipe, 2-protective housing, 21-sealing cover, 211-transparent area, 3-first protective component, 31-fixed pipe, 32-first protective plate, 33-arc housing, 331-first buffer, 34-second buffer, 35-elastic plate, 4-second protective component, 41-second protective plate, 42-rack plate, 43-spindle, 44-gear, 45-reel, 46-traction wire, 47-balance plate, 48-third buffer.
Description of the embodiments
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
Referring to fig. 1 to 6, the natural gas metering device provided by the embodiment of the invention includes a natural gas meter 1, a protective housing 2, a first protective component 3 and a second protective component 4, wherein the natural gas meter 1 is installed in the protective housing 2, two ends of the natural gas meter 1 are respectively and fixedly connected with a natural gas inlet pipe 11 and a natural gas outlet pipe 12, the natural gas inlet pipe 11 and the natural gas outlet pipe 12 are respectively connected with a natural gas pipeline, the first protective component 3 includes a first protective plate 32 and an arc housing 33, the first protective plate 32 is fixedly connected with the arc housing 33, the first protective plate 32 and the arc housing 33 are respectively positioned 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 housing 33, the second protective component 4 is arranged between two adjacent first protective plates 32, and the second protective component 4 is connected with the arc housing 33.
Further, the first protection component 3 further includes an elastic plate 35, two ends of the elastic plate 35 are slidably connected in two adjacent arc-shaped shells 33, a first buffer member 331 is disposed in the arc-shaped shells 33, one end of the first buffer member 331 is connected with the elastic plate 35, and the second protection component 4 is connected with the surface of the elastic plate 35 in the arc-shaped shells 33.
Further, the first protection component 3 further includes 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 slidably connected with the surface of the protection shell 2.
Further, the first buffer member 331, the second buffer member 34, and the third buffer member 48 are springs or elastic rubber sleeves.
In the embodiment of the invention, when an external moving object impacts the protective housing 2 from the direction of the first protective plate 32, the impact forces drive the first protective plate 32, the fixed pipe 31 and the arc-shaped housing 33 to move towards the direction of the natural gas meter 1, because the second buffer piece 34 can shorten the moving distance of the arc-shaped housing 33, when the arc-shaped housing 33 moves towards the direction of the natural gas meter 1, the arc-shaped housing 33 drives the elastic plate 35 to move together towards the direction of the natural gas meter 1, meanwhile, the end part of the elastic plate 35 also slides towards the inside of the arc-shaped housing 33, and the first protective component 3 and the second protective component 4 are combined and connected, when the external moving object impacts the protective housing 2 from the direction of the first protective plate 32, the second protective component 4 can play a role of weakening the impact force of the first protective plate 32, and when the external moving object impacts the protective housing 2 from the direction of the second protective component 4, the first protective component 3 can play a role of weakening the impact force of the second protective component 4, so that the internal natural gas meter 1 is prevented from being damaged to the maximum, and the device has the characteristics of good buffering effect and strong anti-impact capability.
Referring to fig. 1 to 5, in an embodiment of the 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 traction 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 mounted on the 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 in meshed connection with the gear 44, one end of the traction wire 46 is wound on the surface of the winding wheel 45, and the other end is connected to the surface of the elastic plate 35.
Further, the inner wall of the second protection plate 41 is fixedly connected with a balance plate 47, the rack plate 42 and the balance plate 47 are both in sliding connection with the side wall of the protection shell 2, 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.
In the embodiment of the invention, when an external moving object impacts the protective housing 2 from the direction of the first protective plate 32, on one hand, the moving elastic plate 35 drives the winding wheel 45 and the gear 44 to rotate through the traction wire 46, the rotating gear 44 drives the second protective plate 41 to move towards the direction close to the protective housing 2 through the gear plate 42, the second protective plate 41 compresses the third buffer member 48 in the moving process, thereby playing a role of buffering and weakening the impact force, on the other hand, the moving elastic plate 35 also compresses the first buffer member 331, and also plays a role of buffering and weakening the impact force, when the external moving object impacts the protective housing 2 from the direction of the second protective plate 41, the impact force drives the second protective plate 41 and the rack plate 42 to move towards the direction close to the natural gas meter 1, firstly, the second protective plate 41 can compress the third buffer member 48 in the moving process, thereby playing a role of buffering and weakening the impact force, and 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, thereby playing a role of buffering and weakening the elastic plate 35, and bending and deforming the elastic plate 35 towards the outer side of the protective housing 2, and the elastic plate 35 can well absorb the impact force of the first buffer member 33 and the impact force of the elastic plate 35, and the impact force of the elastic plate 35 can be well and the elastic plate 35 to the elastic buffer the impact force and the elastic buffer member 35 to the impact force of the first buffer member 33 and the impact force.
Referring to fig. 1 and 6, in an embodiment of the present invention, a sealing cover 21 is movably connected to the surface of the protective housing 2, and a transparent area 211 is disposed on the surface of the sealing cover 21 at a position corresponding to the natural gas meter 1.
In the embodiment of the invention, the sealing cover 21 can be opened and closed, when the sealing cover 21 is opened, the installation and maintenance of the internal natural gas meter 1 are convenient, 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, the natural gas meter 1 is fixedly connected in the protective shell 2 through bolts or screws, then the protective shell 2 is fixedly installed on a wall surface or a building surface, then the natural gas inlet pipe 11 and the natural gas outlet pipe 12 penetrate through the fixed pipe 31 from outside to inside to be connected with the natural gas meter 1, the mode of connecting the natural gas inlet pipe 11 and the natural gas outlet pipe 12 with the natural gas meter 1 is not limited, threaded connection can be directly carried out, a nut sleeve can be used for connecting the natural gas inlet pipe 11 and the natural gas outlet pipe 12 with a natural gas pipeline, and the same connection mode is also the same.
When an external moving object impacts the protective housing 2 from the direction of the first protective plate 32, the impact forces drive the first protective plate 32, the fixed tube 31 and the arc housing 33 to move towards the direction of the natural gas meter 1, the second buffer piece 34 can shorten the moving distance of the arc housing 33, when the arc housing 33 moves towards the direction of the natural gas meter 1, the arc housing 33 drives the elastic plate 35 to move together towards the direction of the natural gas meter 1, meanwhile, the end part of the elastic plate 35 also slides towards the inside of the arc housing 33, on one hand, the moving elastic plate 35 drives the winding wheel 45 and the gear 44 to rotate through the traction wire 46, the rotating gear 44 drives the second protective plate 41 to move towards the direction close to the protective housing 2 through the toothed plate 42, the second protective plate 41 compresses the third buffer piece 48 in the moving process, so as to play a role of buffering and weakening the impact force, and on the other hand, the moving elastic plate 35 also compresses the first buffer piece 331, and plays a role of buffering and weakening the impact force as well
When an external moving object collides with the protective shell 2 from the direction of the second protective plate 41, the second protective plate 41 and the rack plate 42 are driven to move towards the direction close to the natural gas meter 1 by the impact force, firstly, the second protective plate 41 can compress the third buffer piece 48 in the moving process, so that the effect of buffering and weakening the impact force is 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 elastic plate 35 is driven to bend and deform through the traction wire 46, the elastic plate 35 subjected to bending deformation can slide towards the outer side of the arc-shaped shell 33, the first buffer piece 331 is also pulled by the sliding elastic plate 35, the elastic plate 35 subjected to bending deformation and the first buffer piece 331 play a role in buffering and weakening the impact force, and the natural gas meter 1 in the inside is prevented from being damaged to the greatest extent, and the characteristics of good buffering effect and strong anti-impact capability are achieved.
It will be apparent to those skilled in the art that although several embodiments and examples of the present invention have been described, these embodiments and examples are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other modes, 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 their equivalents.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (3)
1. The utility model provides a natural gas metering device, includes natural gas meter (1), protective housing (2), first protective component (3) and second protective component (4), its characterized in that, natural gas meter (1) is installed in protective housing (2), natural gas meter (1) both ends are fixedly connected with natural gas advance pipe (11) and natural gas exit tube (12) respectively, natural gas advance pipe (11) and natural gas exit tube (12) are connected with the natural gas pipeline respectively, first protective component (3) include first guard plate (32) and arc casing (33), first guard plate (32) and arc casing (33) fixed connection, first guard plate (32) and arc casing (33) are located the outside and the inboard of protective housing (2) respectively, natural gas advance pipe (11) and natural gas exit tube (12) run through first guard plate (32) and arc casing (33), second protective component (4) set up between two adjacent first guard plates (32), and second protective component (4) are connected with arc casing (33);
the first protection component (3) further comprises an elastic plate (35), two ends of the elastic plate (35) are respectively and slidably connected in two adjacent arc-shaped shells (33), a first buffer piece (331) is arranged in each arc-shaped shell (33), one end of each first buffer piece (331) is connected with the elastic plate (35), and the second protection component (4) is connected with the surface of the elastic plate (35) in each arc-shaped shell (33);
the first protection component (3) further comprises a fixed pipe (31) and a second buffer piece (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 piece (331) is connected with the surface of the fixed pipe (31), the second buffer piece (34) is movably sleeved on the surface of the fixed pipe (31), and the fixed pipe (31) is in sliding connection with the surface of the protection shell (2);
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 traction wire (46), wherein 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 mounted on the inner wall of the protection shell (2), the rack plate (42) is in meshed connection with the gear (44), one end of the traction wire (46) is wound on the surface of the winding wheel (45), and the other end of the traction wire is connected with the surface of the elastic plate (35);
the inner wall of the second protection plate (41) is fixedly connected with a balance plate (47), the rack plate (42) and the balance plate (47) are both in sliding connection with the side wall of the protection shell (2), a third buffer piece (48) is movably sleeved on the surfaces of the rack plate (42) and the balance plate (47), and two ends of the third buffer piece (48) are respectively connected with the second protection plate (41) and the protection shell (2);
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 direction of the natural gas meter (1), the moving distance of the arc-shaped shell (33) can be shortened due to the second buffer piece (34), and when the arc-shaped shell (33) moves towards the direction of the natural gas meter (1), the arc-shaped shell (33) can drive the elastic plate (35) to move towards the direction of the natural gas meter (1) together, and the end part of the elastic plate (35) slides towards the inside of the arc-shaped shell (33);
when external mobile object strikes protective housing (2) from the direction of second guard plate (41), impact forces drive second guard plate (41) and rack board (42) to be close to the direction removal of natural gas meter (1), first second guard plate (41) compress third bolster (48) at the in-process of removal, thereby play buffering and weaken the effect of impact, second rack board (42) that removes can drive reel (45) rotatory through gear (44), rotatory reel (45) can wind haulage line (46), and then drive elastic plate (35) bending deformation through haulage line (46), and the outside slip of arc casing (33) can be faced to elastic plate (35) of bending deformation, first bolster (331) are pulled to elastic plate (35) and first bolster (331) of bending deformation have played buffering and weaken the effect of impact, thereby furthest prevent that inside natural gas meter (1) from receiving the damage, possess the characteristics that buffering effect is good and anti-impact is strong.
2. A natural gas metering device as claimed in claim 1, characterized in that the first (331), second (34) and third (48) buffers are springs or elastic rubber sleeves.
3. A natural gas metering device according to claim 2, characterized in that the surface of the protective housing (2) is movably connected with a sealing cover (21), and a transparent area (211) is arranged on the surface of the sealing cover (21) at a position corresponding to the natural gas meter (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 CN115824341A (en) | 2023-03-21 |
| CN115824341B true 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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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3428820C2 (en) * | 1984-08-04 | 1986-11-06 | Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn | Vibration isolator |
| US9944473B2 (en) * | 2016-06-28 | 2018-04-17 | 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 |
| CN114721023A (en) * | 2022-04-06 | 2022-07-08 | 杨兵山 | Vehicle-road cooperative application high-precision Beidou vehicle-mounted differential positioning device |
| CN114696242B (en) * | 2022-05-31 | 2022-08-16 | 东营市南方电器有限责任公司 | Oil well distribution box with anti-collision function |
| CN115224419B (en) * | 2022-09-16 | 2022-12-20 | 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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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 |
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