CN115326526B - Oil mixing device for petroleum analyzer - Google Patents
Oil mixing device for petroleum analyzer Download PDFInfo
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- CN115326526B CN115326526B CN202210893409.5A CN202210893409A CN115326526B CN 115326526 B CN115326526 B CN 115326526B CN 202210893409 A CN202210893409 A CN 202210893409A CN 115326526 B CN115326526 B CN 115326526B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
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Abstract
The invention discloses an oil product mixing device for an oil analysis instrument, which comprises an oil mixing mechanism, wherein the oil mixing mechanism comprises a base, the top of the base is fixedly connected with a first support, the top of the first support is rotationally connected with a first bearing, the inner wall of the first bearing is fixedly connected with a mixing cylinder, the outer wall of the mixing cylinder is fixedly connected with two second bearings, the two second bearings are rotationally connected with the base, the top of the base is far away from the right end of the first support and fixedly connected with a second support.
Description
Technical Field
The invention relates to the technical field of petroleum mixing, in particular to an oil product mixing device for a petroleum analysis instrument.
Background
Petroleum is a viscous, dark brown liquid called industrial blood, the upper part of the crust has petroleum storage, the main components are a mixture of various alkanes, cycloalkanes and aromatic hydrocarbons, the oil-forming mechanism of petroleum has two theories of biological sediment change oil and petrochemical oil, the former is widely accepted, the petroleum is considered to be formed by long evolution of organisms in ancient oceans or lakes, the latter is considered to be formed by the carbon in the crust itself, the latter is irrelevant to organisms and renewable, the petroleum is mainly used as fuel oil and gasoline, and the petroleum is also used as raw materials of many chemical industrial products such as solution, fertilizer, pesticide and plastics;
referring to the prior national patent, the name is an oil product mixing device for a petroleum analyzer, the application number is CN201910234378.0, and the oil product mixing device for the petroleum analyzer comprises a mixing tank, a fixed box and a connecting box; the first motor is connected with the transmission piece; the transmission piece is connected with the first rotating piece in a transmission way; the top end of the first rotating piece extends upwards and penetrates through the fixed box to be connected with the rotating disc; the first supporting piece is vertically arranged on the fixed box; the sliding plate is horizontally arranged above the mixing tank and is connected with the two first supporting pieces in a sliding way; the second motor is arranged on the sliding plate and is connected with the second rotating piece; the bottom end of the second rotating piece extends into the mixing tank; the stirring piece is arranged on the second rotating piece; the bottom of the sliding piece is provided with a connecting rod which is connected with the hemispherical body; the third motor is arranged in the connecting box, and an output shaft of the third motor is connected with the third rotating piece; the rotating rod is rotationally connected with the sliding piece and the third rotating piece; the rolling piece is arranged on the sliding plate and is in rolling connection with the hemispheroids; the elastic piece is connected with the connecting box and the sliding plate. The invention can quickly mix oil products uniformly, has high mixing efficiency and good mixing effect;
the above patent mixes the oil through rotating the stirring, but in the stirring process, the friction of agitating unit and oil can produce heat, makes the oil temperature rise, and the oil can lead to dangerous emergence after the temperature rise, and the crude oil that comes up carries the oil residue in addition, and oil residue and oil are difficult to mix.
Disclosure of Invention
The invention aims to provide an oil product mixing device for a petroleum analyzer, which aims to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an oil mixing device for petroleum analyzer, includes petroleum mixing mechanism, petroleum mixing mechanism includes the base, the top fixedly connected with first support of base, the top of first support rotates and is connected with first bearing, the inner wall fixedly connected with mixing drum of first bearing, the outer wall fixedly connected with two second bearings of mixing drum, two second bearings all rotate with the base to be connected, the right-hand member fixedly connected with second support that first support was kept away from at the base top, the outer wall fixedly connected with rotation mixing mechanism of mixing drum, the top fixedly connected with air current of second support blows out the mechanism;
the rotary mixing mechanism comprises a first gear, the outer wall of the mixing drum is positioned between two second bearings and fixedly connected with the inner wall of the first gear, the second gear is meshed with the first gear, the outer wall of the base is fixedly connected with a motor, the motor is fixedly connected with the axle center of the second gear through a rotating shaft, and the outer wall of the mixing drum is hinged with a door plate.
According to the technical scheme, the air flow blowing mechanism comprises a fan, and the bottom of the fan is fixedly connected with the top of the second bracket.
According to the technical scheme, the outer wall of the fan is inserted with the long pipe, the right side of the mixing drum is rotationally connected with the third bearing, and the long pipe is inserted into the inner wall of the third bearing.
According to the technical scheme, the outer wall of the long tube is provided with the hole, the position, adjacent to the hole, of the inner wall of the long tube is fixedly connected with the elastic rod, and the long tube is fixedly connected with the straight rod through the elastic rod.
According to the technical scheme, the stirring wire is fixedly connected to the top of the straight rod, and the impact block is fixedly connected to the bottom of the straight rod.
According to the technical scheme, the inner wall of the mixing cylinder is fixedly connected with the arc-shaped rod, the arc-shaped rod is made of elastic materials, the first protruding thorn is fixedly connected to the bottom of the arc-shaped rod, and the second protruding thorn is fixedly connected to the position, adjacent to the first protruding thorn, of the inner wall of the mixing cylinder.
According to the technical scheme, the long tube outer wall is located the inside position fixedly connected with horizontal pole of mixing drum, the end fixedly connected with of horizontal pole hides the dog.
According to the technical scheme, the outer wall fixedly connected with swash plate of horizontal pole, the outer wall fixedly connected with protruding pole of swash plate, the terminal fixedly connected with sloping block of swash plate.
Compared with the prior art, the invention has the following beneficial effects: the fan blows the gas into the mixing cylinder through the long pipe, the gas is blown out to enable the gas flow in the mixing cylinder to flow in an accelerating way, the temperature of the gas flow is reduced in an accelerating way, the gas is blown into the mixing cylinder, the original gas in the mixing cylinder is discharged from the left side of the mixing cylinder, the gas in the mixing cylinder is continuously rotated, and the heat dissipation of the mixing cylinder is ensured;
the mixing drum is used for continuously overturning the petroleum in the overturning process, so that the sinking of oil residues is avoided, the comprehensive mixing of the petroleum is ensured, the petroleum is continuously impacted with the inclined plate in the overturning process, the inclined plate is used for stirring the petroleum, the petroleum is more fully mixed after being stirred, the inclined plate is used for obliquely arranging the petroleum, the petroleum is moved on the inclined plate, the petroleum at the bottom position is lifted to the top position, the positions of the petroleum are exchanged, and the mixing of the petroleum is ensured;
the rotation of mixing drum makes the arc pole follow the rotation then, and the arc pole follows rotatory in-process, and the first spike on the arc pole and the second spike of mixing drum inner wall cut the dregs of fat, have ensured smashing the dregs of fat, have ensured the mixing of oil and dregs of fat.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the overall principle of the present invention;
FIG. 2 is a schematic elevational view of the present invention from the front cross-section of FIG. 1;
FIG. 3 is an enlarged schematic view of the portion A of FIG. 2 in accordance with the present invention;
FIG. 4 is a schematic view of the left side perspective of the present invention;
FIG. 5 is a schematic view of the swash plate of FIG. 4 in cross-section in its position;
fig. 6 is an enlarged schematic view of the structure of the portion B in fig. 5 according to the present invention.
In the figure: 1. a petroleum mixing mechanism; 11. a base; 12. a first bracket; 13. a second bracket; 14. a first bearing; 15. a second bearing; 16. a mixing drum; 2. rotating the mixing mechanism; 21. a first gear; 22. a door panel; 23. a second gear; 24. a motor; 3. an air flow blowing mechanism; 31. a blower; 32. a cross bar; 33. a shielding block; 34. a long tube; 35. a third bearing; 36. a hole; 37. stirring the wires; 38. a straight rod; 39. an impact block; 310. an elastic rod; 311. an arc-shaped rod; 312. a first spur; 313. a second spur; 314. a sloping plate; 315. a protruding rod; 316. and (5) an oblique block.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, the present invention provides the following technical solutions: the utility model provides an oil mixing device for petroleum analyzer, including petroleum mixing mechanism 1, petroleum mixing mechanism 1 includes base 11, the top fixedly connected with first support 12 of base 11, the top of first support 12 rotates and is connected with first bearing 14, the inner wall fixedly connected with mixing drum 16 of first bearing 14, send the petroleum crude oil that needs to mix into mixing drum 16, then close door plant 22, motor 24 passes through the power cord and connects 220v power, then make motor 24 switch on, motor 24 drives the rotation of second gear 23 through the pivot, the intermeshing of second gear 23 and first gear 21, then make second gear 23 drive mixing drum 16 rotatory, mixing drum 16 is placed on base 11 through the second bearing 15, make mixing drum 16 can rotate, the outer wall fixedly connected with two second bearings 15 of mixing drum 16, two second bearings 15 all rotate with base 11 to be connected with, the right end fixedly connected with second support 13 of first support 12 of base 11 top, the outer wall fixedly connected with rotation mixing mechanism 2 of mixing drum 16, the left end of mixing drum 16 is connected with first support 12 through first bearing 14 and first support 16, the rotation of mixing drum 16 is in the course of rotating drum 16, the mixing drum 3 is in the course of mixing drum rotation of mixing drum 16 has been avoided, the mixing drum rotation of mixing drum 13 has been carried out in the course of rotation, the mixing drum rotation has been carried out in the course has been mixed together;
the rotary mixing mechanism 2 comprises a first gear 21, the outer wall of the mixing drum 16 is positioned between two second bearings 15 and is fixedly connected with the inner wall of the first gear 21, the first gear 21 is meshed with a second gear 23, the outer wall of the base 11 is fixedly connected with a motor 24, the motor 24 is fixedly connected with the axle center of the second gear 23 through a rotating shaft, and the outer wall of the mixing drum 16 is hinged with a door plate 22;
when in use, the utility model is characterized in that: the petroleum crude oil to be mixed is sent into the mixing drum 16, then the door plate 22 is closed, the motor 24 is connected with a 220v power supply through a power line, then the motor 24 is electrified, the motor 24 drives the second gear 23 to rotate through a rotating shaft, the second gear 23 is meshed with the first gear 21, then the second gear 23 drives the mixing drum 16 to rotate, the mixing drum 16 is placed on the base 11 through the second bearing 15, the mixing drum 16 can rotate, the left end of the mixing drum 16 is connected with the first support 12 through the first bearing 14, petroleum inside the mixing drum 16 rotates along with the mixing drum 16 in the rotating process, the petroleum is stirred in the rotating process, the petroleum is enabled to continuously move in the rotating process, the sinking of oil residues is avoided, and the petroleum and the oil residues are mixed together.
Example two
On the basis of embodiment one, please continue to refer to 2-6, the following features are added:
the air flow blowing mechanism 3 comprises a fan 31, and the bottom of the fan 31 is fixedly connected with the top of the second bracket 13;
the outer wall of the fan 31 is inserted with a long tube 34, the fan 31 is communicated with a 220v power supply through a power line, then the fan 31 is electrified, external air is extracted through the long tube 34 after the fan 31 is electrified, then the air is discharged into the mixing drum 16 through a hole 36 on the long tube 34, the air enters the mixing drum 16 to accelerate the air flow, the outside cold air is added, then the air in the mixing drum 16 is extruded and discharged, the air in the mixing drum 16 is discharged from the left side of the mixing drum 16, the air in the mixing drum 16 is continuously alternated, the petroleum is kept to be cooled, the air blown out from the hole 36 rises from the bottom of the petroleum, the petroleum is cooled comprehensively, a third bearing 35 is rotationally connected to the right side of the mixing drum 16, and the long tube 34 is inserted into the inner wall of the third bearing 35;
the outer wall of the long tube 34 is provided with a hole 36, an elastic rod 310 is fixedly connected to the inner wall of the long tube 34 at a position adjacent to the hole 36, and the long tube 34 is fixedly connected with a straight rod 38 through the elastic rod 310;
the top of the straight rod 38 is fixedly connected with a stirring wire 37, and the bottom of the straight rod 38 is fixedly connected with an impact block 39;
the inner wall of the mixing cylinder 16 is fixedly connected with an arc-shaped rod 311, the bottom of the arc-shaped rod 311 is fixedly connected with a first protruding thorn 312, and the position, adjacent to the first protruding thorn 312, of the inner wall of the mixing cylinder 16 is fixedly connected with a second protruding thorn 313;
the outer wall of the long tube 34 is fixedly connected with a cross rod 32 at a position inside the mixing cylinder 16, and the tail end of the cross rod 32 is fixedly connected with a shielding block 33;
the outer wall of the cross rod 32 is fixedly connected with an inclined plate 314, the rotation direction of the mixing drum 16 is in a rotation mode that the top is forward, the bottom is backward, the inclined plate 314 is obliquely arranged and then takes up petroleum, a convex rod 315 on the inclined plate 314 and an inclined block 316 stir the petroleum to further mix the petroleum, the outer wall of the inclined plate 314 is fixedly connected with the convex rod 315, and the tail end of the inclined plate 314 is fixedly connected with the inclined block 316;
when in use, the utility model is characterized in that: the fan 31 is communicated with 220v power supply through a power line, then the fan 31 is electrified, the fan 31 extracts external air through the long tube 34 after being electrified, then the external air is discharged into the mixing drum 16 through the hole 36 on the long tube 34, the air enters to accelerate the air flow in the mixing drum 16, the external cold air is added, then the air in the mixing drum 16 is extruded and discharged, the air in the mixing drum 16 is discharged from the left side of the mixing drum 16, the air in the mixing drum 16 is continuously alternated, the petroleum is kept to be cooled, the air blown out from the hole 36 rises from the bottom of the petroleum, the petroleum is comprehensively cooled, and when the air rises from the bottom of the petroleum, the air bubbles are generated in the petroleum, the air bubbles can extrude the petroleum, and then the mixing of the petroleum is accelerated, in the process of stirring the internal petroleum by the mixing cylinder 16, the long tube 34 is respectively rotated through the third bearing 35, so that the long tube 34 is in a static state, the rotation of the mixing cylinder 16 and the static state of the long tube 34 ensure that the petroleum is mixed with the long tube 34 by mutual extrusion when the petroleum passes through the long tube 34, the petroleum passes through the stirring wire 37 and the impact block 39 when the petroleum passes through the long tube 34, the petroleum is further stirred, the arc-shaped rod 311 follows the rotation of the mixing cylinder 16, the first spurs 312 and the second spurs 313 cut oil residues in the petroleum, the oil residues are crushed, the impact block 39 extrudes the arc-shaped rod 311 when the arc-shaped rod 311 rotates to the position of the long tube 34, the first spurs 312 and the arc-shaped rod 311 are close to be staggered, and then the oil residues positioned at the position of the arc-shaped rod 311 are extruded, so that the oil residues are further crushed;
the rotation direction of the mixing drum 16 is the rotation mode that the top is forward, the bottom is backward, the inclined plate 314 is obliquely arranged, then oil is started, the oil is stirred by the protruding rod 315 on the inclined plate 314 and the inclined block 316, the oil is further mixed, and after the mixing is finished, the door plate 22 is opened to take out the mixed oil.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides an oil mixing device for petroleum analyzer, includes petroleum mixing mechanism (1), its characterized in that: the petroleum mixing mechanism (1) comprises a base (11), a first support (12) is fixedly connected to the top of the base (11), a first bearing (14) is rotatably connected to the top of the first support (12), a mixing drum (16) is fixedly connected to the inner wall of the first bearing (14), two second bearings (15) are fixedly connected to the outer wall of the mixing drum (16), the two second bearings (15) are rotatably connected with the base (11), a second support (13) is fixedly connected to the right end, far away from the first support (12), of the top of the base (11), a rotary mixing mechanism (2) is fixedly connected to the outer wall of the mixing drum (16), and an airflow blowing mechanism (3) is fixedly connected to the top of the second support (13);
the rotary mixing mechanism (2) comprises a first gear (21), the outer wall of a mixing drum (16) is fixedly connected with the inner wall of the first gear (21) at a position between two second bearings (15), the first gear (21) is connected with a second gear (23) in a meshed manner, the outer wall of a base (11) is fixedly connected with a motor (24), the motor (24) is fixedly connected with the shaft center of the second gear (23) through a rotating shaft, the outer wall of the mixing drum (16) is hinged with a door plate (22), the air flow blowing mechanism (3) comprises a fan (31), the bottom of the fan (31) is fixedly connected with the top of a second bracket (13), the outer wall of the fan (31) is connected with a long tube (34) in a spliced manner, the right side of the mixing drum (16) is rotatably connected with a third bearing (35), the long tube (34) is spliced with the inner wall of the third bearing (35), the outer wall of the long tube (34) is provided with a hole (36), the inner wall of the long tube (34) is fixedly connected with an elastic rod (310) adjacent to the shaft center of the hole (36), the inner wall of the long tube (34) is fixedly connected with a straight rod (38) through a straight rod (38), the bottom of the straight rod (38) is fixedly connected with an impact block (39).
2. The oil blending device for a petroleum analysis instrument according to claim 1, wherein: the mixing drum is characterized in that an arc-shaped rod (311) is fixedly connected to the inner wall of the mixing drum (16), a first protruding thorn (312) is fixedly connected to the bottom of the arc-shaped rod (311), and a second protruding thorn (313) is fixedly connected to the inner wall of the mixing drum (16) adjacent to the first protruding thorn (312).
3. The oil blending device for a petroleum analysis instrument according to claim 1, wherein: the outer wall of the long tube (34) is fixedly connected with a cross rod (32) at the position inside the mixing drum (16), and the tail end of the cross rod (32) is fixedly connected with a shielding block (33).
4. The oil blending device for a petroleum analysis instrument according to claim 3, wherein: the outer wall fixedly connected with swash plate (314) of horizontal pole (32), the outer wall fixedly connected with protruding pole (315) of swash plate (314), the end fixedly connected with sloping block (316) of swash plate (314).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210893409.5A CN115326526B (en) | 2022-07-27 | 2022-07-27 | Oil mixing device for petroleum analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210893409.5A CN115326526B (en) | 2022-07-27 | 2022-07-27 | Oil mixing device for petroleum analyzer |
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| Publication Number | Publication Date |
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| CN115326526A CN115326526A (en) | 2022-11-11 |
| CN115326526B true CN115326526B (en) | 2023-08-08 |
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| CN202210893409.5A Active CN115326526B (en) | 2022-07-27 | 2022-07-27 | Oil mixing device for petroleum analyzer |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3941357A (en) * | 1974-10-07 | 1976-03-02 | Willow Technology, Inc. | Method and apparatus for mixing viscous materials |
| CN207307741U (en) * | 2017-08-23 | 2018-05-04 | 兰州天大华瑞环境工程技术有限公司 | A kind of nonpetroleum Jiao mixing apparatus |
| CN209501439U (en) * | 2018-11-22 | 2019-10-18 | 陕西铭锐石油科技有限公司 | A kind of petroleum assistant material processing device |
| CN212666394U (en) * | 2020-04-02 | 2021-03-09 | 林雪松 | Concrete mixing device for hydraulic engineering |
-
2022
- 2022-07-27 CN CN202210893409.5A patent/CN115326526B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3941357A (en) * | 1974-10-07 | 1976-03-02 | Willow Technology, Inc. | Method and apparatus for mixing viscous materials |
| CN207307741U (en) * | 2017-08-23 | 2018-05-04 | 兰州天大华瑞环境工程技术有限公司 | A kind of nonpetroleum Jiao mixing apparatus |
| CN209501439U (en) * | 2018-11-22 | 2019-10-18 | 陕西铭锐石油科技有限公司 | A kind of petroleum assistant material processing device |
| CN212666394U (en) * | 2020-04-02 | 2021-03-09 | 林雪松 | Concrete mixing device for hydraulic engineering |
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| CN115326526A (en) | 2022-11-11 |
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