CN220227081U - Synthetic floating type offshore wind turbine foundation - Google Patents
Synthetic floating type offshore wind turbine foundation Download PDFInfo
- Publication number
- CN220227081U CN220227081U CN202322292343.7U CN202322292343U CN220227081U CN 220227081 U CN220227081 U CN 220227081U CN 202322292343 U CN202322292343 U CN 202322292343U CN 220227081 U CN220227081 U CN 220227081U
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- pontoon
- wind turbine
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- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 10
- 239000013535 sea water Substances 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005188 flotation Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000003351 stiffener Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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Abstract
The utility model discloses a composite floating type offshore wind turbine foundation, which belongs to the technical field of floating equipment and comprises a floating frame, a central pontoon and a connecting rod, wherein the floating frame is provided with a clamping position which is used for installing a supporting pontoon on a wind driven generator, and the clamping position is of a structure matched with the supporting pontoon; the central pontoon is detachably connected with the floating frame through the connecting rod, the connecting rod is provided with a plurality of connecting rods along the circumference of the central pontoon, and the central pontoon is arranged at the central position of the floating frame. The synthetic floating type offshore wind turbine foundation provided by the utility model utilizes the symmetrical stability of polygons to arrange wind driven generators on each vertex of a floating frame. The structure can provide stable support for each wind driven generator, and particularly, the wind driven generator can form a huge space framework through the synthesis, and can resist the impact of huge sea waves, ocean currents and gushes in sea water; conditions are provided for the independent shutdown or port returning maintenance of each fan, so that the cost is greatly saved and the benefit is improved.
Description
Technical Field
The utility model relates to the technical field of floating equipment, in particular to a synthetic floating type offshore wind turbine foundation.
Background
The wind power industry is driven by the double carbon target in China. However, the weakness of the high-efficiency three-blade offshore wind power is gradually revealed, the maintenance and overhaul of the power generation device in the high altitude are far away from the land, crisis rescue is extremely difficult, and particularly, the cost of a conventional floating foundation is high, and the blades mainly use nondegradable glass fibers, so that the solid waste treatment after retirement is extremely difficult.
At present, the floating foundation is single in structure and insufficient in stability, the wind driven generator is inconvenient to detach after being fixed with the floating foundation, and the wind driven generator is difficult to maintain and repair and replace. Therefore, a device is urgently needed to be designed, and the problems of single structure, insufficient stability, inconvenient disassembly, maintenance and repair and difficult replacement in the prior art are solved.
Disclosure of Invention
Aiming at the defects, the utility model provides a synthetic floating type offshore wind turbine foundation to solve the problems of single structure, insufficient stability, inconvenient disassembly, difficult maintenance and repair and difficult replacement in the prior art.
The utility model provides a synthetic floating offshore wind turbine foundation, comprising:
the floating frame is provided with a clamping position which is used for installing a supporting pontoon on the wind driven generator, and the clamping position is of a structure matched with the supporting pontoon;
the center pontoon is detachably connected with the floating frame through a connecting rod, a plurality of connecting rods are arranged along the circumference of the center pontoon, and the center pontoon is arranged at the center position of the floating frame.
Preferably, the floating frame includes:
the connecting piece is detachably connected with the connecting rod and the supporting buoy, the clamping positions are arranged on the connecting piece, and the connecting piece is provided with a plurality of connecting pieces;
the first floating rods are detachably connected with the connecting pieces, are provided with a plurality of first floating rods and are respectively arranged between two adjacent connecting pieces;
the second floating rod is detachably connected with the connecting piece, the second floating rods are provided with a plurality of connecting pieces and are respectively arranged between two adjacent connecting pieces, and the arrangement direction of the second floating rods is parallel to the arrangement direction of the first floating rods and is arranged on one side, far away from the wind driven generator, of the first floating rods.
Preferably, the second floating rod is arranged at intervals from the first floating rod in the vertical direction, and the first floating rod is provided with two floating rods side by side along the horizontal direction; the diameter of the second floating rod is larger than that of the first floating rod.
Preferably, a first supporting frame is arranged between the second floating rod and the corresponding two first floating rods, a second supporting frame is arranged between the two first floating rods, and the two first supporting frames and the second supporting frames form a triangular frame structure together; the triangular frame structure is provided with a plurality of triangular frame structures side by side along the arrangement direction of the first floating rod.
Preferably, the floating frame is of a regular polygon structure; the central pontoon is of a regular polygon tubular structure with the same shape and different proportions with the floating frame.
Preferably, the supporting pontoon is in a triangular prism structure and is used for installing the wind driven generator, and the clamping position is a groove which is matched with the supporting pontoon and has a triangular cross section and is used for being clamped with the supporting pontoon.
Preferably, the floating frame is in a regular triangle structure or a square structure or a regular hexagon structure; or/and the first floating rod and the second floating rod are sealed steel pipes.
Preferably, one end of the central pontoon, which is close to the wind power generator, is higher than one end of the connecting piece, which is close to the wind power generator; one end of the connecting piece, which is close to the wind driven generator, is higher than the first floating rod; the external contour of the cross section of the connecting piece in the horizontal direction is a regular triangle.
Preferably, the floating frame further comprises a mooring component connected with the floating frame, the mooring component comprises a connecting rope connected with the floating frame, one end, far away from the floating frame, of the connecting rope is provided with a fixing anchor, and the fixing anchor is used for fixing the floating frame.
Preferably, the connecting rod comprises a plurality of rod units arranged along the arrangement direction of the central pontoon, a reinforcing rod is connected between every two adjacent rod units, and the reinforcing rod is arranged at a certain angle with the corresponding rod unit.
According to the scheme, the synthetic floating type offshore wind turbine foundation provided by the utility model utilizes the symmetrical stability of the polygon, and the wind driven generator is arranged on each vertex of the floating frame. The structure can provide stable support for each wind driven generator, and particularly, the wind driven generator can form a huge space framework through the synthesis, and can resist the impact of huge sea waves, ocean currents and gushes in sea water; conditions are provided for maintenance of each fan when the fan is stopped independently (even pulled back to a port), so that the cost is greatly saved, and the benefit is improved. Because the structure can be provided with a plurality of special wind driven generators, the shutdown of each wind driven generator can not affect the normal power generation of other wind driven generators, the utilization rate of the system is improved, the investment income is increased, and meanwhile, the generators of the wind driven generators are arranged at the bottom, so that the maintenance and the overhaul are particularly simple and convenient. The device can also provide structural support for open sea pasture or offshore net cage culture, thereby achieving two purposes and greatly improving the use value of the structure. The utility model solves the problems of single structure, insufficient stability, inconvenient disassembly, difficult maintenance and repair and replacement existing in the prior art, has simple structure and obvious action effect, and is suitable for wide popularization.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a synthetic floating offshore wind turbine foundation according to the present utility model;
FIG. 2 is a schematic top view of a synthetic floating offshore wind turbine foundation according to the present utility model;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of another synthetic floating offshore wind turbine foundation according to the present utility model;
fig. 5 is a schematic structural view of a fan installed on a synthetic floating offshore wind turbine foundation according to the present utility model.
In fig. 1-5:
1. a floating frame; 2. a central pontoon; 3. a connecting rod; 4. a wind power generator; 5. supporting the pontoon; 11. a connecting piece; 12. a first float rod; 13. a second float rod; 14. a first support frame; 15. a second support frame; 31. a lever unit; 32. a reinforcing rod; 111. a clamping position; 112. and (5) a mounting table.
Detailed Description
The following description of the embodiments of the present utility model 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 utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 5, a specific embodiment of a synthetic floating offshore wind turbine foundation according to the present utility model will now be described. The composite floating type offshore wind turbine foundation comprises a floating frame 1, a central pontoon 2 and a connecting rod 3, wherein the floating frame 1 is provided with a clamping position 111, the clamping position 111 is used for installing a supporting pontoon 5, the supporting pontoon 5 is arranged below a wind driven generator 4, and the clamping position 111 is of a structure matched with the supporting pontoon 5; the center pontoon 2 is detachably connected with the floating frame 1 through the connecting rod 3, the connecting rod 3 is provided with a plurality of center pontoons 2 along the circumference of the center pontoon 2, and the center pontoon 2 is arranged at the center position of the floating frame 1. This construction provides for the wind power generator 4 to be able to be separated from the floating frame 1 alone, and to be hauled back to the maintenance port as a whole.
For convenience of explanation, referring to fig. 1, a rectangular coordinate system is established by taking any point in space as an origin, taking the setting direction of the central pontoon 2 as a Z axis, taking the setting direction of one of the connecting rods 3 as an X axis, and taking the direction of a straight line perpendicular to the X axis and the Z axis as a Y axis, wherein the XY plane is a horizontal plane, the direction indicated on the horizontal plane is a horizontal direction, and the direction indicated on the Z axis is a vertical direction.
In the present embodiment, the floating frame 1 has a regular polygon structure; the central pontoon 2 has a regular polygon tubular structure with the same shape and different proportion as the floating frame 1. The connecting rod 3 includes a plurality of pole monomers 31 that set up along the setting direction of center flotation pontoon 2, is connected with stiffener 32 between the adjacent pole monomer 31, and stiffener 32 is certain angle setting with corresponding pole monomer 31, forms triangle-shaped between pole monomer 31, stiffener 32 and center flotation pontoon 2 or the showy frame 1, and overall structure's stability is better, and the stability of being connected between center flotation pontoon 2 and the showy frame 1 also can effectively ensure. The supporting pontoon 5 is in a triangular prism structure and is used for installing the wind driven generator 4 and ensuring that the wind driven generator 4 is suspended on the water surface, and the clamping position 111 is a groove which is matched with the supporting pontoon 5 and has a triangular cross section and is used for being clamped with the supporting pontoon 5.
In this embodiment, in order to ensure the use effect of the wind power generator 4, the wind power generator 4 used herein is a wind gathering type generator without blades, in which the generator is arranged at the bottom, and the arrangement of the synthetic floating type offshore wind turbine foundation is to enable the wind power generator 4 to be effectively used at sea, and the wind power generator 4 is in the prior art, and will not be described herein too much. The cross-sectional area of the central pontoon 2 is larger than that of the connecting rod 3 and is also larger than that of any structure in the floating frame 1, and the arrangement can ensure that the central pontoon 2 has enough stability, and ensure that any wind driven generator 4 on the floating frame 1 can still be in a stable floating state on the sea after being dismantled. The central pontoon 2 can be provided with equipment houses, such as an inverter, a transformer and the like; the management maintenance room can be arranged, and the function that the offshore wind power equipment can reside in an maintainer can be realized through the structural arrangement of the central pontoon 2.
Compared with the prior art, the synthetic floating type offshore wind turbine foundation utilizes the symmetrical stability of polygons, such as triangles, quadrilaterals, hexagons and the like, and the wind driven generator 4 is arranged on each vertex of the floating frame 1. This structure provides stable support for the individual wind turbines 4, and in particular, they form a large space frame by this combination, which is resistant to the impact of large ocean waves, currents and gushes in sea water, thus providing significant cost savings. Because the structure can be provided with a plurality of special wind driven generators 4, the shutdown of each wind driven generator 4 can not affect the normal power generation of other wind driven generators 4, the utilization rate of the system is improved, the investment income is increased, and meanwhile, the generator of the wind driven generator 4 is arranged at the bottom, so that the maintenance and the overhaul are particularly simple and convenient. The device can also provide structural support for open sea pasture or offshore net cage culture, thereby achieving two purposes and greatly improving the use value of the structure.
As another embodiment of the present utility model, the structure of the composite floating offshore wind turbine foundation is substantially the same as that of the above embodiment, and the difference is that the floating frame 1 includes a connecting piece 11, a first floating rod 12, and a second floating rod 13, wherein the connecting piece 11 is detachably connected with the connecting rod 3 and the supporting buoy 5 at the same time, the engaging position 111 is disposed on the connecting piece 11, the connecting piece 11 is provided with a plurality of connecting pieces 11, and a plurality of connecting pieces 11 are disposed on each vertex of the polygon; the first floating rod 12 is detachably connected with the connecting pieces 11, and a plurality of first floating rods 12 are arranged between two adjacent connecting pieces 11; the second floating rod 13 is detachably connected with the connecting piece 11, the second floating rod 13 is provided with a plurality of connecting pieces 11, the second floating rod 13 is respectively arranged between the two adjacent connecting pieces 11, the arrangement direction of the second floating rod 13 is parallel to the arrangement direction of the first floating rod 12, the second floating rod 13 is arranged on one side, far away from the wind driven generator 4, of the first floating rod 12, namely, the second floating rod 13 is arranged below the first floating rod 12, and the first floating rod 12 and the second floating rod 13 are arranged on each side of the polygon.
In this embodiment, the first floating rod 12 and the second floating rod 13 are both sealed steel pipes with larger diameters, the second floating rod 13 is completely immersed in seawater, one third of the volume of the first floating rod 12 is immersed in seawater for a long time, and the horizontal stability of the floating frame 1 can be ensured to the greatest extent by the arrangement of the structure. The second floating rods 13 are arranged at intervals from the first floating rods 12 in the vertical direction, and the first floating rods 12 are arranged in parallel in the horizontal direction; the second float rod 13 has a diameter greater than the diameter of the first float rod 12. A first supporting frame 14 is arranged between the second floating rod 13 and the two corresponding first floating rods 12, a second supporting frame 15 is arranged between the two first floating rods 12, and the two first supporting frames 14 and the second supporting frames 15 form a triangular frame structure together; the triangular frame structure is provided with a plurality of triangular frame structures side by side along the arrangement direction of the first floating rod 12, so that the stability of each side of the floating frame 1 can be better ensured; the second supporting frames 15 are symmetrically arranged on the first floating rod 12, so that the overall structural stability is better.
In this embodiment, the connecting piece 11 is provided with a first clamping hole for installing the first floating rod 12 and a second clamping hole for installing the second floating rod 13, the first floating rod 12 is provided with a first clamping table adapted to the first clamping hole, the second floating rod 13 is provided with a second clamping table adapted to the second clamping hole, and the first clamping table and the second clamping table are respectively provided with an installation through hole. After the first floating rod 12 is inserted into the first clamping hole and the second floating rod 13 is inserted into the second clamping hole, a plurality of bolts respectively penetrate through the corresponding mounting through holes to be in threaded connection with the connecting piece 11, so that the first floating rod 12 and the second floating rod 13 are mounted and fixed. Here, it is within the scope of the present application to achieve the above-described performance effects of the wind turbine 4 and the floating frame 1.
As another embodiment of the utility model, the structure of such a composite floating offshore wind turbine foundation is substantially the same as in the above-described examples, except that the device further comprises a mooring component connected to the floating frame 1, the mooring component comprising a connecting rope connected to the floating frame 1, the connecting rope being provided with a fixing anchor at the end remote from the floating frame 1, the fixing anchor being fixed to the sea floor or coastal line for fixing the floating frame 1. The floating frame 1 is in a regular triangle structure or a square structure or a regular hexagon structure. The central pontoon 2 may also have a cylindrical structure; one end of the central pontoon 2 close to the wind power generator 4 is higher than one end of the connecting piece 11 close to the wind power generator 4; one end of the connecting piece 11, which is close to the wind driven generator 4, is higher than the first floating rod 12; the outer contour of the cross section of the connecting piece 11 in the horizontal direction is a regular triangle. The connecting piece 11 is provided with a mounting table 112, and the mounting table 112 is a platform matched with the base of the supporting pontoon 5 and is used for supporting and fixing the supporting pontoon 5. The mounting table 112 is provided with a limit groove, the supporting pontoon 5 provided with the wind driven generator 4 is arranged in the limit groove, the supporting pontoon 5 is provided with a through hole, and a bolt penetrates through the through hole and is in threaded connection with a threaded hole on the mounting table 112, so that the wind driven generator 4 is mounted and fixed. It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other. What is not described in detail in the embodiments of the present utility model belongs to the prior art known to those skilled in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A synthetic floating offshore wind turbine foundation comprising:
the floating frame (1) is provided with a clamping position (111), the clamping position (111) is used for installing a supporting pontoon (5) on the wind driven generator (4), and the clamping position (111) is of a structure matched with the supporting pontoon (5);
the floating frame comprises a floating frame (1) and a central pontoon (2), wherein the floating frame (1) is detachably connected with the central pontoon (2) through a connecting rod (3), the connecting rod (3) is provided with a plurality of connecting rods along the circumference of the central pontoon (2), and the central pontoon (2) is arranged at the central position of the floating frame (1).
2. A synthetic floating offshore wind turbine foundation according to claim 1, characterized in that the floating frame (1) comprises:
the connecting piece (11) is detachably connected with the connecting rod (3) and the supporting buoy (5), the clamping positions (111) are arranged on the connecting piece (11), and a plurality of connecting pieces (11) are arranged;
the first floating rods (12) are detachably connected with the connecting pieces (11), and the first floating rods (12) are provided with a plurality of connecting pieces (11) and are respectively arranged between two adjacent connecting pieces (11);
the second floating rod (13) is detachably connected with the connecting pieces (11), the second floating rods (13) are provided with a plurality of connecting pieces and are respectively arranged between two adjacent connecting pieces (11), and the arrangement direction of the second floating rods (13) is parallel to the arrangement direction of the first floating rods (12) and is arranged on one side, far away from the wind driven generator (4), of the first floating rods (12).
3. A synthetic floating offshore wind turbine foundation according to claim 2, characterized in that the second floating bars (13) are arranged at a distance from the first floating bars (12) in the vertical direction, the first floating bars (12) being arranged two by two in parallel in the horizontal direction; the diameter of the second floating rod (13) is larger than that of the first floating rod (12).
4. A synthetic floating offshore wind turbine foundation according to claim 3, characterized in that a first supporting frame (14) is arranged between the second floating rod (13) and the corresponding two first floating rods (12), a second supporting frame (15) is arranged between the two first floating rods (12), and the two first supporting frames (14) and the second supporting frames (15) together form a triangular frame structure; the triangular frame structure is provided with a plurality of triangular frame structures side by side along the arrangement direction of the first floating rod (12).
5. A synthetic floating offshore wind turbine foundation according to claim 1, characterized in that the floating frame (1) is of regular polygonal construction; the central pontoon (2) is of a regular polygon tubular structure with the same shape and different proportion as the floating frame (1).
6. A synthetic floating offshore wind turbine foundation according to claim 2, characterized in that the supporting pontoon (5) is of a triangular prism-shaped structure for mounting the wind power generator (4), and the engagement position (111) is a groove with triangular cross section adapted to the supporting pontoon (5) for engagement with the supporting pontoon (5).
7. A synthetic floating offshore wind turbine foundation according to claim 2, characterized in that the floating frame (1) is of regular triangle or square or regular hexagon construction; or/and the first floating rod (12) and the second floating rod (13) are sealed steel pipes.
8. A synthetic floating offshore wind turbine foundation according to claim 2, characterized in that the end of the central buoy (2) close to the wind turbine (4) is higher than the end of the connection piece (11) close to the wind turbine (4); one end of the connecting piece (11) close to the wind driven generator (4) is higher than the first floating rod (12); the external contour of the cross section of the connecting piece (11) in the horizontal direction is a regular triangle.
9. A synthetic floating offshore wind turbine foundation according to any of claims 1-8, further comprising a mooring element connected to the floating frame (1), the mooring element comprising a connecting rope connected to the floating frame (1), the connecting rope being provided with a fixing anchor at an end remote from the floating frame (1), the fixing anchor being adapted to fix the floating frame (1).
10. A synthetic floating offshore wind turbine foundation according to claim 2, characterized in that the connecting rod (3) comprises a plurality of rod units (31) arranged along the arrangement direction of the central pontoon (2), a reinforcing rod (32) is connected between adjacent rod units (31), and the reinforcing rod (32) is arranged at an angle to the corresponding rod unit (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322292343.7U CN220227081U (en) | 2023-08-25 | 2023-08-25 | Synthetic floating type offshore wind turbine foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322292343.7U CN220227081U (en) | 2023-08-25 | 2023-08-25 | Synthetic floating type offshore wind turbine foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220227081U true CN220227081U (en) | 2023-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322292343.7U Active CN220227081U (en) | 2023-08-25 | 2023-08-25 | Synthetic floating type offshore wind turbine foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220227081U (en) |
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2023
- 2023-08-25 CN CN202322292343.7U patent/CN220227081U/en active Active
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