CN220847051U - Outer-wrapping type adjustable slope shock absorbing and isolating device - Google Patents
Outer-wrapping type adjustable slope shock absorbing and isolating device Download PDFInfo
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- CN220847051U CN220847051U CN202322297329.6U CN202322297329U CN220847051U CN 220847051 U CN220847051 U CN 220847051U CN 202322297329 U CN202322297329 U CN 202322297329U CN 220847051 U CN220847051 U CN 220847051U
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- 230000035939 shock Effects 0.000 title claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 67
- 239000010959 steel Substances 0.000 claims abstract description 67
- 238000009413 insulation Methods 0.000 claims abstract description 27
- 238000012946 outsourcing Methods 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 18
- 230000009466 transformation Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 25
- 238000000034 method Methods 0.000 description 9
- 230000009467 reduction Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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Abstract
The utility model discloses an outsourcing type adjustable slope shock absorbing and isolating device, which comprises: the base steel plate and the fixed steel plate that are parallel to each other are connected with the shock insulation support between the two, the lower surface of base steel plate is connected with concrete foundation, the both sides of fixed steel plate upper surface are connected with two L shape baffles, and every L shape baffle includes erects the limb board, is connected with the horizontal limb board perpendicularly with the base of erectting the limb board, has the longitudinal slope roof beam body between the opposite lateral wall of two erects the limb board, its lower surface with the upper surface part contact of fixed steel plate, the both sides face of longitudinal slope roof beam body hugs closely with the opposite lateral wall of two erects the limb board, it is connected with the longitudinal slope roof beam body to erect the limb board through many roof beam fixing screw rods, be provided with between longitudinal slope roof beam body lower surface and the fixed steel plate upper surface and paste the slope layer. The problem of construction complex operation when the old bridge with the anti-seismic transformation requirement is additionally provided with anti-seismic measures can be solved through the scheme.
Description
Technical Field
The utility model relates to the field of bridge shock insulation construction. More particularly, the utility model relates to an outsourcing type adjustable slope shock absorbing and isolating device.
Background
In the middle and late ten days of the 20 th century, large-scale construction activities of basic construction are carried out in various countries including China, a large number of roads and bridges are constructed in the time period, along with the continuous perfection of research on the seismic reduction and isolation theory of the construction, the design specification of roads and bridges in various countries also requires additional seismic isolation measures to be carried out on the structures, the conventional construction means adopted under the conditions of corresponding simple branch bridges and the like are that the connection of the seismic reduction and isolation support and a concrete structure is added between the road bridge and the foundation below the road bridge, but the current seismic reduction and isolation support is generally designed for new construction, a connecting screw rod or a pre-buried steel plate for the seismic reduction and isolation support is reserved on a bridge body in the design stage, and a method for how the support is connected with the concrete structure is still not mature in the old bridge reconstruction engineering.
The conventional method for adding the shock insulation support to the old bridge is to lift the old bridge body, the shock insulation support is needed to be added to the lower surface of the old bridge member, the old bridge body bottom surface is generally processed to be horizontal by adding a fixed steel plate, adding a planted bar or utilizing a concrete pouring mode, then the shock insulation support is placed between the old bridge body and a concrete foundation and is fixed by utilizing a pre-buried fixed screw, the old bridge body is required to be lifted to a higher position for processing the old bridge bottom surface in the process, an anti-overturning measure is adopted, the anti-overturning measure is more complex when the lifting height of the old bridge body is higher, the safety measure for the anti-overturning measure is more strict, and the construction of personnel is in an upward state when the lower surface treatment of the old bridge body is carried out, so that the construction efficiency is lower.
For example, patent CN219195629U discloses an installation structure suitable for the old bridge to reform the shock insulation support, which adopts an adhesive layer between the upper pre-embedded steel plate and the lower pre-embedded steel plate to bond the shock insulation support, and the installation process of the shock insulation support is simplified by using the mode that the adhesive layer is bonded to the shock insulation support, but the method weakens the connection performance between the post-added shock insulation support and the bridge, and the adopted mode of the upper pre-embedded steel plate also needs to construct on the lower surface of the lifted beam body, so that the construction process is necessarily simplified, the construction difficulty of adding the shock insulation support is reduced while the old bridge with all gradient conditions is adapted, and the construction efficiency is improved.
Disclosure of utility model
The utility model aims to provide an outsourcing type adjustable slope seismic reduction and isolation device and an assembly and use method thereof, which can effectively solve the problem of difficult construction when a seismic isolation measure is added to an old bridge on a construction site in the prior art.
To achieve these objects and other advantages and in accordance with the purpose of the utility model, as embodied and broadly described herein, there is provided an exterior-packed type adjustable slope seismic reduction and isolation apparatus comprising:
The base steel plate and the fixed steel plate that are parallel to each other are connected with the shock insulation support between the two, the lower surface of base steel plate is connected with concrete foundation, the both sides of fixed steel plate upper surface are connected with two L shape baffles, and every L shape baffle includes erects the limb board, is connected with the horizontal limb board perpendicularly with the base of erectting the limb board, has the longitudinal slope roof beam body between the opposite lateral wall of two erects limb board, and the both sides face of longitudinal slope roof beam body is hugged closely with the opposite lateral wall of two erects limb board, erect limb board and be connected with the longitudinal slope roof beam body through many roof beam fixing screw rods, be provided with between longitudinal slope roof beam body lower surface and the fixed steel plate upper surface and paste the accent slope layer.
Preferably, a plurality of beam planting holes are symmetrically formed in two sides of the longitudinal slope beam body, the vertical limb plates are provided with first through holes which are identical in diameter and correspond to the beam planting holes one by one, each beam planting hole is sleeved with a beam fixing screw rod in the corresponding first through hole, and one end of each beam planting hole is screwed with a first nut.
Preferably, the shock insulation support comprises a cylinder shell, a plurality of steel plate layers are arranged in the cylinder shell at intervals, a rubber layer is arranged between any two adjacent steel plate layers, and a columnar lead core is communicated between the steel plate layers and the rubber layer.
Preferably, a plurality of triangular stiffening ribs are connected between the transverse limb plate and the vertical limb plate of the L-shaped baffle.
Preferably, the upper surface of the pasting slope adjusting layer is attached to the lower surface of the longitudinal slope beam body, the upper width of the pasting slope adjusting layer in top view is equal to the width of the longitudinal slope beam body, the length is equal to the width of the fixed steel plate, and the pasting slope adjusting layer is made of high-strength gel materials.
Preferably, the base steel plate is provided with a second through hole, the upper surface of the concrete foundation is provided with base bar planting holes, the positions and the diameters of the base bar planting holes are matched with those of the second through holes, each base bar planting hole is sleeved with a base screw rod in the corresponding second through hole, and the end parts of the base screw rods are screwed with second nuts.
Preferably, the transverse limb plate is provided with a third through hole, the fixed steel plate is provided with a fourth through hole, the third through hole and the fourth through hole are the same in size and position and are sleeved with a connecting bolt together, and the end part of the connecting bolt is screwed with a third nut.
Preferably, the thicknesses of the transverse limb plate, the vertical limb plate, the base steel plate and the fixed steel plate are not smaller than 20mm.
The utility model at least comprises the following beneficial effects:
According to the first, the outer-wrapping type adjustable slope seismic isolation device provided by the utility model, the L-shaped baffle plates are adopted to optimize the process of constructing the bottom surface of the longitudinal slope beam body to the two sides of the longitudinal slope beam body through the process of connecting the beam-planting ribs with the longitudinal slope beam body, so that the construction difficulty is reduced, the lifting amount of an old bridge body during construction is reduced, and the anti-overturning engineering amount of the bridge body after lifting is reduced.
The second, the utility model provides the outside-packed adjustable slope shock absorbing and isolating device, which adopts the measure of pasting the slope adjusting layer to make the device suitable for the bridge body with the longitudinal slope.
Drawings
The utility model is described in further detail below with reference to the attached drawings and embodiments:
fig. 1 is a structural diagram of an external-wrapping type adjustable slope seismic isolation and reduction device according to a technical scheme of the utility model.
Fig. 2 is a schematic diagram of an external-wrapping type adjustable slope shock absorbing and isolating device according to an embodiment of the present utility model.
Fig. 3 is a schematic installation diagram of an external-wrapping type adjustable slope shock absorbing and isolating device according to an embodiment of the present utility model.
Detailed Description
The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The terms "transverse," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description of the present utility model based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements 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 present utility model.
As shown in fig. 1-3, the technical scheme of the application provides an outsourcing type adjustable slope shock absorbing and isolating device, which comprises a base steel plate (2) and a fixed steel plate (3) which are parallel to each other, wherein a shock absorbing support (1) is connected between the base steel plate and the fixed steel plate, the lower surface of the base steel plate (2) is connected with a concrete foundation (7), two L-shaped baffles (4) are connected to two sides of the upper surface of the fixed steel plate (3), each L-shaped baffle comprises a vertical limb plate (41), a transverse limb plate (42) is vertically connected to the bottom edge of the vertical limb plate (41), a longitudinal slope beam body (6) is arranged between the opposite side walls of the two vertical limb plates (41), two side surfaces of the longitudinal slope beam body (6) are clung to the opposite side walls of the two vertical limb plates (41), the vertical limb plates (41) are connected with the longitudinal slope beam body (6) through a plurality of beam fixing screws (45), and a pasting slope adjusting layer (5) is arranged between the lower surface of the longitudinal slope beam body (6) and the upper surface of the fixed steel plate (3).
In the technical scheme, the cross section of the longitudinal slope beam body (4) is rectangular, the axis of the longitudinal slope beam body (4) is parallel to the horizontal plane or is inclined, two sides of the longitudinal slope beam body are tightly attached to and connected with vertical limb plates (41) of two L-shaped baffle plates (4), the lower surface of the longitudinal slope beam body (6), the upper surface of a fixed steel plate (3), a space surrounded by the vertical limb plates (41) of the two L-shaped baffle plates (4) is tightly filled by a paste slope adjusting layer (5), the lower surface of a transverse limb plate of the L-shaped baffle plate (4) is connected with the upper surface of a fixed steel plate (3), the fixed steel plate (3) is downwards sequentially arranged and connected with a shock insulation support (1), a base steel plate (2) and a concrete foundation (7) in series, the paste slope adjusting layer (5) simplifies the process that the lower surface of the longitudinal slope beam body (6) needs to be processed before the shock insulation support is additionally arranged, the longitudinal slope beam body (6) transfers the load born by the longitudinal slope beam body and the self-weight of the longitudinal slope beam body to the shock insulation support (1) through the paste slope adjusting layer (5) and the L-shaped baffle plates (4) to the shock insulation support (1), and the shock insulation performance of the longitudinal slope body (1) can be fully exerted between the shock insulation support and the shock insulation support (1).
In another technical scheme, a plurality of beam planting bar holes (60) are symmetrically formed in two sides of the longitudinal slope beam body (6), first through holes (410) with the same diameter and in one-to-one correspondence with the beam planting bar holes (60) are formed in the vertical limb plates (41), beam fixing screws (45) are sleeved in the first through holes (410) corresponding to the beam planting bar holes (60) in a sleeved mode, one end of each beam planting bar hole is screwed with a first nut (450), the mode that the beam fixing screws (45) are planted in the side face of the longitudinal slope beam body (6) enables the lower surface of the longitudinal slope beam body (6) to be free of a drilling hole or additionally provided with steel plates and the like, so that the elevation height of the longitudinal slope beam body (6) in a construction process is reduced while the construction efficiency is improved.
In another technical scheme, the shock insulation support (1) comprises a cylinder shell (10), a plurality of steel plate layers (12) are arranged at intervals in the shock insulation support, a rubber layer (13) is arranged between any two adjacent steel plate layers (12), a columnar lead core (14) is penetrated between each steel plate layer (12) and each rubber layer (13), the shock insulation support (1) is a finished product available in the market, and optionally, the shock insulation support (1) can be a lead core rubber support, a friction pendulum support and the like.
In another technical scheme, a plurality of triangular stiffening ribs (43) are connected between the transverse limb plate (42) and the vertical limb plate (41) of the L-shaped baffle plate (4). The triangular stiffening ribs (43) can improve the deformation resistance of the L-shaped baffle plate (4) and improve the integrity of the device under the action of an earthquake.
In another technical scheme, paste and transfer the laminating of slope layer (5) upper surface the lower surface of longitudinal slope roof beam body (6), paste and transfer the width of slope layer (5) overhead view and be equal to longitudinal slope roof beam body (6) width, length is equal to the width of fixed steel sheet (3), paste and transfer slope layer (5) material and be high strength gel material, fill to through the slip casting mode between the small surface of longitudinal slope roof beam body (6) and the upper surface of fixed steel sheet (3), both sides are sealed the gap by vertical limb board (41) during the slip casting, adopt temporary shutoff measure around, the high strength gel material hardening after filling forms paste and transfer slope layer (5), it can bear the load of longitudinal slope roof beam body (6), optionally, when the longitudinal bridge gradient of longitudinal slope roof beam body (6) is less than 1%, can omit the setting of pasting and transfer slope layer (5).
In another technical scheme, a second through hole (20) is formed in the base steel plate (2), a base bar planting hole (70) is formed in the upper surface of the concrete foundation (7), the position and the diameter of the base bar planting hole are matched with those of the second through holes (20), a base screw (71) is sleeved in each base bar planting hole (70) and the corresponding second through hole (20) together, and a second nut (72) is screwed at the end of each base bar planting hole.
In another technical scheme, third through hole (420) has been seted up to horizontal limb board (42), set up fourth through hole (30) on fixed steel sheet (3), third through hole (420) are the same with fourth through hole (30) size position and overlap jointly and are equipped with connecting bolt (31), and its tip is twisted third nut (32), third through hole (420) are 24mm with fourth through hole (30) internal diameter, adopt bolted connection between horizontal limb board (42) and fixed steel sheet (3) in this technical scheme, optionally horizontal limb board (42) can weld at fixed steel sheet (3) upper surface.
In another technical scheme, the shock absorbing and isolating device of the outer-wrapping type adjustable slope is characterized in that the thicknesses of the transverse limb plate (42), the vertical limb plate (41), the base steel plate (2) and the fixed steel plate (3) are not smaller than 20mm.
According to the structural form of the external-wrapping type adjustable slope shock absorbing and isolating device, the following implementation modes are provided;
firstly, lifting a longitudinal slope beam body (6) and structures such as road surfaces on the longitudinal slope beam body from a concrete foundation (7) to an operation height by using a jack and other jacking devices, arranging beam bar planting holes (60) on two sides of the longitudinal slope beam body (6) by using a drill bit, arranging base bar planting holes (70) on the upper surface of the concrete foundation (7), and inserting base screws (71) into the base bar planting holes (70) after grouting materials.
Step two, placing the shock insulation support (1) connected with the base steel plate (2) and the fixed steel plate (3) between the longitudinal slope beam body (3) and the concrete foundation (7), sleeving a base screw rod (71) in a second through hole (20) formed in the base steel plate (2), and then screwing a second nut (72).
And thirdly, slowly dropping the longitudinal slope beam body (6) until the bottom surface is contacted with the upper surface of the fixed steel plate (3) by utilizing a jacking device, installing an L-shaped baffle plate (4), fixing a transverse limb plate (42) and the fixed steel plate (3) through a connecting bolt (31) and a third nut (32) screwed on the transverse limb plate, at the moment, tightly attaching the vertical limb plate (41) to two sides of the longitudinal slope beam body (6) and aligning the first through holes (410) with the beam reinforcement holes (60), injecting grouting material into the beam reinforcement holes (60) and inserting beam fixing screws (45), screwing the first nuts (450) after the grouting material is solidified and reaches the design strength, and then welding triangular stiffening ribs (43).
And fourthly, plugging a front gap and a rear gap between the longitudinal slope beam body (6) and the fixed steel plate (3) by using a wood template or templates of other materials, reserving a grouting hole on the template, injecting a high-strength gel material into a space between the bottom surface of the longitudinal slope beam body (6) and the fixed steel plate (3) through the grouting hole to form a pasting slope adjusting layer (5), curing until the design strength is achieved, and then enabling the jacking device to fall down so that the dead weight and load of the longitudinal slope beam body (6) are completely borne by a seismic reduction and isolation structure of the outer-wrapping type adjustable slope, and dismantling the jacking device to finish installation.
The number of components and the scale of processing described herein are intended to simplify the description of the present utility model. Applications, modifications and variations of the present utility model will be readily apparent to those skilled in the art.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (8)
1. The utility model provides an adjustable slope of outsourcing subtracts isolation device which characterized in that includes:
Base steel sheet (2) and fixed steel sheet (3) that are parallel to each other are connected with shock insulation support (1) between the two, the lower surface of base steel sheet (2) is connected with concrete foundation (7), the both sides of fixed steel sheet (3) upper surface are connected with two L shape baffles (4), and every L shape baffle includes erects limb board (41), is connected with horizontal limb board (42) perpendicularly with the base of erectting limb board (41), has longitudinal slope roof beam body (6) between the lateral wall that two erects limb board (41) are relative, and the both sides face and the lateral wall that two erects limb board (41) are relative hugged closely of longitudinal slope roof beam body (41), erect limb board (41) and be connected with longitudinal slope roof beam body (6) through many roof beam fixing screw rods (45), be provided with between longitudinal slope roof beam body (6) lower surface and the fixed steel sheet (3) upper surface and paste and transfer slope layer (5).
2. The outsourcing type adjustable slope shock absorbing and isolating device according to claim 1, characterized in that a plurality of beam planting rib holes (60) are symmetrically formed in two sides of the longitudinal slope beam body (6), first through holes (410) which are identical in diameter and correspond to the beam planting rib holes (60) one by one are formed in the vertical limb plates (41), beam fixing screws (45) are sleeved in the beam planting rib holes (60) and the corresponding first through holes (410) together, and first nuts (450) are screwed at one ends of the beam planting rib holes.
3. The outsourcing type adjustable slope shock absorbing and isolating device according to claim 1, characterized in that the shock absorbing and isolating support (1) comprises a cylinder shell (11), a plurality of steel plate layers (12) are arranged in the cylinder shell at intervals, a rubber layer (13) is arranged between any two adjacent steel plate layers (12), and a columnar lead core (14) is communicated between the steel plate layers (12) and the rubber layer (13).
4. The outsourcing type adjustable slope damping and isolation device according to claim 1, characterized in that a plurality of triangular stiffening ribs (43) are connected between the transverse limb plates (42) and the vertical limb plates (41) of the L-shaped baffle plate (4).
5. The outer-wrapping type adjustable slope shock absorbing and isolating device according to claim 1, wherein the upper surface of the pasting slope adjusting layer (5) is attached to the lower surface of the longitudinal slope beam body (6), the width of the pasting slope adjusting layer (5) in top view is equal to the width of the longitudinal slope beam body (6), the length of the pasting slope adjusting layer is equal to the width of the fixed steel plate (3), and the pasting slope adjusting layer (5) is made of high-strength gel materials.
6. The outsourcing type adjustable slope shock absorbing and isolating device according to claim 1, characterized in that a second through hole (20) is formed in the base steel plate (2), a base reinforcement hole (70) is formed in the upper surface of the concrete foundation (7), the position and the diameter of the base reinforcement hole are matched with those of the second through hole (20), a base screw (71) is sleeved in each base reinforcement hole (70) and the corresponding second through hole (20), and a second nut (72) is screwed at the end of each base reinforcement hole.
7. The outer-wrapping type adjustable slope shock absorbing and isolating device according to claim 1, wherein the transverse limb plate (42) is provided with a third through hole (420), the fixed steel plate (3) is provided with a fourth through hole (30), the third through hole (420) and the fourth through hole (30) are the same in size and position and are sleeved with a connecting bolt (31) together, and the end part of the connecting bolt is screwed with a third nut (32).
8. The outsourcing type adjustable slope damping and insulation device according to claim 1, characterized in that the thickness of the transverse limb plate (42), the vertical limb plate (41), the base steel plate (2) and the fixed steel plate (3) is not smaller than 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322297329.6U CN220847051U (en) | 2023-08-25 | 2023-08-25 | Outer-wrapping type adjustable slope shock absorbing and isolating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322297329.6U CN220847051U (en) | 2023-08-25 | 2023-08-25 | Outer-wrapping type adjustable slope shock absorbing and isolating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220847051U true CN220847051U (en) | 2024-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322297329.6U Active CN220847051U (en) | 2023-08-25 | 2023-08-25 | Outer-wrapping type adjustable slope shock absorbing and isolating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220847051U (en) |
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2023
- 2023-08-25 CN CN202322297329.6U patent/CN220847051U/en active Active
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