CN215291309U - Assembly type platform for pouring concrete into steel pipe structure column by foundation pit reverse construction method - Google Patents
Assembly type platform for pouring concrete into steel pipe structure column by foundation pit reverse construction method Download PDFInfo
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- CN215291309U CN215291309U CN202121466915.3U CN202121466915U CN215291309U CN 215291309 U CN215291309 U CN 215291309U CN 202121466915 U CN202121466915 U CN 202121466915U CN 215291309 U CN215291309 U CN 215291309U
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 29
- 239000010959 steel Substances 0.000 title claims abstract description 29
- 230000001681 protective effect Effects 0.000 claims abstract description 22
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000010412 perfusion Effects 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of concrete pouring, and discloses a steel pipe structure column concrete pouring fabricated platform for a foundation pit reverse construction method, which comprises a platform body, wherein the platform body comprises an annular frame which is horizontally arranged and is arranged on an orifice of a tool column, and the annular frame surrounds and forms a hollow area; a support plate is laid on the annular frame and surrounds the periphery of the hollow area; a plurality of longitudinal frames extending downwards longitudinally are connected below the annular frame, the longitudinal frames surround the periphery of the tool post, and bolts penetrate through the longitudinal frames and the side wall of the tool post to fixedly connect the longitudinal frames and the tool post; the periphery of the annular frame is provided with a protective enclosure frame extending upwards, and the protective enclosure frame surrounds the periphery of the annular frame; the annular frame is provided with a stair opening which penetrates up and down; the utility model provides a foundation ditch reverse construction method steel tubular construction post cast in concrete assembled platform has the installation and uses convenient, promote work efficiency, operation safe and reliable and reduce cost's beneficial effect.
Description
Technical Field
The patent of the utility model relates to a cast-in-place concrete's technical field particularly, relates to foundation ditch reverse construction method steel tubular construction post cast-in-place concrete assembled platform.
Background
With the rapid development of modern cities, deep foundation pit engineering scales are larger and larger, and requirements on environmental protection are higher and higher, compared with the traditional foundation pit construction method, the reverse construction method has the advantages of protecting the environment, saving social resources, shortening the construction period and the like, and is widely applied to the deep foundation pit engineering.
The steel pipe structure column is used as a common form of foundation pit reverse construction method construction foundation piles, has very high precision requirement, and is generally positioned by a full-casing rotary drilling machine so as to meet the high precision requirement. The height of the rotary drilling machine is about 3.5m, and the elevation of the top of the steel pipe pile is generally positioned below the ground, so that the top of the steel pipe structure column is generally connected with a tool column for positioning during construction, and the requirement for positioning the hole opening of the full-casing rotary drilling machine is met.
In the process of the steel pipe structure column, the concrete pouring in the steel pipe structure column has a great influence on the whole construction process flow, and the quality of the concrete pouring and the safety of operators are concerned.
In the prior art, generally, after a steel pipe structure column is positioned, a fixed type pouring platform is hung to a hand-held orifice of a tool column, and concrete pouring is carried out on the platform. But receive the elevation of steel tubular structure post and the different influence of tool post length, there is the difference in the elevation position that the tool post exposes ground to the fixed platform operation height that fills can't be fit for all tool post portholes and fill the operation, and the operation personnel need often stand in the eminence and protect the position that lacks and carry out the concrete operation of filling, has great potential safety hazard.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a foundation ditch reverse construction method steel tubular construction post cast in place concrete assembled platform aims at solving prior art, and the platform that fills can't be suitable for the problem of each type of instrument post drill way cast in place concrete.
The utility model discloses a realize like this, foundation ditch reverse construction method steel tubular construction post cast in concrete assembled platform, including the platform body, the platform body includes and is horizontal arrangement and arranges the annular frame on the drill way of instrument post, the annular frame surrounds and is formed with the cavity region, the center alignment of cavity region and the drill way of instrument post arranges; a supporting plate is laid on the annular frame and surrounds the periphery of the hollow area;
a plurality of longitudinal frames extending downwards longitudinally are connected below the annular frame, the longitudinal frames surround the periphery of the tool post, and bolts penetrate through the longitudinal frames and the side wall of the tool post to fixedly connect the longitudinal frames and the tool post; the periphery of the annular frame is provided with a protective enclosure frame extending upwards, and the protective enclosure frame surrounds the periphery of the annular frame; the annular frame is provided with a stair opening which penetrates up and down.
Further, a fit clearance is formed between the longitudinal frame and the outer side wall of the tool post, and a wedge block is inserted into the fit clearance.
Further, a plurality of wedge blocks are inserted into the matching gaps, and the inserting directions of the adjacent wedge blocks into the matching gaps are opposite along the height direction of the longitudinal frame.
Further, the longitudinal frame comprises a longitudinal strip and an inclined strip, the upper end of the longitudinal strip is connected to the annular frame, the lower end of the longitudinal strip extends downwards, and the bolt penetrates through the longitudinal strip and the side wall of the tool post to fix the longitudinal strip on the tool post; the lower end of the inclined strip is connected to the longitudinal strip, and the upper end of the inclined strip is inclined away from the tool post and connected to the annular frame.
Furthermore, two sides of the inclined strip are respectively connected with a reinforcing strip which is arranged in an inclined manner; the lower end of the reinforcing strip is connected to the side face of the inclined strip, the upper end of the reinforcing strip is obliquely arranged away from the inclined strip, and the upper end of the reinforcing strip is connected to the annular frame.
Further, the annular frame has an inner side wall facing the hollow area, the inner side wall of the annular frame has a plurality of positioning plates arranged downward, the plurality of positioning plates are arranged at intervals along the circumferential direction of the hollow area, and the positioning plates are inserted into the tool post and abut against the inner side wall of the tool post.
Further, an intersecting position is formed between the positioning plate and the bottom of the annular frame, a butting block is arranged at the intersecting position, the butting block is provided with a butting surface arranged downwards, the butting surface is obliquely arranged upwards along the extending direction from inside to outside, and the butting surface butts against the top of the tool post.
Further, the annular frame comprises an inner annular strip and an outer annular strip concentrically surrounding the inner annular strip, and a laying area is formed by the inner annular strip and the outer annular strip in a surrounding mode; a plurality of connecting strips are connected between the inner ring strip and the outer ring strip and are arranged along the circumferential extension of the laying area; the inner ring strips are enclosed to form the hollow area; the support plate is laid on the laying area, and the laying area is formed with the stair opening.
Furthermore, the inner ring strip and the outer ring strip are respectively provided with a downward concave step groove, the step grooves are communicated with the laying area, the bottom of each step groove is convexly provided with a plurality of bulges, and the bulges are arranged in an extending manner along the length direction of the step groove; the two sides of the supporting plate are arranged in the step groove, the bottom of the supporting plate is abutted to the protrusion, and a gap is formed between the bottom of the supporting plate and the bottom of the step groove.
Further, a protective net is combined on the periphery of the protective enclosure frame, and the protective net seals the periphery of the protective enclosure frame; the upper end of the protection net is fixedly connected with the top of the protection enclosure frame, the lower end of the protection net bypasses the periphery of the annular frame and is fixedly connected below the annular frame, a concave area which is concave downwards is formed at the bottom of the protection net, and the concave area is formed below the annular frame.
Compared with the prior art, the utility model provides a foundation ditch reverse construction method steel tubular construction post cast in concrete assembled platform has following technical advantage:
1) the platform body is manufactured according to the size of the on-site tool column, the requirement of the pouring operation can be met by hoisting and fixing the platform body on the top of the tool column, the platform body is not influenced by the elevation of the top of the tool column, the applicability is strong, and the installation and the use are convenient;
2) the work efficiency is improved, the platform body is simple in installation steps and short in installation time, the preparation time before concrete pouring of the steel pipe structure column is greatly shortened, and the construction work efficiency is effectively improved;
3) the operation is safe and reliable, and the platform body is arranged at the top of the tool post and is firm and stable; the platform body is fixed with the tool post by adopting a longitudinal frame, and meanwhile, the protective enclosing frame and the ladder are arranged to ensure the safety of operating personnel;
4) the platform body construction consumables are few, and need not to expose the height of a plurality of platform bodies of ground elevation preparation or the leveling platform body according to the instrument post, and single platform body can used repeatedly, resources are saved and cost.
Drawings
Fig. 1 is a schematic flow chart of a fabricated platform for pouring concrete into a steel pipe structural column in a foundation pit reverse construction method provided by the present invention;
fig. 2 is a schematic front view of a platform body provided by the present invention;
fig. 3 is a schematic front view of the engagement between the longitudinal frame and the wedge provided by the present invention;
fig. 4 is a schematic front view of the protective fence frame and the protective net provided by the present invention;
fig. 5 is a schematic drawing of the inner ring strip, the outer ring strip and the supporting plate provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to fig. 1-5, the preferred embodiment of the present invention is shown.
The fabricated platform for pouring concrete into the steel pipe structure column by the foundation pit reverse construction method comprises a platform body, wherein the platform body comprises a horizontally arranged annular frame 100, and the annular frame 100 abuts against an orifice of a tool column; the annular frame 100 encloses a hollow area formed, which is arranged in line with the centre of the aperture of the tool post; the ring frame 100 is laid with a support plate 300, and the support plate 300 surrounds the outer circumference of the hollow area.
A plurality of longitudinal frames extending downwards longitudinally are connected below the annular frame 100, the longitudinal frames are arranged at intervals along the circumferential direction of the tool post, and bolts 104 penetrate through the side walls of the longitudinal frames and the tool post to fixedly connect the longitudinal frames and the tool post; the periphery of the annular frame 100 is provided with a protection surrounding frame 200 extending upwards, and the protection surrounding frame 200 surrounds the periphery of the annular frame 100; the annular frame 100 is provided with a stair opening which penetrates up and down;
the foundation pit reverse construction method steel pipe structure column cast-in-place concrete assembly type platform has the following technical advantages:
1) the platform body is manufactured according to the size of the on-site tool column, the requirement of the pouring operation can be met by hoisting and fixing the platform body on the top of the tool column, the platform body is not influenced by the elevation of the top of the tool column, the applicability is strong, and the installation and the use are convenient;
2) the work efficiency is improved, the platform body is simple in installation steps and short in installation time, the preparation time before concrete pouring of the steel pipe structure column is greatly shortened, and the construction work efficiency is effectively improved;
3) the operation is safe and reliable, and the platform body is arranged at the top of the tool post and is firm and stable; the platform body is fixed with the tool post by adopting a longitudinal frame, and meanwhile, the protective surrounding frame 200 and the ladder are arranged to ensure the safety of operating personnel.
4) The platform body construction consumables are few, and need not to expose the height of a plurality of platform bodies of ground elevation preparation or the leveling platform body according to the instrument post, and single platform body can used repeatedly, resources are saved and cost.
In actual construction, the construction operation can be performed by using the following construction steps:
1) manufacturing a platform body;
2) hoisting the platform body to the hole of the tool post by using a crane, and fixedly connecting the longitudinal frame with the tool post by using a bolt 104 to penetrate through the longitudinal frame and the side wall of the tool post; arranging a ladder on the ground, wherein the upper end of the ladder is abutted against the tool post and is positioned below the ladder opening; thus, the operator can pass through the stair opening through the ladder and climb on the annular frame 100 to perform operation;
3) hoisting the perfusion guide pipe by a crane, wherein the perfusion guide pipe passes through the hollow area and the orifice of the tool column from top to bottom and falls into the tool column;
4) hoisting the perfusion bucket to the annular frame 100 by using a crane, placing the perfusion bucket on the annular frame 100, enabling the lower part of the perfusion bucket to penetrate through the middle hole area and the orifice of the tool column from top to bottom, and butting and communicating the top of the perfusion guide pipe;
5) and pouring concrete downwards through the pouring hopper.
After the bolt 104 is used for fixedly connecting the longitudinal frame and the tool post, a fit clearance is formed between the longitudinal frame and the outer side wall of the tool post, and the wedge block 1021 is inserted into the fit clearance. In this way, the connection between the longitudinal frame and the tool post is more stable, avoiding the phenomenon that the ring frame 100 tilts during the screwing in of the bolt 104 or during the operation.
A plurality of wedge blocks 1021 is inserted in the fitting gap, and the insertion direction of adjacent wedge blocks 1021 into the fitting gap is opposite along the height direction of the longitudinal frame. Like this, through the insertion of a plurality of wedge 1021, can guarantee that vertical frame is in the direction of height, all with the instrument post between the cooperation firm, secondly, through inserting wedge 1021 in the opposite direction in proper order in the both sides of vertical frame, avoid vertical frame one-way skew, on the basis of keeping vertical frame and instrument post firm connection, avoid vertical frame to appear the phenomenon of one-way skew.
The longitudinal frame comprises a longitudinal strip 102 and an inclined strip 101, the upper end of the longitudinal strip 102 is connected to the annular frame 100, the lower end of the longitudinal strip 102 extends downwards, and a bolt 104 penetrates through the longitudinal strip 102 and the side wall of the tool post to fix the longitudinal strip 102 on the tool post; the lower end of the slanted bar 101 is attached to the longitudinal bar 102, and the upper end of the slanted bar 101 is slanted away from the tool post and attached to the ring frame 100. Thus, the inclined strips 101 cooperate with the longitudinal strips 102 to form a whole, which provides better support for the ring frame 100.
Two sides of the inclined strips 101 are respectively connected with reinforcing strips 103, and the reinforcing strips 103 are arranged in an inclined manner; the lower end of the reinforcing strip 103 is connected to the side of the inclined strip 101, the upper end of the reinforcing strip 103 is arranged obliquely away from the inclined strip 101, and the upper end of the reinforcing strip 103 is connected to the ring frame 100.
The two reinforcing strips 103 are symmetrically arranged to support two sides of the inclined strip 101, so that the inclined strip 101, the reinforcing strips 103 and the longitudinal strips 102 are integrally matched to form an integral supporting frame, and the annular frame 100 can be better supported.
The annular frame 100 has an inner side wall facing the hollow area, the inner side wall of the annular frame 100 has a plurality of positioning plates arranged downward, and the plurality of positioning plates are arranged at intervals along the circumference of the hollow area; when the ring frame 100 is placed in the opening of the tool post, the retaining plate is inserted into the tool post and abuts against the inner sidewall of the tool post. Thus, the annular shelf 100 is held firmly on the tool post by the retaining plate and the clamping of the longitudinal shelf against the side wall of the tool post.
An intersection position is formed between the positioning plate and the bottom of the annular frame 100, a butting block is arranged at the intersection position, the butting block is provided with a butting surface which is arranged downwards, and the butting surface is obliquely arranged upwards along the extending direction from inside to outside; when the annular shelf 100 is placed over the aperture of the tool post, the abutment surface abuts the top of the tool post.
Thus, after the annular frame 100 is placed on the tool post, since the top of the tool post abuts against the abutting surface of the abutting block, when the annular frame 100 is subjected to pressure or vibration, since the abutting surface is obliquely arranged upwards along the extending direction from inside to outside, the annular frame 100 is limited from being aligned towards the center position of the tool post, and the annular frame 100 is further stably placed on the tool post.
The annular frame 100 comprises an inner annular strip 303 and an outer annular strip 301 concentrically surrounding the inner annular strip 303, and a laying area is formed by the inner annular strip 303 and the outer annular strip 301 in a surrounding manner; a plurality of connecting strips are connected between the inner ring strip 303 and the outer ring strip 301 and are arranged along the circumferential extension of the laying area; the inner ring strips 303 enclose to form a hollow area; the support plate 300 is laid on a laying area, and a stair opening is formed in the laying area.
The inner ring strip 303 and the outer ring strip 301 are respectively provided with a downward concave step groove, the step grooves are communicated with the laying area, the bottom of each step groove is convexly provided with a plurality of bulges 302, and the bulges 302 are arranged in an extending manner along the length direction of the step groove; after the support plate 300 is placed in the paving area, both sides of the support plate 300 are placed in the stepped groove, the bottom of the support plate 300 abuts on the protrusion 302, and a space is provided between the bottom of the support plate 300 and the bottom of the stepped groove.
Like this, the backup pad 300 can not direct contact be in the bottom in step groove, when follow-up needs dismantle backup pad 300 from between interior ring strip 303 and the outer ring strip 301, easy dismantlement, and when pouring the concrete, even have the concrete to fall on the backup pad 300 after, can not bond between backup pad 300 and the bottom in step groove, the subsequent dismantlement of backup pad 300 of being convenient for.
The periphery of the protective enclosure frame 200 is provided with a protective net 201, and the protective net 201 seals the periphery of the protective enclosure frame 200; the upper end of the protection net 201 is fixedly connected with the top of the protection enclosure frame 200, the lower end of the protection net 201 bypasses the periphery of the annular frame 100 and is fixedly connected below the annular frame 100, a downward concave area 202 is formed at the bottom of the protection net 201, and the concave area 202 is formed below the annular frame 100.
When an operator works on the support plate 300 of the ring frame 100, some articles such as tools can be placed on the support plate 300, so that the articles such as tools can be directly moved from the support plate 300 to the periphery of the ring frame 100 in order to avoid hitting other people due to the ring frame 100 falling from the top, or the tools can fall into the tool posts, and at the moment, the articles such as tools fall into the concave area 202 of the protection net 201 and cannot directly fall on the ground, and the safety is greatly improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The assembly type platform is characterized by comprising a platform body, wherein the platform body comprises an annular frame which is horizontally arranged and is arranged on an orifice of a tool column, the annular frame surrounds and forms a hollow area, and the hollow area is aligned with the center of the orifice of the tool column; a supporting plate is laid on the annular frame and surrounds the periphery of the hollow area;
a plurality of longitudinal frames extending downwards longitudinally are connected below the annular frame, the longitudinal frames surround the periphery of the tool post, and bolts penetrate through the longitudinal frames and the side wall of the tool post to fixedly connect the longitudinal frames and the tool post; the periphery of the annular frame is provided with a protective enclosure frame extending upwards, and the protective enclosure frame surrounds the periphery of the annular frame; the annular frame is provided with a stair opening which penetrates up and down.
2. The fabricated platform of cast-in-place concrete for steel tubular structural columns of foundation pit reverse construction method according to claim 1, wherein a fitting gap is formed between the longitudinal frame and the outer side wall of the tool column, and a wedge block is inserted into the fitting gap.
3. The foundation pit reverse construction method steel pipe structure column cast-in-place concrete fabricated platform of claim 2, wherein a plurality of the wedge blocks are inserted into the fitting gaps, and the insertion direction of the adjacent wedge blocks into the fitting gaps is opposite along the height direction of the longitudinal frame.
4. The foundation pit reverse construction method steel tube structure column pouring concrete fabricated platform of any one of claims 1 to 3, wherein the longitudinal frame comprises a longitudinal bar and an inclined bar, the upper end of the longitudinal bar is connected to the annular frame, the lower end of the longitudinal bar extends downwards, and the bolt penetrates through the longitudinal bar and the side wall of the tool column to fix the longitudinal bar on the tool column; the lower end of the inclined strip is connected to the longitudinal strip, and the upper end of the inclined strip is inclined away from the tool post and connected to the annular frame.
5. The foundation pit reverse construction method steel tube structure column cast-in-place concrete assembly type platform of claim 4, wherein reinforcing strips are connected to two sides of the inclined strips respectively, and the reinforcing strips are arranged in an inclined mode; the lower end of the reinforcing strip is connected to the side face of the inclined strip, the upper end of the reinforcing strip is obliquely arranged away from the inclined strip, and the upper end of the reinforcing strip is connected to the annular frame.
6. A foundation pit reverse construction steel tube structure column cast-in-place concrete fabricated platform as claimed in any one of claims 1 to 3, wherein the annular frame has an inner side wall facing the central hole area, the inner side wall of the annular frame has a plurality of downwardly disposed positioning plates arranged at intervals along the circumference of the hollow area, the positioning plates are inserted into the tool column to abut on the inner side wall of the tool column.
7. The foundation pit reverse construction method steel tube structure column pouring concrete fabricated platform of claim 6, characterized in that the locating plate and the bottom of the annular frame form an intersection position, the intersection position is provided with a butting block, the butting block is provided with a butting surface which is arranged downwards, the butting surface is arranged upwards in an inclined mode along the extension direction from inside to outside, and the butting surface butts against the top of the tool column.
8. The foundation pit reverse construction method steel pipe structure column pouring concrete assembly type platform of any one of claims 1 to 3, wherein the annular frame comprises an inner annular strip and an outer annular strip concentrically surrounding the inner annular strip, and a laying area is formed by the inner annular strip and the outer annular strip in an enclosing mode; a plurality of connecting strips are connected between the inner ring strip and the outer ring strip and are arranged along the circumferential extension of the laying area; the inner ring strips are enclosed to form the hollow area; the support plate is laid on the laying area, and the laying area is formed with the stair opening.
9. The fabricated platform of cast-in-place concrete for steel tubular structural columns of foundation pit reverse construction method according to claim 8, wherein the inner ring strip and the outer ring strip are respectively provided with a downward-concave step groove, the step grooves are communicated with the laying area, the bottom of the step grooves is convexly provided with a plurality of protrusions, and the protrusions extend along the length direction of the step grooves; the two sides of the supporting plate are arranged in the step groove, the bottom of the supporting plate is abutted to the protrusion, and a gap is formed between the bottom of the supporting plate and the bottom of the step groove.
10. The foundation pit reverse construction method steel pipe structure column pouring concrete fabricated platform of any one of claims 1 to 3, wherein a protective net is combined on the periphery of the protective frame, and the protective net closes the periphery of the protective frame; the upper end of the protection net is fixedly connected with the top of the protection enclosure frame, the lower end of the protection net bypasses the periphery of the annular frame and is fixedly connected below the annular frame, a concave area which is concave downwards is formed at the bottom of the protection net, and the concave area is formed below the annular frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121466915.3U CN215291309U (en) | 2021-06-29 | 2021-06-29 | Assembly type platform for pouring concrete into steel pipe structure column by foundation pit reverse construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121466915.3U CN215291309U (en) | 2021-06-29 | 2021-06-29 | Assembly type platform for pouring concrete into steel pipe structure column by foundation pit reverse construction method |
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| Publication Number | Publication Date |
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| CN215291309U true CN215291309U (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121466915.3U Active CN215291309U (en) | 2021-06-29 | 2021-06-29 | Assembly type platform for pouring concrete into steel pipe structure column by foundation pit reverse construction method |
Country Status (1)
| Country | Link |
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| CN (1) | CN215291309U (en) |
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2021
- 2021-06-29 CN CN202121466915.3U patent/CN215291309U/en active Active
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