CN216195658U - Lightning protection connection structure in prefabricated outer wall with metal window frame - Google Patents
Lightning protection connection structure in prefabricated outer wall with metal window frame Download PDFInfo
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- CN216195658U CN216195658U CN202122367807.7U CN202122367807U CN216195658U CN 216195658 U CN216195658 U CN 216195658U CN 202122367807 U CN202122367807 U CN 202122367807U CN 216195658 U CN216195658 U CN 216195658U
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- 239000002184 metal Substances 0.000 title claims abstract description 98
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 80
- 239000010959 steel Substances 0.000 claims abstract description 80
- 239000004020 conductor Substances 0.000 claims abstract description 39
- 230000002787 reinforcement Effects 0.000 claims abstract description 17
- 239000011440 grout Substances 0.000 claims abstract description 6
- 210000001503 joint Anatomy 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 25
- 238000013461 design Methods 0.000 abstract description 6
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A lightning protection connecting structure in a prefabricated outer wall containing a metal window frame comprises a first connecting node and a second connecting node, wherein the first connecting node is used for electrically connecting the metal window frame with an upper connecting steel bar and mainly comprises an embedded connecting plate and a connecting conductor; the second connection node is used for electrically connecting the upper connection steel bar and the lower connection steel bar of the grouting sleeve, and the second connection node mainly comprises an upper connection metal part, a lower connection metal part and a conductive spring. This scheme links to each other metal window frame and last connecting reinforcement through pre-buried connecting plate, connecting conductor, utilizes this structure of connecting from top to bottom that present prefabricated outer wall all adopts grout sleeve to realize, makes metal window frame and last connecting reinforcement, connecting reinforcement form the electrically conductive path down, and the lightning protection ground's design is accomplished to make full use of here reinforcing bar, and the construction is more convenient, and the lightning protection ground connection of accomplishing metal window frame inside the prefabricated outer wall is connected, effectively practices thrift the cost, improves construction quality and efficiency.
Description
Technical Field
The utility model relates to the technical field of prefabricated vertical wallboard structures, in particular to a lightning protection connecting structure in a prefabricated outer wall with a metal window frame.
Background
The precast concrete is also called pc (precast concrete) member, and refers to a concrete product produced by standardized and mechanized processing in a factory. The corresponding traditional cast-in-place concrete needs site moulding, site pouring and site maintenance. The concrete prefabricated member is widely applied to the fields of buildings, traffic, water conservancy and the like, and plays an important role in national economy.
The assembled integral type vertical wall plate structure is mostly an assembled integral type concrete structure constructed by adopting prefabricated wall plates, when a prefabricated outer wall is produced, a metal window frame is embedded according to requirements, the attached drawing 1 can be referred to in the lightning protection method for the metal window frame, the existing lightning protection method is that the metal window frame 92 in a prefabricated outer wall 91 plate is connected with a lightning protection device in a main body structure through an embedded connecting plate 95 and an additional connecting conductor 96, and a main rib 931 in a post-cast section of a post-cast section 93 is connected with the lightning protection device in the main body structure, and the method comprises a first method 901 and a second method 902, and is specifically as follows: firstly, a pre-embedded connecting plate 95 is pre-embedded at the top of a metal window frame 92, a section of connecting conductor 96 is led out from the pre-embedded connecting plate 95, the connecting conductor 96 is welded with an in-beam transverse main rib 94 in a top beam 97, when a post-cast section 93 at the side edge of the prefabricated wall panel is provided with a post-cast section in-beam main rib 93 for leading down a reinforcing steel bar, the vertical reinforcing steel bar of the post-cast section in-beam main rib 93 is welded with the in-beam transverse main rib 94 by a section of connecting conductor 96, so that the two are electrically connected, and then the post-cast section in-beam main rib 93 is used as a leading down line to be connected with a main body structure internal lightning protection device (the main body structure internal lightning protection device is of the conventional structure and is not shown in the attached drawing); the second method 902 is to embed an embedded connection plate 95 in the side wall of the metal window frame 92, lead out a section of connection conductor 96 from the embedded connection plate 95, weld the connection conductor 96 with the post-cast section inner main rib 93 inside the post-cast section 93, and then connect the post-cast section inner main rib 93 as a down lead with the lightning protection device inside the main structure. The inventor finds that in the existing method, the additional connecting conductor is exposed and is easily damaged and polluted, and the main rib in the post-cast section needs to be connected in a welding mode on a construction site, so that the construction quality and progress are influenced, the process is troublesome, and the additional connecting conductor is easily damaged when being stacked on the site; the existing prefabricated outer wall is connected up and down by adopting the grouting sleeve 98, the schematic diagrams of the grouting sleeve 98 and the connecting steel bars 99 can be shown in the attached drawing 2, in order to ensure the grouting connection reliability of the steel bar sleeve and the adjustability of the length of the installed steel bars, a certain distance is reserved between the periphery of the connecting steel bars 99 and the inner wall of the sleeve, the vertical connecting steel bars 99 cannot be utilized to enable the metal window frame and the lower structure to form a conductive path, and the connecting steel bars 99 are not fully utilized to complete the design of lightning protection grounding.
In view of this, how to solve the problems that the connection conductor is exposed, is easily damaged and polluted, and the main rib in the post-cast section needs to be connected in a welding manner on a construction site to influence the construction quality and progress, the process is troublesome and the like in the lightning protection method for the metal window frame in the existing prefabricated outer wall is a subject to be researched and solved by the utility model.
Disclosure of Invention
The utility model provides a lightning protection connecting structure in a prefabricated outer wall containing a metal window frame, and aims to solve the problems that a connecting conductor is exposed, is easily damaged and polluted, and a main rib in a post-pouring section needs to be connected in a welding mode on a construction site to influence construction quality and progress, the process is troublesome and the like in the lightning protection method for the metal window frame in the existing prefabricated outer wall, so that the lightning protection grounding design can be skillfully completed by utilizing the structures of a grouting sleeve and a connecting reinforcing steel bar.
In order to achieve the purpose, the utility model provides a lightning protection connecting structure in a prefabricated outer wall containing a metal window frame, which is used for connecting the metal window frame in the prefabricated outer wall in a lightning protection manner, wherein the butt joint parts of an upper connecting steel bar and a lower connecting steel bar between an upper prefabricated outer wall and a lower prefabricated outer wall are connected by a grouting sleeve, and the lightning protection connecting structure is characterized in that: the lightning protection connecting structure comprises a first connecting node and a second connecting node; wherein,
the first connecting node is used for electrically connecting the metal window frame with the upper connecting steel bar, and mainly comprises an embedded connecting plate and a connecting conductor, wherein the embedded connecting plate is embedded and fixed on the side wall of the metal window frame, one end of the connecting conductor is welded and fixed with the embedded connecting plate, and the other end of the connecting conductor is welded and fixed with the connecting steel bar positioned above the embedded connecting plate;
the second connection node is used for electrically connecting the upper connection steel bar and the lower connection steel bar of the grouting sleeve, and mainly comprises an upper connection metal part, a lower connection metal part and a conductive spring, wherein the upper connection metal part is fixedly arranged at the lower end part of the upper connection steel bar, the first end of the conductive spring is fixedly connected below the upper connection metal part, the lower connection metal part is fixedly connected at the second end of the conductive spring, and the elastic shape of the conductive spring is changed into that of the lower connection metal part to provide a downward displacement trend;
the second connection node is configured to: under the butt joint department of last connecting reinforcement, lower connecting reinforcement between upper and lower prefabricated outer wall by grout muffjoint state, the bottom of connecting metal portion leans on with connecting reinforcement down to be connected to form the electrically conductive route of passing through behind first connected node, the second connected node with outside lightning protection device formation of metal window frame.
The utility model is explained below:
1. according to the implementation of the technical scheme, when the connecting steel bars are prefabricated in a factory by the prefabricated outer plate, the upper connecting metal part, the conductive spring and the lower connecting metal part are arranged at the end part of the upper connecting steel bar of the grouting sleeve to form the auxiliary conductive conductor, the metal window frame is connected with the upper connecting steel bar through the pre-buried connecting plate and the connecting conductor to form a conductive path with the external lightning protection device after passing through the first connecting node and the second connecting node, the lower connecting steel bar penetrates into the grouting sleeve in a construction site, the length of the auxiliary conductive conductor exceeds the distance between the original upper connecting steel bar and the original lower connecting steel bar in a loose state, the lower connecting steel bar can be tightly connected with the lower connecting metal part, and the lower connecting metal part is further tightly connected with the lower connecting steel bar in the grouting process of the grouting sleeve to form the conductive path. By the technical means, the problems that a connecting conductor is exposed, is easily damaged and polluted, and a main rib in a post-cast section needs to be connected in a welding mode on a construction site to influence construction quality and progress, the process is troublesome and the like in the lightning protection method for the metal window frame in the existing prefabricated outer wall are solved; meanwhile, the existing prefabricated outer wall is of a structure that the upper connection and the lower connection are realized by adopting the grouting sleeve, so that the metal window frame, the upper connecting steel bars and the lower connecting steel bars form a conductive path, the steel bars at the position are fully utilized to complete the lightning grounding design, the construction is more convenient, the cost is lower, and the construction period is also shortened.
2. In the above technical scheme, the lower surface department of connecting metal portion offers the storage tank that is used for holding connecting reinforcement down, the storage tank forms the opening that supplies connecting reinforcement to pass down downwards towards for make connecting metal portion better must be connected with connecting reinforcement down, produce too much slip, skew when preventing to be connected with connecting reinforcement down, avoid contact failure and influence electric conductive property.
3. In the technical scheme, the position of the embedded connecting plate is located at the bottom of the metal window frame, so that the production is convenient, and the placing of the prefabricated member is more worry-saving when the outer wall is prefabricated in factory production.
4. In the technical scheme, the embedded connecting plate is made of the steel plate, the connecting conductor is made of round steel, and the embedded connecting plate is convenient to take materials, simple to manufacture, low in cost and good in conducting effect.
5. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, coupled between two elements, or coupled in any other manner that does not materially affect the operation of the device, unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
6. In the present invention, the terms "center", "upper", "lower", "axial", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional arrangements shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
Due to the application of the scheme, compared with the prior art, the utility model has the following advantages and effects:
when the connecting steel bars are prefabricated in a factory through the prefabricated outer plate, the end part of the upper connecting steel bar of the grouting sleeve is provided with the upper connecting metal part, the conductive spring and the lower connecting metal part so as to form an auxiliary conductive conductor, the metal window frame is connected with the upper connecting steel bar through the pre-buried connecting plate and the connecting conductor so as to form a conductive path between the metal window frame and an external lightning protection device after passing through the first connecting node and the second connecting node, the lower connecting steel bar is deeply inserted into the grouting sleeve in a construction site, the length of the auxiliary conductive conductor exceeds the distance between the original upper connecting steel bar and the original lower connecting steel bar in a loose state, the lower connecting steel bar can be tightly connected with the lower connecting metal part, and the lower connecting metal part and the lower connecting steel bar are further tightly connected in the grouting process of the grouting sleeve so as to form the conductive path. By the technical means, the problems that a connecting conductor is exposed, is easily damaged and polluted, and a main rib in a post-cast section needs to be connected in a welding mode on a construction site to influence construction quality and progress, the process is troublesome and the like in the lightning protection method for the metal window frame in the existing prefabricated outer wall are solved; meanwhile, the existing prefabricated outer wall is of a structure that the upper connection and the lower connection are realized by adopting the grouting sleeve, so that the metal window frame, the upper connecting steel bars and the lower connecting steel bars form a conductive path, the steel bars at the position are fully utilized to complete the lightning grounding design, the construction is more convenient, the cost is lower, and the production period is also shortened. The lightning-proof grounding connection of the metal window frame is completed inside the prefabricated outer wall, so that the cost is effectively saved, and the construction quality and efficiency are improved.
Drawings
FIG. 1 is a schematic diagram of a first method and a second method for lightning protection of a metal window frame in the prior art;
FIG. 2 is a schematic view of the prior art for connecting a prefabricated exterior wall up and down by using a grouting sleeve;
FIG. 3 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 4 is a schematic side view of a grout sleeve in an embodiment of the present invention;
FIG. 5 is a schematic top view of the grout sleeve assembled with the upper connecting rebar of an embodiment of the present invention;
fig. 6 is a schematic connection diagram of the assembly of the grouting sleeve with the upper connecting steel bars, the lower connecting steel bars and the second connecting nodes in the embodiment of the utility model;
FIG. 7 is an enlarged view of portion A of FIG. 6;
fig. 8 is a schematic structural view of a lower connection metal portion in an embodiment of the present invention.
The drawings are shown in the following parts:
1. a first connection node; 11. pre-burying a connecting plate; 12. a connecting conductor;
2. a second connection node; 21. an upper connection metal portion; 22. a lower connection metal portion; 221. a containing groove; 222. an opening; 23. a conductive spring;
3. prefabricating an outer wall; 4. a metal window frame; 5. connecting steel bars; 6. connecting the steel bars at the lower part; 7. grouting a sleeve;
901. the first method is carried out; 902. step two;
91. prefabricating an outer wall; 92. a metal window frame; 93. post-pouring section; 931. post-cast section inner main reinforcement; 94. transverse main ribs in the beam; 95. pre-burying a connecting plate; 96. a connecting conductor; 97. a top beam; 98. grouting a sleeve; 99. and connecting the reinforcing steel bars.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
As shown in fig. 3 to 8, the lightning protection connection structure in the prefabricated outer wall 3 with the metal window frame 4 according to the embodiment of the present invention is used for performing lightning protection connection on the metal window frame 4 in the prefabricated outer wall 3, and the joints of the upper connecting steel bars 5 and the lower connecting steel bars 6 between the upper prefabricated outer wall and the lower prefabricated outer wall 3 are connected by the grouting sleeve 7; the lightning protection connection structure comprises a first connection node 1 and a second connection node 2. The first connecting node 1 is used for electrically connecting the metal window frame 4 with the upper connecting steel bar 5, the first connecting node 1 mainly comprises an embedded connecting plate 11 and a connecting conductor 12, the embedded connecting plate 11 is embedded and fixed on the side wall of the metal window frame 4, one end of the connecting conductor 12 is welded and fixed with the embedded connecting plate 11, and the other end of the connecting conductor 12 is welded and fixed with the connecting steel bar above; the second connection node 2 is used for electrically connecting an upper connection steel bar 5 and a lower connection steel bar 6 of the grouting sleeve 7, the second connection node 2 mainly comprises an upper connection metal part 21, a lower connection metal part 22 and a conductive spring 23, the upper connection metal part 21 is fixedly arranged at the lower end part of the upper connection steel bar 5, a first end of the conductive spring 23 is fixedly connected below the upper connection metal part 21, the lower connection metal part 22 is fixedly connected at a second end of the conductive spring 23, and the elastic deformation of the conductive spring 23 is changed into that the lower connection metal part 22 provides a downward displacement trend; the second connection node 2 is configured to: under the state that the butt joint of the upper connecting steel bar 5 and the lower connecting steel bar 6 between the upper prefabricated outer wall 3 and the lower prefabricated outer wall is connected through the grouting sleeve 7, the bottom of the lower connecting metal part 22 is connected with the lower connecting steel bar 6 in an abutting mode, and a conductive path is formed between the metal window frame 4 and an external lightning protection device after the metal window frame passes through the first connecting node 1 and the second connecting node 2.
In the above embodiment of the present invention, the lower surface of the lower connecting metal part 22 is provided with an accommodating groove 221 for accommodating the lower connecting steel bar 6, and the accommodating groove 221 faces downward to form an opening 222 for the lower connecting steel bar 6 to pass through, so that the lower connecting metal part 22 can be better connected with the lower connecting steel bar 6, excessive sliding and deviation can be prevented when being connected with the lower connecting steel bar 6, and the influence of poor contact on the conductivity can be avoided.
In the embodiment of the utility model, the position of the embedded connecting plate 11 is positioned at the bottom of the metal window frame 4, so that the production is convenient, and the placement of prefabricated parts is more worry-free when the prefabricated outer wall 3 is produced in a factory; the embedded connecting plate 11 is made of a steel plate, the connecting conductor 12 is made of round steel, and the embedded connecting plate is convenient to take materials, simple to manufacture, low in cost and good in conductive effect.
Through the implementation of the above embodiment of the present invention, when the prefabricated outer panel is prefabricated with the connection steel bars in a factory, the end of the upper connection steel bar 5 of the grouting sleeve 7 is provided with the upper connection metal part 21, the conductive spring 23 and the lower connection metal part 22, so as to form the auxiliary conductive conductor, and the metal window frame 4 and the upper connection steel bar 5 are connected through the pre-buried connection plate 11 and the connection conductor 12, so as to form the conductive path between the metal window frame 4 and the external lightning protection device after passing through the first connection node 1 and the second connection node 2, the lower connection steel bar 6 is inserted into the grouting sleeve 7 in a construction site, because the length of the auxiliary conductive conductor exceeds the distance between the original upper connection steel bar 5 and the original lower connection steel bar 6 in a loose state, the lower connection steel bar 6 can be tightly connected with the lower connection metal part 22, and the lower connection metal part 22 is further tightly connected with the lower connection steel bar 6 in the grouting process of the grouting sleeve 7, a conductive path is formed. Through the technical means, the problems that the connecting conductor 12 is exposed, is easily damaged and polluted, and the main reinforcement in the post-cast section needs to be connected in a welding mode on a construction site to influence construction quality and progress, process is troublesome and the like in the conventional lightning protection method for the metal window frame 4 in the prefabricated outer wall 3 are solved, the first connecting node 1 is arranged in the prefabricated outer wall 3, components such as the pre-embedded connecting plate 11 and the connecting conductor 12 in the first connecting node 1 can be pre-embedded and arranged when the prefabricated outer wall 3 containing the metal window frame 4 is produced, concrete is poured to prepare the prefabricated outer wall 3, construction is not needed after the prefabricated outer wall is hoisted to the site, the site construction steps are reduced, and the construction period is saved; meanwhile, the existing prefabricated outer wall 3 is also utilized to adopt a structure that the grouting sleeve 7 is connected up and down, so that the metal window frame 4, the upper connecting steel bar 5 and the lower connecting steel bar 6 form a conductive path, the steel bars at the position are fully utilized to complete the design of lightning protection grounding, the construction is more convenient, the cost is lower, and the production period is also shortened.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides a lightning protection connection structure in prefabricated outer wall (3) of metal-containing window frame (4) for carry out the lightning protection with metal window frame (4) in prefabricated outer wall (3) and connect, the butt joint department of last connecting reinforcement (5), lower connecting reinforcement (6) between upper and lower prefabricated outer wall (3) is connected by grout sleeve (7), its characterized in that: the lightning protection connecting structure comprises a first connecting node (1) and a second connecting node (2); wherein,
the first connecting node (1) is used for electrically connecting the metal window frame (4) and the upper connecting steel bar (5), the first connecting node (1) mainly comprises an embedded connecting plate (11) and a connecting conductor (12), the embedded connecting plate (11) is embedded and fixed on the side wall of the metal window frame (4), one end of the connecting conductor (12) is welded and fixed with the embedded connecting plate (11), and the other end of the connecting conductor (12) is welded and fixed with the upper connecting steel bar (5) positioned above the embedded connecting plate;
the second connection node (2) is used for electrically connecting an upper connection steel bar (5) and a lower connection steel bar (6) of the grouting sleeve (7), the second connection node (2) mainly comprises an upper connection metal part (21), a lower connection metal part (22) and a conductive spring (23), the upper connection metal part (21) is fixedly arranged at the lower end part of the upper connection steel bar (5), the first end of the conductive spring (23) is fixedly connected below the upper connection metal part (21), the lower connection metal part (22) is fixedly connected at the second end of the conductive spring (23), and the elastic shape of the conductive spring (23) is changed into the elastic shape of the lower connection metal part (22) to provide a downward displacement trend;
the second connection node (2) is configured to: under the butt joint department of last connecting reinforcement (5), lower connecting reinforcement (6) between upper and lower prefabricated outer wall (3) by grout sleeve (7) connected state, the bottom of connecting metal portion (22) leans on with connecting reinforcement (6) down to be connected to form electrically conductive route with outside lightning protection device behind first connected node (1), second connected node (2) in constituting metal window frame (4).
2. Lightning protection connection structure in a prefabricated exterior wall (3) with a metal window frame (4) according to claim 1, characterised in that: the lower surface of the lower connecting metal part (22) is provided with a containing groove (221) for containing the lower connecting steel bar (6), and the containing groove (221) faces downwards to form an opening (222) for the lower connecting steel bar (6) to pass through.
3. Lightning protection connection structure in a prefabricated exterior wall (3) with a metal window frame (4) according to claim 1, characterised in that: the position of the embedded connecting plate (11) is positioned at the bottom of the metal window frame (4).
4. Lightning protection connection structure in a prefabricated exterior wall (3) with a metal window frame (4) according to claim 1, characterised in that: the embedded connecting plate (11) is made of steel plates, and the connecting conductor (12) is made of round steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122367807.7U CN216195658U (en) | 2021-09-28 | 2021-09-28 | Lightning protection connection structure in prefabricated outer wall with metal window frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122367807.7U CN216195658U (en) | 2021-09-28 | 2021-09-28 | Lightning protection connection structure in prefabricated outer wall with metal window frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216195658U true CN216195658U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122367807.7U Active CN216195658U (en) | 2021-09-28 | 2021-09-28 | Lightning protection connection structure in prefabricated outer wall with metal window frame |
Country Status (1)
| Country | Link |
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| CN (1) | CN216195658U (en) |
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2021
- 2021-09-28 CN CN202122367807.7U patent/CN216195658U/en active Active
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