CN221168354U - Self-heat-preservation building block and wall body - Google Patents
Self-heat-preservation building block and wall body Download PDFInfo
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- CN221168354U CN221168354U CN202322798939.4U CN202322798939U CN221168354U CN 221168354 U CN221168354 U CN 221168354U CN 202322798939 U CN202322798939 U CN 202322798939U CN 221168354 U CN221168354 U CN 221168354U
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- 238000004321 preservation Methods 0.000 title claims abstract description 73
- 229920002635 polyurethane Polymers 0.000 claims abstract description 12
- 239000004814 polyurethane Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 45
- 239000010959 steel Substances 0.000 claims description 45
- 238000009413 insulation Methods 0.000 claims description 29
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 15
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 10
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000010354 integration Effects 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 27
- 238000010276 construction Methods 0.000 description 11
- 230000003014 reinforcing effect Effects 0.000 description 8
- 239000002699 waste material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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Abstract
The utility model discloses a self-heat-preservation building block and a wall body, which relate to the technical field of heat-preservation building block walls, wherein the self-heat-preservation building block is formed by pouring polyurethane concrete and comprises an inner rib and two identical rectangular mounting plates, the inner rib is provided with two mounting surfaces which are parallel to each other, one side of each of the two mounting plates is fixedly connected with the two mounting surfaces, the inner rib is also provided with a symmetrical surface which is parallel to the two mounting surfaces and has the same distance with the two mounting surfaces, the two mounting plates are symmetrically arranged about the symmetrical surface, and the edge of the end face of each mounting plate, which is close to one side of the inner rib, protrudes out of the mounting surface of the inner rib and has an area larger than the area of any section of the inner rib, which is parallel to each mounting plate; each mounting plate is provided with a first mounting groove, a second mounting groove, a third mounting groove and a fourth mounting groove which can be spliced, and the self-heat-preservation building block can be used for enhancing the integration of the built wall body and simplifying the manufacturing process.
Description
Technical Field
The utility model relates to the technical field of heat-insulating block walls, in particular to a self-heat-insulating block and a wall.
Background
In the current field, most heat-insulating block walls need to be provided with heat-insulating layers independently, the requirements of heat insulation and building structure integration cannot be met, the construction process and the manufacturing process are more complicated, the time is longer, and the heat-insulating interlayer on the wall is easy to damage in the carrying process due to the strength property of the self material; some building blocks are internally provided with heat preservation layers, but filling steps are still needed during the production of the building blocks; the polyurethane is widely applied to the industrial manufacturing process, has good elasticity, wear resistance, higher strength and good heat preservation performance, and is an internationally recognized environment-friendly material. Chinese patent CN203412174U discloses a concrete composite self-heat-preserving block, which is provided with three rows of long grooves penetrating through the upper and lower end surfaces, and a heat-insulating layer made of polyurethane rigid foam is filled in the middle row of long grooves. The building block has heat preservation performance, but the self-heat preservation building block has no structure which can be spliced with other building blocks at the edge of the building block, and the built wall body has poor integrity; in addition, the heat insulation layer still needs to be arranged in the building block, and in the production process of the building block, filling steps are still needed after pouring and demolding, so that the process is complex. Therefore, there is a need for a self-insulating block that enhances the integrity of the wall after construction and simplifies the manufacturing process.
Disclosure of utility model
The utility model aims to provide a self-heat-preservation building block and a wall body, so as to solve the problems in the prior art, strengthen the integrity of the wall body after construction and simplify the manufacturing process.
In order to achieve the above object, the present utility model provides the following solutions:
The utility model provides a self-heat-insulation building block which is formed by pouring polyurethane concrete, wherein the self-heat-insulation building block comprises an inner rib and two identical rectangular mounting plates, the inner rib is provided with two mounting surfaces which are parallel to each other, one side of each of the two mounting plates is fixedly connected with the two mounting surfaces, the inner rib is also provided with a symmetrical surface which is parallel to the two mounting surfaces and has the same distance with the two mounting surfaces, the two mounting plates are symmetrically arranged about the symmetrical surface, and the edge of the end face of each mounting plate, which is close to one side of the inner rib, protrudes out of the mounting surface of the inner rib and has an area larger than the area of any section of the inner rib, which is parallel to each mounting plate; a first mounting groove extending along the length direction of the mounting plate is formed in the long side edge of each mounting plate, which is close to the inner rib, and a second mounting groove extending along the width direction of the mounting plate is formed in the short side edge, which is close to the inner rib; the side of the other long side edge of each mounting plate, which is far away from the inner rib, is provided with a third mounting groove extending along the length direction of the mounting plate, the side of the other short side edge, which is far away from the inner rib, is provided with a fourth mounting groove extending along the width direction of the mounting plate, the first mounting groove is used for being spliced with the third mounting groove on other self-heat-insulation building blocks, and the second mounting groove is used for being spliced with the fourth mounting groove on other self-heat-insulation building blocks.
Preferably, the self-heat-preservation building block is formed by pouring recycled thermoplastic polyurethane concrete.
Preferably, the mounting plate comprises an inner mounting plate and an outer mounting plate, one side of the inner mounting plate is fixedly connected with the inner rib, one side of the outer mounting plate is fixedly connected with one side of the outer mounting plate far away from the inner rib, and the outer mounting plate is staggered by equal distances in the length direction and the width direction of the inner mounting plate relative to the inner mounting plate and forms a first mounting groove, a second mounting groove, a third mounting groove and a fourth mounting groove respectively.
Preferably, the inner rib is a cuboid, and at least two reinforcing steel bar holes penetrating the inner rib in a direction parallel to the mounting surface are formed in the inner rib.
Preferably, the inner rib has a central plane perpendicular to each of the mounting surfaces and dividing the inner rib into two rectangular solid bodies of the same size and shape, and each of the reinforcing bar holes is symmetrically disposed about the central plane.
The utility model also provides a wall body, which comprises a plurality of self-heat-preservation building block layers sequentially arranged from top to bottom, wherein each self-heat-preservation building block layer comprises a plurality of self-heat-preservation building blocks sequentially arranged, and every two adjacent self-heat-preservation building blocks form fixed connection.
Preferably, the self-heat-insulation building block further comprises a plurality of transverse steel bars and a plurality of longitudinal steel bars, wherein two steel bar holes in the self-heat-insulation building block are respectively a first steel bar hole and a second steel bar hole, and the first steel bar holes correspond to the second steel bar holes in other self-heat-insulation building blocks positioned in adjacent layers; at least one longitudinal steel bar is arranged in each vertically communicated steel bar hole, one end of each longitudinal steel bar is fixedly connected to the ground, and the other end extends out of the self-heat-preservation building block layer at the top; after the self-heat-preservation building blocks are spliced, cavities between the inner ribs and the mounting plates on the adjacent self-heat-preservation building block layers are transverse filling areas, at least one transverse reinforcing steel bar is arranged in each transverse filling area, and two ends of each transverse reinforcing steel bar extend out of two ends of each transverse filling area respectively; and the intersection points of the transverse steel bars and the longitudinal steel bars form fixed connection.
Preferably, each of the transverse reinforcing bars and each of the longitudinal reinforcing bars are bound and fixed at the intersection point.
Preferably, cavities between the inner ribs and the mounting plates, which are adjacent to each other, on the same self-heat-insulation block layer are longitudinal filling areas, filling grouting materials in the transverse filling areas, the longitudinal filling areas and the reinforcing steel bar holes are solidified to form grouting layers, and the grouting layers can bond the self-heat-insulation blocks, the transverse reinforcing steel bars and the longitudinal reinforcing steel bars.
Compared with the prior art, the utility model has the following technical effects:
according to the self-heat-preservation building block provided by the utility model, the waste concrete is processed to form the recycled concrete material and is mixed with the processed TPU material to form the polyurethane concrete, the polyurethane concrete has a low heat conductivity coefficient, the self-heat-preservation building block can play a good role in heat preservation, and in the manufacturing process, after pouring and demolding are completed, other filling steps are not needed, and the self-heat-preservation building block is directly used for construction. During construction, the self-heat-preservation building blocks at one position and the self-heat-preservation building blocks on different layers can be spliced through the engagement of the first mounting groove and the third mounting groove on other self-heat-preservation building blocks; the self-heat-preservation building blocks at one position can be spliced with the self-heat-preservation building blocks adjacent to the same layer through the mutual occlusion of the second mounting groove and the fourth mounting groove. Therefore, the connection between the self-heat-preservation building blocks is tighter, and the built wall body is stronger in integration. Therefore, the self-heat-preservation building blocks and the wall body provided by the utility model have the advantages that the installation grooves which can mutually splice different self-heat-preservation building blocks are arranged, so that the connection among the self-heat-preservation building blocks is tighter, and the built wall body has stronger integrity; the polyurethane concrete is used, so that the self-heat-preservation building block has heat preservation performance after pouring and demolding are completed, and the manufacturing process is simplified.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a three-dimensional structure diagram of a self-heat-preservation building block provided by the utility model;
fig. 2 is a perspective structure diagram of a wall body provided by the utility model.
In the figure: 1-self-heat-preservation building block, 11-inner rib, 12-mounting plate, 121-inner mounting plate, 122-outer mounting plate, 13-reinforcing steel bar hole, 131-first reinforcing steel bar hole, 132-second reinforcing steel bar hole, 14-third mounting groove, 15-fourth mounting groove, 3-transverse filling area, 4-longitudinal filling area, 5-transverse reinforcing steel bar, 6-longitudinal reinforcing steel bar and 7-self-heat-preservation building block layer.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a self-heat-preservation building block and a wall body, which are used for solving the problems existing in the prior art, enhancing the integrity of the wall body after construction and simplifying the manufacturing process.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
Example 1
The embodiment provides a self-heat-insulation building block, as shown in fig. 1, the self-heat-insulation building block 1 is formed by pouring polyurethane concrete, the self-heat-insulation building block 1 comprises an inner rib 11 and two identical rectangular mounting plates 12, the inner rib 11 is provided with two mounting surfaces which are parallel to each other, one side of each of the two mounting plates 12 is respectively fixedly connected with the two mounting surfaces, the inner rib 11 is also provided with a symmetrical surface which is parallel to the two mounting surfaces and has the same distance with the two mounting surfaces, the two mounting plates 12 are symmetrically arranged about the symmetrical surface, edges of the end surfaces of the mounting plates 12, which are close to one side of the inner rib 11, are protruded from the mounting surfaces of the inner rib 11, and the areas (the areas of the mounting plates 12) are larger than the areas of any sections of the inner rib 11, which are parallel to the mounting plates 12; a first mounting groove extending along the length direction of the mounting plate 12 is formed in the long side edge of one long side of each mounting plate 12, which is close to the inner rib 11, and a second mounting groove extending along the width direction of the mounting plate 12 is formed in the short side edge of one short side of each mounting plate 12; the other long side edge of each mounting plate 12 far away from the inner rib 11 is provided with a third mounting groove 14 extending along the length direction of the mounting plate 12, the other short side edge far away from the inner rib 11 is provided with a fourth mounting groove 14 extending along the width direction of the mounting plate 12, the first mounting groove is used for being spliced with the third mounting groove 14 on the other self-insulation building block 1, and the second mounting groove is used for being spliced with the fourth mounting groove 15 on the other self-insulation building block 1.
The self-heat-preservation building block provided by the embodiment, wherein the waste concrete is processed to form the recycled concrete material and is mixed with the processed TPU material to form polyurethane concrete, the polyurethane concrete has low heat conductivity coefficient, and the self-heat-preservation building block can play a good heat-preservation role. In the manufacturing process, after pouring and demolding are completed, other filling steps are not needed, and the casting and demolding structure is directly used for construction. During construction, the self-heat-preservation building blocks 1 at one position and the self-heat-preservation building blocks 1 on different layers can be spliced through the engagement of the first mounting groove and the third mounting groove 14 on other self-heat-preservation building blocks; through the mutual interlock of second mounting groove and fourth mounting groove 15, self preservation temperature building block 1 of a position just can splice with its adjacent self preservation temperature building block 1 of same layer. Therefore, the connection between the self-heat-preservation building blocks 1 is tighter, and the integration of the built wall is stronger. Therefore, the self-heat-preservation building blocks and the wall body provided by the utility model have the advantages that the installation grooves which can mutually splice different self-heat-preservation building blocks are arranged, so that the connection among the self-heat-preservation building blocks is tighter, and the built wall body has stronger integrity; the polyurethane concrete is used, so that the self-heat-preservation building block has heat preservation performance after pouring and demolding are completed, and the manufacturing process is simplified.
In a preferred embodiment of the present embodiment, the self-heat-insulating block 1 is cast from recycled thermoplastic polyurethane concrete. The recycled concrete material is formed after the waste concrete is treated and is mixed with the treated TPU material, so that the recycled thermoplastic polyurethane concrete can be prepared, and the building blocks made of the recycled thermoplastic polyurethane concrete material can utilize the waste concrete and the waste TPU material to prevent the waste concrete and the waste TPU material from polluting the environment and protect the ecological environment.
In a preferred implementation of this embodiment, the mounting plate 12 includes an inner mounting plate 121 and an outer mounting plate 122, one side of the inner mounting plate 121 forms a fixed connection with the inner rib 11, one side of the outer mounting plate 122 forms a fixed connection with one side of the outer mounting plate 122 away from the inner rib 11, and the outer mounting plate 122 is staggered with respect to the inner mounting plate 121 by equal distances in the length direction and the width direction of the inner mounting plate 121 and forms the first mounting groove, the second mounting groove, the third mounting groove 14, and the fourth mounting groove 15, respectively. The inner mounting plate is equal to the outer mounting plate in the length direction and the width direction misplaced distance of the outer mounting plate, the mounting groove on the previous self-heat-insulation building block can be just spliced with the mounting groove on the other self-heat-insulation building block in a seamless mode, and the spliced self-heat-insulation building blocks are connected more tightly.
In a preferred embodiment of the present embodiment, the inner rib 11 is provided with at least two reinforcing bar holes 13 penetrating the inner rib 11 in a direction parallel to the mounting surface. The reinforcing steel bar holes are vertically communicated with the upper side and the lower side of the self-heat-preserving building block during construction, and the inside of the reinforcing steel bar holes is used for inserting reinforcing steel bars.
In a preferred embodiment of the present embodiment, the inner rib 11 has a center plane perpendicular to each mounting surface and dividing the inner rib 11 into two rectangular solid shapes having the same size and shape, and each reinforcing bar hole 13 is symmetrically disposed about the center plane. The two reinforcing steel bar holes are symmetrically arranged, so that the reinforcing steel bar holes of different layers of staggered joint splicing type self-heat-preservation building blocks can be communicated with each other, and the reinforcing steel bars can be conveniently installed.
Example two
The embodiment provides a wall body, as shown in fig. 1-2, including a plurality of self-heat-preservation building block layers 7 that top-down set gradually, self-heat-preservation building block layers 7 include self-heat-preservation building blocks 1 in a plurality of embodiment one that set gradually, form fixed connection between adjacent respective heat-preservation building blocks 1. The wall body that this embodiment provided, self have heat preservation performance, connect closely between each building block, have stronger wholeness.
In a preferred implementation manner of the embodiment, the wall provided in the embodiment further includes a plurality of transverse steel bars 5 and a plurality of longitudinal steel bars 6, two steel bar holes 13 on the self-insulation building block 1 are respectively a first steel bar hole 131 and a second steel bar hole 132, and the first steel bar hole 131 corresponds to the second steel bar hole 132 on other self-insulation building blocks 1 located on the adjacent layer; at least one longitudinal steel bar 6 is arranged in each vertically communicated steel bar hole 13, one end of each longitudinal steel bar 6 is fixedly connected to the ground, and the other end extends out of the self-heat-insulation building block layer 7 at the top; after the heat-insulating building blocks 1 are spliced, cavities between the inner ribs 11 and the mounting plates 12 on the adjacent self-heat-insulating building block layers 7 are transverse filling areas 3, at least one transverse reinforcing steel bar 5 is arranged in the transverse filling areas 3, and two ends of each transverse reinforcing steel bar 5 extend out of two ends of the transverse filling areas 3 respectively; the intersection points of the transverse steel bars 5 and the longitudinal steel bars 6 form fixed connection. Through setting up horizontal reinforcing bar and longitudinal reinforcement in the wall body inside, form the bar mat, each self preservation temperature building block just is set up in the net hole of bar mat, has improved the wholeness of wall body from this, has also strengthened the intensity of wall body.
In a preferred embodiment of the present embodiment, each transverse reinforcing bar 5 and each longitudinal reinforcing bar 6 are bound and fixed at the intersection point. The transverse steel bars and the longitudinal steel bars are fixedly connected through binding, construction is simple, construction efficiency is high, and operation is convenient.
In a preferred implementation manner of this embodiment, the cavities between the adjacent inner ribs 11 and each mounting plate 12 on the same self-insulation block layer 7 are longitudinal filling areas 4, and the filling grouting materials in each transverse filling area 3, each longitudinal filling area 4 and each steel bar hole 13 are solidified to form a grouting layer, and the grouting layer can bond each insulation block 1, each transverse steel bar 5 and each longitudinal steel bar 6. The grouting material forms a grouting layer after gelation, and bonds and fixes each self-heat-preservation building block, and can bond and fix the transverse steel bars and the longitudinal steel bars, thereby ensuring the stability of the wall body.
The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the utility model.
Claims (9)
1. The utility model provides a self preservation temperature building block which characterized in that: the self-heat-preservation building block is formed by pouring polyurethane concrete and comprises an inner rib and two identical rectangular mounting plates, wherein the inner rib is provided with two mounting surfaces which are parallel to each other, one side of each of the two mounting plates is fixedly connected with the two mounting surfaces respectively, the inner rib is also provided with a symmetrical surface which is parallel to the two mounting surfaces and has the same distance with the two mounting surfaces, the two mounting plates are symmetrically arranged about the symmetrical surface, and the edge of the end face of each mounting plate, which is close to one side of the inner rib, protrudes out of the mounting surface of the inner rib and has an area larger than the area of any section of the inner rib, which is parallel to each mounting plate;
a first mounting groove extending along the length direction of the mounting plate is formed in the long side edge of each mounting plate, which is close to the inner rib, and a second mounting groove extending along the width direction of the mounting plate is formed in the short side edge, which is close to the inner rib; the side of the other long side edge of each mounting plate, which is far away from the inner rib, is provided with a third mounting groove extending along the length direction of the mounting plate, the side of the other short side edge, which is far away from the inner rib, is provided with a fourth mounting groove extending along the width direction of the mounting plate, the first mounting groove is used for being spliced with the third mounting groove on other self-heat-insulation building blocks, and the second mounting groove is used for being spliced with the fourth mounting groove on other self-heat-insulation building blocks.
2. The self-heat-preserving building block of claim 1, wherein: the self-heat-preservation building block is formed by pouring recycled thermoplastic polyurethane concrete.
3. The self-heat-preserving building block of claim 2, wherein: the mounting plate comprises an inner mounting plate and an outer mounting plate, one side of the inner mounting plate is fixedly connected with the inner rib, one side of the outer mounting plate is fixedly connected with one side of the outer mounting plate, which is far away from the inner rib, the outer mounting plate is staggered by equal distances in the length direction and the width direction of the inner mounting plate relative to the inner mounting plate, and a first mounting groove, a second mounting groove, a third mounting groove and a fourth mounting groove are formed respectively.
4. The self-heat-preserving building block of claim 1, wherein: the inner rib is cuboid, and at least two reinforcing steel bar holes penetrating the inner rib in the direction parallel to the mounting surface are formed in the inner rib.
5. The self-heat-preserving building block of claim 4, wherein: the inner rib is provided with a center surface which is perpendicular to each mounting surface and divides the inner rib into two cuboids with the same size and shape, and each reinforcing steel bar hole is symmetrically arranged about the center surface.
6. A wall, characterized in that: the self-heat-preservation building block layer comprises a plurality of self-heat-preservation building blocks which are sequentially arranged from top to bottom, wherein the self-heat-preservation building block layer comprises a plurality of self-heat-preservation building blocks which are sequentially arranged according to any one of claims 1 to 5, and every two adjacent self-heat-preservation building blocks form fixed connection.
7. The wall according to claim 6, wherein: the self-heat-insulation building block further comprises a plurality of transverse steel bars and a plurality of longitudinal steel bars, wherein two steel bar holes in the self-heat-insulation building block are respectively a first steel bar hole and a second steel bar hole, and the first steel bar holes correspond to the second steel bar holes in other self-heat-insulation building blocks positioned in adjacent layers; at least one longitudinal steel bar is arranged in each vertically communicated steel bar hole, one end of each longitudinal steel bar is fixedly connected to the ground, and the other end extends out of the self-heat-preservation building block layer at the top; after the self-heat-preservation building blocks are spliced, cavities between the inner ribs and the mounting plates on the adjacent self-heat-preservation building block layers are transverse filling areas, at least one transverse reinforcing steel bar is arranged in each transverse filling area, and two ends of each transverse reinforcing steel bar extend out of two ends of each transverse filling area respectively; and the intersection points of the transverse steel bars and the longitudinal steel bars form fixed connection.
8. The wall according to claim 7, wherein: and binding and fixing each transverse steel bar and each longitudinal steel bar at the intersection point.
9. The wall according to claim 7, wherein: the cavities between the adjacent inner ribs and the mounting plates on the same self-heat-preservation building block layer are longitudinal filling areas, filling grouting materials in the transverse filling areas, the longitudinal filling areas and the reinforcing steel bar holes are solidified to form grouting layers, and the grouting layers can bond the self-heat-preservation building blocks, the transverse reinforcing steel bars and the longitudinal reinforcing steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322798939.4U CN221168354U (en) | 2023-10-18 | 2023-10-18 | Self-heat-preservation building block and wall body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322798939.4U CN221168354U (en) | 2023-10-18 | 2023-10-18 | Self-heat-preservation building block and wall body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221168354U true CN221168354U (en) | 2024-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322798939.4U Active CN221168354U (en) | 2023-10-18 | 2023-10-18 | Self-heat-preservation building block and wall body |
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| Country | Link |
|---|---|
| CN (1) | CN221168354U (en) |
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2023
- 2023-10-18 CN CN202322798939.4U patent/CN221168354U/en active Active
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