Prefabricated wall connecting structure

Abstract

An assembled wall connecting structure, comprising: a first wallboard provided with a first stepped surface, the first stepped surface comprising a first connecting surface, a second connecting surface and a third connecting surface connected in sequence; a second wallboard provided with a second stepped surface, the second stepped surface being oppositely arranged with the first stepped surface and forming a joint, the second stepped surface comprising a fourth connecting surface, a fifth connecting surface and a sixth connecting surface connected in sequence; a sealing assembly arranged in the joint, the sealing assembly comprising a first sealing member and a second sealing member, the first sealing member abutting between the first connecting surface and the fourth connecting surface and / or between the third connecting surface and the sixth connecting surface, and the second sealing member abutting between the second connecting surface and the fifth connecting surface. In the present application, the sealing assembly is arranged in the joint formed by the first stepped surface and the second stepped surface, and the different parts of the joint are sealed by the first sealing member and the second sealing member respectively, thereby improving the waterproof, moisture-proof and thermal insulation performance of the wall and improving the comfort of living.

Description

Technical Field

[0001] This application relates to the field of building construction technology, specifically to a prefabricated wall connection structure. Background Technology

[0002] With the rapid development of China's economy, the requirements for energy conservation, emission reduction, and sustainable development in the construction industry are constantly increasing, giving rise to new industrialized buildings represented by prefabricated concrete wall panel structures. Prefabricated concrete wall panel structures involve disassembling wall panels, floor slabs, roof panels, stairs, etc., to specific specifications, prefabricating them in a factory, transporting them to the construction site, and then assembling them. However, this process leaves numerous seams between the prefabricated wall panels, which can easily become channels for water seepage.

[0003] In existing technologies, the waterproofing measures for prefabricated concrete wall panel structures involve directly adding sealing strips to the joints. However, the sealing strips have low installation stability and poor durability, which can easily lead to leakage at the joints of prefabricated wall panels, seriously affecting the service life of the building and the comfort of living. Utility Model Content

[0004] The purpose of this application is to provide a prefabricated wall connection structure to solve the problem of poor sealing at the joints of wall panels, which can easily lead to leakage.

[0005] To achieve the objectives of this application, the following technical solution is provided:

[0006] In a first aspect, this application provides a prefabricated wall connection structure, including:

[0007] The first wall panel has a first stepped surface and a first embedded part. The first stepped surface includes a first connecting surface, a second connecting surface and a third connecting surface connected in sequence. The first connecting surface is parallel to the third connecting surface and intersects with the second connecting surface.

[0008] The second wall panel is provided with a second stepped surface and a second embedded part. The second stepped surface is arranged opposite to the first stepped surface and forms a joint. The second stepped surface includes a fourth connecting surface, a fifth connecting surface and a sixth connecting surface connected in sequence. The fourth connecting surface is parallel to the sixth connecting surface and intersects with the fifth connecting surface. The second embedded part is connected to the first embedded part.

[0009] A sealing assembly is disposed within the joint. The sealing assembly includes a first sealing element and a second sealing element. The first sealing element abuts between the first connecting surface and the fourth connecting surface and / or between the third connecting surface and the sixth connecting surface. The second sealing element abuts between the second connecting surface and the fifth connecting surface.

[0010] In one embodiment, the first wall panel includes a first side surface and a second side surface disposed opposite to each other in a first direction, the first step surface is located at one end of the first wall panel along a second direction, the first direction is perpendicular to the second direction, the first connecting surface is connected to the first side surface, and the third connecting surface is connected to the second side surface.

[0011] The second wall panel includes a third side and a fourth side disposed opposite to each other in the first direction, the second step surface is located at one end of the second wall panel along the second direction, the fourth connecting surface is connected to the third side, and the sixth connecting surface is connected to the fourth side.

[0012] The first seal is flush with the first side and the third side, and / or the first seal is flush with the second side and the fourth side.

[0013] In one embodiment, the first connecting surface, the third connecting surface, the fourth connecting surface, and the sixth connecting surface are all parallel to the first direction, and the second connecting surface and the fifth connecting surface are all parallel to the second direction.

[0014] In one embodiment, the first sealing member includes a first sealing strip and a second sealing strip, the first sealing strip abutting between the first connecting surface and the fourth connecting surface, and the first sealing strip being flush with the first side surface and the third side surface;

[0015] The second sealing strip abuts between the third connecting surface and the sixth connecting surface, and the second sealing strip is flush with the second side surface and the fourth side surface.

[0016] In one embodiment, both the first sealing strip and the second sealing strip are MS modified silicone strips.

[0017] In one embodiment, the second sealing element is an EPDM rubber sealing strip.

[0018] In one embodiment, the sealing assembly further includes a third seal, which is disposed between the first seal and the second seal, and abuts against the first connecting surface and the fourth connecting surface and / or the third connecting surface and the sixth connecting surface.

[0019] In one embodiment, the third sealing element is a foam strip.

[0020] In one embodiment, it further includes bolts and nuts, a first end of the first embedded part is disposed in the first wall body, a second end of the first embedded part extends into the joint, the second end of the first embedded part is provided with a threaded hole, and the second embedded part is provided with a connected mounting groove and a through hole;

[0021] The first end of the bolt passes through the through hole and is threaded into the threaded hole, and the second end of the bolt extends into the mounting groove and is threaded into the nut.

[0022] In one embodiment, the bolt is located between the second seal and the third seal.

[0023] Compared with the prior art, this application has at least the following beneficial effects:

[0024] 1. In this application, the structural design of the first step surface and the second step surface provides precise positioning and guidance for the assembly of the first wall panel and the second wall panel, ensuring that the two wall panels can be accurately spliced ​​together, reducing assembly errors, and improving assembly efficiency and quality.

[0025] 2. In this application, the sealing component is placed in the joint formed by the first and second step surfaces, which can better fix the sealing component and prevent it from shifting due to external pressure during installation. Furthermore, the first and second sealing elements in the sealing component seal different parts of the joint, effectively preventing the penetration of moisture, air, and other substances, improving the waterproof, moisture-proof, and thermal insulation performance of the wall, reducing damage to the internal structure of the wall caused by moisture erosion, and improving living comfort.

[0026] 3. In this application, the first and second wall panels are firmly joined together to form a whole through the connection of the first and second embedded parts. Compared with the traditional surface connection method, it can withstand greater external forces, such as wind force and seismic force, thereby improving the stability and reliability of the prefabricated wall under various environmental conditions and reducing the possibility of problems such as loosening and separation of the wall. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a top view of a prefabricated wall connection structure according to one embodiment of this application;

[0029] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0030] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0031] Figure 4 This is a partial structural cross-sectional view of a prefabricated wall connection structure according to one embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100, First wall panel; 110, First step surface; 111, First connecting surface; 112, Second connecting surface; 113, Third connecting surface; 120, First embedded part; 130, First side surface; 140, Second side surface; 200, Second wall panel; 210, Second step surface; 211, Fourth connecting surface; 212, Fifth connecting surface; 213, Sixth connecting surface; 220, Second embedded part; 221, Mounting groove; 230, Third side surface; 240, Fourth side surface; 300, Joint; 410, First sealing element; 411, First sealing strip; 412, Second sealing strip; 420, Second sealing element; 430, Third sealing element; 500, Bolt; 600, Nut; X, First direction; Y, Second direction. Detailed Implementation

[0034] The following are specific embodiments of this application, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of this application. However, this application is not limited to these embodiments.

[0035] refer to Figure 1 , Figure 2 and Figure 3 This application provides a prefabricated wall connection structure, including a first wall panel 100, a second wall panel 200, and a sealing component.

[0036] The first wall panel 100 is provided with a first stepped surface 110 and a first embedded part 120. The first stepped surface 110 includes a first connecting surface 111, a second connecting surface 112 and a third connecting surface 113 connected in sequence. The first connecting surface 111 and the third connecting surface 113 are parallel, and the first connecting surface 111 and the second connecting surface 112 intersect to form a certain angle. This structural design increases the structural complexity of the first wall panel 100, and also provides a specific contact surface for the connection with the second wall panel 200.

[0037] The second wall panel 200 is provided with a second stepped surface 210 and a second embedded part 220. The second stepped surface 210 is arranged opposite to the first stepped surface 110 to form a joint 300. The second stepped surface 210 includes a fourth connecting surface 211, a fifth connecting surface 212, and a sixth connecting surface 213 connected in sequence. The fourth connecting surface 211 and the sixth connecting surface 213 are parallel, and the fourth connecting surface 211 intersects with the fifth connecting surface 212. This matches the intersection relationship of the first connecting surface 111 and the second connecting surface 112 of the first wall panel 100, so that the first wall panel 100 and the second wall panel 200 can fit tightly together at the joint 300. The function of the second embedded part 220 is to connect with the first embedded part 120 on the first wall panel 100, thereby fixing and connecting the first wall panel 100 and the second wall panel 200, ensuring that the first wall panel 100 and the second wall panel 200 can form a stable integral structure after assembly.

[0038] The sealing assembly is located within the joint 300. The sealing assembly includes a first sealing element 410 and a second sealing element 420. The first sealing element 410 abuts between the first connecting surface 111 and the fourth connecting surface 211 and / or between the third connecting surface 113 and the sixth connecting surface 213. The second sealing element 420 abuts between the second connecting surface 112 and the fifth connecting surface 212.

[0039] Specifically, the first wall panel 100 and the second wall panel 200 form an interlocking structure through the cooperation of the first stepped surface 110 and the second stepped surface 210, and a sealing component is provided in the joint 300. The first sealing element 410 is pressed between the first connecting surface 111 and the fourth connecting surface 211 and / or between the third connecting surface 113 and the sixth connecting surface 213 to form an auxiliary sealing interface, and the second sealing element 420 is pressed between the second connecting surface 112 and the fifth connecting surface 212 to form a main sealing interface. When the first wall panel 100 and the second wall panel 200 are subjected to external forces and undergo slight displacement, the intersection angle design of the second connecting surface 112 and the fifth connecting surface 212 allows the second sealing element 420 to undergo elastic deformation to absorb the displacement, while the parallel arrangement of the first connecting surface 111 and the fourth connecting surface 211, the third connecting surface 113 and the sixth connecting surface 213 maintains the stable compression state of the first sealing element 410. A rigid node is formed by connecting the first embedded part 120 and the second embedded part 220 to limit the relative displacement between the first wall panel 100 and the second wall panel 200, ensuring that the sealing assembly is always within the effective compression range.

[0040] In this application, the structural design of the first step surface 110 and the second step surface 210 provides precise positioning and guidance for the assembly of the first wall panel 100 and the second wall panel 200, ensuring that the two wall panels can be accurately spliced ​​together, reducing assembly errors, and improving assembly efficiency and quality. Placing the sealing component in the joint 300 formed by the first step surface 110 and the second step surface 210 better secures the sealing component, preventing it from shifting due to external pressure during installation. Furthermore, the first sealing element 410 and the second sealing element 420 in the sealing component seal different parts of the joint 300, effectively preventing the penetration of moisture, air, and other substances, improving the waterproof, moisture-proof, and thermal insulation performance of the wall, reducing damage to the internal structure of the wall caused by moisture erosion, and improving living comfort. Finally, the first wall panel 100 and the second wall panel 200 are firmly joined together through the connection of the first embedded part 120 and the second embedded part 220, forming a unified whole. Compared to traditional surface connection methods, it can withstand greater external forces, such as wind and earthquakes, improving the stability and reliability of prefabricated walls under various environmental conditions and reducing the possibility of problems such as loosening and separation of the walls.

[0041] The first wall panel 100 includes a first side surface 130 and a second side surface 140 disposed opposite to each other in the first direction X. A first step surface 110 is located at one end of the first wall panel 100 along the second direction Y. The first direction X is perpendicular to the second direction Y. A first connecting surface 111 is connected to the first side surface 130, and a third connecting surface 113 is connected to the second side surface 140. The second wall panel 200 includes a third side surface 230 and a fourth side surface 240 disposed opposite to each other in the first direction X. A second step surface 210 is located at one end of the second wall panel 200 along the second direction Y. A fourth connecting surface 211 is connected to the third side surface 230, and a sixth connecting surface 213 is connected to the fourth side surface 240. A first sealing member 410 is flush with the first side surface 130 and the third side surface 230, and / or, the first sealing member 410 is flush with the second side surface 140 and the fourth side surface 240.

[0042] Wherein, the first direction X is the thickness direction of the first wall panel 100 or the second wall panel 200, and the second direction Y is the length direction of the first wall panel 100 or the second wall panel 200. The first side 130 and the second side 140 are the facades of the first wall panel 100 on both sides of the thickness direction, respectively, and the third side 230 and the fourth side 240 are the facades of the second wall panel 200 on both sides of the thickness direction, respectively.

[0043] Specifically, when the first wall panel 100 and the second wall panel 200 are joined along the second direction Y, the first connecting surface 111 of the first step surface 110 and the fourth connecting surface 211 of the second step surface 210 form a parallel gap, and the third connecting surface 113 and the sixth connecting surface 213 form another parallel gap. The first seal 410 is configured to be flush with both the first side surface 130 and the third side surface 230, or flush with both the second side surface 140 and the fourth side surface 240. During installation, the vertical reference surface formed by the sides of the first wall panel 100 and the second wall panel 200 guides the first seal 410 to be accurately positioned, so that the first seal 410 will not shift when subjected to lateral loads. When the first seal 410 is configured with double flushing, the first seal 410 forms a symmetrical sealing structure on both sides of the first wall panel 100 and the second wall panel 200, effectively dispersing stress and preventing unilateral seal failure.

[0044] In this embodiment, the first connecting surface 111, the third connecting surface 113, the fourth connecting surface 211, and the sixth connecting surface 213 are all parallel to the first direction X, and the second connecting surface 112 and the fifth connecting surface 212 are all parallel to the second direction Y. Specifically, when the first wall panel 100 and the second wall panel 200 are spliced, the first connecting surface 111 and the fourth connecting surface 211 form parallel surfaces through a plane parallel to the first direction X, the third connecting surface 113 and the sixth connecting surface 213 also maintain a parallel relationship, and the second connecting surface 112 and the fifth connecting surface 212 form a perpendicular connection along the second direction Y. By limiting the directional dimension of each connecting surface, the sealing assembly can generate controllable deformation in a single direction, effectively solving the problem of early failure of the sealing assembly of the splice 300 due to uneven stress.

[0045] The first sealing element 410 includes a first sealing strip 411 and a second sealing strip 412. The first sealing strip 411 abuts between the first connecting surface 111 and the fourth connecting surface 211, and is flush with the first side surface 130 and the third side surface 230. The second sealing strip 412 abuts between the third connecting surface 113 and the sixth connecting surface 213, and is flush with the second side surface 140 and the fourth side surface 240. Specifically, when the first wall panel 100 and the second wall panel 200 are connected by embedded parts, the first step surface 110 and the second step surface 210 form a joint 300. The first sealing strip 411 is pressed between the first connecting surface 111 and the fourth connecting surface 211, and its outer edge remains flush with the first side surface 130 and the third side surface 230, forming an outer sealing interface. The second sealing strip 412 is pressed between the third connecting surface 113 and the sixth connecting surface 213, with its outer edge flush with the second side surface 140 and the fourth side surface 240, forming an inner sealing interface. By setting two parallel sealing strips, a double waterproof barrier is formed in the 300-degree direction of the joint. The outer sealing strip directly bears the ambient water pressure, while the inner sealing strip serves as secondary protection. The cavity formed between the two sealing interfaces can effectively block capillary seepage paths.

[0046] The first sealing strip 411 and the second sealing strip 412 are both MS-modified silicone strips, and the second sealing element 420 is an EPDM rubber sealing strip. The MS-modified silicone strip is an elastic sealing material formed by treating silicone as a base material using MS (modified silane) technology. Specifically, it can be pre-formed into a strip structure. The silane groups introduced into its molecular chain can improve UV resistance and weather resistance. This material can produce uniform deformation under pressure, filling the gap between the first step surface 110 and the second step surface 210. The EPDM rubber sealing strip is a synthetic rubber material polymerized from ethylene, propylene, and non-conjugated dienes as monomers. Specifically, it can be prepared into a strip-shaped sealing element using a compression molding process. This material plays an elastic sealing role in the sealing assembly. The saturated main chain in its molecular structure gives it weather resistance and anti-aging ability, enabling it to withstand the compressive stress caused by wall deformation at the joint 300, preventing gaps from forming at the sealing interface.

[0047] In one embodiment, the sealing assembly further includes a third seal 430, which is disposed between the first seal 410 and the second seal 420, and abuts against the first connecting surface 111 and the fourth connecting surface 211 and / or the third connecting surface 113 and the sixth connecting surface 213. Specifically, the third seal 430 is provided inside the joint 300, and is compressed and filled in the gap between the first seal 410 and the second seal 420, forming multiple sealing barriers. When the first wall panel 100 and the second wall panel 200 are affected by external loads or temperature changes, the elastic deformation of the third seal 430 can offset part of the displacement, preventing the sealing structure from cracking due to stress concentration. For example, the third seal 430 together with the first seal 410 and the second seal 420 constitutes a stepped sealing layer, wherein the first seal 410 is located on the outside of the joint 300, the third seal 430 is located in the middle layer, and the second seal 420 is located on the inside. The three-layer structure works together to effectively prevent water from seeping along the joint 300, significantly improving the redundancy and reliability of the waterproofing system.

[0048] Specifically, the third sealing element 430 can be implemented using a foam strip. The foam strip has elastic compression characteristics and can form a buffer layer in the joint 300 to absorb the deformation and displacement of the first wall panel 100 and the second wall panel 200 caused by temperature changes or external forces.

[0049] refer to Figure 1 and Figure 4 The prefabricated wall connection structure also includes bolts 500 and nuts 600. The first end of the first embedded part 120 is located in the first wall body, and the second end of the first embedded part 120 extends into the joint 300. The second end of the first embedded part 120 is provided with a threaded hole. The second embedded part 220 is provided with a connected mounting groove 221 and a through hole. The first end of the bolt 500 passes through the through hole and is threadedly connected to the threaded hole. The second end of the bolt 500 extends into the mounting groove 221 and is threadedly connected to the nut 600.

[0050] Specifically, the first embedded part 120 is threadedly connected to the bolt 500 through a threaded hole at its second end. The second embedded part 220 guides the bolt 500 through a through hole and achieves bidirectional locking through a nut 600 in the mounting groove 221. After the bolt 500 passes through the through hole and is screwed into the threaded hole, its end extends into the mounting groove 221 to engage with the nut 600. Tightening the nut 600 generates an axial preload between the two embedded parts. This connection method allows the first wall panel 100 and the second wall panel 200 to form a rigid connection at the joint 300, while also allowing for minor position adjustments during construction.

[0051] This application, through the mechanical connection of bolts 500 and nuts 600, not only achieves rapid assembly but also allows for adjustment of the relative positions between wall panels during installation, solving the misalignment problem of the joint 300 caused by dimensional errors in prefabricated components. The tightness of the bolts 500 can be adjusted by rotating the nuts 600, ensuring that the joint 300 between the first wall panel 100 and the second wall panel 200 is stably compressed. The space of the mounting groove 221 allows the nuts 600 to remain in a fixed position during tightening and also protects the bolts 500 and nuts 600.

[0052] Furthermore, bolt 500 is located between the second seal 420 and the third seal 430. Specifically, the installation position of bolt 500 is limited to the joint 300 area between the second seal 420 and the third seal 430. The second seal 420, made of EPDM rubber, can form an elastic wrap around bolt 500, while the third seal 430, made of foam, can absorb minor displacements that may occur at the bolt 500 connection, preventing the sealing structure from failing due to mechanical stress concentration, and ensuring that bolt 500 will not loosen or corrode due to environmental factors during long-term use.

[0053] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0054] Furthermore, the use of terms such as "first," "second," and "a" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0056] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

Claims

1. A prefabricated wall connection structure, characterized in that, include: The first wall panel has a first stepped surface and a first embedded part. The first stepped surface includes a first connecting surface, a second connecting surface and a third connecting surface connected in sequence. The first connecting surface is parallel to the third connecting surface and intersects with the second connecting surface. The second wall panel is provided with a second stepped surface and a second embedded part. The second stepped surface is arranged opposite to the first stepped surface and forms a joint. The second stepped surface includes a fourth connecting surface, a fifth connecting surface and a sixth connecting surface connected in sequence. The fourth connecting surface is parallel to the sixth connecting surface and intersects with the fifth connecting surface. The second embedded part is connected to the first embedded part. A sealing assembly is disposed within the joint. The sealing assembly includes a first sealing element and a second sealing element. The first sealing element abuts between the first connecting surface and the fourth connecting surface and / or between the third connecting surface and the sixth connecting surface. The second sealing element abuts between the second connecting surface and the fifth connecting surface.

2. The prefabricated wall connection structure according to claim 1, characterized in that, The first wall panel includes a first side surface and a second side surface disposed opposite to each other in a first direction, the first step surface is located at one end of the first wall panel along a second direction, the first direction is perpendicular to the second direction, the first connecting surface is connected to the first side surface, and the third connecting surface is connected to the second side surface; The second wall panel includes a third side and a fourth side disposed opposite to each other in the first direction, the second step surface is located at one end of the second wall panel along the second direction, the fourth connecting surface is connected to the third side, and the sixth connecting surface is connected to the fourth side. The first seal is flush with the first side and the third side, and / or the first seal is flush with the second side and the fourth side.

3. The prefabricated wall connection structure according to claim 2, characterized in that, The first connecting surface, the third connecting surface, the fourth connecting surface, and the sixth connecting surface are all parallel to the first direction, and the second connecting surface and the fifth connecting surface are all parallel to the second direction.

4. The prefabricated wall connection structure according to claim 2, characterized in that, The first sealing element includes a first sealing strip and a second sealing strip. The first sealing strip abuts between the first connecting surface and the fourth connecting surface, and the first sealing strip is flush with the first side surface and the third side surface. The second sealing strip abuts between the third connecting surface and the sixth connecting surface, and the second sealing strip is flush with the second side surface and the fourth side surface.

5. The prefabricated wall connection structure according to claim 4, characterized in that, Both the first sealing strip and the second sealing strip are MS modified silicone strips.

6. The prefabricated wall connection structure according to claim 1, characterized in that, The second sealing element is an EPDM rubber sealing strip.

7. The prefabricated wall connection structure according to claim 1, characterized in that, The sealing assembly further includes a third sealing element, which is disposed between the first sealing element and the second sealing element, and abuts against the first connecting surface and the fourth connecting surface and / or the third connecting surface and the sixth connecting surface.

8. The prefabricated wall connection structure according to claim 7, characterized in that, The third sealing element is a foam strip.

9. The prefabricated wall connection structure according to claim 7, characterized in that, It also includes bolts and nuts. The first end of the first embedded part is located inside the first wall panel, and the second end of the first embedded part extends into the joint. The second end of the first embedded part is provided with a threaded hole, and the second embedded part is provided with a connected mounting groove and a through hole. The first end of the bolt passes through the through hole and is threaded into the threaded hole, and the second end of the bolt extends into the mounting groove and is threaded into the nut.

10. The prefabricated wall connection structure according to claim 9, characterized in that, The bolt is located between the second seal and the third seal.

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