A self-expanding external wall bolt hole sealing structure

Abstract

This utility model discloses a self-expanding external wall screw hole sealing structure, relating to the field of building construction technology. The utility model includes a screw hole, inside which a sealing component and a self-expanding component are installed. This utility model utilizes a hollow sealing rod and a reusable adjusting rod to work together to inject silicone-based self-expanding sealant and closed-cell polyurethane foam in stages. After the adjusting rod is inserted into the sealing rod, the positioning plate contacts the external wall, triggering the injection of sealant into the first injection hole. The silicone-based self-expanding sealant expands and fills the micro-cracks in the inner wall of the hole, achieving a noise reduction effect. Subsequently, the adjusting rod is pulled out, and closed-cell polyurethane foam is injected through the second injection hole to further fill the gaps, achieving a waterproof effect. This staged injection process avoids cross-contamination of materials. The elasticity of the silicone-based self-expanding sealant and the sound absorption properties of the closed-cell foam work synergistically to significantly improve waterproofing and noise reduction effects, blocking moisture penetration and sound wave transmission paths.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and in particular relates to a self-expanding external wall bolt hole sealing structure. Background Technology

[0002] External wall bolt holes are holes left during building construction due to the use of bolts to fix formwork. If not effectively sealed, these holes can easily become channels for rainwater infiltration, heat loss, and noise transmission, leading to problems such as dampness in the wall, reduced thermal insulation performance, and structural safety hazards. Sealing structures aim to restore wall continuity and ensure the building's waterproofing, thermal insulation, and durability through material filling and sealing design.

[0003] Traditional sealing methods mainly rely on grouting ordinary mortar or cement-based materials, which have the following significant drawbacks: after the mortar has cured, rainwater or moisture can seep into the screw hole along the crack; the mortar has a high density but poor sound absorption performance, making it difficult to block external noise from being transmitted through the hole. To address these issues, we provide a self-expanding external wall screw hole sealing structure. Utility Model Content

[0004] The purpose of this utility model is to provide a self-expanding external wall screw hole sealing structure. By setting the sealing component and the self-expanding component, it solves the problem that rainwater or moisture can seep into the screw hole along the crack after the existing mortar has cured, and that the mortar has high density but poor sound absorption performance, making it difficult to block the transmission of external noise through the hole.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0006] This utility model relates to a self-expanding external wall screw hole sealing structure, comprising a screw hole, a sealing component disposed inside the screw hole, a self-expanding component disposed inside the screw hole, an external wall waterproof coating disposed on one side of the screw hole, the sealing component comprising a sealing rod disposed inside the screw hole, a first injection hole and a second injection hole formed on the surface of the sealing rod, an adjusting rod inserted inside the sealing rod, the self-expanding component comprising silicone-based self-expanding sealant filled inside the screw hole, closed-cell polyurethane foam filled inside the screw hole, self-expanding waterproof mortar filled inside the screw hole, and a first rubber head and a second rubber head fixedly connected to the surface of the sealing rod.

[0007] The present invention is further configured such that both the sealing rod and the adjusting rod are hollow, and the adjusting rod can be detachably inserted into the sealing rod.

[0008] The present invention is further configured such that the first injection hole is located on one side of the first rubber head, and the second injection hole is located between the first rubber head and the second rubber head.

[0009] The present invention is further configured such that a positioning plate is fixedly connected to the outer end of the adjusting rod located in the screw hole, and a pull ring is fixedly connected to the side of the positioning plate away from the adjusting rod.

[0010] The present invention is further configured such that both the first rubber head and the second rubber head are conical in shape, and the first rubber head and the second rubber head are fixedly connected to the surface of the sealing rod at intervals.

[0011] The present invention is further configured such that the first injection hole and the second injection hole are evenly opened on the surface of the sealing rod in a circular pattern, and are distributed at intervals along the axial direction of the sealing rod, and each type of injection hole is arranged at equal intervals in the circumferential direction.

[0012] The present invention has the following beneficial effects.

[0013] 1. This utility model utilizes a hollow sealing rod and a reusable adjusting rod to work together to inject silicone-based self-expanding sealant and closed-cell polyurethane foam in stages. After the adjusting rod is inserted into the sealing rod, the positioning plate contacts the exterior wall, triggering the injection of sealant through the first injection hole. The silicone-based self-expanding sealant expands and fills the micro-cracks in the inner wall of the hole, thus reducing noise. Subsequently, the adjusting rod is pulled out, and closed-cell polyurethane foam is injected through the second injection hole to further fill the gaps and provide waterproofing. This staged injection process avoids cross-contamination of materials. The elasticity of the silicone-based self-expanding sealant and the sound-absorbing properties of the closed-cell foam work synergistically to significantly improve waterproofing and noise reduction, blocking moisture penetration and sound wave transmission paths.

[0014] 2. This utility model utilizes a staged compression mechanism with a conical first rubber head and a second rubber head as the sealing rod advances. The first rubber head acts as a guide, radially compressing and conforming to the hole wall, guiding the sealing rod to precise positioning and forming an initial seal. The second rubber head, as the main sealing part, further expands under pressure, forming a tight annular sealing surface with the hole wall. The spaced design of the two rubber heads disperses compressive stress, combining the flexibility of the silicone-based self-expanding sealant with the curing support of closed-cell foam to form a dual physical and chemical seal. The highly elastic rubber material adapts to slight deformation of the hole or thermal expansion and contraction, avoiding cracking and failure, ensuring long-term structural stability and leak-proof redundancy, making it particularly suitable for building environments with dynamic loads or frequent temperature changes.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional diagram of a self-expanding external wall bolt hole sealing structure.

[0018] Figure 2 This is a cross-sectional view of the screw hole in a self-expanding external wall screw hole sealing structure.

[0019] Figure 3 This is a cross-sectional view of a sealing rod in a self-expanding external wall bolt hole sealing structure.

[0020] Figure 4 This is a cross-sectional view of the adjusting rod in a self-expanding external wall bolt hole sealing structure.

[0021] In the attached diagram: 1. Screw hole; 2. Sealing assembly; 201. Sealing rod; 202. First injection hole; 203. Second injection hole; 204. Adjusting rod; 3. Self-expanding assembly; 301. Silicone-based self-expanding sealant; 302. Closed-cell polyurethane foam; 303. Self-expanding waterproof mortar; 304. First rubber head; 305. Second rubber head; 4. Exterior wall waterproof coating; 5. Positioning plate; 6. Pull ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0024] Please see Figures 1-4This utility model is a self-expanding external wall screw hole sealing structure, including a screw hole 1, a sealing component 2 and a self-expanding component 3 inside the screw hole 1, and an external wall waterproof coating 4 on one side of the screw hole 1. The sealing component 2 includes a sealing rod 201 disposed inside the screw hole 1, and a first injection hole 202 and a second injection hole 203 opened on the surface of the sealing rod 201. The first injection hole 202 is located at the far end of the sealing rod 201 and is used to inject silicone-based self-expanding sealant 301 first; the second injection hole 203 is located at the far end of the sealing rod 201. The proximal end of the plugging rod 201 is used for post-injection of closed-cell polyurethane foam 302. An adjusting rod 204 is inserted inside the plugging rod 201. The self-expanding assembly 3 includes silicone-based self-expanding sealant 301 filled inside the screw hole 1, closed-cell polyurethane foam 302 filled inside the screw hole 1, self-expanding waterproof mortar 303 filled inside the screw hole 1, self-expanding waterproof mortar 303 filling the outer end of the screw hole 1 and flush with the surface of the outer wall, and a first rubber head 304 and a second rubber head 305 fixedly connected to the surface of the plugging rod 201.

[0025] Specifically, with the sealing component 2 in place, after the adjusting rod 204 is inserted into the sealing rod 201, it is pushed forward until the positioning plate 5 contacts the outer wall, ensuring that the sealing rod 201 accurately reaches the target depth. Silicone-based self-expanding sealant 301 is injected through the first injection hole 202, and the adjusting rod 204 seals the second injection hole 203 to prevent backflow. After completion, the adjusting rod 204 is pulled out, and closed-cell polyurethane foam 302 is injected through the second injection hole 203. The coordinated design of the hollow sealing rod 201 and the adjusting rod 204 achieves precise injection in stages, ensuring that the material fully fills the hole. With the self-expanding component 3 in place, the first rubber head 304 is pushed forward with the sealing rod 201 and first contacts the inner wall of the hole. The conical structure guides the sealing rod 201 to be centered and positioned, while radial compression forms a preliminary seal. The second rubber head 305 expands further under pressure during subsequent advancement, forming a tight annular sealing surface with the hole wall to disperse compressive stress. At the same time, the first rubber head 304 and the silicone-based self-expanding sealant 301 work together to form the first sealed chamber. The first rubber head 304, the closed-cell polyurethane foam 302, and the second rubber head 305 form the second sealed chamber. The segmented compression of the two rubber heads and the synergistic effect of the self-expansion of the materials form a physical + chemical double seal, which significantly improves noise reduction and leakage prevention capabilities. The flexibility of the highly elastic rubber material of the first rubber head 304 and the silicone-based self-expanding sealant 301 adapts to slight deformation of the hole or thermal expansion and contraction, effectively reducing noise transmission. The closed-cell polyurethane foam 302 blocks water penetration and reduces the thermal bridge effect, improving building energy efficiency. Specific Implementation Example 2

[0027] Please see Figures 1-4Based on the first specific embodiment, both the sealing rod 201 and the adjusting rod 204 are hollow designs. The adjusting rod 204 can be detachably inserted into the sealing rod 201. The first injection hole 202 is located on one side of the first rubber head 304, and the second injection hole 203 is located between the first rubber head 304 and the second rubber head 305. A positioning plate 5 is fixedly connected to the outer end of the adjusting rod 204 at the screw hole 1. A pull ring 6 is fixedly connected to the side of the positioning plate 5 away from the adjusting rod 204. The first rubber head 304 and the second rubber head 305 are both conical in shape. The first rubber head 304 and the second rubber head 305 are fixedly connected to the surface of the sealing rod 201 at intervals. The first injection hole 202 and the second injection hole 203 are evenly opened on the surface of the sealing rod 201 in a circular pattern and are distributed at intervals along the axial direction of the sealing rod 201. Each type of injection hole is arranged at equal intervals in the circumferential direction.

[0028] Specifically, the hollow-designed sealing rod 201 and adjusting rod 204 are used to inject silicone-based self-expanding sealant 301 and closed-cell polyurethane foam 302 into the screw hole 1. The reusable adjusting rod 204 seals the second injection hole 203 during the injection of silicone-based self-expanding sealant 301, preventing it from flowing out. This reusable adjusting rod reduces costs. The first injection hole 202 is used to inject... The silicone-based self-expanding sealant 301, through the second injection hole 203, is used to inject closed-cell polyurethane foam 302 into the screw hole 1. The positioning plate 5, once in contact with the outer wall, indicates that the adjusting rod 204 is inserted correctly, allowing for the injection of the silicone-based self-expanding sealant 301. The pull ring 6 is used to pull out the adjusting rod 204. The conical first rubber head 304 and second rubber head 305, as the sealing rod 201 is pushed into the screw hole 1, gradually contact the inner wall of the screw hole 1 and compress radially. The first rubber head 304, acting as a guide, first contacts the inner wall of the screw hole 1, guiding the sealing rod 201 to precise alignment through its conical structure. The second rubber head 305, acting as the main sealing part, further expands under pressure during subsequent advancement, forming a tight annular sealing surface with the inner wall of the screw hole 1. The spaced design of the two rubber heads disperses compressive stress, preventing excessive local deformation, while the dual-stage sealing structure enhances leak-proof redundancy. The high elasticity of the rubber material ensures that it recovers its deformation after compression, adapting to slight irregularities or dynamic displacement of the holes, thus achieving long-lasting waterproofing and structural stability. The placement of the first injection hole 202 and the second injection hole 203 ensures that the injection path of the silicone-based self-expanding sealant 301 and the closed-cell polyurethane foam 302 covers the entire inner wall area of ​​the screw hole 1. The evenly distributed circumferential design ensures balanced pressure diffusion during material injection, preventing local accumulation or voids, thereby forming a continuous, dense, noise-reducing, and waterproof sealing layer. Furthermore, the chamfered edges of the first injection hole 202 and the second injection hole 203 reduce material flow resistance, further optimizing filling efficiency and sealing effect.

[0029] The operation process of this embodiment is as follows: push the sealing rod 201 into the screw hole 1 and continue pushing until the sealing rod 201 is fully inserted into the screw hole 1. Insert the adjusting rod 204 into the inner cavity of the sealing rod 201. Stop pushing when the positioning plate 5 contacts the outer wall. At this time, an external device can be used to inject silicone-based self-expanding sealant 301 into the sealing rod 201. The silicone-based self-expanding sealant 301 flows into the screw hole 1 through the first injection hole 202. After self-expanding and solidifying, it cooperates with the first rubber head 304 to form the first sealed chamber, which plays a role in noise reduction.

[0030] After injecting the silicone-based self-expanding sealant 301, the adjusting rod 204 should be pulled outward immediately using the pull ring 6 to prevent the adjusting rod 204 from sticking to the sealing rod 201 when the silicone-based self-expanding sealant 301 expands. When the adjusting rod 204 is pulled out, the second injection hole 203 will be in a leaking state. At this time, closed-cell polyurethane foam 302 can be injected through external equipment. The closed-cell polyurethane foam 302 flows into the screw hole 1 through the second injection hole 203. After self-expansion, it forms a second sealed chamber with the first rubber head 304 and the second rubber head 305, which plays a role in preventing moisture penetration.

[0031] Finally, inject self-expanding waterproof mortar 303 into the screw hole 1 to seal the screw hole 1. It should be noted that after the self-expanding waterproof mortar 303 is injected, it needs to be leveled with the exterior wall. After the self-expanding waterproof mortar 303 solidifies, it forms a base seal. Then, apply the exterior wall waterproof coating 4 on the self-expanding waterproof mortar 303 and the exterior wall surface to enhance the overall waterproof performance.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A self-expanding external wall bolt hole sealing structure, comprising bolt holes (1), characterized in that: A sealing component (2) is provided inside the screw hole (1), a self-expanding component (3) is provided inside the screw hole (1), and an external wall waterproof coating (4) is provided on one side of the screw hole (1); The sealing assembly (2) includes a sealing rod (201) disposed inside the screw hole (1), a first injection hole (202) and a second injection hole (203) opened on the surface of the sealing rod (201), and an adjusting rod (204) inserted inside the sealing rod (201); The self-expanding component (3) includes a silicone-based self-expanding sealant (301) filled inside the screw hole (1), a closed-cell polyurethane foam (302) filled inside the screw hole (1), a self-expanding waterproof mortar (303) filled inside the screw hole (1), and a first rubber head (304) and a second rubber head (305) fixedly connected to the surface of the sealing rod (201).

2. The self-expanding external wall bolt hole sealing structure according to claim 1, characterized in that, Both the sealing rod (201) and the adjusting rod (204) are hollow designs, and the adjusting rod (204) can be detachably inserted into the sealing rod (201).

3. The self-expanding external wall bolt hole sealing structure according to claim 1, characterized in that, The first injection hole (202) is located on one side of the first rubber head (304), and the second injection hole (203) is located between the first rubber head (304) and the second rubber head (305).

4. The self-expanding external wall bolt hole sealing structure according to claim 1, characterized in that, The adjusting rod (204) is fixedly connected to a positioning plate (5) at the outer end of the screw hole (1), and a pull ring (6) is fixedly connected to the side of the positioning plate (5) away from the adjusting rod (204).

5. The self-expanding external wall bolt hole sealing structure according to claim 1, characterized in that, The first rubber head (304) and the second rubber head (305) are both conical in shape, and the first rubber head (304) and the second rubber head (305) are fixedly connected to the surface of the sealing rod (201) at intervals.

6. The self-expanding external wall bolt hole sealing structure according to claim 1, characterized in that, The first injection hole (202) and the second injection hole (203) are evenly distributed on the surface of the sealing rod (201) in a circular pattern, and are spaced apart along the axial direction of the sealing rod (201), with each type of injection hole arranged at equal intervals in the circumferential direction.

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