A wall screw hole sealing device

Abstract

This utility model relates to a wall tie rod hole sealing device, belonging to the field of building construction technology. It includes two coaxially arranged tie rods; a connecting rod installed between the two tie rods and detachably connected to them; and a self-sealing component fitted onto the connecting rod. The self-sealing component includes a shell, inside which is embedded a hollow sealing element. The hollow sealing element is sealed with a self-expanding cement foaming agent, and the space between the hollow sealing element and the connecting rod is filled with cement. During installation, the tie rods, connecting rod, and self-sealing component are quickly connected and fixed. After the wall concrete is poured and the formwork is removed, the tie rods, connecting rod, and shell are taken out. The internal self-expanding cement foaming agent reacts chemically with the filling cement, achieving sealing. This utility model is lightweight, simple to manufacture and use, suitable for various environments, and highly practical. Furthermore, this device is reusable, saving costs.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a wall bolt hole sealing device. Background Technology

[0002] In modern construction engineering, shear wall formwork is typically fixed using ordinary through-wall bolts. After the shear wall concrete is poured and reaches a certain strength, the through-wall bolts need to be removed, leaving pre-drilled holes in the wall for the bolts. Before plastering the wall, these bolt holes must be sealed to prevent water leakage. If the bolt holes are not sealed properly, subsequent wall leaks are highly likely, which not only affects the building's functionality but may also lead to a series of engineering quality problems, increase later maintenance costs, and in severe cases, even threaten the building's structural safety and lifespan.

[0003] Currently, in building construction, the common methods for sealing pre-drilled holes for bolts are grouting or filling with expanding foam. When using grouting, the limited space inside the bolt hole makes it difficult for the grout to completely fill all corners, easily creating gaps and resulting in an incomplete seal. Similarly, using expanding foam can lead to shrinkage during curing, making the filling effect less than expected and failing to ensure the bolt hole is completely filled, thus failing to effectively prevent wall leakage. Therefore, existing bolt hole sealing methods have significant shortcomings and cannot meet the quality requirements of building construction for bolt hole sealing. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a wall bolt hole sealing device to compensate for the defect that the bolt hole is not sealed tightly after the shear wall through bolt is removed, which easily leads to water leakage. With a wall bolt hole sealing device, the bolt hole can be fully filled after the tie rod, connecting bolt and shell are removed, effectively preventing water leakage on the wall surface and improving the construction quality of building projects.

[0005] In view of this, the present invention provides a wall bolt hole sealing device, comprising:

[0006] The two tie rods are arranged coaxially opposite each other.

[0007] A connecting screw is installed between the two tie screws and is detachably connected to the tie screws;

[0008] A self-sealing component is fitted onto the outside of the connecting screw; the self-sealing component includes a housing, inside which a hollow seal is embedded, the hollow seal is sealed with a self-expanding cement foaming agent, and cement is filled between the hollow seal and the connecting screw.

[0009] A wall bolt hole sealing device according to an embodiment of this utility model has at least the following technical effects: During installation, the tie rods, connecting rods, and self-compacting components are quickly connected and fixed to jointly complete the tie-fixing work of the shear wall formwork. When waiting for the wall concrete to be poured and the formwork to be removed, the tie rods, connecting rods, and outer shell are taken out. Through the friction between the hollow seal and the connecting rod and outer shell, the hollow seal breaks, causing the internal self-expanding cement foaming agent to react chemically with the filling cement, achieving the effect of self-compacting sealing of the bolt hole. This device is lightweight, simple to manufacture and use, suitable for multiple environments, and more practical. Furthermore, the tie rods, connecting rods, and outer shell can be reused, saving costs.

[0010] According to some embodiments of this utility model, the two ends of the connecting screw are respectively connected to the corresponding pull screws via water-stop rings.

[0011] According to some embodiments of this utility model, the inner circumferential surface of the pull rod near the self-sealing component is provided with an internal thread section, and the inner circumferential surface of the connecting screw is provided with an internal thread section; the outer ring of one end of the water-stop ring is provided with an external thread adapted to the internal thread section of the pull rod, and the outer ring of the other end is provided with an external thread adapted to the internal thread section of the outer shell; the water-stop ring forms a detachable connection with the pull rod and the outer shell through threaded engagement.

[0012] According to some embodiments of this utility model, the water-stop ring at one end of the connecting screw is integrally formed with the connecting screw and the corresponding pull screw, and the water-stop ring at one end of the connecting screw is screwed to the connecting screw.

[0013] According to some embodiments of the present invention, the water-stop ring is an annular flange structure, and the radial cross-section of the water-stop ring is an isosceles trapezoid.

[0014] According to some embodiments of this utility model, a barb is provided on the outer surface of the connecting screw at one end that is movably connected to the mating bolt, and its cross-sectional height is 1 / 6 to 1 / 5 of the cross-sectional height of the self-compacting component.

[0015] According to some embodiments of the present invention, the outer shell is a cylindrical structure with both ends through, the outer wall of the hollow seal is tightly fitted with the inner wall of the outer shell, the length of the hollow seal is not greater than the internal axial length of the outer shell; the hollow seal is an annular structure sealing film with a sealing volume for encapsulating self-expanding cement foaming agent; the inner wall of the hollow seal forms a cylindrical cavity for accommodating cement.

[0016] According to some embodiments of this utility model, the outer wall of the hollow seal is provided with a plurality of dot-shaped protrusions, the dot-shaped protrusions are in contact with the inner wall of the outer shell, the tensile strength of the sealing film is 15MPa-25MPa, the elongation at break of the sealing film is 200%-300%, and the sealing film is in a ruptured state when subjected to a frictional force of 5N-10N.

[0017] According to some embodiments of the present invention, the outer wall of the connecting screw is provided with reinforcing ribs extending axially, and the reinforcing ribs are evenly distributed along the circumference of the outer shell.

[0018] According to some embodiments of the present invention, the end of the pull screw away from the self-closing component is provided with a screw head, the screw head is arranged perpendicular to the axis of the pull screw and is fixedly connected to the pull screw.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this drawing 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 drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of a wall screw hole sealing device according to the present invention;

[0022] Figure 2 for Figure 1 Top view;

[0023] Figure 3 This is a schematic diagram showing the installation position of the wall bolt hole sealing device of this utility model inside the wall.

[0024] Explanation of icon numbers:

[0025] 100. Pull-out screw; 101. Screw head; 200. Connecting screw; 300. Self-sealing assembly; 400. Water-stop ring.

[0026] The purpose, features, and advantages of this accompanying drawing will be further explained in conjunction with the embodiments and with reference to the accompanying drawing. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments provided by this utility model without inventive effort are within the scope of protection of this utility model.

[0028] Obviously, the accompanying drawings described below are merely some examples or embodiments of this utility model. Those skilled in the art can apply this utility model to other similar scenarios without any creative effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this utility model, any changes to the design, manufacturing, or production methods based on the disclosed technical content are merely conventional technical means and should not be construed as insufficient disclosure of this utility model.

[0029] In existing construction projects, the sealing of bolt holes in shear walls mainly employs two methods: mortar injection or expanding foam filling. When using mortar injection, the bolt hole is typically cleaned first, removing debris and dust. Then, mortar is injected into the hole using a mortar injection tool, and the sealing is completed after the mortar hardens. For expanding foam filling, after cleaning the bolt hole, expanding foam is directly squeezed into it. The foam expands and hardens within the hole, acting as a filler. Both methods are relatively simple to operate, require low technical skills from construction workers, and can meet basic sealing needs to a certain extent. Furthermore, the materials are inexpensive and readily available, thus they are widely used in construction. However, when using mortar injection, due to the limited fluidity of the mortar, it is difficult to ensure that every corner of the bolt hole is fully filled during the injection process, especially for some long bolt holes with small diameters, which can easily create voids within the hole. Moreover, the mortar shrinks during the hardening process, further contributing to incomplete compaction within the hole and increasing the risk of leakage. While expanding foam can expand inside the hole, its adhesion to the concrete wall is poor. Over time, under the influence of external environmental factors (such as temperature changes or humidity fluctuations), the expanding foam is prone to detaching from the wall, forming a seepage channel. In addition, expanding foam has relatively poor durability. When exposed to the natural environment for a long time, its performance will gradually decline, making it unable to effectively seal the bolt holes for a long time and failing to guarantee the waterproofing effect of the building.

[0030] See Figures 1 to 3As shown, to solve the aforementioned problems, this utility model embodiment proposes a wall bolt hole sealing device, including a tie rod 100, a connecting rod 200, and a self-sealing component 300. Wherein,

[0031] Pull screw 100, two pull screws 100 are arranged coaxially opposite each other;

[0032] A connecting screw 200 is installed between two tie screws 100 and is detachably connected to the tie screws 100;

[0033] The self-sealing component 300 is fitted onto the outside of the connecting screw 200. The self-sealing component 300 includes a housing, inside which a hollow seal is embedded. The hollow seal is sealed with a self-expanding cement foaming agent, and cement is filled between the hollow seal and the connecting screw 200.

[0034] Specifically, this sealing device includes two tie rods 100 for inserting the self-compacting component 300 into the wall bolt hole. The tie rods 100 are coaxially arranged opposite each other to ensure that the two tie rods 100 maintain force balance and consistency when under force, avoiding instability of the sealing structure due to force displacement. A self-compacting component 300 is located between the two tie rods 100 for sealing the wall bolt hole. The self-compacting component 300 is clamped by the oppositely arranged tie rods 100, forming a stable clamping force, and at the same time, to a certain extent, assists the sealing material, preventing the self-compacting component 300 from shifting position during solidification or expansion.

[0035] The connecting screw 200 is installed between two tie rods 100 and is detachably connected to the tie rods 100; the connecting screw 200 and the tie rods 100 are arranged coaxially. The connecting screw 200 and the hollow sealant form a sealed space for holding cement. When the connecting screw 200 is disassembled, the self-sealing component 300 is left in the screw hole in the wall for sealing.

[0036] The self-sealing component 300 is disposed within the wall bolt hole for sealing the bolt hole. The self-sealing component 300 is fitted around the connecting bolt 200 and positioned between the two tie bolts 100. The self-sealing component 300 includes a shell, a self-expanding cement foaming agent, and filling cement. The shell fits tightly against the wall bolt hole, forming a preliminary sealing space with the inner wall of the bolt hole, and also protects the self-sealing component 300. A hollow seal is embedded inside the shell, made of polyethylene. The hollow seal is sealed with self-expanding cement foaming agent, and its inner cavity is filled with 42.5 MPa cement. When the hollow seal ruptures, the self-expanding cement foaming agent reacts chemically with the cement, rapidly expanding to form a tightly sealed and reliable sealing assembly, effectively preventing water or air from penetrating through the bolt hole, thus achieving sealing. The chemical reaction formula between the self-expanding cement foaming agent and cement is:

[0037] 3CaO•SiO2+nH2O→2CaO•SiO2•(n-1)H2O+Ca(OH)2

[0038] CaCO3 + 2H+ → Ca 2+ +CO2↑+H2O

[0039] In this embodiment, during installation, the tie rod 100, connecting rod 200, and self-compacting component 300 are quickly connected and fixed to jointly complete the tie-fixing work of the shear wall formwork. Several of these sealing devices can be installed in the wall. When the wall concrete pouring is complete and the formwork can be removed, the tie rod 100, connecting rod 200, and outer shell are taken out. Through friction between the hollow seal and the connecting rod 200 and outer shell, the hollow seal breaks, causing the internal self-expanding cement foaming agent to chemically react with the filling cement, achieving the effect of self-compacting and sealing the bolt holes. This device is lightweight, simple to manufacture and use, suitable for various environments, and highly practical. Furthermore, the tie rod 100, connecting rod 200, and outer shell can be reused, saving costs.

[0040] In some specific embodiments of this utility model, the two ends of the connecting screw 200 are respectively connected to the corresponding pull screw 100 through the water-stop ring 400.

[0041] In this embodiment, the connecting screw 200 is connected between two tie screws 100, and both ends of the connecting screw 200 are connected to the corresponding tie screws 100 via water-stop rings 400, forming a continuous structure of "tie screw 100 - water-stop ring 400 - connecting screw 200 - water-stop ring 400 - tie screw 100". Through the connection method of the water-stop rings 400, the force transmission path of the entire device is clearer and more efficient. When the tie screw 100 is subjected to external force, the force can be transmitted sequentially through the water-stop rings 400 to the connecting screw 200, and then through the water-stop rings 400 at the other end to the tie screw 100 on the other side. This makes the device as a whole uniformly stressed, effectively disperses local stress, reduces the load on a single connection point, and thus improves the structural reliability of the device during long-term use. Meanwhile, the water-stop ring 400 also serves as a crucial waterproofing node during the connection process. Once tightly connected to the connecting screw 200 and the tie rod 100, the water-stop ring 400 further enhances the sealing effect of the self-sealing assembly, preventing it from detaching or leaking out. Furthermore, the water-stop ring 400 also helps strengthen the bond between the device and the wall, reducing the risk of loosening of the sealing structure due to wall settlement or external vibrations.

[0042] In some specific embodiments of this utility model, the inner circumferential surface of the pull screw 100 near the self-sealing component 300 is provided with an internal thread section, and the inner circumferential surface of the connecting screw 200 is provided with an internal thread section; the outer ring of one end of the water-stop ring 400 is provided with an external thread that matches the internal thread section of the pull screw 100, and the outer ring of the other end is provided with an external thread that matches the internal thread section of the outer shell; the water-stop ring 400 forms a detachable connection with the pull screw 100 and the outer shell through threaded engagement.

[0043] In this embodiment, a water-stop ring 400 is positioned between the tie rod 100 and the connecting rod 200. Through threaded engagement, the water-stop ring 400 forms a detachable connection with both the tie rod 100 and the outer casing. This ensures both a strong connection and a degree of detachability, allowing for easy adjustment of the water-stop ring 400's position during installation to ensure precise fit against the walls or key sealing points of the bolt holes, enhancing sealing flexibility. First, one end of the water-stop ring 400 is tightened to the internal thread of the tie rod 100, and then the other end is screwed onto the internal thread of the connecting rod 200. The entire process requires no complex tools, is convenient, and significantly improves construction efficiency.

[0044] In some specific embodiments of this utility model, the water-stop ring 400 at one end of the connecting screw 200 is integrally formed with the connecting screw 200 and the corresponding tie rod 100, and the water-stop ring 400 at one end of the connecting screw 200 is screwed to the connecting screw 200. In this embodiment, this integrated design eliminates the connection gap between the two, significantly improving the integrity and stability of the structure. It allows for simultaneous load bearing under stress, preventing the overall sealing effect from being affected by loosening of the connection points. It also reduces the possibility of water or air seeping through the connection gaps. Furthermore, during disassembly, it facilitates the simultaneous removal of the connecting screw 200, tie rod 100, and water-stop ring 400 on one side, improving work efficiency.

[0045] In some specific embodiments of this utility model, the water-stop ring 400 is an annular flange structure, and the radial cross section of the water-stop ring 400 is an isosceles trapezoid.

[0046] In this embodiment, the annular flange structure creates an outwardly protruding portion in the radial direction of the water-stop ring 400. This portion allows for tight contact with the inner wall of the screw hole and the self-sealing component that contacts the water-stop ring 400. When the self-expanding cement foaming agent expands, it tightly compresses the annular flange of the water-stop ring 400. The flange structure can better withstand this compressive force, while increasing the bonding area between the self-expanding cement foaming agent and the cement. This makes the connection between the self-expanding cement foaming agent and the cement more robust, reducing the possibility of gaps caused by material shrinkage or vibration, thereby enhancing the sealing strength. Furthermore, when the radial cross-section of the water-stop ring 400 is an isosceles trapezoid, the pressure can be distributed over a larger area, improving the water-stop ring 400's anti-permeability. The upper and lower bases of the trapezoid contact different components or materials, and the wider side can provide more stable support, while the narrower side facilitates connection with the tie rod 100 or the connecting rod 200. During installation, the inclined waist can guide the sealing material to better fill the space around the water-stop ring 400, avoiding voids or air bubbles, further improving the sealing effect.

[0047] In some specific embodiments of this utility model, a barb is provided on the outer surface of the connecting screw 200 at the end that is movably connected to the mating bolt, and its cross-sectional height is 1 / 6 to 1 / 5 of the cross-sectional height of the self-compacting component 300.

[0048] In this embodiment, when the connecting screw 200 and the hollow seal slide against each other, the hollow seal is more likely to break due to friction. The barb design applies force to the hollow seal, making it easier to break and facilitating the outflow of the self-expanding cement foaming agent, which then reacts with the cement to seal the screw hole in the wall and improves the efficiency of the breaking process. The barb's cross-sectional height is set to 1 / 6 to 1 / 5 of the cross-sectional height of the self-compacting component 300, ensuring sufficient protrusion length to penetrate deep into the self-compacting component 300 and apply force, without the barb being too high and hindering the removal of the connecting screw 200.

[0049] In some specific embodiments of this utility model, the outer shell is a cylindrical structure with two through ends, the outer wall of the hollow seal is tightly fitted with the inner wall of the outer shell, and the length of the hollow seal is not greater than the internal axial length of the outer shell; the hollow seal is an annular structure sealing film with a sealing volume for encapsulating self-expanding cement foaming agent; the inner wall of the hollow seal forms a cylindrical cavity for accommodating cement.

[0050] In this embodiment, the outer shell is a cylindrical structure with two through ends, which contact the water-stop ring 400 to form a space for placing the hollow seal and simultaneously protect the hollow seal. The length of the hollow seal is no greater than the internal axial length of the outer shell. A certain amount of space is reserved within the outer shell for the hollow seal, ensuring sufficient expansion margin when the self-expanding cement foaming agent expands. This prevents the expansion effect from being affected by the outer shell's restriction, ensuring that the self-expanding cement foaming agent fully fills the gaps in the screw hole after reacting with the cement. The hollow seal is an annular sealing membrane with a sealing volume for encapsulating the self-expanding cement foaming agent. The annular structure is adapted to the shape of the outer shell and the screw hole, allowing the self-expanding cement foaming agent to be evenly distributed between the hollow seal and the outer shell. The sealing membrane firmly encapsulates the self-expanding cement foaming agent, preventing premature contact with air or moisture and ensuring accurate expansion when needed. The inner wall of the hollow seal forms a cylindrical cavity to accommodate the cement. This cylindrical cavity facilitates the filling and solidification of the cement, allowing it to form a regular, solid columnar structure and enhancing the overall strength of the sealing structure. As the cement solidifies and the self-expanding cement foaming agent expands, the two work synergistically. The cement provides solid structural support, while the foaming agent fills all gaps, together forming a tightly sealed and reliable sealing system.

[0051] In some specific embodiments of this utility model, the outer wall of the hollow seal is provided with a number of dot-shaped protrusions, which are in contact with the inner wall of the outer shell. The tensile strength of the sealing film is 15MPa-25MPa, the elongation at break of the sealing film is 200%-300%, and the sealing film is in a ruptured state when subjected to a frictional force of 5N-10N.

[0052] In this embodiment, the outer wall of the hollow seal has several dot-shaped protrusions. These protrusions contact the inner wall of the outer shell, creating multiple dispersed contact points rather than a completely tight fit. This ensures stable relative positions while providing small channels and spaces for the expansion of the self-expanding cement foaming agent. When the self-expanding cement foaming agent begins to expand, it spreads evenly along the gaps between the protrusions, ensuring that it fully fills every space between the hollow seal and the wall, preventing unfilled areas caused by complete adhesion and further improving the sealing effect. Furthermore, the protrusions increase the friction between the hollow seal and the outer shell, facilitating the rupture of the sealing film when the outer shell moves. The tensile strength of the sealing film is 15MPa-25MPa, ensuring that it can withstand external pressure and impact forces during normal transportation and installation without tearing, effectively protecting the internal self-expanding cement foaming agent. Meanwhile, when the self-expanding cement foaming agent expands, the sealing film needs to have a certain degree of extensibility to adapt to the change in volume. The 200%-300% elongation at break just meets this requirement. It can gradually stretch as the foaming agent expands without breaking prematurely, ensuring that the foaming agent has enough time and space to expand fully until it fills all the preset gaps. Only then will the sealing film break under the continuous action of the expansion force, allowing the foaming agent to tightly bond with the surrounding sealing material and the inner wall of the screw hole. The sealing membrane ruptures under a frictional force of 5N-10N. During the installation of the hollow seal, friction with the inner wall of the outer shell or other components is inevitable. Small frictional forces (less than 5N) will not cause the sealing membrane to rupture, ensuring the safety of the self-expanding cement foaming agent during installation. However, when the device is installed and the self-expanding cement foaming agent begins to function, or during later use when various factors generate frictional forces (reaching 5N-10N), the sealing membrane ruptures. This allows the foaming agent to promptly contact the external environment and expand, ensuring the timeliness and effectiveness of the sealing process. The synergistic effect of these performance parameters allows the hollow seal to both protect the self-expanding cement foaming agent from damage in the early stages and release the foaming agent at the appropriate time, fully utilizing its sealing function and providing strong assurance for the reliability of the entire sealing device.

[0053] In some specific embodiments of this utility model, the outer wall of the connecting screw 200 is provided with reinforcing ribs extending axially, and the reinforcing ribs are evenly distributed along the circumference of the outer shell.

[0054] In this embodiment, axially extending reinforcing ribs are provided on the outer wall of the connecting screw 200, and the reinforcing ribs are evenly distributed along the circumference of the outer shell. These reinforcing ribs are not simply protruding structures; their cross-sectional shape can be designed as triangular or trapezoidal, which can further improve the structural strength of the connecting screw 200, making it less prone to deformation under pressure. The axial extension design can be consistent with the length direction of the connecting screw 200. When the connecting screw 200 is subjected to axial tension or compression, the reinforcing ribs can directly participate in the force transmission, evenly distributing the force across the entire length of the connecting screw 200, thus preventing excessive local stress and damage to the connecting screw 200.

[0055] In some specific embodiments of this utility model, a screw head 101 is provided at the end of the pull screw 100 away from the self-closing component 300. The screw head 101 is arranged perpendicular to the axis of the pull screw 100 and is fixedly connected to the pull screw 100.

[0056] In this embodiment, for the reusable tie rod 100, the threaded heads 101 at both ends of the tie rod 100 serve to protect the ends of the tie rod 100. During transportation, storage, and construction, the threaded heads 101 reduce direct collisions and friction between the threads of the tie rod 100 and other objects, lowering the probability of damage to the tie rod 100 and extending its service life. Simultaneously, the presence of the threaded heads 101 facilitates the recycling and organization of the tie rod 100, making it easier for construction personnel to identify and operate it.

[0057] It should be noted that this utility model is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and function as the technical concept within the scope of this utility model are included within the technical scope of this utility model. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, are also included within the scope of this utility model without departing from the spirit of this utility model.

Claims

1. A wall bolt hole sealing device, characterized in that, include: Pull screws (100), the two pull screws (100) are arranged coaxially opposite each other; A connecting screw (200) is installed between the two tie screws (100) and is detachably connected to the tie screws (100); A self-sealing component (300) is fitted onto the outside of the connecting screw (200); the self-sealing component (300) includes a housing, a hollow seal is embedded inside the housing, the hollow seal is sealed with a self-expanding cement foaming agent, and cement is filled between the hollow seal and the connecting screw (200).

2. The wall bolt hole sealing device according to claim 1, characterized in that, The two ends of the connecting screw (200) are respectively connected to the corresponding pull screw (100) via water-stop rings (400).

3. The wall bolt hole sealing device according to claim 2, characterized in that, The inner circumferential surface of the pull rod (100) near the self-sealing component (300) is provided with an internal thread section, and the inner circumferential surface of the connecting rod (200) is provided with an internal thread section; the outer ring of one end of the water-stop ring (400) is provided with an external thread that matches the internal thread section of the pull rod (100), and the outer ring of the other end is provided with an external thread that matches the internal thread section of the outer shell; the water-stop ring (400) forms a detachable connection with the pull rod (100) and the outer shell through threaded engagement.

4. A wall bolt hole sealing device according to claim 2, characterized in that, The water-stop ring (400) at one end of the connecting screw (200) is integrally formed with the connecting screw (200) and the corresponding pull screw (100), and the water-stop ring (400) at one end of the connecting screw (200) is screwed to the connecting screw (200).

5. A wall bolt hole sealing device according to any one of claims 3 or 4, characterized in that, The water-stop ring (400) has an annular flange structure, and the radial cross section of the water-stop ring (400) is an isosceles trapezoid.

6. The wall bolt hole sealing device according to claim 1, characterized in that, A barb is provided at one end of the connecting screw (200) that is movably connected to the mating bolt, and its cross-sectional height is 1 / 6 to 1 / 5 of the cross-sectional height of the self-compacting component (300).

7. A wall bolt hole sealing device according to claim 1, characterized in that, The outer shell is a cylindrical structure with two through ends. The outer wall of the hollow seal is tightly fitted with the inner wall of the outer shell. The length of the hollow seal is not greater than the internal axial length of the outer shell. The hollow seal is an annular sealing membrane with a sealing volume for encapsulating self-expanding cement foaming agent. The inner wall of the hollow seal forms a cylindrical cavity for accommodating cement.

8. A wall bolt hole sealing device according to claim 7, characterized in that, The outer wall of the hollow seal is provided with several dot-shaped protrusions, which are in contact with the inner wall of the outer shell. The tensile strength of the sealing film is 15MPa-25MPa, the elongation at break of the sealing film is 200%-300%, and the sealing film is in a ruptured state when subjected to a frictional force of 5N-10N.

9. A wall bolt hole sealing device according to claim 7, characterized in that, The outer wall of the connecting screw (200) is provided with reinforcing ribs extending axially, and the reinforcing ribs are evenly distributed along the circumference of the outer shell.

10. A wall bolt hole sealing device according to any one of claims 1 to 9, characterized in that, The pull rod (100) has a screw head (101) at the end away from the self-closing component (300). The screw head (101) is arranged perpendicular to the axis of the pull rod (100) and is fixedly connected to the pull rod (100).

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