An integrated exterior wall self - contained waterproof wall - penetrating casing and its installation method

Abstract

The present invention relates to the technical field of exterior wall anti-leakage construction, and specifically relates to an integrated exterior wall self-waterproof through-wall casing and its installation method, including: a pre-embedded through-wall casing, a tearing flange is arranged on the inner side wall of the elastic rubber layer, and a waterproof sealant is coated on the inner side wall of the elastic rubber layer; both ends of the sealing film are turned outwards to form a covering ring, and the covering ring covers the outer side of the end of the pre-embedded through-wall casing; the middle part of the protective inner cylinder is frustum-shaped and fits with the inner side wall of the sealing film; the beneficial effect is that by bonding an elastic rubber layer on the inner side wall of the pre-embedded through-wall casing, when the formal pipeline passes through the inner cavity of the pre-embedded through-wall casing for installation, the outer wall of the formal pipeline squeezes the tearing flange to cause the sealing film to rupture, and the waterproof sealant on the inner side wall of the elastic rubber layer flows out and fills the gap between the inner wall of the elastic rubber layer and the outer wall of the formal pipeline, thereby effectively preventing the retention of air and improving the waterproof effect.

Description

Technical Field

[0001] The present invention relates to the technical field of exterior wall anti-leakage construction, and specifically relates to an integrated exterior wall self-waterproof through-wall casing and an installation method thereof. Background Art

[0002] Exterior wall leakage is a common quality problem faced during the building construction stage.

[0003] Currently, in the waterproof construction process of exterior wall through-wall casings, generally, a through-wall casing with a self-sealing ring is embedded for the external waterproofing of the later formal pipeline. When installing the pipeline, sealing pastes such as asphalt hemp yarn or waterproof grease are filled between the through-wall casing and the formal pipeline for the internal waterproofing of the casing.

[0004] In the prior art, after filling the waterproof material in the gap between the through-wall casing and the formal pipeline, most of the waterproof material stays at the open end of the gap, and there will be a certain amount of air remaining in the middle of the gap. Under the action of thermal expansion, these air is likely to squeeze out the waterproof materials at both ends, thus seriously affecting the waterproof effect. Therefore, the present invention proposes an integrated exterior wall self-waterproof through-wall casing and an installation method thereof to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated exterior wall self-waterproof through-wall casing and an installation method thereof to solve the problem that the air remaining in the gap between the through-wall casing and the formal pipeline affects the waterproof effect as mentioned in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An integrated exterior wall self-waterproof through-wall casing, comprising:

[0007] An embedded through-wall casing, an elastic rubber layer is adhesively bonded to the inner side wall of the embedded through-wall casing. The inner side wall of the elastic rubber layer is in a trumpet shape, a tearing flange is arranged on the inner side wall of the elastic rubber layer, and a waterproof sealant is coated on the inner side wall of the elastic rubber layer;

[0008] A sealing film, the sealing film covers the inner side wall of the elastic rubber layer, both ends of the sealing film are folded outwards to form a covering ring, and the covering ring covers the outside of the end of the embedded through-wall casing; and

[0009] A protective inner cylinder, the middle part of the protective inner cylinder is in a frustum shape and fits with the inner side wall of the sealing film.

[0010] Preferably, a plurality of tearing flanges are arranged, and the plurality of tearing flanges are evenly distributed along the axial direction of the embedded through-wall casing, and the diameters of the plurality of tearing flanges increase in sequence.

[0011] Preferably, the surface of the inner protective cylinder is coated with an anti-sticking coating. The large-end of the inner protective cylinder is fixedly connected with an annular baffle, and the annular baffle fits the end face of the embedded wall-piercing sleeve.

[0012] Preferably, an annular magnet is fixedly embedded on the side of the annular baffle. A cross-shaped connecting frame is arranged in the inner cavity of the annular baffle, and the end of the cross-shaped connecting frame is fixedly connected with the inner wall of the end of the inner protective cylinder.

[0013] Preferably, a water-stop steel plate is fixedly connected to the outer side wall of the embedded wall-piercing sleeve. The water-stop steel plate is set as a regular polygon, and a circular groove is formed by inward depression on one side of the water-stop steel plate.

[0014] Preferably, an expansion water-stop strip is bonded to the inner side wall of the circular groove, and a sealing fillet is arranged at the connection between the bottom of the circular groove and the embedded wall-piercing sleeve.

[0015] Preferably, a plurality of deformation notches are arranged in an annular array in the middle of the tearing flange, and the cross-section of the tearing flange is wedge-shaped.

[0016] Preferably, annular protrusions are arranged on the inner walls at both ends of the elastic rubber layer, annular grooves are formed on the outer walls at both ends of the inner protective cylinder, and the annular protrusions are located in and adapted to the inner cavities of the annular grooves.

[0017] Preferably, annular pressing grooves are formed at both ends of the outer side wall of the embedded wall-piercing sleeve. The covering ring covers the outside of the annular pressing grooves. An elastic rubber ring is arranged in the inner cavity of the annular pressing grooves, and the elastic rubber ring presses on the surface of the covering ring.

[0018] An installation method of the integrated exterior wall self-waterproof wall-piercing sleeve according to the above, specifically includes the following steps:

[0019] Step 1: Coat a waterproof sealant on the inner side wall of the elastic rubber layer to ensure that the waterproof sealant adheres between a plurality of tearing flanges. Then, cover the inner side wall of the elastic rubber layer with a sealing film, and turn the end of the sealing film outward to cover the outside of the end of the embedded wall-piercing sleeve. Press an elastic rubber ring in the inner cavity of the annular pressing groove to press the covering ring to prevent the waterproof sealant from being contaminated;

[0020] Step 2: Insert the small - end of the protective inner cylinder into the inner cavity of the elastic rubber layer from one end of the embedded wall - penetrating sleeve until the surface of the protective inner cylinder fits against the sealing film. At this time, the annular baffle just abuts against the end face of the embedded wall - penetrating sleeve, and the surface of the protective inner cylinder can support the sealing film, ensuring that the sealing film will not cause the waterproof sealant coated on the inner side wall of the elastic rubber layer to peel off due to deformation. Moreover, the annular magnet provided on the side of the annular baffle can generate magnetic attraction with the embedded wall - penetrating sleeve to prevent the protective inner cylinder from separating from the inner cavity of the embedded wall - penetrating sleeve;

[0021] Step 3: Install the embedded wall - penetrating sleeve in the concrete casting formwork and fix it. After the concrete is poured and solidified to form a wall, extract the protective inner cylinder from the inner cavity of the embedded wall - penetrating sleeve, and then insert the formal pipeline adapted to the embedded wall - penetrating sleeve into the inner cavity of the embedded wall - penetrating sleeve. Since the inner side wall of the elastic rubber layer is in a flared shape, the outer side wall of the formal pipeline will be squeezed by the elastic rubber layer. Due to the existence of the tearing flange, the sealing film will be torn by the friction between the formal pipeline and the tearing flange. Therefore, the waterproof sealant coated on the inner wall of the elastic rubber layer can adhere to the outer side wall of the formal pipeline and gradually solidify after contacting the water molecules in the air to fill the gap between the embedded wall - penetrating sleeve and the formal pipeline, thereby improving the waterproof effect.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] In the present invention, an elastic rubber layer is adhesively bonded to the inner side wall of the embedded wall - penetrating sleeve. The inner side wall of the elastic rubber layer is set to be flared. A tearing flange is fixedly connected to the inner side wall of the elastic rubber layer. A waterproof sealant is coated on the inner side wall of the elastic rubber layer. A sealing film covers the inner side wall of the elastic rubber layer. When the formal pipeline is installed through the inner cavity of the embedded wall - penetrating sleeve, the outer wall of the formal pipeline squeezes the tearing flange, causing the sealing film to rupture. The waterproof sealant on the inner side wall of the elastic rubber layer flows out and fills the gap between the inner wall of the elastic rubber layer and the outer wall of the formal pipeline, thereby effectively preventing the retention of air and improving the waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three - dimensional schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is a semi - sectional schematic diagram of the overall structure of the present invention;

[0026] Figure 3 is a semi - sectional schematic diagram of the structure of the embedded wall - penetrating sleeve of the present invention;

[0027] Figure 4 is a three - dimensional schematic diagram of the structure of the protective inner cylinder of the present invention;

[0028] Figure 5Schematic half-section view of the sealed film structure of the present invention.

[0029] In the figure: 1. Embedded wall-piercing casing; 2. Elastic rubber layer; 3. Tearing flange; 4. Sealing film; 5. Wrapping ring; 6. Protective inner cylinder; 7. Anti-sticking coating; 8. Water-stop steel plate; 9. Circular groove; 91. Sealing fillet; 10. Expansive water-stop strip; 11. Deformation notch; 12. Annular protrusion; 13. Annular groove; 14. Annular baffle; 15. Annular magnet; 16. Cross connecting frame; 17. Annular pressing groove; 18. Elastic rubber ring. Specific embodiments

[0030] In order to clearly and completely describe the objectives, technical solutions of the present invention and make the advantages more clearly understood, the following further elaborates on the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by referring to examples. In the following description, many specific details are set forth to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures are not described in detail to avoid unnecessarily obscuring these embodiments. Additionally, all embodiments can be used in combination with each other.

[0034] Please refer to Figures 1 to 5 , the present invention provides a technical solution:

[0035] Embodiment 1

[0036] An integrated exterior wall self - waterproof through - wall casing, comprising: a pre - embedded through - wall casing 1, a sealing film 4, and a protective inner cylinder 6.

[0037] Specifically, an elastic rubber layer 2 is adhesively bonded to the inner side wall of the pre - embedded through - wall casing 1. The inner side wall of the elastic rubber layer 2 is in a trumpet shape. When the elastic rubber layer 2 is squeezed, it can undergo elastic deformation. A tearing flange 3 is provided on the inner side wall of the elastic rubber layer 2. A waterproof sealant is coated on the inner side wall of the elastic rubber layer 2. The waterproof sealant is a gel - like transparent silicone potting compound, which cures rapidly by contacting water molecules and seals.

[0038] Secondly, the sealing film 4 covers the inner side wall of the elastic rubber layer 2. Both ends of the sealing film 4 are folded outwards to form a covering ring 5. The covering ring 5 covers the outside of the end of the pre - embedded through - wall casing 1. The sealing film 4 is used to support the waterproof sealant, preventing the waterproof sealant from falling off the inner side wall of the elastic rubber layer 2 and at the same time preventing the waterproof sealant from contacting water molecules in the air and causing curing.

[0039] Furthermore, the middle part of the protective inner cylinder 6 is frustum - shaped and fits the inner side wall of the sealing film 4. The protective inner cylinder 6 is used to support the sealing film 4 to prevent the sealing film 4 from deforming. That is to say, the waterproof sealant can fill the gap between the pre - embedded through - wall casing 1 and the protective inner cylinder 6 and remain in a gel state without solidifying. After the protective inner cylinder 6 is withdrawn from the inner cavity of the pre - embedded through - wall casing 1, a formal pipeline is inserted into the inner cavity of the pre - embedded through - wall casing 1. The formal pipeline squeezes the inner side wall of the elastic rubber layer 2 and has frictional extrusion with the tearing flange 3. At this time, the sealing film 4 is torn, and the waterproof sealant can fill the gap between the inner side wall of the pre - embedded through - wall casing 1 and the formal pipeline. And the waterproof sealant can gradually cure when it contacts the moisture in the air, thereby improving the sealing effect between the pre - embedded through - wall casing 1 and the formal pipeline.

[0040] Embodiment 2

[0041] On the basis of the first embodiment, in order to enable the waterproof sealant to be more evenly filled between the inner side wall of the embedded through-wall casing 1 and the outer side wall of the formal pipeline, the present application is provided with a plurality of tearing flanges 3. The plurality of tearing flanges 3 are evenly distributed along the axial direction of the embedded through-wall casing 1, and the diameters of the plurality of tearing flanges 3 increase in sequence, so as to ensure that the waterproof sealant can tightly adhere to the surface of the elastic rubber layer 2 and will not flow easily. At the same time, the arrangement of the plurality of tearing flanges 3 can quickly tear the sealing film 4 and enable the waterproof sealant to be more evenly filled between the inner side wall of the embedded through-wall casing 1 and the outer side wall of the formal pipeline.

[0042] The third embodiment

[0043] On the basis of the second embodiment, in order to prevent the protective inner cylinder 6 from tearing the sealing film 4, the present application also has an anti-adhesive coating 7 coated on the surface of the protective inner cylinder 6 to avoid the bonding between the sealing film 4 and the surface of the protective inner cylinder 6. An annular baffle 14 is fixedly connected to the large end of the protective inner cylinder 6. The annular baffle 14 fits the end face of the embedded through-wall casing 1. The annular baffle 14 limits the movement of the protective inner cylinder 6 in the inner cavity of the embedded through-wall casing 1 to avoid excessive movement of the protective inner cylinder 6 and resulting in extrusion between the protective inner cylinder 6 and the tearing flange 3, thereby avoiding the sealing film 4 being torn by the protective inner cylinder 6.

[0044] In addition, an annular magnet 15 is fixedly inlaid on the side surface of the annular baffle 14. A magnetic suction force is generated between the annular magnet 15 and the end face of the embedded through-wall casing 1 to avoid the easy separation between the protective inner cylinder 6 and the embedded through-wall casing 1. A cross-shaped connecting frame 16 is arranged in the inner cavity of the annular baffle 14. The end of the cross-shaped connecting frame 16 is fixedly connected to the inner wall of the end of the protective inner cylinder 6 to facilitate the extraction of the protective inner cylinder 6 from the inner cavity of the embedded through-wall casing 1.

[0045] The fourth embodiment

[0046] On the basis of the third embodiment, in order to increase the sealing performance between the water stop steel plate 8 and the concrete wall, the present application also has a water stop steel plate 8 fixedly connected to the outer side wall of the embedded through-wall casing 1. The water stop steel plate 8 is fixedly embedded in the wall with the pouring of the concrete wall. The water stop steel plate 8 is set as a regular polygon to avoid rotation and resulting in loosening and water seepage between the embedded through-wall casing 1 and the concrete wall. One side surface of the water stop steel plate 8 is recessed inward to form a circular groove 9. The circular groove 9 faces the water-facing side and is used to increase the seepage path and reduce the water flow penetration pressure. An expansion water stop strip 10 is bonded to the inner side wall of the circular groove 9 to improve the sealing effect between the water stop steel plate 8 and the concrete wall. A sealing fillet 91 is arranged at the connection between the bottom of the circular groove 9 and the embedded through-wall casing 1 to reduce the possibility of the water stop steel plate 8 breaking.

[0047] The fifth embodiment

[0048] On the basis of the fourth embodiment, in order to ensure that the tearing flange 3 can tear the sealing film 4, the present application further has a plurality of deformation cuts 11 arranged in an annular array in the middle of the tearing flange 3 to ensure that the tearing flange 3 can move with the deformation of the elastic rubber layer 2. The cross-section of the tearing flange 3 is wedge-shaped. Therefore, when the tearing flange 3 contacts and presses the sealing film 4, the sealing film 4 can be torn.

[0049] Embodiment Six

[0050] On the basis of the fifth embodiment, in order to further prevent the protective inner cylinder 6 from sliding in the inner cavity of the embedded wall-piercing casing 1, the present application further has annular protrusions 12 provided on the inner walls at both ends of the elastic rubber layer 2, and annular grooves 13 are provided on the outer walls at both ends of the protective inner cylinder 6. The annular protrusions 12 are located in the inner cavity of the annular grooves 13 and are adapted to each other. The cooperation of the annular protrusions 12 and the annular grooves 13 can further position the protective inner cylinder 6 to prevent the protective inner cylinder 6 from sliding in the inner cavity of the embedded wall-piercing casing 1.

[0051] Embodiment Seven

[0052] On the basis of the sixth embodiment, in order to ensure that the sealing film 4 remains taut, the present application further has annular pressing grooves 17 provided at both ends of the outer side wall of the embedded wall-piercing casing 1. The covering ring 5 covers the outside of the annular pressing grooves 17. An elastic rubber ring 18 is provided in the inner cavity of the annular pressing grooves 17. The elastic rubber ring 18 presses on the surface of the covering ring 5. The elastic rubber ring 18 can undergo elastic deformation. When the elastic rubber ring 18 is stuck in the inner cavity of the annular pressing grooves 17, the covering ring 5 can be tightened to ensure that the sealing film 4 remains taut.

[0053] An installation method of the integrated exterior wall self - waterproof wall - piercing casing according to the above, specifically includes the following steps:

[0054] Step 1: Coat a waterproof sealant on the inner side wall of the elastic rubber layer 2 to ensure that the waterproof sealant adheres between the plurality of tearing flanges 3. Then use the sealing film 4 to cover the inner side wall of the elastic rubber layer 2, and turn the end of the sealing film 4 outwards to cover the outside of the end of the embedded wall - piercing casing 1. Use the elastic rubber ring 18 to press in the inner cavity of the annular pressing groove 17 to press the covering ring 5 to avoid contamination of the waterproof sealant;

[0055] Step 2: Insert the small end of the protective inner cylinder 6 into the inner cavity of the embedded through-wall sleeve 1 from one end until the surface of the protective inner cylinder 6 fits against the sealing film 4. At this time, the annular baffle 14 just abuts against the end face of the embedded through-wall sleeve 1, and the surface of the protective inner cylinder 6 can support the sealing film 4 to ensure that the sealing film 4 will not cause the waterproof sealant coated on the inner side wall of the elastic rubber layer 2 to come off due to deformation. Moreover, the annular magnet 15 provided on the side of the annular baffle 14 can generate a magnetic attraction force with the embedded through-wall sleeve 1 to prevent the protective inner cylinder 6 from separating from the inner cavity of the embedded through-wall sleeve 1;

[0056] Step 3: Install the embedded through-wall sleeve 1 in the concrete pouring formwork and fix it. After the concrete is poured and solidified to form a wall, pull out the protective inner cylinder 6 from the inner cavity of the embedded through-wall sleeve 1, and then insert the formal pipe adapted to the embedded through-wall sleeve 1 into the inner cavity of the embedded through-wall sleeve 1. Since the inner side wall of the elastic rubber layer 2 is trumpet-shaped, the outer side wall of the formal pipe will be squeezed by the elastic rubber layer 2. Due to the existence of the tearing flange 3, the sealing film 4 will be torn by the friction between the formal pipe and the tearing flange 3. Therefore, the waterproof sealant coated on the inner wall of the elastic rubber layer 2 can adhere to the outer side wall of the formal pipe and gradually cure after contacting the water molecules in the air to fill the gap between the embedded through-wall sleeve 1 and the formal pipe, thereby improving the waterproof effect.

[0057] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated exterior wall self - contained waterproof wall - penetrating sleeve, characterized in that: It includes: A pre - embedded wall - penetrating sleeve (1), an elastic rubber layer (2) is bonded to the inner side wall of the pre - embedded wall - penetrating sleeve (1), the inner side wall of the elastic rubber layer (2) is in a flared shape, a tearing flange (3) is arranged on the inner side wall of the elastic rubber layer (2), and a waterproof sealant is coated on the inner side wall of the elastic rubber layer (2); A sealing film (4), the sealing film (4) covers the inner side wall of the elastic rubber layer (2), both ends of the sealing film (4) are folded outwards to form a covering ring (5), and the covering ring (5) covers the outer side of the end of the pre - embedded wall - penetrating sleeve (1); and A protective inner cylinder (6), the middle part of the protective inner cylinder (6) is frustum - shaped and fits the inner side wall of the sealing film (4); There are multiple tearing flanges (3), and the multiple tearing flanges (3) are equally spaced along the axial direction of the pre - embedded wall - penetrating sleeve (1), and the diameters of the multiple tearing flanges (3) increase in sequence; An anti - sticking coating (7) is coated on the surface of the protective inner cylinder (6), a circular baffle (14) is fixedly connected to the large - end of the protective inner cylinder (6), and the circular baffle (14) fits the end face of the pre - embedded wall - penetrating sleeve (1).

2. The integrated exterior wall self - contained waterproof wall - penetrating sleeve according to claim 1, characterized in that: A circular magnet (15) is fixedly inlaid on the side surface of the circular baffle (14), a cross - shaped connecting frame (16) is arranged in the inner cavity of the circular baffle (14), and the end of the cross - shaped connecting frame (16) is fixedly connected to the inner wall of the end of the protective inner cylinder (6).

3. The integrated exterior wall self - contained waterproof wall - penetrating sleeve according to claim 2, characterized in that: A water - stop steel plate (8) is fixedly connected to the outer side wall of the pre - embedded wall - penetrating sleeve (1), the water - stop steel plate (8) is set as a regular polygon, and a circular groove (9) is formed by inward depression on one side surface of the water - stop steel plate (8).

4. The integrated exterior wall self - contained waterproof wall - penetrating sleeve according to claim 3, characterized in that: An expansion water - stop strip (10) is bonded to the inner side wall of the circular groove (9), and a sealing fillet (91) is arranged at the connection between the bottom of the circular groove (9) and the pre - embedded wall - penetrating sleeve (1).

5. The integrated exterior wall self - contained waterproof wall - penetrating sleeve according to claim 4, characterized in that: A plurality of deformation cuts (11) distributed in a circular array are formed in the middle of the tearing flange (3), and the cross - section of the tearing flange (3) is wedge - shaped.

6. The integrated exterior wall self - contained waterproof wall - penetrating sleeve according to claim 5, characterized in that: Circular protrusions (12) are arranged on the inner walls at both ends of the elastic rubber layer (2), circular grooves (13) are formed on the outer walls at both ends of the protective inner cylinder (6), and the circular protrusions (12) are located in the inner cavity of the circular grooves (13) and are adapted to them.

7. The integrated exterior wall self - contained waterproof wall - penetrating sleeve according to claim 6, characterized in that: Both ends of the outer side wall of the embedded wall-piercing casing (1) are provided with annular pressing grooves (17). The covering ring (5) covers the outside of the annular pressing grooves (17). An elastic rubber ring (18) is arranged in the inner cavity of the annular pressing grooves (17). The elastic rubber ring (18) presses on the surface of the covering ring (5).

8. An installation method of the integrated exterior wall waterproof wall-piercing casing according to claim 7, characterized in that: specifically includes the following steps: Step 1: Coat a waterproof sealant on the inner side wall of the elastic rubber layer (2) to ensure that the waterproof sealant adheres between multiple tearing flanges (3). Then use a sealing film (4) to cover the inner side wall of the elastic rubber layer (2), and turn the end of the sealing film (4) outwards to cover the outside of the end of the embedded wall-piercing casing (1). Use the elastic rubber ring (18) to press in the inner cavity of the annular pressing groove (17) to press the covering ring (5) to prevent the waterproof sealant from being contaminated; Step 2: Insert the small end of the protective inner cylinder (6) into the inner cavity of the elastic rubber layer (2) from one end of the embedded wall-piercing casing (1) until the surface of the protective inner cylinder (6) fits the sealing film (4). At this time, the annular baffle (14) just abuts against the end face of the embedded wall-piercing casing (1), and the surface of the protective inner cylinder (6) can support the sealing film (4) to ensure that the sealing film (4) will not cause the waterproof sealant coated on the inner side wall of the elastic rubber layer (2) to come off due to deformation. And the annular magnet (15) arranged on the side of the annular baffle (14) can generate magnetic attraction with the embedded wall-piercing casing (1) to prevent the protective inner cylinder (6) from separating from the inner cavity of the embedded wall-piercing casing (1); Step 3: Install the embedded wall-piercing casing (1) in the concrete casting formwork and fix it. After the concrete is poured and solidified to form a wall, pull out the protective inner cylinder (6) from the inner cavity of the embedded wall-piercing casing (1), and then insert a formal pipe adapted to the embedded wall-piercing casing (1) into the inner cavity of the embedded wall-piercing casing (1). Since the inner side wall of the elastic rubber layer (2) is trumpet-shaped, the outer side wall of the formal pipe will be squeezed by the elastic rubber layer (2). Due to the existence of the tearing flanges (3), the sealing film (4) will be torn by the friction between the formal pipe and the tearing flanges (3). Therefore, the waterproof sealant coated on the inner wall of the elastic rubber layer (2) can adhere to the outer side wall of the formal pipe and gradually solidify after contacting the water molecules in the air to fill the gap between the embedded wall-piercing casing (1) and the formal pipe, thereby improving the waterproof effect.

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