Waterproof sealing structure for building toilet pipeline penetrating through floor and installation method thereof

Abstract

The present application relates to the technical field of fixed building waterproof sealing, and discloses a waterproof sealing structure and installation method for a building toilet pipeline penetrating a floor. The waterproof sealing structure comprises a pre-buried pipe installed on a floor of a building; a drain pipe penetrating the floor at both ends and located in the pre-buried pipe; a gap between the drain pipe and the pre-buried pipe; and a sealing assembly located in the gap. The sealing assembly comprises an elastic bellows and two sealing members arranged along the axial direction of the drain pipe, and the elastic bellows is located between the two sealing members and coaxial with the drain pipe. The method comprises the following steps: connecting the pre-buried pipe with the floor in advance; penetrating the drain pipe through the pre-buried pipes in sequence to form a gap between the drain pipe and the pre-buried pipe; and loading the two sealing members and the elastic bellows into the gap along the axial direction of the drain pipe, with the elastic bellows located between the two sealing members. The present application solves the technical problem that the traditional rigid sealing structure of a building floor is prone to failure after long-term use.

Description

Technical Field

[0001] This invention relates to the field of waterproofing and sealing technology for fixed buildings, and in particular to a waterproofing and sealing structure and installation method for pipes penetrating floor slabs in bathrooms of buildings. Background Technology

[0002] In the construction of floor slabs in building projects, the waterproofing and sealing of pipe penetrations is a crucial aspect affecting the durability and functionality of the building structure. Especially in water-contaminated areas such as bathrooms, the pipe penetration points are constantly exposed to a damp environment. Once the waterproofing and sealing fail, it can easily lead to building defects such as floor slab leakage, steel reinforcement corrosion, and structural layer erosion, severely reducing the safety and quality of life of the building.

[0003] Over long-term use, building floor slabs experience concrete shrinkage, creep, and uneven settlement; meanwhile, drainage pipes expand and contract due to temperature changes in the medium. Traditional rigid sealing structures cannot accommodate these axial dimensional changes, leading to easy failure after prolonged use. Summary of the Invention

[0004] This application discloses a waterproof sealing structure and installation method for pipes penetrating floor slabs in building bathrooms, in order to solve the technical problem that traditional rigid sealing structures for building floor slabs are prone to failure after long-term use.

[0005] To solve the above problems, the present invention adopts the following technical solution: In a first aspect, this application discloses a waterproof sealing structure for pipes penetrating floor slabs in a building's bathroom, comprising: Embedded pipes are installed in the floor slabs of buildings; The drainage pipe is located inside the pre-embedded pipe, and both ends pass through the floor slab; there is a gap between the drainage pipe and the pre-embedded pipe; A sealing assembly is located within the gap; the sealing assembly includes a resilient bellows and two seals arranged axially along the drain pipe, with the resilient bellows located between the two seals and coaxial with the drain pipe.

[0006] In some designs, the waterproof seal also includes a locking element that can move axially along the drain pipe to drive the sealing assembly to deform radially along the drain pipe.

[0007] In some designs, the seal includes several sealing rings and several first gaskets, which are connected alternately in sequence. The two ends of the elastic bellows abut against the first pad respectively in the axial direction.

[0008] In some designs, the sealing assembly also includes two sealant layers, which are respectively disposed on opposite sides of the two seals.

[0009] In some designs, the locking part is threaded to the drain pipe or pre-embedded pipe, and the bottom abuts against the sealant layer via a second pad.

[0010] In some designs, a sealing gasket is provided at the top of the embedded pipe, and the locking part squeezes the sealing gasket as it moves toward the bottom of the embedded pipe.

[0011] In some designs, the inner wall of the embedded pipe has a stepped structure, which is used to indicate the expected position of the top of the seal when no top sealant layer is provided; And / or, the locking part is threadedly connected to the pre-embedded pipe, and there is a gap between the locking part and the drain pipe, which is filled with waterproof material.

[0012] In some designs, the floor slab comprises, from top to bottom, a surface layer, a first mortar layer, a floor slab layer, and a second mortar layer, with the first mortar layer having a waterproof structure; and embedded pipes are connected to the floor slab layer via flanges.

[0013] In some designs, one end of the waterproof structure extends to the connection between the surface layer and the embedded pipe; And / or, the joint between the flange and the floor slab is coated with water-swellable sealant.

[0014] Secondly, this application also discloses an installation method for a waterproof sealing structure at the point where a bathroom pipe penetrates a floor slab, used in the waterproof sealing structure of the first aspect, comprising the following steps: When constructing a building, the pre-embedded pipes are connected to the floor slab in advance; The drain pipe is passed through multiple pre-buried pipes in sequence, creating a gap between the drain pipe and the pre-buried pipes; Insert the two seals and the flexible bellows into the gap along the axial direction of the drain pipe, with the flexible bellows positioned between the two seals.

[0015] The technical solution adopted in this invention can achieve the following beneficial effects: The waterproof sealing structure at the point where the bathroom pipes penetrate the floor slab in this application allows for flexible compression or stretching along the axial direction of the drain pipe when the floor slab shrinks or the drain pipe expands or contracts due to thermal expansion or contraction. This maintains a reliable airtight and watertight barrier through its own corrugated wall, and its elastic expansion and contraction adjusts the axial span and contact state between the two seals in real time. This dynamically compensates for the installation preload and fit of the two seals, ensuring that the sealing interface of the two seals is always within an effective elastic compression range. This prevents stress concentration due to excessive compression or the formation of through gaps due to stretching of a single seal. At the same time, in repeated alternating stress cycles, the continuous compensation effect of the elastic corrugated pipe can effectively absorb accumulated displacement and reduce the additional shear load acting on the seals, thereby maintaining the interface pressure stability and long-term fatigue durability of the entire sealing assembly. This fundamentally solves the defect of rigid structures that inevitably fail due to the lack of a compensation mechanism. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of a waterproof sealing structure for a building bathroom pipe penetrating a floor slab, as disclosed in some embodiments of this application; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 yes Figure 1 Enlarged view of point B in the middle; Figure 4 yes Figure 1 Enlarged view of point C in the middle; Figure 5 This is a schematic diagram of the structure of the elastic bellows in an uncompressed state as disclosed in some embodiments of this application; Figure 6 This is a schematic diagram of the structure of the elastic bellows disclosed in some embodiments of this application when it is in a compressed state.

[0018] In the picture: 100 - Embedded pipe, 110 - Stepped structure, 120 - Wing plate, 130 - Water-swellable sealant, 140 - Sealing gasket; 200 - drain pipe, 210 - gap; 300-gap; 400 - Sealing assembly, 410 - Flexible bellows, 420 - Seal, 421 - Sealing ring, 422 - First gasket, 430 - Sealing adhesive layer; 500 - Floor slab, 510 - Surface layer, 520 - First mortar layer, 521 - Waterproof structure, 530 - Floor slab layer, 540 - Second mortar layer; 600 - Locking part, 610 - Second pad. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] During their research on waterproofing and sealing of buildings, the inventors discovered that traditional rigid sealing structures cannot adapt to changes in axial dimensions caused by floor slab shrinkage, creep, uneven settlement, and thermal expansion and contraction of pipes. When the floor slab undergoes downward deflection or overall settlement due to concrete drying shrinkage or creep under long-term load, the embedded pipe moves downward synchronously with the floor slab. However, the drainage pipe, due to different vertical constraints, may not experience the same displacement. This alters the relative axial position between the two components. Rigid seals (such as simply interference-fit rubber rings or rigid sealant) cannot be compressed to absorb the floor slab's upward movement or stretched to follow its downward settlement. This results in either stress concentration at the sealing interface due to excessive compression, accelerating material fatigue or causing localized cracking, or the formation of through-cracks due to tensile separation. When hot water flows through the pipe, the drainage pipe undergoes axial deformation... Linear thermal expansion occurs when the embedded pipe, fixed to the floor slab, cannot extend synchronously. Rigid seals, lacking expansion margin, are forced to withstand axial compression or shear forces from the drainage pipe. This additional mechanical load not only causes the elastic compression of the sealing material to exceed its design limit but also leads to cumulative plastic deformation or interfacial peeling during repeated thermal expansion and contraction cycles, gradually losing the initial sealing preload. Even more problematic is that floor slab shrinkage and creep is a slow and continuous process, while pipe temperature changes are periodic and instantaneous. The coupling effect of these two factors over time keeps the rigid sealing structure under alternating stress for extended periods. Each displacement cycle induces microcracks within the sealing material or at the bonding interface. As the number of cycles increases, these microcracks expand and interconnect, eventually forming leakage channels invisible to the naked eye but permeable to water molecules. Therefore, the failure of rigid seals is not a single, instantaneous destruction but rather a gradual accumulation of damage over service life due to the lack of an axial displacement compensation mechanism, resulting in an inability to maintain stable sealing interface pressure and ultimately, failure after prolonged use.

[0022] The following is in conjunction with the appendix Figures 1 to 6 This application provides a detailed description of a waterproof sealing structure and installation method for a bathroom pipe penetrating 500mm of a floor slab, through specific embodiments and application scenarios.

[0023] Some embodiments of this application disclose a waterproof sealing structure for a bathroom pipe penetrating a floor slab 500, including a pre-embedded pipe 100, a drain pipe 200, a floor slab 500, a sealing component 400, and a locking part 600.

[0024] like Figure 1As shown, the embedded pipe 100 is installed on the floor slab 500 of the building. The fundamental purpose of setting up the embedded pipe 100 is to provide a structural reserved channel for the drainage pipe 200 to pass through the floor slab 500, so as to form a fixed installation base independent of the drainage pipe 200 body. On the one hand, the outer wall of the embedded pipe 100 is used to achieve a firm mechanical fixation with the concrete of the floor slab 500, thereby structurally transmitting the deformation displacement such as deflection and settlement of the floor slab 500 through the wall of the embedded pipe 100. On the other hand, the inner wall of the embedded pipe 100 provides a flat and continuous pressure-bearing interface and bonding base for the subsequent filling sealing material, so that the drainage pipe 200 can complete axial passage inside the embedded pipe 100, while avoiding the direct rigid contact between the outer wall of the drainage pipe 200 and the concrete of the floor slab 500, which would cause local crushing or excessive friction constraint.

[0025] like Figure 1 As shown, the drain pipe 200 is located inside the pre-embedded pipe 100, and both ends pass through the floor slab 500 respectively; there is a gap 300 between the drain pipe 200 and the pre-embedded pipe 100; the sealing assembly 400 is located inside the gap 300; the sealing assembly 400 includes an elastic bellows 410 and two sealing elements 420, the two sealing elements 420 are arranged along the axial direction of the drain pipe 200, the elastic bellows 410 is located between the two sealing elements 420 and is coaxial with the drain pipe 200. When the floor slab 500 shrinks and creeps or the drainage pipe 200 expands and contracts due to thermal expansion and contraction, causing changes in the axial relative position between the drainage pipe 200 and the embedded pipe 100, the elastic bellows 410 located between the two sealing elements 420 can freely undergo compression or tension deformation along the axial direction of the drainage pipe 200. It maintains a reliable airtight and watertight barrier through its own bellows wall, and adjusts the axial span and contact state between the two sealing elements 420 in real time through its elastic expansion and contraction. This dynamically compensates for the installation preload and fit of the two sealing elements 420, ensuring... The sealing interface of the two seals 420 is always within the effective elastic compression range, avoiding stress concentration due to excessive compression of a single seal 420 or the formation of a through gap 210 due to tensile separation. At the same time, in repeated alternating stress cycles, the continuous compensation effect of the elastic bellows 410 can effectively absorb the accumulated displacement and reduce the additional shear load acting on the seal 420, thereby maintaining the interface pressure stability and long-term fatigue durability of the entire sealing assembly 400, fundamentally solving the defect that rigid structures will inevitably fail due to the lack of compensation mechanism.

[0026] like Figure 1 and Figure 2As shown, the locking part 600 can move axially along the drain pipe 200 to drive the sealing assembly 400 to deform radially along the drain pipe 200. By advancing or retracting the locking part 600 axially, the sealing assembly 400 can be forced to produce elastic or plastic deformation radially along the drain pipe 200, thereby actively regulating the radial contact pressure and contact area between the sealing assembly 400 and the outer wall of the drain pipe 200 and the inner wall of the embedded pipe 100. This conversion mechanism can not only flexibly set the initial sealing pressure according to the actual working conditions during the installation stage, but also dynamically compensate for the radial contact relaxation caused by the fatigue of the elastic bellows 410 or the wear of the seal 420 when the floor slab 500 shrinks and creeps or the axial relative position of the drain pipe 200 shifts due to thermal expansion and contraction during the service life by adjusting the axial position of the locking part 600. This ensures that the radial deformation of the sealing assembly 400 is always maintained within the threshold range required for effective sealing, thereby significantly enhancing the active adaptability of the entire sealing system to axial displacement fluctuations and long-term pressure stability.

[0027] For example, such as Figure 5 As shown, at this time, the corrugated pipe is not compressed, and there is a certain distance between the corrugated pipe and the pre-embedded pipe 100 and the drainage pipe 200; as Figure 6 As shown, at this time, the corrugated pipe is compressed and abuts against the pre-embedded pipe 100 and the drainage pipe 200 to form a labyrinth seal structure, which can dynamically compensate for the two seals 420 while also providing a good waterproof effect.

[0028] like Figure 2 As shown, the sealing element 420 includes a plurality of sealing rings 421 and a plurality of first gaskets 422, which are connected alternately in sequence; the two ends of the elastic bellows 410 abut against the first gaskets 422 respectively. The rigid first pad 422 separates each sealing ring 421 into an independent sealing unit. At the same time, the axial ends of the elastic bellows 410 abut against the first pad 422 instead of directly contacting the sealing rings 421. Therefore, the axial compressive or tensile load applied by the bellows is first evenly distributed through the flat end face of the first pad 422 before being transferred to the adjacent sealing rings 421. This avoids local cutting or stress concentration of the sealing rings 421 by the bellows end and ensures that each sealing ring 421 can independently undergo radial deformation and form its own contact pressure ring when radially compressed by the locking part 600. The deformations of each sealing ring 421 are not coupled. In addition, the series barrier structure formed by the alternating sealing rings 421 and the pad ensures that even if one sealing ring 421 is locally aged or damaged due to long-term service, the remaining sealing rings 421 can still maintain an effective sealing interface by relying on the rigid support of the adjacent first pad 422. This greatly improves the resistance of the sealing element 420 to axial displacement fluctuations and repeated radial loading and enhances its long-term service reliability.

[0029] like Figure 2 and Figure 3 As shown, the sealing assembly 400 also includes two sealing layers 430, which are respectively disposed on opposite sides of the two seals 420. Two sealing layers 430 are respectively disposed on opposite sides of the two sealing elements 420. The two sealing layers 430 serve as the first and last layers of protection, respectively. As the first layer of seal, the outer sealing layer 430 can seal the internal sealing ring 421 before the external medium comes into contact with it. Relying on its filling and adhesion properties, it fills the microscopic installation gap 300 between the end of the sealing element 420 and the outer wall of the drain pipe 200 and the inner wall of the pre-embedded pipe 100, blocking the initial intrusion path of external water pressure or moisture from the source. As the last layer of seal, the other outer sealing layer 430 forms the final bottom barrier after several internal sealing rings 421. When the internal sealing ring 421 ages, wears, or has micro-leakage at the interface after long-term service, this layer can still maintain a continuous and dense sealing layer at the outermost end of the sealing element 420. Thus, with the redundant design of double interception at the beginning and end, the absolute sealing safety margin and long-term failure safety of the entire sealing assembly 400 under extreme displacement conditions are significantly improved.

[0030] Specifically, the sealant layer 430 is made of polyurethane material.

[0031] like Figure 2 and Figure 3 As shown, the locking part 600 is threadedly connected to the drain pipe 200 or the pre-embedded pipe 100, and its bottom abuts against the sealant layer 430 via the second pad 610. The threaded connection between the locking part 600 and the drain pipe 200 or the pre-embedded pipe 100 allows for precise stepless adjustment and reliable self-locking of the axial position of the locking part 600 through screwing in or out, preventing loosening due to vibration or displacement during use. Simultaneously, the bottom of the locking part 600 abuts against the sealant layer 430 via the second pad 610, rather than directly against it. This second pad 610 acts as a rigid bearing surface, uniformly converting the axial thrust applied by the locking part 600 into surface contact pressure on the sealant layer 430 and the entire sealing assembly 400 end face, thus avoiding... The locking part 600 directly rotates and squeezes the sealing layer 430, causing the layer to twist, tear, or be damaged by local overpressure. This also allows the axial adjustment force to be effectively compacted after being smoothly transmitted through the second pad 610, and to work together to drive the internal sealing ring 421 to produce the required radial deformation. Thus, while ensuring that the adjustment action is precise and controllable and the locking state is stable over a long period of time, the integrity of the sealing layer 430 and the uniformity of the force on the sealing component 400 are fully protected, significantly improving the operational reliability and sealing maintenance capability of the sealing system during installation, adjustment, and service life.

[0032] In a preferred embodiment, the locking part 600 is threadedly connected to the pre-embedded pipe 100, and a gap 210 is formed between the locking part 600 and the drain pipe 200, which is filled with waterproof material. The threaded connection between the locking part 600 and the pre-embedded pipe 100 ensures reliable axial adjustment and self-locking. At the same time, the waterproof material filled in the gap 210 forms a flexible sealing barrier at the threaded connection interface of the locking part 600, preventing external water or moisture from penetrating into the inner sealing component 400 along the gap 210, thereby effectively sealing the potential leakage channel and significantly improving waterproof reliability.

[0033] like Figure 3 As shown, the inner wall of the embedded pipe 100 has a stepped structure 110, which is used to indicate the expected position of the top of the seal 420 when the top sealant layer 430 is not provided. By fixing the predetermined position of the end face of the top seal 420 (when the top sealing layer 430 is not installed) to the inner wall of the embedded pipe 100 in the form of a step, the installer can use this step as a reference to accurately determine whether the seal 420 has been pushed to the designed axial depth during the assembly process. This ensures that the axial span between the two seals 420 matches the free length and pre-compression of the elastic bellows 410, avoiding premature fatigue of the elastic bellows 410 due to excessive or insufficient initial compression caused by the seals 420 being installed too deep or too shallow, or insufficient to establish effective pre-tightening force. At the same time, after both seals 420 are in place, it is only necessary to observe the actual alignment between the end face of the top seal 420 and the step to visually verify whether there are any omissions, misalignments, or axial cumulative deviations in the installation of the seals 420, the order of the gaskets, and the installation of the elastic bellows 410. If the actual end face position deviates from the step indication position, it indicates that there is an error in the installation process or that the elastic bellows 410 has undergone abnormal deformation, and it needs to be readjusted immediately. The stepped structure 110 transforms the originally invisible internal axial positional relationship into a visually inspectable physical scale, effectively ensuring the accuracy and consistency of the installation of the sealing assembly 400, and providing an intuitive benchmark for abnormal axial displacement during its service life, making it easier to quickly determine whether the internal condition is abnormal during later maintenance and inspection.

[0034] like Figure 1 and Figure 4As shown, the floor slab 500 includes a surface layer 510, a first mortar layer 520, a floor slab layer 530 and a second mortar layer 540 connected sequentially from top to bottom. The first mortar layer 520 is covered with a waterproof structure 521. The embedded pipe 100 is connected to the floor slab layer 530 through the wing plate 120. The surface layer 510 and the first mortar layer 520 serve as the top structural layer of the floor slab 500. The waterproof structure 521 laid inside them can first cut off a large amount of daily seepage on the surface of the floor slab 500, reducing the waterproof pressure on the lower sealing components 400. The embedded pipe 100 is rigidly anchored to the floor slab layer 530 through the flange 120, so that the embedded pipe 100 and the floor slab layer 530 maintain synchronous displacement during concrete shrinkage, creep and uneven settlement. The flange 120 evenly transfers the deformation load of the floor slab layer 530 to the outer wall of the embedded pipe 100, avoiding local stress concentration. At the same time, the embedded pipe 100 is only fixed to the floor slab layer 530 and does not form a rigid bond with the upper and lower mortar layers and the surface layer 510, thus allowing the first mortar layer to be rigidly bonded to the floor slab layer 530. The dimensional changes of layer 520 and the second mortar layer 540 caused by temperature and humidity variations are freely released between the outer wall of the embedded pipe 100 and the mortar layer, without imposing additional axial shear or bending constraints on the embedded pipe 100. In addition, the second mortar layer 540, as a bottom leveling and protective layer, can isolate the moisture under the floor slab layer 530 and protect the bottom connection area of ​​the embedded pipe 100. Finally, the anchoring of the flange 120 to the floor slab layer 530 ensures that the embedded pipe 100 obtains a stable and clear axial positioning reference throughout the full thickness of the floor slab 500, providing a reliable installation base for the sealing assembly 400, and significantly enhancing the structural coordination and long-term durability of the entire through-floor waterproof sealing system under the differential deformation of multi-layer structures.

[0035] Specifically, a water-swellable sealant 130 is applied to the connection between the flange 120 and the floor slab 500. The water-swellable sealant 130 expands upon contact with water at the connection between the flange 120 and the floor slab 500, dynamically sealing the micro-cracks caused by deformation at the interface, thereby effectively blocking the leakage path of water along the outer wall of the embedded pipe 100 and the floor slab 500.

[0036] Some embodiments of this application also disclose an installation method for a waterproof sealing structure at a point 500mm from a floor slab in a building's bathroom, used for installing the waterproof sealing structure, including the following steps: Step 100: When constructing the building, connect the pre-embedded pipe 100 to the floor slab 500 in advance; Step 200: Pass the drain pipe 200 through the multiple pre-embedded pipes 100 in sequence, so that a gap 300 is formed between the drain pipe 200 and the pre-embedded pipes 100; Step 300: Insert the two seals 420 and the elastic bellows 410 into the gap 300 along the axial direction of the drain pipe 200, and position the elastic bellows 410 between the two seals 420.

[0037] By connecting and fixing the pre-embedded pipe 100 in advance during the construction stage of the floor slab 500, the firm embedding and positioning accuracy between the pre-embedded pipe 100 and the floor slab 500 are ensured, providing a stable and accurate reference surface for the subsequent installation of the sealing component 400. Then, the drain pipe 200 is sequentially passed through multiple pre-embedded pipes 100 to form a uniform installation gap 300, allowing the drain pipe 200 to freely adjust its alignment and verticality between each floor slab 500 after insertion, while also reserving ample and regular axial installation space for the sealing component 400. Finally, according to the axial direction of the drain pipe 200, the sealing element 420 and the elastic bellows 410 are sequentially installed into the gap 300, and the elastic... The flexible bellows 410 is accurately positioned between the two seals 420. This step-by-step assembly process not only ensures that each seal 420 and the flexible bellows 410 can be smoothly positioned in the correct order and with the preset axial span, avoiding squeezing misalignment or omissions caused by improper installation sequence, but also makes it highly operable in actual construction and easy to check and adjust the installation status of each component. Thus, it can ensure that the two seals 420 and the flexible bellows 410 form a correct series linkage relationship during the installation stage, laying the foundation for establishing the initial pre-tightening force and axial compensation capability of the sealing system, and significantly improving the controllability of the installation quality and the long-term service reliability of the 500 through-floor waterproof sealing structure.

[0038] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0039] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0040] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A waterproof sealing structure for pipes penetrating floor slabs in a building's bathroom, characterized in that, include: Embedded pipes are installed in the floor slabs of buildings; A drain pipe is located inside the pre-embedded pipe, and both ends pass through the floor slab; there is a gap between the drain pipe and the pre-embedded pipe; A sealing assembly is located within the gap; the sealing assembly includes an elastic bellows and two seals arranged axially along the drain pipe, the elastic bellows being located between the two seals and coaxial with the drain pipe.

2. The waterproof sealing structure for bathroom pipes penetrating floor slabs according to claim 1, characterized in that, The waterproof sealing structure also includes a locking part that is axially movable along the drain pipe to drive the sealing assembly to deform radially along the drain pipe.

3. The waterproof sealing structure for bathroom pipes penetrating floor slabs according to claim 1, characterized in that, The sealing element includes a plurality of sealing rings and a plurality of first gaskets, wherein the plurality of sealing rings and the plurality of first gaskets are connected alternately in sequence. The two ends of the elastic bellows abut against the first pad respectively in the axial direction.

4. The waterproof sealing structure for bathroom pipes penetrating floor slabs according to claim 2, characterized in that, The sealing assembly further includes two sealant layers, which are respectively disposed on opposite sides of the two seals.

5. A waterproof sealing structure for bathroom pipes penetrating floor slabs according to claim 4, characterized in that, The locking part is threadedly connected to the drain pipe or the pre-embedded pipe, and the bottom abuts against the sealant layer through the second pad.

6. The waterproof sealing structure for bathroom pipes penetrating floor slabs according to claim 2, characterized in that, The top of the embedded pipe is provided with a sealing gasket, and the locking part squeezes the sealing gasket as it moves toward the bottom of the embedded pipe.

7. A waterproof sealing structure for bathroom pipes penetrating floor slabs according to claim 5, characterized in that, The inner wall of the embedded pipe has a stepped structure, which is used to indicate the expected position of the top of the seal when no top sealant layer is provided; And / or, the locking part is threadedly connected to the pre-embedded pipe, and there is a gap between the locking part and the drain pipe, the gap being filled with waterproof material.

8. A waterproof sealing structure for bathroom pipes penetrating floor slabs according to claim 1, characterized in that, The floor slab includes a surface layer, a first mortar layer, a floor slab layer, and a second mortar layer connected sequentially from top to bottom. The first mortar layer is provided with a waterproof structure. The embedded pipe is connected to the floor slab layer through a wing plate.

9. A waterproof sealing structure for bathroom pipes penetrating floor slabs according to claim 8, characterized in that, One end of the waterproof structure extends to the connection between the surface layer and the embedded pipe; And / or, the connection between the wing plate and the floor slab is coated with water-swellable sealant.

10. A method for installing a waterproof sealing structure at the point where a bathroom pipe penetrates a floor slab in a building, characterized in that, For installing the waterproof sealing structure according to any one of claims 1-9, characterized in that it includes the following steps: When constructing a building, the pre-embedded pipes are connected to the floor slab in advance; The drain pipe is passed through multiple pre-buried pipes in sequence, creating a gap between the drain pipe and the pre-buried pipes; Insert the two seals and the flexible bellows into the gap along the axial direction of the drain pipe, with the flexible bellows positioned between the two seals.

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