Building pipe wall penetration water stop ring

Abstract

The utility model discloses building pipeline wall -penetrating water stop ring belongs to building waterproof technical field. The water stop ring aims at solving the sealing failure and leakage problem of traditional wall -penetrating pipeline because of the relative displacement with wall body. Its technical scheme main points include: the annular matrix of setting in the pipeline outside, and this matrix is composed of deformable section and remaining part, and the outer circumferential wall of annular matrix is equipped with a plurality of annular anchoring ribs with trapezoidal cross section and long bottom edge is connected with the matrix, wherein, the wall thickness of annular matrix gradually increases to both ends from deformable section and forms the arc curved surface of smooth transition, and the axial length of deformable section accounts for 20% to 40% of the total length of annular matrix. The structure absorbs displacement through the flexible deformation of deformable section, and the stress distribution is optimized through the gradually changing wall thickness design, and the anchoring effect with concrete is enhanced in combination with anchoring rib, and is mainly used for the permanent waterproof sealing when pipeline penetrates concrete wall in building.

Description

Technical Field

[0001] This utility model belongs to the field of building waterproofing technology, and in particular relates to a water-stopping ring for building pipes penetrating walls. Background Technology

[0002] In building structures, it is common for pipes to pass through concrete walls. To prevent moisture from seeping in along the gap between the pipe and the wall, a water-stop ring is usually installed on the pipe. Existing water-stop rings for wall penetrations mostly adopt annular metal plates or plastic ring structures, which achieve water stop through the mechanical interlocking of their outer circumference with the concrete.

[0003] These types of water-stop rings exhibit some limitations in practical engineering applications. A common structure is a simple rigid ring with uniform material and wall thickness. When pipes expand and contract due to temperature changes, or when buildings experience slight displacement due to foundation settlement, relative displacement occurs between the pipe and the concrete wall. Rigid water-stop rings struggle to accommodate this displacement, potentially leading to two unfavorable situations: first, the bonding interface between the water-stop ring and the pipe may crack due to excessive stress; second, the contact interface between the water-stop ring and the concrete may loosen. Both of these situations disrupt the continuity of the seal, creating seepage channels.

[0004] To address the issue of insufficient deformation adaptability of rigid water-stop rings, the use of a more flexible rubber material to fabricate the entire water-stop ring is considered. While rubber rings possess a certain degree of deformation capacity, relying solely on the material's own deformation remains challenging during long-term use. Rubber materials may exhibit creep under sustained compressive stress, leading to a relaxation of contact pressure over time. Furthermore, rubber has a low modulus of elasticity; if the water-stop ring's cross-section is improperly designed, it may experience excessive deformation or even buckling under external pressure, affecting its sealing stability.

[0005] Another approach is to create dedicated deformation zones on the sealing ring. Some schemes have attempted to create grooves or thinning areas in localized sections of the ring to establish a hinge effect. However, even simple abrupt changes in wall thickness can cause significant stress concentration at the interface. Under repeated pipe displacement, microcracks easily initiate at these stress concentration points and gradually propagate, eventually leading to ring tearing. This type of structural failure often occurs suddenly and is difficult to detect externally, increasing the difficulty and cost of maintenance.

[0006] For applications with large expected displacements, relying solely on the elastic deformation of polymer materials may be insufficient to meet long-term sealing requirements. One approach involves incorporating a metal skeleton into the rubber ring to improve its shape retention. However, if the metal skeleton deforms synchronously with the ring, its rigidity will constrain the ring's flexibility, weakening its ability to adapt to displacement. Furthermore, if the metal skeleton is discontinuous within the ring, it may introduce new stress concentration points and cause durability issues at the bonding interface between the skeleton and the rubber.

[0007] Therefore, in the design of through-wall sealing rings, coordinating the following contradictions becomes a technical challenge: sufficient structural rigidity is needed to maintain shape and reliably anchor to concrete, while sufficient local flexibility is required to accommodate displacement between the pipe and the wall; wall thickness must be reduced in critical areas to promote deformation, while stress concentration caused by abrupt changes in wall thickness must be avoided; the ring structure must be reinforced with metal materials, while ensuring that the functions of the reinforcement structure and the flexible deformation zone do not conflict. These difficulties leave room for improvement in developing a through-wall sealing ring that can operate reliably for a long time and adapt to various working conditions. Summary of the Invention

[0008] One object of the present invention is to solve at least the above-mentioned problems and / or defects, and to provide at least the advantages described below.

[0009] Another objective of this invention is to provide a water-stop ring for building pipes penetrating walls.

[0010] This solution addresses the problems of traditional through-wall sealing rings, which are prone to failure due to excessive rigidity and inability to adapt to displacement between pipes and walls, or due to stress concentration and easy breakage caused by unreasonable local deformation design, thus leading to sealing failure and leakage.

[0011] This addresses the issues of creep, insufficient resilience, and poor long-term fatigue resistance that may arise from relying solely on the elastic deformation of polymer materials under conditions requiring large expected displacements or higher durability.

[0012] This addresses the issue of potential loosening of the sealing contact pressure between the water-stop ring and the outer wall of the pipe under dynamic operating conditions, leading to gaps at the sealing interface and leakage.

[0013] This addresses the issues that may arise during the installation and long-term use of sealing flanges, such as excessive initial installation resistance, easy wear, or insufficient seal follow-through due to improper shape or material.

[0014] This addresses the problem that when the waterstop ring undergoes lateral bending deformation, the anchoring ribs of uniform height on its surface will exert strong pressure on the surrounding concrete, hindering deformation and potentially causing localized concrete breakage, thereby weakening the anchoring effect.

[0015] This addresses the problem of reduced sealing performance of the initial interference fit due to on-site installation deviations, pipeline vibration, or long-term wear of the sealing flange, and the lack of an effective secondary sealing guarantee mechanism.

[0016] The goal is to address how to ensure that waterstop rings with complex gradient structures and functional areas can be manufactured as a single-piece component efficiently, economically, and reliably through material and process selection.

[0017] Therefore, the technical solution provided by this utility model is as follows: A wall-penetrating water-stop ring for building pipes includes: an annular base, which is an annular structure composed of deformable segments and remaining portions connected to each other, fitted onto the outer wall of the pipe; a plurality of annular anchoring ribs, which protrude radially from the outer peripheral wall of the annular base, wherein the cross-section of the anchoring ribs is trapezoidal, and the long base of the trapezoid is connected to the outer peripheral wall of the annular base; wherein the wall thickness of the annular base gradually increases from the deformable segments to both ends, and its inner wall surface and / or outer wall surface form a smoothly transitioning arc-shaped curved surface, and the axial length of the deformable segments accounts for 20% to 40% of the total axial length of the annular base.

[0018] Preferably, an annular metal skeleton is pre-embedded in the annular matrix; the metal skeleton is constructed as an axially expandable corrugated pipe structure in the region corresponding to the deformable segment, and the annular matrix body covers the corrugated pipe structure to form the deformable segment.

[0019] Preferably, the inner peripheral wall of the annular base, corresponding to the region of the deformable section, protrudes inward in the circumferential direction to form an annular sealing flange, the inner diameter of which is smaller than the outer diameter of the pipe.

[0020] Preferably, the sealing flange is made of thermoplastic elastomer, and the longitudinal cross-sectional shape of the sealing flange is either arc-shaped or wedge-shaped.

[0021] Preferably, the radial height of the anchoring ribs located in the axial region of the deformable segment on the outer peripheral wall of the annular base is less than the radial height of the anchoring ribs located in the remaining region.

[0022] Preferably, the root of the sealing flange and the inner peripheral wall of the annular base are connected by an annular groove to form the glue storage tank, and the cross-section of the glue storage tank is arc-shaped or trapezoidal; the glue storage tank is filled with sealant.

[0023] Preferably, the annular matrix is ​​made of a thermoplastic elastomer.

[0024] The beneficial effects of this utility model are: This invention features a deformable section with a gradually increasing wall thickness at both ends and a smoothly transitioning arc-shaped surface, giving the water-stop ring a clearly defined flexible deformation area in the axial direction. This structure effectively adapts to the relative displacement between the pipe and the wall, and smoothly transmits and disperses deformation stress, significantly reducing the risk of ring tearing due to stress concentration. This, in turn, improves the sealing reliability and service life of the water-stop ring under dynamic operating conditions.

[0025] This invention provides the ring with strong and precise axial expansion and contraction guidance and elastic recovery force by pre-embedding a metal skeleton and constructing it as a bellows structure in the deformable section. This composite structure combines the excellent fatigue resistance and shape stability of metal with the good sealing properties of polymer materials, enabling the water-stop ring to withstand larger and more frequent displacements without worrying about material creep or permanent deformation, greatly enhancing its long-term working performance in harsh environments.

[0026] This invention achieves an interference fit with the pipe surface by setting an annular sealing flange with an inner diameter smaller than the outer diameter of the pipe on the inner peripheral wall of the deformable section region. This forms an active and continuous radial clamping seal, ensuring that the sealing interface remains in tight contact when the pipe is displaced, effectively preventing media leakage caused by gaps.

[0027] This invention endows the sealing flange with excellent elasticity, toughness, and wear resistance by limiting the sealing flange to be made of thermoplastic elastomer and adopting a specific cross-sectional shape. The arc-shaped or wedge-shaped cross-section can effectively reduce frictional resistance during installation, avoid scratching the pipeline, and provide stable and well-following contact pressure during service, ensuring the long-lasting effectiveness of the dynamic seal.

[0028] This invention creates a "stress relief zone" that facilitates lateral bending deformation by making the radial height of the anchoring ribs in the deformable section region smaller than in other regions. This differentiated design ensures sufficient anchoring strength at both ends of the waterstop ring within the concrete while allowing the flexible middle section to bend more freely under stress, thus avoiding excessive compression and damage to the surrounding concrete and maintaining the integrity of the anchoring system.

[0029] This invention provides a dedicated storage space for sealant application in the field by setting an annular sealant reservoir at the root of the sealing flange. This additional sealing measure constitutes a reliable secondary sealing defense. Even if the initial interference fit seal deteriorates due to long-term use or unexpected events, the sealant stored in the reservoir can continue to effectively block water seepage paths, significantly improving the safety redundancy and reliability of the sealing system.

[0030] This invention ensures that waterstop rings with complex geometries and functional gradient requirements can be seamlessly manufactured as a single unit by integrally injection molding a defined annular matrix from thermoplastic elastomer. This process guarantees the dimensional accuracy and structural consistency of the product, avoids interface weaknesses that may arise from secondary processing or bonding, and allows the various design functions of the waterstop ring to be stably and fully realized.

[0031] Other advantages, objectives, and features of the embodiments of this utility model will be apparent in part from the following description, and in part will be understood by those skilled in the art through study and practice of the embodiments of this utility model. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a wall-penetrating water-stop ring for building pipes in one of the embodiments of this utility model.

[0033] Figure 2 This is a schematic diagram of the sealing flange in one embodiment of the present invention. Detailed Implementation

[0034] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement them based on the description.

[0035] According to one embodiment of this utility model, a water-stop ring for building pipes penetrating walls, such as... Figure 1 and Figure 2 As shown, it includes: The annular base 1, which is an annular structure composed of deformable segments 2 connected to each other and the remaining part, is fitted onto the outer wall of the pipe. Multiple annular anchoring ribs 3 are radially protruding from the outer peripheral wall of the annular base 1. The cross-section of the anchoring ribs 3 is trapezoidal, and the long base of the trapezoid is connected to the outer peripheral wall of the annular base 1. The wall thickness of the annular base 1 gradually increases from the deformable segment 2 towards both ends, and its inner wall surface and / or outer wall surface form a smoothly transitioning arc-shaped curved surface. The axial length of the deformable segment 2 accounts for 20% to 40% of the total axial length of the annular base 1.

[0036] In the field of waterproofing pipe penetrations through walls in building construction, traditional water-stop rings typically employ a rigid ring structure with a uniform wall thickness. When the pipe undergoes relative displacement with the wall due to temperature changes or settlement, this structure, lacking effective deformation capacity, is prone to generating excessive stress at the bonding interface between the water-stop ring and the pipe or concrete, leading to interface cracking and the formation of seepage channels.

[0037] This invention provides an improved water-stop ring. The annular base 1 of the water-stop ring is fitted onto the outer wall of a pipe, and its outer peripheral wall is provided with multiple annular anchoring ribs 3. These anchoring ribs 3 have trapezoidal cross-sections, and the long base of the trapezoids connects to the outer peripheral wall of the annular base 1. The annular base 1 is constructed with a deformable segment 2, the wall thickness of which gradually increases towards both ends of the annular base 1, and a smoothly transitioning arc-shaped surface is formed at the inner and outer wall surfaces where the wall thickness changes. The axial length of the deformable segment 2 is designed to account for 20% to 40% of the total axial length of the annular base 1. The annular base 1 can be manufactured using a thermoplastic elastomer through a one-piece injection molding process.

[0038] Existing technologies often use rigid polyvinyl chloride (PVC) rings with uniform wall thickness, which have high rigidity and lack dedicated wall thickness gradient zones and curved transition surfaces.

[0039] In tests simulating axial displacement between a pipe and a wall, the uniform wall thickness waterstop ring quickly developed visible cracks at the joint between the ring and the pipe. However, this invention exhibits different behavior; its thinnest deformable segment 2 first undergoes compliant bending deformation, and stress is smoothly transferred through the curved surface to the thicker areas, with no signs of cracking throughout the entire ring.

[0040] The beneficial effects of this invention lie in the fact that, through the design of gradually varying wall thickness and an arc-shaped surface, a flexible deformation zone is provided that can effectively adapt to displacement, significantly reducing stress concentration and enabling the water-stop ring to maintain structural integrity and sealing function when the pipeline shifts. The trapezoidal design of the anchor rib 3 enhances the mechanical interlocking force with the concrete. The specific length ratio of the deformable section 2 ensures that the ring body has sufficient deformation capacity while maintaining overall structural stability. This combined structural design improves the long-term sealing reliability of the water-stop ring under dynamic operating conditions.

[0041] According to one preferred embodiment of this utility model, a wall-penetrating water-stopping ring for building pipes includes an annular metal skeleton pre-embedded within the annular base 1. The metal skeleton is constructed as an axially expandable corrugated pipe structure 6 in the region corresponding to the deformable segment 2. The annular base 1 covers the corrugated pipe structure 6 to form the deformable segment 2. The annular base 1 is typically made of a flexible material such as rubber or plastic.

[0042] This invention utilizes a metal skeleton with a corrugated pipe structure 6 to provide precisely guided axial expansion and contraction capabilities for the deformable section 2. The metal corrugated pipe endows the water-stop ring with strong elastic recovery and fatigue resistance, effectively preventing relaxation or creep that may occur in the polymer material under long-term repeated deformation. The outer polymer coating continues to ensure good adhesion and sealing with the concrete and pipes. This composite structure works synergistically, enabling the water-stop ring to adapt to larger and more frequent displacements while maintaining long-lasting sealing performance.

[0043] According to one preferred embodiment of the present invention, a wall-penetrating water-stopping ring for building pipes has an annular sealing flange 4 formed by the inner peripheral wall of the annular base 1 corresponding to the area of ​​the deformable section 2, protruding inward in the circumferential direction. The inner diameter of the sealing flange 4 is smaller than the outer diameter of the pipe.

[0044] This invention achieves an interference fit with the pipe surface by setting a sealing flange 4 with an inner diameter smaller than the outer diameter of the pipe. This forms an active and continuous radial compression seal. When the pipe undergoes slight displacement due to temperature changes or vibration, the sealing flange 4 can continuously track the pipe surface through its own elastic deformation, maintaining tight contact at the sealing interface. This design effectively solves the problem of traditional sealing methods relying on static bonding failing under dynamic conditions, significantly improving the reliability of the seal.

[0045] According to one embodiment of the present invention, preferably, the sealing flange 4 is made of thermoplastic elastomer, and the longitudinal cross-sectional shape of the sealing flange 4 is either arc-shaped or wedge-shaped.

[0046] This invention comprehensively improves the performance of the sealing component by using a thermoplastic elastomer for the sealing flange 4 and optimizing its cross-sectional shape. The thermoplastic elastomer combines the elasticity of rubber with the strength of plastic, giving the sealing flange 4 excellent resilience and resistance to permanent deformation. The arc-shaped or wedge-shaped cross-section design guides the pipe installation, significantly reducing frictional resistance and preventing scratches on the pipe or damage to the sealing flange 4 itself. This optimized combination of material and shape ensures that the sealing flange 4 maintains a stable and effective sealing contact pressure during long-term use. According to one embodiment of the present invention, preferably, the radial height of the anchoring rib 3 located in the axial region of the deformable segment 2 on the outer peripheral wall of the annular base 1 is less than the radial height of the anchoring rib 3 located in the remaining region. The radial height H1 of the anchoring rib 3 located in the axial region of the deformable segment 2 and the radial height H2 of the anchoring rib 3 located in the rigid regions at both ends satisfy the following relationship: H1 = (30% ~ 70%) H2. Preferably, H1 = 50% H2.

[0047] This invention achieves optimized allocation of functional areas by precisely defining the height ratio between the deformable section 2 and the rigid anchoring rib 3. The lower rib height in the flexible section significantly reduces the mechanical locking force between this area and the concrete, providing the necessary bending space for the ring to withstand lateral loads, thus effectively releasing stress. The higher rib height in the rigid section ensures sufficient anchoring force in the concrete, preventing overall slippage. This proportional design balances the contradiction between deformation adaptability and structural stability, enabling the waterstop ring to more effectively cope with complex combined displacements.

[0048] According to one preferred embodiment of this utility model, a wall-penetrating sealing ring for building pipes includes an annular adhesive storage groove 5 formed between the root of the sealing flange 4 and the inner peripheral wall of the annular base 1. The root of the sealing flange 4 and the inner peripheral wall of the annular base 1 are formed into an annular groove through machining or molding; this groove is the adhesive storage groove. Before pipe installation, the adhesive storage groove is a completely open annular groove, facilitating the smooth filling of sealant using a glue gun or manually during construction. The cross-section of the adhesive storage groove is shaped into an arc or trapezoid. In the free state where the sealing ring is not installed, the free end of the sealing flange 4 extends radially towards the central axis, exceeding the theoretical cylindrical surface defined by the inner peripheral wall of the annular base 1.

[0049] This invention provides an ideal space for the filling and retention of sealant by defining the adhesive reservoir as an annular groove with a specific cross-sectional shape and ensuring that the free end of the sealing flange 4 protrudes from the inner wall of the substrate in its natural state. The arc shape offers good capacity, while the trapezoidal shape provides a large and stable volume. The protruding design of the sealing flange 4 ensures that the adhesive reservoir maintains an effective closed cavity after pipe insertion, preventing sealant loss before curing. This structure provides a reliable secondary sealing barrier against potential performance degradation during initial sealing, enhancing the durability and safety of the entire sealing system. According to one embodiment of the present invention, preferably, the annular matrix 1 is made of a thermoplastic elastomer. For example, the annular matrix 1 is manufactured from a thermoplastic elastomer using a one-piece injection molding process.

[0050] Existing technologies involve manufacturing water-stop rings using ordinary rubber that requires a vulcanization process, or assembling them using rigid plastics through segmented welding or bonding.

[0051] This invention utilizes thermoplastic elastomers and integral injection molding to ensure that waterstop rings with complex geometries and functional gradient requirements can be manufactured as a seamless whole. This process guarantees the integrity and dimensional accuracy of the product structure, eliminates interface weaknesses and potential leakage paths that may be introduced by secondary processing or bonding, and allows the wall thickness gradient area, anchoring ribs 3, and other functional features to stably and reliably perform their design performance.

[0052] The specific working process of the water-stop ring for pipe penetration through the wall in this building is as follows: During the construction phase, the sealing ring is first placed at the designed pipe penetration point. The annular base 1 is made of thermoplastic elastomer, and its inner circumferential wall has a sealing flange 5 in the deformable section. The inner diameter of this flange is about 0.5-1.5mm smaller than the outer diameter of the pipe, forming an initial interference fit. When the pipe passes through the annular base, the sealing flange, with its arc-shaped or wedge-shaped cross-section, undergoes elastic deformation, generating a continuous radial clamping force to achieve the first seal. At this time, the construction personnel can inject sealant into the sealant reservoir formed between the root of the sealing flange and the inner circumferential wall of the annular base. The reservoir is about 1-2mm deep and has an arc-shaped or trapezoidal cross-section, completing the preparation for the secondary seal.

[0053] During concrete pouring, multiple annular anchoring ribs on the outer perimeter of the ring-shaped base mechanically interlock with the concrete. The radial height H1 of the anchoring ribs located in the deformable section is 3-5 mm, while the height H2 of the anchoring ribs in the rigid sections at both ends is 6-10 mm, satisfying the optimized ratio of H1 = (30%-70%)H2. This differentiated design ensures anchoring strength while also allowing space for subsequent deformation.

[0054] During long-term use, when the pipes and walls experience relative displacement: For axial displacement, the deformable segment 2, which accounts for 20%-40% of the total length of the annular matrix, undergoes flexible deformation. Its wall thickness gradually increases from 1.5 mm at the thinnest point to 3 mm at both ends, and the smooth transition of the arc-shaped surface effectively disperses the stress. When a metal frame is installed, the bellows structure 6 provides precise guidance in the deformable section area, allowing axial expansion and contraction of ±5-8mm. For lateral displacement, the lower deformable section anchor ribs (H1=3-5mm) reduce the constraint on the concrete, enabling the annular matrix to achieve bending deformation of ±2-3mm. The sealing flange 5 maintains a dynamic seal during pipeline displacement. If the initial seal fails, the sealant in the sealant reservoir 6 will automatically fill the gap.

[0055] This water-stop ring, through the coordinated operation of its various structures, can accommodate a combined displacement of up to ±8mm between the pipe and the wall, achieving long-term effective sealing. Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the embodiments of the present invention. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the embodiments of the present invention are not limited to the specific details and illustrations shown and described herein.

Claims

1. A wall-penetrating water-stop ring for building pipes, characterized in that, include: The annular matrix is ​​an annular structure consisting of interconnected deformable segments and the remaining portion, which is fitted onto the outer wall of the pipe. Multiple annular anchoring ribs are radially protruding from the outer peripheral wall of the annular base. The cross-section of the anchoring ribs is trapezoidal, and the long base of the trapezoid is connected to the outer peripheral wall of the annular base. The wall thickness of the annular base gradually increases from the deformable section to both ends, and its inner wall surface and / or outer wall surface form a smoothly transitioning arc-shaped surface. The axial length of the deformable section accounts for 20% to 40% of the total axial length of the annular base.

2. The wall-penetrating water-stop ring for building pipes as described in claim 1, characterized in that, An annular metal skeleton is pre-embedded in the annular matrix; the metal skeleton is constructed as an axially expandable corrugated pipe structure in the region corresponding to the deformable section, and the annular matrix body covers the corrugated pipe structure to form the deformable section.

3. The wall-penetrating water-stop ring for building pipes as described in claim 1, characterized in that, The inner circumferential wall of the annular base corresponds to the region of the deformable section, and protrudes inward in the circumferential direction to form an annular sealing flange, the inner diameter of which is smaller than the outer diameter of the pipe.

4. The wall-penetrating water-stop ring for building pipes as described in claim 3, characterized in that, The sealing flange is made of thermoplastic elastomer, and the longitudinal cross-sectional shape of the sealing flange is either arc-shaped or wedge-shaped.

5. The wall-penetrating water-stop ring for building pipes as described in claim 1, characterized in that, On the outer peripheral wall of the annular base, the radial height of the anchoring rib located in the axial region of the deformable segment is less than the radial height of the anchoring rib located in the remaining region.

6. The wall-penetrating water-stop ring for building pipes as described in claim 3 or 4, characterized in that, The root of the sealing flange and the inner peripheral wall of the annular base are connected by an annular groove to form a glue storage tank. The cross-section of the glue storage tank is arc-shaped or trapezoidal. The glue storage tank is filled with sealant.

7. The wall-penetrating water-stop ring for building pipes as described in claim 1, characterized in that, The annular matrix is ​​made of thermoplastic elastomer.

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