A kind of water supply and drainage pipe anti-seepage device
Patent Information
- Application Number
- CN202522376686.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-11-10
AI Technical Summary
针对以上问题，本实用新型的目的在于：提供一种给排水管防渗装置，解决现有的塑料给排水管材粘接涂胶连接易因施工偏差、胶层老化、缺适配二次密封、抗水压波动差，导致渗漏风险高、维护成本大的问题
[0005]本实用新型的有益效果为：以传统方式在两个水管的外侧涂胶并与防渗套接头插接连接时，水管顺畅的插入密封垫的内侧而后挤压弹性架，使弹性架产生弹性变形进而挤压密封垫，使密封垫与水管实现过盈配合，从而以便捷快速的操作和简单低成本的结构实现对两个水管的密封连接。
Smart Images
Figure CN224730322U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pipeline construction technology, specifically relating to a seepage prevention device for water supply and drainage pipes. Background Technology
[0002] In water supply and drainage engineering, UPVC, CPVC, and other plastic pipes are widely used due to their advantages such as light weight and corrosion resistance. Their connection method is mainly adhesive bonding—a basic connection and seal are achieved by applying a special adhesive to the interface between the pipe and fittings. However, in practical applications, the sealing reliability of existing adhesive bonding methods has inherent defects. It can only meet low-requirement scenarios. Leakage easily occurs under long-term water pressure, environmental changes, or minor construction deviations. Additional enhanced sealing measures are needed, but suitable solutions are lacking. Specific technical problems are as follows: First, the sealing of the adhesive layer requires strict control over its thickness and uniformity. If the adhesive layer is too thin, gaps are likely to form; if it is too thick, air bubbles may accumulate. During insertion, the pipe and fitting axes must be perfectly aligned. A deviation of ≥2mm will result in uneven stress on the adhesive layer, leading to tiny gaps at the joint after curing. In actual construction, it is difficult to completely avoid such deviations through manual operation, requiring repeated inspections later. Secondly, the sealing performance of adhesive coatings is easily affected by environmental factors and time. The adhesive layer formed after curing is a rigid structure. During long-term use, temperature changes can cause micro-cracks at the interface between the adhesive layer and the pipe. Long-term water flow impact or slight pipe displacement will further enlarge the gaps. Traditionally, repairs can only be done by reapplying adhesive, which requires shutting off the water supply and dismantling the joints. This not only affects the use of the product but also increases maintenance costs.
[0003] Furthermore, traditional adhesive coatings have low sealing redundancy and cannot cope with sudden pressure fluctuations. When the water pressure in the water supply and drainage system increases instantaneously, the rigid adhesive layer cannot withstand the impact and is prone to cracking at weak joints. Existing solutions lack buffer or reinforcement structures, so once cracked, leakage occurs. This problem is particularly prominent in high-pressure scenarios such as high-rise water supply and industrial circulating water, requiring frequent replacement of joint components and seriously affecting system stability. Utility Model Content To address the above problems, the purpose of this utility model is to provide a seepage prevention device for water supply and drainage pipes, which solves the problems of high leakage risk and high maintenance costs caused by the easy occurrence of leakage due to construction deviations, aging of adhesive layers, lack of suitable secondary sealing, and poor resistance to water pressure fluctuations in existing plastic water supply and drainage pipe adhesive connections.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a seepage prevention device for water supply and drainage pipes, comprising a seepage prevention sleeve joint, wherein the seepage prevention sleeve joint is composed of an integrally formed sleeve section, a reducing section, and a sealing section. The two ends of the sealing section are connected to one end of the reducing section, and the other end of the reducing section gradually tapers to connect to one end of the sleeve section. The sleeve section is slidably fitted onto the outside of the water pipe. A sealing gasket is bonded and fixed to the inner wall of the reducing section. The opposing end faces of the two sealing gaskets are abutted against the two ends of a connecting elastic frame. The elastic frame and the water pipe are interference fit.
[0005] The beneficial effects of this utility model are as follows: When applying adhesive to the outside of two water pipes and connecting them with the anti-seepage sleeve in the traditional way, the water pipes are smoothly inserted into the inside of the sealing gasket and then the elastic frame is squeezed, causing the elastic frame to deform elastically and then squeeze the sealing gasket, so that the sealing gasket and the water pipe achieve an interference fit. Thus, the sealing connection of the two water pipes is achieved with convenient and quick operation and simple and low-cost structure.
[0006] To allow the water pipe to pass smoothly through the sealing gasket; As a further improvement to the above technical solution: when the sealing gasket is not compressed by the elastic frame, the inner wall of the sealing gasket is flush with the inner wall of the sleeve section.
[0007] The beneficial effects of this improvement are: when the sealing gasket is not squeezed by the elastic frame, the water pipe and the sealing gasket maintain a sliding fit, and the water pipe can smoothly pass through the sealing gasket to contact the elastic frame.
[0008] To ensure the stability of the sealing gasket installation; As a further improvement to the above technical solution: the inner wall of the variable diameter section has an outwardly convex curved surface structure.
[0009] The beneficial effects of this improvement are as follows: compared with directly using a tapered tube to connect the sleeve section and the sealing section, the outward convex curved surface design of the variable diameter section can increase the contact area between the sealing gasket and the leak-proof sleeve joint, and provide better axial support for the sealing gasket when it is pushed by the elastic frame, thus ensuring the installation stability of the sealing gasket.
[0010] In order to ensure that the elastic frame can effectively deform and compress the sealing gasket after being squeezed by the water pipe; As a further improvement to the above technical solution: the elastic frame has an annular tube structure, and the inner diameter of the elastic frame gradually increases from both ends to the middle.
[0011] The beneficial effects of this improvement are as follows: the inner diameter of the middle part of the elastic frame is smaller than the outer diameter of the water pipe. When the water pipe moves towards the middle of the water pipe, the elastic frame undergoes elastic deformation under the push of the water pipe, and the minimum inner diameter increases. Since the elastic frame is supported by the sealing section in the outer radial direction at this time, the length of the deformed elastic frame increases, and it deforms and extends towards the sealing gaskets on both sides, thereby squeezing the sealing gaskets. After the length of the sealing gasket supported by the outer diameter-changing section decreases, the inner diameter decreases accordingly, so as to achieve an interference fit with the water pipe.
[0012] To facilitate the insertion and connection of water pipes and flexible brackets; As a further improvement to the above technical solution: the inner diameter of both ends of the elastic frame is not less than the outer diameter of the water pipe.
[0013] The beneficial effect of this improvement is that the end of the water pipe can be easily inserted into both ends of the elastic frame.
[0014] In order to effectively improve the structural strength of the seepage-proof sleeve joint; As a further improvement to the above technical solution: the connection between the variable diameter section and the sleeve section and the sealing section is rounded.
[0015] The beneficial effects of this improvement are: the rounded corner design on the anti-seepage sleeve joint can reduce the stress concentration at the connection between the reducing section and the sleeve section and the sealing section, thus ensuring the pressure resistance of the anti-seepage sleeve joint.
[0016] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description
[0017] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a cross-sectional view of the seepage-proof sleeve joint in this utility model; Figure 3 This is a front sectional view of the seepage-proof sleeve joint in this utility model; Figure 4 This is an enlarged view of A in this utility model; In the diagram: 1. Leak-proof sleeve joint; 11. Sleeve section; 12. Reducing diameter section; 13. Sealing section; 2. Sealing gasket; 3. Flexible frame; 4. Water pipe. Detailed Implementation
[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.
[0019] Example 1: like Figure 1As shown in Figure 4: A seepage prevention device for water supply and drainage pipes includes a seepage prevention sleeve joint 1. The seepage prevention sleeve joint 1 is composed of an integrally formed sleeve section 11, a reducing section 12, and a sealing section 13. Both ends of the sealing section 13 are connected to one end of the reducing section 12, and the other end of the reducing section 12 gradually tapers to one end of the sleeve section 11. The sleeve section 11 is slidably fitted onto the outside of the water pipe 4. A sealing gasket 2 is bonded and fixed to the inner wall of the reducing section 12. The opposing end faces of the two sealing gaskets 2 are abutted against the two ends of a connecting elastic frame 3. The elastic frame 3 and the water pipe 4 are interference-fitted. When the two water pipes 4 are conventionally glued to the outside and inserted into the seepage prevention sleeve joint 1, the water pipe... 4. Smoothly insert the sealing gasket 2 into the inner side and then squeeze the elastic frame 3, causing the elastic frame 3 to elastically deform and further squeeze the sealing gasket 2, so that the sealing gasket 2 and the water pipe 4 achieve an interference fit. This achieves a sealed connection of the two water pipes 4 with convenient and quick operation and a simple and low-cost structure. When the sealing gasket 2 is not squeezed by the elastic frame 3, the inner wall of the sealing gasket 2 is flush with the inner wall of the sleeve section 11. When the sealing gasket 2 is not squeezed by the elastic frame 3, the water pipe 4 and the sealing gasket 2 maintain a sliding fit. The water pipe 4 can smoothly pass through the sealing gasket 2 to contact the elastic frame 3. The inner wall of the variable diameter section 12 has an outwardly convex curved surface structure, which is more advantageous than directly using a conical section. The convex curved surface design of the connecting sleeve section 11 and sealing section 13, and the variable diameter section 12, increases the contact area between the sealing gasket 2 and the leak-proof sleeve joint 1. It also provides better axial support for the sealing gasket 2 when it is pushed by the elastic frame 3, ensuring the installation stability of the sealing gasket 2. The elastic frame 3 has an annular tube structure, with its inner diameter gradually increasing from both ends to the middle. The inner diameter of the middle part of the elastic frame 3 is smaller than the outer diameter of the water pipe 4. When the water pipe 4 moves towards the middle, the elastic frame 3 undergoes elastic deformation under the push of the water pipe 4, increasing its minimum inner diameter. Because the elastic frame 3 is then subjected to radial force from the sealing section 11, the contact area between the sealing gasket 2 and the leak-proof sleeve joint 1. The elastic frame 3 is supported by the outer diameter section 12, so the length of the deformed elastic frame 3 increases and it deforms and extends towards the sealing gaskets 2 on both sides, thereby squeezing the sealing gaskets 2. After the length of the sealing gasket 2 is reduced, the inner diameter of the sealing gasket 2 supported by the outer diameter section 12 is reduced accordingly, so as to achieve an interference fit with the water pipe 4. The inner diameter of both ends of the elastic frame 3 is not less than the outer diameter of the water pipe 4. The end of the water pipe 4 can be easily inserted into both ends of the elastic frame 3. The connection between the diameter section 12 and the sleeve section 11 and the sealing section 13 is rounded. The rounded corner design on the anti-seepage sleeve joint 1 can reduce the stress concentration at the connection between the diameter section 12 and the sleeve section 11 and the sealing section 13, and ensure the pressure resistance of the anti-seepage sleeve joint 1.
[0020] The working principle of this technical solution is as follows: a pre-marked line is set on the water pipe 4 to confirm the insertion depth and position of the water pipe 4 in the anti-seepage sleeve joint 1, ensuring that the water pipe 4 is just squeezed into the middle of the elastic frame 3; Following the traditional bonding process, a special pipe adhesive is evenly applied to the outer sides of the two water pipes 4—corresponding to the coverage area of the anti-seepage sleeve joint 11. One pre-treated water pipe 4 is taken, and its end is aligned with the port of the sleeve joint 11 on one side of the anti-seepage sleeve joint 1. It is then slowly pushed in—at this point, the sealing gasket 2 is in an uncompressed state, its inner wall is flush with the inner wall of the sleeve joint 11, and the water pipe can smoothly pass through the sealing gasket 2 until the end of the water pipe 4 contacts one end of the elastic frame 3. The water pipe is then slowly pushed further in, causing it to press against the end of the elastic frame 3. As the water pipe goes deeper… The middle part of the elastic frame 3 is compressed and undergoes elastic deformation, increasing the minimum inner diameter. At the same time, due to the radial support of the sealing section 13, the length of the elastic frame extends to both sides, starting to compress the sealing gaskets 2 on both sides. The water pipe is continuously pushed until the preset marking line on the water pipe 4 is flush with one end of the anti-seepage sleeve joint 1. At this time, the deformation of the elastic frame 3 reaches the preset value. After being compressed, the length of the sealing gasket 2 decreases and the inner diameter shrinks, tightly fitting with the outside of the water pipe to achieve an interference fit. At the same time, the adhesive on the outside of the water pipe begins to contact the inner wall of the sleeve section 11, initially forming an adhesive fixation. Following the steps described above, align another pre-treated water pipe 4 with the port of the sleeve section 11 on the other side of the anti-seepage sleeve joint 1, and slowly push it in. Repeat the above operation. The elastic frame 3 exerts uniform pressure on the sealing gasket 2, forming a double anti-seepage structure of "adhesive fixing + elastic sealing".
[0021] 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. Specific examples have been used in this document to illustrate the principles and implementation methods of the invention; these examples are merely for the purpose of helping to understand the method and core ideas of the invention. The above descriptions are only preferred embodiments of the invention. It should be pointed out that, due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or variations can be made without departing from the principles of the invention, and the above technical features can be combined in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this invention.
Claims
1. A seepage prevention device for water supply and drainage pipes, characterized in that: The device includes a seepage-proof sleeve joint (1), which is composed of an integrally formed sleeve section (11), a reducing section (12), and a sealing section (13). The two ends of the sealing section (13) are connected to one end of the reducing section (12), and the other end of the reducing section (12) gradually connects to one end of the sleeve section (11). The sleeve section (11) is slidably fitted on the outside of the water pipe (4). The inner wall of the reducing section (12) is bonded and fixed with a sealing gasket (2). The two sealing gaskets (2) are attached to the two ends of the elastic frame (3) with their opposite ends. The elastic frame (3) and the water pipe (4) are interference fit.
2. The seepage prevention device for water supply and drainage pipes according to claim 1, characterized in that: When the sealing gasket (2) is not compressed by the elastic frame (3), the inner wall of the sealing gasket (2) is flush with the inner wall of the sleeve section (11).
3. The seepage prevention device for water supply and drainage pipes according to claim 1, characterized in that: The inner wall of the variable diameter section (12) has an outwardly convex curved structure.
4. The seepage prevention device for water supply and drainage pipes according to claim 1, characterized in that: The elastic frame (3) has an annular tube structure, and the inner diameter of the elastic frame (3) gradually increases from both ends to the middle.
5. A seepage prevention device for water supply and drainage pipes according to claim 1, characterized in that: The inner diameters at both ends of the elastic frame (3) are not less than the outer diameter of the water pipe (4).
6. The seepage prevention device for water supply and drainage pipes according to claim 1, characterized in that: The connection between the variable diameter section (12) and the sleeve section (11) and the sealing section (13) is rounded.