Sealing structure for butt joint of PVC pipes

Abstract

The utility model relates to the technical field of pipeline butt-joint sealing, in particular to a PVC pipe butt-joint sealing structure which comprises a first butt-joint pipe and a second butt-joint pipe, one end of the first butt-joint pipe is arranged on the outer side of the second butt-joint pipe in a sleeved mode, and the pipe wall of the end, close to the second butt-joint pipe, of the first butt-joint pipe protrudes outwards to form an outer protruding ring. The number of the outer protruding rings is two, sealing rings are arranged on the inner sides of the two outer protruding rings, wedge-shaped bodies embedded into the inner sides of the outer protruding rings are arranged on the sealing rings, two detachable lining rings corresponding to the outer protruding rings in position are arranged on the inner sides of the sealing rings, and containing ring grooves of the lining rings are formed in the inner sides of the sealing rings. And the sealing ring and the lining ring are arranged between the outer convex ring of the first butt joint pipe and the second butt joint pipe. The sealing device is reasonable in structure, achieves the advantages of being high in sealing performance, high in stability, convenient to maintain and long in service life through the innovative design, is suitable for various industrial and life scenes, and has remarkable economical efficiency and practicability.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for pipe connections, specifically to a sealing structure for PVC pipe connections. Background Technology

[0002] PVC pipes are widely used in piping systems due to their advantages such as corrosion resistance, light weight, and low cost. However, the sealing performance of pipe joints directly affects the reliability and safety of the entire system. Traditional PVC pipe joint sealing methods mainly include: adhesive bonding: using special adhesive to bond two PVC pipes together; rubber sealing rings: installing rubber sealing rings at the pipe joints, relying on compression of the sealing rings to achieve a seal; threaded connections: tightening two pipes through a threaded structure, combined with sealing tape or sealant to achieve a seal.

[0003] Existing PVC pipe joint sealing methods often have the following problems:

[0004] 1. Insufficient sealing performance

[0005] Adhesive bonding: The sealing effect of adhesive bonding depends on the quality of the adhesive and the construction process. Problems such as uneven application or aging and failure of the adhesive can easily occur, leading to leakage.

[0006] Rubber seals: Traditional rubber seals are prone to losing elasticity due to compression deformation or aging during long-term use, resulting in a decline in sealing performance. Threaded connections: Threaded connections are prone to loosening due to vibration or temperature changes, and sealing tape or sealant may also age and fail.

[0007] 2. Poor structural stability

[0008] Traditional sealing methods lack effective support structures, and pipe connections are prone to loosening or displacement when subjected to external forces such as vibration or pressure fluctuations, leading to seal failure.

[0009] Adhesive bonding and threaded connections have low structural strength and cannot withstand large axial or radial forces.

[0010] 3. Difficult to maintain

[0011] Adhesive bonding: Once the adhesive fails, the pipe needs to be cut and re-bonded, which is costly and complicated to maintain.

[0012] Rubber sealing rings: Traditional sealing rings are difficult to remove and replace after installation, and maintenance is inconvenient;

[0013] Threaded connections: Disassembling and reinstalling threaded connections requires special tools, and sealing tape or sealant needs to be reapplied, increasing the difficulty of maintenance.

[0014] Existing PVC pipe butt sealing methods suffer from drawbacks such as insufficient sealing performance, poor structural stability, difficult maintenance, poor adaptability, and short service life. These problems affect the reliability and safety of the piping system, increasing maintenance costs and operational risks.

[0015] Therefore, a new type of sealing structure is urgently needed to solve the above problems and improve the sealing performance, stability and service life of pipeline connections. Utility Model Content

[0016] The present invention aims to solve the technical problems existing in the prior art and provides a sealing structure for PVC pipe connection.

[0017] A sealing structure for PVC pipe connection includes a first pair of connecting pipes and a second pair of connecting pipes. One end of the first pair of connecting pipes is sleeved on the outside of the second pair of connecting pipes. The pipe wall of the first pair of connecting pipes near the end of the second pair of connecting pipes protrudes outward to form an outer convex ring. There are two outer convex rings. A sealing ring is provided on the inner side of the two outer convex rings. A wedge-shaped body is provided on the sealing ring to be embedded in the inner side of the outer convex ring. Two removable inner liner rings corresponding to the position of the outer convex rings are provided on the inner side of the sealing ring. A receiving ring groove for the inner liner rings is provided on the inner side of the sealing rings. The sealing rings and inner liner rings are located between the outer convex rings of the first pair of connecting pipes and the second pair of connecting pipes.

[0018] Furthermore, the sealing ring is made of soft rubber and has an elastic support angle on the inner side.

[0019] Compared with the prior art, the present invention has the following advantages: The present invention has a reasonable structure and achieves the advantages of high sealing performance, strong stability, convenient maintenance and long service life through innovative design. It is suitable for a variety of industrial and life scenarios and has significant economic and practical benefits.

[0020] Excellent sealing performance: Multiple sealing design: Through the combination of sealing rings, wedges and elastic support angles, multiple sealing barriers are formed to effectively prevent liquid or gas leakage;

[0021] The inner liner is an elastic ring, which is located in the receiving annular groove to enable the sealing ring to be effectively embedded in the outer convex ring, providing rigid support and maintaining stability to prevent the sealing ring from shifting.

[0022] Elastic support angle: The elastic support angle inside the sealing ring provides additional elastic force during compression, ensuring that the sealing ring fits tightly against the surface of the second pair of pipes, further enhancing the sealing effect. In addition, the elastic support angle allows the sealing ring to adapt to minor deformations or vibrations of the pipeline, maintaining a long-term sealing effect.

[0023] Removable inner liner: The inner liner is designed to be removable, which facilitates the installation and replacement of the seal ring and reduces maintenance costs;

[0024] Wedge-shaped fixing: The wedge-shaped part on the sealing ring is embedded in the inner side of the outer convex ring, which simplifies the installation process and helps to ensure that the sealing ring is firmly fixed;

[0025] Soft rubber material: The sealing ring is made of soft rubber, which has good elasticity and corrosion resistance, and can adapt to different working environments, such as high temperature, high pressure or corrosive media;

[0026] Wide range of applications: This structure is suitable for a variety of scenarios, such as water supply and drainage systems, chemical pipelines, gas transmission pipelines, etc., and can meet the sealing requirements under different working conditions;

[0027] Extended service life: The design of the inner liner and elastic support angle reduces direct wear on the sealing ring, extending the service life of the sealing structure. The soft rubber material has good anti-aging properties and can maintain elasticity during long-term use. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a sealing structure for PVC pipe connection according to this utility model;

[0029] Figure 2 This is a schematic diagram of the uncompressed state of the sealing ring of a sealing structure for PVC pipe connection according to this utility model.

[0030] As shown in the figure: 1. First pair of pipes; 2. Second pair of pipes; 3. Outer convex ring; 4. Sealing ring; 5. Wedge-shaped body; 6. Inner liner; 7. Receiving ring groove; 8. Elastic support angle. Detailed Implementation

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In the description of the embodiments of this utility model, if a feature is referred to as "setting", "fixing", "connecting", or "installing" on another feature, it can be set, fixed, or connected directly to the other feature, or it can be set, fixed, connected, or installed indirectly on the other feature.

[0034] In the description of the embodiments of this utility model, the term "several" means one or more, and the term "multiple" means two or more. The terms "greater than," "less than," and "exceeding" should be understood as excluding the stated number, while the terms "above," "below," and "within" should be understood as including the stated number. The terms "first" and "second" should be understood as distinguishing technical features and not as indicating or implying relative importance, the number of indicated technical features, or the order of the indicated technical features.

[0035] The following description, with reference to the accompanying drawings, illustrates an embodiment of the present invention using a dual-cylinder high-pressure pump as an example.

[0036] A sealing structure for PVC pipe connection includes a first pair of connecting pipes 1 and a second pair of connecting pipes 2. One end of the first pair of connecting pipes 1 is sleeved on the outside of the second pair of connecting pipes 2. The pipe wall of the first pair of connecting pipes 1 near the end of the second pair of connecting pipes 2 protrudes outward to form an outer convex ring 3. There are two outer convex rings 3. A sealing ring 4 is provided on the inner side of the two outer convex rings 3. A wedge-shaped body 5 is provided on the sealing ring 4 and embedded in the inner side of the outer convex ring 3. Two detachable inner lining rings 6 are provided on the inner side of the sealing ring 4 and corresponding to the position of the outer convex ring 3. A receiving ring groove 7 for the inner lining ring 6 is provided on the inner side of the sealing ring 4. The sealing ring 4 and the inner lining ring 6 are located between the outer convex ring 3 of the first pair of connecting pipes 1 and the second pair of connecting pipes 2.

[0037] The sealing ring 4 is made of soft rubber and has an elastic support angle 8 on its inner side.

[0038] When connecting the first pair of connectors 1 and the second pair of connectors 2, the specific steps are as follows:

[0039] S1. Install the inner liner: Place the inner liner 6 into the receiving ring groove 7 inside the sealing ring 4, ensuring that the inner liner is fully embedded in the receiving ring groove and fits tightly with the sealing ring.

[0040] S2. Install the sealing ring: Embed the sealing ring 4 into the inner side of the outer convex ring 3 of the first connecting pipe 1. Align the wedge 5 on the sealing ring 4 with the inner side of the outer convex ring 3. Gently press the sealing ring to embed the wedge into the inner side of the outer convex ring, ensuring that the sealing ring is firmly fixed.

[0041] S3. Connect the pipes by fitting the first pair of pipes 1 over the outside of the second pair of pipes 2, securing the first pair of pipes 1, forcefully inserting the second pair of pipes 2 into the first pair of pipes 1, and slowly pushing the second pair of pipes 2. During the movement, the sealing ring 4 will be compressed, and the elastic support angle 8 will provide additional elastic force to ensure that the sealing ring is tightly fitted to the surface of the second pair of pipes. Continue pushing the second pair of pipes until it can no longer be pushed, thus completing the sealing connection of the first pair of pipes 1 and the second pair of pipes 2.

[0042] This utility model's sealing structure for PVC pipe connections achieves high sealing performance, strong stability, and convenient maintenance through innovative design. Its multiple sealing features, flexible support angles, removable inner liner, and the use of soft rubber material make it highly economical and practical in various industrial and domestic scenarios. Whether for water supply and drainage systems, chemical pipelines, or gas transmission pipelines, this structure can meet the sealing requirements under different operating conditions, providing an efficient and reliable pipe connection solution.

[0043] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A sealing structure for PVC pipe joints, characterized in that: The device includes a first pair of connectors and a second pair of connectors. One end of the first pair of connectors is fitted onto the outside of the second pair of connectors. The pipe wall of the first pair of connectors near the end of the second pair of connectors protrudes outward to form an outer convex ring. There are two outer convex rings. A sealing ring is provided on the inner side of the two outer convex rings. A wedge-shaped body is provided on the sealing ring to be embedded in the inner side of the outer convex ring. Two removable inner liner rings corresponding to the position of the outer convex rings are provided on the inner side of the sealing rings. A receiving ring groove for the inner liner rings is provided on the inner side of the sealing rings. The sealing rings and inner liner rings are located between the outer convex rings of the first pair of connectors and the second pair of connectors.

2. The sealing structure for PVC pipe jointing according to claim 1, characterized in that: The sealing ring is made of soft rubber and has an elastic support angle on the inner side.

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