Bowl buckle type steel socket and spigot joint for non-excavation repair engineering of large-diameter water supply pipe

Abstract

The bowl buckle type steel socket and spigot joint comprises a first lining steel pipe pipeline and a second lining steel pipe pipeline which are adjacent to each other, and an included angle alpha is formed between the axis of the first lining steel pipe pipeline and the axis of the second lining steel pipe pipeline. The first lining steel pipe pipeline and the second lining steel pipe pipeline which are made of metal are provided with butt joint ends, the butt joint end of the first lining steel pipe pipeline is provided with a first bowl opening part, and the butt joint end of the second lining steel pipe pipeline is provided with a second bowl opening butt joint part matched with the first bowl opening part. According to the utility model, the requirement of repairing a pipeline with a corner characteristic in trenchless pipeline repairing construction can be met, and the installation and the butt joint are convenient.

Description

Technical Field

[0001] This utility model relates to the field of municipal construction technology, and in particular to a bowl-type steel socket joint for trenchless repair of large-diameter water supply pipes. Background Technology

[0002] Currently, the stable operation of large-diameter water supply pipes is crucial in urban water supply systems. However, over time, problems such as pipe aging and corrosion occur frequently, necessitating the replacement and repair of existing pipelines. Traditional open-cut repair methods are not only costly and time-consuming, but also severely impact traffic and the surrounding environment. Trenchless pipeline repair technology can overcome the drawbacks of traditional construction methods, but aging pipelines often experience settlement due to years of use, resulting in slight angular deviations between adjacent pipes. This presents a challenge for trenchless pipeline repair, primarily due to the large gaps between pipes with small angular deviations hindering welding. Utility Model Content

[0003] The present invention aims to solve the above-mentioned technical problems and provide a cup-type steel socket joint for trenchless repair of large-diameter water supply pipes, which can be adapted to municipal pipeline repair operations with small angular deviations and is convenient for welding.

[0004] To solve the above-mentioned technical problems, the present invention provides a cup-type steel socket joint for trenchless repair of large-diameter water supply pipes, which includes an adjacent first inner-lined steel pipe and a second inner-lined steel pipe. The axes of the first inner-lined steel pipe and the second inner-lined steel pipe have an angle α. The first inner-lined steel pipe and the second inner-lined steel pipe, both made of metal, have a butt joint. The butt joint of the first inner-lined steel pipe has a first cup-shaped opening, and the butt joint of the second inner-lined steel pipe has a second cup-shaped butt joint that mates with the first cup-shaped opening.

[0005] Furthermore, the range of α is 0° < α < 5°.

[0006] Furthermore, the lengths of the first and second inner-lined steel pipes are 3-6m.

[0007] Furthermore, the first bowl-shaped opening is integrally formed with the first inner steel pipe lining.

[0008] Furthermore, the second bowl-shaped joint is integrally formed with the second inner steel pipe.

[0009] Furthermore, the inner diameter of the first bowl-shaped opening gradually increases from the first inner lining steel pipe towards the free end of the first bowl-shaped opening, and then gradually decreases.

[0010] Furthermore, a rubber sleeve is provided on the surface of the first bowl opening.

[0011] Furthermore, the inner diameter of the second bowl-shaped joint gradually increases from the second inner lining steel pipe towards the free end of the second bowl-shaped joint.

[0012] The present invention has the following advantages: it can meet the needs of repairing pipelines with corner features in trenchless pipeline repair construction, and is easy to install and connect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a bowl-type steel socket joint used for trenchless repair of large-diameter water supply pipes.

[0014] Figure 2 for Figure 1 The separation state diagram.

[0015] Figure 3 This is a partial sectional view of a bowl-type steel socket joint used in trenchless repair projects for large-diameter water supply pipes. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] The present invention provides a cup-type steel socket joint for trenchless repair of large-diameter water supply pipes, comprising an adjacent first inner-lined steel pipe 1 and a second inner-lined steel pipe 2. Figure 1 The axis of the first inner-lined steel pipe 1 is horizontal, which can be understood as the normal horizontal laying state of municipal pipelines. However, the pipelines in large-diameter water supply networks are not straight due to geological conditions, surrounding buildings and other factors. At this time, the second inner-lined steel pipe, which is used for inner-lined repair, needs to be adapted to the repair work in a non-coaxial state with the first inner-lined steel pipe. The axes of the first inner-lined steel pipe 1 and the second inner-lined steel pipe 2 have an included angle α. Under normal circumstances, the maximum allowable angle of the cup-type steel socket joint is 5°. Therefore, the value of α is controlled within the range of 0° < α < 5°. The first inner-lined steel pipe and the second inner-lined steel pipe, which are made of metal, have a butt end. The butt end of the first inner-lined steel pipe has a first cup-shaped part 3, and the butt end of the second inner-lined steel pipe has a second cup-shaped butt end 4 that matches the first cup-shaped part 3. The first cup-shaped part needs to be built into the second cup-shaped butt end. Therefore, the shape of the second cup-shaped butt end needs to match the shape of the first cup-shaped part. Due to their unique structural design, even if two adjacent pipes have a certain angle, it does not affect the need for repair work between them.

[0018] As an option, the lengths of the first and second inner-lined steel pipes are 3-6 meters. Based on the actual conditions inside the original pipe, inner-lined steel pipe sections of 3-6 meters in length are placed into the working shaft. This preparatory work fully considers the actual conditions of the construction site and the convenience of pipeline transportation. Shorter pipe sections facilitate operation within the limited space of the working shaft, reducing construction difficulty. Subsequently, the inner-lined steel pipes are pulled section by section to the designated positions within the original pipeline using a traction device. The entire process is simple, efficient, and reduces construction time and labor costs.

[0019] Due to the special nature of the materials of the two adjacent inner-lined steel pipes, integral stamping and other methods can be used to meet the requirements of integral molding. This can reduce processing costs and improve the structural strength between the bowl and the pipe. This allows for the integral molding of the first bowl with the first inner-lined steel pipe and the second bowl with the second inner-lined steel pipe, and also facilitates large-scale manufacturing in the prefabrication plant, ensuring the stability of on-site construction quality.

[0020] from Figure 3 As can be seen, the inner diameter of the first bowl is gradually changing. The gradual change is as follows: the inner diameter of the first bowl gradually increases from the first inner lining steel pipe towards the free end of the first bowl, and then gradually decreases. This structure gives the first bowl a rounded, convex shape, which allows it to maintain good contact performance even when it deflects at a small angle within the second bowl's mating part. The inner diameter of the second bowl's mating part gradually increases from the second inner lining steel pipe towards the free end of the second bowl's mating part. This way, even after the first bowl is installed inside the second bowl's mating part, it can prevent separation during mutual deflection and movement.

[0021] Of course, a groove can be formed around the surface of the first bowl portion 3, and a rubber sleeve can be distributed in the groove. The width of the rubber sleeve is controlled to be 0.5cm, and the surface curvature of the rubber sleeve is approximately the same as that of the first bowl portion, so that the surface of the rubber sleeve of the first bowl portion is roughly flush with the surface of the first bowl portion. After the entire structure is installed in place, the rubber sleeve can expand to a certain extent under thermal expansion and fit tightly against the inner surface of the second bowl portion joint, so as to further improve the sealing performance between them. When it is not expanded, the approximate size and depth of the first bowl portion inserted into the second bowl portion can still be judged by the rubber sleeve when it is evenly distributed vertically. When the rubber sleeve is distributed obliquely (e.g. Figure 3 The rubber sleeves are distributed parallel to the second bowl-shaped port. This allows for a more general assessment of whether the installation position of the two bowl-shaped ports meets expectations after they are joined together (if part of the rubber sleeve is exposed at the second bowl-shaped port, it indicates that the installation offset angle between them does not meet the preset requirements).

[0022] This invention enables the formation of an ideal coaxial lining within the steel pipe, which is crucial for ensuring the normal operation of the repaired pipeline. The cup-lock steel socket joint, with its precise design and manufacturing process, guarantees that each section of the lining steel pipe is accurately positioned during installation, maintaining excellent coaxiality with the original pipeline. This tightly fitting "full-structure" not only enhances the overall strength of the pipeline but also effectively prevents turbulence within the pipe, reducing head loss and ensuring the stability and efficiency of the water supply.

[0023] During construction, after the pipes are pulled into place, a cup-lock steel socket joint is used for connection and installation. Its unique connection method allows for the rapid and secure connection of each section of the inner steel lining, forming a safe and reliable new pipeline structure. This connection method not only improves construction efficiency, but the high strength and sealing of the joints also ensure the stability and reliability of the new pipeline during long-term operation, effectively solving the technical challenges of trenchless repair of ultra-large diameter pipelines.

[0024] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A bell and spigot joint of steel for use in trenchless rehabilitation works of large diameter water supply pipes, comprising an adjacent first inner lining steel pipe conduit and a second inner lining steel pipe conduit, the axes of the first inner lining steel pipe conduit and the second inner lining steel pipe conduit having an included angle a, characterised in that, The first inner lining steel pipe and the second inner lining steel pipe made of metal have butt ends, wherein the butt end of the first inner lining steel pipe has a first bowl mouth part, the butt end of the second inner lining steel pipe has a second bowl mouth butt part matched with the first bowl mouth part, and the value range of α is 0°<α<5°.

2. The bell and spigot joint of steel for trenchless rehabilitation of large diameter water mains according to claim 1, characterized in that, The surface of the first bowl mouth part is provided with a rubber sleeve.

3. The bell and spigot joint of steel for trenchless rehabilitation of large diameter water mains according to claim 1, characterized in that, The length of the first inner lining steel pipe and the second inner lining steel pipe is 3-6 m.

4. The bell and spigot joint of steel for trenchless rehabilitation of large diameter water mains according to claim 1, characterized in that, The first bowl mouth part is integrally formed with the first inner lining steel pipe.

5. The bell and spigot joint of steel for trenchless rehabilitation of large diameter water mains according to claim 1, characterized in that, The second bowl mouth butt part is integrally formed with the second inner lining steel pipe.

6. The bell and spigot joint of steel for trenchless rehabilitation of large diameter water mains according to claim 1, characterized in that, The inner diameter of the first bowl mouth part gradually increases first and then gradually decreases from the first inner lining steel pipe to the free end of the first bowl mouth part.

7. The bell and spigot joint of steel for trenchless rehabilitation of large diameter water mains according to claim 1, characterized in that, The inner diameter of the second bowl mouth butt part gradually increases from the second inner lining steel pipe to the free end of the second bowl mouth butt part.

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