Prestress corrugated pipe spiral joint with continuous corrugations

Abstract

The utility model relates to the technical field of pipe connecting structures, and particularly discloses a continuous corrugated prestressed corrugated pipe screw joint, which comprises a first pipe body, a second pipe body and a screw joint, the first pipe body and the second pipe body adopt corrugated pipes with the same structure, and one end of each of the first pipe body and the second pipe body is provided with an internal thread pipe. The other end of the first pipe body and the other end of the second pipe body are each provided with an outer threaded pipe, the inner threaded pipe of the first pipe body is in threaded connection with the outer threaded pipe of the second pipe body, and the inner threaded pipe and the outer threaded pipe are connected to form a spiral connector for mutual connection between corrugated pipes. The inner threaded pipe and the outer threaded pipe which are arranged at the two ends of the corrugated pipe are quickly connected, the upper corrugated pipe is directly held by a hand to be screwed and tightened in a narrow space so that butt joint can be achieved, multiple corrugated pipes can be connected in sequence, connection is simpler, construction is more convenient, working efficiency is improved, the stop ring and the sealing ring are arranged inside to control the screwing-in depth of the inner threaded pipe, and the service life of the corrugated pipe is prolonged. The sealing effect is improved, and risks caused by water seepage and slurry leakage of the pipeline are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe connection structures, in particular to a continuous corrugated prestressed corrugated pipe spiral joint. Background Art

[0002] Prestressed plastic corrugated pipe is a key material used in prestressed concrete structures. It protects the prestressed tendons from corrosion by the concrete and provides a path for the tendons to be tensioned. Prestressed plastic corrugated pipe is typically made from plastic materials such as high-density polyethylene (HDPE) or polypropylene (PP). Its corrugated shape increases the rigidity and compressive strength of the pipe wall.

[0003] Prestressed plastic corrugated pipe is primarily used for post-tensioned prestressed concrete and for forming prestressed ducts. It boasts excellent sealing, no water seepage or leakage, high hoop stiffness, low friction parameters, resistance to aging and electrical corrosion, good elasticity, resistance to tamping rods, and new connection methods that facilitate construction. It is primarily used in large-span tensioning projects such as roads, railways, bridges, slopes, and high-rise buildings. Existing prestressed plastic corrugated pipe joints typically use tape wrapping to seal the two sections or fasteners to connect them. Both of these connection methods are cumbersome to construct, affecting work efficiency. They also require pre-reserved pipe joints, making them impractical in confined spaces and preventing automatic pipe docking. Another type of connection utilizes screw joints. However, existing screw joints, due to the large gaps between the threads, lack effective sealing, posing the risk of water seepage and leakage, which reduces the pipe's bearing capacity and safety performance. Therefore, there is an urgent need to design a prestressed bellows spiral joint with continuous corrugations to solve the problems of cumbersome construction work and loose joint sealing of existing bellows connections. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a prestressed corrugated pipe spiral joint with continuous corrugation.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a continuous corrugated prestressed corrugated pipe spiral joint, comprising a first pipe body, a second pipe body and a spiral joint, the first pipe body and the second pipe body adopt corrugated pipes of the same structure, one end of the first pipe body and the second pipe body are respectively provided with an internal threaded pipe, and the other end of the first pipe body and the second pipe body are respectively provided with an external threaded pipe, the internal threaded pipe of the first pipe body is threadedly connected to the external threaded pipe of the second pipe body, and the internal threaded pipe and the external threaded pipe are connected to form a spiral joint connecting the corrugated pipes with each other.

[0006] Specifically, both ends of the first tube body are integrally formed with an external threaded tube and an internal threaded tube, and both ends of the second tube body are integrally formed with an external threaded tube and an internal threaded tube.

[0007] Specifically, the first tube body and the second tube body are both provided with spiral corrugations and tube walls. The outer side of the tube wall is provided with convex spiral corrugations, and the spiral corrugations form spiral grooves on the inner side of the tube wall.

[0008] Specifically, a stop ring is provided on the inner side of the external threaded tube, which is located at the connection between the external threaded tube and the tube wall. A sealing ring is installed on the stop ring. The stop ring and the sealing ring are sealed at the front end of the internal threaded tube screwed into the external threaded tube.

[0009] Specifically, the internal threaded pipe is provided with an internal thread, the external threaded pipe is provided with an external thread that matches the internal thread, and the internal threaded pipe and the external threaded pipe are threadedly connected via the internal thread and the external thread.

[0010] Specifically, the diameter of the internal threaded pipe is smaller than the diameter of the external threaded pipe, and the external threaded pipe is sleeved on the outside of the internal threaded pipe.

[0011] Specifically, the first tube body and the second tube body are both round tubes made of plastic.

[0012] The utility model has the following beneficial effects:

[0013] The continuous corrugated prestressed corrugated pipe spiral joint designed by the utility model is quickly connected through the internal threaded pipe and the external threaded pipe arranged at both ends of the corrugated pipe. In a narrow space, the upper corrugated pipe can be directly held by hand and rotated and tightened to connect. Multiple pipes can be connected in sequence, which makes the connection simpler, the construction more convenient, and the work efficiency is improved.

[0014] The connection of the continuous corrugated prestressed bellows spiral joint designed by the utility model has a double-layer structure to ensure that the prestressed bellows does not deform. A stop ring and a sealing ring are provided inside to control the screw-in depth of the internal threaded pipe, thereby improving the sealing effect and avoiding the risk of water seepage and leakage in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the connection state of a continuous corrugated prestressed bellows spiral joint.

[0016] Figure 2 It is a cross-sectional view of the connection state of a continuous corrugated prestressed bellows spiral joint.

[0017] In the figure: 1-first tube body, 1.1-spiral corrugation, 1.2-spiral groove, 1.3-tube wall;

[0018] 2-second tube body; 3-inner threaded tube; 4-external threaded tube; 5-inner thread; 6-external thread; 7-stop ring; 8-sealing ring. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely further describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 2 As shown, a continuous corrugated prestressed corrugated pipe spiral joint includes a first pipe body 1, a second pipe body 2 and a spiral joint. The first pipe body 1 and the second pipe body 2 adopt the same structure of continuous corrugated corrugated pipes. The first pipe body 1 and the second pipe body 2 are both provided with spiral corrugations 1.1 and pipe walls 1.3. The outer side of the pipe wall 1.3 is provided with convex spiral corrugations 1.1, and the spiral corrugations 1.1 form spiral grooves 1.2 on the inner side of the pipe wall 1.3.

[0021] The first tube body 1 and the second tube body 2 are both round tubes made of plastic.

[0022] An external threaded tube 4 and an internal threaded tube 3 are integrally formed at both ends of the first tube body 1 , and an external threaded tube 4 and an internal threaded tube 3 are integrally formed at both ends of the second tube body 2 .

[0023] One end of the first tube body 1 and the second tube body 2 is provided with an internal threaded tube 3, and the other end of the first tube body 1 and the second tube body 2 is provided with an external threaded tube 4. The internal threaded tube 3 of the first tube body 1 is threadedly connected to the external threaded tube 4 of the second tube body 2, and the internal threaded tube 3 and the external threaded tube 4 are connected to form a spiral joint connecting the corrugated tubes.

[0024] The internal threaded pipe 3 is provided with an internal thread 5 , and the external threaded pipe 4 is provided with an external thread 6 that matches the internal thread 5 . The internal threaded pipe 3 and the external threaded pipe 4 are threadedly connected via the internal thread 5 and the external thread 6 .

[0025] The diameter of the internal threaded pipe 3 is smaller than that of the external threaded pipe 4, and the external threaded pipe 4 is sleeved on the outside of the internal threaded pipe 3. The internal threaded pipe 3 and the external threaded pipe 4 set at both ends of the corrugated pipe are quickly connected. In a narrow space, you can directly hold the upper corrugated pipe by hand and rotate and tighten it to connect them. Connecting multiple pipes in sequence makes the connection simpler, the construction more convenient, and the work efficiency is improved.

[0026] A stop ring 7 is provided on the inner side of the external threaded tube 4, and the stop ring 7 is located at the connection between the external threaded tube 4 and the tube wall 1.3. A sealing ring 8 is installed on the stop ring 7. The stop ring 7 and the sealing ring 8 are sealed at the front end of the internal threaded tube 3 screwed into the external threaded tube 4. A stop ring 7 and a sealing ring 8 are provided inside to control the screw-in depth of the internal threaded tube 3, thereby improving the sealing effect and avoiding the risk of water seepage and leakage in the pipeline.

[0027] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware of the structural changes made under the inspiration of the present invention. Any technical solution that is the same or similar to the present invention falls within the scope of protection of the present invention.

[0028] The technology, shape and structure that are not described in detail in this utility model are all well-known technologies.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous corrugated prestressed corrugated pipe spiral joint, characterized in that: The invention comprises a first tube body, a second tube body and a spiral joint, wherein the first tube body and the second tube body adopt a bellows with the same structure, one end of the first tube body and the second tube body is provided with an internal threaded tube, and the other end of the first tube body and the second tube body is provided with an external threaded tube, the internal threaded tube of the first tube body is threadedly connected to the external threaded tube of the second tube body, and the internal threaded tube and the external threaded tube are connected to form a spiral joint connecting the bellows; The first tube body and the second tube body are both provided with spiral corrugations and tube walls. The outer side of the tube wall is provided with convex spiral corrugations, and the spiral corrugations form spiral grooves on the inner side of the tube wall. A stop ring is provided on the inner side of the externally threaded tube, and the stop ring is located at the connection between the externally threaded tube and the tube wall. A sealing ring is installed on the stop ring. The stop ring and the sealing ring are sealed at the front end of the internally threaded tube screwed into the interior of the externally threaded tube.

2. The continuous corrugated prestressed bellows spiral joint according to claim 1, characterized in that: An external threaded tube and an internal threaded tube are integrally formed at both ends of the first tube body, and an external threaded tube and an internal threaded tube are integrally formed at both ends of the second tube body.

3. The continuous corrugated prestressed bellows spiral joint according to claim 1, characterized in that: The internal threaded pipe is provided with an internal thread, the external threaded pipe is provided with an external thread matched with the internal thread, and the internal threaded pipe and the external threaded pipe are threadedly connected via the internal thread and the external thread.

4. The continuous corrugated prestressed bellows spiral joint according to claim 1, characterized in that: The diameter of the internal threaded pipe is smaller than that of the external threaded pipe, and the external threaded pipe is sleeved on the outside of the internal threaded pipe.

5. The continuous corrugated prestressed corrugated pipe spiral joint according to claim 1, characterized in that: The first tube body and the second tube body are both round tubes made of plastic.

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