Prestressed corrugated pipe with multi-layer structure wall and low friction coefficient

Abstract

The utility model relates to the technical field of pipe structures, in particular to a multi-layer structure wall low-friction-coefficient prestress corrugated pipe which comprises a pipe body, a first connector and a second connector, the structure wall of the pipe body comprises an inner layer and at least one outer layer, the first connector is arranged at one end of the pipe body, and the second connector is arranged at the other end of the pipe body. The first connector of one pipe body is in butt joint with the second connector of the other pipe body. According to the utility model, a structure of adding a plurality of outer layers into the inner layer is adopted, and organic silicon materials are added into the inner layer framework in proportion, so that the friction coefficient between the prestressed tendons and the prestressed pipeline during prestressed tension is effectively reduced, the friction loss of the pipeline during prestressed tendons tension is reduced, strand pulling is easy, materials are saved, and the construction cost is reduced; the two corrugated pipes can be in butt joint by directly holding one corrugated pipe and inserting the corrugated pipe into the other corrugated pipe in a narrow space, multiple corrugated pipes are connected in sequence, connection is simpler, construction is more convenient, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe structure, in particular to a prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient. Background Art

[0002] Prestressed plastic corrugated pipes are mainly used in post-tensioned prestressed concrete and prestressed ducts. They have the advantages of good sealing, no water seepage and leakage, high ring stiffness, small friction parameters, aging resistance, electrical corrosion resistance, good flexibility, not easy to be broken by tamping rods, and new connection methods that make construction connection more convenient. They are mainly used in large-span tensioning projects such as roads, railways, bridges, slopes, and high-rise buildings. Reserve the inside of the corrugated pipe for later bundle threading. The existing prestressed plastic corrugated pipes all adopt a single-layer structure, that is, only a resin plastic layer, which has a high friction coefficient in the later bundle threading, troublesome construction, and low efficiency. The joints of the two sections of the existing prestressed plastic corrugated pipes are generally connected by tape wrapping and sealing, or fastened and docked by fasteners. The existing joint connection method is relatively cumbersome to construct, affecting work efficiency, and requires reserved pipe joints. It cannot work in a small space and cannot achieve automatic docking of pipes. Therefore, there is an urgent need to design a prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient to solve the problems of high friction coefficient of existing corrugated pipes and troublesome docking construction. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model aims to provide a prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a prestressed corrugated pipe with a multi-layer structural wall and a low friction coefficient, comprising a pipe body, a first joint and a second joint, the structural wall of the pipe body comprising an inner layer and an outer layer, the outer layer is provided with at least one layer, one end of the pipe body is provided with a first joint, the other end of the pipe body is provided with a second joint, and the first joint of the pipe body is butt-jointed with the second joint of the other pipe body.

[0005] Specifically, a plurality of guide grooves are provided on the first joint, and a positioning groove is provided near the middle of the pipe body.

[0006] Specifically, a guide slider is provided on the second joint, the position and quantity of the guide slider are matched with the guide groove, the guide slider slides in the guide groove, and a positioning protrusion is provided on the middle part of the guide slider away from the tube body, and the positioning protrusion is stuck in the positioning groove.

[0007] Specifically, the diameter of the first joint is smaller than the diameter of the second joint, and the outer diameter of the first joint and the inner diameter of the second joint are adapted to contact and butt with each other.

[0008] Specifically, the inner layer of the tube body is made of plastic material with organic silicon material added.

[0009] Specifically, the outer layer of the tube body is made of polymer resin material.

[0010] Specifically, the tube body is provided with large annular corrugations and small annular corrugations, and the large annular corrugations and the small annular corrugations are arranged at intervals.

[0011] The utility model has the following beneficial effects:

[0012] The prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient designed by the utility model adopts a structure of an inner layer plus multiple outer layers. Silicone materials are added to the inner layer structure in proportion to effectively reduce the friction coefficient between the prestressed tendons and the prestressed pipe during prestressing, reduce the friction loss of the pipe when the prestressed tendons are tensioned, facilitate bundle threading, save materials, and reduce engineering costs.

[0013] The utility model designs a prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient, so that the two corrugated pipes can be quickly and sealedly threaded together through the guide grooves and guide slide blocks of the butt joints arranged at both ends of the corrugated pipe. In a narrow space, the corrugated pipe can be directly inserted into another corrugated pipe for docking. Multiple bellows can be connected in sequence, which makes the connection simpler, the construction more convenient, and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the partial cross-sectional structure of a prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient.

[0015] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0016] Figure 3 yes Figure 1 Sectional view along AA direction.

[0017] Figure 4 yes Figure 1 Cross-sectional view along the BB axis.

[0018] Figure 5 is a top view of the first joint.

[0019] Figure 6 is a top view of the second joint.

[0020] In the figure: 1-tube body, 1.1 inner layer, 1.2-outer layer, 1.3-large annular corrugation, 1.4-small annular corrugation;

[0021] 2-first joint, 2.1-guide groove, 2.2-positioning groove;

[0022] 3-second joint, 3.1-guide slider, 3.2-positioning protrusion. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely further describe the technical solutions in the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1: The structural wall of the prestressed corrugated pipe with a multi-layer structure and a low friction coefficient adopts a double-layer structure.

[0025] like Figure 1-Figure 6 As shown, a prestressed corrugated pipe with a multi-layer structural wall and a low friction coefficient includes a pipe body 1, a first joint 2, and a second joint 3. The structural wall of the pipe body 1 includes an inner layer 1.1 and an outer layer 1.2. The outer layer 1.2 adopts a single-layer structure. The outer layer 1.2 of the pipe body 1 adopts a polymer resin material. The inner layer 1.1 of the pipe body 1.1 adopts a plastic material with added silicone material. The inner layer 1.1 and the outer layer 1.2 are integrally formed. The inner layer 1.1 structure is added with silicone material in proportion to effectively reduce the friction coefficient between the prestressed tendons and the prestressed pipe during prestressing, reduce the friction loss of the pipe when the prestressed tendons are stretched, and is easy to wear, save materials, and reduce engineering costs.

[0026] The pipe body 1 is provided with a large annular corrugation 1.3 and a small annular corrugation 1.4, which are arranged at intervals to increase the prestress of the corrugated pipe and make the corrugated pipe less likely to deform.

[0027] A first joint 2 is provided at one end of the pipe body 1, and a second joint 3 is provided at the other end of the pipe body 1. The first joint 2 of the pipe body 1 is butt-jointed with the second joint 3 of another pipe body.

[0028] The first joint 2 is provided with four guide grooves 2.1, which are arranged at intervals of 90 degrees. A positioning groove 2.2 is provided near the middle of the tube body 1 of the guide grooves 2.1.

[0029] The second joint 3 is provided with 4 guide sliders 3.1, which are matched with the guide grooves 2.1 in position and quantity. The 4 guide sliders 3.1 are arranged at intervals of 90°. When the two pipe bodies 1 are butted, the guide sliders 3.1 slide within the guide grooves 2.1 in a limited position. The middle of the guide slider 3.1 away from the pipe body 1 is provided with a positioning protrusion 3.2, which is inserted into the positioning groove 2.2 to achieve sealing and limiting, and the connection of the pipe body 1 is more stable. The coordinated use of the guide grooves 2.1 and the guide sliders 3.1 realizes the rapid sealing thread connection of the two corrugated pipes. In a narrow space, the corrugated pipe can be directly inserted into another corrugated pipe for butt connection. Multiple pipes can be connected in sequence, which makes the connection simpler, the construction more convenient, and the work efficiency improved.

[0030] The diameter of the first joint 2 is smaller than the diameter of the second joint 3 , and the outer diameter of the first joint 2 is adapted to contact and butt with the inner diameter of the second joint 3 .

[0031] Embodiment 2: A construction method of a corrugated pipe using the structural form of embodiment 1.

[0032] When the corrugated pipe of the utility model is butt-jointed, it is not necessary to rotate the pipe body 1 or to seal and wrap the outside of the pipe body 1. It is only necessary to apply plastic pipe glue to the outside of the first joint 2 of the front pipe body 1, and then apply plastic pipe glue to the inside of the second joint 3 of the rear pipe body 1, align the guide slider 3.1 on the rear pipe body 1 with the guide groove 2.1 on the front pipe body 1, and push the rear pipe body 1 forward. The positioning protrusion on the rear pipe body 1 slides into the positioning groove 2.2 on the front pipe body 1. At this time, the front and rear pipes are connected and butt-jointed in place.

[0033] The present utility model is not limited to the above-mentioned implementation modes, and anyone should be aware of the structural changes made under the inspiration of the present utility model. Any technical solutions that are the same or similar to the present utility model fall within the protection scope of the present utility model.

[0034] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient, characterized in that: It includes a tube body, a first joint and a second joint. The structural wall of the tube body includes an inner layer and an outer layer. The outer layer is provided with at least one layer. One end of the tube body is provided with a first joint, and the other end of the tube body is provided with a second joint. The first joint of the tube body is connected to the second joint of the other tube body.

2. The prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient according to claim 1, characterized in that: The first joint is provided with a plurality of guide grooves, and a positioning groove is provided near the middle of the tube body.

3. The prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient according to claim 2, characterized in that: The second joint is provided with a guide slider, which is matched with the position and number of the guide grooves. The guide slider slides in the guide grooves. A positioning protrusion is provided at the middle of the guide slider away from the tube body, and the positioning protrusion is stuck in the positioning groove.

4. The prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient according to claim 1, characterized in that: The diameter of the first joint is smaller than the diameter of the second joint, and the outer diameter of the first joint is adapted to contact and butt with the inner diameter of the second joint.

5. The prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient according to claim 1, characterized in that: The inner layer of the tube body is made of plastic material with organic silicon material added.

6. The prestressed corrugated pipe with a multi-layer structure wall and a low friction coefficient according to claim 1, characterized in that: The tube body is provided with large annular corrugations and small annular corrugations, and the large annular corrugations and the small annular corrugations are arranged at intervals.

Images