Corrosion-resistant PVC double-wall corrugated pipe

Abstract

The utility model discloses a corrosion-resistant PVC (polyvinyl chloride) double-wall corrugated pipe which comprises a double-wall corrugated pipe main body, and the double-wall corrugated pipe main body comprises an inner-layer corrugated pipe and an outer-layer corrugated pipe; the inner-layer corrugated pipe comprises a plurality of first arc-shaped rings which are integrally formed; the outer-layer corrugated pipe comprises a plurality of second arc-shaped rings which are integrally formed; the first arc-shaped rings and the second arc-shaped rings are the same in size, and the distance between every two adjacent first arc-shaped rings is smaller than that between every two adjacent second arc-shaped rings. Or, the interval between every two adjacent first arc-shaped rings is consistent, the interval between every two adjacent second arc-shaped rings is consistent, and the radian of the first arc-shaped rings is smaller than that of the second arc-shaped rings; and a framework layer is arranged between the inner-layer corrugated pipe and the outer-layer corrugated pipe. Due to the arrangement of the first arc-shaped ring and the second arc-shaped ring, the bending of the bending device can be facilitated, and after the bending, due to the arrangement of the framework layer, the bending limiting of the bending device can be facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of building accessories, and in particular relates to a corrosion-resistant PVC double-wall corrugated pipe. Background Art

[0002] A bellows is a tubular elastic sensitive element formed by connecting foldable corrugated sheets along the folding and stretching direction. It is widely used in water conservancy and the like for drainage or connecting channels. However, the existing bellows is single-layer and has poor strength. It can also be made into a bellows structure with a thicker outer wall, but due to the thicker inner wall, the outer wall is easy to break when bending, affecting its use. In addition, the two ends of the existing bellows are mostly connected by means of clamps, etc., and additional bolts for fixing the clamps need to be installed, etc., which makes the installation not very convenient. Therefore, it is very important to obtain a corrosion-resistant PVC double-wall corrugated pipe that overcomes the above defects. Utility Model Content

[0003] In order to solve at least one of the above technical problems, the utility model provides a corrosion-resistant PVC double-wall corrugated pipe, including a double-wall corrugated pipe body, wherein the double-wall corrugated pipe body includes an inner layer corrugated pipe and an outer layer corrugated pipe;

[0004] The inner layer bellows comprises a plurality of first arc-shaped rings formed in one piece;

[0005] The outer layer bellows comprises a plurality of second arc-shaped rings formed integrally;

[0006] The first arc-shaped circle and the second arc-shaped circle are of the same size, and the distance between two adjacent first arc-shaped circles is smaller than the distance between two adjacent second arc-shaped circles; or,

[0007] The intervals between two adjacent first arc circles are consistent, the intervals between two adjacent second arc circles are consistent, and the curvature of the first arc circle is smaller than that of the second arc circle;

[0008] The outer layer of the corrugated pipe is coated with an anti-corrosion layer;

[0009] A skeleton layer is provided between the inner and outer corrugated tubes, a first connecting ring is formed at both ends of the inner corrugated tube, a second connecting ring is formed at both ends of the outer corrugated tube, and a third connecting ring is formed at both ends of the skeleton layer. The third connecting ring is clamped and fixed between the two first and second connecting rings located on the same side.

[0010] Through the above technical solution, the provision of the first arcuate ring and the second arcuate ring can facilitate the bending of the utility model, and after bending, the provision of the skeleton layer can facilitate the bending limitation of the utility model.

[0011] The double-wall corrugated pipe structure has good sealing performance and extends service life.

[0012] As a preferred embodiment of the above, the skeleton layer includes a plurality of continuous M-shaped connectors, which have better strength.

[0013] As a preferred embodiment of the above, the skeleton layer is a steel belt or a metal mesh.

[0014] As a preferred embodiment of the above, PVC is filled between the inner wall of the outer layer corrugated pipe and the outer wall of the inner layer corrugated pipe, and the skeleton layer is placed in the filled PVC.

[0015] As a preferred embodiment of the above, the curvature of the M-shaped connector is between the first arc circle and the second arc circle, which facilitates the bending of the utility model.

[0016] As a preferred embodiment of the above, the inner wall of the inner layer corrugated tube is a plane or a plurality of connected arc surfaces, and the curvature of the arc surface is greater than the outer wall of the inner layer corrugated tube.

[0017] The inner wall of the inner corrugation has a smooth plane, such as a cylindrical or slightly curved arc surface, which can prevent objects from getting stuck and prevent clogging.

[0018] As a preferred embodiment of the above, the double-walled corrugated pipe body has connecting parts formed on both sides, and also includes an inner connecting part and an outer connecting part threadedly connected to the outer side of the inner connecting part, the outer side of the connecting part is provided with threads matching with the inner connecting part, the inner connecting part is threadedly connected to the outer wall of the connecting part, a rubber ring protruding outward is fixed to the outer wall between the connecting part and the double-walled corrugated pipe body, a groove matching with the rubber ring is provided on the inner wall of the outer connecting part, a first inclined surface is provided at the inner wall end of the outer connecting part, and the groove squeezes the rubber ring to achieve a sealed connection. Wherein, the outer wall or inner wall of the inner connecting part is formed with threads connected to other parts.

[0019] The utility model simplifies the installation process by threading the inner connecting piece and the outer connecting piece.

[0020] Compared with the prior art, the advantages of the utility model are: the utility model has a simple structure, good bending and bending limiting effects, due to the different curvatures inside and outside, the outer wall is not easy to stretch and break when bending, and is equipped with a connector with strong sealing properties, that is, an internal connector and an external connector, which is convenient for installation and connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A side cross-section diagram of an embodiment of the utility model Figure 1 ;

[0022] Figure 2 This is a side cross-sectional diagram of the second embodiment of the utility model. Figure 2 ;

[0023] Figure 3This is a schematic diagram of the utility model being put into use. Figure 1 ;

[0024] Figure 4 This is a schematic diagram of the utility model being put into use. Figure 2 ;

[0025] Reference numerals:

[0026] 1 double-walled corrugated pipe body; 2 inner layer corrugated pipe; 201 first outer wall; 202 first thickness wall; 203 first arc ring; 3 outer layer corrugated pipe; 301 second outer wall; 302 second thickness wall; 303 second arc ring; 4 skeleton layer; 5 first connecting ring; 6 second connecting ring; 7 third connecting ring; 8 arc surface; 9 connecting part; 10 inner connecting piece; 11 outer connecting piece; 12 groove; 13 first inclined surface; 14 rubber ring. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the present invention and to more clearly define the scope of protection claimed by the present invention, the present invention is described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementation methods of the present invention, which are only part of the embodiments of the present invention, and the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and the specific features do not naturally and directly limit the scope of implementation of the present invention.

[0028] Referring to the attached drawings, the utility model adopts the following technical scheme: a corrosion-resistant PVC double-wall corrugated pipe, comprising a double-wall corrugated pipe body 1, wherein the double-wall corrugated pipe body 1 comprises an inner layer corrugated pipe 2 and an outer layer corrugated pipe 3;

[0029] The inner layer corrugated tube 2 includes a plurality of integrally formed first arc circles 203 ; the first arc circle 203 is a first outer wall 201 , and there is a first thickness wall 202 integrally formed with the first outer wall 201 , and the density of the first outer wall 201 is higher than or equal to the density of the first thickness wall 202 .

[0030] The outer layer bellows 3 includes a plurality of second arc circles 303 formed integrally; the second arc circle 303 is a second outer wall 301, and a second thickness wall 302 formed integrally with the second outer wall 301, and the density of the second outer wall 301 is higher than or equal to the density of the second thickness wall 302, such as Figure 1 shown.

[0031] The first arc circles 203 and the second arc circles 303 are of the same size, and the distance between two adjacent first arc circles 203 is smaller than the distance between two adjacent second arc circles 303; or,

[0032] The intervals between two adjacent first arc circles 203 are consistent, the intervals between two adjacent second arc circles 303 are consistent, and the curvature of the first arc circle 203 is smaller than that of the second arc circle 303;

[0033] The outer layer of the corrugated tube 3 is coated with an anti-corrosion layer in a conventional manner, such as an anti-corrosion paint;

[0034] A skeleton layer 4 is provided between the inner layer bellows 2 and the outer layer bellows 3, a first connecting ring 5 is formed at both ends of the inner layer bellows 2, a second connecting ring 6 is formed at both ends of the outer layer bellows 3, and a third connecting ring 7 is formed at both ends of the skeleton layer 4, and the third connecting ring is clamped and fixed between the two first connecting rings 5 ​​and the second connecting rings 6 located on the same side. The skeleton layer 4 is placed in the second thickness wall 302.

[0035] Through the above technical solution, the arrangement of the first arc ring 203 and the second arc ring 303 can facilitate the bending of the utility model, and after bending, due to the arrangement of the skeleton layer 4, the bending limitation of the utility model can be facilitated.

[0036] The double-wall corrugated pipe structure has good sealing performance and extends service life.

[0037] As a preferred embodiment of the above, the skeleton layer 4 includes a plurality of continuous M-shaped connectors, which have better strength.

[0038] As a preferred embodiment of the above, the skeleton layer 4 is a steel belt or a metal mesh.

[0039] As a preferred embodiment of the above, PVC is filled between the inner wall of the outer layer corrugated tube 3 and the outer wall of the inner layer corrugated tube 2, and the skeleton layer 4 is placed in the filled PVC.

[0040] As a preferred embodiment of the above, the curvature of the M-shaped connector is between the first arc circle 203 and the second arc circle 303, which is convenient for the bending of the present invention.

[0041] As a preferred embodiment of the above, the inner wall of the inner layer corrugated tube 2 is a plane or a plurality of connected arc surfaces 8 , and the curvature of the arc surface 8 is greater than the outer wall of the inner layer corrugated tube 2 .

[0042] The inner wall of the inner corrugation is a smooth plane, such as a cylindrical or slightly curved arc surface 8, which can prevent objects from getting stuck and prevent clogging.

[0043] As a preferred embodiment of the above, the double-walled corrugated pipe body 1 forms a connection part 9 on both sides, and also includes an inner connector 10 and an outer connector 11 threadedly connected to the outer side of the inner connector 10. The outer side of the connection part 9 is provided with a thread that matches the inner connector 10. The inner connector 10 is threadedly connected to the outer wall of the connection part 9. A rubber ring 14 protruding outward is fixed to the part of the outer wall between the connection part 9 and the double-walled corrugated pipe body 1. A groove 12 that matches the rubber ring 14 is provided on the inner wall of the outer connector 11. A first inclined surface 13 is provided at the inner wall end of the outer connector 11. The groove 12 squeezes the rubber ring 14 to achieve a sealed connection. Among them, the outer wall or inner wall of the inner connector 10 is formed with a thread connected to other components, and the outer side of the connection part 9 is provided with a thread that matches the outer connector 11.

[0044] The utility model simplifies the installation process by threading the inner connecting piece and the outer connecting piece.

[0045] A sealing ring is also installed between the inner connecting member 10 and the outer connecting member 11 in a conventional manner.

[0046] After the inner connector 10 is threadedly connected to the double-wall corrugated pipe body 1, the outer connector 11 is rotated so that the outer connector 11 is also threadedly connected to the connecting portion 9, so that the rubber ring 14 enters the groove 12 to achieve a sealed connection.

[0047] Compared with the prior art, the advantages of the utility model are: the utility model has a simple structure, has good bending and bending limiting effects, and due to the different curvatures inside and outside, the outer wall is not easy to stretch and break when bending, and is equipped with a connector with strong sealing properties, namely the inner connector 10 and the outer connector 11, which is convenient for installation and connection.

[0048] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0049] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A corrosion-resistant PVC double-wall corrugated pipe, characterized in that: It comprises a double-wall corrugated pipe body (1), wherein the double-wall corrugated pipe body (1) comprises an inner layer corrugated pipe (2) and an outer layer corrugated pipe (3); The inner layer corrugated tube (2) comprises a plurality of first arc-shaped rings (203) formed in one piece; The outer layer corrugated tube (3) comprises a plurality of second arc-shaped rings (303) formed in one piece; The first arc-shaped circle (203) and the second arc-shaped circle (303) are of the same size, and the distance between two adjacent first arc-shaped circles (203) is smaller than the distance between two adjacent second arc-shaped circles (303); or, The intervals between two adjacent first arc-shaped circles (203) are consistent, the intervals between two adjacent second arc-shaped circles (303) are consistent, and the curvature of the first arc-shaped circle (203) is smaller than the curvature of the second arc-shaped circle (303); The outer layer of the corrugated pipe (3) is coated with an anti-corrosion layer; A skeleton layer (4) is provided between the inner layer bellows (2) and the outer layer bellows (3); the two ends of the inner layer bellows (2) form a first connecting ring (5); the two ends of the outer layer bellows (3) form a second connecting ring (6); the two ends of the skeleton layer (4) form a third connecting ring (7); the third connecting ring (7) is clamped and fixed between the two first connecting rings (5) and the second connecting rings (6) located on the same side.

2. The corrosion-resistant PVC double-wall corrugated pipe according to claim 1, characterized in that: The skeleton layer (4) comprises a plurality of continuous M-shaped connecting pieces.

3. The corrosion-resistant PVC double-wall corrugated pipe according to claim 2, characterized in that: The skeleton layer (4) is a steel belt or a metal mesh.

4. The corrosion-resistant PVC double-wall corrugated pipe according to claim 1, characterized in that: PVC is filled between the inner wall of the outer layer corrugated pipe (3) and the outer wall of the inner layer corrugated pipe (2), and the skeleton layer (4) is placed in the filled PVC.

5. The corrosion-resistant PVC double-wall corrugated pipe according to claim 2, characterized in that: The curvature of the M-shaped connecting piece is between the first arc-shaped circle (203) and the second arc-shaped circle (303).

6. The corrosion-resistant PVC double-wall corrugated pipe according to claim 1, characterized in that: The inner wall of the inner layer corrugated tube (2) is a plane or a plurality of connected arc surfaces (8), and the curvature of the arc surface (8) is greater than the outer wall of the inner layer corrugated tube (2).

7. The corrosion-resistant PVC double-wall corrugated pipe according to claim 1, characterized in that: The double-walled corrugated pipe body (1) has connecting parts (9) formed on both sides, and also includes an inner connecting piece (10) and an outer connecting piece (11) threadedly connected to the outer side of the inner connecting piece (10); the connecting part (9) is provided with a thread matched with the inner connecting piece (10); the inner connecting piece (10) is threadedly connected to the outer wall of the connecting part (9); a rubber ring (14) protruding outward is fixed to a portion of the outer wall between the connecting part (9) and the double-walled corrugated pipe body (1); a groove (12) matched with the rubber ring (14) is provided on the inner wall of the outer connecting piece (11); a first inclined surface (13) is provided at the inner wall end of the outer connecting piece (11); the groove (12) squeezes the rubber ring (14) to achieve a sealed connection.

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