CN212518350U

CN212518350U - Double-wall corrugated pipe for cable protection

Info

Publication number: CN212518350U
Application number: CN202020936241.8U
Authority: CN
Inventors: 吕征宇; 史松峰; 顾闻; 韩东; 徐雪莲
Original assignee: State Grid Shanghai Electric Power Design Co ltd; State Grid Shanghai Electric Power Co Ltd
Current assignee: State Grid Shanghai Electric Power Design Co ltd; State Grid Shanghai Electric Power Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-02-09
Anticipated expiration: 2030-05-28

Abstract

The utility model relates to a double-walled bellows for cable protection, include the bilayer structure of constituteing by outer, the level and smooth inlayer of annular structure, outer fixed laminating in the surface of inlayer, the both ends of double-walled bellows are equipped with the socket respectively, the skin is including a plurality of equidistant ripple constitutional unit that connect gradually, and each ripple constitutional unit's wall thickness is even, and each ripple constitutional unit's crest is the horizontal plane crest, is equipped with the trough between two crests, and the crest both sides are the arc shape by convex transition angle transition, the angle between crest and arc shape's transition department and the inlayer place horizontal plane is 15, and each ripple constitutional unit's ripple water chestnut angle department all adopts circular arc chamfer, and the ripple angle that the ripple is located the trough is 10. Compared with the prior art, the utility model has the advantages of strong ring stiffness, wide application range and the like.

Description

Double-wall corrugated pipe for cable protection

Technical Field

The utility model belongs to the technical field of cable protection tubular product equipment and specifically relates to a double-walled bellows for cable protection is related to.

Background

In recent years, the amount of underground cables used in cities has increased. In order to ensure the safe operation of the cable, the quality of the cable protection pipe must meet the use requirements in the life cycle, most of the existing cable protection adopts PVC-U corrugated pipes, but the following problems exist in the practical application: the wave crest section of the corrugated outer wall is too straight, the plane of the wave crest is long, and the transition angle part has a corner, so that the wall thickness is uneven, the stress of the arc wave crest is uneven, the external pressure born by the corrugated pipe in a certain diameter deformation is small, and the integral ring rigidity of the pipe is weaker. In addition, the pipe structure has poor bending capability, and is not suitable for a calandria path with small radian, so that the application range is small.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a double-walled bellows that is used for cable protection that whole ring rigidity is strong, application scope is wide in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a double-walled bellows for cable protection, includes the bilayer structure of constituteing by outer, the level and smooth inlayer of loop configuration, outer fixed laminating in the surface of inlayer, the both ends of double-walled bellows are equipped with the socket respectively, the skin includes a plurality of equidistant corrugated structure units who connects gradually, and each corrugated structure unit's wall thickness is even, and each corrugated structure unit's crest is the horizontal plane crest, is equipped with the trough between two crests, and the crest both sides are the circular arc shape by the transition angle transition of convex, the angle between crest and circular arc shape's transition department and the inlayer place horizontal plane is 15, and each corrugated structure unit's ripple water chestnut angle department all adopts circular arc chamfer, and the ripple angle that the ripple is located the trough is 10.

Preferably, the inner layer is of tubular construction.

Preferably, the outer layer is a PVC resin layer.

Preferably, the double-walled bellows has an inner diameter of 200 mm.

Preferably, the thickness of the tube wall of each corrugated structure unit of the outer layer is 1.5mm, and the distance between adjacent wave crests is 22 mm.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) the utility model has simple structure, the outer wave crest is a horizontal plane structure, when the pipe is pressed, the wave crest of the parallel plane structure is stressed evenly, and the borne external pressure can be released evenly, so that the external pressure borne by the double-wall corrugated pipe in a certain diameter deformation is larger, and the integral ring rigidity and the impact strength of the corrugated pipe can be further improved by combining the outer layer with the PVC resin layer;

2) the angle between the transition position of the wave crest and the arc shape and the horizontal plane of the inner layer is 15 degrees, the water caltrop position of the corrugation of the double-wall corrugated pipe is also the arc chamfer, the corrugation angle of the corrugation at the trough position is 10 degrees, so that the pipe structure has better bending capacity, is suitable for the calandria path with small radian bending, and improves the application range of the whole double-wall corrugated pipe;

3) the inner layer of the double-wall corrugated pipe is of a tubular structure, the inner wall and the outer wall of the double-wall corrugated pipe are of smooth structures, the number of layers of the pipe wall is increased by the inner layer of the tubular structure, the permeability is reduced, and the outer layer of the annular structure can be prevented from being broken due to extrusion;

4) because of adopting the circular arc transition, the transition angle is smooth and flat, the material flows smoothly in the production process, the corrugated shape of the pipe is beautiful and consistent, and the product quality and performance can be greatly improved.

Drawings

FIG. 1 is a cross-sectional view of a double-walled corrugated tube for cable protection in an embodiment;

FIG. 2 is a schematic cross-sectional view of a double-walled corrugated pipe for cable protection along an axial pipe wall according to an embodiment;

the reference numbers in the figures indicate:

1. outer layer, 2, inner layer, 3, spigot, 4, crest, 5, trough, 6, ripple water chestnut.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

Examples

The utility model relates to a double-walled bellows for cable protection, this double-walled bellows include outer 1 and the level and smooth inlayer 2 of annular structure, and outer 1 is fixed to be laminated in inlayer 2's surface, and the both ends of double-walled bellows set up socket 3 respectively.

The outer layer 1 includes a plurality of corrugated structural units connected in series at equal intervals, and the wall thickness of each corrugated structural unit is uniform. The outer layer 1 adopts a PVC resin layer to improve the impact strength and the ring rigidity. The wave crests 4 of each corrugated structure unit of the outer layer 1 are horizontal plane wave crests, a wave trough 5 is arranged between the two wave crests 4, the two sides of each wave crest 4 are in an arc shape formed by arc transition angles, and the angle a between the transition position of the wave crests 4 and the arc shape and the horizontal plane where the inner layer 2 is located is 15 degrees. The corrugated water chestnut corners 6 of the double-wall corrugated pipe are all arc chamfers, and the corrugated angle b of the corrugations at the wave troughs 5 is 10 degrees.

The inner layer 2 is a tubular structure, and the inner wall and the outer wall of the inner layer are smooth structures. The inner layer 2 of the tubular structure not only increases the number of layers of the pipe wall and reduces the permeability, but also can be used for preventing the outer layer 1 of the annular structure from being broken due to extrusion.

In this embodiment, the inside diameter of the entire double-walled bellows is preferably 200 mm. The thickness of the tube wall of the outer layer 1 is 1.5mm, and the distance between the individual peaks 4 is 22 mm.

The wave crests are of a horizontal plane structure, and after the pipe is pressed, the wave crests of the parallel plane structure are stressed uniformly, and borne external pressure can be released uniformly, so that the external pressure borne by the double-wall corrugated pipe in a certain diameter deformation is larger, and the integral ring stiffness of the corrugated pipe is improved. The utility model discloses the comparable solid-wall tubular product save material of double-walled bellows about 30%.

The angle between the transition position of the wave crest and the arc shape and the horizontal plane of the inner layer is 15 degrees, the diamond corners of the corrugations of the double-wall corrugated pipe are also arc chamfers, and the corrugation angle of the corrugations at the wave trough is 10 degrees, so that the pipe structure has better bending capacity, is suitable for a pipe arranging path with small radian bending, and further improves the application range of the whole double-wall corrugated pipe.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A double-wall corrugated pipe for cable protection is characterized by comprising a double-layer structure consisting of an outer layer (1) and a smooth inner layer (2) of an annular structure, wherein the outer layer (1) is fixedly attached to the outer surface of the inner layer (2), sockets (3) are respectively arranged at two ends of the double-wall corrugated pipe, the outer layer (1) comprises a plurality of corrugated structure units which are sequentially connected at equal intervals, the wall thickness of each corrugated structure unit is uniform, peaks (4) of each corrugated structure unit are horizontal plane peaks, a trough (5) is arranged between the two peaks (4), two sides of each peak (4) are in an arc shape which is transited by arc transition angles, the angle between the transition position of each peak (4) and the arc shape and the horizontal plane where the inner layer (2) is located is 15 degrees, and the arc chamfer angles (6) of each corrugated structure unit are all arc chamfers, the corrugation angle of the corrugation at the wave trough (5) is 10 degrees.

2. A double-walled corrugated pipe for cable protection according to claim 1, characterized in that the inner layer (2) is of tubular construction.

3. A double-walled corrugated pipe for cable protection according to claim 1, characterized in that the outer layer (1) is a PVC resin layer.

4. A double-walled corrugated pipe for cable protection according to claim 1, wherein the double-walled corrugated pipe has an inner diameter of 200 mm.

5. A double-walled corrugated pipe for cable protection according to claim 4, characterized in that the thickness of the pipe wall of each corrugated structural unit of the outer layer (1) is 1.5mm and the distance between adjacent wave crests (4) is 22 mm.