CN202118396U

CN202118396U - Reinforced PVC-U (unplasticized polyvinyl chloride) double-wall corrugated pipe

Info

Publication number: CN202118396U
Application number: CN201120232596XU
Authority: CN
Inventors: 赖志强; 杨继跃
Original assignee: Heshan Liansu Industrial Development Co Ltd
Current assignee: Heshan Liansu Industrial Development Co Ltd
Priority date: 2011-07-04
Filing date: 2011-07-04
Publication date: 2012-01-18
Anticipated expiration: 2021-07-04

Abstract

The utility model discloses a reinforced PVC-U (unplasticized polyvinyl chloride) double-wall corrugated pipe. The reinforced PVC-U double-wall corrugated pipe wall is formed by rolling a long-strip-shaped PVC-U plate tape with a corrugated protruded ridge portion prior to mutually welding. The corrugated protruded ridge portion is in an arc shape transited by an arc-shaped transition angle. The ratio of the width of the bottom face of the cross section of the corrugated protruded ridge portion to the height of the same is 1.2 to 1.25. The ratio of the width of the bottom face of the cross section to the width of the top face of the cross section is 9 to 14. The ratio of the internal diameter of the corrugated pipe to the height of a trapezoid corrugated cross section is 14 to 14.50. A PVC-U melt layer is coated on a welding portion. The reinforced PVC-U double-wall corrugated pipe is simple in structure, convenient to manufacture and high in ring stiffness. A wave crest portion and the transition angle are integrally in an arc shape. The wall is uniform in thickness, so that capacity of resisting impact from external force is greatly improved. Simultaneously, by aid of arc-shaped transition, the transition angle is smooth, so that materials flow smoothly during production. The pipe is attractive and consistent in corrugated shape, so that production quality and performance can be greatly improved.

Description

A kind of reinforced PVC-U double-wall corrugated pipe

Technical field

The utility model relates to the tubing equipment and technology, relates in particular to a kind of reinforced PVC-U double-wall corrugated pipe.

Background technique

Double-wall corrugated pipe is selected RPVC (PVC--U) extruding and moulding for use.Having different many advantages such as inner wall smooth, discharge value be big, in light weight, corrosion-resistant, is the underground best substitute of burying various tubing underground.Be mainly used in underground draining, the blow-off line buried underground in residential quarters at present; High voltage cable, post and telecommunications cable cover(ing); The pre-buried pipeline of expressway circuit; Farmland, water conservancy irrigation water delivery, water drainage; Chemical industry, mine are used for the conveying of fluid or solid etc.But find following problem in the practical application: its crest section of corrugated outer wall shape of original tubing is too straight, and the crest plane is long, and the transition angular position has " turning " to exist, and causes wall unevenness even, and has bigger internal stress at place, transition angle.Make tubing bury underground in the process, as be prone to when receiving the object hard collision that the external world has sharp keen wedge angle damagedly, cause the damage of tubing ripple in transportation and installation.Simultaneously, this form structure in process of production, Flow of Goods and Materials is not smooth.When interlayer air pressure is unstable, can cause the inconsistent of ripple profile, influence outward appearance and quality of product, and no matter present double-wall corrugated pipe be to use PVC or HDPE material, the double-wall corrugated pipe forming machine of its process equipment is costliness very all.

Summary of the invention

The purpose of the utility model provides a kind of reinforced PVC-U double-wall corrugated pipe, and simple in structure, ring stiffness is strong, easily manufactured with can effectively improve the join strength of bellow flare;

A kind of PVC-U double-wall corrugated pipe; Its tube wall is that the strip PVC-U strip that has a protruding spine of corrugated rolls then welding each other and forms; The protruding spine of said corrugated is the circular shape by circular arc transition angle transition; The width of corrugated boss ridge cross section bottom surface and aspect ratio are 1. 2-1. 25, and the width of the width of this bottom surface, cross section and end face is than being 9-14.

Its preferred option is to scribble one deck PVC-U melt on the said weld portion.Be enclosed with steel wire or steel band that spiral twines in the PVC-U melt on weld portion.

Compared with prior art, the advantage of the utility model is:

The utility model is simple in structure, makes great convenience, and the reinforced double-wall corrugated pipe ring stiffness that constitutes is high, and crest position in the utility model and transition angle integral body are circular shape, and wall thickness is even, has strengthened the ability that its external force resistance impacts greatly.The utility model adopt to improve the method for intercept, and the structural parameter of four faces through the adjustment ripple improve the centre of form of ripple, and the centre of form has improved, and intercept increases, and ring stiffness then increases.Simultaneously, owing to adopt the circular arc transition, its transition angle slyness is smooth, and in the production process formula, Flow of Goods and Materials is smooth and easy, and the bellows-shaped of tubing unanimity attractive in appearance can greatly be improved the quality of products and performance.

Description of drawings

Fig. 1 is the structural drawing of the utility model;

Fig. 2 is the utility model circular shape ripple cross-sectional view;

Fig. 3 is the utility model weld structural drawing.

Embodiment

The specific embodiment of the utility model; Shown in Figure 1, a kind of reinforced PVC-U double-wall corrugated pipe, its tube wall are that the strip PVC-U strip that has a protruding spine of corrugated rolls then welding each other and forms; The inwall 7 of double-wall corrugated pipe is straight pipeline section, and outer wall 2 is corrugated.In the present embodiment; The crest position of corrugated outer wall 2 is the circular shape by circular arc transition angle transition; The protruding spine of said corrugated is the circular shape by circular arc transition angle transition; The width of corrugated boss ridge cross section bottom surface and the aspect ratio of circular shape ripple cross section are 1. 2-1. 25, and the width of the width of this bottom surface, cross section and end face is than being 9-14.Outer wall 2 ripple slynesses are smooth, do not have at " turning ", and wall thickness is even, and the cross section of the protruding spine of said each corrugated is the structure of hollow.

As shown in Figure 2, the width of circular shape ripple cross section bottom surface 6 and the aspect ratio of circular shape ripple cross section are 1. 2-1. 25; The width of bottom surface, cross section 6 is 8-10 with the width ratio of end face 1.

As shown in Figure 3, in the weld portion 3 of strip, i.e. A part among Fig. 1; On scribble one deck PVC-U melt 4 again, the reinforced double-wall corrugated pipe of the utility model need not expensive double-wall corrugated pipe forming machine during fabrication; Only the equipment that need roll rolls strip strip spiral; Weld portion 3 is welded together, and then on weld portion 1, is coated with last layer PVC-U melt 4, get final product after roll extrusion then, the cooling; In order further to improve the ring stiffness of pipe, be enclosed with steel wire 5 or steel band that spiral twines in the PVC-U melt 4 on weld portion 3.

The reinforced PVC of the utility model-U double-wall corrugated pipe ring stiffness can reach SN4-SN8, compares existing double-wall corrugated pipe ring stiffness SN2 and is greatly improved.

Claims

1. reinforced PVC-U double-wall corrugated pipe; It is characterized in that; Its tube wall is that the strip PVC-U strip that has a protruding spine of corrugated rolls then welding each other and forms; The protruding spine of said corrugated is the circular shape by circular arc transition angle transition; The width of corrugated boss ridge cross section bottom surface and aspect ratio are 1. 2-1. 25, and the width of the width of this bottom surface, cross section and end face is penetrated with the connecting tendon of axial a plurality of annular spread than being 9-14 between the protruding spine of said each corrugated.

2. reinforced PVC according to claim 1-U double-wall corrugated pipe is characterized in that, scribbles one deck PVC-U melt on the said weld portion.

3. reinforced PVC according to claim 2-U double-wall corrugated pipe is characterized in that, is enclosed with steel wire or steel band that spiral twines in the PVC-U melt on weld portion.