CN2658516Y

CN2658516Y - Hollow wall plastic tubew ith screw rib

Info

Publication number: CN2658516Y
Application number: CN 03209401
Authority: CN
Inventors: 金学厚
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-09-11
Filing date: 2003-09-11
Publication date: 2004-11-24
Anticipated expiration: 2013-09-11

Abstract

The utility model relates to a hollow plastic tube with a helical rib and consists of an internal tube wall, an external tube wall and a rib connecting the internal and external tube walls. The rib is arranged in a space between the internal and external tube walls. At least a helical rib taking a centerline of the tube as a directing line is securely connected with the internal and external tube walls at an external helical edge and an internal helical edge. The utility model has the advantages that the structure is simple, the force is uniform during the use, the physical mechanic performance is enhanced greatly, especially the ring rigidness and the strength resistance to the internal air pressure are greatly enhanced and the service life is prolonged.

Description

The empty wall plastic tube of band screw rib

Technical field

The utility model relates to a kind of empty wall plastic tube with screw rib.

Background technique

In the prior art, empty wall plastic tube contains the empty wall hush pipe of flat pipe of sky wall and inner wall belt spiral bar.These two kinds pipe ribs that combine with the internal and external layer tube wall that tubing had are the lineal shape rib along the tubing axial direction; The anti-interior pressure of empty wall plastic tube and the intensity minimum point of external pressure are just in the both sides in empty wall chamber (being the part of not having in the structural pipe wall in conjunction with rib).And the bad mold joint that forms via the shunting support in the cross-head is very high at the probability of cavity wall both sides, and the adhesive strength of bad mold joint is the weakest link of tubing intensity often.Therefore, usually there is harmful effect in the intensity of both sides, the empty wall chamber of empty wall plastic tube to the tubing bulk strength, forms the lineal shape cracking along axial direction easily.

Summary of the invention

Its purpose of the utility model is to provide a kind of empty wall plastic tube with screw rib, and it is rational in infrastructure, and is stressed even in the use, ring rigidity and internal pressure strength height, thus improved working life.

The utility model is achieved in that a kind of empty wall plastic tube with screw rib, comprise: inside and outside tube wall and connect rib between the inside and outside tube wall, described rib are at least one to be that its internal and external screw limit of spiral helicine rib of lead is affixed with inside and outside tube wall respectively with the tubing center line in being located between inside and outside tube wall hollow.Described rib is left hand screw or right-hand screw, and the quantity of its screw rib increases with the increase of caliber.Its cross section of described rib is quadrilateral, abnormity.The hollow-wall drainpipe that described inside and outside tube wall constitutes is concentric pipe.

Extrude in the production process at tubing, the head member shunting comb that forms pipe structure hollow wall part is complementary along cross-head center and hauling speed to be rotated by certain speed, in the tubing distraction procedure, the rib of empty wall spaced portion forms helical and is looped around between the inside and outside wall of sky wall plastic tube.

The utility model is simple and reasonable, in the use stressed evenly, physical and mechanical properties improves a lot, especially ring stiffness and internal pressure strength are significantly improved, and have improved working life.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model triangle spiral bar hollow-wall drainpipe example structure schematic representation;

Accompanying drawing number:

1. outer tube wall 2. inner tubal walls 3. screw rib 4. triangle spiral bars

Embodiment:

Its structure of the utility model is as depicted in figs. 1 and 2:

Embodiment 1: the empty wall Plastic Flat of screw rib pipe.

Being provided with some in the space in its inside and outside tube wall 2,1 is the helical rib 3 of lead with the tubing center line, and its internal and external screw limit and inside and outside tube wall are affixed.As shown in Figure 1.

Embodiment 2: the empty wall hush pipe of the screw rib of inner wall belt spiral bar.

Being provided with some in the space in its inside and outside tube wall 2,1 is the helical rib 3 of lead with the tubing center line, and its internal and external screw limit and inside and outside tube wall are affixed, and the triangle spiral bar 4 of tube wall inner chamber is affixed with inner tubal wall.As shown in Figure 2.

Described screw rib 3, its number increases along with the increase of inside and outside tube wall diameter.

The empty wall plastic tube of above-mentioned several screw rib, extrude in the production process at tubing, the head member shunting comb that forms pipe structure hollow wall part is complementary along cross-head center and hauling speed to be rotated by certain speed, in the tubing distraction procedure, the rib of empty wall spaced portion forms helical and is looped around between the inside and outside wall of sky wall plastic tube.

Experimental results show that: the utlity model has following actively useful effect:

1. because screw rib along the spiral winding of tubing, has produced similar " brush is smeared " effect, alleviated the strength reduction phenomenon that causes owing to the current mark of shunting the support generation in the head.

2. because screw rib is twined along the spiral between the tubing inside and outside wall, make the empty wall chamber of sky wall plastic tube form clocklike support at interval, thereby improve the support strength of both sides, empty wall chamber along axial direction.

3. because the support reinforcing effect of screw rib has improved the physical and mechanical properties such as compressive strength, ring stiffness and impact strength of empty wall plastic tube.

Claims

1. empty wall plastic tube with screw rib, comprise: inside and outside tube wall (2), (1) and connect rib (3) between the inside and outside tube wall is characterized in that: described rib (3) is that its internal and external screw limit of spiral helicine rib (3) of lead is affixed with inside and outside tube wall respectively for being located in inside and outside tube wall (2), (1) in space at least one with the tubing center line.

2. the empty wall plastic tube of band screw rib as claimed in claim 1 is characterized in that: described rib (3) is left hand screw or right-hand screw, and the quantity of its screw rib increases with the increase of caliber.

3. the empty wall plastic tube of band screw rib as claimed in claim 1 is characterized in that: its cross section of described rib (3) is quadrilateral, abnormity.

4. as the empty wall plastic tube of claim 1,3 described band screw rib, it is characterized in that: the hollow-wall drainpipe that described inside and outside tube wall (2), (1) constitute is concentric pipe.