KR20070084526A - Shaped spiral wound pipe - Google Patents

Abstract

The present invention ralates to a shaped spiral wound pipe, which is multilayer formed by winding two kinds of shapes continuously, wherein Shape A have a T-shaped rib and a T-shaped notch at the edge thereof respectively, and have spaced grooves and ridges between the T-shaped rib and the T-shaped notch. The adjacent T-shaped rib and T-shaped notch engage lockingly as the spiral wound pipe is shaped, and the grooves and ridges form spiral grooves and/or ridges. The shaped spiral wound pipe features that Shape B engage with the Shape A, wherein the Shape A is the base layer of the spiral wound pipe, and the Shape B make up of at least one overlapping reinforcing layer, and the overlapping reinforcing layer have spiral grooves and ridges so as to engage with Shape A or Shape B further. The Shape B have a ridge or a groove, or have a ridge and a groove on the upper and lower end thereof respectively, and the grooves or ridges engage lockingly with the spiral grooves or ridges formed by winding the Shape A.

Description

Spiral wound pipes of molding material {SHAPED SPIRAL WOUND PIPE}

The present invention relates to a pipe in which a large diameter molding material is spiral wound.

Currently, cast iron pipes and cement pipes are used in the supply pipeline. However, the production of these pipes requires large molds, and the transport of the pipes is very difficult. In addition, pipes are poorly resistant to acid or alkali corrosion. On the other hand, PVC pipes have good corrosion resistance, but molds are still used for their production in the currently available technology, and therefore it is impossible to manufacture large diameter pipes.

Chinese patent ZL92200016.6 discloses a technique relating to a wound plastic spiral molding material for producing spirally formed pipes. The molding material has ribs on one side and grooves on the other side. During continuous spiral formation, the ribs are secured close to the grooves to form a spiral pipe. However, this technique has one problem, that is, such materials cannot be used to manufacture large diameter pipes. This is because such materials have a limited thickness and therefore cannot guarantee sufficient strength when used to produce large pipes. Adopting superimposed winding, it is not possible to achieve the desired strength because the layers cannot be fixed.

Chinese patent ZL001330209 discloses a technique for manufacturing pipes by winding plastic molding materials. In this technique, large diameter pipes can be produced by multilayer winding. However, during winding, there is a problem that it is difficult to properly join the layers. The winding equipment has a very complex structure and will leave a lot of spares and ends. Moreover, the amount of molding material and the winding method cannot be selected depending on the diameter and strength of the pipe.

It is an object of the present invention to provide a pipe wound spirally with a molding material which enables the production of long-lived large diameter pipes in the field and allows the selection of the amount and winding method of the molding material according to the diameter and strength of the pipe. .

The present invention relates to a shaped spiral wound pipe, in which a multi-layered molding material is formed by winding two types of molded parts continuously, wherein the molded parts A each have T-shaped ribs at the edges. And a T-shaped notch, and also a spirally wound molding material having grooves and ridges spaced between the T-shaped ribs and the T-shaped notches. When the spirally wound pipe is molded, the adjacent T-shaped ribs and the T-shaped notches are engaged to lock, the grooves and the protrusions forming spiral grooves and / or protrusions. In the pipe in which the molding material is spirally wound, the molding part B is combined with the molding part A, and the molding part A is a base layer of the spirally wound pipe, and the molding part B is At least one overlap reinforcement layer is formed, the overlap reinforcement layer having spiral grooves and protrusions to engage with a molded part (A) or another said molded part (B). The molding part B has protrusions or grooves at the upper end and the lower end, respectively, or has protrusions and grooves, and the grooves or protrusions are coupled to be locked with the spiral grooves or protrusions formed by winding the molding part A. FIG. .

If a spiral pipe with a larger diameter or higher strength is required, the spiral protrusions or grooves of the overlapping reinforcement layer formed by winding the molding part B are combined with the protrusions or grooves of the molding part B to further form one or more reinforcing layers. Can be. The molded part B may be wound adjacent or spaced apart from the helical protrusion or groove.

The above structure of the present invention can be further explained by the drawings.

1 is a view showing the structure of protrusions of the upper end and the lower end of the molding part B. FIG.

2 is a diagram illustrating a structure of the molding portion A. FIG.

3 is a diagram illustrating a structure of windings at intervals of the molding part B. FIG.

4 is a diagram showing the structure of Example 2. FIG.

5 shows a spiral wound pipe;

Explanation of symbols on the main parts of the drawings

1: T-shaped rib 2: T-shaped notch

3: groove 4: protrusion

Referring to FIGS. 1 and 2, the molded part B has protrusions at the upper end and the lower end, and the molded part A has a T-shaped rib 1 and a T-shaped notch 2. It has a groove and a projection spaced between the rib and the T-shaped notch. Adjacent T-shaped ribs and T-shaped notches are combined to lock when the spirally wound pipe is molded, the grooves and protrusions forming spiral grooves and / or protrusions in the base layer (molding portion A) of the spirally wound pipe. .

Referring to FIG. 3, the spirally wound pipe is formed by winding one overlap reinforcement layer formed by the shaping portion B with a spacing between the shaping portions A. FIG.

Referring to FIG. 4, in the spirally wound pipe, a base layer made of the molding part A and two overlapping reinforcing layers made of the molding part B are formed, and in the two overlapping reinforcing layers, the first layer is formed. Coils firmly, and the second layer is wound at intervals.

In this example, the molded part A and the protrusion 4 of the molded part B made of PVC have a locking notch. During the manufacture of large diameter pipes, the reinforcing ribs may be embedded in the pipes. The T-shaped notch 2 may have a pigeon tail shape, and the T-shaped rib 1 has a pigeon tail shape to be engaged with the rib.

Further preferred examples of the present invention are as follows.

All adjacent moldings A and B are joined to lock, firmly bonded, and when the spirally wound pipe is formed, all the joined grooves 3 and the projections 4 are firmly bonded. .

The present invention has the following advantages due to its structure.

1. Molded material can be produced in factory, pipe can be assembled on site, saving transportation cost.

2. The pipe is small in weight and is only half the weight of the cement pipe. Roughness coefficient N of the pipe wall is N = 0.008-0.01.

3. The pipe has good resistance to acid, alkali, abrasion and vibration. The pipe is also strongly resistant to displacement.

4. The diameter and strength of the pipe can be flexibly adjusted according to the actual requirements in terms of cost efficiency.

5. Simple structures of molded material require only simple processes and simplified facilities.

The invention can be used to produce large diameter feed pipes which are particularly suitable in the fields of sewage discharge, water diversion, irrigation, builing form work, transportation, telecommunications cabling and the like. have.

Claims (3)

In a shaped spiral wound pipe, which is a multi-layered molding material formed by winding two kinds of molded parts continuously, The forming portion A has a T-shaped rib and a T-shaped notch at the edge, respectively, and also has a groove and a ridge spaced between the T-shaped rib and the T-shaped notch. , When the spirally wound pipe is molded, the adjacent T-shaped ribs and the T-shaped notches are joined to lock, The groove and the protrusion form a spiral groove and / or a protrusion, Molding part (B) is combined with the molding part (A), The forming portion A is the base layer of the spirally wound pipe, The molding part (B) forms at least one overlap reinforcement layer, The overlap reinforcement layer has a spiral groove and a protrusion to engage with the molded part (A) or another molded part (B), The molded part (B) has a protrusion or a groove in each of the upper end and the lower end, or has a protrusion and a groove, The groove or protrusion is coupled to be locked with the spiral groove or protrusion formed by winding the forming portion (A) A pipe wound by a molding material, characterized in that the spiral. The method of claim 1, A spirally wound molding material, characterized in that the spiral groove or the protrusion of the overlap reinforcement layer is combined with the protrusion or the groove of the forming part (B) to further form one or more overlap reinforcement layers. The method of claim 1, And the shaping portion (B) is wound around or spaced apart from the helical groove or the helical protrusion.

Images