CN111306371A - High-strength spiral corrugated pipe - Google Patents

Abstract

The invention relates to a high-rib spiral corrugated pipe which comprises a pipe bottom belt and a plastic section, wherein the plastic section is spirally wound on the outer side of the pipe bottom belt to form an outer corrugated shape, the plastic section comprises a hollow body and a vertical rib, the body is formed by enclosing a bottom edge and two side edges, the vertical rib is positioned in the body and divides a cavity in the body into two parts, and the tops of the two side edges of the body are connected with the side walls of the vertical rib. The corrugated pipe extrusion device can reduce materials required in pipe manufacturing, reduce the meter weight of the whole corrugated pipe, greatly improve the extrusion production speed, ensure the ring stiffness of the corrugated pipe, and improve the tensile strength of the corrugated pipe, so that the whole corrugated pipe is not easy to break.

Description

A kind of high rib spiral corrugated pipe

【Technical field】

The invention relates to a plastic reinforced spiral corrugated pipe, which is a buried pipe and is widely used in laying various drainage pipes.

【Background technique】

In recent years, with the large demand for municipal pipes, many plastic pipes have appeared, such as PVC pipes, straight-through water pipes, steel belt reinforced winding structure wall pipes, spiral corrugated pipes with hollow convex ribs, etc.

The Chinese patent number is ZL 201610584263.0, and the patent titled a plastic reinforced winding corrugated pipe discloses a plastic reinforced winding corrugated pipe, which includes a pipe bottom tape and a plastic profile, and the plastic profile is spirally wound on the outside of the pipe bottom tape to form a The outer corrugated shape, the plastic profile includes a hollow body and a vertical rib, the body is an isosceles triangle or an isosceles trapezoid, the vertical rib is located in the body and divides the cavity inside the body into two, the body The top of the rib is arc-shaped; longitudinal through holes are arranged in the vertical rib.

After the development and use of the above-mentioned plastic reinforced winding corrugated pipe in the company's early stage, it was found that there are the following defects: the body of the plastic profile completely wraps the rib inside it, and the corrugated pipe is subjected to stress during use. The acting force mainly acts on the top of the rib, that is, the ring stiffness of the bellows is mainly provided by the rib. Therefore, the body of the plastic profile, due to its large overall cross-section, will inevitably increase the material required for pipe making, and also increase the meter weight of the entire corrugated pipe.

The Chinese patent number is ZL 201010218818.2, the name is inner rib reinforced outer corrugated plastic winding structure wall pipe and its manufacturing method, discloses an inner rib reinforced outer corrugated plastic winding structure wall pipe, including a cylindrical pipe body and a spiral surrounding The reinforcing rib on the outside of the tube body contains a reinforcing inner rib perpendicular to the tube wall. The inner rib divides the reinforcing rib into two parallel hollow cavities. The two sides of the hollow cavity of the tubular protrusion are formed by fusion with the melt glue. The upper part of the stiffener, the top of the inner rib may have solid protrusions.

The above-mentioned inner rib reinforced outer corrugated plastic winding structure wall pipe has the following defects:

1. The welding surface is the entire section in the hoop direction, which reduces the ring stiffness of the structural wall pipe. Once the process is not properly controlled, it is easy to cause insufficient tensile strength of the pipe, which is easy to break, and the ripples are spring-like.

2. The reinforced inner rib is formed by melting glue, which leads to the inability of the width of the reinforced inner rib to be unified, that is, the ring stiffness of the entire structural wall pipe cannot be guaranteed, and the meter weight of the pipe increases.

3. Although it is disclosed that the top of the reinforced inner rib can have a solid protrusion, the solid protrusion is formed by sol, and the reinforced inner rib formed by the sol must be under the action of a large external extrusion force to make it. A dense structure is formed inside, and a supporting force is formed. The method of using the roller to roll as disclosed in this patent is not only difficult to ensure that the extrusion amount of the sol is consistent, but also the extrusion force is difficult to control, so it is difficult to ensure that the technical indicators required for strengthening the inner rib are achieved, so that the entire The tubing does not achieve the desired ring stiffness.

[Content of the invention]

In order to solve the above problems, the purpose of the present invention is to provide a high-strength spiral corrugated pipe that can not only ensure the rigidity of the ring, but also reduce the required materials, reduce the weight of the meter, and increase the tensile strength, and is not easy to break.

In order to achieve the above purpose, the technical scheme adopted by the present invention is: a high-strength spiral corrugated pipe, comprising a pipe bottom band and a plastic profile, the plastic profile is spirally wound on the outside of the pipe bottom tape to form an outer corrugated shape, and the plastic profile includes: A hollow body and a rib, the body is formed by a bottom edge and two side edges, the rib is located in the body, and divides the cavity inside the body into two, the two sides of the body are The top of the side edge is connected with the side wall of the vertical rib.

A high-rib spiral corrugated pipe in the present invention is further configured as follows: longitudinal through holes are arranged in the vertical ribs.

A high-rib spiral corrugated tube in the present invention is further configured as follows: the longitudinal through holes are located in the vertical ribs inside the body.

The high-rib spiral corrugated pipe in the present invention is further configured as follows: the main body and the vertical ribs are formed by co-extrusion and composite molding.

The high-rib spiral corrugated pipe of the present invention is further configured as follows: when the main body and the vertical ribs are co-extruded and combined, the bottom edge of the main body and the bottom of the vertical ribs are co-extrusion composite points, and the two sides of the main body are The co-extrusion compound point is between the top and the side wall of the rib.

A high-rib spiral corrugated pipe in the present invention is further configured as follows: the height between the connection point between the top of the two sides of the body and the side wall of the vertical rib to the bottom of the vertical rib is not lower than the entire vertical rib 75% of the height.

A high-rib spiral corrugated pipe in the present invention is further configured as follows: the cross-section of the vertical ribs is a long strip, and it can also be a trapezoid with a lower width and an upper narrow.

The high-rib spiral corrugated tube in the present invention is further configured as follows: the two sides of the main body are arc-shaped or straight.

Compared with the prior art, the present invention has the following beneficial effects:

1. The rib is first formed, so that the height and width of the rib can be determined according to the ring stiffness required by the corrugated pipe. The intersection of the reinforced inner rib formed by sol, the size of the rib and the internal structure and other technical indicators are all improved. It is easy to control, so as to ensure the ring stiffness of the bellows, and the co-extrusion and composite molding of the rib and the main body is not only conducive to heat dissipation, but also greatly improves the extrusion production speed.

2. The body of the plastic profile no longer follows the height of the vertical bar and completely covers the vertical bar inside it. Therefore, the overall cross-section of the body of the plastic profile is relatively small, and the material required for pipe making is relatively reduced, reducing the meter weight of the entire corrugated pipe.

3. The vertical through holes are arranged in the vertical ribs, and the longitudinal through holes are located in the vertical ribs inside the body, which not only ensures the rigidity of the ring, but also reduces the meter weight of the corrugated pipe, and can increase the line speed during production. be improved.

4. There is no annular welding surface, which improves the tensile strength of the bellows and makes the entire bellows less likely to break.

【Description of drawings】

Figure 1 is a schematic structural diagram of the present invention.

FIG. 2 is an enlarged schematic view of the structure of part A in FIG. 1 .

FIG. 3 is a schematic structural diagram of the body in FIG. 2 when both sides of the body are arc-shaped.

FIG. 4 is a schematic structural diagram when the vertical rib in FIG. 2 is a trapezoid that is wide at the bottom and narrow at the top.

In the figure: 1. Pipe bottom band, 2. Main body, 21. Bottom edge, 22. Side edge, 3. Rib, 4. Co-extrusion compound point, 5. Through hole, a. The height from the connection point between the side walls of the rib to the bottom of the rib.

【Detailed ways】

The high-rib helical corrugated pipe of the present invention will be further described in detail below through specific embodiments.

As shown in Figures 1 and 2, a high-strength spiral corrugated pipe includes a pipe bottom strip 1 and a plastic profile, the plastic profile is spirally wound on the outside of the pipe bottom strip 1 to form an outer corrugated shape, and the plastic profile includes a hollow The main body 2 and the rib 3, the cross section of the rib 3 is a long strip, as shown in FIG. The vertical rib 3 has higher supporting force, and the shape of the vertical rib 3 can also be other special-shaped structures, which all belong to the protection scope of the present invention. The body 2 is formed by a bottom edge 21 and two side edges 22. The two sides 22 of the body 2 are arc-shaped edges. As shown in FIG. 3, the two sides 22 of the body 2 can also be Straight sides, the two sides 22 of the main body 2 can also have different shapes such as a bending structure, which all belong to the protection scope of the present invention. The vertical rib 3 is located in the main body 2 and divides the cavity inside the main body 2 into two parts. The tops of the two side edges 22 of the main body 2 are connected with the side walls of the vertical rib 3 .

As a preferred solution, the main body 2 and the rib 3 are co-extruded and formed. When the body 2 and the rib 3 are co-extruded and compounded, the bottom edge 21 of the body 2 and the bottom of the rib 3 are co-extruded compound points 4 , and the tops of the two sides 22 of the body 2 and the side of the rib 3 are co-extruded. Between the walls is a co-extrusion compound point 4. In order to increase the firmness of the co-extrusion compound, a common trough structure can be provided.

As a preferred solution, longitudinal through holes 5 are provided in the vertical rib 3 . As a preferred solution, the longitudinal through holes 5 are located in the vertical ribs 3 inside the body 2 . Therefore, not only the supporting force of the vertical bars 3 is ensured, but also the meter weight of the corrugated pipe is reduced, and the line speed during production can be improved. The hole type, the number of holes and the arrangement of holes of the through holes 5 are not specifically limited in this solution, and all belong to the protection scope of the present invention.

As a preferred solution, the height a between the connection point between the top of the two sides 22 of the body 2 and the side wall of the vertical rib 3 to the bottom of the vertical rib 3 is not lower than 75% of the height of the entire vertical rib 3 . Therefore, it is ensured that the two sides 22 of the main body 2 can give sufficient supporting force to the vertical ribs 3, and the vertical ribs 3 located outside the main body 2 are also prevented from being easily collapsed under the action of strong force.

The preparation method of the high-rib spiral corrugated pipe is as follows: during production, the vertical ribs 3 are first formed, so that the width of the vertical ribs 3 can be determined according to the ring stiffness required by the corrugated pipe, so as to ensure the ring stiffness of the corrugated pipe. The rib 3 and the main body 2 are co-extruded and composited to form a plastic profile. When the main body 2 and the vertical rib 3 are co-extruded and composited, the bottom edge 21 of the main body 2 and the bottom of the vertical rib 3 are the co-extrusion composite point 4. Between the tops of the two sides 22 and the side walls of the vertical ribs 3 is a co-extrusion compound point 4, which is not only conducive to heat dissipation, but also greatly improves the extrusion production speed. After the plastic profile is manufactured, the long base tape is wound and welded to form the pipe bottom tape 1, and at the same time, the middle part of the bottom of the plastic profile is thermally fused and wound with the connection point of the base tape, and the plastic profile is in the pipe bottom tape 1. An outer corrugated shape is formed on the outer side of the pipe bottom strip 1, and sockets and sockets are welded respectively on both ends of the pipe bottom strip 1, thereby forming a corrugated pipe.

The above-mentioned embodiments are only illustrative of the principles and effects of the present invention, as well as some applied embodiments, but are not intended to limit the present invention; it should be pointed out that for those of ordinary skill in the art, without departing from the present invention Under the premise of creating ideas, several modifications and improvements can also be made, which all belong to the protection scope of the present invention.

Claims (8)

1. The utility model provides a high muscle helical bellows, includes area and plastic material at the bottom of the tubular product, and plastic material spiral winding forms outer ripple shape, its characterized in that at the outside of area at the bottom of the tubular product: the plastic section bar comprises a hollow body and a vertical rib, wherein the body is formed by enclosing a bottom edge and two side edges, the vertical rib is positioned in the body and divides a cavity in the body into two parts, and the tops of the two side edges of the body are connected with the side walls of the vertical rib.

2. A high-rib helical bellows as claimed in claim 1, wherein: the vertical ribs are provided with longitudinal through holes.

3. A high-rib helical bellows as claimed in claim 2, wherein: the longitudinal through holes are positioned in the studs inside the body.

4. A high-rib helical bellows as claimed in claim 1, wherein: the body and the vertical bars are formed by co-extrusion and composite molding.

5. A high-rib helical bellows as claimed in claim 4, wherein: when the body and the stud are compounded in a co-extrusion mode, a co-extrusion compounding point is arranged between the bottom edge of the body and the bottom of the stud, and a co-extrusion compounding point is arranged between the tops of the two side edges of the body and the side wall of the stud.

6. A high-rib helical bellows as claimed in claim 1, wherein: the height from the connecting point between the top of the two side edges of the body and the side wall of the stud to the bottom of the stud is not less than 75% of the height of the whole stud.

7. A high-rib helical bellows as claimed in claim 1, wherein: the cross section of the stud is in a strip shape, and can also be in a trapezoid shape with a wide lower part and a narrow upper part.

8. A high-rib helical bellows as claimed in claim 1, wherein: the two side edges of the body are arc-shaped edges and can also be straight edges.

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