CN101718375B

CN101718375B - Steel belt reinforced composite strip for spiral corrugated plastic steel winding pipe

Info

Publication number: CN101718375B
Application number: CN200910109724.9A
Authority: CN
Inventors: 郑能欢
Original assignee: HUAHAN TECHNOLOGY CO LTD
Current assignee: HUAHAN TECHNOLOGY CO LTD
Priority date: 2009-11-17
Filing date: 2009-11-17
Publication date: 2021-03-19
Anticipated expiration: 2029-11-17
Also published as: CN101718375A; WO2011060695A1

Abstract

The invention relates to a steel belt reinforced composite belt material for a spiral corrugated plastic steel winding pipe, which at least comprises a belt material unit, wherein the belt material unit comprises a base part and a convex part, and the convex part and the base part are connected together to form the belt material unit. The belt material units can be freely combined and used according to conditions, and pipelines with various pipe diameters can be conveniently processed; in addition, the strip unit can eliminate transverse deformation in the welding process; the pipeline formed by the strip unit has stable structure and considerable strength, and can provide the quality and reliability of the pipe, so that the strip can be widely applied to the manufacture of various pipelines.

Description

Steel belt reinforced composite strip for spiral corrugated plastic steel winding pipe

Technical Field

The invention relates to a plastic steel spiral corrugated pipe, in particular to a strip material of the plastic steel spiral corrugated pipe.

Background

The plastic pipeline is used as a pipe material for building and daily use, is widely applied to laying construction of pipelines, cables and the like, needs to strengthen the strength of the plastic pipeline in a plurality of application places, currently, an outward convex rib-shaped reinforcing structure is often adopted to improve the capacity of the pipeline for bearing external pressure, materials are saved, and the pipeline is called as a spiral corrugated pipe.

The helical bellows is primarily characterized in that its outer wall has an outer convex bead structure comprising a cross-section having a suitably open curved form. The material of the rib-shaped reinforcing structure comprises plastic, plastic-steel composite and composite of various materials. The outer convex rib structure is helically wound around the tube wall, which is also the source of the name of the helical bellows. The manufacturing process of the spiral corrugated pipe comprises the steps of bending a metal strip rolled into a required section shape to be prefabricated into a corresponding spiral winding shape, then winding the metal strip, a plastic core pipe formed by extruding a sheet material and spirally winding the sheet material, and an outer layer coating plastic layer formed by extruding the sheet material and spirally winding the sheet material layer by layer, and fusing the outer layer coating plastic layer and the outer layer coating plastic layer into the reinforced spiral corrugated pipe with the integral structure.

At present, the adopted spiral corrugated pipes are manufactured by adopting the manufacturing method of firstly extruding sheets and then heating and fusing, the spiral corrugated pipes often have certain specifications or models, and are cut in construction so as to be suitable for different construction requirements, and thus, the waste of pipes is often caused.

Therefore, the strip of the helical bellows is the key of the manufacture, under the normal condition, the strip of the helical bellows adopts the structural style that one or more reinforcing ribs are arranged on the sheet, two sections of the sheet can be jointed by hot fusion, and the reinforcing ribs form the reinforcement and protection of the tube, however, the structure needs to be provided with a rigid belt in the reinforcing ribs in the processing and manufacturing process to increase the reinforcement and protection effects of the reinforcing ribs, so that in the process of forming the helical bellows, the rigid belt is favorable for the reinforcing ribs, but the difficulty is inevitably brought by helical coiling, the transverse stress of the helical bellows is increased, transverse deformation is generated, certain difficulty is brought to the manufacture of the helical bellows, the control is not good, and even the adverse effect is brought to the strength of the helical bellows.

Disclosure of Invention

Based on the above, the invention aims to provide a plastic steel helical corrugated pipe strip structure which can be produced by adopting a one-step extrusion method. The structure can improve the production efficiency and ensure the reliability of the pipe.

Another object of the present invention is to provide a steel strip reinforced composite strip for a spiral corrugated plastic-steel wound pipe, which can effectively eliminate the transverse stress during the processing of the spiral corrugated pipe, improve the processing efficiency, reduce the investment of equipment, and reduce the manufacturing cost.

The technical scheme of the invention is realized in such a way;

a steel belt reinforced composite strip for a spiral corrugated plastic steel winding pipe comprises a plastic base plate and an outer convex rib-shaped reinforcing structure, wherein the section of the base plate extends out of one side of the base plate;

the upper side of the bearing part is provided with a bearing surface lower than the upper surface of the substrate, the lower side of the bearing part is provided with a flexible cutting with an opening in the middle and a mushroom-shaped head;

the joint part is correspondingly provided with a cutting groove with the cross section shape which is embedded with the head mushroom shape of the cutting, and a gap is ensured between the matching surfaces when the cutting is matched with the cutting groove;

when the opening side of the outer convex rib-shaped reinforcing structure is in lap joint with the lower side of the base plate, the inserting strip is matched with the inserting strip groove, and the lower surface of the free end of the base plate is matched with the bearing surface;

the matching of the inserting strip and the inserting strip groove ensures that self-locking matching is realized; when the composite strip is used for winding and pipe making, the head of the insertion strip is inserted into the insertion strip groove to extrude the cylindrical extrusion welding material preset in the insertion strip groove, and the head of the insertion strip blocks the opening of the insertion strip groove to form a dispersion space of the extrusion welding material.

The base plate downside includes a plurality of evagination inclined planes, when the opening side of evagination rib form additional strengthening constructs with this base plate downside overlap joint cooperation, these a plurality of evagination inclined planes respectively correspond with the protruding chamber internal side surface of evagination rib form additional strengthening is joggled mutually.

In the steel strip reinforced composite strip for the spiral corrugated plastic steel winding pipe, the number of convex cavities of the convex rib-shaped reinforcing structure is 1-5.

In the steel strip reinforced composite strip for the spiral corrugated plastic-steel wound pipe, the base plate comprises the composite braided strip reinforcing layer.

In the steel strip reinforced composite strip for the spiral corrugated plastic steel winding pipe, the lower side of the base plate comprises a plurality of convex inclined surfaces, and when the opening side of the convex rib-shaped reinforcing structure is in lap joint with the lower side of the base plate, the plurality of convex inclined surfaces are respectively matched with the inner side surfaces of convex cavities of the convex rib-shaped reinforcing structure correspondingly.

In the steel strip reinforced composite strip for the spiral corrugated plastic-steel wound pipe, each inclined surface of the plurality of convex inclined surfaces is provided by a short inclined reinforcing rib.

The invention has the advantages that:

1. the belt material units can be freely combined and used according to the situation, so that the processing of pipelines with various pipe diameters is facilitated;

2. a strip unit facilitating elimination of lateral deformation during formation of the duct by the combination of the projections and the base;

3. the pipeline formed by the strip units has a stable structure and considerable strength, and can provide the quality and reliability of the pipe;

4. the manufacturing cost of the spiral corrugated pipe is reduced.

Drawings

FIG. 1 is a sectional view of a plastic steel-wound pipe strip of an embodiment 1 of the invention,

FIG. 2 is a schematic view of the plastic steel wound pipe strip of embodiment 1 of the present invention,

FIG. 3 is a schematic view of a pipe material according to an embodiment 1 of the plastic-steel wound pipe strip of the present invention,

FIG. 4 is a sectional view of a plastic steel wound pipe strip of example 2 of the invention,

FIG. 5 is a sectional view of a plastic steel wound pipe strip of example 3 of the present invention,

FIG. 6 is an exploded view of the plastic steel wound pipe strip of example 3 according to the present invention,

FIG. 7 is a sectional view of a plastic steel wound pipe strip of example 4 of the present invention,

FIG. 8 is a sectional view of a plastic steel wound pipe strip of example 5 of the present invention,

FIG. 9 is a sectional view of a plastic steel wound pipe strip of example 6 of the present invention,

FIG. 10 is a sectional view of the plastic steel-wound pipe strip of example 7 of the present invention.

Detailed Description

The following detailed description of the embodiments of the invention refers to the accompanying drawings.

Fig. 1 to 3 show an embodiment 1 of the plastic-steel wound pipe strip according to the present invention.

The strip body 1 comprises a base plate 10 and an outer ribbed reinforcing structure 20. The base plate 10 is made of plastic, the outer convex rib-shaped reinforcing structure 20 is a continuous metal reinforcing body with an opening in an arch-shaped outer convex belt, specifically, the outer convex rib-shaped reinforcing structure 20 extends from the base plate 10 and is bent to protrude towards one side of the base plate 10 to form a convex cavity 30, the metal reinforcing body 40 is arranged in the outer convex rib-shaped reinforcing structure 20, and a joint part 50 is arranged at the outer side of the outer convex rib-shaped reinforcing structure 20 so that the belt material bodies 1 can be mutually jointed; the joint of the outer convex rib-shaped reinforcing structure 20 and the base plate 10 is provided with a socket 60, the height of the socket 60 is slightly lower than that of the base plate 10, and the height of the socket 60 is consistent with that of the joint 50, so that the assembly of the strips is facilitated. The metal reinforcing body 40 is made of metal material, and plastic is uniformly coated outside the metal reinforcing body. As shown in fig. 2 and 3, when the strip material bodies 1 are spliced, the joint part 50 is lapped on the lower part of the inner side of the base plate 10 of the adjacent strip material body, and the bearing part 60 supports the lower part of the outer side of the base plate 10 of the adjacent strip material body, so that the outer convex rib-shaped reinforcing structure 20 forms a closed convex cavity 30.

In this embodiment, the plastic material is polyethylene, and the metal material is a steel strip. The base plate 1 and the outer convex rib-shaped reinforcing structure 20 are connected in a split manner during manufacturing and are extruded at one time. Thus the strip can extend infinitely along the length direction and can be continuously wound. The base plate is spirally wound by taking the central line of the required pipe as an axis, and is lapped on the bearing part 60 of the outer convex rib-shaped reinforcing structure 20 of the adjacent strip to form the inner wall of the pipe, and the outer convex rib-shaped reinforcing structure 20 is spanned on the inner wall of the pipe to form the spiral corrugated pipe. The base plate 10 and the outer ribbed reinforcing structure 20 are connected in a split manner, and when the outer ribbed reinforcing structure is bent and wound, large transverse deformation can be eliminated due to the open form adopted by the strip.

This way of eliminating the lateral deformation is applicable in both cases. In one case, after the strips are extruded, the strips are cooled, shaped, wound on a reel and then transported to a pipe construction site to be wound into a pipe, and the overlapped parts between the adjacent strips can be welded and fused through an extrusion welding strip material. The strip material is wound on the winding drum, and a certain amount of elastic stretching can be performed in the transverse direction of the strip material convex rib-shaped reinforcing structure in the transportation and unwinding processes, so that the serious deformation of the strip material can not be caused, and the winding of the strip material is not influenced. In another case, the strip is extruded, shaped directly by rolling without cooling, bent and spirally wound into a tube. The lap joint parts between the adjacent strips are thermally and seamlessly fused without extrusion welding. When the strip is bent and spirally wound into a tube, the lateral deformation of the outer ribbed reinforcing structure is eliminated by the open form adopted by the strip. Therefore, the process method is more flexible, the production efficiency is higher, the equipment investment is less, and the short-term and long-term quality and reliability of the pipe can be effectively ensured and improved.

FIG. 4 shows an embodiment 2 of the plastic-steel wound pipe strip of the present invention. The base plate 11 part is provided with a reinforcing layer 71 extruded with the belt material once, in the embodiment, the material of the reinforcing layer 71 is a composite woven belt, one function of the reinforcing layer is to play a role of supporting the extruded material of the base plate in the process of hot winding and fusing of the belt material, the other function of the reinforcing layer is to reinforce the strength and the breakage resistance of the base plate, and the extruded material of the base plate is saved. In this embodiment, the remaining structures, i.e., the outer bead reinforcement structure 21, the convex cavity 31, the steel strip 41, the joint part 51, and the receiving part 61, are the same as those shown in fig. 1, and are not described again.

Fig. 5 to 6 show an embodiment 3 of the plastic-steel wound pipe strip according to the present invention. An outer convex rib-shaped reinforcing structure 22 extends from one end of the base plate 12, a steel belt 42 is arranged in the outer convex rib-shaped reinforcing structure 22 and is subjected to bow-shaped bending to form two convex cavities 32 (namely wave troughs), a flexible butt joint self-locking inserting strip 122 with an opening in the middle is arranged below the bearing part 62 on the side opposite to the base plate 12 and the convex cavities, and meanwhile, a flexible butt joint self-locking inserting strip groove 521 is arranged on a joint part 52 at the outer end of the outer convex rib-shaped reinforcing structure 22 and is embedded with the flexible butt joint self-locking inserting strip 122 when the belt materials are lapped; the base plate 12 is further provided with a plurality of convex inclined planes 121 on one side provided with the lap joint part, the inclined directions of the convex inclined planes 121 are staggered respectively, so that the convex inclined planes are joggled with the concave inclined planes of adjacent strips at one end of the base plate, the cylindrical extrusion welding material 72 is adopted for welding, the lap joint between the strips is firm, and when external pressure or impact is borne, the welding seam cracking or leakage caused by local stress concentration can be eliminated through elastic deformation.

In the separated connection part of the base plate 12 and the outer convex rib-shaped reinforcing structure 22, a flexible butt joint self-locking inserting strip 122 with an opening in the middle is matched with a flexible butt joint self-locking inserting strip groove 521 of an adjacent strip material, and a cylindrical extrusion welding material 72 is welded. The cylindrical extrusion weld material is received by the butt self-locking insertion groove 521. The inner width of the flexible butt self-locking insertion groove 521 is larger than the outer diameter of the cylindrical extrusion welding material 72. The matched side surfaces between the flexible butt joint self-locking inserting strip and the flexible butt joint self-locking inserting strip groove are provided with proper gaps and can be fastened in a self-locking way. The structure is firm in locking and large in welding contact area, and can block scattered welding materials, so that the sealing performance of the lap joint surface is improved. The fit clearance between the flexible butt joint self-locking inserting strip and the flexible butt joint self-locking inserting strip groove can eliminate dislocation when the strips are lapped in the winding process, so that the positioning is accurate. The overlapping portions of the valleys of the outwardly projecting rib-like reinforcing structure 22 and the base 12 may be left unwelded, making the arcuate outwardly projecting rib-like reinforcing structure more flexible. The flexible butt joint self-locking inserting strip and the flexible butt joint self-locking inserting strip groove can ensure the sealing and the strength of the strip joint and can avoid the failure caused by insufficient longitudinal flexibility of the strip joint. The base plate is also provided with short inclined reinforcing ribs which are adaptive to the section shape of the inner surface of the arched opening and extend along the length direction of the strip, so that the strength of the base plate is enhanced, and the mutual interference caused by dislocation when the strip is lapped can be further eliminated in the winding process. The pipe wound by the belt structure has certain longitudinal flexibility, and can better overcome the longitudinal deformation of the pipe caused by uneven settlement after the underground is buried. In this embodiment, because the sectional shape of the strip is relatively complex, and the requirement for shaping accuracy is relatively high, the production process of the strip can be extrusion, cooling and shaping, and then winding into a tube.

Fig. 7 to 10 show other embodiments of the plastic-steel wound pipe strip according to the present invention.

These several embodiments are similar in structure, and therefore, the same component is labeled with a tail variation on the label to distinguish different embodiments, for example, the substrate label shown in fig. 7 is 13, the substrate label in fig. 8 is 14, the substrate label in fig. 9 is 15, and the substrate label in fig. 10 is 16. In these methods, the metal strip is punched or opened to prevent the

metal reinforcing members

43, 44, 45, 46 from colliding with the plastic joint. The punching holes and the openings are used for connecting the plastic on the two sides of the metal strip through the punching holes or the openings, so that the combination between the extruded plastic and the metal strip is enhanced, and the parts which are seriously deformed when the metal strip is bent and spirally wound are dispersed and weakened. When the pipe is cut off, the sawing of metal can be reduced by punching or opening on the metal strip, and the smoothness of the cut of the pipe is ensured. The proper application of the punching hole and the opening can also lead the base plate and the outer convex rib-shaped reinforcing structure to adopt an integrated closed structure form. The outer fillet reinforcement is in the form of a curved opening with a metal reinforcement, such as a continuous metal reinforcement with an arcuate outer fillet opening, and a discontinuous metal reinforcement with engaging tabs at either end of the arcuate outer fillet opening. The reinforcing body can also adopt a composite flexible material which has the elasticity modulus and the strength which are far higher than those of plastics and is more suitable for winding and forming the strip structure.

As shown in fig. 7, the base plate 13 and the outer ribbed reinforcing structure 23 are in an integrated closed structure, the steel strip 43 penetrates through the valleys of the two outer ribbed reinforcing structures 23 to form two convex cavities 33, the cross section of each convex cavity 33 is triangular, and a joint part 53 is arranged on one side of the base plate 13 to facilitate the overlapping of the strips.

The form of the structure shown in fig. 8 is substantially the same as that shown in fig. 7, except that the steel strip 44 is not continuous, but is a structure with a break in the middle, so that the steel strip 44 covers only the convex cavities 44, and the cross-section of the convex cavities 43 is triangular as in fig. 7.

FIG. 9 shows the same construction as that shown in FIG. 8, except that the cross-section of the convex chamber 45 is formed in a more than half circular configuration; the construction of fig. 10 is also the same as that of fig. 8, except that the cross-section of the relief cavity 46 is polygonal with an arcuate apex.

Claims

1. A steel belt reinforced composite belt material for a spiral corrugated plastic steel winding pipe is characterized by comprising a plastic base plate and an outer convex rib-shaped reinforcing structure, wherein the section of the base plate extends out of one side of the base plate;

the matching of the inserting strip and the inserting strip groove ensures that self-locking matching is realized; when the composite strip is used for winding and pipe making, the head of the insertion strip is inserted into the insertion strip groove to extrude the cylindrical extrusion welding material preset in the insertion strip groove, and the head of the insertion strip blocks the opening of the insertion strip groove to form a dispersion space of the extrusion welding material;

2. The steel strip reinforced composite strip for a spirally corrugated plastic-steel wound pipe as claimed in claim 1, wherein the number of convex cavities of said outer convex rib-like reinforcing structure is 1 to 5.

3. A steel strip reinforced composite strip for a spirally corrugated plastic steel wound pipe as claimed in claim 1 wherein said base plate includes a composite braid reinforcing layer therein.

4. The steel strip reinforced composite material for a spirally corrugated plastic-steel wound pipe as claimed in any one of claims 1 to 3, wherein each of said plurality of outwardly convex slopes is provided by one short-pitched reinforcing bar.