WO2011060695A1

WO2011060695A1 - Steel strip reinforced composite belt for helically corrugated plastic-steel winding pipe

Info

Publication number: WO2011060695A1
Application number: PCT/CN2010/078576
Authority: WO
Inventors: 郑能欢
Original assignee: 华瀚科技有限公司
Priority date: 2009-11-17
Filing date: 2010-11-09
Publication date: 2011-05-26
Also published as: CN101718375A; CN101718375B

Abstract

A steel strip reinforced composite belt for helically corrugated plastic-steel winding pipe, at least has a belt unit (1) comprising a base part (10) and a bump (20), which are connected together to form the belt unit (1). The belt units (1) can be combined freely for use according to the circumstances and make it easy to machine the pipes of different diameters. The lateral deformation can be eliminated during the welding process of the belt unit (1). The pipe formed by the belt unit (1) has a stable structure, high quality, and can guarantee the quality and reliability of the pipe.

Description

Steel belt reinforced composite strip for spiral corrugated steel coiled pipe

The invention relates to a plastic steel spiral corrugated pipe, in particular to a plastic steel spiral corrugated pipe strip. Background technique

As a kind of pipe used in construction and daily use, plastic pipes are widely used in the laying of pipes, cables, etc. In many applications, plastic pipes need to strengthen their own strength. At present, external convex reinforcement structures are often used to improve The ability of the pipeline to withstand external pressure and to save material is called a spiral bellows.

The main feature of the spiral bellows is that the outer wall has a convex rib, and the outer rib structure includes a cross section in the form of a suitable opening curve. The material of the ribbed reinforcing structure includes plastic, plastic steel composite and composite of various materials. Its convex rib structure is spirally wound on the pipe wall, which is also the source of the name of the spiral bellows. The spiral corrugated pipe is made by bending a metal strip rolled into a desired cross-sectional shape into a corresponding spiral coil shape, and then spirally winding the plastic core tube with the first extruded sheet and extruding first. The outer spiral-wrapped outer layer of the sheet is wrapped with a plastic layer layer by layer, and is heat-melted into a reinforced spiral corrugated tube of a unitary structure.

The spiral corrugated pipes currently used are the above-mentioned manufacturing methods using the first extruded sheet and then reheated. Such spiral corrugated pipes often have certain specifications or models, and are to be cut during construction to suit different construction requirements. In this way, it often causes waste of pipes.

Therefore, the strip of the spiral corrugated pipe is the key to the production. Generally, the strip of the spiral corrugated pipe is in the form of one or more reinforcing ribs on the sheet, and the two sections of the sheet can be joined by heat fusion. The ribs constitute the strengthening and protection of the pipe itself. However, in this process, in the ribs, it is necessary to set the ribs to increase the reinforcement and protection effect of the ribs, thus forming the spiral bellows. In the process, although the belt is beneficial to the reinforcing ribs, it is difficult to carry out the spiral winding. The lateral stress of the spiral corrugated tube increases, causing lateral deformation, which brings certain difficulties to the manufacture of the spiral corrugated tube, and the control is not good, even It will have an adverse effect on the strength of the spiral bellows itself.

Summary of the invention

Based on this, it is an object of the present invention to provide a steel-steel spiral corrugated pipe strip structure which can be produced by a single extrusion process. This structure can increase 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 steel-wrapped tube, which can effectively eliminate lateral stress during processing of the spiral corrugated tube, improve processing efficiency, and reduce equipment investment, Reduce production costs.

The technical solution of the present invention is implemented as follows:

A steel strip reinforced composite strip for a spiral corrugated steel-wound tube, comprising at least one strip unit, the belt unit comprising at least a base portion and a convex portion, the base portion being a plate-like structure, at least one side of which is provided a convex portion having an inner cavity.

The convex portion has one side connected to the base portion and the other side has an open structure and has a overlapping end, and the overlapping end can be connected with the base portion during the forming of the pipeline, and the structure is convenient for forming the pipeline process. Eliminate lateral deformation.

The convex portion is disposed on the base and forms a hollow structure with the base.

The basic portion is provided with at least one convex portion on at least one side thereof.

Specifically, the strip unit comprises a separately connected substrate and an outer rib-shaped reinforcing structure, the substrate is spirally wound with the center line of the desired tube as an axis, and is overlapped at the bottom of the outer rib-shaped reinforcing structure of the adjacent strip. The inner wall of the pipe is formed, and the outer rib-shaped reinforcing structure is pressed over the inner wall of the pipe. When it is bent and wound, the large lateral deformation can be eliminated due to the open form adopted by the strip. The overlapping edges of the adjacent strip edges and the outer rib-shaped reinforcing structure and the substrate may be formed by extrusion welding, rolling, heat fusion or bonding to form a continuous spiral corrugated outer rib. A spiral corrugated pipe of a reinforcing structure and a solid wall tubular structure.

The outer rib-shaped reinforcing structure mainly refers to a cross section in the form of an opening curve with a metal structural reinforcing body, and includes a structural form of a continuous metal reinforcing body having an arcuate outer convex band opening, and an arcuate outer convex band having an engaging end at both ends The structural form of the discontinuous metal reinforcement of the fin, or a structural form having a semi-elliptical cross section, a substantially semi-elliptical cross section, a spherical or hemispherical structure, and the like.

The arcuate protrusion may be an open trapezoid, a rectangle, a square, a semicircle, a 3/4 circle, and a rounded curve.

The above-mentioned outer rib reinforcing structure has more than one. According to the lateral length of the strip unit, it is usually set to 1-3, and in particular, it can be set to 5, that is, the stripping unit can be completely digested during the winding process. The lateral stress.

The material of the substrate and the outer rib-like reinforcing structure may be a plastic or a multi-layer composite material with a metal reinforcement and/or a reinforcing layer. The plastic can be polyethylene, polypropylene, polyvinyl chloride, and other suitable plastic materials.

The metal reinforcement material may be a steel strip or other metal material and a composite flexible material having a modulus of elasticity and strength much greater than that of the plastic.

The material of the reinforcing layer is a fiber woven layer (such as glass fiber, carbon fiber and other anisotropic polymer material) having a modulus of elasticity and strength exceeding that of the tape itself, plastic or wire, tape, mesh and other suitable materials.

The reinforcing layer can be extruded with the strip at one time or externally. The utility model is characterized in that the substrate and the outer rib-shaped reinforcing structure are open structures connected by separate bodies, the metal reinforcement is uniformly coated with plastic outside, and the whole body is extruded into a strip at one time, and the strip is spirally wound, extrudable and welded, and pressed. The pressure is thermally fused or bonded into the tube. Therefore, the process is more flexible and the production efficiency is higher. Less investment, and can effectively ensure and improve the short-term and long-term quality and reliability of the pipe.

When the pipe needs better longitudinal flexibility to overcome the uneven settlement after the buried, the lap joint of the two ends of the strip and the adjacent strip can also be connected and docked with a certain flexibility. The self-locking insert fits together to ensure the seal and strength of the joint and to avoid failure caused by insufficient longitudinal flexibility of the pipe. In this case, the overlapping portions of the valleys of the outer rib-shaped reinforcing structure and the substrate may not be welded or bonded. The strip production process can be extruded first, cooled and shaped, and then wound into a tube.

When the pipe diameter of the pipe is small, the metal reinforcement used is thin, or the treatment such as punching and opening on the metal strip is used, the distortion of the bending is insufficient to cause the metal reinforcement to collide with the plastic. The strip substrate and the outer rib-like reinforcing structure may also be in the form of an integrated closed structure.

The advantages of the invention are:

1. Through the strip unit, it can be used freely according to the situation, which is convenient for processing pipes of various pipe diameters;

2, the strip unit, through the combination of the convex portion and the base, facilitates the elimination of lateral deformation during the formation of the pipeline;

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

4. Reduce the manufacturing cost of the spiral bellows. DRAWINGS

1 is a cross-sectional view of a strip of plastic steel wound pipe of the present invention;

2 is a schematic view showing the winding and lap joint of the steel-wound pipe strip of the present invention;

3 is a schematic view of a pipe of the first embodiment of the steel-wound pipe strip of the present invention;

Figure 4 is a cross-sectional view of a strip of the steel strip wound pipe strip of the present invention,

Figure 5 is a cross-sectional view of the strip 3 of the steel-wound tube strip of the present invention,

Figure 6 is a perspective view of the winding lap joint of the steel-wound pipe strip of the present invention;

Figure 7 is a cross-sectional view of the strip of the fourth embodiment of the steel-wound pipe strip of the present invention,

Figure 8 is a cross-sectional view of the strip of the plastic steel wound pipe strip of the present invention,

Figure 9 is a cross-sectional view of the strip of the plastic steel wound pipe strip of the present invention,

Figure 10 is a cross-sectional view showing a strip of Example 7 of a plastic-steel-wound tube strip of the present invention.

detailed description

The implementation of the present invention will be described in detail below with reference to the accompanying drawings.

1 to 3 are a first embodiment of a plastic-steel-wound tube strip of the present invention. The strip body 1 includes a substrate 10 and an outer rib-like reinforcing structure 20. The material of the substrate 10 is plastic, and the outer convex reinforcing structure 20 is a structural form of a continuous metal reinforcing body having an arcuate outer convex opening. Specifically, the outer convex reinforcing structure 20 extends from the substrate 10 toward One side of the substrate 10 is bent and bent to form a convex cavity 30. The outer reinforcing rib-shaped reinforcing structure 20 is provided with a metal reinforcing body 40. On the outer side of the outer convex reinforcing structure 20, there is a joint portion 50 for the strip. The body 1 can be joined to each other; the joint of the outer rib-shaped reinforcing structure 20 and the substrate 10 has a receiving portion 60, the height of the receiving portion 60 is slightly lower than the height of the substrate 10, and the height of the receiving portion 60 is consistent with the joint portion 50, It is convenient for the strip to be assembled. The metal reinforcement 40 is a metal material which is uniformly coated with plastic. 2 and 3, when the strip body 1 is spliced, the joint portion 50 overlaps the lower portion of the inner side of the adjacent strip body substrate 10, and the receiving portion 60 supports the outer side of the substrate 10 of the adjacent strip body. In the lower portion, the outer rib-like reinforcing structure 20 constitutes a closed convex cavity 30.

In this embodiment, the plastic material is polyethylene and the metal material is steel strip. The substrate 1 and the outer rib-like reinforcing structure 20 are connected separately at the time of production, and are extruded at one time. Thus, the strip can extend infinitely along the length direction and is continuously wound. The substrate is spirally wound with the center line of the desired pipe as the axis, and is overlapped at the receiving portion 60 of the outer rib-shaped reinforcing structure 20 of the adjacent strip to form the inner wall of the pipe, and the outer rib-shaped reinforcing structure 20 is pressed against the inner wall of the pipe. It becomes a spiral corrugated pipe. The substrate 10 and the outer rib-shaped reinforcing structure 20 are connected separately, and when the outer rib-shaped reinforcing structure is bent and wound, the large lateral deformation can be eliminated by the open form adopted by the strip.

This way of eliminating lateral deformation is suitable for both situations. In one case, after the strip is extruded, it is cooled and shaped, wound on a reel, and then transported to a pipe construction site to be wound into a tube. The overlapping portion between adjacent strips can be welded by extruding the welding rod material. Fusion. The strip can be wound on the reel, and the lateral rib-like reinforcing structure of the strip can be stretched in a certain amount during the transport and unwinding process, so that the strip is not seriously deformed and the strip is entangled. In another case, after the strip is extruded, it does not need to be cooled and shaped, directly shaped by rolling, and bent and spirally wound into tubes. The lap joints between adjacent strips are thermally fused seamlessly and do not require extrusion welding. When the strip is bent and spirally wound into a tube, the lateral deformation of the outer rib-like reinforcing structure can be eliminated by the open form of the strip. Therefore, the process 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.

Figure 4 is a second embodiment of the steel-wound tube strip of the present invention. The substrate 11 has a reinforcing layer 71 which is extruded once from the strip. In the embodiment, the material of the reinforcing layer 71 is a composite braid, and one of the functions is that the strip can be thermally wound and fused. It plays the role of supporting the extruded material of the substrate, and the second function is to strengthen the strength and damage resistance of the substrate, and save the substrate extrusion material. In this embodiment, the rest of the structure, the outer rib-like reinforcing structure 21, the convex cavity 31, the steel strip 41, the joint portion 51, and the receiving portion 61 are the same as those shown in Fig. 1, and will not be described again.

5 to 6 are a third embodiment of the steel-wound tube strip of the present invention. One end of the substrate 12 extends from the outer rib-shaped reinforcing structure 22, and the outer rib-shaped reinforcing structure 22 is provided with a steel strip 42 and is bow-shaped to form two convex cavities 32 (ie, troughs) on the substrate 12 and the convex cavity. On one side, the lower portion of the receiving portion 62 has a flexible butted self-locking insertion with an opening in the middle. The strip 122, at the same time, the joint portion 52 of the outer end of the outer rib-shaped reinforcing structure 22 is provided with a flexible butted self-locking insert groove 521, and the flexible butt-in self-locking insert groove 521 is fitted with the same when the strip is lapped. The substrate 12 is provided with a plurality of convex inclined surfaces 121 on the side where the overlapping portion is disposed, and the inclined directions of the convex inclined surfaces 121 are staggered so that one end of the substrate adopts a convex inclined surface and The concave bevels of adjacent strips are twisted together, and the cylindrical extrusion welding material 72 is welded to make the strips firmly adhered. When subjected to external pressure or impact, the local stress concentration can be eliminated by elastic deformation. The weld is cracked or leaking.

In the separated portion of the substrate 12 and the outer rib-shaped reinforcing structure 22, a flexible butt-joined insert 122 having an opening in the middle is engaged with the flexible butt-locking insert groove 521 of the adjacent strip, and a cylinder The extruded solder material 72 is welded. The cylindrical extruded weld material is received by the butted self-locking insert groove 521. The inner width of the flexible butted self-locking insert groove 521 is greater than the outer diameter of the cylindrical extruded weld material 72. The flexible butt-joined self-locking insert and the flexible butted self-locking insert groove have appropriate gaps on the mating side, and can be self-locking and fastening. Such a structure is tightly locked, has a large welding contact area, and can block the welded material to be squeezed, thereby increasing the sealing property of the lap joint. The matching gap between the flexible butt-locking self-locking insert and the flexible butted self-locking insert groove can eliminate the misalignment when the strip is overlapped during the winding process, so the positioning is accurate. The overlapping portions of the valleys of the outer rib-shaped reinforcing structure 22 and the substrate 12 may not be welded, so that the arcuate outer rib-like reinforcing structure is more flexible. The flexible butt-in self-locking insert and the flexible butt-in self-locking insert groove ensure the sealing and strength of the strip joint and avoid the failure of the longitudinal joint flexibility of the strip joint. The substrate also adopts a short oblique reinforcing rib which is adapted to the cross-sectional shape of the inner surface of the arcuate opening and extends along the longitudinal direction of the strip, which not only enhances the strength of the substrate, but also further eliminates the overlap of the strip during the winding process. Mutual interference caused by misalignment. The pipe material wound by the strip structure has a certain longitudinal flexibility, which can better overcome the longitudinal deformation of the pipe caused by uneven settlement after the embedding. In the present embodiment, since the cross-sectional shape of the strip is relatively complicated, the setting precision is required to be high, and the production process of the strip can be first extruded, and then cooled into a tube after being cooled and shaped.

Figures 7 through 10 are additional embodiments of the steel-wound tube strip of the present invention.

The embodiments are similar in structure, so the identification of the same components is performed on the logo in the form of a tail change to distinguish different embodiments. For example, the substrate identifier shown in FIG. 7 is 13, and the substrate identifier of FIG. 8 is 14 The substrate designation of 9 is 15 and the substrate designation of Figure 10 is 16. In these methods, the metal strip is treated with punching, opening, etc., so that the distortion during bending and spiral winding is insufficient to cause the metal reinforcing bodies 43, 44, 45, 46 to collide with the plastic joint. The function of the punching and the opening is to connect the plastic on both sides of the metal strip through the punching or opening, thereby strengthening the bonding between the extruded plastic and the metal strip, and causing the deformation of the metal strip to be severely deformed when bent and spirally wound. The part is dispersed and weakened. When the pipe is cut, the sawing of the metal can be reduced by punching or opening on the metal strip to ensure the flatness of the pipe cut. Appropriate use of punching and opening also allows the substrate and the outer rib-like reinforcing structure to adopt an integrated closed structure. The outer rib-like reinforcing structure is a cross section in the form of an opening curve with a metal structural reinforcing body, such as a continuous metal reinforcing body having an arcuate outer convex opening, and an arcuate outer convex opening having both ends Non-continuous metal reinforcement of jointed fins The structural form of the body. The reinforcing body can also adopt a modulus of elasticity and strength much larger than that of the plastic, and is more suitable for the composite flexible material in which the strip structure is wound and formed.

As shown in FIG. 7, the substrate 13 and the outer rib-shaped reinforcing structure 23 adopt an integrated closed structure, and the steel strip 43 penetrates into the troughs of the two outer rib-shaped reinforcing structures 23 to form two convex cavities 33, and the convex cavity The cross section of the 33 is triangular, and one side of the substrate 13 is provided with a joint portion 53 to facilitate the tying of the strip.

The structure shown in Fig. 8 is basically the same as that shown in Fig. 7. The difference is that the steel strip 44 is not continuous, but is broken in the middle. Therefore, the steel strip 44 only covers the convex cavity 44, and the convex cavity The cross section of 43 is triangular as in Fig. 7.

As shown in FIG. 9, the structure is the same as that shown in FIG. 8, and the difference is that the convex cavity 45 has a cross-section forming a large half-circular structure; the structure of FIG. 10 is also the same as that of FIG. The cross section of the convex cavity 46 is a polygon having a curved top.

Claims

Claim

A steel strip reinforced composite strip for a spiral corrugated steel-wound tube, characterized in that the composite strip comprises at least one strip unit, the strip unit comprising a base portion and a convex portion, the convex portion being connected to the base portion Together, they form a strip unit.

The steel strip reinforced composite strip for a spiral corrugated steel-wound tube according to claim 1, wherein the convex portion has one side connected to the base and the other side has an open structure, and There is a lap end that can be connected to the base during the formation of the pipe.

A steel strip reinforced composite strip for a spiral corrugated steel-wound tube according to claim 1, wherein said convex portion is provided on the base portion to form a hollow structure with the base portion.

A steel strip reinforced composite strip for a spiral corrugated steel-wound tube according to claim 2, wherein the strip unit comprises a separately connected substrate and an outer rib-shaped reinforcing structure, and the convex portion is The outer rib-shaped reinforcing structure, the base is a substrate, and the substrate is spirally wound with the center line of the required pipe as an axis, and is lapped on the bottom of the outer rib-shaped reinforcing structure of the adjacent strip to form the inner wall of the pipe, The rib-like reinforcing structure is pressed across the inner wall of the pipe.

A steel strip reinforced composite strip for a spiral corrugated steel-wound tube according to claim 4, wherein said outer rib-shaped reinforcing structure means that the cross section of the metal structure reinforcing body has an opening. a curved structure comprising a structural form of a continuous metal reinforcement having an arcuate outer band opening, a structural form of a discontinuous metal reinforcement having an arcuate outer band opening at both ends thereof, or a cross section Semi-elliptical structural form, structural form with a cross-section that is approximately semi-elliptical, spherical or hemispherical.

The steel strip reinforced composite strip for a spiral corrugated steel-wound tube according to claim 5, wherein the arcuate protrusion is an open trapezoid, a rectangle, a square, a semicircle, a 3/4 circle, and a round curve. Any of the arched shapes.

A steel strip reinforced composite strip for a spiral corrugated steel-wound tube according to claim 5, wherein said outer rib reinforcing structure is provided with 1-5.

A steel strip reinforced composite strip for a spiral corrugated steel-wound tube according to claim 7, wherein the material of the substrate and the outer rib-shaped reinforcing structure is plastic or has a metal reinforcing body. And/or a multi-layer composite of reinforcing layers, the multi-layer composite of the reinforcing layer is any one of a fiber woven layer having a modulus of elasticity and strength exceeding the strip itself, a plastic or wire, a belt, a mesh, and other suitable materials. .

A steel strip reinforced composite strip for a spiral corrugated steel-wound tube according to claim 8, wherein the reinforcing layer can be extruded once with the strip or externally.

10. The steel strip reinforced composite strip for a spiral corrugated steel-wound tube according to claim 1, wherein either end of the base or one end of the base is provided with a lap joint with the adjacent strip unit. The docking self-locking slot or the docking self-locking insert, the corresponding strip unit has a mating self-locking insert or a docking self-locking slot, and the two cooperate.