A hollow wall composite pipe with steel wire winding and preparation process

Abstract

The invention discloses a hollow wall composite pipe with steel wire winding and a preparation process, and relates to the technical field of hollow wall composite pipes. The composite pipe adopts a hexagonal bottom pipe to spirally wind it into a tubular structure perpendicular to its axial direction. After winding, the side surfaces of adjacent hexagonal bottom pipes are glued together by hot melt adhesive. The first reinforcing steel wire is spirally wound along its axial direction and embedded in the side bonding layer. The upper inclined surfaces are glued by hot melt adhesive and cooled to form a top bonding layer. The second reinforcing steel wire is spirally wound along the axial direction of the hexagonal bottom pipe and embedded in the top bonding layer. The wall of the wound pipe designed by the invention is a hexagonal structure. Not only high-strength steel wires are embedded in the pipe wall, but also multiple high-strength steel wires are embedded in the bonding position of adjacent pipe walls to form a solid "I"-shaped structural steel-plastic combination, which improves the overall ring stiffness and impact resistance of the pipe, has a long service life, and has good economic benefits.

Description

Technical Field

[0001] The invention relates to the technical field of hollow wall composite pipes, and in particular to a hollow wall composite pipe with steel wire winding and a preparation process thereof. Background Art

[0002] As a new composite structure, hollow wall composite pipe has the advantages of light weight, corrosion resistance, long service life, convenient transportation and installation, and fast construction. Therefore, it is widely used in municipal sewage, highways, rainwater discharge and farmland irrigation. It is an ideal substitute for cement pipes, cast iron pipes and fiberglass pipes.

[0003] The hollow wall composite pipe has high-strength steel wire embedded inside the pipe wall to ensure that the steel wire is integrated with the plastic pipe wall. However, the winding pipe of the traditional composite pipe is usually a four-sided rectangular structure, which is unstable. It is found during long-term use that the winding pipe is easily squeezed and deformed into the pipe cavity by external pressure, and has poor pressure resistance, which seriously affects the product quality. Summary of the invention

[0004] The invention provides a hollow wall composite pipe with steel wire winding and a preparation process, which relates to the technical field of hollow wall composite pipes, can effectively solve the above-mentioned problems, has a simple structure and is easy to use.

[0005] The specific technical solution is a hollow wall composite pipe with steel wire winding, including: a hexagonal bottom pipe, a top surface adhesive layer and a side adhesive layer.

[0006] The composite pipe adopts the hexagonal bottom pipe to be spirally wound perpendicular to its axial direction into a tubular structure. After winding, the side surfaces of adjacent hexagonal bottom pipes are glued together by hot melt adhesive and cooled to form the side bonding layer. The first reinforcing steel wire is spirally wound along the axial direction of the hexagonal bottom pipe and embedded in the side bonding layer.

[0007] The upper inclined surfaces of two adjacent hexagonal bottom tubes are glued together by hot melt adhesive and cooled to form the top surface bonding layer. The second reinforcing steel wire is spirally wound along the axial direction of the hexagonal bottom tube and embedded in the top surface bonding layer.

[0008] Furthermore, the interior of the hexagonal bottom tube is hollow, and the cross-sectional shape of the cavity is consistent with the cross-sectional shape of the hexagonal bottom tube, and the two first reinforcing steel wires are symmetrically embedded in the bottom of the cavity.

[0009] Furthermore, the top surface adhesive layer and the upper end surfaces of two adjacent hexagonal bottom tubes are located in the same horizontal plane, forming an inverted triangle structure, in which a plurality of the second reinforcing steel wires are embedded.

[0010] Furthermore, the first reinforcing steel wire and the second reinforcing steel wire are both made of high-strength carbon steel.

[0011] A process for preparing a hollow wall composite pipe with steel wire winding, the steps are as follows:

[0012] S1. Feed the resin raw material into the profile extruder from the raw material feed port, and pass the first reinforcing steel wire into the profile extruder from the first reinforcing steel wire feed port and extend it into the profile extruder head, and pass the second reinforcing steel wire into the second glue coating device.

[0013] S2. While the profile extruder extrude the hexagonal bottom tube, the first reinforcing steel wire is simultaneously extruded into the inner wall thereof to form a plastic-steel composite tube, and the obtained hexagonal bottom tube is wound on a winding roller.

[0014] S3, while the winding roller is winding the hexagonal bottom tube, it is synchronously moved in the horizontal direction, and one side thereof is coated with glue by the first gluing device, and the adjacent side surfaces are bonded together into a composite tube side wall through the limiting forming piece.

[0015] S4, the glue outlet of the second glue coating device is aligned with the upper inclined surface of the hexagonal bottom tube, and the glue is filled with glue as the winding roller rotates, and at the same time, the surface is flattened by the molding roller.

[0016] Furthermore, the limiting forming part is rotatably connected to the winding roller, and mainly includes: a limiting upper support plate, a limiting spring and a limiting lower support plate. The limiting upper support plate and the limiting lower support plate are connected through a plurality of limiting springs, and the plurality of limiting springs are evenly distributed along the central axis of the limiting forming part.

[0017] Furthermore, a pressure sensor is installed on the limit upper abutment plate and is connected to the controller.

[0018] Further, in step S3, the first circle of the composite tube abuts against the limiting upper abutment plate, and as the winding roller moves in the horizontal direction, the multiple circles of the hexagonal bottom tube rolled on the winding roller gradually squeeze the limiting upper abutment plate, and when the pressure sensor reaches the set value, the controller controls the entire process to stop working, thereby completing the preparation of the composite tube.

[0019] Furthermore, the profile extruder, the second glue coating device and the forming roller are arranged in sequence along the moving direction of the winding roller.

[0020] Due to the adoption of the above technical scheme, compared with the prior art, the wall of the winding pipe designed in the present invention is a hexagonal structure. Not only are high-strength steel wires embedded in the pipe wall, but multiple high-strength steel wires are embedded at the bonding points of adjacent pipe walls to form a solid "I"-shaped structural steel-plastic combination, which improves the overall ring stiffness and impact resistance of the pipe, so that the composite pipe can withstand both large internal pressure and large external pressure, has a long service life, and has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-sectional view of a portion of a hollow wall composite pipe with steel wire winding;

[0022] Figure 2 It is a schematic diagram of the structure of the hexagonal bottom tube in the present invention;

[0023] Figure 3 It is a schematic diagram of the equipment structure of the preparation process of the present invention;

[0024] Figure 4 A schematic structural diagram of the position-limiting forming member in the present invention.

[0025] Description of reference numerals:

[0026] 1. Hexagonal bottom tube, 2. Top adhesive layer, 3. Side adhesive layer, 4. Profile extruder, 5. Winding roller, 6. Positioning forming part, 7. First gluing device, 8. Second gluing device, 9. Forming roller,

[0027] 11. Cavity, 12. First reinforcing wire, 13. Side, 14. Upper slope,

[0028] 21. The second reinforcing steel wire,

[0029] 41. Raw material feed port, 42. Profile extruder head, 43. First reinforcing steel wire feed port,

[0030] 61. Limit upper abutment plate, 62. Limit spring, 63. Limit lower abutment plate. DETAILED DESCRIPTION

[0031] The following describes the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments:

[0032] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0033] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0034] Combination Figure 1-4 A hollow wall composite pipe with steel wire winding includes: a hexagonal bottom pipe 1, a top surface adhesive layer 2 and a side surface adhesive layer 3.

[0035] The composite pipe adopts a hexagonal bottom pipe 1 which is spirally wound perpendicular to its axial direction to form a tubular structure. After winding, the side surfaces 13 of adjacent hexagonal bottom pipes 1 are glued together by hot melt adhesive and cooled to form a side bonding layer 3. The first reinforcing steel wire 12 is spirally wound along the axial direction of the hexagonal bottom pipe 1 and embedded in the side bonding layer 3.

[0036] The upper inclined surfaces 14 of two adjacent hexagonal bottom tubes 1 are glued together by hot melt adhesive and cooled to form a top surface adhesive layer 2 . The second reinforcing steel wire 21 is spirally wound along the axial direction of the hexagonal bottom tube 1 and embedded in the top surface adhesive layer 2 .

[0037] Furthermore, the interior of the hexagonal bottom tube 1 is hollow, and the cross-sectional shape of the cavity 11 thereof is consistent with the cross-sectional shape of the hexagonal bottom tube 1 , and two first reinforcing steel wires 12 are symmetrically embedded in the bottom of the cavity 11 .

[0038] Furthermore, the top surface adhesive layer 2 and the upper end surfaces of two adjacent hexagonal bottom tubes 1 are located in the same horizontal plane, forming an inverted triangle structure, in which a plurality of second reinforcing steel wires 21 are embedded.

[0039] Furthermore, the first reinforcing steel wire 12 and the second reinforcing steel wire 21 are both made of high-strength carbon steel.

[0040] Example:

[0041] A process for preparing a hollow wall composite pipe with steel wire winding, the steps are as follows:

[0042] S1. Feed the resin raw material into the profile extruder 4 from the raw material feed port 41, and pass the first reinforcing steel wire 12 into the profile extruder 4 from the first reinforcing steel wire feed port 43, and extend it into the profile extruder head 42, and pass the second reinforcing steel wire 21 into the second glue coating device 8.

[0043] S2. When the profile extruder 4 extrude the hexagonal bottom tube 1, the first reinforcing steel wire 12 is simultaneously extruded into the inner wall thereof to form a plastic-steel composite tube, and the obtained hexagonal bottom tube 1 is wound on the winding roller 5.

[0044] S3, while the winding roller 5 is winding the hexagonal bottom tube 1, it is synchronously moved in the horizontal direction, and one side of the bottom tube is coated with glue by the first glue coating device 7, and the adjacent side surfaces 13 are bonded into one body through the limiting forming member 6 to form the side wall of the composite tube.

[0045] S4, the glue outlet of the second glue coating device 8 is aligned with the upper inclined surface 14 of the hexagonal bottom tube 1, and the glue is filled with glue as the winding roller 5 rotates. At the same time, the surface is flattened by the forming roller 9.

[0046] Furthermore, the limiting forming part 6 is rotationally connected to the winding roller 5, and mainly includes: a limiting upper support plate 61, a limiting spring 62 and a limiting lower support plate 63. The limiting upper support plate 61 and the limiting lower support plate 63 are connected by a plurality of limiting springs 62, and the plurality of limiting springs 62 are evenly distributed along the central axis of the limiting forming part 6.

[0047] Furthermore, a pressure sensor is installed on the upper limit plate 61 and is connected to the controller.

[0048] Further, in step S3, the first circle of the composite tube abuts against the limiting upper abutment plate 61. As the winding roller 5 moves in the horizontal direction, the multiple circles of hexagonal bottom tube 1 rolled on the winding roller 5 gradually squeeze the limiting upper abutment plate 61. When the pressure sensor reaches the set value, the controller controls the entire process to stop working, and the preparation of the composite tube is completed.

[0049] Furthermore, the profile extruder 4 , the second glue coating device 8 and the forming roller 9 are arranged in sequence along the moving direction of the winding roller 5 .

Claims

1. A process for preparing a hollow wall composite pipe with steel wire winding, the composite pipe comprising: A hexagonal bottom tube (1), a top adhesive layer (2) and a side adhesive layer (3); The composite pipe is formed by spirally winding the hexagonal bottom pipe (1) in a direction perpendicular to the axis thereof into a tubular structure. After winding, the side surfaces (13) of the adjacent hexagonal bottom pipes (1) are bonded together by hot melt adhesive and cooled to form the side bonding layer (3). The first reinforcing steel wire (12) is spirally wound along the axial direction of the hexagonal bottom pipe (1) and embedded in the side bonding layer (3). The upper inclined surfaces (14) of two adjacent hexagonal bottom tubes (1) are glued together by hot melt adhesive and cooled to form the top surface adhesive layer (2); the second reinforcing steel wire (21) is spirally wound along the axial direction of the hexagonal bottom tube (1) and embedded in the top surface adhesive layer (2); The interior of the hexagonal bottom tube (1) is hollow, and the cross-sectional shape of the cavity (11) thereof is consistent with the cross-sectional shape of the hexagonal bottom tube (1), and the two first reinforcing steel wires (12) are symmetrically embedded in the bottom of the cavity (11); The top surface adhesive layer (2) and the upper end surfaces of the two adjacent hexagonal bottom tubes (1) are located in the same horizontal plane, forming an inverted triangle structure, in which a plurality of the second reinforcing steel wires (21) are embedded; The first reinforcing steel wire (12) and the second reinforcing steel wire (21) are both made of high-strength carbon steel, and are characterized by the following steps: S1, feeding the resin raw material into the profile extruder (4) from the raw material feed port (41), and passing the first reinforcing steel wire (12) into the profile extruder (4) from the first reinforcing steel wire feed port (43), and extending it into the profile extruder head (42), and passing the second reinforcing steel wire (21) into the second glue coating device (8); S2, while the profile extruder (4) extrude the hexagonal bottom tube (1), the first reinforcing steel wire (12) is simultaneously extruded into the inner wall thereof to form a plastic-steel composite tube, and the obtained hexagonal bottom tube (1) is wound on a winding roller (5); S3, while the winding roller (5) is winding the hexagonal bottom tube (1), it is synchronously moved in the horizontal direction, and one side thereof is coated with glue by the first glue coating device (7), and the adjacent side surfaces (13) are bonded together into a whole through the limiting forming member (6) to form the side wall of the composite tube; S4, the glue outlet of the second glue coating device (8) is aligned with the upper inclined surface (14) of the hexagonal bottom tube (1), and the glue is filled with glue as the winding roller (5) rotates. At the same time, the surface is flattened by the forming roller (9).

2. The process for preparing a hollow wall composite pipe with steel wire winding according to claim 1, characterized in that: The limiting forming part (6) is rotatably connected to the winding roller (5), and mainly comprises: a limiting upper abutment plate (61), a limiting spring (62) and a limiting lower abutment plate (63); the limiting upper abutment plate (61) and the limiting lower abutment plate (63) are connected via a plurality of limiting springs (62); and the plurality of limiting springs (62) are evenly distributed along the central axis of the limiting forming part (6).

3. The process for preparing a hollow wall composite pipe with steel wire winding according to claim 2, characterized in that: A pressure sensor is installed on the upper limit plate (61) and is connected to a controller.

4. The process for preparing a hollow wall composite pipe with steel wire winding according to claim 2, characterized in that: In step S3, the first circle of the composite tube abuts against the limiting upper abutment plate (61), and as the winding roller (5) moves in the horizontal direction, the multiple circles of the hexagonal bottom tube (1) rolled on the winding roller (5) gradually squeeze the limiting upper abutment plate (61), and when the pressure sensor reaches the set value, the controller controls the entire process to stop working, thereby completing the preparation of the composite tube.

5. The process for preparing a hollow wall composite pipe with steel wire winding according to claim 1, characterized in that: The profile extruder (4), the second glue coating device (8) and the forming roller (9) are arranged in sequence along the moving direction of the winding roller (5).

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