A structural wall pipe and a manufacturing method thereof

Abstract

The present invention discloses a structural wall pipe and a manufacturing method thereof, comprising: a pipe body, and a winding pipe spirally wound on the outer wall of the pipe body, wherein the winding pipe comprises a plurality of fan-shaped frames sequentially spliced ​​into a circular ring structure, wherein the fan-shaped frame comprises an arc portion, a first meshing portion integrally connected to one side of the arc portion, and a second meshing portion integrally connected to the other side of the arc portion, wherein the first meshing portion and the second meshing portion are integrally connected at a side away from the arc portion, wherein the first meshing portion is provided with a first meshing strip, and the second meshing portion is provided with a second meshing strip matched with the first meshing strip; in two adjacent fan-shaped frames, the first meshing portion on one fan-shaped frame meshes with the second meshing portion on the other fan-shaped frame. Adjacent meshing portions mesh with each other through meshing strips, so that the winding pipe is not easily deformed when subjected to external force, and has good pressure resistance.

Description

Technical Field

[0001] The invention relates to a pipe, in particular to a structured wall pipe, belonging to the field of plastic reinforced pipes. Background Art

[0002] In the prior art, most of the winding pipes of structural wall pipes are wound with hollow polypropylene ribbed pipes, and some adopt the method of adding a reinforcing rib in the hollow winding pipe to increase the structural strength of the overall pipe. However, in the process of winding the winding pipe, the reinforcing ribs in the winding pipe with reinforcing ribs are easy to deform and displace, which damages the performance of the winding pipe, makes the strength between the structural wall pipes after winding low, and is prone to cracks or disintegration under strong pressure. In addition, the larger diameter structural wall pipe has a larger pressure-bearing area during geological changes, and is more likely to be squeezed, collapsed and deformed.

[0003] To this end, the applicant in this case applied to the State Intellectual Property Office for a large-diameter structural wall pipe on September 28, 2020, with application number CN202022176357.9 and authorization announcement number CN212297968U. The name is "A large-diameter structural wall pipe reinforced with internal rib combination", which includes a cylindrical internal rib structure formed by gluing a plurality of fan-shaped skeletons together, a combination portion is provided at one end of the fan-shaped skeleton close to the axis, and the contact position between the combination portions adopts an arc structure transition toward the axis and forms a quasi-circular cavity, and the end of the arc transition structure, i.e., the end away from the axis, is connected with a fitting portion, and a winding portion is provided at the end of the fitting portion away from the combination portion, and the winding portions are connected together through the fitting portion and combined into a quasi-circular structure, and the cylindrical internal rib structure is used to be wound around the outer circumference of the pipe body.

[0004] The use of this cylindrical inner rib structure can improve the overall sealing and strength of the structural wall pipe after winding is completed. However, the fan-shaped frames used in this structural wall pipe are bonded by adhesive and are easily deformed when subjected to external forces. Its compressive resistance needs to be further improved.

[0005] In view of this, the inventor of this case conducted in-depth research on the above-mentioned issues, which led to the emergence of this case. Summary of the invention

[0006] The object of the present invention is to provide a structural wall pipe which is not easy to deform and has good pressure resistance.

[0007] In order to achieve the above object, the present invention adopts such technical solution:

[0008] A structural wall pipe comprises: a pipe body, characterized in that it also comprises a winding pipe spirally wound on the outer side wall of the pipe body, the winding pipe comprises a plurality of fan-shaped skeletons spliced ​​into a circular ring structure in sequence, the fan-shaped skeleton comprises an arc portion, a first meshing portion integrally connected to one side of the arc portion and a second meshing portion integrally connected to the other side of the arc portion, the first meshing portion and the second meshing portion are integrally connected on a side away from the arc portion, a first meshing strip is provided on the first meshing portion, and a second meshing strip matching the first meshing strip is provided on the second meshing portion; after the fan-shaped skeleton is unfolded into a plane, the length direction of the first meshing strip is the same as the length direction of the first meshing portion, and the length direction of the second meshing strip is the same as the length direction of the second meshing portion, and in two adjacent fan-shaped skeletons, the first meshing portion on one of the fan-shaped skeletons meshes with the second meshing portion on the other fan-shaped skeleton.

[0009] Furthermore, the arc portion is provided with reinforcing ribs which are arranged perpendicular to the axis of the winding tube.

[0010] Furthermore, after the winding tube is unfolded into a straight line, a long groove is formed on the winding tube at a position between two adjacent fan-shaped frames.

[0011] Furthermore, after the winding tube is unfolded into a straight line, each of the fan-shaped frames in the winding tube is arranged in a spiral shape, and the arc portions of two adjacent fan-shaped frames fit each other.

[0012] Furthermore, in the same winding tube, a cross-shaped cavity is formed in the middle of the winding tube.

[0013] Furthermore, in the same fan-shaped skeleton, the arc portion, the first meshing portion and the second meshing portion are sequentially surrounded to form a cavity.

[0014] Furthermore, a polyethylene layer is wound around the outside of the tube body.

[0015] A method for manufacturing a structural wall pipe comprises the following steps:

[0016] S1: skeleton forming: a sector-shaped skeleton is extruded by a corrugated tube extruder having a sector-shaped die, wherein the sector-shaped skeleton comprises an arc portion, a first meshing portion integrally connected to one side of the arc portion, and a second meshing portion integrally connected to the other side of the arc portion, wherein the first meshing portion and the second meshing portion are integrally connected at a side away from the arc portion, the first meshing portion is provided with a first meshing strip, and the second meshing portion is provided with a second meshing strip matched with the first meshing strip;

[0017] S2: Frame splicing: splicing two or more fan-shaped frames in a circular shape in sequence, wherein the first meshing strip on one of the two adjacent fan-shaped frames meshes with the second meshing strip on the other fan-shaped frame to obtain a winding tube;

[0018] S3: Skeleton rotation: fix one end of the winding tube, and twist the other end of the winding tube with the axis of the winding tube as the axis, and the twisting angle of the winding tube is proportional to the length of the winding tube;

[0019] S4: shaping the winding tube: using a hot air gun to bake the rotated winding tube, the baking temperature range is 100-110° C., the baking time is 3-4 minutes, and then cooling and shaping is performed after baking;

[0020] S5: film coating after the winding tube is shaped: the winding tube after the shaping is connected to the film coating extruder, and the winding tube is coated with the coating film extruded by the film coating extruder;

[0021] S6: spirally wrap the coated winding tube on the outer wall of the tube body to form a structural wall tube.

[0022] Furthermore, the cooling and shaping method is natural cooling.

[0023] Furthermore, the ratio of the torsion angle of the winding tube to the length of the winding tube is 360°-450°:1.

[0024] By adopting the above-mentioned design scheme, the beneficial effect of the present invention is: a plurality of fan-shaped frames with first meshing strips and second meshing strips are combined into a winding tube, and adjacent meshing parts are meshed with each other through the meshing strips, so that the winding tube is not easily deformed when subjected to external force, and has better pressure resistance.

[0025] The fan-shaped frames in the winding tube are meshed with each other in a spiral shape, which on the one hand enhances the interaction between the fan-shaped frames so that they are not easy to disperse, and on the other hand reduces the deflection of the overall structure of the winding tube, that is, increases the rigidity of the overall structure of the winding tube.

[0026] By spirally winding the structural wall pipe of the present invention on the pipe body, the ability of the pipe body to resist external pressure and internal pressure is greatly improved, and the overall performance of the pipe body is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the winding tube provided by the present invention being wound around a tube body.

[0028] Figure 2 A schematic structural diagram of a cross section of a fan-shaped skeleton provided by the present invention.

[0029] Figure 3 This is a schematic structural diagram of the cross section of the winding tube provided by the present invention.

[0030] Figure 4 This is a schematic diagram of the three-dimensional structure of the fan-shaped skeleton provided by the present invention.

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of the winding tube provided by the present invention unfolded into a straight line.

[0032] Figure 6 This is a schematic diagram of a three-dimensional structure in which each fan-shaped skeleton is in a spiral shape after the winding tube provided by the present invention is unfolded into a straight line.

[0033] Figure 7 It is a schematic cross-sectional view of the winding tube after film coating provided by the present invention.

[0034] Figure 8 It is a structural schematic diagram of the fan-shaped mold provided by the present invention.

[0035] In the figure:

[0036] 1-tube body; 2-fan-shaped skeleton;

[0037] 21-arc portion; 22-first meshing portion;

[0038] 23- second meshing portion; 211- reinforcing rib;

[0039] 221- first meshing strip; 231 second meshing strip;

[0040] 3- winding tube; 4- fan-shaped mold;

[0041] 41-arc forming portion; 42-first meshing forming portion;

[0042] 43- second meshing forming portion; 5- long groove. DETAILED DESCRIPTION

[0043] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] like Figure 1 As shown, a structural wall pipe includes: a pipe body 1 and a fan-shaped frame 2. Four fan-shaped frames 2 are spliced ​​in a circular ring shape to form a winding pipe 3. The winding pipe 3 is spirally wound on the outer wall of the pipe body 1. The circular ring structure is the structure of the winding pipe 3.

[0045] like Figure 2 As shown, after the fan-shaped skeleton 2 is unfolded into a plane, the fan-shaped skeleton 2 includes an arc portion 21, and the two ends of the arc portion 21 are respectively connected with a first meshing portion 22 and a second meshing portion 23, the first meshing portion 22 and the second meshing portion 23 have the same length, and the first meshing portion 22 and the second meshing portion 23 are connected on a side away from the arc portion 21; the arc portion 21, the first meshing portion 22 and the second meshing portion 23 are integrally formed, and the connections between the arc portion 21, the first meshing portion 22 and the second meshing portion 23 are all chamfered, and a fan-shaped cavity is formed inside the fan-shaped skeleton 2, which has a stronger pressure resistance effect, and it is less likely for the structures to disintegrate when subjected to pressure.

[0046] like Figure 3 , Figure 4 and Figure 5 As shown, after the winding tube 3 is unfolded into a straight line, the side of the arc portion 21 away from the fan-shaped cavity has a reinforcing rib 211 arranged perpendicular to the axis of the winding tube 3 and with the same spacing, the side of the first meshing portion 22 away from the fan-shaped cavity is provided with a first meshing strip 221, and the side of the second meshing portion 23 away from the fan-shaped cavity is provided with a second meshing strip 231 matching the first meshing strip 221; the length direction of the first meshing strip 221 on the fan-shaped frame 2 is the same as the length direction of the first meshing portion 22, the length direction of the second meshing strip 231 is the same as the length direction of the second meshing portion 23, and the two adjacent meshing strips 221 and 231 are connected to each other. Among the fan-shaped skeletons 2, the first meshing strip 221 on the first meshing portion 22 on one of the fan-shaped skeletons 2 is meshed with the second meshing strip 231 on the second meshing portion 23 on another fan-shaped skeleton 2, and the four fan-shaped skeletons 2 are sequentially spliced ​​to form a winding tube 3 by meshing the first meshing portion 22 with the second meshing portion 23; the fan-shaped skeletons 2 are meshed with each other, and a cross-shaped cavity is formed in the middle of the winding tube 3. When the winding tube 3 is subjected to external pressure, the cross-shaped cavity has the function of buffering and reducing pressure; the multiple meshing portions support the entire winding tube 3. The first meshing strip 221 and the second meshing strip 231 between two adjacent fan-shaped frames 2 mesh with each other, so that when the winding tube 3 is subjected to external force, it is not easy for the fan-shaped frames to be misaligned. Since the first meshing strip 221 and the second meshing strip 231 in this embodiment do not cover the entire first meshing portion 22 and the second meshing portion 23, there is a long groove 5 between the arc portions 21 in the two adjacent fan-shaped frames 2, that is, the portion between the two adjacent fan-shaped frames 2 close to the outer side surface of the winding tube 3, and the length direction of the long groove 5 is the same as the length direction of the winding tube 3.

[0047] like Figure 6As shown, in order to better improve the overall compression resistance of the winding tube, after the winding tube 3 is unfolded into a straight line, the various fan-shaped skeletons 2 in the winding tube 3 are spirally meshed with each other, and the long groove 5 between the arc parts 21 in the two adjacent fan-shaped skeletons 2 is eliminated, that is, the parts of the two adjacent fan-shaped skeletons 2 close to the outer side of the winding tube 3 are fitted together. On the one hand, this enhances the interaction between the fan-shaped skeletons 2 so that it is not easy to disperse, and on the other hand, reduces the overall deflection of the winding tube 3, that is, increases the overall stiffness of the winding tube 3.

[0048] The method for manufacturing the structural wall pipe in the embodiment of the present invention comprises the following steps:

[0049] S1, skeleton forming: use Figure 8 The corrugated tube extruder of the sector-shaped die 4 shown in the figure extrudes Figure 4 The fan-shaped frame 2 shown includes an arc portion 21, a first meshing portion 22 integrally connected to one side of the arc portion 21, and a second meshing portion 23 integrally connected to the other side of the arc portion 21. The first meshing portion 22 and the second meshing portion 23 are integrally connected to a side away from the arc portion 21. The first meshing portion 22 is provided with a first meshing strip 221, and the second meshing portion 23 is provided with a second meshing strip 231 that matches the first meshing strip 221.

[0050] S2, skeleton splicing: splice the four extruded fan-shaped skeletons 2 in a circular shape in sequence, and the first meshing strip 221 on one of the two adjacent fan-shaped skeletons 2 is meshed with the second meshing strip 231 on the other fan-shaped skeleton 2 to obtain the following after splicing: Figure 5 The winding tube 3 shown;

[0051] S3, winding tube rotation: fix one end of the winding tube, twist the other end of the winding tube with the axis of the winding tube as the axis, the ratio of the twisting angle of the winding tube to the length of the winding tube is 360°-450°:1, and obtain the following Figure 6 The wound tube 3 after rotation is shown;

[0052] S4, shaping after rotation: using a hot air gun to bake the rotated winding tube 3, the baking temperature range is 100-110°C, the baking time is 3-4 minutes, and then naturally cooled and shaped after baking, to obtain the rotated winding tube 3 after shaping;

[0053] S5, film coating after shaping: the shaped winding tube 3 is connected to a film coating extruder (not shown in the figure), and the winding tube 3 is coated with a coating film extruded by the film coating extruder. The cross section of the wrapped winding tube 3 is as follows: Figure 7 shown.

[0054] S6, spirally wrap the coated winding tube 3 on the outer wall of the tube body 1 to form a Figure 1 Structural wall tubing shown.

[0055] The film coating extruder is a conventional circular film coating extruder available on the market, and will not be described in detail herein.

[0056] After the winding tube 3 is coated with a film, it is spirally wound on the outer wall of the tube body 1. The pitch can be adjusted according to different ring stiffness requirements, which is not limited here. According to different ring stiffness requirements, a polyethylene layer can be wound on the tube body 1 that has been wrapped with the winding tube 3 to improve the strength and stiffness of the entire structural wall pipe.

[0057] It should be noted that the fan-shaped skeleton 2 of the present invention is made by a conventional corrugated pipe extruder using Figure 8 The fan-shaped mold 4 shown is formed by extrusion, and the corrugated tube extruder has an injection pipe (not shown in the figure) for injecting material into the mold. The fan-shaped mold 4 is divided into two parts, which are arranged in a ring shape on both sides of the corrugated tube extruder respectively. The two parts are pieced together to form a fan-shaped mold 4 with a fan-shaped mold cavity in the middle. The fan-shaped mold 4 has an arc forming part 41, a first meshing forming part 42 and a second meshing forming part 43; the extrusion steps of the fan-shaped mold are: adding the material into the injection pipe, and then injecting the material into the fan-shaped mold 4 from the inlet of the corrugated tube extruder through the injection pipe, at this time, the corrugated tube extruder drives the mold to start working, and the fan-shaped molds 4 arranged on both sides of the corrugated tube extruder respectively start to reciprocate in a ring shape at the same time, and the fan-shaped mold 4 is closed from both sides to the middle and the formed fan-shaped mold 4 is sent out from the outlet of the corrugated tube extruder; the corrugated tube extrusion mechanism is a well-known technology in the field, and the specific details are not described in detail here.

[0058] In an embodiment of the present invention, the winding tube 3 is composed of four fan-shaped skeletons 2, and the extended line angle of the first meshing portion 22 between two adjacent fan-shaped skeletons 2 is ninety degrees. It can also be composed of three fan-shaped skeletons 2, and the extended line angle of the first meshing portion 22 between two adjacent fan-shaped skeletons 2 is one hundred and twenty degrees. It can also be composed of five fan-shaped skeletons 2, and the extended line angle of the first meshing portion 22 between two adjacent fan-shaped skeletons 2 is seventy-two degrees. When using different numbers of combinations, the fan-shaped mold 4 should be adjusted to the corresponding mold shape as needed; the fan-shaped skeleton 2 can adopt different numbers of combinations, as long as the same combination method can be used to achieve the effect of improving the pressure resistance of the structural wall pipe.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A structural wall pipe, comprising: The tube body is characterized in that it also includes a winding tube spirally wound on the outer side wall of the tube body, the winding tube includes a plurality of fan-shaped skeletons sequentially spliced ​​into a circular ring structure, the fan-shaped skeleton includes an arc portion, a first meshing portion integrally connected to one side of the arc portion, and a second meshing portion integrally connected to the other side of the arc portion, the first meshing portion and the second meshing portion are integrally connected on a side away from the arc portion, a first meshing strip is provided on the first meshing portion, and a second meshing strip matching the first meshing strip is provided on the second meshing portion; after the fan-shaped skeleton is unfolded into a plane, the length direction of the first meshing strip is the same as the length direction of the first meshing strip, and the length direction of the second meshing strip is the same as the length direction of the second meshing portion, and in two adjacent fan-shaped skeletons, the first meshing portion on one of the fan-shaped skeletons meshes with the second meshing portion on the other fan-shaped skeleton; After the winding tube is unfolded into a straight line, a long groove is formed on the winding tube at a position between two adjacent fan-shaped frames; Each of the fan-shaped frames in the winding tube is arranged in a spiral shape, the arc portions in two adjacent fan-shaped frames fit each other, and the long grooves in two adjacent fan-shaped frames are eliminated; In the same winding tube, a cross-shaped cavity is formed in the middle of the winding tube.

2. A structural wall pipe according to claim 1, characterized in that: The arc portion is also provided with reinforcing ribs which are arranged perpendicularly to the axis of the winding tube.

3. A structural wall pipe according to claim 1, characterized in that: In the same fan-shaped frame, the arc portion, the first meshing portion and the second meshing portion are sequentially surrounded to form a cavity.

4. A structural wall pipe according to claim 1, characterized in that: A polyethylene layer is wound around the outside of the tube body.

5. The method for manufacturing a structural wall pipe according to claim 1, comprising the following steps: S1: skeleton forming: a sector-shaped skeleton is extruded by a corrugated tube extruder having a sector-shaped die, wherein the sector-shaped skeleton comprises an arc portion, a first meshing portion integrally connected to one side of the arc portion, and a second meshing portion integrally connected to the other side of the arc portion, wherein the first meshing portion and the second meshing portion are integrally connected at a side away from the arc portion, the first meshing portion is provided with a first meshing strip, and the second meshing portion is provided with a second meshing strip matched with the first meshing strip; S2: Frame splicing: splicing two or more fan-shaped frames in a circular shape in sequence, wherein the first meshing strip on one of the two adjacent fan-shaped frames meshes with the second meshing strip on the other fan-shaped frame to obtain a winding tube; S3: Skeleton rotation: fix one end of the winding tube, and twist the other end of the winding tube with the axis of the winding tube as the axis, and the twisting angle of the winding tube is proportional to the length of the winding tube; S4: shaping the winding tube: using a hot air gun to bake the rotated winding tube, the baking temperature range is 100-110° C., the baking time is 3-4 minutes, and then cooling and shaping is performed after baking; S5: film coating after the winding tube is shaped: the winding tube after the shaping is connected to the film coating extruder, and the winding tube is coated with the coating film extruded by the film coating extruder; S6: spirally wrap the coated winding tube on the outer wall of the tube body to form a structural wall tube.

6. The method for manufacturing a structural wall pipe according to claim 5, characterized in that: The cooling and shaping method is natural cooling.

7. The method for manufacturing a structural wall pipe according to claim 5, characterized in that: The ratio of the torsion angle of the winding tube to the length of the winding tube is 360°-450°:1.

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