Hole mesh steel belt winding reinforced composite pipe and production system thereof

Abstract

The utility model relates to the technical field of composite pipe production, and discloses a hole net steel belt winding reinforced composite pipe and a production system thereof. The reinforced composite pipe comprises a plastic core pipe, a first hole net steel belt and a second hole net steel belt, wherein the first hole net steel belt is wound on the radial outer side of the plastic core pipe in the first spiral direction and is provided with a plurality of first through holes; the second hole net steel belt is wound on the radial outer side of the first hole net steel belt in the second spiral direction opposite to the first spiral direction and is provided with a plurality of second through holes; and the plastic protection layer is arranged on the radial outer side of the second hole net steel belt. The second through hole and the first through hole are at least partially overlapped, the overlapped part forms a third through hole, and the third through hole can be filled with a connecting material. According to the technical scheme, the difficulty and complexity of the production process can be reduced; and meanwhile, the overall structural stability and rigidity of the reinforced composite pipe can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite pipe production, and particularly relates to a perforated mesh steel strip wound and reinforced composite pipe. On this basis, it also particularly relates to a production system for a perforated mesh steel strip wound and reinforced composite pipe. Background Art

[0002] Thermoplastic composite pipes are pipes made mainly of thermoplastics through an extrusion production process, generally including an inner layer pipe for conveying a medium and an outer protective pipe. In order to improve the stiffness of the composite pipe, a perforated mesh steel strip is generally arranged between the inner layer pipe and the outer protective pipe at present to form a reinforcing skeleton, thereby improving the stiffness of the composite pipe. The production process of the composite pipe with a perforated mesh steel strip generally includes: uncoiling the perforated mesh steel strip - trimming the edges of the perforated mesh steel strip - forming the perforated mesh steel strip - welding into a pipe - heating - simultaneously compounding inside and outside plastic molds - shaping and cooling - traction - cutting. That is, for the existing perforated mesh steel strip composite pipes, the perforated mesh steel strip is usually formed and welded first (straight seam welding is used for φ50 - φ200mm, and spiral welding is used for φ250 - φ630mm) into a tubular skeleton, and then the inner plastic and the outer plastic are simultaneously extruded through a composite die and compounded and formed inside the die.

[0003] However, since the perforated mesh steel strip is formed by welding, the requirements for welding quality are high, the welding operation is difficult, and the inner and outer layers of the composite pipe are formed inside the die through the composite die, which further increases the difficulty and complexity of the manufacturing process. At the same time, since the perforated mesh steel strip is welded into a tube, the manufactured composite pipe cannot be coiled, which is not conducive to the storage and transportation of the composite pipe. In addition, although in the process of simultaneously extruding the inner plastic and the outer plastic and compounding and forming inside the die for the composite pipe, part of the inner plastic and the outer plastic will be combined together through the holes in the perforated mesh steel strip, so that the inner plastic, the perforated mesh steel strip, and the outer plastic are combined together. However, the non-hole parts of the perforated mesh steel strip are actually prone to be in a delaminated state with the inner plastic and the outer plastic respectively, resulting in a low bonding strength between the inner plastic, the perforated mesh steel strip, and the outer plastic, and thus the overall structural stability of the composite pipe is poor and the stiffness is low. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the technical problems existing in the prior art, such as poor structural stability of the perforated mesh steel strip composite pipe and complex production process, and to provide a perforated mesh steel strip wound and reinforced composite pipe and its production system. The perforated mesh steel strip wound and reinforced composite pipe has the advantages of good structural stability, simple production process, and convenient storage and transportation.

[0005] To achieve the above object, a first aspect of the present utility model provides a hole mesh steel strip wound reinforced composite pipe, comprising: a plastic core pipe; a first hole mesh steel strip, which is wound around the outer diameter of the plastic core pipe along a first spiral direction and the first hole mesh steel strip has a plurality of first through holes; a second hole mesh steel strip, which is wound around the outer diameter of the first hole mesh steel strip along a second spiral direction opposite to the first spiral direction and the second hole mesh steel strip has a plurality of second through holes, at least part of the second through holes overlap with the first through holes, and the overlapping part forms a third through hole, and a connecting material is filled in the third through hole; and a plastic protective layer, which is arranged on the outer diameter of the second hole mesh steel strip.

[0006] Through the above technical solution, the first hole mesh steel strip is wound around the outer diameter of the plastic core pipe along the first spiral direction, and the second hole mesh steel strip is wound around the outer diameter of the first hole mesh steel strip. Since the hole mesh steel strip does not need to be formed by welding, on the one hand, the difficulty and complexity of the production process are reduced; on the other hand, the produced reinforced composite pipe is convenient for coiling, which is beneficial to the storage and transportation of the reinforced composite pipe. Moreover, the reinforced composite pipe of the present utility model includes a plastic core pipe and a plastic protective layer. During the production process, there is no need to form an inner layer pipe and an outer layer pipe by composite in a mold at the same time, further reducing the production difficulty of the reinforced composite pipe. In addition, at least part of the second through holes of the second hole mesh steel strip overlap with the first through holes of the first hole mesh steel strip, and the overlapping part forms a third through hole, and a connecting material, such as plastic or glue, can be filled in the third through hole, so that the connecting material forms a "rivet" structure between the plastic core pipe and the plastic protective layer through the third through hole, thereby improving the overall structural stability and stiffness of the reinforced composite pipe.

[0007] In some embodiments, the hole mesh steel strip wound reinforced composite pipe provided by the present utility model further includes a first glue layer compounded on the outer peripheral surface of the plastic core pipe, and the first hole mesh steel strip is wound around the outer peripheral surface of the first glue layer along the first spiral direction.

[0008] In some embodiments, the hole mesh steel strip wound reinforced composite pipe provided by the present utility model further includes a second glue layer compounded on the outer diameter of the second hole mesh steel strip, and the plastic protective layer is compounded on the outer peripheral surface of the second glue layer.

[0009] In some embodiments, along the width direction of the first hole mesh steel strip, the centroid connection line of the first through holes corresponding to two adjacent first through holes forms a first punching angle with the width direction of the first hole mesh steel strip; along the width direction of the second hole mesh steel strip, the centroid connection line of the second through holes corresponding to two adjacent second through holes forms a second punching angle with the width direction of the second hole mesh steel strip, and the first punching angle is equal to the second punching angle.

[0010] In some embodiments, the center line of the enhanced composite pipe forms a first spiral winding angle with the first spiral direction and a second spiral winding angle with the second spiral direction. The first spiral winding angle is equal to the second spiral winding angle, and the calculation relationship among the first spiral winding angle, the second spiral winding angle, the first punching angle, and the second punching angle satisfies the following formula:

[0011] 2α - 100° ≤ β ≤ 2α - 80°;

[0012] where α is the first spiral winding angle and the second spiral winding angle;

[0013] β is the first punching angle and the second punching angle.

[0014] In some embodiments, the calculation relationship among the first spiral winding angle, the second spiral winding angle, the first punching angle, and the second punching angle satisfies the following formula:

[0015] β = 2α - 90°.

[0016] In some embodiments, the first through hole and the second through hole have the same shape.

[0017] In some embodiments, both the first through hole and the second through hole are circular holes, and the diameter of the second through hole is not less than that of the first through hole.

[0018] In some embodiments, the first through hole is one of a strip hole, a polygonal hole, an elliptical hole, or a continuous double circular hole; the second through hole is one of a strip hole, a polygonal hole, an elliptical hole, or a continuous double circular hole.

[0019] In some embodiments, the first perforated steel strip is wound around the radial outer side of the plastic core pipe along the first spiral direction, and a first gap is formed between adjacent spirals.

[0020] In some embodiments, the second perforated steel strip is wound around the radial outer side of the first perforated steel strip along the second spiral direction, and a second gap is formed between adjacent spirals.

[0021] In some embodiments, the inner and outer surfaces of the first perforated steel strip and the inner and outer surfaces of the second perforated steel strip are both coated with glue.

[0022] The second aspect of the present utility model provides a production system for a hole mesh steel strip wound reinforced composite pipe. This production system is used to produce the aforementioned hole mesh steel strip wound reinforced composite pipe, and includes: a core pipe extruder for extruding the plastic core pipe; a first winding machine for winding the first hole mesh steel strip on the radial outer side of the plastic core pipe along the first spiral direction; a second winding machine for winding the second hole mesh steel strip on the radial outer side of the first hole mesh steel strip along the second spiral direction and enabling at least a part of the second through holes to overlap with the first through holes, and the overlapping part forms the third through holes; and a plastic protective layer extruder for extruding the plastic protective layer.

[0023] In some embodiments, the production system for the hole mesh steel strip wound reinforced composite pipe provided by the present utility model further includes a first adhesive layer composite die for composite bonding a first adhesive layer on the outer peripheral surface of the plastic core pipe, and the first hole mesh steel strip is wound on the outer peripheral surface of the first adhesive layer.

[0024] In some embodiments, the production system for the hole mesh steel strip wound reinforced composite pipe provided by the present utility model further includes a second adhesive layer composite die for composite bonding a second adhesive layer on the radial outer side of the second hole mesh steel strip, and the plastic protective layer is composite bonded on the outer peripheral surface of the second adhesive layer. Description of the Drawings

[0025] Figure 1 is a schematic structural view of the hole mesh steel strip wound reinforced composite pipe provided by the present utility model;

[0026] Figure 2 is Figure 1 the front view of the hole mesh steel strip wound reinforced composite pipe of

[0027] Figure 3 is Figure 2 the sectional view taken along the A - A direction in

[0028] Figure 4 is a schematic view of an embodiment of the hole mesh steel strip with round holes provided by the present utility model;

[0029] Figure 5 is a schematic view of a winding method of the hole mesh steel strip with round holes of the same diameter provided by the present utility model;

[0030] Figure 6 is a schematic view of a winding method of the hole mesh steel strip with round holes of different diameters provided by the present utility model;

[0031] Figure 7 is a schematic view of an embodiment of the hole mesh steel strip with strip holes provided by the present utility model;

[0032] Figure 8 It is a schematic diagram of a winding method of the hole mesh steel strip with strip-shaped holes provided by the present utility model.

[0033] Explanation of the reference numerals

[0034] 1 - Plastic core tube; 2 - First hole mesh steel strip; 21 - First through hole; 3 - Second hole mesh steel strip; 31 - Second through hole; 32 - Connecting line of the centroids of the through holes; 4 - Plastic protective layer; 5 - Second adhesive layer; 6 - First adhesive layer; 7 - Third through hole; 8 - Center line; 9 - Production direction. Specific embodiments

[0035] The following will describe the specific embodiments of the present utility model in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present utility model, and are not used to limit the present utility model.

[0036] In the present utility model, unless otherwise stated, the orientation or positional relationship indicated by terms such as "upper, lower, left, right, inner, outer, top, bottom" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0037] In addition, terms such as "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present utility model, the description referring to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0039] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or in communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The first aspect of the present utility model provides a hole mesh steel strip wound reinforced composite pipe. Referring to Figures 1 - 8 As shown, the reinforced composite pipe includes: a plastic core pipe 1, a first hole mesh steel strip 2, a second hole mesh steel strip 3, and a plastic protective layer 4, which are sequentially arranged from the inside to the outside. Among them, the first hole mesh steel strip 2 is wound around the radial outer side of the plastic core pipe 1 along a first spiral direction, and the first hole mesh steel strip 2 has a plurality of first through holes 21. The second hole mesh steel strip 3 is wound around the radial outer side of the first hole mesh steel strip 2 along a second spiral direction opposite to the first spiral direction, and the second hole mesh steel strip 3 has a plurality of second through holes 31. At least part of the second through holes 31 overlaps with the first through holes 21, and the overlapping part forms a third through hole 7. A connecting material is filled in the third through hole 7; the plastic protective layer 4 is arranged on the radial outer side of the second hole mesh steel strip 3.

[0041] For the hole mesh steel strip wound reinforced composite pipe provided by the present utility model, the first hole mesh steel strip 2 is wound around the radial outer side of the plastic core pipe 1 along the first spiral direction, and the second hole mesh steel strip 3 is wound around the radial outer side of the first hole mesh steel strip along the second spiral direction. Since neither the first hole mesh steel strip 2 nor the second hole mesh steel strip 3 needs to be formed by welding, on the one hand, the difficulty and complexity of the production process are reduced; on the other hand, the produced reinforced composite pipe is convenient for coiling, which is beneficial to the storage and transportation of the reinforced composite pipe. Moreover, the reinforced composite pipe of the present utility model includes a plastic core pipe 1 and a plastic protective layer 4. During the production process, the plastic core pipe 1 and the plastic protective layer 4 are respectively extruded successively, and there is no need to form an inner layer pipe and an outer layer pipe by simultaneous compounding in a mold, further reducing the production difficulty of the reinforced composite pipe. In addition, a connecting material, such as plastic or glue, can be filled in the third through hole 7. The connecting material forms a "rivet" structure between the plastic core pipe 1 and the plastic protective layer 4 through the third through hole 7, thereby improving the overall structural stability and stiffness of the reinforced composite pipe.

[0042] In some embodiments, when the pipe with the third through hole 7 formed by winding the first hole mesh steel strip 2 and the second hole mesh steel strip 3 passes through the plastic protective layer mold, at least part of the melted plastic in the mold can pass through and fill the third through hole 7. After cooling and forming, it is connected to the plastic core pipe 1 together, thereby forming the aforementioned "rivet" structure and improving the overall structural stability and stiffness of the reinforced composite pipe.

[0043] Or according to an embodiment of the hole mesh steel strip wound reinforced composite pipe of the present utility model, with reference to Figures 1 - 3 As shown, the hole mesh steel strip wound reinforced composite pipe provided by the present utility model further includes a first adhesive layer 6 compounded on the outer peripheral surface of the plastic core pipe 1, and the first hole mesh steel strip 2 is wound around the outer peripheral surface of the first adhesive layer 6 along the first spiral direction. By heating the first hole mesh steel strip, at least part of the surface of the first adhesive layer 6 is melted through the heat conduction of the steel strip, so that the first adhesive layer 6 and the first hole mesh steel strip 2 are bonded. At the same time, at least part of the melted plastic of the aforementioned plastic protective layer 4 is connected to the adhesive through the third through hole 7. Compared with plastic, on the one hand, the adhesive has a lower melting point, which is convenient for heating and melting, and has good fluidity; on the other hand, the adhesive has good bonding properties with plastic and the hole mesh steel strip, which can improve the connection strength. In this way, on the one hand, the plastic core pipe 1 is bonded to the first hole mesh steel strip 2 through the first adhesive layer 6, enhancing the connection strength between the plastic core pipe 1 and the first hole mesh steel strip 2; on the other hand, the plastic protective layer 4 and the first adhesive layer 6 are connected together through the third through hole 7, which is beneficial to improving the overall structural stability and stiffness of the reinforced composite pipe and preventing delamination of the reinforced composite pipe.

[0044] In some embodiments, with reference to Figures 1 - 3 As shown, the hole mesh steel strip wound reinforced composite pipe provided by the present utility model further includes a second adhesive layer 5 compounded on the radial outer side of the second hole mesh steel strip 3, and the plastic protective layer 4 is compounded on the outer peripheral surface of the second adhesive layer 5. In this way, on the one hand, the plastic protective layer 4 is bonded to the second hole mesh steel strip 3 through the second adhesive layer 5, enhancing the connection strength between the plastic protective layer 4 and the second hole mesh steel strip 3; on the other hand, the second adhesive layer 5 and the first adhesive layer 6 are fused together through the third through hole 7, which is beneficial to improving the overall structural stability and stiffness of the reinforced composite pipe and preventing delamination of the reinforced composite pipe.

[0045] In some embodiments, with reference to Figures 4 - 8 As shown, along the width direction of the first hole mesh steel strip 2, the centroid connection line of the first through holes 21 corresponding to two adjacent first through holes forms a first punching angle with the width direction of the first hole mesh steel strip 2; along the width direction of the second hole mesh steel strip 3, the centroid connection line 32 of the second through holes 31 corresponding to two adjacent second through holes forms a second punching angle with the width direction of the second hole mesh steel strip 3, and the first punching angle is equal to the second punching angle. In this way, when winding the first hole mesh steel strip 2 and the second hole mesh steel strip 3, it is beneficial to increase the area of the overlapping part of the second through holes 31 and the first through holes 21, that is, to increase the area of the third through hole 7, and further allow more of the second adhesive layer 5 to pass through the third through hole 7, further improving the overall structural stability and stiffness of the reinforced composite pipe.

[0046] In some embodiments, with reference to Figure 5 、 Figure 6 And Figure 8As shown, the center line 8 of the reinforced composite pipe forms a first helical winding angle with the first helical direction and a second helical winding angle with the second helical direction, and the first helical winding angle is equal to the second helical winding angle. Combining Figure 5 , Figure 6 and Figure 8 shown, the first helical direction is the length direction of the first perforated mesh steel strip 2 in the figure, the second helical direction is the length direction of the second perforated mesh steel strip 3 in the figure, and the calculation relationships among the first helical winding angle, the second helical winding angle, the first punching angle and the second punching angle satisfy the following formula:

[0047] 2α - 100° ≤ β ≤ 2α - 80°;

[0048] where α is the first helical winding angle and the second helical winding angle;

[0049] β is the first punching angle and the second punching angle.

[0050] In some embodiments, in order to further increase the area of the third through hole 7, thereby enhancing the overall structural stability and stiffness of the reinforced composite pipe, the calculation relationships among the first helical winding angle, the second helical winding angle, the first punching angle and the second punching angle satisfy the following formula:

[0051] 2α - 95° ≤ β ≤ 2α - 85°.

[0052] In some embodiments, in order to further increase the area of the third through hole 7, thereby enhancing the overall structural stability and stiffness of the reinforced composite pipe, the calculation relationships among the first helical winding angle, the second helical winding angle, the first punching angle and the second punching angle satisfy the following formula:

[0053] β = 2α - 90°.

[0054] It should be noted that, combining Figure 4 with Figure 5 and Figure 6 shown, or combining Figure 7 with Figure 8 shown, multiple second through holes 31 are arranged in a matrix on the second perforated mesh steel strip 3, and the centroids of the second through holes 31 in any corresponding column are connected to form a second through hole centroid connection line 32, and the angle formed by the second through hole centroid connection line 32 and the width direction of the second perforated mesh steel strip 3 is the second punching angle. Multiple first through holes 21 are arranged in a matrix on the first perforated mesh steel strip 2, and the centroids of the first through holes 21 in any corresponding column are connected to form a first through hole centroid connection line, and the angle formed by the first through hole centroid connection line and the width direction of the first perforated mesh steel strip 2 is the first punching angle. Referring to Figures 4 - 8As shown, when the first helical winding angle is equal to the second helical winding angle and both are α, and the first punching angle is equal to the second punching angle and both are β, and β and α satisfy: β = 2α - 90°, the centroid connection line 32 of the second through - holes is parallel to the length direction of the first perforated steel strip 2, and the centroid connection line of the first through - holes is parallel to the length direction of the second perforated steel strip 3.

[0055] In some embodiments, the size of the second through - holes 31 is not less than the size of the first through - holes 21. In this way, it can ensure that the third through - holes 7 have a larger area, thereby enhancing the overall structural stability and stiffness of the reinforced composite pipe. In addition, the specific sizes of the second through - holes 31 and the first through - holes 21 are adjusted according to the pipe diameter of the actually produced reinforced composite pipe and the widths of the corresponding second perforated steel strip 3 and the first perforated steel strip 2.

[0056] In some embodiments, the shapes of the first through - holes 21 and the second through - holes 31 can be the same. For example, referring to Figure 5 、 Figure 6 and Figure 8 as shown, both the first through - holes 21 and the second through - holes 31 are circular holes or strip - shaped holes. Of course, the shapes of the first through - holes 21 and the second through - holes 31 can also be different. For example, the first through - holes 21 are circular holes and the second through - holes 31 are strip - shaped holes.

[0057] In some embodiments, referring to Figures 4 - 6 as shown, both the first through - holes 21 and the second through - holes 31 are circular holes. The diameter of the second through - holes 31 is not less than the diameter of the first through - holes 21, and the diameter of the first through - holes 21 is equal to the diameter of the third through - holes 7. For example, referring to Figure 5 as shown, the diameter of the first through - holes 21 is equal to the diameter of the second through - holes 31, and the diameter of the third through - holes 7 is equal to the diameter of the first through - holes 21 and the diameter of the second through - holes 31. Or referring to Figure 6 as shown, the diameter of the second through - holes 31 is greater than the diameter of the first through - holes 21. At this time, the second through - holes 31 can completely cover the first through - holes 21, and the diameter of the third through - holes 7 is equal to the diameter of the first through - holes 21. Moreover, setting the diameter of the second through - holes 31 to be not less than the diameter of the first through - holes 21 enables the second through - holes 31 to completely cover the first through - holes 21, which can prevent air entrapment between the first perforated steel strip 2 and the second perforated steel strip 3, thereby affecting the product quality of the perforated steel strip wound reinforced composite pipe provided by the present utility model.

[0058] Of course, as described above, the shapes of the first through - holes 21 and the second through - holes 31 can be set arbitrarily as long as it is ensured that at least partial overlap can be formed between the second through - holes 31 and the first through - holes 21. In some embodiments, the first through - holes 21 are one of strip - shaped holes, polygonal holes, elliptical holes or continuous double - circular holes, and the second through - holes 31 are one of strip - shaped holes, polygonal holes, elliptical holes or continuous double - circular holes. Among them, the continuous double - circular holes refer to a combined figure formed by two circular holes in an intersecting or externally tangent manner.

[0059] In some embodiments, with reference to Figure 3 as shown, the first perforated steel strip 2 is wound around the outer radial side of the plastic core tube 1 along the first helical direction and a first gap is formed between adjacent helices, which is beneficial to enhancing the coiling of the composite pipe, thus facilitating the storage and transportation of the enhanced composite pipe.

[0060] In some embodiments, with reference to Figure 3 as shown, the second perforated steel strip 3 is wound around the outer radial side of the first perforated steel strip 2 along the second helical direction and a second gap is formed between adjacent helices. Since the first perforated steel strip 2 and the second perforated steel strip 3 are wound in opposite directions, at least part of the second gap is overlapped with the first gap. In this way, on the one hand, it is beneficial to enhancing the coiling of the composite pipe; on the other hand, the overlapping part of the second gap and the first gap is equivalent to increasing the area of the third through hole 7, further improving the overall structural stability and stiffness of the enhanced composite pipe.

[0061] In some embodiments, along the axial direction of the enhanced composite pipe, the width of the second gap is equal to the width of the first gap, which is beneficial to reducing the punching and winding process difficulties for realizing the second through hole 31 to cover the first through hole 21.

[0062] In some embodiments, the inner and outer surfaces of the first perforated steel strip 2 and the inner and outer surfaces of the second perforated steel strip 3 are both coated with glue, so as to enhance the connection strength between the plastic core tube 1, the first perforated steel strip 2, the second perforated steel strip 3 and the plastic protective layer 4, and further improve the overall structural stability and stiffness of the enhanced composite pipe.

[0063] The second aspect of the present utility model provides a production system for a perforated steel strip wound enhanced composite pipe. The production system is used for producing the aforementioned perforated steel strip wound enhanced composite pipe. The production system includes: a core tube extruder for extruding the plastic core tube 1; a first winding machine for winding the first perforated steel strip 2 around the outer radial side of the plastic core tube 1 along the first helical direction; a second winding machine for winding the second perforated steel strip 3 around the outer radial side of the first perforated steel strip 2 along the second helical direction and making at least part of the second through hole 31 overlap with the first through hole 21, and the overlapping part forms the third through hole 7; and a plastic protective layer extruder for extruding the plastic protective layer 4.

[0064] In some embodiments, the production system for the perforated steel strip wound enhanced composite pipe provided by the present utility model further includes a first glue layer composite die for composite a first glue layer 6 on the outer peripheral surface of the plastic core tube 1, and the first perforated steel strip 2 is wound on the outer peripheral surface of the first glue layer 6.

[0065] In some embodiments, the production system of the mesh steel strip wrapped reinforced composite pipe provided by the utility model also includes a second rubber layer composite mold, which is used to composite the second rubber layer 5 on the radial outside of the second mesh steel strip 3, and the plastic protective layer 4 is composited on the outer peripheral surface of the second rubber layer 5.

[0066] The following is a detailed description of the production process of the mesh steel strip wound reinforced composite pipe provided by the utility model.

[0067] The core tube plastic is extruded by a core tube extruder, and the core tube plastic is formed into a plastic core tube 1 through a core tube mold, and the plastic core tube 1 is sized and cooled. The formed plastic core tube 1 is pulled along the production direction 9 by a traction machine. The glue is compounded on the outer peripheral surface of the plastic core tube 1 through a first glue layer compound mold to form a first glue layer 6, and the first glue layer 6 is cooled. The first mesh steel belt 2 is released and the contact portion of the first mesh steel belt 2 and the first glue layer 6 is heated, and the first glue layer 6 is preheated at the same time. The inner and outer surfaces of the first mesh steel belt 2 are pre-coated with glue, and the first mesh steel belt 2 is wound on the outer peripheral surface of the first glue layer 6 along the first spiral direction. Release the second mesh steel belt 3 and heat the contact portion between the second mesh steel belt 3 and the first mesh steel belt 2. Meanwhile, heat the first mesh steel belt 2 wrapped around the outer circumference of the first adhesive layer 6. The inner and outer surfaces of the second mesh steel belt 3 are pre-coated with adhesive. Wrap the second mesh steel belt 3 around the radial outer side of the first mesh steel belt 2 along a second spiral direction, and the second spiral direction is opposite to the first spiral direction. Use a second adhesive layer composite mold to compound the adhesive on the radial outer side of the second mesh steel belt 3 to form a second adhesive layer 5, and cool the second adhesive layer 5. Use a plastic protective layer extruder to extrude the protective tube plastic, and compound it on the outer circumference of the second adhesive layer 5 to form a plastic protective layer 4. At this point, the mesh steel belt wrapped reinforced composite tube provided by the utility model is formed and cooled. Use a traction machine to pull the reinforced composite tube along the production direction, and cut and stack it according to actual production and use requirements.

[0068] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A hole mesh steel strip wound reinforced composite pipe, characterized in that, Comprising: A plastic core tube (1); A first perforated steel strip (2), which is wound around the outer radial side of the plastic core tube (1) along a first spiral direction and the first perforated steel strip (2) has a plurality of first through holes (21); A second perforated steel strip (3), which is wound around the outer radial side of the first perforated steel strip (2) along a second spiral direction opposite to the first spiral direction and the second perforated steel strip (3) has a plurality of second through holes (31), and the second through holes (31) at least partially overlap with the first through holes (21), and an overlapping part thereof forms a third through hole (7), and a connecting material is filled in the third through hole (7); and, A plastic protective layer (4), which is arranged on the outer radial side of the second perforated steel strip (3).

2. The perforated steel strip wound reinforced composite pipe according to claim 1, characterized in that, It further includes a first adhesive layer (6) compounded on the outer peripheral surface of the plastic core tube (1), and the first perforated steel strip (2) is wound around the outer peripheral surface of the first adhesive layer (6) along the first spiral direction.

3. The hole mesh steel strip wound reinforced composite pipe according to claim 1, characterized in that, It further includes a second adhesive layer (5) compounded on the outer radial side of the second perforated steel strip (3), and the plastic protective layer (4) is compounded on the outer peripheral surface of the second adhesive layer (5).

4. The hole mesh steel strip wound reinforced composite pipe according to claim 1, characterized in that, Along the width direction of the first perforated steel strip (2), a connecting line of the centroids of the first through holes corresponding to two adjacent first through holes (21) forms a first punching angle with the width direction of the first perforated steel strip (2); Along the width direction of the second perforated steel strip (3), a connecting line (32) of the centroids of the second through holes corresponding to two adjacent second through holes (31) forms a second punching angle with the width direction of the second perforated steel strip (3), and the first punching angle is equal to the second punching angle.

5. The perforated mesh steel strip wound reinforced composite pipe according to claim 4, wherein The center line (8) of the reinforced composite pipe forms a first spiral winding angle with the first spiral direction, and the center line (8) forms a second spiral winding angle with the second spiral direction, and the first spiral winding angle is equal to the second spiral winding angle, and the calculation relationship among the first spiral winding angle, the second spiral winding angle, the first punching angle and the second punching angle satisfies the following formula: 2α-100°≤β≤2α-80°； Wherein, α is the first spiral winding angle and the second spiral winding angle; β is the first punching angle and the second punching angle.

6. The hole network steel strip winding reinforced composite pipe according to claim 5, characterized in that, The calculation relationship among the first spiral winding angle, the second spiral winding angle, the first punching angle and the second punching angle satisfies the following formula: β＝2α-90°。 7. The hole mesh steel strip wound reinforced composite pipe according to claim 1, characterized in that, The shapes of the first through hole (21) and the second through hole (31) are the same.

8. The perforated steel strip wound reinforced composite pipe according to claim 7, characterized in that, Both the first through hole (21) and the second through hole (31) are circular holes, and the diameter of the second through hole (31) is not less than the diameter of the first through hole (21).

9. The perforated mesh steel strip wound and reinforced composite pipe according to claim 1, wherein The first through hole (21) is one of a strip hole, a polygonal hole, an elliptical hole or a continuous double circular hole; The second through hole (31) is one of a strip hole, a polygonal hole, an elliptical hole or a continuous double circular hole.

10. The hole mesh steel strip wound reinforced composite pipe according to claim 1, characterized in that, The first perforated steel strip (2) is wound around the outer radial side of the plastic core tube (1) along the first spiral direction and a first gap is formed between adjacent spirals.

11. The hole network steel strip wound reinforced composite pipe according to claim 10, characterized in that, The second perforated steel strip (3) is wound around the radial outer side of the first perforated steel strip (2) along the second spiral direction, and a second gap is formed between adjacent spirals.

12. The hole mesh steel strip winding reinforced composite pipe according to any one of claims 1-11, characterized in that, The inner and outer surfaces of the first perforated steel strip (2) and the inner and outer surfaces of the second perforated steel strip (3) are coated with glue.

13. A production system for a hole network steel strip wound reinforced composite pipe, characterized in that, For producing a perforated steel strip wound reinforced composite pipe according to any one of claims 1-12, the production system includes: A core pipe extruder for extruding the plastic core pipe (1); A first winding machine for winding the first perforated steel strip (2) around the radial outer side of the plastic core pipe (1) along the first spiral direction; A second winding machine for winding the second perforated steel strip (3) around the radial outer side of the first perforated steel strip (2) along the second spiral direction and enabling at least a part of the second through holes (31) to overlap with the first through holes (21), and the overlapping part forms the third through hole (7); and A plastic protective layer extruder for extruding the plastic protective layer (4).

14. The production system of the hole mesh steel strip wound reinforced composite pipe according to claim 13, characterized in that, It further includes a first glue layer composite die for composite the first glue layer (6) on the outer peripheral surface of the plastic core pipe (1), and the first perforated steel strip (2) is wound on the outer peripheral surface of the first glue layer (6).

15. The production system of the hole mesh steel strip wound and reinforced composite pipe according to claim 13, characterized in that, It further includes a second glue layer composite die for composite the second glue layer (5) on the radial outer side of the second perforated steel strip (3), and the plastic protective layer (4) is composite on the outer peripheral surface of the second glue layer (5).

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