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

Abstract

The invention relates to the technical field of composite pipe production, and discloses a hole net steel belt winding reinforced composite pipe and a production system and a production process 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 present invention relates to the technical field of composite pipe production, and in particular to a composite pipe reinforced by winding a mesh steel strip, and in particular to a production system and a production process of a composite pipe reinforced by winding a mesh steel strip. Background Art

[0002] Thermoplastic composite pipes are pipes made of thermoplastic plastics as the main raw materials through an extrusion production process, generally including an inner layer pipe and an outer protective pipe for conveying the medium. In order to improve the rigidity of the composite pipe, a mesh steel belt is generally set between the inner layer pipe and the outer protective pipe to form a reinforced skeleton, thereby improving the rigidity of the composite pipe. The production process of composite pipes with mesh steel belts is generally: mesh steel belt unwinding-mesh steel belt trimming-mesh steel belt forming-welding into pipes-heating-simultaneous compounding of inner and outer plastic molds-setting cooling-pulling-cutting. That is, the existing mesh steel belt composite pipes are usually first formed and welded (φ50-φ200mm uses straight seam welding, φ250-φ630mm uses spiral welding) into a tubular skeleton, and the tubular skeleton is then passed through a composite mold to extrude the inner layer plastic and the outer layer plastic at the same time and compositely molded in the mold.

[0003] However, since the mesh steel strip is formed by welding, the welding quality requirements are high, and the welding operation is difficult. In addition, the inner and outer layers of the composite pipe are formed in the mold through a composite mold, which further increases the difficulty and complexity of the manufacturing process. At the same time, since the mesh steel strip is welded into a tubular shape, the manufactured composite pipe cannot be coiled, which is not conducive to the storage and transportation of the composite pipe. In addition, the composite pipe is formed by extruding the inner layer plastic and the outer layer plastic at the same time and composite forming in the mold. Although in the composite forming process, part of the inner layer plastic and the outer layer plastic will be combined together through the holes on the mesh steel strip, so that the inner layer plastic, the mesh steel strip and the outer layer plastic are combined together. However, the non-hole part of the mesh steel strip is actually easy to be in a layered state with the inner layer plastic and the outer layer plastic, respectively, so that the bonding strength of the inner layer plastic, the mesh steel strip and the outer layer plastic is low, and thus the overall structural stability of the composite pipe is poor and the rigidity is low. Summary of the invention

[0004] The purpose of the present invention is to overcome the technical problems of the prior art such as poor structural stability and complex production process of the perforated steel strip composite pipe, and to provide a perforated steel strip wrapped reinforced composite pipe and its production system and production process. The perforated steel strip wrapped reinforced composite pipe has the advantages of good structural stability, simple production process, and easy storage and transportation.

[0005] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a mesh steel strip wrapped reinforced composite pipe, comprising: a plastic core pipe; a first mesh steel strip, the first mesh steel strip is wound along a first spiral direction on the radial outside of the plastic core pipe and the first mesh steel strip has a plurality of first through holes; a second mesh steel strip, the second mesh steel strip is wound along a second spiral direction opposite to the first spiral direction on the radial outside of the first mesh steel strip and the second mesh steel strip has a plurality of second through holes, the second through holes at least partially overlap with the first through holes, the overlapping part forms a third through hole, and the third through hole is filled with a connecting material; and a plastic protective layer, the plastic protective layer is arranged on the radial outside of the second mesh steel strip.

[0006] Through the above technical solution, the first mesh steel belt is wound along the first spiral direction on the radial outer side of the plastic core tube, and the second mesh steel belt is wound on the radial outer side of the first mesh steel belt. Since the mesh steel belt 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 easy to coil, which is conducive to the storage and transportation of the reinforced composite pipe. Moreover, the reinforced composite pipe of the present invention includes a plastic core tube and a plastic protective layer. During the production process, it is not necessary to simultaneously composite the inner layer tube and the outer layer tube in the mold, which further reduces the production difficulty of the reinforced composite pipe. In addition, the second through hole of the second mesh steel belt overlaps at least partially with the first through hole of the first mesh steel belt, and the overlapping part forms a third through hole, and the third through hole can be filled with a connecting material, such as plastic or glue, so that the connecting material forms a "rivet" structure between the plastic core tube and the plastic protective layer through the third through hole, thereby improving the overall structural stability and rigidity of the reinforced composite pipe.

[0007] In some embodiments, the mesh steel strip wrapped reinforced composite pipe provided by the present invention also includes a first rubber layer composited on the outer circumference of the plastic core pipe, and the first mesh steel strip is wrapped on the outer circumference of the first rubber layer along the first spiral direction.

[0008] In some embodiments, the mesh steel strip wound reinforced composite pipe provided by the present invention further includes a second rubber layer compounded on the radially outer side of the second mesh steel strip, and the plastic protective layer is compounded on the outer peripheral surface of the second rubber layer.

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

[0010] In some embodiments, the center line of the reinforced composite tube forms a first spiral winding angle with the first spiral direction, the center line forms 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 between 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] Wherein, α is the first helical winding angle and the second helical winding angle;

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

[0014] In some embodiments, the calculation relationship between 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 a diameter of the second through hole is not less than a diameter of the first through hole.

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

[0019] In some embodiments, the first mesh steel belt is wound around the radially outer side of the plastic core tube along the first spiral direction and a first gap is formed between adjacent spirals.

[0020] In some embodiments, the second mesh steel belt is wound along the second spiral direction on the radially outer side of the first mesh steel belt and a second gap is formed between adjacent spirals.

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

[0022] The second aspect of the present invention provides a production system for a mesh steel strip wrapped reinforced composite pipe, the production system is used to produce the aforementioned mesh steel strip wrapped reinforced composite pipe, comprising: a core tube extruder, the core tube extruder is used to extrude the plastic core tube; a first winding machine, the first winding machine is used to wind the first mesh steel strip around the radial outside of the plastic core tube along the first spiral direction; a second winding machine, the second winding machine is used to wind the second mesh steel strip around the radial outside of the first mesh steel strip along the second spiral direction and make at least part of the second through hole overlap with the first through hole, the overlapping part forming the third through hole; and a plastic protective layer extruder, the plastic protective layer extruder is used to extrude the plastic protective layer.

[0023] In some embodiments, the production system of the mesh steel strip wrapped reinforced composite pipe provided by the present invention also includes a first rubber layer composite mold, which is used to composite a first rubber layer on the outer peripheral surface of the plastic core pipe, and the first mesh steel strip is wrapped on the outer peripheral surface of the first rubber layer.

[0024] In some embodiments, the production system of the mesh steel strip wrapped reinforced composite pipe provided by the present invention also includes a second rubber layer composite mold, which is used to composite a second rubber layer on the radial outside of the second mesh steel strip, and the plastic protective layer is composited on the outer peripheral surface of the second rubber layer.

[0025] A third aspect of the present invention provides a production process for a mesh steel strip wound reinforced composite pipe, comprising the following steps:

[0026] S1, extrusion plastic core tube;

[0027] S2, winding a first mesh steel belt around the radial outer side of the plastic core tube along a first spiral direction, wherein the first mesh steel belt includes a plurality of first through holes;

[0028] S3, winding a second mesh steel belt around the radially outer side of the first mesh steel belt along a second spiral direction opposite to the first spiral direction, wherein the second mesh steel belt comprises a plurality of second through holes, wherein the second through holes at least partially overlap with the first through holes, and the overlapping portion forms a third through hole;

[0029] S4, disposing a plastic protective layer on the radial outer side of the second mesh steel belt.

[0030] In some embodiments, along the width direction of the first mesh steel strip, a line connecting the first through-hole centroids of two adjacent first through-holes and the width direction of the first mesh steel strip form a first punching angle;

[0031] Along the width direction of the second mesh steel strip, a second punching angle is formed between a connecting line of second through-hole centroids of two adjacent second through-holes and the width direction of the second mesh steel strip, and the first punching angle is equal to the second punching angle;

[0032] The center line of the reinforced composite pipe and the first spiral direction form a first spiral winding angle, the center line and the second spiral direction form a second spiral winding angle, the first spiral winding angle is equal to the second spiral winding angle, and the calculation relationship between the first spiral winding angle, the second spiral winding angle, the first punching angle and the second punching angle satisfies the following formula:

[0033] 2α-100°≤β≤2α-80°;

[0034] Wherein, α is the first helical winding angle and the second helical winding angle;

[0035] β is the first punching angle and the second punching angle.

[0036] In some embodiments, the production process of the mesh steel strip wound reinforced composite pipe provided by the present invention further includes the following steps performed between step S1 and step S2:

[0037] A first adhesive layer is compounded on the outer peripheral surface of the plastic core tube.

[0038] In some embodiments, the production process of the mesh steel strip wound reinforced composite pipe provided by the present invention further includes the following steps performed between step S3 and step S4:

[0039] A second rubber layer is compounded on the radial outer side of the second mesh steel belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the structure of the mesh steel strip wound reinforced composite pipe provided by the present invention;

[0041] Figure 2 yes Figure 1 The front view of the mesh steel strip wrapped reinforced composite pipe;

[0042] Figure 3 yes Figure 2 Section view in the AA direction;

[0043] Figure 4 Schematic diagram of an embodiment of a mesh steel belt with round holes provided by the present invention;

[0044] Figure 5 It is a schematic diagram of a winding method of a mesh steel belt with circular holes of the same diameter provided by the present invention;

[0045] Figure 6 It is a schematic diagram of a winding method of a mesh steel belt with circular holes of different diameters provided by the present invention;

[0046] Figure 7 It is a schematic diagram of an embodiment of a mesh steel belt with strip-shaped holes provided by the present invention;

[0047] Figure 8 It is a schematic diagram of a winding method of a mesh steel belt with strip holes provided by the present invention.

[0048] Description of Reference Numerals

[0049] 1-plastic core tube; 2-first mesh steel belt; 21-first through hole; 3-second mesh steel belt; 31-second through hole; 32-centroid line of through holes; 4-plastic protective layer; 5-second adhesive layer; 6-first adhesive layer; 7-third through hole; 8-center line; 9-production direction. DETAILED DESCRIPTION

[0050] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0051] In the present invention, unless otherwise specified, the directions or positional relationships indicated by terms such as "up, down, left, right, inside, outside, top, bottom" etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0052] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present invention, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. 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 any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The first aspect of the present invention provides a mesh steel strip wound reinforced composite pipe, referring to Figure 1-Figure 8 As shown, the reinforced composite tube includes: a plastic core tube 1, a first mesh steel belt 2, a second mesh steel belt 3 and a plastic protective layer 4 which are arranged in sequence from the inside to the outside, wherein the first mesh steel belt 2 is wound along a first spiral direction on the radial outside of the plastic core tube 1 and the first mesh steel belt 2 has a plurality of first through holes 21, the second mesh steel belt 3 is wound along a second spiral direction opposite to the first spiral direction on the radial outside of the first mesh steel belt 2 and the second mesh steel belt 3 has a plurality of second through holes 31, the second through holes 31 at least partially overlap with the first through holes 21, the overlapping portion forms a third through hole 7, and the third through hole 7 is filled with connecting material; the plastic protective layer 4 is arranged on the radial outside of the second mesh steel belt 3.

[0056] The mesh steel strip wound reinforced composite pipe provided by the present invention has a first mesh steel strip 2 wound along the first spiral direction on the radial outer side of the plastic core pipe 1, and a second mesh steel strip 3 wound along the second spiral direction on the radial outer side of the first mesh steel strip. Since the first mesh steel strip 2 and the second mesh steel strip 3 do not need to be welded, on the one hand, the difficulty and complexity of the production process are reduced; on the other hand, the produced reinforced composite pipe is easy to coil, which is conducive to the storage and transportation of the reinforced composite pipe. Moreover, the reinforced composite pipe of the present invention 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 extruded successively, and there is no need to simultaneously compound the inner layer pipe and the outer layer pipe in the mold, which further reduces the production difficulty of the reinforced composite pipe. In addition, the third through hole 7 can be filled with a connecting material, such as plastic or glue, and 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 rigidity of the reinforced composite pipe.

[0057] In some embodiments, after the pipe with the third through hole 7 is wrapped around the first mesh steel belt 2 and the second mesh steel belt 3, it passes through the plastic protective layer mold, and at least part of the melted plastic in the mold can pass through and fill the third through hole 7, and then be connected to the plastic core tube 1 after cooling and forming, thereby forming the aforementioned "rivet" structure, thereby enhancing the overall structural stability and rigidity of the reinforced composite pipe.

[0058] Or according to an embodiment of the invention, the mesh steel strip winding reinforced composite pipe Figure 1-Figure 3 As shown, the mesh steel belt wound reinforced composite pipe provided by the present invention also includes a first adhesive layer 6 compounded on the outer peripheral surface of the plastic core pipe 1, and the first mesh steel belt 2 is wound on the outer peripheral surface of the first adhesive layer 6 along the first spiral direction. By heating the first mesh steel belt, at least part of the surface of the first adhesive layer 6 is melted through the heat conduction of the steel belt, so that the first adhesive layer 6 and the first mesh steel belt 2 are bonded, and at the same time, at least part of the plastic after the melted 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, is easy to heat and melt, and has good fluidity; on the other hand, the adhesive has good bonding properties with plastic and mesh steel belt, which can improve the connection strength. In this way, on the one hand, the plastic core pipe 1 is bonded to the first mesh steel belt 2 through the first adhesive layer 6, and the connection strength between the plastic core pipe 1 and the first mesh steel belt 2 is enhanced; 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 conducive to improving the overall structural stability and rigidity of the reinforced composite pipe and preventing the occurrence of delamination of the reinforced composite pipe.

[0059] In some embodiments, reference Figure 1-Figure 3As shown, the mesh steel strip wound reinforced composite pipe provided by the present invention further includes a second adhesive layer 5 compounded on the radially outer side of the second mesh steel strip 3, and a plastic protective layer 4 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 mesh steel strip 3 through the second adhesive layer 5, thereby enhancing the connection strength between the plastic protective layer 4 and the second mesh steel strip 3; on the other hand, the second adhesive layer 5 is fused with the first adhesive layer 6 through the third through hole 7, thereby facilitating the improvement of the overall structural stability and rigidity of the reinforced composite pipe and preventing the occurrence of delamination of the reinforced composite pipe.

[0060] In some embodiments, reference Figure 4-Figure 8 As shown, along the width direction of the first mesh steel belt 2, the first through-hole centroid line corresponding to the two adjacent first through-holes 21 and the width direction of the first mesh steel belt 2 form a first punching angle; along the width direction of the second mesh steel belt 3, the second through-hole centroid line 32 corresponding to the two adjacent second through-holes 31 and the width direction of the second mesh steel belt 3 form a second punching angle, and the first punching angle is equal to the second punching angle. In this way, when winding the first mesh steel belt 2 and the second mesh steel belt 3, it is beneficial to increase the area of ​​the overlapping part of the second through-hole 31 and the first through-hole 21, that is, to increase the area of ​​the third through-hole 7, thereby allowing more second adhesive layer 5 to pass through the third through-hole 7, further improving the overall structural stability and rigidity of the reinforced composite pipe.

[0061] In some embodiments, reference Figure 5 , Figure 6 as well as Figure 8 As shown, the center line 8 of the reinforced composite tube 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. Figure 5 , Figure 6 as well as Figure 8 As shown, the first spiral direction is the length direction of the first mesh steel belt 2 in the figure, the second spiral direction is the length direction of the second mesh steel belt 3 in the figure, and the calculation relationship between the first spiral winding angle, the second spiral winding angle, the first punching angle and the second punching angle satisfies the following formula:

[0062] 2α-100°≤β≤2α-80°;

[0063] Wherein, α is the first helical winding angle and the second helical winding angle;

[0064] β is the first punching angle and the second punching angle.

[0065] In some embodiments, in order to further increase the area of ​​the third through hole 7, thereby improving the overall structural stability and rigidity of the reinforced composite pipe, the calculation relationship between the first spiral winding angle, the second spiral winding angle, the first punching angle and the second punching angle satisfies the following formula:

[0066] 2α-95°≤β≤2α-85°.

[0067] In some embodiments, in order to further increase the area of ​​the third through hole 7, thereby improving the overall structural stability and rigidity of the reinforced composite pipe, the calculation relationship between the first spiral winding angle, the second spiral winding angle, the first punching angle and the second punching angle satisfies the following formula:

[0068] β=2α-90°.

[0069] It should be noted that, combined with Figure 4 and Figure 5 and Figure 6 As shown, or combined Figure 7 and Figure 8 As shown, a plurality of second through holes 31 are arranged in a matrix on the second mesh steel strip 3, and the centroids of any corresponding row of second through holes 31 are connected to form a second through hole centroid line 32, and the angle formed by the second through hole centroid line 32 and the width direction of the second mesh steel strip 3 is the second punching angle. A plurality of first through holes 21 are arranged in a matrix on the first mesh steel strip 2, and the centroids of any corresponding row of first through holes 21 are connected to form a first through hole centroid line, and the angle formed by the first through hole centroid line and the width direction of the first mesh steel strip 2 is the first punching angle. Figure 4-Figure 8 As shown, when the first spiral winding angle is equal to the second spiral winding angle and both are α, the first punching angle is equal to the second punching angle and both are β, and β and α satisfy: β=2α-90°, the second through hole centroid line 32 is parallel to the length direction of the first mesh steel strip 2, and the first through hole centroid line is parallel to the length direction of the second mesh steel strip 3.

[0070] In some embodiments, the size of the second through hole 31 is not less than the size of the first through hole 21, so that the third through hole 7 can be ensured to have a larger area, thereby improving the overall structural stability and rigidity of the reinforced composite pipe. In addition, the specific sizes of the second through hole 31 and the first through hole 21 are adjusted according to the diameter of the reinforced composite pipe actually produced and the width of the corresponding second mesh steel belt 3 and the first mesh steel belt 2.

[0071] In some embodiments, the shapes of the first through hole 21 and the second through hole 31 may be the same, for example, Figure 5 , Figure 6 as well as Figure 8 As shown, the first through hole 21 and the second through hole 31 are both round holes or strip holes. Of course, the shapes of the first through hole 21 and the second through hole 31 can also be different, for example, the first through hole 21 is a round hole, and the second through hole 31 is a strip hole.

[0072] In some embodiments, reference Figure 4-Figure 6As shown, the first through hole 21 and the second through hole 31 are both circular holes, the diameter of the second through hole 31 is not less than the diameter of the first through hole 21, and the diameter of the first through hole 21 is equal to the diameter of the third through hole 7. Figure 5 As shown, the diameter of the first through hole 21 is equal to the diameter of the second through hole 31, and the diameter of the third through hole 7 is equal to the diameter of the first through hole 21 and the diameter of the second through hole 31. Figure 6 As shown, the diameter of the second through hole 31 is greater than the diameter of the first through hole 21, and the second through hole 31 can completely cover the first through hole 21, and the diameter of the third through hole 7 is equal to the diameter of the first through hole 21. Moreover, the diameter of the second through hole 31 is set to be not less than the diameter of the first through hole 21, so that the second through hole 31 can completely cover the first through hole 21, which can prevent air from being trapped between the first mesh steel belt 2 and the second mesh steel belt 3, thereby affecting the product quality of the mesh steel belt winding reinforced composite pipe provided by the present invention.

[0073] Of course, as mentioned above, the shapes of the first through hole 21 and the second through hole 31 can be set arbitrarily, as long as the second through hole 31 can at least partially overlap with the first through hole 21. In some embodiments, the first through hole 21 is a bar hole, a polygonal hole, an elliptical hole or a continuous double circular hole, and the second through hole 31 is a bar hole, a polygonal hole, an elliptical hole or a continuous double circular hole. Among them, the continuous double circular hole refers to a combination of two circular holes formed in an intersecting or circumscribing manner.

[0074] In some embodiments, reference Figure 3 As shown, the first mesh steel belt 2 is wound along the first spiral direction on the radially outer side of the plastic core tube 1 and a first gap is formed between adjacent spirals, which is beneficial for coiling the reinforced composite pipe, thereby facilitating the storage and transportation of the reinforced composite pipe.

[0075] In some embodiments, reference Figure 3 As shown, the second mesh steel belt 3 is wound along the second spiral direction on the radial outer side of the first mesh steel belt 2 and a second gap is formed between adjacent spirals. Since the first mesh steel belt 2 and the second mesh steel belt 3 are wound along opposite directions, at least part of the second gap overlaps with the first gap. In this way, on the one hand, it is beneficial to the coiling of the reinforced 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 rigidity of the reinforced composite pipe.

[0076] In some embodiments, along the axial direction of the reinforced composite tube, the width of the second gap is equal to the width of the first gap, which helps to reduce the difficulty of punching and winding processes to achieve the second through hole 31 covering the first through hole 21 .

[0077] In some embodiments, the inner and outer surfaces of the first mesh steel belt 2 and the inner and outer surfaces of the second mesh steel belt 3 are coated with glue, which can enhance the connection strength between the plastic core tube 1, the first mesh steel belt 2, the second mesh steel belt 3 and the plastic protective layer 4, and further improve the overall structural stability and rigidity of the reinforced composite tube.

[0078] The second aspect of the present invention provides a production system for a mesh steel strip wrapped reinforced composite pipe, which is used to produce the aforementioned mesh steel strip wrapped reinforced composite pipe, and the production system includes: a core tube extruder, which is used to extrude a plastic core tube 1; a first winding machine, which is used to wind the first mesh steel strip 2 around the radial outside of the plastic core tube 1 along a first spiral direction; a second winding machine, which is used to wind the second mesh steel strip 3 around the radial outside of the first mesh steel strip 2 along a second spiral direction and make at least part of the second through hole 31 overlap with the first through hole 21, and the overlapping part forms a third through hole 7; and a plastic protective layer extruder, which is used to extrude a plastic protective layer 4.

[0079] In some embodiments, the production system of the mesh steel strip wrapped reinforced composite pipe provided by the present invention also includes a first rubber layer composite mold, which is used to composite the first rubber layer 6 on the outer peripheral surface of the plastic core tube 1, and the first mesh steel strip 2 is wrapped on the outer peripheral surface of the first rubber layer 6.

[0080] In some embodiments, the production system of the mesh steel strip wrapped reinforced composite pipe provided by the present invention 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.

[0081] A third aspect of the present invention provides a production process for a mesh steel strip wound reinforced composite pipe, comprising the following steps:

[0082] S1, extruding plastic core tube 1;

[0083] S2, winding the first mesh steel belt 2 around the radial outer side of the plastic core tube 1 along the first spiral direction, the first mesh steel belt 2 comprising a plurality of first through holes 21;

[0084] S3, winding the second mesh steel belt 3 around the radially outer side of the first mesh steel belt 2 along a second spiral direction opposite to the first spiral direction, the second mesh steel belt 3 comprising a plurality of second through holes 31, the second through holes 31 at least partially overlap with the first through holes 21, and the overlapping portion forms a third through hole 7;

[0085] S4, disposing the plastic protective layer 4 on the radial outer side of the second mesh steel belt 3.

[0086] In some embodiments, along the width direction of the first mesh steel strip 2, the first through-hole centroid line corresponding to the two adjacent first through holes 21 and the width direction of the first mesh steel strip 2 form a first punching angle; along the width direction of the second mesh steel strip 3, the second through-hole centroid line 32 corresponding to the two adjacent second through holes 31 and the width direction of the second mesh steel strip 3 form a second punching angle, and the first punching angle is equal to the second punching angle; 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 between the first spiral winding angle, the second spiral winding angle, the first punching angle and the second punching angle satisfies the following formula:

[0087] 2α-100°≤β≤2α-80°;

[0088] Wherein, α is the first helical winding angle and the second helical winding angle;

[0089] β is the first punching angle and the second punching angle.

[0090] In some embodiments, in order to further increase the area of ​​the third through hole 7, thereby improving the overall structural stability and rigidity of the reinforced composite pipe, the calculation relationship between the first spiral winding angle, the second spiral winding angle, the first punching angle and the second punching angle satisfies the following formula:

[0091] 2α-95°≤β≤2α-85°.

[0092] In some embodiments, in order to further increase the area of ​​the third through hole 7, thereby improving the overall structural stability and rigidity of the reinforced composite pipe, the calculation relationship between the first spiral winding angle, the second spiral winding angle, the first punching angle and the second punching angle satisfies the following formula:

[0093] β=2α-90°.

[0094] In some embodiments, the production process of the mesh steel strip wound reinforced composite pipe provided by the present invention further includes the following steps performed between step S1 and step S2:

[0095] A first adhesive layer 6 is compounded on the outer peripheral surface of the plastic core tube 1 .

[0096] In some embodiments, the production process of the mesh steel strip wound reinforced composite pipe provided by the present invention further includes the following steps performed between step S3 and step S4:

[0097] The second rubber layer 5 is compounded on the radial outer side of the second mesh steel belt 3 .

[0098] The following is a detailed description of the production process of the mesh steel strip wound reinforced composite pipe provided by the present invention.

[0099] 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 to 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 present invention 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.

[0100] 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 mesh steel strip wound reinforced composite pipe, characterized in that: include: Plastic core tube (1); A first mesh steel belt (2), the first mesh steel belt (2) being wound along a first spiral direction on the radially outer side of the plastic core tube (1) and the first mesh steel belt (2) having a plurality of first through holes (21); a second mesh steel belt (3), the second mesh steel belt (3) being wound around the radially outer side of the first mesh steel belt (2) along a second spiral direction opposite to the first spiral direction and the second mesh steel belt (3) having a plurality of second through holes (31), the second through holes (31) at least partially overlapping with the first through holes (21), the overlapping portion forming a third through hole (7), the third through hole (7) being filled with a connecting material; and A plastic protective layer (4), wherein the plastic protective layer (4) is arranged radially outside the second mesh steel belt (3).

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

3. The mesh steel strip wound reinforced composite pipe according to claim 1, characterized in that: It also comprises a second rubber layer (5) compounded on the radially outer side of the second mesh steel belt (3), and the plastic protective layer (4) is compounded on the outer peripheral surface of the second rubber layer (5).

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

5. The mesh steel strip wound reinforced composite pipe according to claim 4, characterized in that: The center line (8) of the reinforced composite pipe forms a first spiral winding angle with the first spiral direction, the center line (8) forms 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 between 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 helical winding angle and the second helical winding angle; β is the first punching angle and the second punching angle.

6. The mesh steel strip wound reinforced composite pipe according to claim 5, characterized in that: The calculation relationship between 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 mesh steel strip wound reinforced composite pipe according to claim 1, characterized in that: The first through hole (21) and the second through hole (31) have the same shape.

8. The mesh steel strip wound reinforced composite pipe according to claim 7, characterized in that: The first through hole (21) and the second through hole (31) are both 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 mesh steel strip wound reinforced composite pipe according to claim 1, characterized in that: 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 mesh steel strip wound reinforced composite pipe according to claim 1, characterized in that: The first mesh steel belt (2) is wound along the first spiral direction on the radially outer side of the plastic core tube (1) and a first gap is formed between adjacent spirals.

11. The mesh steel strip wound reinforced composite pipe according to claim 10, characterized in that: The second mesh steel belt (3) is wound along the second spiral direction on the radially outer side of the first mesh steel belt (2) and a second gap is formed between adjacent spirals.

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

13. A production system for a mesh steel strip wound reinforced composite pipe, characterized in that: Used to produce the mesh steel strip wound reinforced composite pipe according to any one of claims 1 to 12, the production system comprises: A core tube extruder, the core tube extruder is used to extrude the plastic core tube (1); A first winding machine, the first winding machine being used to wind the first mesh steel belt (2) along the first spiral direction around the radial outer side of the plastic core tube (1); a second winding machine, the second winding machine being used to wind the second mesh steel belt (3) along the second spiral direction around the radially outer side of the first mesh steel belt (2) so that at least a portion of the second through hole (31) overlaps with the first through hole (21), and the overlapping portion forms the third through hole (7); and A plastic protective layer extruder, wherein the plastic protective layer extruder is used to extrude the plastic protective layer (4).

14. The production system of mesh steel strip wound reinforced composite pipe according to claim 13, characterized in that: It also comprises a first adhesive layer composite mould, which is used to composite a first adhesive layer (6) on the outer peripheral surface of the plastic core tube (1), and the first mesh steel belt (2) is wound on the outer peripheral surface of the first adhesive layer (6).

15. The production system of mesh steel strip wound reinforced composite pipe according to claim 13, characterized in that: It also includes a second adhesive layer composite mold, which is used to composite a second adhesive layer (5) on the radially outer side of the second mesh steel belt (3), and the plastic protective layer (4) is composited on the outer peripheral surface of the second adhesive layer (5).

16. A production process for a mesh steel strip wound reinforced composite pipe, characterized in that: The following steps are involved: S1, extruding a plastic core tube (1); S2, winding a first mesh steel belt (2) along a first spiral direction around the radially outer side of the plastic core tube (1), wherein the first mesh steel belt (2) comprises a plurality of first through holes (21); S3, winding a second mesh steel belt (3) around the radial outer side of the first mesh steel belt (2) along a second spiral direction opposite to the first spiral direction, the second mesh steel belt (3) comprising a plurality of second through holes (31), the second through holes (31) at least partially overlapping with the first through holes (21), the overlapping portion forming a third through hole (7); S4, disposing a plastic protective layer (4) on the radial outer side of the second mesh steel belt (3).

17. The production process of a mesh steel strip wound reinforced composite pipe according to claim 16, characterized in that: Along the width direction of the first mesh steel strip (2), a first punching angle is formed between a connecting line of first through-hole centroids of two adjacent first through holes (21) and the width direction of the first mesh steel strip (2); Along the width direction of the second mesh steel strip (3), a second through-hole centroid connecting line (32) corresponding to two adjacent second through-holes (31) and the width direction of the second mesh steel strip (3) form a second punching angle, and the first punching angle is equal to the second punching angle; The center line (8) of the reinforced composite pipe forms a first spiral winding angle with the first spiral direction, the center line (8) forms 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 between 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 helical winding angle and the second helical winding angle; β is the first punching angle and the second punching angle.

18. The production process of a mesh steel strip wound reinforced composite pipe according to claim 16 or 17, characterized in that: The following steps are also included between step S1 and step S2: A first rubber layer (6) is compounded on the outer peripheral surface of the plastic core tube (1).

19. The production process of a mesh steel strip wound reinforced composite pipe according to claim 16 or 17, characterized in that: The following steps are also included between step S3 and step S4: A second rubber layer (5) is compounded on the radially outer side of the second mesh steel belt (3).

Images