Fiber-woven reinforced thermoplastic resin composite pipe

Abstract

The utility model provides a fiber woven reinforced thermoplastic resin composite pipe which comprises an inner pipe, an outer pipe, an outer reinforced layer and at least one inner reinforced layer, the outer pipe sleeves the outer side of the inner pipe, and the axis of the outer pipe coincides with the axis of the inner pipe; the outer reinforcing layer is arranged between the inner pipe and the outer pipe, and the outer reinforcing layer is fixedly connected with the outer pipe; the at least one inner reinforcing layer is fixed between the outer wall of the inner pipe and the inner wall of the outer reinforcing layer, the at least one inner reinforcing layer is arranged in the radial direction of the inner pipe, and every two adjacent inner reinforcing layers are fixed to each other; the inner reinforcing layer comprises an inner framework and an inner filling layer, and the inner filling layer is filled in a gap of the inner framework. The composite pipe is reasonable and compact in structure, the axial tensile strength of the fiber-woven reinforced thermoplastic resin composite pipe is effectively balanced and reinforced by arranging the inner reinforcing layer and the outer reinforcing layer, and the compressive strength of the fiber-woven reinforced thermoplastic resin composite pipe can also be improved; therefore, the fiber-woven reinforced thermoplastic resin composite pipe meets the requirements of axial tension and compressive strength.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pipe material, specifically relates to a kind of fiber weaving reinforced thermoplastic resin composite pipe. BACKGROUND

[0002] At present, thermoplastic resin is applied more and more widely in industry because of its good recyclability and good plasticity. However, the pipe made of existing thermoplastic resin material has a strength much lower than that of metal pipe, fiber-reinforced thermosetting resin pipe and other pipe materials. Therefore, by using thermoplastic resin as base material and adopting fiber to form a skeleton, the pipe made of pure thermoplastic resin material can be significantly improved.

[0003] In the field of power grid factories, the protective pipe for cables mainly includes plastic-coated steel pipe, PP pipe, MPP pipe and PVC pipe. The plastic-coated steel pipe has good strength performance and pressure resistance, but has the disadvantages of easy corrosion and poor insulation. Although the PP pipe, MPP pipe and PVC pipe have the advantages of corrosion resistance and insulation, they have insufficient strength and disaster prevention and reduction performance. Therefore, there is an urgent need for a new composite pipe that combines the advantages of plastic-coated steel pipe, PP pipe, MPP pipe and PVC pipe. SUMMARY

[0004] The utility model provides a kind of fiber weaving reinforced thermoplastic resin composite pipe that structure is reasonable and compact, can effectively balance and strengthen overall axial tensile strength, also can promote overall compressive strength, meet the field of axial tension and compressive strength requirement, effectively solve the problem of low strength and poor insulation of existing thermoplastic resin pipe.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a kind of fiber weaving reinforced thermoplastic resin composite pipe, including inner tube, outer tube, outer reinforcing layer and at least one layer of inner reinforcing layer;The outer tube is sleeved on the outer side of the inner tube, and the axis of the outer tube coincides with the axis of the inner tube;

[0006] The outer reinforcing layer is arranged between the inner tube and the outer tube, and the outer reinforcing layer is fixedly connected with the outer tube;

[0007] The at least one layer of inner reinforcing layer is fixed between the outer wall of the inner tube and the inner wall of the outer reinforcing layer, and the at least one layer of inner reinforcing layer is arranged along the radial direction of the inner tube, and the adjacent two layers of inner reinforcing layer are fixed with each other;The inner reinforcing layer includes inner skeleton and inner filling layer, and the inner filling layer is filled in the gap of the inner skeleton.

[0008] In some embodiments, the inner framework comprises at least one first fiber braid arranged along a first direction and at least one second fiber braid arranged along a second direction, the first direction and the second direction being mutually intersected.

[0009] In some embodiments, the first direction is a first helical direction along the outer surface of the inner tube, and the second direction is a second helical direction along the outer surface of the inner tube, the second helical direction having a lead angle complementary to 30° to 80°.

[0010] In some embodiments, the number of the second fiber braids is at least two, the two second fiber braids being arranged along the second helical direction at intervals, and the length of the second fiber braids is 5cm to 20cm.

[0011] In some embodiments, the material of the first fiber braids and the material of the second fiber braids are glass fiber or carbon fiber or basalt fiber or polyester.

[0012] In some embodiments, the outer reinforcing layer comprises an outer framework and an outer filler layer, the outer filler layer being filled in the gaps of the outer framework, the outer framework comprising at least one third fiber braid arranged along the axial direction of the outer tube at intervals, the third fiber braid being arranged along the inner surface of the outer tube in a helical manner.

[0013] In some embodiments, the helical lead angle has a complementary angle of 30° to 80°.

[0014] In some embodiments, the material of the third fiber braids is glass fiber or carbon fiber or basalt fiber or polyester.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model discloses compact structure, the setting of inner reinforcing layer and outer reinforcing layer, effectively balance and strengthen the axial tensile strength of fiber weaving reinforced thermoplastic resin composite pipe, can also promote the compressive strength of fiber weaving reinforced thermoplastic resin composite pipe, makes fiber weaving reinforced thermoplastic resin composite pipe satisfy the field of axial tension and compressive strength requirement. ACCURACY OF DRAWINGS

[0017] Figure 1 It is the structural schematic diagram of fiber weaving reinforced thermoplastic resin composite pipe of the utility model;

[0018] Figure 2 It is the cross section schematic view of fiber weaving reinforced thermoplastic resin composite pipe of the utility model;

[0019] Figure 3 is a schematic view of the complementary angle of the pitch angle of the second spiral direction in the utility model;

[0020] Figure 4 is a schematic view of the complementary angle of the pitch angle of the spiral in the utility model;

[0021] Figure 5 is a schematic view of the relationship between the first fiber woven body and the second fiber woven body in the fourth embodiment of the utility model.

[0022] Wherein, the reference signs are: 1, inner tube; 2, outer tube; 3, first fiber woven body; 4, second fiber woven body; 5, third fiber woven body; alpha, the complementary angle of the pitch angle of the second spiral direction; beta, the complementary angle of the pitch angle of the spiral. DETAILED DESCRIPTION

[0023] To clearly illustrate the technical features of the present application, the following will combine the drawings and embodiments to explain the implementation of the present application in detail, so that the realization process of how to apply technical means to solve technical problems and achieve corresponding technical effects can be fully understood and implemented. The embodiments of the present application and the various features in the embodiments can be combined without conflict, and the formed technical solutions are within the protection scope of the present application.

[0024] Embodiment One:

[0025] Referring to Figure 1 , 2 A fiber woven reinforced thermoplastic resin composite pipe, comprising an inner tube 1, an outer tube 2, an outer reinforcing layer and at least one inner reinforcing layer; the outer tube is sleeved on the outer side of the inner tube 1, and the axis of the outer tube 2 coincides with the axis of the inner tube 1;

[0026] The outer reinforcing layer is arranged between the inner tube and the outer tube, and the outer reinforcing layer is fixedly connected with the outer tube;

[0027] The at least one inner reinforcing layer is fixed between the outer wall of the inner tube 1 and the inner wall of the outer reinforcing layer, and the at least one inner reinforcing layer is arranged along the radial direction of the inner tube, and the adjacent two inner reinforcing layers are fixed with each other; the inner reinforcing layer comprises an inner framework and an inner filling layer, and the inner filling layer is filled in the gap of the inner framework.

[0028] According to the requirement, the inner tube 1 and the outer tube 2 are made of the existing known thermoplastic resin, the inner wall of the inner tube 1 and the outer wall of the outer tube 2 are more smooth, and in the cable passing and towed cable construction, it has good low resistance performance, and the thermoplastic resin can be PP or PVC. In the use process, the setting of the inner reinforcing layer and the outer reinforcing layer effectively balances and strengthens the axial tensile strength of the fiber woven reinforced thermoplastic resin composite pipe, and also can improve the compressive strength of the fiber woven reinforced thermoplastic resin composite pipe, so that the fiber woven reinforced thermoplastic resin composite pipe meets the field of axial tension and compressive strength requirements.

[0029] According to the actual needs, the above fiber woven reinforced thermoplastic resin composite pipe can be further optimized or / and improved:

[0030] Example two:

[0031] As an optimization of the above examples, see Figure 1 , 2 The inner skeleton includes at least one first fiber woven body 3 and at least one second fiber woven body 4, the at least one first fiber woven body 3 is arranged along the first direction, and the at least one second fiber woven body 4 is arranged along the second direction, and the first direction and the second direction intersect each other.

[0032] According to the requirement, the inner filling layer 5 is a thermoplastic resin filled in the gap between the first fiber woven body 3, the gap between the second fiber woven body 4 and the gap between the first fiber woven body 3 and the second fiber woven body 4. The thermoplastic resin can be PP or PVC, so that the innermost inner skeleton can be firmly fixed on the outer wall of the inner tube 1, the adjacent two inner skeletons can be firmly fixed together, and the outermost inner skeleton can be firmly fixed on the inner wall of the outer reinforcing layer. In the use process, the first fiber woven body 3 along the first direction and the second fiber woven body 4 along the second direction are wound on the outer surface of the inner tube 1, so that the first fiber woven body 3 and the second fiber woven body 4 are arranged closely with each other, which can improve the strength of the fiber woven reinforced thermoplastic resin composite pipe.

[0033] Example three:

[0034] As an optimization of the above examples, see Figure 3 The first direction is a first spiral direction along the outer surface of the inner tube, and the second direction is a second spiral direction along the outer surface of the inner tube, and the complementary angle α of the lead angle of the second spiral direction is 30° to 80°

[0035] When the inner diameter of the inner tube 1 is 15 cm, the complementary angle a of the lead angle of the second spiral direction is 30 to 80°, and when the inner diameter of the inner tube 1 is 200 cm, the complementary angle a of the lead angle of the second spiral direction is 40 to 70°. In this way, the first fiber braid 3 and the second fiber braid 4 are closely arranged with each other, and the strength of the fiber-braided reinforced thermoplastic resin composite pipe can be improved.

[0036] Embodiment Four:

[0037] As an optimization of the above-mentioned embodiments, refer to Figure 5 , the number of the second fiber braid 4 is at least two, and the two second fiber braids 4 are arranged at intervals along the second spiral direction, and the length of the second fiber braid 4 is 5 cm to 20 cm.

[0038] The length of the second fiber braid 4 can be set according to the inner diameter of the inner tube 1, when the inner diameter of the inner tube 1 is 15 cm, the length of the second fiber braid 4 can be 10 cm, and when the inner diameter of the inner tube 1 is 200 cm, the length of the second fiber braid 4 can be 20 cm. In this way, one or more inner reinforcing layers can be arranged from the inside to the outside according to the diameter of the inner tube 1, so as to ensure the strength of the fiber-braided resin composite pipe of different specifications.

[0039] Embodiment Five:

[0040] As an optimization of the above-mentioned embodiments, the material of the first fiber braid 3 and the material of the second fiber braid 4 are both glass fiber or carbon fiber or basalt fiber or polyester. In this way, according to different use requirements, a variety of specifications of fiber-braided reinforced thermoplastic resin composite pipes can be made, so as to meet various use requirements.

[0041] Embodiment Six:

[0042] As an optimization of the above-mentioned embodiments, refer to Figure 1 , 2 , 4, the outer reinforcing layer includes an outer skeleton and an outer filling layer, the outer filling layer is filled in the gap of the outer skeleton, the outer skeleton includes at least one third fiber braid 5, and the at least one third fiber braid 5 is arranged at intervals along the axis direction of the outer tube, and the third fiber braid 5 is arranged in a spiral shape along the inner surface of the outer tube.

[0043] According to the requirement, the at least one third fiber braid 5 is arranged along the axis direction of the outer tube, and the outer filling layer 7 is a thermoplastic resin filled between the adjacent two third fiber braids 5, which can be PP or PVC, and the outer filling layer 7 can firmly fix the outermost inner framework and the outer framework together, and firmly fix the outer framework on the inner wall of the outer tube 2. The outer framework comprises at least one third fiber braid 5 spirally arranged along the inner surface of the outer tube 2, so that the inner reinforcing layer and the outer tube 2 are connected into an integral whole through the outer reinforcing layer, and the strength of the integral whole is improved.

[0044] Embodiment seven:

[0045] As an optimization of the above-mentioned embodiments, referring to Figure 4 , the supplementary angle β of the lead angle of the spiral is 30° to 80°.

[0046] The supplementary angle β of the lead angle of the spiral is 30° to 80°, that is, the included angle β between the third fiber braid 5 and the central axis of the inner tube 1 is 30° to 80°, that is, the third fiber braid 5 is arranged along the spiral line with the supplementary angle of the lead angle of 30° to 80°, that is, along the spiral line with the lead angle of 10° to 60°. In this embodiment, the preferred angle of the winding angle of the spirally arranged third fiber braid 5 is 50° to 60°, that is, the third fiber braid 5 is arranged along the spiral line with the supplementary angle of the lead angle of 30° to 40°, that is, along the spiral line with the lead angle of 30° to 40°, so as to ensure the strength of the fiber-braided reinforced thermoplastic resin composite pipe of different specifications.

[0047] Embodiment eight:

[0048] As an optimization of the above-mentioned embodiments, the material of the third fiber braid 5 is glass fiber or carbon fiber or basalt fiber or polyester. In this way, fiber-braided reinforced thermoplastic resin composite pipes of various specifications can be made according to different use requirements, so as to meet various use requirements. In the case of the same thickness, the compressive strength of the embodiment is much higher than that of the PP pipe, MPP pipe and PVC pipe composed of pure plastic, and the insulation and corrosion resistance are much higher than those of the plastic-coated steel pipe, and the advantages of the plastic-coated steel pipe and the PP pipe, MPP pipe and PVC pipe are combined.

[0049] Finally, it should be noted that the above content is only used to illustrate the technical scheme of the present application, and is not a limitation on the protection scope of the present application. Simple modifications or equivalent replacements of the technical scheme of the present application by those skilled in the art do not deviate from the essence and scope of the technical scheme of the present application.

Claims

1. A fiber-braided reinforced thermoplastic resin composite pipe, characterized by: The pipe comprises an inner tube, an outer tube, an outer reinforcing layer and at least one inner reinforcing layer; the outer tube is sleeved outside the inner tube, and the axis of the outer tube coincides with the axis of the inner tube; The outer reinforcing layer is arranged between the inner tube and the outer tube, and the outer reinforcing layer is fixedly connected with the outer tube; The at least one inner reinforcing layer is fixed between the outer wall of the inner tube and the inner wall of the outer reinforcing layer, the at least one inner reinforcing layer is arranged along the radial direction of the inner tube, and adjacent two inner reinforcing layers are fixed with each other; the inner reinforcing layer comprises an inner framework and an inner filling layer, and the inner filling layer fills the gap in the inner framework.

2. The fiber-woven reinforced thermoplastic resin composite pipe according to claim 1, characterized by: The at least one first fiber braid is arranged along a first direction, and the at least one second fiber braid is arranged along a second direction, and the first direction and the second direction intersect with each other.

3. The fiber-woven reinforced thermoplastic resin composite pipe according to claim 2, characterized by: The first direction is a first spiral direction along the outer surface of the inner tube, and the second direction is a second spiral direction along the outer surface of the inner tube, and the complementary angle of the lead angle of the second spiral direction is 30° to 80°.

4. The fiber-woven reinforced thermoplastic resin composite pipe according to claim 3, characterized by: The number of the second fiber braids is at least two, and the two second fiber braids are arranged at intervals along the second spiral direction, and the length of the second fiber braid is 5cm to 20cm.

5. The fiber-woven reinforced thermoplastic resin composite pipe according to any one of claims 2 to 4, characterized by: The material of the first fiber braid and the material of the second fiber braid are glass fiber or carbon fiber or basalt fiber or polyester.

6. The fiber-woven reinforced thermoplastic resin composite pipe according to any one of claims 1 to 4, characterized by: The outer reinforcing layer comprises an outer framework and an outer filling layer, the outer filling layer fills the gap in the outer framework, the outer framework comprises at least one third fiber braid, the at least one third fiber braid is arranged at intervals along the axis direction of the inner tube, and the third fiber braid is arranged in a spiral shape along the inner surface of the outer tube.

7. The fiber-woven reinforced thermoplastic resin composite pipe according to claim 5, characterized by: The outer reinforcing layer comprises an outer framework and an outer filling layer, the outer filling layer fills the gap in the outer framework, the outer framework comprises at least one third fiber braid, the at least one third fiber braid is arranged at intervals along the axis direction of the inner tube, and the third fiber braid is arranged in a spiral shape along the inner surface of the outer tube.

8. The fiber-woven reinforced thermoplastic resin composite pipe according to claim 6, characterized by: The complementary angle of the lead angle of the spiral shape is 30° to 80°.

9. The fiber-woven reinforced thermoplastic resin composite pipe according to claim 7, characterized by: The complementary angle of the lead angle of the spiral shape is 30° to 80°.

10. The fiber-woven reinforced thermoplastic resin composite pipe according to any one of claims 7 to 9, characterized in that: The material of the third fiber braid is glass fiber or carbon fiber or basalt fiber or polyester.

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