Fiber woven resin composite pipe

Abstract

The utility model provides a fiber woven resin composite pipe. The fiber woven resin composite pipe comprises a pipe body, an outer woven layer and at least one group of composite layers, the outer braid layer is located on the outer side of the pipe body, the at least one composite layer is fixed between the outer wall of the pipe body and the inner wall of the outer braid layer, the at least one composite layer is arranged in the radial direction of the pipe body, and every two adjacent composite layers are fixed to each other; the composite layer comprises a fiber laying layer and a fiber winding layer, and the fiber laying layer is fixed on the inner side of the fiber winding layer; fibers of the fiber laying layers are continuously arranged in the axis direction of the pipe body; fibers of the fiber winding layer are continuously arranged in a spiral shape, and the axis of the spiral shape coincides with the axis of the pipe body. The fiber woven resin composite pipe is reasonable and compact in structure, the number of the arranged fiber laying layers can be reduced, the using amount of the fiber laying layers can be reduced, the number of the arranged fiber winding layers can be increased, the circumferential strength of the fiber woven resin composite pipe is improved, and the woven resin composite pipe has higher practical value.

Description

TECHNICAL FIELD

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

[0002] At present, the fiber woven reinforced resin composite pipe, especially the glass fiber woven reinforced resin composite pipe, is formed by the skeleton structure of the glass fiber woven pipe body, and then the resin, especially the thermosetting resin, is filled between the glass fibers, and the glass fiber woven reinforced thermosetting resin composite pipe is formed. In addition to the woven structure, the glass fiber is arranged longitudinally and circumferentially to enhance the longitudinal and circumferential strength. In the actual production process, the longitudinal strength needs to be greatly enhanced to meet the longitudinal strength of the pipeline during the traction process to avoid breaking or deforming the unhardened pipe structure during the traction process. The longitudinal tensile strength is often more than 10 times higher than the national and industry standards, which is excessive enhancement and unnecessary waste. However, the circumferential strength, which has more practical value and significance in reality, has not been enhanced to a higher strength and standard. Therefore, it is necessary to improve the structure of the existing glass fiber woven reinforced resin composite pipe, reduce the unnecessary longitudinal strength, and increase the circumferential strength, especially in the field of power grid engineering. The cable protection pipe used for power transmission and distribution has a more realistic and practical demand for the ring stiffness of the cable protection pipe. SUMMARY

[0003] The utility model discloses a kind of fiber woven resin composite pipes with reasonable and compact structure, which can reduce the number of fiber layer settings, reduce the amount of fiber layer, increase the number of fiber winding layer settings, improve the circumferential strength of fiber woven resin composite pipe, so that the woven resin composite pipe has more practical value, and effectively solve the problem that the existing resin composite pipe is easily broken or deformed by traction during the generation process.

[0004] To achieve the above object, the utility model adopts the following technical scheme: a fiber woven resin composite pipe, comprising a pipe body, an outer woven layer and at least one composite layer.

[0005] The outer woven layer is located outside the pipe body, and the at least one composite layer is fixed between the outer wall of the pipe body and the inner wall of the outer woven layer. The at least one composite layer is arranged along the radial direction of the pipe body, and the adjacent two composite layers are fixed to each other. The composite layer includes a fiber layer and a fiber winding layer, and the fiber layer is fixed inside the fiber winding layer.

[0006] The fibers of the fiber laying layer are continuously arranged along the axial direction of the pipe body; the fibers of the fiber winding layer are continuously arranged in a spiral shape, and the axial line of the spiral shape coincides with the axial line of the pipe body.

[0007] In some embodiments, the number of the composite layers is at least two groups, the angle between the fibers of the fiber winding layer and the axial line of the pipe body is a winding layer angle, and the winding layer angles of the at least two groups of the composite layers decrease successively from inside to outside.

[0008] In some embodiments, the number of the composite layers is three groups.

[0009] In some embodiments, the winding layer angle of a group of the composite layers located in the innermost layer is 80° to 85°.

[0010] In some embodiments, the winding layer angle of a group of the composite layers located in the outermost layer is 55° to 70°.

[0011] In some embodiments, the winding layer angle of a group of the composite layers located in the middle layer is 70° to 80°.

[0012] In some embodiments, the fiber laying layer comprises at least two longitudinal fiber sheets, and the at least two longitudinal fiber sheets are arranged at intervals along the circumferential direction of the pipe body; the material of the longitudinal fiber sheet is glass fiber or carbon fiber or basalt fiber or polyester.

[0013] In some embodiments, the fiber winding layer comprises at least two spiral fiber sheets, and the at least two spiral fiber sheets are arranged at intervals along the axial direction of the pipe body; the material of the spiral fiber sheet is glass fiber or carbon fiber or basalt fiber or polyester.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model discloses a reasonable and compact structure, and the fiber laying layer is arranged along the axial direction of the pipe body, and the fiber winding layer is arranged in a spiral shape along the axial direction of the pipe body outside the pipe body, when the pipe body bears axial tension, the fiber laying layer can conduct the tension to the whole fiber weaving resin composite pipe through the fiber winding layer, thereby indirectly enhancing the tensile strength of the fiber laying layer, the number of the fiber laying layer can be reduced, the amount of the fiber laying layer can be reduced, the number of the fiber winding layer can be increased, the hoop strength of the fiber weaving resin composite pipe can be improved, and the weaving resin composite pipe has more practical value. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a cross section structure schematic view of the utility model embodiment one;

[0017] Figure 2It is the structure schematic view of the fiber layer in the utility model;

[0018] Figure 3 It is the schematic view of the winding layer included angle in the utility model;

[0019] Figure 4 It is the cross section structure schematic view of embodiment three in the utility model;

[0020] Figure 5 It is the main view structure schematic view of the partial section of the outer braided layer in the utility model;

[0021] Figure 6 It is the three-dimensional structure schematic view of the partial section of the outer braided layer in the utility model embodiment five.

[0022] Wherein, the reference sign is: 1, pipe body;11, the axis of pipe body;2, outer braided layer;3, fiber layer;4, fiber winding layer;Alpha, winding layer included angle. Specific implementation

[0023] In order to clearly illustrate the technical features of the scheme, the following will be combined with the drawings and embodiments to explain the embodiment of the application in detail, by which the realization process that the application applies technical means to solve technical problems and achieves corresponding technical effects can be fully understood and implemented.The various features in the embodiments of the application and the embodiments can be combined with each other without conflict, and the technical scheme formed thereby is within the protection scope of the application.

[0024] Embodiment one:

[0025] As shown in the accompanying drawings, Figure 1 、 6 A fiber braided resin composite pipe, comprising a pipe body 1, an outer braided layer 2 and at least one group of composite layers;

[0026] The outer braided layer 2 is located on the outer side of the pipe body 1, the axis of the outer braided layer 2 and the axis of the at least one group of composite layers coincide with the axis 11 of the pipe body respectively, the at least one group of composite layers is fixed between the outer wall of the pipe body 1 and the inner wall of the outer braided layer 2, the at least one group of composite layers is arranged along the radial direction of the pipe body, and the adjacent two groups of composite layers are fixed with each other;The composite layer comprises a fiber layer 3 and a fiber winding layer 4, and the fiber layer 3 is fixed to the inner side of the fiber winding layer 4;

[0027] The fibers of the fiber layer 3 are continuously arranged along the axis 11 direction of the pipe body, that is, the fibers of the fiber layer 3 extend along the axis 11 direction of the pipe body;The fibers of the fiber winding layer 4 are continuously arranged in a spiral shape, and the axis of the spiral shape coincides with the axis 11 of the pipe body.

[0028] During use, since the fibers of the fiber lay-up 3 are continuously arranged along the axis 11 of the tube body, and the fibers of the fiber winding layer 4 are continuously arranged in a spiral shape, when the tube body 1 is subjected to axial tensile force, the fiber lay-up 3 can transmit the tensile force to the entire fiber braided resin composite tube through the fiber winding layer 4, thereby indirectly enhancing the tensile strength of the fiber lay-up 3. This can reduce the number of fiber lay-ups 3 and the amount of fiber lay-up 3 used, increase the number of fiber winding layers 4, improve the circumferential strength of the fiber braided resin composite tube, and make the braided resin composite tube more practical.

[0029] The above-mentioned fiber-braided resin composite pipe can be further optimized and / or improved according to actual needs:

[0030] Example 2:

[0031] As an optimization of the above embodiments, see the appendix. Figure 3 , 5 As shown, the number of composite layers is at least two sets. The angle between the fiber of the fiber winding layer 4 and the axis 11 of the tube body is the winding layer angle α. The winding layer angle α of the at least two sets of composite layers decreases sequentially from the inside to the outside.

[0032] The included angle α of the winding layers of at least two sets of composite layers decreases from the inside to the outside. That is, between two adjacent composite layers, the complementary angle of the spiral lead angle of the fiber winding layer 4 in the inner set of composite layers is greater than the complementary angle of the spiral lead angle of the fiber winding layer 4 in the outer set of composite layers. This allows the two adjacent fiber winding layers 4 to be intertwined without gaps or overlaps. The included angle α of the winding layers decreases from the inside to the outside. The fiber winding layers 4 are closely arranged with each other, which can enhance the strength of the fiber braided resin composite pipe in all directions, thereby improving the strength of the fiber braided resin composite pipe.

[0033] Example 3:

[0034] As an optimization of the above embodiments, see the appendix. Figure 1 , 3 As shown in Figure 4, there are three sets of composite layers. The winding angle α of the innermost composite layer is 80° to 85°, the winding angle α of the outermost composite layer is 55° to 70°, and the winding angle α of the middle composite layer is 70° to 80°.

[0035] The innermost set of composite layers has a winding angle α of 80° to 85°, meaning the fiber winding layer 4 in the innermost set of composite layers is arranged along a spiral line with an auxiliary lead angle of 80° to 85°, or a spiral line with a lead angle of 5° to 10°. The middle set of composite layers has a winding angle α of 70° to 80°, meaning the fiber winding layer 4 in the middle layer is arranged along a spiral line with an auxiliary lead angle of 70° to 80°, or a spiral line with an auxiliary lead angle of 5° to 10°. The spiral is set with a 10° to 20° angle; the included angle α of the outermost set of composite layers is 55° to 70°, that is, the outermost circumferential continuous fiber winding layer is set along a spiral with an auxiliary angle of 55° to 70°, that is, along a spiral with a lead angle of 20° to 35°. One or more composite layers can be set along the radial direction of the pipe body 1 from the inside to the outside between the outer side of the pipe body 1 and the outer braided layer 2 to ensure the strength of fiber braided resin composite pipes of different specifications.

[0036] Example 4:

[0037] As an optimization of the above embodiments, see the appendix. Figure 1 , 2 As shown in Figure 4, the fiber layup 3 includes at least two longitudinal fiber sheets, which are arranged at intervals along the circumference of the tube body; the longitudinal fiber sheets are made of glass fiber, carbon fiber, basalt fiber, or polyester.

[0038] Longitudinal fiber sheets made of glass fiber, carbon fiber, basalt fiber, or polyester are spaced apart along the circumference of the tube body 1. Resin is filled between the longitudinal fiber sheets to form a whole with the outer braided layer 2. The included angle α of the winding layer decreases from the inside to the outside, which allows the number of longitudinal fiber sheets in the fiber layup 3 spaced apart along the circumference of the tube body 1 to gradually decrease from the inside to the outside. The longitudinal fiber sheets extend continuously along the axial direction of the tube body 1, thus reducing the number of single layers of longitudinal fiber sheets in the fiber layup 3, reducing the density of the fiber layup 3, thereby increasing the resin filling degree between the longitudinal fiber sheets and enhancing the overall strength of the fiber braided resin composite pipe.

[0039] Example 5:

[0040] As an optimization of the above embodiments, see the appendix. Figure 6 As shown, the fiber winding layer 4 includes at least two helical fiber sheets, which are arranged at intervals along the axial direction of the tube. Figure 6 The medium fiber winding layer includes three helical fiber sheets; the helical fiber sheets are made of glass fiber, carbon fiber, basalt fiber, or polyester.

[0041] Appendix Figure 4The spiral fiber sheet of the composite layer is made of glass fiber or carbon fiber or basalt fiber or polyester material, and the spiral fiber sheet is spirally arranged along the pipe body 1, and the spiral fiber sheet is filled with resin to facilitate the fiber woven resin composite pipe to form an integral whole, so that a plurality of specifications of the fiber woven resin composite pipe can be manufactured according to different use requirements, so as to meet various use requirements.

[0042] In this way, the resin between the spiral fiber sheets of the composite layer can be more fully bonded with the spiral fiber sheets, thereby enhancing the overall force between the fiber sheets, when the longitudinal fiber sheet bears the longitudinal tensile force, the tensile force can be transmitted to the entire spiral fiber sheet, thereby indirectly enhancing the longitudinal tensile strength of the longitudinal fiber sheet, the number of longitudinal fiber sheets can be reduced, the amount of fiber laying layer can be reduced, the amount of spiral fiber sheet of the composite pipe can be increased, and the performance of the fiber woven resin composite pipe can be enhanced on the circumferential strength which is more practical.

[0043] Finally, it should be noted that the above content is only used to illustrate the technical solutions 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 solutions of the present application by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A fiber-braided resin composite tube, characterized by: The pipe body, the outer braided layer and at least one set of composite layers are provided. The outer braided layer is located outside the pipe body, and the at least one set of composite layers is fixed between the outer wall of the pipe body and the inner wall of the outer braided layer, and the at least one set of composite layers is arranged along the radial direction of the pipe body, and adjacent two sets of the composite layers are fixed to each other. The fibers of the fiber laying layer are continuously arranged along the axial direction of the pipe body, and the fibers of the fiber winding layer are continuously arranged in a spiral shape, and the axial line of the spiral shape coincides with the axial line of the pipe body.

2. The fiber-woven resin composite pipe according to claim 1, characterized by: The number of the composite layers is at least two sets, the included angle between the fibers of the fiber winding layer and the axial line of the pipe body is a winding layer included angle, and the winding layer included angles of the at least two sets of the composite layers gradually decrease from inside to outside.

3. The fiber-woven resin composite pipe according to claim 2, characterized by: The number of the composite layers is three sets.

4. The fiber-woven resin composite pipe according to claim 3, characterized by: The winding layer included angle of the composite layer located in the innermost layer is 80° to 85°.

5. The fiber-woven resin composite pipe according to claim 3 or 4, characterized by: The winding layer included angle of the composite layer located in the outermost layer is 55° to 70°.

6. The fiber-woven resin composite pipe according to claim 3 or 4, characterized by: The winding layer included angle of the composite layer located in the middle layer is 70° to 80°.

7. The fiber-woven resin composite pipe according to claim 5, characterized by: The winding layer included angle of the composite layer located in the middle layer is 70° to 80°.

8. The fiber-woven resin composite pipe according to any one of claims 1 to 3, characterized by: The fiber laying layer comprises at least two longitudinal fiber sheets, and the at least two longitudinal fiber sheets are arranged at intervals along the circumferential direction of the pipe body.

9. The fiber-woven resin composite pipe according to any one of claims 1 to 3, characterized by: The fiber winding layer comprises at least two spiral fiber sheets, and the at least two spiral fiber sheets are arranged at intervals along the axial direction of the pipe body.

10. The fiber-woven resin composite pipe according to claim 8, characterized by: The fiber winding layer comprises at least two spiral fiber sheets, and the at least two spiral fiber sheets are arranged at intervals along the axial direction of the pipe body. The spiral fiber sheets are made of glass fiber, carbon fiber, basalt fiber or polyester.

Images