Guide pipe integrally formed by composite material and provided with flange and preparation method of guide pipe

Abstract

The invention provides a guide pipe integrally formed by a composite material and provided with a flange and a preparation method of the guide pipe, and belongs to the field of flange pipe production. The preparation method comprises the following steps: S1, preparing a core mold, and mounting the core mold on a clamp of a braiding machine; s2, a reinforced fiber fabric is woven on the core mold, a flange guide pipe prefabricated body is formed, the flange guide pipe prefabricated body comprises a circular-truncated-cone-shaped prefabricated body section and a guide pipe main body prefabricated body section, and the large-diameter end of the circular-truncated-cone-shaped prefabricated body section is located on the side, away from the guide pipe main body prefabricated body section, of the circular-truncated-cone-shaped prefabricated body section; s3, the circular-truncated-cone-shaped prefabricated body section is folded outwards to be in a flange shape; and S4, the folded flange guide pipe prefabricated body is subjected to curing forming. According to the flange pipe, the flange part and the guide pipe are integrally formed through the reinforced fiber fabric, the reinforced fiber fabric is continuous and not broken, the mechanical property is guaranteed, and the breaking risk caused by the laying or secondary bonding process of an existing flange pipe is avoided.

Description

Technical Field

[0001] The invention belongs to the field of flange pipe production, and in particular relates to a composite material integrally formed conduit with a flange and a preparation method thereof. Background Art

[0002] At present, in the field of composite materials, flange pipes basically adopt carbon fiber wet winding process, and are wound according to a pre-designed composite material layer plan, wound to a specified thickness and cured to form, thereby realizing the preparation of a carbon fiber conduit, and then preparing a carbon fiber flange end. After the flange end is prepared, it is then combined with the carbon fiber conduit and the carbon fiber flange end by integral paving or secondary bonding to prepare a carbon fiber flange pipe. The carbon fiber structure of this type of flange pipe may have the risk of interface fracture (see the structural diagram of the relevant flange pipe). Figure 5 ).

[0003] Therefore, the shortcomings of the current carbon fiber flange are that the current carbon fiber flange tube is prepared by integrally paving or secondary bonding a carbon fiber conduit and a carbon fiber flange end, and the carbon fiber structure may have the risk of interface fracture. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a method for preparing a composite material-integrated flanged conduit, which is used to solve the problem that the current carbon fiber flange tube in the prior art is prepared by integrally paving or secondary bonding a carbon fiber conduit and a carbon fiber flange end, and the carbon fiber structure may have the risk of interface fracture.

[0005] To achieve the above-mentioned object and other related objects, the present invention provides a method for preparing a composite material integrally formed conduit with a flange, the preparation method comprising: S1: Prepare the core mold and install it on the clamp of the braiding machine; S2: weaving the reinforced fiber fabric on the core mold by a weaving machine to form a flange duct preform, wherein the flange duct preform comprises a truncated cone preform segment and a duct body preform segment, wherein the larger diameter end of the truncated cone preform segment is located on a side of the truncated cone preform segment away from the duct body preform segment; S3: folding the truncated cone-shaped preform segment outward into a flange shape; S4: Curing and forming the folded flange conduit preform.

[0006] As an optional solution, when preparing a catheter with a flange on one side, in step S1, when preparing the core mold, a first core mold is selected, and the first core mold includes a catheter body core mold segment and a truncated cone segment, and the catheter body core mold segment and the truncated cone segment are transitioned by a rounded corner, the diameter of the larger end of the truncated cone segment is a, and the diameter of the catheter body core mold segment close to the truncated cone segment is b, and a>b.

[0007] As an optional solution, when preparing a catheter with flanges on both ends, in step S1, when preparing the core mold, a second core mold is selected, and the second core mold includes a catheter body core mold segment and two truncated cone segments, and the two truncated cone segments are respectively located on the left and right sides of the catheter body core mold segment.

[0008] As an optional solution, in step S1, the side cone angle of the frustum of the frustum of the frustum shaped segment is 10°-80°.

[0009] As an optional solution, the braiding machine is a single-ring braiding machine, a three-ring interlaced braiding machine or a four-ring interlaced braiding machine.

[0010] As an optional solution, in step S2, the braiding angle of the flange conduit preform is 10°-85°.

[0011] As an optional solution, the reinforcing fiber fabric is one or more of glass fiber, quartz fiber, basalt fiber, carbon fiber, and aramid fiber.

[0012] As an optional solution, in the step S2, after the flange duct preform is woven, the flange duct preform is removed from the core mold to facilitate the subsequent folding of the truncated cone preform segment.

[0013] As an optional solution, in the step S4, the folded flange conduit preform is formed by vacuum infusion.

[0014] A composite material integrally formed conduit with a flange is obtained by adopting the above-mentioned preparation method.

[0015] As described above, the composite material integrally formed conduit with flange and the preparation method thereof of the present invention have at least the following beneficial effects: 1. In this application, the flange part is woven into a whole with a reinforced fiber fabric and a conduit. The reinforced fiber fabric is continuous and unbroken, which ensures the mechanical properties and avoids the risk of breakage caused by the existing flange pipe laying or secondary bonding process; 2. The present application can produce flanges of different sizes by setting the truncated cone-shaped section of the core mold, thereby realizing the production of different products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic structural diagram of a first core mold of the present invention; Figure 2 Shown is a schematic structural diagram of a second core mold of the present invention; Figure 3 Shown is a schematic structural diagram of a first folding tool of the present invention; Figure 4 It is a schematic structural diagram of a second folding tool of the present invention; Figure 5 The structure schematic diagram of the flange pipe made of the existing metal flange end and the conduit is shown; In the figure: 11, first core mold; 12, first catheter body core mold section; 13, first truncated cone section; 21. second core mold; 22. second catheter body core mold segment; 23. second truncated cone segment; 31. first folding tool; 32. first hollow round tube; 33. first flange; 41. second folding tool; 42. second hollow round tube; 43. second flange; 51. A first flange conduit preform; 52. A second flange conduit preform. DETAILED DESCRIPTION

[0017] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0018] See also Figures 1 to 4 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0019] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0020] In Example 1, the preparation of a conduit with a flange on only one side is taken as an example. See also Figure 1 and Figure 3 The present invention provides a method for preparing a composite material integrally formed conduit with a flange, the preparation method comprising: S1: Prepare the core mold and install it on the clamp of the braiding machine; In the step S1, a first core mold 11 is selected, the first core mold 11 includes a first catheter body core mold segment 12 and a first truncated cone segment 13, the first catheter body core mold segment 12 and the first truncated cone segment 13 are transitioned by a rounded corner, the diameter of the larger end of the first truncated cone segment 13 is a, the diameter of the first catheter body core mold segment 12 close to the first truncated cone segment 13 is b, a>b, and the side cone angle of the truncated cone of the first truncated cone segment 13 is 10°-80°; The clamp of the braiding machine can be a manipulator or a movable slide mounted with a three-jaw chuck, that is, the first core mold 11 can be driven by the clamp of the braiding machine to move normally during braiding.

[0021] S2: Weaving the reinforced fiber fabric on the first core mold 11 with a weaving machine to form a flange duct preform, at which time the flange duct preform is a first flange duct preform 51, which includes a truncated cone preform segment and a duct body preform segment, and the larger diameter end of the truncated cone preform segment is located on the side of the truncated cone preform segment away from the duct body preform segment; Since the first flange conduit preform 51 generally has a certain thickness, the first flange conduit preform 51 can be woven layer by layer by a braiding machine to a corresponding thickness, or can be woven once to form a desired thickness; The braiding machine is not limited here, and is mainly used to braid the first flange conduit preform 51 into shape. The braiding machine may be a single-ring braiding machine, a three-ring interlaced braiding machine, a four-ring interlaced braiding machine, etc.; In the step S2, the braiding angle of the first flange conduit preform 51 is 10°-85°; The reinforcing fiber fabric is one or more of glass fiber, quartz fiber, basalt fiber, carbon fiber, aramid fiber, etc.; in this embodiment, carbon fiber is selected for weaving; In the step S2, after the first flange duct preform 51 is woven, the first flange duct preform 51 is removed from the first core mold 11 to facilitate the subsequent folding of the truncated cone-shaped preform segment. When the first core mold 11 is removed, the preform segment on the first duct main body core mold segment 12 is held and the first flange duct preform 51 is pulled toward the side away from the first truncated cone segment 13, so that the first flange duct preform 51 can be removed from the first core mold 11.

[0022] S3: folding the truncated cone-shaped preform segment outward into a flange shape; In order to better fold the truncated cone preform, the folding efficiency can be improved by a folding tool, the folding tool is a first folding tool 31, the first folding tool 31 can be a flange tube with a first flange 33 at one end, the flange tube includes a first hollow circular tube 32 and a first flange 33, the first hollow circular tube 32 and the first flange 33 are fixedly connected, the first flange 33 is located on the left side of the first hollow circular tube 32, the inner diameter of the first hollow circular tube 32 is equal to the outer diameter of the catheter body preform section, the catheter body preform The segment is inserted into the first hollow circular tube 32 from the left side, and the intersection position of the catheter main body preform segment and the truncated cone preform segment is located on the plane where the left end face of the first flange 33 is located, the truncated cone preform segment is folded toward the first flange 33, so that the outer wall of the truncated cone preform segment is fitted with the left end face of the first flange 33, the tightly woven carbon fibers are spread out at the folds of the truncated cone preform segment, the gap between the carbon fibers is adjusted, and the entire truncated cone preform segment is straightened without changing the mechanical performance indicators, thereby realizing the folding of the truncated cone preform segment.

[0023] S4: curing the folded first flange conduit preform 51; In the step S4, the folded first flange conduit preform 51 is formed by vacuum infusion.

[0024] A composite material integrally formed conduit with a flange is obtained by using the above-mentioned preparation method.

[0025] In Example 2, the preparation of a conduit with flanges on both sides is taken as an example. See also Figure 2 and Figure 4 The present invention provides a method for preparing a composite material integrally formed conduit with a flange, the preparation method comprising: S1: Prepare the core mold and install it on the clamp of the braiding machine; In step S1, when preparing the core mold, the second core mold 21 is selected, and the second core mold 21 includes a second catheter body core mold segment 22 and two second truncated cone segments 23. The two second truncated cone segments 23 are respectively located on the left and right sides of the second catheter body core mold segment 22, and the side cone angle of the truncated cone of the second truncated cone segment 23 is 10°-80°.

[0026] The clamp of the braiding machine can be a manipulator or a movable slide mounted with a three-jaw chuck, that is, the second core mold 21 can be driven by the clamp of the braiding machine to move normally during braiding.

[0027] At the same time, in order to allow the second core mold 21 to be removed from the flange conduit preform after the flange conduit preform is woven, it can be achieved in at least the following three ways: The first implementation method of the second core mold 21 is to process the foam into a truncated cone shape at both ends and a cylindrical shape in the middle, and to coat the surface of the foam core mold with a heat shrink film. When the flange duct preform is woven, the foam core mold is broken and the heat shrink film on its outer side is broken. This core mold is a disposable mold. A second embodiment of the second core mold 21 is to use a water-soluble material to make the second core mold 21. After the flange conduit preform is woven, the core mold can be dissolved by soaking it in water, so that the core mold can be taken out of the flange conduit preform. A third implementation manner of the second core mold 21 is to set the second core mold 21 to a splicing type, that is, two truncated cone segments and an intermediate conduit segment are spliced ​​together, and a cylindrical segment is set at the small diameter end of the two truncated cone segments, and the cylindrical segment and the truncated cone segment are transitioned by a rounded corner. The cylindrical segment and the truncated cone segment are integrally formed, and the cylindrical segment and the intermediate conduit are connected by a screw and a threaded hole. When the flange conduit preform is woven, the two truncated cone segments are removed in turn, and then the intermediate conduit segment is removed, so that the entire second core mold 21 is taken out of the flange conduit preform. At the same time, this implementation manner of the core mold can be used multiple times.

[0028] S2: weaving the reinforced fiber fabric on the second core mold 21 to form a flange duct preform, wherein the flange duct preform is a second flange duct preform 52, and the second flange duct preform 52 includes a truncated cone preform segment and a duct body preform segment, wherein the larger diameter end of the truncated cone preform segment is located on the side of the truncated cone preform segment away from the duct body preform segment; Since the second flange conduit preform 52 generally has a certain thickness, the second flange conduit preform 52 can be woven layer by layer by a braiding machine to a corresponding thickness, or can be woven once to form a desired thickness; The braiding machine is not limited here, and is mainly used to braid the second flange conduit preform 52 into shape. The braiding machine may be a single-ring braiding machine, a three-ring interweaving braiding machine, a four-ring interweaving braiding machine, etc.; In the step S2, the braiding angle of the second flange conduit preform 52 is 10°-85°; The reinforcing fiber fabric is one or more of glass fiber, quartz fiber, basalt fiber, carbon fiber, aramid fiber, etc.; in this embodiment, carbon fiber is selected for weaving; In the step S2, after the second flange conduit preform 52 is woven, the second flange conduit preform 52 is removed from the second core mold 21 to facilitate the subsequent folding of the truncated cone preform segment.

[0029] S3: folding the truncated cone-shaped preform segment outward into a flange shape; In order to better fold the truncated cone preform, the folding efficiency can be improved by a folding tool, the folding tool is a second folding tool 41, the second folding tool 41 can be a flange tube with flanges at both ends, the flange tube includes a second hollow circular tube 42 and two second flanges 43, the second hollow circular tube 42 and the second flanges 43 are fixedly connected, the two second flanges 43 are respectively located on the left and right sides of the second hollow circular tube 42, the inner diameter of the second hollow circular tube 42 is equal to the outer diameter of the catheter body preform segment, the length of the second hollow circular tube 42 is equal to the length of the catheter body preform segment, the right side of the truncated cone preform segment is converged toward the middle, and the right side of the truncated cone preform segment is made from the left side The second flange 43 passes through the second hollow circular tube 42 and extends out of the second flange 43 on the right side, and the intersection position of the conduit main body preform segment and the left truncated cone preform segment is located on the plane where the left end face of the second flange 43 is located, and the left truncated cone preform segment is folded toward the second flange 43 so that the outer wall of the left truncated cone preform segment fits with the left end face of the second flange 43, and the tightly woven carbon fibers are smoothed out at the folds of the left truncated cone preform segment to increase the gap between the carbon fibers, thereby straightening the entire left truncated cone preform segment, and then repeating the folding steps of the left truncated cone preform segment, thereby folding the right truncated cone preform segment, and realizing the folding of the two truncated cone preform segments.

[0030] S4: curing and forming the folded second flange conduit preform 52; In the step S4, the folded second flange conduit preform 52 is formed by vacuum infusion.

[0031] A composite material integrally formed conduit with a flange is obtained by using the above-mentioned preparation method.

[0032] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for preparing a composite material integrally formed conduit with a flange, characterized in that: The preparation method comprises: S1: Prepare the core mold and install it on the clamp of the braiding machine; S2: weaving the reinforced fiber fabric on the core mold by a weaving machine to form a flange duct preform, wherein the flange duct preform comprises a truncated cone preform segment and a duct body preform segment, wherein the larger diameter end of the truncated cone preform segment is located on a side of the truncated cone preform segment away from the duct body preform segment; S3: folding the truncated cone-shaped preform segment outward into a flange shape; S4: Curing and forming the folded flange conduit preform.

2. The method for preparing a composite material integrally formed conduit with a flange according to claim 1, characterized in that: When preparing a catheter with a flange on one side, in step S1, when preparing the core mold, a first core mold is selected, the first core mold includes a catheter body core mold segment and a truncated cone segment, the catheter body core mold segment and the truncated cone segment are transitioned by a rounded corner, the diameter of the larger end of the truncated cone segment is a, and the diameter of the catheter body core mold segment close to the truncated cone segment is b, and a>b.

3. The method for preparing a composite material integrally formed conduit with a flange according to claim 1, characterized in that: When preparing a catheter with flanges at both ends, in step S1, when preparing the core mold, a second core mold is selected, the second core mold includes a catheter body core mold segment and two truncated cone segments, and the two truncated cone segments are respectively located on the left and right sides of the catheter body core mold segment.

4. The method for preparing a composite material integrally formed conduit with a flange according to claim 2 or 3, characterized in that: In the step S1, the side cone angle of the truncated cone of the truncated cone segment is 10°-80°.

5. The method for preparing a composite material integrally formed conduit with a flange according to claim 1, characterized in that: The braiding machine is a single-ring braiding machine, a three-ring interlaced braiding machine or a four-ring interlaced braiding machine.

6. The method for preparing a composite material integrally formed conduit with a flange according to claim 1, characterized in that: In the step S2, the braiding angle of the flange conduit preform is 10°-85°.

7. The method for preparing a composite material integrally formed conduit with a flange according to claim 1, characterized in that: The reinforcing fiber fabric is one or more of glass fiber, quartz fiber, basalt fiber, carbon fiber and aramid fiber.

8. The method for preparing a composite material integrally formed conduit with a flange according to claim 1, characterized in that: In the step S2, after the flange duct preform is woven, the flange duct preform is removed from the core mold to facilitate the subsequent folding of the truncated cone preform segment.

9. The method for preparing a composite material integrally formed conduit with a flange according to claim 1, characterized in that: In the step S4, the folded flange conduit preform is formed by vacuum infusion.

10. A composite material integrally formed conduit with a flange, characterized in that: The method is obtained by the preparation method according to any one of claims 1 to 9.

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