阅读说明：本技术 一种定向加强的管材及其制备方法 (Directional reinforced pipe and preparation method thereof ) 是由 高彤 张卫红 宋龙龙 邓可欣 于 2020-05-07 设计创作，主要内容包括：本发明公开一种定向加强的管材及其制备方法,其中,该管材包括相套接的内管部、外管部和过渡连接管部,所述过渡连接管部用于连接所述内管部的外壁和所述外管部的内壁,以在设定方向上对所述管材进行加强。相比于传统的各向同性的管材,本发明所提供管材在内管部和外管部之间设置了过渡连接管部,可以在设定方向上对管材进行加强,使得管材在设定方向的强度和刚度可以大于其他方向,如此,在单方向(主承载方向)强度和刚度需求较大的场合使用时,可以避免非主承载方向上管材强度和刚度的浪费,而且,可以更大程度地提高产品的轻量化水平,以满足当前轻量化的发展需求。(The invention discloses a directionally reinforced pipe and a preparation method thereof, wherein the pipe comprises an inner pipe part, an outer pipe part and a transition connecting pipe part which are sleeved with each other, and the transition connecting pipe part is used for connecting the outer wall of the inner pipe part and the inner wall of the outer pipe part so as to reinforce the pipe in a set direction. Compared with the traditional isotropic pipe, the transitional connecting pipe part is arranged between the inner pipe part and the outer pipe part of the pipe provided by the invention, and the pipe can be reinforced in the set direction, so that the strength and rigidity of the pipe in the set direction can be higher than those in other directions, therefore, when the pipe is used in an occasion with higher requirements on the strength and rigidity in a single direction (main bearing direction), the waste of the strength and rigidity of the pipe in a non-main bearing direction can be avoided, and the light weight level of a product can be improved to a greater extent, so that the current development requirement on light weight can be met.)

1. The utility model provides a directional tubular product of strengthening, its characterized in that, is including inner tube portion (1), outer tube portion (2) and the transition connection pipe portion (3) that cup joint mutually, transition connection pipe portion (3) are used for connecting the outer wall of inner tube portion (1) with the inner wall of outer tube portion (2) is right in the direction of setting for tubular product is strengthened.

2. The directionally reinforced tube as claimed in claim 1, wherein the transition connection tube portion (3) comprises an oval tube (31), the oval tube (31) being fitted over the inner tube portion (1);

the inner walls of the two ends of the short axis of the elliptical tube (31) are connected with the inner tube part (1), and the outer walls of the two ends of the long axis of the elliptical tube are connected with the outer tube part (2); or the inner wall of one end of the long shaft of the oval tube (31) is connected with the inner tube part (1), and the outer wall of the other end of the long shaft of the oval tube is connected with the outer tube part (2).

3. The tube material for directional reinforcement according to claim 1, characterized in that the transitional connecting tube portion (3) comprises more than two elliptical tubes (31), the elliptical tubes (31) are sleeved with each other, the innermost elliptical tube (31) is sleeved outside the inner tube portion (1), the transitional connecting tube portion (3) is connected with the inner wall of the innermost elliptical tube (31) and the outer wall of the outermost elliptical tube (31) and the outer tube portion (2), and the two adjacent elliptical tubes (31) are connected.

4. The tube material for directional reinforcement according to claim 3, wherein the major axes of the oval tubes (31) are arranged in the same direction, the oval tube (31) at the innermost layer is connected to the inner tube portion (1) with the inner wall at both ends of the minor axis thereof, and the oval tube (31) at the outermost layer is connected to the outer tube portion (2) with the outer wall at both ends of the major axis thereof;

in the two adjacent layers of the elliptical tubes (31), the inner walls of the two ends of the short axis of the elliptical tube (31) positioned at the outer layer are connected with the outer walls of the two ends of the short axis of the elliptical tube (31) positioned at the inner layer.

5. The tube material for directional reinforcement according to claim 3, wherein the major axes of the oval tubes (31) are arranged in the same direction, the oval tube (31) at the innermost layer is connected to the inner tube portion (1) with the inner wall at one end of the major axis, the oval tube (31) at the outermost layer is connected to the outer tube portion (2) with the outer wall at one end of the major axis, and the oval tubes (31) at two adjacent layers are connected with each other at the end of the major axis.

6. The tube material for directional reinforcement according to claim 3, wherein the long axes of the elliptical tubes (31) of two adjacent layers are perpendicular to each other, the elliptical tube (31) of the innermost layer is connected to the inner tube portion (1) with the inner wall at both ends of the short axis thereof, and the elliptical tube (31) of the outermost layer is connected to the outer tube portion (2) with the outer wall at both ends of the long axis thereof;

in the two adjacent layers of the elliptical tubes (31), the inner walls of the two ends of the short axis of the elliptical tube (31) positioned at the outer layer are connected with the outer walls of the two ends of the long axis of the elliptical tube (31) positioned at the inner layer.

7. The directionally reinforced pipe as claimed in claim 1, wherein the transition connecting pipe portion (3) comprises a transition pipe (32) and more than two elliptical pipes (31), each elliptical pipe (31) is sleeved with each other, and two adjacent layers of elliptical pipes (31) are connected through the transition pipe (32).

8. A directionally reinforced pipe according to any of claims 1 to 7, characterized in that the gap between the inner pipe section (1) and the transition pipe section (3) and/or the gap between the outer pipe section (2) and the transition pipe section (3) and/or the gap inside the transition pipe section (3) is provided with a filling material.

9. A method of processing directionally reinforced pipe, suitable for use as directionally reinforced pipe as claimed in any one of claims 1 to 8, the method comprising:

step S1, configuring an internal mold (A);

a step S2 of winding the inner mold (A) with prepreg to form the inner tube section (1);

a step S3 of arranging a transition mold (B) outside the inner pipe part (1) according to the cross-sectional shape of the transition connection pipe part (3) and winding the prepreg around the transition mold (B) to form the transition connection pipe part (3);

a step S4 of disposing an outer die (C) outside the transition connecting pipe part (3);

a step S5 of winding the outer tube (2) around the outer die (C) using a prepreg;

when the transition connecting pipe part (3) comprises a plurality of sleeved branch pipes, the transition die (B) comprises a plurality of branch dies (B1), each branch die (B1) is configured for multiple times, and the prepreg is sequentially wound around each branch die (B1) to form each branch pipe of the transition connecting pipe part (3).

10. The method of claim 9, wherein the prepreg is wound without being separated in the steps S2, S3 and S5.

Technical Field

The invention relates to the technical field of pipe preparation, in particular to a directional reinforced pipe and a preparation method thereof.

Background

At present, most of radial performances of conventional pipes are isotropic, that is, the pipes have the same or basically the same characteristics of rigidity, strength and the like in the circumferential direction, but in some specific occasions, the pipes are often required to have higher rigidity and strength in a certain radial direction (main bearing direction), and at the moment, if the isotropic pipes are adopted, the waste of rigidity and strength in a non-main bearing direction is inevitably caused, and the lightweight design of products is not facilitated.

Therefore, how to provide a solution to overcome the above-mentioned drawbacks remains a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a directionally reinforced pipe and a preparation method thereof, wherein the pipe can be reinforced in a set direction so as to avoid waste of strength and rigidity of the pipe in a non-main bearing direction and facilitate lightweight design of products.

In order to solve the technical problem, the invention provides a directional reinforced pipe, which comprises an inner pipe part, an outer pipe part and a transitional connecting pipe part, wherein the inner pipe part, the outer pipe part and the transitional connecting pipe part are sleeved with each other, and the transitional connecting pipe part is used for connecting the outer wall of the inner pipe part and the inner wall of the outer pipe part so as to reinforce the pipe in a set direction.

Compared with the traditional isotropic pipe, the transitional connecting pipe part is arranged between the inner pipe part and the outer pipe part of the pipe provided by the invention, and the pipe can be reinforced in the set direction, so that the strength and rigidity of the pipe in the set direction can be higher than those in other directions, therefore, when the pipe is used in an occasion with higher strength and rigidity requirements in a single direction (main bearing direction), the waste of the strength and rigidity of the pipe in a non-main bearing direction can be avoided, and the light weight level of a product can be improved to a greater extent, so that the development requirement of light weight at present can be met.

Optionally, the transition connecting tube portion comprises an elliptical tube, and the elliptical tube is sleeved outside the inner tube portion; the inner walls of the two ends of the short axis of the elliptical tube are connected with the inner tube part, and the outer walls of the two ends of the long axis of the elliptical tube are connected with the outer tube part; or the inner wall of one end of the long shaft of the oval tube is connected with the inner tube part, and the outer wall of the other end of the long shaft of the oval tube is connected with the outer tube part.

Optionally, the transition connection pipe portion includes more than two oval pipes, each the oval pipe cup joints each other, and the inlayer the oval pipe overcoat in interior pipe portion, the transition connection pipe portion with inlayer the inner wall of oval pipe with interior pipe portion links to each other, and with outermost the outer wall of oval pipe with outer pipe portion links to each other, and adjacent two-layer the oval pipe links to each other.

Optionally, the major axes of the elliptical tubes are arranged in the same direction, the inner wall of the innermost elliptical tube at both ends of the minor axis is connected with the inner tube part, and the outer wall of the outermost elliptical tube at both ends of the major axis is connected with the outer tube part; in the two adjacent layers of the elliptical tubes, the inner walls of the two ends of the short shaft of the elliptical tube positioned on the outer layer are connected with the outer walls of the two ends of the short shaft of the elliptical tube positioned on the inner layer.

Optionally, the major axes of the elliptical tubes are arranged in the same direction, the inner wall of one end of the major axis of the innermost elliptical tube is connected with the inner tube part, the outer wall of one end of the major axis of the outermost elliptical tube is connected with the outer tube part, and the ends of the major axes of the two adjacent elliptical tubes are connected.

Optionally, the major axes of two adjacent layers of the elliptical tubes are perpendicular to each other, the inner wall of the innermost layer of the elliptical tubes at two ends of the minor axis is connected with the inner tube part, and the outer wall of the outermost layer of the elliptical tubes at two ends of the major axis is connected with the outer tube part; in the two adjacent layers of the elliptical tubes, the inner walls of the two ends of the short axis of the elliptical tube positioned at the outer layer are connected with the outer walls of the two ends of the long axis of the elliptical tube positioned at the inner layer.

Optionally, the transition connection pipe portion comprises a transition pipe and more than two elliptical pipes, each elliptical pipe is sleeved with the other elliptical pipe, the innermost elliptical pipe is connected with the inner pipe portion through inner walls at two ends of a short shaft of the innermost elliptical pipe, the outermost elliptical pipe is connected with the outer pipe portion through outer walls at two ends of a long shaft of the outermost elliptical pipe, and the adjacent two elliptical pipes are connected through the transition pipe.

Optionally, a gap between the inner tubular portion and the transition connecting tubular portion and/or a gap between the outer tubular portion and the transition connecting tubular portion and/or a gap in the transition connecting tubular portion is provided with a filling material.

The invention also provides a processing method of the directionally reinforced pipe, which is suitable for the directionally reinforced pipe and comprises the following steps: step S1, configuring an internal mold; a step S2 of winding the inner mold around the inner mold using a prepreg to form the inner tube portion; step S3, arranging a transition die on the outer side of the inner pipe part according to the cross-sectional shape of the transition connecting pipe part, and winding the prepreg around the transition die to form the transition connecting pipe part; step S4, disposing an outer mold outside the transition connecting pipe portion; a step S5 of winding the outer tube part around the outer mold using a prepreg; when the transition connecting pipe part comprises a plurality of sleeved branch pipes, the transition die comprises a plurality of branch dies, each branch die is configured for multiple times, and the prepreg is sequentially wound around each branch die to form each branch pipe of the transition connecting pipe part.

Alternatively, in each of the step S2, the step S3, and the step S5, the prepreg is wound without being cut.

Drawings

FIG. 1 is a cross-sectional view of a first embodiment of a directionally reinforced pipe provided by the present invention;

FIG. 2 is a cross-sectional view of a second embodiment of the directionally reinforced tubing provided in the present invention;

FIG. 3 is a cross-sectional view of a third embodiment of the directionally reinforced tubing provided in the present invention;

FIG. 4 is a cross-sectional view of a fourth embodiment of the directionally reinforced tubing provided in the present invention;

FIG. 5 is a cross-sectional view of a fifth embodiment of the directionally reinforced tubing provided in the present invention;

FIG. 6 is a cross-sectional view of a sixth embodiment of a directionally reinforced pipe provided by the present invention;

FIG. 7 is a cross-sectional view of a seventh embodiment of the directionally reinforced tubing provided in the present invention;

FIG. 8 is a cross-sectional view of an eighth embodiment of the directionally reinforced tubing provided in the present invention;

FIG. 9 is a flow chart of a method of making a directionally reinforced pipe provided by the present invention.

The reference numerals in fig. 1-9 are illustrated as follows:

1 an inner tube part;

2 an outer tube part;

3, transition connecting pipe parts, 31 elliptical pipes and 32 transition pipes;

an internal mold A, a transition mold B, a split mold B1 and an external mold C.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Example one

Referring to fig. 1-8, fig. 1 is a cross-sectional view of a first embodiment of the directionally reinforced pipe provided by the present invention, figure 2 is a cross-sectional view of a second embodiment of the directionally reinforced tubing provided in the present invention, figure 3 is a cross-sectional view of a third embodiment of the directionally reinforced tubing provided in the present invention, figure 4 is a cross-sectional view of a fourth embodiment of the directionally reinforced tubing provided in the present invention, figure 5 is a cross-sectional view of a fifth embodiment of the directionally reinforced tubing provided in the present invention, figure 6 is a cross-sectional view of a sixth embodiment of the directionally reinforced tubing provided in the present invention, figure 7 is a cross-sectional view of a seventh embodiment of the directionally reinforced tubing provided by the present invention, FIG. 8 is a cross-sectional view of an eighth embodiment of the directionally reinforced tubing provided in the present invention.

As shown in fig. 1-8, the present invention provides a directional reinforced pipe, which comprises an inner pipe portion 1, an outer pipe portion 2 and a transition connecting pipe portion 3, wherein the inner pipe portion 1, the outer pipe portion 2 and the transition connecting pipe portion 3 are sleeved with each other, and the transition connecting pipe portion 3 is used for connecting the outer wall of the inner pipe portion 1 and the inner wall of the outer pipe portion 2 to reinforce the pipe in a set direction.

Compared with the traditional isotropic pipe, the transitional connecting pipe part 3 is arranged between the inner pipe part 1 and the outer pipe part 2 of the pipe provided by the invention, and the pipe can be reinforced in the set direction, so that the strength and rigidity of the pipe in the set direction can be higher than those in other directions, therefore, when the pipe is used in occasions with higher strength and rigidity requirements in one direction (main bearing direction), the waste of the strength and rigidity of the pipe in the non-main bearing direction can be avoided, and the light weight level of the product can be improved to a greater extent, so that the development requirement of light weight at present can be met.

Here, the embodiment of the present invention does not limit what kind of the occasion with the large requirements on the unidirectional strength and the stiffness specifically means, in other words, the embodiment of the present invention does not limit the application scenario of the pipe; for example, for the wing main beam of the unmanned aerial vehicle, the bending resistance requirement of the wing main beam in the direction perpendicular to the airfoil surface is higher than that of the wing main beam along the course, and for the application scene, the directional reinforced pipe provided by the invention can well meet the bending resistance requirement of the wing main beam in the direction perpendicular to the airfoil surface, and the weight of the main beam can be greatly reduced to meet the design requirement of light weight, so that the method has positive significance for reducing load, prolonging endurance and the like.

The set direction may be a single direction or a plurality of directions, and in the case of a plurality of directions, the set direction may be determined in accordance with an actual application scenario, such that the entire region formed by combining the plurality of directions is reinforced, or the plurality of directions independent from each other are reinforced.

The following embodiments of the present invention will describe the structure of the directionally reinforced pipe provided by the present invention with reference to several specific embodiments, wherein the reinforced position of the pipe can refer to the pipe wall pointed by the arrow in the drawings.

As shown in fig. 1, the transition connecting pipe portion 3 may include only one oval pipe 31, the oval pipe 31 may be sleeved on the inner pipe portion 1, the oval pipe 31 may be connected to the inner pipe portion 1 through the inner walls at the two ends of the short axis and connected to the outer pipe portion 2 through the outer walls at the two ends of the long axis, and in this case, the pipe wall of the oval pipe 31 in the direction of the long axis may be reinforced.

Referring to fig. 2, and fig. 2 is a modification of fig. 1, the elliptical tube 31 may have an inner wall at one end of its major axis connected to the inner tube portion 1 and an outer wall at the other end of its major axis connected to the outer tube portion 2, and at this time, the tube wall at one side of the tube may be reinforced.

Except for the scheme that only one elliptical tube 31 exists, the transition connecting tube portion 3 can also adopt the scheme that comprises more than two elliptical tubes 31, at the moment, the elliptical tubes 31 can be mutually sleeved, the innermost elliptical tube 31 can be sleeved on the inner tube portion 1, the transition connecting tube portion 3 can be connected with the inner tube portion 1 through the inner wall of the innermost elliptical tube 31 and connected with the outer tube portion 2 through the outer wall of the outermost elliptical tube 31, and the two adjacent elliptical tubes 31 can be connected. Compare in an oval pipe 31's scheme, a plurality of oval pipe 31's scheme is more applicable to the situation that the pipe wall is relatively thick, because the pipe wall is thick, carries out progressively stack through a plurality of oval pipe 31 of size crescent, can improve the local anti unstability performance of tubular product, simultaneously, also can guarantee the reinforcing effect to tubular product.

In one embodiment, as shown in fig. 3, the major axes of the respective oval tubes 31 may be arranged in the same direction, the innermost oval tube 31 may be connected to the inner tube portion 1 with the inner walls at both ends of the minor axis thereof, and the outermost oval tube 31 may be connected to the outer tube portion 2 with the outer walls at both ends of the major axis thereof; in the two adjacent layers of the elliptical tubes 31, the inner walls at the two ends of the short axis of the elliptical tube 31 positioned at the outer layer can be connected with the outer walls at the two ends of the short axis of the elliptical tube 31 positioned at the inner layer, and at this time, the reinforcing positions of the tube are still the two side walls in the direction of the long axis of the elliptical tube 31.

In another embodiment, the major axes of the oval tubes 31 may be arranged in the same direction, the innermost oval tube 31 is connected to the inner tube 1 at the inner wall of one end of the major axis, the outermost oval tube 31 is connected to the outer tube 2 at the outer wall of one end of the major axis, and the two adjacent oval tubes 31 may be connected to each other at the end of the major axis.

Such an embodiment may again include the following two cases: first, as shown in fig. 4, the elliptical tubes 31 are connected to the inner tube portion 1 at the same end (lower end in the drawing) of the major axis, the other ends (upper end in the drawing) of the major axis of the elliptical tubes 31 are not connected to each other, and the outer wall of the other end (upper end in the drawing) of the major axis of the outermost elliptical tube 31 may be connected to the outer tube portion 2; second, the oval tubes 31 may be connected to the inner and outer tubes or tube portions at both ends of the major axis thereof, respectively, and taking the case of the two oval tubes 31 shown in fig. 5 as an example, the innermost oval tube 31 may be connected to the inner tube portion 1 at the lower end of the major axis thereof and to the outermost oval tube 31 at the upper end of the major axis thereof, and the outermost oval tube 31 may be connected to the outer tube portion 2 at the lower end of the major axis thereof.

In another embodiment, the major axes of two adjacent layers of the oval tubes 31 may be perpendicular to each other, the innermost layer of the oval tubes 31 may be connected to the inner tube part 1 with the inner walls at both ends of the minor axis thereof, and the outermost layer of the oval tubes 31 may be connected to the outer tube part 2 with the outer walls at both ends of the major axis thereof; in the two adjacent layers of the oval tubes 31, the oval tube 31 positioned at the outer layer can be connected with the inner wall at the two ends of the short axis and the outer wall at the two ends of the long axis of the oval tube 31 positioned at the inner layer. With this embodiment, the main reinforcing positions of the pipe are two side walls in the long axis direction of the outermost oval tube 31.

Further, as shown in fig. 7 and 8, the transition connecting pipe portion 3 may further include a transition pipe 32 and two or more elliptical pipes 31, the elliptical pipes 31 may be sleeved with each other, the innermost elliptical pipe 31 may be connected to the inner pipe portion 1, the outermost elliptical pipe 31 may be connected to the outer pipe portion 2, the transition pipe 32 may be disposed between two adjacent elliptical pipes 31, and each two adjacent elliptical pipe 31 is connected to the transition pipe 32 therebetween. With the structure, through the arrangement of the transition pipe 32, the pipe wall between the inner pipe part 1 and the outer pipe part 2 is actually designed in a layered manner, and then the elliptical pipes 31 are respectively arranged in the layers between the transition pipe 32 and the inner pipe part 1 and between the transition pipe 32 and the outer pipe part 2 (if a plurality of sleeved transition pipes 32 exist, the layers can also comprise the space between two adjacent transition pipes 32) for reinforcement.

In the above-mentioned solution including the transition pipe 32, the connection structure of the elliptical pipe 31 and the transition pipe 32, the inner pipe portion 1, and the outer pipe portion 2 may be designed with reference to the foregoing description in which only the elliptical pipe 31 exists, and a repetitive description will not be made here.

It should be noted that the above description of the structural form of the transition connecting pipe portion 3 is only an exemplary illustration of the embodiment of the present invention, and cannot be taken as a limitation of the implementation range of the directionally reinforced pipe provided by the present invention, and in practical applications, the structural form of the transition connecting pipe portion 3 may be varied as long as it is ensured that there is a connection between the pipes (if a plurality of pipes are included) of the transition connecting pipe portion 3, and that there is also a connection between the transition connecting pipe portion 3 and the inner pipe portion 1 and the outer pipe portion 2, and that the strength and rigidity of the pipe in the set direction can be reinforced.

In the embodiment of the present invention, the cross-sectional shapes of the inner pipe portion 1, the outer pipe portion 2, and the transition pipe 32 are not limited, and in the embodiment of the drawings, the cross-sectional shapes of the inner pipe portion 1, the outer pipe portion 2, and the transition pipe 32 are all circular, and may be square or other shapes in practice; in the above-described embodiments, the elliptical tube 31 as the core member of the transition connecting tube portion 3 is merely a specific example that can produce the directional reinforcing effect, and other reinforcing tube structures similar to the elliptical tube 31, such as a tube having a cross-sectional shape of a waist circle, a strip, a drum, or the like, may be used.

Further, the gap between the inner pipe portion 1 and the transition connecting pipe portion 3 and/or the gap between the outer pipe portion 2 and the transition connecting pipe portion 3 and/or the gap in the transition connecting pipe portion 3 (when a plurality of pipes are present, the gap in the transition connecting pipe portion 3 is generated), may be provided with a filling material, which may be specifically a rigid foam, a space net frame formed by 3D printing, or the like, to fill the gap, and thus, the local buckling resistance of the pipe may be improved.

The directional reinforced pipe can be formed by winding prepreg in a non-breaking mode at one time, so that the formed pipe has higher integration degree, the number of parts of a structural system can be reduced, the manufacturing period can be greatly shortened, and the manufacturing cost is reduced.

Example two

Referring to fig. 9, fig. 9 is a flow chart of a method for manufacturing a directionally reinforced pipe according to the present invention.

As shown in fig. 9, the present invention also provides a method for processing a directionally reinforced pipe, which is applied to the directionally reinforced pipe according to the first embodiment of the present invention, and the method includes:

step S1, configuring an internal model A;

the inner die A is a detachable die, the outer surface of the inner die A can be coated with a release agent, and the cross section shape of the inner die A can be set according to the cross section shape requirement of the inner pipe part 1.

Step S2, winding the inner mold a with prepreg to form the inner tube portion 1;

the prepreg may be a carbon fiber prepreg, and multiple layers of prepregs may be wound on the outer side of the inner mold a to form the inner pipe portion 1 with a set thickness, where the specific value of the set thickness is not limited herein, and in practical applications, a person skilled in the art may set the thickness according to actual requirements.

A step S3 of configuring a transition die B outside the inner pipe part 1 according to the cross-sectional shape of the transition connection pipe part 3 and winding the prepreg around the transition die B to form the transition connection pipe part 3;

the transitional mold B may be a removable mold, in which case its outer surface may be coated with a release agent, or a non-removable mold, in which case the transitional mold B may exist as a filling material.

Referring to fig. 3, the transition connecting pipe portion 3 may actually include a plurality of sleeved branch pipes, in which case, each branch pipe is formed separately, and accordingly, the transition mold B may also include a plurality of branch molds B1, and in particular, in production, an inner layer branch mold B1 may be disposed on the outer side of the inner pipe portion 1, and prepreg may be wound around the inner layer branch mold B1 to form the inner layer oval pipe 31, and then, an outer layer branch mold B1 may be disposed on the outer side of the inner layer oval pipe 31, and prepreg may be wound around the outer layer branch mold B1 to form the outer layer oval pipe 31. The thickness of the partial pipes involved in the transition joint pipe section 3 is not limited here either.

Step S4, disposing an outer mold C outside the transition connection pipe portion 3;

likewise, the outer mold C may be a removable mold, in which case its outer surface may be coated with a release agent, or a non-removable mold, in which case the outer mold C may be present as a filler material.

In step S5, the prepreg is wound around the outer mold C to form the outer tube 2, and then the composite material tube is cured with resin to obtain a final tube, wherein the curing method may be thermal curing or the like.

By adopting the method, the directionally reinforced pipe in the first embodiment can be formed, and the technical effect of the directionally reinforced pipe can be referred to the first embodiment, and will not be described repeatedly.

In step S2, step S3 and step S5, the prepreg can be wound without breaking, so that the tube with directional reinforcement provided by the invention is formed by one-step winding, the integration degree is higher, the number of parts of a structural system can be reduced, the manufacturing period can be greatly shortened, and the manufacturing cost can be reduced.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.