Connecting structure and connecting method of pultrusion reinforced FRP (fiber reinforced Plastic) pipe
阅读说明：本技术 一种拉挤加筋frp管的连接结构及连接方法 (Connecting structure and connecting method of pultrusion reinforced FRP (fiber reinforced Plastic) pipe ) 是由 李峰 张冬冬 陈岩 郑宇宙 于 2019-11-15 设计创作，主要内容包括：本发明公开了一种拉挤加筋FRP管的连接结构及连接方法,属于复合材料连接技术领域,该拉挤加筋FRP管的连接结构包括FRP管和法兰盘,所述FRP管的内壁上设置有至少两条加筋,每条所述加筋均包括圆柱加筋部和支撑部,所述圆柱加筋部的至少一端具有伸出所述支撑部的连接段；所述法兰盘包括圆筒部、法兰部和连接部,所述连接部上设置有第一通孔；所述法兰盘的所述连接部与所述加筋的所述支撑部的端面相抵靠,每所述圆柱加筋部的所述连接段均穿过相应的所述第一通孔,所述连接段的穿出端上均设置有锁紧件。该拉挤加筋FRP管的连接方法采用上述拉挤加筋FRP管的连接结构。本发明结构简单,连接可靠,而且提高了FRP管的承载能力。(The invention discloses a connecting structure and a connecting method of a pultrusion reinforced FRP pipe, belonging to the technical field of composite material connection, wherein the connecting structure of the pultrusion reinforced FRP pipe comprises an FRP pipe and a flange plate, the inner wall of the FRP pipe is provided with at least two reinforcements, each reinforcement comprises a cylindrical reinforcement part and a supporting part, and at least one end of the cylindrical reinforcement part is provided with a connecting section extending out of the supporting part; the flange plate comprises a cylindrical part, a flange part and a connecting part, and a first through hole is formed in the connecting part; the ring flange the connecting portion with the muscle the terminal surface of supporting part offsets and leans on, every the cylinder adds muscle portion the linkage segment all passes correspondingly first through-hole, wearing out of linkage segment is served and all is provided with the retaining member. The connecting method of the pultrusion reinforced FRP pipe adopts the connecting structure of the pultrusion reinforced FRP pipe. The invention has simple structure and reliable connection, and improves the bearing capacity of the FRP pipe.)
1. A connecting structure of a pultrusion reinforced FRP pipe comprises an FRP pipe and a flange plate, and is characterized in that at least two reinforcements are arranged on the inner wall of the FRP pipe, each reinforcement comprises a cylindrical reinforcement part and a supporting part arranged between the inner wall of the FRP pipe and the cylindrical reinforcement part, the axial length of the cylindrical reinforcement part is greater than that of the supporting part, and at least one end of the cylindrical reinforcement part is provided with a connecting section extending out of the supporting part;
the flange plate comprises a cylindrical part matched with an inner hole at the end part of the FRP pipe, a flange part which is positioned at one end of the cylindrical part and protrudes outwards, and a connecting part positioned in the other end of the cylindrical part, wherein a first through hole corresponding to the cylindrical reinforcement part is arranged on the connecting part;
the ring flange the connecting portion with the muscle the terminal surface of supporting part offsets and leans on, every the cylinder adds muscle portion the linkage segment all passes correspondingly first through-hole, wearing out of linkage segment is served and all is provided with the retaining member.
2. The structure for connecting pultruded reinforced FRP tubes according to claim 1, wherein the flange further comprises an annular portion located outside the cylindrical portion and concentrically disposed with the cylindrical portion, the annular portion fitting to an outer periphery of the end of the FRP tube.
3. The connecting structure of the pultruded reinforced FRP pipe according to claim 1, wherein the locking member comprises an anchor ring and at least two clamping pieces, the anchor ring has a tapered inner hole, the outer surfaces of the clamping pieces are matched with the shape of the inner hole of the anchor ring, and all the clamping pieces surround to form an inner cavity for matching with the connecting section of the cylindrical reinforced portion.
4. The connecting structure of the pultruded reinforced FRP pipe according to claim 1, 2 or 3, wherein the reinforcement and the FRP pipe are integrally formed by a pultrusion process.
5. The connecting structure of the pultruded reinforced FRP tube according to claim 1, wherein the flange has a plurality of second through holes formed therein.
6. The connecting structure of the pultruded reinforced FRP tube according to claim 1, wherein the flange is a metal flange.
7. The connecting structure of a pultruded reinforced FRP tube according to claim 1, wherein both ends of the cylindrical reinforcement portion have the connecting sections protruding out of the supporting portion; the flange plates are arranged at two ends of the FRP pipe.
8. The connecting structure of a pultruded reinforced FRP tube according to claim 1, wherein a weight-reduction hole is provided in a middle portion of the connecting portion.
9. A connecting method of a pultruded reinforced FRP pipe, characterized in that the connecting structure of a pultruded reinforced FRP pipe according to any one of claims 1 to 8 is adopted, comprising the steps of:
integrally molding the FRP pipe and the reinforcement by a pultrusion process, and then cutting off at least one end of the reinforcement positioned on the supporting part to enable at least one end of the cylindrical reinforcement part to be provided with a connecting section extending out of the supporting part;
assembling the flange plate to enable the cylindrical part of the flange plate to be matched with the inner hole at the end part of the FRP pipe, enabling the connecting part of the flange plate to be abutted against the end face of the reinforced supporting part, enabling the connecting section of each cylindrical reinforced part to penetrate through the corresponding first through hole, and then arranging the locking part at the penetrating end of the connecting section.
Technical Field
The invention belongs to the technical field of composite material connection, and particularly relates to a connecting structure and a connecting method of a pultrusion reinforced FRP pipe.
Background
Fiber Reinforced composite (FRP) is a composite formed by winding, molding or pultrusion a reinforcing Fiber material, such as glass Fiber, carbon Fiber, aramid Fiber, etc., with a matrix material. The composite material is gradually widely applied in the engineering field due to the advantages of light weight, high strength, corrosion resistance and the like.
At present, the FRP pipe is connected by bonding a metal joint at two ends of a pipe body and then connecting the metal joint with other FRP pipes or parts. However, the adhesive force between the FRP pipe and the metal joint is in direct proportion to the adhesive length within a certain range, and after the adhesive force exceeds the critical length, the adhesive force is not increased along with the increase of the adhesive length, so that the bearing capacity of the FRP pipe is limited, and the adhesive joint has obvious aging problems.
Therefore, in the technical field of composite material connection, there is still a need for research and improvement on the connection structure of FRP pipes, which is also a research focus and emphasis in the technical field of composite material connection at present and is the starting point for the completion of the present invention.
Disclosure of Invention
Therefore, the first technical problem to be solved by the invention is as follows: the connecting structure of the pultrusion reinforced FRP pipe is simple in structure and reliable in connection, and bearing capacity of the FRP pipe can be improved.
As a technical concept, the second technical problem to be solved by the present invention is: provides a connecting method of a pultrusion reinforced FRP pipe.
In order to solve the first technical problem, the technical scheme of the invention is as follows: a connecting structure of a pultrusion reinforced FRP pipe comprises an FRP pipe and a flange plate, wherein at least two reinforcements are arranged on the inner wall of the FRP pipe, each reinforcement comprises a cylindrical reinforcement part and a supporting part arranged between the inner wall of the FRP pipe and the cylindrical reinforcement part, the axial length of the cylindrical reinforcement part is greater than that of the supporting part, and at least one end of the cylindrical reinforcement part is provided with a connecting section extending out of the supporting part;
the flange plate comprises a cylindrical part matched with an inner hole at the end part of the FRP pipe, a flange part which is positioned at one end of the cylindrical part and protrudes outwards, and a connecting part positioned in the other end of the cylindrical part, wherein a first through hole corresponding to the cylindrical reinforcement part is arranged on the connecting part;
the ring flange the connecting portion with the muscle the terminal surface of supporting part offsets and leans on, every the cylinder adds muscle portion the linkage segment all passes correspondingly first through-hole, wearing out of linkage segment is served and all is provided with the retaining member.
As an improvement, the flange further includes an annular portion located outside the cylindrical portion and disposed concentrically with the cylindrical portion, the annular portion being fitted to an outer periphery of the end portion of the FRP pipe.
As an improvement, the retaining member includes anchor ring and two piece at least clamping pieces, the anchor ring has the toper hole, the surface of clamping piece with anchor ring hole shape looks adaptation, all the clamping piece encloses to close and forms be used for with the connecting segment complex inner chamber of cylinder reinforcement portion.
As an improvement, the reinforced rib and the FRP pipe are integrally formed through a pultrusion process.
As an improvement, a plurality of second through holes are formed in the flange part of the flange plate.
As an improvement, the flange plate is a metal flange.
As an improvement, both ends of the cylindrical reinforcing part are provided with the connecting sections extending out of the supporting parts; the flange plates are arranged at two ends of the FRP pipe.
As an improvement, the middle part of the connecting part is provided with a lightening hole.
In order to solve the second technical problem, the technical solution of the present invention is: a connecting method of a pultrusion reinforced FRP pipe adopts the connecting structure of the pultrusion reinforced FRP pipe, and comprises the following steps:
integrally molding the FRP pipe and the reinforcement by a pultrusion process, and then cutting off at least one end of the reinforcement positioned on the supporting part to enable at least one end of the cylindrical reinforcement part to be provided with a connecting section extending out of the supporting part;
assembling the flange plate to enable the cylindrical part of the flange plate to be matched with the inner hole at the end part of the FRP pipe, enabling the connecting part of the flange plate to be abutted against the end face of the reinforced supporting part, enabling the connecting section of each cylindrical reinforced part to penetrate through the corresponding first through hole, and then arranging the locking part at the penetrating end of the connecting section.
After the technical scheme is adopted, the invention has the beneficial effects that:
according to the connecting structure and the connecting method of the pultrusion reinforced FRP pipe, the reinforcement is designed in the FRP pipe, and the flange plate and the locking piece are designed, so that when the connecting structure is used, the flange plate is assembled at the end part of the FRP pipe, the cylindrical part of the flange plate is matched with the inner hole at the end part of the FRP pipe, the connecting part of the flange plate is abutted against the end surface of the supporting part of the reinforcement, the connecting section of each cylindrical reinforcement part penetrates through the corresponding first through hole, then the locking piece is arranged at the penetrating end of the connecting section, so that the FRP pipe and the flange plate are connected together, and when the two FRP pipes are connected, the flange plate is connected at the end part of each FRP pipe, and then the two flange plates are connected together, so that the connection of the FRP pipes can be realized; the effect of ring flange bears the pressure-bearing behind two FRP union couplings, and the retaining member is fixed the muscle of FRP pipe on the ring flange, just so can bear the pulling force. Compared with the cementing in the prior art, the quantity of the reinforced rib and the locking piece can be calculated through mechanics as required, so that the bearing capacity of the FRP pipe is improved. The connecting structure and the connecting method of the FRP pipe provided by the invention have the advantages that the FRP pipe cannot be damaged, the structure is simple, the connection is reliable, and the bearing capacity of the FRP pipe is improved.
Because the flange plate also comprises the annular part positioned outside the cylindrical part, and the annular part is matched with the periphery of the end part of the FRP pipe, the annular part and the cylindrical part can form an annular groove, so that the end part of the FRP pipe is positioned in the annular groove, and the function of protecting the FRP pipe is achieved.
Because the retaining member includes anchor ring and two piece at least clamping pieces, the anchor ring has the toper hole, the surface of clamping piece with anchor ring hole shape looks adaptation, all the clamping piece encloses to close and forms be used for with the linkage segment complex inner chamber of cylinder stiffened portion, can put the anchor ring on the end of wearing out of linkage segment earlier like this, then packs in all clamping pieces between the end of wearing out of anchor ring and linkage segment, along with the wedging of clamping piece, the end of wearing out of linkage segment is held tightly to the inner chamber of clamping piece, realizes the reinforcement anchor with the FRP pipe on the ring flange, easy operation, the anchor is reliable.
Because the flange part of the flange plate is provided with the plurality of second through holes, the flange plate can be connected through fasteners such as bolts, nuts and the like.
Because the weight-reducing hole is arranged in the middle of the connecting part, the weight of the flange plate can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.
FIG. 1 is a schematic structural diagram of a connection structure of a pultruded reinforced FRP pipe according to an embodiment of the present invention;
FIG. 2 is a perspective view of FIG. 1;
FIG. 3 is an enlarged sectional view taken along line A-A of FIG. 1;
the exploded view of fig. 1 of fig. 4;
FIG. 5a is a schematic structural view of a pultruded reinforced FRP pipe;
FIG. 5B is a cross-sectional view B-B of FIG. 5 a;
FIG. 5c is a perspective view of FIG. 5 a;
FIG. 6a is a schematic view of the flange configuration;
FIG. 6b is a cross-sectional view C-C of FIG. 6 a;
FIG. 6c is a perspective view of FIG. 6 a;
FIG. 6d is a perspective view of FIG. 6a from another perspective;
FIG. 7a is a schematic structural view of an anchor ring;
FIG. 7b is a cross-sectional view D-D of FIG. 7 a;
FIG. 8 is a perspective view of the clip;
FIG. 9 is a schematic structural view showing a state where two pultruded reinforced FRP pipes are connected;
in the figure: 1-FRP pipe, 11-reinforcement, 111-cylindrical reinforcement part, 1111-connecting section, 112-supporting part, 2-flange plate, 21-cylindrical part, 22-flange part, 221-second through hole, 23-connecting part, 231-first through hole, 232-lightening hole, 24-annular part, 3-locking part, 31-anchor ring, 32-clamping piece, 4-bolt and 5-nut.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present specification, the terms "front", "rear", "left", "right", "inner", "outer" and "middle" are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship between the terms and the corresponding parts are also regarded as the scope of the present invention without substantial changes in the technical contents.
As shown in fig. 1 to 4, a connecting structure of a pultrusion reinforced FRP pipe includes an FRP pipe 1 and a
As shown in fig. 5 a-5 c, three
As shown in fig. 3 and fig. 6a to 6d, the
As shown in fig. 3, the connecting
In the present embodiment, as shown in fig. 3, 4, 7a, 7b and 8, the locking
When in use, the flange plate 2 is assembled at the end part of the FRP pipe 1, the cylinder part 21 of the flange plate 2 is matched with the inner hole at the end part of the FRP pipe 1, the annular part 24 is matched with the periphery of the end part of the FRP pipe 1, the connecting part 23 of the flange plate 2 is abutted against the end surface of the supporting part 112 of the reinforcement 11, the connecting section 1111 of each cylindrical reinforcement part 111 passes through the corresponding first through hole 231, then the penetrating end of the connecting section 1111 is sleeved with the anchor ring 31, then all the clamping pieces 32 are plugged between the anchor ring 31 and the penetrating end of the connecting section 1111, along with the wedging of the clamping pieces 32, the inner cavity of the clamping piece 32 tightly holds the penetrating end of the connecting section 1111, the reinforcement 11 of the FRP pipe 1 is anchored on the flange plate 2, the operation is simple, the anchoring is reliable, so that the FRP pipe 1 and the flange plate 2 are connected together, when two FRP pipes 2 are connected, as shown in fig. 9, the end part, then connecting the two corresponding flange plates together, thus realizing the connection of the FRP pipe; the flange plate 2 is used for bearing the pressure of the two FRP pipes 1 after being connected, and the locking piece 3 fixes the reinforcement 11 of the FRP pipes 1 on the flange plate 2, so that the tension can be borne. Compared with the cementing in the prior art, the number of the reinforced
In order to realize the connection between the flange plates, as shown in fig. 6c, six second through
The embodiment of the invention also discloses a method for connecting the pultrusion reinforced FRP pipe, which adopts the connection structure of the pultrusion reinforced FRP pipe and comprises the following steps:
the FRP pipe 1 and the
In summary, the connection structure and the connection method of the FRP pipe provided by the embodiment of the invention do not damage the FRP pipe, have simple structure and reliable connection, and improve the bearing capacity of the FRP pipe.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
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