A composite material pultruded profile having an a-shaped cross-section

Abstract

The application provides an A-shaped cross-section composite material pultruded section bar, and belongs to the section bar structure field.The problem of low bearing capacity of the existing connecting section bar is solved.The section bar is an integrated structure, comprising a left arm, a right arm and a cross arm, the left arm and the right arm are connected at the upper end to form an included angle, the left arm and the right arm are connected through the cross arm, the left arm, the right arm and the cross arm are connected to form an A-shaped cross section, the section bar is made of composite material, the composite material is composed of reinforcing fibers and matrix material, and the section bar is pultruded along the vertical direction of the A-shaped cross section.It is mainly used for the main beam structure of the communication pole tower, the power pole tower or other composite material polygonal pole tower forms.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of profile structure, in particular to an A-shaped cross-section composite pultruded profile. BACKGROUND

[0002] Composite material connecting technology is one of the difficulties that perplex the application of composite materials. The application of composite material to tower structure can solve the problems of poor weather resistance, poor designability, and reduction of self weight. The main beam of the existing composite material tower structure is in the form of rectangular, circular, I-shaped cross-section, and the connection between the main beams and the connecting pieces between the main beams and the supporting rods are all metal connecting pieces, which increases the self weight and maintenance cost of the tower. SUMMARY

[0003] In order to solve the problems in the prior art, the present application provides an A-shaped cross-section composite pultruded profile.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an A-shaped cross-section composite pultruded profile, the profile is an integrated structure, comprising a left arm, a right arm and a cross arm, the upper ends of the left arm and the right arm are connected to form an included angle, the left arm and the right arm are connected by the cross arm, the left arm, the right arm and the cross arm are connected to form an A-shaped cross-section, the profile is made of composite material, the composite material is composed of reinforcing fibers and matrix material, and the profile is pultruded along the vertical direction of the A-shaped cross-section.

[0005] Further, the reinforcing fibers include carbon fiber fabric, glass fiber fabric or basalt fiber fabric, and the matrix material includes epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin.

[0006] Further, the shapes of the free ends of the left arm and the right arm are both circular.

[0007] Further, the diameter of the circular shape is greater than the thickness of the rectangular shape of the left arm or the right arm.

[0008] Further, the A-shaped cross-section formed by the connection of the left arm, the right arm and the cross arm includes an inner ring area, an outer ring area, a crossbar area and an intersection area, the inner ring area, the outer ring area and the crossbar area are all composed of two layers of composite material, each layer of composite material in the inner ring area is wound along the perimeter of the inner triangle, each layer of composite material in the outer ring area is wound along the perimeter of the outside of the A-shaped cross-section, and each layer of composite material in the crossbar area is wound along the perimeter of the inside of the A-shaped cross-section, the intersection area is the combined area of the inner ring area, the outer ring area and the crossbar area, and the intersection area is filled with composite material.

[0009] Further, the interfaces of the two layers of composite material in the inner ring area are located on the left and right sides of the symmetry axis of the A-shaped cross-section.

[0010] Further, the included angle of the left arm and right arm connecting end is less than 180 degrees.

[0011] Further, the cross arm is located at 1 / 3 of the lower free end of the left arm and the right arm.

[0012] Compared with the prior art, the beneficial effects of the present application are: the present application strengthens the connection of the composite material structure, improves the bearing capacity of the composite material connection, and solves the problem of low bearing capacity of the existing connection profile. The A-shaped cross section increases the local contact area of the composite material structure connector, the extrusion force generated by the structure part, and the interlaminar shear stress of the composite material is enhanced to improve the connection effect and the bearing capacity of the connection part. It is suitable for the main beam structure of communication tower, power tower or other composite material polygonal tower form, so that each edge direction of the polygonal structure has the same bearing capacity, and the product has long service life, high strength, convenient forming, simple connection and other advantages. The main beam provides a connection system between the main beams and between the main beams and the supporting rods, which can be achieved through the self-locking structure and bolt mechanical connection of the end of the main beam. It has good designability, strong connection reliability between composite material structures, can avoid using a large number of metal parts, and has convenient process forming, simple and fast installation on site. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 A cross section of an A-shaped cross section composite pultrusion profile according to the present application is shown in the figure;

[0014] Fig. 2 A cross section of an A-shaped cross section composite pultrusion profile according to the present application is shown in the figure;

[0015] 1-left arm, 2-right arm, 3-cross arm, 4-inner ring area, 5-outer ring area, 6-cross bar area, 7-interface. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0017] Reference Figs. 1-2 In this embodiment, an A-shaped cross section composite pultrusion profile is described. The profile is an integrated structure, including a left arm 1, a right arm 2 and a cross arm 3. The upper ends of the left arm 1 and the right arm 2 are connected to form an included angle. The left arm 1 and the right arm 2 are connected by the cross arm 3. The left arm 1, the right arm 2 and the cross arm 3 are connected to form an A-shaped cross section. The profile is made of composite material. The composite material is composed of reinforcing fibers and matrix material. The profile is pultruded along the vertical direction of the A-shaped cross section.

[0018] The embodiment utilizes interlaminar shear stress of composite material to enhance the connecting effect and improve the bearing capacity of the connecting part. The reinforcing fiber includes carbon fiber fabric, glass fiber fabric or basalt fiber fabric, and the matrix material includes epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin. The shapes of the lower free ends of the left arm 1 and the right arm 2 are circular, and the circular diameter is greater than the rectangular thickness of the left arm 1 or the right arm 2. The shapes of the lower free ends of the left arm 1 and the right arm 2 are transitioned from rectangular to circular, forming a transition area, and the circular transition area is connected with the adjacent composite structural member. The A-shaped cross section formed by the left arm 1, the right arm 2 and the cross arm 3 includes an inner ring area 4, an outer ring area 5, a horizontal rod area 6 and an intersection area. The inner ring area 4, the outer ring area 5 and the horizontal rod area 6 are each composed of two layers of composite materials. The inner ring area 4 is wound along the inner triangular perimeter of each layer of composite material. The outer ring area 5 is wound along the outer perimeter of the A-shaped cross section of each layer of composite material. The horizontal rod area 6 is wound along the inner perimeter of the A-shaped cross section of each layer of composite material. The intersection area is surrounded by the inner ring area 4, the outer ring area 5 and the horizontal rod area 6, and is filled with composite material. The interface 7 of the two layers of composite materials of the inner ring area 4 is located on the left and right sides of the symmetry axis of the A-shaped cross section. The included angle between the connecting ends of the left arm 1 and the right arm 2 is less than 180 degrees. The included angle is determined according to the overall structure shape during use. If the number of sides of the polygon formed is n, the included angle is (n-2)*180 / n. When the cross arm 3 is located at 1 / 3 of the lower free ends of the left arm 1 and the right arm 2, the structural stability is the highest.

[0019] The A-shaped cross section composite pultruded profile provided by the present application is described in detail above. The principles and implementation modes of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea. For those skilled in the art, according to the idea of the present application, the specific implementation mode and application range can be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A composite A-silhouette pultruded profile, characterized in that: The profile is an integrated structure, comprising a left arm (1), a right arm (2) and a cross arm (3), the upper ends of the left arm (1) and the right arm (2) are connected to form an included angle, the left arm (1) and the right arm (2) are connected through the cross arm (3), the left arm (1), the right arm (2) and the cross arm (3) are connected to form an A-shaped cross section, the profile is made of a composite material, the composite material is composed of a reinforcing fiber and a matrix material, the profile is pultruded along the vertical direction of the A-shaped cross section, the shapes of the free ends of the lower parts of the left arm (1) and the right arm (2) are both circular, the diameter of the circular shape is greater than the rectangular thickness of the left arm (1) or the right arm (2), the A-shaped cross section formed by the connection of the left arm (1), the right arm (2) and the cross arm (3) comprises an inner ring area (4), an outer ring area (5), a crossbar area (6) and an intersection area, the inner ring area (4), the outer ring area (5) and the crossbar area (6) are all composed of two layers of composite materials, each layer of composite material in the inner ring area (4) is wound along the inner triangular perimeter, each layer of composite material in the outer ring area (5) is wound along the outer perimeter of the A-shaped cross section, each layer of composite material in the crossbar area (6) is wound along the inner perimeter of the A-shaped cross section, the intersection area is the combined area of the inner ring area (4), the outer ring area (5) and the crossbar area (6), the intersection area is filled with a composite material, the interfaces (7) of the two layers of composite materials in the inner ring area (4) are located on the left and right sides of the symmetry axis of the A-shaped cross section, the reinforcing fiber comprises carbon fiber fabric, glass fiber fabric or basalt fiber fabric, the matrix material comprises epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin, the included angle formed by the connection ends of the left arm (1) and the right arm (2) is less than 180 degrees, and the cross arm (3) is located at 1 / 3 of the distance from the lower free ends of the left arm (1) and the right arm (2).

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