Anchoring device for carbon fiber reinforced composite stranded wire

Abstract

The utility model provides a carbon fiber reinforced composite material stranded wire anchoring device which is used for solving the problem that in the prior art, a carbon fiber stranded wire is uneven in stress in the anchoring process. The device comprises an anchor cylinder, a bunching ring, a wire separating body, a first limiting piece and a second limiting piece, under the action of the first limiting piece and the bunching ring, when a pulling force is applied to the carbon fiber stranded wire through a jack and other tools, the stress of each carbon fiber single wire is uniform, the non-uniform stress of the carbon fiber stranded wire in the circumferential direction is prevented, and the situation that the carbon fiber stranded wire abuts against the side face of the anchor cylinder, local damage of the carbon fiber stranded wire is caused, and the overall performance of the carbon fiber stranded wire is affected is avoided; besides, the carbon fiber stranded wires are scattered to form a plurality of carbon fiber single wires, and the carbon fiber single wires are arranged in the anchor cylinder at intervals by using the wire separating bodies, so that the contact area between the carbon fiber stranded wires and the bonding medium is increased, and the stability of the anchoring device is improved; in addition, the first limiting piece and the second limiting piece can also ensure that the bonding medium cannot leak out of the anchor barrel, so that the overall stability of the anchoring device is improved.

Description

Technical Field

[0001] The utility model belongs to the field of carbon fiber stranded wire anchorage, and particularly relates to a carbon fiber reinforced composite stranded wire anchorage device. Background Art

[0002] A carbon fiber stranded wire is a high-strength tendon bundle made by tightly winding numerous small-diameter (usually not exceeding 7 mm) carbon fiber single wires and fully infiltrating and curing them with epoxy resin. Its appearance is quite similar to that of a steel stranded wire. As a new type of fiber-reinforced material, the carbon fiber composite stranded wire has relatively low shear strength, so it is not suitable to be fixed with a traditional wedge-type anchor barrel.

[0003] In the prior art, when anchoring a carbon fiber stranded wire, usually the anchoring end of the carbon fiber stranded wire is first dispersed to form numerous small-diameter carbon fiber single wires, and then the multiple small-diameter carbon fiber single wires are sequentially placed into the anchor barrel, and tensile forces are sequentially applied to the small-diameter carbon fiber single wires, and the small-diameter carbon fiber single wires are anchored on the anchor barrel. However, in this way, since only one small-diameter carbon fiber single wire can be anchored at a time, it is very easy to cause uneven stress in the circumferential direction of the carbon fiber stranded wire, resulting in the carbon fiber stranded wire contacting the side surface of the anchor barrel, causing local damage to the carbon fiber stranded wire and affecting its overall performance. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a carbon fiber reinforced composite stranded wire anchorage device for solving the problem of uneven stress during the anchoring process of the carbon fiber stranded wire in the prior art.

[0005] To achieve the above object and other related objects, the present utility model provides a carbon fiber reinforced composite stranded wire anchorage device, including: an anchor barrel, a bunching ring, a wire splitting body, a first limiting member and a second limiting member; the bunching ring is used to bunch multiple carbon fiber single wires into a carbon fiber bundle; the bunching ring is arranged outside the anchor barrel; the first limiting member is provided with a first through hole for the carbon fiber bundle to pass through, and the first limiting member is arranged at one end of the anchor barrel and is used to abut against one end of the bunching ring close to the anchor barrel; the second limiting member is provided with a second through hole for the carbon fiber stranded wire to pass through, the second limiting member is arranged inside the anchor barrel, and the second limiting member is used to abut against the inner side surface of the anchor barrel; the wire splitting body is provided with a plurality of third through holes for single carbon fiber single wires to pass through; the wire splitting body is arranged inside the anchor barrel and is located between the first limiting member and the second limiting member; a bonding medium is also poured into the anchor barrel.

[0006] Optionally, at least one of the plurality of third through holes has a cross-sectional shape that is arc-shaped along its extending direction, and the arc-shaped opening is arranged towards the center line of the wire splitting body.

[0007] Optionally, the wire splitting body is made of a material with a negative Poisson's ratio.

[0008] Optionally, the bonding medium is epoxy resin and / or iron sand.

[0009] Optionally, the second through hole is a non-circular structure adapted to the outer surface of the carbon fiber stranded wire.

[0010] Optionally, the first through hole is tapered in the direction close to the anchor barrel.

[0011] Optionally, the bunching ring includes a bunching section and a limiting section. The inner diameter of the bunching section is tapered in the direction close to the anchor barrel; the inner diameter of the limiting section is smaller than the diameter of the carbon fiber bundle.

[0012] Optionally, the diameter of the limiting section is smaller than the diameter of the carbon fiber bundle.

[0013] Optionally, the limiting section is a non-circular structure adapted to the outer surface of the carbon fiber stranded wire.

[0014] Optionally, the bunching ring further includes a transition section. One end of the transition section is connected to the bunching section, and the other end is connected to the limiting section.

[0015] As described above, a carbon fiber reinforced composite material stranded wire anchoring device of the present utility model has at least the following beneficial effects: By utilizing the functions of the first limiting member and the bunching ring, when applying a tensile force to the carbon fiber stranded wire by using tools such as a jack, the forces on each carbon fiber single wire are uniform, preventing uneven forces in the circumferential direction of the carbon fiber stranded wire, avoiding the carbon fiber stranded wire from abutting against the side surface of the anchor barrel, causing local damage to the carbon fiber stranded wire and affecting its overall performance. In addition, the carbon fiber stranded wire is dispersed into multiple carbon fiber single wires, and the wire separating body is used to space the multiple carbon fiber single wires in the anchor barrel, so as to increase the contact area between the carbon fiber stranded wire and the bonding medium and enhance the stability of the anchoring device. Moreover, the first limiting member and the second limiting member can also ensure that the bonding medium does not leak out of the anchor barrel, thereby improving the overall stability of the anchoring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows a schematic structural view of a carbon fiber reinforced composite material stranded wire anchoring device of the present utility model.

[0017] Figure 2 Shows a schematic connection view of the carbon fiber stranded wire, the wire separating body, the bunching ring and the second limiting member of the present utility model.

[0018] Figure 3 Shows a schematic structural view of the wire separating body of the present utility model.

[0019] Figure 4 Shows a cross-sectional view of the wire separating body of the present utility model.

[0020] Figure 5 Shows a schematic structural view of the bunching ring of the present utility model.

[0021] Description of Component Labels:

[0022] 1. Anchor tube, 2. Beam-forming ring, 21. Beam-forming section, 22. Limiting section, 23. Transition section, 3. Wire-splitting body, 31. Third through-hole, 4. First limiting member, 5. Second limiting member. Specific Embodiment

[0023] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0024] Please refer to all the following drawings. It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have any technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the implementation scope of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present utility model can implement.

[0025] The following various embodiments are only for illustration purposes. Combinations can be made between the various embodiments, and it is not limited to the content shown in the following single embodiment.

[0026] Please refer to Figure 1 、 2 , the present utility model provides a carbon fiber reinforced composite stranded wire anchoring device. The anchoring device includes: an anchor tube 1, a beam-forming ring 2, a wire-splitting body 3, a first limiting member 4, and a second limiting member 5; the beam-forming ring 2 is used to polymerize a plurality of carbon fiber single wires into a carbon fiber bundle; the beam-forming ring 2 is arranged outside the anchor tube 1; the first limiting member 4 is provided with a first through-hole for the carbon fiber bundle to pass through, and the first limiting member 4 is arranged at one end of the anchor tube 1 and is used to abut against one end of the beam-forming ring 2 close to the anchor tube 1; the second limiting member 5 is provided with a second through-hole for the carbon fiber stranded wire to pass through, and the second limiting member 5 is arranged inside the anchor tube 1 and is used to abut against the inner side surface of the anchor tube 1; the wire-splitting body 3 is provided with a plurality of third through-holes 31 for a single carbon fiber single wire to pass through; the wire-splitting body 3 is arranged inside the anchor tube 1 and is located between the first limiting member 4 and the second limiting member 5; a bonding medium is also filled in the anchor tube 1.

[0027] Specifically, the anchor tube 1 can be a conical anchor tube 1. The first limiting member 4 is arranged at the large end of the conical anchor tube 1, used to close the large end of the conical anchor tube 1 and play a role in fixing the beam-forming ring 2. The second limiting member 5 is arranged at the small end of the conical anchor tube 1, used to close the small end of the conical anchor tube 1. The first limiting member 4 and the second limiting member 5 can be cylindrical structures. An opening for pouring the bonding medium into the anchor tube 1 can be provided on the side wall of the anchor tube 1. After the bonding medium is filled into the anchor tube 1, the first limiting member 4 and the second limiting member 5 can ensure that the bonding medium in the anchor tube 1 will not leak out of the anchor tube 1. The bonding medium can be epoxy resin, iron sand or a mixture of epoxy resin and iron sand. In other embodiments, the bonding medium can also be concrete, etc., and this embodiment does not limit this.

[0028] During use, the carbon fiber bundle can be first dispersed by a silicone dissolving agent to form multiple carbon fiber single wires, and then rinsed with clean water to carefully wash away the remaining dissolved silicone between the multiple carbon fiber single wires, ensuring that the surfaces of the carbon fiber single wires are clean, dry and free of impurity residues. After cleaning, the multiple carbon fiber single wires are integrally inserted into the anchor tube 1, and then the second limiting member 5 is arranged on the carbon fiber bundle by using the second through hole and abuts against the inner side wall of the anchor tube 1; after the second limiting member 5 is arranged, the multiple carbon fiber single wires are sequentially inserted into the third through holes 31 of the wire dividing body 3, and the wire dividing body 3 is also located inside the anchor tube 1. Then the multiple carbon fiber single wires are extended out of the anchor tube 1 through the first through hole of the first limiting member 4, and the end extending out of the anchor tube 1 forms a carbon fiber bundle under the action of the beam-forming ring 2. At this time, tools such as a jack can be used to apply a certain tensile force to the carbon fiber bundle, that is, to the carbon fiber stranded wire, to ensure the connection strength between the carbon fiber stranded wire and the matrix. Finally, the bonding medium is poured into the anchor tube 1 to anchor the carbon fiber bundle in the anchor tube 1.

[0029] In this embodiment, the carbon fiber stranded wire is dispersed to form multiple carbon fiber single wires, and the wire dividing body 3 is used to space the multiple carbon fiber single wires in the anchor tube 1, so as to increase the contact area between the carbon fiber stranded wire and the bonding medium and improve the stability of the anchoring device; in addition, under the action of the first limiting member 4 and the beam-forming ring 2, when a tensile force is applied to the carbon fiber stranded wire by tools such as a jack, the forces on each carbon fiber single wire are uniform, preventing uneven circumferential forces on the carbon fiber stranded wire and avoiding the carbon fiber stranded wire from abutting against the side of the anchor tube 1, causing local damage to the carbon fiber stranded wire and affecting its overall performance. In addition, the first limiting member 4 and the second limiting member 5 can also ensure that the bonding medium will not leak out of the anchor tube 1, so as to improve the overall stability of the anchoring device.

[0030] It can be understood that the starting end of the single carbon fiber line can be the position where the second limiting member 5 is provided on the carbon fiber stranded wire, so as to ensure that the second through hole of the second limiting member 5 is in full contact with the outer surface of the carbon fiber stranded wire, thereby ensuring that the bonding medium does not leak out of the anchor tube 1 through the second through hole. In one embodiment, the second through hole is a non-circular structure adapted to the outer surface of the carbon fiber stranded wire; specifically, since the interface of the carbon fiber stranded wire perpendicular to its extending direction is non-circular, the second through hole is set as a non-circular structure adapted to the outer surface of the carbon fiber stranded wire, thereby ensuring that the second through hole is in full contact with the outer surface of the carbon fiber stranded wire.

[0031] Please refer to Figure 3 , 4 , at least one of the plurality of third through holes 31 has an arcuate cross-sectional shape along its extending direction, and the arcuate opening is arranged towards the center line of the wire splitting body 3. Specifically, the number of the third through holes 31 of the wire splitting body 3 can be set to be equal to the number of single fibers. The third through hole 31 on the center line of the wire splitting body 3 can be a cylindrical through hole for passing through the single carbon fiber line at the center of the carbon fiber stranded wire, and the remaining third through holes 31 can be arranged at intervals in a ring around the third through hole 31, and the cross-sectional shape along its extending direction is arcuate (such as Figure 4 the upper and lower two third through holes 31). Since the single carbon fiber lines far from the center of the carbon fiber stranded wire are in a state of being gathered at both ends and dispersed in the middle in the anchor tube 1, by setting the cross-sectional shape of the remaining third through holes 31 around the third through hole 31 at the center of the wire splitting body 3 along its extending direction to be arcuate, it can effectively prevent the single carbon fiber line from abutting against both ends of the corresponding third through hole 31 when stressed, causing damage to the single carbon fiber line; and ensuring the uniform stress of each single carbon fiber line in the anchoring section, reducing the damage of the stranded wire caused by local stress concentration, thereby improving the connection strength and durability between the carbon fiber stranded wire and the matrix.

[0032] The wire splitting body 3 can be made of a material with a negative Poisson's ratio. The negative Poisson's ratio wire splitting body 3 is a special structure with the property of negative Poisson's ratio. When it is axially stretched, the wire splitting body 3 will not only not contract laterally, but will expand laterally, improving the connection strength between the stranded wire and the matrix.

[0033] The first through hole is gradually expanded along the direction close to the anchor tube 1. Specifically, the small end of the first through hole faces the bunching ring 2, and the large end faces the anchor tube 1. By gradually expanding the first through hole along the direction close to the anchor tube 1, it is convenient to guide a plurality of single carbon fiber lines into the bunching ring 2, so that the bunching ring 2 can bunch a plurality of single carbon fiber lines into a carbon fiber bundle.

[0034] Please refer to Figure 5, the bunching ring 2 includes a bunching section 21 and a limiting section 22. The inner diameter of the bunching section 21 is gradually enlarged in the direction close to the anchor tube 1; the inner diameter of the limiting section 22 is smaller than the diameter of the carbon fiber bundle. Specifically, the bunching ring 2 is a ring-shaped structure with a through hole inside. The through hole can be divided into a bunching section 21 and a limiting section 22. The bunching section 21 is used to gradually polymerize multiple carbon fiber single wires to form a carbon fiber bundle. The limiting section 22 is used to limit the carbon fiber bundle and prevent relative movement between the carbon fiber bundle and the bunching ring 2. The diameter of the limiting section 22 can be smaller than the diameter of the carbon fiber bundle, that is, an interference fit is formed between the limiting section 22 and the carbon fiber bundle. To increase the contact area between the limiting section 22 and the carbon fiber bundle, the limiting section 22 can be set as a non-circular structure adapted to the outer surface of the carbon fiber stranded wire. In one implementation, the bunching ring 2 further includes a transition section 23. One end of the transition section 23 is connected to the bunching section 21, and the other end is connected to the limiting section 22. Specifically, the transition section 23 can be a structure connecting the limiting section 22 and the bunching section 21, and is used to guide the carbon fiber bundle in the bunching section 21 into the limiting section 22.

[0035] The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A carbon fiber reinforced composite stranded wire anchoring device, characterized in that, The anchoring device includes: an anchor tube, a bunching ring, a wire splitting body, a first limiting member, and a second limiting member; The bunching ring is used to polymerize a plurality of single carbon fiber wires into a carbon fiber bundle; the bunching ring is arranged outside the anchor tube; The first limiting member is provided with a first through hole for the carbon fiber bundle to pass through, and the first limiting member is arranged at one end of the anchor tube and is used to abut against one end of the bunching ring close to the anchor tube; The second limiting member is provided with a second through hole for the carbon fiber stranded wire to pass through, and the second limiting member is arranged inside the anchor tube, and the second limiting member is used to abut against the inner side surface of the anchor tube; The wire splitting body is provided with a plurality of third through holes for single carbon fiber wires to pass through; the wire splitting body is arranged inside the anchor tube and is located between the first limiting member and the second limiting member; The inside of the anchor tube is also filled with a bonding medium.

2. The carbon fiber reinforced composite stranded wire anchoring device according to claim 1, characterized in that: At least one of the plurality of third through holes has a cross-sectional shape that is circular arc-shaped along its extending direction, and the circular arc opening is arranged towards the center line of the wire splitting body.

3. The carbon fiber reinforced composite stranded wire anchoring device according to claim 2, characterized in that: The wire splitting body is made of a material with a negative Poisson's ratio.

4. The carbon fiber reinforced composite stranded wire anchoring device according to claim 1, characterized in that: The bonding medium is epoxy resin and / or iron sand.

5. The carbon fiber reinforced composite stranded wire anchoring device according to claim 1, characterized in that: The second through hole is a non-circular structure adapted to the outer surface of the carbon fiber stranded wire.

6. The carbon fiber reinforced composite stranded wire anchoring device according to claim 1, characterized in that: The first through hole is gradually expanding along the direction close to the anchor tube.

7. The carbon fiber reinforced composite stranded wire anchoring device according to claim 6, characterized in that: The bunching ring includes a bunching section and a limiting section, and the inner diameter of the bunching section is gradually expanding along the direction close to the anchor tube; the inner diameter of the limiting section is smaller than the diameter of the carbon fiber bundle.

8. A carbon fiber reinforced composite stranded wire anchoring device according to claim 7, characterized in that: The diameter of the limiting section is smaller than the diameter of the carbon fiber bundle.

9. The carbon fiber reinforced composite stranded wire anchoring device according to claim 7, characterized in that: The limiting section is a non-circular structure adapted to the outer surface of the carbon fiber stranded wire.

10. A carbon fiber reinforced composite stranded wire anchoring device according to claim 7, characterized in that: The bunching ring further includes a transition section, one end of the transition section is connected to the bunching section, and the other end is connected to the limiting section.

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