CN217399392U

CN217399392U - Anchor head for carbon fiber cable, anchoring device and connecting beam structure

Info

Publication number: CN217399392U
Application number: CN202221258896.XU
Authority: CN
Inventors: 李传琳; 张敦宝; 庞林; 曾永平; 陈克坚; 姚志国; 彭勃; 陶奇; 郑晓龙; 杨国静
Original assignee: CREEC Kunming Survey Design and Research Co Ltd
Current assignee: CREEC Kunming Survey Design and Research Co Ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-09-09
Anticipated expiration: 2032-05-24

Abstract

The utility model relates to the field of building construction, in particular to an anchor head for a carbon fiber cable, which comprises an anchoring section and an end cap, wherein the anchoring section comprises an installation cavity with openings at two ends, and the end cap is used for plugging one end opening of the installation cavity; the cross section of the installation cavity is gradually reduced along the direction far away from the plug; a first clamping piece and a second clamping piece are arranged in the mounting cavity, the first clamping piece comprises a first attaching surface and a first clamping surface, and the first attaching surface and the first clamping surface are opposite surfaces of the first clamping piece; the second clamping sheet comprises a second abutting surface and a second clamping surface; the second abutting surface and the second clamping surface are opposite surfaces of the second clamping sheet; the first clamping surface and the second clamping surface are both planar; the first attaching surface and the second attaching surface are attached to the mounting cavity, and the first clamping surface and the second clamping surface can extrude two opposite side faces of the carbon fiber cable.

Description

Anchor head for carbon fiber cable, anchoring device and connecting beam structure

Technical Field

The utility model relates to a bridge construction equipment, especially an anchor head, an anchor and even roof beam structure for carbon fiber cable.

Background

Anchor cables are commonly used in the art for attachment. The existing anchor cable is usually formed by steel strands, and large bearing capacity is required in design due to small elastic strain of steel, so that the manufacturing cost of an anchoring structure and an anchorage device is undoubtedly and remarkably increased. On the other hand, the steel has the defect of poor corrosion resistance and durability, and the design requirement of the service life of the highway bridge is difficult to meet in the field of bridges. The anchor cable made of the carbon fiber material has the advantages of high specific strength, good fatigue resistance, good corrosion resistance and the like, so that the anchor cable made of the carbon fiber material is widely applied to the beam connecting device. At present, common carbon fiber composite cables mainly comprise forms of parallel bar cables, parallel plate cables, stranded cables, pull rod cables and the like, wherein the cross section of each carbon fiber cable is rectangular, and two opposite side surfaces of each carbon fiber cable are parallel. However, the existing anchor head for the steel strand cannot be applied to the anchor cable made of the carbon fiber material, and the existing anchor head for the steel strand cable is not provided with the carbon fiber cable anchoring device and the connecting beam structure in the field of bridge earthquake resistance, so that the anchor head for the anchor cable made of the carbon fiber material, the anchoring device connected with the bridge beam section and the connecting beam structure are urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the problem that the anchor head of the carbon fiber material anchor cable can be used in the prior art, the anchor head, the anchoring device and the connecting beam structure for the carbon fiber cable are provided.

In order to realize the purpose, the utility model discloses a technical scheme be:

an anchor head for a carbon fiber cable comprises an anchoring section and a plug, wherein the anchoring section comprises an installation cavity with openings at two ends, and the plug is used for plugging the opening at one end of the installation cavity; the cross section of the installation cavity is gradually reduced along the direction far away from the plug;

a first clamping piece and a second clamping piece are arranged in the mounting cavity, the first clamping piece comprises a first attaching surface and a first clamping surface, and the first attaching surface and the first clamping surface are opposite surfaces of the first clamping piece; the second clamping sheet comprises a second abutting surface and a second clamping surface; the second abutting surface and the second clamping surface are opposite surfaces of the second clamping sheet;

the first attaching surface and the second attaching surface are attached to the back of the installation cavity, and the first clamping surface and the second clamping surface can extrude the carbon fiber cable through surface contact.

Through setting up the end cap, can avoid first clamp tight piece and the tight piece of second clamp to drop from the installation intracavity. The first clamping piece and the second clamping piece extrude the carbon fiber cable through the first clamping surface and the second clamping surface, and the carbon fiber cable can be clamped. The carbon fiber cable is in surface contact with the first clamping piece and the second clamping piece, clamping force can be uniformly applied to the surface of the carbon fiber cable, so that the carbon fiber cable is more uniformly stressed, and the carbon fiber cable is prevented from being damaged due to uneven stress. The section of installation cavity reduces along the direction of keeping away from the end cap gradually, first clamp piece and second press from both sides tight piece in the installation cavity, a side surface (first binding face, second binding face) and installation cavity laminating, another side surface (first clamp face, the second presss from both sides tight face) and the laminating of carbon fiber cable, consequently, first clamp piece can play the effect of wedge with the second presss from both sides tight piece, when the carbon fiber cable has the trend that moves to the less one end of installation cavity cross section, the clamp force of first clamp piece and second clamp piece to carbon fiber cable increases, avoid carbon fiber cable and anchor head separation. Because the cross-section of installation cavity reduces along the direction of keeping away from the end cap gradually, and the equal open-ended mode in both ends of installation cavity can penetrate the great one end of installation cavity cross section with first clamp piece, the second clamp piece and the carbon fiber cable that is pressed from both sides tightly, consequently, need not to cut apart the anchor section, and the wholeness of anchor section is good.

As the preferred scheme of the utility model, first tight face of clamp is provided with first metal copper layer, the tight face of clamp of second is provided with second metal copper layer, first metal copper layer second metal copper layer is used for laminating with the carbon fiber cable.

Copper can produce the deformation, realizes laminating better with the carbon fiber cable, and copper still has certain intensity as the metal simultaneously.

As the preferred scheme of the utility model, the end cap with anchor section threaded connection.

As the preferred embodiment of the present invention, the plug can contact with the first clamping piece and/or the second clamping piece during the screwing process.

The plug is screwed to be in contact with the first clamping piece or the second clamping piece, so that the plug can push the first clamping piece or the second clamping piece to move, the distance between the first clamping piece and the second clamping piece is further changed, and the clamping force on the carbon fiber cable is adjusted.

As the preferred scheme of the utility model, the cross section of installation cavity is the rectangle, first binding face with second binding face is planar structure.

As a preferred scheme of the utility model, the cross section of installation cavity is circular, first binding face with the second binding face is the arc surface.

As the preferred scheme of the utility model, the anchor section appearance is cylindricly, the surface of anchor section is provided with the external screw thread.

The external thread of the anchoring section can facilitate the connection with a plate-shaped or tubular structure in the environment through threads; and the axial movement can be realized by rotating the anchoring section so as to adapt to the installation error in the axial direction and avoid overlarge or undersize stress of the installed carbon fiber cable. In addition, the carbon fiber cable can be adjusted by rotating the anchoring section, so that torsion of the carbon fiber cable after installation can be avoided, and the reduction of the bearing capacity of the carbon fiber cable is avoided.

An anchoring device comprises a bearing plate, a tensioning nut and the anchor head for the carbon fiber cable, wherein the anchor head is in threaded connection with the tensioning nut; the bearing plate is arranged at one end with a smaller section of the installation cavity and used for transmitting acting force between the tensioning nut and a building body; the bearing plate is provided with a through hole, and the through hole is used for the anchor head and the carbon fiber cable to pass through.

Through setting up stretch-draw nut and anchor head threaded connection, can realize the stretch-draw to carbon fiber cable.

As the preferred scheme of the utility model, the stretch-draw nut with still be provided with belleville spring between the bearing plate.

The connecting beam structure comprises a carbon fiber cable, wherein two ends of the carbon fiber cable are provided with anchoring devices, and the anchoring devices are the anchoring devices; the first beam section is provided with a first through hole, the second beam section is provided with a second through hole, and the carbon fiber cable penetrates through the first through hole and the second through hole and then is anchored by the anchoring device, so that the first beam section is connected with the second beam section.

The anchor cable made of the carbon fiber material is used for connecting the beams, so that the elastic energy storage capacity is higher, the anchor cable can adapt to larger relative displacement between beam sections, the inelastic damage probability of the anchor cable after an earthquake is reduced, the operation that the anchor cable needs to be replaced after the earthquake is reduced, and the construction cost is saved.

As the utility model discloses an optimal scheme, first through-hole with the second through-hole is provided with the chamfer, the chamfer is close to the bridge branch pore line department of first roof beam section and second roof beam section.

Through setting up the chamfer, can reduce construction error or the carbon fiber cable horizontal bending or cable body and concrete collision extrusion cause the probability of cable body damage under the seismic action.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the both ends opening of installation cavity is convenient for pack into first clamping piece, second clamping piece and carbon fiber cable, therefore anchor section can adopt overall structure, and the wholeness is better.

2. The outer surface of the anchoring section is provided with external threads, so that the anchoring section can be conveniently connected with the embedded devices of the existing platy or tubular structures and the like in a threaded manner, and the anchor head can be conveniently disassembled and assembled.

3. Compared with the existing anchor heads with other shapes, the anchor head with the circular cross section is adopted, the threads are arranged on the outer surface of the anchor head, the anchor head is connected with the existing plate-shaped and tubular structures through the threads, the rotation error generated during installation of the carbon fiber cable can be adapted by screwing or screwing out the anchor head, and the torsion generated after installation of the carbon fiber cable is avoided; the method can also adapt to the installation error in the length direction of the carbon fiber cable, avoid overlarge or undersize prestress of the carbon fiber cable, and has larger construction installation fault-tolerant capability.

4. Provided is an anchoring device which can anchor and tension a carbon fiber cable.

Drawings

FIG. 1 is a schematic view of the structure of the anchor head of the present invention;

FIG. 2 is a front view of the anchoring section of the present invention;

FIG. 3 is a cross-sectional view of the anchoring section of the present invention;

fig. 4 is a left side view of the anchoring section of the present invention;

fig. 5 is a schematic structural view of the plug of the present invention;

FIG. 6 is a schematic view of the first grip tab, the second grip tab engaging the carbon fiber cord;

FIG. 7 is a front view of the first grip tab, the second grip tab engaging the carbon fiber cord;

FIG. 8 is a schematic structural view of the carbon fiber cable after being fixed by the anchor head;

fig. 9 is a schematic structural view of an anchoring device according to the present invention;

fig. 10 is one of the schematic views of the middle coupling beam structure of the present invention;

fig. 11 is a second schematic view of the middle coupling beam structure of the present invention;

FIG. 12 is an enlarged view at A in FIG. 11;

fig. 13 is an enlarged view at B in fig. 11.

An icon: 1-an anchoring section; 2-mounting a cavity; 21-a first bevel; 22-a second bevel; 3-plug; 4-a first clamping piece; 5-a second clamping piece; 6-a first metallic copper layer; 7-a second metallic copper layer; 8-carbon fiber cable; 9-an anchoring device; 91-an anchor head; 92-tensioning the nut; 93-a pressure bearing plate; 94-belleville springs; 10-a first beam section; 101-a first via; 11-a second beam section; 111-a second via; 12-PVC pipe; 13-spiral reinforcing steel bars; 14-bridge split line.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

The embodiment provides an anchor head for a carbon fiber cable, which comprises an anchoring section 1 and a plug 3 as shown in fig. 1, wherein the anchoring section 1 comprises an installation cavity 2 with openings at two ends as shown in fig. 3, and one end of the installation cavity 2 is plugged through the plug 3. The cross section of the installation cavity 2 is gradually reduced along the direction far away from the plug 3. A first clamping piece 4 and a second clamping piece 5 are arranged in the mounting cavity 2, the first clamping piece 4 comprises a first attaching surface and a first clamping surface, and the first attaching surface and the first clamping surface are opposite surfaces on the first clamping piece 4; the second clamping sheet 5 comprises a second abutting surface and a second clamping surface; the second binding surface and the second clamping surface are opposite surfaces on the second clamping sheet 5; the first clamping surface and the second clamping surface are matched with the carbon fiber cable 8 in shape, namely the first clamping surface and the second clamping surface can be planes or cambered surfaces; after the first attaching surface and the second attaching surface are attached to the installation cavity 2, the first clamping surface and the second clamping surface can extrude two opposite side surfaces of the carbon fiber cable 8. In order to increase the friction coefficient between the first clamping piece 4, the second clamping piece 5 and the carbon fiber cable 8 and to realize more reliable clamping of the carbon fiber cable 8, the first clamping surface and the second clamping surface can be subjected to sand blasting treatment so as to increase the surface roughness of the first clamping surface and the second clamping surface.

As shown in fig. 8, when the carbon fiber cable 8 is clamped by the anchor head according to the present embodiment, the carbon fiber cable 8 is in surface contact with the first grip piece 4 and the second grip piece 5. When the carbon fiber cable 8 is pulled, the acting force from the anchoring section 1 on the first clamping piece 4 and the second clamping piece 5 is increased, the carbon fiber cable 8 is clamped more firmly, and the carbon fiber cable 8 is prevented from being separated from the anchor head.

In this embodiment, the anchoring section 1 is of a unitary structure, and in other embodiments, the anchoring section 1 may be of a split type for easy processing.

In this embodiment, as shown in fig. 3 and 4, the cross section of the installation cavity 2 is rectangular, and two opposite surfaces of the installation cavity 2, namely, the upper surface and the lower surface, are inclined surfaces, which are denoted as a first inclined surface 21 and a second inclined surface 22. The first clamping piece 4 and the second clamping piece 5 are both wedge-shaped, after the first clamping piece 4 and the second clamping piece 5 are attached to the inclined plane of the installation cavity 2, the opposite surfaces of the first clamping piece 4 and the second clamping piece 5 are parallel to each other, and a space between the two parallel surfaces is used for clamping the carbon fiber cable 8. In some embodiments, as shown in fig. 6 and 7, in order to make the force applied to the carbon fiber cable 8 more uniform and to make the clamping of the carbon fiber cable 8 more reliable, a first copper metal layer 6 is provided on the first clamping surface and a second copper metal layer 7 is provided on the second clamping surface. In other embodiments, the cross section of the mounting cavity 2 may also be circular, that is, the mounting cavity 2 is in a circular truncated cone shape as a whole, and the first abutting surface of the first clamping piece 4 and the second abutting surface of the second clamping piece 5 are both circular arc surfaces correspondingly.

In this embodiment, the plug 3 and the anchoring section 1 may be connected by a thread, as shown in fig. 3, an internal thread is provided in the anchoring section 1, and a surface provided with the internal thread is connected with a surface of the installation cavity 2. In the process of screwing the plug 3 into the anchoring section 1, the plug 3 can be in contact with the first clamping piece 4 and/or the second clamping piece 5 and generate interaction force, and the action force of the first clamping piece 4 and the second clamping piece 5 on the carbon fiber cable 8 is increased.

In this embodiment, as shown in fig. 2 and 4, the outer surface of the anchoring section 1 is a cylindrical surface, an external thread is provided on the outer surface of the anchoring section 1, and the detachable connection of the anchor head and the structural body such as the bridge can be realized through the external thread on the anchoring section 1, so that the anchor head can be conveniently detached. Meanwhile, the installation position of the carbon fiber cable 8 is adjusted by screwing or unscrewing the anchor head, so that the installation error of the carbon fiber cable 8 in the axial direction is adapted, or the condition that the carbon fiber cable 8 is twisted is avoided.

Example 2

The embodiment provides a carbon fiber cable anchoring structure, and the carbon fiber cable 8 is clamped by using the anchor head for the carbon fiber cable 8 provided by the technical scheme in the embodiment 1. As shown in fig. 8, one end of the carbon fiber cable 8 is arranged between the first clamping piece 4 and the second clamping piece 5, and the other end of the carbon fiber cable passes through the end with the smaller cross section of the installation cavity 2; the first clamping piece 4 and the second clamping piece 5 are in surface contact with the carbon fiber cable 8; one end of the anchoring section 1 is provided with a plug 3.

Example 3

An anchoring device 9, as shown in fig. 9 and 10, includes an anchor head 91, a tensioning nut 92 is provided outside the anchor head 91 to realize tensioning of a carbon fiber cable 8 and fixing of the anchor head 91, a bearing plate 93 is provided on one side of the tensioning nut 92, and the bearing plate 93 is used for transmitting an acting force between the tensioning nut 92 and a building body. The anchor head 91 can adopt the anchor head 91 provided by the technical scheme in the embodiment 1, the bearing plate 93 is positioned at one end of the anchor head 91 with the smaller cross section of the installation cavity, and the bearing plate 93 is also provided with a through hole for the carbon fiber cable 8 to pass through.

In some embodiments, a belleville spring 94 is also provided between the tension nut 92 and the bearing plate 93 to accommodate temperature induced expansion and contraction of the carbon fiber cable 8.

Example 4

A beam connecting structure is characterized in that a first beam section 10 and a second beam section 11 are connected by adopting a carbon fiber cable and an anchoring device 9 provided in the technical scheme in the embodiment 3. As shown in fig. 10 to 13, the first beam section 10 and the second beam section 11 are respectively provided with a first through hole 101 and a second through hole 111, the axes of which are parallel to each other, the first through hole 101 and the second through hole 111 can be obtained by pre-embedding the PVC pipe 12 during casting, and the pipe cavity of the PVC pipe 12 is the first through hole 101 and the second through hole 111. After the carbon fiber cable 8 penetrates through the first through hole 101 and the second through hole 111, the two ends of the carbon fiber cable 8 are respectively anchored to the first beam section 10 and the second beam section 11 by using the anchoring device 9, specifically, the two ends of the carbon fiber cable are fixedly connected with the anchor head 91 through the clamping pieces in the anchor head 91, and then the carbon fiber cable 8 is tensioned and fixed by the tensioning nut 92.

Considering that the cable body is damaged due to the fact that the carbon fiber cable 8 is transversely bent or the cable body collides and extrudes with concrete under the action of construction errors or earthquakes, chamfers are further arranged on the first through hole 101 and the second through hole 111 and arranged at the bridge branch hole line 14 to form a bell mouth shape, and therefore the possibility that the carbon fiber cable 8 is damaged is reduced.

In some embodiments, as shown in fig. 12, a spiral reinforcement 13 is further cast in the beam section, and the spiral reinforcement 13 is sleeved outside the PVC pipe 12 and is located at one end of the PVC pipe 12 close to the anchoring device 9.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The anchor head for the carbon fiber cable is characterized by comprising an anchoring section (1) and a plug (3), wherein the anchoring section (1) comprises an installation cavity (2) with openings at two ends, and the plug (3) is used for plugging the opening at one end of the installation cavity (2); the cross section of the installation cavity (2) is gradually reduced along the direction far away from the plug (3);

a first clamping piece (4) and a second clamping piece (5) are arranged in the mounting cavity (2), the first clamping piece (4) comprises a first attaching surface and a first clamping surface, and the first attaching surface and the first clamping surface are opposite surfaces on the first clamping piece (4); the second clamping sheet (5) comprises a second abutting surface and a second clamping surface; the second abutting surface and the second clamping surface are opposite surfaces on the second clamping sheet (5);

the first attaching surface and the second attaching surface are attached to the mounting cavity (2), and the first clamping surface and the second clamping surface can extrude the carbon fiber cable through surface contact.

2. An anchor head for a carbon fibre cable as claimed in claim 1, wherein the first clamping surface is provided with a first copper layer (6) of metal, and the second clamping surface is provided with a second copper layer (7) of metal, the first copper layer (6) and the second copper layer (7) of metal being adapted to engage with the carbon fibre cable.

3. An anchor head for a carbon fibre cable as claimed in claim 1, wherein the plug (3) is threadedly connected to the anchoring section (1).

4. An anchor head for carbon fibre cables as claimed in claim 3, characterised in that said plug (3) is able to come into contact with said first gripping blade (4) and/or said second gripping blade (5) during the tightening of said plug.

5. An anchor head for a carbon fibre cable as claimed in claim 1, wherein the mounting cavity (2) is rectangular in cross-section and the first and second abutment surfaces are of planar configuration.

6. An anchor head for a carbon fibre cable as claimed in any one of claims 1 to 5, wherein the anchoring section (1) is cylindrical in shape and the outer surface of the anchoring section (1) is provided with external threads.

7. An anchoring device, characterized by comprising a bearing plate (93), a tensioning nut (92) and an anchor head (91) for a carbon fibre cable of claim 6, said anchor head (91) being in threaded connection with said tensioning nut (92); the bearing plate (93) is arranged at one end of the installation cavity (2) with a smaller section, and the bearing plate (93) is used for transmitting acting force between the tensioning nut (92) and a building body; the bearing plate (93) is provided with a through hole, and the through hole is used for the anchor head (91) and the carbon fiber cable (8) to pass through.

8. An anchoring device according to claim 7, characterised in that a belleville spring (94) is also provided between the tension nut (92) and the bearing plate (93).

9. A coupling beam structure, characterized by comprising a carbon fiber cable (8), wherein both ends of the carbon fiber cable (8) are provided with anchoring devices (9), and the anchoring devices (9) are the anchoring devices (9) according to any one of claims 7 to 8; the first beam section (10) is provided with a first through hole (101), the second beam section (11) is provided with a second through hole (111), and the carbon fiber cable (8) penetrates through the first through hole (101) and the second through hole (111) and then is anchored through the anchoring device (9), so that the first beam section (10) is connected with the second beam section (11).

10. A beam connecting structure according to claim 9, characterized in that said first through hole (101) and said second through hole (111) are provided with chamfers near the bridge split line (14) of the first beam section (10) and the second beam section (11).