Carbon fiber plate anchoring device with concave surface

Abstract

The utility model relates to a concave surface carbon fiber plate anchoring device, and relates to the technical field of anchoring, the concave surface carbon fiber plate anchoring device comprises an anchor base and an anchor block, the anchor base is provided with an insertion groove, the shape of the insertion groove is matched with the shape of the anchor block, and the insertion groove is used for allowing the anchor block to be inserted therein; one side of the anchor block is a press-fit part attached to the inner side wall of the inserting groove, the other side of the anchor block is a contact part attached to the carbon fiber plate, and the cross section of the press-fit part is a concave face with the middle lower than the two ends. Through cooperation of all the components, the force transmission mode between the anchor block and the anchor base and between the anchor block and the carbon fiber plate can be changed, in the stress process of the anchor block, the middle of the anchor block bears large pressure and is not prone to arching, therefore, stress is prevented from being concentrated at the two ends of the carbon fiber plate, force is more concentrated in the middle of the anchor block, and the service life of the anchor block is prolonged. And the whole stress direction is dispersed towards the two ends of the anchor block, so that the stress distribution on the carbon fiber plate is more uniform, and the anchoring effect of the anchoring device is better.

Description

Technical Field

[0001] The present application relates to the field of anchoring technology, and in particular to a concave carbon fiber plate anchoring device. Background Art

[0002] Traditional civil engineering often uses steel strands as reinforcement, but steel, as a metal material, cannot avoid the occurrence of metal corrosion. Corrosion causes cross-sectional loss, resulting in a decrease in bearing capacity and posing a hidden danger to structural safety. To solve this problem, researchers have adopted methods such as surface brushing and cathodic protection, but none of them can fundamentally avoid the corrosion of steel. Carbon fiber materials have good corrosion resistance and have been increasingly used in recent years.

[0003] Prestressed carbon fiber plate reinforcement stands out due to its advantages of active reinforcement and good corrosion resistance, and has become the new favorite of external prestressed reinforcement. For the anchoring of carbon fiber plates, wedge-shaped anchor blocks or flat anchor blocks are often used in engineering with corresponding anchor seats. The anchor block is inserted into the anchor seat and one side is attached to the inner wall of the anchor seat, and the other side is attached to the end of the carbon fiber plate to clamp and fix the carbon fiber plate in the anchor seat.

[0004] The cross-sections of common wedge-shaped anchors and flat plate anchors are rectangular or arched. When tensioning wide carbon fiber plates, the two end areas of the wedge-shaped anchors and the flat plate anchors are subjected to greater pressure, while the area near the central axis is subjected to less pressure, causing the middle part of the anchor to easily bulge, resulting in uneven stress distribution on the carbon fiber plate. The stress is concentrated at both ends of the carbon fiber plate, and the carbon fiber plate is prone to splitting damage. Utility Model Content

[0005] In order to improve the problems existing in the above-mentioned technology, the present application provides a concave carbon fiber plate anchoring device.

[0006] The present application provides a concave surface carbon fiber plate anchoring device adopts the following technical solution:

[0007] A concave carbon fiber plate anchoring device comprises an anchor seat and an anchor block, wherein the anchor seat is provided with a slot for inserting the anchor block, one side of the anchor block is a pressing portion fitted with the inner wall of the slot, and the other side is a contact portion fitted with the carbon fiber plate, and the cross section of the pressing portion is a concave surface with a low middle portion and high two ends.

[0008] By adopting the above technical solution, when anchoring the carbon fiber plate, the end of the carbon fiber plate is extended into the slot from the front port of the slot, and then the end of the carbon fiber plate is covered with an anchor block, and then the anchor block is pushed into the slot from the rear port of the slot. The anchor block presses the end of the carbon fiber plate into the slot, thereby completing the anchoring of the carbon fiber plate.

[0009] One side of the anchor block is a contact portion that fits with the carbon fiber plate, and the other side is a pressing portion that fits with the inner wall of the slot. Since the cross-section of the pressing portion is a concave surface with a low middle portion and high two ends, such an arrangement can change the force transmission method between the anchor block and the anchor seat and between the anchor block and the carbon fiber plate. When the anchor block is subjected to force, the middle part of the anchor block is subjected to greater pressure and is not prone to arching, thereby avoiding stress concentration at both ends of the carbon fiber plate and making the force more concentrated in the middle of the anchor block. The entire force direction is dispersed toward both ends of the anchor block, thereby making the stress distribution on the carbon fiber plate more uniform and the anchoring effect of the anchoring device better.

[0010] Optionally, two anchor blocks are provided, the two anchor blocks are arranged opposite to each other, and the carbon fiber plate is clamped between the two anchor blocks.

[0011] By adopting the above technical solution, the two anchor blocks work together to clamp the carbon fiber plate between the two anchor blocks, and the two anchor blocks act on both sides of the carbon fiber plate respectively, so that the forces on both sides of the carbon fiber plate can be balanced.

[0012] Optionally, the thickness of the anchor block gradually decreases from one end to the other end.

[0013] By adopting the above technical solution, when the end of the carbon fiber plate is fixed in the slot, the tension end of the carbon fiber plate is located on the side of the end of the anchor block with a smaller thickness. The setting of the gradually decreasing thickness of the anchor block from one end to the other end enables the anchor block to lock the carbon fiber plate tighter and tighter when the carbon fiber plate is subjected to tension, thereby improving the anchoring effect of the anchoring device.

[0014] Optionally, anti-slip teeth are provided on the contact portion.

[0015] By adopting the above technical solution, the anti-skid gear is arranged on the contact part to increase the friction between the anchor block and the carbon fiber plate, thereby improving the stability of the end of the carbon fiber plate when it is located in the anchor seat and improving the anchoring effect.

[0016] Optionally, two ends of the pressing portion are mirror-imaged along the central axis of the anchor block.

[0017] By adopting the above technical solution, since the two ends of the pressing part are mirror-imaged along the central axis of the anchor block, the pressing part as a whole is symmetrically distributed around the central axis, thereby balancing the pressure on both sides of the anchor block, thereby improving the uniformity of stress distribution on the carbon fiber plate.

[0018] Optionally, the cross section of the pressing portion transitions from a middle portion to two ends of a circular arc.

[0019] By adopting the above technical solution, since the cross-section of the pressing part transitions from the middle to the two ends in a circular arc, the height of the pressing part can change gradually and smoothly from the middle to the two ends. When the anchor block is under pressure, the pressure acting on the pressing part will not differ greatly in a certain area, thereby making the stress distribution on the carbon fiber plate more uniform.

[0020] Optionally, positioning steps are provided at both ends of the pressing portion.

[0021] By adopting the above technical solution, the positioning steps at both ends of the pressing part are used to position the anchor block in the slot, which facilitates the insertion of the anchor block into the slot, and the setting of the two positioning steps is conducive to the middle part of the pressing part with the lowest height being in the middle position of the anchoring device, avoiding the position of the middle part of the pressing part from being offset.

[0022] Optionally, a connection between the positioning step and the pressing portion is chamfered.

[0023] By adopting the above technical solution, the chamfered setting makes the connection between the positioning step and the pressing part present an arc transition, thereby avoiding the stress acting on the anchor block from suddenly dropping at the connection between the positioning step and the pressing part, thereby improving the uniformity of stress distribution on the anchor block.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. When anchoring the carbon fiber plate, extend the end of the carbon fiber plate into the slot from the front port of the slot, then use the anchor block to cover the end of the carbon fiber plate, and then push the anchor block into the slot from the rear port of the slot. The anchor block presses the end of the carbon fiber plate into the slot, thereby completing the anchoring of the carbon fiber plate. One side of the anchor block is a contact portion that fits with the carbon fiber plate, and the other side is a pressing portion that fits with the inner wall of the slot. Since the cross-section of the pressing portion is a concave surface with a low middle part and high ends, such a setting can change the force transmission method between the anchor block and the anchor seat and between the anchor block and the carbon fiber plate. During the force-bearing process of the anchor block, the middle part of the anchor block is under greater pressure and is not easy to bulge, thereby avoiding stress concentration at both ends of the carbon fiber plate, making the force more concentrated in the middle of the anchor block, and the entire force direction is dispersed to both ends of the anchor block, so that the stress distribution on the carbon fiber plate is more uniform, and the anchoring effect of the anchoring device is better;

[0026] 2. When the end of the carbon fiber plate is fixed in the slot, the tension end of the carbon fiber plate is located on one side of the front end of the anchor block. The thickness of the anchor block gradually decreases from the rear end to the front end, so that when the carbon fiber plate is subjected to tension, the anchor block can lock the carbon fiber plate more and more tightly, thereby improving the anchoring effect of the anchoring device;

[0027] 3. The anti-slip gear is arranged on the contact part to increase the friction between the anchor block and the carbon fiber plate, thereby improving the stability of the end of the carbon fiber plate when it is located in the anchor seat and improving the anchoring effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a concave carbon fiber plate anchoring device in an embodiment of the present application;

[0029] Figure 2 is a side view of an embodiment of the present application;

[0030] Figure 3 is a cut-away side view of an embodiment of the present application;

[0031] Figure 4 is a schematic diagram of an anchor block in an embodiment of the present application;

[0032] Figure 5 It is a schematic diagram of the state of the anchor seat under force in other embodiments.

[0033] Explanation of the accompanying drawings: 1. Anchor seat; 1a. Front end of anchor seat; 1b. Rear end of anchor seat; 2. Anchor block; 2a. Front end of anchor block; 2b. Rear end of anchor block; 3. Slot; 3a. Front port of slot; 3b. Rear port of slot; 4. Pressing part; 5. Contact part; 6. Positioning step; 7. Carbon fiber plate. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] The present application embodiment discloses a concave carbon fiber plate anchoring device. Figure 1 and Figure 2 The concave surface carbon fiber plate anchoring device comprises an anchor seat 1 and two anchor blocks 2. A slot 3 is provided on the anchor seat 1. The slot 3 is used for inserting two anchor blocks 2 at the same time. One side of the anchor block 2 is a pressing portion 4 that fits with the inner wall of the slot 3, and the other side is a contact portion 5 that fits with the carbon fiber plate 7. The cross section of the pressing portion 4 is a concave surface with a low middle portion and high two ends. The two anchor blocks 2 are arranged opposite to each other, and the carbon fiber plate 7 is clamped between the two anchor blocks 2.

[0036] Reference Figure 3 and Figure 4The anchor block 2 is in the shape of a wedge, the thickness of which gradually decreases from the rear end 2b of the anchor block to the front end 2a of the anchor block. The slot 3 is in the shape of a tapered hole, and the cross section along the direction from the rear end 1b of the anchor seat to the front end 1a of the anchor seat gradually decreases to adapt to the shape of the anchor block 2. When anchoring the carbon fiber plate 7, the end of the carbon fiber plate 7 is extended into the slot 3 from the front end 3a of the slot, and then the end of the carbon fiber plate 7 is covered with the anchor block 2, and then the anchor block 2 is pushed into the slot 3 from the rear end 3b of the slot. The tension end of the carbon fiber plate 7 is located on one side of the front end 1a of the anchor seat, and the groove wall of the tapered slot 3 generates friction force on the inclined surface of the anchor block 2 to prevent the anchor block 2 from retracting. At the same time, the anchor block 2 generates an extrusion force on the carbon fiber plate 7, and friction force is generated between the anchor block 2 and the carbon fiber plate 7, so that when the carbon fiber plate 7 is subjected to tension, the anchor block 2 can lock the carbon fiber plate 7 tighter and tighter, thereby improving the anchoring effect of the anchoring device.

[0037] In an embodiment of the present application, the length of the anchor block 2 is equal to that of the anchor seat 1. When the anchor block 2 is inserted into the slot 3, the two end faces of the anchor block 2 and the two end faces of the anchor seat 1 are in the same plane; in other embodiments, the length of the anchor block 2 is slightly longer than that of the anchor seat 1. When the anchor block 2 is inserted into the slot 3, the front end of the anchor block 2 slightly protrudes from the slot 3, and a chamfer is provided on the side of the front end 2a of the anchor block close to the carbon fiber plate 7, thereby reducing the shear thickness of the protruding part of the tensile end of the carbon fiber plate 7, improving the notch effect, reducing the stress concentration at the end of the anchor block 2, and ensuring the uniformity of the anchor block 2 clamping the carbon fiber plate 7.

[0038] Reference Figure 2 and Figure 3 The contact parts 5 of the two anchor blocks 2 are both flat, and anti-slip teeth are fixed on the contact parts 5. When the two anchor blocks 2 clamp the ends of the carbon fiber plate 7, the anti-slip teeth fit with the carbon fiber plate 7, thereby increasing the friction and mechanical bite force of the contact part 5, effectively preventing the carbon plate from slipping, and improving the stability of the end of the carbon fiber plate 7 when it is located in the anchor seat 1.

[0039] In the embodiment of the present application, the anti-skid tooth pattern is a plurality of transverse anti-skid teeth distributed along the width direction of the carbon fiber plate 7, and the plurality of transverse anti-skid teeth are parallel to each other and have the same size.

[0040] Reference Figure 4The cross section of the pressing part 4 transitions from the middle to the bottom arc of the positioning steps 6 at both ends, and the two ends of the pressing part 4 are mirrored along the central axis of the anchor block 2; the two ends of the pressing part 4 are provided with positioning steps 6, and the connection between the positioning steps 6 and the pressing part 4 is provided with a chamfer. The positioning steps 6 at both ends of the pressing part 4 are used to position the anchor block 2 in the slot 3, which is convenient for the anchor block 2 to be inserted into the slot 3, and the setting of the two positioning steps 6 is conducive to the middle part of the pressing part 4 with the lowest height being in the middle position of the anchoring device, avoiding the position of the middle part of the pressing part 4 from being offset; the chamfer can make the connection between the positioning step 6 and the pressing part 4 transition in an arc, avoiding the stress acting on the anchor block 2 from suddenly dropping in steps at the connection between the positioning step 6 and the pressing part 4, and improving the uniformity of stress distribution on the anchor block 2.

[0041] In other embodiments, reference Figure 5 The cross section of the pressing part 4 can be directly transitioned from the middle to the arcs at both ends, so that the height of the pressing part 4 always shows a gradual and gentle change trend from the middle to the two ends. When the anchor block 2 is compressed, the pressure acting on the pressing part 4 will not differ greatly in a certain area, thereby making the stress distribution on the carbon fiber plate 7 more uniform.

[0042] In the embodiment of the present application, two anchor blocks 2 are selected, and the two anchor blocks 2 work together to clamp the carbon fiber plate 7; in other embodiments, one anchor block 2 can be used, and the pressing portion 4 on one side of the anchor block 2 is in contact with the inner wall of the upper side of the slot 3, and the contact portion 5 on the other side is in contact with the carbon fiber plate 7, and one side of the carbon fiber plate 7 is in contact with the inner wall of the lower side of the slot 3. The anchor block 2 presses the carbon fiber plate 7, and the anchor block 2 and the slot 3 cooperate to fix the carbon fiber plate 7 in the slot 3.

[0043] The implementation principle of a concave surface carbon fiber plate anchoring device of an embodiment of the present application is: when anchoring the carbon fiber plate 7, the end of the carbon fiber plate 7 is extended into the slot 3 from the front port 3a of the slot, and then the end of the carbon fiber plate 7 is covered with the anchor block 2, and then the anchor block 2 is pushed into the slot 3 from the rear port 3b of the slot. The anchor block 2 presses the end of the carbon fiber plate 7 into the slot 3, thereby completing the anchoring of the carbon fiber plate 7.

[0044] One side of the anchor block 2 is a contact portion 5 that fits with the carbon fiber plate 7, and the other side is a pressing portion 4 that fits with the inner wall of the slot 3. Since the cross-section of the pressing portion 4 is a concave surface with a low middle portion and high two ends, such a setting can change the force transmission method between the anchor block 2 and the anchor seat 1 and between the anchor block 2 and the carbon fiber plate 7. When the anchor block 2 is subjected to force, the middle part of the anchor block 2 is subjected to greater pressure and is not prone to arching, thereby avoiding stress concentration at both ends of the carbon fiber plate 7, making the force more concentrated in the middle of the anchor block 2, and the entire force direction is dispersed toward the two ends of the anchor block 2, so that the stress distribution on the carbon fiber plate 7 is more uniform, and the anchoring effect of the anchoring device is better.

[0045] It is difficult for conventional anchors to ensure the anchoring efficiency for thin and wide carbon fiber plates (100 mm wide × 1.4 mm thick), but the concave carbon fiber plate anchoring device involved in the present application can also ensure an anchoring efficiency of more than 95% for thin and wide carbon fiber plates (100 mm wide × 1.4 mm thick).

[0046] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A concave carbon fiber plate anchoring device, characterized in that: The invention comprises an anchor seat (1) and an anchor block (2), wherein a slot (3) is provided on the anchor seat (1), and the slot (3) is used for inserting the anchor block (2); one side of the anchor block (2) is a pressing portion (4) which is in contact with the inner wall of the slot (3), and the other side is a contact portion (5) which is in contact with a carbon fiber plate (7); the cross section of the pressing portion (4) is a concave surface which is low in the middle and high at both ends.

2. The concave carbon fiber plate anchoring device according to claim 1, characterized in that: Two anchor blocks (2) are provided, the two anchor blocks (2) are arranged opposite to each other, and the carbon fiber plate (7) is clamped between the two anchor blocks (2).

3. The concave carbon fiber plate anchoring device according to claim 1, characterized in that: The thickness of the anchor block (2) gradually decreases from one end to the other end.

4. The concave carbon fiber plate anchoring device according to claim 1, characterized in that: The contact portion (5) is provided with anti-slip teeth.

5. The concave carbon fiber plate anchoring device according to claim 1, characterized in that: The two ends of the pressing portion (4) are arranged in a mirror image along the central axis of the anchor block (2).

6. The concave carbon fiber plate anchoring device according to claim 1, characterized in that: The cross section of the pressing portion (4) transitions from the middle portion to the two ends in a circular arc.

7. The concave carbon fiber plate anchoring device according to claim 1, characterized in that: Positioning steps (6) are provided at both ends of the pressing portion (4).

8. The concave carbon fiber plate anchoring device according to claim 7, characterized in that: A chamfer is provided at the connection between the positioning step (6) and the pressing portion (4).

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