A large-tonnage prestressed carbon fiber plate tensioning tool

Abstract

This utility model relates to the field of carbon fiber plate reinforcement technology, and in particular to a large-tonnage prestressed carbon fiber plate tensioning tool. Addressing the problems of high frictional resistance and lack of emergency self-locking mechanisms in existing prestressed carbon fiber plate twin-screw anchor tensioning devices, this utility model proposes a large-tonnage prestressed carbon fiber plate tensioning tool comprising a tensioning base plate and a baffle; an anchoring mechanism is provided on the tensioning base plate; a tensioning mechanism is provided between the anchoring mechanism and the baffle; and two locking mechanisms are correspondingly provided on the baffle. The locking mechanism includes multiple locking pins; each locking pin is connected to a stop block by an elastic element. The locking mechanism also includes multiple ropes and a mounting block located at the rear end of the baffle; a pull rod for pulling the ropes is movably connected to the mounting block. The large-tonnage prestressed carbon fiber plate tensioning tool of this utility model can lock and unlock the tensioning screw through the locking pins and elastic elements, and can also reduce sliding friction through a sliding rail.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber plate reinforcement technology, and in particular to a tensioning tool for large-tonnage prestressed carbon fiber plates. Background Technology

[0002] With the continuous upgrading and renovation of infrastructure construction, the demand for strengthening existing structures is increasing. Traditional reinforcement methods, such as increasing concrete cross-sections and bonding steel plates, are gradually being replaced by new materials and processes due to their heavy weight and complex construction. Among them, carbon fiber reinforced polymer (CFRP) composites, with their advantages of high strength, lightweight, and corrosion resistance, have been widely used in reinforcement projects in bridges, buildings, and other fields. However, the efficient application of carbon fiber plates relies on precise prestressing technology. Traditional prestressing tensioning devices face many challenges when handling large-tonnage carbon fiber plates, such as insufficient tension force, uneven stress distribution, and inconvenient operation. Therefore, developing a tensioning tool suitable for large-tonnage prestressed carbon fiber plates is key to solving these problems.

[0003] Chinese patent CN213015528U discloses a prestressed carbon fiber plate twin-screw tool anchor tensioning device, including a tensioning base plate and a baffle fixedly installed on the tensioning base plate. In the implementation of this utility model, one end of the carbon fiber plate is installed externally using a fixed anchor, and the other end is installed on the I-shaped anchoring device of this utility model, bonded and pressed into the clamping area. After adjusting the position of the baffle, the second self-locking nut and the first self-locking nut at the baffle are locked. Stress is applied between the baffle and the baffle by a jack, which drives the tensioning screw to tension the upper and lower anchor plates. After the tension requirement is reached, the third locking nut is locked.

[0004] However, the above-mentioned prestressed carbon fiber plate twin screw tool anchor tensioning device still has the following problems when used: (1) The prestressed carbon fiber plate twin screw tool anchor tensioning device does not specify whether there are auxiliary sliding structures such as rollers, sliders or guide rails. The frictional resistance is large during the sliding process, which affects the tensioning accuracy; (2) Once the jack loses pressure or the hydraulic system fails, the tension force may be suddenly released. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a high-tonnage prestressed carbon fiber plate tensioning tool. On the one hand, the tensioning screw can be locked and unlocked through the locking post and elastic element; on the other hand, sliding friction is reduced through the slide rail and ball bearings.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This application provides a high-tonnage prestressed carbon fiber plate tensioning tool, including a tensioning base plate and a baffle fixedly mounted on the tensioning base plate; the tensioning base plate is provided with an anchoring mechanism for fixing the carbon fiber plate; a tensioning mechanism for providing tension force is provided between the anchoring mechanism and the baffle; and two locking mechanisms are correspondingly provided on the baffle for locking the tensioned state after the tensioning mechanism reaches the target tension force.

[0008] Furthermore, the anchoring mechanism includes two slide rails symmetrically arranged on the tensioning base plate; an anchoring plate is slidably connected between the two slide rails; and the anchoring plate has a slot for fixing the end of the carbon fiber plate.

[0009] Furthermore, the tensioning mechanism includes two tensioning screws; both tensioning screws pass through the anchor plate and the baffle, and are fitted with fixing plates at their ends; a jack is connected between the fixing plate and the baffle.

[0010] Furthermore, the locking mechanism includes a plurality of locking pins that are threadedly engaged with the tensioning screw; each locking pin is slidably connected within the baffle along the axial direction of the locking pin; and an elastic element is connected between the locking pin and the baffle.

[0011] Furthermore, the locking mechanism also includes multiple ropes corresponding to the locking pins, and a mounting block disposed at the rear end of the baffle; a pull rod for pulling the ropes is movably connected to the mounting block.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. By setting a locking mechanism, once the tensioning mechanism reaches the target tension force, the locking post quickly locks onto the tensioning screw under the action of the elastic element, achieving mechanical locking. This prevents tension release due to hydraulic system depressurization, providing the first layer of mechanical locking protection and improving safety during tensioning. Pulling the lever controls the rope to disengage the locking post from the tensioning screw, completing the unlocking operation. Simultaneously, because the lever and mounting block are threaded, the lever remains self-locking even without manual rotation, improving the ease of operation and safety for construction personnel, especially suitable for high-altitude or confined space operations. The interplay between the anchor plate and the slide rail ensures greater stability during sliding, guaranteeing uniform force distribution during carbon fiber plate tensioning.

[0014] 2. The tensioning base plate serves as the foundation platform. Components such as baffles, slide rails, and anchor plates are all detachable or slidingly connected. The high degree of modularity facilitates transportation, on-site assembly, and reuse, enhancing the equipment's portability and adaptability. It is particularly suitable for complex working environments such as bridge, tunnel, and building reinforcement. The carbon fiber plate is embedded into the anchor plate through slots. Multiple toothed strips are located within the slots, further secured by reinforcement components (such as clamping bolts or clamps). This double-fixing structure effectively prevents the carbon fiber plate from slipping or breaking during tensioning, enhancing anchoring stability and ensuring no displacement or anchorage failure occurs during tensioning, thus improving construction safety. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is a schematic diagram of the mounting block in this utility model;

[0019] Figure 4 This is a partial cross-sectional view of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the locking post, elastic element, rope, and pull rod in this utility model.

[0021] In the diagram: 1-Tensioning base plate; 11-Through hole; 12-Reinforcing rib; 13-Limiting plate; 2-Baffle; 3-Anchoring mechanism; 31-Slide rail; 32-Anchoring plate; 321-Slot; 33-Reinforcing component; 34-First fastening bolt; 4-Tensioning mechanism; 41-Tensioning screw; 42-Fixing plate; 43-Jack; 44-Second fastening bolt; 5-Locking mechanism; 51-Clamping post; 52-Elastic component; 53-Rope; 54-Mounting block; 55-Tie rod. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Combination Figure 1-5 As shown, this utility model provides a high-tonnage prestressed carbon fiber plate tensioning tool, including a tensioning base plate 1 and a baffle 2 fixedly mounted on the tensioning base plate 1; the tensioning base plate 1 is provided with an anchoring mechanism 3 for fixing the carbon fiber plate; a tensioning mechanism 4 for providing tension force is provided between the anchoring mechanism 3 and the baffle 2; and two locking mechanisms 5 are correspondingly provided on the baffle 2 for locking the tensioned state after the tensioning mechanism 4 reaches the target tension force.

[0026] Specifically, the tensioning base plate 1 serves as the foundation platform for the entire tensioning tool, supporting all components. Multiple through holes 11 are symmetrically arranged on both sides of the tensioning base plate 1, used to connect it to a bridge or other carrier. A baffle 2 is located at one end of the tensioning base plate 1, with reinforcing ribs 12 connecting it to both sides for mounting the locking mechanism 5 and acting as a reaction support to bear the tension force. Both the tensioning base plate 1 and the baffle 2 are made of Q345 steel plate, which is high-strength, pressure-resistant, and has good weldability. The anchoring mechanism 3 enables rapid clamping of the carbon fiber plate, ensuring stable tensioning and preventing slippage or displacement during tensioning. The tensioning mechanism 4 provides controllable tension force, and the locking mechanism 5 ensures stable tension and prevents rebound.

[0027] Furthermore, the anchoring mechanism 3 includes two slide rails 31 symmetrically arranged on the tensioning base plate 1; an anchoring plate 32 is slidably connected between the two slide rails 31; the anchoring plate 32 is provided with a slot 321 for fixing the end of the carbon fiber plate, and is provided with a plurality of reinforcement parts 33 for further reinforcement.

[0028] Both sides of the anchor plate 32 are provided with sliding parts that match the slide rail 31, and multiple ball bearings are provided on the arc-shaped surface of the sliding parts. The multiple ball bearings are arranged in a straight line on the corresponding arc-shaped surface, which improves the smoothness of the sliding of the anchor plate 32. At the same time, the slide rail 31 clamps the two sides of the anchor plate 32, making the anchor plate 32 move more smoothly and thus tensioning the carbon fiber plate more stably. The slot 321 is opened at both ends on the anchor plate 32, and multiple toothed strips are provided inside the slot 321. The toothed strips are made of rubber. When the end of the carbon fiber plate is inserted into the slot 321, it will squeeze the multiple toothed strips. The reaction force of the toothed strips will further increase the friction, thus clamping the carbon fiber plate more firmly. Reinforcing members 33 are arranged in pairs on both sides of the slot 321, and the reinforcing members 33 are specifically bolts. Their function is to transfer the stress on the anchor plate 32 and prevent damage or deformation of the slot 321. The slot 321 is cross-shaped, and a reinforcing plate is provided on the upper side of the slot 321 perpendicular to the carbon fiber plate. When the bolts of several pairs of reinforcing members 33 are installed on the anchor plate 31, they will press down on the reinforcing plate, thereby attaching the reinforcing plate to the carbon fiber plate and fixing the carbon fiber plate. A limiting plate 13 is also provided between the two slide rails 31. Reinforcing ribs 12 are connected between the two sides of the limiting plate 13 and the tensioning base plate 1. The carbon fiber plate passes through the limiting plate 13 and is inserted into the slot 321. The function of the limiting plate 13 is to prevent the carbon fiber plate from bending during the tensioning process.

[0029] Furthermore, the tensioning mechanism 4 includes two tensioning screws 41; both tensioning screws 41 pass through both sides of the anchor plate 32 and the baffle 2, and are fitted with fixing plates 42 at their ends; a jack 43 is connected between the fixing plate 42 and the baffle 2.

[0030] Each of the two tensioning bolts 41 has a first fastening bolt 34 at one end penetrating the anchor plate 32, and a first fastening bolt 34 is also provided on the corresponding side of the anchor plate 32, for connecting and fastening the tensioning bolts 41 to the anchor plate 32. The other ends of the two tensioning bolts 41 penetrate the baffle 2 and are provided with second fastening bolts 44 near the baffle 2. At the same time, the ends of the two tensioning bolts 41 penetrate the fixing plate 42 and are fastened to the fixing plate 42 through the second fastening bolts 44. The fixed end of the jack 43 is sleeved on the baffle 2, and the movable end is sleeved on the fixing plate 42.

[0031] Furthermore, the locking mechanism 5 includes a plurality of locking pins 51 that are threadedly engaged with the tensioning screw 41; each locking pin 51 is slidably connected to the baffle 2 along the axial direction of the locking pin 51; and an elastic element 52 is connected between the locking pin 51 and the baffle 2.

[0032] One end of the locking post 51 is provided with an angled bevel that engages with the thread on the tensioning screw 41, and multiple locking posts 51 can only move upward along their own axial direction and cannot move in other directions. One end of the elastic element 52 is connected to the locking post 51, and the other end is connected to the baffle 2. When the tensioning screw 41 moves and passes through the angled bevel, it can squeeze the locking post 51. When the tensioning screw 41 stops moving, the locking post 51 is squeezed by the spring, causing the angled bevel to engage with the thread. At this time, the tensioning screw 41 cannot move in the opposite direction, thus preventing the carbon fiber plate from unexpectedly rebounding.

[0033] Furthermore, the locking mechanism 5 also includes multiple ropes 53 corresponding one-to-one with the locking posts 51, and a mounting block 54 disposed at the rear end of the baffle 2; a pull rod 55 for pulling the ropes 53 is movably connected to the mounting block 54. The baffle 2 has a sliding groove for the locking posts 51 to slide in, and a groove for embedding the ropes 53. The locking posts 51 can only slide along their axial direction in the sliding groove, and the ropes 53 can only move along the groove.

[0034] To meet different usage requirements, an unlocking mechanism for the locking posts 51 was designed. Each locking post 51 is connected to a rope 53, and the end of each rope 53 away from the locking post 51 passes through the rear side of the baffle 2, corresponding to two tensioning screws 41. Two mounting blocks 54 are used, both fixedly mounted on the rear side of the baffle 2. Pull rods 55 are threadedly connected to the mounting blocks 54. The end of each rope 53 passing through the baffle 2 is connected to the corresponding pull rod 55, and each rope 53 is taut between the corresponding pull rod 55 and the locking post 51.

[0035] Working principle: When in use, start the jack 43 to push the fixed plate 42 to move backward, which drives the two tensioning screws 41 to move backward. The tensioning screws 41 drive the anchor plate 32 to slide along the slide rail 31 and tension the carbon fiber plate at the same time. When the jack 43 stops, the angle of the locking post 51 engages with the thread of the tensioning screw 41, thereby locking the position of the tensioning screw 41 and the state of the carbon fiber plate. When it is necessary to release the carbon fiber plate, rotate the pull rod 55 so that the rope 53 pulls the locking post 51 away from the tensioning screw 41, and start the jack 43 to retract.

[0036] Specific application examples

[0037] A large-tonnage prestressed carbon fiber plate tensioning tool is used for bridge reinforcement. For aging bridges or those with insufficient load-bearing capacity, carbon fiber plates are bonded and tensioned in key areas such as piers and bridge decks to enhance their load-bearing capacity and durability. It is also used for building structure reinforcement, particularly in earthquake-prone areas, where prestressed carbon fiber plates are applied to key structural components such as beams and columns to improve the overall stability of buildings. Furthermore, it is used for underground engineering lining reinforcement, such as subway tunnels and underground parking lots. When cracks or other damage are found in the existing concrete lining, this equipment is used to prestress the carbon fiber plates to repair and strengthen the lining structure.

[0038] This utility model provides a tensioning tool for large-tonnage prestressed carbon fiber plates. The specific operation process of this device is as follows:

[0039] Install the tensioning base plate 1 and ensure that it is placed stably and firmly on the working surface; fix the baffle 2 to one end of the tensioning base plate 1, check whether the connection between it and the tensioning base plate 1 is secure, and then install the reinforcing rib 12.

[0040] Adjust the position of the slide rail 31 according to the size of the carbon fiber plate, and correctly install the anchor plate 32 onto the slide rail 31; use the slot 321 to accurately fix the end of the carbon fiber plate to ensure that it will not slip or fall off during tensioning.

[0041] Adjust the tensioning screw 41 to pass through the anchor plate 32 and the baffle 2 to ensure uniform force at both ends; fit the fixing plate 42 at the rear end of the tensioning screw 41 and connect the jack 43 between the fixing plate 42 and the baffle 2; start the jack 43 and slowly increase the pressure until the predetermined tension value is reached; during the tensioning process, the locking post 51 is lifted up. When the target tension is reached, under the action of the elastic element 52, the locking post 51 is pushed to engage with the thread of the tensioning screw 41 to prevent the tensioning screw 41 from rebounding in the event of jack 43 failure. If it is necessary to unlock the locking post 51, rotate the pull rod 55. The pull rod 55 rotates and moves outward from the mounting block 54, thereby pulling the rope 53 and causing the locking post 51 to disengage from the tensioning screw 41.

[0042] In summary, although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A high-tonnage prestressed carbon fiber plate tensioning tool, comprising a tensioning base plate (1) and a baffle (2) fixedly disposed on the tensioning base plate (1); characterized in that, The tensioning base plate (1) is provided with an anchoring mechanism (3) for fixing the carbon fiber plate. A tensioning mechanism (4) for providing tension force is provided between the anchoring mechanism (3) and the baffle (2). The baffle (2) is provided with two locking mechanisms (5) for locking the tensioning state after the tensioning mechanism (4) reaches the target tension.

2. The large tonnage prestressed carbon fiber sheet tensioning tool of claim 1, wherein, The anchoring mechanism (3) includes two slide rails (31) symmetrically arranged on the tensioning base plate (1). An anchor plate (32) is slidably connected between the two slide rails (31); The anchor plate (32) has a slot (321) for fixing the end of the carbon fiber plate.

3. The large tonnage prestressed carbon fiber sheet tensioning tool of claim 2, wherein, The tensioning mechanism (4) includes two tensioning screws (41). Both tensioning bolts (41) pass through the anchor plate (32) and the baffle (2), and are fitted with fixing plates (42) at their ends. A jack (43) is connected between the fixing plate (42) and the baffle (2).

4. The large tonnage prestressed carbon fiber sheet tensioning tool of claim 3, wherein, The locking mechanism (5) includes a plurality of locking pins (51) that are threadedly engaged with the tensioning screw (41). Each of the said pins (51) is slidably connected within the baffle (2) along the axial direction of the pin (51); and an elastic element (52) is connected between the pin (51) and the baffle (2).

5. The large tonnage prestressed carbon fiber sheet tensioning tool of claim 4, wherein, The locking mechanism (5) also includes multiple ropes (53) corresponding one-to-one with the locking pins (51), and a mounting block (54) disposed at the rear end of the baffle (2). A lever (55) for pulling the rope (53) is movably connected to the mounting block (54).

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