Prestressed carbon fiber cloth tensioning machine

Abstract

The utility model relates to the technical field of carbon fiber cloth, in particular to a prestressed carbon fiber cloth tensioning machine. Comprising a bottom plate, four supporting frames are fixedly connected to the top of the bottom plate, a supporting plate is fixedly connected to the tops of the four supporting frames, a carbon fiber cloth storage plate is installed at the bottom end of the supporting plate, and pressing assemblies used for conducting prestress pressurization on carbon fiber cloth are installed on the two sides of the interior of the carbon fiber cloth storage plate; the bottom of the carbon fiber cloth storage plate is connected with an attaching assembly used for adjusting the distance between the carbon fiber cloth and the concrete. Carbon fiber cloth wound in the middle of the carbon fiber cloth storage plate can be subjected to prestress stretching through the pressure applying assemblies installed at the two ends of the interior of the carbon fiber cloth storage plate, and meanwhile the carbon fiber cloth storage plate can be integrally lifted through the attaching assemblies arranged at the bottom of the carbon fiber cloth storage plate; and the carbon fiber cloth can be conveniently attached to the bottom of the concrete slab in a stretched state, and the using effect of the carbon fiber cloth is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber cloth, in particular to a prestressed carbon fiber cloth tensioning machine. Background Art

[0002] Carbon fiber cloth has the characteristics of high strength, light weight, fire resistance and corrosion resistance. It is an ideal material for reinforcing concrete bending members and can be widely used in bridges and civil buildings. In order to give full play to the high tensile strength of carbon fiber cloth, the carbon fiber cloth is pasted on the surface of concrete components under prestressing conditions, which can effectively improve the utilization rate of carbon fiber cloth. There are many existing technologies for carbon fiber cloth prestressing tensioning devices:

[0003] For example, the Chinese patent publication number is CN205476518U, which is a prestressed carbon fiber tensioning device, including an anchoring frame, a tensioning mechanism and a force-applying device, the carbon fiber cloth is fixedly arranged on the tensioning mechanism, the tensioning mechanism is installed on the anchoring frame, and the force-applying device applies prestress to the carbon fiber cloth through the tensioning mechanism. The prestressed carbon fiber tensioning device in the utility model applies prestress to the carbon fiber cloth before it is pasted to the concrete beam, and pastes the carbon fiber cloth to the bottom of the concrete beam while keeping the prestress unchanged, so as to reinforce the concrete beam, make the carbon fiber cloth evenly stressed, and achieve good tensioning effect; at the same time, the structure is simple, integrating tensioning and anchoring devices, easy to operate, and easy to promote and use;

[0004] Nowadays, when prestressing carbon fiber cloth, a certain distance needs to be maintained between the carbon fiber cloth and the concrete to facilitate the application of epoxy resin primer on the surface of the carbon fiber cloth after pressure is applied. After the pressure is applied, the distance between the carbon fiber cloth and the concrete needs to be adjusted so that the carbon fiber cloth can adhere to the surface of the concrete. The current carbon fiber cloth prestressing tensioning machine uses a sleeve to adjust the distance between the carbon fiber cloth and the concrete, and the sleeve is manually adjusted. When adjusting, it is easy to make the tensioned carbon fiber cloth in an unbalanced state, which affects the tensioning stability of the carbon fiber cloth to a certain extent. In view of this, we propose a prestressed carbon fiber cloth tensioning machine. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned shortcomings and provide a prestressed carbon fiber cloth tensioning machine which can lift the carbon fiber cloth storage plate as a whole by setting a bonding component at the bottom of the carbon fiber cloth storage plate, so as to facilitate bonding the carbon fiber cloth to the bottom of the concrete slab in a stretched state.

[0006] By means of the fitting component arranged at the bottom of the carbon fiber cloth storage plate, the carbon fiber cloth storage plate can be lifted as a whole, so that it can be fitted to the bottom of the concrete slab in a stretched state of the carbon fiber cloth, thereby improving the use effect of the carbon fiber cloth. At the same time, by means of the pressure components installed at both ends of the carbon fiber cloth storage plate, the carbon fiber cloth wrapped in the middle of the carbon fiber cloth storage plate can be subjected to bidirectional prestressed stretching, thereby improving the tensioning effect of the carbon fiber cloth.

[0007] Therefore, the utility model provides a prestressed carbon fiber cloth tensioning machine, which includes a base plate, the top of the base plate is fixedly connected to four support frames, the tops of the four support frames are fixedly connected to support plates for supporting concrete slabs, and the support plates are hollow structures at the bottom, a carbon fiber cloth storage plate is installed at the bottom end of the support plate, pressure components for prestressing the carbon fiber cloth are installed on both sides of the interior of the carbon fiber cloth storage plate, and a fitting component for adjusting the distance between the carbon fiber cloth and concrete is fixedly connected to the bottom of the carbon fiber cloth storage plate.

[0008] As a further improvement of the present technical solution, the bonding assembly includes four cylinders installed on the top of the base plate, the interiors of the four cylinders are movably connected with piston rods, the bottom of the carbon fiber cloth storage plate is fixedly connected with four connecting parts, and the ends of the four piston rods away from the cylinders are respectively connected to the four connecting parts.

[0009] As a further improvement of the present technical solution, the pressure-applying assembly includes rotating shafts installed at both ends of the middle part of the carbon fiber cloth storage plate, and winding shafts are fixedly installed on the surfaces of the two rotating shafts. One end of the two rotating shafts is respectively fixedly connected to the output shaft of the motor, and the two motors are respectively installed on the surface of the carbon fiber cloth storage plate.

[0010] As a further improvement of the present technical solution, two groups of limit clamps are installed in the middle of the carbon fiber cloth storage plate, and the two groups of limit clamps are respectively located at one end of the two winding shafts close to the middle of the carbon fiber cloth storage plate. The two groups of limit clamps are formed by splicing the upper end plate and the lower end plate, and a clamping hole is formed between the upper end plate and the lower end plate.

[0011] As a further improvement of the technical solution, a mounting groove is provided at the bottom end of the upper end plate, a mounting hole is provided in the middle of the lower end plate, a threaded rod is threadedly installed between the mounting groove and the mounting hole, and a fixing ring is rotatably provided on the outer wall of the lower end of the threaded rod.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the prestressed carbon fiber cloth tensioning machine, four support frames are arranged on the top of the bottom plate, so that the support plate supporting the concrete plate can be stably installed, and the pressure components installed at the two ends of the carbon fiber cloth storage plate can be used to prestress the carbon fiber cloth wrapped around the middle of the carbon fiber cloth storage plate. At the same time, the bonding component arranged at the bottom of the carbon fiber cloth storage plate can lift the carbon fiber cloth storage plate as a whole, so that it is convenient to bond the carbon fiber cloth to the bottom of the concrete plate in the stretched state, thereby improving the use effect of the carbon fiber cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is described in more detail below by way of example with reference to the accompanying drawings, in which:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the carbon fiber cloth installation structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the installation structure of the pressure-applying component of the utility model;

[0018] Figure 4 For this utility model Figure 3 A schematic diagram of the structure at A;

[0019] Figure 5 It is a schematic diagram of the installation structure of the limit clamping plate of the utility model.

[0020] The meaning of each number in the figure is:

[0021] 1. Bottom plate; 11. Support frame; 12. Support plate; 13. Carbon fiber cloth storage plate;

[0022] 2. Laminating assembly; 21. Cylinder; 22. Piston rod; 23. Connecting piece;

[0023] 3. Pressure component; 31. Winding shaft; 32. Motor; 33. Rotating shaft;

[0024] 4. Limiting card plate; 41. Upper end plate; 42. Lower end plate; 43. Clamping hole;

[0025] 5. Fixing ring; 51. Mounting groove; 52. Threaded rod; 53. Mounting hole. DETAILED DESCRIPTION

[0026] Nowadays, when prestressing carbon fiber cloth, a certain distance needs to be maintained between the carbon fiber cloth and the concrete to facilitate the application of epoxy resin primer on the surface of the carbon fiber cloth after pressure is applied. After the pressure is applied, the distance between the carbon fiber cloth and the concrete needs to be adjusted so that the carbon fiber cloth can adhere to the surface of the concrete. The current carbon fiber cloth prestressing tensioning machine uses a sleeve to adjust the distance between the carbon fiber cloth and the concrete, and the sleeve is manually adjusted. When adjusting, it is easy to make the carbon fiber cloth after tensioning in an unbalanced state, which affects the tensioning stability of the carbon fiber cloth to a certain extent.

[0027] See also Figure 1-Figure 5 As shown, the device includes a base plate 1, four support frames 11 are fixedly connected to the top of the base plate 1, and a support plate 12 for supporting the concrete slab is fixedly connected to the top of the four support frames 11, and the support plate 12 is a hollow structure at the bottom, and a carbon fiber cloth storage plate 13 is installed at the bottom end of the support plate 12, and pressure components 3 for prestressing the carbon fiber cloth are installed on both sides of the interior of the carbon fiber cloth storage plate 13, and a fitting component 2 for adjusting the distance between the carbon fiber cloth and concrete is fixedly connected to the bottom of the carbon fiber cloth storage plate 13.

[0028] First, the specific structure of the bonding component 2 is disclosed. The bonding component 2 includes four cylinders 21 installed on the top of the base plate 1. The interior of the four cylinders 21 is movably connected with a piston rod 22. The bottom of the carbon fiber cloth storage plate 13 is fixedly connected with four connecting pieces 23. The ends of the four piston rods 22 away from the cylinders 21 are respectively connected to the four connecting pieces 23. When the carbon fiber cloth storage plate 13 needs to drive the carbon fiber cloth to fit the bottom of the concrete plate, the four cylinders 21 are started at the same time to drive the piston rod 22 to move vertically inside the cylinder 21. The two ends of the connecting piece 23 are used to connect the carbon fiber cloth storage plate 13 and the piston rod 22 respectively. When the piston rod 22 moves, the carbon fiber cloth storage plate 13 can be driven to lift as a whole, which effectively reduces the tilt of the carbon fiber cloth after the stretching is completed, which affects the tensioning stability of the carbon fiber cloth.

[0029] Secondly, the specific structure of the pressure component 3 is disclosed. The pressure component 3 includes a rotating shaft 33 installed at both ends of the middle part of the carbon fiber cloth storage plate 13. The surfaces of the two rotating shafts 33 are fixedly installed with winding shafts 31. One end of the two rotating shafts 33 is fixedly connected to the output shaft of the motor 32, and the two motors 32 are respectively installed on the surface of the carbon fiber cloth storage plate 13. When the carbon fiber cloth needs to be prestressed, the two ends of the carbon fiber cloth are wound on the surface of the two winding shafts 31, and the two motors 32 are started at the same time. The two motors 32 are reversely operated, which can drive the rotating shaft 33 fixedly connected to the output shaft of the motor 32 to rotate, thereby rotating the two winding shafts 31, driving the carbon fiber cloth connected between the two winding shafts 31 to stretch, and achieving the effect of prestressing the carbon fiber cloth.

[0030] The improvement of this embodiment is that: first, by setting four support frames 11 on the top of the base plate 1, the support plate 12 supporting the concrete plate can be stably installed. When the carbon fiber cloth needs to be prestressed, the two ends of the carbon fiber cloth are wound on the surface of the two winding shafts 31, and the two motors 32 are started at the same time. The two motors 32 are reversely operated, which can drive the rotating shaft 33 fixedly connected to the output shaft of the motor 32 to rotate, so that the two winding shafts 31 are rotated, and the carbon fiber cloth connected between the two winding shafts 31 is driven to stretch, so as to achieve the effect of prestressing the carbon fiber cloth. After the carbon fiber cloth is pressurized, epoxy resin primer is applied to the surface of the carbon fiber cloth, and then the four cylinders 21 are started at the same time to drive the piston rod 22 to move vertically inside the cylinder 21, and the two ends of the connecting piece 23 are respectively connected to the carbon fiber cloth storage plate 13 and the piston rod 22. When the piston rod 22 moves, the carbon fiber cloth storage plate 13 can be driven to be lifted as a whole, which effectively reduces the inclination of the carbon fiber cloth after the stretching is completed, which affects the tensioning stability of the carbon fiber cloth.

[0031] Considering the winding stability of the carbon fiber cloth during prestressing, in order to further improve the stability of the carbon fiber cloth during pressurization, Figure 1-Figure 5 As shown, two groups of limit clamps 4 are installed in the middle of the carbon fiber cloth storage plate 13. The two groups of limit clamps 4 are respectively located at one end of the two winding shafts 31 close to the middle of the carbon fiber cloth storage plate 13. The two groups of limit clamps 4 are formed by splicing an upper end plate 41 and a lower end plate 42, and a clamping hole 43 is formed between the upper end plate 41 and the lower end plate 42.

[0032] The improvement lies in that a limiting card plate 4 is used in the middle of the carbon fiber cloth storage plate 13, and the limiting card plate 4 is formed by splicing an upper end plate 41 and a lower end plate 42, so that a clamping hole 43 can be formed between the upper end plate 41 and the lower end plate 42, so that the carbon fiber cloth is inserted between the clamping holes 43, thereby achieving the effect of pressurizing and fixing the carbon fiber cloth.

[0033] Since the thickness of carbon fiber cloths of different specifications is different, in order to further improve the applicability of the limiting card plate 4, Figure 3-Figure 5 As shown, a mounting groove 51 is provided at the bottom end of the upper end plate 41, a mounting hole 53 is provided in the middle of the lower end plate 42, a threaded rod 52 is threadedly installed between the mounting groove 51 and the mounting hole 53, and a fixing ring 5 is rotatably provided on the outer wall of the lower end of the threaded rod 52.

[0034] The improvement lies in: utilizing the mounting groove 51 opened at the bottom of the upper end plate 41 and the mounting hole 53 opened in the middle of the lower end plate 42, and threadedly installing a threaded rod 52 between the mounting hole 53 and the mounting groove 51, so that the inner diameter of the clamping hole 43 formed between the upper end plate 41 and the lower end plate 42 can be adjusted, which is convenient for clamping carbon fiber cloth of different specifications, thereby improving the overall applicability of the limiting clamping plate 4, and utilizing the fixing ring 5 installed on the outer wall of the lower end of the threaded rod 52 to effectively improve the installation stability of the threaded rod 52.

[0035] In summary, the working principle of this scheme is as follows: first, by setting four support frames 11 on the top of the bottom plate 1, the support plate 12 supporting the concrete plate can be stably installed. When the carbon fiber cloth needs to be prestressed, the two ends of the carbon fiber cloth are wound on the surface of the two winding shafts 31, and the two motors 32 are started at the same time. The two motors 32 are reversely operated, which can drive the rotating shaft 33 fixedly connected to the output shaft of the motor 32 to rotate, so that the two winding shafts 31 are rotated, and the carbon fiber cloth connected between the two winding shafts 31 is stretched, so as to achieve the effect of prestressing the carbon fiber cloth. After the carbon fiber cloth is pressurized, epoxy resin primer is applied to the surface of the carbon fiber cloth, and then the four cylinders 21 are started at the same time to drive the piston rod 22 to move vertically inside the cylinder 21, and the two ends of the connecting piece 23 are respectively connected to the carbon fiber cloth storage plate 13 and the piston rod 22. When the piston rod 22 moves, the carbon fiber cloth storage plate 13 can be driven to lift as a whole, which effectively reduces the inclination of the carbon fiber cloth after the stretching is completed, which affects the tensioning stability of the carbon fiber cloth.

[0036] By using a limiting card plate 4 arranged in the middle of the carbon fiber cloth storage plate 13, and the limiting card plate 4 is formed by splicing an upper end plate 41 and a lower end plate 42, a clamping hole 43 can be formed between the upper end plate 41 and the lower end plate 42, so that the carbon fiber cloth is inserted between the clamping holes 43, so as to achieve the effect of pressurizing and fixing the carbon fiber cloth, and by using a mounting groove 51 opened at the bottom of the upper end plate 41 and a mounting hole 53 opened in the middle of the lower end plate 42, and a threaded rod 52 is threadedly installed between the mounting hole 53 and the mounting groove 51, so that the inner diameter of the clamping hole 43 formed between the upper end plate 41 and the lower end plate 42 can be adjusted, so as to facilitate clamping of carbon fiber cloths of different specifications.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A prestressed carbon fiber cloth tensioning machine, comprising a bottom plate (1), characterized in that: Four support frames (11) are fixedly connected to the top of the base plate (1), and a support plate (12) for supporting a concrete slab is fixedly connected to the top of the four support frames (11), and the support plate (12) is a bottom hollow structure, and a carbon fiber cloth storage plate (13) is installed at the bottom end of the support plate (12), and pressure components (3) for prestressing the carbon fiber cloth are installed on both sides of the interior of the carbon fiber cloth storage plate (13), and a fitting component (2) for adjusting the distance between the carbon fiber cloth and concrete is fixedly connected to the bottom of the carbon fiber cloth storage plate (13).

2. The prestressed carbon fiber cloth tensioning machine according to claim 1, characterized in that: The laminating assembly (2) comprises four cylinders (21) mounted on the top of the base plate (1), the interiors of the four cylinders (21) are all movably connected with piston rods (22), the bottom of the carbon fiber cloth storage plate (13) is fixedly connected with four connecting pieces (23), and the ends of the four piston rods (22) away from the cylinders (21) are respectively connected to the four connecting pieces (23).

3. The prestressed carbon fiber cloth tensioning machine according to claim 2, characterized in that: The pressure-applying assembly (3) comprises rotating shafts (33) mounted at both ends of the middle of the carbon fiber cloth storage plate (13), the surfaces of the two rotating shafts (33) are fixedly mounted with winding shafts (31), one end of the two rotating shafts (33) is respectively fixedly connected to the output shaft of a motor (32), and the two motors (32) are respectively mounted on the surface of the carbon fiber cloth storage plate (13).

4. The prestressed carbon fiber cloth tensioning machine according to claim 3, characterized in that: Two groups of limit clamping plates (4) are installed in the middle of the carbon fiber cloth storage plate (13). The two groups of limit clamping plates (4) are respectively located at one end of the two winding shafts (31) close to the middle of the carbon fiber cloth storage plate (13). The two groups of limit clamping plates (4) are formed by splicing an upper end plate (41) and a lower end plate (42). A clamping hole (43) is formed between the upper end plate (41) and the lower end plate (42).

5. The prestressed carbon fiber cloth tensioning machine according to claim 4, characterized in that: The bottom end of the upper end plate (41) is provided with a mounting groove (51), the middle portion of the lower end plate (42) is provided with a mounting hole (53), a threaded rod (52) is threadedly mounted between the mounting groove (51) and the mounting hole (53), and a fixing ring (5) is rotatably mounted on the outer wall of the lower end of the threaded rod (52).

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