CN212671275U

CN212671275U - Tensioning anchorage unit of prestressed carbon fiber plate

Info

Publication number: CN212671275U
Application number: CN202021195542.6U
Authority: CN
Inventors: 李风宁; 罗仕刚
Original assignee: Carbo Technology Group Co ltd
Current assignee: Carbo Technology Group Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-03-09
Anticipated expiration: 2030-06-24

Abstract

The utility model discloses a stretch-draw ground tackle unit of prestressing force carbon fiber board, include: the tensioning end anchorage is fixedly connected with one end of the carbon fiber plate; the tensioning end anchoring seat is arranged on one side, away from the carbon fiber plate, of the tensioning end anchorage device; the jack is fixedly arranged on one side of the tensioning end anchoring seat, which is far away from the tensioning end anchorage device; one end of the tensioning screw is fixedly connected with the tensioning end anchorage device, and the other end of the tensioning screw penetrates through the tensioning end anchoring seat and the jack. The utility model discloses a stretch-draw ground tackle unit is little to former concrete structure damage, and stretch-draw direction is high with the main extending direction uniformity of carbon fiber plate, can avoid the damage of carbon fiber plate.

Description

Tensioning anchorage unit of prestressed carbon fiber plate

Technical Field

The utility model relates to a building reinforcement technical field especially relates to a stretch-draw ground tackle unit of prestressing force carbon fiber board.

Background

The prestressed carbon fiber plate is widely applied to reinforcement, upgrading and reconstruction of building concrete. The anchorage device is the core of the prestressed carbon fiber plate, and can effectively transfer the load borne by the carbon fiber plate to a reinforced building. The carbon fiber plate with the width of 100mm, 50mm and 20mm and the thickness of 1-4mm is commonly used as a prestressed carbon fiber plate. In the tensioning process, the stress transfer condition is greatly influenced by the thickness of the adhesive, and the thickness of the adhesive layer for adhering the carbon fiber plate cannot be too large. Therefore, how to ensure the uniform thickness of the adhesive is an important factor of the reinforcing effect of the prestressed carbon fiber plate, in order to ensure the uniform thickness of the adhesive, a slotted construction process is generally adopted, a tensioning device of the anchorage device is installed in a slotted groove, the slotted area is large due to the fact that the width and the length of the tensioning device are large, the original structure can be damaged to a certain degree, the carbon fiber plate is damaged due to the fact that the stress of the carbon fiber plate is not uniform in the tensioning process, and the structure reinforcing effect cannot be achieved.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a prestressed carbon fiber plate tension anchor unit which has little damage to the original concrete structure, has high consistency between the tension direction and the main extension direction of the carbon fiber plate, and can avoid the damage of the carbon fiber plate.

The utility model provides a tensioning anchorage unit of prestressed carbon fiber plate, which comprises a tensioning end anchorage, a tensioning end anchorage seat, a jack and a tensioning screw rod; wherein the content of the first and second substances,

the tensioning end anchorage device is fixedly connected with one end of the carbon fiber plate and used for fixing the carbon fiber plate;

the tensioning end anchoring seat is arranged on one side, away from the carbon fiber plate, of the tensioning end anchorage device, is fixed on the surface of concrete to be reinforced through a bolt, and is used for locking the tensioning screw rod and supporting the jack;

the jack is fixedly arranged on one side, away from the anchor of the tensioning end, of the tensioning end anchoring seat, the telescopic end of the jack is arranged towards one side, away from the tensioning end anchoring seat, and the jack is a center-penetrating jack;

stretch-draw screw rod, one end with stretch-draw end ground tackle fixed connection, the other end runs through stretch-draw end anchor seat and jack setting, stretch-draw screw rod goes up to be located stretch-draw end anchor seat internal thread has cup jointed lock nut for the restriction stretch-draw screw rod removes to carbon fiber plate one side, the one end screw thread that stretch-draw screw rod passed the jack has cup jointed counter-force nut.

Preferably, stretch-draw end anchor seat is located including detaining the U type support on concrete surface, U type support is followed carbon fiber plate length direction's bilateral symmetry is provided with the mounting panel, the mounting hole has been seted up on the mounting panel, be provided with the counter-force seat between U type support and the jack, the cross section of counter-force seat is the rectangle, follow on the counter-force seat the through-hole has been seted up to the axial lead of jack, the stretch-draw screw rod passes U type support and through-hole setting, lock nut is located set up in the counter-force seat.

Preferably, stretch-draw end ground tackle includes the stretch-draw anchor block, follow in the stretch-draw anchor block the length direction of carbon fiber plate is provided with the wedge passageway, the thickness of wedge passageway is along keeping away from the direction of carbon fiber plate increases gradually, the one end of carbon fiber plate stretches into set up in the wedge passageway, be located in the wedge passageway the bilateral symmetry of carbon fiber plate be provided with the voussoir.

Preferably, the wedge block is uniformly provided with a tooth-shaped structure on the wall surface attached to the carbon fiber plate.

Preferably, one end, far away from the carbon fiber plate, of the tensioning end anchorage device is provided with a threaded hole above the wedge-shaped channel, and the tensioning screw is in threaded connection with the threaded hole.

Preferably, the top surface of the U-shaped support is provided with a shaped hole.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses in, the surface setting that is used for the wedge passageway of fixed carbon fiber plate to press close to the concrete has reduced the gap between carbon fiber plate and the concrete, has ensured that the thickness of glue film can effectively exert the stress transfer of carbon fiber plate, need not to slot in the surface of concrete simultaneously, has avoided causing the destruction to the concrete structure of former building.

(2) The utility model discloses in, stretch-draw end ground tackle and stretch-draw end anchor seat are the separation, and the removal of stretch-draw end ground tackle does not receive the restriction of stretch-draw end anchor seat, and simultaneously, the stretch-draw screw rod is single, and at the stretch-draw in-process, stretch-draw end ground tackle can be along with the main extending direction automatic adjustment of carbon fiber plate, has avoided leading to the problem that the carbon plate damaged because of the error in the stretch-draw end anchor seat installation.

(3) The utility model discloses a stretch-draw ground tackle unit, when the installation, only stretch-draw end anchor seat need through the bolt fastening to the concrete on the surface, the installation is very simple and convenient, has saved the labour who consolidates the operation.

It should be understood that what is described in this summary section is not intended to limit key or critical features of embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a schematic structural view of a tension anchor unit of a prestressed carbon fiber plate;

FIG. 2 is a schematic top view of a tensioned anchorage unit for prestressed carbon fiber panels;

FIG. 3 is a schematic bottom view of a tensioned anchorage unit for prestressed carbon fiber panels;

FIG. 4 is a cross-sectional view of a tension end anchor;

FIG. 5 is a side view of a tension end anchor.

Reference numbers in the figures: 11. a carbon fiber sheet; 12. a tension end anchorage; 13. a tension end anchoring seat; 14. a jack; 15. stretching the screw;

21. tensioning the anchor block; 22. a wedge-shaped channel; 23. a wedge block; 24. a tooth-shaped structure; 25. a threaded hole;

31. a U-shaped support; 32. mounting a plate; 33. mounting holes; 34. a counter-force seat; 35. a hole is formed;

51. locking the nut; 52. a reaction nut.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 5, an embodiment of the present invention provides a tension anchor unit for prestressed carbon fiber plates, including a tension end anchor 12, a tension end anchoring seat 13, a jack 14 and a tension screw 15; wherein the content of the first and second substances,

the tensioning end anchorage 12 is fixedly connected with one end of the carbon fiber plate 11 and used for fixing the carbon fiber plate 11;

the tensioning end anchoring seat 13 is arranged on one side, away from the carbon fiber plate 11, of the tensioning end anchorage 12, is fixed on the surface of concrete to be reinforced through bolts, and is used for locking a tensioning screw 15 and supporting a jack 14;

the jack 14 is fixedly arranged on one side, away from the anchorage 12, of the tensioning end anchoring seat 13, the telescopic end of the jack 14 is arranged towards one side, away from the tensioning end anchoring seat 13, and the jack 14 is a center-penetrating jack;

one end of the tensioning screw rod 15 is fixedly connected with the tensioning end anchorage device 12, the other end of the tensioning screw rod is arranged by penetrating through the tensioning end anchoring seat 13 and the jack 14, a locking nut 51 is sleeved on the tensioning screw rod 15 and located in the tensioning end anchoring seat 13 through an internal thread and used for limiting the tensioning screw rod 15 to move towards one side of the carbon fiber plate 11, and a counter-force nut 52 is sleeved on one end of the tensioning screw rod 15, which penetrates through the jack 14, through a thread.

In this embodiment, the tension anchor unit is disposed at one end of the carbon fiber plate 11, and the carbon fiber plate 11 is tensioned to apply prestress thereto, and the carbon fiber plate 11 applied with prestress is anchored on the concrete surface of the building to be reinforced, so as to reinforce the building.

The tensioning anchor unit has fewer components, can be conveniently assembled and installed on a construction site, and is convenient and flexible to construct. When the tensioning operation is carried out, firstly, the carbon fiber plate 11 is cut according to the size of a reinforced part, one end of the carbon fiber plate 11 is fixedly connected with the tensioning end anchorage device 12, the other end of the carbon fiber plate is fixed on the surface of concrete through the anchoring part, the tensioning end anchoring seat 13 is fixed on the surface of the concrete through a bolt, and then the jack 14 and the tensioning screw 15 are installed on the tensioning end anchoring seat 13. And (3) smearing adhesive on the surface of the carbon fiber plate 11 close to the concrete, straightening and pasting the carbon fiber plate 11 on the surface of the concrete, and finishing primary fixation.

Then, a tension process is performed. The counter-force nut 52 is pushed by the jack 14 to drive the tensioning end anchorage device 12 to move towards the direction far away from the carbon fiber plate 11, and the locking nut 51 is continuously screwed along with the movement of the tensioning end anchorage device 12 to lock the tensioning screw 15.

And in the tensioning process, a mechanical sensor is adopted for monitoring the tension. A mechanical sensor is arranged at the position where the tensioning screw 15 is connected with the jack 14, the sensor is in contact with the jack 14, the applied prestress is transmitted to a pressure sensor, a display externally connected with the pressure sensor can display a tensioning force value, and tensioning is stopped when the tensioning force reaches a preset value. After the lock nut 51 is tightened, the jack 14 is removed, and the carbon fiber plate 11 is tensioned.

In the process of tensioning the carbon fiber plate 11, the single tensioning screw 15 and the tensioning end anchorage 12 which is not limited by the tensioning end anchoring seat 13 can be automatically adjusted along with the main extension direction of the carbon fiber plate 11, and the carbon fiber plate 11 cannot be damaged due to errors in the installation process of the tensioning end anchoring seat 13.

In a preferred embodiment, as shown in fig. 1 to 3, the tensioning end anchoring base 13 includes a U-shaped support 31 fastened on the concrete surface, the U-shaped support 31 is symmetrically provided with mounting plates 32 along both sides of the length direction of the carbon fiber plate 11, the mounting plates 32 are provided with mounting holes 33, a reaction base 34 is provided between the U-shaped support 31 and the jack 14, the cross section of the reaction base 34 is rectangular, the reaction base 34 is provided with through holes along the axial line of the jack 14, the tensioning screw 15 passes through the U-shaped support 31 and the through holes, and the locking nut 51 is located in the reaction base 34.

In this embodiment, the U-shaped support 31 is fixed to the surface of the concrete by the mounting plates 32 at both sides, and the U-shaped support 31 can play a role of supporting the reaction force seat 34 without affecting the tension of the tension screw 15.

The locking nut 51 is positioned in the reaction force seat 34 and close to the top opening, and a wrench for screwing the locking nut 51 only needs to stretch the jaw teeth into one part of the reaction force seat 34, so that the fastening of the wrench on the locking nut 51 is not influenced. To enhance the fastening effect of the lock nut 51, a double nut may be installed.

The stretching end anchoring seat 13 is reasonable in structural design, and can simultaneously complete stretching and locking of the stretching screw rod 15.

In a preferred embodiment, as shown in fig. 1 to 5, the tensioning end anchorage device 12 includes a tensioning anchor block 21, a wedge-shaped channel 22 is disposed in the tensioning anchor block 21 along a length direction of the carbon fiber plate 11, the wedge-shaped channel 22 is disposed adjacent to a surface of the concrete, a thickness of the wedge-shaped channel 22 gradually increases along a direction away from the carbon fiber plate 11, one end of the carbon fiber plate 11 extends into the wedge-shaped channel 22, and wedges 23 are symmetrically disposed in the wedge-shaped channel 22 on two sides of the carbon fiber plate 11.

In this embodiment, the tension end anchor head 12 is used to secure one end of the carbon fiber plate 11. Through the cooperation of the wedge-shaped channel 22 and the wedge 23, when the carbon fiber plate 11 is stretched, the greater the stretching force, the firmer the clamping of the wedge 23 on the carbon fiber plate 11 is. Structural design is reasonable, adopts the fixed knot structure of pure mechanical type, has replaced the fixed mode of bonding of structural adhesive, has avoided the problem that the structural adhesive became invalid for a long time, and fixed effect is better.

In a preferred embodiment, as shown in fig. 4, the wedge 23 is provided with a tooth-shaped structure 24 uniformly on the wall surface which is attached to the carbon fiber plate 11.

In this embodiment, the tooth-shaped structure 24 is formed by a plurality of protruding ridges on the surface of the wedge block 23, the length direction of the protruding ridges is perpendicular to the length direction of the carbon fiber plate 11, and the tooth-shaped structures on the two sides of the carbon fiber plate 11 can effectively clamp the carbon fiber plate 11, so that the fixing effect of the tension end anchorage 12 is further improved.

In a preferred embodiment, as shown in fig. 5, a threaded hole 25 is formed in one end of the tensioning end anchorage 12, which is far away from the carbon fiber plate 11, above the wedge-shaped channel 22, and the tensioning screw 15 is in threaded connection with the threaded hole 25. The detachable threaded connection structure facilitates the disassembly and assembly of the tensioning anchor device unit.

In a preferred embodiment, as shown in fig. 2, the top surface of the U-shaped support 31 is provided with a hole 35. The self-weight of the member can be reduced without affecting the structural strength.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tensioning anchorage unit of a prestressed carbon fiber plate is characterized by comprising a tensioning end anchorage, a tensioning end anchorage seat, a jack and a tensioning screw; wherein the content of the first and second substances,

2. A tension anchor unit as claimed in claim 1, wherein the tension anchor base includes a U-shaped support fastened to the concrete surface, the U-shaped support is symmetrically provided with mounting plates along both sides of the carbon fiber plate in the length direction, the mounting plates are provided with mounting holes, a reaction base is provided between the U-shaped support and the jack, the reaction base has a rectangular cross section, the reaction base is provided with through holes along the axial line of the jack, the tension screw passes through the U-shaped support and the through holes, and the lock nut is located in the reaction base.

3. A tensioned anchorage unit according to claim 2, wherein the tensioned anchorage comprises a tensioned anchorage block, a wedge-shaped channel is arranged in the tensioned anchorage block along the length direction of the carbon fiber plate, the wedge-shaped channel is arranged close to the surface of the concrete, the thickness of the wedge-shaped channel gradually increases along the direction away from the carbon fiber plate, one end of the carbon fiber plate extends into the wedge-shaped channel, and wedges are symmetrically arranged on two sides of the carbon fiber plate in the wedge-shaped channel.

4. A tension anchor unit according to claim 3, wherein the wedge is provided with a toothed formation uniformly on the wall to which the carbon fibre sheet is attached.

5. A tension anchor unit according to claim 4, wherein the end of the tension end anchor remote from the carbon fibre plate is provided with a threaded hole above the wedge channel, and the tension screw is in threaded connection with the threaded hole.

6. A tension anchor unit as claimed in claim 5, wherein the top surface of the U-shaped seat is apertured.