CN215801076U

CN215801076U - Combined anchorage device for tensioning system

Info

Publication number: CN215801076U
Application number: CN202121964675.XU
Authority: CN
Inventors: 邵光卫
Original assignee: Kaifeng Dafang Prestress Co ltd
Current assignee: Kaifeng Dafang Prestress Co ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-02-11
Anticipated expiration: 2031-08-20

Abstract

The utility model relates to a combined anchorage device for a tensioning system, which comprises a jack, wherein the jack comprises an outer cylinder body and a piston positioned in the jack, a backing ring is arranged on the piston, a tool anchor is arranged on the backing ring, the backing ring is connected with the tool anchor through a first pin shaft, a guide rod is arranged on the outer cylinder body, a first limiting plate is arranged on the guide rod, a limiting device is arranged between the first limiting plate and the guide rod, the tool anchor is positioned between the first limiting plate and the backing ring, the first limiting plate is connected with the tool anchor through a second pin shaft, a limiting hole is formed in the first limiting plate, and a damping sleeve is arranged in the limiting hole. According to the combined anchorage device for the tensioning system, when tensioning is finished, the position of the first limiting plate is limited on the guide rod through the limiting device, the damping sleeve locks the steel strand in the reverse direction, the steel strand is prevented from moving towards the direction of the jack along with the tool anchor, and the prestress tensioning device is convenient to separate the tool anchor from the tool clamping piece by means of retraction of the piston.

Description

Combined anchorage device for tensioning system

Technical Field

The utility model relates to the field of prestressed beam tensioning, in particular to a combined anchorage device for a tensioning system.

Background

In the process of bridge construction, prestress tensioning is to apply prestress in advance in a bridge concrete member, so that the applied prestress tensioning member bears compressive stress, and further generates certain deformation to deal with the load borne by the beam-shaped member.

In the post-tensioning process, before the external load is borne by the engineering structural member and before the external load acts on the member, the concrete in a tensioned area of the member is pre-stressed by utilizing the elastic retraction after the tensioning of the reinforcing steel bar to generate prestress, so that the concrete structure fully exerts the characteristics of high tensile strength of the reinforcing steel bar and strong compression resistance of the concrete in a tensioned state, the bearing capacity of the member can be improved, the bending resistance and the rigidity of the member are improved, the occurrence time of cracks is delayed, and the durability of the member is improved.

Need usually dismantle instrument anchor and clamping piece after the stretch-draw, but because instrument anchor and clamping piece bear great power among the stretch-draw process, lead to moving back the anchor more hard, often adopt artifical sleeve and tup to move back the anchor, move back anchor inefficiency and extremely easy accidental injury operating personnel. In the prior art, a backing ring is arranged on a piston of the jack, a tool anchor limiting component is connected to the backing ring, after prestress tensioning is completed, the tool anchor is limited on the backing ring by the limiting component, the tool anchor and a tool clamping piece form relative movement along with retraction of the piston of the jack, so that the tool clamping piece falls off from the tool anchor, and then the tool anchor is taken down from a steel strand to finish anchor withdrawal.

The existing structure has some problems in the anchor withdrawing process, the clamping piece and the tool anchor cannot be separated in time and the steel strand is driven to retract to a certain extent along with the retraction of the piston of the jack, so that the steel strand deforms, the limiting assembly drives the tool anchor, the tool clamping piece and the steel strand which retracts to deform to move towards the working anchor, and the tool clamping piece and the tool anchor cannot be well separated.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the combined anchorage device for the tensioning system, which realizes the separation of the tool anchor and the working clamping piece by limiting the displacement of the steel strand and is used for overcoming the defects in the prior art.

The technical scheme adopted by the utility model is as follows: the utility model provides a combination ground tackle for stretch-draw system, includes the jack, the jack includes the outer cylinder body and is located the inside piston of jack, be provided with the backing ring on the piston, be provided with the instrument anchor on the backing ring, backing ring and instrument anchor are connected through first round pin axle, be provided with the guide bar on the outer cylinder body, be provided with first limiting plate on the guide bar, be provided with stop device between first limiting plate and the guide bar, the instrument anchor is located between first limiting plate and the backing ring, first limiting plate and instrument anchor are connected through second round pin axle, be provided with spacing hole on the first limiting plate, spacing downthehole damping sleeve that is provided with.

Preferably, stop device includes the bracing piece, the bracing piece adopts the porose shaft-like structure of one end, the locating hole has been seted up on the lateral wall in hole, install first stop screw in the locating hole, bracing piece sliding sleeve is on the guide bar, the bracing piece other end fixed mounting is on first limiting plate.

Preferably, the damping sleeve adopts a cylindrical structure with sawteeth on the inner wall and the outer wall respectively.

Preferably, a tool clamping piece is arranged between the first limiting plate and the tool anchor, and the tool clamping piece is abutted to the first limiting plate through a spring.

Preferably, the first limiting plate comprises an inner plate and an outer plate, the inner plate is sleeved in the outer plate, and the outer plate and the inner plate are provided with second limiting screws.

Preferably, the damping sleeve is mounted on the inner plate.

Preferably, the piston and the backing ring are threadedly connected.

The utility model has the following beneficial effects: 1. the combined anchorage device for the tensioning system of the utility model is characterized in that the outer cylinder body is provided with a guide rod, a first limit plate is arranged on the guide rod, a limit device is arranged between the first limit plate and the guide rod, the first limiting plate is provided with a limiting hole, a damping sleeve is arranged in the limiting hole, the steel strand penetrates through the damping sleeve, the steel strand in the damping sleeve is normally tensioned and moved during tensioning, when the stretch-draw finishes, through stop device is injectd first spacing board position on the guide bar, the damping cover carries out reverse locking to the steel strand wires, prevents that the steel strand wires from removing to the jack direction along with the tool anchor, is convenient for prestressing force tensioning device utilizes the retraction of piston to realize the separation of tool anchor and tool clamping piece, extracts first round pin axle and follows the backing ring separation with the tool anchor, takes off the tool anchor from the steel strand wires again, accomplishes and moves back the anchor.

2. According to the combined anchorage device for the tensioning system, the first limiting plate comprises an inner plate and an outer plate, the inner plate is sleeved in the outer plate, the outer plate and the inner plate are provided with second limiting screws, the second limiting screws are detached from the inner plate after tensioning is finished, the outer plate and the inner plate can move relatively, and the tool anchor drives the steel strand and the inner plate to rotate to a certain extent in the retraction process of the piston, so that force is applied to the steel strand from the radial direction, the steel strand is further locked, and the steel strand is prevented from retracting and deforming along with the tool anchor.

3. According to the combined anchorage device for the tensioning system, the first limiting plate is connected with the tool anchor through the second pin shaft, the limiting plate can be conveniently detached after tensioning is finished, the tool clamping piece is arranged between the first limiting plate and the tool anchor and is abutted with the first limiting plate through the spring, and the combined anchorage device is convenient for the prestress tensioning device to realize continuous tensioning and provides the tensioning working efficiency.

4. According to the combined anchor for the tensioning system, the piston is in threaded connection with the backing ring, so that the backing ring is convenient to disassemble, and the application range of the combined anchor is widened by replacing the backing ring and the tool anchor.

The utility model has simple structure and is a product easy to popularize and use.

Drawings

FIG. 1 is a schematic drawing of a tensioned structure according to the present invention.

Fig. 2 is a schematic structural view of the components of the present invention.

Fig. 3 is a schematic view of the structure of the component of the present invention.

Fig. 4 is a schematic structural diagram of the anchor withdrawal device of the present invention.

In the figure: 1. an outer cylinder body; 2. a piston; 3. a backing ring; 4. a tool anchor; 5. a first pin shaft; 6. a guide bar; 7. a first limit plate; 8. a second pin shaft; 9. a limiting hole; 10. a damping sleeve; 11. a support bar; 12. positioning holes; 13. a first limit screw; 14. a tool clamping piece; 15. a spring; 16. a second limit screw; 17. a working anchor; 18. steel strand wires; 19. and a second limiting plate.

Detailed Description

As shown in fig. 1, 2 and 3, a combined anchorage device for a tensioning system comprises a jack, wherein the jack comprises an outer cylinder body 1 and a piston 2 located inside the jack, a backing ring 3 is arranged on the piston 2, the piston 2 is in threaded connection with the backing ring 3, a tool anchor 4 is arranged on the backing ring 3, the backing ring 3 is connected with the tool anchor 4 through a first pin shaft 5, a guide rod 6 is fixedly installed on the outer cylinder body 1, a first limiting plate 7 is arranged on the guide rod 6, a limiting device is arranged between the first limiting plate 7 and the guide rod 6, the tool anchor 4 is located between the first limiting plate 7 and the backing ring 3, the first limiting plate 7 is connected with the tool anchor 4 through a second pin shaft 8, a limiting hole 9 is arranged on the first limiting plate 7, a damping sleeve 10 is arranged in the limiting hole 9, the damping sleeve 10 limits reverse movement of a steel strand 18 in the damping sleeve 10, the positive tensioning movement of the steel strands 18 is not affected.

Stop device includes bracing piece 11, bracing piece 11 adopts the porose shaft-like structure of one end, locating hole 12 has been seted up on the lateral wall in hole, install first stop screw 13 in the locating

hole

12, 11 slip suits of bracing piece are on

guide bar

6, 11 other end fixed mounting of bracing piece is on first limiting plate 7.

Damping sleeve 10 adopts the inner and outer wall to equally divide the tubular structure who is provided with the sawtooth respectively, damping sleeve 10 adopts the rubber material to make.

A tool clamping piece 14 is arranged between the first limiting plate 7 and the tool anchor 4, and the tool clamping piece 14 is abutted against the first limiting plate 7 through a spring 15.

First limiting plate 7 includes inner panel and planking, the planking adopts circular lid column structure, the inner panel suit is in the planking, the planking with be provided with second stop screw 16 on the inner panel, damping sleeve 10 is installed on the inner panel.

The use method of the product is as follows:

1. the jack of the combined anchor for the tensioning system is installed in place, a steel strand 18 penetrates into the tool anchor 4, the tool anchor 4 is installed on the backing ring 3 through the first pin shaft 5, the tool clamping piece 14 and the spring 15 are installed, the first limiting plate 7 is sleeved on the guide rod 6, the first limiting plate 7 is fixed on the tool anchor 4 through the second pin shaft 8, the first limiting screw 13 is screwed out of the positioning hole 12, the first limiting plate 7 moves along the guide rod 6, and normal tensioning is started after the combined anchor is installed in place.

2. After the stretching, the first limit screw 13 is screwed into the positioning hole 12, the second limit screw 16 is screwed out of the first limit plate 7, the first limit plate 7 is separated from the tool anchor 4 by moving out the second pin shaft 8, the tool anchor 4 is driven to be away from the first limit plate 7 by retraction of the piston 2, after the retraction distance of the piston 2 exceeds the compression amount of the spring 15, or the spring 15 is elastically damaged, and the separation of the tool anchor 4 and the tool clamping piece 14 is realized along with the continuous retraction of the piston 2.

According to the combined anchorage device for the tensioning system, the outer cylinder body 1 is provided with the guide rod 6, the guide rod 6 is provided with the first limit plate 7, the limit device is arranged between the first limit plate 7 and the guide rod 6, the first limit plate 7 is provided with the limit hole 9, the limit hole 9 is internally provided with the damping sleeve 10, the steel strand penetrates through the damping sleeve 10, the steel strand in the damping sleeve 10 is normally tensioned and moved when tensioning is carried out, when tensioning is finished, the position of the first limit plate 7 is limited on the guide rod 6 through the limit device, the damping sleeve 10 reversely locks the steel strand 18 to prevent the steel strand 18 from moving along with the tool anchor 4 in the jack direction, the prestress tensioning device realizes the separation of the tool anchor 4 and the tool clamping piece 14 by utilizing the retraction of the piston 2 to enable the tool clamping piece 14 to fall off from the tool anchor 4, and (3) pulling out the first pin shaft 5 to separate the tool anchor 4 from the backing ring 3, and then taking down the tool anchor 4 from the steel strand 18 to finish anchor withdrawal.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A combination ground tackle for a tensioning system, includes the jack, the jack includes outer cylinder body (1) and is located the inside piston (2) of jack, its characterized in that: be provided with backing ring (3) on piston (2), be provided with instrument anchor (4) on backing ring (3), backing ring (3) and instrument anchor (4) are connected through first round pin axle (5), be provided with guide bar (6) on external cylinder body (1), be provided with first limiting plate (7) on guide bar (6), be provided with stop device between first limiting plate (7) and guide bar (6), instrument anchor (4) are located between first limiting plate (7) and backing ring (3), first limiting plate (7) and instrument anchor (4) are connected through second round pin axle (8), be provided with spacing hole (9) on first limiting plate (7), be provided with damping sleeve (10) in spacing hole (9).

2. A modular anchorage for a tensioning system according to claim 1, characterised in that: stop device includes bracing piece (11), bracing piece (11) adopt the porose shaft-like structure of one end, locating hole (12) have been seted up on the lateral wall in hole, install first stop screw (13) in locating hole (12), bracing piece (11) slip suit is on guide bar (6), bracing piece (11) other end fixed mounting is on first limiting plate (7).

3. A modular anchorage for a tensioning system according to claim 1, characterised in that: the damping sleeve (10) is of a cylindrical structure with inner and outer walls respectively provided with sawteeth.

4. A modular anchorage for a tensioning system according to claim 1, characterised in that: a tool clamping piece (14) is arranged between the first limiting plate (7) and the tool anchor (4), and the tool clamping piece (14) is abutted against the first limiting plate (7) through a spring (15).

5. A modular anchorage for a tensioning system according to claim 1, characterised in that: the first limiting plate (7) comprises an inner plate and an outer plate, the inner plate is sleeved in the outer plate, and a second limiting screw (16) is arranged on the outer plate and the inner plate.

6. A composite anchor for a tensioning system according to claim 5, wherein: the damping sleeve (10) is mounted on the inner plate.

7. A modular anchorage for a tensioning system according to claim 1, characterised in that: the piston (2) is in threaded connection with the backing ring (3).