CN219315516U

CN219315516U - Cast-in-situ box girder prestress tensioning support

Info

Publication number: CN219315516U
Application number: CN202320333434.8U
Authority: CN
Inventors: 丁义馨; 朱坤; 胡立群; 郑海; 宋殿峰; 张晓芬
Original assignee: Zhongzi Shengyu Traffic Design And Research Co ltd
Current assignee: Zhongzi Shengyu Traffic Design And Research Co ltd
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-07-07
Anticipated expiration: 2033-02-24

Abstract

The utility model relates to the technical field of box girder manufacturing, in particular to a cast-in-situ box girder prestress tensioning bracket which comprises a balancing weight, a tensioning jack, a return frame, a cross rod, two sliding frames and a tensioning bracket for installing the cast-in-situ box girder; the cast-in-situ box girder is arranged on the tensioning bracket; both sliding frames are in sliding connection with the tensioning support; two ends of the cross rod are respectively connected with two sliding frames, and the projection shape of the cross rod is rectangular; the square frame is arranged on the cross rod in a sliding way; the tensioning jack is arranged on the end face of the square frame, which faces the cast-in-situ box girder; the balancing weight is arranged on the end surface of the square frame far away from the cast-in-situ box girder; the tensioning support is provided with a lifting component for lifting the two sliding frames. According to the utility model, the height of the tensioning jack is changed through the lifting device, and then the horizontal position of the tensioning jack is moved through pulling the balancing weight, so that the tensioning jack moves along the cross rod, and the device is more stable and convenient to use.

Description

Cast-in-situ box girder prestress tensioning support

Technical Field

The utility model relates to the technical field of box girder manufacturing, in particular to a cast-in-situ box girder prestress tensioning bracket.

Background

The box girder is one of the middle girders of bridge engineering, the inside is hollow, flanges are arranged on two sides of the upper part, and the box girder is similar to a box, thus obtaining the name. In the case of prestressed-tensioning-frame reinforced-concrete box girders, it is often necessary to apply a prestressed tensioning frame to the already prefabricated box girders, while the applied stress is mainly a longitudinal prestressed tensioning frame, which is generally applied by means of a jack. In the conventional application process, a worker needs to adjust the height of the whole jack and the distance from the box Liang Duanmian according to the steel strands with different heights, and the jack and the matched equipment are very troublesome in adjusting the jack and the matched equipment after tensioning one group of steel strands due to the large mass of the jack and the matched equipment.

The Chinese patent with the authorized bulletin number of CN212200093U discloses a cast-in-situ box girder prestress tensioning support and a movable tensioning device, wherein the tensioning support adopts an integral design, so that the cast-in-situ box girder prestress tensioning support is convenient to disassemble and assemble; the movable tensioning device can adjust the position of the jack in space, reduces the trouble of inconvenient adjustment of the jack, and is suitable for butt-joint tensioning of steel strands under different working conditions.

However, the device is inconvenient to stably move and limit the device body, and the movement of the tensioning jack is still troublesome.

Disclosure of Invention

The utility model aims to solve the problems in the background art and provides a cast-in-situ box girder prestress tensioning bracket which is convenient to change the position of a tensioning jack.

The technical scheme of the utility model is as follows: a cast-in-situ box girder prestress tensioning support comprises a balancing weight, a tensioning jack, a return frame, a cross rod, two sliding frames and a tensioning support for mounting the cast-in-situ box girder;

the cast-in-situ box girder is arranged on the tensioning bracket;

both sliding frames are in sliding connection with the tensioning support; two ends of the cross rod are respectively connected with two sliding frames, and the projection shape of the cross rod is rectangular; the square frame is arranged on the cross rod in a sliding way; the tensioning jack is arranged on the end face of the square frame, which faces the cast-in-situ box girder; the balancing weight is arranged on the end surface of the square frame far away from the cast-in-situ box girder;

the tensioning support is provided with a lifting component for lifting the two sliding frames.

Preferably, the tensioning support comprises a vertical plate, a transverse plate, a fixed plate, a limiting plate and two connecting plates; the vertical plate is connected with the limiting plate, and the vertical plate and the limiting plate are mutually perpendicular; the transverse plate and the fixed plate are arranged on the vertical plate side by side; the two connecting plates are distributed side by side, and two ends of each connecting plate are respectively connected with the transverse plate and the fixed plate; the two sliding frames are respectively connected with the two connecting plates in a sliding way.

Preferably, the device further comprises two reinforcing plates; the two ends of each reinforcing plate are respectively connected with the vertical plate and each fixing plate.

Preferably, the vertical plate and the limiting plate are of an integrated structure.

Preferably, the lifting device comprises two ropes, a motor and two limiting rings; the motor is arranged on the fixed plate; the two limiting rings are respectively arranged on the two sliding frames; one end of each rope is connected with the output shaft of the motor, and the other end of each rope penetrates through the fixing plate and is connected with each limiting ring.

Preferably, the device further comprises a swinging plate; the upper end face of the cross rod is provided with a plurality of through holes; the square frame is provided with a through hole; one end of the swinging plate is movably connected with the balancing weight, and the swinging plate is provided with a clamping column for being matched and clamped into the through hole and the through hole.

Preferably, the rubber ring is arranged outside the clamping column.

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial technical effects:

the user starts the motor to enable the ropes to shrink or stretch, so that the two sliding frames are driven to move along the two connecting plates in the vertical direction, and the numerical height of the tensioning jack is changed; then, by moving the balancing weight, the positions of the return frame and the tensioning jack are conveniently changed, so that the steel strands at different positions are conveniently operated; the cross rod with the rectangular section enables the movement of the return frame to be more stable, and further enables the tensioning jack to be more stable.

The user rotates the swinging plate, so that the clamping columns are matched and clamped into the through holes and the through holes, the square frame is fixed on the cross rod, and the stability of the device is improved; meanwhile, the clamping columns and the cross bars are matched more stably through the rubber rings.

Drawings

Fig. 1 is a schematic side view of the present utility model.

Fig. 2 is a schematic structural view of a cross bar in the present utility model.

Reference numerals: 1. a cast-in-situ box girder; 21. a riser; 22. a cross plate; 23. a fixing plate; 24. a limiting plate; 25. a connecting plate; 3. balancing weight; 4. a rope; 5. a motor; 6. tensioning jack; 7. a mold frame; 8. a swinging plate; 9. a clamping column; 10. a cross bar; 101. a through hole; 12. a sliding frame; 13. and a limiting ring.

Detailed Description

Example 1

As shown in fig. 1-2, the prestress tensioning bracket for the cast-in-situ box girder provided by the utility model comprises a balancing weight 3, a tensioning jack 6, a return frame 7, a swinging plate 8, a cross rod 10, two sliding frames 12 and a tensioning bracket for mounting the cast-in-situ box girder 1.

The cast-in-situ box girder 1 is arranged on a tensioning bracket; the tensioning support comprises a vertical plate 21, a transverse plate 22, a fixed plate 23, a limiting plate 24 and two connecting plates 25; the vertical plate 21 is connected with the limiting plate 24, the vertical plate 21 and the limiting plate 24 are mutually vertical, the vertical plate 21 and the limiting plate 24 are of an integrated structure, and the integrated vertical plate 21 and the limiting plate 24 are more firmly connected; the transverse plate 22 and the fixed plate 23 are arranged on the vertical plate 21 side by side; two connecting plates 25 are distributed side by side, and two ends of each connecting plate 25 are respectively connected with a transverse plate 22 and a fixed plate 23; the two sliding frames 12 are respectively connected with the two connecting plates 25 in a sliding manner; the device also comprises two reinforcing plates; the two ends of each reinforcing plate are respectively connected with the vertical plate 21 and each fixing plate 23.

Both sliding frames 12 are in sliding connection with the tensioning support; two ends of the cross rod 10 are respectively connected with two sliding frames 12, and the projection shape of the cross rod 10 is rectangular; the square frame 7 is arranged on the cross bar 10 in a sliding way; the tensioning jack 6 is arranged on the end face of the square frame 7 facing the cast-in-situ box girder 1; the balancing weight 3 is arranged on the end surface of the square frame 7 far away from the cast-in-situ box girder 1.

The tensioning support is provided with a lifting assembly for lifting the two sliding frames 12; the lifting device comprises two ropes 4, a motor 5 and two limiting rings 13; the motor 5 is mounted on the fixed plate 23; two limiting rings 13 are respectively arranged on the two sliding frames 12; one end of each rope 4 is connected with the output shaft of the motor 5, and the other end of each rope 4 passes through the fixed plate 23 and is connected with each limiting ring 13; the fixed plate 23 is provided with two mounting holes for passing through the two ropes 4; and a round corner is arranged on the inner wall of the mounting hole.

In the utility model, when in use, a user starts the motor 5 to enable the rope 4 to shrink or stretch, so as to drive the two sliding frames 12 to move along the two connecting plates 25 in the vertical direction, and change the numerical height of the tensioning jack 6; then, by moving the balancing weight 3, the positions of the square frame 7 and the tensioning jack 6 are conveniently changed, so that the steel strands at different positions are conveniently operated; the rectangular cross section cross bar 10 makes the movement of the return frame 7 more stable, and further makes the tensioning jack 6 more stable.

Example two

As shown in fig. 2, the prestress tensioning bracket for the cast-in-situ box girder provided by the utility model comprises a balancing weight 3, a tensioning jack 6, a return frame 7, a cross rod 10, two sliding frames 12 and a tensioning bracket for mounting the cast-in-situ box girder 1.

The cast-in-situ box girder 1 is arranged on a tensioning bracket; the tensioning support comprises a vertical plate 21, a transverse plate 22, a fixed plate 23, a limiting plate 24 and two connecting plates 25; the vertical plate 21 is connected with the limiting plate 24, the vertical plate 21 and the limiting plate 24 are mutually vertical, the vertical plate 21 and the limiting plate 24 are of an integrated structure, and the integrated vertical plate 21 and the limiting plate 24 are more firmly connected; the transverse plate 22 and the fixed plate 23 are arranged on the vertical plate 21 side by side; two connecting plates 25 are distributed side by side, and two ends of each connecting plate 25 are respectively connected with a transverse plate 22 and a fixed plate 23; the two sliding frames 12 are respectively connected with the two connecting plates 25 in a sliding manner; the device also comprises two reinforcing plates; two ends of each reinforcing plate are respectively connected with the vertical plate 21 and each fixing plate 23; the fixed plate 23 is provided with two mounting holes for passing through the two ropes 4; and a round corner is arranged on the inner wall of the mounting hole.

The tensioning support is provided with a lifting assembly for lifting the two sliding frames 12; the lifting device comprises two ropes 4, a motor 5 and two limiting rings 13; the motor 5 is mounted on the fixed plate 23; two limiting rings 13 are respectively arranged on the two sliding frames 12; one end of each rope 4 is connected with the output shaft of the motor 5, and the other end of each rope 4 passes through the fixed plate 23 and is connected with each limiting ring 13.

The upper end surface of the cross bar 10 is provided with a plurality of through holes 101; the square frame 7 is provided with a through hole; one end of the swinging plate 8 is movably connected with the balancing weight 3, and the swinging plate 8 is provided with a clamping column 9 for being matched and clamped into the through hole and the through hole 101; the clamping column 9 is externally provided with a rubber ring.

In the embodiment, when in use, a user rotates the swinging plate 8, so that the clamping column 9 is matched and clamped into the through hole and the through hole 101, and the square frame 7 is fixed on the cross rod 10, thereby improving the stability of the device; meanwhile, the clamping column 9 and the cross rod 10 are matched more stably through the rubber ring.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.

Claims

1. The prestress tensioning bracket for the cast-in-situ box girder is characterized by comprising a balancing weight (3), a tensioning jack (6), a return frame (7), a cross rod (10), two sliding frames (12) and a tensioning bracket for installing the cast-in-situ box girder (1);

the cast-in-situ box girder (1) is arranged on the tensioning bracket;

the two sliding frames (12) are both connected with the tensioning support in a sliding manner; two ends of the cross rod (10) are respectively connected with two sliding frames (12), and the projection shape of the cross rod (10) is rectangular; the square frame (7) is arranged on the cross bar (10) in a sliding way; the tensioning jack (6) is arranged on the end face of the square frame (7) facing the cast-in-situ box girder (1); the balancing weight (3) is arranged on the end surface of the square frame (7) far away from the cast-in-situ box girder (1);

the tensioning support is provided with a lifting component for lifting the two sliding frames (12).

2. The cast-in-situ box girder prestress tensioning bracket according to claim 1, characterized in that the tensioning bracket comprises a vertical plate (21), a transverse plate (22), a fixed plate (23), a limiting plate (24) and two connecting plates (25); the vertical plate (21) is connected with the limiting plate (24), and the vertical plate (21) and the limiting plate (24) are mutually vertical; the transverse plate (22) and the fixed plate (23) are arranged on the vertical plate (21) side by side; two connecting plates (25) are distributed side by side, and two ends of each connecting plate (25) are respectively connected with a transverse plate (22) and a fixed plate (23); the two sliding frames (12) are respectively connected with the two connecting plates (25) in a sliding way.

3. The cast-in-situ box girder prestress tensioning bracket of claim 2, further comprising two reinforcing plates; the two ends of each reinforcing plate are respectively connected with the vertical plate (21) and each fixing plate (23).

4. A cast-in-situ box girder prestress tensioning bracket according to claim 2, characterized in that the riser (21) and the limiting plate (24) are of an integrally formed structure.

5. A cast-in-situ box girder prestress tensioning bracket according to claim 1, characterized in that the lifting device comprises two ropes (4), a motor (5) and two limiting rings (13); the motor (5) is arranged on the fixed plate (23); the two limiting rings (13) are respectively arranged on the two sliding frames (12); one end of each rope (4) is connected with an output shaft of the motor (5), and the other end of each rope (4) penetrates through the fixed plate (23) and is connected with each limiting ring (13).

6. The cast-in-situ box girder prestress tensioning bracket according to claim 5, characterized in that two mounting holes for passing through two ropes (4) are arranged on the fixing plate (23); and a round corner is arranged on the inner wall of the mounting hole.

7. A cast-in-situ box girder prestress tensioning bracket according to claim 1, further comprising a swinging plate (8); the upper end surface of the cross rod (10) is provided with a plurality of through holes (101); the square frame (7) is provided with a through hole; one end of the swinging plate (8) is movably connected with the balancing weight (3), and the swinging plate (8) is provided with a clamping column (9) for being matched and clamped into the through hole and the through hole (101).

8. The cast-in-situ box girder prestress tensioning support according to claim 7, characterized in that a rubber ring is arranged outside the clamping column (9).