An adjusting device for tensioning concrete cast-in-place box beams

Abstract

The utility model discloses an adjusting device for tensioning a cast-in-place concrete box girder. The utility model moves the device to a steel bundle that needs to be tensioned by means of a universal wheel arranged at the bottom of a frame, and by rotating a first turntable, the first turntable drives a screw rod to rotate, and the rotating screw rod drives a connecting seat to move under the guiding action of a T-shaped guide seat through a screw rod sleeve, and the lateral position of the tensioning jack is adjusted by stepping on a pedal of a foot-operated hydraulic cylinder assembly, and the movable end of the foot-operated hydraulic cylinder assembly pushes a scissor lifting rod under the guiding action of a roller and a slot through a cross brace, so as to adjust the height of the lifting platform, thereby adjusting the height of the tensioning jack, and pushing the device to facilitate the steel bundle to pass through the tensioning jack, thereby reducing the difficulty of operation for the staff, and by rotating the screw rod through the second turntable to drive the screw rod to rotate, and the bottom end of the screw rod is fully in contact with the ground, so that the device is fixed and the device is prevented from moving when in use.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal bridge construction, in particular to an adjusting device for tensioning a concrete cast-in-place box beam. Background Art

[0002] After the pouring of concrete for the continuous span cast-in-place box girder section is completed, the operating positions of the tensioning jacks for the prestressed steel strands on both sides of the cast-in-place beam are in a high and suspended state, and the height and position of the tensioning jacks need to be adjusted. Since the tensioning jacks and the supporting equipment are large and heavy, it is very troublesome to adjust the jacks and the supporting equipment after tensioning a group of steel strands. In view of the above problems, an adjustment device for tensioning concrete cast-in-place box girders is proposed. Utility Model Content

[0003] The utility model aims to provide a regulating device for tensioning a cast-in-place concrete box girder to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A regulating device for tensioning a cast-in-place concrete box girder comprises a frame, a lifting platform is arranged on the top of the frame, scissor lifting rods are symmetrically arranged between the lifting platform and the frame, two ends of one side of the scissor lifting rods are rotatably connected with the corresponding frame and the scissor lifting rods, the other end of the scissor lifting rods is rotatably connected with a roller, the roller is built in a guide groove, the guide groove is fixedly installed in the corresponding frame and the lifting platform, a cross brace is arranged between the scissor lifting rods, a foot-operated hydraulic cylinder assembly is arranged in the frame, and the movable end of the foot-operated hydraulic cylinder assembly is rotatably connected with the cross brace Connection, a T-shaped guide seat is fixedly installed on the top of the lifting platform, a sliding groove is opened in the T-shaped guide seat, a screw sleeve is slidably connected in the sliding groove, a screw is rotatably connected in the sliding groove, the screw passes through the screw sleeve, and the screw and the screw sleeve are threadedly connected, one end of the screw passes through the T-shaped guide seat and is fixedly connected to the first turntable, a connecting seat is provided on the T-shaped guide seat, a slot is opened at the bottom of the connecting seat, the T-shaped guide seat is clamped in the slot, and the T-shaped guide seat is slidably connected to the slot, the screw sleeve is fixedly installed in the slot of the connecting seat, and a tensioning jack is fixedly installed on the top of the connecting seat.

[0006] As a further solution of the utility model: universal wheels are fixedly installed at the four corners of the bottom of the frame, and fixing mechanisms are fixedly installed at the front and rear ends of both sides of the frame.

[0007] As a further solution of the utility model: the fixing mechanism includes a transverse plate, a screw rod is connected to the threaded portion penetrating the transverse plate, and a second rotating disk is fixedly mounted on the top end of the screw rod above the transverse plate.

[0008] As a further solution of the utility model: a push rod is fixedly installed on the top of the frame, and an anti-skid rubber sleeve is sleeved on the push rod.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The utility model moves the device to the steel bundle that needs to be tensioned by the universal wheel arranged at the bottom of the frame, and drives the screw rod to rotate by rotating the first turntable, and the rotating screw rod drives the connecting seat to move under the guidance of the T-shaped guide seat through the screw rod sleeve. The lateral position of the tensioning jack is adjusted by stepping on the pedal of the foot-operated hydraulic cylinder assembly, and the movable end of the foot-operated hydraulic cylinder assembly pushes the scissor lifting rod under the guidance of the roller and the slot through the cross brace to move, thereby adjusting the height of the lifting platform, thereby adjusting the height of the tensioning jack, pushing the device, making it convenient for the steel bundle to pass through the tensioning jack, and reducing the difficulty of operation for the staff.

[0011] 2. The utility model rotates the screw rod by the second rotating disk, drives the screw rod to rotate, and the bottom end of the screw rod is in full contact with the ground, so that the device is fixed to prevent the device from moving when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a structural schematic diagram of an adjusting device for tensioning a cast-in-place concrete box girder.

[0013] Figure 2 The present invention is a cross-sectional view of an adjusting device for tensioning a cast-in-place concrete box girder.

[0014] Figure 3 The present invention is a partial cross-sectional view of a T-shaped clip in an adjusting device for tensioning a cast-in-place concrete box girder.

[0015] Figure 4 for Figure 1 A partial enlarged view of point A in the middle.

[0016] In the figure: 1. frame; 2. universal wheel; 3. lifting platform; 4. scissor lifting rod; 5. cross brace; 6. foot-operated hydraulic cylinder assembly; 7. push rod; 8. T-type guide seat; 9. connecting seat; 10. tensioning jack; 11. guide groove; 12. roller; 13. slot; 14. screw sleeve; 15. slide groove; 16. screw; 17. first turntable; 18. cross plate; 19. screw; 20. second turntable. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figures 1 to 4 In the embodiment of the utility model, an adjusting device for tensioning a cast-in-place concrete box girder comprises a frame 1, a lifting platform 3 is arranged on the top of the frame 1, a scissor lift rod 4 is symmetrically arranged between the lifting platform 3 and the frame 1, two ends of one side of the scissor lift rod 4 are rotatably connected with the corresponding frame 1 and the scissor lift rod 4, and a roller 12 is rotatably connected with the other end of the scissor lift rod 4, and the roller 12 is built in a guide groove 11, and the guide groove 11 is fixedly installed in the corresponding frame 1 and the lifting platform 3, a cross brace 5 is arranged between the scissor lift rod 4, and a foot-operated hydraulic cylinder assembly 6 is arranged in the frame 1, and the movable end of the foot-operated hydraulic cylinder assembly 6 is rotatably connected with the cross brace 5, the foot-operated hydraulic cylinder assembly 6 is an existing part, and the foot-operated hydraulic cylinder assembly 6 is composed of a hydraulic cylinder and a foot-operated hydraulic pump, and is a prior art, and the model of the foot-operated hydraulic pump is Wanding / PEXP, and the movable end of the hydraulic cylinder is rotatably connected with the cross brace 5, and the hydraulic cylinder The tail end is rotatably connected with the frame 1, the foot-operated hydraulic pump is installed at the bottom of the frame, and the foot pedal in the foot-operated hydraulic pump of the foot-operated hydraulic cylinder assembly 6 extends from the bottom of the frame 1, which is convenient for the staff to step on the foot pedal of the foot-operated hydraulic cylinder assembly 6. A T-shaped guide seat 8 is fixedly installed on the top of the lifting platform 3, and a slide groove 15 is opened in the T-shaped guide seat 8. A screw sleeve 14 is slidably connected in the slide groove 15. A screw rod 16 is rotatably connected in the slide groove 15, and the screw rod 16 passes through the screw sleeve 14, and the screw rod 16 is threadedly connected to the screw sleeve 14. One end of the screw rod 16 passes through the T-shaped guide seat 8 and is fixedly connected to the first turntable 17. A connecting seat 9 is provided on the T-shaped guide seat 8, and a card slot 13 is opened at the bottom of the connecting seat 9. The T-shaped guide seat 8 is carded in the card slot 13, and the T-shaped guide seat 8 is slidably connected to the card slot 13. The screw sleeve 14 is fixedly installed in the card slot 13 of the connecting seat 9, and a tensioning jack 10 is fixedly installed on the top of the connecting seat 9.

[0019] When in use, by rotating the first turntable 17, the first turntable 17 drives the screw rod 16 to rotate, and the rotating screw rod 16 drives the connecting seat 9 to move under the guidance of the T-shaped guide seat 8 through the screw rod sleeve 14, and the lateral position of the tensioning jack 10 is adjusted by stepping on the pedal of the foot-operated hydraulic cylinder assembly 6. The movable end of the foot-operated hydraulic cylinder assembly 6 pushes the scissor lifting rod 4 under the guidance of the roller 12 and the slot 13 through the cross brace 5 to move, thereby adjusting the height of the lifting platform 3, thereby adjusting the height of the tensioning jack 10, and achieving the position of the tensioned steel bundle.

[0020] Universal wheels 2 are fixedly installed at the four corners of the bottom of the frame 1, and fixing mechanisms are fixedly installed at the front and rear ends of both sides of the frame 1. By arranging the universal wheels 2 at the bottom of the frame 1, the movement of the device is facilitated. When the device is moved to a suitable position, the device is fixed by the fixing mechanism to prevent the device from moving during use.

[0021] The fixing mechanism includes a transverse plate 18, a screw rod 19 is connected to a thread passing through the transverse plate 18, a second turntable 20 is fixedly installed on the top of the screw rod 19 above the transverse plate 18, and the bottom end of the screw rod 19 is hemispherical. The screw rod 19 is driven to rotate by rotating the second turntable 20, and the bottom end of the screw rod 19 is in full contact with the ground, so that the device is fixed.

[0022] A push rod 7 is fixedly mounted on the top of the frame 1 , and a non-slip rubber sleeve is sleeved on the push rod 7 , and the push rod 7 is used to push the device to move.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjusting device for tensioning a cast-in-place concrete box girder, comprising a frame (1), characterized in that: The frame (1) is provided with a lifting platform (3) on the top, and a scissor lifting rod (4) is symmetrically provided between the lifting platform (3) and the frame (1). The two ends of one side of the scissor lifting rod (4) are rotatably connected to the corresponding frame (1) and the scissor lifting rod (4). The other end of the scissor lifting rod (4) is rotatably connected to a roller (12). The roller (12) is built into a guide groove (11). The guide groove (11) is fixedly installed in the corresponding frame (1) and the lifting platform (3). A cross brace (5) is provided between the scissor lifting rods (4). A foot-operated hydraulic cylinder assembly (6) is provided in the frame (1). The movable end of the foot-operated hydraulic cylinder assembly (6) is rotatably connected to the cross brace (5). A T-shaped guide seat (8) is fixedly installed on the top of the lifting platform (3). The T-shaped guide seat ( A slide groove (15) is provided in the slide groove (15), a screw sleeve (14) is slidably connected in the slide groove (15), a screw rod (16) is rotatably connected in the slide groove (15), the screw rod (16) passes through the screw sleeve (14), and the screw rod (16) is threadedly connected to the screw sleeve (14), one end of the screw rod (16) passes through the T-shaped guide seat (8) and is fixedly connected to the first turntable (17), a connecting seat (9) is provided on the T-shaped guide seat (8), a slot (13) is provided at the bottom of the connecting seat (9), the T-shaped guide seat (8) is clamped in the slot (13), and the T-shaped guide seat (8) is slidably connected to the slot (13), the screw sleeve (14) is fixedly installed in the slot (13) of the connecting seat (9), and a tensioning jack (10) is fixedly installed on the top of the connecting seat (9).

2. The adjusting device for tensioning a cast-in-place concrete box girder according to claim 1, characterized in that: Universal wheels (2) are fixedly mounted at the four corners of the bottom of the vehicle frame (1), and fixing mechanisms are fixedly mounted at both front and rear ends of both sides of the vehicle frame (1).

3. The adjusting device for tensioning a cast-in-place concrete box girder according to claim 2, characterized in that: The fixing mechanism comprises a transverse plate (18), a screw rod (19) is connected to a thread passing through the transverse plate (18), and a second rotating disk (20) is fixedly mounted on the top of the screw rod (19) above the transverse plate (18).

4. The adjusting device for tensioning a cast-in-place concrete box girder according to claim 1, characterized in that: A push rod (7) is fixedly mounted on the top of the vehicle frame (1), and an anti-slip rubber sleeve is sleeved on the push rod (7).

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