Tensioning frame for prestressed bridge construction

Abstract

A tensioning frame for prestressed bridge construction belongs to the technical field of bridge construction and comprises a base, a mounting frame, a plurality of lifting cross beams and a plurality of driving mechanisms capable of driving the lifting cross beams to lift, the mounting frame is fixedly connected onto the base, and the lifting cross beams and the driving mechanisms are arranged correspondingly. The multiple lifting cross beams are connected with the mounting frame in a sliding mode in the vertical direction, and anchoring mechanisms which slide in the horizontal direction and are used for fixing steel strands are arranged on the lifting cross beams. The tensioning frame structure solves the problem that when the height position of a supporting cross beam in an existing tensioning frame structure is adjusted, operation is tedious.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically a tensioning frame for prestressed bridge construction. Background Technology

[0002] Prestressing tensioning involves applying tensile force to a structural member in advance, causing it to bear compressive stress and thus deform to cope with the loads on the structure, including the member's own weight, wind loads, snow loads, etc. A tensioning frame is typically used for prestressing tensioning.

[0003] In existing technologies, such as the tensioning frame structure for prestressed component production disclosed in patent CN220864330U, the height of the steel strand anchor is adjusted by tightening the locking nut to allow the adjusting support beam to slide along the fixed screw, and the horizontal position of the steel strand anchor is adjusted by pushing the anchor fixing seat to slide along the groove. While this tensioning frame structure can meet the requirements for tensioning steel strands in different prestressed components, adjusting the height of the steel strand anchor requires tightening multiple locking nuts to allow the support beam to slide vertically, making the operation rather cumbersome. Utility Model Content

[0004] This invention proposes a tensioning frame for prestressed bridge construction to solve the problem of cumbersome operation when adjusting the height and position of the supporting beams in existing tensioning frame structures.

[0005] To achieve the above objectives, this utility model proposes a tensioning frame for prestressed bridge construction, comprising a base, a mounting frame, a lifting beam, and a drive mechanism capable of raising and lowering the lifting beam.

[0006] The mounting bracket is fixedly connected to the base;

[0007] Multiple lifting beams and multiple drive mechanisms are provided, and they are arranged in a corresponding manner.

[0008] All of the aforementioned lifting beams are slidably connected to the mounting frame in a vertical direction;

[0009] The lifting beam slides horizontally along the anchoring mechanism used to fix the steel strand.

[0010] Preferably, the base includes a base frame and a crossbar;

[0011] The crossbar is fixedly connected inside the base frame, and the mounting bracket is fixedly connected to the upper surface of the base frame.

[0012] Preferably, a connecting post is fixedly connected to the upper surface of the crossbar;

[0013] The connecting post is located on the rear side of the mounting bracket;

[0014] The drive mechanisms are fixed vertically to the connecting column.

[0015] Preferably, the drive mechanism includes a mounting frame and a forward and reverse motor, and a plurality of the mounting frames are vertically fixed on the side of the connecting column near the mounting bracket;

[0016] The forward and reverse motor is fixed inside the mounting frame, and a drive bevel gear is fixed to the output end of the forward and reverse motor;

[0017] A lead screw is rotatably connected between the mounting frame at the lowest part and the crossbar, and the lead screw is rotatably connected between two adjacent mounting frames at the top and bottom;

[0018] The upper end of the lead screw passes through the bottom wall of the mounting frame, and a driven bevel gear is fixed to the upper end of the lead screw. The driven bevel gear meshes with the driving bevel gear.

[0019] Preferably, the mounting frame includes a connecting beam and two support columns;

[0020] The two support columns are fixed to the left and right sides of the bottom frame respectively, and the left and right ends of the connecting beam are fixedly connected to the top of the two support columns respectively.

[0021] The multiple lifting beams slide vertically between the two support columns.

[0022] Preferably, the lifting beam is a rectangular frame structure, and the anchoring mechanism slides horizontally within the lifting beam.

[0023] Preferably, the anchoring mechanism includes a slider and a tool anchor;

[0024] The slider slides horizontally within the lifting beam;

[0025] The slider has a mounting hole in the middle, and the tool anchor is fixed in the mounting hole.

[0026] Preferably, the mounting hole has a groove on its wall and the tool anchor has a retaining edge on its peripheral side, which is engaged in the groove.

[0027] Preferably, a support block is provided in the middle of the lifting beam.

[0028] Preferably, the support block has a connecting block on its side near the connecting column, and the connecting block is threadedly connected to the corresponding lead screw.

[0029] This utility model has the following beneficial effects:

[0030] When adjusting the vertical height of the anchoring mechanism in the tensioning frame, the active bevel gear is driven to rotate by the forward and reverse motor, and the active bevel gear and the driven bevel gear cooperate to drive the screw to rotate, so that the connecting block and the support block drive the lifting beam to move up and down. In this way, the vertical height of each anchoring mechanism can be adjusted, which is convenient and quick. Then, the slider is pushed in the horizontal left and right direction, and the slider drives the tool anchor to move in the horizontal left and right direction, which can adjust the horizontal position of the anchoring mechanism.

[0031] The combination of the slot and the locking edge allows the tool anchor to be more stably fixed in the mounting hole, preventing relative sliding between the tool anchor and the slider.

[0032] 3. Setting support blocks inside the lifting beam not only increases the strength of the lifting beam, but also facilitates the connection between the lifting beam and the lead screw. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of a tensioning frame for prestressed bridge construction according to the present invention.

[0034] Figure 2 This is a schematic diagram showing the connection between the lifting drive mechanism and the lifting beam in a tensioning frame used for prestressed bridge construction, as described in this utility model.

[0035] Figure 3 This is a schematic diagram of the support column in a tensioning frame used in prestressed bridge construction according to the present invention.

[0036] Figure 4 This is a schematic diagram of the connection between the support column and the lifting beam in a tensioning frame for prestressed bridge construction, as described in this utility model.

[0037] Figure 5 This is a schematic diagram of the slider and tool anchor in a tensioning frame for prestressed bridge construction according to the present invention.

[0038] In the diagram: 1. Base; 11. Base frame; 12. Crossbar; 2. Mounting bracket; 21. Support column; 211. Slide groove; 212. Partition plate; 22. Connecting crossbeam; 3. Connecting column; 4. Drive mechanism; 41. Mounting frame; 42. Forward and reverse motor; 43. Driving bevel gear; 44. Driven bevel gear; 45. Lead screw; 5. Lifting crossbeam; 51. Support block; 52. Connecting block; 53. Slide plate; 54. Roller; 6. Slider; 61. Mounting hole; 62. Slot; 7. Tool anchor; 71. Clip. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0040] This utility model proposes a tensioning frame for prestressed bridge construction, such as... Figure 1 As shown, it includes a base 1, a mounting frame 2, a lifting beam 5, and a drive mechanism 4 that can drive the lifting beam 5 to rise and fall. The mounting frame 2 is fixedly connected to the base 1. There are multiple lifting beams 5 and drive mechanisms 4, and they are arranged in a corresponding manner. Multiple lifting beams 5 are slidably connected to the mounting frame 2 in the vertical direction. An anchoring mechanism for fixing steel strands is slidably mounted on the lifting beam 5 in the horizontal direction.

[0041] like Figure 1 As shown, the base 1 includes a base frame 11 and a crossbar 12. The crossbar 12 is fixedly connected inside the base frame 11, and the mounting bracket 2 is fixedly connected to the upper surface of the base frame 11.

[0042] like Figure 1 As shown, a connecting column 3 is fixedly connected to the upper surface of the crossbar 12. The connecting column 3 is located on the rear side of the mounting bracket 2, and multiple drive mechanisms 4 are fixed vertically on the connecting column 3.

[0043] like Figure 2 As shown, the drive mechanism 4 includes a mounting frame 41 and a forward and reverse motor 42. Multiple mounting frames 41 are fixed vertically on the side of the connecting column 3 near the mounting bracket 2.

[0044] The forward and reverse motor 42 is fixed inside the mounting frame 41, and the output end of the forward and reverse motor 42 is fixed with a drive bevel gear 43.

[0045] A lead screw 45 rotates between the lowest mounting frame 41 and the crossbar 12, and a lead screw 45 rotates between two adjacent mounting frames 41.

[0046] The upper end of the lead screw 45 passes through the bottom wall of the mounting frame 41, and a driven bevel gear 44 is fixed to the upper end of the lead screw 45. The driven bevel gear 44 meshes with the driving bevel gear 43.

[0047] like Figure 1 As shown, the mounting frame 2 includes a connecting beam 22 and two support columns 21. The two support columns 21 are fixed on the left and right sides of the bottom frame 11 respectively, and the left and right ends of the connecting beam 22 are fixedly connected to the top of the two support columns 21 respectively.

[0048] Multiple lifting beams 5 slide vertically between two support columns 21.

[0049] like Figure 3 As shown, two vertical grooves 211 are provided on the opposite surfaces of the two support columns 21.

[0050] like Figure 1 As shown, the lifting beam 5 is a rectangular frame structure, and the anchoring mechanism slides horizontally within the lifting beam 5.

[0051] like Figure 1 and Figure 5 As shown, the anchoring mechanism includes a slider 6 and a tool anchor 7. The slider 6 slides horizontally within the lifting beam 5. An installation hole 61 is provided in the middle of the slider 6, and the tool anchor 7 is fixed in the installation hole 61.

[0052] like Figure 5 As shown, a slot 62 is provided on the wall of the mounting hole 61, and a retaining edge 71 is provided on the peripheral side of the tool anchor 7, which is engaged in the slot 62.

[0053] The combination of the slot 62 and the locking ridge 71 allows the tool anchor 7 to be more stably fixed in the mounting hole 61, preventing the tool anchor 7 from sliding relative to the slider 6.

[0054] like Figure 1 and Figure 2 As shown, a support block 51 is provided in the middle of the lifting beam 5.

[0055] like Figure 2 As shown, a connecting block 52 is provided on the side of the support block 51 near the connecting column 3, and the connecting block 52 is threadedly connected to the corresponding lead screw 45.

[0056] The support block 51 installed inside the lifting beam 5 can not only increase the strength of the lifting beam 5, but also facilitate the connection between the lifting beam 5 and the lead screw 45.

[0057] like Figure 3 and 4 As shown, two sliding plates 53 are fixed at both ends of the lifting beam 5, and the sliding plates 53 slide in the slide groove 211;

[0058] Rollers 54 rotate on the outer surface of the slide plate 53. The axis of the rollers 54 is parallel to the axis of the lifting beam 5. The two rollers 54 abut against the two sides of the partition plate 212 between the two slides 211.

[0059] The rollers 54 installed on the slide plates 53 at both ends of the lifting beam 5 can reduce the friction between the lifting beam 5 and the support column 21 and prevent the lifting beam 5 from getting stuck during lifting. At the same time, the partition plate 212 is clamped between the two rollers 54, which can increase the connection stability between the lifting beam 5 and the support column 21.

[0060] Using this utility model, the tensioning frame is first fixed to the ground by the base frame 11. Then, the position of the anchoring mechanism is adjusted according to the position of each bundle of steel strands. The forward and reverse motor 42 is started, which drives the active bevel gear 43 to rotate. The active bevel gear 43 drives the driven bevel gear 44 to rotate, and the driven bevel gear 44 drives the lead screw 45 to rotate. The connecting block 52, which is threaded to the lead screw 45, moves up and down. The connecting block 52 drives the lifting beam 5 to move up and down through the support block 51. In this way, the vertical height of each anchoring mechanism can be adjusted. Then, the slider 6 is pushed in the horizontal left and right direction. The slider 6 drives the tool anchor 7 to move in the horizontal left and right direction. In this way, the horizontal position of the anchoring mechanism can be adjusted, which is convenient and quick. Finally, the steel strands are fixed to the tool anchor 7.

[0061] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A tensioning frame for prestressed bridge construction, characterized in that, The system includes a base (1), a mounting frame (2), a lifting beam (5), and a drive mechanism (4) capable of lifting the lifting beam (5). The base (1) includes a base frame (11) and a crossbar (12). The crossbar (12) is fixedly connected inside the base frame (11), and the mounting frame (2) is fixedly connected to the upper surface of the base frame (11). The mounting frame (2) is fixedly connected to the base (1). Multiple lifting beams (5) and drive mechanisms (4) are provided, and they are arranged correspondingly. Multiple lifting beams (5) are slidably connected to the mounting frame (2) in the vertical direction. An anchoring mechanism for fixing steel strands is slidably mounted on the lifting beams (5) in the horizontal direction. The drive mechanism (4) includes a mounting frame (1) and a drive mechanism (2) for fixing the steel strands. A mounting frame (41) and a reversible motor (42) are provided. Multiple mounting frames (41) are vertically fixed on the side of the connecting column (3) near the mounting bracket (2). The reversible motor (42) is fixed inside the mounting frame (41), and the output end of the reversible motor (42) is fixed with a drive bevel gear (43). A lead screw (45) rotates between the mounting frame (41) at the lowest part and the crossbar (12), and the lead screw (45) rotates between two adjacent mounting frames (41) at the top and bottom. The upper end of the lead screw (45) passes through the bottom wall of the mounting frame (41), and a driven bevel gear (44) is fixed at the upper end of the lead screw (45). The driven bevel gear (44) meshes with the drive bevel gear (43).

2. A tensioning frame for prestressed bridge construction according to claim 1, characterized in that, A connecting column (3) is fixedly connected to the upper surface of the crossbar (12); the connecting column (3) is located on the rear side of the mounting frame (2); a plurality of the driving mechanisms (4) are fixed vertically on the connecting column (3).

3. A tensioning frame for prestressed bridge construction according to claim 1, characterized in that, The mounting frame (2) includes a connecting beam (22) and two support columns (21); the two support columns (21) are fixed to the left and right sides of the bottom frame (11) respectively, and the left and right ends of the connecting beam (22) are fixedly connected to the top ends of the two support columns (21) respectively; multiple lifting beams (5) slide vertically between the two support columns (21).

4. A tensioning frame for prestressed bridge construction according to claim 1, characterized in that, The lifting beam (5) is a rectangular frame structure, and the anchoring mechanism slides horizontally within the lifting beam (5).

5. A tensioning frame for prestressed bridge construction according to claim 1, characterized in that, The anchoring mechanism includes a slider (6) and a tool anchor (7); the slider (6) slides horizontally within the lifting beam (5); a mounting hole (61) is provided in the middle of the slider (6), and the tool anchor (7) is fixed within the mounting hole (61).

6. A tensioning frame for prestressed bridge construction according to claim 5, characterized in that, The mounting hole (61) has a slot (62) on its wall and the tool anchor (7) has a retaining edge (71) on its peripheral side, which is engaged in the slot (62).

7. A tensioning frame for prestressed bridge construction according to claim 1, characterized in that, The lifting beam (5) has a support block (51) in the middle.

8. A tensioning frame for prestressed bridge construction according to claim 7, characterized in that, The support block (51) has a connecting block (52) on its side near the connecting column (3), and the connecting block (52) is threadedly connected to the corresponding lead screw (45).

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