Temporary support preloading device

Abstract

The application provides a temporary support pre-pressing device, which comprises a temporary support body, a vertical frame is arranged on the top of the periphery of the temporary support body, vertical plates are fixed on the two sides of the vertical frame, a limiting mechanism is arranged on the two sides of the vertical plate perpendicular to the vertical frame, two pressing cylinders are symmetrically arranged between the two vertical plates, the pressing cylinders are in extrusion contact with the top surface of the temporary support body, the positions of the half gears of the pressing cylinders are opposite to the positions of the bidirectional tooth plates in initial engagement, so that the moving directions of the two pressing cylinders are opposite, the two pressing cylinders move synchronously to the two sides of the top surface of the temporary support body, the half gears on the surface of the sliding plate and the bidirectional tooth plates are spaced by a certain distance, the movement of the two groups of bidirectional tooth plates does not collide and does not interfere with each other, the structure occupies a smaller space compared with the prior art, is suitable for any scene, and the pre-pressing of the top of the temporary support is more uniform compared with manual operation, the stress on the top surface of the temporary support is uniform during pre-pressing, so that the flatness of the temporary support is maintained.

Description

A temporary support preloading device Technical Field

[0001] This invention relates to the field of bridge construction, specifically to a temporary support preloading device. Background Technology

[0002] Temporary supports are a crucial and indispensable part of bridge construction. The installation process is as follows: First, temporary supports are installed on the pier tops. Then, precast box girders and T-beams are erected on these temporary supports. After completing processes such as wet joints, wet hinge joints, negative moment tensioning, and grouting, the temporary supports are removed, completing the system conversion. In the past, bricks and wood were used for temporary supports. Generally, two methods are employed: sulfur mortar temporary supports and sand cylinder / sand box temporary supports. The construction method is selected based on the design concept. For a double-support design, the beams are placed on permanent supports in one go. For a single-support design, the beams are first placed on temporary supports or temporary brackets.

[0003] Pre-loading is required when installing temporary supports to ensure the top surface of the timber is level. This ensures that the T-beam will be level when placed on it. A plumb bob is used to check the verticality of the T-beam, and the verticality is adjusted by shimming the end diaphragms. The end diaphragms are then firmly secured to ensure the verticality and stability of the T-beam. Furthermore, the diaphragms and beam head axes must be aligned to ensure the accuracy of the T-beam's position. Current technology typically uses manual or machine flattening for pre-loading temporary supports. Manual flattening is time-consuming and labor-intensive, and it's difficult to accurately control the flatness of the temporary supports. Machine flattening is precise, but requires considerable space for placement. In some specific areas, it's impossible to place large equipment like machine flatteners, rendering them unusable. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a temporary support preloading device to solve the problems mentioned in the background art. The present invention has a novel structure. By driving the two pressure cylinders to press down on the temporary support while sliding to both sides through the driving mechanism, the preloading is kept uniform and the bottom of the temporary support sinks evenly, thereby keeping the top of the temporary support flat.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a temporary support preloading device, comprising a temporary support body, a vertical frame provided on the top periphery of the temporary support body, and vertical plates fixed on both sides of the vertical frame, a limiting mechanism provided on both sides of the vertical frame perpendicular to the vertical plates, two pressure cylinders symmetrically provided between the two vertical plates, and the pressure cylinders pressing against the top surface of the temporary support body, and a driving mechanism installed on one side of the vertical frame to drive the two pressure cylinders to move synchronously in opposite directions to press the temporary support body.

[0006] Furthermore, the limiting mechanism includes a bidirectional screw, which is symmetrically and rotatably mounted on the inner surface of the top of the vertical frame. Two connecting plates are symmetrically meshed and sleeved on the two ends of the bidirectional screw. The connecting plates are slidably connected to the inner surface of the top of the vertical frame, and two limiting plates are symmetrically fixed at the bottom of the connecting plates. The limiting plates are in pressure contact with the top side of the temporary support body.

[0007] Furthermore, the driving mechanism includes a vertical screw, which is rotatably mounted on the surface of a vertical plate on one side of the vertical frame, and a movable plate is engaged with the surface of the vertical screw. Slide plates are fixed at both ends of the bottom of the movable plate, and the slide plates are slidably connected to the vertical plate.

[0008] Furthermore, a drive gear is rotatably mounted on the top surface of the slide plate, and a driven gear is rotatably mounted on the bottom surface of the slide plate. The drive gear and the driven gear are meshed together. A one-way toothed plate is fixed on one side of the drive gear on the vertical plate, and the drive gear is meshed with the one-way toothed plate. The radius of the drive gear is larger than that of the driven gear.

[0009] Furthermore, a half gear is fixed at the shaft center of both the driving gear and the driven gear. The two half gears are initially in opposite directions, and a bidirectional toothed plate is alternately meshed between the two half gears. One end of the pressure cylinder is rotatably mounted on the surface of the bidirectional toothed plate.

[0010] Furthermore, the initial meshing positions of the bidirectional toothed plates of the two pressure cylinders' half-gears are opposite.

[0011] Furthermore, the half-gears and bidirectional toothed plates on the two said slide surfaces are spaced a certain distance apart.

[0012] Furthermore, two slide rails are slidably connected to the surface of the vertical plate on the other side of the vertical frame, and a slider is slidably connected inside the slide rails. The other end of the pressure cylinder is rotatably mounted on the slider.

[0013] The beneficial effects of the present invention: The present invention provides a temporary support preloading device, comprising a temporary support body; a vertical frame; a vertical plate; a slide rail; a slider; a pressure cylinder; a drive mechanism; a vertical screw; a moving plate; a sliding plate; a driving gear; a one-way toothed plate; a driven gear; a half gear; a two-way toothed plate; a limiting mechanism; a limiting plate; a connecting plate; and a two-way screw.

[0014] 1. The temporary support preloading device limits the two sides of the temporary support body under the action of the limiting mechanism to prevent the temporary support from shifting when the pressure cylinder moves to both sides along the surface of the temporary support body.

[0015] 2. Under the action of the driving mechanism, the pressure cylinder of this temporary support preloading device presses down along the top surface of the temporary support body and rolls back and forth, so that the top of the temporary support body is subjected to more uniform force and the flatness of the temporary support body preloading is maintained.

[0016] 3. In this temporary support preloading device, the initial meshing positions of the half gears of the pressure cylinders and the bidirectional toothed plates are opposite, so that the two pressure cylinders move in opposite directions and move synchronously to both sides of the top surface of the temporary support. The half gears and bidirectional toothed plates on the slide plate are spaced a certain distance apart, so that the movement of the two sets of bidirectional toothed plates will not collide and will not interfere with each other.

[0017] 4. This temporary support preloading device maintains the stability of the pressure cylinder when it moves horizontally and vertically through the action of the slide rail and the slider.

[0018] 5. Compared with the prior art, this temporary support preloading device occupies less space, is suitable for any scenario, and provides more uniform preloading to the top of the temporary support than manual operation. It maintains uniform stress on the top surface of the temporary support while preloading, thus maintaining its flatness. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of a temporary support preloading device according to the present invention;

[0020] Figure 2 is a schematic diagram of the limiting mechanism of a temporary support preloading device according to the present invention;

[0021] Figure 3 is a schematic diagram of the vertical plate structure on one side of the vertical frame of a temporary support preloading device according to the present invention;

[0022] Figure 4 is one of the schematic diagrams of the drive mechanism structure of a temporary support preloading device according to the present invention;

[0023] Figure 5 is a second schematic diagram of the drive mechanism structure of a temporary support preloading device according to the present invention;

[0024] In the diagram: 1. Temporary support; 2. Vertical frame; 21. Vertical plate; 22. Slide rail; 23. Slider; 3. Pressure cylinder; 4. Drive mechanism; 41. Vertical screw; 42. Moving plate; 43. Slide plate; 44. Driving gear; 45. One-way gear plate; 46. Driven gear; 47. Half gear; 48. Two-way gear plate; 5. Limiting mechanism; 51. Limiting plate; 52. Connecting plate; 53. Two-way screw. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0026] Please refer to Figures 1 to 5. This invention provides a technical solution: a temporary support preloading device, including a temporary support body 1. A vertical frame 2 is provided on the top of the periphery of the temporary support body 1, and vertical plates 21 are fixed on both sides of the vertical frame 2. Limiting mechanisms 5 are provided on both sides of the vertical frame 2 perpendicular to the vertical plates 21. Two pressure cylinders 3 are symmetrically arranged between the two vertical plates 21, and the pressure cylinders 3 are in pressure contact with the top surface of the temporary support body 1. A driving mechanism 4 is installed on one side of the vertical plate 21 of the vertical frame 2 to drive the two pressure cylinders 3 to move synchronously in opposite directions to compress the temporary support body 1. The temporary support is made of C50 concrete. A total of 4 temporary supports are provided for one main pier (middle support point). The area of ​​a single support (middle support point) is 279.5cm × 55cm. Φ32 threaded steel bars are pre-embedded during the construction of the pier (middle support point). The number of steel bars in each support (middle support point) is: 15 × 3 + 9 = 54 bars, and a total of 4 × (15 × 3 + 9) = 216 bars in each pier (middle support point). The upper end of the reinforcing bar is anchored 1.0m into the bottom of the beam, and the lower end is anchored 1.0m into the pier body. When using the device, the vertical frame 2 is placed around the temporary support, and the pressure cylinder 3 is pressed into contact with the top of the temporary support body 1. Then, the driving mechanism 4 drives the pressure cylinder 3 to press down along the top surface of the temporary support body 1 while rolling back and forth, so that the top of the temporary support body 1 is subjected to more uniform force and the flatness of the pre-compression of the temporary support body 1 is maintained.

[0027] In this embodiment, the limiting mechanism 5 includes a bidirectional screw 53. The bidirectional screw 53 is symmetrically and rotatably mounted on the inner surface of the top of the vertical frame 2, and two connecting plates 52 are symmetrically meshed and sleeved on the two end surfaces of the bidirectional screw 53. The connecting plates 52 are slidably connected to the inner surface of the top of the vertical frame 2, and two limiting plates 51 are symmetrically fixed at the bottom of the connecting plates 52. The limiting plates 51 are in pressure contact with the top side of the temporary support body 1. When the bidirectional screw 53 is rotated, the two connecting plates 52 drive the limiting plates 51 to move closer or further away from each other, thereby limiting the two sides of the temporary support body 1 and preventing displacement when the pressure cylinder 3 moves to both sides along the surface of the temporary support body 1.

[0028] In this embodiment, the driving mechanism 4 includes a vertical screw 41. The vertical screw 41 is rotatably mounted on the surface of the vertical plate 21 on one side of the vertical frame 2, and a movable plate 42 is meshed with the surface of the vertical screw 41. Slide plates 43 are fixed at both ends of the bottom of the movable plate 42, and the slide plates 43 are slidably connected to the vertical plate 21. A driving gear 44 is rotatably mounted on the top surface of the slide plate 43, and a driven gear 46 is rotatably mounted on the bottom surface of the slide plate 43. The driving gear 44 and the driven gear 46 are meshed. A one-way gear plate 45 is fixed on the vertical plate 21 on one side of the driving gear 44, and the driving gear 44 is meshed with the one-way gear plate 45. The radius of the driving gear 44 is larger than that of the driven gear 46. Half gears 4 are fixed at the axis of both the driving gear 44 and the driven gear 46. 7. The two half-gears 47 are initially in opposite directions. The two half-gears 47 are alternately meshed with a bidirectional toothed plate 48. One end of the pressure cylinder 3 is rotatably mounted on the surface of the bidirectional toothed plate 48. Rotating the vertical screw 41 drives the moving plate 42 and the two sliding plates 43 to move vertically along the surface of the vertical plate 21, causing the pressure cylinder 3 to press down on the top surface of the temporary support. At the same time, the driving gear 44 meshes with the unidirectional toothed plate 45 during its descent and meshes with the driven gear 46. The driving gear 44 and the driven gear 46 rotate synchronously in opposite directions. The two half-gears 47 alternately mesh with the two sides of the bidirectional toothed plate 48 in opposite directions, causing the bidirectional toothed plate 48 to move back and forth horizontally. During the process, the pressure cylinder 3 also rolls back and forth along the top surface of the temporary support body 1 to maintain the uniformity of the force on the pre-pressed temporary support.

[0029] In this embodiment, the initial meshing positions of the half gears 47 of the two pressure cylinders 3 with the bidirectional toothed plates 48 are opposite. The half gears 47 and bidirectional toothed plates 48 on the surfaces of the two slide plates 43 are spaced apart by a certain distance. Because the initial meshing positions of the half gears 47 of the pressure cylinders 3 with the bidirectional toothed plates 48 are opposite, the two pressure cylinders 3 move in opposite directions and move synchronously to both sides of the top surface of the temporary support. Because the half gears 47 and bidirectional toothed plates 48 on the surfaces of the slide plates 43 are spaced apart by a certain distance, the movement of the two sets of bidirectional toothed plates 48 will not collide and will not interfere with each other.

[0030] In this embodiment, two slide rails 22 are slidably connected to the surface of the vertical plate 21 on the other side of the vertical frame 2, and a slider 23 is slidably connected inside the slide rail 22. The other end of the pressure cylinder 3 is rotatably mounted on the slider 23. When the slide plate 43 moves vertically along the lower edge driven by the vertical screw 41, the other end of the pressure cylinder 3 slides along the slider 23 and inside the slide rail 22. When the pressure cylinder 3 moves horizontally under the drive of the bidirectional toothed plate 48, the slide rail 22 slides along the surface of the vertical plate 21, maintaining the stability of the pressure cylinder 3 when moving horizontally and vertically.

[0031] When using the device, place the vertical frame 2 around the temporary support, press the pressure cylinder 3 into contact with the top of the temporary support body 1, rotate the vertical screw 41 to drive the moving plate 42 and the two sliding plates 43 to move vertically along the surface of the vertical plate 21, and drive the pressure cylinder 3 to press down on the top surface of the temporary support. At the same time, the driving gear 44 engages with the one-way toothed plate 45 during its descent, and then engages with the driven gear 46. The driving gear 44 and the driven gear 46 rotate synchronously in opposite directions. The two half gears 47 alternately engage with the two sides of the two-way toothed plate 48 in opposite directions, driving the two-way toothed plate 48 to move back and forth horizontally. During this process, the pressure cylinder 3 also rolls back and forth along the top surface of the temporary support body 1 to maintain the uniformity of the force on the pre-pressed temporary support and to maintain the flatness of the pre-pressed temporary support body 1. Rotate the two-way screw 53, and the two connecting plates 52 drive the limiting plates 51 to move closer or further away from each other, limiting the two sides of the temporary support body 1 to prevent the pressure cylinder 3 from shifting when it moves to the sides along the surface of the temporary support body 1.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A temporary support preloading device, comprising a temporary support body (1), characterized in that: The temporary support body (1) is provided with a vertical frame (2) on its outer top, and vertical plates (21) are fixed on both sides of the vertical frame (2). The vertical frame (2) is provided with a limiting mechanism (5) on both sides of the vertical plate (21) perpendicular to the vertical plate (21). Two pressure cylinders (3) are symmetrically arranged between the two vertical plates (21), and the pressure cylinders (3) are in pressure contact with the top surface of the temporary support body (1). A driving mechanism (4) is installed on one side of the vertical plate (21) of the vertical frame (2) to drive the two pressure cylinders (3) to move synchronously in opposite directions to press the temporary support body (1). The limiting mechanism (5) includes a bidirectional screw (53). The bidirectional screw (53) is symmetrically rotated and installed on the inner surface of the top of the vertical frame (2), and two connecting plates (52) are symmetrically meshed and sleeved on the two ends of the bidirectional screw (53). The connecting plates (52) are slidably connected to the inner surface of the top of the vertical frame (2), and two limiting plates (51) are symmetrically fixed at the bottom of the connecting plates (52). The limiting plate (51) is pressed against the top side of the temporary support body (1); the driving mechanism (4) includes a vertical screw (41), the vertical screw (41) is rotatably mounted on the surface of the vertical plate (21) on one side of the vertical frame (2), and a moving plate (42) is meshed on the surface of the vertical screw (41). The bottom ends of the moving plate (42) are fixed with sliding plates (43), and the sliding plates (43) are slidably connected to the vertical plate (21); the top surface of the sliding plate (43) is rotatably mounted with a driving gear (44), and the bottom surface of the sliding plate (43) is rotatably mounted with a driven gear (46). The driving gear (44) and the driven gear (46) are meshed. The vertical plate (21) is fixed with a one-way toothed plate (45) on one side of the driving gear (44), and the driving gear (44) and the one-way toothed plate (45) are meshed. The radius of the driving gear (44) is larger than that of the driven gear (46).

2. The temporary support preloading device according to claim 1, characterized in that: Both the driving gear (44) and the driven gear (46) have half gears (47) fixed at their shafts. The two half gears (47) are initially in opposite directions. The two half gears (47) are alternately meshed and connected by a bidirectional toothed plate (48), and one end of the pressure cylinder (3) is rotatably mounted on the surface of the bidirectional toothed plate (48).

3. The temporary support preloading device according to claim 2, characterized in that: The two half-gears (47) of the pressure cylinders (3) are initially engaged in opposite positions with the bidirectional toothed plates (48).

4. A temporary support preloading device according to claim 3, characterized in that: The half gear (47) and the bidirectional toothed plate (48) on the two surfaces of the two slide plates (43) are spaced a certain distance apart.

5. A temporary support preloading device according to claim 1, characterized in that: Two slide rails (22) are slidably connected to the surface of the vertical plate (21) on the other side of the vertical frame (2), and a slider (23) is slidably connected inside the slide rail (22). The other end of the pressure cylinder (3) is rotatably mounted on the slider (23).

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