A hydraulic control formwork device for manufacturing a precast box girder

Abstract

The application discloses a hydraulic control formwork device for prefabricated box girder, which comprises a supporting rod, walking devices arranged at both ends of the supporting rod, and multiple groups of inner hydraulic supporting formworks arranged on the supporting rod at intervals. The walking device comprises a support plate, an inclined block fixedly connected to the bottom of the support plate, two inclined rods rotatably connected to the end of the support plate, a supporting shaft rotatably connected to the lower ends of the two inclined rods, and walking wheels arranged at both ends of the supporting shaft. The inclined rods are inwardly attached to the inclined surface of the inclined block. The application is extracted as a whole from the inner cavity of the box girder, and the formwork does not need to be disassembled, so that the turnover efficiency is improved. When the supporting rod needs to be pulled to one side, the inner hydraulic supporting formwork is first folded towards the supporting rod, the auxiliary supporting wheel is supported to the bottom of the inner cavity of the formed box girder, and the inclined rod at the other end contacts the end surface of the box girder and is passively rotated. Under the action of the rotating roller and the walking wheel, the walking device at the one end can rotate and avoid, so that the application is conveniently extracted from the box girder as a whole.

Description

Technical Field

[0001] This invention relates to the field of precast box girder formwork technology, and in particular to a hydraulically controlled formwork device for manufacturing precast box girders. Background Technology

[0002] For the construction of roads and bridges, if on-site construction is not possible, concrete blocks need to be prefabricated at locations outside the construction site. The prefabricated concrete blocks are then transported to the construction site by locomotives. Compared to on-site concrete formwork, precast box girder formwork requires only a small number of formwork devices, and the precast formwork is more standardized with minimal outline error.

[0003] In the prior art, such as the integral hydraulic formwork for box girder prefabrication with patent application number CN201810105984.8, the components used require cumbersome disassembly. In particular, some formwork located inside the box girder cavity requires entry into the box girder for disassembly, resulting in low formwork turnover efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hydraulically controlled template device for manufacturing precast box girders, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hydraulically controlled template device for manufacturing precast box girders includes a support rod with a traveling device at each end. Multiple sets of internal hydraulic support templates are spaced apart on the support rod. The traveling device includes a support plate with a diagonal block fixedly connected to the bottom of the support plate. Two diagonal rods are rotatably connected to the end of the support plate, and the lower ends of the two diagonal rods are rotatably connected to a support shaft. A traveling wheel is provided at each end of the support shaft, and the diagonal rods are inwardly attached to the inclined surface of the diagonal block.

[0007] Preferably, the walking device further includes auxiliary support wheels, with at least two auxiliary support wheels disposed at the bottom of the support rod.

[0008] Preferably, a hook spring is installed between the support plate and the diagonal rod, and a pull ring is fixedly connected to one end of the support plate.

[0009] Preferably, a plurality of rotating rollers are rotatably connected between the two inclined rods.

[0010] Preferably, the internal hydraulic support template includes two upper corner support frames and two lower corner support frames. The two upper corner support frames, the two lower corner support frames, and the upper and lower corner support frames are all connected by inclined block structures. The inclined block structure includes trapezoidal blocks, and dovetail blocks are respectively provided on the inclined surfaces of the trapezoidal blocks. The upper and lower corner support frames are respectively provided with dovetail grooves. The upper and lower corner support frames are respectively connected to the corresponding trapezoidal blocks through dovetail blocks and dovetail grooves. The surface of the support rod is fixedly connected to the trapezoidal blocks, and the hydraulic rod is connected to the trapezoidal blocks.

[0011] Preferably, a guide sleeve is fixedly connected to the side of the trapezoidal block near the hydraulic rod, and a buffer spring is fixedly connected between the telescopic rod of the hydraulic rod and the trapezoidal block.

[0012] The advantages of this invention are as follows: The hydraulic control template device for manufacturing precast box girders provided by this invention first retracts the inner hydraulic support template towards the support rod, and the auxiliary support wheel supports the bottom of the inner cavity of the formed box girder. The inclined rod at the other end contacts the end face of the box girder and rotates passively. Under the action of the rotating roller and the traveling wheel, the traveling device at this end can rotate to avoid the impact, thereby facilitating the extraction of the entire invention from the box girder and improving the demolding efficiency.

[0013] Because the hydraulic rod extends and retracts quickly under hydraulic drive, and the slope angles at both ends of the upper corner support frame are different, there is a lack of synchronization between the two dovetail blocks moving toward the support rod, causing one of them to be delayed. At this time, a buffer spring is needed for elastic compensation. After the hydraulic rod quickly reaches its position, the buffer spring is stretched and then slowly returns to its original position. This can prevent the dovetail block from being unable to slide along the dovetail groove due to the lack of buffering force, thus avoiding jamming and ensuring smooth operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the basic structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the walking device in this invention;

[0016] Figure 3 yes Figure 1 Enlarged view of section E in the image;

[0017] Figure 4 This is a front view of the internal hydraulic support template of the present invention;

[0018] Figure 5 This is a schematic diagram of the demolding state of the hydraulic support template in this invention;

[0019] Figure 6 This is a schematic diagram of the state of the present invention climbing out of the box girder. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] like Figure 1-6 As shown, the present invention provides a hydraulic control template device for manufacturing precast box girders, including a support rod 1, with a traveling device 2 at each end of the support rod 1, and multiple sets of internal hydraulic support templates 3 spaced apart on the support rod 1. The traveling device 2 includes a support plate 21, with a diagonal block 22 fixedly connected to the bottom of the support plate 21, and two diagonal rods 23 rotatably connected to the end of the support plate 21. The lower ends of the two diagonal rods 23 are rotatably connected to a support shaft, and a traveling wheel 24 is provided at each end of the support shaft. The diagonal rods 23 are inwardly attached to the inclined surface of the diagonal block 22.

[0022] The walking device 2 also includes auxiliary support wheels 25, at least two auxiliary support wheels 25 are arranged at the bottom of the support rod 1, a hook spring 26 is installed between the support plate 21 and the inclined rod 23, a pull ring 27 is fixedly connected to one end of the support plate 21, and multiple rotating rollers 28 are rotatably connected between the two inclined rods 23.

[0023] In Example 1, the casting of the box girder 20 requires the placement of a commonly used external support template 10. A casting cavity is formed between the external support template and the internal hydraulic support template 3. When the support rod 1 supports the internal hydraulic support template 3, the support rod 1 provides downward gravity. Then, the lower end of the inclined rod 23 faces inward and is limited by the inclined stop block 22, thus providing stable support. After casting, the internal hydraulic support template 3 detaches from the box girder 20 and applies traction force to the pull ring 27 of the support plate 21, allowing the invention to be extracted from the inner cavity of the box girder 20 as a whole without disassembling the template, thereby improving turnover efficiency. When the support rod 1 needs to be pulled to one side, the internal hydraulic support template 3 first retracts towards the support rod 1, and the auxiliary support wheel 25 supports the bottom of the inner cavity of the formed box girder 10. The inclined rod 23 at the other end contacts the end face of the box girder 10 and rotates passively. Figure 6 As shown on the right, under the action of the rotating roller 28 and the traveling wheel 24, the traveling device 2 at this end can rotate to avoid obstacles, thereby facilitating the extraction of the entire invention from the box girder 20 and improving demolding efficiency; while facing the next pour, it needs to be pulled diagonally by the traction rope as if... Figure 6 As shown on the right, after reaching the position, first use a forklift or lift one end of the support rod 1 separately so that the diagonal rod 23 returns to its original position. Figure 1 After reaching the desired state, the next pour can be carried out, thereby significantly improving the turnover efficiency of the formwork.

[0024] Example 2

[0025] In order to retract the internal hydraulic support template 3 towards the support rod 1, thereby facilitating the removal of the cast box girder 20, based on Embodiment 1, the internal hydraulic support template 3 includes two upper corner support frames 31 and two lower corner support frames 32. The two upper corner support frames 31, the two lower corner support frames 32, and the upper corner support frames 31 and lower corner support frames 32 are all connected by inclined block structures. The inclined block structure includes trapezoidal blocks 33, and dovetail blocks 34 are respectively provided on the inclined surfaces of the trapezoidal blocks 33. The upper corner support frames 31 and lower corner support frames 32 are respectively provided with dovetail grooves 35. The upper corner support frames 31 and lower corner support frames 32 are respectively connected to the corresponding trapezoidal blocks 33 through dovetail blocks 34 and dovetail grooves 35. The surface of the support rod 1 is fixedly connected to the trapezoidal blocks 33, and the hydraulic rods 36 are connected to the trapezoidal blocks 33.

[0026] The trapezoidal block 33 is fixedly connected to the guide sleeve 37 on the side near the hydraulic rod 36, and the telescopic rod of the hydraulic rod 36 is fixedly connected to the trapezoidal block 33 with a buffer spring 38.

[0027] This invention avoids slippage of the upper or lower corner support frame 31 or 32 in its natural state by setting the adapting inclined surfaces of the upper corner support frame 31, lower corner support frame 32, and trapezoidal block 33 to two different inclinations. However, this design has a drawback: when different hydraulic rods 36 move their corresponding dovetail blocks 34 toward the support rod 1, the hydraulic rods 36 extend and retract quickly under hydraulic drive. Because the inclination angles at both ends of the upper corner support frame 31 are different, the two dovetail blocks 34 move asynchronously toward the support rod 1, causing one to be delayed. At this time, the buffer spring 38 is needed for elastic compensation. After the hydraulic rod 36 quickly reaches its position, the buffer spring 38 is stretched and then slowly returns to its original position, achieving the effect shown in the attached figure. Figure 6 The state shown (attached) Figure 6 The diagram only shows the displacement of one of the upper corner support frames 31. It should be noted that the upper corner support frame 31 and the lower corner support frame 32 on the other side will not separate from the trapezoidal block 33. This achieves the effect of bringing the upper corner support frame 31 and the lower corner support frame 32 inward, thus achieving the effect of quick separation from the box girder 20. Together with the support rod 1, they can be quickly removed from the inside of the box girder 20, thereby improving the demolding efficiency.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulically controlled template device for manufacturing precast box girders, comprising a support rod (1) and a box girder (10), wherein a traveling device (2) is provided at both ends of the support rod (1), and multiple sets of internal hydraulic support templates (3) are spaced apart on the support rod (1), characterized in that: The walking device (2) includes a support plate (21), with a slanted block (22) fixedly connected to the bottom of the support plate (21). Two slanted rods (23) are rotatably connected to the ends of the support plate (21), and the lower ends of the two slanted rods (23) are rotatably connected to a support shaft. A walking wheel (24) is provided at each end of the support shaft. The slanted rods (23) are inwardly attached to the inclined surface of the slanted block (22). The walking device (2) also includes auxiliary support wheels (25), at least two of which are auxiliary support wheels. (25) is set at the bottom of the support rod (1). A hook spring (26) is installed between the support plate (21) and the diagonal rod (23). One end of the support plate (21) is fixedly connected to the pull ring (27). When the support rod (1) needs to be pulled to one side, the inner hydraulic support template (3) first retracts to the support rod (1), and the auxiliary support wheel (25) supports the bottom of the inner cavity of the formed box beam (10). The diagonal rod (23) at the other end contacts the end face of the box beam (10) and rotates passively.

2. The hydraulic control template device for manufacturing precast box girders according to claim 1, characterized in that: Multiple rotating rollers (28) are rotatably connected between the two inclined rods (23).

3. A hydraulically controlled template device for manufacturing precast box girders according to any one of claims 1 to 2, characterized in that: The internal hydraulic support template (3) includes two upper corner support frames (31) and two lower corner support frames (32). The two upper corner support frames (31), the two lower corner support frames (32), and the upper corner support frames (31) and the lower corner support frames (32) are all connected by a diagonal block structure. The diagonal block structure includes a trapezoidal block (33). The diagonal surface of the trapezoidal block (33) is provided with dovetail blocks (34). The upper corner support frames (31) and the lower corner support frames (32) are respectively provided with dovetail grooves (35). The upper corner support frames (31) and the lower corner support frames (32) are respectively connected to the corresponding trapezoidal blocks (33) through dovetail blocks (34) and dovetail grooves (35). The surface of the support rod (1) is fixedly connected to the hydraulic rod (36) corresponding to the trapezoidal block (33). The hydraulic rod (36) is connected to the trapezoidal block (33).

4. The hydraulic control template device for manufacturing precast box girders according to claim 3, characterized in that: The trapezoidal block (33) is fixedly connected to the guide sleeve (37) on the side near the hydraulic rod (36), and a buffer spring (38) is fixedly connected between the telescopic rod of the hydraulic rod (36) and the trapezoidal block (33).

Images