Formwork hydraulic active longitudinal sliding mechanism of large box girder precast beam body

Abstract

The utility model relates to the technical field of longitudinal sliding mechanisms, in particular to a formwork hydraulic active longitudinal sliding mechanism of a large box girder precast beam body. In order to solve the problems that when a traditional formwork folding mode is used for coping with a beam body structure change section, due to the fact that rotating shafts are not parallel and collinear, formwork folding conflicts occur, a gap reserving measure is adopted, concrete slurry leakage and slab staggering are caused, and the quality, the appearance and the performance safety of a beam body are affected, the following technical scheme is provided: a top plate is included; the bottom of the top plate is rotationally connected with multiple sets of first hydraulic cylinders. And the two sets of connecting plates are rotationally connected to the two sides of the top plate, the connecting plates are arranged in an L shape, and the two sets of connecting plates are fixedly connected with the output ends of a plurality of sets of first hydraulic cylinders correspondingly. According to the utility model, conflicts caused by non-parallel collinear of template folding rotating shafts can be avoided, gaps do not need to be reserved, the problems of concrete slurry leakage and slab staggering are completely eradicated, and the quality, the appearance and the performance and the safety in actual use of a beam body are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of longitudinal sliding mechanism technology, and in particular to a hydraulic active longitudinal sliding mechanism for templates of precast large box girder beams. Background Technology

[0002] In precast box girder plants, the design and operation of the formwork, especially the inner formwork, are crucial. Traditional formwork folding methods are relatively simple, but they reveal serious problems when dealing with structural transitions in the girder. When the girder structure is in a transitional section, it is difficult to keep the rotation axes on which the formwork folding depends parallel and collinear. This non-parallelism and non-collinearity cause conflicts after the formwork is folded, seriously affecting its normal use.

[0003] To address this issue, previous formwork designs had to employ numerous measures. For example, gaps were pre-reserved during the design phase to avoid conflicts during formwork folding. However, this method has significant drawbacks; pre-reserved gaps lead to frequent grout leakage during concrete pouring, severely impacting the beam's quality and appearance. Furthermore, even with pre-reserved gaps, misalignment cannot be completely eliminated. Misalignment not only reduces the beam's aesthetics but may also affect its performance and safety in actual use. Therefore, this invention proposes a hydraulic active longitudinal sliding mechanism for the formwork of precast box girders. Utility Model Content

[0004] The purpose of this invention is to address the problems in the background technology where traditional template folding methods cause template folding conflicts when dealing with changes in the beam structure due to non-parallel and collinear rotation axes. Furthermore, measures to reserve gaps can lead to concrete leakage and misalignment, affecting the quality, appearance, and performance safety of the beam. This invention proposes a hydraulic active longitudinal sliding mechanism for the template of precast box girder beams.

[0005] The technical solution of this utility model is as follows: A hydraulic active longitudinal sliding mechanism for a precast box girder includes a top plate, with multiple sets of first hydraulic cylinders rotatably connected to the bottom of the top plate; two sets of connecting plates rotatably connected to both sides of the top plate, the connecting plates being L-shaped, each set of connecting plates being fixedly connected to the output ends of the multiple sets of first hydraulic cylinders, and multiple sets of second hydraulic cylinders installed on the inner side of the connecting plates; an end plate rotatably connected to the side of the connecting plates away from the top plate, the end plate being fixedly connected to the output ends of the multiple sets of second hydraulic cylinders; two sets of first moving mechanisms installed between the top plate and the connecting plates, the two sets of first moving mechanisms being used to drive the two sets of connecting plates to slide; and two sets of second moving mechanisms disposed between the connecting plates and the end plates, the second moving mechanisms being used to drive the end plates to slide.

[0006] Optionally, multiple sets of first fixing plates are fixedly connected to both sides of the top plate, and first sliding rods are respectively provided on both sides of the top plate. The two sets of first sliding rods are slidably connected to the multiple sets of first fixing plates on both sides of the top plate. Multiple sets of first positioning rings are fixedly connected to the first sliding rods. The outer ring of the first positioning ring is rotatably connected to a first connecting plate, and the multiple sets of first connecting plates are fixedly connected to the connecting plate.

[0007] Optionally, the connecting plate is fixedly connected to a plurality of second fixing plates on the side near the end plate. A second sliding rod is slidably connected to the plurality of second fixing plates. A plurality of second positioning rings are fixedly connected to the second sliding rods. A second connecting plate is rotatably connected to the outer ring of the second positioning rings. All of the plurality of second connecting plates are fixedly connected to the end plate.

[0008] Optionally, the first moving mechanism includes a third hydraulic cylinder rotatably connected to the bottom of the top plate. The output end of the third hydraulic cylinder is rotatably connected to a first moving seat. A first driving plate is rotatably connected to the first moving seat. A first moving plate is rotatably connected to the end of the first driving plate away from the first moving seat. A first synchronizing block is rotatably connected to the end of the first moving plate away from the first driving plate. A first sleeve is fixedly connected to the end of the first synchronizing block near the first slide rod. The first sleeve is sleeved and installed on the outer ring of the first slide rod. The first sleeve is disposed between two sets of first positioning rings.

[0009] Optionally, a first positioning post is rotatably connected to the middle position of the first drive plate, and the first positioning post is fixedly connected to the top plate.

[0010] Optionally, the second moving mechanism includes a fourth hydraulic cylinder rotatably connected to the inner side of the connecting plate. The output end of the fourth hydraulic cylinder is rotatably connected to a second moving seat. A second drive plate is rotatably connected to the second moving seat. The second drive plate is L-shaped. A second moving plate is rotatably connected to the end of the second drive plate away from the second moving seat. A second synchronizing block is rotatably connected to the end of the second moving plate away from the second drive plate. A second sleeve is fixedly connected to the side of the second synchronizing block near the second slide rod. The second sleeve is sleeved and installed on the outer ring of the second slide rod. The second sleeve is disposed between two sets of second positioning rings.

[0011] Optionally, a second positioning post is rotatably connected to the middle position of the second drive plate, and the second positioning post is fixedly connected to the connecting plate.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] This utility model uses a first hydraulic cylinder and a second hydraulic cylinder to precisely control the angles of the connecting plate and the end plate respectively. At the same time, the third and fourth hydraulic cylinders in the first and second moving mechanisms, together with a series of transmission components, can precisely control the longitudinal sliding position of the connecting plate and the end plate, meet the complex requirements of the precast box girder for the angle and position of the template in different structural change sections, and improve the adaptability and accuracy of the template installation.

[0014] Furthermore, through the design of components such as sliding rods, positioning rings, connecting plates, and sleeves, the relative rotation between components is not hindered while movement is achieved. The components work together to ensure the stability of the template during movement and to flexibly respond to angle and position adjustments under different working conditions. This ensures the reliable operation of the precast box girder template and improves production efficiency and product quality.

[0015] In summary, this utility model can avoid conflicts caused by the non-parallel collinearity of the template folding and rotation axes, eliminates the need for pre-reserved gaps, prevents concrete leakage and misalignment, and effectively improves the quality, appearance, performance and safety of the beam in actual use. Attached Figure Description

[0016] Figure 1 A schematic diagram of a hydraulic active longitudinal sliding mechanism for formwork of a precast large box girder is provided.

[0017] Figure 2 This is a front view of the top slab;

[0018] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 4 for Figure 2 Enlarged diagram of point B in the middle.

[0020] Figure label:

[0021] 1. Top plate; 11. First fixing plate; 12. First sliding rod; 13. First positioning ring; 14. First connecting plate;

[0022] 2. First hydraulic cylinder;

[0023] 3. Connecting plate; 31. Second fixing piece; 32. Second sliding rod; 33. Second positioning ring; 34. Second connecting piece;

[0024] 4. Second hydraulic cylinder;

[0025] 5. End plate;

[0026] 6. First moving mechanism; 61. Third hydraulic cylinder; 62. First moving seat; 63. First drive plate; 64. First moving plate; 65. First synchronizing block; 66. First sleeve; 67. First positioning pin;

[0027] 7. Second moving mechanism; 71. Fourth hydraulic cylinder; 72. Second moving seat; 73. Second drive plate; 74. Second moving plate; 75. Second synchronizing block; 76. Second sleeve; 77. Second positioning column. Detailed Implementation

[0028] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0029] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0030] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Example:

[0034] like Figure 1 and Figure 2 As shown, this utility model proposes a hydraulic active longitudinal sliding mechanism for precast box girder formwork, comprising a top plate 1, with four sets of first hydraulic cylinders 2 rotatably connected to the bottom of the top plate 1. Two sets of connecting plates 3 are rotatably connected to both sides of the top plate 1, the connecting plates 3 being L-shaped, and the two sets of connecting plates 3 are respectively fixedly connected to the output ends of the two sets of first hydraulic cylinders 2, facilitating adjustment of the angle of the connecting plates 3 after the first hydraulic cylinders 2 are activated. Multiple sets of first fixing plates 11 are fixedly connected to both sides of the top plate 1, and first sliding rods 12 are respectively provided on both sides of the top plate 1. The two sets of first sliding rods 12 are slidably connected to the multiple sets of first fixing plates 11 on both sides of the top plate 1. Multiple sets of first positioning rings 13 are fixedly connected to the first sliding rods 12, and first connecting plates 14 are rotatably connected to the outer ring of the first positioning rings 13. The multiple sets of first connecting plates 14 are all fixedly connected to the connecting plates 3, so that the connecting plates 3 rotate around the first sliding rods 12 as the center, and at the same time, when the first sliding rods 12 move along their own length direction, they drive the connecting plates 3 to move synchronously.

[0035] Furthermore, two sets of second hydraulic cylinders 4 are installed on the inner side of the connecting plate 3. The aforementioned longitudinal sliding mechanism also includes an end plate 5 rotatably connected to the side of the connecting plate 3 away from the top plate 1. The end plate 5 is fixedly connected to the output ends of the two sets of second hydraulic cylinders 4, which facilitates the adjustment of the angle of the end plate 5 after the second hydraulic cylinders 4 are started. Multiple sets of second fixing plates 31 are fixedly connected to the side of the connecting plate 3 near the end plate 5. Second slide rods 32 are slidably connected to the multiple sets of second fixing plates 31. Multiple sets of second positioning rings 33 are fixedly connected to the second slide rods 32. Second connecting plates 34 are rotatably connected to the outer ring of the second positioning rings 33. The multiple sets of second connecting plates 34 are all fixedly connected to the end plate 5, so that the end plate 5 rotates around the second slide rod 32 as the center. At the same time, when the second slide rod 32 moves along its own length direction, it drives the end plate 5 to move synchronously.

[0036] For details, please refer to Figure 2 and Figure 4The aforementioned longitudinal sliding mechanism includes two sets of first moving mechanisms 6 installed between the top plate 1 and the connecting plate 3. Each set of first moving mechanisms 6 is used to drive the two sets of connecting plates 3 to slide. Each first moving mechanism 6 includes a third hydraulic cylinder 61 rotatably connected to the bottom of the top plate 1. The output end of the third hydraulic cylinder 61 is rotatably connected to a first moving seat 62. When the third hydraulic cylinder 61 is activated, it drives the first moving seat 62 to move. A first drive plate 63 is rotatably connected to the first moving seat 62. A first moving plate 64 is rotatably connected to the end of the first drive plate 63 away from the first moving seat 62. A first synchronizing block 65 is rotatably connected to the end of the first moving plate 64 away from the first drive plate 63. When the first moving seat 62 moves, it drives the first drive plate 63 to deflect, which in turn drives the first moving plate 64 to deflect and simultaneously drives the first synchronizing block 65 to move. A first sleeve 66 is fixedly connected to the end of the first synchronizing block 65 near the first sliding rod 12. When the first synchronizing block 65 moves, it drives the first sleeve 66 to move synchronously. The first sleeve 66 is fitted onto the outer ring of the first slide rod 12. The first sleeve 66 is positioned between the two sets of first positioning rings 13, facilitating the movement of the first positioning rings 13 and the first connecting piece 14 when the first sleeve 66 moves, thereby moving the connecting plate 3 without hindering the rotation of the connecting plate 3. A first positioning post 67 is rotatably connected to the middle position of the first drive plate 63. The first positioning post 67 is fixedly connected to the top plate 1, allowing the first drive plate 63 to rotate around the first positioning post 67.

[0037] Furthermore, such as Figure 1 and Figure 3As shown, the aforementioned longitudinal sliding mechanism also includes two sets of second moving mechanisms 7 disposed between the connecting plate 3 and the end plate 5. The second moving mechanisms 7 are used to drive the end plate 5 to slide. The second moving mechanism 7 includes a fourth hydraulic cylinder 71 rotatably connected to the inner side of the connecting plate 3. The output end of the fourth hydraulic cylinder 71 is rotatably connected to a second moving seat 72. After the fourth hydraulic cylinder 71 is started, it drives the second moving seat 72 to move. A second drive plate 73 is rotatably connected to the second moving seat 72. The second drive plate 73 is L-shaped. A second moving plate 74 is rotatably connected to the end of the second drive plate 73 away from the second moving seat 72. A second synchronizing block 75 is rotatably connected to the end of the second moving plate 74 away from the second drive plate 73. When the second moving seat 72 moves, it drives the second drive plate 73 to deflect, which in turn drives the second moving plate 74 to deflect and simultaneously drives the second synchronizing block 75 to move. A second sleeve 76 is fixedly connected to the side of the second synchronizing block 75 near the second sliding rod 32. When the second synchronizing block 75 moves, it drives the second sleeve 76 to move synchronously. The second sleeve 76 is fitted onto the outer ring of the second slide rod 32. The second sleeve 76 is positioned between the two sets of second positioning rings 33, facilitating the movement of the second positioning rings 33 and the second connecting piece 34 when the second sleeve 76 moves, thereby moving the end plate 5 without hindering the rotation of the end plate 5. A second positioning post 77 is rotatably connected to the middle position of the second drive plate 73. The second positioning post 77 is fixedly connected to the connecting plate 3, allowing the second drive plate 73 to rotate around the second positioning post 77.

[0038] In this embodiment, four sets of first hydraulic cylinders 2 are activated. The output ends of the first hydraulic cylinders 2 extend and retract, causing the connecting plate 3, which is fixedly connected to them, to rotate around the rotational connection point with the top plate 1, adjusting the angle of the connecting plate 3. At this time, the first slide rod 12 remains relatively stationary among the multiple sets of first fixed plates 11, while the first connecting plate 14 rotates with the connecting plate 3, causing the first positioning ring 13 to rotate around the first slide rod 12, preparing for the subsequent movement of the connecting plate 3 by the first slide rod 12. The third hydraulic cylinder 61 in the two sets of first moving mechanisms 6 installed between the top plate 1 and the connecting plate 3 is activated. The output ends of the third hydraulic cylinder 61 extend or retract, causing the first moving seat 62 to move. During the movement of the first moving seat 62, the first drive plate 63 rotates around the first positioning post 67 and deflects, thereby causing the first moving plate 64 to deflect, causing the first synchronizing block 65 to move. The first synchronization block 65 drives the fixedly connected first sleeve 66 to move on the outer ring of the first slide rod 12. Since the first sleeve 66 is located between the two sets of first positioning rings 13, it pushes the first positioning ring 13 and the first connecting piece 14 to move, and finally drives the connecting plate 3 to slide longitudinally along the length direction of the first slide rod 12.

[0039] The two sets of second hydraulic cylinders 4 inside the connecting plate 3 are activated. The output ends of the second hydraulic cylinders 4 extend and retract, causing the end plate 5, which is fixedly connected to them, to rotate around the rotation connection point with the connecting plate 3, thus adjusting the angle of the end plate 5. During this process, the second slide rod 32 remains relatively stationary among the multiple sets of second fixed plates 31. The second connecting plate 34 rotates with the end plate 5, causing the second positioning ring 33 to rotate around the second slide rod 32, preparing for the subsequent movement of the end plate 5. The fourth hydraulic cylinder 71 in the two sets of second moving mechanisms 7 located between the connecting plate 3 and the end plate 5 is activated. The output ends of the fourth hydraulic cylinder 71 extend or retract, causing the second moving seat 72 to move. The movement of the second moving seat 72 causes the second drive plate 73 to rotate and deflect around the second positioning post 77, causing the second moving plate 74 to deflect, thereby causing the second synchronizing block 75 to move. The second synchronization block 75 drives the fixedly connected second sleeve 76 to move on the outer ring of the second slide bar 32. Since the second sleeve 76 is located between the two sets of second positioning rings 33, it pushes the second positioning rings 33 and the second connecting piece 34 to move, and finally drives the end plate 5 to slide longitudinally along the length direction of the second slide bar 32.

[0040] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A hydraulic active longitudinal sliding mechanism for the formwork of a precast box girder, characterized in that, include: Top plate (1), the bottom of which is rotatably connected to multiple sets of first hydraulic cylinders (2); Two sets of connecting plates (3) are rotatably connected to both sides of the top plate (1). The connecting plates (3) are L-shaped. The two sets of connecting plates (3) are fixedly connected to the output ends of multiple sets of first hydraulic cylinders (2). Multiple sets of second hydraulic cylinders (4) are installed on the inner side of the connecting plates (3). The end plate (5) is rotatably connected to the side of the connecting plate (3) away from the top plate (1), and the end plate (5) is fixedly connected to the output end of multiple sets of second hydraulic cylinders (4); Two sets of first moving mechanisms (6) are installed between the top plate (1) and the connecting plate (3), and the two sets of first moving mechanisms (6) are respectively used to drive the two sets of connecting plates (3) to slide. Two sets of second moving mechanisms (7) are disposed between the connecting plate (3) and the end plate (5). The second moving mechanisms (7) are used to drive the end plate (5) to slide.

2. The hydraulic active longitudinal sliding mechanism for formwork of a large box girder precast beam as described in claim 1, characterized in that, Multiple sets of first fixing plates (11) are fixedly connected to both sides of the top plate (1). A first sliding rod (12) is provided on both sides of the top plate (1). The two sets of first sliding rods (12) are slidably connected to the multiple sets of first fixing plates (11) on both sides of the top plate (1). Multiple sets of first positioning rings (13) are fixedly connected to the first sliding rods (12). A first connecting plate (14) is rotatably connected to the outer ring of the first positioning ring (13). The multiple sets of first connecting plates (14) are fixedly connected to the connecting plate (3).

3. The hydraulic active longitudinal sliding mechanism for formwork of a large box girder precast beam as described in claim 2, characterized in that, The connecting plate (3) is fixedly connected to a plurality of second fixing plates (31) on the side near the end plate (5). A second slide rod (32) is slidably connected in the plurality of second fixing plates (31). A plurality of second positioning rings (33) are fixedly connected on the second slide rods (32). A second connecting plate (34) is rotatably connected to the outer ring of the second positioning rings (33). The plurality of second connecting plates (34) are all fixedly connected to the end plate (5).

4. The hydraulic active longitudinal sliding mechanism for formwork of a large box girder precast beam as described in claim 3, characterized in that, The first moving mechanism (6) includes a third hydraulic cylinder (61) rotatably connected to the bottom of the top plate (1). The output end of the third hydraulic cylinder (61) is rotatably connected to a first moving seat (62). A first driving plate (63) is rotatably connected to the first moving seat (62). A first moving plate (64) is rotatably connected to the end of the first driving plate (63) away from the first moving seat (62). A first synchronizing block (65) is rotatably connected to the end of the first moving plate (64) away from the first driving plate (63). A first sleeve (66) is fixedly connected to the end of the first synchronizing block (65) near the first slide rod (12). The first sleeve (66) is sleeved and installed on the outer ring of the first slide rod (12). The first sleeve (66) is located between two sets of first positioning rings (13).

5. The hydraulic active longitudinal sliding mechanism for formwork of a large box girder precast beam as described in claim 4, characterized in that, The first driving plate (63) is rotatably connected to the first positioning post (67) at the middle position, and the first positioning post (67) is fixedly connected to the top plate (1).

6. The hydraulic active longitudinal sliding mechanism for formwork of a large box girder precast beam as described in claim 5, characterized in that, The second moving mechanism (7) includes a fourth hydraulic cylinder (71) rotatably connected to the inner side of the connecting plate (3). The output end of the fourth hydraulic cylinder (71) is rotatably connected to a second moving seat (72). A second drive plate (73) is rotatably connected to the second moving seat (72). The second drive plate (73) is L-shaped. A second moving plate (74) is rotatably connected to one end of the second drive plate (73) away from the second moving seat (72). A second synchronizing block (75) is rotatably connected to one end of the second moving plate (74) away from the second drive plate (73). A second sleeve (76) is fixedly connected to one side of the second synchronizing block (75) near the second slide rod (32). The second sleeve (76) is sleeved and installed on the outer ring of the second slide rod (32). The second sleeve (76) is located between two sets of second positioning rings (33).

7. The hydraulic active longitudinal sliding mechanism for formwork of a large box girder precast beam as described in claim 6, characterized in that, The second drive plate (73) is rotatably connected to the second positioning post (77) at the middle position, and the second positioning post (77) is fixedly connected to the connecting plate (3).

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