Height-adjustable steel box girder supporting device

Abstract

The utility model discloses a height-adjustable steel box girder supporting device which comprises a hydraulic device arranged at the top of a supporting jig frame. The hydraulic device comprises a bottom plate arranged at the top of the supporting jig frame and a jack arranged on the bottom plate, a top cap is arranged at the output end of the jack, and the steel box girder is supported through the top cap; a limiting assembly is further arranged between the top cap and the bottom plate. The limiting assembly comprises a plurality of spiral supporting rods with adjustable supporting lengths, the spiral supporting rods are symmetrically arranged around the top cap, the height of the supporting top cap is adjustable, material loss caused by measurement errors in the welding and cutting process is avoided, more supporting force can be additionally provided through the limiting assembly, necessary supporting is provided when the jack is unstable, and the stability of the jack is improved. And the device can be manufactured on site by using common materials on a construction site, is easy to disassemble and can be recycled.

Description

Technical Field

[0001] This utility model relates to the field of steel box girder construction technology, and specifically to a height-adjustable steel box girder support device. Background Technology

[0002] During the existing construction of steel box girders, it is necessary to support both sides of the steel box girder to keep it stable at a certain height and angle, so as to facilitate subsequent installation and connection operations.

[0003] In existing technologies, support frames are generally used for support. When installing steel box girders, support frames only need to be set on both sides of a section of steel box girder, which greatly reduces the space utilization rate. The support frame is made of steel components spliced ​​together, and from bottom to top, they are the support frame foundation, the main support body, the distribution beam, the adjustment pipe and the adjustment steel plate.

[0004] For example, patent application number CN202222294935.8 discloses a temporary support structure for a steel box girder viaduct, including multiple support units spaced apart along the direction of the box girder to be supported. Each support unit includes uprights, with ear plates and bolt holes welded to the inner side of the uprights for connecting members. The bottom end of each upright is fixedly connected to a pre-embedded steel plate inside the foundation surface. Multiple sets of vertically connected positive frame units are bolted between adjacent uprights, and multiple sets of negative frame units are located on the sides of the support units. A stable support frame is formed by the crisscrossing members.

[0005] However, the support frame is essentially a support frame welded from steel rods. Its height can only be adjusted by the height of the steel pipes and steel plates themselves. However, due to the complex construction environment on site, the height that can be adjusted by the steel pipes and steel plates generally cannot meet the design height of the bottom surface of the steel box girder, resulting in positive and negative differences in the elevation during the installation of the steel box girder, which affects the construction quality.

[0006] If a significant elevation error is found after the support frame is installed, the original structure must be cut and re-welded. This results in low efficiency in adjusting the height of the support frame, severely impacting the construction progress. Furthermore, conventional height adjustment devices have limited load-bearing capacity and are prone to deformation or instability under the heavy weight of the steel box girder.

[0007] Therefore, there is an urgent need for a steel box girder support device that can adjust the height and has sufficient load-bearing capacity. Utility Model Content

[0008] Due to the aforementioned deficiencies in the existing technology, this application provides a height-adjustable steel box girder support device. The height is adjustable, which avoids material loss during welding and cutting due to measurement errors. The limiting component can provide additional support force and provide necessary support in case of jack instability. Moreover, the device itself can be made on-site using common materials available at the construction site, is easy to disassemble, and can be recycled.

[0009] To achieve the above objectives, this utility model provides a height-adjustable steel box girder support device, including a hydraulic device disposed on the top of the support frame;

[0010] The hydraulic device includes a base plate disposed on the top of the support frame, a jack disposed on the base plate, and a top cap disposed on the output end of the jack, which supports the steel box girder through the top cap;

[0011] Furthermore, a limiting component is provided between the top cap and the bottom plate;

[0012] The limiting component includes multiple adjustable-length spiral struts, which are symmetrically arranged around the top cap to support it.

[0013] The support height is adjustable by using jacks fixed to the top of the support frame, avoiding welding and cutting errors caused by measurement mistakes, as well as material waste during the welding and cutting process. Furthermore, multiple spiral struts are installed between the output end of the jack and the base plate, providing additional support force and necessary support in case of jack instability. Finally, the steel box girder support device provided by this invention can be fabricated on-site using common materials available at the construction site, has a simple structure, is easy to disassemble, and can be recycled.

[0014] In some embodiments, the limiting component further includes a support sleeve and a support plate;

[0015] The bottom of the support sleeve is disposed on the base plate and surrounds the outer periphery of the jack. The support plate is arranged in a ring on the inner surface of the support sleeve. The bottom of the spiral support rod is disposed at the position where the support plate and the support sleeve meet.

[0016] In this configuration, the sleeve is fitted around the outer circumference of the jack to support the support plate, allowing the helical strut to rest on the support plate. Without the support plate, if the helical strut were directly supported from the bottom plate to the top cap, its length would be excessive, making it prone to bending or breakage. In the above technical solution, the sleeve not only supports and secures the jack but also provides support for the strut.

[0017] In some embodiments, a support rod mounting plate is provided at the junction of the support plate and the support sleeve;

[0018] The bottom of the spiral strut is rotatably mounted on the strut mounting plate, and the top of the spiral strut supports the top cap;

[0019] The strut mounting plates are arranged in pairs, and a round steel bar is rotatably arranged between the pair of strut mounting plates.

[0020] The bottom of the spiral strut is disposed on the surface of the round steel, so that the strut mounting plate can support the rotation of the spiral strut.

[0021] This design makes the spiral strut support more stable, and the strut is easier to adjust when the height of the jack changes. In addition, the spiral strut is rotatably mounted on the support plate, forming a whole, which makes it less likely to be lost during transportation and use.

[0022] In some embodiments, a distribution beam is provided on the top of the support frame;

[0023] The base plate is fixed to the upper surface of the distribution beam by bolts and bolt holes, and the central axis of the jack is aligned with the center line of the distribution beam.

[0024] This configuration allows the support tire to support the jack more vertically, resulting in a more even distribution of force on the support tire frame.

[0025] In some embodiments, the top of the cap is provided with a support disk, and the cap is threadedly connected to the support disk;

[0026] The top of the support disc is provided with a constraint cylinder, and the height can be increased by adding a sleeve above the constraint cylinder through threads;

[0027] The support disc is also provided with a number of shims for height adjustment, and the shims have a hole in the center and are fitted onto the constraint rod.

[0028] This design increases the support area of ​​the jack, making the support more stable. On the other hand, multiple shims can be set on the support disc, which allows for coarse adjustment of the height of the entire structure.

[0029] In some embodiments, the helical strut includes an adjusting sleeve with threads on its inner surface and two lead screws. The two lead screws are respectively threaded to both ends of the adjusting sleeve, and the threads of the two lead screws are in opposite directions, so that when the adjusting sleeve rotates, the two lead screws move closer or further apart at the same time.

[0030] With this configuration, the length of the entire spiral strut can be controlled by turning the adjusting sleeve, ensuring that the spiral strut always supports the top cap even when the height of the jack changes.

[0031] In some embodiments, a rotating component is provided between the output end of the jack and the top cap;

[0032] The rotating assembly includes a rotating groove formed at the output end of the jack, and a hollow spherical casting rotatably disposed within the rotating groove;

[0033] The hollow sphere casting is connected to the top cap by threads.

[0034] With this configuration, the top cap can rotate around the jack, allowing for angle adjustments to accommodate different bottom surfaces.

[0035] This application achieves height adjustment of the support frame by using jacks and limiting components set on the top of the support frame, which can be applied to steel box girders with various height requirements. Moreover, the limiting components in this application can also provide support, making the entire structure safer and more reliable when supporting heavy steel box girders. Attached Figure Description

[0036] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their purpose is to illustrate the gist of the invention.

[0037] Figure 1 This is a schematic diagram of a steel box girder support device installed on a support frame in one embodiment of the present invention;

[0038] Figure 2 This is an exploded view of the steel box girder support device in one embodiment of the present invention;

[0039] Figure 3 This is an exploded view of the constrained cylinder in one embodiment of the present invention;

[0040] Figure 4 This is a front view of a spiral strut in one embodiment of the present invention;

[0041] Figure 5 This is a side view of a spiral strut in one embodiment of the present invention.

[0042] Explanation of reference numerals in the attached drawings: 1. Support frame; 11. Distribution beam; 2. Base plate; 3. Jack; 4. Top cap; 41. Rotating groove; 42. Hollow sphere casting; 5. Spiral strut; 51. Stirrer mounting plate; 52. Round steel; 6. Support sleeve; 61. Adjustment hole; 7. Support plate; 8. Support disc; 9. Constraint cylinder; 10. Shim. Detailed Implementation

[0043] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. 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.

[0044] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for 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. Therefore, they should not be construed as limitations on this application. Furthermore, unless otherwise explicitly specified and limited, the terms "installation" and "connection" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. Example

[0046] See Figures 1-4 This embodiment provides a height-adjustable steel box girder support device, including a hydraulic device disposed on the top of the support frame 1;

[0047] The hydraulic device includes a base plate 2, a jack 3 mounted on the base plate 2, and a top cap 4 on the top of the push rod of the jack 3; and supports the steel box girder through the top cap 4.

[0048] A rotating assembly is provided between the push rod of jack 3 and the top cap 4;

[0049] Furthermore, a limit component is provided between the top cap 4 and the bottom plate 2;

[0050] The limiting component includes multiple adjustable-length spiral struts 5, which are symmetrically arranged around the top cap 4 to support it.

[0051] It should be noted that in the existing technology, the installation of steel box girders is limited by the high cost and safety hazards of cranes operating for extended periods. Moreover, in some scenarios, cranes cannot be used for extended periods. Therefore, it is often necessary to temporarily assemble a support frame 1 at the bottom of the steel box girder to support it and improve space utilization. However, due to the complex construction environment, the height of the assembled support frame 1 often differs from the design height of the bottom of the steel box girder to be supported, affecting the construction quality. The existing technology requires cutting and re-welding the support frame 1, resulting in material waste and increased construction procedures.

[0052] In this embodiment, the height is adjusted by setting a jack 3 on the distribution beam 11 at the top of the support frame 1; the limiting component set at the top of the output end of the jack 3 always supports the top cap 4, avoiding the impact of hydraulic jack 3 leakage and instability on the elevation.

[0053] Specifically, multiple bolts are provided on the base plate 2, which is mounted on the distribution beam 11 at the top of the support frame 1 by the bolts, and the central axis of the jack 3 is aligned with the center line of the distribution beam 11.

[0054] See Figures 2 to 5 Specifically, the limiting component also includes a support sleeve 6 and a support plate 7. The support sleeve 6 is barrel-shaped and is fastened around the jack 3. The bottom of the support sleeve 6 is welded to the base plate 2. Near the output end of the jack 3, an annular support plate 7 is welded to the inner surface of the support sleeve 6. The support plate 7 is used to support the spiral strut 5. Specifically, a strut mounting plate 51 is provided at the junction of the support plate 7 and the support sleeve 6. The strut mounting plates 51 are arranged in pairs, and a round steel bar 52 is rotatably arranged between the pair of strut mounting plates 51. The bottom of the spiral strut 5 is set on the surface of the round steel bar 52, so that the strut mounting plate 51 can support the rotation of the spiral strut 5.

[0055] Specifically, the spiral strut 5 includes an adjusting sleeve with threads on its inner surface and two lead screws. The two lead screws are threaded to both ends of the adjusting sleeve, and the threads of the two lead screws are in opposite directions, so that when the adjusting sleeve rotates, the two lead screws move closer or further apart at the same time, thereby controlling the length of the spiral strut 5.

[0056] With this design, the integrated installation of the strut and sleeve prevents the strut from being lost during actual use, and the strut mounting plate 51 provides a support position for the strut, making the support more stable.

[0057] Furthermore, the spiral struts 5 are multiple and arranged around the annular support plate 7, which can support the top cap 4 from multiple angles.

[0058] Specifically, an adjustment hole 61 is provided on the support sleeve 6. The pressing and adjusting rod of the jack 3 extends through the adjustment hole 61, allowing the height of the jack 3 to be adjusted from outside the sleeve. Moreover, this design has lower requirements for the jack 3, eliminating the need for a customized jack 3 and making materials readily available. Reinforcing ribs are also provided at the adjustment hole 61 to compensate for any impact on strength caused by the opening. A hydraulic knob is also provided on the support sleeve 6 to allow operation of the jack 3 from outside the sleeve.

[0059] Specifically, a support disc 8 is threadedly installed on the top of the top cap 4; the top cap 4 has threads on its side, and a matching threaded hole is also provided at the center of the support disc 8.

[0060] See Figure 3 The top of the support disc 8 is fixedly connected to a constraint cylinder 9. The constraint cylinder 9 can be heightened by adding a sleeve through a thread. The support disc 8 is vertically provided with multiple shims 10 for height adjustment. The shims 10 have holes in their centers and are fitted onto the constraint cylinder 9.

[0061] Because steel poles are heavy and difficult to process at the construction site, a cylindrical support is used for the gasket 10 in this embodiment. Preferably, there are four gaskets 10, each with a different thickness. Each gasket 10 has a hole in its center that matches the size of the constraint cylinder 9, allowing gaskets of different thicknesses to be fitted onto the constraint cylinder 9 as needed. Preferably, the four gaskets have thicknesses of 20mm, 10mm, 6mm, and 2mm, respectively. When the gasket 10 is too thick and exceeds the height of the constraint cylinder 9, a new cylinder can be added to the constraint cylinder 9 via threads to increase the height of the constraint cylinder 9.

[0062] In some embodiments, the top of the helical strut 5 is supported on the bottom of the support disk 8, since the angle of the helical strut 5 is adjustable.

[0063] Since the bottom of some steel box girders is not horizontal, the horizontal support disc 8 often struggles to support the inclined bottom of the steel box girder. Therefore, in this embodiment, a rotating assembly is provided between the output end of the jack 3 and the top cap 4. The rotating assembly includes a rotating groove 41 formed at the top of the push rod of the jack 3. In some embodiments, a connecting component is fitted onto the top of the push rod, and the rotating groove 41 is formed on the connecting component. This arrangement avoids creating a groove at the top of the push rod, as the push rod of the jack 3 is often small in size and has high hardness, making groove creation difficult. A hollow spherical casting 42 is rotatably disposed within the rotating groove 41; the hollow spherical casting 42 is connected to the top cap 4 by threads. In this way, the support disc 8 can be deflected at a certain angle without needing to install wedges at the bottom to adjust the angle.

[0064] The adjustment and use process of this device is as follows: The jack 3 and the fixed sleeve are fixed to the base plate 2. The hollow ball casting 42 is placed in the rotating groove 41, and then the hollow ball casting 42 is connected to the bottom of the top cap 4 with bolts, so that the top cap 4 has a certain rotational capacity on the push rod of the jack 3, and can adapt to the bottom surface of the steel box girder at different angles. Next, the support disc 8 is installed on the top of the top cap 4 with bolts. According to the design elevation, a constraint cylinder 9 and a shim 10 of a certain height are set on the support disc 8. The height of the jack 3 is adjusted so that the overall height of the support frame 1 reaches the design elevation of the steel box girder. Then, the length of the spiral strut 5 is adjusted so that the spiral strut 5 can support the top cap 4, preventing leakage and instability of the hydraulic jack 3 from affecting the elevation.

[0065] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0066] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A height adjustable steel box girder support apparatus, characterized by, Including, set up in the hydraulic device of support cradle (1) top; The hydraulic device includes a bottom plate (2) arranged on the top of the support cradle (1), and a jack (3) arranged on the bottom plate (2), wherein the output end of the jack (3) is provided with a top cap (4), and the steel box girder is supported by the top cap (4); And a limiting assembly is further arranged between the top cap (4) and the bottom plate (2); The limiting assembly includes a plurality of screw struts (5) with adjustable support length, and the plurality of screw struts (5) are symmetrically arranged around the top cap (4) to support the top cap (4).

2. The height-adjustable steel box girder support device according to claim 1, characterized in that, The limiting assembly further includes a support sleeve (6) and a support plate (7); The bottom of the support sleeve (6) is arranged on the bottom plate (2) and around the outer periphery of the jack (3), the support plate (7) is annularly arranged on the inner surface of the support sleeve (6), and the bottom of the screw strut (5) is rotatably arranged at the position where the support plate (7) and the support sleeve (6) are connected.

3. The height-adjustable steel box girder support device according to claim 2, wherein The support plate (7) is provided with a support rod mounting plate (51) at the position where the support plate (7) and the support sleeve (6) are connected; The bottom of the screw strut (5) is rotatably arranged on the support rod mounting plate (51), and the top of the screw strut (5) supports the top cap (4).

4. The height-adjustable steel box girder support device according to claim 3, wherein The support rod mounting plates (51) are arranged in pairs, and a round steel (52) is rotatably arranged between the pair of support rod mounting plates (51); The bottom of the screw strut (5) is arranged on the surface of the round steel (52), so that the support rod mounting plate (51) can support the rotation of the screw strut (5).

5. The height-adjustable steel box girder support device according to claim 1, wherein The top of the support cradle (1) is provided with a distribution beam (11); The bottom plate (2) is fixed on the upper surface of the distribution beam (11) by bolts and bolt holes, and the central axis of the jack (3) is aligned with the center line of the distribution beam (11).

6. The height adjustable steel box girder support apparatus according to claim 1, wherein, The top of the top cap (4) is provided with a support disc (8), and the top cap (4) is threadedly connected with the support disc (8); The top of the support disc (8) is provided with a constraint cylinder (9), and a sleeve can be added on the top of the constraint cylinder (9) by screwing to increase the height; A plurality of spacers (10) for height adjustment are further arranged on the support disc (8), and the spacers (10) are arranged on the constraint cylinder (9) with holes in the center.

7. The height-adjustable steel box girder support device according to claim 1, wherein The screw strut (5) includes an adjusting sleeve with threads on the inner surface and two lead screws, the two lead screws are threadedly connected with the two ends of the adjusting sleeve respectively, and the thread directions of the two lead screws are opposite, so that the two lead screws are close to or away from each other when the adjusting sleeve rotates.

8. The height-adjustable steel box girder support device according to claim 1, wherein A rotating assembly is arranged between the output end of the jack (3) and the top cap (4); The rotating assembly comprises a rotating groove (41) arranged at the output end of the jack (3), and a hollow ball casting (42) rotatably arranged in the rotating groove (41); The hollow ball casting (42) is connected with the top cap (4) through threads.

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