Temporary support for positioning control during hoisting of steel box girder

Abstract

The utility model provides a temporary support for positioning control during steel box girder hoisting, which comprises a supporting plate, an adjusting screw rod, a circular sleeve base and a jack which are sequentially distributed from top to bottom, a limiting blind hole is arranged on the lower surface of the supporting plate, an internal thread is arranged on the inner circumferential surface of the circular sleeve base, and the limiting blind hole is communicated with the limiting blind hole. The upper end of the adjusting lead screw is arranged in the limiting blind hole in a penetrating mode, the lower end of the adjusting lead screw is connected into the round sleeve base in a threaded mode, an inserting hole is formed in the circumferential face of the adjusting lead screw, a rotating handle is arranged in the inserting hole in a penetrating mode, and the lower end of the round sleeve base is supported on the jack. The utility model aims to provide the temporary support for positioning control during hoisting of the steel box girder, which can reliably support and accurately adjust the height, and solves the problem that a bridge cannot be accurately supported due to the fact that an existing temporary support is easy to deform.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge hoisting process construction equipment, in particular to a temporary support for positioning control during the hoisting of a steel box girder. Background Art

[0002] Temporary supports are used in the process of hoisting the steel box girder of the bridge. They are usually set outside the permanent supports. The steel box girder is spliced ​​by the temporary supports. After the splicing is completed, the temporary supports are removed to allow the steel box girder to fall to the permanent supports. Existing temporary supports usually use sand barrel temporary supports. The fine sand in the barrel is removed by loosening the bottom screw to open the sand discharge hole. The upper sand barrel is deformed and lowered to complete the removal of the temporary support. Existing temporary supports with sand barrel structures have the following shortcomings: they are easily deformed under the action of the bridge's own gravity, resulting in the displacement of the bridge hoisting position, and the bridge position cannot be accurately and effectively adjusted. Utility Model Content

[0003] The utility model aims to provide a temporary support for positioning control during the installation of a steel box girder, which can reliably support and accurately adjust the height, thereby solving the problem that the existing temporary support is prone to deformation, resulting in the inability to accurately support the bridge.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technology: a temporary support for positioning and controlling when lifting a steel box girder, characterized in that it includes a supporting plate, an adjusting screw, a circular sleeve base and a jack distributed in sequence from top to bottom, a limiting blind hole is provided on the lower surface of the supporting plate, an internal thread is provided on the inner circumferential surface of the circular sleeve base, the upper end of the adjusting screw is inserted into the limiting blind hole, and the lower end is threadedly connected to the circular sleeve base, an insertion hole is provided on the circumferential surface of the adjusting screw, a rotating handle is inserted in the insertion hole, and the lower end of the circular sleeve base is supported on the jack.

[0005] Preferably, a prism section is provided at the lower end of the circular sleeve base, the jack comprises a jack body and a jack head, a prism hole is provided on the upper surface of the jack head, the prism section is inserted into the prism hole, and the prism section cooperates with the prism hole to prevent the circular sleeve base from rotating on the jack head, which can improve the connection reliability and prevent lateral displacement caused by accidental horizontal collision.

[0006] Preferably, the insertion hole is a through hole, and both ends of the rotating handle extend out of the insertion hole, which is convenient for operation.

[0007] Preferably, the upper end of the adjusting screw rod is provided with a large diameter section, and the adjusting screw rod is passed through the large diameter section and is arranged in the position-limiting blind hole.

[0008] Preferably, a lubricating oil layer is filled between the adjusting screw and the limiting blind hole, so as to improve the smoothness when rotating the adjusting screw.

[0009] Preferably, an upper wear-resistant cap is inserted into the position-limiting blind hole, a lower wear-resistant cap is sleeved on the upper end of the adjusting screw rod, and the lower wear-resistant cap is inserted into the upper wear-resistant cap, so as to reduce the wear of the adjusting screw rod when it rotates, so that the utility model can be reused many times.

[0010] Preferably, a lubricating oil layer is filled between the lower wear-resistant cap and the upper wear-resistant cap.

[0011] Preferably, the peripheral wall of the position-limiting blind hole is provided with a plurality of position-limiting blind hole stop grooves distributed along the circumference of the position-limiting blind hole, the position-limiting blind hole stop grooves penetrate the lower surface of the supporting plate, the outer peripheral surface of the upper wear-resistant cap is provided with a plurality of upper wear-resistant cap stop ribs, the upper wear-resistant cap stop ribs are correspondingly arranged in the position-limiting blind hole stop grooves; the peripheral surface of the upper end of the adjusting screw is provided with a plurality of adjusting screw stop grooves distributed along the circumference of the adjusting screw, the adjusting screw stop grooves penetrate the upper end surface of the adjusting screw, the outer peripheral surface of the lower wear-resistant cap is provided with a plurality of lower wear-resistant cap stop ribs, the lower wear-resistant cap stop ribs are correspondingly arranged in the adjustment screw stop grooves. The upper stop cap can be prevented from rotating in the position-limiting blind hole and the lower wear cap from rotating on the adjusting screw, thereby ensuring that the wear during rotation occurs between the upper and lower stop caps.

[0012] Preferably, the upper end of the adjusting screw rod is provided with a large diameter section, the adjusting screw rod stop groove is provided on the large diameter section, and the lower end of the lower wear-resistant cap is higher than the lower end of the large diameter section to form a step. When removing the lower wear-resistant cap from the adjusting screw rod, the lower bottom surface of the lower wear-resistant cap can be knocked upward, which improves the convenience of removing the lower wear-resistant cap from the adjusting screw rod.

[0013] Preferably, the lower end of the upper wear-resistant cap is provided with an outer flange, and a gap for inserting a crowbar is provided between the outer flange and the lower surface of the supporting plate. When removing the upper wear-resistant cap from the limiting blind hole, a crowbar is inserted into the gap and pried downward, or a puller is inserted into the gap and the outer flange is pulled downward to pull the upper wear-resistant cap, thereby improving the convenience of removing the upper wear-resistant cap from the limiting blind hole.

[0014] The utility model has the following beneficial effects: it will not be deformed when under pressure, can reliably support the box girder, so that the steel box girder can be accurately supported; the height can be continuously adjusted, which is convenient for realizing the precise docking of the box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view schematic diagram of the utility model in use state;

[0016] Figure 2 yes Figure 1 A local enlarged schematic diagram of point A;

[0017] Figure 3 yes Figure 1 Schematic diagram of the B-B section.

[0018] In the figure: supporting plate 1, adjusting screw 2, circular sleeve base 3, jack 4, upper wear-resistant cap 5, stop groove 6 of limiting blind hole part, stop rib 7 of upper wear-resistant cap part, outer flange 8, gap 9, large diameter section 22, lower wear-resistant cap 10, stop groove 11 of adjusting screw part, stop rib 12 of lower wear-resistant cap part, step 13, lubricating oil layer 14, rotating handle 15, jack body 16, jack head 17, prismatic section 18, permanent support 21, laser rangefinder 19, box girder 20. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figures 1 to 3A temporary support for positioning and controlling during the hoisting of a steel box girder comprises a supporting plate 1, an adjusting screw 2, a circular sleeve base 3 and a jack 4 which are sequentially arranged from top to bottom. A limit blind hole is arranged on the lower surface of the supporting plate, and an upper wear-resistant cap 5 is inserted into the limit blind hole. Specifically, a plurality of limit blind hole stop grooves 6 distributed along the circumference of the limit blind hole are arranged on the peripheral wall of the limit blind hole, and the limit blind hole stop grooves penetrate the lower surface of the supporting plate. A plurality of upper wear-resistant cap stop ribs 7 are arranged on the outer peripheral surface of the upper wear-resistant cap, and the upper wear-resistant cap stop ribs are correspondingly inserted into the limit blind hole stop grooves. An outer flange 8 is arranged at the lower end of the upper wear-resistant cap, and a gap 9 for inserting a crowbar is arranged between the outer flange and the lower surface of the supporting plate. A large diameter section 22 is arranged at the upper end of the adjusting screw. The large diameter section is sleeved with a lower wear-resistant cap 10, specifically: a plurality of adjusting screw stop grooves 11 distributed along the circumference of the adjusting screw are provided on the circumferential surface of the upper end of the adjusting screw, the adjusting screw stop grooves penetrate the upper end surface of the adjusting screw, a plurality of lower wear-resistant cap stop ribs 12 are provided on the outer circumferential surface of the lower wear-resistant cap, and the lower wear-resistant cap stop ribs are correspondingly inserted into the adjusting screw stop grooves. The lower end of the lower wear-resistant cap is higher than the lower end of the large diameter section to form a step 13. The lower wear-resistant cap is inserted into the upper wear-resistant cap. A lubricating oil layer 14 is filled between the lower wear-resistant cap and the upper wear-resistant cap. An insertion hole is provided on the circumferential surface of the adjusting screw, and a rotating handle 15 is inserted into the insertion hole. The insertion hole is a through hole, and both ends of the rotating handle extend out of the insertion hole. An internal thread is provided on the inner circumferential surface of the circular sleeve base. The lower end of the adjusting screw is threadedly connected in the circular sleeve base. The jack includes a jack body 16 and a jack head 17. The lower end of the circular sleeve base is supported on the jack, specifically: a prism section 18 is provided at the lower end of the circular sleeve base, a prism hole is provided on the upper surface of the jack head, the prism section is inserted into the prism hole, and the prism section cooperates with the prism hole to prevent the circular sleeve base from rotating on the jack head.

[0021] When in use, the utility model is installed near the permanent support 21. According to the on-site construction conditions and the height of the layout, the jack is first adjusted to make a rough adjustment of the height up and down, and then the height is finely adjusted by rotating the adjusting screw by rotating the handle, so that the height of the utility model is higher than the permanent support to meet the protection requirements. The height is detected by the laser rangefinder 19 installed on the lower surface of the support plate. The box girder 20 of the steel frame bridge is hoisted and placed on the support plate of the utility model. According to the data of the laser rangefinder, the seat height of the utility model is adjusted by adjusting the adjusting screw, and the steel frame bridge is accurately controlled to be located at the actual layout position. The jack is slowly adjusted to lower the height of the utility model, so that the box girder is placed on the permanent support, and then the pressure on the jack is relieved to remove the utility model.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temporary support for positioning and controlling during the installation of a steel box girder, characterized in that: It includes a supporting plate, an adjusting screw rod, a circular sleeve base and a jack which are distributed in sequence from top to bottom. A limiting blind hole is provided on the lower surface of the supporting plate, an internal thread is provided on the inner circumferential surface of the circular sleeve base, the upper end of the adjusting screw rod is inserted into the limiting blind hole, and the lower end is threadedly connected to the circular sleeve base, an insertion hole is provided on the circumferential surface of the adjusting screw rod, a rotating handle is inserted into the insertion hole, and the lower end of the circular sleeve base is supported on the jack.

2. A temporary support for positioning control during steel box girder hoisting according to claim 1, characterized in that: A prism section is provided at the lower end of the circular sleeve base, the jack includes a jack body and a jack head, a prism hole is provided on the upper surface of the jack head, the prism section is inserted into the prism hole, and the prism section cooperates with the prism hole to prevent the circular sleeve base from rotating on the jack head.

3. A temporary support for positioning control during steel box girder hoisting according to claim 1 or 2, characterized in that: The insertion hole is a through hole, and both ends of the rotating handle extend out of the insertion hole.

4. A temporary support for positioning control during steel box girder hoisting according to claim 1 or 2, characterized in that: The upper end of the adjusting screw rod is provided with a large diameter section, and the adjusting screw rod is inserted into the limiting blind hole through the large diameter section.

5. A temporary support for positioning control during steel box girder hoisting according to claim 1 or 2, characterized in that: A lubricating oil layer is filled between the adjusting screw rod and the limiting blind hole.

6. A temporary support for positioning control during steel box girder hoisting according to claim 1 or 2, characterized in that: An upper wear-resistant cap is inserted into the position-limiting blind hole, a lower wear-resistant cap is sleeved on the upper end of the adjusting screw rod, and the lower wear-resistant cap is inserted into the upper wear-resistant cap.

7. A temporary support for positioning and controlling the steel box girder during hoisting according to claim 6, characterized in that: A lubricating oil layer is filled between the lower wear-resistant cap and the upper wear-resistant cap.

8. The temporary support for positioning and controlling the steel box girder during hoisting according to claim 6, characterized in that: The peripheral wall of the limiting blind hole is provided with a plurality of stopping grooves of the limiting blind hole distributed along the circumference of the limiting blind hole, the stopping grooves of the limiting blind hole pass through the lower surface of the supporting plate, the outer peripheral surface of the upper wear-resistant cap is provided with a plurality of stopping ribs of the upper wear-resistant cap, the stopping ribs of the upper wear-resistant cap are respectively passed through the stopping grooves of the limiting blind hole; the peripheral surface of the upper end of the adjusting screw is provided with a plurality of stopping grooves of the adjusting screw distributed along the circumference of the adjusting screw, the stopping grooves of the adjusting screw pass through the upper end surface of the adjusting screw, the outer peripheral surface of the lower wear-resistant cap is provided with a plurality of stopping ribs of the lower wear-resistant cap, the stopping ribs of the lower wear-resistant cap are respectively passed through the stopping grooves of the adjusting screw.

9. A temporary support for positioning control during steel box girder hoisting according to claim 8, characterized in that: The upper end of the adjusting screw rod is provided with a large diameter section, the anti-rotation groove of the adjusting screw rod is arranged on the large diameter section, and the lower end of the lower wear-resistant cap is higher than the lower end of the large diameter section to form a step.

10. A temporary support for positioning and controlling the installation of a steel box girder according to claim 6, characterized in that: The lower end of the upper wear-resistant cap is provided with an outer flange, and a gap for inserting a crowbar is provided between the outer flange and the lower surface of the supporting plate.

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