A device for height adjustment of a bridge crane outrigger column

Abstract

The utility model discloses a device for bridge floor crane support leg stand column height adjustment, the device mainly comprises fixed block group, distribution crossbeam, hydraulic system and pull rod, and the principle of the adjusting device is as follows: when the height that needs to be adjusted is clear, every 0.5m is adjusted through a fixed block, and the remaining height less than 0.5m is adjusted through a jack. For example: when the crane support leg stand column needs to be adjusted to 2.1m, 4 blocks are used to reach 2.0m, and the remaining 0.1m is adjusted through an accurate jacking jack, so that the overall height of the support leg reaches the target value of 2.1m, that is, coarse adjustment 2.0m+ fine adjustment 0.1m. The utility model solves the problems that (1) in the working condition of the slope bridge, the height adjustment efficiency and accuracy of the support leg are difficult to be considered; (2) the safety hidden trouble problem caused by the insufficient tensile capacity of the hydraulic jack.

Description

Technical Field

[0001] This utility model relates to the field of segmental assembly construction of long-span steel truss bridges, specifically to a device for adjusting the height of the outrigger columns of a bridge deck crane. Background Technology

[0002] In the segmental assembly construction of long-span steel truss bridges, the bridge deck crane is a critical piece of equipment. It needs to stand on already installed beam segments to lift subsequent new segments. Because the installed steel truss may have design slopes or construction errors in its elevation, the supporting foundation of the bridge deck crane (i.e., the bridge deck) may not be level. Therefore, the outriggers of the bridge deck crane must have height adjustment capabilities to adjust the levelness of the crane body, ensuring its stable and safe operation.

[0003] Currently, the common methods for adjusting outrigger height are pure block support and pure hydraulic jack support. The block support method uses steel blocks or combinations of steel sections of varying thicknesses to raise the outrigger. Its disadvantage is low adjustment precision: the block specifications are fixed (e.g., each block is 0.5m thick). When the outrigger column needs to be adjusted to a non-standard height (e.g., 2.1m), only four blocks can reach a height of 2.0m, leaving a 0.1m height difference that cannot be accurately compensated. This results in the outrigger not fully contacting the bridge deck or insufficient leveling precision of the crane, affecting the accuracy and safety of the lifting operation.

[0004] The pure hydraulic jack support method directly uses hydraulic jacks as the extension ends of the outriggers. Its disadvantage is the limited jacking stroke, making large-scale height adjustments difficult: the jacking stroke of a hydraulic jack is limited by the length of its cylinder, typically resulting in a limited stroke. When a large height adjustment of several meters is required, a single jack is simply insufficient. Even with jacks using longer strokes, the lifting efficiency is low, hindering rapid adjustments and severely impacting construction progress.

[0005] Furthermore, hydraulic jacks cannot withstand tensile forces, resulting in poor safety. The hydraulic cylinder of a hydraulic jack is essentially a compression component, and its structural design dictates its extremely weak tensile strength. During crane operation, factors such as bridge vibration, wind, or sudden load changes may cause the outriggers to experience instantaneous upward tensile forces. In such cases, the jack support structure alone cannot effectively resist these forces, potentially leading to cylinder damage, outrigger detachment from the support point, and serious safety accidents. Utility Model Content

[0006] Therefore, in order to solve the above-mentioned shortcomings, this utility model provides a device for adjusting the height of the outrigger column of a bridge deck crane, which solves the problems of (1) difficulty in balancing the adjustment efficiency and accuracy of the outrigger height under sloping bridge deck conditions; and (2) safety hazards caused by insufficient tensile strength of hydraulic jacks.

[0007] This utility model is implemented as follows: a device for adjusting the height of the outrigger column of a bridge deck crane is constructed, characterized in that: the device is installed between the bottom end of the outrigger column and the bridge deck, and the device mainly consists of a fixing block assembly, a distribution beam, a hydraulic system, and tie rods; wherein the fixing block assembly is composed of multiple high-strength steel pads of standard height stacked together, and the lower end is rigidly connected to the upper end of the distribution beam by bolts; the distribution beam is a steel beam, and its core function is to evenly distribute the concentrated load transmitted from the fixing block assembly above; the hydraulic system mainly includes a hydraulic jack, the bottom of the jack cylinder rests on the bridge deck, and the top end of its piston rod is connected to the bottom of the distribution beam; two high-strength steel tie rods are symmetrically arranged on both sides of the hydraulic jack, the upper end of the tie rod passes through the reserved hole of the distribution beam and is fixed to the distribution beam by an upper nut, and the lower end of the tie rod is fixed to the foundation anchor on the bridge deck by a lower nut.

[0008] The device for adjusting the height of the outrigger column of a bridge crane according to this utility model is characterized by the following principle: After determining the height to be adjusted, adjustments are made every 0.5m using a fixed block, and the remaining height less than 0.5m is adjusted using a jack. For example, when the outrigger column needs to be adjusted to a height of 2.1m, four shims are used to reach a height of 2.0m, and the remaining 0.1m is adjusted using a precision lifting jack, so that the overall height of the outrigger reaches the target value of 2.1 meters, i.e., a coarse adjustment of 2.0m + a fine adjustment of 0.1m.

[0009] Compared with the prior art, the height adjustment device for the outrigger column of the bridge deck crane provided by this patent has the following advantages: (1) It achieves rapid positioning at a large height through the "fixed block group", overcoming the problem of low efficiency when simply using jacks for large-scale lifting. The "hydraulic system" is used for millimeter-level precise fine adjustment, making up for the deficiency of insufficient precision when simply using shims for adjustment. This "coarse adjustment + fine adjustment" mode makes the outrigger height adjustment work both fast and precise, significantly improving construction efficiency and quality.

[0010] (2) An independent tensile force transmission path is constructed by connecting the "pull rods" and "distribution beams" on both sides of the hydraulic system. Under normal working conditions, the load is borne by the boom (under tension); when the outrigger experiences an unexpected upward pull, this pull is directly transmitted to the boom through the distribution beam, thus completely avoiding tension on the hydraulic jack cylinder. This fundamentally eliminates the major safety hazard of equipment overturning or damage that may be caused by the cylinder's inability to withstand tension, ensuring the safety and reliability of the device.

[0011] (3) The fixed block group and the distribution beam are rigidly connected by bolts to form a stable whole unit, which enhances the overall rigidity and stability of the support structure, effectively resists vibration and impact during construction, prevents the pad block from shifting or overturning, and ensures the absolute stability of the support foundation.

[0012] (4) The fixing blocks can be added or removed as needed, making them suitable for different height requirements and highly versatile. At the same time, the modular design also facilitates disassembly, transportation, and replacement and maintenance, reducing the cost of use and maintenance. Attached Figure Description

[0013] Figure 1 This is an elevation view of the regulating device; Figure 2 This is a cross-sectional view of the regulating device.

[0014] The components include: 1. Fixed block assembly; 2. Distribution beam; 3. Hydraulic system; 4. Tie rod; and 5. Support leg column. Detailed Implementation

[0015] The following will be combined with the appendix Figures 1-2 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0016] This utility model provides a device for adjusting the height of the outrigger columns of a bridge crane, such as... Figures 1-2 As shown, it can be implemented in the following manner; the adjustment device described in this patent is installed between the bottom end of the support column 5 and the bridge deck. The device mainly consists of a fixing block group 1, a distribution beam 2, a hydraulic system 3 and a tie rod 4.

[0017] The fixed block group 1 is composed of multiple high-strength steel pads of standard height stacked together, with the lower end rigidly connected to the upper end of the distribution beam 2 by bolts. The distribution beam 2 is a steel beam, whose core function is to evenly distribute the concentrated load transmitted from the fixed block group 1 above. The hydraulic system 3 mainly includes hydraulic jacks, with the bottom of the jack cylinder resting on the bridge deck and the top of its piston rod connected to the bottom of the distribution beam 2. Two high-strength steel tie rods 4 are symmetrically arranged on both sides of the hydraulic jacks. The upper end of the tie rod 4 passes through the reserved hole of the distribution beam 2 and is fixed to the distribution beam 2 by the upper nut. The lower end of the tie rod 4 is fixed to the foundation anchor on the bridge deck by the lower nut.

[0018] The principle of this patented adjustment device is as follows: Once the required adjustment height is determined, adjustments are made every 0.5m using a fixed block, and the remaining height less than 0.5m is adjusted using a jack. For example, when the crane outrigger column needs to be adjusted to a height of 2.1m, four shims are used to reach a height of 2.0m, and the remaining 0.1m is adjusted using a precision lifting jack, so that the overall height of the outrigger reaches the target value of 2.1 meters, i.e., a coarse adjustment of 2.0m + a fine adjustment of 0.1m.

[0019] What are the advantages and benefits of this patent? Compared with existing technologies, the height adjustment device for the outrigger columns of bridge cranes provided in this patent has the following advantages: (1) The "fixed block group" enables rapid positioning at great heights, overcoming the inefficiency of using jacks for large-scale jacking. The "hydraulic system" enables precise millimeter-level adjustments, compensating for the insufficient precision of adjusting with shims alone. This "coarse adjustment + fine adjustment" mode makes the outrigger height adjustment work both fast and accurate, significantly improving construction efficiency and quality.

[0020] (2) An independent tensile force transmission path is constructed by connecting the "pull rods" and "distribution beams" on both sides of the hydraulic system. Under normal working conditions, the load is borne by the boom (under tension); when the outrigger experiences an unexpected upward pull, this pull is directly transmitted to the boom through the distribution beam, thus completely avoiding tension on the hydraulic jack cylinder. This fundamentally eliminates the major safety hazard of equipment overturning or damage that may be caused by the cylinder's inability to withstand tension, ensuring the safety and reliability of the device.

[0021] (3) The fixed block group and the distribution beam are rigidly connected by bolts to form a stable whole unit, which enhances the overall rigidity and stability of the support structure, effectively resists vibration and impact during construction, prevents the pad block from shifting or overturning, and ensures the absolute stability of the support foundation.

[0022] (4) The fixing blocks can be added or removed as needed, making them suitable for different height requirements and highly versatile. At the same time, the modular design also facilitates disassembly, transportation, and replacement and maintenance, reducing the cost of use and maintenance.

[0023] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for adjusting the height of the outrigger columns of a bridge deck crane, characterized in that; The device is installed between the bottom of the support column (5) and the bridge deck. The device mainly consists of a fixed block group (1), a distribution beam (2), a hydraulic system (3) and tie rods (4). The fixed block group (1) is made of multiple high-strength steel blocks of standard height stacked together. The lower end is rigidly connected to the upper end of the distribution beam (2) by bolts. The distribution beam (2) is a steel beam. Its core function is to evenly distribute the concentrated load transmitted from the fixed block group (1) above. The hydraulic system (3) mainly includes a hydraulic jack. The bottom of the cylinder of the jack sits on the bridge deck, and the top of its piston rod is connected to the bottom of the distribution beam (2). Two high-strength steel tie rods (4) are symmetrically arranged on both sides of the hydraulic jack. The upper end of the tie rod (4) passes through the reserved hole of the distribution beam (2) and is fixed to the distribution beam (2) by the upper nut. The lower end of the tie rod (4) is fixed to the foundation anchor on the bridge deck by the lower nut.

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