Hydraulic adjusting device and method for supporting legs of large gantry crane

Abstract

The invention relates to a hydraulic adjusting device and method for supporting legs of a large gantry crane. The hydraulic adjusting device comprises a hydraulic adjusting system, detection equipment, a locking device and an arc-shaped gasket. The hydraulic adjusting system is telescopically arranged between a large gantry crane supporting leg and a supporting base plane and is used for driving the height adjustment of the supporting leg; the detection equipment is matched with the supporting leg and is used for collecting height data and perpendicularity data of the supporting leg in real time; the locking device is linked with the hydraulic adjusting system and is used for fixing the position of the adjusted supporting leg; the arc-shaped gaskets are arranged between the bottoms of the supporting legs and the supporting base plane and used for being matched with the site gradient. Aiming at the problems of difficult leveling and insufficient precision of the supporting legs of the large gantry crane under complex working conditions, the invention realizes accurate adjustment of the height and perpendicularity of the supporting legs, is suitable for supporting leg adjustment scenes during gantry crane installation, maintenance and working condition conversion, and has the characteristics of simplicity and convenience in operation, accurate adjustment, safety, reliability and high adaptability.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a hydraulic adjustment device and method for the outriggers of large gantry cranes. It is applicable to the installation, relocation, maintenance, and operational condition switching processes of large gantry cranes in bridges, storage yards, and heavy industrial sites, enabling precise adjustment of the outrigger height and verticality. Background Technology

[0002] As key equipment in bridges, storage yards, and heavy industrial sites, large gantry cranes rely on their outriggers as the core components that bear the overall weight and ensure stable operation. During the installation, relocation, maintenance, or change of operating conditions of the gantry crane, the height and verticality of the outriggers need to be precisely adjusted due to the slope of the site to ensure the overall balance of the gantry crane and operational safety.

[0003] Currently, to ensure that the outriggers of large gantry cranes are level, the site needs to be leveled. Alternatively, when adjusting the outriggers, manual adjustment using mechanical jacks or crude adjustment using traditional hydraulic systems is often employed, which presents the following problems: 1. Site leveling: Due to the long travel route, a large amount of materials are used, resulting in unnecessary waste.

[0004] 2. Mechanical jacks rely on manual operation for adjustment, which is inefficient and has poor precision, making it difficult to meet millimeter-level leveling requirements; 3. Traditional hydraulic systems lack real-time monitoring capabilities, and deviations in the verticality of the outriggers cannot be fed back in a timely manner during the adjustment process, which can easily lead to the risk of equipment tilting. Among existing related patented technologies, such as the chassis leveling system with patent publication number CN101995885A, which uses a PLC and tilt sensors to control the leveling of the four outriggers, it only focuses on the horizontality of the chassis and does not specifically monitor the verticality of the outriggers of large gantry cranes. Furthermore, its locking structure is simplistic and cannot handle the heavy-load conditions of gantry cranes. The automatic leveling system with patent publication number CN217294491U, suitable for large oil and gas equipment, although equipped with dual-axis tilt sensors, does not consider the slope adaptation requirements of the gantry crane's operating site, lacks a dedicated slope matching structure, and fails to achieve synchronous and precise control of height and verticality, thus failing to meet the stringent operational requirements of large gantry cranes.

[0005] Therefore, in view of the problems existing in the existing technology, there is an urgent need to design a large gantry crane outrigger hydraulic adjustment device that is accurate, efficient and adaptable to complex working conditions, so as to solve the problems of low adjustment accuracy, complicated operation and high safety risks in the existing technology. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention aims to provide a hydraulic adjustment device and method for the outriggers of large gantry cranes. By combining hydraulic drive with real-time monitoring, it achieves precise adjustment of the height and verticality of the outriggers of large gantry cranes, making it suitable for narrow spaces and complex working conditions. At the same time, it ensures reliable locking after adjustment, thereby improving the safety and efficiency of gantry crane operations.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A hydraulic adjustment device for the outriggers of a large gantry crane includes a hydraulic adjustment system, a detection device, a locking device, and an arc-shaped shim. The hydraulic adjustment system is telescopically mounted between the outrigger and the supporting base surface to drive the outrigger height adjustment. The detection device is adapted to the outrigger and is used to collect outrigger height and verticality data in real time. The locking device is linked to the hydraulic adjustment system to fix the adjusted outrigger position. The arc-shaped shim is disposed between the bottom of the outrigger and the supporting base surface to match the slope of the site.

[0008] Furthermore, the hydraulic adjustment system includes a hydraulic cylinder, a hydraulic pump, a control valve group, and pipelines; the hydraulic cylinder is fixedly connected to the outriggers of the large gantry crane via a flange, the hydraulic pump forms a closed loop with the hydraulic cylinder and the control valve group via pipelines, and the control valve group is used to regulate the hydraulic oil flow and pressure.

[0009] Furthermore, the bottom of the hydraulic cylinder is provided with an anti-slip pad, which is made of rubber and is fitted to the upper surface of the arc-shaped pad.

[0010] Furthermore, the pipeline is a high-pressure hose, and the high-pressure hose is fitted with a protective sleeve, which is made of wear-resistant plastic.

[0011] Furthermore, the curvature of the arc-shaped pad can be adaptively adjusted according to the slope of the site, and it is made of high-strength alloy steel with anti-slip texture on the surface.

[0012] Furthermore, the detection equipment includes a displacement sensor and a verticality detector; the displacement sensor is installed on the side of the gantry crane beam, and its measurement accuracy is not less than 0.1 mm; the verticality detector is installed on the top of the gantry crane beam, and its measurement range is ±5°.

[0013] Furthermore, the locking device is a dual-locking structure, including a mechanical lock and a hydraulic lock; the mechanical lock includes a screw and a nut, the nut being in close contact with an arc-shaped washer; the hydraulic lock is connected in series with a hydraulic cylinder and is used to lock the cylinder's extension and retraction state.

[0014] Furthermore, after the locking device completes the locking action, the hydraulic cylinder automatically unloads and stops bearing the load pressure of the gantry crane.

[0015] Furthermore, the detection equipment is electrically connected to the control valve group, and the control valve group can make fine adjustments to the extension and retraction of the hydraulic cylinder based on the real-time data feedback from the detection equipment.

[0016] A method for hydraulic adjustment of outriggers for large gantry cranes, based on the aforementioned hydraulic adjustment device for outriggers of large gantry cranes, includes the following steps: S1: Install the aforementioned hydraulic adjustment device at the bottom of the outrigger of the large gantry crane, fixing the hydraulic cylinder to the outrigger via a flange. A displacement sensor and a verticality detector are respectively installed on the side and top of the crossbeam of the large gantry crane; S2: Collect initial height and verticality data of the outrigger using the displacement sensor and verticality detector as adjustment benchmarks; S3: Start the hydraulic pump and drive the hydraulic cylinder to extend and retract via the control valve group to initially adjust the outrigger height; S4: Based on real-time data feedback from the detection equipment, fine-tune the hydraulic cylinder via the control valve group until the outrigger height and verticality meet the design requirements; S5: Tighten the nut of the mechanical lock to ensure it is in close contact with the arc-shaped washer, activating the hydraulic lock to lock the cylinder state, completing double locking; S6: The hydraulic cylinder automatically unloads, and the arc-shaped washer adaptively matches the site slope, completing the outrigger adjustment.

[0017] Compared with the prior art, the technical solution of the present invention has the following significant advantages: 1. Significantly improved adjustment accuracy: By using a displacement sensor with an accuracy of no less than 0.1mm and a verticality detector with a measurement range of ±5°, real-time monitoring of both height and verticality is achieved. Combined with the fine-tuning function of the control valve group, it meets the millimeter-level leveling requirements and solves the problem of insufficient accuracy in existing technologies.

[0018] 2. Significantly improved operating efficiency: Hydraulic drive replaces manual operation, with a single adjustment taking only about 15 minutes, which is more than 60% more efficient than traditional mechanical adjustment, and no site leveling is required, reducing material waste.

[0019] 3. Enhanced locking reliability: The dual locking structure (mechanical lock + hydraulic lock) and cylinder unloading design not only avoid the risk of outrigger displacement, but also prevent the cylinder from fatigued by long-term pressure, solving the problems of the existing locking structure being too simple and lacking in reliability.

[0020] 4. Adaptable to complex working conditions: The arc-shaped pad can adaptively match the slope of the site. The anti-slip pad and wear-resistant pipeline design improve the adaptability of the device, making it suitable for narrow spaces and complex working environments with slopes, thus making up for the poor adaptability of existing technologies.

[0021] 5. Reduced safety risks: Real-time monitoring and data feedback functions can promptly detect and adjust vertical deviations to prevent equipment tilting; dual locking and anti-slip design further enhance operational safety and solve the problem of high safety risks associated with traditional adjustment methods.

[0022] In summary, this invention addresses the problems of difficulty and insufficient precision in leveling the outriggers of large gantry cranes under complex working conditions, enabling precise adjustment of the outrigger height and verticality. It is applicable to outrigger adjustment scenarios during gantry crane installation, maintenance, and working condition changes, and features simple operation, precise adjustment, safety, reliability, and strong adaptability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of an arc-shaped gasket; Figure 3 This is a schematic diagram of the support frame. Figure 4 This is a schematic diagram of the support frame elevation; In the diagram: 1. Crossbeam; 2. Screw; 3. Nut; 4. Arc-shaped washer; 5. Support frame; 6. Jack; 7. Displacement sensor; 8. Verticality monitor; 9. Gantry crane outrigger. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Example 1: Refer to Figure 1 to... Figure 4 The device shown is a hydraulic adjustment device for the outriggers of a large gantry crane, comprising a hydraulic adjustment system, a testing device, and a locking device.

[0026] A retractable hydraulic adjustment system is installed between the large gantry crane outrigger 9 and the supporting base to drive the height adjustment of the gantry crane outrigger 9; a detection device is adapted to the outrigger to collect real-time data on the outrigger height and verticality; a locking device is linked to the hydraulic adjustment system to fix the adjusted outrigger position. An arc-shaped shim 4 is installed between the bottom of the gantry crane outrigger 9 and the supporting base to match the slope of the site.

[0027] The hydraulic adjustment system includes hydraulic cylinders, hydraulic pumps, control valve groups, and pipelines. The hydraulic cylinders are fixedly connected to the outriggers of the large gantry crane via flanges. The hydraulic pump forms a closed loop with the hydraulic cylinders and control valve groups via pipelines. The control valve groups are used to regulate the flow and pressure of the hydraulic oil.

[0028] The testing equipment includes a displacement sensor 7 and a verticality measuring instrument 8; the displacement sensor 7 is installed on the side of the gantry crane beam 1, and its measurement accuracy is not less than 0.1mm; the verticality measuring instrument 8 is installed on the top of the gantry crane beam 1, and its measurement range is ±5°.

[0029] The locking device is a double locking structure, including a mechanical lock and a hydraulic lock; the mechanical lock includes a screw 2 and a nut 3, with the nut 3 and the arc-shaped washer 4 in close contact; the hydraulic lock is connected in series with the hydraulic cylinder and is used to lock the extension and retraction state of the cylinder.

[0030] The curvature of the arc-shaped pad 4 can be adaptively adjusted according to the slope of the site. It is made of high-strength alloy steel and has anti-slip texture on the surface.

[0031] The bottom of the hydraulic cylinder is equipped with an anti-slip pad, which is made of rubber and fits against the upper surface of the arc-shaped pad.

[0032] The pipeline uses high-pressure hoses, which are fitted with protective sleeves made of wear-resistant plastic.

[0033] The testing equipment is electrically connected to the control valve group, which can finely adjust the extension and retraction of the hydraulic cylinder based on the real-time data feedback from the testing equipment.

[0034] After the locking device completes the locking action, the hydraulic cylinder automatically unloads and stops bearing the load pressure of the gantry crane.

[0035] Implementation 2: A method for hydraulic adjustment of outriggers of large gantry cranes, based on the hydraulic adjustment device for outriggers of large gantry cranes in Embodiment 1, includes the following steps: Step 1: Install a hydraulic adjustment system at the bottom of the outriggers of the large gantry crane. The hydraulic adjustment system includes screw 2, support frame 5, and jack (hydraulic cylinder) 6. The cylinder model is selected according to the rated pressure and stroke based on the load-bearing capacity of the outriggers. Step 2: Install detection equipment on the side and top of the crossbeam 1 to detect the current height and verticality of the outriggers and obtain initial data; the detection equipment includes displacement sensor 7 and verticality detector 8; Step 3: According to the design requirements and test data, activate jack (hydraulic cylinder) 6 to extend the outriggers and adjust their height; Step 4: When the displacement sensor 7 reports the height, read the reading from the verticality detector 8 and make fine adjustments; continue monitoring the data until the height and verticality meet the requirements. Step 5: After the outrigger is adjusted to the designed position, tighten the nut 3 until it is in close contact with the arc-shaped washer 4. The arc-shaped washer 4 will rotate accordingly to complete the locking, and the jack (hydraulic cylinder) 6 will retract.

[0036] Preferably, in step 1, in the hydraulic adjustment system, the jack (hydraulic cylinder) 6 is connected to the outrigger via a flange, an anti-slip pad is installed at the bottom of the cylinder, and the pipeline uses a high-pressure hose with a protective sleeve to avoid wear during operation.

[0037] Preferably, in step 2, the displacement sensor of the detection equipment has an accuracy of not less than 0.1 mm, and the verticality detector has a measurement range of ±5°.

[0038] Preferably, in step 5, the locking device (including a mechanical lock and a hydraulic lock, the mechanical lock including a nut 3 and an arc-shaped washer 4) is linked with the hydraulic system. After locking is completed, the hydraulic cylinder is unloaded to avoid cylinder fatigue caused by long-term pressure. At the same time, a dual locking structure (mechanical lock + hydraulic lock) is set to improve reliability.

[0039] In this embodiment, the entire adjustment process takes 15 minutes, which is significantly more efficient than traditional mechanical adjustment (40 minutes), and the adjustment accuracy fully meets the requirements of gantry crane operations. During subsequent maintenance, the outriggers can be readjusted using the same device without disassembly and reinstallation, reducing maintenance costs.

[0040] This invention is not limited to the above embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic adjustment device for the outriggers of a large gantry crane, characterized in that, It includes a hydraulic adjustment system, a testing device, a locking device, and an arc-shaped shim; the hydraulic adjustment system is telescopically installed between the outriggers of the large gantry crane and the supporting base, used to drive the outrigger height adjustment; the testing device is adapted to the outriggers and used to collect outrigger height and verticality data in real time; the locking device is linked to the hydraulic adjustment system and used to fix the adjusted outrigger position; the arc-shaped shim is set between the bottom of the outrigger and the supporting base to match the site slope.

2. The hydraulic adjustment device for the outriggers of a large gantry crane according to claim 1, characterized in that, The hydraulic adjustment system includes a hydraulic cylinder, a hydraulic pump, a control valve group, and pipelines; the hydraulic cylinder is fixedly connected to the outriggers of the large gantry crane via a flange, and the hydraulic pump forms a closed loop with the hydraulic cylinder and the control valve group via pipelines; the control valve group is used to regulate the flow and pressure of the hydraulic oil.

3. The hydraulic adjustment device for the outriggers of a large gantry crane according to claim 2, characterized in that, The bottom of the hydraulic cylinder is equipped with an anti-slip pad, which is made of rubber and is fitted to the upper surface of the arc-shaped pad.

4. The hydraulic adjustment device for the outriggers of a large gantry crane according to claim 2, characterized in that, The pipeline uses a high-pressure hose, and the high-pressure hose is fitted with a protective sleeve, which is made of wear-resistant plastic.

5. The hydraulic adjustment device for the outriggers of a large gantry crane according to claim 1, characterized in that, The curvature of the arc-shaped pad can be adaptively adjusted according to the slope of the site. It is made of high-strength alloy steel and has anti-slip texture on the surface.

6. The hydraulic adjustment device for the outriggers of a large gantry crane according to claim 1, characterized in that, The detection equipment includes a displacement sensor and a verticality detector; the displacement sensor is installed on the side of the gantry crane beam and its measurement accuracy is not less than 0.1 mm; the verticality detector is installed on the top of the gantry crane beam and its measurement range is ±5°.

7. The hydraulic adjustment device for the outriggers of a large gantry crane according to claim 1, characterized in that, The locking device is a dual-locking structure, including a mechanical lock and a hydraulic lock; the mechanical lock includes a screw and a nut, the nut being in close contact with an arc-shaped washer; the hydraulic lock is connected in series with a hydraulic cylinder and is used to lock the cylinder's extension and retraction state.

8. The hydraulic adjustment device for the outriggers of a large gantry crane according to claim 7, characterized in that, After the locking device completes the locking action, the hydraulic cylinder automatically unloads and stops bearing the load pressure of the gantry crane.

9. The hydraulic adjustment device for the outriggers of a large gantry crane according to claim 1, characterized in that, The detection equipment is electrically connected to the control valve group, which can make fine adjustments to the extension and retraction of the hydraulic cylinder based on the real-time data feedback from the detection equipment.

10. A method for hydraulic adjustment of outriggers of a large gantry crane, based on the hydraulic adjustment device for outriggers of a large gantry crane according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Install the aforementioned hydraulic adjustment device at the bottom of the large gantry crane's outriggers, fixing the hydraulic cylinders to the outriggers via flanges. Displacement sensors and verticality detectors are installed on the side and top of the large gantry crane's crossbeam, respectively. S2: Collect initial outrigger height and verticality data using the displacement sensors and verticality detectors as adjustment benchmarks. S3: Start the hydraulic pump, driving the hydraulic cylinders to extend and retract via the control valve group to initially adjust the outrigger height. S4: Based on real-time data feedback from the detection equipment, fine-tune the hydraulic cylinders via the control valve group until the outrigger height and verticality meet design requirements. S5: Tighten the nut of the mechanical lock to ensure it is tightly fitted with the arc-shaped washer, activating the hydraulic lock to lock the cylinder state, completing the double locking. S6: The hydraulic cylinder automatically unloads the load, and the arc-shaped shim adapts to the slope of the site to complete the adjustment of the outriggers.

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