A method for adjusting a crane structure deviation

Abstract

The application provides a crane structure deviation adjustment method and relates to the port crane repair technical field. In view of the problem that the current port crane is inconvenient to repair when the centering deviation is too large, the lower end of the offset side support pipe is cut, the relative position of the cutting position support pipe and the insert plate is adjusted by using the adjusting assembly, the gantry tends to be in the normal position, and after the offset is repaired, the reset welding is carried out, the adjustment of the centering deviation of the gantry structure is realized, the use of large equipment is avoided, and the controllability and efficiency of the deviation repair are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of port crane repair technology, and specifically to a method for adjusting crane structural deviations. Background Technology

[0002] During the manufacturing and use of cranes, errors in the manufacturing process, stress release, or deformation after prolonged use may lead to misalignment of the overall steel structure. This can negatively impact the crane's performance and lifespan. Severe misalignment not only reduces the overall stability of the equipment structure but can also significantly affect the crane's loading and unloading efficiency.

[0003] For non-adjustable cranes, maintenance and adjustment are extremely difficult and require significant material and reinforcement costs. Large equipment is often needed for lifting and assistance during maintenance. However, in port container yard environments, the availability of large equipment is very difficult due to limitations in equipment, space, or other factors. This leads to delays or even preventable maintenance work, further increasing the difficulty and cost of repairs and making it difficult to meet the need for timely repairs of deformations that occur during the use of older equipment. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a method for adjusting the structural deviation of a crane. This method involves cutting the lower end of the support tube on the offset side and using an adjustment component to adjust the relative position of the support tube and the insert plate at the cut position, so that the gantry tends to the normal position. After the deviation is corrected, it is reset and welded, thereby achieving the adjustment of the gantry structure's centering deviation, avoiding the use of large equipment, and effectively improving the controllability and efficiency of deviation correction.

[0005] The purpose of this invention is to provide a method for adjusting the structural deviation of a crane, which adopts the following scheme:

[0006] include:

[0007] Select the support tube that is inclined on the offset side of the gantry, and install the adjustment component at the bottom end of the support tube where it is inserted into the plate.

[0008] Multiple adjustment components are arranged around the support tube to control the sliding of the support tube relative to the insert plate along its axial direction;

[0009] Cut the weld between the support tube and the insert plate, so that the support tube moves under the action of the adjustment component and the gravity of the gantry, and the gantry shifts in the opposite direction until the crane beam is aligned and adjusted to the set deviation range.

[0010] Keep the support tube and insert plate in position, re-weld the support tube and insert plate to secure them, and remove the adjustment assembly.

[0011] Furthermore, the adjustment assembly includes a support tube guide tube, an insert plate guide tube, and guide bolts that pass through the two in sequence. The support tube guide tube is installed on the support tube, and the insert plate guide tube is installed on the insert plate. Adjusting nuts are respectively fitted on both ends of the support tube guide tube and both ends of the insert plate guide tube. In the sliding direction of the support tube, the support tube guide tube and the insert plate guide tube can move relative to the guide bolts respectively.

[0012] Furthermore, the support tube guide tube is fixed to the support tube by a guide seat, and a lifting arm is provided on one side of the guide seat. The lifting arm abuts against the output end of the lifting element, and the lifting element is fixed to the insert plate.

[0013] Furthermore, the adjusting nut abuts against the end of the support tube guide tube or the insert plate guide tube to control and adjust the axial distance between the insert plate guide tube and the support tube guide tube.

[0014] Furthermore, the lifting element is fixed to the insert plate by a lifting support and is connected to an anti-fall plate; in the sliding direction of the support tube, the lifting element drives the support tube guide tube and the support tube to move relative to the insert plate guide tube and the insert plate.

[0015] Furthermore, one end of the support tube and the insert plate is provided with a slot, and adjustment components are provided on both sides of the slot, and stress relief holes are provided at the bottom of the slot.

[0016] Furthermore, the insert plate is provided with a guide plate that contacts the support tube wall to constrain the relative position of the insert plate and the support tube along the radial direction of the support tube.

[0017] Furthermore, before cutting the weld between the support tube and the insert plate, the end cap plate of the support tube is removed, and after re-welding the support tube and the insert plate, the end cap plate is re-welded to the support tube.

[0018] Furthermore, when cutting the weld, the changing trend of the gap at the cutting position is considered, and a bridge is left in the weld. Cutting can continue after the weld has stabilized.

[0019] Furthermore, after re-welding the support tube and insert plate, the stress relief holes at the insertion mating position were repaired, and an airtightness test was conducted and the paint was repaired.

[0020] Compared with the prior art, the advantages and positive effects of this invention are:

[0021] (1) In view of the problem that it is inconvenient to repair when the centering error of the port crane is out of tolerance, the lower end of the support tube on the offset side is cut, and the relative position of the support tube and the insert plate at the cut position is adjusted by the adjustment component, so that the gantry tends to the normal position. After the offset is repaired, the resetting welding is carried out to realize the adjustment of the centering error of the gantry structure, avoid the use of large equipment, and effectively improve the controllability and efficiency of the deviation repair.

[0022] (2) The adjustment component can effectively control the sliding of the support tube relative to the insert plate along its axial direction. With the cooperation of the support tube guide tube and the insert plate guide tube, the adjusting nut can control the distance between the two guide tubes, thereby achieving precise adjustment of the support tube position. In the centering adjustment of the crane beam, the stability and controllable safety of the crane are ensured.

[0023] (3) The lifting element is an important component of the whole structure. It is fixed to the insert plate by the lifting support and is connected to the anti-fall plate, which can effectively prevent safety problems such as falling during the adjustment process. At the same time, the lifting element can also drive the support tube guide tube and the support tube to move relative to the insert plate guide tube and the insert plate, thereby realizing the centering adjustment of the crane beam, making the whole adjustment process more efficient and safe.

[0024] (4) The design of the guide plate ensures that the relative position between the insert plate and the support tube is precisely controlled. By contacting the wall of the support tube, the guide plate can be prevented from shifting in the radial direction, thereby ensuring the stability of the entire structure and improving the centering adjustment accuracy of the crane beam. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0026] Figure 1 This is a schematic diagram of the gantry and support tube in Embodiment 1 of the present invention.

[0027] Figure 2 This is a schematic diagram of the gantry misalignment in Embodiment 1 of the present invention.

[0028] Figure 3 for Figure 1 A magnified view of a portion of point I in the middle.

[0029] Figure 4 for Figure 3 Schematic diagram of cross-section at point AA.

[0030] Figure 5 This is a schematic diagram of the adjustment component in Embodiment 1 of the present invention.

[0031] Figure 6 This is a schematic diagram of the adjustment component connecting the gantry and the support tube in Embodiment 1 of the present invention.

[0032] In the diagram, 1. guide bolt, 2. adjusting nut, 3. washer, 4. support tube guide tube, 5. guide seat, 6. lifting support, 7. lifting element, 8. anti-fall plate, 9. lifting arm, 10. guide plate, 11. support tube, 12. insert plate, 13. sealing plate, 14. gantry, 15. insert plate guide tube. Detailed Implementation

[0033] Example 1

[0034] In a typical embodiment of the present invention, such as Figures 1-6 As shown, a method for adjusting the structural deviation of a crane is presented.

[0035] The method for adjusting the structural deviation of the crane is explained in detail with reference to the attached drawings.

[0036] See Figure 1 Methods for adjusting crane structural deviations include:

[0037] Select the support tube 11 that is inclined on the offset side of the gantry 14, and install the adjustment component at the bottom end of the support tube 11 and the insertion position of the insert plate 12.

[0038] Multiple adjustment components are arranged around the support tube 11 to control the sliding of the support tube 11 relative to the insert plate 12 along its axial direction;

[0039] Cut the weld between the support tube 11 and the insert plate 12, so that the support tube 11 moves under the gravity of the adjustment component and the gantry 14, and the gantry 14 shifts in the opposite direction until the crane beam is aligned and adjusted to the set deviation range.

[0040] Keep the support tube 11 and the insert plate 12 in position, re-weld the support tube 11 and the insert plate 12 to secure them together, and remove the adjustment assembly.

[0041] The adjustment assembly in this embodiment includes a support tube guide tube 4, an insert plate guide tube 15, and a guide bolt 1. The support tube guide tube 4 is installed on the support tube 11, the insert plate guide tube 15 is installed on the insert plate 12, and the guide bolt 1 passes through the support tube guide tube 4 and the insert plate guide tube 15 in sequence, maintaining a gap with them, so as to provide a certain range of motion while meeting the guidance requirements.

[0042] Adjusting nuts 2 are fitted to both ends of the guide tube and both ends of the insert plate guide tube 15. In the sliding direction of the support tube 11, the support tube guide tube 4 and the insert plate guide tube 15 can move relative to the guide bolt 1. Multiple sets of adjusting components are arranged around the support tube 11, effectively controlling the sliding of the support tube 11 relative to the insert plate 12 along its axial direction. With the cooperation of the support tube guide tube 4 and the insert plate guide tube 15, the adjusting nuts 2 can control the distance between the two guide tubes, thereby achieving precise adjustment of the position of the support tube 11.

[0043] It should be noted that after the weld is removed, the force between the strut and the insert plate 12 is transmitted through the guide bolt 1 and the adjusting nut 2. The adjusting nut 2 is subjected to a large pressure, making it difficult to rotate. Therefore, in this embodiment, a lifting element 7 is provided as a device that works in conjunction with the adjusting assembly.

[0044] The support tube guide tube 4 is fixed to the support tube 11 by the guide seat 5. A lifting arm 9 is provided on one side of the guide seat 5. The lifting arm 9 abuts against the output end of the lifting element 7. The lifting element 7 is fixed to the insert plate 12. The adjusting nut 2 abuts against the end of the support tube guide tube 4 or the insert plate guide tube 15 to control and adjust the axial distance between the insert plate guide tube 15 and the support tube guide tube 4.

[0045] The design of the lifting arm 9 and the lifting element 7 makes the entire structure more flexible, allowing for position adjustments as needed. This not only improves the alignment accuracy of the crane beam but also makes maintenance and repair work more convenient and efficient. The adjusting nut 2 acts as an abutment at the ends of the support tube guide tube 4 and the insert plate guide tube 15. By rotating the adjusting nut 2, the distance between the two guide tubes can be finely adjusted, resulting in more precise alignment.

[0046] In this embodiment, a shim 3 is provided between the nut installation position and the ends of the support tube guide tube 4 and the insert plate guide tube 15 to reduce stress concentration and improve stability during the adjustment process.

[0047] like Figure 5 and Figure 6 As shown, the lifting element 7 is fixed to the insert plate 12 by the lifting support 6 and is connected to the anti-fall plate 8; in the sliding direction of the support tube 11, the lifting element 7 drives the support tube guide tube 4 and the support tube 11 to move relative to the insert plate guide tube 15 and the insert plate 12.

[0048] The lifting element 7 is an important component of the entire structure. It is fixed to the insert plate 12 by the lifting support 6 and is connected to the anti-fall plate 8, which can effectively prevent safety problems such as falling during the adjustment process. At the same time, the lifting element 7 can also drive the support tube guide tube 4 and the support tube 11 to move relative to the insert plate guide tube 15 and the insert plate 12, thereby realizing the centering adjustment of the crane beam, making the entire adjustment process more efficient and safer.

[0049] The support tube 11 is equipped with a slot at one end of the insertion plate 12. Adjustment components are provided on both sides of the slot, and stress relief holes are provided at the bottom of the slot. The stress relief holes can effectively release stress and prevent problems such as breakage during use. The stress relief holes also serve as the movement space when the insertion plate 12 and the support tube 11 slide relative to each other, allowing the insertion plate 12 to partially penetrate into the stress relief holes after moving along the slide.

[0050] like Figure 4As shown, the insert plate 12 is provided with a guide plate 10 that contacts the wall of the support tube 11 to constrain the relative position of the insert plate 12 and the support tube 11 along the radial direction of the support tube 11. The design of the guide plate 10 ensures that the relative position between the insert plate 12 and the support tube 11 is precisely controlled. By using the guide plate 10 that contacts the wall of the support tube 11, the insert plate 12 can be prevented from shifting in the radial direction, thereby ensuring the stability of the entire structure and improving the alignment accuracy of the crane beam.

[0051] Combination Figures 1-6 The actual working process is explained.

[0052] After selecting the support tube 11 that is tilted on the offset side of the gantry 14, an adjustment assembly is installed at the insertion position between the bottom end of the support tube 11 and the insert plate 12. The function of these adjustment assemblies is to control the sliding of the support tube 11 relative to the insert plate 12 along its axial direction. To achieve this goal, multiple adjustment assemblies need to be arranged around the support tube 11 to ensure stable control of the support tube 11.

[0053] Next, the weld between the support tube 11 and the insert plate 12 is cut. This step is to allow the support tube 11 to move under the weight of the adjusting assembly and the gantry 14, thereby offsetting the gantry 14 in the opposite direction. During the cutting process, care should be taken to protect the surrounding structures and components to ensure operational safety.

[0054] Once the weld between the support tube 11 and the insert plate 12 is cut, the gantry 14 will begin to offset in the opposite direction. This process needs to continue until the alignment of the crane beam is adjusted to within the set deviation range. This step is critical because it directly affects the stability and performance of the crane.

[0055] After the alignment is adjusted to the set range, maintain the positions of the support tube 11 and the insert plate 12, and re-weld the support tube 11 and the insert plate 12 to secure them together. This ensures that the connection between the support tube 11 and the insert plate 12 is firm and reliable, preventing loosening or detachment during subsequent use.

[0056] Finally, remove the adjustment components. Throughout the process, pay attention to safe operation and meticulous control, and use appropriate tools and equipment.

[0057] After opening the weld of the end sealing plate 13 of the support tube 11, weld 4 sets of stud devices and 4 guide positioning plates, and then open the weld between the support tube 11 and the insert plate 12.

[0058] The support tube 11 of the gantry 14 is tightened using the adjustment component. The lifting element 7 uses a 60t hydraulic jack. By loosening the adjusting nut 2 on the auxiliary guide bolt 1 of the 60t hydraulic jack, the centering of the beam is measured and adjusted to within a deviation of 20mm. Then, the weld between the support tube 11 and the insert plate 12 is welded and non-destructive testing is performed.

[0059] According to the blueprint, stress relief holes are treated and end sealing plates 13 are welded. Support tube 11 undergoes airtightness testing and is repaired with paint.

[0060] Explanation based on actual on-site equipment:

[0061] A gantry crane with 14 non-adjustable struts, such as... Figure 2 As shown, the main beam is out of alignment, with the front beam head offset 150mm to the left of the sea. This misalignment is caused by manufacturing and assembly errors in newly made steel structures, stress release deformation, or deformation and repair / modification of older equipment.

[0062] In this embodiment, by using an adjustment component, with the auxiliary hydraulic jack as the lifting element 7, the length of the diagonal brace of the right-side gantry 14 is adjusted to adjust the alignment of the main beam, i.e., adjusting as follows: Figure 1 and Figure 2 The support tube 11 shown.

[0063] The following points should be noted during construction:

[0064] 1. During construction, temporary working platforms should be erected on scaffolding to ensure operational safety, and on-site welding protection should be carried out.

[0065] 2. Due to the dust and welding pollution that may occur when cutting and reconnecting the support pipe 11 and the insert plate 12, construction personnel must ventilate before welding inside the support pipe 11, and comply with the requirements of oxygen and explosion testing before entering and evacuating the pipeline after construction to prevent suffocation or explosion.

[0066] 3. Before cutting the weld seam of the support pipe 11 and the insert plate 12, the construction personnel need to complete the welding of the adjustment components. When cutting the support pipe 11, pay close attention to the changing trend of the cutting gap, and leave 4 100mm bridges evenly. Continue cutting after observing the stability.

[0067] 4. In this embodiment, the beam alignment is adjusted to a set deviation range of 20mm; after adjustment, re-welding is performed. Note that the repair of the stress relief hole cuttings needs to be polished smooth.

[0068] 5. After the sealing plate 13 is welded, conduct an airtightness test on the strut and perform touch-up painting.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for adjusting the structural deviation of a crane, characterized in that, include: Select the support tube that is inclined on the offset side of the gantry, and install the adjustment component at the bottom end of the support tube where it is inserted into the plate. Multiple adjustment components are arranged around the support tube to control the sliding of the support tube relative to the insert plate along its axial direction; Cut the weld between the support tube and the insert plate, so that the support tube moves under the action of the adjustment component and the gravity of the gantry, and the gantry shifts in the opposite direction until the crane beam is aligned and adjusted to the set deviation range. Maintain the position of the support tube and insert plate, re-weld the support tube and insert plate to secure them, and remove the adjustment assembly; The adjustment assembly includes a support tube guide tube, an insert plate guide tube, and guide bolts that pass through the two in sequence. The support tube guide tube is installed on the support tube, and the insert plate guide tube is installed on the insert plate. Adjusting nuts are respectively fitted on both ends of the support tube guide tube and both ends of the insert plate guide tube. In the sliding direction of the support tube, the support tube guide tube and the insert plate guide tube can move relative to the guide bolts respectively. The support tube guide tube is fixed to the support tube by the guide seat. A lifting arm is provided on one side of the guide seat. The lifting arm abuts against the output end of the lifting element. The lifting element is fixed to the insert plate. The adjusting nut abuts against the end of the support tube guide tube or the insert plate guide tube to control and adjust the axial distance between the insert plate guide tube and the support tube guide tube; The lifting element is fixed to the insert plate by a lifting support and is connected to an anti-fall plate; in the sliding direction of the support tube, the lifting element drives the support tube guide tube and the support tube to move relative to the insert plate guide tube and the insert plate.

2. The crane structural deviation adjustment method as described in claim 1, characterized in that, The support tube and the insert plate have a slot at one end, adjustment components on both sides of the slot, and stress relief holes at the bottom of the slot.

3. The method for adjusting crane structural deviation as described in claim 1 or 2, characterized in that, The insert plate is provided with a guide plate that contacts the support tube wall to constrain the relative position of the insert plate and the support tube along the radial direction of the support tube.

4. The method for adjusting crane structural deviation as described in claim 1, characterized in that, Before cutting the weld between the support tube and the insert plate, cut off the end cap of the support tube, and after re-welding the support tube and the insert plate, re-weld the end cap to the support tube.

5. The crane structural deviation adjustment method as described in claim 1 or 4, characterized in that, When cutting welds, consider the changing trend of the gap at the cutting position, leave a bridge in the weld, and continue cutting after it stabilizes.

6. The crane structural deviation adjustment method as described in claim 5, characterized in that, After re-welding the support tube and insert plate, repair the stress relief holes at the insertion mating position, conduct an airtightness test, and repair the paint.

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