An auxiliary tool for a 48-bit code vehicle and a method for using the same

Abstract

The application provides an auxiliary tool for a 48 suction code travelling crane for ships and a use method thereof. The auxiliary tool comprises a C-shaped clamping groove, a cover plate, a lifting ring and a connecting assembly. The C-shaped clamping groove comprises a first transverse section, a connecting section and a second transverse section connected in sequence. The C-shaped clamping groove and the cover plate form an accommodation space for accommodating a travelling crane cross beam. The lifting ring is installed at the bottom of the second transverse section to connect a suction code chain. The first transverse section is provided with a hollow channel, and the second transverse section is provided with a first threaded hole. A limiting bolt is locked in the first threaded hole after passing through the hollow channel and a second threaded hole on the cross beam, so that the C-shaped clamping groove and the cross beam are rigidly connected. The cover plate is fixed with the C-shaped clamping groove through mounting bolts. The original single-bolt direct connection structure is optimized to a C-shaped clamping groove multi-point connection, effectively dispersing the concentrated stress of hoisting, avoiding the deformation and jamming of the bolt under load, and achieving load sharing through the uniform distribution of multiple auxiliary tools along the cross beam. The assembly and disassembly of the auxiliary tool are convenient, and the auxiliary tool can be reused.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, specifically relating to an auxiliary tooling suitable for a marine 48-speed gantry crane and its usage method. Background Technology

[0002] Throughout the entire shipbuilding process, key procedures such as the transfer, material handling, and precise alignment of core structural components like steel plates, various precision parts, and hull sections all rely on the 48-inch crane for coordination. As a core lifting auxiliary equipment in the ship structure prefabrication and assembly stages, the operational stability and connection reliability of the 48-inch crane directly determine the workshop's production efficiency and operational continuity, ensuring the smooth operation of shipbuilding.

[0003] Currently, the connection between the crossbeam and the bottom scanning chain of a 48-type scanning crane generally uses a single vertical bolt for fixing, such as... Figure 1 As shown. This connection method is simple in structure and easy to assemble, meeting the basic requirements of hoisting operations. However, considering long-term on-site operating conditions and equipment maintenance, the single vertical bolt connection structure has obvious defects: During operation, the 48-bar chuck needs to continuously withstand the heavy load pressure of the steel plate and hull components, the vibration load generated by hoisting and displacement, and the stress caused by fine-tuning. Long-term repeated load impacts will cause irreversible structural deformation such as elastic deformation and plastic bending to gradually occur in the single connecting bolt and its connection parts. After the bolt structure is deformed, it will directly cause the bar chuck chain to be stuck between the chain and the chuck crossbeam, misalignment of the assembly gap, and problems such as difficulty in disassembling the bar chuck chain, jamming during disassembly and assembly, or even inability to disassemble normally.

[0004] These types of malfunctions directly disrupt production cycles, significantly increasing the time spent on equipment disassembly and assembly, as well as maintenance workload. This, in turn, affects the progress of subsequent processes such as welding, assembly, and grinding, resulting in a decline in overall production efficiency. Furthermore, even with regular straightening, repositioning, and repair of deformed bolts, fatigue damage caused by long-term structural stress cannot be completely eliminated, leaving hidden stress damage within the bolts. During subsequent heavy-load operations, this damage accumulates, leading to a significant decrease in the bolts' fatigue resistance and load-bearing capacity, and a marked reduction in the lifespan of equipment components. This not only increases equipment replacement costs and downtime for maintenance but also indirectly enhances safety hazards during on-site operations. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: An auxiliary tooling for a marine 48-type gantry crane includes: a C-shaped slot comprising a first transverse section, a connecting section, and a second transverse section connected sequentially, the first and second transverse sections being parallel to each other, the connecting section being perpendicular to the first and second transverse sections, and both ends of the connecting section being connected to the first and second transverse sections respectively; a cover plate located on the first and second transverse sections away from the connecting section, the cover plate, the first transverse section, the connecting section, and the second transverse section together forming an accommodating space for accommodating the crane crossbeam; and a lifting ring installed on the second transverse section away from the first transverse section. One side of the section is used to connect the code-absorbing chain; the connecting assembly includes mounting bolts and limiting bolts, and the cover plate is connected to the first transverse section and the second transverse section through the mounting bolts; the first transverse section has a hollow channel along the thickness direction, and the inner wall of the hollow channel is machined with internal threads; the second transverse section has a first threaded hole at a position coaxial with the hollow channel; the limiting bolts pass through the hollow channel in sequence, extend into the accommodating space and pass through the second threaded hole on the crane crossbeam that matches the limiting bolts, and the end of the limiting bolt is locked in the first threaded hole so that the C-shaped slot and the crane crossbeam form a rigid connection.

[0006] In some embodiments, the ends of the first transverse segment and the second transverse segment away from the connecting segment are both connected to an extension segment; the extension segment is provided with a plurality of third threaded holes, and the two ends of the cover plate are respectively provided with fourth threaded holes corresponding to the positions of the third threaded holes; the mounting bolt passes through the third threaded holes and the fourth threaded holes and is locked.

[0007] In some embodiments, the extension segment is perpendicular to the first transverse segment and the second transverse segment, and is arranged parallel to the cover plate.

[0008] In some embodiments, both the first threaded hole and the fourth threaded hole are blind holes, wherein the opening depth of the first threaded hole is less than the thickness of the second transverse segment, and the opening depth of the fourth threaded hole is less than the thickness of the cover plate itself.

[0009] In some embodiments, the edges of the hollow channel opening on the first transverse segment and the outer edge of the lifting ring are provided with rounded structures.

[0010] In some embodiments, the first transverse segment, the connecting segment, the second transverse segment, and the extension segment are connected by integral molding or welding; or, the lifting ring and the second transverse segment are connected by integral molding or welding.

[0011] A method for using the auxiliary tooling described above for a marine 48-type chuck includes the following steps: First, the C-shaped slot is fitted onto the chuck beam from the side, so that the chuck beam is housed within the space formed by the first transverse section, the connecting section, and the second transverse section. Second, the position of the C-shaped slot is adjusted so that the hollow channel on the first transverse section, the first threaded hole on the second transverse section, and the second threaded hole on the chuck beam are coaxially aligned. Third, after the C-shaped slot is aligned, one of the following two assembly methods is used to complete the assembly of the cover plate, the C-shaped slot, and the chuck beam. Locking assembly between: Method 1: The limiting bolt passes through the second threaded hole of the hollow channel and the crane crossbeam in sequence, and the end is screwed into the first threaded hole of the second transverse section and tightened; then the cover plate is fixedly connected to the C-shaped slot by the mounting bolt; Method 2: First, the cover plate is fastened to the opening end of the C-shaped slot, and the cover plate is fixed to the C-shaped slot using the mounting bolt; then the limiting bolt passes through the second threaded hole of the hollow channel and the crane crossbeam in sequence, and the end is screwed into the first threaded hole of the second transverse section and tightened, completing the connection between the C-shaped slot and the crane crossbeam.

[0012] In some embodiments, the ends of the first transverse segment and the second transverse segment away from the connecting segment are both connected to an extension segment; the extension segment is provided with a plurality of third threaded holes, and the two ends of the cover plate are respectively provided with fourth threaded holes corresponding to the positions of the third threaded holes; the fixed connection steps of the cover plate and the C-shaped slot are as follows: align the fourth threaded holes at both ends of the cover plate with the third threaded holes on the extension segments of the first transverse segment and the second transverse segment respectively, and use the mounting bolts to sequentially pass through the corresponding third threaded holes and fourth threaded holes and tighten them.

[0013] In some embodiments, the steps of the method further include: determining the number of auxiliary fixtures to be used based on the specifications of the workpiece to be transferred and the size of the lifting load, and arranging multiple sets of auxiliary fixtures at intervals along the length direction of the crane beam.

[0014] In some embodiments, the steps of the method further include: after the marine 48 absorbing code crane operation is completed, first disassemble the absorbing code chain from the lifting ring; then loosen all the mounting bolts and the limiting bolts in sequence, separate the cover plate and the C-shaped slot, and remove the entire set of auxiliary tooling from the crane crossbeam.

[0015] Compared with the prior art, the auxiliary tooling and its usage method for marine 48-speed gantry cranes provided by the present invention have the following beneficial effects: 1. This invention uses C-shaped slots to wrap the crane crossbeam, and uses limiting bolts to bridge the first and second transverse sections and the crane crossbeam body to disperse and transfer the concentrated stress of hoisting, eliminate single-point stress concentration, and avoid bolt bending deformation under pressure, jamming and difficulty in disassembly. 2. The auxiliary tooling provided by the present invention also has an anti-interference design: the first threaded hole and the fourth threaded hole adopt a blind hole structure. After the bolt is tightened, the bolt end does not penetrate the second transverse section and the cover plate, so as to avoid the protruding bolt scratching or interfering with the assembly of the code-absorbing lock chain. 3. Multiple sets of auxiliary tooling can be evenly distributed along the length of the crane beam, with each set of tooling bearing the load independently, realizing the multi-point distribution of the lifting load and adapting to the lifting needs of workpieces of different specifications to be transferred. 4. This invention provides two assembly sequences adapted to auxiliary tooling: locking the C-shaped slot first and then installing the cover plate, or installing the cover plate first and then locking the C-shaped slot, to adapt to different work spaces and operating habits. 5. The assembly and disassembly procedures of the entire set of auxiliary tooling are simple, the bolt tightening points are neat and uniform, and no special auxiliary workpieces are required for disassembly and assembly, which greatly shortens the tooling change time and effectively improves the tooling pre-assembly efficiency and on-site construction flexibility before steel plate material handling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation of a conventional overhead crane crossbeam and a code-absorbing chain provided by the present invention; Figure 2 This is a schematic diagram of the installation of the crane crossbeam and auxiliary tooling provided by the present invention; Figure 3 Cross-sectional view of auxiliary tooling; Figure 4 for Figure 3 A schematic diagram at point AA; Figure 5 for Figure 3 Schematic diagram at point BB; Figure 6 for Figure 3 A schematic diagram at point CC; Figure 7 This is a schematic diagram of the cover plate. Figure 8 This is a schematic diagram of the limit bolt.

[0017] Explanation of reference numerals in the attached drawings: 1-C-type slot; 11-first transverse section; 111-hollow channel; 12-connecting section; 13-second transverse section; 131-first threaded hole; 132-lifting ring; 14-accommodating space; 15-extension section; 151-third threaded hole; 2-Cover plate; 21-Fourth threaded hole; 3-Connecting assembly; 31-Mounting bolt; 32-Limit bolt; 4-Tractor crossbeam; 5-Code-absorbing chain; 6-Electromagnetic chuck. Detailed Implementation

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0019] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0020] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Furthermore, in the description of this invention, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0023] Combination Figures 1 to 8As shown, the present invention provides an auxiliary tooling for a marine 48-type traction crane, used to replace the original single-bolt direct connection structure, optimize the connection form between the crane beam 4 and the traction chain 5, disperse the concentrated stress during hoisting, and avoid the connecting bolts from deforming and jamming under load. The auxiliary tooling includes: a C-shaped slot 1, a cover plate 2, and a connecting assembly 3. The C-shaped slot 1 includes a first transverse section 11, a connecting section 12, and a second transverse section 13 connected in sequence. The first transverse section 11 and the second transverse section 13 are arranged in parallel. The connecting section 12 is perpendicular to the first transverse section 11 and the second transverse section 13, and both ends of the connecting section 12 are connected to the first transverse section 11 and the second transverse section 13 respectively. The three together form a C-shape.

[0024] The cover plate 2 is located on the side of the first transverse section 11 and the second transverse section 13 away from the connecting section 12. The cover plate 2, the first transverse section 11, the connecting section 12, and the second transverse section 13 together enclose and form a receiving space 14 for accommodating the crane crossbeam 4. The shape and size of the receiving space 14 are adapted to the outer contour of the crane crossbeam 4.

[0025] A hanging ring 132 for connecting the code-absorbing chain 5 is installed on the side of the second transverse section 13 away from the first transverse section 11.

[0026] The aforementioned connecting component 3 includes mounting bolts 31 and limiting bolts 32. The cover plate 2 is connected to the first transverse section 11 and the second transverse section 13 through the aforementioned mounting bolts 31. That is, the first transverse section 11, the second transverse section 13 and the cover plate 2 are respectively provided with matching threaded holes at corresponding positions. In specific assembly, one set of mounting bolts 31 passes through the corresponding threaded holes on the first transverse section 11 and the cover plate 2 and locks them in place. Another set of mounting bolts 31 passes through the corresponding threaded holes on the second transverse section 13 and the cover plate 2 and locks them in place. This completes the sealing and limiting of the cover plate 2 on the opening side of the C-shaped slot 1, preventing the traveling beam 4 from moving out of the accommodating space 14.

[0027] The first transverse section 11 has a through hollow channel 111 along the thickness direction. The inner wall of the hollow channel 111 is machined with internal threads that match the limiting bolt 32. The second transverse section 13 has a first threaded hole 131 at a position coaxial with the hollow channel 111. The crane crossbeam 4 body has a second threaded hole that matches the limiting bolt 32 along its own thickness direction. During assembly and locking, the limiting bolt 32 passes through the hollow channel 111 from top to bottom, extends into the accommodating space 14 formed by the cover plate 2 and the C-shaped slot 1, and then passes into the second threaded hole of the crane crossbeam 4. The end of the limiting bolt 32 is continuously screwed and locked inside the first threaded hole 131 of the second transverse section 13. By using the limiting bolt 32 to bridging the first transverse section 11, the crane crossbeam 4, and the second transverse section 13, the C-shaped slot 1 and the crane crossbeam 4 are rigidly connected, which improves the overall connection and load-bearing stability between the auxiliary tooling and the crane crossbeam 4, and improves the original single-point bolt stress concentration defect.

[0028] In some embodiments, the ends of the first transverse segment 11 and the second transverse segment 13 furthest from the connecting segment 12 are connected to an extension segment 15, such as... Figure 3 As shown, the extension segment 15 is perpendicular to the first transverse segment 11 and the second transverse segment 13, and parallel to the cover plate 2.

[0029] The extension section 15 has several third threaded holes 151, and correspondingly, the two sections of the cover plate 2 each have fourth threaded holes 21 that correspond one-to-one with the positions of the third threaded holes 151. During assembly, the mounting bolts 31 are passed through the third threaded holes 151 on the extension section 15 and the fourth threaded holes 21 on the cover plate 2 to complete the rigid connection between the cover plate 2 and the C-shaped slot 1.

[0030] For example, such as Figure 4 As shown, two third threaded holes 151 are symmetrically opened on the extension section 15 of the first transverse section 11, and two third threaded holes 151 are also symmetrically opened on the extension section 15 of the second transverse section 13. Two symmetrically arranged fourth threaded holes 21 are opened on one side of the first transverse section 11 and on one side of the second transverse section 13. Using multiple threaded holes on both sides for alignment and locking can distribute the load of the single-hole bolt, further improving the connection rigidity between the cover plate 2 and the C-shaped groove 1, and reducing the probability of threaded hole cracking and deformation under heavy-load hoisting conditions.

[0031] The first transverse segment 11, the connecting segment 12, the second transverse segment 13, and the extension segment 15 are connected by integral molding or welding; the connection between the lifting ring 132 and the second transverse segment 13 can also be integral molding or welding.

[0032] In some embodiments, the first threaded hole 131 on the second transverse section 13 and the fourth threaded hole 21 on the cover plate 2 are both set as blind holes (non-through threaded holes). That is, the opening depth of the first threaded hole 131 is less than the thickness of the second transverse section 13. After the limiting bolt 32 is tightened, the end of the limiting bolt 32 will not penetrate the second transverse section 13. Similarly, the opening depth of the fourth threaded hole 21 is less than the thickness of the cover plate 2 itself. After the mounting bolt 31 is locked, the end of the mounting bolt 31 is housed inside the cover plate 2 and will not protrude from the cover plate 2, thus avoiding the potential for the bolt end to protrude and interfere with the assembly of the absorbing chain 5 or scratch the lifting device.

[0033] In some embodiments, the edges of the opening of the hollow channel 111 on the first transverse section 11 and the outer edge of the lifting ring 132 are rounded; the stress concentration caused by the sharp corners of the structure is eliminated by the arc transition, thereby improving the fatigue resistance of the auxiliary tooling.

[0034] The present invention also provides a method for using the above-mentioned auxiliary tooling, the steps of which are as follows:

[0035] S1, Auxiliary tooling pre-assembly and alignment The auxiliary tooling is disassembled into two separate components: a C-shaped slot 1 and a cover plate 2. The C-shaped slot 1 is clamped onto the outside of the crane crossbeam 4 from the side. After assembly, the first transverse section 11 fits against the upper surface of the crane crossbeam 4, the connecting section 12 fits against the side of the crane crossbeam 4, and the second transverse section 13 fits against the lower surface of the crane crossbeam 4. The outer wall of the crane crossbeam 4 is tightly fitted against the inner wall of the three-section structure of the C-shaped slot 1, so that the entire crane crossbeam 4 is housed in the inner space of the C-shaped slot 1, that is, in the space enclosed by the first transverse section 11, the connecting section 12, and the second transverse section 13.

[0036] Fine-tune the horizontal and vertical positions of the C-slot to ensure that the hollow channel 111 of the first horizontal section 11, the first threaded hole 131 of the second horizontal section 13, and the second threaded hole of the crane crossbeam 4 are coaxially aligned, thus reserving an assembly reference for the subsequent limit bolt 32.

[0037] S2, Auxiliary tooling and crane steel beam assembly You can choose one of the following two assembly sequences:

[0038] Option 1: After the C-shaped slot 1 is aligned, insert the limiting bolt 32 from top to bottom into the hollow channel 111, then through the second threaded hole of the crane crossbeam 4, and screw the end into the first threaded hole 131 of the second transverse section 13 and tighten it to lock it in place. Use the limiting bolt 32 to pre-tighten and fix the C-shaped slot 1 to the crane crossbeam 4. Then, align the fourth threaded holes 21 at both ends of the cover plate 2 with the third threaded holes 151 on the extension section 15 of the first transverse section 11 and the second transverse section 13, respectively. Use the mounting bolt 31 to pass through the corresponding third threaded hole 151 and fourth threaded hole 21 in sequence and tighten it to complete the assembly of the cover plate 2 and the C-shaped slot 1.

[0039] Option 2: After the C-type slot 1 is aligned, first fasten the cover plate 2 onto the open end of the C-type slot 1, so that the fourth threaded holes 21 at both ends of the cover plate 2 match the third threaded holes 151 on the extension section 15 of the first transverse section 11 and the second transverse section 13. The mounting bolts 31 pass through the third threaded holes 151 and the fourth threaded holes 21 and are locked. First, fix the cover plate 2 to the C-type slot 1; then insert the limiting bolts 32 to complete the connection between the C-type slot 1 and the crane crossbeam 4.

[0040] The two assembly sequences can be flexibly selected based on the available work space and operating habits.

[0041] After the single set of auxiliary tooling is fastened to the crane crossbeam 4, the code-absorbing chain 5 is connected to the lifting ring 132 at the bottom of the second transverse section 13.

[0042] It should be noted that the number of auxiliary tools used can be flexibly arranged according to the specifications of the workpiece to be transferred (such as steel plate) and the lifting load requirements. Multiple sets of auxiliary tools are evenly distributed along the length of the crane beam 4, and the suction chain 5 is suspended at multiple points to achieve multi-point distribution of the lifting load.

[0043] Subsequently, the 48-bar chuck is moved to directly above the steel plate to be transferred. The vertical height of the electromagnetic chuck 6 at the lower end of the barcode chain 5 is adjusted so that the electromagnetic chuck 6 adheres to the surface of the steel plate and completes the adsorption. After the electromagnetic chuck 6 has firmly adsorbed the plate, its height is raised, and the barcode chuck is driven to move horizontally along the track to the target unloading point. The electromagnetic chuck 6 is lowered again to smoothly drop and place the steel plate, thus completing the single batch of steel plate transfer and material handling process.

[0044] After the marine 48 suction code crane operation is completed, first disassemble the suction code chain 5 from the lifting ring 132; then loosen all the mounting bolts 31 and limit bolts 32 in sequence, disassemble the cover plate 2 and C-shaped slot 1, and remove the entire set of auxiliary tools from the crane beam 4. The auxiliary tools can be repeatedly stored and reused for subsequent lifting operations.

[0045] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An auxiliary tooling suitable for a marine 48-speed traction crane, characterized in that, include: The C-shaped slot includes a first horizontal segment, a connecting segment, and a second horizontal segment connected in sequence. The first horizontal segment and the second horizontal segment are arranged in parallel. The connecting segment is perpendicular to the first horizontal segment and the second horizontal segment, and both ends of the connecting segment are connected to the first horizontal segment and the second horizontal segment, respectively. A cover plate is located on the side of the first transverse segment and the second transverse segment away from the connecting segment. The cover plate, the first transverse segment, the connecting segment and the second transverse segment together enclose a receiving space for accommodating the traveling beam. A lifting ring, installed on the side of the second transverse segment away from the first transverse segment, is used to connect to a code-absorbing chain; The connecting assembly includes mounting bolts and limiting bolts, and the cover plate is connected to the first transverse segment and the second transverse segment by the mounting bolts; The first transverse section has a hollow channel along the thickness direction, and the inner wall of the hollow channel is machined with internal threads. The second transverse section has a first threaded hole at a position coaxial with the hollow channel. The limiting bolts pass through the hollow channel in sequence, extend into the accommodating space, and pass through the second threaded hole on the crane beam that matches the limiting bolts. The end of the limiting bolt is locked in the first threaded hole so that the C-shaped slot and the crane beam form a rigid connection.

2. The auxiliary tooling according to claim 1, characterized in that, Both the first transverse segment and the second transverse segment have extension segments connected to their ends furthest from the connecting segment; The extension section has several third threaded holes, and the two ends of the cover plate have fourth threaded holes that correspond one-to-one with the positions of the third threaded holes. The mounting bolt passes through the third threaded holes and the fourth threaded holes and is locked.

3. The auxiliary tooling according to claim 2, characterized in that, The extension segment is perpendicular to the first transverse segment and the second transverse segment, and is arranged parallel to the cover plate.

4. The auxiliary tooling according to claim 2 or 3, characterized in that, Both the first threaded hole and the fourth threaded hole are blind holes. The opening depth of the first threaded hole is less than the thickness of the second transverse section, and the opening depth of the fourth threaded hole is less than the thickness of the cover plate itself.

5. The auxiliary tooling according to claim 1, characterized in that, The edges of the hollow channel opening on the first transverse section and the outer edge of the lifting ring are both provided with rounded structures.

6. The auxiliary tooling according to claim 2, characterized in that, The first transverse segment, the connecting segment, the second transverse segment, and the extension segment are connected by integral molding or welding; or, The connection between the lifting ring and the second transverse section is either integrally formed or welded.

7. A method of using the auxiliary tooling for a marine 48-speed traction crane as described in any one of claims 1-6, characterized in that, The steps are as follows: The C-shaped slot is inserted into the crane crossbeam from the side, so that the crane crossbeam is housed within the space formed by the first transverse section, the connecting section, and the second transverse section; the position of the C-shaped slot is adjusted so that the hollow channel on the first transverse section, the first threaded hole on the second transverse section, and the second threaded hole on the crane crossbeam are coaxially aligned. After the C-shaped slot is aligned, one of the following two assembly methods is used to complete the locking assembly between the cover plate, the C-shaped slot, and the crane crossbeam: Method 1: The limiting bolt passes through the second threaded hole of the hollow channel and the traveling beam in sequence, and the end is screwed into the first threaded hole of the second transverse section and tightened; then the cover plate is fixedly connected to the C-shaped slot by the mounting bolt; Method 2: First, fasten the cover plate to the opening end of the C-shaped slot, and use the mounting bolts to fix the cover plate to the C-shaped slot; then, use the limiting bolts to pass through the second threaded holes of the hollow channel and the traveling beam in sequence, and screw the end into the first threaded hole of the second transverse section and tighten it to complete the connection between the C-shaped slot and the traveling beam.

8. The method of use according to claim 7, characterized in that, Both the first transverse segment and the second transverse segment have extension segments connected to their ends furthest from the connecting segment; The extended section is provided with a plurality of third threaded holes, and the two ends of the cover plate are respectively provided with fourth threaded holes that correspond one-to-one with the positions of the third threaded holes; The specific steps for fixing the cover plate to the C-shaped slot are as follows: Align the fourth threaded holes at both ends of the cover plate with the third threaded holes on the extension sections of the first transverse section and the second transverse section, respectively, and use the mounting bolts to pass through the corresponding third threaded holes and fourth threaded holes in sequence and tighten them.

9. The method of use according to claim 7, characterized in that, The steps also include: The number of auxiliary tools used is determined according to the specifications of the workpiece to be transferred and the size of the lifting load. Multiple sets of auxiliary tools are arranged at intervals along the length of the crane beam.

10. The method of use according to claim 7, characterized in that, The steps also include: After the operation of the marine 48 absorbing code crane is completed, first disassemble the absorbing code chain from the lifting ring; then loosen all the mounting bolts and the limiting bolts in sequence, separate the cover plate and the C-shaped slot, and remove the entire set of auxiliary tooling from the crane crossbeam.

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