A steel wire rope replacement tool and replacement method for a machine arm pulley block

Abstract

The present invention relates to the technical field of wire rope replacement, and specifically to a wire rope replacement tool and replacement method for a boom pulley block, wherein the replacement tool comprises a limit plate, a lifting hole is formed at the bottom of the limit plate, and a plurality of limit members are rotatably provided at the top of the limit plate, and the limit member comprises a sleeve, and a rotating sleeve is rotatably provided at one end of the sleeve, and screws are threadedly connected at both ends of the rotating sleeve, and the screws are threadedly connected with a movable seat; a support plate is provided between the middle of the rotating sleeve corresponding to two movable seats. Compared with the traditional method, the technical solution can effectively limit the wire ropes at different positions by adjusting the position of the limit member through the replacement tool and the wire rope replacement method, thereby shortening the replacement operation time; and the operation is relatively simple, which greatly improves the replacement efficiency. During the entire replacement process, the wire rope is tightly clamped with the limit member, which reduces the problem of wire rope falling and winding, and reduces the operation intensity and cost.

Description

Technical Field

[0001] The invention relates to the technical field of steel wire rope replacement, and in particular to a steel wire rope replacement tool for a boom pulley block and a replacement method. Background Art

[0002] The repair work of the damaged pulley block of the large gantry crane is very tedious and requires a very professional team of welders, fitters, electricians, crane commanders, gantry crane drivers, etc. From the perspective of technical safety, the key points to consider are: 1. The wire rope on the pulley block that needs to be repaired and replaced is separated from the pulley block, and enough space is reserved for the removal of the pulley block; 2. How to keep the weight of the nearly 100-meter wire rope hanging freely; 3. The pulley block has been taken out. Once the wire rope fails to effectively keep it on the ground, all the wire ropes will be entangled with each other. It costs several times more to reorganize the wire rope than to replace it again. It cannot guarantee that the A-frame pulley block and wire rope are not damaged, etc., and the loss is very serious.

[0003] The patent document with patent announcement number: CN115490156A discloses a method for quickly replacing a pulley block on a bridge crane and preventing the wire rope from being damaged by slipping out of the groove. The solution removes the original fixed pressure plate with a wrench; according to the position of the original fixed pressure plate on the inner side of the pulley block, select the corresponding position above the pulley block hole car body, and weld the base base to the edge of the hole; insert the new fixed pressure plate into the fixed slot of the fixed pulley block shaft, and the top of it corresponds to the fixing bolt hole of the base base, select bolts with a diameter of 20mm, and install and fix them with gaskets respectively; when repairing or replacing the pulley block, remove the bolts above the car body, remove the fixed pressure plate to replace the pulley block.

[0004] In the past repair process, link slings were often used to limit the wire ropes on the pulley blocks one by one, and the wire ropes were separated from the pulley blocks under the action of the crane. This method is more troublesome, labor-intensive, and cumbersome, and there is a safety hazard of the wire rope falling. Summary of the invention

[0005] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a tooling and replacement method for a wire rope for a boom pulley block, which solves the problem of the current cumbersome and complicated replacement of the wire rope on the pulley block.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A wire rope replacement tool for a boom pulley block, comprising a limit plate, a lifting hole formed at the bottom of the limit plate, a plurality of limit members rotatably arranged at the top of the limit plate, the limit member comprising a sleeve, a rotating sleeve rotatably arranged at one end of the sleeve, screws threadedly connected at both ends of the rotating sleeve, and a movable seat threadedly connected to the screw;

[0008] A support plate is arranged between the two movable seats in the middle of the rotating sleeve, and the support plate is kept parallel to the movable seat. A limiting column can be detachably connected between the two movable seats, and the limiting column and the support plate are arranged crosswise.

[0009] In some embodiments of the present invention, a plurality of U-shaped grooves are spaced apart at the top of the limit plate, a rotating shaft is rotatably arranged between the plurality of U-shaped grooves, a connecting column is connected to the surface of the rotating shaft corresponding to the opening of the U-shaped groove, and the sleeve is detachably connected to the connecting column.

[0010] In some embodiments of the present invention, the plurality of U-shaped slots are arranged at equal intervals.

[0011] In some embodiments of the present invention, locking bolts are provided on the surface of the limiting plate corresponding to adjacent U-shaped slots, and the moving direction of the locking bolts in the limiting plate is in a cross state with the axial direction of the rotating shaft.

[0012] In some embodiments of the present invention, the inner diameter of the sleeve matches the outer diameter of the connecting column, a contraction seam is provided at the opening at the other end of the sleeve, and a clamp is provided on the surface of the sleeve corresponding to the contraction seam.

[0013] In some embodiments of the present invention, the cross section of the support plate is arc-shaped.

[0014] In some embodiments of the present invention, anti-slip grooves are formed on the surfaces of the support plate and the limiting column.

[0015] In some embodiments of the present invention, half grooves 1 are provided at both ends of the bottom of the movable seat, and half grooves 2 are provided at the top of the support plate opposite to the half grooves 1. The contour size formed by the overlap of half grooves 1 and 2 matches the size of the limiting column.

[0016] A method for replacing a steel wire rope for a boom pulley assembly comprises the following steps:

[0017] S1. Make preparations before replacement, check and prepare the wire rope replacement tooling for the boom pulley assembly, ensure that the limit plate and limit parts are not damaged and function normally; check whether the lifting holes at the bottom of the limit plate are intact and can be used for subsequent lifting operations; confirm that multiple limit parts can rotate flexibly on the top of the limit plate, and its various components such as sleeves, swivel sleeves, screws, movable seats, support plates, and limit columns are firmly connected and can operate normally;

[0018] Prepare the necessary tools, such as wrenches and screwdrivers, for removing and installing related parts; also prepare lifting equipment, such as cranes or hoists, whose lifting capacity must meet the weight requirements of the pulley block and wire rope;

[0019] Organize a professional maintenance team, including welders, fitters, electricians, crane commanders, and gantry crane operators, clarify the responsibilities of each person, and ensure collaborative work during the replacement process;

[0020] S2. Perform position limiting protection on the wire rope on the pulley block. According to the position and structure of the pulley block, install the limit plate of the replacement tooling at a suitable position to ensure that it can cover the part of the wire rope that needs to be protected; rotate the limit piece on the top of the limit plate and adjust its position so that each limit piece corresponds to one wire rope;

[0021] For each stopper, first put the sleeve on the connecting column and tighten it with a clamp, so as to fix each stopper at a corresponding position on the rotating shaft. Since multiple U-shaped slots are arranged at equal intervals, each stopper can be conveniently and accurately positioned;

[0022] Rotate the rotating sleeve to make it at a suitable angle, and use the locking bolt to limit the rotating shaft so as to facilitate the subsequent installation of the movable seat and the limiting column;

[0023] Connect the movable seat to the two ends of the rotating sleeve through screw threads, and adjust the position of the movable seat so that the distance between the two movable seats is suitable for placing the limit column; the half grooves 1 at both ends of the bottom of the movable seat overlap with the half grooves 2 at the top of the support plate to form a contour that matches the size of the limit column, which is convenient for the installation of the limit column;

[0024] Corresponding to the position of the wire rope, a support plate is used to fit the surface of the wire rope, and then the limit column is placed between the two movable seats, so that it is cross-set with the support plate to form a limit space for the wire rope, and then the screw is turned to make the limit column and the movable seat move down synchronously, and the limit column and the wire rope are closely abutted; the support plate has an arc-shaped cross-section, and both it and the limit column have anti-slip patterns on their surfaces, which can better fix the wire rope and prevent it from sliding;

[0025] Check the limiting condition of each limiter on the wire rope to ensure that the wire rope is firmly located in the limiting space and will not fall out; check the limiting effect by slightly shaking the wire rope, and if necessary, further adjust the position or angle of the limiter;

[0026] S3. Take out the pulley block. After ensuring that the wire rope has been effectively limited and protected, command the lifting equipment to slowly lift the pulley block so that the wire rope on the pulley block gradually separates from the pulley block. During the lifting process, pay close attention to the state of the wire rope to ensure that it will not be entangled with the pulley block or separate from the replacement tooling; when the wire rope is completely separated from the pulley block, move the pulley block to a suitable location for storage or repair and replacement;

[0027] S4. Install the new pulley block, lift the new pulley block to the installation location and align it with the corresponding components; with the assistance of the lifting equipment, slowly lower the new pulley block so that the wire rope gradually enters the rope groove of the new pulley block. During this process, ensure that the wire rope is correctly located in the rope groove to avoid deflection or jamming; adjust the position of the pulley block to install it in place, and tighten it according to the installation requirements of the equipment, and ensure that the tightening degree meets the standards;

[0028] S5. Remove and replace the tooling. After the new pulley block is installed and the wire rope is installed correctly, start to remove and replace the tooling. First, turn the limit piece on the top of the limit plate to make it leave the wire rope. For each limit piece, loosen the screw, remove the movable seat from the rotating sleeve, take out the limit column, then loosen the clamp, remove the sleeve from the connecting column, and finally, move the limit plate away from the working position to complete the entire replacement process.

[0029] Beneficial effects of the present invention:

[0030] Compared with the traditional method, this technical solution can effectively limit the wire ropes at different positions by replacing the tooling and the wire rope replacement method and adjusting the position of the limiter, thereby shortening the replacement operation time. Moreover, the operation is relatively simple, which greatly improves the replacement efficiency. During the entire replacement process, the wire rope is tightly clamped with the limiter, which reduces the problem of wire rope falling and entanglement, reduces the operation intensity and cost, and reduces the occurrence of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Figure 1 It is a schematic diagram of the process of the wire rope replacement method in the present invention;

[0033] Figure 2 It is a three-dimensional view of the replacement tool in the present invention;

[0034] Figure 3 is a three-dimensional view of the limiting member in the present invention;

[0035] Figure 4 This is a three-dimensional view of the limiting member after hiding the limiting column in the present invention;

[0036] Figure 5 It is a side view of the limiting member in the present invention.

[0037] In the figure: 1. limit plate; 11. lifting hole; 12. U-shaped slot; 13. rotating shaft; 14. connecting column; 15. locking bolt; 2. limit piece; 21. sleeve; 22. contraction joint; 23. clamp; 24. rotating sleeve; 25. screw; 26. movable seat; 261. half slot one; 27. support plate; 271. half slot two; 28. limit column. DETAILED DESCRIPTION

[0038] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 2 As shown, a wire rope replacement tool for a boom pulley block includes a limit plate 1, a lifting hole 11 is formed at the bottom of the limit plate 1, and the lifting hole 11 is used to connect a lifting device. A plurality of limit members 2 are rotatably provided on the top of the limit plate 1, and the limit member 2 includes a sleeve 21, and a rotating sleeve 24 is rotatably provided at one end of the sleeve 21, and screws 25 are threadedly connected at both ends of the rotating sleeve 24, and a movable seat 26 is threadedly connected to the screw 25;

[0040] A support plate 27 is arranged between the two movable seats 26 in the middle of the rotating sleeve 24 . The support plate 27 and the movable seats 26 are kept parallel. A limiting column 28 can be detachably connected between the two movable seats 26 . The limiting column 28 and the support plate 27 are arranged crosswise.

[0041] The replacement tool comprises a limiting plate 1 and a plurality of limiting members 2 rotatably arranged on the top thereof. By adjusting the positions of the limiting members 2, the steel wire ropes at different positions can be effectively limited.

[0042] In some embodiments of the present invention, Figure 2 As shown, a plurality of U-shaped slots 12 are spaced apart at the top of the limit plate 1, and the plurality of U-shaped slots 12 are arranged at equal intervals, a rotating shaft 13 is rotatably arranged between the plurality of U-shaped slots 12, a connecting column 14 is connected to the surface of the rotating shaft 13 corresponding to the opening of the U-shaped slot 12, and the sleeve 21 is detachably connected to the connecting column 14.

[0043] As the basic structure of the entire replacement tool, the limit plate 1 carries multiple limit members 2, and multiple U-shaped slots 12 arranged at equal intervals provide accurate and regular installation positions for the limit members 2, which facilitates the accurate arrangement of the limit members 2 according to the distribution of the wire ropes on the pulley block, ensuring that each wire rope can be effectively limited. In addition, the combination of the rotating shaft 13 and the connecting column 14 enables the limit members 2 to rotate flexibly on the top of the limit plate 1, which facilitates the adjustment of the angle of the limit members 2, so that it can better adapt to wire ropes in different positions and directions, and improves the versatility of the tool for different pulley block structures.

[0044] In some embodiments of the present invention, Figure 2As shown, locking bolts 15 are provided between the adjacent U-shaped slots 12 on the surface of the limit plate 1, and the moving direction of the locking bolts 15 in the limit plate 1 is in a cross state with the axial direction of the rotating shaft 13. After adjusting the position of the limit member 2, the locking bolts 15 can lock the rotating shaft 13 to prevent the limit member 2 from accidentally rotating during use, thereby ensuring the stability of the limit. This is extremely important in the maintenance of large gantry crane arm pulley blocks, which require extremely high safety and stability, to avoid the wire rope from being out of the limit due to the movement of the limit member 2, thereby causing a safety accident or affecting the smooth progress of the maintenance work.

[0045] In some embodiments of the present invention, the inner diameter of the sleeve 21 matches the outer diameter of the connecting column 14 , a contraction seam 22 is provided at the opening at the other end of the sleeve 21 , and a clamp 23 is provided on the surface of the sleeve 21 corresponding to the contraction seam 22 .

[0046] The sleeve 21 is detachably connected to the connecting column 14 through the shrinkage seam 22 and the clamp 23, which facilitates the installation and removal of the limit member 2. At the same time, to a certain extent, the sleeve 21 is allowed to have a certain radial adjustment space on the connecting column 14 to better adapt to the U-shaped slots 12 with different spacings or position deviations caused by manufacturing tolerances and the like.

[0047] In addition, the rotating connection between the rotating sleeve 24 and the sleeve 21 and the threaded connection between the rotating sleeve 24 and the movable seat 26 and the screw 25 enable the movable seat 26 and the support plate 27 and other components to flexibly adjust the angle and position in three-dimensional space, so as to accurately adapt to the direction of the wire rope and effectively limit the wire rope in all directions. Whether it is a wire rope in a horizontal direction, a vertical direction or an inclined direction, stable limiting can be achieved by adjusting the various components of the limiting member 2.

[0048] In some embodiments of the present invention, Figure 3 , Figure 4 , Figure 5 As shown, the cross section of the support plate 27 is arc-shaped, and the surfaces of the support plate 27 and the limiting column 28 are formed with anti-skid patterns. The cross section of the support plate 27 is arc-shaped, and its shape is adapted to the circular cross section of the wire rope, which can better fit the wire rope, increase the contact area, disperse the pressure, and provide more stable support. At the same time, the anti-skid patterns on the surfaces of the support plate 27 and the limiting column 28 increase the friction between the wire rope and the support plate 27, further preventing the wire rope from sliding during the limiting process, ensuring that during the maintenance of the pulley block, even if it is disturbed by a certain external force (such as shaking during the lifting process, etc.), the wire rope can be firmly maintained in the limiting space, and will not be separated from the limiting member 2 to cause safety hazards or affect the maintenance work.

[0049] In some embodiments of the present invention, Figure 3 , Figure 4As shown, half grooves 261 are provided at both ends of the bottom of the movable seat 26, and half grooves 271 are provided at the top of the support plate 27 at a position opposite to the half grooves 261. The outline size formed by the overlap of the half grooves 261 and 271 matches the size of the limiting column 28.

[0050] The connection mode of the movable seat 26 with the rotating sleeve 24 and the screw 25 and the cooperation with the limiting column 28 enable the limiting column 28 to be firmly installed between the two movable seats 26, and form a stable limiting space together with the support plate 27. The half groove 1 261 at the bottom of the movable seat 26 and the half groove 2 271 at the top of the support plate 27 overlap to form a profile matching the size of the limiting column 28, ensuring the accuracy and stability of the limiting column 28 after being installed between the two movable seats 26, ensuring that the size and shape of the limiting space can accurately adapt to the wire rope, and preventing the wire rope from escaping from the gap in the limiting space.

[0051] In the repair work of the damaged pulley block of the arm frame of a large gantry crane, this replacement tooling structure solves many problems faced in the background technology. For example, it effectively avoids the situation where the wire ropes are entangled with each other due to improper protection during the repair of the pulley block, reducing the huge cost of arranging or replacing the wire ropes; it ensures that the weight of the nearly 100-meter wire rope hanging freely when the pulley block is taken out can be reliably protected to prevent the wire rope from falling to the ground and being damaged; it provides a strong guarantee for the wire rope on the pulley block to detach from the pulley block and reserve enough space to facilitate the removal of the pulley block, while reducing the troublesome, labor-intensive and tedious operation of limiting the wire ropes on the pulley block one by one in the traditional method, improving the efficiency and safety of the maintenance work, and reducing the difficulty and intensity requirements for the work of the professional team.

[0052] In order to achieve the above-mentioned purpose of replacing the tooling, Figure 1 As shown, the present invention also provides a method for replacing a steel wire rope for a boom pulley assembly, comprising the following steps:

[0053] S1. Make preparations before replacement, check and prepare the wire rope replacement tooling for the boom pulley block, ensure that the limit plate 1 and the limit piece 2 are not damaged and function normally; check whether the lifting hole 11 at the bottom of the limit plate 1 is intact and can be used for subsequent lifting operations; confirm that multiple limit pieces 2 can rotate flexibly on the top of the limit plate 1, and their components such as the sleeve 21, the rotating sleeve 24, the screw 25, the movable seat 26, the support plate 27, and the limit column 28 are firmly connected and can operate normally;

[0054] Prepare the necessary tools, such as wrenches and screwdrivers, for removing and installing related parts; also prepare lifting equipment, such as cranes or hoists, whose lifting capacity must meet the weight requirements of the pulley block and wire rope;

[0055] Organize a professional maintenance team, including welders, fitters, electricians, crane commanders, and gantry crane operators, clarify the responsibilities of each person, and ensure collaborative work during the replacement process;

[0056] S2. Perform position limiting protection on the wire rope on the pulley block. According to the position and structure of the pulley block, install the limit plate 1 of the replacement tool at a suitable position to ensure that it can cover the part of the wire rope that needs to be protected; rotate the limit piece 2 on the top of the limit plate 1 and adjust its position so that each limit piece 2 corresponds to a wire rope;

[0057] For each stopper 2, firstly, the sleeve 21 is put on the connecting column 14, and fastened by the clamp 23, so that each stopper 2 is fixed at a corresponding position on the rotating shaft 13. Since the multiple U-shaped slots 12 are arranged at equal intervals, each stopper 2 can be conveniently and accurately positioned;

[0058] Rotate the rotating sleeve 24 to make it at a suitable angle, and use the locking bolt 15 to limit the rotating shaft 13 so as to facilitate the subsequent installation of the movable seat 26 and the limiting column 28;

[0059] The movable seat 26 is threadedly connected to the two ends of the rotating sleeve 24 by means of screws 25, and the position of the movable seat 26 is adjusted so that the distance between the two movable seats 26 is suitable for placing the limiting column 28; the half grooves 1 261 at the two ends of the bottom of the movable seat 26 overlap with the half grooves 271 at the top of the support plate 27 to form a profile matching the size of the limiting column 28, which is convenient for the installation of the limiting column 28;

[0060] Corresponding to the position of the steel wire rope, a support plate 27 is used to fit the surface of the steel wire rope, and then the limiting column 28 is placed between the two movable seats 26, so that it is cross-set with the support plate 27 to form a limiting space for the steel wire rope, and then the screw 25 is screwed to make the limiting column 28 and the movable seat 26 move down synchronously, and the limiting column 28 is closely abutted against the steel wire rope; the cross-section of the support plate 27 is arc-shaped, and both the surface of the support plate 27 and the limiting column 28 have anti-slip patterns, which can better fix the steel wire rope and prevent it from sliding;

[0061] Check the limiting condition of each limiting member 2 on the wire rope to ensure that the wire rope is firmly located in the limiting space and will not fall out; check the limiting effect by slightly shaking the wire rope, and if necessary, further adjust the position or angle of the limiting member 2;

[0062] S3. Take out the pulley block. After ensuring that the wire rope has been effectively limited and protected, command the lifting equipment to slowly lift the pulley block so that the wire rope on the pulley block gradually separates from the pulley block. During the lifting process, pay close attention to the state of the wire rope to ensure that it will not be entangled with the pulley block or separate from the replacement tooling; when the wire rope is completely separated from the pulley block, move the pulley block to a suitable location for storage or repair and replacement;

[0063] S4. Install the new pulley block, lift the new pulley block to the installation location and align it with the corresponding components; with the assistance of the lifting equipment, slowly lower the new pulley block so that the wire rope gradually enters the rope groove of the new pulley block. During this process, ensure that the wire rope is correctly located in the rope groove to avoid deflection or jamming; adjust the position of the pulley block to install it in place, and tighten it according to the installation requirements of the equipment, and ensure that the tightening degree meets the standards;

[0064] S5. Remove and replace the tooling. After the new pulley block is installed and the wire rope is installed correctly, start to remove and replace the tooling; first, rotate the limit piece 2 on the top of the limit plate 1 to make it leave the wire rope; for each limit piece 2, loosen the screw 25, remove the movable seat 26 from the rotating sleeve 24, take out the limit column 28, then loosen the clamp 23, remove the sleeve 21 from the connecting column 14, and finally, move the limit plate 1 away from the working position to complete the entire replacement process.

[0065] During the entire replacement process, technical safety specifications must always be followed, the lifting commander must accurately direct the lifting equipment, and all maintenance personnel must work closely together to ensure that the replacement work proceeds smoothly while avoiding damage to the equipment and ensuring personnel safety.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A wire rope replacement tool for a boom pulley block, comprising a limit plate, characterized in that: A hanging hole is formed at the bottom of the limiting plate, and a plurality of limiting members are rotatably arranged at the top of the limiting plate. The limiting members include a sleeve, and a rotating sleeve is rotatably arranged at one end of the sleeve. Both ends of the rotating sleeve are threadedly connected with screws, and the screws are threadedly connected with a movable seat; A support plate is arranged between the two movable seats in the middle of the rotating sleeve, the support plate and the movable seats are kept parallel, and a limit column can be detachably connected between the two movable seats, and the limit column and the support plate are arranged crosswise; A plurality of U-shaped slots are arranged at intervals on the top of the limiting plate, a rotating shaft is rotatably arranged between the plurality of U-shaped slots, a connecting column is connected to the surface of the rotating shaft corresponding to the opening of the U-shaped slot, and the sleeve is detachably connected to the connecting column; A locking bolt is arranged between the adjacent U-shaped slots on the surface of the limit plate, and the moving direction of the locking bolt in the limit plate is in a cross state with the axial direction of the rotating shaft; The inner diameter of the sleeve matches the outer diameter of the connecting column, a contraction seam is provided at the opening at the other end of the sleeve, and a clamp is provided on the surface of the sleeve corresponding to the contraction seam; Both ends of the bottom of the movable seat are provided with half grooves 1, and the top of the support plate is provided with half grooves 2 at a position opposite to the half grooves 1. The outline size formed by the overlap of the half grooves 1 and 2 matches the size of the limit column.

2. The wire rope replacement tool for a boom pulley block according to claim 1 is characterized in that: The multiple U-shaped slots are arranged at equal intervals.

3. The wire rope replacement tool for a boom pulley block according to claim 2 is characterized in that: The cross section of the supporting plate is arc-shaped.

4. The wire rope replacement tool for a boom pulley block according to claim 3 is characterized in that: Anti-slip grooves are formed on the surfaces of the support plate and the limiting column.

5. A method for replacing a steel wire rope for a boom pulley block, applied to the steel wire rope replacement tool as claimed in claim 4, characterized in that: The following steps are involved: S1. Make preparations before replacement, check and prepare the wire rope replacement tooling for the boom pulley assembly, ensure that the limit plate and limit parts are not damaged and function normally; check whether the lifting holes at the bottom of the limit plate are intact and can be used for subsequent lifting operations; confirm that multiple limit parts can rotate flexibly on the top of the limit plate, and its various components such as sleeves, swivel sleeves, screws, movable seats, support plates, and limit columns are firmly connected and can operate normally; Prepare the necessary tools, such as wrenches and screwdrivers, for removing and installing related parts; also prepare lifting equipment, such as cranes or hoists, whose lifting capacity must meet the weight requirements of the pulley block and wire rope; S2. Perform position limiting protection on the wire rope on the pulley block. According to the position and structure of the pulley block, install the limit plate of the replacement tooling at a suitable position to ensure that it can cover the part of the wire rope that needs to be protected; rotate the limit piece on the top of the limit plate and adjust its position so that each limit piece corresponds to one wire rope; For each stopper, first put the sleeve on the connecting column and tighten it with a clamp, so as to fix each stopper at a corresponding position on the rotating shaft. Since multiple U-shaped slots are arranged at equal intervals, each stopper can be conveniently and accurately positioned; Rotate the rotating sleeve to make it at a suitable angle, and use the locking bolt to limit the rotating shaft so as to facilitate the subsequent installation of the movable seat and the limiting column; Connect the movable seat to the two ends of the rotating sleeve through screw threads, and adjust the position of the movable seat so that the distance between the two movable seats is suitable for placing the limit column; the half grooves 1 at both ends of the bottom of the movable seat overlap with the half grooves 2 at the top of the support plate to form a contour that matches the size of the limit column, which is convenient for the installation of the limit column; Corresponding to the position of the wire rope, use the support plate to fit the surface of the wire rope, and then place the limit column between the two movable seats so that it is cross-set with the support plate to form a limit space for the wire rope, and then tighten the screw to make the limit column and the movable seat move down synchronously, so that the limit column and the wire rope are closely abutted; The support plate has an arc-shaped cross section, and both it and the limit column have anti-slip grooves on their surfaces; Check the limiting condition of each limiting part on the wire rope to ensure that the wire rope is firmly located in the limiting space and will not fall out; S3. Take out the pulley block. After ensuring that the wire rope has been effectively limited and protected, command the lifting equipment to slowly lift the pulley block so that the wire rope on the pulley block gradually separates from the pulley block. During the lifting process, pay close attention to the state of the wire rope to ensure that it will not be entangled with the pulley block or separate from the replacement tooling; when the wire rope is completely separated from the pulley block, move the pulley block to a suitable location for storage or repair and replacement; S4. Install the new pulley block, lift the new pulley block to the installation location and align it with the corresponding components; with the assistance of the lifting equipment, slowly lower the new pulley block so that the wire rope gradually enters the rope groove of the new pulley block. During this process, ensure that the wire rope is correctly located in the rope groove to avoid deflection or jamming; adjust the position of the pulley block to install it in place, and tighten it according to the installation requirements of the equipment, and ensure that the tightening degree meets the standards; S5. Remove and replace the tooling. After the new pulley block is installed and the wire rope is installed correctly, start to remove and replace the tooling. First, turn the limit piece on the top of the limit plate to make it leave the wire rope. For each limit piece, loosen the screw, remove the movable seat from the rotating sleeve, take out the limit column, then loosen the clamp, remove the sleeve from the connecting column, and finally, move the limit plate away from the working position to complete the entire replacement process.

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