Method for replacing a hook beam of a metallurgical casting crane

Abstract

This invention discloses a method for replacing the hook beam of a metallurgical casting crane, belonging to the field of tooling. The method includes: pre-operation preparation, back-to-back placement of the hook beams, removal of the old pulley block, installation and relocation of the online wire rope fixing device, and installation of the new pulley block. Compared with existing technologies, it is faster and more convenient.

Description

Technical Field

[0001] This invention relates to a tooling method, and more particularly to a method for replacing the hook beam of a metallurgical casting crane. Background Technology

[0002] The steelmaking system of metallurgical enterprises is basically equipped with 480T metallurgical casting cranes. During the steelmaking process, they lift molten iron and pour it into the metallurgical converter. The working environment determines that the service life of the plate hooks, pulleys and hook beams is limited.

[0003] Currently, hook beam replacement is often performed using either the wire rope extraction and re-threading method or the wire rope cutting and relocation method, both of which require manipulation of the wire rope. The wire rope extraction and re-threading method (e.g., "A Method for Replacing Wire Rope Using an Auxiliary Device" CN103588092B) does not damage the wire rope, but it requires repeated threading from the pulley, resulting in a large workload and a processing time of approximately 28 hours, significantly impacting production. Furthermore, there is a risk of wire rope detachment and injury during this process. The wire rope cutting and relocation method (e.g., "A Quick Method for Replacing Crane Wire Ropes" CN101712443B) avoids the drawback of long processing time, but it requires repeated cutting and welding of the wire rope, posing a risk of weld breakage and falling wire rope. Additionally, the wire rope may become unusable due to cutting, leading to higher maintenance costs. Moreover, the wire rope cutting and relocation method for hook beam replacement requires not only the hook beam itself but also space for a wire rope rack, placing significant demands on the available space at the maintenance site.

[0004] Therefore, there is an urgent need in production for a device and method that can more quickly replace the hook beam. Summary of the Invention

[0005] The technical objective of this invention is to address the shortcomings of the prior art by providing a method for replacing the hook beam of a metallurgical casting crane. This method involves using specialized fixing tools to secure the wire rope, thereby enabling the replacement of the hook beam of the metallurgical casting crane by removing pulleys and moving the wire rope.

[0006] The technical solution of this invention to solve its technical problem is: a method for replacing the hook beam of a metallurgical casting crane, characterized by including the following steps:

[0007] (1) Preparation before operation: The pulley block of the new hook beam needs to be removed before operation;

[0008] (2) Back-to-back placement of hook beams: After selecting the work site, the new hook beam and the old hook beam are placed back to back;

[0009] (3) Removal of old pulley blocks: Remove the old pulley blocks one by one from the old hook beam;

[0010] (4) Installation and relocation of online wire rope fastener: Use the wire rope fastener to fix the wire rope, pull the wire rope out of the pulley groove of the old hook beam, and slowly move it to the pulley groove of the new hook beam;

[0011] (5) Installation of new pulley blocks: The new pulley blocks are installed into the pulley grooves in sequence, and the replacement of the hook beam is completed.

[0012] The wire rope fastener mentioned in step (4) includes multiple fixing plates and connecting bolts; one side of the fixing plate has multiple semi-circular grooves, and both ends of the fixing plate are through holes, and the connecting bolts pass through the through holes and are threadedly connected to the nuts.

[0013] Furthermore, the aforementioned wire rope fastener also includes a clamp, which includes a connecting rod and two claws; a socket adapted to the shape of the claws is provided on one side of the fixing plate, the claws are inserted into the sockets of two adjacent fixing plates, and the two claws are connected by the connecting rod.

[0014] Furthermore, the aforementioned card holder is an adjustable card holder.

[0015] Furthermore, the adjustable clip described above has screw holes at the upper end of the claws, and the connecting rod is a double-ended screw.

[0016] Furthermore, the aforementioned wire rope fastener also includes a protective sleeve with a locking device.

[0017] Furthermore, the aforementioned protective sleeve with locking device includes two semi-circular arc plates, one side of which is hinged. One arc plate has a flip-out locking tongue at its free end edge, and the other arc plate has a latch at a corresponding position at its free end that is compatible with the locking tongue structure.

[0018] Furthermore, the outer diameter of the upper opening of the aforementioned protective sleeve is smaller than the outer diameter of the lower opening, giving it a trapezoidal shape.

[0019] Compared with the prior art, the present invention has the following outstanding advantages:

[0020] 1. By using the method of the present invention, the operation time for replacing the hook beam is shortened from the original 28 hours to 12 hours, greatly improving maintenance efficiency and saving labor costs.

[0021] 2. It avoids the waste of cutting steel wire ropes, reducing maintenance costs by hundreds of thousands of yuan per set;

[0022] 3. The method of the present invention is easy to use and easy to promote. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the placement of the hook beam of the present invention.

[0024] Figure 2 This is a schematic diagram of the wire rope hoisting of the present invention.

[0025] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the wire rope fixing device of the present invention.

[0026] Figure 4 This is a schematic diagram of the use of Embodiment 1 of the wire rope fastener of the present invention.

[0027] Figure 5 This is a schematic diagram of the structure of embodiment 2 of the wire rope fastener of the present invention.

[0028] Figure 6 This is a schematic diagram of the use of the wire rope fixing clip of the present invention.

[0029] Figure 7 This is a schematic diagram of the adjustable clamp of the wire rope fixing device of the present invention.

[0030] Figure 8 This is a schematic diagram of the use of the protective sleeve in Embodiment 3 of the wire rope fixing device of the present invention. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0032] In the following embodiments, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this invention application according to the specific circumstances.

[0033] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," "end," and "side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0034] This invention provides a method for replacing the hook beam of a metallurgical casting crane, comprising the following steps:

[0035] (1) Preparations before the operation:

[0036] Before operation, the pulley block of the new hook beam 10 needs to be removed and the pulley bearings need to be lubricated. Then the pulley blocks need to be prepared in place.

[0037] (2) The hook beams are placed back to back:

[0038] like Figure 1 As shown, after selecting the work site, the new hook beam 10 is placed in the maintenance area in advance, and then the old hook beam 10 is placed back to back on one side of the new hook beam 10, leaving appropriate maintenance space to improve work efficiency.

[0039] (3) Removal of the old pulley system:

[0040] Remove the old pulley blocks one by one from the old hook beam 10.

[0041] (4) Installation and relocation of online wire rope fasteners:

[0042] like Figure 2 As shown, use a wire rope fastener to secure the wire rope 4, and instruct the truck crane to lift the wire rope 4 out of the pulley groove of the old hook beam 10 and slowly move it into the pulley groove of the new hook beam 10.

[0043] (5) Installation of the new pulley block:

[0044] The new pulley blocks are installed sequentially into the pulley grooves. During the process, each wire rope 4 must be matched with the corresponding pulley to prevent misalignment. After installation is completed and finished, the hook beam 10 is replaced.

[0045] The wire rope fastener used includes multiple fixing plates 2 and connecting bolts 1.

[0046] The fixing plate 2 has multiple semi-circular grooves 3 on one side, and the two ends of the fixing plate 2 are through holes. The connecting bolt 1 passes through the through holes and is threadedly connected to the nut.

[0047] like Figure 3 As shown in Embodiment 1, the number of semi-circular grooves 3 on the fixing plate 2 is greater than the number of wire ropes in the pulley block. Only one pair of fixing plates 2 is needed on one side of a pulley block. Figure 4 As shown, the wire rope 4 is placed in the semi-circular groove 3, using the empty groove to achieve distance isolation between the middle rope group and the two side rope groups. The fixing plate 2 has through holes at both ends, through which the connecting bolt 1 passes and is threadedly connected to the nut. Due to its excessive length, the fixing plate 2 also has through holes in the middle section, through which the connecting bolt 1 and the nut pass and are connected.

[0048] The 480T metallurgical casting crane has three sets of wire ropes, with three on each side and six in the middle. In this embodiment, the diameter of the semi-circular groove 3 is 36mm.

[0049] The scheme in Example 1 has the simplest structure, but due to its excessive length, alignment takes a long time and requires two people to work.

[0050] To reduce labor costs, Example 2 was improved. For example... Figure 5 As shown, in Embodiment 2, the fixing plate 2 has three semi-circular grooves 3, and both ends of the fixing plate 2 are through holes. The connecting bolt 1 passes through the through holes and is threadedly connected to the nut. It can be operated by a single person.

[0051] To ensure that the rope assembly maintains a relatively constant original spacing during lifting, and to facilitate quick matching and positioning of the pulley groove after replacement, this embodiment also includes a clamp, which comprises a connecting rod 6 and two claws 5. A socket adapted to the shape of the claws 5 is provided on one side of the fixing plate 2. The claws 5 are inserted into the sockets of two adjacent fixing plates 2, and the two claws 5 are connected by the connecting rod 6 to fix the distance between adjacent fixing plates 2.

[0052] For constant specifications, such as Figure 6 As shown, the connecting rod 6 and the jaw 5 are welded together. For example, in a 480T metallurgical casting crane, there are three clamps. The connecting rod 6 of the middle clamp is short, and the connecting rods 6 of the two side clamps are long. All of them are of fixed specifications and are easy to use.

[0053] To facilitate wider use, such as Figure 7 As shown, the clip is an adjustable clip: the upper end of the claw 5 has a screw hole, and the connecting rod is a double-headed screw 7. The distance between the two claws 5 can be adjusted by the cooperation of the double-headed screw 7 and the screw hole at the upper end of the claw 5 according to the distance to be maintained, and then inserted into the insertion hole.

[0054] Under actual production conditions, the wear of the wire rope 4 varies. Therefore, the wire rope 4 on the same horizontal plane is easily damaged by external forces during the displacement process. Furthermore, if the diameter of the wire rope 4 is smaller than the diameter of the semi-circular groove 3 of the fixing plate 2, the transfer cannot be achieved.

[0055] Example 3: To solve the above problems, a protective sleeve for the wire rope 4 and a locking device 9 were added. The protective sleeve for the wire rope 4 was installed on each wire rope 4 and locked, and then the fixing plate 2 was used for overall transfer.

[0056] like Figure 8 As shown, Embodiment 3, based on Embodiment 1 or 2, further includes a protective sleeve with a locking device 9. The locking device 9 includes a locking tongue and a locking buckle.

[0057] In this embodiment, the protective sleeve includes two arc-shaped plates 8, which are hinged on one side. One arc-shaped plate 8 has a reversible locking tongue at its free end edge, and the other arc-shaped plate 8 has a corresponding locking buckle at its free end that matches the locking tongue structure. The locking device 9, consisting of the locking tongue and the locking buckle, achieves locking. Its specific implementation can vary. The diameter of the arc-shaped plate 8 is the same as the diameter of the steel wire rope 4 to be transferred. In the optimized scheme, the outer diameter of the upper opening of the protective sleeve is smaller than the outer diameter of the lower opening, presenting a trapezoidal shape.

[0058] Example 3 is applicable to a wider range of metallurgical casting crane models, and the diameter of the wire rope 4 does not need to be the same as the semi-circular groove 3 of the fixing plate 2. When the wire rope 4 is thin, a protective sleeve of a suitable model is selected, installed, and locked. Then, the fixing plate 2 is installed above the locking device 9. When the wire rope 4 is lifted, the fixing plate 2 slides down the outer wall of the protective sleeve ladder until it is blocked by the cone or the locking device 9.

[0059] It should be noted that any aspects not described in detail in this embodiment are techniques known in the art.

[0060] The above description is only for the purpose of describing specific embodiments of the present invention in detail. For those skilled in the art, various obvious changes made to it without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. A method for replacing the hook beam of a metallurgical casting crane, characterized in that: Includes the following steps: (1) Preparation before operation: The pulley block of the new hook beam needs to be removed before operation; (2) Back-to-back placement of hook beams: After selecting the work site, the new hook beam and the old hook beam are placed back to back; (3) Removal of old pulley blocks: Remove the old pulley blocks one by one from the old hook beam; (4) Installation and relocation of online wire rope fastener: Use the wire rope fastener to fix the wire rope, pull the wire rope out of the pulley groove of the old hook beam, and slowly move it to the pulley groove of the new hook beam; the wire rope fastener includes multiple fixing plates and connecting bolts; one side of the fixing plate has multiple semi-circular grooves, and both ends of the fixing plate are through holes, and the connecting bolts pass through the through holes and are threaded to the nuts; the wire rope fastener also includes a clamp, which includes a connecting rod and two claws; a socket adapted to the shape of the claws is provided on one side of the fixing plate, and the claws are inserted into the sockets of two adjacent fixing plates, and the two claws are connected by a connecting rod; (5) Installation of new pulley blocks: The new pulley blocks are installed into the pulley grooves in sequence, and the replacement of the hook beam is completed.

2. The method for replacing the hook beam of a metallurgical casting crane according to claim 1, characterized in that: The card holder is an adjustable card holder.

3. The method for replacing the hook beam of a metallurgical casting crane according to claim 2, characterized in that: The adjustable clip has screw holes at the upper end of the claws, and the connecting rod is a double-ended screw.

4. The method for replacing the hook beam of a metallurgical casting crane according to claim 1, characterized in that: The wire rope fastener also includes a protective sleeve with a locking device.

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