Anti-cracking method for welding seam of vertical speed reducer mounting base of crane

Abstract

The invention belongs to the technical field of equipment mounting, and provides an anti-cracking method for a welding seam of a mounting base of a vertical speed reducer of a crane, which comprises the following steps of: welding a reinforcing block and an auxiliary block at an easily-cracked welding seam of a longitudinal rib plate of the mounting base of the vertical speed reducer and a steel plate of a trolley body; the reinforcing block is welded between the positioning plate of the mounting base and the trolley body steel plate and located at the top of the longitudinal rib plate; the auxiliary block is welded between the positioning plate of the mounting base and the trolley body plate and located on the side, away from the reinforcing block, of the foundation bolt. According to the mounting base, the positioning plate of the mounting base of the vertical speed reducer is reinforced, so that welding seams prone to frequent cracks are welded firmly and reliably, the spot inspection and maintenance workload of maintenance personnel is reduced, safe operation of the vertical speed reducer is guaranteed, and smooth production is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment installation, and relates to crack prevention of a reducer installation base weld, and specifically is a crack prevention method for a vertical reducer installation base weld of a crane. Background Art

[0002] When smelting metals, steel mills need to use large-tonnage casting cranes to cooperate with steelmaking production online, load steel onto the ladle turret of the continuous casting machine, and lift or transfer steel raw materials and ladles.

[0003] Large-tonnage casting cranes usually have two sets of main trolley running mechanisms. Each set of running mechanisms consists of an electric motor, a vertical reducer, a wheel set and a coupling. The vertical reducer is welded to the main trolley body steel plate through the mounting base. Due to the asynchronous operation of the two sets of running mechanisms of the main trolley, the vibration caused by the high-speed operation of the vertical reducer input shaft, and the creep fatigue of the steel plate of the reducer mounting base, it is easy to cause frequent cracks at the weld between the top of the longitudinal rib plate of the vertical reducer mounting base and the main trolley body steel plate. Figure 1 and Figure 2 As shown; this is not conducive to the safe operation of the main trolley reducer, and will also increase the workload of inspection and maintenance personnel, affecting the normal production. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preventing cracks in the weld of a vertical reducer mounting base, thereby ensuring that the weld of the reducer mounting base is firm and reliable, ensuring the safe operation of the vertical reducer, and reducing the inspection and maintenance workload of maintenance personnel.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: A method for preventing cracks in a weld of a vertical reducer mounting base of a crane, comprising: Weld reinforcement blocks and auxiliary blocks between the vertical reducer mounting base and the crane trolley body steel plate; The mounting base is welded by a positioning plate, a first longitudinal rib plate, a second longitudinal rib plate and a plurality of transverse rib plates, the vertical reducer is fixed to the positioning plate of the mounting base by a plurality of anchor bolts, and the trolley body steel plate is welded to the first longitudinal rib plate, the second longitudinal rib plate and a plurality of transverse rib plates of the mounting base; The reinforcing block includes a first reinforcing block and a second reinforcing block. The first reinforcing block is welded between the positioning plate of the mounting base and the steel plate of the trolley body and is located on the top of the first longitudinal rib plate; the second reinforcing block is welded between the positioning plate of the mounting base and the steel plate of the trolley body and is located on the top of the second longitudinal rib plate; the auxiliary block includes a first auxiliary block and a second auxiliary block. The first auxiliary block is welded between the positioning plate of the mounting base and the steel plate of the trolley body and is located on the side of the first anchor bolt away from the first reinforcing block, and the second auxiliary block is welded between the positioning plate of the mounting base and the steel plate of the trolley body and is located on the side of the second anchor bolt away from the second reinforcing block.

[0006] Furthermore, the first reinforcement block and the second reinforcement block are rectangular parallelepipeds, and the first reinforcement block and the second reinforcement block are symmetrically arranged relative to the positioning plate of the mounting base, and the first reinforcement block and the second reinforcement block extend out of the edge of the positioning plate by 10 mm.

[0007] Furthermore, the first auxiliary block and the second auxiliary block are rectangular parallelepipeds, and the first auxiliary block and the second auxiliary block are symmetrically arranged relative to the positioning plate of the mounting base, and the first auxiliary block and the second auxiliary block extend 10 mm beyond the edge of the positioning plate.

[0008] Furthermore, the edges of the first reinforcement block and the second reinforcement block close to the longitudinal rib plate are processed with 10mm*45° chamfers. Before welding, the 10mm*45° chamfered sides of the first reinforcement block and the second reinforcement block should be perpendicular to the first longitudinal rib plate and the second longitudinal rib plate respectively and fit with the first longitudinal rib plate and the second longitudinal rib plate.

[0009] Furthermore, the edges of the first auxiliary block and the second auxiliary block close to the longitudinal rib plate are processed with 10mm*45° chamfers. Before welding, the 10mm*45° chamfered sides of the first auxiliary block and the second auxiliary block should be perpendicular to the first longitudinal rib plate and the second longitudinal rib plate respectively and fit with the first longitudinal rib plate and the second longitudinal rib plate.

[0010] The beneficial effects of the present invention are as follows: by welding a reinforcing block and an auxiliary block between the positioning plate of the vertical reducer mounting base and the main trolley body steel plate, it is ensured that the welds that are prone to cracks are firm and reliable after welding, the inspection and maintenance workload of maintenance personnel is reduced, the safe operation of the vertical reducer is guaranteed, and the smooth production is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the front view of the vertical reducer mounting base; Figure 2 It is a side view of the mounting base of the vertical reducer; Figure 3 It is a structural connection front view of the method of the present invention; Figure 4 is a side view of the structural connection of the method of the present invention; Figure 5It is a three-view drawing of the reinforcement block in the present invention; Figure 6 It is a three-view drawing of the auxiliary block in the present invention; In the figure, 1, vertical reducer; 2, mounting base; 201, first longitudinal rib plate; 202, second longitudinal rib plate; 203, positioning plate; 3, trolley body steel plate; 4, first reinforcement block; 5, second reinforcement block; 6, first auxiliary block; 7, second auxiliary block; 8, first anchor bolt; 9, second anchor bolt; 10, reinforcement block chamfer; 11, auxiliary block chamfer; B1, weld crack one; B2, weld crack two. DETAILED DESCRIPTION

[0012] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings 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 belong to the scope of protection of the present invention.

[0013] like Figure 1 and Figure 2 As shown, the mounting base 2 of the vertical reducer 1 is welded by a first longitudinal rib plate 201, a second longitudinal rib plate 202, a positioning plate 203 and a plurality of transverse rib plates, the vertical reducer 1 is fixed to the positioning plate 203 of the mounting base 2 by a plurality of anchor bolts, and the trolley body steel plate 3 is welded to the first longitudinal rib plate 201, the second longitudinal rib plate 202 and a plurality of transverse rib plates of the mounting base 2; the welds between the tops of the first longitudinal rib plate 201 and the second longitudinal rib plate 202 of the mounting base 2 of the vertical reducer 1 and the trolley body steel plate 3 are prone to frequent cracking, and weld crack 1 B1 and weld crack 2 B2 appear.

[0014] A method for preventing cracks in the weld of a vertical reducer installation base of a crane, such as Figure 3 and Figure 4 As shown, including: Welding a reinforcement block and an auxiliary block between the mounting base 2 of the vertical reducer 1 and the trolley body steel plate 3 of the crane; The reinforcement block includes a first reinforcement block 4 and a second reinforcement block 5. The first reinforcement block 4 is welded between the positioning plate 203 of the mounting base 2 and the trolley body plate 3 and is located on the top of the first longitudinal rib plate 201; the second reinforcement block 5 is welded between the positioning plate 203 of the mounting base 2 and the trolley body plate 3 and is located on the top of the second longitudinal rib plate 202; the auxiliary block is as follows Figure 6As shown, the auxiliary block includes a first auxiliary block 6 and a second auxiliary block 7. The first auxiliary block 6 is welded between the positioning plate 203 of the mounting base 2 and the trolley body plate 3, and is located on the side of the first anchor bolt 8 away from the first reinforcement block 4. The second auxiliary block 7 is welded between the positioning plate 203 of the mounting base 2 and the trolley body plate 3, and is located on the side of the second anchor bolt 9 away from the second reinforcement block 5.

[0015] like Figure 5 As shown, the reinforcing block is a rectangular parallelepiped, and a 10mm*45° reinforcing block chamfer 10 is processed on the corner of the reinforcing block near the longitudinal rib plate. The first reinforcing block 4 and the second reinforcing block 5 are symmetrically arranged relative to the positioning plate 203 of the mounting base 2. One side of the 10mm*45° reinforcing block chamfer 10 should be installed vertically to the longitudinal rib plate and the longitudinal rib plate to eliminate the influence of the weld between the trolley body steel plate and the longitudinal rib plate, and the weld between the longitudinal rib plate and the positioning plate of the mounting base. The size of the first reinforcing block 4 and the second reinforcing block 5 needs to ensure that the top and side of the first reinforcing block 4 and the second reinforcing block 5 can extend 10mm from the edge of the positioning plate 203 before installation and welding, so as to facilitate welding.

[0016] like Figure 6 As shown, the auxiliary block is a rectangular parallelepiped, and a 10mm*45° auxiliary block chamfer 11 is processed on the corner of the auxiliary block close to the longitudinal rib plate; the first auxiliary block 6 and the second auxiliary block 7 are symmetrically arranged relative to the positioning plate 203 of the mounting base 2, and the 10mm*45° auxiliary block chamfer 11 should be installed vertically to the longitudinal rib plate and the longitudinal rib plate to eliminate the influence of the weld between the trolley body plate and the longitudinal rib plate, and the weld between the longitudinal rib plate and the positioning plate of the mounting base. The size of the first auxiliary block 6 and the second auxiliary block 7 needs to ensure that the sides of the first auxiliary block 6 and the second auxiliary block 7 can extend 10mm from the edge of the positioning plate 203 before installation and welding, so as to facilitate welding.

[0017] By welding reinforcing blocks and auxiliary blocks at the crack-prone welds between the longitudinal ribs of the mounting base 2 of the vertical reducer 1 and the trolley body steel plate 3, the positioning plate 203 of the mounting base 2 of the vertical reducer 1 is reinforced to protect the welds that are prone to frequent cracks and make them firm and reliable, thereby reducing the workload of maintenance personnel for inspection and maintenance, ensuring the safe operation of the vertical reducer and ensuring smooth production.

[0018] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for preventing cracks in the weld of a vertical reducer mounting base of a crane, characterized in that: include: Weld reinforcement blocks and auxiliary blocks between the mounting base of the vertical reducer and the steel plate of the crane's trolley body; The mounting base is welded by a positioning plate, a first longitudinal rib plate, a second longitudinal rib plate and a plurality of transverse rib plates, the vertical reducer is fixed to the positioning plate of the mounting base by a plurality of anchor bolts, and the trolley body steel plate is welded to the first longitudinal rib plate, the second longitudinal rib plate and a plurality of transverse rib plates of the mounting base; The reinforcing block includes a first reinforcing block and a second reinforcing block, the first reinforcing block is welded between the positioning plate of the mounting base and the trolley body plate, and is located on the top of the first longitudinal rib plate; the second reinforcing block is welded between the positioning plate of the mounting base and the trolley body plate, and is located on the top of the second longitudinal rib plate; the auxiliary block includes a first auxiliary block and a second auxiliary block, the first auxiliary block is welded between the positioning plate of the mounting base and the trolley body plate, and is located on the side of the first anchor bolt away from the first reinforcing block, and the second auxiliary block is welded between the positioning plate of the mounting base and the trolley body plate, and is located on the side of the second anchor bolt away from the second reinforcing block.

2. The method for preventing cracking of the weld of the vertical reducer mounting base of a crane according to claim 1 is characterized in that: The first reinforcement block and the second reinforcement block are rectangular parallelepipeds, and are symmetrically arranged relative to the positioning plate of the mounting base. The first reinforcement block and the second reinforcement block extend out of the top and side edges of the positioning plate by 10 mm.

3. The method for preventing cracking of the weld of the vertical reducer mounting base of a crane according to claim 1 is characterized in that: The first auxiliary block and the second auxiliary block are rectangular parallelepipeds, and are symmetrically arranged relative to the positioning plate of the mounting base. The first auxiliary block and the second auxiliary block extend out of the edge of the positioning plate by 10 mm.

4. The method for preventing cracking of the weld of the vertical reducer mounting base of a crane according to claim 1 is characterized in that: The first reinforcement block and the second reinforcement block have 10mm*45° chamfered edges and corners on one side close to the longitudinal rib plate; before welding, the 10mm*45° chamfered sides of the first reinforcement block and the second reinforcement block should be perpendicular to the first longitudinal rib plate and the second longitudinal rib plate respectively and fit with the first longitudinal rib plate and the second longitudinal rib plate.

5. The method for preventing cracks in the weld of the vertical reducer mounting base of a crane according to claim 1, characterized in that: The edges of the first auxiliary block and the second auxiliary block close to the longitudinal rib plate are processed with 10mm*45° chamfers; before welding, the 10mm*45° chamfered sides of the first auxiliary block and the second auxiliary block should be perpendicular to the first longitudinal rib plate and the second longitudinal rib plate respectively and fit with the first longitudinal rib plate and the second longitudinal rib plate.

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