Bridge crane end beam welding seam cracking repairing structure

Abstract

The utility model discloses a bridge crane end beam weld joint cracking repairing structure, which relates to the technical field of hoisting machinery and comprises an end beam, a weld joint is arranged on the end beam, a welding rod is welded in the weld joint, and a support plate is fixedly mounted at the bottom of the end beam and corresponds to the welding rod. A plurality of pairs of transverse reinforcing rib plates are fixedly and symmetrically installed on the two sides of the supporting plate, the transverse reinforcing rib plates are symmetrically distributed on the two sides of the supporting plate at equal intervals, a pair of longitudinal reinforcing rib plates are symmetrically and fixedly installed on the two sides of the supporting plate, and a pair of transverse limiting plates are installed on the longitudinal reinforcing rib plates. A transverse limiting plate is fixedly installed on the end beam, a protruding block is fixedly installed on the transverse limiting plate, two pairs of fixing blocks are fixedly installed on the end beam, the fixing blocks are fixedly connected with the transverse limiting plate, and the problems that in the prior art, when a welding seam of the end beam of the bridge crane cracks, the whole end beam needs to be replaced or large-area repair welding needs to be conducted, and consequently the repair cost is high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting machinery, in particular to a bridge crane end beam weld crack repair structure. Background Art

[0002] A bridge crane is a type of lifting equipment that is horizontally mounted above workshops, warehouses, and material yards to lift materials. It is also known as an overhead crane. The double-beam bridge crane being repaired is equipped with a main hook (maximum lifting load of 120t) and an auxiliary hook (maximum lifting load of 50t), which is specially used to lift ladles of molten steel. Due to the heavy load, the unevenness of the rail guide, the large torque during travel, and the long-term alternating load, the vertical weld connecting the middle short beam of the end beam to the main beam cracked after running for a period of time. In order to avoid repeated cracking of the end beam, traditional repair methods often require replacement of the entire end beam or large-scale repair welding, which not only has high repair costs, but also a long repair cycle, affecting production progress. A new welding structure is now used to repair cracks in the end beam welds. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a bridge crane end beam weld crack repair structure, which solves the problem that the crack of the bridge crane end beam weld needs to be replaced with the entire end beam or a large area of ​​welding, resulting in high repair costs.

[0004] To achieve the above-mentioned purpose, the utility model proposes a bridge crane end beam weld crack repair structure, including an end beam, a weld seam is opened on the end beam, a welding rod is welded in the weld seam, a support plate is fixedly installed at a position corresponding to the welding rod at the bottom of the end beam, a plurality of pairs of transverse reinforcing ribs are fixedly and symmetrically installed on both sides of the support plate, the transverse reinforcing ribs are symmetrically and equidistantly distributed on both sides of the support plate, a pair of longitudinal reinforcing ribs are symmetrically fixedly installed on both sides of the support plate, a pair of connecting grooves are opened on the side of the longitudinal reinforcing ribs contacting with the transverse reinforcing ribs, a pair of return grooves are opened on the side of the longitudinal reinforcing ribs away from the end beam, a pair of transverse limiting plates are installed on the longitudinal reinforcing ribs, a protrusion is fixedly installed on the transverse limiting plates, two pairs of fixing blocks are fixedly installed on the end beam, and the fixing blocks are fixedly connected to the transverse limiting plates.

[0005] As a further solution of the utility model: the weld is an old weld that is cleaned by carbon arc gouging and opened into a 64-degree V-shaped groove.

[0006] As a further solution of the utility model: the transverse reinforcing rib plate is in the form of a right-angled triangle.

[0007] As a further solution of the utility model: one right-angle side of the transverse reinforcing rib plate is fixedly connected to the end beam, and the other right-angle side is fixedly connected to the support plate.

[0008] As a further solution of the utility model: the longitudinal reinforcing rib plate is installed on both sides of the transverse reinforcing rib plate.

[0009] As a further solution of the utility model: the connecting groove matches the transverse reinforcing rib plate, and the protrusion matches the return groove.

[0010] As a further solution of the utility model: threaded holes are provided at both ends of the transverse limiting plate, and threaded holes consistent with those on the transverse limiting plate are provided on the fixing block. Bolts are provided on the threaded holes, and the transverse limiting plate is fixedly connected to the end beam by tightening the bolts.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The weld is cleaned by carbon arc gouging to form a 64-degree V-shaped groove, and then the J507RH electrode is used to fill the groove, which reduces welding cracks and increases the stability of the weld.

[0013] 2. By setting a support plate, and setting several pairs of transverse reinforcing ribs in the shape of a right triangle around the support plate, and fixing the longitudinal reinforcing ribs on both sides of the transverse reinforcing ribs, a plurality of connecting grooves corresponding to the transverse reinforcing ribs are opened in the longitudinal reinforcing ribs, and the longitudinal reinforcing ribs are stably abutted against the transverse reinforcing ribs through the connecting grooves, so as to effectively improve the stress distribution in the welding area, disperse the stress to a larger area, and reduce the risk of weld cracking. Setting it into a triangle can increase the stability of the structure, prevent the deformation and vibration of the weld, increase the rigidity and lateral displacement resistance of the structure, and keep the end beam stable when subjected to load; the stable abutment between the longitudinal reinforcing ribs and the transverse reinforcing ribs through the connecting grooves can facilitate the replacement of various parts and reduce the overall repair cost of the structure.

[0014] 3. By setting a fixed block, a return groove, a transverse limit plate and bolts, by setting a return groove on the longitudinal reinforcing rib plate, a protrusion is fixedly installed on the transverse limit plate, and the contact area between the transverse limit plate and the longitudinal reinforcing rib plate is increased by matching the protrusion with the return groove, thereby increasing the stability of the connection, and the transverse limit plate is fixedly connected to the end beam by bolts, which increases the overall stability of the device and facilitates the disassembly and replacement of some structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional structural diagram of a bridge crane end beam weld crack repair structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure after the old weld is planed of a cracked weld repair structure of a bridge crane end beam according to the utility model;

[0017] Figure 3 This is an isometric test diagram of a bridge crane end beam weld crack repair structure of the utility model;

[0018] Figure 4 The utility model is an explosion schematic diagram of a bridge crane end beam weld crack repair structure.

[0019] In the figure: 1. end beam; 2. welding rod; 3. transverse reinforcing rib plate; 4. longitudinal reinforcing rib plate; 5. support plate; 6. transverse limit plate; 7. welding seam; 8. bolt; 9. fixing block; 10. return groove; 11. connecting groove; 12. protrusion. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-4As shown, a bridge crane end beam weld crack repair structure comprises an end beam 1, a weld 7 is opened on the end beam 1, the weld 7 is an old weld that has been cleaned by carbon arc air planing and opened into a 64-degree V-shaped groove, a welding rod 2 is welded in the weld 7, a support plate 5 is fixedly installed at the bottom of the end beam 1 at a position corresponding to the welding rod 2, and a plurality of pairs of transverse reinforcing rib plates 3 are fixedly and symmetrically installed on both sides of the support plate 5, the transverse reinforcing rib plates 3 are in the shape of a right triangle, and the purpose of setting the transverse reinforcing rib plates 3 is to effectively improve the stress distribution in the welding area, disperse the stress to a larger area, and reduce the welding The risk of cracking of the weld 7 is reduced, and setting it into a triangle can increase the stability of the structure, prevent deformation and vibration of the weld 7, increase the rigidity and lateral displacement resistance of the structure, and keep the end beam 1 stable when subjected to load; one right-angle side of the transverse reinforcing rib plate 3 is fixedly connected to the end beam 1, and the other right-angle side is fixedly connected to the support plate 5, the transverse reinforcing rib plates 3 are symmetrically and equidistantly distributed on both sides of the support plate 5, and a pair of longitudinal reinforcing rib plates 4 are symmetrically fixedly installed on both sides of the support plate 5, the longitudinal reinforcing rib plates 4 are installed on both sides of the transverse reinforcing rib plates 3, and the longitudinal reinforcing rib plates 4 are connected to the transverse reinforcing rib plates 3 A plurality of pairs of connecting grooves 11 are provided on the contact side, and the connecting grooves 11 match the transverse reinforcing ribs 3. The purpose of setting the connecting grooves 11 is to fit with the transverse reinforcing ribs 3 so that the transverse reinforcing ribs 3 are connected with the longitudinal reinforcing ribs 4, and the load of the structure can be jointly borne, and the overall rigidity and strength of the structure can be improved. At the same time, they can be replaced separately to save installation materials; a pair of return grooves 10 are provided on the side of the longitudinal reinforcing ribs 4 away from the end beam 1, and a pair of transverse limiting plates 6 are installed on the longitudinal reinforcing ribs 4, and a protrusion 12 is fixedly installed on the transverse limiting plates 6, and the protrusion 12 is connected to the return groove 1 0 matching, the purpose of setting the return groove 10 is to increase the contact area between the transverse limit plate 6 and the longitudinal reinforcing rib plate 4, increase the stability of the connection, and enable the transverse limit plate 6 to better provide support and stability for the longitudinal reinforcing rib plate 4. Threaded holes are provided at both ends of the transverse limit plate 6, and two pairs of fixing blocks 9 are fixedly installed on the end beam 1. The fixing blocks 9 are provided with threaded holes consistent with those on the transverse limit plate 6, and bolts 8 are provided on the threaded holes. By tightening the bolts 8, the transverse limit plate 6 is fixedly connected to the end beam 1, which increases the overall stability of the device and facilitates the disassembly and replacement of some structures.

[0022] Working principle:

[0023] The old weld is cleaned by carbon arc gouging to form a weld 7 with a 64-degree V-shaped groove. The weld 7 is polished to reveal its metallic luster. The weld 7 is filled with welding rod 2 of specification J507RH. The welding rod 2 is baked at 350-400℃ for 2h and placed in an insulation barrel for use. A support plate 5 is fixedly installed at the bottom of the end beam 1 corresponding to the welding rod 2. A plurality of pairs of transverse reinforcing ribs 3 are fixedly and symmetrically installed on both sides of the support plate 5 to improve the stress distribution in the welding area and prevent the deformation and vibration of the weld 7. A pair of longitudinal reinforcing ribs 4 are fixedly installed on both sides of a pair of transverse reinforcing ribs 3. A connecting groove 11 is provided in the longitudinal reinforcing ribs 4. The transverse reinforcing ribs 3 are mutually abutted with the longitudinal reinforcing ribs 4 through the connecting groove 11 to jointly bear the load of the structure and can be replaced separately. A pair of transverse limit plates 6 are installed on the longitudinal reinforcing ribs 4. Two pairs of fixing blocks 9 are fixedly installed on the end beam 1. The transverse limit plates 6 are fixedly connected to the fixing blocks 9 by bolts.

[0024] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A bridge crane end beam weld crack repair structure, characterized in that: The invention comprises an end beam (1), wherein a welding seam (7) is formed on the end beam (1), a welding rod (2) is welded in the welding seam (7), a support plate (5) is fixedly installed at a position corresponding to the welding rod (2) at the bottom of the end beam (1), a plurality of pairs of transverse reinforcing rib plates (3) are fixedly installed symmetrically on both sides of the support plate (5), the transverse reinforcing rib plates (3) are symmetrically and equidistantly distributed on both sides of the support plate (5), a pair of longitudinal reinforcing rib plates (4) are symmetrically installed on both sides of the support plate (5), and the longitudinal reinforcing rib plates (4) are fixedly installed A plurality of pairs of connection grooves (11) are provided on the side of the reinforcing rib plate (4) in contact with the transverse reinforcing rib plate (3), a pair of return grooves (10) are provided on the side of the longitudinal reinforcing rib plate (4) away from the end beam (1), a pair of transverse limit plates (6) are installed on the longitudinal reinforcing rib plate (4), a protrusion (12) is fixedly installed on the transverse limit plate (6), and two pairs of fixed blocks (9) are fixedly installed on the end beam (1), and the fixed blocks are fixedly connected to the transverse limit plates (6).

2. The bridge crane end beam weld crack repair structure according to claim 1, characterized in that: The weld (7) is an old weld that has been cleaned by carbon arc gouging and opened into a 64-degree V-shaped groove.

3. The bridge crane end beam weld crack repair structure according to claim 1, characterized in that: The transverse reinforcing rib plate (3) is in the form of a right triangle.

4. The bridge crane end beam weld crack repair structure according to claim 3, characterized in that: One right-angled side of the transverse reinforcing rib plate (3) is fixedly connected to the end beam (1), and the other right-angled side is fixedly connected to the support plate (5).

5. The bridge crane end beam weld crack repair structure according to claim 1, characterized in that: The longitudinal reinforcing rib plates (4) are installed on both sides of the transverse reinforcing rib plates (3).

6. The bridge crane end beam weld crack repair structure according to claim 1, characterized in that: The connecting groove (11) matches the transverse reinforcing rib plate (3), and the protrusion (12) matches the return groove (10).

7. The bridge crane end beam weld crack repair structure according to claim 1, characterized in that: The transverse limiting plate (6) has threaded holes at both ends, the fixing block (9) has threaded holes that are consistent with those on the transverse limiting plate (6), and bolts (8) are arranged on the threaded holes. By tightening the bolts (8), the transverse limiting plate (6) is fixedly connected to the end beam (1).

Images