Welding reinforcing device for large structural part buggy ladle frame

Abstract

The utility model discloses a welding reinforcing device for a buggy ladle frame of a large structural member, which comprises a cover plate and supporting vertical plates, the supporting vertical plates are fixedly connected with a first structural surface and a second structural surface, a plurality of the supporting vertical plates are linearly arranged along a horizontal line, the cover plate is arranged between the adjacent supporting vertical plates, and the cover plate is fixedly connected with the first structural surface and the second structural surface. The cover plate is fixedly connected with the two corresponding supporting vertical plates, and the cover plate is attached and fixed to the first structural surface; according to the buggy ladle frame, the structural surfaces on the two sides of the R-angle section are welded and fixed through the supporting vertical plates, so that the structural strength of the two sides of a crack is enhanced, and after the R-angle section is welded and repaired, the corresponding structural strength of the repaired buggy ladle frame can be improved, so that the service life is prolonged, and the service life of the buggy ladle frame is prolonged. And the conditions of resource waste caused by replacement of the lifting arm and short service life caused by only welding crack repair are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of large equipment repair, in particular to a welding reinforcement device for a large structural member ladle car frame. Background Art

[0002] The ladle car device for large structural parts is often used in converter and large structural parts refining projects. The ladle car will cause cracks on the R corner due to long-term load use, and the cracks will continue to expand with the use time, making it impossible for the ladle car to operate normally.

[0003] The existing repair method generally adopts on-site crack welding repair. Although the repair weld can be guaranteed to be defect-free when the crack is repaired by welding, the post-weld heat treatment can reduce stress concentration, and the drawing size and precision size can be restored by online manual grinding, and the product can be delivered to production in time, but for the cracks at the R corner of the large structural component ladle car frame, after welding repair, various mechanical properties cannot meet the long-term use requirements of the lifting arm translation and lifting due to the influence of welding repair. In order to meet long-term use, it is generally necessary to replace the ladle car frame, but the ladle car frame is large in size, and there are certain difficulties in disassembly, lifting and transportation. In addition, the replacement of local components is not suitable for the assembly of new and old equipment, which is also easy to waste a lot of procurement costs.

[0004] In view of the above-mentioned defects, the inventor of the present invention finally obtained the present invention after a long period of research and practice. Utility Model Content

[0005] In order to solve the above technical defects, the technical solution adopted by the utility model is to provide a welding reinforcement device for a large structural member ladle car frame, the ladle car frame includes a first structural surface and a second structural surface, the first structural surface and the second structural surface are transitioned through an R angle segment arc to be repaired;

[0006] The welding reinforcement device of the large structural component ladle car frame includes a cover plate and a supporting upright plate, the supporting upright plate is fixedly connected to the first structural surface and the second structural surface, a plurality of the supporting upright plates are arranged in a straight line along a horizontal line, the cover plate is arranged between adjacent supporting upright plates, and the cover plate is fixedly connected to the corresponding two supporting upright plates, and the cover plate is fitted and fixed to the first structural surface.

[0007] Preferably, the supporting upright plate is configured as a right-angle trapezoidal plate, and the edge of the supporting upright plate is provided with a short straight side, a long straight side, a straight waist side and an oblique waist side, the short straight side and the long straight side are arranged in parallel, the straight waist side is arranged perpendicular to the short straight side and the long straight side, the oblique waist side is fitted and fixed to the second structural surface, and the short straight side is fitted and fixed to the first structural surface.

[0008] Preferably, the cover plate is configured as a rectangular plate, and the edges of the cover plate are configured as two parallel first cover plate edges and two parallel second cover plate edges, one of the first cover plate edges is fit and fixedly connected to the first structural surface, and two of the second cover plate edges are respectively fit and fixedly connected to the corresponding two supporting vertical plates.

[0009] Preferably, the length of the first cover plate edge is greater than that of the second cover plate edge.

[0010] Preferably, an avoidance groove is provided at the connection between the short straight side and the long straight side, and the avoidance groove is provided corresponding to the R angle segment.

[0011] Preferably, the first cover plate edge is fixedly connected to the first structural surface by a first weld, the oblique waist edge and the second structural surface are fixedly connected by a second weld and a third weld, the short straight edge and the first structural surface are fixedly connected by a fourth weld and a fifth weld, the second cover plate edge and the corresponding supporting vertical plate are fixedly connected by a sixth weld, the second weld and the third weld are respectively arranged on both sides of the corresponding supporting vertical plate, and the fourth weld and the fifth weld are respectively arranged on both sides of the corresponding supporting vertical plate.

[0012] Preferably, each of the cover plates corresponding to the same R-angle segment is arranged on the same plane, and the straight waist edge of the supporting vertical plate is welded and fixed to the second cover plate edge of the corresponding cover plate.

[0013] Preferably, corresponding to the first weld, a first welding groove is provided on the edge of the first cover plate, and corresponding to the sixth weld, a second welding groove is provided on the edge of the second cover plate.

[0014] Preferably, the cover plate is formed by processing with a 25 mm steel plate, and the support vertical plate is formed by processing with a 35 mm steel plate.

[0015] Compared with the prior art, the beneficial effect of the utility model is that the utility model welds and fixes the structural surfaces on both sides of the R-angle segment by arranging a plurality of the supporting vertical plates, thereby strengthening the structural strength on both sides of the crack. After the R-angle segment is welded and repaired, the corresponding structural strength of the repaired ladle car frame can be improved to increase the service life, thereby avoiding the waste of resources caused by the replacement of the lifting arm and the low service life caused by only welding the crack repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the welding reinforcement device for the large structural member ladle car frame;

[0017] Figure 2 It is a view of the installation structure of the welding reinforcement device of the large structural member ladle car frame;

[0018] Figure 3 It is a structural front view of the welding reinforcement device of the large structural member ladle car frame;

[0019] Figure 4 It is a three-dimensional structural view of the welding reinforcement device of the large structural component ladle car frame.

[0020] The numbers in the figure represent:

[0021] 1- ladle car frame; 2- cover plate; 3- supporting vertical plate; 11- first structural surface; 12- second structural surface; 13- R angle segment; 21- first cover plate edge; 22- second cover plate edge; 23- first weld; 24- sixth weld; 31- short straight edge; 32- long straight edge; 33- straight waist edge; 34- inclined waist edge; 35- second weld; 36- third weld; 37- fourth weld; 38- fifth weld. DETAILED DESCRIPTION

[0022] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] The ladle car frame 1 includes a first structural surface 11 and a second structural surface 12, wherein the first structural surface 11 and the second structural surface 12 are transitioned by an arc through an R-angle segment 13, and the R-angle segment 13 is a crack-prone segment of the ladle car frame 1. When performing welding crack repair, the ladle car frame 1 is generally placed horizontally, at which time the first structural surface 11 is horizontally arranged, and the second structural surface 12 is tilted downward in a direction away from the first structural surface 11.

[0025] like Figures 1 to 4 As shown, Figure 1 It is a schematic diagram of the structure of the welding reinforcement device for the large structural member ladle car frame; Figure 2 It is a view of the installation structure of the welding reinforcement device of the large structural member ladle car frame; Figure 3 It is a structural front view of the welding reinforcement device of the large structural member ladle car frame; Figure 4 It is a three-dimensional structural view of the welding reinforcement device of the large structural component ladle car frame.

[0026] The welding reinforcement device of the large structural member ladle car frame of the utility model includes a cover plate 2 and a supporting upright plate 3, the supporting upright plate 3 is fixedly connected to the first structural surface 11 and the second structural surface 12, a plurality of the supporting upright plates 3 are arranged in a straight line along a horizontal line, the cover plate 2 is arranged between adjacent supporting upright plates 3, and the cover plate 2 is fixedly connected to the corresponding two supporting upright plates 3, the cover plate 2 is fitted and fixed to the first structural surface 11, thereby enhancing the stability of the relative position between the first structural surface 11 and the second structural surface 12.

[0027] Preferably, the supporting upright plate 3 is configured as a right-angle trapezoidal plate, and the edge of the supporting upright plate 3 is provided with a short straight side 31, a long straight side 32, a straight waist side 33 and an oblique waist side 34, the short straight side 31 and the long straight side 32 are arranged in parallel, the straight waist side 33 and the short straight side 31 and the long straight side 32 are arranged perpendicularly, the oblique waist side 34 is fitted and fixed to the second structural surface 12, and the short straight side 31 is fitted and fixed to the first structural surface 11, so as to form a stable supporting structure.

[0028] Preferably, the cover plate 2 is configured as a rectangular plate, and the edges of the cover plate 2 are configured as two parallel first cover plate edges 21 and two parallel second cover plate edges 22, one of the first cover plate edges 21 is fitted and fixedly connected to the first structural surface 11, and the two second cover plate edges 22 are respectively fitted and fixedly connected to the corresponding two support vertical plates 3, thereby stabilizing the structural state of the adjacent support vertical plates 3 and improving the overall structural strength of the welding reinforcement device. The cover plate 2 and the corresponding two support vertical plates 3 are both vertically arranged.

[0029] Generally, the length of the first cover plate edge 21 is greater than that of the second cover plate edge 22 , ensuring that a suitable number of the supporting vertical plates 3 are provided on the same R-angle segment 13 , thereby supporting and fixing the first structural surface 11 and the second structural surface 12 .

[0030] Preferably, an avoidance groove is provided at the connection between the short straight side 31 and the long straight side 32 , and the avoidance groove is provided corresponding to the R-angle segment 13 to avoid interference between the supporting vertical plate 3 and the R-angle segment 13 when the supporting vertical plate 3 is welded and fixed.

[0031] The first cover plate edge 21 is fixedly connected to the first structural surface 11 through the first weld 23, the oblique waist edge 34 and the second structural surface 12 are fixedly connected through the second weld 35 and the third weld 36, the short straight edge 31 and the first structural surface 11 are fixedly connected through the fourth weld 37 and the fifth weld 38, the second cover plate edge 22 and the corresponding supporting vertical plate 3 are fixedly connected through the sixth weld 24, the second weld 35 and the third weld 36 are respectively arranged on both sides of the corresponding supporting vertical plate 3, and the fourth weld 37 and the fifth weld 38 are respectively arranged on both sides of the corresponding supporting vertical plate 3, so as to ensure the stability of the structural state of the welding reinforcement device as a whole and between it and the ladle car frame 1.

[0032] Preferably, each of the cover plates 2 corresponding to the same R-angle segment 13 is arranged on the same plane, and the straight waist edge 33 of the supporting vertical plate 3 is welded and fixed to the second cover plate edge 22 of the corresponding cover plate 2, so as to minimize the design area of ​​the supporting vertical plate 3 and avoid the influence of the welding reinforcement device on the overall weight of the ladle car frame 1.

[0033] Corresponding to the first weld 23, a first welding groove is provided on the first cover plate edge 21, and corresponding to the sixth weld 24, a second welding groove is provided on the second cover plate edge 22. The first cover plate edge 21 and the first structural surface 11, the second cover plate edge 22 and the corresponding supporting vertical plate 3 are fixed by single-sided welding. Providing a welding groove can increase the welding area, thereby improving the welding strength.

[0034] Generally, the cover plate 2 is formed by processing with a 25 mm steel plate, and the support vertical plate 3 is formed by processing with a 35 mm steel plate to ensure structural strength.

[0035] The utility model arranges a plurality of the supporting upright plates 3 to weld and fix the structural surfaces on both sides of the R-angle section 13, thereby strengthening the structural strength on both sides of the crack. After the R-angle section 13 is repaired by welding, the corresponding structural strength of the repaired ladle car frame 1 can be improved to increase the service life, thereby avoiding the waste of resources caused by the replacement of the lifting arm and the short service life caused by only welding the crack repair.

[0036] Embodiment 2

[0037] The specific process of welding reinforcement using the welding reinforcement device for the large structural member ladle car frame is as follows:

[0038] Preparation before welding:

[0039] The welding equipment is a HT400D digitally controlled inverter manual DC welding machine. The welding rods used are φ4.0mmE5015 and φ5.0mmE5015. The welding rods are baked at 350℃ for 2h and then kept at a constant temperature and placed in a heat preservation bucket for use.

[0040] Preparation of groove: Use carbon arc gouging ZX5-630 welding machine in combination with plasma gouging LGK-100MA.

[0041] Heating equipment: ZWK-180KW electric heating equipment or oxygen·acetylene.

[0042] Welding position: vertical welding - flat welding - elevated angle weld.

[0043] The welding position area and the welding rod must be free of oil, oxide layer, moisture, etc., and the metallic luster must be exposed. To remove rust, grease, and moisture, use oxyacetylene flame to remove moisture and oil, and then use emery cloth or grinding machine to grind and remove rust.

[0044] Welding technical requirements: The single-sided fillet weld cladding layer fuses the base material, the weld surface has no welding defects and meets the designed weld leg size.

[0045] Ladle car frame 1 and reinforcement material: Q345.

[0046] Auxiliary facilities: insulation barrel, sample, thermometer, magnifying glass, thermal insulation cotton, mask, gloves, slag cleaning hammer, hammer, chisel, file, wire brush, sandpaper, steel ruler, level, adjustable wrench, straight grinder, angle grinder, wire cutters, hacksaw blades, labor protection supplies (work clothes, shoes, hats, flat glasses).

[0047] Manual arc welding welding process parameter table

[0048]

[0049] As shown in the above table, the above table is a welding process parameter table of the first weld 23, the second weld 35, the third weld 36, the fourth weld 37, the fifth weld 38, and the sixth weld 24.

[0050] The implementation operation process route is: horizontally place the ladle car frame 1, install the supporting vertical plate 3, prepare the vertical plate groove at the second weld 35, the third weld 36, the fourth weld 37 and the fifth weld 38 and clean them, preheat the vertical plate groove, symmetrically weld the second weld 35 and the third weld 36, and then symmetrically weld the fourth weld 37 and the fifth weld 38, install the cover plate 2, prepare the cover plate 2 groove at the first weld 23 and the sixth weld 24 and clean them, preheat the cover plate 2 groove, weld and fix the sixth weld 24 and then weld and fix the first weld 23, perform surface inspection after hammering the weld, and deliver it for use after slow cooling.

[0051] The specific process is: firstly place the ladle car frame 1 horizontally, then install the support plate 3, use the carbon arc gouging ZX5-630 welding machine in conjunction with the plasma gouging LGK-100M to prepare grooves at the positions of the second weld 35, the third weld 36, the fourth weld 37 and the fifth weld 38, and evenly distribute and symmetrically spot weld them in sections, and use oxygen·acetylene to preheat the grooves at the positions of the second weld 35, the third weld 36, the fourth weld 37 and the fifth weld 38 before welding. Because the thickness of the welding plate of the box crossbeam of the support plate 3 and the ladle car frame 1 is more than 20mm~50mm, the preheating temperature is 100°~120°, so as to better reduce the local temperature difference stress, improve the internal structure, prevent or reduce the generation of hardened structure, and the preheating area can be slightly larger. Because the preheating area is large and long, a temperature measuring gun must be used to verify the temperature on both sides of the weld.

[0052] After the temperature is reached, the bottom layer welding is started by using HT400D digitally controlled inverter manual (argon arc welding machine) combined with a DC welding machine and an E5015 electrode φ4.0mm. The welding position is vertical welding-elevated angle weld and it is segmented symmetrical welding. The welding sequence is: first weld and fix the second weld 35 and the third weld 36, then weld and fix the fourth weld 37 and the fifth weld 38. The bottom layer's wire feeding method all adopts the straight wire feeding method. After the bottom layer is fully welded, the weld area is hammered, and then the weld is inspected for welding defects by visual inspection and a 5x magnifying glass. The filling layer and the cover layer are welded with E5015 welding rod φ5.0mm. The interlayer temperature is controlled to be not less than 100°~120°. The wire feeding method is all oblique triangle wire feeding method. The welding sequence is the same as the bottom layer, especially the cover layer must meet the designed fillet weld leg size, and the surface of the weld cannot have any welding defects. After all welding is completed, continue to use oxygen·acetylene to track and heat the weld area to 300°. Maintain the temperature for 2 hours continuously, then wrap it with insulation cotton and slowly cool it to room temperature. After passing UT and MT flaw detection without defects, the reinforcement welding of the cover plate 2 is carried out.

[0053] The cover plates 2 are placed in pairs, and grooves (the first welding groove and the second welding groove) are prepared at the positions of the first weld 23 and the sixth weld 24 by using a carbon arc air planer ZX5-630 welding machine in combination with a plasma air planer LGK-100M, and are evenly distributed and fixed by symmetrical spot welding in sections, and the grooves at the positions of the first weld 23 and the sixth weld 24 are preheated before welding by using oxygen·acetylene. Since the thickness of the welding plate of the cover plate 2 and the box crossbeam of the ladle car frame 1 is more than 20mm~50mm, the preheating temperature is 100°~120°, so as to better reduce the local temperature difference stress, improve the internal structure, prevent or reduce the generation of hardened structure, and the preheating area can be slightly larger. Since the preheating area is large and long, a temperature measuring gun must be used to verify the temperature on both sides of the weld.

[0054] After the temperature is reached, the HT400D digitally controlled inverter manual (argon arc welding machine) combined with the DC welding machine is used, and the E5015 electrode φ4.0mm is used to start the bottom layer welding. The welding position of the cover plate 2: vertical welding-elevated angle weld, and it is segmented symmetrical welding. The welding sequence is: first weld and fix the sixth weld 24, then weld and fix the first weld 23. The bottom layer's wire movement method is all straight line wire movement method. After the bottom layer is completely welded, the weld area is hammered, and then the weld is checked for welding defects by visual inspection and a 5x magnifying glass. The filling layer and the cover layer are welded with E5015 electrodes φ5.0mm. The interlayer temperature is controlled to be not less than 100°~120°. The wire movement method is all oblique triangle wire movement method. The welding sequence is Like the base layer, the cover layer in particular must meet the designed fillet weld leg size, and the weld surface must not have any welding defects. After all welding is completed, continue to use oxygen·acetylene to track and heat the weld area to 300° and maintain the temperature for 2 hours. Then wrap it with insulation cotton and slowly cool it to room temperature. After passing UT and MT flaw detection without defects, the welded ladle car frame 1 is inspected and accepted on site to fully meet the design and installation requirements. The reinforcement operation is completed and delivered for use. After the large-scale structural parts refining engineering ladle car operation inspection, the mechanical performance effect is achieved.

[0055] The welding reinforcement performed by the utility model is not only safe and easy to operate, but also has stable welding quality and low investment cost, meets the actual needs of the site, has high work efficiency, and greatly reduces maintenance costs and reduces losses caused by long-term downtime, thus providing a guarantee for reasonable production.

[0056] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences can be made within the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.

Claims

1. A welding reinforcement device for a large structural member ladle car frame, characterized in that: The ladle car frame comprises a first structural surface and a second structural surface, wherein the first structural surface and the second structural surface are transitioned through an R-angle segment arc to be repaired; The welding reinforcement device of the large structural member ladle car frame comprises a cover plate and a support vertical plate, the support vertical plate is fixedly connected to the first structural surface and the second structural surface, a plurality of the support vertical plates are arranged in a straight line along a horizontal line, the cover plate is arranged between adjacent support vertical plates, and the cover plate is fixedly connected to the corresponding two support vertical plates, and the cover plate is fitted and fixed to the first structural surface; The supporting upright plate is arranged as a right-angle trapezoidal plate, and the edge of the supporting upright plate is provided with a short straight side, a long straight side, a straight waist side and an oblique waist side, the short straight side and the long straight side are arranged in parallel, the straight waist side and the short straight side and the long straight side are arranged perpendicularly, the oblique waist side is fitted and fixed to the second structural surface, and the short straight side is fitted and fixed to the first structural surface; an avoidance groove is arranged at the connection between the short straight side and the long straight side, and the avoidance groove is arranged corresponding to the R angle segment.

2. The welding reinforcement device for the large structural member ladle car frame according to claim 1, characterized in that: The cover plate is configured as a rectangular plate, and the edge of the cover plate is configured as two parallel first cover plate edges and two parallel second cover plate edges, one of the first cover plate edges is fitted and fixedly connected to the first structural surface, and two of the second cover plate edges are respectively fitted and fixedly connected to the corresponding two supporting vertical plates.

3. The welding reinforcement device for the large structural member ladle car frame according to claim 2, characterized in that: The length of the first cover plate side is greater than that of the second cover plate side.

4. The welding reinforcement device for the large structural member ladle car frame according to claim 2, characterized in that: The first cover plate edge is fixedly connected to the first structural surface by a first weld, the oblique waist edge and the second structural surface are fixedly connected by a second weld and a third weld, the short straight edge and the first structural surface are fixedly connected by a fourth weld and a fifth weld, the second cover plate edge and the corresponding supporting vertical plate are fixedly connected by a sixth weld, the second weld and the third weld are respectively arranged on both sides of the corresponding supporting vertical plate, and the fourth weld and the fifth weld are respectively arranged on both sides of the corresponding supporting vertical plate.

5. The welding reinforcement device for the large structural member ladle car frame according to claim 4, characterized in that: The cover plates corresponding to the same R-angle segment are all arranged on the same plane, and the straight waist edge of the supporting vertical plate is welded and fixed to the second cover plate edge of the corresponding cover plate.

6. The welding reinforcement device for the large structural member ladle car frame according to claim 4, characterized in that: Corresponding to the first weld, a first welding groove is arranged on the edge of the first cover plate, and corresponding to the sixth weld, a second welding groove is arranged on the edge of the second cover plate.

7. The welding reinforcement device for the large structural member ladle car frame according to claim 1, characterized in that: The cover plate is formed by processing with a 25 mm steel plate.

8. The welding reinforcement device for the large structural member ladle car frame according to claim 1, characterized in that: The supporting upright plate is formed by processing with a 35 mm steel plate.

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