CN220596821U - Local additional strengthening of casting crane girder of box structure - Google Patents
Local additional strengthening of casting crane girder of box structure Download PDFInfo
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- CN220596821U CN220596821U CN202321678105.3U CN202321678105U CN220596821U CN 220596821 U CN220596821 U CN 220596821U CN 202321678105 U CN202321678105 U CN 202321678105U CN 220596821 U CN220596821 U CN 220596821U
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- 238000005266 casting Methods 0.000 title claims abstract description 24
- 238000005728 strengthening Methods 0.000 title claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 57
- 238000003466 welding Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
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Abstract
The utility model discloses a local reinforcing structure of a main girder of a box-type structural casting crane, which comprises a main web, a T-shaped steel upper flange welded at the top end of the main web, angle steel horizontally welded on the main web, and a plurality of trapezoid rib plates vertically welded between the T-shaped steel upper flange and the angle steel, and also comprises a reinforcing support plate, wherein four sides of the reinforcing support plate are respectively welded with the T-shaped steel upper flange, the angle steel and two adjacent trapezoid rib plates. The structure forms a local box structure, can obviously enhance the local strength and rigidity of the main beam under the action of wheel pressure, and effectively solves the problem of cracking of detail structures caused by insufficient local strength and rigidity of the crane. The utility model has simple structure, easy installation and good reinforcement effect, is suitable for various casting cranes, and can effectively prolong the service life.
Description
Technical Field
The utility model belongs to the technical field of main beams of casting cranes, and particularly relates to a local reinforcing structure of a main beam of a casting crane.
Background
The main girder of the casting crane is a main component for bearing the hoisting load, and is extremely easy to generate local instability and fatigue failure under the action of frequent local wheel pressure. At present, most of domestic and foreign foundry cranes are provided with a plurality of small rib plates between an upper cover plate and a main web plate so as to increase local stability, but the fatigue performance of the main beam is often obviously reduced due to the increase of the number of welding seams and the increase of the difficulty of welding implementation, and finally, fatigue cracks are densely initiated at the connecting welding seam parts of the small rib plates in the area above the main web plate of the working section of the main beam. These cracks propagate from the weld to the web parent metal, directly affecting the service performance and safety performance of the casting crane.
The concrete analysis is that the butt welding seam connection mode is adopted between the prior main beam T-shaped steel and the main web plate of the casting crane, a plurality of trapezoid rib plates and small rib plates are transversely arranged for enhancing the stability under the action of local wheel pressure, after the structure is used for a period of time, the joint welding seam between the trapezoid rib plates and the small rib plates and the main web plate of the main beam easily generates some macroscopic cracks, and obvious potential safety hazards exist.
Disclosure of Invention
The utility model aims to provide a crane girder reinforcing structure which is easy to install, safe and reliable and can obviously improve stress distribution, and solves the technical problems that a field service structure is easy to generate instability, fatigue and the like.
In order to achieve the technical purpose, the technical scheme comprises a main web, a T-shaped steel upper flange welded at the top end of the main web, angle steel horizontally welded on the main web, a plurality of trapezoid rib plates vertically welded between the T-shaped steel upper flange and the angle steel, and a reinforcing support plate, wherein four sides of the reinforcing support plate are welded with the T-shaped steel upper flange, the angle steel and two adjacent trapezoid rib plates respectively.
The reinforcing support plate 1 is rectangular, and four corners are provided with 1/4 inner circular arcs.
The four sides of the reinforcing support plate are provided with V-shaped grooves with the same size as the plate thickness.
The middle part of strengthening the backup pad evenly a plurality of round holes, the round hole has with the same size V type groove of board thickness, its groove direction with the groove direction of the four sides of strong backup pad is unanimous.
Two rows of round holes are formed in the middle of the reinforcing support plate, and each row of round holes is formed in the middle of the reinforcing support plate.
And a transverse supporting steel pipe is inserted into the round hole, and the rear end of the transverse supporting steel pipe is welded with the main web plate.
The rear end face of the transverse supporting steel pipe is provided with a V-shaped groove with the same size as the wall thickness, and the groove direction is inward.
The inner circumference of the rear end of the transverse support steel pipe is connected with the main web plate in a fillet welding mode.
The transverse supporting steel pipe is connected with the outer circumference of the transverse supporting steel pipe in a fillet weld mode at the round hole groove of the reinforcing supporting plate.
The upper edge of the reinforcing support plate is connected with the fillet weld of the lower surface of the upper flange 3 of the T-shaped steel, the lower edge of the reinforcing support plate is connected with the fillet weld of the upper surface of the angle steel, and the left and right edges of the reinforcing support plate are respectively connected with the fillet welds of the inner surfaces of the two adjacent trapezoid rib plates 4.
By adopting the technical scheme, the local reinforcing structure of the main girder of the casting crane can greatly improve the stress distribution of the main girder structure of the crane, reduce the secondary stress caused by bending, reduce the stress variation of a welding line part and improve the fatigue performance and the operation reliability of the casting crane. Therefore, the utility model has the characteristics of easy installation, good reinforcement effect, safety, reliability and the like, is suitable for various casting cranes, and can effectively prolong the service life of the casting cranes.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the shape of the plate surface of the reinforcing support plate of FIG. 1;
FIG. 3 is a schematic view of the bevel configuration of the reinforcing support plate of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the lateral support steel tube of FIG. 1;
fig. 5 is a schematic view of the peripheral weld of the reinforcing support plate.
FIG. 6 is a schematic view of the joint welds of the transverse support steel tube with the reinforcing support plates and the primary web.
Wherein, 1-backup pad, 2-horizontal support steel pipe, 3-T shaped steel top flange, 4-trapezoidal gusset, 5-angle steel, 6-main web, 7-round hole, 8-V type groove, 9-inner circular arc, 10-fillet weld.
Detailed Description
The utility model is further described below with reference to the accompanying drawings, which are given by way of illustration only and are not intended to limit the scope of the utility model.
According to the embodiment, on the basis of not changing the existing basic structural form, a box-shaped structural local reinforcing structure of the main girder of the casting crane is additionally arranged between 2 adjacent trapezoid rib plates 4 on the outer side of the main web 6. As shown in fig. 1: the structure comprises a reinforcing support plate 1 and a transverse support steel pipe 2, wherein the periphery of the reinforcing support plate 1 is respectively connected with a T-shaped steel upper flange 3, angle steel 5 and 2 adjacent trapezoid rib plates 4, so that a box structure is formed. The structure can redistribute the local wheel pressure effect, avoids the overlarge load born by the original welding line, and can obviously improve the bearing performance of the main body structure.
As a further improvement of the technical scheme, the following steps are: the four corners of the reinforcing support plate 1 are provided with 1/4 inner circular arcs 9, as shown in fig. 2, the fillet weld between the upper flange 3 of the T-shaped steel and the trapezoid rib plate 4 can be avoided, and the stress concentration degree of the intersecting weld is eliminated.
As a further improvement of the technical scheme, the following steps are: the four sides of the reinforcing support plate 1 are provided with V-shaped grooves 8 (the oblique angle is 45 degrees) which have the same size as the plate thickness, as shown in fig. 3. The groove arrangement can ensure that the connection weld joint between the reinforcing support plate 1 and the upper flange 3 of the T-shaped steel, the angle steel 5 and the adjacent 2 trapezoid rib plates 4 is completely penetrated, the defect of an initial welding root is avoided, and the fatigue strength of the weld joint is ensured. A schematic diagram of the weld distribution is shown in fig. 5.
As a further improvement of the technical scheme, the following steps are: the middle part of the reinforcing support plate 1 is provided with a plurality of round holes 7, preferably, 2 rows and 3 columns of round holes are uniformly arranged, as shown in fig. 2. The inner side of the round hole is provided with a V-shaped groove 8 (the bevel angle is 45 degrees) which is the same as the plate thickness, as shown in fig. 3, the groove direction is consistent with the groove directions of the upper edge, the lower edge and the two side edges, and the groove arrangement can ensure the full penetration of the welding seam between the reinforcing support plate 1 and the transverse support steel pipe 2, and ensure the fatigue strength of the welding seam. A schematic diagram of the weld distribution is shown in fig. 6.
As a further improvement of the technical scheme, the following steps are: one end surface of the transverse supporting steel pipe 2 is provided with a V-shaped groove 8 (the bevel angle is 45 degrees) with the same size as the wall thickness, and the groove direction is inward as shown in fig. 4. The groove arrangement can ensure the full penetration of the welding seam between the end face of the reinforcing support plate 1 and the main web 6, and ensure the fatigue strength of the welding seam. A schematic diagram of the weld distribution is shown in fig. 6.
The implementation method of the utility model is as follows:
firstly, processing a steel plate blank by a linear cutting method, cutting the steel plate blank into rectangular plates with 2215 multiplied by 455 multiplied by 12mm, and cutting 1/4 inner circular arcs 9 from four corners, wherein the radius of the circles is 50mm. The middle part of the steel plate is provided with round holes which are arranged in a 2X 3 array and uniformly distributed, wherein the diameter of each round hole is 77 mm. V-shaped grooves are formed in the edges of 4 straight lines on the upper side, the lower side, the left side, the right side and the like, and the groove size is 12mm. V-shaped grooves 8 are formed in the edges of the 6 round holes, the groove size is 12mm, and the reinforcing support plate 1 is manufactured.
And secondly, processing 6 steel pipes with phi 76 multiplied by 8 multiplied by 90mm by a wire cutting method, and grinding the end surfaces at two sides. And forming a V-shaped groove 8 on the circumference of the inner side of the round hole on one side end face, wherein the groove size is 8mm, namely the wall thickness, so as to prepare the transverse support steel pipe 2.
Thirdly, marking welding areas on the lower surface of the upper flange 3 of the T-shaped steel, the upper surface of the angle steel 5, the inner surfaces of the two trapezoid rib plates 4 and the outer surface of the main web 6 of the main beam, so that the distance between the outer surface of the reinforcing support plate 1 and the outer surface of the main web 6 is 75mm, and carrying out ash removal and paint removal treatment.
And thirdly, connecting the upper edge of the reinforcing support plate 1 with the fillet weld of the lower surface of the upper flange 3 of the T-shaped steel, connecting the lower edge of the reinforcing support plate with the fillet weld of the upper surface of the angle steel 5, and connecting the left and right edges of the reinforcing support plate with the fillet weld of the inner surfaces of two adjacent trapezoid rib plates 4 respectively. The beveled side of the transverse supporting steel pipe 2 passes through the round hole of the reinforcing supporting plate 1 and abuts against the outer surface of the main web 6, the inner circumference of the transverse supporting steel pipe 2 is welded to be connected with the main web 6 in a fillet weld mode, and the V-shaped beveled edge 8 of the round hole 7 of the reinforcing supporting plate 1 is welded to be connected with the outer circumference of the transverse supporting steel pipe 2 in a fillet weld mode.
In the embodiment, the reinforcing support plate 1 which is parallel to the main web 6 and welded with the peripheral structure into a whole plays a role of an additional web, and the main web 6 and the peripheral structure form a local box structure, so that the local strength and rigidity of the main beam under the action of wheel pressure can be obviously enhanced, and the problem of cracking of the detail structure caused by insufficient local strength and rigidity of the crane is effectively solved. The 6 transverse supporting steel pipes 2 are respectively welded with the reinforcing supporting plate 1 and the main girder web 6, so that the in-plane deformation of two large-size steel plates is effectively restrained, and the local reinforcing effect of the box-shaped structure is enhanced. The device has the characteristics of simple structure, easy installation, good reinforcement effect and the like, is suitable for various casting cranes, and can effectively prolong the service life of the casting cranes.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (10)
1. The utility model provides a local additional strengthening of casting crane girder of box structure, includes the main web, welds the T shaped steel top flange on main web top, the angle steel of horizontal welding on the main web, with a plurality of trapezoidal gusset of vertical welding between T shaped steel top flange and angle steel, its characterized in that still includes the reinforcing support board, reinforcing support board's four sides respectively with T shaped steel top flange, angle steel and two adjacent trapezoidal gusset welding.
2. The box-structured girder local reinforcing structure for a casting crane according to claim 1, wherein the reinforcing support plate is rectangular, and four corners have 1/4 inner circular arcs.
3. The local reinforcing structure according to claim 2, wherein the reinforcing support plate is provided with V-grooves on four sides having the same size as the plate thickness.
4. A box-structured local reinforcing structure for a main girder of a casting crane according to any one of claims 1 to 3, wherein the central portion of the reinforcing support plate is uniformly provided with a plurality of circular holes, the circular holes are provided with V-shaped grooves of the same size as the plate thickness, and the groove direction of the circular holes is identical to the groove direction of four sides of the reinforcing support plate.
5. The box-structured local reinforcing structure for main beams of a casting crane according to claim 4, wherein the middle part of the reinforcing support plate is provided with two rows of round holes, each row having three round holes.
6. The box-structured local reinforcing structure for a main girder of a casting crane according to claim 4, wherein a transverse supporting steel pipe is inserted into the circular hole, and a rear end of the transverse supporting steel pipe is welded to the main web.
7. The local reinforcing structure of the box-structured main girder of the casting crane, according to claim 6, wherein the rear end surface of the transverse supporting steel pipe is provided with a V-shaped groove with the same size as the wall thickness, and the groove direction is inward.
8. The box-configured cast crane girder local reinforcing structure of claim 6, wherein the inner circumference of the rear end of the lateral support steel pipe is connected with the main web in the form of a fillet weld.
9. The box-structured girder local reinforcing structure for a casting crane according to claim 6, wherein the transverse supporting steel pipe is connected with the outer circumference of the transverse supporting steel pipe in the form of a fillet weld at the circular hole groove of the reinforcing supporting plate.
10. A box-structured local reinforcing structure for a main girder of a casting crane according to any one of claims 1 to 3, wherein the upper edge of the reinforcing support plate is connected with the lower surface fillet of the upper flange (3) of the T-shaped steel, the lower edge is connected with the upper surface fillet of the angle steel, and the left and right edges are respectively connected with the inner surface fillet of two adjacent trapezoid rib plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321678105.3U CN220596821U (en) | 2023-06-29 | 2023-06-29 | Local additional strengthening of casting crane girder of box structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321678105.3U CN220596821U (en) | 2023-06-29 | 2023-06-29 | Local additional strengthening of casting crane girder of box structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220596821U true CN220596821U (en) | 2024-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321678105.3U Active CN220596821U (en) | 2023-06-29 | 2023-06-29 | Local additional strengthening of casting crane girder of box structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN220596821U (en) |
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2023
- 2023-06-29 CN CN202321678105.3U patent/CN220596821U/en active Active
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