CN214828435U - Large-scale metallurgical crane trolley rigid beam with web pre-arching curve - Google Patents

Abstract

A large-scale metallurgy crane trolley rigid beam with a web pre-arching curve comprises a speed reducer beam and a drum beam, wherein an intermediate connecting beam is arranged between the speed reducer beam and the drum beam; an upper box cover is arranged above the speed reducer beam, and a lower box body is arranged below the upper box cover; the speed reducer beam comprises a web, wherein a bending moment point C and a bending moment point D which are subjected to down-warping deformation and concentrated are contained in the web, the middle parts of the bending moment point C and the bending moment point D are web intermediate plates, a web end plate I is arranged from the bending moment point C to one end of the web, and a web end plate II is arranged from the bending moment point D to the other end of the web. The utility model discloses cross-sectional structure, load stress state and the welding deformation to large-scale metallurgical crane trolley stiffening beam (speed reducer roof beam) are studied, accomplish the stiffening web and encircle the curve design in advance, guarantee this large-scale metallurgical dolly and warp the requirement under the elasticity of welding shrinkage surplus and loaded state.

Description

Large-scale metallurgical crane trolley rigid beam with web pre-arching curve

Technical Field

The utility model relates to a monkey stiffening beam relates to a large-scale metallurgical monkey stiffening beam with web is curved in advance particularly.

Background

The main frame of the large metallurgical crane adopts a rigid beam tailor-welded structure, each rigid beam has the characteristics of complex welding structure, large welding filling amount, high welding deformation control requirement, strong bearing rigidity and the like, and particularly, the speed reducer beam adopts a variable cross-section hollow structure and is welded and molded with the lower speed reducer box body to jointly form a lower speed reducer box body cavity. In the blanking process of the conventional frame beam, the web plate is not provided with a pre-arching value, and the flatness or slight arching of each rigid beam of each frame is ensured by means of welding stress. The self weight of the large metallurgical crane trolley is about 120t, the effective bearing value is larger than 300t, the welding deformation of the beam side of the speed reducer is large, stress relief annealing treatment is needed, the treatment is troublesome, and camber change caused by welding stress cannot be well solved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: how to ensure that the speed reducer beam keeps straight or smoothly arched after welding, therefore, the rigid beam of the crane trolley is provided, which is pre-arched in advance when a web plate is blanked.

The technical scheme of the utility model specifically does:

a large-scale metallurgy crane trolley rigid beam with a web pre-arching curve comprises a speed reducer beam and a drum beam, wherein an intermediate connecting beam is arranged between the speed reducer beam and the drum beam; an upper box cover is arranged above the speed reducer beam, and a lower box body is arranged below the upper box cover; the speed reducer beam comprises a web plate, wherein the web plate contains a bending moment point C and a bending moment point D with concentrated downwarping deformation, the middle parts of the bending moment point C and the bending moment point D are web plate middle plates, a web plate end plate I is arranged from the bending moment point C to one end of the web plate, a web plate end plate II is arranged from the bending moment point D to the other end of the web plate, wherein,

the pre-camber of any camber-releasing point X on the web middle plate is,

the pre-camber of any camber-releasing point X on the web end plate I and the web end plate II is

Wherein L1 is the total length of the web, and X is the distance from the arch releasing point to the center point of the web.

Both sides of the middle connecting beam are provided with end beams, and the end beams are connected with the speed reducer beam and the winding drum beam.

Compared with the prior art, the utility model discloses following technological effect has: the method is used for researching the cross section structure, the load stress state and the welding deformation of the rigid beam (the speed reducer beam) of the large metallurgical crane trolley, completing the pre-arching curve design of the web plate of the rigid beam (the speed reducer beam), and ensuring the requirements of the large metallurgical crane trolley on the welding shrinkage allowance and the elasticity downwarping in the load state.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a position relationship diagram of the web bending moment point C, the bending moment point D and the arch releasing point of the present invention.

Detailed Description

The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.

As shown in figure 1, the large metallurgy crane trolley rigid beam with the web pre-arching curve comprises a speed reducer beam 1 and a drum beam 4, wherein an intermediate connecting beam 5 is arranged between the speed reducer beam 1 and the drum beam 4, and end beams 6 are arranged on two sides of the intermediate connecting beam. An upper box cover 3 is arranged above the speed reducer beam 1, and a lower box body 2 is arranged below the upper box cover 3. The speed reducer beam 1 comprises a web plate, wherein the web plate comprises a bending moment point C and a bending moment point D with concentrated downwarping deformation, the middle parts of the bending moment point C and the bending moment point D are web plate middle plates, a web plate end plate I is arranged from the bending moment point C to one end of the web plate, a web plate end plate II is arranged from the bending moment point D to the other end of the web plate, wherein,

the pre-camber of any camber-releasing point X on the web middle plate is,

the pre-camber of any camber-releasing point X on the web end plate I and the web end plate II is

Wherein, L1 is the total length of the web, X is the distance between the arch point and the center point of the web, and the arch point is any point on the pre-arch curve.

As can be seen from the quadratic parabolic equation,

in the formula:f _maxthe peak value of the parabola is shown as the peak value,Sis the maximum value in the direction of the X axis of the parabola.

In the domestic traditional crane experience formula:

f _max=(0.9—1.4)S/1000

through multiple test measurement, data statistics and least square calculation:

the middle plate of the web plate in the structure adopts a parabolic peak valuef _maxComprises the following steps:f _max=0.82S/1000

the web end plate I and the web end plate II adopt parabolic peak values as follows:f _max=S/1000。

in implementing the utility model discloses the time, need earlier carry out the analysis according to this type of frame welding and application, influence this type of frame speed reducer beam web is arched curve in advance mainly have following several aspects:

1) forming a speed reducer beam and changing camber caused by welding stress when the speed reducer beam is welded with the lower box body;

the camber change value of the crane speed reducer beam is measured through tests, the change value of the camber of the crane speed reducer beam has the tendency of large change curvature at two ends and gentle middle, the crane speed reducer beam conforms to a parabolic curve, and the maximum deformation is 11 mm.

2) Camber change caused by elastic downwarping of the workpiece under a loaded state;

stress load of the speed reducer beam is mainly concentrated on points C and D in the hoisting process, as shown in fig. 2, under the support of a support point A and a support point B, through ansys static state simulation, the maximum downwarping of the speed reducer beam is 2 mm, the maximum downwarping deformation is concentrated on a bending moment point C and a bending moment point D, and L2 is arranged between the bending moment point C and the bending moment point D.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, however, as long as there is no contradiction between the combinations of the technical features, the combinations of the technical features should be considered as the range described in the present specification, and when there is a mutual contradiction or cannot be realized, the combinations of the technical features should be considered as not being present, and are not within the scope of the present invention. Also, it will be apparent to those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the spirit of the principles of the present invention.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims (2)

1. A large-scale metallurgy crane trolley rigid beam with a web pre-arched curve comprises a speed reducer beam (1) and a drum beam (4), wherein an intermediate connecting beam (5) is arranged between the speed reducer beam (1) and the drum beam (4); an upper box cover (3) is arranged above the speed reducer beam (1), and a lower box body (2) is arranged below the upper box cover (3); the speed reducer beam (1) comprises a web plate, and is characterized in that: the web plate comprises a bending moment point C and a bending moment point D with concentrated downwarping deformation, the middle parts of the bending moment point C and the bending moment point D are web plate middle plates, a web plate end plate I is arranged from the bending moment point C to one end of the web plate, a web plate end plate II is arranged from the bending moment point D to the other end of the web plate, wherein,

the pre-camber of the web intermediate plate is

，

The pre-camber of the web end plate I and the web end plate II is

Wherein L1 is the total length of the web, and X is the distance from the arch releasing point to the center point of the web.

2. The large metallurgical crane trolley stiffening beam with web pre-arching curve according to claim 1, wherein: both sides of the middle connecting beam are provided with end beams (6), and the end beams (6) are connected with the speed reducer beam (1) and the winding drum beam (4).

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