Curve steel structure jig frame for manufacturing special-shaped steel box girder

Abstract

The utility model relates to a curve steel structure jig frame for manufacturing special-shaped steel box girders, which solves the problem that the accuracy is not high when the special-shaped steel box girders are spliced and welded into a whole section by section. The device is formed by combining an upper curve sample frame and a lower steel structure support, the cambered surface of the upper curve sample frame is matched with the symmetrical cambered surface of the lower portion of the special-shaped steel box girder, a plurality of transverse beams and a plurality of longitudinal beams are welded to form the curve sample frame, and the lower steel structure support is arranged below the longitudinal beams through a plurality of vertical stand columns and welded to the longitudinal beams. The vertical columns are welded and reinforced through the cross-shaped supports, and a plurality of small limiting steel plates are welded to the edge of the curve sample frame to temporarily fix the special-shaped steel box girder to be assembled.

Description

Technical Field

[0001] This utility model relates to the field of steel structure jig technology, and is related to a welding platform for assembling prefabricated irregular steel box girders into a whole. Background Technology

[0002] The irregularly shaped steel box girder is a symmetrical arc shape. Traditionally, the assembly and welding of irregularly shaped steel box girders is carried out on a platform. This assembly and welding involves welding the arc-shaped steel plates of the irregularly shaped steel box girder segment by segment. The arc surfaces of the steel plates have few contact points with the traditional platform, leading to safety issues such as the risk of the steel plates falling and damaging the box girder during segmented assembly and welding. Furthermore, controlling the precision of segmented assembly and welding of the steel box girder is difficult, resulting in high production costs and low efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a curved steel structure jig for the fabrication of irregular steel box girders, which offers good operational safety, high precision and efficiency in the segmented assembly and welding of steel plates for irregular steel box girders, and low cost.

[0004] The purpose of this utility model is achieved as follows:

[0005] The curved steel structure jig used for fabricating irregular steel box girders consists of an upper curved template and a lower steel structure support. The curved surface of the upper curved template matches the curved surface of the irregular steel box girder. The curved template is formed by welding several transverse beams 1 and several longitudinal beams 2. The lower steel structure support consists of several vertical columns 3 arranged below the longitudinal beams 2 and welded to the longitudinal beams. The vertical columns are reinforced by welding cross braces 4. Several small limiting steel plates 6 are welded to the edge of the curved template to temporarily fix the steel plates of the irregular steel box girder to be spliced.

[0006] The transverse and longitudinal beams are made of angle steel, while the columns and cross braces are made of steel bars.

[0007] This invention manufactures irregularly shaped steel box girders by dividing them into two symmetrical sections. Only one steel structure jig is needed to manufacture both symmetrical sections, ensuring accurate positioning. The steel plates of the segmented irregularly shaped steel box girder are safely and stably assembled and welded on the curved steel structure jig, preventing slippage and falls that could damage the box girder. The curved jig, composed of angle steel and welded steel plates, improves the measurement and layout work during the segmented fabrication of irregularly shaped steel box girders. It is not only easy to process and cost-effective, but also significantly reduces operational safety issues such as slippage and falls that could damage the box girder during segmented fabrication. It also solves the precision control problem during segmented fabrication, improving the efficiency of irregularly shaped steel box girder fabrication at the lowest cost. The precision control problem during on-site assembly of the two symmetrical parts of the segmented irregularly shaped steel box girder is easily solved. Attached Figure Description

[0008] Figure 1 This is the front view of the present invention.

[0009] Figure 2 for Figure 1 Top view.

[0010] Figure 3 for Figure 1 The left view.

[0011] Figure 4 for Figure 1 The right view.

[0012] Figure 5 Diagram showing the combination of the steel structure frame and the irregularly shaped steel box girder to be assembled.

[0013] Figure 6 for Figure 5 Top view.

[0014] Figure 7 for Figure 5 Left view.

[0015] Figure 8 for Figure 5 Right view. Detailed Implementation

[0016] This utility model manufactures irregularly shaped steel box girders into two symmetrical sections. Only one steel structure jig is needed to manufacture the two symmetrical sections of the irregularly shaped steel box girder. The curved steel structure jig is composed of an upper curved template and a lower steel structure support. The arc surface of the upper curved template matches the arc surface below the two symmetrical sections of the irregularly shaped steel box girder. The curved template is formed by welding several transverse beams 1 and several longitudinal beams 2. The lower steel structure support is formed by several vertical columns 3 arranged below the longitudinal beams 2 and welded to the longitudinal beams. The vertical columns are reinforced by welding cross braces 4. Several small limiting steel plates 6 are welded to the edge of the curved template to temporarily fix the steel plates of the irregularly shaped steel box girder to be spliced. The curved template on the upper part of the steel structure frame is obtained by calculating the corresponding coordinates based on the curve equation of the irregular steel box girder provided in the design drawings. Four full-length 100×30mm angle steel transverse beams 1 are bent on a CNC plate rolling machine to form the curved template. Ten full-length 100×30mm angle steel longitudinal beams 2 are placed below the four full-length transverse angle steel beams 1 and welded to the full-length transverse flat steel beams 1 to form the curved template. Forty 140mm×140mm×15mm flat steel columns 3 are arranged below the ten longitudinal flat steel beams 2 and welded to the longitudinal beams. Thirty 100mmx30mm flat steel transverse cross braces 4 and thirty 50mmx30mm flat steel longitudinal cross braces 5 are welded to the forty flat steel columns 3 for reinforcement, increasing the load-bearing capacity of the curved frame, and the combination forms the curved steel structure frame. When fabricating irregular-shaped steel box girders, the cut steel plate material is placed in sections on a curved steel structure jig, and small 200mm×150mm×10mm limiting steel plates 6 are welded to the edge of the curved steel structure jig for temporary fixation. In this way, the cut steel plate material can be placed on the curved steel structure jig for assembly and welding, and the irregular-shaped steel box girder can be fabricated in sections.

Claims

1. A curved steel structure jig frame for making a special-shaped steel box girder, characterized in that, It consists of an upper curved frame and a lower steel structure support. The upper curved frame arc surface matches the arc surface under the irregular steel box girder. The curved frame is formed by welding several transverse beams (1) and several longitudinal beams (2). The lower steel structure support is formed by several vertical columns (3) arranged below the longitudinal beams (2) and welded to the longitudinal beams. The vertical columns are reinforced by welding cross braces (4). Several small limiting steel plates (6) are welded to the edge of the curved frame to temporarily fix the steel plate of the irregular steel box girder to be spliced.

2. The curved steel structure jig frame for the special-shaped steel box girder manufacturing according to claim 1, characterized in that, The transverse and longitudinal beams are made of angle steel, while the columns and cross braces are made of steel bars.

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