Middle latticed column steel tube concrete framework of 750kV transformer substation

Abstract

A middle latticed column concrete filled steel tube framework of a 750kV transformer substation comprises inlet and outlet wire framework columns and bus framework columns, the inlet and outlet wire framework columns and the bus framework columns are paired and then linearly arranged in multiple groups, the inlet and outlet wire framework columns located in the middle are inlet and outlet wire middle concrete filled steel tube latticed columns, and the bus framework columns are arranged in multiple groups. The rest incoming and outgoing line frameworks are concrete-filled steel tube herringbone columns on the two sides of incoming and outgoing lines; wire inlet and outlet beams are mounted at the tops of the adjacent wire inlet and outlet framework columns; bus beams are mounted on the bus framework columns and the inlet and outlet wire framework columns which are arranged in pairs, and the tops of the inlet and outlet wire framework columns are connected with ground wire columns through flanges. The problem that the 750kV herringbone column framework with the end supports on the two sides is large in occupied area is solved under the condition that using conditions are completely met.

Description

Technical Field

[0001] This utility model belongs to the field of ultra-high voltage power transmission and transformation technology, and relates to a structural framework of a 750kV substation, specifically a steel pipe concrete frame with intermediate lattice columns in a 750kV substation. Background Technology

[0002] With the rapid development of ultra-high voltage power transmission in my country, the construction speed of 750kV substations has accelerated dramatically, highlighting the growing contradiction between the limited available land around urban areas and the large land area required for 750kV substations. Currently, most completed 750kV substations adopt a herringbone structure with end supports, whose footprint directly affects the overall land area of ​​the substation. Therefore, improvements are needed to the structural design of 750kV substations with end supports. Utility Model Content

[0003] This utility model provides a 750kV substation intermediate lattice column steel pipe concrete frame that saves land, reduces engineering costs, and fully meets the usage conditions.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A 750kV substation intermediate lattice column steel-concrete composite frame includes incoming / outgoing line frame columns and busbar frame columns. The incoming / outgoing line frame columns and busbar frame columns are arranged in pairs in a straight line in multiple groups. The middle incoming / outgoing line frame column is a steel-concrete composite lattice column, and the remaining incoming / outgoing line frames are steel-concrete composite herringbone columns on both sides of the incoming / outgoing line. Incoming / outgoing line beams are installed on the top of adjacent incoming / outgoing line frame columns. Busbar beams are installed on the paired busbar frame columns and incoming / outgoing line frame columns. The top of the incoming / outgoing line frame columns is connected to the grounding column through a flange.

[0006] The busbar frame columns are uniform cross-section steel-concrete composite herringbone columns.

[0007] In this utility model, the two outermost incoming and outgoing line frame columns are made of steel-concrete composite A-frame columns, and the middle incoming and outgoing line frame column is made of steel-concrete composite lattice column. Compared with the conventional incoming and outgoing line frame columns, which are all steel-concrete composite A-frame columns and have end supports at the two outermost ends, this invention eliminates the two end supports at the outermost ends of the conventional incoming and outgoing line A-frame columns and improves the middle incoming and outgoing line steel-concrete composite A-frame column to a steel-concrete composite lattice column. This solves the problem of large footprint of the 750kV A-frame structure with end supports on both sides while fully meeting the usage conditions. Attached Figure Description

[0008] Figure 1 A three-dimensional structural diagram of a conventional 750kV A-frame structure with end bracing at both ends;

[0009] Figure 2This is a three-dimensional structural schematic diagram of the present invention;

[0010] Figure 3 This is a front view of the present invention;

[0011] Figure 4 This is a side view of the present invention;

[0012] Figure 5 Stress cloud diagram of a conventional steel-concrete composite frame with end supports at both ends;

[0013] Figure 6 This is a stress cloud diagram of the steel-concrete composite frame with intermediate lattice columns of this utility model.

[0014] In the diagram: 1-Steel-concrete herringbone column with end bracing on both sides of the incoming and outgoing lines; 1'-Steel-concrete herringbone column with end bracing on both sides of the incoming and outgoing lines; 2-Incoming and outgoing line frame column; 3-Incoming and outgoing line middle steel-concrete herringbone column; 3'-Incoming and outgoing line middle steel-concrete lattice column; 4-Busbar frame column; 5-Herringbone column crossarm; 6-Herringbone column head; 7-Busbar beam; 8-Incoming and outgoing line beam; 9-Ground wire column; 10-Herringbone column head with ground wire. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] Reference Figure 2 , Figure 3 , Figure 4 A 750kV substation intermediate lattice column steel-concrete composite frame includes incoming / outgoing line frames 2 and busbar frame columns 4. The incoming / outgoing line frame columns 2 and busbar frame columns 4 are arranged in pairs in a straight line in multiple groups. The middle incoming / outgoing line frame column 2 is a central steel-concrete composite lattice column 3', and the remaining incoming / outgoing line frame columns 2 are steel-concrete composite herringbone columns 1' on both sides of the incoming / outgoing line. Incoming / outgoing line beams 8 are installed on the top of adjacent incoming / outgoing line frame columns 2. Busbar beams 7 are installed on the paired busbar frame columns 4 and incoming / outgoing line frame columns 2. The top of the incoming / outgoing line frame columns 2 is connected to a grounding column 9 via a flange. The crossarms 5 of the herringbone columns are welded to the busbar frame columns 4 to strengthen the herringbone columns. The column heads 6 of the herringbone columns are flanged to the busbar frame columns 4, and the column heads 10 of the herringbone columns with grounding columns are flanged to the grounding column 9.

[0017] The busbar frame column 4 is a steel-concrete composite herringbone column with uniform cross-section. The cross-section of the frame column is determined by the overall stress calculation of the frame. Generally, the bottom of the frame column is subjected to greater stress. To facilitate standardized factory processing and the jacking and pouring of concrete inside the steel pipe, the frame columns all use steel pipes with uniform cross-section.

[0018] Using SAP2000 finite element analysis software, modeling and calculations were performed on a conventional steel-concrete composite frame with end-braced A-frame columns and a steel-concrete composite frame with intermediate lattice columns as described in this utility model. Through combined calculations under various working conditions, it was found that temperature conditions are the controlling condition for the end frames and local members of the end-braced frames, but have no controlling effect on the intermediate lattice steel-concrete composite frame. Figure 5 , Figure 6 The stress cloud diagram shows that both structural schemes meet the design requirements (maximum stress ratio of members ≤ 1.0). Comparing the two steel-concrete composite A-frame structures—one with a central lattice and the other with end bracing—the steel consumption of the frame columns in both structural forms shows a significant decreasing trend as the column base opening increases. In summary, the steel-concrete composite frame with a central lattice column of this utility model can meet all design requirements, and the amount of steel pipe and concrete used is comparable. Furthermore, by eliminating the end bracing and replacing it with a central lattice column, the overall length of the frame is shortened, thus achieving the effect of saving land in the 750kV substation distribution area.

Claims

1. A 750 kV substation lattice column steel pipe concrete frame comprising an incoming and outgoing line frame column, a bus frame column, characterized in that, The incoming and outgoing line frame columns (2) and busbar frame columns (4) are arranged in pairs in a straight line in multiple groups. The middle incoming and outgoing line frame column (2) is a steel pipe concrete lattice column (3') in the middle of the incoming and outgoing line, and the remaining incoming and outgoing line frame columns (2) are steel pipe concrete herringbone columns (1') on both sides of the incoming and outgoing line. The top of the adjacent incoming and outgoing line frame columns (2) is equipped with incoming and outgoing line beams (8). The paired busbar frame columns (4) and incoming and outgoing line frame columns (2) are equipped with busbar beams (7). The top of the incoming and outgoing line frame columns (2) is connected to the ground wire column (9) through a flange.

2. The 750 kV substation lattice column concrete filled steel tubular frame according to claim 1, characterized in that, The busbar frame column (4) is a steel-concrete composite herringbone column with equal cross-section.

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