CN217760297U - Simple and easy newly-increased hanging point structure on existing steel framework triangular truss girder of transformer substation - Google Patents

Abstract

The utility model discloses a simple and easy newly-increased on the existing steel framework triangle-shaped truss roof beam of transformer substation hangs some structure, has solved how simple and efficient ground realizes under the circumstances about not having a power failure newly-increased on existing steel framework hang some and make the reasonable problem of atress of whole steel framework. The novel cantilever type truss structure comprises an upper chord (3), a front lower chord (1) and a rear lower chord (2) which form a triangular truss, wherein a tubular hoop (9) is arranged on the front lower chord (1) between pitches of two adjacent front side straight web members (4), a cantilever type newly-increased hanging point plate (11) is fixedly connected to the front outer side surface of the tubular hoop (9), and a newly-increased hanging point plate stiffening plate (12) is arranged between the cantilever type newly-increased hanging point plate (11) and the front outer side surface of the tubular hoop (9). Has certain economic benefit and better social benefit.

Description

Simple and easy newly-increased hanging point structure on existing steel framework triangular truss girder of transformer substation

Technical Field

The utility model relates to an existing steel framework of transformer substation, in particular to simple and easy newly-increased string point structure on the existing steel framework triangle-shaped truss of transformer substation.

Background

The transformer substation framework is a rigid framework combination and is an important infrastructure for connecting a transformer and a transmission line; the coverage area of the power transformation framework and the hanging wires thereof is about half of the floor area of the whole transformer substation, and the power transformation framework and the hanging wires thereof are used as key links of a power transmission and distribution network, so that the safe and stable operation of the transformer substation is of great importance; the transformer substation framework mainly comprises framework columns and framework beams, and the structure of the transformer substation framework can be divided according to materials: the steel structure power transformation framework and the concrete structure power transformation framework are widely applied to actual engineering and are the steel structure frameworks; the design service life of a transformer substation framework is generally 50 years, and in the period, due to the change of the electric load around the transformer substation, the capacity increase and transformation of the transformer substation can be caused, the adjustment of an electric scheme is caused, and the adjustment of the position of a wire hanging point of the transformer substation framework and the adjustment of the load of a wire are caused; in addition, due to changes of external conditions such as system schemes, owner requirements and the like, the adjustment of an electrical scheme in a station can be caused, so that the positions of the wire hanging points of the original power transformation framework and the load of the wires are adjusted; however, the change of the position of the hanging point has difficulties for the triangular steel truss girder commonly used in the transformer substation, and the general method needs to adjust the internode arrangement of the steel truss girder, so that the new hanging point is positioned at the node to achieve the purpose of reasonable stress, but the problem of doing so is that the built truss girder needs to be dismantled and rebuilt, which causes great time waste and economic loss; if the framework is not dismounted, the welding connection operation of a new hanging point can be carried out after the related power transmission lines are subjected to power failure treatment.

Disclosure of Invention

The utility model provides a simple and easy newly-increased on the existing steel framework triangle-shaped truss roof beam of transformer substation hangs some structure, has solved how simple and convenient swiftly and has realized newly-increased on existing steel framework under the circumstances of not having a power failure and hang some and make the reasonable technical problem of atress of whole steel framework.

The utility model discloses a solve above technical problem through following technical scheme:

a simple newly-added hanging point structure on a triangular truss girder of an existing steel framework of a transformer substation comprises an upper chord, a front lower chord and a rear lower chord which form the triangular truss, wherein a front side straight web member and a front side inclined web member are respectively arranged between the upper chord and the front lower chord, a bottom side straight web member and a bottom side inclined web member are respectively arranged between the front lower chord and the rear lower chord, an existing hanging point is arranged on the front lower chord, a tubular hoop is arranged on the front lower chord between pitches of two adjacent front side straight web members, an overhanging-shaped newly-added hanging point plate is fixedly connected to the front outer side surface of the tubular hoop, and a newly-added hanging point plate stiffening plate is arranged between the overhanging-shaped newly-added hanging point plate and the front outer side surface of the tubular hoop.

The tubular hoop is two channel steels buckled together, inner side stiffening plates with arc grooves are arranged on the inner side surfaces of the channel steels at intervals, and the arc grooves of the inner side stiffening plates are clamped on the front lower chord.

The utility model discloses not demolising the girder steel and also need not to carry out under the condition that has a power failure, can satisfy the requirement that the technology hung the point, the material of having saved newly-built girder steel is about, has shortened the girder steel and has newly-built and installation period, has certain economic benefits and better social.

Drawings

Fig. 1 is a schematic structural view in the front view direction of the present invention;

fig. 2 is a schematic structural view in the bottom view direction of the present invention;

fig. 3 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A in fig. 1.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

a simple newly-added hanging point structure on a triangular truss beam of an existing steel framework of a transformer substation comprises an upper chord 3, a front lower chord 1 and a rear lower chord 2, wherein a front side straight web member 4 and a front side inclined web member 5 are respectively arranged between the upper chord 3 and the front lower chord 1, a bottom side straight web member 6 and a bottom side inclined web member 7 are respectively arranged between the front lower chord 1 and the rear lower chord 2, an existing hanging point 8 is arranged on the front lower chord 1, a tubular hoop 9 is arranged on the front lower chord 1 between pitches of the two adjacent front side straight web members 4, an overhanging-shaped newly-added hanging point plate 11 is fixedly connected to the front outer side surface of the tubular hoop 9, and a newly-added hanging point plate stiffening plate 12 is arranged between the overhanging-shaped newly-added hanging point plate 11 and the front outer side surface of the tubular hoop 9.

The tubular hoop 9 is two channel steels buckled together, inner side stiffening plates 10 with arc grooves are arranged on the inner side surfaces of the channel steels at intervals, and the arc grooves of the inner side stiffening plates 10 are clamped on the front lower chord 1; the tubular hoop 9 is connected through bolts, is convenient to disassemble and assemble, and can better meet the construction requirements of later-stage hanging point transformation of the framework.

The utility model inherits the principle of saving resources, develops a simpler novel detachable hanging point, enables the newly-increased hanging point to be arranged between the 4 pitches of two adjacent front side straight web members in the framework beam span, realizes the position determination of the newly-increased hanging point by selecting different positions of the tubular hoop 9, and is not limited by the arrangement between beam joints, thereby improving the compatibility of the lattice beam to the hanging point and reducing the influence brought by the change of the hanging point in the later period; simultaneously, based on different novel detachable hanging points, the most common framework column in the transformer substation is A-shaped column, the framework beam is 500kV outgoing line framework and main transformer framework of lattice type beam, the weakest ring node of atress is selected, and through the finite circle atress analysis mode, whole mechanics analysis and whole deformation, hanging point atress and deformation analysis have been carried out, the following main research conclusion is drawn: the utility model has the advantages that the change of the force of the upper chord and the straight web member is small, the maximum tension of the diagonal web member is increased, the lower chord generates large bending moment because the hanging point is in the middle of the internode, the stress of the lower chord of the framework girder is increased more, and the framework with large margin required for the bearing capacity of the lower chord of the framework girder can be adopted; when the detachable hanging point 1 of the utility model is positioned in the center between the chord sections and the joint action of the axial force and the bending moment is considered, compared with the original hanging point scheme, the detachable hanging point scheme of the utility model increases the stress ratio of the chord from 47 percent to 83 percent and has larger expansion amplitude; in the practical process of the scheme, necessary strengthening measures are suggested to be taken for the chord member, and the bending rigidity of the section of the chord member is increased; the utility model discloses a transformer substation's girder steel adjustable device can satisfy the requirement of technology string point under the former girder steel condition of not demolising, has certain economic benefits, has solved engineering construction and has had a power failure difficult and hoist and mount difficult actual problem especially in the reconstruction extension engineering, when guaranteeing design quality, has satisfied the project time limit for a project requirement, and social is obvious.

Claims (2)

1. The utility model provides a simple and easy newly-increased hanging point structure on existing steel framework triangle-shaped truss of transformer substation, including last chord member (3), preceding lower chord member (1) and back lower chord member (2) that constitute the triangle-shaped truss, between last chord member (3) and preceding lower chord member (1), be provided with front side straight web member (4) and front side diagonal web member (5) respectively, between preceding lower chord member (1) and back lower chord member (2), be provided with bottom surface straight web member (6) and bottom surface diagonal web member (7) respectively, be provided with existing hanging point (8) on preceding lower chord member (1), its characterized in that, on preceding lower chord member (1) between two adjacent front side straight web member (4) pitches, be provided with tubulose staple bolt (9), fixedly connected with newly-increased hanging point board (11) of overhanging form on the preceding lateral surface of tubulose staple bolt (9), be provided with newly-increased hanging point board (12) between the preceding lateral surface of newly-increased hanging point board (11) and tubulose staple bolt (9).

2. The simple new hanging point structure on the triangular truss of the existing steel framework of the transformer substation according to claim 1, characterized in that the tubular hoop (9) is two steel channels which are fastened together, inner stiffening plates (10) with arc-shaped grooves are arranged on the inner side surfaces of the steel channels at intervals, and the arc-shaped grooves of the inner stiffening plates (10) are fastened on the front lower chord (1).

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