RU2707898C1 - Triangular lattice support - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to construction, namely to lattice structures used in construction of supports of overhead transmission lines, supports for telecommunication antennas, wind-driven plants, etc. Triangular lattice support comprises three belts of closed polyhedral cross-section, connected along edges by rods of lattice. Each belt includes a post made of two angles, vertices of which along length are connected on welding, with location of their adjacent shelves directed inside the support at angle of 60° to each other, and adjacent shelves directed outward supports, respectively at angle of 120° to each other. To ends of adjacent shelves directed inside and outside the support, by longitudinal seams, two steel strips are welded, with formation of belt of closed polyhedral cross-section, which is two trihedral structures, having common rib in place of welding along length of tops of angles, first of which is located inside, and second is outside the support, wherein two faces of each of them are made of adjacent shelves of corners, located respectively at angles of 60° and 120° to each other, and their third faces are formed from steel strips, wherein rods of the lattice are attached to adjacent angles of angles located at angle of 60° to each other.

EFFECT: technical result achieved when realizing the invention consists in reduction of labor intensity and cost of making the support, as well as increase in its strength.

1 cl, 4 dwg

Description

The invention relates to construction, namely to lattice structures used in the construction of towers of overhead power lines, towers for telecommunication antennas, wind turbines, etc.

Known trihedral lattice design, including open cross-section belt made of I-beams [1]. A disadvantage of the known design is the increased consumption of steel associated with the use of an open cross section of the belts, which necessitates an increase in the thickness of the section of the belts to ensure local stability of the structure when exposed to an allowable bending moment.

Also known is a trihedral lattice support, including closed polyhedral cross-section belts made of steel sheet, connected at the edges by lattice rods of round pipes with a cutout for connection with sheet shapes formed by bending the edges of the steel sheet [2]. A disadvantage of the known technical solution is that sheet gussets for fastening lattice rods of round pipes, which are thin long plates working in compression, lose local stability at low critical stress values.

The closest device - an analogue to the claimed technical solution is a trihedral lattice support containing three belts of closed polyhedral cross-section, connected along the edges by lattice rods [3]. A disadvantage of the known support is the high complexity and cost of its manufacture using expensive bending equipment, which is associated with the implementation of a closed multi-faceted section of a sheet steel belt by repeatedly bending it and then bending the edges of the sheet metal in the opposite direction. In addition, the cross section of the thin-walled structure of the multifaceted belt is significantly weakened by the weld in the places of welding of the lattice rods to it, which significantly reduces the strength of the support.

The objective of the invention is to reduce the complexity and cost of manufacturing supports, as well as increasing its strength.

The technical result achieved by the implementation of the invention consists in reducing the complexity and cost of manufacturing the support, as well as increasing its strength.

The specified technical result is ensured by the fact that in the known trihedral lattice support containing three belts of closed polyhedral cross-section, connected along the sides by lattice rods, according to the claimed invention, each support belt includes a rack made of two angles, the vertices of which are connected by welding along the length, the location of their adjacent shelves directed inward of the support at an angle of 60 ° to each other, and adjacent shelves directed outward of the support, respectively, at an angle of 120 ° to each other, while to the ends of adjacent shelves, n of the supports directed in and out, two steel strips are welded with longitudinal seams, with the formation of a closed polyhedral cross-sectional belt, which is two trihedral structures having a common rib at the weld point along the length of the corners, the first of which is located inside and the second outside the support, while two faces of each of them are made of adjacent shelves of corners located respectively at angles of 60 ° and 120 ° to each other, and their third faces are formed of steel strips, with the lattice rods attached to welding adjacent m shelves of corners located at an angle of 60 ° to each other.

Due to the fact that each support belt includes a stand made of two angles, the vertices of which are connected along the length of the weld, with the location of their adjacent shelves directed inward of the support at an angle of 60 ° to each other, and adjacent shelves directed outward of the support, respectively, under angle of 120 ° to each other, while to the ends of adjacent shelves directed inward and outward of the support, two steel strips are welded with longitudinal seams, a closed polyhedral section belt is formed, which is two trihedral structures having a common edge in welding along the lengths of the corners. Moreover, trihedral structures that make up a strong and rigid bearing frame of the belt are the most economical in terms of steel consumption in comparison with structures having a different number of faces [4], which allows to increase the strength of the entire support, with its minimum metal consumption.

In addition, the structural form of the belt, in which two trihedral structures having a common rib at the weld along the lengths of the corners, make up its supporting frame, allows the principle of material concentration in the main supporting element of the belt [5] to be implemented, which further reduces the consumption of steel.

Attaching the grating rods directly to the corners of the corners for welding ensures high strength of the weld.

The invention is illustrated by the drawings in FIG. 1-4.

In FIG. 1 shows a general view of a trihedral lattice support, while two faces of the background of the lattice are not conventionally shown; in FIG. 2 shows a perspective view of a grid mount; in FIG. 3 shows a section AA in FIG. one; in FIG. 4 shows the remote element II in FIG. 3.

The trihedral lattice support contains three belts of closed polyhedral cross-section 1. Belt 1 includes a rack 2 made of corners 3 and 4, the vertices of which are connected along the length of welding 5, with the location of their adjacent shelves directed into the support at an angle of 60 °, and adjacent shelves outwardly directed bearings, respectively, at an angle of 120 °. Two steel strips, 6 and 7, respectively, are welded to the ends of adjacent shelves, directed inward and outward of the support, with the formation of a belt of closed polyhedral cross-section 1, which is two trihedral structures 8 and 9, having a common rib at the welding point along the length of the corners 3 and 4 by seam 5. In this case, two faces of the trihedral structures 8 and 9 are made of adjacent shelves of corners located respectively at angles of 60 ° and 120 ° to each other, and their third faces are formed of steel strips 6 and 7. The rods of the grill 10, on Example cross section of an angle, are attached to the welding to the adjacent corners of the shelves 3 and 4 disposed at an angle of 60 ° to each other.

Thus, the invention allows to increase the strength of a trihedral lattice support, as well as to reduce the complexity and cost of its manufacture.

Literature

1. Patent RU 2378469, IPC Е04Н 12/10, Е 04С 3/08, published January 10, 2010. Bull. No. 1.

2. Patent RU 2584337, IPC Е04Н 12/10, published on 05/20/2016. Bull. Number 14.

3. Patent RU 2641354, IPC Е04Н 12/10, published January 17, 2018. Bull. No. 2.

4. Belena E.N. Metal constructions. General course: Textbook for high schools / E.N. Belenya, V.A. Baldin, G.S. Vedenikov, B.N. Koshchutin, B.Yu. Uvarov, A.B. Pukhovsky, T.N. Morachevsky, D.N. Streletsky. M .: Stroyizdat, 1986 .-- 560 p.

5. Metal structures. In 3 t. T. 1. General. (Designer Handbook) / Under the general. ed. Kuznetsova V.V. - M .: DIA publishing house, 1998 .-- 576 p.

Claims (1)

A trihedral lattice support containing three belts of closed multifaceted cross-section, connected along the sides by lattice rods, characterized in that each belt includes a rack made of two angles, the vertices of which are connected along the length of the weld, with the location of their adjacent shelves directed into the support at an angle 60 ° to each other, and adjacent shelves directed outward of the support, respectively, at an angle of 120 ° to each other, while to the ends of adjacent shelves directed inward and outward of the support, two steel strips are welded with longitudinal seams, with By calling a closed polyhedral cross-sectional belt, which is two trihedral structures having a common edge at the weld along the lengths of the corners, the first of which is located inside and the second is outside the support, while two faces of each of them are made of adjacent shelves of corners located respectively under angles of 60 ° and 120 ° to each other, and their third faces are formed of steel strips, and the lattice rods are attached to welding to adjacent shelves of corners located at an angle of 60 ° to each other.

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