RU95350U1 - INTERMEDIATE PORTAL BRACKET FOR HIGH-VOLT ELECTRIC TRANSMISSION LINE - Google Patents

Abstract

 1. A single-chain intermediate support of a portal type for a power line, comprising two racks, each of which is made of three steel polyhedral sections joined by means of flange connections, and a composite cross-beam of a crossbar pivotally mounted between the upper sections of the racks, and two consoles mounted on the upper sections of the racks by means of flange connections, while the racks are pulled together by cross-links, their upper sections are tightened, the traverse consoles are additionally fixed to the upper sections x struts supporting rods, and the lower base sections of uprights provided with flanges for attachment to the foundation. ! 2. The support according to claim 1, characterized in that the sections of the rack are made of twelve-sided, and the crossbar and console traverse - octagonal of a bent steel sheet. ! 3. The support according to claim 1, characterized in that the crossbar of the crosshead is additionally fixed to the upper sections of the struts by supporting rods. ! 4. The support according to claim 1, characterized in that the cross-ties, coupler and supporting rods are made of round metal.

Description

Technical field

The utility model relates to intermediate supports of high voltage overhead power transmission lines (OHL) and can be used in the manufacture of supports for 330 kV OHL and 500 kV OHL.

State of the art

Known, selected as a prototype, an intermediate portal support for a high-voltage power line [patent RU86211 U1 MPK E04N 12/08 op. 08/27/09], containing two racks, each of which is made of the lower, middle and upper telescopically docked steel polyhedral sections and mounted on the upper section of the cable rack with a cable console rigidly fixed on it, a multi-faceted cross-beam, the crossbar and consoles of which are pivotally mounted on the racks , while the cable is connected to the upper sections by flange connections, and the bases of the lower sections are provided with flanges for fastening to the foundation.

As the tests showed, the prototype support has insufficient rigidity, strength and resistance to mechanical stress.

The objective of the utility model is to eliminate these drawbacks.

Utility Model Essence

The object of the utility model is a single-chain gantry-type intermediate support for a power line containing two racks, each of which is made of three steel multifaceted sections joined by means of flange connections, and a composite cross-beam of a crossbar fixed pivotally between the upper sections of the racks, and two consoles fixed to the upper sections of the racks by means of flange connections, while the racks are pulled together by cross-links, their upper sections are secured by a coupler; flax fixed on the upper sections of the pillars supporting rods, and the lower base sections of uprights provided with flanges for attachment to the foundation.

The claimed utility model differs from the prototype in that the strut sections are joined by means of flange, rather than telescopic connections, while the struts are pulled together by cross-links, their upper sections by a coupler, and the traverse consoles are additionally fixed to the upper sections of the struts by means of flange connections and supporting rods.

The specified set of features allows to increase the stiffness, strength and resistance of the support to mechanical stress.

The utility model has developments for particular cases of its implementation, which consist in the fact that

- sections of the rack are made of twelve-sided, and the crossbar and console traverse - octagonal of a bent steel sheet;

- the crossbeam is additionally fixed to the upper sections of the struts with supporting rods;

- cross connections, coupler and supporting rods are made of round metal.

Brief Description of the Figures

Figure 1 presents a structural diagram of the support.

Implementation of a utility model, taking into account its development

Figure 1 shows:

- two racks 1 and 2, each of which is made of lower, middle, and upper steel polyhedral sections 3, 4, 5, respectively, joined by means of flange joints 6 and 7;

- Compound multifaceted traverse from the crossbar 8 and two consoles 9 and 10.

Consoles 9 and 10 of the traverse are fixed on the upper sections 5 of the racks 1 and 2 by means of flange connections 11, 12 and supporting rods 13, 14, respectively. The crossbar 8 is fixed on sections 5 of each rack by swivel joints 15. Its fastening on racks 1 and 2 can be additionally strengthened by supporting rods 16, 17, mounted on the upper sections 5 of the respective racks.

Racks 1 and 2 are pulled together by cross-links 18 and 19, and their upper sections 5, in addition, by tie 20.

The bases of the lower sections 3 are provided with flanges 21 for fastening to the foundation (not shown in the figure).

The support is delivered to the installation site in a disassembled form for structural elements and mounted in the form of a free-standing structure. For each of the uprights 1 and 2, flange connections 6 and 7 are braked. On sections 5 of the uprights 1 and 2, consoles 9 and 10 are fixed with flange connections 11 and 12, respectively.

Each end of the crossbar 8 is attached using a swivel joint 15 in the form of a hinge bolt inserted into a horizontal hole made in section 5. The consoles 9, 10 and the crossbar 8 are additionally fixed to sections 5 by rods 13, 14 and 16, 17.

All sections of the racks, the crossbar and the console traverses are made of multifaceted bent sheets of steel. Consoles are in the form of polyhedral truncated pyramids. Sections 3, 4, and 5 have twelve faces, and consoles 9 and 10 have eight faces.

Supporting rods 13, 14, 16, 17, cross-links 18, 19 and coupler 20 are made of round steel.

To the upper ends of the sections 5, cable consoles 22 are rigidly attached.

After mounting the support on it with the help of brackets, insulating garlands for three phase wires of the overhead line are suspended. The extreme phase wires are suspended on a single insulating string attached to the ends of the consoles 9, 10 and the middle phase wire is suspended on a V-shaped insulating string between posts 1 and 2 under the crossbar 8.

The distance between the supports, the height of the racks, the corresponding dimensions of the sections and the height of the traverse mounting are selected depending on the voltage of the overhead line - 330 or 500 kV.

Claims (4)

1. A single-chain intermediate support of a portal type for a power line, comprising two racks, each of which is made of three steel polyhedral sections joined by means of flange connections, and a composite cross-beam of a crossbar pivotally mounted between the upper sections of the racks, and two consoles mounted on the upper sections of the racks by means of flange connections, while the racks are pulled together by cross-links, their upper sections are tightened, the traverse consoles are additionally fixed to the upper sections x struts supporting rods, and the lower base sections of uprights provided with flanges for attachment to the foundation. 2. The support according to claim 1, characterized in that the sections of the rack are made of twelve-sided, and the crossbar and console traverse - octagonal of a bent steel sheet. 3. The support according to claim 1, characterized in that the crossbar of the crosshead is additionally fixed to the upper sections of the struts by supporting rods. 4. The support according to claim 1, characterized in that the cross-ties, coupler and supporting rods are made of round metal.