RU2701601C1 - Device for mounting the transposition geometry of wires of an air high-voltage power supply line with high symmetry of running electrical parameters of the line, which is in conditions of intense action of the electromagnetic field of the overhead system of railways, electrified on alternating current - Google Patents

Abstract

FIELD: power supply.

SUBSTANCE: invention relates to power supply lines. Device for mounting transposition geometry of wires of air high-voltage power supply line electrified on AC contains torsional machine on which supply coils with wires are sequentially located and which has the possibility of performing rotational movement. Torsion machine comprises drums with wires, axes of which are spaced apart in space by 120°, and guides for transportation of wires are spaced along circumference of support rings. Torsion machine is part of mechanized complex, based on movable mobile platform with manipulator. Platform with the complex is made with possibility of movement along spans of the line under construction, at the same time the torsion machine itself, by means of rotary movement, has the possibility of turning due to its movable part by 60° during movement of entire platform on one span between supports.

EFFECT: technical result consists in increasing labour productivity during construction of power supply line.

1 cl, 3 dwg

Description

"The technical field to which the invention relates"

The presented invention is a device that allows for the automation and complex mechanization of the construction of high-voltage overhead power lines (we are talking about lines with increased symmetry of linear electrical parameters and which are under intense exposure to the electromagnetic field of the contact network of railways electrified with alternating current).

"Prior art"

For systems with insulated neutral (VL STsB) and for a high-voltage wire system of longitudinal power supply, compatible with the electromagnetic field of the contact network of electric railways, electrified by alternating current (RPZP) (patent No. 2286891 2006), a solution to the problem of reducing the asymmetry of the voltage supply triangle consumers from the electromagnetic influence of the contact network, is directly dependent on the geometry of the location of the wires of overhead lines.

If, influencing the electromagnetic field, it will have the same effect on all three wires of the line, then in the wires - phases, the levels of induced voltages will equalize. Moreover, this is both from the magnetic and electric components of the electromagnetic field. Then, the potential differences, in phases in the line wires from the effects of the electromagnetic field, will tend to zero. At the same time, only the supply voltage remains at the consumer. This effect is achieved by creating the same distance from each of the wires of the line to the equivalent influence of the contact network. The transposition of overhead line wires, through alignment of inductances and capacitances of individual phases of the wires, should reduce the electromagnetic effect on neighboring parallel overhead lines and, ultimately, is designed to ensure high-quality transmission of electricity to the consumer.

Transposition consists in the mutual exchange of places of wires of various phases, along the entire line.

The transposition of the wires is performed on a special transposition support or in the span (the gap between the supports), suitable for the transposition support. In the remaining spans of the line (3 km), the wires run parallel to each other, until the next transposition step. Between the steps of transposition, the electrical parameters of the wires are asymmetrical. Such a transposition of wires uses an installation technique with a cut of wires on a transposition support, usually at the end of a used drum with a wire.

Technology for mounting wires on transposition supports {Technical library of GOSTs, Rules and Norms. Collection E23, Issue 3 § E 23-3-21) adopted by the authors as a prototype.

For DZPZ, the use of installation technology according to (§ E 23-3-21) is unacceptable. In the DPSA system, transposition is used with increased symmetry of the linear electrical parameters of the line, and since its wires are mounted directly on the contact supports, they are exposed to the intense influence of the electromagnetic field of the contact network of railways (patent No. 2460654 dated January 12, 2011). This transposition uses a six-step method, which provides for the rotation of the wires by 60 °, around the circumference, on each support (in this case, each support performs the function of a transposition support).

The use of a six-step rotation of the wires by 60 °, in a circle on each support, slightly increases the distance between the wires at the reference points relative to the middle of the span (only by a factor of 1.15). This allows you to use standardized designs of brackets and supports, thereby, firstly, to maintain standardized dimensions and unload the support to standard load values, and secondly, to perform a transpositional step on each span, without gaps. In addition, the location of the brackets on one side of the support (contact network) allows you to create a device for mounting wires in the form of a single, mobile mechanized complex.

The installation device for the six-step transpositional geometry of the wires should have three degrees of freedom. This is necessary so that during the installation of wires, at each step, the following actions could be performed:

1) The installation device must be mobile and able to move along the entire construction route;

2) In the process of the above movement, the individual elements of the device must make rotational movements;

3) The rotating elements of the device, brought together in a block must, in turn, perform a rotational action, namely, - rotate 60 ° when moving one span between the supports;

4) After stopping the mounting device at the mounting support, the device must be moved vertically — lifting the wires to the bracket insulators.

The further movement of the mounting device is a continuous repetition of all the above actions.

An analysis of the existing devices that perform similar actions has revealed that in the manufacture of cables various twisting machines are used: cage, cigar-type, disk and litsekrutilnye (Fundamentals of cable technology. VA Privezentsev et al. - M .; Energy, 1967.) The closest principle to the new installation device proposed by the authors is used in cigar type machines. We accept the device of these machines as an analog.

In analog, for twisting cable cores, rotational motion and sequential arrangement of feed coils are used.

"Disclosure of inventions"

The purpose of the invention is a device for mounting the transposition geometry of the wires of the overhead high-voltage power supply line with increased symmetry of the linear electrical parameters of the line, which is under intense exposure to the electromagnetic field of the contact network of railways electrified by alternating current, using complex mechanization and automation, which helps to increase labor productivity in construction lines. Technologically, it creates the possibility of continuous, seamless and simultaneous installation of three wires of a six-step transposition on each support, along the entire length of the overhead high-voltage line. This installation technology can significantly reduce the time for construction work.

The installation device proposed by the authors is a mechanized complex based on a mobile platform that moves along a construction road. The complex consists of a manipulator that performs vertical movement of the wires for mounting the wires on the insulators of the support and a twisting machine that feeds wires from the bays and at the same time rotates (turning 60 when the platform moves one span between the supports).

The installation device is intended for the transposition geometry of the wires of the overhead high-voltage power supply line with increased symmetry of the linear electrical parameters of the line, which is under intense exposure to the electromagnetic field of the contact network of railways electrified by alternating current.

The device allows you to use the technology of continuous, seamless and simultaneous installation of all three wires of the six step transposition of the air high-voltage line on each support along its entire length. Moreover, the used torsion machine has spaced centers of drums with wires. These axes of the drums and guides for transporting wires are spaced around the circumference of the support rings at an angle of 120 °. This twisting machine is an integral part of the mechanized complex based on a mobile moving platform with a manipulator, which performs vertical movement of wires for mounting on insulators of support consoles. In general, the platform with the complex is made with the ability to move along the spans of the line under construction. At the same time, the torsion machine itself, by means of rotational movement, has the ability to make a rotation due to its movable part by 60 °, which happens when the entire platform moves one span between the supports when installing transposition air wires.

"Brief Description of the Drawings"

In FIG. 1 shows the stationary part of a twisting machine according to the present invention.

In FIG. 2 and FIG. 3 shows the movable part of a twisting machine according to the present invention.

"Implementation of the invention"

The twisting machine consists of a movable (Fig. 2, 3.) and fixed parts (Fig. 1.). On (Fig. 3.) schematically shows the location of the axial supports of the bays at an angle of 120 ° in space and guide wires around the circumference of the support rings.

The fixed part of the structure is mounted on a mobile platform and consists of a frame 1 with support racks 2, which are equipped with rotating guide rollers 3. The movable part of the structure is fixed in its fixed part on the central support 4, through the center 5 located on the axis of the entire structure 6 and is driven rotation driven 7.

The movable part of the structure is mounted, in a fixed frame, on rotating guide rollers 3, which are mounted on the platform and consist of (assembled in a single structure using fastening plates 9), four support rings 8. The rings are rigid supports for, centers of rotation of 10 bays with mounted wires spaced 120 ° in space. The tubular guides 11 are also spaced 120 ° in the movable part of the structure, around the circumference of the rings 8. The wires, through the tubular guides, are mounted using the manipulator on the insulators of the support consoles. To eliminate possible damage to the wires during transportation to the place of installation, the inlet and outlet openings of the tubular guides are equipped with rotating pulleys 12.

The installation of coils with wires in the centers 10 is carried out by a lifting manipulator, in a sequential turn, after each installed coils, the movable part of the structure at an angle of 120 °.

The manipulator mounted on a common platform is used for vertical movement of the device, both for loading and for the sequential lifting of the wires of each bay to the places of their attachment to the insulators of the consoles. The consecutive rise of the wires starts from the upper far (in relation to the equipment), the place of attachment of the wire. Last fastens the lower, near wire.

After preliminary fixing the wires, the tool moves to the next support, while tensioning the suspended wires and turning its movable part through an angle of 60 °. The tension of the wires is due to a slight braking of the coils, in the process of movement of the platform to the next support. On the next support, the process is repeated. This technology of wire installation can significantly increase productivity and reduce the cost of finished products.

A topical feature of the use of the device is the possibility of continuous, seamless and simultaneous installation of three wires of a six-step transposition at once on each support, along the entire length of the overhead high-voltage line.

Claims (1)

A device for mounting the transposition geometry of the wires of an overhead high-voltage power supply line with increased symmetry of linear electrical parameters of the line, which is under intense exposure to the electromagnetic field of the contact network of railways electrified by alternating current, which contains: a torsion machine on which the supply coils with wires are arranged in series and which has the ability to rotate, characterized in that the device is used for continuous washing, continuous and simultaneous installation of all three wires of a six-step transposition of an air high-voltage line on each support along its entire length, and a twisting machine used, in the centers of which are installed drums with wires, the axes of which are spaced 120 ° apart in space, and guides for transporting wires spaced around the circumference of the support rings; this torsion machine is an integral part of a mechanized complex based on a mobile moving platform with a manipulator that performs vertical movement of wires for mounting on insulators of support consoles; as a whole, the platform with the complex is capable of moving along the spans of the line under construction, while the torsion machine itself can rotate by 60 ° due to its rotational movement, which happens when the entire platform moves one span between the supports, installation of transposition air wires.

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