RU2247041C2 - Connector - Google Patents

Abstract

FIELD: electrified railways.

SUBSTANCE: invention relates to connectors of multifilament wires used in contact system of electrified railway. Proposed connector has pads with chutes for wires provided with semiround projections and also bolted joints. Projections of chute of one pad are displaced relative to projections of opposite chute of other pad through 0.52-0.6 D_w where D_w is diameter of wire. Projections of chutes have width of 0.4-0.5 D_w and height of 0.2-0.25 D_w. Proposed connector, as to its service characteristics, meets requirements to mechanical and electric parameters.

EFFECT: increased economy characteristics.

2 cl, 6 dwg

Description

The invention relates to clamps for connecting stranded wires and can find application in the contact network of electrified railways or other areas of technology using nodes with multi-wire wires.

Stranded wires of the contact network are connected and / or fastened with bolt clamps of the type 048-2, 051-2, 052-1, 052-2, 053-1, 053-2, 053-3, 053-4, 053-5, 053-1-1, 053-1-2, 054, 054-1, 054-1 (KS-324), 054-2 (KS-324-1), 054-2, 054-1-1, 054- 1-2, 055, 055-1, 055-2, 055-3, 055-4, 055-1-1 (see “Catalog of fittings for the contact network of electrified railways”, Department of Electrification and Power Supply of the Ministry of Railways of the Russian Federation. - M ., “TRANSISDAT”, 2000, p. 38,43-55).

A known connecting clamp (see patent No. 2165859, class B 60 M 1/24, filing date July 21, 2000, patent holder: Porcelan A.A.), selected as a prototype.

The clamp contains dies with grooves for placing wires and bolted connections. The troughs are provided with protrusions and depressions, and the protrusions of the trough of one die are offset with respect to the protrusions of the opposing trough of the other die in a checkerboard pattern with an offset equal to 0.5 of the distance between the protrusions. The length of the protrusions of the gutters is 0.07-1.05 of the length of the cavity, and the height of the protrusions is 1.5-2.0 mm

A disadvantage of the known clamp-prototype is that the claimed design of the protrusions and depressions does not provide complete contact of the surface of the wires with the surfaces of the ditches of the dies, which leads to an increase in electrical resistance during the passage of electric current, and this in turn leads to heating of the connecting node.

The objective of the present invention is:

- the creation of clamps that, in terms of their operational characteristics, would satisfy the regulatory requirements for mechanical and electrical parameters and at the same time provide higher economic indicators.

The solution to the problem and the advantages of the claimed invention arise from the following detailed description of the clamps and an example of their specific implementation.

To solve this problem, a connecting clamp containing plates with grooves for accommodating wires having semicircular protrusions, the protrusions of the groove of one die being offset with respect to the protrusions of the opposing groove of the other die, and the bolt joints according to the invention, the protrusions of the groove of one die are offset with respect to protrusions of the opposite trough of another die at a distance of 0.52-0.6 Dpr, where Dpr is the diameter of the wire.

According to the invention, the gutter protrusions are 0.4-0.5 Dpr wide and 0.2-0.25 Dpr high.

As can be seen from the above, a hallmark of the prototype is the presence of size ratios from the diameter of the wire - Dpr. The proposed ratio of sizes to wire diameter - Dpr in the claimed technical solution is optimal and was found experimentally, based on the technological capabilities of the manufacture of clamps.

It was experimentally established that the offset of the protrusions of the groove of one die relative to the protrusions of the opposite groove of the other die by a distance L equal to 0.5-0.6 Dpr leads to an increase in the pinching of the wire with a lower compression force, providing full contact of the wire over the entire surface the grooves of the dies and at the same time the connected wires are located in the groove of the clamp with a bend along the horizontal axis of the clamp (see figure 3).

It was also found that an increase in the amount of pinching of the wire leads to the implementation of the protrusions of the gutters with a width of 0.4-0.5 Dpr and a height of 0.2-0.25 Dpr (see Figs. 4, 5).

The claimed technical solution compared with the prototype (see patent No. 2165859, class 60 M 1/24, filing date 07/21/2000, patent holder: Porzelan AA) has a new set of essential features, therefore, meets the criterion " novelty".

The above set of distinctive features and the achieved result characterize the unity of the invention, and it does not follow explicitly from the studied prior art, that is, it has an inventive step.

The claimed technical solution can be used in industry, therefore, it is industrially applicable.

The essence of the proposed technical solution is illustrated by a description of specific examples of its implementation and the accompanying drawings, where:

- figure 1 presents a General view of the connecting clamp;

- figure 2 is a section aa in figure 1;

- figure 3 - die clamp;

- figure 4 is a section bB in figure 1;

- figure 5 is a view of figure 4;

- figure 6 is a section bb in figure 4.

An example of a specific implementation.

The clamp contains two dies 1 and 2 (see figure 2), connected by bolts 3. In both dies, grooves 4 and 5 are formed (see figure 3) to accommodate stranded wires 6 and 7 (see figure 1) . In the semicircular grooves 4 and 5, semicircular protrusions 8 are made (see Figs. 3, 4, 5). The protrusions 8 are made with a height of 0.2-0.25 Dpr and a width of 0.4-0.5 Dpr, where Dpr is the diameter of the wire (see figure 5).

The protrusions 8 of the grooves 4 and 5 are located from the end surface of the die at a distance L ₂ equal to 0.5-1.0 Dpr, and between them the protrusions are located at a distance L ₁ equal to 1.0-2.5 Dpr (see Fig. 3). In this case, the protrusions of the groove of one die are offset with respect to the protrusions of the opposite groove of the other die by a distance equal to 0.52-0.6 Dpr, which provides a more secure pinching of the wires in the clamp.

The clamp is made by powder metallurgy. The dies 1 and 2 are made of iron-based powder material with additives of copper, nickel, phosphorus and carbon, and the contact surfaces of the gutters 9 and 10 (see FIGS. 2, 6) with semicircular protrusions (see FIG. 5) are made of powder copper or copper alloy powder. The manufacture of clamps by powder metallurgy provides higher economic performance.

As experimental studies have shown, clamps made according to the proposed technical solution, in terms of their operational characteristics, provide regulatory requirements for mechanical and electrical parameters.

According to the results of positive bench and operational tests, the proposed clamps are recommended for implementation in production.

Thus, the proposed technical solution allows to obtain clamps for stranded wires of the contact network, which in their performance characteristics provide regulatory requirements for mechanical and electrical parameters and have, at the same time, higher economic indicators due to their manufacture by powder metallurgy.

Claims (2)

1. A connecting clamp comprising dies with grooves for accommodating wires having semicircular protrusions, the protrusions of the trough of one die being offset with respect to the protrusions of the opposing trough of the other die, and bolt connections, characterized in that the protrusions of the trough of one die are offset with respect to the protrusions of the opposite the troughs of another die at a distance of 0.52-0.6 Dpr, where Dpr is the diameter of the wire. 2. The connecting clamp according to claim 1, characterized in that the protrusions of the gutters are made of a width of 0.4-0.5 Dpr and a height of 0.2-0.25 Dpr.

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