RU183311U1 - Portable earthing device - Google Patents

Abstract

The utility model relates to conductive connection devices and is intended to provide grounding of the contact network of direct and alternating current of electrified railways during repair work. The device comprises a grounding shoe with a contact part, in which a cavity is made for interfacing with a locking key, a detachable rod, consisting of a lower, dielectric, part and an upper, conductive part, connected by a grounding wire to a grounding shoe, a locking element that fixes in the working the position of the dielectric and conductive parts of the detachable rod, in which cavities are made for interfacing with a lock key. The cavity in the contact part of the grounding shoe for interfacing and the cavity in the locking element for interfacing with the lock key are made in terms of an arbitrary irregular and / or regular geometric shape. EFFECT: increased reliability of fastening of a detachable rod due to exclusion of assembly and disassembly of the rod with the help of foreign objects. 5 cp f-ly, 6 ill.

Description

The utility model relates to conductive connection devices and is intended to provide grounding of the contact network of direct and alternating current of electrified railways during repair work.

Known portable grounding for the contact network of electric railways, consisting of a grounding shoe covering the sole of the rail, a grounding cable and a detachable rod (USSR author's certificate No. 166940, IPC H01R 04/64, H01R 04/66, published on 12.12.1964) at the same time, a locking key is used, which serves to fix the grounding shoe on the sole of the rail and connect the rod. The portable grounding shoe consists of a hook with an internal thread with a pin connected at one end to the hook thread and at the other end with expandable and detachable cones. The locking key is made in the form of a coupling mechanically connected to the coupling pin of the grounding shoe, while the key can be removed from it only after fixing the grounding shoe on the sole of the running rail.

A disadvantage of the known portable grounding for the contact network of electric railways is the difficulty of access to the rail sole, therefore, to install it on the running rail, laborious cleaning of the bottom of the running rail from crushed stone is required, which reduces the reliability of the connection of the grounding shoe covering the bottom of the rail and the safety of working on the contact network.

A grounding rod for a contact network is known (see USSR author's certificate No. 1088965, IPC В60М 01/28, publ. 04/30/1984), comprising a housing on which a hook for hanging is connected, connected to the grounding shoe, and a control pin connected through resistors with voltage control elements, while it is equipped with a solenoid located between the resistor and the grounding shoe, connected to the core of the last latch, pivotally locked in the middle part of the housing with a blocking flap, at one end

interacting with the hanging hook, another associated with the return spring and interacting with the said latch, mounted on the latter, connected with one end of the pin and installed with the possibility of joint with the vertical movement pin in the housing locking element, interacting with the latter and the lower latches fixed to the housing wall and the upper position of the locking element mounted respectively on the control pin and on the housing by movable and fixed contacts included in solenoid power circuit.

A disadvantage of the known grounding rod is that during operation the installation sequence of the rod nodes is not provided and the device does not have sufficient mechanical strength, which reduces the safety of work on the contact network of railways.

A portable earthing switch is known for a contact network with rail tracks (see USSR author's certificate No. 1791880, IPC H01R 04/66, published January 30, 1993), containing a clamp for a contact wire connected in series with each other, an earthing switch and a device for fixing the ground electrode to the rails, which includes a rod and mounted on its ends of the main and additional shoes for installation on rails, while the ground electrode is equipped with a conductive plate connected to the grounding descent, made in the form of a two-arm lever, closed replicated on the rod by means of an additionally introduced insulated hinge with the possibility of rotation in the vertical plane and pressed against the rail at one end by means of an additionally introduced insulated adjustable spring clip located on the other end of the lever, while the main shoe is pivotally mounted on the rod with the possibility of rotation in the horizontal plane.

A disadvantage of the known portable ground electrode system is that it completely excludes any work on the contact network under voltage, which reduces the safety of work on the contact network.

A portable grounding device is known, consisting of a grounding shoe, a grounding cable, a detachable rod connected by a locking key (see USSR author's certificate No. 158315, IPC Н02Н, В61М, publ. 10/19/1963), while the shoe consists of a base with two side handles, made in the form of a bracket and a contact part connected with the base by means of spiral springs and also equipped with two side handles, when they are locked with the base handles, the shoe is brought into the base under the crutch of the rail fastening and ktnoy part rests on the rail head. As a locking key, one of the base handles is used, which can be removed only after installing the shoe on the rail.

A disadvantage of the known portable grounding device is the need for great efforts to compress the springs and install the device in working position with the required electrical contact with the rail, which reduces the safety of work on the contact network of electrified railways.

The closest in technical essence to the proposed utility model is a portable grounding device (see RF patent for utility model No. 100678, IPC H01R 04/64, publ. 12/20/2010), containing a grounding shoe, including a base and a contact part, detachable a rod, a locking key made with the possibility of connecting a detachable rod and fixing the grounding shoe between the lower surface of the rail head and the fastening element of the rail to the railroad tie, while the grounding shoe and the detachable rod are connected by grounding its wires, the base of the grounding shoe is made in the form of a strip connected to the contact part by means of a hinge, on the axis of which at least one torsion spring is located, which ensures the location of the contact part in the plane of the base, while in the contact part there is a cavity for interfacing with a locking key, and on the base there is a stop fixing the locking key when the contact part is located in the base plane.

A disadvantage of the known portable grounding device is the lack of protection against the possibility of unauthorized assembly and disassembly of the rod using foreign objects, which reduces the safety of work on the contact network of electrified railways.

The objective of this utility model is to increase the safety of work on the contact network of electrified railways.

The technical result achieved in solving this problem is to increase the reliability of securing the split rod by eliminating its unauthorized assembly and disassembly.

The specified technical result is achieved by the fact that in a portable grounding device containing a grounding shoe with a contact part, in which a cavity for interfacing with a blocking key is made, a detachable rod consisting of a lower, dielectric part and an upper, conductive part connected by a grounding wires with an earthing shoe, a locking element that fixes in the working position the dielectric and conductive parts of the detachable rod, in which cavities are made for interfacing with the locking lyuchom, according to the utility model, the shape and size of the cavity in the ground contact portion of the shoe to mate with the locking key coincide with the shape and size of the cavities in the split locking member rod.

It is advisable that the cavity was made in terms of the same shape.

Preferably, the cavities were made in terms of irregular geometric shape.

It is advisable that the cavity was made in terms of the correct geometric shape.

The execution of the cavity in the contact part of the grounding shoe in terms of irregular or regular, geometric shape eliminates the possibility of unauthorized assembly of the split rod with the help of foreign objects, i.e. provides safe work on the contact network of railways.

The execution of cavities in the locking element in terms of irregular or regular geometric shape also protects the portable grounding device from the possibility of unauthorized assembly of the split rod with the help of foreign objects, increasing the safety of work on the contact network of railways.

When working on the contact network of railways with a voltage of 27.5 kV, the main and prerequisite is the inability to remove the lock key without installing the grounding shoe on the rail, the alternate installation of portable grounding rod assemblies, namely:

1) installation of a ground shoe rail;

2) installation of detachable bar-pin wire.

The utility model is illustrated by drawings, where in FIG. 1 shows a grounding shoe with a key inserted, partial section; in FIG. 2 - grounding shoe without a lock key, view A in FIG. one; in FIG. 3 - lock key; figure 4 - fracture node (locking element) of a detachable rod with an inserted locking key; in FIG. 5 - fracture assembly (locking element) of a detachable rod with an inserted locking key, the upper part of the key is not shown; in FIG. 6 is a fracture assembly of a split rod, view BB in FIG. 4. The positions in the drawings indicate the following: 1 - the base of the grounding shoe; 2 - contact part of the grounding shoe; 3 - a cavity in the contact part 2 of the grounding shoe; 4 - lower dielectric part of the split rod; 5 - upper conductive part of the split rod; 6 - upper cheek fracture of the locking element; 7 - lower cheek fracture of the locking element; 8 - cavities made in the upper 6 and lower 7 cheeks of a fracture of the locking element; 9 - a fixing spring mounted on the locking element; 10 - handle lock key; 11 - a beard of a blocking key.

A portable grounding device for a contact network of electrified railroads contains a grounding shoe (Fig. 1 and 2), including a base 1 and a contact part 2, in which a cavity 3 of irregular / regular shape for interfacing with a lock key (Fig. 3), a detachable rod (Fig. 4 and 5), consisting of the lower dielectric part 4 and the upper conductive part 5 with a movable bracket and a probe at the end (not shown), a ground wire (not shown), a locking element. The lower dielectric part 4 of the detachable rod is made of insulating material (for example, fiberglass) and connected to the upper conductive part 5 using a locking element (Fig. 4-6). The locking element (the fracture assembly of the detachable rod) consists of the upper cheek of the fracture 6 and the lower cheek of the fracture 7, in which cavities 8 are made of irregular / regular shape for interfacing with the locking key. An end of a ground wire (not shown) is attached to the upper conductive part 5 of the split rod. The other end of the ground wire is connected to the contact portion 2 of the ground shoe. A locking spring 9 is installed on the locking element (fracture assembly of the split rod).

The locking key contains a handle 10, made in the form of a curved - shaped rectangular plate with beveled corners and a beard 11, attached, for example, by welding, to the edge of the handle 10 perpendicular to its plane (Fig. 1, 3-6). On the beard 11 of the lock key, two recesses are made (Figs. 1 and 3). This shape of the handle 10 of the lock key eliminates injuries to the operator’s hands, increasing the safety of work on the railway contact network.

The following embodiments of a portable grounding device are possible, for example:

- the cavity 3 in the contact part 2 of the grounding shoe for interfacing with the locking key is made in terms of irregular geometric shape:

- the cavity 8 in the locking element for interfacing with the lock key is made in terms of irregular geometric shape;

- the cavity 3 in the contact part 2 of the grounding shoe for interfacing with the lock key is made in terms of the correct geometric shape;

- the cavity 8 in the locking element for interfacing with a lock key is made in terms of a regular geometric shape;

- the shape of the cavity 3 in the contact part 2 of the grounding shoe and the shape of the cavities 8 in the locking element are the same;

- the size of the cavity 3 in the contact part 2 of the grounding shoe and the dimensions of the cavities 8 in the locking element are the same.

In the example of a private embodiment of the locking key, the cavity 3 in the contact part 2 of the grounding shoe for interfacing with the locking key and the cavity 8 in the locking element of the detachable rod for interfacing with the locking key are made in the same rectangular shape (Fig. 1-6).

When operating the claimed device, the most preferred is the option in which the shape and size of the cavity 3 in the contact part 2 of the grounding shoe coincide with the shape and size of the cavities 8 in the locking element of the split rod. This allows, eliminating unauthorized assembly or disassembly of the split bar, to increase the safety of work on the contact network of electrified railways.

A portable grounding device for a contact network of electrified railways works as follows.

When assembling the device, a grounding shoe is first installed between the rail-to-sleeper mounting member and the bottom surface of the rail head (not shown) from the outside.

Start the contact part 2 of the grounding shoe under the rail head and use a lock key to create a force sufficient to tightly contact the contact part 2 with the rail. Then remove the lock key from the locking mechanism of the cavity 3 in the contact part 2 of the grounding shoe.

Since the shape and size of the cavity 3 in the contact part 3 of the grounding shoe, as well as the shape and size of the cavities 8 made in the upper cheek of the fracture 6 and the lower cheek of the fracture 7 of the locking element are the same, the same locking key is also used to assemble the split rod. The upper 5 and lower 4 parts of the split rod are located one above the other, with the help of the locking element they are fixed in the working position. Then, the fixing spring 9 is pulled up, the locking key is inserted into the cavity 8, and the fixing spring 9 is released.

After assembling the detachable rod, bring the probe to the contact wire (not shown), checking for voltage and, in the absence of it, put a movable bracket on the contact wire.

Dismantling the device is carried out in the reverse order.

Thus, the use of the proposed portable grounding device to provide grounding of the contact network of direct and alternating current of electrified railways will improve the safety of repair work on the contact network of railways.

Claims (4)

1. A portable grounding device comprising a grounding shoe with a contact part, in which a cavity for interfacing with a blocking key is made, a detachable rod consisting of a lower, dielectric, part and an upper, conductive part connected by means of a grounding wire to a grounding shoe; an element fixing in the working position the dielectric and conductive parts of the detachable rod, in which the cavities for interfacing with the lock key are made, characterized in that the shape and size of the cavity in ontaktnoy grounding shoe portion for mating with the locking key coincide with the shape and size of the cavities in the split locking member rod. 2. The device according to p. 1, characterized in that the cavity is made in terms of the same shape. 3. The device according to p. 1, characterized in that the cavity is made in terms of irregular geometric shape. 4. The device according to p. 1, characterized in that the cavity is made in terms of the correct geometric shape.

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