RU100678U1 - PORTABLE EARTHING DEVICE - Google Patents

Abstract

 1. A portable grounding device comprising a grounding shoe, including a base and a contact part, a detachable rod, a lock key configured to connect a detachable rod and secure the grounding shoe between the bottom surface of the rail head and the rail mounting member to the railroad tie, while the grounding shoe and detachable the rod is connected using a grounding wire, characterized in that the base of the grounding shoe is made in the form of strips connected to the contact part by means of a hinge, on the axis of which is at least one torsion spring, which provides the location of the contact part in the plane of the base, while the contact part has a cavity for interfacing with the lock key, and on the base there is a stop fixing the lock key when the contact part is in the base plane. ! 2. The device according to claim 1, characterized in that the detachable rod is equipped with a movable bracket including a contact strip, a rod attached to the contact strip and located along the axis of the rod, a latch rigidly fixed in the rod, provided with an opening for accommodating the rod in it, this contact strip is pressed against the rod using a spring attached to the rod and the latch.

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 ground electrode system portable for a contact network with rail tracks (see copyright certificate SU 1791880, IPC H01R 4/66). The earthing switch consists of a clamp, a grounding descent, a conductive plate and a device for fixing it on a rail made in the form of a rod. At the ends of the rod, the main and additional shoes with retractable stops for interaction with the rails are installed. The bar is adjustable in length. The main shoe is mounted on the rod pivotally with the possibility of rotation in the horizontal plane. The conductive plate is made in the form of a two-shouldered lever fixed to the rod by means of an insulated hinge. One end of the conductive plate is mounted on the rail. The adjustment of the pressing of the plate to the rail is carried out by the adjusting spring clip.

However, when grounding the rail contact rails, this tool creates an obstacle to the passage of railway transport.

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 split rod (see copyright certificate SU 166940, IPC H01R 4/64). The portable earthing shoe consists of a hook with an internal thread and a pin connected at one end to the hook thread and at the other end with expandable and detachable cones. To fix the shoe on the sole of the rail and connect the rod, a locking key is used, made in the form of a coupling mechanically connected to the stud of the grounding shoe, while the key can be removed from the shoe only after it is secured to the sole of the rail.

The specified device does not interfere with the movement of railway transport, however, for its installation it is necessary to carry out labor-intensive work related to the removal of soil from under the rail at the installation site.

Closest to the claimed technical solution is a portable grounding device containing a grounding shoe, a grounding cable and a detachable rod connected by a lock key (see copyright certificate SU 158315, IPC H01R 4/64). The shoe consists of a base and a contact part connected to the base by means of coil springs. Both the contact part and the base are equipped with two side handles, made in the form of a bracket, when closed, the shoe is wound under the rail mounting crutch, and the contact part rests against the rail head. A sleeve with nuts is fixed on the contact part for connection with a grounding cable. One of the base handles is used as a locking key, removed after installing the shoe on the rail and used for the subsequent opening of the ground rod.

The disadvantage of the prototype is the need for great efforts to compress the springs and install the device in working position, while there is no possibility of using the device on rails of various sizes with various elements of the rail to the railroad tie.

The objective of the proposed solution is to improve the operational characteristics of the grounding device, in particular, to ensure unification for use for various sizes of sleepers and rail.

The technical result consists in reducing the installation time of the grounding device, increasing the reliability of contact with the rail.

The specified technical result is achieved by the fact that a portable grounding device comprising a grounding shoe, including a base and a contact part, a split rod, a locking key made with the possibility of connecting a split rod and fixing the grounding shoe between the bottom surface of the rail head and the rail fastening element to the railroad tie, when the grounding shoe and the detachable rod are connected using the grounding wire, according to the decision, the base of the grounding shoe is made in the form of a strip, connected connected with 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 lock key, and on the base there is a stop fixing the lock key when the contact part is located in the base plane. The detachable rod is provided with a movable bracket including a contact strip, a rod attached to the contact strip and located along the axis of the rod, a latch rigidly fixed in the rod, provided with an opening for receiving the rod in it, while the contact strip is pressed against the rod by means of a spring attached to rod and retainer.

The inventive utility model is illustrated by drawings, where in Fig. 1 - the upper part of the collector rod is shown, in Fig. 2 - a movable bracket, in Fig. 3 - an elbow, in Fig. 4 - a key, in Fig. 5 - a grounding shoe, general view , Fig.6 is a grounding shoe, side view, Fig.7 is a grounding shoe, top view, Fig.8 is a grounding shoe, front view.

The positions in the drawings indicate:

1 - the upper part of the rod;

2 - the lower part of the bar;

3 - movable bracket;

4 - contact strip;

5 - horizontal section of the contact strip;

6 - vertical section of the contact strip;

7 - cylinder;

8 - a core;

9 - a nut;

10 - probe;

eleven -  clamp;

12 - groove;

13 -  hole; fourteen -  contact emphasis; fifteen -  compression spring;

16 - grounding wire;

17 - the knee;

18 - cheek;

19 - the central section of the cheek;

20 - side section of the cheek;

21 -  hole; 22 -  rotary axis;

23 - a lock key;

24 - pen;

25 -  axis; 26 -  pin; 27 -  rotation limiter;

28 - grounding shoe;

29 - contact part;

30 - cavity;

31 - neckline;

32 - site;

33 - hinge;

34 - torsion spring;

35 - base;

36 - emphasis.

The portable grounding device comprises a detachable rod consisting of upper 1 and lower 2 parts. The upper part of the rod is conductive and is a metal (aluminum) pipe with a movable bracket 3, mounted on the upper end. The movable bracket comprises a contact strip 4 made with horizontal 5 and vertical 6 sections, a cylinder 7 attached to the horizontal section 5 of the contact strip 4, for example, by welding, while the axis of the cylinder 7 is perpendicular to the vertical section 6 of the contact strip. A through hole is made in the middle part of the cylinder 7 and in the corresponding part of the contact strip 4, in which a rod 8 is placed, which is rigidly attached to the contact strip 4 by means of a nut 9 screwed onto the upper end of the rod protruding beyond the contact strip. A probe 10 is attached to the upper end of the rod using an additional nut 9, which is a piece of thin copper wire. The movable bracket 3 contains a latch 11, rigidly fixed inside the upper part of the metal pipe and made in the form of a cylinder with an axial hole designed for placement with the possibility of moving the rod 8 in it, and a groove 12 on the upper end surface designed to accommodate the cylinder. A radial hole 13 is made on the side surface of the latch under the groove, the axis of which is aligned with the groove 12, while the contact stop 14 is located in the hole, passing through the hole in the upper part of the split rod (metal pipe). The latch 11 is pressed against the horizontal section 5 of the contact strip 4 by means of a compression spring 15 located on the rod under the latch and preloaded with two nuts 9 screwed onto the lower end of the rod 8.

The lower part of the rod 2 is made of current-insulating material (textolite) and connected to the upper part 1 using an elbow 17 consisting of four identical cheeks 18. The cheek is made in the form of a metal plate containing a central semicircular section 19 and two lateral flat sections 20 located in two parallel planes. The cheeks are pairwise connected to each other, while the central sections of one pair of cheeks are rigidly connected to the upper part of the rod, and the central sections of the other pair of cheeks are rigidly connected to the lower part of the rod. The end of the ground wire 16 is attached to one of the cheeks connected to the upper part of the rod, the other end of the ground wire is connected to the ground shoe 28. Holes 21 are made in the side sections of the cheeks, while the holes located on one side of the central sections have a swivel the axis 22, which is a tube flared from two sides, and the holes located on the other side have a shape corresponding to the profile of the axis 25 of the key 23.

The key 23 contains a handle 24 made in the form of a rectangular plate with beveled corners, as well as an axis 25 attached to the edge of the handle perpendicular to its plane. Two pins 26 are fixed on the key axis, and a rotation limiter 27 on the handle.

The portable grounding device comprises a grounding shoe 28 including a base 35 and a contact part 29. The contact part is made in the form of a cylinder with a radius equal to the radius of curvature at the base of the rail head, and cavities 30 are made from the end sides of the contact part to reduce the mass of the device. A cut-out 31 is made in the cavity of the contact part from the location of the key 23, while the axis 25 of the key 23 is located in the cavity 30, and the pins are in the cut-out 31. A flat rectangular platform 32 is fixed to the contact part 29, which is intended to be connected to the grounding wire 16, while the platform 32 is pivotally connected to the base 35, made in the form of a flat bar. On the same axis with the hinge 33 connecting the platform 32 and the bar 35, two torsion springs 34 are located on both sides of it, the forces of which are applied to the lower surfaces of the platform and the bar, as a result of which they are located in the same plane with the possibility of rotation relative to each other relative to the axis hinge. On the side of the base 35, a L-shaped stop 36 is attached, adjacent to the lower edge of the handle 24 of the key 23, the axis 25 of which is located in the cavity 30 of the contact part 29, and preventing the key from being removed from the grounding shoe before installation.

The principle of operation of the inventive portable grounding device is that the grounding shoe is installed in the spacer between the fastening element of the rail to the railroad tie and the lower surface of the rail head. First, a ground shoe 28 is installed between the rail-to-rail fastener and the bottom surface of the rail head from the outside so that the ground wire 16 does not interfere with the movement of the railway transport. To do this, rest the base 35 in the fastening element (crutch, or the anchor head in the tie) from the side facing the rail, and pull the handle 24 of the key 23 upwards, overcoming the efforts of the springs 34. In this case, the platform 32 with the contact part 29 fixed to it rotates around the axis of the hinge 33 relative to the plane of the strip of the base 35 and falls below the level of the lower surface of the rail head. The contact part 29 is brought under the rail head and the handle 24 of the key 23 is released, the torsion spring 34 creates a force sufficient to tightly press the contact part 29 against the rail. The base 35 and the contact portion 29 of the grounding shoe 28 remain at an angle of less than 180 ° to each other, while the handle 24 of the key 23 is disengaged from the focus 36, the axis 25 of the key is freely removed from the cavity 30.

The key 23 freed from the grounding shoe 28 is used to assemble the split rod. The upper 1 and lower 2 parts of the rod are arranged one above the other, rotating relative to the rotary axis 22 of the knee, and then the axis 25 of the key 23 is placed in opposite empty holes 21 of the cheeks 18. The axis of the key with pins 26 freely enters the holes when the handle 24 is located parallel to the rod in the direction of the upper part 1 until the pins are located on opposite sides of the elbow 17. Under the force of gravity, the key 23 rotates, while the pins 26 on the axis 25 rotate relative to the holes 21 in the elbow 17, blocking the movement of the key lengthwise axis 25 and its accidental loss. After assembling the rod, bring the probe 10 to the contact wire, checking for voltage and, in the absence of it, put on the contact strip 4 of the movable bracket 3 on the contact wire. Then they pull the rod downward, while the spring 15 on the rod is compressed, and the cylinder 7 leaves the groove 12 of the latch 11. Then the rod is rotated 180 °, as a result of which the contact stop 14 moves under the contact wire and presses it tightly onto the contact strip 4, when the cylinder 7 again enters the groove 12. This design ensures the retention of the rod on the contact wire without loss of contact wire-rail during oscillations of the rod.

Claims (2)

1. A portable grounding device comprising a grounding shoe, including a base and a contact part, a detachable rod, a lock key configured to connect a detachable rod and secure the grounding shoe between the bottom surface of the rail head and the rail mounting member to the railroad tie, while the grounding shoe and detachable the rod is connected using a grounding wire, characterized in that the base of the grounding shoe is made in the form of strips connected to the contact part by means of a hinge, on the axis of which is at least one torsion spring, which provides the location of the contact part in the plane of the base, while the contact part has a cavity for interfacing with the lock key, and on the base there is a stop fixing the lock key when the contact part is in the base plane. 2. The device according to claim 1, characterized in that the detachable rod is equipped with a movable bracket including a contact strip, a rod attached to the contact strip and located along the axis of the rod, a latch rigidly fixed in the rod, provided with an opening for placement of the rod in it, this contact strip is pressed against the rod using a spring attached to the rod and the latch.