RU201641U1 - Removable insulating tower for work on railway overhead lines - Google Patents

Abstract

The utility model relates to the field of electrified railway transport, namely to devices for performing work on the railway contact network and protecting personnel performing work from electric shock caused by operating or induced voltage. The technical result is achieved by creating a removable insulating tower for work on the contact network of the railway, containing the working platform and the frame connected to it by means of a ladder bowstring, to which the braces of the steps and struts are fixed at an angle of 20 to 80 degrees.

Description

The utility model relates to the field of electrified railway transport, namely to devices for performing work on the railway contact network and protecting personnel performing the work from electric shock caused by operating or induced voltage.

When performing work on the contact network of electrified railways, from the point of view of technical means of ensuring electrical safety, insulating towers, removable for work on the contact network of the railway, (hereinafter referred to as towers) are considered as the main electrical protective means providing electrical isolation of the workplace. Currently, towers are manufactured in accordance with the requirements of GOST R 56622-2015 “Removable insulating towers for operation on the railway contact network. Technical conditions ". According to the requirements of this national standard, towers of an outdated design are produced with an arrangement of stairs and braces in accordance with Figure 1 of GOST R 56622-2015. Due to the lack of requirements for ladders for a tower, towers of various designs are used on the railway network, both made of wood and fiberglass. In this case, the profile of the section of the tower and the size of the section are chosen arbitrarily, which negatively affects the rigidity of the structure as a whole and in the increased weight of the tower.

From the point of view of labor protection, a mandatory requirement for the production of work from the tower is the rigidity of the structure to ensure its stability against overturning on the railroad rails and the minimum deviation from the vertical axis of the tower. The low weight of the tower plays an important role in preserving the health of the electricians of the railway contact network, which allows four workers to carry the tower.

From the point of view of train traffic safety, a mandatory requirement for the tower is also its rigidity and the minimum deviation of the working platform from its axis, since the zigzags of the contact wire are adjusted relative to the marks on the working platform. If the zigzags are incorrectly adjusted, the pantograph of the rolling stock breaks, the contact wire breaks and an electric shock occurs. All this leads to train delays and damages the railways.

There are three main structures of a tower with the same arrangement of stairs and braces, differing in the material for manufacturing the insulating parts of the tower stairs:

- from a wooden rectangular profile;

- from fiberglass pipes;

- from fiberglass profiles.

The utility model makes it possible to increase the rigidity and stability of the tower and to reduce the weight of the tower.

State of the art

Known insulating towers are removable, consisting of wooden and fiberglass stairs, braces and a metal frame and an upper shunting belt with a working platform:

1. GOST R 56622-2015 “Removable insulating towers for work on the railway contact network. Specifications "http://docs.cntd.ru/document/1200124582

2.https: //lokomo.ru/elektrosnabzhenie/rabota-na-semnyh-izoliruyuschih-vyshkah.html

The disadvantage of all known tower devices is the lack of a sufficient number of connections between the electrical insulating elements of the tower, which reduces the torsional rigidity of the structure and vertical stability, which leads to an imbalance in the tower's center of gravity and increases the likelihood of overturning from the rails. In the case of the wooden construction of the tower ladders, they dry out and crack, which leads to a significant deviation from the vertical axis of the tower and can cause strong longitudinal and lateral swinging of the tower when the electricians of the contact network are on the working platform.

The next disadvantage of all towers is their high center of gravity, which reduces tower stability and increases the likelihood of overturning with insignificant lateral forces.

A significant disadvantage of all towers is their high weight, which causes such health problems for electricians as rheumatism, protrusion and hernia of the spine.

A significant drawback of all towers is the design of their frames, on which the wheels are located. When moving the tower, the electricians of the contact network damage the shins, which is caused by the incorrect geometry of the lower side chord of the frame.

Thus, the disadvantages of all towers negatively affect the labor protection of electricians and the safety of train traffic.

The technical problem solved by the claimed utility model is to overcome the technical drawbacks inherent in analogs, which leads to the need for cardinal improvements in the design of removable insulating towers for operation on the railway contact network.

Disclosure of essence

The technical result of the claimed useful model is to increase rigidity, stability of the tower, reduce the weight of the tower and increase the safety of work.

The technical result is achieved by creating a detachable insulating tower for operation on the railway contact network, containing a working platform and a frame associated with it using a ladder bowstring, to which the braces of the steps and spacers are fixed at an angle of 20 to 80 degrees.

Due to the aluminum alloy work platform, the center of gravity of the tower is reduced, which increases its resistance to overturning and reduces the weight of the tower and increases the safety of work.

Due to the struts located at an angle of 20 to 80 degrees to the bowstring (1) of the stairs, an increase in the rigidity of the steps and the stability of the tower in a plane orthogonal to the axis of the path is provided and the safety of work is increased, according to Fig. one.

Due to the spacers located at an angle of 20 to 80 degrees to the bowstring of the stairs, an increase in torsional rigidity relative to the axis of the tower, relative to the axis of the path is provided, and the safety of work is increased, according to FIG. one.

By increasing the clearance (2) between the rail (3) and the lower part of the frame (4), the injury to the shin of workers of the power supply distances is reduced and the safety of work is increased, according to Fig. one.

In the particular case of the implementation of the claimed utility model, the lower shunting belt (5) made of a metal profile may be contained, which increases the rigidity of the tower.

The device may additionally contain a grid located in the horizontal plane at the level of the lower fixing belt, which ensures safe transportation of protective and assembly means and devices.

Also, in a particular case, the device can have a shunt bar for equalizing the electrical potential between the working platform and the contact wire, which ensures safe work on the live contact network.

Additionally, the device may contain elements for fastening the stairs and signal flags, ensuring the safe performance of work on the live contact network and increasing the safety of train traffic.

In a particular case, the device can have a device for fastening the tower to the rail, ensuring the rig stability against tipping over and increasing the safety of work.

In a particular case, electrical insulating elements can be made of a fiberglass channel with a cross-sectional area of the bowstring of stairs, steps, struts and tower struts from 200 to 450 mm ² .

In a particular case, each rung of the tower ladder may have struts.

In a particular case, the tower frame can have rubber handles for safe and comfortable transfer of the tower by electricians of the contact network.

Brief Description of Drawings

FIG. 1 - removable insulating tower for work on the railway overhead line.

The device (Fig. 1) consists of a bowstring (1), clearance (2), rail (3), frame (4), lower shunting belt (5), contact wire (6), rubber handles (7), fastening device ( 8), ladders (9), work platform (10), shunt bar (11), spacers (12), struts (13), steps (14).

Implementation of the invention

Operation from a detachable insulating tower on the railway contact network, according to FIG. 1 is carried out as follows:

1. On the eve of the work, the manufacturer issues a warning to trains about the performance of work on the contact network from an insulating removable tower for a certain section of the track.

2. The contractor in the previously developed technological "window" between the trains, upon notification of the energy dispatcher, begins to work on adjusting the contact network under voltage of the contact network, with a rise to a height and fencing the place of work on both sides by signalmen.

3. Four electricians of the contact network of the power supply distance, under the guidance of the work manufacturer, move the tower, resting on the bowstring (1) of the stairs, trying not to expose the lower legs to the clearance (2) between the rail (3) and the lower part of the frame (4). When moving the tower, it is allowed to hold onto the lower shunt belt (5). The tower is installed on the rails under the contact wire (6). The tower is transported by the rubber handles (7).

4. After receiving a notification from the signalmen about the absence of trains on the section of the track, the electricians move the tower along the rails to the place where work starts.

5. At the work site, the tower is held at the edges by electricians. In a particular case, when carrying out work in curved sections of the track, the tower can be additionally fixed by a fastening device (8) to the rail from overturning the tower.

6. Electricians, simultaneously, from both sides, climb the stairs (9) to the working platform (10).

7. At the command of the contractor, shunt rods (11) are hung on the contact wire to equalize the electrical potential between the working platform and the contact wire.

8. In the course of the work, the electricians monitor the reliable contact of the shunt rods with the contact wire.

9. Electricians adjust the zigzag of the contact wire relative to the track axis, focusing on the data of the laboratory car and the central mark of the track axis located on the fence of the working platform. An important role in the precise adjustment of the zigzag of the contact wire is the rigidity of the tower. The higher the rigidity, the less the deviation of the tower from the axis of the path, the more precisely the zigzag will be adjusted. The rigidity of the tower is provided by struts (12) at an angle to the vertical plane and struts at an angle to the horizontal.

10. When working in curved sections of the path, the rigidity of the tower is ensured by the braces (13) of the steps (14).

11. After completing the work on adjusting the height of the overhead wire suspension, the electrician removes the shunt rods.

12. With the shunt rods removed, do not touch the contact wire.

13. The tower moves to the next place of work according to point 7.

14. After the completion of the work, the electricians remove the shunt rods and, after making sure that they are not on the contact wire, at the command of the work supervisor, they simultaneously descend two ladders from the work platform.

15. At the command of the contractor, four electricians move the tower from the rails, from the rolling stock gauge area to a safe storage location. At the same time, constant control of the vertical position of the tower is ensured, for even distribution of the load between the electricians.

16. The place of storage of the tower is usually a contact network support, to which the tower is fixed with two clamps in the girth of the support.

17. The manufacturer of the work on the radio informs the signalmen about the completion of the work.

18. The contractor notifies the energy dispatcher about the completion of the work and about securing the tower.

Claims (3)

1. Removable insulating tower for work on the railway contact network, containing a working platform and a frame connected to it by means of a ladder string, to which at an angle of 20 to 80 degrees, step struts and struts are fixed. 2. The device according to claim. 1, characterized in that the insulating part is made in the form of channels with a cross-sectional profile from 200 to 450 mm ² . 3. The device according to claim 1, characterized in that the working platform is made of an aluminum alloy.

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