JPH0345523B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a moisture-proof work device for working inside electrical equipment, and more specifically, there is a risk that internal parts of electrical equipment such as transformers and insulating oil may come into contact with outside air. This invention relates to a moisture-proof work device that isolates outside air and blocks moisture and dust during internal work.

A conventional working device of this type will be explained using a transformer as an example with reference to FIGS. 1 and 2. In the figure, a hose 3 from a dry air generator 2 is connected to an air supply port 1a of a tank 1 of a transformer,
The dry air supplied to is discharged from an exhaust port 1b provided diagonally to the air supply port 1a. An internal worker 4 entered the tank 1 through a manhole 1c provided on the upper wall of the tank 1 and performed necessary work.

However, according to the above-described work equipment, the worker 4 enters and exits through the manhole 1c on the upper wall of the tank 1, so when it rains or the outside air is humid, moisture may enter the tank 1, causing damage to the insulation of the transformer. There was a problem with deterioration of functionality.

This invention was made with attention to the above points, and is a moisture-proofing method for use in internal work on electrical equipment, which prevents moisture from entering the electrical equipment to be worked on, such as a transformer, during rainy weather or from high-humidity outside air. The purpose is to provide a working device.

An embodiment of the present invention will be described below with reference to the drawings. 3 and 4, when working inside the transformer, a removable partition chamber 5 is placed above a manhole 1c provided in the tank 1 of the transformer.
This partition chamber 5 has a structure in which the bottom opening is closed by the tank 1 to isolate the inside from the outside air, and prevents moisture from the outside air in rainy weather or high humidity from entering the inside of the transformer. . An air supply port 5a is provided in the side wall of the partition chamber 5, and dry air is fed into the partition chamber 5 from a dry air cylinder 7 through a hose 6. The air in the partition chamber 5 is naturally exhausted from the contact gap between the lower end of the partition chamber 5 and the tank 1. Dry air is supplied into the tank 1 from a dry air generator 2 as in the conventional case.

With the above configuration, the internal worker 4 first enters the partition chamber 5, then enters the tank 1 through the manhole 1c and performs the required work. During this time, the manhole 1c is covered by the bulkhead chamber 5, which not only prevents rainwater 8 from entering the tank 1, but also allows dry air to be supplied into the bulkhead chamber 5. , allowing internal work to be carried out without being affected by high humidity outside air. Therefore, it is possible to completely eliminate moisture from entering the transformer.

5, 6 and 7 show preferred embodiments of the partition chamber 10, in which the partition chamber 10 is formed in a rectangular parallelepiped shape surrounded by a rubber bag type ceiling and side walls 11,
An air supply port 12 for injecting air into the rubber bag and an air supply port 13 for supplying dry air into the partition chamber 10 are provided. An opening/closable entrance/exit sheet 14 for workers to enter and exit is provided on a suitable side wall of the partition chamber 10, and inside the partition chamber 10, the partition chamber 10
A dividing sheet 15 is provided that divides the interior into a preparation room 10a and a work room 10b. Further, a hem sheet 16 for preventing outside air from entering is formed on the lower side of the side wall 11. The partition chamber 10 can be safely set in a fixed position by means of a fall prevention member 17 made of metal fittings and a rope.

To describe a moisture-proof work method using the bulkhead chamber 10 configured as described above, the bulkhead chamber 10 is placed above the manhole of the transformer tank, and the ceiling and side walls 1 are
1 is filled with air to stand up the partition chamber 10, and the overturn prevention member 17 is used to secure the partition chamber 10. Next, dry air is supplied from the air supply port 13 into the partition chamber 10 to fill it. At the same time, the air in the partition chamber 10 is discharged to the outside air through the lower gap of the hem sheet 16. Therefore, the inside of the partition chamber 10 is always filled with dry air and there is no intrusion of outside air. Transformer tank 1
As shown in FIGS. 3 and 4, the inside of the transformer is filled with dry air supplied from the dry air generator 2, and outside air does not enter into the inside of the transformer.

The internal workers first open the fastener 14a of the entrance/exit sheet 14 to enter the preparation room 10a, and inside the preparation room 10a, they change from rain-soaked work clothes to dry work clothes, remove water from work jigs, etc. Perform the necessary preparatory work. After that, the divided sheet 15
It is opened to enter the working room 10b, and inside the working room 10b, the inside of the transformer tank is accessed through a manhole. During this time, supply of dry air to the work chamber 10b, preparation chamber 10a, and tank 1 continues.

In the above embodiment, the internal work of a transformer has been described, but the same effect can be obtained even if the present invention is applied to insulating oil filling and draining work of a transformer.

Furthermore, although the above embodiment describes the case of a transformer, it goes without saying that it can be applied to other electrical equipment where it is necessary to prevent moisture from entering into the interior of the equipment, and similar effects can be obtained. do not have.

As described in detail above, the present invention prevents moisture and dust from outside air from entering into the inside of electrical equipment, and allows the work environment of internal work to be controlled at a constant level without being affected by outside air. This has great effects, such as eliminating the need to take weather into consideration when planning.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing the conventional method, FIG. 2 is a schematic front view, FIG. 3 is a schematic plan view of an embodiment of the present invention, FIG. 4 is a schematic front view, and FIG. Similarly, FIG. 6 is a partially cutaway plan view of the partition chamber, FIG. 6 is a front view, and FIG. 7 is a partially cutaway side view. 1... Tank, 1a... Air supply port, 1b... Exhaust port, 1c... Manhole, 2... Dry air generator, 3... Hose, 4... Worker, 5... Bulkhead room, 5a... ... Air supply port, 6 ... Hose, 7 ... Dry air cylinder, 10 ... Bulkhead chamber, 11 ... Side wall, 1
2... Air supply port, 13... Air supply port, 14... Entrance/exit sheet, 14a... Fastener, 15... Divided sheet, 16... Hem sheet, 17... Fall prevention member.
In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A rubber bag type ceiling and side walls equipped with an air supply port, an air supply port for filling the interior with dry air, an opening/closable entrance sheet provided on one of the side walls, and a preparation room inside. It consists of a divided sheet that divides into a work chamber, a hem sheet provided around the lower end of the side wall, and a fall prevention member made of metal fittings and rope, and is removably placed on the top of a tank containing electrical equipment. Moisture-proof work equipment for internal work on electrical equipment, which is equipped with a bulkhead chamber.