JPH0465605B2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention cleans insulators soiled by typhoons, soot, seasonal winds, etc., maintains the designed insulation strength, and prevents disasters due to soiling of the insulators. The present invention relates to an insulator washing machine for cleaning insulators used in electrical stations and power transmission lines in a live state.

(Prior Art) Insulators in use at electrical stations, power transmission lines, etc. are contaminated by typhoons, soot, seasonal winds, etc., resulting in a decrease in insulation strength, leading to flashover accidents. For this reason, an insulator cleaning machine for cleaning and removing contaminants adhering to the surface of an insulator has been proposed. This insulator washer is composed of a pump for pressurizing water, a water hose connected to the pump, an operating rod connected to the water hose, and an injection nozzle provided at the tip of the operating rod. .

(Problems to be Solved by the Invention) However, since the conventional insulator washer sends pressurized water to the injection nozzle through the operating rod, the operating rod is electrically conductive, and the There was a risk that a ground fault could occur from the washing water. Therefore, in order to prevent such ground faults, it was necessary to ensure that the distance between the live part and the injection nozzle was at least a certain distance depending on the voltage. Not only does this weaken the ability to clean the insulator surface, but the spray nozzle is separated from the insulator to be cleaned, making it difficult to clean the back side of the insulator folds. There was a problem that it became impossible to achieve the goal.

Structure of the Invention (Means for Solving the Problems) Therefore, in order to solve the above problems, this invention has the following features:
A spray nozzle is provided at the tip of a tubular operating rod made of an insulating material so as to communicate with the hollow part of the operating rod, and a water tank is provided between the operating section of the operating rod and the spray nozzle to supply water to the spray nozzle. Further, an air supply hose for supplying compressed gas from a compressed gas supply source to the injection nozzle via the hollow part of the operating rod is connected to the proximal end side of the operating part of the operating rod. adopted the means.

(Function) Therefore, since there is no water between the operating part of the operating rod held by the operator and the water tank,
Insulation is ensured by the operating rod. In addition, the water droplets of the cleaning water sprayed from the spray nozzle by the compressed gas are fragmented, and the electrical insulation of the cleaning water flow itself is increased. Therefore, unlike in the past, there is no need to maintain a predetermined separation distance between the charging part and the injection nozzle, and it is also possible to bring the injection nozzle close to the object to be cleaned during cleaning work. Moreover, since the compressed gas is supplied to the injection nozzle through the hollow part of the operating rod, there is no need to arrange an air supply hose close to the tip of the operating rod where the injection nozzle is provided.

(Example) Hereinafter, an example embodying this invention will be described in the first to
Figure 4 will be explained.

FIG. 1 shows an insulator chain 1 made up of a plurality of suspended insulators 2 mounted on a transmission line tower (not shown), and an insulator cleaning machine 10 of the present invention. At the end of the flexible air supply hose 11 connected to a compressed gas supply source (not shown) installed on the ground, there is a tubular handle made of an insulating material that also serves as an air supply hose via a joint 12. A rod 13 is connected for relative rotation.

As shown in FIGS. 1 and 2, the operating rod 13
The proximal end of the attachment tube 16 is attached to the distal end of the
An injection nozzle 15 is attached to the tip of the attachment tube 16 eccentrically with respect to the axis of the operating rod 13. Although not shown, the operating rod 13 and the mounting pipe 16 communicate with each other through their hollow parts.
In this embodiment, the compressed gas supplied through the air supply hose 11 is supplied to the injection nozzle 15 through the hollow portions of the operating rod 13 and the attachment pipe 16. Further, a front annular shape and a water tank 18 shown in FIG. 4 are inserted into the operating rod 13 so as to be relatively rotatable so as to be located between the valve 17 provided on the base end operating portion 13a and the injection nozzle 15. ing. An air intake pipe 19 is provided at the top of the water tank 18 and also serves as a water supply port provided with a check valve (not shown).

The water tank 18 and the injection nozzle 15 are communicated with each other by a flexible water pipe 20.
The water sent from 8 to the injection nozzle 15 is sucked and mixed by the compressed gas sent to the attachment pipe 16 through the hollow part of the air supply hose 11 and the operating rod 13 by the ventilate effect of the injection nozzle 15, and is mixed into a mist. It is starting to be sprayed.

The eccentricity L of the injection nozzle 15 is
Letting the outer diameter of 8 be D, it is given by L≧D/2.

The cleaning of the insulator 2 by the insulator washer 10 configured as described above will be explained.

First, when the injection nozzle 15 is inserted between each insulator 2 and the valve 17 of the operating part 13a is opened, compressed gas from the compressed gas supply source is supplied to the air supply hose 11.
The compressed gas is supplied to the attachment pipe 16 via the operating rod 13, and the water in the water tank 18 is suction-mixed by the injection nozzle 15, and the water is sprayed out from the injection nozzle 15.

Then, the operator rotates the operation part 13a in the direction of the arrow as shown in FIG. 3, so that the water spray area expands into an arc shape as shown by the two-dot chain line, and water is sprayed in all directions. , each insulator 2 is thoroughly cleaned.

Now, the insulator washer 10 configured as described above has the operating portion 13a of the operating rod 13 and the injection nozzle 15.
Since the water tank 18 is provided between the wire and the wire, there is no water at hand, and there is no ground fault accident from washing water, which is the most probable ground fault route in the past, and live wire washing work can be carried out safely.

In addition, water particles of the water sent from the water tank 18 to the injection nozzle 15 are fragmented by the compressed gas, and the electrical insulation of the cleaning water flow itself increases, which also increases the electrical insulation provided by the operating rod 13. This makes it possible to reliably prevent accidents from occurring. As a result, unlike in the past, where the injection nozzle 15 was required to be separated from the live parts by a predetermined distance to prevent ground faults, cleaning work can be performed with the injection nozzle 15 close to the object to be cleaned, resulting in improved cleaning power. It is possible to reliably clean the soiled parts of the insulator chain 1 by maintaining the strength of the insulators, and also to easily clean the back side of the insulator folds, thereby reliably achieving the purpose of cleaning.

Moreover, since the compressed gas is supplied from the compressed gas supply source to the injection nozzle 15 through the hollow part of the operating rod 13, the operating rod 13
There is no need for a pipe-shaped or string-like air supply member such as the air supply hose 11, which is flexible and easy to hook, to be present near the tip of the tube. Therefore, insulator 1
During the cleaning work, especially when cleaning the back side of the insulator folds, the spray nozzle 15 can be freely moved to accurately clean the soiled area without having to hook the air supply hose 11 etc. on the insulator chain 1. can do.

Further, in this embodiment, the water tank 18 is formed in an annular shape, so that even when the water tank is full or when the water level decreases as shown by the solid line, the center of gravity remains on the vertical line that includes the operating rod 13. Easy to handle.

Furthermore, since the injection nozzle 15 is provided eccentrically with respect to the tip of the operating rod 13, the injection nozzle 15 is inserted between each insulator 2 and the operating rod 13 is rotated to make the water injection area arcuate. , it is possible to clean every corner of the insulator 2. Therefore, compared to a conventional insulator washer in which the injection nozzle is replaced depending on the location to be cleaned, the insulator 2 can be easily cleaned and work efficiency can be improved.

The above embodiment describes in detail the cleaning work of suspended insulators among the insulators for power transmission line towers, but these work also cleans other insulators, such as long trunk insulators, insulator pipes used in electrical stations, support insulators, etc. The same is basically true when it comes to targets.

Note that this invention may be implemented as follows.

(1) Although not shown, the injection nozzle 15 is directly connected to the tip of the operating rod 13, and the attachment pipe 16 is omitted.

(2) In the above embodiment, the air intake pipe 19 provided in the water tank 18 is also used as a water supply port, but a water supply port may be provided separately.

(3) Water tank 18 side of water supply pipe 20, injection nozzle 1
A water supply valve is provided on the 5 side or in the middle of the water pipe 20,
By closing the valve when water is being supplied to the water tank 18 and opening it during cleaning, the injection nozzle 15 is
Water leakage can be prevented.

Also, the water supply valve may be operated manually, but this valve may be a spool valve whose operation source is cleaning compressed gas.
If air is supplied from the valve operating pipe connected to the operating rod 13 or the mounting pipe 16, the pressure inside the operating rod 13 will increase when the valve is opened, and this pressure will operate the spool valve and supply water to the injection nozzle 15. It becomes more preferable.

(4) Although the spray nozzle 15 only sprays cleaning water in one direction, if a spray port or another spray nozzle is installed in the opposite direction, it is possible to simultaneously clean the top and bottom surfaces of the insulator to be cleaned. It becomes more preferable.

(5) The length of the operating rod 13 is adjustable to accommodate various insulator lengths.

Effects of the Invention As described in detail above, according to the present invention, not only is insulation ensured by the operation rod without water intervening between the operation part held by the operator and the water tank, but also the pressure The electrical insulation of the cleaning water stream itself is also increased by the gas, so it is possible to reliably prevent ground faults from the cleaning water, and the spray nozzle does not need to be separated from the object to be cleaned, allowing cleaning operations to be carried out close to it. Therefore, the cleaning power based on the injection pressure can be maintained strongly to deal with soiled areas such as the back side of the insulator folds, and the purpose of cleaning can be reliably achieved. Furthermore, compressed gas is supplied to the injection nozzle at the tip of the operating rod through the hollow part of the operating rod, and there is no need for an air supply hose to be placed near the tip of the operating rod. This has an excellent effect in that the spray nozzle can be quickly, freely, and accurately moved to the contaminated area without the risk of the hose or the like getting caught on the object to be cleaned, and cleaning work can be carried out efficiently.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment embodying this invention, FIG. 2 is an enlarged front view showing an injection nozzle,
3 is an enlarged sectional view taken along the line A--A in FIG. 1, and FIG. 4 is a longitudinal sectional view showing the water tank. 11... Air supply hose, 13... Operation rod,
13a... Operating unit, 15... Injection nozzle, 18...
...Water tank, 20...Water pipe.

Claims (1)

[Scope of Claims] 1. An injection nozzle 15 is provided at the tip of a tubular operating rod 13 made of an insulating material so as to communicate with the hollow part of the operating rod 13.
A water tank 18 for supplying water to the injection nozzle 15 is provided between the operating portion 13a of the operating rod 13 and the injection nozzle 15, and a compressed gas supply source is provided at the base end side of the operating portion 13a of the operating rod 13. An insulator cleaning machine characterized in that an air supply hose 11 for supplying gas to the injection nozzle 15 through the hollow part of the operating rod 13 is connected. 2 A mounting tube 16 is attached to the tip of the operating rod 13.
is connected in communication with the hollow part of the operating rod 13, and the injection nozzle 15 is connected to the tip of the mounting pipe 16.
The insulator cleaning machine according to claim 1, wherein: 3. The insulator washer according to claim 1, wherein the water tank 18 has a substantially annular shape and is rotatable relative to the operating rod 13.