JPH11308724A - Washer of jet slim long rod insulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the washer of a long rod insulator which can wash a long-rod insulator (long rod insulator installed at a high lift, a low place, etc.), securely and easily under a hot-line condition and, further, can wash the long-rod insulator beautifully with little washing water. SOLUTION: The washer of a jet slim long rod insulator 2 is composed of a washing nozzle 14 which sprays water to a long rod insulator 2 installed at the high lift of a tower 1 in an oblique direction from below. A branch pipe 12 which supports the washing nozzle 14, is provided with a piping 7 along the tower and a beam, and is fixed to the tower 1 with U-bolts, nuts, etc. Through the branch pipe 12, washing water is introduced into the piping 7 to reach the washing nozzle 14. Therefore, the washer can be attached to the existing tower 1 easily and securely. Further, the washer can be attached without causing the decline of the strength of the existing tower 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various towers having long trunk insulators (towers refer to various towers such as power towers and substations, and power transmission towers such as "power transmission towers"). The present invention relates to a jet-slim type long trunk insulator cleaning apparatus for cleaning a long trunk insulator attached to a steel tower by obliquely discharging water from below.

[0002]

2. Description of the Related Art A long trunk insulator used for a steel tower is, for example, at a height of about 13 m. Therefore, at present, a person holds a water discharge pipe from the ground, and high pressure (15kg /
Although it is jet-washed with cm ² ), it has problems such as low hit rate, poor cleaning effect, and long cleaning time for using large amount of washing water. In addition, there is a need for saving water and improving the efficiency and labor of maintenance.

In addition, a person holds a water discharge pipe from the ground,
An example of jet cleaning at a high pressure (15 kg / cm ² ) aimed at the long trunk insulator will be examined based on technical literature, and the following inventions (1) to (3) will be mentioned. (1) There is an insulator cleaning machine disclosed in JP-A-62-217815. The present invention has a configuration in which an eccentric injection nozzle is provided at the tip of an operation rod, and it is intended that efficient cleaning can be performed without replacement of the injection nozzle. (2)
JP-A-7-45147 discloses an insulator cleaning method and apparatus.
The present invention has a structure in which a resistance detection device and a hand-held injection device are provided on a water discharge vehicle, and is intended to ensure the safety of an operator using the hand-held injection device, and to facilitate an insulator cleaning operation. (3) JP-A-8-222059 discloses an insulator cleaning apparatus. The present invention has a configuration in which a nozzle is provided at a distal end portion of an operation rod via a flexible pipe, and is intended to safely and easily wash an insulator supporting a high-voltage transmission line.

[0004]

[Problems to be solved by the invention] The above-mentioned references (1) to (3)
Are intended for efficient cleaning, safe and simple cleaning, etc., and are configured to use human means. Therefore, it is not intended to clean the long trunk insulator intended by the present invention beautifully with a small amount of washing water, or to surely and simply wash the long trunk insulator under a live line.

[0005] Further, the constitutions of Documents (1) to (3) have problems such as that a large amount of water is required, that the cleaning effect is not as high as expected, or that skill is required.

[0006]

SUMMARY OF THE INVENTION The present invention provides a long trunk insulator (long trunk insulator at a high place, a low place, etc.) reliably and easily under a live line.
The present invention provides a cleaning device for a long trunk insulator, which can clean the main body and cleanly with a small amount of cleaning water.

The gist of the present invention is a washing apparatus for discharging water from a diagonally lower part of a long-stem insulator attached to a steel tower to clean the long-stem insulator. A branch pipe supporting the nozzle is connected to a pipe provided along with the steel tower and the girder, and washing water introduced into the pipe reaches the cleaning nozzle via the branch pipe. It is a cleaning device for jet slim type long trunk insulator.

The present invention also provides a long-span insulator cleaning apparatus which can be easily and reliably installed on a steel tower. Further, the present invention provides a long trunk insulator cleaning apparatus which can be installed without lowering the strength of a steel tower.

The gist of the present invention is a cleaning apparatus for washing a long trunk insulator attached to a steel tower with a long trunk insulator by discharging water from an obliquely downward direction. A branch pipe that supports the washing nozzle that discharges water from below,
The pipe is attached to the steel tower and the girder, and the pipe is fixed to the steel tower using a U-bolt, a nut, and the like, and the washing water introduced into the pipe is passed through the branch pipe to the washing nozzle. This is a jet slim type long trunk insulator cleaning device characterized by the following.

[0010] The present invention improves the cleaning efficiency of long trunk insulators,
Provided is a cleaning device for a long trunk insulator that can save water.

The gist of the present invention is a jet slim type long trunk insulator cleaning apparatus in which holes of a cleaning nozzle are provided in a straight line.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS When cleaning long trunk insulators, a water supply source is opened. Next, connect the existing buried pipe and the inlet pipe with a hose, close the main valve provided in the pipe, open the air release valve, start the engine pump, check the outflow of washing water from the air release valve by pressure, and then open the air release valve. Close. A pressure gauge is attached to this air vent valve, and after the pressure is increased by, for example, an engine pump, the closed main valve is opened.
As a result, the washing water flowing out of the supply source flows sequentially through the pipes and reaches the branch pipe. Water is discharged from the washing nozzle provided at the tip of the branch pipe to each of the long trunk insulators.

First, for example, a horizontal long-stem insulator of a tower is
It is mounted at about 15 degrees upward from horizontal. The purpose of securing the mounting position is determined in consideration of the charging jumper wire, and is intended to simplify and secure the mounting after all. Water is discharged obliquely upward from below the long trunk insulator, and from the bottom, water is discharged from the bottom of the long trunk insulator, which is relatively dirty. Wash. In other words, there is a feature that the waste water generated by this washing is prevented from flowing down to the washing nozzle, that a quick and efficient, high withstand voltage is ensured, and that washing can be performed with a small amount of water. Therefore,
It is effective for this long trunk insulator to which the arc horn is attached. Of course, the washing nozzle is provided with holes in a straight line, and water is discharged in a straight line and in a diffused manner, so that the amount and time of water sufficient for washing one insulator with the one washing nozzle are obtained. In addition, cleaning can be performed under a live line.

[0014] Next, in the case of a long trunk insulator hanging down on the jumper side, it is preferable to wash the relatively long soiled insulator from the side of the relatively long soiled insulator while sequentially cleaning the other side of the relatively long soiled long trunk insulator. Wash to reach. In addition, wash sequentially from the lower long trunk insulator. As a result, there is a feature that sewage and dirt do not attach to the lower long trunk insulator and do not flash over, and that washing can be performed quickly and efficiently with a small amount of water. Other aspects and configurations are substantially the same as those in the case of the long trunk insulator described above.

By the above operation, when the cleaning of the insulator is completed, the closing of the main valve and the stop of the engine pump are stopped.
After confirming the pressure with a pressure gauge, close the main valve (to prevent water hammer). The supply is stopped and the cleaning operation is completed. This washing time of 3 to 5 minutes is sufficient, and the amount of water can be reduced.

[0016]

An embodiment of the present invention will be described below.

Reference numeral 1 denotes a steel tower provided with a long trunk insulator 2,
Many of the steel towers 1 are erected. A girder 4 (beam) is provided between the towers 1. The long trunk insulator 2 (which is a horizontal long trunk insulator) is provided in a substantially horizontal state on the lead-in side transmission line 5 provided on the girder 4. The long trunk insulator 3 (which is a long trunk insulator) is provided in a hanging state on the jumper-side transmission line 6 provided in the girder 4.

Reference numeral 7 denotes a pipe mounted on the tower 1 or the girder 4 via the U-bolt 8 and fasteners / nuts (not shown). The pipe 7 can be easily mounted on the conventional tower 1 or the girder 4 without processing. . The pipe 7 is provided with a hose 7 a having a pump 9. The hose 7a is provided at a supply source such as a water tank or a tap (not shown). The pipe 7 has a main valve 10,
Various devices for supplying or controlling water, such as a regulating valve 11, are provided, and the supply water is supplied to the pipe 7 at a predetermined pressure and a predetermined amount. The branch pipes 12 and 13 provided at the end of the pipe 7 are provided with cleaning nozzles 14 and 15 for cleaning the long trunk insulators 2 and 3. This cleaning nozzle 1
Numerous holes (not shown) are provided in a straight line in the nozzles 4 and 15, and water is radially discharged from the cleaning nozzles 14 and 15.

In the figure, reference numeral 16 denotes a base of the steel tower 1.

"Experimental example": Outline of test apparatus Long trunk insulator CA43207A x 2 pieces (21 folds / piece), 2 pieces at both ends (4 pieces / piece), 8 pieces in total, short-circuited with aluminum foil, CA
Same conditions as 43206A x 2 pieces (17 folds / piece). The arc horn was simulated with a 10φ round bar and a 185φ circular shape. The gap size was 640 mm because of the difficulty in mounting 670 mm (mounting angle about 15 degrees). In addition, photos for the test of the long trunk insulator shall be submitted in the property submission form.

Test conditions: With the reduction of washing water due to washing with one J5 nozzle (38 liters / min), emphasis was placed on the relationship between wind and the washing effect, and at the same time, the withstand voltage tolerance was checked by measuring leakage current. I do. (Other conditions are
154kv Insulation cleaning (insulator cleaning) performance verification conditions, in accordance with our basic policy of insulator cleaning equipment design).

1) Test voltage. 161kv (design voltage) 193.2kv (161kv x 1.2)
225.4kv (161kv × 1.4) 2) Design fouling. 0.06mg / cm ² 3) washing water resistivity. 5kΩcm (3kΩcm is 161kv) 4) Long trunk insulator mounting angle. Approximately 15 degrees 5) Wind, natural wind (H of West wind 8m / S is selected) 6) Water pressure. 5kg / cm ² (5kg / c from engine pump performance
m ² is small following operation) 7) cleaning time. 3 minutes (3 times of 1 minute washing with 3 J5 nozzles) 8) Water pressure behind opening and closing the main valve (manual valve). 8 kg / cm ² : Test result (shown in FIG. 7) 1) Washing effect (air-washing effect graph is shown in FIG. 8) One J5 nozzle (water volume 38 liter / min) washing effect by washing for 3 minutes
90.3% to 92.5%, clearing 90% or more of the "insulation design tradition" standard.

2) Withstand voltage (test voltage-leakage current graph is shown in Fig. 9) The test voltage is 161 kv, 50 mA, 1.4 times 225.4 kv, 65 mA, our design target is 100 mA or less, and the tolerance is 1.4 design voltage. Double verified. Also, compared with the leakage current before cleaning, the leakage current during cleaning is stable at 10 mA for each test voltage.

3) Opening and closing the main valve (manual valve). It opened and closed smoothly with the attached handle at 8 kg / cm ² .

4) Consideration The cleaning effect is slightly higher when the strong wind is 8m / S (instantaneous 11m / S), but this is influenced by the effect of wind breathing (wind speed graph, Nagoya Meteorological Observatory, Fig. 8), which is often talked about during typhoons. doing. Therefore, even with a natural wind of 10 m / S, the cleaning effect is 90% or more.

The cleaning time is 3 minutes (cleaning 1 with 3 nozzles).
(Three times a minute). The result is that even with strong wind 8m / S, the cleaning effect is
90% or more. Therefore, the pollution value of the long trunk insulator is normal 0.
If controlled within 06 mg / cm ² , the cleaning effect can be enhanced by extending the cleaning time even if the amount of cleaning water is small.

The leakage current is reduced by the amount of water by one nozzle.
With a test voltage of 225.4kv, there is a small margin of 65mA. In addition, it is understood that the withstand voltage performance is high because the voltage is stable at 10 mA irrespective of the test voltage as compared with before the cleaning.

Test date, location February 4-5, 1998 Nawa Plant

[0029]

According to the first aspect of the present invention, a branch pipe for supporting a washing nozzle for discharging water from an obliquely downward direction to a long insulator of a steel tower is connected to a pipe provided with a steel tower and a girder, and introduced into the pipe. This is a jet-slim type long-span insulator cleaning device that has a configuration in which cleaning water reaches a cleaning nozzle via a branch pipe, and discharges water from a cleaning nozzle to a long-span insulator from obliquely below. Therefore, it is possible to provide a long trunk insulator cleaning apparatus which can perform insulator cleaning reliably and easily under a live line, and which can be beautifully cleaned with a small amount of cleaning water.

According to a second aspect of the present invention, a branch pipe for supporting a washing nozzle for discharging water from an obliquely downward direction to a long trunk insulator of a steel tower is provided on a pipe provided with a steel tower and a girder. Jet slim type long trunk that secures the water using a pipe etc. and the cleaning water introduced into the piping reaches the cleaning nozzle via the branch pipe, and discharges water from the cleaning nozzle to the long insulator from diagonally below. This is an insulator cleaning device. Therefore, there are the features that the apparatus can be easily and reliably installed on an existing tower, and that the apparatus can be installed without lowering the strength of the existing tower.

A third aspect of the present invention is a jet slim type long trunk insulator cleaning apparatus in which the holes of the cleaning nozzle are provided in a straight line. Therefore, there is a feature that the cleaning efficiency of the long trunk insulator can be improved and water can be saved.

[Brief description of the drawings]

FIG. 1 is a front view showing the entirety of an example of the present invention.

FIG. 2 is an enlarged front view of a main part of FIG.

FIG. 3 is a plan view showing one line of the digit of FIG. 1;

FIG. 4 is an enlarged overhead view of the girder of FIG. 1;

FIG. 5 is an enlarged bird's-eye view showing a main part of the girder of FIG. 1;

FIG. 6 is a front view showing the whole of another example of the present invention.

FIG. 7 is a table showing test results of the present invention.

FIG. 8 is a graph showing the wind-cleaning effect of the test of the present invention.

FIG. 9 is a graph showing test voltage-leakage current of the test of the present invention in a graph.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 steel tower 2 long trunk insulator 3 long trunk insulator 4 girder 5 lead-in side power line 6 jumper side power line 7 pipe 7 a hose 8 U bolt 9 pump 10 main valve 11 regulating valve 12 branch pipe 13 branch pipe 14 washing nozzle 15 washing nozzle 16 base

Claims (3)

[Claims] 1. A washing device for washing a long-stem insulator attached to a steel tower with a long-stem insulator by discharging water from an obliquely lower side, comprising: a branch supporting a cleaning nozzle for discharging water from the obliquely lower portion to the long-stem insulator. A jet-slim long trunk, wherein a pipe is connected to a pipe provided along with the steel tower and the girder, and washing water introduced into the pipe reaches the washing nozzle via the branch pipe. Insulator cleaning device. 2. A washing apparatus for washing a long-stem insulator attached to a steel tower with a long-stem insulator by discharging water from an obliquely downward direction, the branch supporting a cleaning nozzle for discharging water from the obliquely downward direction to the long-stem insulator. A pipe is provided in a pipe provided along with the tower and the girder, and the pipe is fixed to the tower using a U bolt and a nut, and the washing water introduced into the pipe is passed through the branch pipe. A jet slim type long trunk insulator cleaning device, which reaches the cleaning nozzle. 3. The jet slim type long trunk insulator cleaning apparatus according to claim 1, wherein the holes of the cleaning nozzle are provided in a straight line.