JPH0480646A - Contamination measuring apparatus for insulator - Google Patents

Abstract

PURPOSE:To enable quick and highly accurate measurement with a simple construction by a method wherein a washing water is supplied to a washing tank via a long pipeline from a washing water supply source to wash the surface of an insulator to be measured and the washing water is transferred to a tank for measurement. CONSTITUTION:First, with a dummy insulator 28 closing a washing tank 3, a washing water in a tank 1 for washing water is supplied into the washing tank 3 with a pump 4 through a feed water pipeline 2 to clean up the inside of a measuring system. Then, the washing water in a tank 9 for measurement is drained and a fixed amount of the washing water is supplied into the washing tank 3. The washing water is stored into the tank 9 via a pipeline 8 and an intrinsic electric conductivity R1 of the washing water is measured with a conductometer 10. Then, the washing tank 3 is separated into two parts and after an insulator 27 to be measured is moved into the washing tank 3, the washing tank 3 is put together. Thereafter, the rear of the insulator 27 is cleaned up by a specified amount of the washing water and after the cleaning, electric conductivity R2 of contaminated water is measured with the conductometer 10. Then, a salt adhesion density (contamination level) of the insulator 27 is calculated with an arithmetic control section 16 based on a formula R2 - R1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention measures the amount of contaminants containing salt, sulfide, sulfate, gypsum, cement, etc. attached to suspended insulators, long-stem insulators, etc. The present invention relates to an insulator stain amount measuring device that can measure the amount of insulator contamination.

[Conventional technology]

In general, in order to prevent ground faults caused by deterioration of insulation due to salt damage to the support insulators of power transmission lines, it is important to accurately understand contaminants attached to the insulators as equivalent salt adhesion density. As such a contamination amount measuring device, the insulator to be measured is cleaned using ultrasonic vibration in a cleaning tank containing water, and the conductivity of the contaminated water after cleaning is measured using a conductivity meter. Salt adhesion density (amount of contamination) on insulators from electrical conductivity
There are measurement devices that calculate the amount of contamination, and measurement devices that use an insulator to be measured with multiple electrodes baked in advance and measure the resistance between the electrodes with the surface evenly moistened to determine the amount of contamination.

[Problem to be solved by the invention]

However, since the former ultrasonic cleaning device is large in size, it is extremely difficult to install it on a steel tower.

In addition, since the surface to be cleaned must be immersed in cleaning water, it can be used to measure the amount of contamination on insulators with a simple shape such as long-stem insulators, but it can be used to measure the amount of contamination on insulators with complex surface shapes such as suspended insulators. Furthermore, when using a suspended insulator, there is a problem that it cannot be used to measure the amount of contamination only on the underside of the insulator.

On the other hand, the latter measuring device takes time to evenly wet the insulator surface, and also has the problem of low measurement accuracy because it converts the surface resistance into the amount of contamination.

In addition, as a conventional device for measuring the amount of contamination of suspended insulators,
There was also a device that wiped off contaminants adhering to the insulator surface with water-impregnated cotton, dissolved the contaminants in a predetermined amount of water, and then measured the conductivity of the contaminated water to calculate the amount of contamination. However, this has the problem that measuring the amount of contamination is extremely troublesome and takes a long time.

The purpose of this invention is to be able to quickly and accurately measure the amount of contamination of insulators with a simple structure, and to reduce the size and weight of the measuring device mounted on the tower. An object of the present invention is to provide an apparatus for measuring the amount of insulator contamination that can reduce the amount of contamination of an insulator.

[Failure to solve the problem]

In order to achieve the above object, the present invention includes a cleaning water supply source and an insulator cleaning tank connected to the cleaning water supply source via a long pipe line for cleaning the surface of the insulator to be measured with the cleaning water. a measurement tank connected to the insulator cleaning tank via a long pipe line and configured to store cleaning water; and a measurement tank disposed within the measurement tank to measure the conductivity of the cleaning water. and a calculation control means connected to the conductivity meter to calculate the salt adhesion density of the insulator based on the measurement data from the conductivity meter.

[For production]

In this invention, when cleaning water is supplied from the cleaning water tank to the cleaning tank through the pipe, the surface of the insulator to be measured is cleaned. This cleaning water is transferred to a measuring tank through a pipe, and in the tank, the conductivity of the contaminated water after cleaning is measured using a conductivity meter. Furthermore, the calculation control means calculates the salt adhesion density of the insulator based on the measured conductivity.

In this invention, a washing water tank and a measuring tank are arranged above the ground, an insulator washing tank is installed on a power transmission tower, and both the tanks and the washing tank are connected through a long pipe. Therefore, the part of the device mounted on the steel tower is made smaller and lighter, and therefore, when mounting the measuring device on the steel tower, the reinforcing material for the steel tower can be reduced and the mounting work can be performed easily.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The contamination amount measuring device of the present invention will be explained below based on the drawings.

As shown in FIG. 1, an insulator cleaning tank 3 is connected to a cleaning water tank 1 via a long water supply pipe 2, and a normally closed water supply pump 4 is connected to the water supply pipe 2 midway. A solenoid valve SVI is connected. Further, first and second bypass pipes 5 and 6 are connected to the pump 4, a manual valve V is connected to the first bypass pipe 5, and a normally open type valve V is connected to the second bypass pipe 6. A solenoid valve SV2 is connected. And solenoid valve sV
1 is closed and the pump 4 is started with the solenoid valve SV2 open, the cleaning water in the cleaning water tank 1 is pumped from the water supply pipe 2 to the second bypass pipe 6 and the solenoid valve SV.
2, the wash water is returned to the tank 1. At this time, by adjusting the opening amount of the manual valve V, the water pressure of the cleaning water is adjusted while the pump 4 is rotating at a constant speed, and the pump 4 is operated for a predetermined time (at a predetermined rotational speed) with the solenoid valve Svl open. ) The amount of cleaning water supplied when rotating is adjusted.

In the cleaning tank 3, spray nozzles 7 are arranged at appropriate locations for spraying cleaning water at a predetermined pressure onto the back surface of the suspended type insulator 27 to be measured to clean dirt on the surface of the insulator (back surface of the cap). ing.

A measuring tank 9 is connected to the cleaning tank 3 via a long pipe line 8.
or connected. A conductivity meter IO is provided in this measuring tank 9, and is capable of measuring the conductivity specific to the cleaning water stored in the tank 9 or the conductivity of contaminated water after cleaning the insulator.

Further, a stirring blade 11 for stirring the cleaning water is housed in the measurement tank 9, and the blade 11 is attached to a rotating shaft 13 of a motor 12. Further, a drainage pipe line 14 is connected to the lower surface of the measurement tank 9, and a drainage solenoid valve S V 3 is connected in the middle of the pipe line 14.

The conductivity meter IO is connected to the arithmetic and control unit 16 via the lead wire 15.
It is connected to the. As shown in FIG. 3, this calculation control device 16 is composed of a control section 17 and a calculation section 18. An operation signal is output to the elevating mechanism 24 of the measuring insulator 27, etc. Further, the calculation unit 18 subtracts the conductivity specific to the cleaning water from the conductivity output from the conductivity meter 10, calculates the salt adhesion density of the insulator based on the subtracted conductivity, and performs other calculation operations. It is supposed to be done.

Next, an application example of the above-mentioned insulator stain amount measuring device will be explained based on FIG.

A support arm 23 is cantilever-supported on the steel tower 21, and the cleaning tank 3 and an insulator lifting mechanism 24 are attached to the support arm 23. At the lower end of the support rod 25 of the lifting mechanism 24, two series of insulators to be measured are mounted. 26, 27 and - dummy insulators 28 are integrally supported so as to be movable up and down. The dummy insulator 28 is normally installed with the outer periphery of the dummy insulator 28 in contact with the upper inner circumferential surface of the cleaning tank 3. Also, the insulator to be measured 26.27
Later, for example, when measuring the amount of contamination on the insulator 27 to be measured, the support rod 25 is lowered with the cleaning tank 3 divided into two, and the insulator 27 to be measured is lowered to the measurement position in the cleaning tank 3. After that, the cleaning tank 3 is assembled again to seal the outer periphery of the insulator 27 to be measured, and cleaning water is sprayed from the spray nozzle 7 onto the back surface of the insulator 27 to be measured to clean the dirt.

Further, the control unit 17 injects cleaning water from the injection nozzle 7 to the back surface of the dummy insulator 28, the cleaning tank 3, and the pipe line 2 while the outer peripheral edge of the dummy insulator 28 is in contact with the inner peripheral edge of the cleaning tank 3. , 8. It also has a function of outputting a cleaning signal for cleaning the inner surface of the measurement tank 9 and the like by cleaning it with cleaning water.

Next, the operation of measuring the amount of contamination using the insulator contamination amount measuring device configured as described above will be explained.

1st. As shown in Figure 2, when a measurement start signal is input to the control unit 17 from a switch (not shown), etc. with the dummy insulator 28 or the cleaning tank 3 closed, the water supply pump 4 is started and the solenoid valve SV3 is opened. The remaining water in the measuring tank 9 is discharged, and the solenoid valve SV3 is closed.

Next, solenoid valve SVI is opened and solenoid valve SV2 is opened.
is closed, the cleaning water in the cleaning water tank 1 is supplied by the pump 4 through the water supply pipe 2 into the cleaning tank 3, and the back surface of the dummy insulator 28 and the inner peripheral surface of the cleaning tank 3 are cleaned. It is supplied into the measuring tank 9 through the pipe line 8, and the cleaning tank 3, the pipe line 2.8 and the inside of the measuring tank 9 are cleaned.

Then, the solenoid valve SVI is closed and the solenoid valve SV
2 is opened, the motor 12 is energized, and the stirring blade 11 is rotated. As a result, the cleaning water in the measurement tank 9 is stirred within the tank, so that the inside of the tank 9 is efficiently cleaned.

Next, the solenoid valve SV3 is opened and the cleaning water in the measurement tank 9 is discharged, and the solenoid valves SV2 and Sv3 are closed, and the solenoid valve SV1 is opened and a predetermined amount of cleaning water is flushed by the pump 4. It is supplied into tank 3. This cleaning water passes from the cleaning tank 3 through a pipe line 8 and is stored in a measurement tank 9.

Next, the solenoid valve SVI is closed and Sv2 is opened, and then the stirring blade 11 is rotated, the stored cleaning water is stirred in the measurement tank 9, and the specific conductivity of the cleaning water is measured by the conductivity meter 10. R1 is measured.

Next, the cleaning tank 3 is separated into two parts, and the insulator lifting mechanism 24 is operated to move the insulator to be measured 27 into the cleaning tank 3, and then the cleaning tank 3 is combined, and the cleaning tank 3 is It is closely attached to the outer peripheral edge of the measuring insulator 27.

Thereafter, the solenoid valve SV3 is opened and the cleaning water in the measurement tank 9 is discharged. Then, the solenoid valves SV2 and SV3 are closed, and the solenoid valve SV1 is opened, and the back surface of the insulator to be measured 27 is washed with a predetermined amount of washing water. Furthermore, solenoid valve SVI is closed and SV2 is opened, stirring blade 11 is rotated, and the cleaning water in measurement tank 9 is stirred. Thereafter, the conductivity R2 of the contaminated water after washing is measured by the conductivity meter 10.

Next, the calculation unit 18 subtracts the specific conductivity R1 of the cleaning water from the conductivity R2, and then the calculation unit 18 calculates the salt adhesion density (contamination amount) based on the result of the subtraction. The pump 4 is stopped, the insulator 27 to be measured is moved to the exposed position, and the dummy insulator 28 closes the opening of the cleaning tank 3, returning to the initial state.

Now, in the above embodiment, the cleaning tank 3 is connected to the cleaning water tank 11 pump 4 and measurement tank 9 arranged on the ground by long pipes 2 and 8, respectively, and the steel tower 21
Above are a cleaning tank 3, an insulator lifting mechanism 24, and an insulator to be measured 26.
．． 27, the equipment part to be installed on the steel tower 21 is made smaller and lighter, and when the equipment part is installed, reinforcing materials for the steel tower 21 can be eliminated or reduced, and the installation work is also easier. It can be carried out.

Furthermore, in the embodiment described above, a cleaning means is provided for cleaning the cleaning tank 3, the pipe line 8, the measuring tank 9, etc. with cleaning water prior to measuring the amount of contamination on the insulator 27 to be measured. , it is possible to improve the measurement accuracy of the amount of contamination.

Note that the present invention is not limited to the above-mentioned embodiments; for example, by installing a lid (not shown) that automatically opens and closes the upper opening of the cleaning tank 3, the lid may be closed during the cleaning process; When measuring the amount of contamination of the insulator to be measured 27, the lid may be opened to accommodate the insulator to be measured in the cleaning tank 3. Further, in the embodiment, the insulator to be measured 26
．． Although two pieces of No. 27 were used, one piece or three or more pieces may be used.

〔Effect of the invention〕

As described in detail above, the present invention has the advantage that when installing a small and lightweight insulator cleaning tank on a steel tower, reinforcing materials for the steel tower can be eliminated or reduced, and the installation work can be easily performed. In addition, because we use a method to wash contaminated objects with washing water, we can quickly measure insulators with complex shapes such as suspended insulators, and we can measure the conductivity of contaminated water using a conductivity meter. Since the amount of contamination is measured using the same method, the accuracy of measuring the amount of contamination can also be improved.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the entire insulator contamination amount measuring device embodying the present invention, Fig. 2 is a front view of a road body showing an application example of the contamination amount measuring device, and Fig. 3 is a block control of the contamination amount measuring device. It is a circuit diagram. 1...Washing water tank, 2...Water supply pipe, 3...
Cleaning tank, 4... Water supply pump, 7... Injection nozzle, 8
. . . Pipe line, 9 . . . Measurement tank, 10 . . . Conductivity meter, 16 .・Arithmetic unit, 2
DESCRIPTION OF SYMBOLS 1... Steel tower, 23... Support arm, 24... Insulator lifting mechanism, 26. 27... Insulator to be measured. Patent applicant Tokyo Electric Power Company Nippon Insulator Co., Ltd. Agent Patent attorney On 1) Hironobu (and 1 other person) Ri〉−〉 Nono＼sai

Claims (1)

[Scope of Claims] 1. A cleaning water supply source; an insulator cleaning tank connected to the cleaning water supply source via a long pipe line and for cleaning the surface of the insulator to be measured with the cleaning water; A measuring tank connected to the insulator cleaning tank via a long pipe line to store cleaning water, and a conductivity disposed within the measuring tank to measure the conductivity of the cleaning water. and a calculation control means connected to the conductivity meter and configured to calculate the salt adhesion density of the insulator based on the measurement data from the conductivity meter. .