JP3295293B2 - Water quality improvement device in insulator cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water quality improvement device for an insulator cleaning device having a water storage tank.

[0002]

2. Description of the Related Art A conventional insulator cleaning device stores water such as city water and well water in a water storage tank 21 as shown in FIG.
The water is supplied to the insulator cleaning nozzle 24 by the pump 22 through the automatic partitioning valve 23, and the insulator 25 is injected with water to perform cleaning. However, when the quality of the washing water deteriorates, FIG.
As shown in the graph, the withstand voltage of the cleaning is reduced, which causes a flash accident during the cleaning.

[0003] The graph of FIG. 8 shows that the amount of fouling adhered to the insulator is an equivalent salt deposition density which is generally regarded as a fouling control value.
It shows the relationship between cleaning water quality and cleaning withstand voltage in the region of 0.03 to 0.06 mg / cm ² . As shown in this graph, if the cleaning withstand voltage is 100% when the volume resistivity of the cleaning water is 5.0 kΩ-cm, the voltage drops sharply when it is less than 3.0 kΩ-cm, and the volume resistivity of the cleaning water becomes lower. When it is reduced to 1.0 kΩ-cm, the withstand voltage of insulator cleaning is reduced to 70% compared to 5.0 kΩ-cm. Further, when the withstand voltage for cleaning decreases, the limit value of the contamination control decreases, and the required number of times of cleaning increases, so that the amount of cleaning water increases. For this reason, the lower limit of the cleaning water quality during the operation of the insulator cleaning device is expected to lower the withstand voltage for cleaning, and is generally 5.0 kΩ-cm.
It is managed by.

Therefore, conventionally, a device has been devised in which a water quality meter 26 is installed in the water storage tank 21 of the insulator cleaning device, and the pump 22 is automatically stopped when the water quality in the water storage tank 21 falls below a control value. However, in recent years, the water quality of city water, well water, and the like has also tended to deteriorate with the deterioration of river water quality, and there has been a possibility that insulator cleaning may not be performed immediately when insulator cleaning is required. In addition, since the water quality of the water storage tank 21 also decreases due to a rise in water temperature in summer, there is a possibility that the smooth operation of the insulator cleaning device cannot be performed.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and automatically improves the quality of water in a water supply source or a water storage tank when the quality of the water is reduced. The purpose of the present invention is to provide a water quality improvement device in an insulator cleaning device capable of maintaining a high voltage.

[0006]

A water quality improvement device for an insulator cleaning device according to the present invention, which has been made to solve the above-mentioned problems, includes a water quality improvement device between a water storage tank and a water supply source of the insulator cleaning device. The water quality improvement pipeline and the bypass pipeline of the water quality improvement pipeline were installed in parallel, and a water return pipeline for returning water from the water storage tank to the outlet of the water supply source was installed. In this case, a part of the water in the water storage tank is returned through the water return pipe, passed through the water quality improvement pipe, and returned to the water storage tank.
When the water tank needs to be watered, the water quality of the water supply source decreases
If you are, if I was cleared water quality set value of the water tank of the water supply source water flowing in parallel to the water quality improvement conduit and the bypass conduit, the water quality of the water storage tank is not clear the setting value If not, the whole quantity is passed through a water quality improvement pipeline and supplied to a water storage tank.

[0007]

Preferred embodiments of the DETAILED DESCRIPTION OF THE INVENTION Hereinafter the invention will be described in further detail with reference to FIGS. FIG.
1 is an overall view of a water quality improvement device in the insulator cleaning device of the present invention, wherein 1 is a water supply tank as a water supply source, 2 is a water supply pump, 3 is a water storage tank, 4 is an insulator washing pump, 5 is an automatic partitioning valve, and 6 is The insulator cleaning nozzle 7 is an insulator to be cleaned.

In this example, as shown in the figure, a water quality improvement pipe 10 in which water quality improvement means 8 and filtration means 9 are connected in series between the water supply tank 1 and the water storage tank 3, and a water storage tank 3 From the outlet of the water supply tank 1 which is the water supply source
Return water conduit 11 for returning to the suction side of the water supply pump 2 to location
And are provided in parallel. Further, a bypass pipe 12 of the water quality improvement pipe 10 is also provided in parallel with them, and a tip of the bypass pipe 12 is connected to an outlet of the water quality improvement pipe 10 so that the water passing through the bypass pipe 12 and the water quality improvement pipe are connected. The structure is such that water that has passed through the road 10 is mixed.

A water supply solenoid valve V1 is provided in the water return pipe 11;
A water supply solenoid valve V2 is provided in the water quality improvement pipe 10, and a water supply solenoid valve V3 is provided in the bypass pipe 12. The water tank 3 has a water quality meter HC1 and the water supply tank 1 has a water quality meter HC2.
Are provided respectively.

As the water quality improving means 8, an ion exchange resin or a reverse osmosis membrane is generally used. Ion-exchange resins produce pure water by chemically adsorbing and removing impurity ions in water. Pure water with a volume resistivity of 1000 kΩ-cm or more (conductivity of 1 μs / cm or less) is used. Is obtained. The reverse osmosis membrane captures impurities at the molecular level to obtain water with a volume resistivity of 100 kΩ-cm or more (conductivity of 10 μs / cm or less). In order to prevent these water quality improving means 8 from being blocked by turbidity in the water, a filtering means 9 is provided on the upstream side.

The water (pure water) obtained by the water quality improving means 8 has an extremely low impurity concentration. For this reason, when flowing directly into the insulator cleaning device, there is a possibility that zinc or the like is precipitated from the galvanized steel pipe or the like used as a pipe to the nozzle 6 for insulator cleaning, and the steel pipe or the like is corroded. For this reason, the present invention does not use the water obtained by the water quality improvement means 8 as it is, but uses the water returned through the water return pipe 11 or the ordinary water from the water supply source as the water quality improvement means. Mix with the passed water and set the cleaning water quality to the set value (normally 5.0k
Ω-cm) to a satisfactory level.

Next, according to the flow sheets shown in FIGS. 2 and 3,
The water quality improving method of the present invention will be described. FIG. 2 shows a flow when the water quality of the water storage tank 3 is reduced. Water storage tank 3
When the signal indicating the decrease in water quality is transmitted from the water quality meter HC1, the water supply solenoid valve V1 and the water supply solenoid valve V2 are opened. Then, the water supply pump 2 is started, and a part of the water in the water storage tank 3 is returned through the water return pipe 11 and passed through the water quality improvement pipe 10,
After improving the water quality, the water is returned to the water storage tank 3 and mixed with the water in the water storage tank 3. As a result, the water quality of the water storage tank 3 is gradually improved. After confirming that the signal from the water quality meter HC1 has cleared the set value (5.0 kΩ-cm), the improvement device is stopped and the nozzle 6 for insulator cleaning is stopped. Water to clean the insulator.

FIG. 3 shows the volume specific resistivity of raw water (in this case, water of low water quality in the water storage tank 3) on the horizontal axis.
The vertical axis is a graph showing the mixing ratio of water required for clearing the set value (5.0 kΩ-cm). For example, when the water quality in the water storage tank 3 is reduced to 2.0 kΩ-cm, it can be seen that the set value (5.0 kΩ-cm) can be cleared by circulating 60% of the water through the water quality improvement pipeline 10. As described above, in the present invention, water whose quality has been improved by the water quality improvement pipe 10 is not directly sent to the nozzle 6 for insulator cleaning, but is always mixed with ordinary water and then sent to the nozzle 6 for insulator cleaning. There is a great feature in that it is done. This makes it possible to not only keep the withstand voltage of the insulator cleaning high, but also prevent corrosion of the piping to the nozzle 6 for insulator cleaning.

FIG . 4 shows a flow when the water quality of the water supply tank 1 as a water supply source is reduced when the water level of the water storage tank 3 is lowered and the water storage tank 3 needs to be supplied with water. When a signal indicating a decrease in water quality is transmitted from the water quality meter HC2, the water supply solenoid valve V2 is opened and the water supply pump 2 is started. As a result,
The water in the water supply tank 1 is improved in water quality through a water quality improvement pipeline 10, and then supplied to the water storage tank 3. A water quality meter determines whether the water quality of the water storage tank 3 has cleared the set value.
Judging from the signal of HC1, if the water quality of the water storage tank 3 clears the set value, the water supply solenoid valve V3 is opened, and the water of the water supply tank 1 flows in parallel to the water quality improvement pipe 10 and the bypass pipe 12. . As a result, the water of which the water quality has been improved and the water from the water supply tank 1 are mixed and supplied to the water storage tank 3, and then supplied to the nozzle 6 for insulator cleaning.

When the water quality of the water storage tank 3 has not cleared the set value, the water supply solenoid valve V3 of the bypass pipe 13
Close. Then, since the entire amount of the water in the water supply tank 1 is supplied to the water storage tank 3 through the water quality improvement pipeline 10, the water quality of the water storage tank 3 is rapidly improved. In any of the above cases, the water whose quality has been improved after passing through the water quality improvement pipe 10 is not directly sent to the nozzle 6 for insulator cleaning, and is always used in a state of being mixed with ordinary water. Therefore, it is possible to keep the withstand voltage of the insulator cleaning high, and it is possible to prevent corrosion of a pipe or the like to the nozzle 6 for insulator cleaning. In the above example, an electromagnetic valve is used for the water supply valve,
Although it was explained that the operation was performed with fully open and fully closed, the water quality meter HC1, HC
In order to change the mixing ratio between the water from the water quality improvement pipeline 10 and the raw water according to the water quality of 2, the electric valve may be used instead of the solenoid valve to adjust the opening.

FIG. 5 is a graph showing the relationship between the contamination control value of the insulator and the cleaning withstand voltage for reference. As shown in this graph, when the water quality of the cleaning water is 5.0 kΩ-cm, the design voltage can be maintained even if the amount of contamination of the insulator is 0.03 mg / cm ² , but the water quality of the cleaning water is 3.0 kΩ-cm. Since the cleaning withstand voltage decreases as indicated by the broken line when the temperature decreases to cm, it is understood that the contamination control value of the insulator needs to be 0.02 mg / cm ² in anticipation of the decrease. A decrease in the fouling control value leads to an increase in the required number of washings, that is, an increase in the amount of washing water.

FIG. 6 shows a modification of the apparatus of FIG.
The water return pipe 11 is branched from the discharge side of the porcelain washing pump 4, and the water in the water storage tank 3 is passed through the water quality improvement pipe 10 by the discharge pressure of the porcelain washing pump 4. It is omitted. If the insulator washing pump 4 and the water supply pump 2 are used in this manner, the cost of the apparatus can be reduced.

[0018]

[0019]

As described above, according to the present invention, when the water quality in the water supply source or the water storage tank is lowered, the water quality can be automatically improved to maintain the cleaning withstand voltage high. Since the water (pure water) obtained by the improvement means is always mixed with ordinary water and sent to the nozzle for insulator cleaning, the capacity of the water quality improvement device can be reduced, and corrosion of piping can be prevented. There are advantages such as.

[Brief description of the drawings]

FIG. 1 is an overall view of an apparatus of the present invention.

FIG. 2 is a flow sheet according to the invention of claim 1;

FIG. 3 is a graph showing the relationship between the volume specific resistivity of raw water and the mixing ratio of water quality improvement water required to clear a set value.

FIG. 4 is a flow sheet according to the invention of claim 2;

FIG. 5 is a graph showing the relationship between the amount of insulator fouling and the withstand voltage of cleaning.

FIG. 6 is an overall view showing a modification of the apparatus of FIG. 1;

FIG. 7 is an overall view showing a conventional example.

FIG. 8: Change rate of volume specific resistivity and cleaning withstand voltage of cleaning water
6 is a graph showing a relationship with the graph.

[Explanation of symbols]

1 water tank, 2 water pump, 3 water storage tank, 4
Insulator washing pump, 5 compartment automatic valve, 6 Insulator washing nozzle, 7 Insulator to be washed, 8 Water quality improvement means, 9
Filtration means, 10 water quality improvement pipeline, 11 return water pipeline, 12 bypass pipeline, 21 water storage tank, 22 pump, 23 zone automatic valve, 24 insulator cleaning nozzle, 25 insulator, V1 water supply solenoid valve, V2 water supply Solenoid valve, V3 water supply solenoid valve, HC1 water quality meter, HC
2 Water quality meter

Continuation of the front page (56) References JP-A-49-63993 (JP, A) JP-A-7-265859 (JP, A) JP-A-54-50475 (JP, A) JP-A-6-81691 (JP) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01B 17/00-17/54 B08B 3/14 C02F 1/00

Claims (1)

(57) [Claims] 1. A water quality improvement pipe provided with water quality improvement means and a bypass pipe of the water quality improvement pipe are provided in parallel between a water storage tank of an insulator cleaning device and a water supply source. Return line to the outlet of the water supply source, and if the water quality of the water storage tank is reduced, a part of the water in the water storage tank is returned through the water return line to After passing the improvement pipe back to the water storage tank, the water level in the water storage tank
When reduced need for water in the holding tank has occurred, when the water quality of the water supply is decreased, the water supply source of water quality improvement conduit and the bypass if my quality of the water storage tank is to clear the set values A water quality improvement device for an insulator cleaning device characterized by flowing in parallel to a pipe and, if the water quality of the water storage tank has not cleared a set value, passing the entire amount through a water quality improvement pipe and supplying water to the water storage tank. .