JPS63224304A - Water resistor and method of avoiding its arc discharge - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (1) Purpose of the Invention [Industrial Application Field 1 The present invention is directed to a novel water resistor and This article relates to a method for preventing arc discharge.

[Prior Art] This new water resistance fiA created by the present inventor and filed as Utility Model Application No. 177469/1983 has a water supply hole 1 in the middle part of the side wall and a drainage hole in the bottom as shown in FIG. The base electrode 3 is a bottomed cylindrical base electrode 3 which has a hole 2 perforated therein to store a predetermined amount of water therein. It consists of a cylindrical main electrode 5 to which a power cable (none of which is shown) is connected, and an insulating sheath cylinder 6 that covers the main electrode 5 and is suspended so as to be movable up and down to adjust the exposed length of the main electrode 5. , the water resistance eA is one in FIG. 3, but two or more make up a set, and each main electrode 5 connects one phase of each of two or three phases of a power supply device (not shown), On the other hand, the base electrodes 3 are mutually connected and grounded.

The water supply hole 1 and the drain hole 2 are connected to an electrode water treatment device (not shown) that circulates water to maintain a constant water temperature and remove impurities.

However, even with the bridge water treatment device, the water supply hole 1 is located in the middle of the side wall, so the cooled supply water only cools the side wall, and when the main electrode 5 is used at high pressure, the current between the electrodes is The density increases closer to the center and the amount of heat generated increases, so if the surface temperature of the high voltage main electrode 5 rises rapidly and bubbles are generated, an arc α will occur between the high voltage main mold wA5 and the base electrode 3.
There is a habit of electrical discharge occurring.

If this arc α discharge were to occur, the lower end of the insulating sheath cylinder 6 in the portion that came into contact with the arc α would burn out, reducing the insulation effect.

Therefore, if the insulating sheath cylinder 6 is to be replaced at the top of the furnace each time, and the use is continued, there is a risk of a serious accident, and safety measures must be taken.

[Problems to be Solved by the Invention] The present invention aims to provide an arc discharge prevention method and a water resistor that are effective and suitable for eliminating the arc burnout accident of the insulating sheath cylinder in the water resistor.

(2) Structure of the Invention [Means for Solving Problems] The present invention includes a cylindrical base electrode with a bottom that stores a predetermined amount of the circulating supply, and a cylindrical base electrode that is pierced through the center of the bottom of the base electrode. a cylindrical high-voltage main electrode that extends through the insulating support and connects the power cable of the power supply device to the lower end of the electrode;
In a water resistor comprising an insulating sheath covering the high voltage main electrode, which is suspended so as to be movable up and down in order to adjust the exposed length of the high voltage main electrode, the cooled circulating supply water flows outside the high voltage main electrode. In carrying out an arc discharge prevention method in a water resistor in which water is cooled on or around the outer surface of the high-voltage main electrode by spraying water so as to directly touch the surface, the upper part of the insulating sheath and the insulating support are A water resistor is used in which a water discharge port for the cooled circulating supply water is provided at an appropriate location on at least one of the upper ends of the water resistor.

[Example] A first example of the water resistor of the present invention will be described with reference to FIG.

The water resistor B of the present invention has the following features in the water resistor A of FIG.
A base electrode 3 is mounted on the ceiling 6a of an insulating sheath tube 6 made of plastic such as polypropylene or Teflon, which boasts heat resistance of 100°C or more.
A fine racemic cylindrical ring 8 has a water discharge lower in place of the water supply hole 1, and a fine ceramic cylindrical ring 8 having arc heat resistance is fitted on the inner peripheral surface of the lower end.
A stepped protrusion 8a having an outer diameter matching the inner diameter of the insulating sheath cylinder 6 and a thickness matching the lower end of the insulating sheath cylinder 6 is provided on the outer periphery of the lower end.

9 in the figure is a water supply pipe.

Note that other members are the same as those constituting the water resistor in FIG. 3, and the same members are given the same reference numerals.

Further, in this embodiment, the water discharge lower is the ceiling part 6a1. =ffR is provided, but the side wall portion or a plurality of portions may be used.

A second embodiment of the water resistor of the present invention will be described with reference to FIG.

The water resistor C of the present invention has the following features in the water resistor A of FIG.
A fine ceramic cylindrical ring 8 having arc heat resistance is fitted into the lower end inner peripheral surface of an insulating sheath n6 made of plastic such as polypropylene or Teflon that is heat resistant to 100°C or more, and the base electrode 3 of the water resistor A is Water supply hole 1
Instead, a water outlet 10 is provided extending vertically through the insulating support 4 and surrounding the high-voltage main electrode 5 at its upper end.

The fine ceramic cylindrical ring 8 has an outer diameter that matches the inner diameter of the insulating sheath 6, and a stepped protrusion 8a that matches the thickness of the lower end of the insulating sheath 6 on the outer periphery of the lower end.

11 in the figure is a water supply pipe.

The other members are the same as those of the water resistor A shown in FIG. 3, and the same members are given the same reference numerals.

Further, although the number of water outlets 10 is plural in this embodiment, it may be one.

The method of the present invention when using the water resistors B and C of the present invention will be explained with reference to FIGS. 1 and 2.

When water resistors B and C are in operation, each is a water discharge lower.

A water supply pipe 9.10 passes through an electrode water treatment device (not shown).
The cooled supply water β, γ circulated through the tubes 11 is discharged so as to directly touch the outer surface of the high-voltage main electrode 5. In other words, in the case of water resistor B, the ceiling of the insulating sheath cylinder 6 6
The supply water β that falls from the insulating sheath cylinder 6 falls into the electrode water ε, which is hermetically surrounded by the insulating sheath cylinder 6, and the low-temperature water that falls gradually contacts the outer surface of the high-voltage main electrode 5 and flows downward. Go.

Therefore, the electrode water ε in the insulating sheath cylinder 6 has a lower temperature than the electrode water ε in the base electrode 3 because the cooled supply water β is always sent thereto.

In the case of water resistor C, the supply water α is vigorously discharged upward from the water outlet 10 of the insulating support 4 along the high-voltage main electrode 5, so that the discharged low-temperature water is transferred to the high-voltage main electrode 5 with the momentum of the discharge.
When the insulating sheath B6 is lowered, the electrode water ε inside the insulating sheath cylinder 6 is forced into the inside from the lower end of the insulating sheath cylinder 6. 3
The temperature is lower than that of the electrode water ε inside.

As a result, the current density between the high-voltage main electrode 5 and the base electrode 3 increases as it approaches the center.
is constantly exposed to low-temperature water and the surface and surrounding water are cooled, so the surface temperature of the high-voltage main electrode 5 rises rapidly and bubbles are generated, causing an arc α between the high-voltage main electrode 5 and the base electrode 3. The occurrence of discharge is suppressed as much as possible.

Even if an arc α discharge occurs, the lower end of the insulating sheath cylinder 6 is protected by the fine ceramic cylinder ring 8, so that the insulating effect will not deteriorate due to burnout.

(3) Effects of the invention Thus, in the present invention, the high voltage main electrode 5 and its surrounding water are constantly cooled by the cooled supply water β and γ by a simple and low-cost method and means, so that the high temperature of the high voltage main electrode 5 increases. There are almost no major accidents due to arc discharge due to insulation breakdown, and even if arc discharge occurs, the lower end of the insulation sheath cylinder 6 will not be burned out, so insulation will not deteriorate even in subsequent use. It is highly durable because it is not carried around, and the insulating sheath 11
The replacement work for the top of the 9S6 furnace is drastically reduced, maintenance and inspection work becomes easier, and safety, security, and reliability are improved.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a central vertical sectional view showing the first embodiment of the present invention, and Fig.
The figure is a central vertical cross-sectional view showing the same second embodiment, and FIG. 3 is a central vertical cross-sectional view of a conventional water resistor. A, B, C... Water resistor α... Arc β, γ... Supply water 3...
・Base electrode 4...Insulating support 5...High voltage main electrode 6...Insulating sheath cylinder 7.10...Water outlet 8...Fine ceramic cylinder ring Fig. 1 Fig. 2

Claims (1)

[Scope of Claims] 1. A cylindrical base electrode with a bottom that stores a predetermined amount of water that is circulated therein, and an insulating support that is erected through the bottom center of the base electrode. , a cylindrical high-voltage main electrode to which the power cable of the power supply device is connected at its outgoing lower end;
In a water resistor comprising an insulating sheath covering the high voltage main electrode, which is suspended so as to be movable up and down in order to adjust the exposed length of the high voltage main electrode, the cooled circulating supply water flows outside the high voltage main electrode. Method 2 for preventing arc discharge in a water resistor in which water is cooled on the outer surface of the high-voltage main electrode and surrounding water by spraying water so as to directly touch the surface, and a bottom is provided for storing a predetermined amount of circulatingly supplied water inside. a cylindrical base electrode; a cylindrical high-voltage main electrode that extends through an insulating support stuck to the center of the bottom of the base electrode and contacts a power cable of a power supply device at the lower end of the base electrode;
In a water resistor comprising an insulating sheath tube that covers the high voltage main electrode and is suspended so as to be movable up and down to adjust the exposed length of the high voltage main electrode, the upper part of the insulating sheath tube and the upper end of the insulating support A water resistor comprising a water outlet for the cooled circulating supply water provided at an appropriate location on at least one side.