JPH0726801Y2 - Liquid resistor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an externally cooled liquid resistor, and more specifically, a high temperature liquid is extracted from the upper part of a resistor tank in which electrodes are arranged and cooled by an external cooling means. The present invention relates to an improvement of a liquid resistor which is returned to the lower part after being opened and jetted into a tank as a low temperature liquid from a nozzle.

[Prior art]

Conventionally, a liquid resistor utilizing the resistance of a liquid such as water has been used as a large-capacity resistor. The liquid resistor has a plurality of electrodes, for example, two electrodes, inserted and arranged in a resistor tank containing a liquid, and the resistance value is changed by changing the electrode interval.

When a current is passed through the liquid resistor, Joule heat proportional to the square of the current is generated to raise the temperature of the liquid between the electrodes, so that the heated liquid accumulates and accumulates in the upper part of the tank. Therefore, the temperature is kept constant by installing a circulation cooling system that draws high temperature liquid from the upper part of the resistor tank, cools it with an external cooling means, returns it to the lower part, and jets it again as low temperature liquid into the tank from the nozzle. Was.

FIG. 3 is a flow chart for explaining such a conventional liquid resistor, in which a resistor tank 2 containing a liquid 1 is provided with electrodes 3
The plate-shaped electrodes 3 are arranged in parallel at a predetermined interval in the direction perpendicular to the paper surface, and the interval can be changed by an appropriate moving device. The high temperature liquid in the tank 2 is extracted from the upper part by a pipe 4 and introduced into an external cooling means 6 by a pump 5. Cooling means 6
The low-temperature liquid obtained by cooling with is supplied to the nozzle 8 provided in the lower part of the resistor tank 2 through the pipe 7, and upwards from the numerous ejection holes provided in the upper part of the nozzle 8 as shown by arrows. Are dispersed and jetted. Although only one nozzle 8 is shown in the drawing, a plurality of nozzles 8 are normally arranged at equal intervals in the direction perpendicular to the paper surface so as to be branched from the pipe 7.

In addition, the water resistance power test device described in the microfilm of Japanese Utility Model Publication No. 56-78405 uses a high temperature liquid to flow from an upper part of an industrial water storage tank where a discharge electrode plate is placed into an annular gutter, and an external cooling means is used. After cooling, it is returned to the lower part and discharged into the water tank as a low temperature liquid by an industrial fountain nozzle.

In addition, the water resistor described in the microfilm of Jitsukai Sho 60-37206 opens a water supply pipe in the center of a circular tank and installs a perforated straightening plate above it to prevent the upper surface of the tank from undulating. is doing.

[Problems that the device is trying to solve]

However, in the conventional first liquid resistor, since the low temperature liquid is directly jetted upward from the nozzle in the lower portion of the tank, the electrode is swung under the influence of the liquid jet flow and the resistance value is changed. However, in some cases, a short circuit may occur between the electrodes. In this respect, the third conventional technique is provided with a straightening plate made of a perforated plate and is formed so as to cover the lower end portion of the tank over the front surface, so that there is an effect that the swinging of the electrode can be prevented to some extent. There is a problem. That is, this type of liquid resistor is generally used as a large-capacity power resistor, and generally has an extremely large tank. Therefore, it is troublesome to take a structure in which the entire lower surface thereof is covered with a porous plate. Further, in a relatively large tank, when water is supplied from the center, even if a porous straightening plate is provided, there is a drawback that the flow velocity in the center portion becomes large.

Therefore, an object of the present invention is to solve the problems of the conventional liquid resistor, and to provide a stable liquid resistor having an extremely simple structure and free from the risk of resistance change and electrode short circuit. It is a thing.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the liquid resistor of the present invention draws high-temperature liquid from the upper part of the resistor tank in which the electrodes are arranged, cools it by an external cooling means, and returns it to the lower part of the resistor tank. In a liquid resistor adapted to be ejected into the tank as a dam, a weir-like overflow tank provided on the upper part of the resistor tank 2.
11 and the high temperature liquid is supplied from the overflow tank 11 to the nozzle 8 through a pipe and the cooling means. The nozzle 8 is an elongated tube body horizontally inserted in the lower portion of the resistor tank. A large number of ejection holes 12 are arranged so as to be spaced apart from each other, and a buffer plate 14 is arranged in close proximity to the upper side of the pipe body and in parallel with and facing the pipe body. Buffer means 13 is provided so that the jetted low-temperature liquid collides with the buffer plate 14 and is redirected laterally.
Is provided.

[Action]

The liquid resistor of the present invention comprises a plurality of ejection holes 12 spaced apart from each other in an elongated tube body in which a nozzle is horizontally inserted in a resistor tank. Since the low temperature liquid ejected to the buffer plate 14 collides with the buffer plate 14 and is redirected to the side, the jet flow flowing out of the nozzle hardly affects the electrode with a very simple structure.

In addition, this liquid resistor overflows and draws out the liquid in the upper layer and ejects it from the nozzle in the lower lateral part to buffer the jet of the low temperature liquid, so that it can be used in both the upper and lower layers in the tank. The effect of stabilizing the electrode and preventing the variation of the resistance value is achieved.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a flow chart for explaining an example of the liquid resistor of the present invention, and the same devices as those in FIG. 3 described above are designated by the same reference numerals. In FIG. 1, an overflow section 9 is provided above the resistor tank 2, and an overflow tank 11 is provided adjacent to the dam plate 10 side where the overflow section 9 is located. A guide plate 16 is arranged at the upper end of the barrier plate 10 with a slight inclination from the horizontal. Also, overflow tank
A pipe 4 for extracting high temperature liquid is connected to the lower part of 11. Since the overflow tank 11 only needs to temporarily store the overflowed high temperature liquid, a relatively small capacity is sufficient.

On the other hand, as shown in FIG. 2, a large number of ejection holes 12 are provided dispersedly in the longitudinal direction at the upper part of the low temperature liquid nozzle 8 provided at the lower part of the resistor tank 2, and the jet liquid is buffered. means
13 are provided. The illustrated buffering means 13 is an example including a buffering plate 14 having a function of colliding and dispersing the jet liquid, and a connecting portion 15 for connecting the plate 14 to the upper portion of the nozzle 8 at an appropriate interval. Not limited to
Other types may be used as long as they are buffered by the collision and dispersion of the jet liquid.

In the liquid resistor shown in FIG. 1, the low-temperature liquid ejected from the ejection hole of the nozzle 8 collides with the buffer means 13 and is dispersed, and then becomes a gentle and uniform flow to rise in the tank as shown by the arrow. . On the other hand, the liquid 1 in the resistor tank 2 rises in temperature due to the Joule heat generated by the current between the electrodes 3 to become a high temperature liquid, and an amount commensurate with the supply amount from the nozzle 8 is passed from the overflow portion 9 via the guide plate 16. It gently flows into the overflow tank 11. Air is cooled to some extent on the guide plate 16,
The high temperature liquid extracted from the lower portion of the overflow tank 11 through the pipe 4 is introduced into the cooling means 6 by the pump 5, and the low temperature liquid obtained by cooling here is supplied again to the nozzle 8 through the pipe 7.

[Effect of device]

The liquid resistor of the present invention has a nozzle in which a large number of ejection holes 12 are arranged apart from each other in an elongated tube body horizontally inserted in a resistor tank, and the nozzles are dispersed upward from the plurality of ejection holes. Since the jetted low-temperature liquid collides with the buffer plate 14 and is redirected to the side, the jet stream flowing out of the nozzle hardly affects the electrode with a very simple structure.

Moreover, this liquid resistor overflows and draws out the liquid in the upper layer, and ejects it from the nozzle at the bottom of the tank to buffer the jet of low-temperature liquid. The effect of stabilizing the electrode and preventing the variation of the resistance value is achieved.

[Brief description of drawings]

FIG. 1 is a flow chart for explaining an example of the liquid resistor of the present invention, and FIG. 2 is a nozzle 8 and buffer means in FIG.
FIG. 13 is an enlarged perspective view of 13, and FIG. 3 is a flow chart for explaining a conventional liquid resistor. 1 ... Liquid, 2 ... Resistor tank 3 ... Electrode, 4 ... Piping 5 ... Pump, 6 ... Cooling means 7 ... Piping, 8 ... Nozzle 9 ... Overflow part 10 ... Dam 11 ...... Overflow tank 12 …… Spout hole, 13 …… Cushioning means 14 …… Cushion plate, 15 …… Coupling section 16 …… Guide plate

Claims (1)

[Scope of utility model registration request] 1. A high temperature liquid is extracted from an upper portion of a resistor tank in which electrodes are arranged, cooled by an external cooling means, returned to the lower portion of the resistor tank, and jetted as a low temperature liquid from a nozzle into the tank. In the liquid resistor, a weir-shaped overflow tank provided on the upper portion of the resistor tank 2
The high-temperature liquid is supplied to the nozzle 8 from the overflow tank 11 through a pipe and the cooling means, and the nozzle 8 is provided in a long thin tube horizontally inserted in the lower portion of the resistor tank. The ejection holes 12 of are arranged so as to be spaced apart from each other, and a buffer plate 14 is arranged in close proximity to the upper portion of the pipe body and in parallel with the pipe body and ejected upward from the ejection hole 12. The buffer means 13 is provided so that the low temperature liquid collides with the buffer plate 14 and is redirected laterally.
A liquid resistor, wherein the liquid resistor is provided.