JP2617842B2 - Stone electrical destruction equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for electrically destroying stones at a large-scale site such as tunnel construction and dam construction by electric energy.

[0002]

2. Description of the Related Art Conventionally, a device for destroying an electrically insulative object such as a stone by electric energy, as shown in FIG. 4 is pressed against the breaking point of the stone 3 by a load F, and an AC, DC or pulse voltage is applied between the needle electrode 4 and the auxiliary electrode 5 in the liquid tank 1 by a power source 6 to A spark is generated at the tip and the stone 3 is destroyed.

At this time, the relationship between the voltage V applied to both electrodes 4 and 5 and the current I shows an N-shaped characteristic as shown in FIG. In the figure, the area between OA is an electrolysis phenomenon via the chemical liquid, and is an area where the chemical liquid is decomposed and a component gas is generated together with the decomposition of the chemical liquid near the tip of the needle electrode 4. Further, the area between AB is a region where the generated gas becomes remarkable and the chemical liquid at the tip of the needle electrode 4 boils, thereby causing a spark discharge. Further, the area between BC is an area where spark discharge becomes intense as the applied voltage V increases, and in this area, the stone 3 is destroyed.

The needle electrode 4 vibrates due to a discharge force,
A pressing force, that is, a load F is required for the needle electrode 4 in order to prevent the concentration of energy at the breaking point from being hindered.

[0005]

The conventional breaking apparatus requires a liquid tank 1 for immersing the stone 3 and is intended for small pieces of the stone 3, and its application range is limited.
At a large-scale site such as tunnel construction or dam construction, it is impossible to set the chemical solution 2 and the auxiliary electrode 5. Furthermore, continuous destruction cannot be performed, and remote operation is difficult.

The present invention has been made in view of the above points, and has as its object to provide an electrical destruction device for stone which can be applied to large-scale sites and the like.

[0007]

Means for Solving the Problems In order to solve the above problems, an apparatus for electrically destroying a stone material according to the present invention comprises:
In a device for electrically destroying stone at a large-scale site such as a dam construction, a conductive chemical solution contained in a liquid tank, a pump for supplying the chemical solution to a pressure intensifier, and a chemical solution from the pressure intensifier are used. A metal nozzle that jets out and projects it as a continuous stream onto the stone surface, and a high melting point material with a small work function that is pulled out from a wound reel and whose tip is pressed against the point of projection of the chemical liquid on the stone surface and has a small work function A thin metal wire which is easy to apply, a power source for applying an AC or DC or pulsed voltage between the metal nozzle and the metal thin wire, and breaking the stone material surface by spark discharge from the tip of the metal thin wire; A high-pressure unit provided in the pressure intensifier tube and configured to increase a pressure of the chemical liquid ejected from the metal nozzle to remove the broken debris. Is shall.

[0008]

According to the apparatus for electrically destroying stones of the present invention constructed as described above, the chemical liquid in the liquid tank is ejected from a metal nozzle through a pressure intensifier tube provided with a pump and a high-pressure unit and continuously flows on the stone surface. The tip of the thin metal wire that is projected as a reel is pressed against the projection point of the chemical liquid on the stone surface, and the stone surface is discharged between the metal nozzle and the thin metal wire by spark discharge from the tip of the thin metal wire. Since a destructive power supply is applied, spark discharge occurs from the tip of the thin metal wire, and the discharge destroys the stone material, eliminating the need for a conventional liquid tank and requiring large-scale operations such as tunnel construction and dam construction. Can be easily applied in the field.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, FIG. 1 showing a schematic diagram of the present invention will be described. The conductive chemical liquid 8 is ejected from the metal nozzle 7 and projected onto the surface of the stone 9, and the metal fine wire 10 is pressed against the liquid projection point on the surface of the stone 9, and the metal nozzle 7 and the metal fine wire 1 are pressed.
Between 0 and 0, an AC, DC or pulsed voltage is applied by the power supply 11. Therefore, the stone 9 is destroyed by the spark discharge from the tip of the thin metal wire 10.

In this case, the chemical liquid 8 must be ejected from the metal nozzle 7 in a continuous flow because the chemical liquid 8 functions as a power supply line. The thin metal wire 10 is a material having a high melting point and a small work function, which facilitates discharge. The diameter of the thin wire is preferably 1 mm or less to concentrate the discharge points.

Next, an embodiment of the present invention will be described with reference to FIG. The chemical liquid 8 in the processing liquid tank 12 is supplied to the pressure intensifier pipe 14 by the pump 13, and the chemical liquid 8 intensified by the pressure intensifier pipe 14 is ejected from the metal nozzle 7. At this time, a high-pressure unit 15 is provided in the intensifier tube 14 so that the ejected liquid removes debris.

As the thin metal wire, a consumable φ1 mm Cu-based alloy wound on a reel 16 is used.
To supply.

On the other hand, an AC power supply 18 as a power supply 11 is half-wave rectified through a secondary winding 20 and a rectifier 21 of a transformer 19, and the half-wave rectified output for sustaining discharge is supplied to a metal nozzle 7 and a metal. The voltage is applied between the thin wire 10 and the capacitor 25 via the high voltage tertiary winding 22, the rectifier 23, and the resistor 24 of the transformer 19, and the charging voltage is superimposed on the rectified output to electrostatically. A storable dependent impulse is formed. In addition, the charging voltage of the battery 25 is 800V.

Next, an experimental example will be described. The metal nozzle used was Cu as a material, the nozzle diameter was φ3 mm, and the thin metal wire was thorium-containing tungsten of φ1 mm. Granite and ceramics (Si3N4
), KOH was used as the chemical liquid, and the ejection pressure from the metal nozzle was adjusted to 0.05 to 0.1 kgf / cm @ 2, and ejection was performed from a position 50 mm above the breaking point of the stone. The thin metal wire was pressed against the breaking point at an angle of 20 to 30 degrees with the chemical liquid flow so that the pressing force of 5 to 20 gf was constant. At this time, the length of the tip of the thin metal wire immersed in the chemical solution was 2 to 3 mm, and an AC voltage was applied to the thin metal wire and the metal nozzle.

In this case, sparks started to be generated at about 30 V, and destruction and removal of the stone material were observed at about 40 V. The destructive force increased as the voltage increased. In the case of a 2 mmt ceramic plate, it was broken at 100 to 150 V. On the other hand, the consumption of the thin metal wire is remarkable at about 30 V due to electrolytic action.
At 50 to 80 V, where the distribution of discharge energy starts to increase, the consumption decreased. When the voltage exceeded 80 V, the wear increased again as the voltage increased. 450mm for 5mmt granite
It broke at ~ 500V.

[0015]

Since the present invention is configured as described above, it has the following effects. The chemical liquid in the liquid tank is ejected from a metal nozzle through a pressure intensifier provided with a pump and a high-pressure unit, and is projected as a continuous flow on the stone surface.
The tip of the fine metal wire drawn from the reel is pressed against the chemical liquid projection point on the stone surface, and between the metal nozzle and the thin metal wire, there is a power supply that destroys the stone surface by spark discharge from the tip of the fine metal wire. Since the applied material is applied, the stone material is destroyed by the generated spark discharge, so that there is no need for a conventional liquid tank for immersing the stone material.

In addition, since the thin metal wire is used as one electrode to which power is applied, sufficient discharge energy can be obtained with low resistance, and a strong spark discharge can be generated to destroy the stone material. In addition, it is only necessary to sequentially pull out the thin metal wires from the reels, and it is not necessary to replace auxiliary electrodes as in the related art.

In addition, the direction in which the chemical liquid is sprayed from the metal nozzle and the direction in which the fine metal wire is pressed can be easily changed, and the stone can be destroyed in all postures.

Further, a neutral salt can be used as the chemical liquid,
Groundwater and river water at large sites such as tunnels and dam construction can be used, and wastewater treatment is easy.

Further, by mounting a remote control and a monitor camera, a robot can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic view of an apparatus for electrically breaking stone according to the present invention.

FIG. 2 is a configuration example of one embodiment of the present invention.

FIG. 3 is a cutaway front view of a conventional example.

FIG. 4 is a relationship diagram between an applied voltage and a current.

[Explanation of symbols]

 7 Metal nozzle 8 Chemical liquid 9 Stone material 10 Metal wire 11 Power supply 12 Liquid tank 13 Pump 14 Intensifier tube 15 High pressure unit 16 Reel

Continued on the front page (72) Inventor Mamoru Abe 3-3-22 Nakanoshima, Kita-ku, Osaka-shi Kansai Electric Power Co., Inc. (72) Inventor Hidehiko Maebata 5-28-3, Nishikujo, Konohana-ku, Osaka-shi In-house (72) Inventor Hironari Arai 5-2-2, Nishikujo, Konohana-ku, Osaka-shi Inside Tachibashi Shipbuilding Co., Ltd. In-company (72) Inventor Masanori Tsukahara 5-3-28 Nishikujo, Konohana-ku, Osaka-shi Inside Tachibana Shipbuilding Co., Ltd. (56) References JP-A-59-224216 (JP, A) JP-A-59-223282 ( JP, A)

Claims (1)

(57) [Claims] [Claim 1] Large-scale operation of tunnel construction, dam construction, etc.
In an electrical destruction apparatus for stones in a field, a conductive chemical liquid stored in a liquid tank , a pump for supplying the chemical liquid to a pressure booster pipe, and a chemical liquid from the pressure booster pipe are continuously ejected onto the stone surface. Flow
The nozzle is pulled out from the wound reel and the tip is pulled out of the stone material table.
A high melting point material pressed against the projection point of the chemical liquid on the surface
AC or DC between the metal nozzle having a small work function and easy discharge, and the metal nozzle and the metal wire.
Alternatively, a pulse-like voltage is applied to the tip of the fine metal wire.
A power supply for breaking the stone surface by spark discharge from, provided on the boosted pressure pipe, is projected on the stone surface wherein
The chemical liquid is used to remove the broken debris from the metal.
An electrical destruction apparatus for stone material, comprising: a high-pressure unit for increasing a pressure ejected from a nozzle .