JP2006205114A - Electrode for device for discharge crushing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical electrode for a device for discharge crushing, with a simple structure and easy production, easily generating discharge. <P>SOLUTION: In the electrode for the device for discharge crushing, a pressure wave is generated by making an electrolyte to plasma by imparting a discharge energy to the electrolyte provided on an inner side of an object to be crushed through the electrode and the object to be crushed is crushed by the pressure wave. One end 4 of a conductor rod 2 is bent in a direction of the other end 5 of the conductor rod 2 and both ends of the conductor rod 2 are retained in the insulation state each other by an insulation retaining member 8. A discharge gap 18 for generating discharge by cutting the conductor rod 2 and making the cutting surface 9 and the cutting surface 9 opposed to each other is formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electrode for an electric discharge crusher, and relates to an electrode having a structure that is simple and easy to manufacture, and that easily causes discharge.

An electric discharge crushing method using an electric discharge crushing device to crush destruction objects such as rocks and concrete is known (Patent Documents 1 and 2). As shown in FIG. 7, an electrolytic solution filling hole 61 is previously formed in the destruction target 60, and an electrolytic solution 63 such as water is filled in the electrolytic solution filling hole 61 to discharge into the electrolytic solution 63. The electrode 70 of the crushing device 50A is inserted, and a large current pulse is applied to the electrode 70 to cause discharge. Since the electrolytic solution 63 is turned into plasma by the discharge energy and generates a pressure wave, the destruction target 60 is crushed by crushing the periphery of the electrolytic solution filling hole 61 with the pressure wave. The discharge crushing device 50A is connected to a pulse power source 80 composed of a circuit having a capacitor 82 and switches 83 and 84 having a large capacity (for example, about 500 kJ) and one pole 82a of the capacitor 82 and A power source 81 such as a generator connected to the other pole 82b via the switch 83, one electrode connected to one pole 82a of the capacitor 82, and the other pole 82b of the capacitor 82 via the switch 84. The other electrode connected and the electrode 70 formed with the insulator which insulates these one electrode and the other electrode are provided. The pulse power source 80 and the electrode 70 are connected via a coaxial cable 71 and a connector part 72. Although not shown, the circuit of the pulse power source 80 is grounded.
As shown in FIGS. 7 and 8, the electrode 70 includes an inner conductor shaft 73 constituting one electrode, a cylindrical insulator 74 covering the outer periphery of the inner conductor shaft 73, and an outer periphery of the cylindrical insulator 74. The outer conductor 75 that is provided and forms the other electrode is formed coaxially. The outer conductor 75 is formed by a plurality of outer conductor constituting bodies 76 provided at intervals in a direction along the axis of the inner conductor shaft 73. A distal-end-side discharge gap 77 that generates a discharge between the distal end portion 73t of the inner conductor shaft 73 that protrudes from the distal end 74t of the cylindrical insulator 74 and the distal end portion 76t of the external conductor constituting body 76 that is closest to the distal end portion 73t. An intermediate discharge gap 78 is formed, and discharge is generated between the end portion 76s and the end portion 76s of the opposing outer conductor structure 76. A plurality of intermediate discharge gaps 78 are formed.
After the electrode 84 is inserted into the electrolyte solution 63 in the electrolyte solution filling hole 61 of the object 60 to be destroyed while the switch 84 and the switch 83 are in a non-conductive state, the switch 83 is turned on to connect the capacitor 82 to the capacitor 82 from the power supply unit 81. Accumulate charge. Then, when the switch 84 is turned on and the electric charge stored in the capacitor 82 is applied to the electrode 70, a discharge is generated in the tip-side discharge gap 77, and the electrolytic solution 63 is turned into plasma by this discharge energy to generate a pressure wave. Similarly, discharge is generated in the plurality of intermediate discharge gaps 78, and the electrolytic solution 63 is turned into plasma by this discharge energy to generate pressure waves. The destruction target 60 is crushed by these pressure waves.

  Also, using two single-core insulated wires coated with a conductor such as copper with an insulator, these two single-core insulated conductors are twisted together and the two single-core insulated conductors are reinforced fiber tape or the like. There is also known an electrode that is fixed by a fixing member, one single-core insulated wire is cut at a plurality of locations, and a discharge gap is formed between the cut surface and the cut surface (Patent Document 3).

However, the coaxial electrodes disclosed in Patent Documents 1 and 2 have a complicated structure, increase costs, and are economically disadvantageous. Further, the electrode shown in FIG. 14 of Patent Document 3 is inferior in durability because it is formed by twisting two single-core insulated conductors together. In order to improve the durability, an electrode having a strand configuration as shown in FIG. 2 of Patent Document 3 (an electrode formed by a bundle formed by twisting a plurality of single-core insulated conductors) is also complicated in structure. The cost is high and it is economically disadvantageous. In addition, since each of the electrodes has a complicated structure, it takes time to manufacture. Further, in each of the electrodes, since the end faces of the conductors forming the discharge gap at the tip of the electrode for generating the first discharge are not opposed to each other, it is difficult to generate the discharge.
JP 2003-31175 A JP 2003-320268 A Japanese Patent Application Laid-Open No. 2003-299979

  The problem to be solved by the invention is that the electrode of the conventional electric discharge crushing apparatus has a complicated structure, is economically disadvantageous, takes time to manufacture, and does not easily cause discharge.

The present invention is a discharge crushing in which a pressure wave is generated by applying discharge energy to an electrolytic solution provided on the inner side of an object to be destroyed through an electrode to generate a pressure wave and crushing the object to be destroyed by the pressure wave. In the electrode of the device, one end of the conductor rod is bent in the direction of the other end of the conductor rod, both ends of the conductor rod are held insulated from each other by the insulating holding member, and the conductor rod is cut and cut from this cut surface It is characterized in that a discharge gap is formed so as to face the surface and generate a discharge. In addition, a discharge crushing device that generates a pressure wave by applying discharge energy to an electrolytic solution provided inside an object to be destroyed through an electrode to convert the electrolyte into plasma and crushing the object to be destroyed with the pressure wave In the electrode, one end of the conductor rod is bent in the direction of the other end of the conductor rod, and the one end side and the other end side of the conductor rod are insulated at a plurality of locations spaced along the extending direction of the conductor rod. It is also characterized in that a discharge gap is formed which is held in an insulated state by the holding member, and the conductor bar is cut to cause discharge by causing the cut surface and the cut surface to face each other.
The one end side and the other end side of the conductor bar are held in an insulated state by the insulating holding member at positions close to each other at a plurality of positions spaced along the extending direction of the conductor bar, or the insulating holding member 1 or less of the conductor rod between the insulating holding member is cut to form a discharge gap of 1 or less between the insulating holding member and the insulating holding member, or the insulating holding member is on one end side of the conductor rod. And the other end side are detachably formed, the end surfaces of the cutting surfaces facing each other are formed in a sharp shape, and a cartridge that stores the discharge gap and is filled with the electrolyte is provided. Also features.

According to the present invention, an electrode can be formed with a single conductor rod, which is durable, can have a simple structure, and can be easily produced. Moreover, since the discharge gap with the cut surfaces facing each other is provided, it becomes easy to generate a discharge, and the efficiency of the crushing operation by the discharge crushing apparatus can be improved. In addition, the insulating holding member can increase the effect of maintaining the shape of the conductor rod, and an electrode that can maintain the accuracy of the discharge gap can be obtained.
Since the one end side and the other end side of the conductor rod are held in an insulated state by the insulating holding member at a plurality of locations spaced along the extending direction of the conductor rod, the shape of the conductor rod is maintained. The effect, the accuracy of the discharge gap, and the durability of the electrode can be further improved.
Since the structure is such that one end side and the other end side of the conductor rod are held in an insulated state by the insulating holding member at positions close to each other at a plurality of positions spaced apart along the extending direction of the conductor rod. The rod shape maintaining effect, the accuracy of the discharge gap, and the durability of the electrode can be further improved.
By having a configuration in which one or less portions of the conductor rod between the insulating holding member and the insulating holding member are cut to form a discharge gap of 1 or less between the insulating holding member and the insulating holding member, It is possible to provide an electrode capable of improving the harmony between the shape maintaining effect and the number of discharge gaps, that is, the shape maintaining effect of the conductor rod, and increasing the discharge location and improving the efficiency of the crushing operation by the discharge crushing apparatus.
By using an insulating holding member that is detachably formed on one end side and the other end side of the conductor rod, the electrode can be easily manufactured.
By forming the end surfaces of the cut surfaces facing each other in a sharp shape, the electric field at the end surfaces formed in the sharp shape is increased and discharge is easily generated, so that the discharge efficiency can be improved.
Since the cartridge that accommodates the discharge gap and is filled with the electrolytic solution is provided, an electrode that can be used even when the electrolytic solution cannot be retained in the electrolytic solution filling hole of the object to be destroyed can be obtained.

Embodiment 1
FIG. 1 shows a discharge crushing apparatus according to Embodiment 1, FIG. 2 shows a structure of a conductor rod forming an electrode of the discharge crushing apparatus, and FIG. 3 shows a cross section of an example of an insulating holding member. 7 that are the same as or correspond to those in FIG.

  The electrode 1 of the electric discharge crushing apparatus of Embodiment 1 is formed by bending one conductor rod 2 with an intermediate point 3 as a boundary as shown in FIG. As the conductor rod 2, for example, a wire made of iron, copper, noble metal, alloy or the like and having a diameter of about 5 mm is used. That is, one end 4 of the conductor bar 2 is folded back in the direction of the other end 5 of the conductor bar 2 with respect to the intermediate point 3 with respect to one conductor bar 2, and the conductor bar 2 is separated from the bent part 6 of the intermediate point 3. The one end side 40 and the other end side 50 are crossed at a plurality of locations. One end side 40 and the other end side 50 of the conductor rod 2 are insulated and held by the insulating holding member 8 at the plurality of intersections 7. Then, one end side 40 (or the other end side 50) of the conductor rod 2 is cut at a plurality of locations, and a plurality of discharge gaps 10 are formed to cause discharge by causing the cut surface 9 and the cut surface 9 to face each other. . The discharge gap 10 is set to about several mm. In FIG. 1, the second insulating holding members 8 b and 3 from the tip of the electrode 1 between the bent portion 6 that becomes the tip of the electrode 1 and the insulating holding member 8 a provided at the closest position to the bent portion 6. The one end side 40 of the conductor rod 2 was cut at a total of three positions between the fourth insulating holding member 8d and the fifth insulating holding member 8e from the tip of the electrode 1 between the first insulating holding member 8c and the fourth insulating holding member 8c. The electrode 1 is shown. In this case, the discharge gap 10 is not formed at all locations between the insulating holding members 8, 8, and the discharge gap 10 is formed every time between the insulating holding members 8, 8. The shape maintaining effect can be enhanced, the highly accurate electrode 1 that can maintain the accuracy of the discharge gap 10 can be provided, and since a plurality of discharge gaps 10 are provided, the number of discharge points can be increased and the discharge energy can be increased. Thus, the crushing force by the pressure wave can be improved.

  If the discharge gaps 10 are formed at all locations between the insulating holding members 8 and 8, the number of the discharge gaps 10 can be further increased, the number of discharge locations can be increased, and the discharge energy can be increased. The crushing force by pressure waves can be improved. That is, if the discharge gap 10 provided at all locations between the insulating holding members 8 and 8 is 1 or less, the shape maintaining effect of the conductor rod 2 by the conductor rod 2 and the insulating holding member 8 can be achieved, and it can be used practically. The electrode 1 to be obtained can be obtained. When one discharge gap 10 is provided at every location between the insulating holding members 8, 8, if the discharge gap 10 is provided only at one end side 40 or only at the other end side 50 of the conductor rod 2, The effect of maintaining the shape of the conductor rod 2 by the insulating holding member 8 can be improved.

  The insulating holding member 8 is formed of, for example, rubber, plastic or the like as shown in FIG. That is, the insulating holding member 8 is detachably formed at one end side 40 and the other end side 50 of the conductor rod 2 at the intersection 7, specifically, the openings 21, 22 and the openings 21, A holding portion 25 having holding portions 23 and 24 for separately taking in and holding the one end side 40 and the other end side 50 of the conductor rod 2 via 22 and a cap for closing the openings 21 and 22 of the holding portion 25 26. When the insulating holding member 8 is attached to the intersection point 7, the one end side 40 and the other end side 50 of the conductor rod 2 at the intersection point 7 are sandwiched by the holding portions 23 and 24 through the openings 21 and 22 of the holding portion 25, respectively. And the outer circumferences of the one end side 40 and the other end side 50 are sandwiched between the sandwiching portions 23 and 24 and are held in an insulated state. Then, the locking piece 27 of the cap 26 is locked to a locking portion 28 provided around the outer edges of the openings 21 and 22 to close the openings 21 and 22. As described above, since the one end side 40 and the other end side 50 of the conductor rod 2 can be easily insulated and held at the plurality of intersections 7 by the easily removable insulating holding member 8, the electrode 1 can be easily produced. In addition, since the one end side 40 and the other end side 50 of the conductor rod 2 are held by the insulating holding member 8 at the plurality of intersections 7, the shape of the electrode 1 can be maintained and the accuracy of the discharge gap 10 can be maintained.

  Note that the one end side 40 and the other end side 50 of the conductor rod 2 at the intersection 7 may be insulated and held with an insulating adhesive.

  The rear end of the electrode 1, that is, the one end 4 and the other end 5 of the conductor rod 2 are electrically connected to the electrode side connector 11 and are mechanically held by the electrode side connector 11. Therefore, the shape maintaining effect of the conductor rod 2 is improved by the electrode side connector 11. A negative electrode line 13 and a positive electrode line 14 from a pulse power source 80 are connected to a connection connector 12 detachably connected to the electrode side connector 11. Therefore, by connecting the electrode side connector 11 and the connection connector 12, for example, one end 4 of the conductor rod 2 is connected to the negative electrode wire 13, and the other end 5 of the conductor rod 2 is connected to the positive electrode wire 14. The negative electrode wire 13 and the positive electrode wire 14 may be formed of a coaxial cable. A power supply unit 81 is connected to the pulse power source 80 via the power cable 15.

  When the electrode 1 is inserted into the electrolytic solution 63 filled in the electrolytic solution filling hole 61 of the object 60 to be destroyed, and a large current pulse is applied to the electrode 1 by operating the pulse power source 80, a plurality of discharge gaps 10 are generated. Electric discharge is generated, and the electrolytic solution 63 in the electrolytic solution filling hole 61 is turned into plasma by the discharge energy to generate a pressure wave, whereby the destruction target 60 can be crushed.

  In the first embodiment, since the electrode 1 is formed from one conductor rod 2, the structure is simple and the electrode 1 can be easily created. Further, the insulating holding member 8 can enhance the shape maintaining effect of the conductor rod 2. Moreover, since the middle part of the conductor rod 2 can be cut, the cut surfaces can be made to face each other, and the discharge gap 10 that is likely to cause discharge can be formed, so that the discharge efficiency is improved and the crushing force by the pressure wave can be improved. . That is, the efficiency of the crushing operation by the electric discharge crusher can be improved.

Embodiment 2
In the first embodiment, one end side 40 and the other end side 50 of the conductor rod 2 are crossed at a plurality of locations, and the one end side 40 and the other end side 50 of the conductor rod 2 at the intersection 7 are held by the insulating holding member 8. However, the one end side 40 and the other end side 50 of the conductor rod 2 are merely brought close to each other without intersecting at a plurality of locations, and the one end side 40 and the other end side 50 of the conductor rod 2 in this approaching portion are insulated. You may hold | maintain with the holding member 8. FIG. Even if it does in this way, the shape maintenance effect of the conductor rod 2 can be heightened.

Embodiment 3
As shown in FIG. 4, it is good also as the electrode 1 provided with the cartridge 30 which accommodates the discharge gap 10 and is filled with the electrolyte solution 63. As shown in FIG. Depending on the destruction target 60, there is a case where even if the electrolyte filling hole 61 is filled with the electrolyte solution 63, it penetrates into the destruction target 60 and cannot be held in the electrolyte filling hole 61. In such a case, the electrode 1 with the cartridge 30 is inserted into the electrolytic solution filling hole 61 of the object 60 to be destroyed while the electrolytic solution 63 is filled in the cartridge 30 using the electrode 1 with the cartridge 30. The target object 60 can be crushed by discharging. The cartridge 30 is a storage body formed of rubber, plastic, or the like, and has a sealing portion 31 at the top, and after the electrolytic solution 63 and the discharge gap 10 portion of the electrode 1 are placed inside, the sealing portion 31 The inner periphery and the outer periphery of the insulating holding member 8 of the electrode 1 are adhered with an adhesive tape or an adhesive (not shown), and the upper portion of the cartridge 30 is sealed for use.

Embodiment 4
In the above description, the one end side 40 and the other end side 50 of the conductor rod 2 are crossed at a plurality of locations, and the one end side 40 and the other end side 50 are held together by the insulating holding member 8 at the plurality of intersections 7. As shown in FIG. 5, after one end of the conductor bar 2 is folded back in the direction of the other end 5 of the conductor bar 2 with respect to the intermediate point 3 as one conductor bar 2, one end of the conductor bar 2 facing in a straight line The electrode in which the discharge gap 10 is formed by cutting the one end side 40 or the other end side 50 of the conductor rod 2 after the side 40 and the other end side 50 are held together by the insulating holding member 85 at a plurality of locations. It may be 1A. As the insulating holding member 85 in this case, for example, the one having the configuration shown in FIG. 6 may be used. The insulating holding member 85 of FIG. 6 includes a substrate 86 and a locking piece 87 including a locking hook 89 that is folded back from the both ends of the substrate 86 to the center and locked in the locking hole 88 of the substrate 86. In addition, the holding portions 90 and 91 formed between the locking piece 87 and the substrate 86 have a configuration in which the conductor rod 2 one end side 40 and the other end side 50 are separately stored and insulated. If this insulating holding member 85 is used, the electrode 1A can be easily created even when the intersection 7 is not formed, and the shape maintaining effect of the conductor rod 2 can be enhanced.

Embodiment 5
If each end face of the pair of opposing cut surfaces 9 and 9 obtained by cutting a part of one end side 40 or the other end side 50 of the conductor rod 2 is formed in a sharp shape, an electric field is increased at the sharp end face portion. Discharge tends to occur. Accordingly, the discharge efficiency can be improved.

  In FIG. 5, one end 4 of the conductor bar 2 is folded back in the direction of the other end 5 of the conductor bar 2 with respect to the intermediate point 3 as one conductor bar 2, and the one end 4 and the other end 5 of the conductor bar 2, that is, the conductor Only one end side 40 or the other end side 50 of the conductor rod 2 that is opposed to each other in a straight line is configured such that only both ends of the rod 2 are electrically insulated and held by the electrode side connector 11 as an insulation holding member and mechanically held. It is good also as an electrode which formed only one discharge gap 10 by cut | disconnecting only one part. According to this configuration, the electrode-side connector 11 as the insulating holding member can enhance the shape maintaining effect of the conductor rod 2, the electrode structure is simplified and the manufacture is facilitated, and the cut surfaces are made to face each other. Since the discharge gap 10 can be formed, an electrode that can achieve the intended purpose of the present application can be obtained. Moreover, since the shape of the conductor rod 2 is held by the electrode-side connector 11, an electrode capable of maintaining the accuracy of the discharge gap 10 can be obtained.

The figure which shows the electric discharge crushing apparatus and electrode by Embodiment 1 of this invention. The figure which shows the structure of the conductor bar which comprises the electrode by Embodiment 1. FIG. The figure which shows the cross section of the insulation holding member corresponded to the AA cross section of FIG. The figure which shows the electrode provided with the electrical discharge crushing apparatus and cartridge by Embodiment 3. FIG. The figure which shows the electric discharge crushing apparatus by Embodiment 4, and an electrode. The figure which shows the cross section of the insulation holding member corresponded to the AA cross section of FIG. The figure which shows the conventional electric discharge crushing apparatus and an electrode. It is a figure which shows the electrode of the conventional electric discharge crushing apparatus, (a) is an enlarged view of the front-end | tip part of an electrode, (b) is a BB end surface figure of (a).

Explanation of symbols

1 electrode, 2 conductor rod, 4 one end of the conductor rod, 5 other end of the conductor rod, 6 bent part,
7 intersection, 8 insulating holding member, 9 cut surface, 10 discharge gap,
11 electrode side connector (insulation holding member), 30 cartridge,
40 One end side of the conductor bar, 50 The other end side of the conductor bar, 60 Destruction object.

Claims (7)

  In an electrode of a discharge crushing apparatus that generates a pressure wave by applying discharge energy to an electrolytic solution provided inside an object to be destroyed through an electrode to generate a pressure wave and crushing the object to be destroyed with the pressure wave One end of the conductor rod is bent in the direction of the other end of the conductor rod, both ends of the conductor rod are held in an insulated state by the insulating holding member, and the conductor rod is cut so that the cut surface and the cut surface face each other An electrode for a discharge crushing device, wherein a discharge gap is formed to cause discharge.   In an electrode of a discharge crushing apparatus that generates a pressure wave by applying discharge energy to an electrolytic solution provided inside an object to be destroyed through an electrode to generate a pressure wave and crushing the object to be destroyed with the pressure wave Insulating holding members at a plurality of locations where one end of the conductor rod is bent in the direction of the other end of the conductor rod and one end side and the other end side of the conductor rod are spaced apart along the extending direction of the conductor rod An electrode of a discharge crushing apparatus, characterized in that a discharge gap is formed in which the conductor rod is cut and the cut surface and the cut surface are opposed to each other to form a discharge gap.   The one end side and the other end side of the conductor rod are held in an insulated state by the insulating holding member at positions close to each other at a plurality of positions spaced apart along the extending direction of the conductor rod. Item 3. An electrode for an electric discharge crushing device according to Item 2.   3. A discharge gap of 1 or less is formed between the insulating holding member and the insulating holding member by cutting one or less portions of the conductor rod between the insulating holding member and the insulating holding member. The electrode of the electric discharge crushing apparatus of Claim 3.   The electrode of the discharge crushing apparatus according to any one of claims 2 to 4, wherein the insulating holding member is detachably formed at one end side and the other end side of the conductor rod.   The electrode of the discharge crushing apparatus according to any one of claims 1 to 5, wherein the end faces of the cut surfaces facing each other are formed in a sharp shape.   The electrode of the discharge crushing device according to any one of claims 1 to 6, further comprising a cartridge that accommodates the discharge gap and is filled with an electrolytic solution.

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