WO2002083312A1 - Electrode pour appareil de broyage et appareil de broyage - Google Patents
Electrode pour appareil de broyage et appareil de broyage Download PDFInfo
- Publication number
- WO2002083312A1 WO2002083312A1 PCT/JP2002/003387 JP0203387W WO02083312A1 WO 2002083312 A1 WO2002083312 A1 WO 2002083312A1 JP 0203387 W JP0203387 W JP 0203387W WO 02083312 A1 WO02083312 A1 WO 02083312A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- conductor
- crushing device
- discharge
- central axis
- Prior art date
Links
- 239000004020 conductor Substances 0.000 claims abstract description 125
- 230000002093 peripheral effect Effects 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 abstract 2
- 230000004048 modification Effects 0.000 description 13
- 238000012986 modification Methods 0.000 description 13
- 239000011435 rock Substances 0.000 description 11
- 239000003990 capacitor Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 239000012212 insulator Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/18—Other methods or devices for dislodging with or without loading by electricity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
- B02C2019/183—Crushing by discharge of high electrical energy
Definitions
- the present invention relates to a crushing device for breaking rock and the like and an electrode for the crushing device, and more particularly to a crushing device and a crushing device electrode capable of efficiently breaking a rock and the like.
- FIG. 19 is a schematic diagram showing a conventional crusher.
- FIG. 20 is a schematic diagram showing a basic configuration of the crushing device shown in FIG. 19, and
- FIG. 21 is a partially enlarged schematic diagram showing a tip portion of the electrode shown in FIG. It is.
- FIGS. 19 to 21 the structure and operation of a framing device for carrying out the crushing method disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 4-222704 will be described. First, the structure of a conventional crusher will be briefly described with reference to FIGS.
- the pulse power source 106 may be composed of a circuit including a capacitor 108 and a switch 107.
- a power source 109 is connected to the pulse power source 106.
- the circuit of the NORSPA source 106, the housing including this circuit, and the vehicle body on which the crushing device is mounted are grounded.
- the coaxial electrode 101 serving as a breaking electrode for breaking rocks and the like is connected to a pulse power source 106 and a coaxial Cape Knore 105.
- a center electrode 112 and an outer electrode 115 positioned on the outer side of the center electrode 112 via an insulator 113 are arranged.
- One of the center electrode 1 1 2 and the outer electrode 1 1 5 is grounded, and the other is charged with the electric charge stored in the capacitor 1 08 when the switch 1 07 of the pulse power source 106 is closed.
- Preliminary holes 110 are formed in advance in a rock to be destroyed using a drill or the like. Electricity such as water 1 1 1 Inject the solution. The coaxial electrode 101 is inserted into the prepared hole 110.
- the conventional crusher described above has the following problems. That is, the electrolyte is in a plasma state in a region where an arc is formed by the discharge between the center electrode 112 and the outer electrode 115, and the temperature in this region is the current supplied to the coaxial electrode 101. It changes greatly depending on the value. In other words, the higher the current value, the higher the temperature of the region where the arc is formed. On the other hand, it is known that the discharge resistance decreases as the temperature of the region where the arc is formed increases.
- the energy consumed by the discharge of the coaxial electrode 101 is proportional to the square of the current value supplied to the coaxial electrode 101 X discharge resistance.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electrode for a crushing device and a crushing device capable of increasing the energy used for crushing. To provide. Disclosure of the invention
- An electrode for a crushing device surrounds a central conductor extending along a central axis and having an outer peripheral surface, an insulating member disposed on the outer peripheral surface of the central conductor, and an insulating member.
- Peripheral conductors arranged as described above.
- the outer conductor includes a first conductor, and a second conductor spaced from the first conductor in a direction in which the central axis extends.
- the crusher electrode is supplied to the center conductor.
- a first discharge is generated between a portion located at the end and one of the first and second conductors arranged at the end.
- a second discharge also occurs between the first conductor and the second conductor. That is, in the conventional electrode, discharge occurs only at one end, whereas in the electrode according to the present invention, discharge occurs in at least two places.
- the capacity of the crusher (crushing capacity) can be increased.
- the discharge resistance is smaller than the resistance of the entire circuit, and the increase in the discharge resistance at several points is smaller than the resistance of the entire circuit, so the crushing force can be increased without changing the size of the power supply .
- the central conductor includes an end that generates a discharge
- the first conductor is disposed on an end side in a direction in which the central axis extends, and both ends in a direction in which the central axis extends. It is preferable to include a portion and an area sandwiched between both ends. It is preferable that both ends of the first conductor have relatively small diameter portions, and a region sandwiched between both ends of the first conductor has relatively large diameter portions. Is preferred. In this case, a first discharge occurs between the center conductor located at the end and the first conductor, and a second discharge occurs between the first conductor and the second conductor. Discharge will occur.
- the first and second discharges are generated so as to sandwich the first conductor. Then, by relatively increasing the diameter of the region sandwiched between both ends of the first conductor, the region where the first discharge occurs and the region where the second discharge occurs can be defined as this relative region. Can be isolated by a large diameter portion. As a result, it is possible to prevent the first discharge and the second discharge from interfering with each other. For this reason, since the arcs of the first and second discharges are integrated, it is possible to prevent the number of discharge portions from being reduced, thereby preventing a reduction in discharge resistance. Therefore, the capacity of the crusher can be surely improved.
- a projection is formed on at least one of the first and second conductors.
- the protrusion includes a first protrusion formed on one of the first and second conductors, and at least one of the first and second conductors. Either one of them may include a second protrusion formed at a position different from the position of the first protrusion in the circumferential direction of the central axis.
- the arc in the first discharge and the arc in the second discharge are connected. (Integration) may occur.
- the arcs of the first and second discharges are integrated in this way, the result is similar to a state in which only one discharge is generated in the electrode for crushing equipment, and the energy used for crushing is reduced. I will.
- the first projection and the second projection are formed at different positions in the circumferential direction of the central axis.
- One discharge generated in the formed portion and another discharge generated in the portion in which the second protrusion is formed can be generated at different positions in the circumferential direction of the central axis. Therefore, for example, in the first or second conductor located on the end side of the crushing device electrode, a first protrusion is formed in a region facing the end side of the crushing device electrode, and the second conductive material is formed.
- the first discharge generated on the end side of the crushing device electrode corresponds to the one discharge, and the first conductive
- the second discharge generated between the body and the second conductor corresponds to the other discharge.
- the first discharge and the second discharge can be generated at different positions in the circumferential direction of the central axis.
- the inventor conducted experiments and studies on discharge phenomena in the electrode for the crusher, and obtained the following knowledge. That is, in the electrode for the crushing device according to the present invention, a plurality of discharges are generated in one electrode for the crushing device, thereby increasing the energy used for the fracture frame. It is necessary. Therefore, the inventor has observed in detail the discharge phenomenon in the electrode for the crushing device, and studied conditions for independently and stably generating a plurality of discharges. According to the experiments of the inventor, when a discharge is generated between the first and second conductors in the crushing device electrode, for example, the arc generated by the discharge immediately after the start of the discharge is relatively small. The size of the arc grows to some extent in the direction of the central axis with time.
- the end of the arc having such a stable size is defined as having a length of about 1 O mm from the ends of the first and second conductors in the direction along the central axis. It had reached the position where it invaded the body.
- the length of the arc extending from the ends of the first and second conductors onto the first and second conductors is the length of the first and second conductors. If the length in the direction of the central axis was sufficiently large, even if the voltage of the power source used for crushing and the shape and material of the electrodes for the crushing device were changed, there was almost no change.
- the arc extension length is at most the length of the first and second conductors. Cannot grow enough. In such a state, the energy consumed by the discharge (the energy used for crushing) was smaller than when the power arc had grown sufficiently.
- the length of the first and second conductors in the central axis direction is smaller than 10 mm, the arc caused by the first discharge and the arc caused by the second discharge in the circumferential direction of the central axis. These two arcs are easily connected if they are formed close to each other. As a result, the energy used for crushing was also reduced.
- At least one of the first and second conductors has a length of 10 mm in a direction in which the central axis extends. It is preferable that it is above.
- the arc of the discharge can be sufficiently large in the direction along the central axis, so that the energy used for crushing can be sufficiently large.
- At least one of the first and second conductors has a length of 20 mm or more in a direction in which the central axis extends. ''
- the length of the first conductor in the direction in which the central axis extends is 2 O mm or more, two arcs generated at both ends of the first conductor will be generated in the circumferential direction of the central axis. Even if they are formed at close positions, these two arcs can be grown sufficiently independently. That is, unification of the arcs of the first and second discharges can be surely prevented, and the energy used for crushing can be increased by sufficiently growing the arc.
- the outer conductor may include one or more other conductors spaced apart from the second conductor in a direction in which a central axis extends. .
- a third discharge can be generated between the second conductor and another conductor.
- the other conductor includes a plurality of conductors formed at intervals. Then, the fourth and fifth discharges can be further generated. As a result, the discharge resistance can be further increased, and the energy used for crushing can be further increased.
- the protrusion may be formed on at least one selected from the group consisting of a first conductor, a second conductor, and another conductor. .
- the protrusion may protrude in a direction substantially parallel to the direction in which the central axis extends.
- the distance in the direction in which the central axis extends between the first and second conductors, or the distance in the direction in which the central axis extends between the central conductor and one of the first and second conductors Can be locally reduced. Therefore, a discharge can be preferentially generated in the portion where the protrusion is formed. Therefore, by changing the position of the protrusion, the position of the region where the discharge occurs can be arbitrarily changed.
- the protruding portion may protrude in the radial direction of the central axis.
- the shape of the first or second conductor in the radial direction of the central axis can be made non-uniform due to the formation of the protruding portion.
- the area can be changed arbitrarily.
- the protrusion includes a first protrusion formed into one selected from the group consisting of a first conductor, a second conductor, and another conductor. At least one selected from the group consisting of the first conductor, the second conductor, and another conductor is formed at a position different from the position of the first protrusion in the circumferential direction of the central axis. And a second protrusion formed.
- the first projection and the second projection are different from each other in the circumferential direction of the central axis. Since one discharge is generated in the portion where the first protrusion is formed and the other discharge is generated in the portion where the second protrusion is formed, the discharge is generated in the circumferential direction of the central axis. Can be generated at different locations. Therefore, it is possible to prevent an arc in one discharge from being connected (unified) with an arc in another discharge. As a result, ! It is possible to prevent the energy used for crushing from being reduced due to the connection between the arc in one discharge and the arc in another discharge.
- At least one length selected from the group consisting of a first conductor, a second conductor, and another conductor is 1 in a direction in which the central axis extends. It is preferably 0 mm or more.
- the arc of the discharge may be sufficiently large in the direction along the central axis. it can. Therefore, the energy used for crushing can be sufficiently increased.
- At least one length selected from the group consisting of the first conductor, the second conductor, and another conductor in the direction in which the central axis extends Is more preferably 2 O mm or more.
- the length of the second conductor in the direction in which the central axis extends is 2 O mm or more, two arcs generated at both ends of the second conductor are close in the circumferential direction of the central axis. Even if it is formed at the position, these two arcs can be grown sufficiently independently in the second conductor, and the resistance is not reduced by integration. That is, the two arcs generated at both ends of the second conductor or the like can be reliably prevented from being integrated, and the energy used for crushing can be increased by sufficiently growing the arc.
- the center conductor may include a stranded conductor
- the insulating member may include a flexible material
- impacts may be applied to the electrodes from the lateral direction.
- the electrode for the crushing device has a certain degree of flexibility with the above configuration, the impact from the lateral direction can be absorbed by the deformation of the electrode, and the electrode may be broken due to the impact. Occurrence can be prevented. Therefore, The life of the electrode can be extended. '
- a crushing device includes the electrode for the crushing device according to the above aspect.
- FIG. 1 is a schematic diagram for explaining a device configuration of a crushing device electrode according to a first embodiment of the present invention and a crushing device using the crushing device electrode according to the present invention.
- FIG. 2 is a partially enlarged schematic view showing a tip portion of the crushing device electrode shown in FIG.
- FIG. 3 is a schematic perspective enlarged view showing a tip portion of the electrode for the crushing device shown in FIG.
- FIG. 4 is a schematic sectional view of the electrode for the crusher shown in FIG.
- FIG. 5 is a partially enlarged schematic view showing a first modification of the crushing device electrode shown in FIGS.
- FIG. 6 is a schematic cross-sectional view showing a second modification of the electrode for the crusher shown in FIGS.
- FIG. 7 is a partially enlarged schematic view showing Embodiment 2 of the electrode for a crusher according to the present invention.
- FIG. 8 is a partially enlarged schematic view showing Embodiment 3 of the electrode for a crusher according to the present invention.
- FIG. 9 is a partially enlarged schematic diagram showing Embodiment 4 of an electrode for a crusher according to the present invention.
- FIG. 10 is a schematic sectional view of the electrode for the crushing device shown in FIG.
- FIG. 11 is a schematic cross-sectional view showing a first modification of the crushing device electrode shown in FIGS. 9 and 10.
- FIG. 12 is a schematic cross-sectional view showing a second modification of the electrode for the crushing device shown in FIGS.
- FIG. 13 is a partially enlarged schematic view showing a third modification of the electrode for the crusher shown in FIGS. 9 and 10.
- FIG. 14 is a schematic perspective view showing Embodiment 5 of the electrode for a crusher according to the present invention. You.
- FIG. 15 is a schematic cross-sectional view of the electrode for the crusher shown in FIG.
- FIG. 16 is a schematic diagram showing a modification of Embodiment 5 of the electrode for the crusher shown in FIGS. 14 and 15.
- FIG. 17 is a schematic diagram showing the electrode for the crusher used in the experiment.
- FIG. 18 is a schematic diagram showing a state where a discharge has occurred in the experiment.
- FIG. 19 is a schematic diagram showing a conventional crusher.
- FIG. 20 is a schematic diagram showing a basic configuration of the crusher shown in FIG.
- FIG. 21 is a partially enlarged schematic view showing the tip of the electrode shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- Embodiment 1 of an electrode for a crusher and a crusher according to the present invention will be described with reference to FIGS.
- the crushing device includes a coaxial electrode 1, a pulse power source 6, a power source 9, and a coaxial cable 5.
- the pulse power source 6 is composed of a circuit including a capacitor 8, a switch 7, and the like.
- the power source 9 is connected to the pulse power source 6.
- the circuit of the pulse power source 6 is grounded.
- the coaxial electrode 1, which is an electrode for the crusher, is connected to a pulse power source 6 by a coaxial cable 5.
- the coaxial electrode 1 includes a center electrode 12 extending as a central conductor extending along the central axis, an insulator 13 disposed as an insulating member on the outer peripheral surface of the center electrode 12, 13 and an outer peripheral electrode 15 as an outer peripheral conductor arranged on the outer peripheral surface.
- the coaxial electrode 1 is inserted into a pilot hole 10 formed in a crushed object 2 such as a rock. Inside the lower hole 10, water 11 as an electrolyte is disposed. At the tip 16 of the coaxial electrode 1, the end of the center electrode 12 protrudes.
- the outer peripheral electrode 15 is composed of an outer peripheral electrode portion 14 a as a first conductor located on the tip end 16 side, and the outer peripheral electrode portion 14 a An outer peripheral electrode portion 14b as a second conductor arranged at intervals in the direction in which the central axis extends.
- a coaxial electrode 1 which is an electrode for a crusher has basically the same structure as the coaxial electrode shown in FIGS.
- the outer electrode 15 includes three outer electrode portions 14a to 14c.
- the outer electrode portions 14a to 14c are arranged at intervals.
- Discharge can be generated at three places, that is, between the outer electrode portion 14b and the outer electrode portion 14c.
- the discharge resistance can be further increased, and the energy released by the discharge can be further increased.
- the capacity of the crusher can be further improved.
- the number of peripheral electrode portions may be further increased to increase the number of locations where discharge occurs. In this case, the capacity of the crusher is further improved.
- a coaxial electrode 1 which is an electrode for a crusher, has basically the same structure as the coaxial electrode shown in FIGS.
- a flexible stranded conductor 17 is used as the center electrode.
- a flexible insulator 18 such as a rubber-based insulator or urethane is used as the insulator.
- a shock may be applied to the coaxial electrode 1 from the lateral direction.
- the coaxial electrode 1 having a certain degree of flexibility as described above is used, a lateral impact can be absorbed by the deformation of the coaxial electrode 1. Therefore, it is possible to prevent an accident such as breakage of the coaxial electrode 1 due to the impact. Therefore, the life of the coaxial electrode 1 can be extended.
- the coaxial electrode 1 as the electrode for the crushing device basically has the same structure as the coaxial electrode shown in FIGS. 1 to 4, but is provided at the center of the outer electrode portion 14a.
- a radial projection 19 is formed that protrudes in the outer peripheral direction and extends in the circumferential direction.
- the first discharge occurs between the portion of the center electrode 12 located at the end of the coaxial electrode 1 and the outer electrode portion 14a as the first conductor.
- a second discharge is generated between the outer peripheral electrode portion 14a and the outer peripheral electrode portion 14b as the second conductor.
- a coaxial electrode 1 as an electrode for a crushing device basically has the same structure as the coaxial electrode shown in FIGS. 1 to 4, but has a central electrode 1
- a projection 21 is formed as a projection projecting in a direction substantially parallel to the direction in which the central axis of the second 2 extends.
- the outer electrode portion 14 a and the outer electrode portion 14 b Since the distance between them can be locally reduced, charges can be concentrated on the convex portions 21. Therefore, discharge can be preferentially generated in the portion where the convex portion 21 is formed. Therefore, by changing the position of the protrusion 21, the position of the region where the discharge occurs can be arbitrarily changed.
- the protrusion 21 may be formed on the outer electrode portion 14a, or may be formed on both the outer electrode portions 14a and 14b. Further, the convex portions 21 may be formed at a plurality of positions in the circumferential direction. The shape of the convex portion 21 is not limited to the triangular shape as shown in the drawing as long as the distance between the outer peripheral electrode portions 14a and 14b can be locally reduced. You may.
- a convex portion may be formed on the end side of the coaxial electrode 1 (the side where the center electrode 12 is exposed).
- the position where the discharge occurs can be changed between the center electrode 12 and the outer electrode portion 14a. Further, the same effect can be obtained even if the protrusion is formed at the end of the center electrode 12.
- FIGS. 9 and 10 a third embodiment of the electrode for a crusher according to the present invention will be described.
- the coaxial electrode 1 as the electrode for the crusher basically has the same structure as the coaxial electrode shown in FIGS. 4b, the projections 2 2a, 2 projecting in the radial direction of the central axis of the center electrode 1 2 2 2b is installed respectively.
- Screw holes 25a and 25b are formed in the protrusions 22a and 22b made of a conductor, respectively, as shown in FIG.
- screw holes 24a and 24b are formed at portions where the projections 22a and 22b are installed, respectively.
- the protrusion 23a is fixed to the outer electrode part 14a by inserting and fixing the screw 23a inserted in the screw hole 25a to the screw hole 24a of the outer electrode part 14a. ing.
- the protrusion 22b becomes the outer electrode portion 1b. Fixed to 4b.
- the shape of the outer peripheral electrode portions 14a and 14b in the radial direction of the central axis can be made non-circular by forming the projections 22a and 22b.
- the positions of 22a and 22b By changing the positions of 22a and 22b, the position of the region where the discharge occurs (the region where the arc is formed) can be arbitrarily changed.
- FIG. 11 corresponds to FIG.
- the coaxial electrode 1 as the electrode for the crushing device basically has the same structure as the coaxial electrode 1 shown in FIGS.
- the protrusions 22a and 26b of the outer electrode portions 14a and 14b provided on the outer electrode portions 14a and 14b correspond to the outer electrode portions 14a and 26b, respectively. So that it protrudes from the side walls 27a and 27b of the 14b (that is, the protruding part 2 2 is larger than the distance between the side walls 27a and 27b of the outer electrode portions 14a and 14b). a, 22b so that the distance between the side walls 26a, 26b is smaller).
- FIG. 12 corresponds to FIG.
- the coaxial electrode 1 as the electrode for the crushing device basically has the same structure as the coaxial electrode shown in FIGS. 9 and 10.]
- the projections 28a and 28b are formed integrally with the outer peripheral electrode portions 14a and 14b, respectively. in this case, The same effect as the coaxial electrode shown in FIGS. 9 and 10 can be obtained.
- FIG. 13 corresponds to FIG.
- coaxial electrode 1 as an electrode for a crusher has basically the same structure as coaxial electrode 1 shown in FIGS. 9 and 10. However, in the coaxial electrode 1 shown in FIG. 13, both ends of the outer peripheral electrode portion 14 a and the outer peripheral electrode portion 14 Protrusions 21a to 21c are formed at one end of b.
- the projections 21a to 21c are made of the same material as that of the outer electrode portions 14a and 14b, respectively.
- the protrusions 2 lb and 21 c are formed at positions different from the positions of the protrusions 21 a in the circumferential direction of the central axis of the center electrode 12.
- a discharge (first discharge) between the center electrode 12 and the outer peripheral electrode portion 14a is performed between the center electrode 12 and the protrusion 21a. Occurs in the region of
- a discharge (second discharge) between the outer peripheral electrode portion 14a and the outer peripheral electrode portion 14b occurs in a region between the convex portions 21b and 21c. Therefore, the first discharge and the second discharge occur in different regions in the circumferential direction of the central axis.
- the coaxial electrode 1 as the electrode for the crusher basically has the same structure as the coaxial electrode shown in FIGS.
- the outer peripheral electrode 15 includes four outer peripheral electrode portions 14a to 14d.
- the outer peripheral electrode portions 14a to 14d are arranged at intervals.
- the widths of the outer electrodes 14a to 14c in the central axis direction are defined as widths L1 to L3, respectively.
- the distance between the outer electrodes 14a, 14b is distance W1
- the distance between the outer electrodes 14b, 14c is distance.
- the distance W 2 and the distance between the outer electrodes 14 c and 14 d are distance W 3. In this case, the same effect as the coaxial electrode shown in FIGS.
- coaxial electrode 1 as an electrode for a crushing device basically has the same structure as coaxial electrode 1 shown in FIGS. 14 and 15.
- protrusions 21 a to 21 d are formed on each of the outer electrode portions 14 a to 14 c.
- the projections 21a to 21d are formed so as to project in a direction substantially parallel to the direction in which the central axis of the center electrode 12 extends.
- the protrusions 2 1 & to 2 1 (1 are formed at different positions in the circumferential direction of the central axis of the central electrode 12.
- the discharge (first discharge) that occurs in the area occurs between the projection 21a and the center electrode 12.
- the area between the outer electrode 14a and the outer electrode 14b Discharge (second discharge) is generated in a region between the convex portion 2 ⁇ b and the outer peripheral electrode 14b, and is generated between the outer peripheral electrode portion 14b and the outer peripheral electrode portion 14c.
- Discharge (third discharge) occurs in the region between the convex portion 21c and the outer peripheral electrode 14c, and occurs between the outer peripheral electrode portion 14c and the outer peripheral electrode portion 14d.
- the discharge (fourth discharge) occurs in a region between the protrusion 21 d and the outer peripheral electrode 14 d.
- the charges can be concentrated on the protrusions 21 a to 21 d.
- the first to fourth discharges can be generated in the vicinity of the portion where 21 d is formed. Therefore, by changing the positions of the protrusions 21a to 21d, the positions where the first to fourth discharges occur can be arbitrarily changed.
- the first to fourth discharges generated at the electrodes are formed at different positions in the circumferential direction of the center axis of the center electrode 12. Therefore, it is possible to reliably prevent the arcs of adjacent discharges from being connected to each other.
- the protrusions 21 a to 21 d are formed so as to protrude in a direction substantially parallel to the direction in which the center axis of the center electrode 12 extends.
- the projections 21a to 21d may be formed so as to project in the radial direction of the central axis. In this case, the same effect as the coaxial electrode shown in FIG. 16 can be obtained.
- the width (length in the direction in which the central axis of central electrode 12 extends) of outer peripheral electrodes 14 a to 14 d in Embodiments 1 to 5 of the present invention is preferably 1 Omni or more. No. In this way, the arc formed by the discharge can grow to a sufficient size without being limited by the width of the outer electrodes 14a to 14d. Therefore, the energy used for crushing can be increased.
- To 5 may be 20 mm or more. In this way, even if two adjacent discharges occur near the center axis of the center electrode 12 in the circumferential direction, the arcs due to the two discharges are reliably prevented from being connected. it can.
- the inventor conducted a discharge experiment using the electrode for a crusher according to the present invention to confirm the effect of the present invention. This experiment will be described with reference to FIGS. 17 and 18.
- coaxial electrode 1 as a crushing device electrode prepared by the inventor has basically the same structure as the crushing device electrode according to the fifth embodiment of the present invention. That is, the coaxial electrode 1 includes a center electrode 12, an insulator 13 disposed on the outer peripheral surface of the center electrode 12, and an outer peripheral electrode disposed on the outer peripheral surface of the insulator 13. Parts 14a to 14d.
- the center electrode 12 extends along the center axis and is made of copper. The diameter of the center electrode 12 is 2 O mm.
- the insulator 13 is made of FRP (Fiber Reinforced P 1 astics) and its thickness is 10 mm.
- the outer electrode portions 14a to 14d constituting the outer electrode 15 are made of copper, and have a thickness of 5 mm.
- the outer diameter of the coaxial electrode 1 is 5 O mm.
- the width L of the outer electrode 14 to 14 c is 27 mm, and the distance W between the outer electrodes 14 a to 14 d is 1 O mm.
- the capacitor is connected to the coaxial electrode 1 using a cable with a circuit impedance of 3 ⁇ .
- a discharge was generated.
- an arc 20a having a relatively small size is generated in the area of the outer electrodes 14a to 14d.
- the size of the arc increases with the passage of time, and an arc 20b having a relatively large size is finally formed.
- the end of the arc 20 b in the direction along the central axis of the center electrode 12 extends from the end of the outer electrode portion 14 a to l 4 d. It was observed that only LA extended inward. The value of the length LA was about 10 mm.
- the width L of the outer electrodes 14a to 14d is 1 Omm or more, a large arc 20b that has grown sufficiently during the discharge can be formed (while the outer electrodes 14a to 14d are formed). If the width L of ⁇ 14 d is less than 1 O mm, the arc cannot grow sufficiently, and as a result, the energy used for crushing is considered to be small. In some cases, adjacent arcs may be connected to each other (for example, an arc generated between the outer electrodes 14a and 14b and an arc generated between the outer electrodes 14b and 14c). In this case, too, the amount of energy used for crushing is also likely to be smaller). In the coaxial electrode 1, as shown in FIG.
- the width L of the outer electrodes 14a to 14d is set to 2 By setting the length to 0 mm or more, even if the adjacent arcs 20 b are formed close to the center axis of the center electrode 12 in the circumferential direction, the arcs 20 b are reliably prevented from being connected to each other. it can.
- the electrode for a crushing device according to the present invention can be applied to crushing of rocks and bedrocks, and further to crushing of artificial structures made of concrete.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Food Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- General Engineering & Computer Science (AREA)
- Disintegrating Or Milling (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02714461A EP1375004A4 (en) | 2001-04-06 | 2002-04-04 | ELECTRODE FOR MILLING APPARATUS AND MILLING APPARATUS |
US10/333,076 US6935702B2 (en) | 2001-04-06 | 2002-04-04 | Crushing apparatus electrode and crushing apparatus |
CA002416034A CA2416034A1 (en) | 2001-04-06 | 2002-04-04 | Crushing apparatus electrode and crushing apparatus |
KR10-2002-7016565A KR100512812B1 (ko) | 2001-04-06 | 2002-04-04 | 파쇄장치용 전극 및 파쇄장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-108388 | 2001-04-06 | ||
JP2001108388A JP3563363B2 (ja) | 2000-12-08 | 2001-04-06 | 破砕装置用電極および破砕装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002083312A1 true WO2002083312A1 (fr) | 2002-10-24 |
Family
ID=18960536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/003387 WO2002083312A1 (fr) | 2001-04-06 | 2002-04-04 | Electrode pour appareil de broyage et appareil de broyage |
Country Status (6)
Country | Link |
---|---|
US (1) | US6935702B2 (ja) |
EP (1) | EP1375004A4 (ja) |
KR (1) | KR100512812B1 (ja) |
CN (1) | CN1461239A (ja) |
CA (1) | CA2416034A1 (ja) |
WO (1) | WO2002083312A1 (ja) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
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US7384009B2 (en) | 2004-08-20 | 2008-06-10 | Tetra Corporation | Virtual electrode mineral particle disintegrator |
US8789772B2 (en) | 2004-08-20 | 2014-07-29 | Sdg, Llc | Virtual electrode mineral particle disintegrator |
US9190190B1 (en) | 2004-08-20 | 2015-11-17 | Sdg, Llc | Method of providing a high permittivity fluid |
US8172006B2 (en) | 2004-08-20 | 2012-05-08 | Sdg, Llc | Pulsed electric rock drilling apparatus with non-rotating bit |
US10060195B2 (en) | 2006-06-29 | 2018-08-28 | Sdg Llc | Repetitive pulsed electric discharge apparatuses and methods of use |
SK50872007A3 (sk) | 2007-06-29 | 2009-01-07 | Ivan Kočiš | Zariadenie na exkaváciu hlbinných otvorov v geologickej formácii a spôsob prepravy energií a materiálu v týchto otvoroch |
SK288264B6 (sk) | 2009-02-05 | 2015-05-05 | Ga Drilling, A. S. | Zariadenie na vykonávanie hĺbkových vrtov a spôsob vykonávania hĺbkových vrtov |
FR2942149B1 (fr) | 2009-02-13 | 2012-07-06 | Camille Cie D Assistance Miniere Et Ind | Procede et systeme de valorisation de materiaux et/ou produits par puissance pulsee |
US20100237850A1 (en) * | 2009-03-19 | 2010-09-23 | Ahmed Abdullah Salem Al-Ghamdi | Device and method for testing food quality |
FR2949356B1 (fr) | 2009-08-26 | 2011-11-11 | Camille Cie D Assistance Miniere Et Ind | Procede et systeme de valorisation de materiaux et / ou produits par puissance pulsee |
SK50622009A3 (sk) | 2009-09-24 | 2011-05-06 | Ivan Kočiš | Spôsob rozrušovania materiálov a zariadenie na vykonávanie tohto spôsobu |
US8628146B2 (en) * | 2010-03-17 | 2014-01-14 | Auburn University | Method of and apparatus for plasma blasting |
WO2012094676A2 (en) | 2011-01-07 | 2012-07-12 | Sdg, Llc | Apparatus and method for supplying electrical power to an electrocrushing drill |
US10407995B2 (en) | 2012-07-05 | 2019-09-10 | Sdg Llc | Repetitive pulsed electric discharge drills including downhole formation evaluation |
WO2015042608A1 (en) | 2013-09-23 | 2015-03-26 | Sdg Llc | Method and apparatus for isolating and switching lower voltage pulses from high voltage pulses in electrocrushing and electrohydraulic drills |
CN103753701B (zh) * | 2013-12-30 | 2015-12-09 | 华中科技大学 | 一种脉冲放电回收混凝土系统 |
US10577767B2 (en) * | 2018-02-20 | 2020-03-03 | Petram Technologies, Inc. | In-situ piling and anchor shaping using plasma blasting |
US10866076B2 (en) * | 2018-02-20 | 2020-12-15 | Petram Technologies, Inc. | Apparatus for plasma blasting |
US11268796B2 (en) * | 2018-02-20 | 2022-03-08 | Petram Technologies, Inc | Apparatus for plasma blasting |
US10844702B2 (en) * | 2018-03-20 | 2020-11-24 | Petram Technologies, Inc. | Precision utility mapping and excavating using plasma blasting |
CN108871130B (zh) * | 2018-06-29 | 2024-05-17 | 中国地质大学(北京) | 一种可实现孔壁密封的等离子体爆破岩石机械装置 |
CN110215985B (zh) * | 2019-07-05 | 2021-06-01 | 东北大学 | 一种用于矿石粉碎预处理的高压电脉冲装置 |
CN111910952A (zh) * | 2020-06-11 | 2020-11-10 | 哈尔滨理工大学 | 一种采用高压脉冲技术的环保型混凝土结构破碎装置及破碎方法 |
US11536124B2 (en) * | 2020-09-03 | 2022-12-27 | Petram Technologies, Inc. | Sliced and elliptical head probe for plasma blast applications |
CN112483086B (zh) * | 2020-10-30 | 2022-02-08 | 北京科技大学 | 一种瞬间电脉冲致使金属矿层碎裂的系统及使用方法 |
CN114869399A (zh) * | 2021-02-05 | 2022-08-09 | 沛嘉医疗科技(苏州)有限公司 | 电极组件和使用该电极组件的冲击波装置 |
US11203400B1 (en) | 2021-06-17 | 2021-12-21 | General Technologies Corp. | Support system having shaped pile-anchor foundations and a method of forming same |
CN115337076A (zh) * | 2022-07-15 | 2022-11-15 | 深圳英美达医疗技术有限公司 | 一种冲击波球囊导管 |
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JPS63221857A (ja) * | 1987-03-10 | 1988-09-14 | 桜井 誠也 | 破砕装置 |
EP0777102A2 (en) * | 1995-10-30 | 1997-06-04 | Soosan Special Purpose Vehicle, Co., Ltd. | Rock fragmentation system using Gold-Schmidt method |
EP1033551A2 (en) * | 1999-03-02 | 2000-09-06 | Korea Accelerator and Plasma Research Association (KAPRA) | Electro-power impact cell for plasma blasting |
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US3713166A (en) * | 1970-12-18 | 1973-01-23 | Ball Brothers Res Corp | Flush mounted antenna and receiver tank circuit assembly |
US4115783A (en) * | 1977-06-14 | 1978-09-19 | The United States Of America As Represented By The Secretary Of The Army | Broadband hybrid monopole antenna |
US4653697A (en) * | 1985-05-03 | 1987-03-31 | Ceee Corporation | Method and apparatus for fragmenting a substance by the discharge of pulsed electrical energy |
ZA91612B (en) | 1990-04-20 | 1991-10-30 | Noranda Inc | Plasma blasting method |
US5425570A (en) * | 1994-01-21 | 1995-06-20 | Maxwell Laboratories, Inc. | Method and apparatus for plasma blasting |
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2002
- 2002-04-04 KR KR10-2002-7016565A patent/KR100512812B1/ko not_active IP Right Cessation
- 2002-04-04 WO PCT/JP2002/003387 patent/WO2002083312A1/ja active IP Right Grant
- 2002-04-04 CN CN02801114A patent/CN1461239A/zh active Pending
- 2002-04-04 CA CA002416034A patent/CA2416034A1/en not_active Abandoned
- 2002-04-04 US US10/333,076 patent/US6935702B2/en not_active Expired - Fee Related
- 2002-04-04 EP EP02714461A patent/EP1375004A4/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63221857A (ja) * | 1987-03-10 | 1988-09-14 | 桜井 誠也 | 破砕装置 |
EP0777102A2 (en) * | 1995-10-30 | 1997-06-04 | Soosan Special Purpose Vehicle, Co., Ltd. | Rock fragmentation system using Gold-Schmidt method |
EP1033551A2 (en) * | 1999-03-02 | 2000-09-06 | Korea Accelerator and Plasma Research Association (KAPRA) | Electro-power impact cell for plasma blasting |
Non-Patent Citations (1)
Title |
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See also references of EP1375004A4 * |
Also Published As
Publication number | Publication date |
---|---|
KR100512812B1 (ko) | 2005-09-13 |
US6935702B2 (en) | 2005-08-30 |
EP1375004A1 (en) | 2004-01-02 |
KR20030007874A (ko) | 2003-01-23 |
US20040026548A1 (en) | 2004-02-12 |
EP1375004A4 (en) | 2005-03-16 |
CN1461239A (zh) | 2003-12-10 |
CA2416034A1 (en) | 2003-01-13 |
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