KR100551547B1 - Equipment for production of metal, alloy and ceramic nano powders by simultaneous wire feeding of electrical explosion of wire and it's method - Google Patents

Abstract

The present invention relates to a method of manufacturing a metal, alloy or ceramic nanopowder by an electric explosion method and a device thereof, wherein a plurality of wires are simultaneously used using an electrical explosion method (EEW). And control the distance between adjacent wires to selectively produce nanoalloy powder, nanoceramic powder, and single nanopowder with particle size of about 100nm or less and simplify the collection process. Height relates to methods and apparatus.

Electroexplosion, Metal, Ceramic, Nano Metal Powder, Nano Ceramic Powder, Nano Alloy Powder

Description

Equipment for production of metal, alloy and ceramic nano powders by simultaneous wire feeding of electrical explosion of wire and it's method}             

1 is a working principle of the pulse generator of the present invention,

2 is a working principle of the present invention wire supply device,

Figure 3a is an overall configuration diagram of a nano-powder (metal) device by the electroexplosion method of the present invention,

3b is an overall configuration diagram of a nanopowder device according to the present invention electroexplosion method,

3C is a plan view and a front sectional view of a cyclone having a buffer function used in FIGS. 3A and 3B;

4 is an operation principle diagram of a conventional pulse generator of the applicant applicant,

5 is an operating principle of the applicant's conventional wire supply device,

Figure 6 is an overall configuration of the nano-metal powder apparatus by the applicant's conventional electroexplosion method.

<Description of the symbols for the main parts of the drawings>

A: pulse generator B: wire explosion reactor

C: Wire supply device D: Gas supply device

E: Powder Collector

(1): voltage (2): capacitor

(3): Upper resistance on voltage divider (4): Lower resistance on voltage divider

(5): high voltage electrode of spark gap (6): spark gap

(7): drive electrode of spark gap (8): low voltage electrode of spark gap

(9): high voltage electrode of reactor (11): insulator

12: resistance 13: wire

(15): guided wave shaping device (16): combustion wave shaping module

(17): high voltage ground (18): ground switch

21: wire coil 22: measuring roller

(23): free axis of rotation (24): hole in measuring roller

(25): wire deformation module (27): electric lamp

(28): photoelectric inverter (29): rod

(31): reactor hole (32): working gas inlet

33: powder and working gas outlet 34: pump

(41): trap 42: cyclone with buffer function

43: hopper 46: electric filter

(48): mechanical filter (51): argon gas cylinder

(52): oxygen tank (53): oxygen supply quantity control device

(54): oxygen partial pressure detector (55): blower

(60) Electric filter high voltage supply (61): control, monitoring console

The present invention relates to a method for producing a metal, alloy or ceramic nanopowder by an electroexplosive method to simultaneously insert a plurality of metal wires and to a device thereof, and more specifically to an electric explosion method by simultaneously adding a metal, alloy and chemical materials ( Electrical explosion of wire method (EEW) relates to a manufacturing method and apparatus for obtaining nanoalloy (metal) powder or nano (composite) ceramic powder having a particle size of about 100 nm or less.

In general, a single metal powder may be prepared by atomization, liquid phase reduction, or plasma.

However, the atomization method may not produce a powder in nano size, and may produce a powder having a size of about 50 μm.

In addition, the liquid reduction method can produce only a few precious metals in the nano-size has a disadvantage that it can not be applied to the general metal powder.

In addition, the plasma method has a problem in that power consumption is greater than that of production and a separate device for preventing oxidation is required when powder is collected, and thus, the conventional method could not stably produce nano-sized metal powder.

As a method for solving such a problem, there is Korean Patent Application No. 10-2001-0029606, which has been previously filed by the present applicant.

To describe the main contents of the pre- filed invention with reference to Figures 4 to 6,

The nano powder manufacturing method includes supplying a wire into a reactor from a wire supply device, measuring a wire explosion length with a measuring roller in the wire supply device, and generating a spark gap driving signal using the wire explosion length measurement signal. Charging the battery until the driving signal is supplied to the driving electrode of the spark gap; and a high voltage of the battery charged with the driving signal of the spark gap passes through the insulator between the high voltage electrode and the low voltage electrode of the spark gap. The method comprises the steps of supplying a high voltage electrode of the reactor, the wire supplied into the reactor at the high voltage to explode to obtain a nano metal powder, and collecting the nano metal powder at the correct oxygen pressure by an electric explosion method Characterized by a method for producing a metal nanopowder,

In the device construction of the nanopowder, the low voltage electrode 8 of the spark gap 6 of the pulse generator A generating the high voltage and the insulator 11 of the wire explosion reactor B are provided. Is connected, the wire supply device (C) for supplying a wire to the upper side of the wire explosion reactor is connected, the blower of the gas providing device (D) is connected to the upper side of the wire explosion reactor and the powder collecting device (E) Buffer tank is connected, and the wire supply device is electrically connected and coupled to the induction wave forming module 15 for driving the spark gap 6,

The pulse generator (A) is composed of three electrode discharge device used as a driven rectifier, the low voltage electrode (8) is connected to the high voltage electrode (5) through a through insulator, driving the spark gap (6) The electrode 7 is grounded across the resistor, and the high voltage electrode is electrically connected to the charger 2 and the upper resistor 3 of the voltage divider, and the low voltage electrode is connected to the high voltage electrode of the reactor through the insulator 11. 9) is connected to the resistor 12 and grounded, one side of the driving electrode is configured to be connected to the voltage divider lower resistance (4) and the other side to the combustion wave forming module 16,

The wire explosion reactor (B) is connected to the low voltage electrode (8) of the pulse generator (A) through the insulator (11), the reactor high voltage electrode (9) at the lower side, the wire supply device (C) for supplying a wire to the upper side ) Is connected to the upper side of the working gas inlet and the lower side of the metal powder and the outlet gas outlet is provided, and when the gas is consumed in the reactor inside to transform the radial flow of the working gas into the axle flow The hole 31 is provided,

The wire explosion reactor (B) is provided with a high voltage ground (17) during the wire explosion reaction around the upper inlet to which the wire is supplied,

The wire supply device (C) is configured by placing the measuring roller 22 between the wire coil 21 and the wire deformation module 25, the measuring roller 22 is a few that can measure the length of the explosion wire And a hole 24, through which the light of the electric lamp 27 enters the photoelectric conversion device 28 to measure the length of the explosion wire and transmit a signal to trigger the spark gap,

The gas supply device (D) is a blower 55 is installed at the front end of the oxygen 52 and the argon gas 51 is supplied with a working gas, the oxygen partial pressure detector (B) between the blower and the gas supply device ( 54) is installed and connected to the mechanical filter 48 of the powder collecting device (E),

The powder collecting device (E) is connected to the working gas outlet 33 of the wire explosion reactor to the trap 41 and the buffer tank 42, the buffer tank outlet is continuously connected to the first and second cyclones (44) 45, the cyclone outlet is connected to the mechanical filter 48 through the first and second electrical filters 46 and 47 connected in series, and the mechanical connection filter is the oxygen partial pressure detector 54 of the gas supply device. It is characterized in that the connection is configured.

However, there is a problem that the production of the alloy or composite ceramic nano-powder is not possible even in the present applicant's invention.

In addition, although the apparatus for collecting the produced powder is composed of a multi-stage buffer cyclone, a filter and a hopper, there is a problem that the yield of the desired powder is only 50-60%.

An object of the present invention for solving the above problems is to further improve the invention of the applicant of the previous application (Korean Patent Application No. 10-2001-0029606) using the electrical explosion (wire explosion) method (EEW) Provide a method and apparatus for supplying a plurality of wires to selectively produce nanoalloy powder, nanoceramic powder, single nanopowder having a particle size of about 100 nm or less and simplify the collection process to increase the yield of the produced powder It is.

An object of the present invention as described above is to provide a method and device comprising a powder collecting device consisting of a multi-purpose cyclone having a wire supply device and a buffer function for simultaneously supplying two or more wires to the wire explosion reactor. Is achieved.

The present invention to achieve the object as described above and to perform the problem for eliminating the conventional drawback is a method of supplying the wire into the reactor from the wire feeder, and the wire explosion length to the measuring roller in the wire feeder Measuring, generating a spark gap driving signal with the wire explosion length measuring signal, charging a battery until the driving signal is supplied to a driving electrode of the spark gap, and driving the spark gap driving signal. The high voltage of the charged battery penetrates the insulator between the high voltage electrode and the low voltage electrode of the spark gap and is supplied to the high voltage electrode of the reactor, and the nano-powder is obtained by exploding the wire supplied into the reactor at the high voltage; A method of making a nanopowder comprising collecting the powder at an accurate oxygen pressure,

In the step of supplying the wire to be supplied with a plurality of wires (metal, alloy, ceramic) at the same speed,

The supplied wire is exploded to adjust the distance between the wires supplied in the step of obtaining nanopowder to obtain a desired alloy (composite ceramic nanopowder) or single nanopowder,

The collection step is characterized in that the complex collecting step using a cyclone having a buffer function to simplify the buffer for preventing aggregation and the cyclone for powder classification into a single device.

The distance between the two or the plurality of wires supplied in the step of obtaining the nano powder by exploding the supplied wire is controlled so that the distance between the wires (metal, ceramic) is 26 mm or less for the production of alloy (composite ceramic) nano powder. .

The distance between the two or the plurality of wires supplied in the step of obtaining the nano powder by exploding the supplied wires is controlled to be 78 mm or more in order to simultaneously produce twice the single metal (ceramic).

In order to produce a mixture of alloy (composite ceramic) powder and monometal (ceramic) powder between two or more wires supplied in the step of obtaining the nano powder by exploding the supplied wire, the distance is larger than 26 mm and 78 mm. Control smaller.

The device configuration of the present invention is a pulse generator (A) for generating a high voltage to explode the wire explosion reactor, a wire explosion reactor (B) is formed of nano-powder by exploding the supplied wire, wire explosion reactor (B Nanopowder consisting of a wire supply device (C) for supplying wire to the wire, a gas supply device (D) for providing gas to the wire explosion reactor, and a powder collecting device (E) for collecting the powder discharged from the explosion reactor. In the device for manufacturing,

In the wire explosion reactor (B), the reactor high voltage electrode (9) is connected to the low voltage electrode (8) of the pulse generator (A) through the insulator (11) at the lower side, and supplies two or more wires to the upper side. The wire supply device (C) is connected, and the inlet of the working gas enters at the top of the side and the outlet of the metal powder and the working gas are discharged at the bottom of the side, and the radial flow of the working gas when the gas is consumed in the reactor therein. It is provided with two holes 31 to deform the axle flow, by adjusting the distance between the two or a plurality of wires to be supplied to produce an alloy (composite ceramic) nano powder or a single nano material, the wire is supplied It is configured to be provided with a high voltage ground (17) during the wire explosion reaction around the upper inlet,

The wire supply device (C) is provided with two or a plurality of, the neighboring wire coils 21 are configured to rotate in the same axis interlocking, each wire supply device (C) is a wire coil 21 and a wire The measuring roller 22 is positioned between the deformation modules 25, but the measuring roller 22 has several holes 24 for measuring the length of the explosion wire, and the electric lamp 27 is used as the holes. The light is incident on the photoelectric conversion device 28 is characterized in that configured to transmit a signal to trigger the spark gap by measuring the length of the explosion wire.

The powder collecting device E, which is installed after the wire explosion reactor B, is connected to the working gas outlet 33 of the wire explosion reactor 33 to produce an alloy (metal). After the connection to the 42 is connected to the mechanical filter 48, the mechanical connection filter is configured to be connected to the oxygen partial pressure detector 54 of the gas supply device.

The powder collecting device E, which is installed after the wire explosion reactor B, adds an electric filter 46 between the cyclone 42 having a buffer function and the mechanical filter 48 to produce a (composite) ceramic. It is configured to include.

The wire explosion reactor (B) is configured so that the distance between two or more wires supplied is less than 26 mm between the wires (metal, ceramic) for the production of alloy (composite ceramic) nanopowder.

The wire explosion reactor (B) is configured so that the distance between the two or a plurality of wires supplied to be 78mm or more to produce twice the single metal (ceramic) at the same time.

The wire explosion reactor (B) is composed of a device larger than 26 mm and smaller than 78 mm to produce a mixed distance between two or a plurality of wires supplied by mixing alloy (composite ceramic) powder and single metal (ceramic). .

The cyclone 42 having the buffer function is composed of a flow path for cooling the outside and a double flow path for cooling the inside of the cyclone.

Hereinafter, the configuration and the operation of the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an operating principle diagram of the pulse generator of the present invention, Figure 2 is an operating principle diagram of the wire supply device of the present invention, Figure 3a is an overall configuration diagram of the nano-powder (metal) device by the electroexplosion method of the present invention, Figure 3b Fig. 3C shows a plan view and a front sectional view of a cyclone having a buffer function used in Figs. 3A and 3B. The schematic configuration of the present invention is a power supply, It consists of a battery, a high voltage wire explosion reactor, a ground electrode, a driven switchboard / commutator of a power storage device, a wire feeder and a powder collector.

As shown in Fig. 1, the present invention uses three electrode dischargers as driven rectifiers.

Here, the low voltage electrode 8 is connected to the high voltage electrode 9 of the wire explosion reactor through a penetrated insulator 11, and is grounded across the resistor 12 at one side.

The high voltage electrode 5 is electrically connected to the capacitor 2 and the upper arm 3 of the voltage divider.

One side of the driving electrode 7 is connected to an incendiary pulse forming module 16, and the other side is connected to a lower arm 4 of the voltage divider.

In particular, the commutation of the spark gap 6 takes place during the dividing process of the decreasing gap between the wire and the high voltage electrode reactor.

In addition, two wires from the wire supply device (C) are supplied to the wire explosion reactor (B).

Some configuration of the present invention as described above is a power supply and switchboard including a battery, a wire explosion reactor and grounding having a high voltage, a wire feeder including a wire deformation mechanism, a gas supply, a powder collector including an exhaust, cyclone, powder capture It works under the overall configuration with an electrical volume filter for the powder and a powder classifier with truncated cones.

As shown in Figure 2, the basic configuration of the wire supply device (C) itself is the wire coil 21, measuring roller 22 measured from the top in the same manner as the applicant's previously filed Korean Patent Application No. 10-2001-0029606 It consists of a hole 24 of the roller, the wire deformation module 25 is configured to supply the wire (13) to the wire explosion reactor (B), the wire explosion reactor (B) is also basically a reactor hole (31), operation Although composed of a gas inlet 32 and a powder and a working gas outlet 33, the most important change is that the device is configured to supply two wires simultaneously and explode at the same time.

Such simultaneous supply and simultaneous explosive configuration can not be easily invented from the previous application, and various device configurations were tested to adopt the most suitable configuration.

That is, in this invention which improved the prior-application structure, the apparatus is comprised so that both wire coils 21 may share the axis which drives the wire coil 21 so that two wires may be supplied to the wire explosion reactor B simultaneously.

In addition, the two wires supplied by such a configuration are simultaneously supplied to the wire explosion reactor (B) to cause an explosion reaction. In this case, the device is configured to adjust the distance between adjacent wires, such as nano alloy powder, nano composite ceramic powder, and 2 Nanopowder with pear production will be produced.

The reason for configuring the wire supply apparatus using the same axis as described above is as follows.

Existing metal wire injection device (Korea Patent Application No. 2001-29606) was able to input only one metal wire, but this device was designed to discharge two or more wires simultaneously and discharge at the same time. The wire to wire distance can be changed to 26mm, 52mm and 78mm to produce the desired metal powder and alloy powder or nanopowder of single material.

That is, the distance between the wires can be arbitrarily adjusted by arbitrarily adjusting the distance between the rollers to the left and right by installing several rollers on a single axis.

As with single-wire wire supplies, the multi-wire wire supplies are grounded inside the explosion chamber to prevent high voltage and large currents from flowing into the device, so that there is no risk of device modification.

According to the type and form of the powder (alloy, composite powder, single powder, oxide powder, etc.), the distance between the wires may be adjusted to an optimum distance.

In addition, the two metal wires at the same time can greatly increase the production.

The apparatus for supplying two wires of the present invention as described above has been considered in several ways.

The first is the way each wire is supplied by an independent device, and the second is the way it is fed by one device by twisting two or more wires. Third, there are several reels in a single shaft driven by one motor. This is how it is supplied.

The above methods were analyzed and the first method was simple as a result of preliminary experiments.

However, when wires are supplied independently of each other, even if the supply speed of each wire is slightly changed, the difference becomes more severe as time passes, and the operation cannot be continued, and the minimum distance between the wires is at least 50-60mm or more. It could not be alloyed.

In the second method, the wires were twisted and caught on the reel and operated irregularly. Furthermore, the twisted wire was not inserted into the bearing when installed in the chamber. The powder was ejected to the outside part during the explosion.

Considering these considerations, the method of installing two rollers on a single shaft was selected. In this case, the distance between wires can be minimized (26mm) compared to the first method, and it can be supplied more stably than the second method.

In addition, some design changes have the advantage of being able to feed three or more wires simultaneously.

The following is an embodiment according to the experimental results according to the distance difference as described above.

(Example 1)

Wire to wire distance = 26 mm

When using two different metals, the powder is mostly made of alloy powder or intermetallic compound powder.

-Powder size is about 100nm

The following is the TEM photograph of the different metal inputs.

(1) Al-Fe simultaneous feeding: wire to wire distance: 26 mm

Formation of FeAl ₂ and FeAl ₃ intermetallic compounds, some single metals also exist

              Transmission Electron Microscopy (TEM)

(2) Simultaneous W-Al input: wire to wire distance: 26 mm

WAl _x complex phase also contains some single metal powder

             Transmission Electron Microscopy (TEM)

(Example 2)

Wire to wire distance = 52 mm

The powders produced are alloyed or mixed with intermetallic compounds and monometals.

The size of the powder is about 100 nm but some larger powders (more than 200 nm) are produced.

(Example 3)

Wire to wire distance = 78 mm

The powders produced are not alloyed and form a single phase powder.

-When using the same type of metal wire, the output is doubled compared to the single metal wire injection device.

Therefore, for the production of alloy powder, two different metals should be added at the same time, but the distance between wires (metals) should be less than 26 mm to evaporate and condensate to induce alloying. Evaporation and condensation with a distance of 78 mm or more can produce a single metal with a size of 100 nm and increase production.

Figure 3a shows the overall configuration of the nano-powder (metal) device by the electroexplosion method of the present invention, Figure 3b shows the overall configuration of the nano-powder device by the electroexplosion method of the present invention, the basic configuration of the Same as the applicant's invention Korean Patent Application No. 10-2001-29606, but the most important change is the complexity due to the multi-stage configuration of the buffer, the hopper, the plurality of cyclones, the plurality of electric filters, which is a problem of the patent collecting device unit, In spite of such a configuration, the problem of low yield is composed of a simple collecting device but high yield.

That is, in the case of obtaining the nano-metal or alloy powder, the collecting device part of the present invention is a cyclone 42 and the hopper 43 having a buffer function as shown in Figure 3a and one electric filter formed in the next step ( 46) and the hopper 43, the mechanical filter 48 and the hopper 43, and the electric filter high voltage supply device 60 for supplying power to the electric filter 46,

When obtaining the ceramic powder, as shown in FIG. 3b, the apparatus was simply composed of a cyclone 42 and a hopper 43 having a buffer function, and a mechanical filter 48 and a hopper 43.

The reason why the yield is good even though the configuration is drastically simplified compared to the previous configuration as described above is obtained by the device configuration of the cyclone 42 having the buffer function.

In other words, although the conventional collecting device is configured in different stages of different sizes, the powder classified in each apparatus has a disadvantage of being classified by mixing small unwanted powders in addition to the powder of the desired size.

For example, in the case of the powder collected in the primary cyclone, it is expected that the 500 nm sized powder is collected, but there is a disadvantage in that the fine powder is mixed at the same time in addition to the 500 nm sized powder.

For this reason, about 30% of the 100nm-class powder produced is undesired to the primary and secondary cyclones.

Another thing is that when the powders are agglomerated, even small powders behave like large powders and become caught in primary and secondary cyclones.

For this reason, by cooling only the outside of the buffer tank to prevent the agglomeration from being cooled to the inside to prevent the agglomeration, the agglomeration of the manufactured fine powder can be largely prevented.

As shown in FIG. 3C, the cyclone 42 having a buffer function is configured by making a cooling device inside the cyclone as well as external cooling.

In conclusion, the buffer function prevents agglomeration by quenching through the internal and external cooling while keeping the particles away from the conventional function that simply prevents the agglomeration between particles and prevents the agglomeration. When classified, small particles can be mixed and prevented from being collected.

The following is an embodiment related to the yield of the collecting device portion of the improved device configuration of the present invention.

The yield is determined by the amount collected in the final filter through each step.

-The existing device yield is about 50-60%, but the device configuration of the present invention is greatly improved to 75-85%.

-In addition, the production cost can be greatly reduced by simplifying the equipment.

1. Recovery amount according to voltage

Experimental conditions: Al wire (0.4 mm in diameter, 86 mm in length), 1000 pulses, 0.5Hz, Ar pressure experiment at 4 atm.

Example 1-23 kV Voltage

Existing device: 1 cyclone 2 cyclone Filter

                29.4% 12.7% 57.9% (final yield)

Inventive device: cyclone with buffer Filter

                  13.5% 86.5%

Example 2-28 kV Voltage

Existing device: 1 cyclone 2 cyclone Filter

                26.8% 20.2% 51.5% (final yield)

Device of the Invention: cyclone with buffer Filter

                      23.0% 77.0%

2. Recovery amount according to Ar pressure

Test conditions: 28kV, using Al wire (diameter 0.4 mm, length 86 mm), experiment under 1000 pulse, 0.5Hz.

Example 1 Ar Pressure 3 Atm

Existing device: 1 cyclone 2 cyclone Filter

               33.3% 15.0% 51.7% (final yield)

Device of the Invention: cyclone with buffer Filter

                  24.5% 75.5%

Example 2 Ar pressure 4 atmospheres

Existing device: 1 cyclone 2 cyclone Filter

                26.8% 20.2% 51.5% (final yield)

Device of the Invention: cyclone with buffer Filter

                     23.0% 77.0%

Example 3 Ar pressure 5 atmospheres

Existing device: 1 cyclone 2 cyclone Filter

               44.4% 12.9% 42.7% (final yield)

Device of the Invention: cyclone with buffer Filter

                      22.2% 77.8%

3. Recovery amount according to pulse

Experimental conditions: 28kV, using Al wire (0.4 mm in diameter, 86 mm in length), 1000 pulse, Ar pressure under 4 atm.

Example 1-0.2 Hz

Existing device: 1 cyclone 2 cyclone Filter

                19.2% 13.0% 66.5% (final yield)

Device of the Invention: cyclone with buffer Filter

                      15.4% 84.6%

Example 2-0.5 Hz

Existing device: 1 cyclone 2 cyclone Filter

                26.8% 20.2% 51.5% (final yield)

Inventive device: cyclone with buffer Filter

                  23.0% 77.0%

Hereinafter, the overall configuration, including the conventional device configuration of the present invention and the applicant of the present application as described above are as follows.

The device configuration of the present invention is a pulse generator (A) for generating a high voltage to explode the wire explosion reactor, a wire explosion reactor (B) and the wire explosion reactor (B) is formed of nanopowder by exploding the supplied wire ( A wire supply device (C) for supplying wires to B), a gas supply device (D) for providing gas to the wire explosion reactor, and a powder collecting device (E) for collecting powder discharged from the explosion reactor,

The pulse generator (A) is composed of three electrode discharge device used as a driven rectifier, the low voltage electrode (8) is connected to the high voltage electrode (5) through a through insulator, driving the spark gap (6) The electrode 7 is grounded across the resistor, and the high voltage electrode is electrically connected to the charger 2 and the upper resistor 3 of the voltage divider, and the low voltage electrode is connected to the high voltage electrode of the reactor through the insulator 11. 9) is connected to the resistor 12 and grounded, one side of the driving electrode is configured to be connected to the voltage divider lower resistance (4) and the other side to the combustion wave forming module 16,

In the wire explosion reactor (B), the reactor high voltage electrode (9) is connected to the low voltage electrode (8) of the pulse generator (A) through the insulator (11) at the lower side, and supplies two or more wires to the upper side. The wire supply device (C) is connected, and the inlet of the working gas enters at the top of the side and the outlet of the metal powder and the working gas are discharged at the bottom of the side, and the radial flow of the working gas when the gas is consumed in the reactor inside. It is provided with two holes 31 for transforming the axle flow,

The distance between two or more wires to be supplied is composed so that the distance between wires (metals) is 26 mm or less for the production of alloy (composite ceramic) nanopowders, and 78 mm or more to produce twice the single metal (ceramic) at the same time. In order to produce a mixture of alloy (composite ceramic) powder and single metal (ceramic), the distance is larger than 26 mm and smaller than 78 mm,

The wire explosion reactor (B) is configured to be provided with a high voltage ground (17) during the wire explosion reaction around the upper inlet to which the wire is supplied,

The wire supply device (C) is provided with two or a plurality of, the neighboring wire coils 21 are configured to rotate in the same axis interlocking, each wire supply device (C) is a wire coil 21 and a wire The measuring roller 22 is positioned between the deformation modules 25, but the measuring roller 22 has several holes 24 for measuring the length of the explosion wire, and the electric lamp 27 is used as the holes. Of light is incident on the photoelectric converter 28 to measure the length of the explosion wire and transmit a signal to trigger the spark gap,

The gas supply device (D) is a blower 55 is installed at the front end of the oxygen 52 and the argon gas 51 is supplied with the working gas, the oxygen partial pressure detector (B) between the blower and the gas supply device ( 54) is installed and connected to the mechanical filter 48 of the powder collecting device (E),

In order to produce an alloy (metal), the powder collecting device E is connected to the working gas outlet 33 of the wire explosion reactor, connected to the trap 41 and the cyclone 42 having a buffer function, and then a mechanical filter ( 48), the mechanical connection filter is configured to be connected to the oxygen partial pressure detector 54 of the gas supply device,

In order to produce a (composite) ceramic, an electric filter 46 is formed between the cyclone 42 having a buffer function and the mechanical filter 48.

Hereinafter, the operation of the present invention will be described as follows.

The high voltage source 1 charges the energy storage battery 2 until the selected voltage is supplied to the voltage dividers 3 and 4 and the high voltage electrode 5 of the spark gap 6.

The charge voltage portion from the lower resistor 4 of the voltage divider is supplied to the drive electrode 7 of the spark gap. The low voltage electrode 8 of the spark gap is also connected to the high voltage electrode 9 of the reactor 10 via the insulator 11. The low voltage electrode is grounded with resistor 12.

In the spark gap 6 raised between electrodes 5-7 and 7-8, the gaps lie at a distance beyond which the distance between the electrodes is about 1.5 to 2 times the selected operating voltage.

In practice, the resistance of the voltage divider is selected from the state of excessive discharge time of the capacitor 2 through the voltage divider by comparing the charge time of the capacitor and the capacitance between the electrodes 7, 8 to a very small value in resistor 4. Change in proportion to voltage.

When the wire is supplied by the wire feeder C and reaches the electrode 9 (when the gap reaches about 1 mm), the guided wave former is converted to a lead that forms a braking wave for the spark gap 6. Signal to the sofa forming module (16). The generator rotates, and the combustion wave having a polarity opposite to the polarity of the voltage in the capacitor 2 reaches the drive electrode and the spark gap starts.

The capacitor is discharged to the wire 13 and the wire explodes. In the contemplated arrangement, the resistor 12 is selected for the continuous discharge of the capacitor through the resistor. In most cases with a value of 1.5 kΩ, two order differences are provided in time.

Switchboards with field distortion have a gentler range of operating voltages without rearrangement of the gaps compared to trigger switchboards.

Trigger switchboard operation only occurs because the plasma moves in the major gap and ultraviolet radiation ionizes the gas. The switchboard amplitude of the proposed driving wave is proportional to the converted voltage. Thus, field amplification and sudden distortion amplification in both gaps are sharp spikes (in this case the drive electrode is a 3 mm thick plate with a 30 mm diameter center hole). Occurs during supply.

The opposite is true when compared to the voltage converted at the anode of the driving wave. 40kv is the working voltage in the advanced switchgear. This voltage is divided by a voltage divider by 1: 3 (200 MΩ on top, 100 MΩ on bottom), and the +13.3 kV voltage is the difference between the driven and grounded electrodes. The system in the switchgear gap is uniform and the air breakdown voltage stress is 30 kv / cm. If the lower gap width is equal to 7 mm (17 times more than at break) and the upper gap width is equal to 1.5 cm (1.7 times more than at break) and then the driving wave supplied is -40 kV (1 J energy), The voltage stresses in the upper and lower gaps are 1.8 and 1.9 times more than the brake voltage stresses.

At the same time the distortion and amplification of the system takes place at the edge of the hole in the drive electrode. This leads to a quick break of the bottom gap and then to a break of the top gap. Large square edges that distort the system as compared to the trigger needle drive voltage allow to increase the life of the switchboard without replacing the electrodes.

An additional measuring roller is in the wire tool between the wire coil and the wire deformation module. The measuring roller is tightly tied to the free axis of rotation and the measuring roller is rotated by the supplied wire. The measuring roller has a circumferential length equal to the length of the explosion wire or divided by the length of the explosion wire. The measuring roller also has several holes.

Light from the electric lamp falls into a photoelectric converter that converts it into a drive wave shaped device. If a mechanical switchboard is used in the drive wave forming device then the rod is on the shaft.

The switchboard is activated by the rotation of the rod at the selected angle. If a magnet is used instead of a rod, the switchboard (magnetically actuated sealed switch) has a magnetic driver. In this case the measuring rollers are made of insulators to prevent high voltages from reaching the drive system.

In the free rotating shaft including the measuring roller, the supply of the explosive wave and the supply of the wire of the selected length occurred simultaneously. The measuring roller is reduced in motion or stopped if the wire slips. In this case, the supply of explosive waves takes place at the moment of supply of the required length of wire. Intermediate traps and buffer tanks connected by t-bend are placed in the powder collection unit instead of the powder classifier.

The cyclone inlet with trap and buffer functions is connected to the working gas outlet from the reactor.

Trap tends to trap large particles (which occur in the case of wire end breaks), and cyclones with buffer functions tend to trap particles with diameters up to 0.5-1 μm.

The principle of operation of the device is based on the law of inertia, and the large particles and small particles entering the cyclone through the T-band do not have time to change direction with the working gas and move quickly. Separated from the stream rotated 360 degrees and dropped to the bottom, small particles move along the stream along with the working gas to the filter. Previously complex devices simply separated here and went straight to the filter.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims.

In the present invention configured as described above, two wires are simultaneously introduced using an electrical explosion of wire method (EEW), and the distance between the wires is controlled, thereby producing nano alloy powders and composite nanoceramic powders and double the yield. Eggplant is a useful invention with the advantage of being able to produce a single material powder, and greatly increase the yield while simplifying the collecting device is an invention that is expected to be greatly used in the industry.

Claims (11)

delete Supplying a wire into a reactor in a wire supply device, measuring a wire explosion length with a measuring roller in the wire supply device, generating a spark gap driving signal using the wire explosion length measurement signal, and Charging the battery until the driving signal is supplied to the driving electrode of the spark gap, and the high voltage of the battery charged with the driving signal of the spark gap passes through the insulator between the high voltage electrode and the low voltage electrode of the spark gap, and then the high voltage electrode of the reactor. In the method of manufacturing a nanopowder comprising the step of supplying, the wire supplied into the reactor at a high voltage to explode to obtain a nanopowder, and collecting the nanopowder at the correct oxygen pressure, The supplying of the wires allows a plurality of metal or ceramic wires to be supplied at the same speed. The step of obtaining the nanopowder by exploding the supplied wire, the step of controlling the distance between the two or a plurality of wires to be supplied so that the distance between the wires to 26mm or less for the production of alloy (composite ceramic) nanopowder; Controlling the distance between the two or the plurality of wires supplied to be 78 mm or more in order to simultaneously produce a single metal (ceramic) twice; And controlling the distance to be larger than 26 mm and smaller than 78 mm in order to produce a mixture of an alloy (composite ceramic) powder and a single metal (ceramic). By controlling the distance between the wires supplied by controlling any one step selected from among the desired alloy (compound ceramic nano powder) or to obtain a single nano powder, The collecting step is characterized by comprising a plurality of complex collecting step by using a cyclone with a buffer function to quench through internal and external cooling to prevent agglomeration and to simultaneously classify the particles prevented from agglomeration into large cyclones. Method for producing metal, alloy or ceramic nanopowder by electroexplosion method which simultaneously inserts wires. delete delete delete A pulse generator (A) that generates a high voltage to cause an explosion of the wire explosion reactor, a wire explosion reactor (B) in which the supplied wire is exploded to be formed into nanopowders, and a wire explosion reactor (B) In the apparatus for producing a nano-powder comprising a wire supply device (C), a gas providing device (D) for providing gas to the wire explosion reactor, and a powder collecting device (E) for collecting the powder discharged from the explosion reactor , In the wire explosion reactor (B), the reactor high voltage electrode (9) is connected to the low voltage electrode (8) of the pulse generator (A) through the insulator (11) at the lower side, and supplies two or more wires to the upper side. The wire supply device (C) is connected, and the inlet of the working gas enters at the top of the side and the outlet of the metal powder and the working gas are discharged at the bottom of the side, and the radial flow of the working gas when the gas is consumed in the reactor therein. It is provided with two holes 31 to deform the axle flow, by adjusting the distance between the two or a plurality of wires to be supplied to produce an alloy (composite ceramic) nano powder or a single nano material, the wire is supplied It is configured to be provided with a high voltage ground (17) during the wire explosion reaction around the upper inlet, The wire supply device (C) is provided with two or a plurality of, the neighboring wire coils 21 are configured to rotate in the same axis interlocking, each wire supply device (C) is a wire coil 21 and a wire The measuring roller 22 is positioned between the deformation modules 25, but the measuring roller 22 has several holes 24 for measuring the length of the explosion wire, and the electric lamp 27 is used as the holes. Of light is incident on the photoelectric converter 28 to measure the length of the explosion wire and transmit a signal to trigger the spark gap, The powder trapping device E installed after the wire explosion reactor B is connected to the working gas outlet 33 of the wire explosion reactor for producing an alloy (metal), and has a trap 41 and a cyclone having a buffer function. (42) and then to a mechanical filter (48), which is connected to an oxygen partial pressure detector (54) of the gas supply device or a cyclone (42) having a buffer function to produce (composite) ceramics. ) And any one selected from the configuration further including an electric filter 46 between the mechanical filter 48, The wire explosion reactor (B) is composed of a device so that the distance between the two or a plurality of wires supplied to the alloy (composite ceramic) nanopowder so that the distance between the wires is less than 26 mm, and a single metal (ceramic) at the same time In order to produce a ship, the device is configured to be 78 mm or more, and in order to produce a mixture of alloy (composite ceramic) powder and a single metal (ceramic), a plurality of wires comprising a device having a distance larger than 26 mm and smaller than 78 mm are produced. Metal, alloy or ceramic nano-powder manufacturing apparatus by an electroexplosive method to simultaneously input. delete delete delete delete The method of claim 6, The cyclone 42 having the buffer function comprises a flow path for cooling the outside and a double flow path for cooling the inside of the cyclone. Nano powder production apparatus.

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