KR101606370B1 - manufacturing method of nano-powder, and apparatus for the same - Google Patents

Abstract

The present invention relates to a technique for manufacturing a nano powder at a low cost. In order to apply power to an explosion chamber from a charged high-capacity low-voltage capacitor, the explosion chamber is connected to a first high- The relay switch is switched on to charge the explosion chamber, and then the grounded probe wire is drawn into the explosion chamber to explode the explosion member. Thus, it is possible to adopt general parts in the industry, so that the nano powder can be manufactured at low cost . According to the present invention, it is possible to eliminate expensive high-voltage (several tens kV) capacitors by adopting a low-voltage large-capacity low-voltage capacitor (having an internal pressure of about 400 V to 500 V) .

Description

TECHNICAL FIELD The present invention relates to a method of manufacturing a nano-powder,

TECHNICAL FIELD The present invention relates to a technique for manufacturing nanopowders at low cost. More specifically, the present invention switches a first relay switch, which connects the high-capacity low-voltage capacitor and the explosion chamber in advance, with the explosion chamber not grounded to apply power to the explosion chamber from the charged high-capacity low-voltage capacitor, And a probe wire which is grounded into the explosion chamber is charged to detonate the explosive member. Thus, general parts of the industry can be adopted, and a technology for manufacturing the nano powder at a low cost.

Recently, a technique for manufacturing nanostructured power materials has become very important.

Since the specific surface area increases as the powder material is increased to very fine units, it exhibits unique electromagnetic, mechanical, and catalytic properties that can not be obtained in a material having a relatively large specific surface area. .

In the past, as one method for obtaining such ultrafine powder, nanosilicone powder by mechanical pulverization was redispersed in an active or inactive matrix, or a chemical synthesis process. The nanosilicon powder obtained through such conventional processes has a low purity and low uniformity of particles.

In order to overcome such a problem, there is known a technique of pulverizing a member by gas explosion in a gas, but the gas explosion method has a problem of loss of energy transmission due to surface plasma and thus a poor quality of powder.

The most recent technique to overcome the problem of electric explosion in a gas is a method of pulverizing a member by electric explosion in a liquid.

The technique of explosion of a member in liquid and pulverization in nano unit is the most advanced technology at present.

Conventionally, capacitors charging the explosion chamber are designed for high-priced high-voltage (tens of kV), and the part switching the connection with the explosion chamber adopts an expensive mechanical discharge switch or air gap switch capable of switching several tens of kV (For example, 400V to 500V) capacitors used in general industrial applications.

In other words, in order to economically manufacture nano powder at a low cost, it is necessary to adopt a low-cost general industrial capacitor. If a mechanical discharge switch or an air gap switch is employed in a low-cost, large-capacity low-voltage capacitor, There is a disadvantage that a spark or a discharge occurs due to the flow, the energy consumption is large, and the durability of the switch itself is rapidly deteriorated.

In addition, when a high-voltage capacitor having a high price is employed as in the prior art, a DC charging apparatus for charging the high-voltage capacitor has a drawback in that a high-priced DC power source must be charged.
[Prior Art Literature]
1. Method and apparatus for producing semiconductor nanopowder by explosion of submerged electric charge (Patent Application No. 10-2008-0126028)
2. Manufacturing method of (Ti, Cr) N nano powder by electric wire explosion method (patent application 10-2010-0114658)

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SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a method and an apparatus for manufacturing nano powder which can manufacture nano powder at low cost.

Another object of the present invention is to provide a method and an apparatus for manufacturing a nano powder which can maintain the durability of the probe wire without breaking when the explosive member explodes in the liquid in the explosion chamber.

According to an aspect of the present invention, there is provided a method of manufacturing a nano powder, comprising the steps of: (a) providing an explosive member in an explosive chamber containing a predetermined height liquid inside; (b) disposing the probe wire from the liquid inside the explosion chamber so that the other end of the probe wire grounded at one end is not energized with the explosion member immersed in the liquid in the explosion chamber; (c) charging an explosion chamber and an open high capacity low voltage capacitor to charge the explosion chamber; (d) charging the explosion chamber by switching on a first relay switch connecting the large-capacity low-voltage capacitor and the explosion chamber; (e) supplying the probe wire to the inside of the explosion chamber so that the explosion member explodes in the liquid of the explosion chamber, thereby energizing the explosion member inside the explosion chamber.

Monitoring the charge state of the high capacity low voltage capacitor between step (c) and step (d); And monitoring the switching state of the first relay switch when it is sensed that the state of charge of the large capacity low voltage capacitor by monitoring is equal to or greater than a predetermined threshold value.

An apparatus for manufacturing a nano powder according to the present invention comprises: an opening and closing type inlet port which is made of an inner and outer closed type in which a liquid of a predetermined height is contained inside and into which an explosive member can be inserted, and an outlet port for draining the explosed powdered liquid Explosion chamber; A large-capacity low-voltage capacitor electrically connected to the explosion chamber and charging the explosion chamber in a charged state; A first relay switch connected between the large-capacity low-voltage capacitor and the explosion chamber, for switching on and charging the explosion chamber before the explosion occurs in the explosion chamber; And a probe wire which is operated to project into and out of the explosion chamber and which is energized in the charged explosion member while the other end thereof is grounded to the inside of the explosion chamber while being grounded.

The nano-powder production apparatus of the present invention controls the operation of protruding and retracting the probe wire to the inside of the explosion chamber, and supplies the probe wire to the inside of the explosion chamber, before the explosion member inside the explosion chamber is energized, And a control unit for switching the switch to the switching-on mode so that the explosion chamber is charged by the large-capacity low-voltage capacitor.

Here, the diameter of the probe wire is preferably larger than the diameter of the explosive member.

The apparatus for manufacturing nanopowder according to the present invention comprises: a charge monitor connected between a large-capacity low-voltage capacitor and a first relay switch to monitor a charged state of a large-capacity low-voltage capacitor; A DC power supply unit for supplying power to the large capacity low voltage capacitor to perform charging; A high-capacity low-voltage capacitor, a DC power supply, and a charge monitor unit. The control unit controls the DC power supply unit to connect the DC power supply unit and the high-capacity low-voltage capacitor to the switching- And a second relay switch for connecting the large-capacity low-voltage capacitor and the charge monitor unit to the switching-on state when the charge state of the capacitor is monitored.

On the other hand, it is preferable that the large-capacity low-voltage capacitor is configured to have a maximum breakdown voltage of DC 400V to 500V.

According to the method and apparatus for producing nanopowder according to the present invention, the following advantages can be obtained.

(1) It is economically advantageous to adopt a large-capacity low-voltage capacitor which has a low voltage (approximately 400 V to 500 V of internal voltage) used for low-cost industrial purposes and can eliminate expensive high-voltage (tens of kV) .

(2) When the diameter of the probe wire is made larger than the diameter of the explosion member, the probe wire is not broken and the durability can be maintained when the explosive member explodes in the liquid of the explosion chamber due to the difference in resistance value.

(3) As the diameter of the probe wire is made larger than the diameter of the explosion member, when the explosive member explodes in the liquid of the explosion chamber due to the difference in resistance value, the probe wire is not broken, Can be prevented.

FIG. 1 is an example of a state in which charging is performed from a DC power supply unit to a large-capacity low-voltage capacitor in a state where the first relay switch is open, according to the present invention.
FIG. 2 is an example of a state in which the charge monitor unit monitors the state of charge of a large-capacity low-voltage capacitor in a state where the first relay switch is open, according to the present invention.
FIG. 3 is an apparatus for manufacturing a nano powder according to the present invention. FIG. 3 is a diagram showing a device for manufacturing a nano powder according to the present invention. In FIG. 3, Fig. 3 is a view showing a state in which the chamber is charged; Fig.
FIG. 4 is an exemplary diagram of a device for manufacturing a nano powder according to the present invention, in which a grounded probe wire is connected to a large-capacity low-voltage capacitor and an explosive member in a charged explosion chamber.
Fig. 5 is an exemplary view showing a state in which the explosive member in the explosion chamber explodes in the state of Fig. 4; Fig.
FIG. 6 is a flow chart illustrating a process of manufacturing a nano powder according to the present invention. FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is an example of a state in which a large-capacity low-voltage capacitor is charged from a DC power supply unit in a state where a first relay switch is opened, and FIG. FIG. 2 is an exemplary diagram showing a state in which the charge monitor unit monitors the state of charge of the high-capacity low-voltage capacitor in a state where the first relay switch is open, as a nano powder production apparatus.

1 to 2, the apparatus for manufacturing a nano powder according to the present invention is capable of manufacturing nano powder at a lower cost than the prior art, and includes an explosion chamber 10, a large-capacity low-voltage capacitor 20, A first relay switch 30, a probe wire 40, a charge monitor unit 50, a DC power supply unit 60, a second relay switch 70, a feeding unit 80, and a control unit .

The explosion chamber 10 is filled with a predetermined height of liquid S in the inside and is preferably closed inside and outside. The explosion chamber 10 may have a charging port 11, a discharge port 12, and a wire guide portion 13.

The charging port 11 may be formed by opening a through hole in the upper part of the explosion chamber 10 and may inject the explosion member M into the liquid S in the explosion chamber 10 through the charging port 11, At this time, it is preferable that the explosive member M is put into a thin and short wire form. In detail, it is preferable that the explosive member M is formed to have a diameter smaller than that of the probe wire 40.

That is, when the grounded probe wire 40 is detonated while being connected to the explosion member M in the explosion chamber 10 charged with the large capacity low voltage capacitor 20, the probe wire 20 is exposed only to a small explosion on the outer surface This is because generation of uneven particles from the probe wire 20 in the explosive powder liquid can be suppressed.

The red outlet 12 is used as a passage for draining the powdered liquid T mixed with the explosion powder into the liquid S in the explosion chamber 10 after the explosion occurs in the explosion chamber 10. Preferably, a through hole is opened in the side wall of the explosion chamber 10 to form an outlet 12.

The wire guide portion 13 is disposed on the upper portion of the explosion chamber 10 so as to penetrate the inside and the outside of the explosion chamber 10 and the probe wire 10 is wound around the explosion chamber 10 And guided in a gripped state.

The large-capacity low-voltage capacitor 20 is electrically connected to the explosion chamber 10 and charges the explosion chamber 10 in a charged state. The large-capacity low-voltage capacitor 20 is preferably configured so that the maximum breakdown voltage has about 400 V to 500 V DC.

Here, since the large-capacity low-voltage capacitor 20 is adopted as a low-voltage (approximately 400 V to 500 V internal voltage) adopted for general industrial use at a low cost, it is possible to eliminate an expensive high voltage (several tens kV) The nano powder can be produced at a cost, which is economically very advantageous.

Since the capacitor is designed to have a high voltage (tens of kV) withstand voltage (for example, 10kV-1uF) in order to prevent sparking during switching of the mechanical discharge switch section connecting the capacitor and the explosion chamber, energy (for example, Q = CV = 10k = 0.01) and the cost of the high-voltage capacitor is very high, which is economically disadvantageous.

However, the large-capacity low-voltage capacitor 20 of the present invention can be used even if the low-voltage, low-voltage (for example, 400 V to 500 V) (Q = CV = 1mx400V = 0.4) efficiency due to the switching is performed because it is electrically connected to the power source and is electrically turned on and off only.

Since the explosion is performed by connecting the grounded probe wire 40 to the explosive member M in the explosion chamber 10 in a state where the first relay switch 30 is first switched on, It is economically advantageous to use the first relay switch 30 at a low cost by eliminating expensive discharge switches and air gap switches used.

The first relay switch 30 is connected between the large capacity low voltage capacitor 20 and the explosion chamber 10 and is switched on before the explosion occurs in the explosion chamber 10 so that the explosion chamber 10 is charged.

Here, the first relay switch 30 is configured as an electronic switch that switches on and off by an electric signal in a state where the large-capacity low-voltage capacitor 20 and the explosion chamber 10 are mechanically connected.

The probe wire 40 is operated to project into and out of the explosion chamber 10 and is energized to the charged explosion member M while the other end of the probe wire 40 is drawn to the inside of the explosion chamber 10 with one end grounded And is configured to detonate the explosive member (M).

At this time, it is preferable that the probe wire 40 is formed in the form of a wire thicker than the explosive member M. That is, when the grounded probe wire 40 explodes while being connected to the explosive member M in the explosion chamber 10 charged with the large capacity low voltage capacitor 20, the degree of corrosion of the probe wire 20 on the outer surface only The generation of uneven coarse particles from the probe wire 20 in the explosive powder liquid can be suppressed.

In detail, when the diameter of the probe wire 40 is larger than the diameter of the explosion member M, the resistance value of the explosion member M at the time of explosion is relatively larger than the resistance value of the probe wire 40 Therefore, only the explosive member M explodes in powder form.

The charge monitor unit 50 is connected between the large-capacity low-voltage capacitor 20 and the first relay switch 30 to monitor the charge state of the large-capacity low-voltage capacitor 20. At this time, the second relay switch 70 connects the large-capacity low-voltage capacitor 20 and the charge monitor unit 50 to the switching-on state.

The DC power supply unit 60 supplies DC power to the large capacity low voltage capacitor 20 to perform charging. In the present invention, since the large-capacity low-voltage capacitor 20 is adopted for a low voltage of about 400V to 500V, the DC power supply unit 60 can be adopted as a low-cost product that produces a low-voltage DC power, .

On the other hand, conventionally, since the capacitor is employed for a high voltage of several tens kV, the power supply unit has to be adopted as a high-priced product which produces a DC power of several tens kV.

The second relay switch 70 is connected to a node between the large capacity low voltage capacitor 20, the DC power supply unit 60 and the charge monitor unit 50 and is connected to the charging terminal of the large capacity low voltage capacitor 20 through the DC power supply unit 60 The DC power supply unit 60 and the large-capacity low-voltage capacitor 20 are switched on and the charge monitor unit 50 monitors the charge state of the large-capacity low-voltage capacitor 20 and the charge monitor unit 50 ) To the switching-on.

The feeding section 80 is disposed outside the explosion chamber 10 and is preferably disposed at a vertical upper portion of the explosion chamber 10 to rotate the probe wire 40 in the explosion chamber 10 in a clockwise or counter- To and from inside and outside.

The control unit controls the movement of the probe wire 40 into and out of the explosion chamber 10 and supplies the probe wire 40 to the inside of the explosion chamber 10, The first relay switch 30 is switched to the switching-on state in advance so that the explosion chamber 10 is charged by the large-capacity low-voltage capacitor 10 before the explosion member M is energized.

FIG. 3 is an apparatus for manufacturing a nano powder according to the present invention. FIG. 3 is a diagram showing a device for manufacturing a nano powder according to the present invention. In FIG. 3, 4 is a view showing an example of a device for manufacturing a nano powder according to the present invention in which a grounded probe wire is connected to a large-capacity low-voltage capacitor and an explosive member charged in an explosion chamber. FIG. [Fig. 5] is an example of a state in which the explosive member in the explosion chamber is exploded in the state of [Fig. 4].

The first relay switch 30 is switched on when the charging of the large capacity low voltage capacitor 20 is completed as a result of the monitoring of the charge monitor unit 50 as shown in FIG. 3 and the large capacity low voltage capacitor 20 and the explosion chamber M .

4, the grounded probe wire 40 is connected to the explosive member M in the explosion chamber 10 to detonate the explosive member M so that the explosion member M is blown into the explosion chamber 10 as shown in FIG. A powdery liquid T is generated. The powdery liquid T thus generated is drained to the outside through the redox outlet 13 formed in the side wall of the explosion chamber 10.

FIG. 6 is a flowchart illustrating a process for producing a nano powder according to the present invention. The process for producing the nano powder according to the present invention will be described in detail with reference to FIG.

S110: First, as shown in FIG. 1, a wire-shaped explosive member M cut into a predetermined length is inserted into the explosion chamber 10 through the inlet 11 formed in the explosion chamber 10, 10 so as to be immersed in the liquid S held at a predetermined height.

S120: The probe wire 40 is connected to the liquid S in the explosion chamber 10 so that the probe wire 40 with one end grounded is not energized with the explosion member M immersed in the liquid S in the explosion chamber 10 .

S130: Next, the explosion chamber 10 for charging the explosion chamber 10 by supplying power to the explosion chamber 10 and the large capacity low voltage capacitor 20 in the open state are connected to the DC power supply unit 60, do.

S140: As shown in FIG. 2, the second relay switch 70 monitors the charging state of the large capacity low voltage capacitor 20 by switching on the charge monitor unit 50 and the large capacity low voltage capacitor 20.

S150 and S160: When the charging of the large-capacity low-voltage capacitor 20 is completed, the first relay switch 30 is switched on in advance to charge the explosion chamber 10 through the large-capacity low-voltage capacitor 20 as shown in FIG. Here, the grounded probe wire 40 is kept open so as not to be energized with the explosion chamber 10.

S170: Then, the probe wire 40 is drawn into the explosion chamber 10 so as to be energized to the explosive member M inside the explosion chamber 10 and is contacted with the explosive member M, The explosive member M is exploded.

10: Explosion chamber
11:
12: enemy exit
13:
20: High Capacity Low Voltage Capacitor
30: first relay switch
40: probe wire
50: Charge monitor section
60: DC power supply
70: second relay switch
80: Feeding part
L: conductor line
M: Explosion member
S: liquid
T: Powdered liquid

Claims (7)

Control of the explosion chamber 10, the large-capacity low-voltage capacitor 20, the DC power supply 60, the first relay switch 30, the probe wire 40, the charge monitor unit 50 and the second relay switch 70 A method for producing a nano powder,
(a) providing an explosive member in the explosion chamber containing a predetermined height of liquid inside;
(b) disengaging the other end of the probe wire grounded at one end from the liquid inside the explosion chamber to block energization to the explosive member immersed in the liquid in the explosion chamber;
(c) maintaining the first relay switch maintaining a mechanically connected state between the large-capacity low-voltage capacitor and the explosion chamber and performing an electrical switching on / off operation of the large-capacity low-voltage capacitor and the explosion chamber, Charging the DC power supply from the DC power supply to the high capacity low voltage capacitor in an electrically opened state with the explosion chamber;
(d) monitoring the charge state of the high-capacity low-voltage capacitor by the charge monitor unit;
(e) switching the first relay switch to a switching-on state by detecting that the charge state of the large-capacity low-voltage capacitor by monitoring is equal to or greater than a predetermined threshold value, and charging the explosion chamber to the large-capacity low-voltage capacitor in advance;
(f) supplying the probe wire to the inside of the explosion chamber so that the explosion member explodes in the liquid of the explosion chamber, thereby energizing the probe wire and the explosion member inside the explosion chamber;
Wherein the nanoparticle powder is a nanoparticle.
delete (10) having an inlet port (11) of a closed type formed inside and outside of which a liquid of a predetermined height is contained in the inside and an explosive member can be inserted into the inside thereof, and an outlet port (12) );
A high capacity low voltage capacitor (20) for supplying DC power to the explosion chamber;
A DC power supply unit 60 for supplying power to the large capacity low voltage capacitor to perform charging;
Voltage low-voltage capacitor and the explosion chamber while maintaining a mechanical connection state between the high-capacity low-voltage capacitor and the explosion chamber and performing an electrical switching on / off operation of the high-capacity low-voltage capacitor and the explosion chamber, A first relay switch (30);
And the other end is protruded and retracted toward the inside of the explosion chamber with one end being grounded to detonate the explosion member, and when the explosion member is charged to the large capacity low voltage capacitor according to the switching on operation of the first relay switch A probe wire (40) electrically connected to the explosion member while being drawn into the explosion chamber;
A charge monitor unit (50) connected between the large-capacity low-voltage capacitor and the first relay switch to monitor a charge state of the large-capacity low-voltage capacitor;
Wherein the control unit controls the operation of the probe wire to move in and out of the explosion chamber so as to shut off the conduction between the probe wire and the explosion member and to switch the first relay switch in advance before energizing the probe wire and the explosion member, A control unit for controlling the operation of the probe wire to be drawn into the explosion chamber after the explosion chamber is charged by the high-capacity low-voltage capacitor, thereby energizing the probe wire and the explosion member;
Wherein the DC power supply unit is connected to a node connecting the DC power supply unit, the large capacity low voltage capacitor, and the charge monitor unit, and is operated under the control of the control unit. When the large capacity low voltage capacitor is charged through the DC power supply unit, Voltage capacitor is maintained in a switching-on state and the connection between the large-capacity low-voltage capacitor and the first relay switch is maintained in a switching-off state, and when the charge monitor unit monitors the charge state of the large-capacity low-voltage capacitor, A second relay switch (70) for maintaining the connection of the large capacity low voltage capacitor in a switching off state and for maintaining the connection between the large capacity low voltage capacitor and the first relay switch in a switching on state;
Wherein the nanostructured powder is a nanostructured powder.
delete The method of claim 3,
Wherein the diameter of the probe wire is larger than the diameter of the explosive member.
delete The method of claim 5,
Wherein the large-capacity low-voltage capacitor is configured to have a maximum breakdown voltage of DC 400V to 500V.

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