Equipment for preparing metal nano powder by spiral wire feed counter-current electrical explosion method

[0021] As attached figure 1 , 2 As shown, this equipment includes a host device I, a collection device II, a vacuum device III, an air delivery device IV, a water cooling device V, and a wire feeding mechanism VI. The host device I is set on the bracket 26, and is connected in series with the first collection bin 4, the second collection bin 8, the third collection bin 9, the fourth collection bin 11, and the high-pressure vacuum fan 14 through pipelines; the collection device II includes the first Collection bin 4, second collection bin 8, third collection bin 9, fourth collection bin 11, packing box 12; vacuum device III includes motor 16, vacuum pump 17, vacuum meter seat 19; air conveying device IV includes motor 13, high voltage Vacuum fan 14. The air inlet of the high-pressure vacuum fan 14 is connected through the pipeline 15 and the air outlet 10 of the fourth collection bin 11 through the flapper valve 7, and the air outlet is connected through the water cooler 5, the pipeline 3, the flapper valve 2, and the air inlet pipe 1. Connect with the host device 1. The water cooling device V is located under the bracket 18 and is composed of a cooling pump 24, a pipeline 25, a splitter 18, and a pipeline, and is connected to the host device I, the first collection bin 4, the second collection bin 8, and the third collection bin through the pipeline. 9. The fourth collection bin 11 is connected to cool these devices by circulating water.

[0022] As attached image 3 As shown, the host device I includes a wiring chamber 27, an insulation chamber 28, an insulator 29, a plasma switch 30, an exhaust valve 31, a plasma switch 32, an insulator 33, an explosion chamber 21, a pole target 34, a tungsten electrode 35, and a wire feeding tube 36 , The raw material warehouse 37, the exhaust port 22, the metal wire 38, the air filter 39; the wiring room 27 on the left side of the host device I is connected with the insulating room 28, and the insulating room 28 is connected with the plasma chamber through the insulator 29. Plasma switches 30 and 32, the upper part has an exhaust valve 31, and the lower part has an air filter 39; the explosion chamber 21 is connected to the plasma chamber through an insulator 33, and the pole target 34 is located in the middle of the insulator 33 and connected to the plasma switch 32; the tungsten electrode 35 is vertical Placed in the explosion chamber 21, the wire feeding tube 36 is connected to the raw material bin 37, and the raw material bin 37 is connected to the explosion chamber 21 and is located on the right side of the host device I. The raw material bin 37 has a wire feeding mechanism VI. The host device I is a double-layer water-cooled structure, and the host room is cooled by circulating cooling water to control the temperature rise of the equipment.

[0023] As attached Figure 4 As shown, the main engine air inlet, slag removal and primary collection device include the main engine air inlet 20, filter screen 51, waste chamber 23, exhaust outlet 50, pipeline 49, flapper valve 48, air inlet 40, first collector Warehouse 4, air outlet 41, filter screen 42, wheel 43, gear 44, hand wheel 45, rotating shaft 46, scraper 47. The air inlet 20 of the host is located on the lower side of the air inlet pipe 1, and the air outlet 22 is located on the lower side of the explosion chamber, and the lower part is connected with the filter 51 and the waste chamber 23; the host device 1 passes the air outlet 50, the pipeline 49, and the flap valve 48. The air inlet 40 is connected to the first collection bin 4. The air inlet 40 is located on the upper side of the first collecting bin 4, the air outlet 41 is located on the top of the first collecting bin 4, and the filter 42 is located on the bottom side of the air outlet 41. There are a wheel 43 and a gear 44 underneath; the gear 44 is connected to the hand wheel 45 , Rotating the hand wheel 45 can drive the gear 44 and drive the wheel 43 to rotate. The scraper mounted on the wheel 43 removes the powder adsorbed on the filter screen 42. When the wheel 43 rotates, the scraper 47 is driven by the shaft 46 to rotate. , Can remove the powder absorbed in the collection bin.

[0024] As attached Figure 5 , 6 As shown, the wire feeding mechanism is located in the raw material warehouse 37. Between the two brackets 60, there are a wire feeding tube bracket 52, an S-shaped wire feeding tube 53, a wire feeding tube bracket 54, a pulley 55, a wire feeding drum 56, and a belt 57. , Pulley 58, motor 59, roller 61, motor 62. The wire feeder 56 is located on the right side of the bracket 60. The S-shaped wire feed tube 53 is supported by the wire feeder brackets 52 and 54 and is connected to the pulley 55. The metal wire 38 is passed through the wire feeder 56, the S-shaped wire feed tube 53, the roller 61, Enter the wire feeding tube 36. The motor 59 and the pulley 58 are directly connected, and the pulley 55 and the S-shaped wire feeding tube 53 are driven to rotate through the belt 57 to realize the straightening of the wire 38. The motor 62 drives the roller 61 to rotate, and sends the wire 38 sandwiched between the two rollers into the explosion chamber 21 through the wire feeding tube 36. Adjusting the speed of the motor 62 can adjust the speed of the roller 61, thereby adjusting the wire feeding speed and controlling the explosion frequency.

[0025]The working process of the equipment is as follows: the metal wire 38 enters the explosion chamber 21 through the wire feeding tube 36 after being straightened by the wire feeding mechanism, and short-circuits and explodes between the pole target 34 and the tungsten electrode 35. Under the action of high pressure and high temperature, it is in a molten state and evaporates into nano-scale metal smoke. The inert working gas enters from the air inlet 20 of the upper host of the explosion chamber 21, and drives the metal smoke to be filtered from the air outlet 22 on the lower side of the explosion chamber through the filter 51 The large-particle waste material is removed, and then it enters the first collection bin 4, the second collection bin 8, the third collection bin 9, and the fourth collection bin 11 in sequence, and is gradually deposited in the four collection bins. The inert working gas separated by the gas mist is cooled by the water cooler 5, returned to the high-pressure vacuum fan 14, and re-entered into the electric explosion chamber after being pressurized by the high-pressure vacuum fan, and the working gas is recycled for use.

[0026] The bottom of the first collection bin 4, the second collection bin 8, the third collection bin 9, and the fourth collection bin 11 has a packaging box 12, and the metal nano powder deposited in several collection bins can enter the packaging box through the valve and be packed in Vacuum packaging in the box.

[0027] The equipment is strictly airtight, and the entire equipment must be evacuated by a vacuum device before work, and then filled with inert working gas. There are multiple flapper valves on the equipment pipeline, which are used to open and disconnect the pipeline according to work needs.

[0028] This equipment is equipped with a water cooling device V, which cools the host device and the collection bin through circulating water. The host device and the collection bin have a double-layer structure. At the same time, the water cooling device cools the circulating inert working gas through the water cooler.

[0029] The electrical system of this equipment is composed of power supply, high-energy capacitors, electrical control and detection devices, etc. The power supply part uses high-speed silicon controlled rectifier to obtain high-voltage direct current. The switch circuit converts the high-voltage direct current into high-frequency pulsating direct current, which is stored by a capacitor; the control system is automatically controlled by a programmable controller. See the electrical schematic diagram of the electric explosive power supply Figure 7 , See the electronic control process Figure 8.