Ultrasonic vibration secondary atomization device for centrifugal powder making equipment

Abstract

The utility model discloses an ultrasonic vibration secondary atomization device for centrifugal powder preparation equipment, belongs to the technical field of metal powder preparation, and solves the problems that ultrasonic atomization equipment for preparing metal powder in the prior art is low in powder preparation efficiency and low in capacity, and the effect of dispersing and crushing molten metal liquid drops is very weak. The device is characterized in that the bottom end of the conical cylinder is outwards provided with a stepped folded edge perpendicular to the bottom face of the conical cylinder, a plurality of ultrasonic vibrators are installed on the outer wall of the conical cylinder from top to bottom in the circumferential direction to form an ultrasonic vibrator cluster, and cooling circulation oil with the insulating property is injected into the installation space of the ultrasonic vibrators. The ultrasonic atomization device has the beneficial effects that heat energy generated under high-frequency vibration of the ultrasonic vibrator cluster plays a role in heating and vibrating the inner wall of the conical barrel, and fine metal liquid drops which are centrifugally atomized directly impact the vibrating inner wall of the conical barrel to realize secondary atomization, so that the secondary atomization effect is greatly improved, and the service life of the ultrasonic atomization device is prolonged. And the cooling circulating oil can play a role in cooling and protecting the ultrasonic vibrator, so that the ultrasonic powder atomization device has relatively high production efficiency and capacity, is suitable for preparing large-batch superfine metal powder, and is simple in structure, good in sealing performance and convenient to disassemble, assemble and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal powder preparation, in particular to an ultrasonic vibration secondary atomization device used for centrifugal powder making equipment. Background Art

[0002] In the prior art, the utility model with application number CN202223562266.4 discloses an ultrasonic atomization device that can continuously prepare metal powder. The utility model includes a frame, an ultrasonic powder making component, and an automatic feeding system; the frame is provided with an equipment function bin; the equipment function bin is installed with a water oxygen content stabilization system, an operating software, and an ultrasonic driving power supply; the ultrasonic powder making component is installed on the side of the frame, and the automatic feeding system is installed on the upper end of the frame; the utility model adopts an ultrasonic atomization method, and only needs to drip the molten metal onto the ultrasonic device to prepare metal powder. Different frequencies of ultrasonic devices are required for metal powders of different particles. At the same time, the required size of the ultrasonic device is small, and the required amount of nitrogen is small. However, the powder making efficiency of the utility model is low, the production capacity is small, and it is only suitable for the preparation of small batches of metal powders. Moreover, this powder making is only atomized into powder once, and the particle size can only reach micron level powder making.

[0003] The invention with application number CN201910609101.1 discloses a composite gas atomization powder making equipment, which includes a feeding system, a smelting system, an atomization system, a circulating gas system and an ultrasonic generator connected in sequence; an ultrasonic generator is installed on the inner wall of the atomization chamber, and the ultrasonic waves emitted by it can disperse and break the molten metal droplets into finer powders. According to the invention specification and its drawings, the ultrasonic generator described in the invention is arranged on the inner wall of the atomization chamber close to the atomization spray disc, and the ultrasonic waves emitted by the ultrasonic generator can realize the synergistic effect of ultrasonic energy field coupling gas atomization, and further disperse and break the molten metal droplets. In other words, the ultrasonic generator of the invention is actually arranged on the inner wall of the atomization chamber far away from the atomization spray disc, far away from the metal droplets, and the synergistic effect of ultrasonic energy field coupling gas atomization is to disperse and break the molten metal droplets, which still belongs to the category of primary atomization, so the effect of further refining the metal droplets is very weak, and the atomization efficiency is low. Summary of the invention

[0004] The problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide an ultrasonic vibration secondary atomization device for centrifugal powder making equipment that is suitable for the preparation of large quantities of ultrafine metal powders, directly contacts with metal droplets, and performs secondary atomization on the metal droplets after primary centrifugal atomization, so as to achieve further metal droplet crushing and refinement effect and improve atomization efficiency.

[0005] The technical solution adopted by the utility model includes a conical cylinder, a stepped folded edge perpendicular to the bottom surface of the conical cylinder is provided outwardly at the bottom end of the conical cylinder, a dust cover is mounted on the outside of the conical cylinder, an ultrasonic vibrator installation space is formed between the conical cylinder and the dust cover, an ultrasonic vibrator is installed on the outer wall of the conical cylinder, a first sealing ring is installed at the fixed connection between the lower end of the dust cover and the stepped folded edge of the conical cylinder, and a second sealing ring is installed at the connection between the upper end of the dust cover and the vertical protrusion of the conical cylinder.

[0006] One to three layers of ultrasonic vibrators are installed circumferentially from top to bottom on the outer wall of the conical cylinder, and each layer has a plurality of ultrasonic vibrators, the plurality of ultrasonic vibrators constitute an ultrasonic vibrator cluster, and the plurality of ultrasonic vibrators in each layer are connected in series by ring power lines.

[0007] The dust cover is an integral dust cover, and three wire inlet holes are arranged on the top of the dust cover, and the three wire inlet holes are respectively a first ultrasonic generator wire inlet hole, a second ultrasonic generator wire inlet hole, and a third ultrasonic generator wire inlet hole.

[0008] An oil inlet and an oil outlet are arranged on the dust cover, and cooling circulation oil with insulating properties is injected into the ultrasonic vibrator installation space.

[0009] An upward vertical protrusion is provided at the top of the conical cylinder, a flange is installed at the upper end of the conical cylinder, the lower end of the dust cover is fixedly connected to the stepped folded edge of the conical cylinder by a second screw, and the flange is connected to the vertical protrusion of the conical cylinder by a first screw.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model forms an ultrasonic vibrator installation space between the conical cylinder and the dust cover, and a plurality of ultrasonic vibrators are installed on the outer wall of the conical cylinder to form an ultrasonic vibrator cluster, which can provide strong energy density and realize secondary crushing of fine micron-level droplets to obtain ultrafine particles. On the basis of centrifugal powder making, metal droplets that have been centrifugally atomized into smaller particle sizes are thrown onto the inner wall of the conical cylinder of the utility model, and the heat energy generated by the high-frequency vibration of the ultrasonic vibrator cluster heats and vibrates the inner wall of the conical cylinder, and the fine metal droplets that have been centrifugally atomized directly hit the inner wall of the vibrating conical cylinder to realize secondary atomization, thereby improving the effect of further crushing and refining the metal droplets and the atomization efficiency.

[0012] (2) The utility model has an integral dust cover mounted on the outside of the conical cylinder, a first sealing ring is installed at the fixed connection between the lower end of the integral dust cover and the stepped folded edge of the conical cylinder, and a second sealing ring is installed at the connection between the upper end of the integral dust cover and the vertical protrusion of the conical cylinder. Therefore, the utility model has a simple structure, good sealing performance, and is convenient for disassembly and maintenance.

[0013] (3) By injecting cooling circulating oil with insulating properties into the installation space of the ultrasonic vibrator, the ultrasonic vibrator can be cooled and protected, and a good working environment of the ultrasonic vibrator can be maintained. Therefore, the production efficiency and capacity are higher, the production cost can be greatly reduced and energy can be saved, and the method is suitable for the preparation of large quantities of ultrafine metal powders. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of the utility model;

[0015] Figure 2 yes Figure 1 A top view of

[0016] Figure 3 yes Figure 2 AA section enlarged view,

[0017] Figure 4 This is the front view of the hidden dust cover of the utility model.

[0018] Figure 5 yes Figure 4 Top view of the .

[0019] In the figure:

[0020] 1. Conical cylinder,

[0021] 1-1. Stepped hem, 1-2. Vertical bulge,

[0022] 2. Dust cover, 3. Ultrasonic vibrator, 4. Power cord,

[0023] 5-1. First ultrasonic generator inlet hole,

[0024] 5-2. Second ultrasonic generator inlet hole,

[0025] 5-3. The third ultrasonic generator inlet hole,

[0026] 6. First screw, 7. Connection hole, 8. Flange,

[0027] 9. Second screw, 10. Oil outlet, 11. Oil inlet,

[0028] 12. First sealing ring, 13. Second sealing ring. DETAILED DESCRIPTION

[0029] like Figure 1 to Figure 5 As shown, the technical solution adopted by the utility model includes a conical cylinder 1, a stepped folded edge 1-1 perpendicular to the bottom surface of the conical cylinder 1 is provided outwardly at the bottom end of the conical cylinder 1, an upward vertical protrusion 1-2 is provided at the top of the conical cylinder 1, an integral dust cover 2 is set on the outside of the conical cylinder 1, the lower end of the dust cover 2 is fixedly connected to the stepped folded edge 1-1 of the conical cylinder 1 by a second screw 9, a flange 8 is installed at the upper end of the conical cylinder 1, the flange 8 is connected to the vertical protrusion 1-2 of the conical cylinder 1 by a first screw 6, an ultrasonic vibrator installation space is formed between the conical cylinder 1 and the dust cover 2, an ultrasonic vibrator 3 is installed on the outer wall of the conical cylinder 1, and further, 1 to 3 layers of ultrasonic vibrators 3 are installed circumferentially from top to bottom on the outer wall of the conical cylinder 1, and each layer has a plurality of ultrasonic vibrators 3, and the plurality of ultrasonic vibrators 3 constitutes an ultrasonic vibrator cluster, and multiple ultrasonic vibrators 3 in each layer are connected in series by annular power lines 4 respectively. Three power line inlet holes are arranged on the upper surface of the overall dust cover 2, and the three power line inlet holes are respectively a first ultrasonic generator inlet hole 5-1, a second ultrasonic generator inlet hole 5-2, and a third ultrasonic generator inlet hole 5-3. Multiple ultrasonic vibrators 3 are connected to the ultrasonic generator circuit through the three power line inlet holes and the three annular power lines 4; a connecting hole 7 is arranged on the flange 8, and an oil inlet 11 and an oil outlet 10 are arranged on the dust cover 2. Cooling circulating oil with insulating properties is injected into the ultrasonic vibrator installation space, and a first sealing ring 12 is installed at the fixed connection between the lower end of the dust cover 2 and the stepped folded edge 1-1 of the conical cylinder 1, and a second sealing ring 13 is installed at the connection between the upper end of the dust cover 2 and the vertical protrusion 1 of the conical cylinder 1.

[0030] When in use, the flange 8 is fixedly connected to the flange of the centrifugal powder making equipment through the connecting hole 7 on the flange 8, the oil inlet pipeline is installed on the oil inlet 11-1, and the oil outlet pipeline is installed on the oil outlet 11-2. By injecting cooling circulating oil with insulating properties into the ultrasonic vibrator installation space 10, the ultrasonic vibrator can be cooled. The centrifugal force generated by the high-speed rotation of the centrifugal spindle throws the metal liquid in the centrifugal crucible out and atomizes it into fine metal droplets. The metal droplets directly hit the inner wall of the vibrating conical cylinder 1 and are crushed by the high-frequency oscillation of the conical cylinder to achieve secondary atomization, thereby achieving the purpose of further refining the metal droplets. The further refined fine metal droplets are condensed in an inert gas atmosphere to obtain ultrafine metal powder.

Claims

1. An ultrasonic vibration secondary atomization device for centrifugal powder making equipment, comprising a conical cylinder (1), characterized in that: A stepped folded edge (1-1) perpendicular to the bottom surface of the conical cylinder (1) is provided outwardly at the bottom end of the conical cylinder (1); a dust cover (2) is mounted on the outside of the conical cylinder (1); an ultrasonic vibrator installation space is formed between the conical cylinder (1) and the dust cover (2); an ultrasonic vibrator (3) is installed on the outer wall of the conical cylinder (1); a first sealing ring (12) is installed at the fixed connection between the lower end of the dust cover (2) and the stepped folded edge (1-1) of the conical cylinder (1); and a second sealing ring (13) is installed at the connection between the upper end of the dust cover (2) and the vertical protrusion (1-2) of the conical cylinder (1).

2. The ultrasonic vibration secondary atomization device for centrifugal powder making equipment according to claim 1, characterized in that: One to three layers of ultrasonic vibrators (3) are installed circumferentially from top to bottom on the outer wall of the conical cylinder (1), and each layer has a plurality of ultrasonic vibrators (3), the plurality of ultrasonic vibrators (3) forming an ultrasonic vibrator cluster, and the plurality of ultrasonic vibrators (3) in each layer are connected in series by means of ring-shaped power lines (4).

3. The ultrasonic vibration secondary atomization device for centrifugal powder making equipment according to claim 1 or 2, characterized in that: The dust cover (2) is an integral dust cover, and three power line inlet holes are arranged on the top of the dust cover (2), and the three power line inlet holes are respectively a first ultrasonic generator inlet hole (5-1), a second ultrasonic generator inlet hole (5-2), and a third ultrasonic generator inlet hole (5-3).

4. The ultrasonic vibration secondary atomization device for centrifugal powder making equipment according to claim 1 or 2, characterized in that: An oil inlet (11) and an oil outlet (10) are provided on the dust cover (2), and cooling circulation oil with insulating properties is injected into the ultrasonic vibrator installation space.

5. The ultrasonic vibration secondary atomization device for centrifugal powder making equipment according to claim 1 or 2, characterized in that: An upward vertical protrusion (1-2) is provided at the top of the conical cylinder (1), a flange (8) is installed at the upper end of the conical cylinder (1), and a connecting hole (7) is provided on the flange (8), the lower end of the dust cover (2) is fixedly connected to the stepped folded edge (1-1) of the conical cylinder (1) by a second screw (9), and the flange (8) is connected to the vertical protrusion (1-2) of the conical cylinder (1) by a first screw (6).

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