Plasma atomization powder manufacturing equipment suitable for high-melting-point metal

Abstract

The utility model discloses a plasma atomization pulverization device suitable for high-melting-point metal, which comprises a bearing frame and a high-temperature box, the high-temperature box is arranged at the top end of the bearing frame, a feed port is arranged at the top end of the high-temperature box, a discharge pipe is arranged at the bottom end of the high-temperature box, a movable pipe is arranged in the discharge pipe, and the movable pipe is connected with the high-temperature box. A limiting ring is installed at the top end of the movable pipe, the movable pipe is movably connected with the discharging pipe through the limiting ring, a driving motor is installed on the outer wall of the discharging pipe, a driving shaft is installed at the output end of the driving motor, the surface of the driving shaft is sleeved with a gear, and the surface, on one side of the gear, of the movable pipe is sleeved with a gear ring; and the gear is meshed with the gear ring. According to the device, helium is conveniently sprayed in a reciprocating swing mode to conduct gas extraction cooling and rotate to adjust the output position of metal powder, the contact uniformity of the helium and metal steam is improved, and the metal powder generation effect and the output flexibility are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to atomization powder equipment technical field, concretely to a kind of plasma atomization powder equipment suitable for high melting point metal. BACKGROUND

[0002] In recent years, the additive manufacturing method such as "3D printing" has attracted much attention. It can directly produce metal products without the need for forging, turning, milling, planing and grinding processes, greatly reducing energy consumption and saving materials. 3D printing requires the use of metal powder to complete the printing work. The production and manufacturing methods of metal powder are various, and the better manufacturing method is plasma atomization powdering. Plasma atomization powdering is a method for preparing ultrafine powder by plasma high-temperature evaporation and rapid cooling technology. The specific process is to inject solid particles into inert gas plasma, which is completely evaporated into vapor under the action of plasma high temperature, and then rapidly cooled by gas quenching technology to form ultrafine powder. The saturated vapor rapidly condenses, nucleates and grows to form ultrafine powder. The traditional plasma atomization powdering equipment can only be transported from a single direction after the production of metal powder, which is not convenient for outputting metal powder from other positions. In order to improve this situation, a plasma atomization powdering equipment suitable for high melting point metal is proposed.

[0003] As disclosed in the authorized announcement No. CN209288280U, a plasma atomization powdering equipment suitable for high melting point metal includes a feeding device, a vertical melting chamber, an atomization chamber, a powder collecting device, a vacuum pumping system and a cooling gas supply device. The inlet end of the flow guide pipe is communicated with the liquid outlet hole at the bottom of the melting furnace, and the outlet end is located in the atomization chamber and directly above the plasma convergence zone of the plasma torch assembly. The flow guide pipe is provided with a heating and heat preservation device outside. The vertical melting cylinder is also provided with a plug rod for plugging the liquid outlet hole and a lifting drive device for driving the plug rod to lift.

[0004] Although the plasma atomization powdering equipment suitable for high melting point metal has the advantages of simple structure, heating and heat preservation of metal melt during high melting point metal atomization powdering, high powdering efficiency, efficient cooling of liquid droplets after plasma atomization by the cooling assembly, improved uniformity and stability of metal atomized powder, and high separation efficiency of micro-particle metal powder by the high-speed turbine separator, it does not solve the problem that the existing atomization powdering equipment is not convenient for reciprocating oscillation type spraying of helium gas for gas extraction cooling and rotation adjustment of the output position of metal powder, which affects the effect of metal powder generation and the flexibility of output.

[0005] However, it does not solve the problem that the existing atomization powdering equipment is not convenient for reciprocating oscillation type spraying of helium gas for gas extraction cooling and rotation adjustment of the output position of metal powder, which affects the effect of metal powder generation and the flexibility of output. UTILITY MODEL CONTENTS

[0006] The purpose of this invention is to provide a plasma atomization powder making device suitable for high melting point metals, in order to solve the problems mentioned in the background art, such as the inconvenience of reciprocating oscillating spraying of helium for gas extraction cooling and rotation adjustment of the output position of metal powder, which is not conducive to increasing the uniformity of contact between helium and metal vapor, thus affecting the effect of metal powder generation and the flexibility of output.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a plasma atomization powder making device suitable for high melting point metals, comprising a support frame and a high-temperature chamber. The high-temperature chamber is installed at the top of the support frame, and a feed inlet is installed at the top of the high-temperature chamber. A discharge pipe is installed at the bottom of the high-temperature chamber. A movable pipe is provided inside the discharge pipe. A limit ring is installed at the top of the movable pipe, and the movable pipe is movably connected to the discharge pipe through the limit ring. A drive motor is installed on the outer wall of the discharge pipe. A drive shaft is installed at the output end of the drive motor, and a gear is fitted on the surface of the drive shaft. A toothed ring is fitted on the surface of the movable pipe on one side of the gear, and the gear and the toothed ring mesh with each other. A screw conveyor is installed at the bottom of the movable pipe.

[0008] Preferably, an electric push rod is provided on the outer wall of the high-temperature chamber, and a push arm is installed at the output end of the electric push rod.

[0009] Preferably, a slip ring is movably mounted on the end of the push arm away from the electric push rod, and the slip ring is slidably connected to the high-temperature chamber.

[0010] Preferably, the outer wall of the slip ring is provided with multiple sets of long connecting arms at equal intervals, and each long connecting arm is provided with a linkage shaft at one end near the slip ring, and the long connecting arm is movably connected to the slip ring through the linkage shaft.

[0011] Preferably, each of the long connecting arms is provided with an adjusting arm at the end away from the slip ring, and each of the adjusting arms is provided with a hinge shaft at the end near the long connecting arm, and the adjusting arm is movably connected to the long connecting arm through the hinge shaft.

[0012] Preferably, each end of the adjusting arm away from the long connecting arm is provided with an air outlet pipe, and the air outlet pipe is fixedly connected to the adjusting arm.

[0013] Preferably, a sleeve is provided on the side wall of the high-temperature chamber on one side of the adjusting arm, and the sleeve extends into the interior of the high-temperature chamber, and the air outlet pipe is movably connected to the sleeve and extends into the interior of the high-temperature chamber.

[0014] Preferably, one end of each air outlet pipe is provided with a flexible hose, and the flexible hose is fixedly connected to the air outlet pipe.

[0015] Compared with the prior art, the atomizing powder preparation equipment has the advantages that: the atomizing powder preparation equipment not only realizes the reciprocating swing type helium gas spraying for gas extraction cooling and rotation adjustment of the output position of the metal powder, increases the uniformity of the contact between the helium gas and the metal vapor, but also improves the effect of metal powder generation and the flexibility of output.

[0016] (1) The metal wire is put into the inside of the high-temperature box through the feeding port, and the inert gas is filled, the feeding port is closed, then the inert gas is heated by the high-temperature box, under the action of the high-temperature inert gas plasma, the metal wire is evaporated into vapor, because the density of the vapor is small, so the vapor will float to the upper part of the high-temperature box, at this time, the external helium gas source is connected with the flexible hose through the pipeline, the helium gas is pumped into the inside of the air outlet pipe through the flexible hose by the air pump and is sprayed into the inside of the high-temperature box from the air outlet pipe, under the gas extraction cooling effect of the helium gas, the metal in the vapor state is rapidly cooled, so that the saturated metal vapor is rapidly condensed, nucleated and grown to form superfine powder, when the metal vapor needs to be fully gas extraction cooled, the push arm is moved by the electric push rod, the sliding ring is slid on the outer wall of the high-temperature box by the push arm, the long connecting arm is rotated by the sliding ring through the linkage shaft, the adjusting arm is rotated by the long connecting arm through the hinged shaft, the air outlet pipe is rotated in the sleeve by the adjusting arm, because the air outlet pipe is designed to be curved, so the blowing angle can be adjusted, under the repeated action of the electric push rod, the blowing direction can be reciprocating swing, so that the contact between the helium gas and the metal vapor is more uniform, the effect of metal powder generation is improved, the reciprocating swing type helium gas spraying for gas extraction cooling is realized, the uniformity of the contact between the helium gas and the metal vapor is increased, and the effect of metal powder generation is improved.

[0017] (2) After the metal powder is generated, it falls to the bottom of the high-temperature box and is accumulated under the action of gravity, when the metal powder needs to be output, the valve at the bottom of the high-temperature box is opened, the metal powder enters the inside of the screw conveyor through the high-temperature box, the discharge pipe and the movable pipe, and is conveyed out by the screw conveyor, when the output position needs to be adjusted, the gear is rotated by the driving motor through the driving shaft, the movable pipe is rotated by the gear through the gear ring, the screw conveyor is rotated by the movable pipe, so that the output position of the screw conveyor is rotated, the metal powder is conveniently output from different positions, and the flexibility of metal powder output is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0019] Figure 2 It is a three-dimensional perspective structure schematic view of the high-temperature box of the utility model;

[0020] Figure 3 It is a three-dimensional perspective structure schematic view of the discharge pipe of the utility model;

[0021] Figure 4 It is the three-dimensional structure schematic view of sleeve of the utility model;

[0022] Figure 5 It is the front view cross section structure schematic view of discharge pipe of the utility model.

[0023] In the figure: 1, bearing frame; 2, screw conveyor; 3, high temperature box; 4, feed inlet; 5, electric push rod; 6, slip ring; 7, discharge pipe; 8, drive motor; 9, drive shaft; 10, gear; 11, gear ring; 12, movable pipe; 13, push arm; 14, linkage shaft; 15, long connecting arm; 16, hinged shaft; 17, adjusting arm; 18, sleeve; 19, flexible hose; 20, limit ring; 21, air outlet pipe. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts fall within the protection scope of the utility model.

[0025] Please refer to Figures 1-5 The utility model provides an embodiment: a kind of plasma atomization powder making equipment suitable for high melting point metal, including bearing frame 1 and high temperature box 3, the top of bearing frame 1 is equipped with high temperature box 3, the top of high temperature box 3 is equipped with feed inlet 4, the bottom of high temperature box 3 is equipped with discharge pipe 7, the inside of discharge pipe 7 is provided with movable pipe 12, the top of movable pipe 12 is equipped with limit ring 20, and movable pipe 12 is movably connected with discharge pipe 7 by limit ring 20, drive motor 8 is installed on the outer wall of discharge pipe 7, drive motor 8 plays the role of power drive, the output end of drive motor 8 is equipped with drive shaft 9, and drive shaft 9 is equipped with gear 10 on surface, gear ring 11 is equipped on the surface of movable pipe 12 on one side of gear 10, and gear 10 and gear ring 11 are mutually engaged, and the bottom of movable pipe 12 is equipped with screw conveyor 2;

[0026] The metal wire is put into the inside of the high-temperature box 3 through the feeding port 4, and the inert gas is filled, the feeding port 4 is closed, then the inert gas is heated by the high-temperature box 3, and the metal wire is evaporated into steam under the action of the high-temperature inert gas plasma, because the density of the steam is small, so the steam will float to the upper part of the high-temperature box 3, at this time, the external helium gas source is connected with the flexible hose 19 through the pipeline, the gas pump is opened, the helium gas is pumped into the inside of the gas outlet pipe 21 by the gas pump and is sprayed from the gas outlet pipe 21 to the inside of the high-temperature box 3, under the gas extraction cooling effect of the helium gas, the metal in the steam state is rapidly cooled, so that the saturated metal vapor is rapidly condensed, nucleated and grown to form superfine powder, when the metal vapor needs to be fully gas extraction cooled, the electric push rod 5 can be opened, the push arm 13 is driven to move by the electric push rod 5, the sliding ring 6 is driven to slide on the outer wall of the high-temperature box 3 by the push arm 13, the long connecting arm 15 is driven to rotate by the sliding ring 6 through the linkage shaft 14, the adjusting arm 17 is driven to rotate by the long connecting arm 15 through the hinged shaft 16, under the movable cooperation of the gas outlet pipe 21 and the sleeve 18, the adjusting arm 17 drives the gas outlet pipe 21 to rotate in the inside of the sleeve 18, because the gas outlet pipe 21 is designed to be curved, so the blowing angle can be adjusted, under the repeated action of the electric push rod 5, the blowing direction can be reciprocatingly swung, so that the contact between the helium gas and the metal vapor is more uniform, the metal powder generation effect is improved, the convenient reciprocating swing type helium gas spraying for gas extraction cooling is realized, the uniformity of the contact between the helium gas and the metal vapor is increased, and the metal powder generation effect is improved;

[0027] The electric push rod 5 is arranged on the outer wall of the high-temperature box 3, the electric push rod 5 serves as a power drive, and the push arm 13 is arranged on the output end of the electric push rod 5; one end, away from the electric push rod 5, of the push arm 13 is movably connected with the sliding ring 6, and the sliding ring 6 is slidably connected with the high-temperature box 3;

[0028] A plurality of groups of long connecting arms 15 are arranged on the outer wall of the sliding ring 6 at equal intervals, one end, close to the sliding ring 6, of each long connecting arm 15 is provided with a linkage shaft 14, and the long connecting arm 15 is movably connected with the sliding ring 6 through the linkage shaft 14;

[0029] One end, away from the sliding ring 6, of each long connecting arm 15 is provided with an adjusting arm 17, one end, close to the long connecting arm 15, of the adjusting arm 17 is provided with a hinged shaft 16, and the adjusting arm 17 is movably connected with the long connecting arm 15 through the hinged shaft 16; one end, away from the long connecting arm 15, of the adjusting arm 17 is provided with a gas outlet pipe 21, and the gas outlet pipe 21 is fixedly connected with the adjusting arm 17;

[0030] The sleeve 18 is arranged on the side wall of the high-temperature box 3 on one side of the adjusting arm 17, the sleeve 18 extends into the inside of the high-temperature box 3, the gas outlet pipe 21 is movably connected with the sleeve 18 and extends into the inside of the high-temperature box 3, and one end of the gas outlet pipe 21 is provided with a flexible hose 19, and the flexible hose 19 is fixedly connected with the gas outlet pipe 21;

[0031] The metal powder generated falls to the bottom of the high-temperature box 3 under the action of gravity and accumulates. When the metal powder needs to be output, the valve at the bottom of the high-temperature box 3 is opened, the metal powder passes through the high-temperature box 3, the discharge pipe 7, and the movable pipe 12 into the interior of the screw conveyor 2, and is conveyed out by the screw conveyor 2. When the output position needs to be adjusted, the drive motor 8 is opened, the gear 10 is driven to rotate by the drive shaft 9, the movable pipe 12 is driven to rotate by the gear 10 through the gear ring 11 under the mutual meshing of the gear 10 and the gear ring 11 and the movable cooperation of the movable pipe 12 and the discharge pipe 7, the screw conveyor 2 is driven to rotate by the movable pipe 12, the output position of the screw conveyor 2 is adjusted, the metal powder is conveniently output from different positions, and the flexibility of the metal powder output is improved.

[0032] Working principle: The metal wire is put into the interior of the high-temperature box 3 through the feeding port 4, and the inert gas is filled, the feeding port 4 is closed, then the inert gas is heated by the high-temperature box 3, the metal wire is evaporated into steam under the action of the high-temperature inert gas plasma, because the density of the steam is small, so the steam will float to the upper part of the high-temperature box 3, at this time the external helium gas source is connected with the flexible hose 19 through the pipeline, the helium gas is pumped into the interior of the air outlet pipe 21 by the air pump and sprayed into the interior of the high-temperature box 3 from the air outlet pipe 21, under the gas extraction cooling effect of the helium gas, the metal in the steam state is rapidly cooled, the saturated metal vapor is rapidly condensed, nucleated, and grown to form superfine powder, when the metal vapor needs to be fully gas extraction cooled, the push arm 13 is moved by the electric push rod 5, the sliding ring 6 is slid on the outer wall of the high-temperature box 3 by the push arm 13, the long connecting arm 15 is rotated by the sliding ring 6 through the linkage shaft 14, the adjusting arm 17 is rotated by the long connecting arm 15 through the hinged shaft 16, the air outlet pipe 21 is rotated in the sleeve 18 by the adjusting arm 17 under the movable cooperation of the air outlet pipe 21 and the sleeve 18, because the air outlet pipe 21 is designed to be curved, so the angle of blowing can be adjusted, under the repeated action of the electric push rod 5, the blowing direction can be reciprocatingly swung, and then the contact between the helium gas and the metal vapor is more uniform, the effect of the metal powder generation is improved, the metal powder generated falls to the bottom of the high-temperature box 3 under the action of gravity and accumulates, when the metal powder needs to be output, the valve at the bottom of the high-temperature box 3 is opened, the metal powder passes through the high-temperature box 3, the discharge pipe 7, and the movable pipe 12 into the interior of the screw conveyor 2, and is conveyed out by the screw conveyor 2, when the output position needs to be adjusted, the gear 10 is driven to rotate by the drive shaft 9, the movable pipe 12 is driven to rotate by the gear 10 through the gear ring 11 under the movable cooperation of the movable pipe 12 and the discharge pipe 7, the screw conveyor 2 is driven to rotate by the movable pipe 12, the output position of the screw conveyor 2 is adjusted, the metal powder is conveniently output from different positions, and the flexibility of the metal powder output is improved.

Claims

1. A plasma atomization powder-making device suitable for high-melting-point metals, comprising a support frame (1) and a high-temperature chamber (3), characterized in that: A high-temperature chamber (3) is installed at the top of the support frame (1). A feed inlet (4) is installed at the top of the high-temperature chamber (3). A discharge pipe (7) is installed at the bottom of the high-temperature chamber (3). A movable pipe (12) is provided inside the discharge pipe (7). A limit ring (20) is installed at the top of the movable pipe (12). The movable pipe (12) is movably connected to the discharge pipe (7) through the limit ring (20). A drive motor (8) is installed on the outer wall of the discharge pipe (7). A drive shaft (9) is installed at the output end of the drive motor (8). A gear (10) is fitted on the surface of the drive shaft (9). A toothed ring (11) is fitted on the surface of the movable pipe (12) on one side of the gear (10). The gear (10) and the toothed ring (11) mesh with each other. A screw conveyor (2) is installed at the bottom of the movable pipe (12).

2. The plasma atomization powder-making equipment suitable for high-melting-point metals according to claim 1, characterized in that: An electric push rod (5) is provided on the outer wall of the high temperature chamber (3), and a push arm (13) is installed at the output end of the electric push rod (5).

3. The plasma atomization powder-making equipment suitable for high-melting-point metals according to claim 2, characterized in that: The push arm (13) is movably fitted with a slip ring (6) at the end away from the electric push rod (5), and the slip ring (6) is slidably connected to the high temperature chamber (3).

4. The plasma atomization powder-making equipment suitable for high-melting-point metals according to claim 3, characterized in that: The outer wall of the slip ring (6) is provided with multiple sets of long connecting arms (15) at equal intervals. Each long connecting arm (15) is provided with a linkage shaft (14) at one end near the slip ring (6), and the long connecting arm (15) is movably connected to the slip ring (6) through the linkage shaft (14).

5. The plasma atomization powder-making equipment suitable for high-melting-point metals according to claim 4, characterized in that: Each of the long connecting arms (15) is provided with an adjusting arm (17) at the end away from the slip ring (6). Each of the adjusting arms (17) is provided with a hinge shaft (16) at the end near the long connecting arm (15). The adjusting arm (17) is movably connected to the long connecting arm (15) through the hinge shaft (16).

6. The plasma atomization powder-making equipment suitable for high-melting-point metals according to claim 5, characterized in that: The end of the adjusting arm (17) away from the long connecting arm (15) is provided with an air outlet pipe (21), and the air outlet pipe (21) is fixedly connected to the adjusting arm (17).

7. The plasma atomization powder-making equipment suitable for high-melting-point metals according to claim 5, characterized in that: A sleeve (18) is provided on the side wall of the high temperature chamber (3) on one side of the adjusting arm (17), and the sleeve (18) extends into the interior of the high temperature chamber (3). The air outlet pipe (21) is movably connected to the sleeve (18) and extends into the interior of the high temperature chamber (3).

8. The plasma atomization powder-making equipment suitable for high-melting-point metals according to claim 6, characterized in that: One end of each of the air outlet pipes (21) is provided with a flexible hose (19), and the flexible hose (19) is fixedly connected to the air outlet pipe (21).

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