Metal atomization device

Abstract

The utility model provides a metal atomization device which comprises an annular atomization disc, an annular air cavity, an annular air inlet and an annular air outlet. A plurality of rotationally symmetrical air holes are formed in the bottom plate on the lower side of the atomizing disc, so that the air cavity is communicated with the outside; the air holes are arranged in an inclined manner, and extension lines of the axes of the air holes extending downwards intersect at one point as an intersection point; a flow guide rod which is vertically arranged is inserted into the atomizing disc, and the flow guide rod coincides with the intersection point; and the metal liquid is adhered to the upper part of the flow guide rod, flows downwards along the flow guide rod and passes through the intersection point. Due to the arrangement of the flow guide rod, resistance can be formed on the metal liquid, the speed is low when the metal liquid flows downwards along the flow guide rod, the contact time of the metal liquid and airflow is longer, the yield of the metal powder is higher, the outer side of the metal liquid is impacted by the airflow, and the inner side of the metal liquid is supported by the flow guide rod, so that the position of the metal liquid is more stable; and the impact force of the airflow is larger, so that the particle size of the formed metal powder is smaller and can reach below 10 meshes.

Description

Technical Field

[0001] The utility model relates to the technical field of metal atomization, in particular to a metal atomization device. Background Art

[0002] Metal powder is generally formed by an atomizer. The forming process is to first melt the metal into liquid, then use centrifugal or jet methods to break up the liquid metal, and finally cool it into metal powder.

[0003] Thus, Chinese patent CN101966589B discloses a composite atomizer for manufacturing gas atomized rapid solidification spherical fine metal powder, including a clamp pot for containing molten metal, an annular atomizer chamber connected to a high-speed airflow source and arranged around a molten metal liquid guide pipe at the bottom of the clamp pot, and an inner and outer concentric nozzle rings composed of a plurality of nozzles arranged in a uniform arrangement are arranged around the annular bottom surface of the atomizer chamber, and the nozzles are arranged in a side-slanting manner with their axes intersecting with the lower extension line of the axis of the guide pipe. When the molten metal flows downward from the guide pipe, it is sprayed by the airflow in the nozzle ring, so that the molten metal is dispersed and cooled into metal powder.

[0004] Since the force acting on the molten metal when it flows downward from the liquid guide tube is gravity, the molten metal flows downward at a faster speed and the contact time with the air flow is shorter, which results in a lower yield of metal powder and a larger particle size of the formed metal powder. Utility Model Content

[0005] In order to solve the technical problems in the background technology, the utility model discloses a metal atomization device.

[0006] The utility model provides a metal atomization device, comprising an annular atomization disk, an annular air cavity is arranged inside the disk;

[0007] The bottom plate on the lower side of the atomizing disk is provided with a plurality of rotationally symmetrical air holes, which connect the air cavity with the outside world, and the compressed air is ejected from the air holes;

[0008] The pores are arranged obliquely, and the extended lines of their axes extending downwards meet at one point, which is set as the intersection point;

[0009] A vertically arranged flow guide rod is inserted into the atomizing disk, and the flow guide rod coincides with the intersection point;

[0010] The metal liquid adheres to the upper part of the guide rod, flows downward along the guide rod, and passes through the intersection point.

[0011] The setting of the guide rod will form resistance to the metal liquid, making the metal liquid flow slowly when it flows downward along the guide rod, so the contact time with the airflow is longer, and the yield of metal powder is higher. In addition, the outer side of the metal liquid is impacted by the airflow, and the inner side is supported by the guide rod. Therefore, the position of the metal liquid is more stable and the impact force of the airflow is greater, so that the metal powder formed has a smaller particle size, which can reach less than 10 meshes.

[0012] Since the air hole and the bottom plate form an acute angle, the processing difficulty is high and the processing error is also large. Based on this, further improvements are: the bottom plate and the inner plate of the atomizer disk are connected by a transition plate; the air hole is set on the transition plate and is perpendicular to the transition plate. In this way, the air hole drilling is carried out with the transition plate as the reference, and its efficiency and precision are higher.

[0013] Furthermore, the inner plate has a wedge-shaped cross section, and its expanded end is connected to the transition plate. With such arrangement, the inner plate guides the airflow to the air holes, thereby increasing the air velocity of the air holes.

[0014] The atomizing disk is connected with an air inlet pipe, and the position of the air inlet pipe directly affects the degree of circumference and flow rate of the airflow in the air cavity. Based on this, a further improvement is that the air inlet pipe is connected to the outer position of the air cavity. In this way, the airflow will be guided by the outer wall of the air cavity to form a vortex, thereby increasing the flow rate of the airflow.

[0015] If the atomizer disk is formed by casting, it is not only costly but also has low precision in the position of the air holes. Based on this, further improvements are made in that the atomizer disk includes a coaxially arranged, tubular outer plate and inner plate; an annular top plate is welded between the constricted ends of the outer plate and the inner plate; and a bottom plate is welded between the outer plate and the transition plate.

[0016] If the transition plate is welded to the inner plate, the position accuracy of the air holes will be affected. Based on this, a further design is that the transition plate and the inner plate are integrally formed.

[0017] Since the top plate and the inner plate form an acute angle, the connection area is small during welding and the connection strength is not high. Based on this, further improvements are: a chamfer is provided at the connection between the top plate and the inner plate, so that the connection surface between the top plate and the inner plate is composed of the chamfered surface and the inner side surface; the welding point between the top plate and the inner plate is composed of a first welding point and a second welding point; the first welding point connects the inner side surface and the inner plate; and the two ends of the first welding point are flush with the two sides of the top plate; the second welding point connects the chamfered surface and the first welding point.

[0018] Since the temperature of the metal liquid is relatively high, the guide rod is easily melted. Based on this, a further improvement is that the material of the guide rod is corundum. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a top view of the utility model;

[0021] Figure 2 It is a front sectional view of the utility model;

[0022] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0023] In the figure: 1, atomizing disk; 2, air cavity; 3, air hole; 4, guide rod; 5, first welding point; 6, second welding point; 11, bottom plate; 12, inner plate; 13, transition plate; 14, air inlet pipe; 15, outer plate; 16, top plate; 121, chamfered surface; 122, inner side surface; a, intersection point. DETAILED DESCRIPTION

[0024] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0025] Embodiment 1:

[0026] like Figure 1 and Figure 2 As shown, the utility model discloses a metal atomization device, including an annular atomization disk 1, inside which an annular air cavity 2 is arranged. An air inlet pipe 14 is connected to the atomization disk 1, and airflow enters the air cavity 2 from the air inlet pipe 14. The air inlet pipe 14 is connected to the outer position of the air cavity 2. In this arrangement, the airflow will be guided by the outer wall of the air cavity 2 to form a vortex, thereby increasing the flow rate of the airflow.

[0027] The bottom plate 11 at the lower side of the atomizing disk 1 is provided with a plurality of rotationally symmetrical air holes 3, which connect the air cavity 2 with the outside. The air holes 3 are arranged obliquely, and the extended lines of their axes extending downwards intersect at one point, which is set as the intersection point a.

[0028] The bottom plate 11 is connected to the inner plate 12 of the atomizing disk 1 through a transition plate 13; the air hole 3 is arranged on the transition plate 13 and is perpendicular to the transition plate 13. With such an arrangement, the air hole 3 is drilled with the transition plate 13 as a reference, and its efficiency and precision are higher.

[0029] The inner plate 12 has a wedge-shaped cross section, and its expanded end is connected to the transition plate 13. In this way, the inner plate 12 guides the airflow, guides the airflow to the air hole 3, and increases the outlet flow velocity of the air hole 3.

[0030] A vertically arranged guide rod 4 is inserted into the atomizing disk 1, and its axis coincides with the atomizing disk 1. The guide rod 4 coincides with the intersection a. The guide rod 4 is made of corundum, and its melting point is higher than the temperature of the metal liquid, so the service life of the guide rod 4 is longer.

[0031] The metal liquid adheres to the upper part of the guide rod 4, flows downward along the guide rod 4, and passes through the intersection a.

[0032] The setting of the guide rod 4 will form resistance to the metal liquid, making the metal liquid flow slowly when flowing downward along the guide rod 4, so that the contact time with the airflow is longer, and the yield of metal powder is higher. In addition, the outer side of the metal liquid is impacted by the airflow, and the inner side is supported by the guide rod 4. Therefore, the position of the metal liquid is more stable and the impact force of the airflow is greater, so that the metal powder formed has a smaller particle size, which can reach less than 10 meshes.

[0033] Embodiment 2:

[0034] Compared with the first embodiment, the difference is that the atomizing disk 1 includes a coaxially arranged, tubular outer plate 15 and inner plate 12; an annular top plate 16 is welded between the outer plate 15 and the constricted end of the inner plate 12; and a bottom plate 11 is welded between the outer plate 15 and the transition plate 13. The transition plate 13 and the inner plate 12 are integrally formed and connected. In this way, the atomizing disk 1 is spliced ​​and formed by welding, which not only has low processing difficulty and low cost, but also has higher position accuracy of the air hole 3.

[0035] Embodiment three:

[0036] Compared with the second embodiment, the difference is: Figure 3 As shown, the connection between the top plate 16 and the inner plate 12 is provided with a chamfer, so that the connection surface between the top plate 16 and the inner plate 12 is composed of the chamfered surface 121 and the inner side surface 122; the welding point between the top plate 16 and the inner plate 12 is composed of the first welding point 5 and the second welding point 6; the first welding point 5 connects the inner side surface 122 and the inner plate 12; and the two ends of the first welding point 5 are flush with the two sides of the top plate 16; the second welding point 6 connects the chamfered surface 121 and the first welding point 5. In this way, the connection strength between the top plate 16 and the inner plate 12 can be improved.

[0037] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A metal atomization device, characterized in that: It comprises an annular atomizing disk (1) with an annular air cavity (2) arranged inside the disk; The bottom plate (11) at the lower side of the atomizing disk (1) is provided with a plurality of rotationally symmetrical air holes (3) for connecting the air cavity (2) with the outside, and compressed air is ejected from the air holes (3); The air holes (3) are arranged obliquely, and the extended lines of their axes extending downwards intersect at one point, which is set as the intersection point (a); A vertically arranged flow guide rod (4) is inserted into the atomizing disk (1), and the flow guide rod (4) coincides with the intersection point (a); The metal liquid adheres to the upper part of the guide rod (4), flows downward along the guide rod (4), and passes through the intersection (a).

2. The metal atomizing device according to claim 1, characterized in that: The bottom plate (11) is connected to the inner plate (12) of the atomizing disk (1) via a transition plate (13); The air hole (3) is arranged on the transition plate (13) and is perpendicular to the transition plate (13).

3. The metal atomizing device according to claim 2, characterized in that: The inner plate (12) has a wedge-shaped cross section, and its expanded end is connected to the transition plate (13).

4. The metal atomizing device according to claim 1, characterized in that: The atomizing disk (1) is connected to an air inlet pipe (14); The air inlet pipe (14) is in communication with an outer position of the air cavity (2).

5. The metal atomizing device according to claim 3, characterized in that: The atomizing disk (1) comprises a coaxially arranged, tubular outer plate (15) and an inner plate (12); An annular top plate (16) is welded between the constricted ends of the outer plate (15) and the inner plate (12); A bottom plate (11) is welded between the outer plate (15) and the transition plate (13).

6. The metal atomizing device according to claim 5, characterized in that: The transition plate (13) and the inner plate (12) are integrally formed.

7. The metal atomizing device according to claim 5, characterized in that: A chamfer is provided at the connection between the top plate (16) and the inner plate (12), so that the connection surface between the top plate (16) and the inner plate (12) is composed of a chamfered surface (121) and an inner side surface (122); The welding points between the top plate (16) and the inner plate (12) are composed of a first welding point (5) and a second welding point (6); The first welding point (5) connects the inner side surface (122) and the inner plate (12); and the two ends of the first welding point are flush with the two sides of the top plate (16); The second welding point (6) connects the chamfered surface (121) and the first welding point (5).

8. The metal atomizing device according to claim 1, characterized in that: The material of the guide rod (4) is corundum.

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