Atomization flow limiting device capable of preventing molten metal from being blocked

Abstract

The utility model discloses an atomization flow limiting device capable of preventing molten metal from being blocked, which comprises a flow guide pipe, a built-in hole is arranged on the inner side of the flow guide pipe, a connecting nozzle is arranged at the upper end of the flow guide pipe, and the inner side of the connecting nozzle is obliquely arranged; a discharging nozzle is formed in the lower end of the built-in hole; and a gas atomization spraying disc is mounted on the outer side of the lower end of the flow guide pipe. The utility model belongs to the technical field of metal powder preparation, and aims to solve the problem that a flow guide pipe is easy to block in the prior art. The technical effects that the inner hole wall at the tail end of a traditional built-in hole is changed into a structure with a certain inclination angle, a wedge-shaped horn mouth is formed, and when a metal tumor is formed, the metal tumor is easily pressed out of the flow guide pipe by utilizing the large pressure difference between the smelting chamber and the air pressure chamber and the gravity of the metal tumor, so that the metal tumor falls into the atomizing chamber, and the atomization effect is improved. Normal flowing of the molten metal in the flow guide pipe is recovered, and the flow guide pipe blocking problem is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal powder preparation, in particular to an atomizing current limiting device for preventing metal liquid from being blocked. Background Art

[0002] In the engineering application of vacuum furnace gas atomization powder making, problems such as blockage of the guide pipe and pouring failure often occur, which seriously affects the powder quality and production efficiency. Such problems are usually solved by increasing the diameter of the guide hole, increasing the superheat of the melt, increasing the pressure difference between the melting chamber and the atomization chamber, and increasing the melt flow rate;

[0003] However, if other process conditions remain unchanged, the gas-liquid ratio will be reduced, resulting in coarser powder, less sphericity, lower powder recovery rate and other problems; if the relevant process conditions are changed and the gas-liquid ratio is increased, it will lead to blockage of the guide tube and casting failure. Therefore, while keeping the process conditions unchanged, it has become an urgent problem to solve the problem of molten metal blockage through the optimized design of the guide tube structure. The present invention provides an optimized guide tube structure for solving the problem of molten metal blockage. Utility Model Content

[0004] To this end, the utility model provides an atomizing flow-limiting device for preventing molten metal from being blocked, so as to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] According to the first aspect of the utility model, an atomizing flow-limiting device for preventing blockage of molten metal comprises a flow guide tube, the inner side of which is provided with a built-in hole, the upper end of the flow guide tube is provided with a connection nozzle, and the inner side of the connection nozzle is inclined;

[0007] A discharge nozzle is provided at the lower end of the built-in hole, and the inner side of the discharge nozzle is inclined;

[0008] An aerosol spray disc is installed on the outer side of the lower end of the guide tube, and a dividing groove opened on the outer side of the guide tube is arranged on the inner side of the aerosol spray disc.

[0009] Furthermore, the built-in holes are arranged in a step shape.

[0010] Furthermore, a buffer ring is installed on the outer side of the separation groove.

[0011] Furthermore, a mounting ring is installed on the inner side of the aerosol spray disc, and a blade installed under the guide pipe is arranged on the upper side of the mounting ring.

[0012] Furthermore, a groove structure is provided on the upper surface of the mounting ring for the blades to slide.

[0013] Furthermore, an air inlet hole is opened at the inner rear side of the mounting ring, and an air inlet pipe is connected to the outer side of the air inlet hole.

[0014] Furthermore, an air outlet is provided on the inner front side of the mounting ring.

[0015] The utility model has the following advantages:

[0016] 1. The inner hole wall at the end of the traditional built-in hole is changed to a structure with a certain inclination angle to form a wedge-shaped trumpet. When the metal nodule is formed, the large pressure difference between the smelting chamber and the air pressure chamber, as well as the gravity of the metal nodule itself, is used to easily press the metal nodule out of the guide tube and make it fall into the atomization chamber, thereby restoring the normal flow of the molten metal in the guide tube and solving the blockage problem of the guide tube.

[0017] 2. The inner side of the atomizing spray disc is provided with a separation groove opened on the outer side of the guide tube. Without affecting the coordination between the atomizing spray disc and the guide tube, a groove is opened on the wall of the guide tube where the atomizing spray disc and the guide tube are in contact, so that the heat transfer form is changed from direct contact between the guide tube and the atomizing spray disc to convection heat exchange of the air, thereby reducing the heat transfer efficiency, reducing temperature loss, preventing the metal liquid from cooling in the guide tube, solving the problem of blockage of the guide tube, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A front cross-sectional view of an atomizing flow-limiting device for preventing molten metal from being blocked, provided in some embodiments of the utility model.

[0019] Figure 2 A top view of the connection between an air inlet hole and a mounting ring of an atomizing flow limiting device for preventing clogging of molten metal provided in some embodiments of the utility model.

[0020] In the figure: 1. guide pipe, 2. atomizing spray disc, 3. connecting nozzle, 4. built-in hole, 5. discharge nozzle, 6. blade, 7. mounting ring, 8. buffer ring, 9. dividing groove, 10. air inlet hole, 11. air inlet pipe, 12. air outlet hole. DETAILED DESCRIPTION

[0021] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0022] like Figure 1 to Figure 2As shown, an atomizing flow-limiting device for preventing blockage of molten metal in the embodiment of the first aspect of the utility model comprises a flow guide tube 1, a built-in hole 4 is provided on the inner side of the flow guide tube 1, a connecting nozzle 3 is provided on the upper end of the flow guide tube 1, and the inner side of the connecting nozzle 3 is inclined to fit with the corresponding liquid inlet pipe, which can increase the installation limit degree with the liquid inlet pipe to avoid skewness and reduce the possibility of leakage to the outside during the liquid inlet process. The built-in hole 4 is arranged in a step shape, so that the internal pressure can be gradually relieved when the molten metal is led out;

[0023] A discharge nozzle 5 is provided at the lower end of the built-in hole 4, and the inner side of the discharge nozzle 5 is inclined. The inner hole wall at the end of the traditional built-in hole 4 is changed into a structure with a certain inclined angle to form a wedge-shaped trumpet mouth. When the metal nodule is formed, the large pressure difference between the smelting chamber and the air pressure chamber, as well as the gravity of the metal nodule itself, is utilized to easily press the metal nodule out of the guide tube 1 and make it fall into the atomization chamber, thereby restoring the normal flow of the molten metal in the guide tube and solving the blockage problem of the guide tube.

[0024] An atomizing spray disc 2 is installed on the outer side of the lower end of the guide tube 1, and a dividing groove 9 opened on the outer side of the guide tube 1 is provided on the inner side of the atomizing spray disc 2. Without affecting the cooperation between the atomizing spray disc 2 and the guide tube 1, a groove is opened on the wall of the guide tube 1 at the contact point between the atomizing spray disc 2 and the guide tube 1, and the heat transfer form is changed from direct contact between the guide tube 1 and the atomizing spray disc 2 to convection heat exchange of the air, thereby reducing the heat transfer efficiency, reducing temperature loss, preventing the metal liquid from cooling in the guide tube 1, solving the blockage problem of the guide tube 1, and improving production efficiency.

[0025] The technical effects achieved by the above embodiments are: by using the inner chamfer of the guide end, the metal nodule that gradually solidifies at the end of the guide tube falls under the large pressure difference between the smelting chamber and the air pressure chamber and its own gravity, thereby improving the blockage of the guide tube by the metal nodule caused by the metal viscosity and air flow turbulence of the molten metal flow, and by designing the grooves on the wall of the guide tube, the heat transfer generated by the contact between the spray disc and the guide tube is reduced, and the heat conduction efficiency is reduced, thereby improving the cooling and solidification of the molten metal in the tube, causing the blockage of the guide tube. While ensuring that the powder quality and powder collection rate remain unchanged, the casting success rate and production efficiency are effectively improved. Example

[0026] like Figure 1 and Figure 2 As shown, an atomizing flow-limiting device for preventing blockage of molten metal includes all the contents of Example 1. In addition, a buffer ring 8 is installed on the outer side of the dividing groove 9.

[0027] The technical effect achieved by the above embodiment is: further reducing the contact between the atomizing spray disc 2 and the guide tube 1, while increasing the buffer between the atomizing spray disc 2 and the guide tube 1, avoiding partial vibration generated during the introduction of molten metal, resulting in a hard collision between the guide tube 1 and the atomizing spray disc 2, and causing the possibility of damage to the guide tube 1 or the atomizing spray disc 2. Example

[0028] like Figure 1 and Figure 2 As shown, an atomizing flow limiting device for preventing clogging of molten metal includes all the contents of Example 2. In addition, a mounting ring 7 is installed on the inner side of the atomizing spray disc 2, and a blade 6 installed under the guide pipe 1 is arranged on the upper side of the mounting ring 7. A groove structure is provided on the upper surface of the mounting ring 7 for the blade 6 to slide. An air inlet hole 10 is provided on the inner rear side of the mounting ring 7, and an air inlet pipe 11 is connected to the outer side of the air inlet hole 10. An air outlet hole 12 is provided on the inner front side of the mounting ring 7 for air outlet.

[0029] The technical effect achieved by the above embodiment is: the high-temperature gas introduced into the air inlet pipe 11 can blow the blades 6, thereby rotating the guide pipe 1, so that the molten metal diffuses outward in a spiral shape after being blown out. The spiral airflow can provide a rotational force for the molten metal, which helps to disperse the molten metal more evenly into small droplets, thereby obtaining a more uniform powder.

Claims

1. An atomizing current limiting device for preventing blockage of molten metal, characterized in that: It comprises a flow guide tube (1), the inner side of which is provided with a built-in hole (4), the upper end of the flow guide tube (1) is provided with a connection nozzle (3), and the inner side of the connection nozzle (3) is arranged in an inclined manner; A discharge nozzle (5) is provided at the lower end of the built-in hole (4), and the inner side of the discharge nozzle (5) is arranged in an inclined manner; An aerosol spray disc (2) is installed on the outer side of the lower end of the flow guide tube (1), and a partition groove (9) opened on the outer side of the flow guide tube (1) is provided on the inner side of the aerosol spray disc (2).

2. The atomizing flow limiting device for preventing blockage of molten metal according to claim 1, characterized in that: The built-in hole (4) is arranged in a step-like shape.

3. The atomizing flow limiting device for preventing blockage of molten metal according to claim 1, characterized in that: A buffer ring (8) is also installed on the outer side of the separation groove (9).

4. The atomizing flow limiting device for preventing blockage of molten metal according to claim 1, characterized in that: A mounting ring (7) is also installed on the inner side of the aerosol spray disc (2), and a blade (6) installed under the guide tube (1) is provided on the upper side of the mounting ring (7).

5. The atomizing flow limiting device for preventing blockage of molten metal according to claim 4, characterized in that: The upper surface of the mounting ring (7) is provided with a groove-shaped structure for the blades (6) to slide.

6. The atomizing flow limiting device for preventing blockage of molten metal according to claim 5, characterized in that: An air inlet hole (10) is provided on the inner rear side of the mounting ring (7), and an air inlet pipe (11) is connected to the outer side of the air inlet hole (10).

7. The atomizing flow limiting device for preventing blockage of molten metal according to claim 6, characterized in that: An air outlet hole (12) is provided on the inner front side of the mounting ring (7).

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