Powder spraying device for spheroidizing alloy micro powder

Abstract

The utility model relates to the technical field of alloy micro-powder spheroidization, and particularly discloses a powder spraying device for alloy micro-powder spheroidization, in a normal state, a valve core is jacked upwards under the action of elastic force of a spring, so that the valve core is separated from an opening in the bottom end of a feeding pipe, meanwhile, a pressure relief ring upwards blocks the opening in the bottom end of an air inlet pipe, and when the opening in the bottom end of the feeding pipe is opened, the valve core is opened. The feeding device is started, the alloy micro powder is injected into the quartz melting bin through the feeding pipe, after the coil is connected with alternating current, an alternating magnetic field can be generated, after the alloy micro powder enters the quartz melting bin, induced current can be generated, the alloy micro powder can be heated and melted through the induced current in the alloy micro powder, alloy melt is formed, and the heating mode of the alternating magnetic field is fast, so that the alloy melt is formed. The alloy micro-powder can be melted when entering the magnetic field, the alloy micro-powder is rapidly heated through the alternating magnetic field generated by the coil, and the effects of shortening the heating time and improving the preparation efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of alloy micropowder spheroidization, and particularly relates to a powder spraying device for alloy micropowder spheroidization. Background Art

[0002] Spherical powders have good fluidity, which makes them perform excellently in precision manufacturing technologies such as 3D printing, powder metallurgy, and injection molding. The spheroidization process can make the components in the alloy powder more uniform, thereby improving the performance of the final product. Through the spheroidization treatment, the aggregation between particles can be effectively inhibited, and the stability of the powder can be maintained.

[0003] However, in the existing preparation devices, the alloy micropowder is heated by a heating rod. The contact area of the heating rod is limited, and it is difficult to fully contact with the alloy micropowder, resulting in a longer heating time and a lower preparation efficiency. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a powder spraying device for alloy micropowder spheroidization, which solves the technical problems that in the existing preparation devices, the alloy micropowder is heated by a heating rod, the contact area of the heating rod is limited, it is difficult to fully contact with the alloy micropowder, resulting in a longer heating time and a lower preparation efficiency.

[0006] (II) Technical Solutions

[0007] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0008] A powder spraying device for alloy micropowder spheroidization includes an air inlet pipe. A feed pipe is fixedly installed inside the air inlet pipe. A quartz melting chamber is fixedly installed at the bottom end of the air inlet pipe. A coil is fixedly installed on the outer side wall of the quartz melting chamber. A valve core is slidably installed inside the feed pipe. A pressure relief ring is fixedly installed at the bottom end of the valve core. A spring is fixedly installed at the top end of the valve core. A shell is fixedly installed on the outer side wall of the coil.

[0009] Preferably, a cooling ring is fixedly installed at the bottom end of the shell.

[0010] Preferably, a drainage port is opened on the inner side wall of the cooling ring.

[0011] (III) Beneficial Effects

[0012] 1. Connect the opening at the top of the intake pipe to high-pressure air, connect the opening at the top of the feed pipe to the alloy micropowder feeding device, and connect the coil to the AC power system. Under normal conditions, the valve core is pushed upward by the elastic force of the spring, causing the valve core to disengage from the opening at the bottom of the feed pipe. At the same time, the pressure relief ring is pushed upward to block the opening at the bottom of the intake pipe. When the opening at the bottom of the feed pipe is opened, the feeding device is activated, and alloy micropowder is injected into the quartz melting chamber through the feed pipe. After the coil is connected to the AC power, an alternating magnetic field is generated. When the alloy micropowder enters the quartz melting chamber, an induced current is generated. The induced current in the alloy micropowder causes the alloy micropowder to heat up and melt, forming an alloy melt. The heating method of the alternating magnetic field is relatively fast. When the alloy micropowder enters the magnetic field, it can be melted. Through the alternating magnetic field generated by the coil, the rapid heating of the alloy micropowder is completed, achieving the effect of reducing the heating time and improving the preparation efficiency.

[0013] 2. Connect the cooling ring to the cold air preparation device. After heating is completed, high-pressure air is injected into the intake pipe. When the pressure inside the intake pipe is greater than the elastic force of the spring, it will overcome the elastic force of the spring and cause the pressure relief ring to slide downward, opening the opening at the bottom of the intake pipe. During this process, the valve core will block the opening at the bottom of the feed pipe, so that the high-pressure air can carry the alloy melt and spray out from the bottom of the quartz melting chamber. The high-pressure air can cause the melt to atomize. When the atomized melt passes through the cooling ring, the cold air sprayed out along the drainage port inside the cooling ring will cool the atomized alloy melt, and it will quickly solidify into spherical particles during the cooling process. The cooling speed is very fast to ensure that the particles can maintain their spherical structure and prevent agglomeration. By using high-pressure air to push the pressure relief ring to block the opening at the bottom of the feed pipe, it can prevent the high-pressure air from flowing along the feed pipe and causing a lower pressure inside the quartz melting chamber, achieving the effect of increasing the pressure inside the quartz melting chamber and improving the atomization degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings.

[0015] Figure 1 Structural diagram of the intake pipe of the present invention;

[0016] Figure 2 Structural diagram of the quartz melting chamber of the present invention;

[0017] Figure 3 Cross-sectional structural diagram of the present invention;

[0018] Figure 4 Cross-sectional structural diagram of the cooling ring of the present invention;

[0019] Figure 5 Structural diagram of the valve core of the present invention.

[0020] Legend: 1. Intake pipe; 2. Feed pipe; 3. Quartz melting chamber; 4. Outer shell; 5. Coil; 6. Cooling ring; 7. Drain port; 8. Valve core; 9. Spring; 11. Pressure relief ring. Specific implementation mode

[0021] In the embodiment of the present application, by providing a powder spraying device for alloy micropowder spheroidization, the technical problem in the existing preparation device that the heating rod is used to heat the alloy micropowder, the contact area of the heating rod is limited, it is difficult to fully contact with the alloy micropowder, resulting in a long heating time and low preparation efficiency is effectively solved. The opening at the top of the intake pipe is connected to high-pressure air, and the opening at the top of the feed pipe is connected to the alloy micropowder feeding device. The coil is connected to the alternating current system. Under normal conditions, the valve core is pushed upward by the elastic force of the spring, so that the valve core is separated from the opening at the bottom of the feed pipe. At the same time, the pressure relief ring is pushed upward to block the opening at the bottom of the intake pipe. When the opening at the bottom of the feed pipe is opened, the feeding device is started, and the alloy micropowder is injected into the quartz melting chamber through the feed pipe. After the coil is connected to the alternating current, an alternating magnetic field will be generated. When the alloy micropowder enters the quartz melting chamber, an induced current will be generated. The induced current in the alloy micropowder will cause the alloy micropowder to heat up and melt to form an alloy melt. The heating method of the alternating magnetic field is relatively fast, and the alloy micropowder can be melted when it enters the magnetic field. Through the alternating magnetic field generated by the coil, the rapid heating of the alloy micropowder is completed, achieving the effect of reducing the heating time and improving the preparation efficiency. The cooling ring is connected to the cold air preparation device. After the heating is completed, high-pressure air is injected into the intake pipe. When the pressure inside the intake pipe is greater than the elastic force of the spring, it will overcome the elastic force of the spring and cause the pressure relief ring to slide downward, opening the opening at the bottom of the intake pipe. During this process, the valve core will block the opening at the bottom of the feed pipe, so that the high-pressure air can carry the alloy melt and spray out from the bottom of the quartz melting chamber. The high-pressure air can cause the melt to atomize. When the atomized melt passes through the cooling ring, the cold air sprayed out along the drain port inside the cooling ring will cool the atomized alloy melt, and it will quickly solidify into spherical particles during the cooling process. The cooling speed is very fast to ensure that the particles can maintain their spherical structure and prevent agglomeration. By using the high-pressure air to push the pressure relief ring to block the opening at the bottom of the feed pipe, it can prevent the high-pressure air from flowing along the feed pipe and causing the pressure inside the quartz melting chamber to be relatively low, achieving the effect of increasing the pressure inside the quartz melting chamber and improving the atomization degree. Embodiment

[0022] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 And Figure 5As shown in the figure, the technical solution in the embodiment of the present application effectively solves the technical problem in the existing preparation device that when heating alloy micropowders with a heating rod, the contact area of the heating rod is limited, it is difficult to fully contact with the alloy micropowders, resulting in a long heating time and low preparation efficiency. The general idea is as follows:

[0023] In view of the problems existing in the prior art, the present utility model provides a powder spraying device for spheroidizing alloy micropowders, which includes an air inlet pipe 1. A feed pipe 2 is fixedly installed inside the air inlet pipe 1. A quartz melting chamber 3 is fixedly installed at the bottom end of the air inlet pipe 1. A coil 5 is fixedly installed on the outer side wall of the quartz melting chamber 3.

[0024] A valve core 8 is slidably installed inside the feed pipe 2. A pressure relief ring 11 is fixedly installed at the bottom end of the valve core 8. A spring 9 is fixedly installed at the top end of the valve core 8.

[0025] A housing 4 is fixedly installed on the outer side wall of the coil 5. A cooling ring 6 is fixedly installed at the bottom end of the housing 4. A drainage port 7 is opened on the inner side wall of the cooling ring 6.

[0026] Working principle:

[0027] In the first step, the opening at the top end of the air inlet pipe 1 is connected to high-pressure air, and the opening at the top end of the feed pipe 2 is connected to an alloy micropowder feeding device. The coil 5 is connected to an alternating current system. Under normal conditions, under the action of the elastic force of the spring 9, the valve core 8 is pushed upward, so that the valve core 8 is separated from the opening at the bottom end of the feed pipe 2. At the same time, the pressure relief ring 11 is pushed upward to block the opening at the bottom end of the air inlet pipe 1. When the opening at the bottom end of the feed pipe 2 is opened, the feeding device is started, and alloy micropowders are injected into the quartz melting chamber 3 through the feed pipe 2. After the coil 5 is connected to the alternating current, an alternating magnetic field will be generated. When the alloy micropowders enter the quartz melting chamber 3, an induced current will be generated. The induced current in the alloy micropowders will cause the alloy micropowders to heat up and melt to form an alloy melt. The heating method of the alternating magnetic field is relatively fast. When the alloy micropowders enter the magnetic field, they can be melted. Through the alternating magnetic field generated by the coil 5, the rapid heating of the alloy micropowders is completed, achieving the effect of reducing the heating time and improving the preparation efficiency.

[0028] Step 2: Connect the cooling ring 6 to the cold air preparation device. After heating is completed, high-pressure air is injected into the air inlet pipe 1. When the internal pressure of the air inlet pipe 1 is greater than the elastic force of the spring 9, it will overcome the elastic force of the spring 9 and cause the pressure relief ring 11 to slide downward, opening the opening at the bottom end of the air inlet pipe 1. During this process, the valve core 8 will block the opening at the bottom end of the feed pipe 2, so that the high-pressure air can carry the alloy melt and spray out from the bottom end of the quartz melting chamber 3. The high-pressure air can cause the melt to atomize. When the atomized melt passes through the cooling ring 6, the cold air sprayed out along the drainage port 7 inside the cooling ring 6 will cool the atomized alloy melt, and it will quickly solidify into spherical particles during the cooling process. The cooling speed is very fast to ensure that the particles can maintain their spherical structure and prevent agglomeration. By using the high-pressure air to push the pressure relief ring 11 to block the opening at the bottom end of the feed pipe 2, it can prevent the high-pressure air from flowing along the feed pipe 2 and causing a lower internal pressure in the quartz melting chamber 3, achieving the effect of increasing the internal pressure of the quartz melting chamber 3 and improving the atomization degree.

[0029] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A powder spraying device for spheroidizing alloy powder, comprising an air inlet pipe (1), characterized in that: A feed pipe (2) is fixedly mounted inside the air intake pipe (1), a quartz melting chamber (3) is fixedly mounted at the bottom end of the air intake pipe (1), and a coil (5) is fixedly mounted on the outer wall of the quartz melting chamber (3).

2. A powder spraying device for spheroidizing alloy powder as claimed in claim 1, characterized in that: A valve core (8) is slidably mounted inside the feed pipe (2), and a pressure relief ring (11) is fixedly mounted at the bottom end of the valve core (8).

3. A powder spraying device for spheroidizing alloy powder as claimed in claim 2, characterized in that: A spring (9) is fixedly mounted on the top end of the valve core (8).

4. A powder spraying device for spheroidizing alloy powder as claimed in claim 1, characterized in that: A housing (4) is fixedly mounted on the outer side wall of the coil (5).

5. A powder spraying device for spheroidizing alloy powder as claimed in claim 4, characterized in that: A cooling ring (6) is fixedly mounted on the bottom end of the outer shell (4).

6. A powder spraying device for spheroidizing alloy powder as claimed in claim 5, characterized in that: The inner side wall of the cooling ring (6) is provided with a discharge port (7).

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