Vacuum rapid quenching furnace with automatic constant pressure protection

Abstract

The utility model provides a vacuum rapid quenching furnace with automatic constant voltage protection relates to the technical field of rapid quenching furnace, including furnace body, the upper portion of furnace body inside is equipped with smelting chamber, is equipped with quartz crucible under smelting chamber, the bottom of quartz crucible is equipped with liquid outlet, is equipped with fling belt chamber under quartz crucible, the top of furnace body is equipped with feed inlet and smelting chamber intercommunication, is equipped with inlet pipeline and quartz crucible top intercommunication, is equipped with pressure sensor and electric control proportional valve in inlet pipeline. The utility model discloses reasonable in design, through the closed loop feedback control of pressure sensor, electric control proportional valve and controller, can ensure in the whole fling belt process, the gas pressure of acting on alloy liquid is high and stable, greatly improves product pass rate, and need not staff manual intervention, reduces the labor intensity and the operation difficulty.

Description

Technical Field

[0001] This utility model mainly relates to the field of rapid quenching furnace technology, specifically to a vacuum rapid quenching furnace with automatic constant pressure protection. Background Technology

[0002] Rapid quenching furnaces (also known as strip spinning furnaces) are key equipment for preparing amorphous and microcrystalline alloy strips. Their basic principle is to spray molten alloy onto the surface of high-speed rotating cooling rollers, achieving extremely rapid cooling (typically up to 1000 rpm). 5 -10 6 K / s), which causes the alloy to solidify into an amorphous or microcrystalline state.

[0003] In the rapid quenching process, molten alloy is injected into a quartz crucible (or nozzle), and then the molten alloy is squeezed out from the slit at the bottom of the crucible by the gas pressure (usually an inert gas such as argon) applied to the surface of the melt, forming a stable liquid flow that is sprayed onto the cooling roller.

[0004] During the actual implementation process, the inventors discovered the following defects: During the spinning process in the rapid quenching furnace, as the molten alloy is continuously sprayed out, the liquid level in the crucible will continue to drop, resulting in a slower liquid outflow rate under the same air pressure. This requires manual adjustment by the operator, which increases the labor intensity and psychological pressure of the operator, and makes it difficult to achieve precise constant pressure control. Summary of the Invention

[0005] Therefore, this utility model provides a vacuum rapid quenching furnace with automatic constant pressure protection to solve the problems mentioned in the background art, so that the alloy liquid in the rapid quenching furnace can maintain the same outflow speed under the action of air pressure during the continuous spraying of the crucible.

[0006] The technical solution provided by this utility model is: a vacuum rapid quenching furnace with automatic constant pressure protection, including a furnace body, a melting chamber provided at the top inside the furnace body, a quartz crucible provided below the melting chamber, a liquid outlet provided at the bottom of the quartz crucible, and a strip-spinning chamber provided below the quartz crucible; The furnace body is equipped with a feeding hopper and an air inlet pipe at the top. The feeding hopper is connected to the melting chamber, and the air inlet pipe is connected to the top of the quartz crucible. The air inlet pipe is equipped with a pressure sensor and an electronically controlled proportional valve.

[0007] Furthermore: a pressure stabilizing tank is provided on the top of the furnace body, and the pressure stabilizing tank is connected to the air inlet pipe.

[0008] Furthermore: the outer end of the intake pipe is connected to an air source, and the electronically controlled proportional valve is installed near the air source.

[0009] Furthermore: a first motor is fixedly installed on the outside of the furnace body at a position in the spinning chamber, and a cooling roller is connected to the output end of the first motor, the cooling roller being located in the spinning chamber.

[0010] Furthermore: a discharge port is provided at the bottom of the furnace body, and a collection bucket is provided below the discharge port.

[0011] Furthermore, the collection bucket is equipped with multiple partitions, which divide the inside of the collection bucket into multiple independent filling areas.

[0012] Furthermore: a discharge pipe is rotatably connected to the bottom of the discharge port, and a rotating component is provided on the outside of the discharge pipe. When the discharge pipe rotates, it faces different filling areas inside the collection bucket.

[0013] Furthermore: the rotating assembly includes a second motor fixedly installed at one end of the bottom of the furnace body, the output end of the second motor is connected to a drive wheel, the discharge pipe is fitted with a driven wheel, and the drive wheel and the driven wheel mesh and drive each other.

[0014] Compared with the prior art, the technical solution provided by this utility model has the following advantages: This utility model is reasonably designed. Through the closed-loop feedback control of pressure sensor, electronic proportional valve and controller, it can compensate for pressure changes caused by the drop in liquid level in quartz crucible in real time and automatically. It ensures that the air pressure acting on the surface of alloy liquid is highly stable throughout the entire spinning process. The constant pressure ensures the stability and uniformity of alloy liquid flow, which greatly improves the product qualification rate and consistency. Moreover, it does not require manual intervention by staff, which reduces labor intensity and operation difficulty. Installing a pressure stabilizing tank on the air inlet pipe can buffer minor fluctuations in air pressure, providing a more stable air pressure environment for the quartz crucible.

[0015] By setting up a second motor, a drive wheel, and a driven wheel, the discharge pipe can be rotated, making it convenient to discharge materials into different loading areas inside the collection bucket.

[0016] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, since they do not involve the design points and improvement directions of this utility model, and will not be elaborated here. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the furnace body of this utility model; Figure 3 This is a cross-sectional view of the air intake pipe of this utility model; Figure 4This is a schematic diagram of the rotating assembly of the discharge pipe of this utility model.

[0018] Figure label: 1. Furnace body; 2. Melting chamber; 3. Quartz crucible; 4. Belt spinning chamber; 5. Feed hopper; 6. Air inlet pipe; 7. Pressure sensor; 8. Electrically controlled proportional valve; 9. Pressure stabilizing tank; 10. First motor; 11. Cooling roller; 12. Discharge port; 13. Collection bucket; 14. Baffle plate; 15. Discharge pipe; 16. Second motor; 17. Drive wheel; 18. Driven wheel. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0020] In the description of this utility model, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating relative importance, quantity, or order. "A plurality of" means two or more, unless otherwise explicitly specified. Example

[0021] Reference Figures 1-3 This utility model discloses a vacuum rapid quenching furnace with automatic constant pressure protection, including a furnace body 1, a melting chamber 2 located at the top inside the furnace body 1, a quartz crucible 3 located below the melting chamber 2, a belt-spinning chamber 4 located below the quartz crucible 3, and a feeding hopper 5 located at the top of the furnace body 1 that directly connects to the melting chamber 2.

[0022] The furnace body 1 has a penetrating air inlet pipe 6 at the top, and the bottom end of the air inlet pipe 6 is directly connected to the top of the quartz crucible 3. One end of the air inlet pipe 6 is exposed outside the furnace body 1 and connected to the gas source. The air inlet pipe 6 allows inert gas to pass directly into the quartz crucible 3 and enter from above the crucible, applying pressure to the liquid inside the quartz crucible 3.

[0023] In this embodiment, the air intake pipe 6 is equipped with a pressure sensor 7 and an electronically controlled proportional valve 8. The electronically controlled proportional valve 8 is located near the air source to facilitate more direct control of the gas flow rate in the furnace cavity.

[0024] In this embodiment, a pressure stabilizing tank 9 is provided on the top of the furnace body 1. The pressure stabilizing tank 9 is installed on the air inlet pipe 6 and communicates with the air passage. It should be noted that the pressure stabilizing tank 9 plays a role in stabilizing the gas in the pipe, which can buffer the small fluctuations in gas pressure, absorb the pressure pulsation in the air inlet pipe 6, and provide a more stable gas pressure environment for the quartz crucible 3.

[0025] This equipment can control the flow rate of gas in the pipeline by installing an electronically controlled proportional valve 8 on the air inlet pipeline 6, and can balance the pressure fluctuations of the gas in the pipeline by using a pressure stabilizing tank 9 to maintain the stable operation of the system.

[0026] A molten material channel is provided between the melting chamber 2 and the quartz crucible 3. The melting chamber 2 is used to melt the metal raw materials, and the molten alloy liquid enters the quartz crucible 3 through the molten material channel. The bottom of the quartz crucible 3 has a liquid outlet for spraying liquid into the strip-throwing chamber 4 below.

[0027] A cooling roller 11 is installed inside the spinning chamber 4. A first motor 10 is fixedly installed on the outer wall of the furnace body 1 at the position of the spinning chamber 4. The output end of the first motor 10 drives the cooling roller 11. The cooling roller 11 rotates at high speed driven by the first motor 10. Since the metal roller conducts heat extremely quickly, the molten alloy liquid in the quartz crucible 3 is sprayed out from the liquid outlet and sprayed onto the cooling roller 11. With the high-speed rotation of the cooling roller 11, the alloy liquid is rapidly cooled when it comes into contact with the cooling roller 11, and instantly solidifies into a solid and is spun out as a thin strip.

[0028] A discharge port 12 is provided at one end of the bottom of the furnace body 1, and the discharge port 12 is located below the cooling roller 11. In addition, a collection bucket 13 is provided on the lower outside of the furnace body 1, and the discharge port 12 is connected to the collection bucket 13. The solidified thin strip will naturally detach from the surface of the cooling roller 11 due to its own centrifugal force and rigidity, and then be guided into the collection bucket 13.

[0029] Furthermore, to prevent materials from accumulating in the center of the collection bin as they fall, in this embodiment, multiple partitions 14 are provided inside the collection bin 13, such as... Figure 1 As shown, the collection bucket 13 is divided into multiple independent loading areas by partitions 14, which allows each loading area to be loaded in a dispersed manner.

[0030] Furthermore, to ensure that each loading zone within the collection bin receives material evenly, in this embodiment, reference is made to... Figure 4 A discharge pipe 15 is rotatably connected to the bottom of the discharge port 12, and a rotating assembly is provided on the outside of the discharge pipe 15. The rotating assembly includes a second motor 16 fixedly installed at the bottom of the furnace body 1, with a drive wheel 17 connected to the output end of the second motor 16, and a driven wheel 18 installed on the outside of the discharge pipe 15, with the drive wheel 17 meshing with the driven wheel 18. The discharge pipe 15 is a pipe with a certain inclination angle at its end to the discharge port 12. By starting the second motor 16, the drive wheel 17 is driven to rotate. The meshing of the drive wheel 17 and the driven wheel 18 drives the driven wheel 18 to rotate, and the driven wheel 18 drives the discharge pipe 15 to rotate. When the discharge pipe 15 rotates, the position of the discharge port is changed, and the thin strip can be placed in different loading areas.

[0031] In the operation of this invention, the alloy raw material is injected into the melting chamber 2 through the feed hopper 5. The alloy material melts in the melting chamber 2, and the molten alloy flows into the quartz crucible 3. The operator can preset the target pressure value in the crucible, and the controller starts working. The pressure sensor 7 continuously monitors the actual pressure and feeds it back to the controller. The controller analyzes the target value and gives a signal to control the opening of the electronic proportional valve 8. Through continuous and rapid fine-tuning, the actual value is always kept at the target pressure value. Driven by gas pressure, the molten alloy is pushed downward and squeezed out from the discharge port. The squeezed alloy is directly sprayed onto the surface of the cooling roller 11. Because the cooling roller 11 is rotated at the starting height of the first motor 10 and conducts heat very quickly, the alloy is rapidly cooled and solidified when it comes into contact with the cooling roller 11. The solidified strip will naturally detach from the surface of the cooling roller 11 due to its own centrifugal force and rigidity. Subsequently, the alloy strip will be guided from the discharge pipe 15 into the collection bucket 13. By starting the second motor 16, the driving wheel 17 is driven to rotate. The driving wheel 17 meshes with the driven wheel 18, thereby driving the driven wheel 18 to rotate. The driven wheel 18 drives the discharge pipe 15 to rotate, thereby changing the discharge position of the discharge pipe 15 and placing the thin strip in different loading areas.

[0032] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A vacuum rapid quenching furnace with automatic constant pressure protection, characterized in that: The furnace includes a furnace body (1), a melting chamber (2) is provided above the furnace body (1), a quartz crucible (3) is provided below the melting chamber (2), a liquid outlet is provided at the bottom of the quartz crucible (3), and a strip-throwing chamber (4) is provided below the quartz crucible (3). The furnace body (1) is provided with a feeding hopper (5) and an air inlet pipe (6) at the top. The feeding hopper (5) is connected to the melting chamber (2), and the air inlet pipe (6) is connected to the top of the quartz crucible (3). The air inlet pipe (6) is provided with a pressure sensor (7) and an electronically controlled proportional valve (8).

2. The vacuum rapid quenching furnace with automatic constant pressure protection according to claim 1, characterized in that: The furnace body (1) is equipped with a pressure stabilizing tank (9) at the top, and the pressure stabilizing tank (9) is connected to the air inlet pipe (6).

3. The vacuum rapid quenching furnace with automatic constant pressure protection according to claim 1 or 2, characterized in that: The outer end of the air intake pipe (6) is connected to the air source, and the electronically controlled proportional valve (8) is installed near the air source.

4. The vacuum rapid quenching furnace with automatic constant pressure protection according to claim 1, characterized in that: A first motor (10) is fixedly installed on the outside of the furnace body (1) at the position of the spinning chamber (4). The output end of the first motor (10) is connected to a cooling roller (11), which is located in the spinning chamber (4).

5. The vacuum rapid quenching furnace with automatic constant pressure protection according to claim 1, characterized in that: The furnace body (1) has a discharge port (12) at the bottom, and a collection bucket (13) is provided below the discharge port (12).

6. The vacuum rapid quenching furnace with automatic constant pressure protection according to claim 5, characterized in that: The collection bucket (13) is provided with multiple partitions (14) inside, which divide the inside of the collection bucket (13) into multiple independent loading areas.

7. The vacuum rapid quenching furnace with automatic constant pressure protection according to claim 6, characterized in that: The bottom of the discharge port (12) is rotatably connected to a discharge pipe (15), and a rotating component is provided on the outside of the discharge pipe (15). When the discharge pipe (15) rotates, it faces different areas inside the collection bucket (13).

8. The vacuum rapid quenching furnace with automatic constant pressure protection according to claim 7, characterized in that: The rotating assembly includes a second motor (16) fixedly installed at one end of the bottom of the furnace body (1). The output end of the second motor (16) is connected to a drive wheel (17). A driven wheel (18) is fitted on the outside of the discharge pipe (15). The drive wheel (17) and the driven wheel (18) mesh and drive each other.

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