Vacuum single roll casting machine with long distance nozzle

Abstract

The utility model belongs to vacuum single roll fling belt machine field relates to a vacuum single roll fling belt machine with long -range nozzle can reduce smelting crucible to cause the heat radiation influence to copper roll, improve experiment accuracy. Technical scheme includes: vacuum chamber, pressure component, smelting crucible, nozzle and copper roll. The pressure component sets up in vacuum chamber, the piston of pressure component sets up in vacuum chamber, and the piston has the tendency of reciprocating operation in vertical direction. The lower end of smelting crucible is provided with an outlet, and the outer side of the smelting crucible is provided with a first high-frequency coil. The nozzle is a pipe with open ends, the outer side of the nozzle is provided with a second high-frequency coil, the upper end of the nozzle is in communication with the lower end of the smelting crucible, and the nozzle is vertically arranged, the length of the nozzle in the vertical direction is greater than 10 cm. The lower end of the nozzle is provided with a copper roller, and the copper roller has a tendency to rotate around its center line.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum single-roller belt spinning machine, and relates to a vacuum single-roller belt spinning machine with a long-distance nozzle. Background Technology

[0002] A vacuum single-roller tape spinning machine sprays molten alloy onto a high-speed rotating copper roller, rapidly cooling the molten alloy to form a strip-shaped amorphous alloy. Vacuum single-roller tape spinning machines play a crucial role in the research and experimentation of amorphous ribbon materials.

[0003] In practical use, the alloy is heated to a molten state by electromagnetic induction in a high-vacuum environment using a high-frequency coil. The molten alloy is stored in a crucible, and over a long period of use, the molten alloy heats the crucible, causing the outer surface temperature to gradually increase.

[0004] The copper roller is typically kept at a low surface temperature using a coolant. However, the crucible is usually located close to the copper roller, and its temperature radiation reaches the roller. This necessitates increasing the coolant volume and flow rate to maintain the roller's low temperature, but also makes controlling the roller's surface temperature difficult. During the experiment, the crucible surface temperature gradually increases. Maintaining a constant roller surface temperature by controlling the coolant volume and flow rate places extremely high demands on the coolant circulation pump. Overall, the temperature of the copper roller used for preparing amorphous ribbons was not stable enough during the experiment, negatively impacting the experimental results. Utility Model Content

[0005] To overcome the shortcomings of the aforementioned related technologies, this utility model proposes a vacuum single-roller belt spinning machine with a long-distance nozzle, which can reduce the thermal radiation effect of the smelting crucible on the copper roller and improve the accuracy of the experiment.

[0006] To achieve the above technical objectives, this utility model provides a vacuum single-roller belt spinning machine with a long-distance nozzle. The vacuum single-roller belt spinning machine with a long-distance nozzle includes: a vacuum chamber, a pressure component, a melting crucible, a nozzle, and a copper roller. The pressure component is disposed on the vacuum chamber, and its piston is disposed within the vacuum chamber, with the piston tending to reciprocate vertically. An outlet is provided at the lower end of the melting crucible, and a first high-frequency coil is disposed on the outer side of the melting crucible. The nozzle is a tube open at both ends, and a second high-frequency coil is disposed on the outer side of the nozzle. The upper end of the nozzle communicates with the lower end of the melting crucible, and the nozzle is vertically positioned, with a vertical length greater than 10 cm. A copper roller is disposed at the lower end of the nozzle, and the copper roller tends to rotate around its centerline.

[0007] Preferably, the nozzle comprises: a temperature measuring tube, a feeding tube, and a high-temperature thermocouple. The temperature measuring tube is a tubular component. The feeding tube is a tapered tube with an upper diameter larger than its lower diameter. The upper end of the feeding tube is connected to the outlet of the melting crucible. The temperature measuring tube is arranged parallel to the feeding tube and is connected to the feeding tube through its side wall. The length of the feeding tube is greater than 10 cm. The sensing section of the high-temperature thermocouple is disposed inside the temperature measuring tube, and the high-temperature thermocouple is sealed to the wall of the temperature measuring tube.

[0008] Preferably, the vacuum single-roller belt spinning machine with a long-distance nozzle further includes a control circuit. The control circuit is electrically connected to the first high-frequency coil, the second high-frequency coil, and the high-temperature thermocouple.

[0009] Preferably, the vacuum single-roller belt spinning machine with a long-distance nozzle further includes a vacuum system. The vacuum system is connected to the vacuum chamber and is electrically connected to the control circuit.

[0010] Preferably, the pressure member further includes a retainer. The retainer is fixedly disposed within the vacuum chamber and is configured to secure the melting crucible.

[0011] The beneficial effects of this utility model are as follows: This utility model uses a nozzle, which can increase the distance between the melting crucible and the copper roller, reduce the transfer of surface heat from the melting crucible to the copper roller, reduce the negative impact of the melting crucible on the copper roller, improve the stability of the surface temperature of the copper roller, reduce the error in the preparation of amorphous ribbon, and improve the accuracy of the experiment.

[0012] This invention uses a temperature measuring tube and a high-temperature thermocouple to detect the internal temperature of the nozzle before the melting crucible is put into operation, thereby preventing the nozzle from being blocked by alloy and preventing accidents during the operation of the melting crucible. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural diagram of the present invention;

[0015] Figure 2 This is another structural diagram of the present invention;

[0016] Figure 3 This is a cross-sectional view of the nozzle of this utility model. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] like Figure 1 As shown, some embodiments of this utility model provide a vacuum single-roller belt spinning machine with a long-distance nozzle 4. The vacuum single-roller belt spinning machine with a long-distance nozzle 4 includes: a vacuum chamber 1, a pressure component 2, a melting crucible 3, a nozzle 4, and a copper roller 5. The pressure component 2 is disposed on the vacuum chamber 1, and the piston of the pressure component 2 is disposed inside the vacuum chamber 1, and the piston has a tendency to reciprocate in the vertical direction. The melting crucible 3 has an outlet at its lower end, and a first high-frequency coil 31 is disposed on the outside of the melting crucible 3. The nozzle 4 is a tube open at both ends, and a second high-frequency coil 44 is disposed on the outside of the nozzle 4. The upper end of the nozzle 4 communicates with the lower end of the melting crucible 3, and the nozzle 4 is vertically arranged, with a vertical length greater than 10 cm. A copper roller 5 is disposed at the lower end of the nozzle 4, and the copper roller 5 has a tendency to rotate around its center line.

[0021] In some examples, vacuum chamber 1 can be a square box made of stainless steel, with a sealed door on one side. An observation window, which can be made of tempered glass, can also be provided on the side wall of vacuum chamber 1.

[0022] like Figure 2 and Figure 3 As shown, in this utility model, the melting crucible 3 can be a tube with a uniform inner diameter, which facilitates the insertion of the piston of the pressure component 2 into the melting crucible 3 and extrudes the molten alloy inside the melting crucible 3.

[0023] After the molten alloy passes through the outlet of the melting crucible 3 and enters the nozzle 4, it is injected from the lower end of the nozzle 4 onto the surface of the copper roller 5 to form an amorphous alloy strip.

[0024] Among them, the nozzle 4 can be integrally formed with the melting crucible 3.

[0025] Furthermore, the melting crucible 3 can be removed from the vacuum chamber 1, and a heated alloy block can be added to it, wherein a portion of small alloy particles needs to be filled into the nozzle 4. The melting crucible 3 is then installed back into the vacuum chamber 1, with the piston of the pressure member 2 positioned directly above or inside the melting crucible 3.

[0026] Before the equipment is started, the second high-frequency coil 44 runs until the alloy inside the nozzle 4 is molten, and the vacuum chamber 1 is kept in a vacuum state. Then the first high-frequency coil 31 is started to molten the alloy inside the melting crucible 3. When the alloy inside the melting crucible 3 is molten, the second high-frequency coil 44 stops running.

[0027] The pressure component 2 is activated to spray the alloy in the melting crucible 3 onto the copper roller 5. It should be noted that the initially formed amorphous alloy strip on the copper roller 5 should be removed. In addition, compared with the case without nozzle 4, the alloy heating temperature in the melting crucible 3 is 5℃~10℃ higher, to avoid experimental errors caused by the molten alloy cooling down in nozzle 4.

[0028] In some embodiments, the nozzle 4 includes: a temperature measuring tube 41, a feeding tube 42, and a high-temperature thermocouple 43. The temperature measuring tube 41 is a tubular component. The feeding tube 42 is a tapered tube with an upper diameter larger than its lower diameter. The upper end of the feeding tube 42 is connected to the outlet of the melting crucible 3. The temperature measuring tube 41 is arranged parallel to the feeding tube 42 and is connected to the feeding tube 42 through its side wall. The length of the feeding tube 42 is greater than 10 cm. The sensing section of the high-temperature thermocouple 43 is disposed inside the temperature measuring tube 41, and the high-temperature thermocouple 43 is sealed to the wall of the temperature measuring tube 41.

[0029] In some examples, small alloy particles may be present inside nozzle 4, or the alloy from the previous operation may crystallize inside nozzle 4, causing blockage inside nozzle 4. Therefore, before operating a vacuum single-roller belt winch with a long-distance nozzle 4, it is necessary to ensure that the alloy inside nozzle 4 is in a molten state to avoid the inability to remove air from the melting crucible 3 during vacuum operation in vacuum chamber 1, or to prevent the melting crucible 3 from exploding due to thermal expansion during operation.

[0030] The second high-frequency coil 44 is fixed to the outside of the nozzle 4. Specifically, the second high-frequency coil 44 can be made of copper tubing and fixed to the nozzle 4 via ceramic, with the second high-frequency coil 44 20-25mm away from the outer wall of the nozzle 4. The diameter of the uppermost end of the feed tube 42 is less than 30mm. A temperature measuring tube 41 is fixed in the middle of the feed tube 42, and the side wall of the temperature measuring tube 41 is connected to the feed tube 42. It can be understood that the temperature measuring tube 41 and the feed tube 42 are integrally cast. An opening is provided at the upper end of the temperature measuring tube 41, and the high-temperature thermocouple 43 is inserted into the temperature measuring tube 41 through the opening at the upper end of the temperature measuring tube 41. The high-temperature thermocouple 43 and the temperature measuring tube 41 are sealed with refractory material. The part of the high-temperature thermocouple 43 located outside the temperature measuring tube 41 is higher than the second high-frequency coil 44, that is, the second high-frequency coil 44 cannot heat the part of the high-temperature thermocouple 43 located outside the temperature measuring tube 41.

[0031] The feed tube 42 and temperature measuring tube 41 are relatively small in size, resulting in less heat transfer to the copper roller 5. This can improve the stability of the surface temperature of the copper roller 5 and enhance the accuracy of the experiment. In addition, to reduce the heat impact of the feed tube 42 and temperature measuring tube 41 on the copper roller 5, the wall thickness of the feed tube 42 and temperature measuring tube 41 can be increased, while reducing the heat loss of the molten alloy in the nozzle 4 caused by heat transfer from the feed tube 42 and temperature measuring tube 41.

[0032] In some embodiments, the vacuum single-roller belt winch with a long-distance nozzle 4 further includes a control circuit. The control circuit is electrically connected to the first high-frequency coil 31, the second high-frequency coil 44, and the high-temperature thermocouple 43.

[0033] In some examples, the control circuit includes a microprocessor, a first intermediate relay, a second intermediate relay, a first electromagnetic heating controller, and a second electromagnetic heating controller. The microprocessor is electrically connected to the coils of the first and second intermediate relays and the signal terminal of the high-temperature thermocouple 43, respectively. The first high-frequency coil 31 and the first electromagnetic heating controller are connected in series with one end of the contact of the first intermediate relay, and the second high-frequency coil 44 and the second electromagnetic heating controller are connected in series with one end of the contact of the second intermediate relay. The other ends of the contacts of the first and second intermediate relays are connected to a power supply.

[0034] Understandably, the first high-frequency coil 31 can be fixedly installed with the melting crucible 3, and the distance between the first high-frequency coil 31 and the outer wall of the melting crucible 3 is 20~25mm. The control circuit is fixed on the inner wall of the vacuum chamber 1, and the high-temperature thermocouple 43 is electrically connected to the microprocessor through a terminal block. The first high-frequency coil 31 and the first electromagnetic heating controller are electrically connected through a terminal block, and the second high-frequency coil 44 and the second electromagnetic heating controller are electrically connected through a terminal block.

[0035] In this invention, the microprocessor can be a single-chip microcomputer. After the melting crucible 3 and nozzle 4 are installed in the vacuum chamber 1, the corresponding wiring is connected. The microprocessor first closes the contacts of the second intermediate relay, causing the nozzle 4 to heat up until the temperature signal collected by the high-temperature thermocouple 43 reaches the set value, at which point the contacts of the second intermediate relay open. The set value can be the temperature at which the alloy melts. Then, the contacts of the first intermediate relay close, and heating stops when the alloy in the melting crucible 3 is in a molten state (which can be observed through the observation window). Alternatively, a temperature sensor is installed in the melting crucible 3, and heating stops when the set temperature is reached.

[0036] The pressure component 2 may include an electric push rod and a piston. The piston is made of a high-temperature resistant material, such as graphite block. The electric push rod is fixedly connected to the outer shell of the vacuum chamber 1 and is sealed. The electric push rod is fixedly connected to the piston. The electric push rod drives the piston to reciprocate vertically. The piston is used to squeeze the molten alloy in the melting crucible 3 out.

[0037] In some embodiments, the vacuum single-roller belt winch with a long-distance nozzle 4 further includes a vacuum system. The vacuum system is connected to the vacuum chamber 1 and is electrically connected to the control circuit.

[0038] In some examples, the vacuum system includes a vacuum pump connected to a vacuum chamber 1, which is used to evacuate the vacuum chamber 1. Vacuum systems are conventional technology in the art and will not be described in detail here.

[0039] In some embodiments, the pressure member 2 further includes a retainer 6. The retainer 6 is fixedly disposed within the vacuum chamber 1 and is configured to fix the melting crucible 3.

[0040] In some examples, annular protrusions may be provided at the upper end (above the first high-frequency coil 31) and the lower end (below the first high-frequency coil 31 and above the outlet) of the melting crucible 3. The retainer 6 includes a semi-ring adapted to the annular protrusion. The semi-ring is fixedly connected to the vacuum chamber 1. Each semi-ring is hinged with a latch, which is semi-annular. The other end of the latch is provided with a locking buckle to the semi-ring. When the latch is locked with the semi-ring, an annular structure is formed, which can fix the melting crucible 3 to the vacuum chamber 1.

[0041] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0042] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A vacuum single-roller belt spinning machine with a long-distance nozzle, characterized in that, include: Vacuum chamber; A pressure component, disposed on the vacuum chamber, with a piston of the pressure component disposed within the vacuum chamber, and the piston having a tendency to reciprocate in the vertical direction; a melting crucible, with an outlet at its lower end, and a first high-frequency coil disposed on the outer side of the melting crucible; a nozzle, a tube open at both ends, with a second high-frequency coil disposed on the outer side of the nozzle, the upper end of the nozzle communicating with the lower end of the melting crucible, and the nozzle being vertically disposed, with a vertical length greater than 10 cm; and a copper roller, with a copper roller disposed at the lower end of the nozzle, and the copper roller having a tendency to rotate around its center line.

2. The vacuum single-roller belt spinning machine with a long-distance nozzle according to claim 1, characterized in that, The nozzle includes: a temperature measuring tube, which is a pipe fitting; a feeding tube, which is a tapered tube with an upper diameter larger than a lower diameter, the upper end of which is connected to the outlet of the melting crucible; the temperature measuring tube and the feeding tube are arranged side by side and connected to the feeding tube through a side wall; the length of the feeding tube is greater than 10 cm; and a high-temperature thermocouple, the detection section of which is disposed inside the temperature measuring tube, and the high-temperature thermocouple is sealed to the wall of the temperature measuring tube.

3. The vacuum single-roller belt spinning machine with a long-distance nozzle according to claim 2, characterized in that, The vacuum single-roller belt spinning machine with a long-distance nozzle also includes a control circuit; the control circuit is electrically connected to the first high-frequency coil, the second high-frequency coil, and the high-temperature thermocouple.

4. The vacuum single-roller belt spinning machine with a long-distance nozzle according to claim 3, characterized in that, The vacuum single-roller belt spinning machine with a long-distance nozzle also includes a vacuum system; the vacuum system is connected to the vacuum chamber and is electrically connected to the control circuit.

5. The vacuum single-roller belt spinning machine with a long-distance nozzle according to claim 4, characterized in that, The pressure component also includes a retainer; the retainer is fixedly disposed in the vacuum chamber and is configured to fix the melting crucible.

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