Large-volume nanocrystalline ribbon production system

Abstract

The invention discloses a large-capacity nanocrystalline thin strip production system, comprising a frame platform, a walking track is installed on the frame platform, a smelting station and a steel pouring station are arranged on the walking track, a vacuum furnace system that reciprocates between the smelting station and the steel pouring station is slidably installed on the walking track, a nozzle package mechanism corresponding to the vacuum furnace system is arranged at the corresponding steel pouring station below the frame platform, a nozzle package constant liquid level closed-loop control system for controlling the opening and closing amplitude of a water outlet of the vacuum furnace system is electrically connected between the nozzle package mechanism and the vacuum furnace system; a crystallizer is correspondingly installed below the nozzle package mechanism, an automatic belt-taking device is correspondingly installed on the belt outlet side of the crystallizer, an online thickness measuring device is arranged between the crystallizer and the automatic belt-taking device, and a strip thickness constant closed-loop control system for controlling the spacing between the nozzle package mechanism and the crystallizer is electrically connected between the online thickness measuring device and the nozzle package mechanism; the invention has the advantages of simple structure, reasonable design and high production efficiency.

Description

Technical Field

[0001] The invention relates to a nanocrystalline strip production equipment structure, in particular to a large-capacity nanocrystalline thin strip production system. Background Art

[0002] Iron-based nanocrystalline ribbons are known as the most cost-effective soft magnetic materials due to their excellent soft magnetic properties. In particular, nanocrystalline ribbons with a thickness of less than 20um have low eddy current losses and are favored for their excellent high-frequency characteristics. Iron-based nanocrystalline wide bands with a width of more than 60mm are the preferred materials for magnetic shielding and mobile phone wireless charging cores. With the development of science and technology and the improvement of ribbon production processes, the current method for obtaining nanocrystalline ribbons in batches in domestic industry is pressure spraying. Through constant pressure control, the pressure at the nozzle is kept constant, thereby obtaining high-density nanocrystalline ribbons with relatively consistent thickness.

[0003] At present, the more consistent practice of nanocrystalline strip production lines is: after the master alloy is melted and the slag is removed, the molten iron is poured into the nozzle package at one time through the steel casting guide trough; then the nozzle package is sealed and filled with inert gas, a narrow slit nozzle is set at the bottom of the nozzle package, and the high-temperature molten iron in the nozzle package is sprayed through the nozzle slit onto the high-speed rotating cooling crystallizer, and the strip is swung into shape under the action of centrifugal force. Therefore, the nanocrystalline strip spraying machine is also called a strip swinging machine. Since the pressure at the nozzle can be indirectly adjusted to be constant by adjusting the internal air pressure of the nozzle package, so that the density of the strip is uniform, this strip spraying method is called nanocrystalline pressure strip spraying.

[0004] However, due to the limitation of nozzle package volume, the maximum tonnage of iron-based nanocrystalline pressure spray tape does not exceed 200kg at one time. Especially in the mass production of ultra-wide and ultra-thin iron-based nanocrystalline tapes, it is difficult to achieve mass production due to the limitation of nozzle package volume. This has become a bottleneck restricting the large-scale continuous production of iron-based nanocrystalline tapes. It is difficult to make large-capacity nozzle packages, and once cracks and steel leaks appear in large-capacity nozzle packages, it will cause great harm and losses to the staff and production equipment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a large-capacity nanocrystalline thin ribbon production system with simple structure, reasonable design, high production efficiency and the ability to effectively increase the single-shot spraying output of nanocrystalline ribbons.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a large-capacity nanocrystalline thin strip production system, including a frame platform, a walking track is installed on the frame platform, a smelting station and a steel pouring station are arranged on the walking track, a vacuum furnace system that reciprocates between the smelting station and the steel pouring station is slidably installed on the walking track, a nozzle package mechanism corresponding to the vacuum furnace system is arranged below the frame platform corresponding to the steel pouring station, and a nozzle package constant liquid level closed-loop control system for controlling the opening and closing amplitude of the water outlet of the vacuum furnace system is electrically connected between the nozzle package mechanism and the vacuum furnace system; a crystallizer is installed below the nozzle package mechanism, an automatic belt taking-up device is installed on the belt outlet side of the crystallizer, an online thickness measuring device is arranged between the crystallizer and the automatic belt taking-up device, and a strip thickness constant closed-loop control system for controlling the distance between the nozzle package mechanism and the crystallizer is electrically connected between the online thickness measuring device and the nozzle package mechanism.

[0007] As a preferred technical solution, the vacuum furnace system includes a platform frame, a sliding roller is installed at the bottom end of the platform frame, the sliding roller is slidably installed on the walking track, a vacuum furnace body and a vacuum system connected to the vacuum furnace body are installed on the platform frame, and the vacuum system is correspondingly equipped with a vacuum furnace power supply system.

[0008] As a preferred technical solution, a large-capacity smelting furnace is installed in the vacuum furnace body, a side bottom pouring steel device is installed correspondingly on the side of the large-capacity smelting furnace, and a horizontal stopper rod assembly is installed in the side bottom pouring steel device corresponding to the water outlet of the side bottom pouring steel device; the nozzle package constant liquid level closed-loop control system is electrically connected between the nozzle package mechanism and the horizontal stopper rod assembly and controls the horizontal movement of the horizontal stopper rod assembly.

[0009] As a preferred technical solution, a vacuum furnace pouring opening and closing control system for switching between a pouring state and a smelting state for controlling the opening and closing of the horizontal stopper rod assembly is electrically connected between the horizontal stopper rod assembly and the rack platform.

[0010] As a preferred technical solution, the large-capacity smelting furnace includes a furnace body and an induction coil, and a rammed furnace lining is arranged in the induction coil; the vertical outlet end of the side bottom casting steel device is connected to a vertical runner insulation component; the side bottom casting steel device includes a horizontal internal liquid outlet component connected to the inner cavity of the furnace lining, and a right-angled liquid outlet component is sealed and installed on the horizontal internal liquid outlet component; the horizontal plug rod assembly passes through the horizontal section of the right-angled liquid outlet component and is connected to the horizontal internal liquid outlet component, and the vertical outlet end of the right-angled liquid outlet component is connected to the vertical runner insulation component; the free end of the horizontal section of the right-angled liquid outlet component is sealed and sleeved on the liquid outlet end of the horizontal internal liquid outlet component, and the right-angled liquid outlet component is provided with a horizontal flow channel connected to the inner cavity of the horizontal internal liquid outlet component and a vertical flow channel connected to the vertical runner insulation component.

[0011] As a preferred technical solution, a flow limiting platform is provided in the inner cavity of the horizontal inner liquid outlet component, which divides its flow channel into an inner liquid inlet channel and an inner liquid outlet channel, and a flow limiting hole is provided on the flow limiting platform; the horizontal flow channel is connected to the inner liquid outlet channel and the inner diameters of the two flow channels gradually increase along the flow direction of the molten steel; the horizontal plug rod assembly includes a side plug rod whose end passes through the right-angle liquid outlet component and abuts against the flow limiting platform and blocks the flow limiting hole, and the side plug rod is located at the free end outside the right-angle liquid outlet component and is electrically connected to the nozzle package constant liquid level closed-loop control system and the vacuum furnace pouring start and close control system.

[0012] As a preferred technical solution, the vertical runner insulation assembly includes a fixed outer shell fixedly connected to the furnace body, a flow channel lining connected to the vertical outlet end of the side bottom casting steel device is mounted in the fixed outer shell, a vertical runner corresponding to the water inlet of the nozzle package mechanism is arranged in the flow channel lining, an axially extending silicon carbon rod is mounted between the flow channel lining and the fixed outer shell, and an insulation layer is installed between the silicon carbon rod and the fixed outer shell.

[0013] As a preferred technical solution, the nozzle package mechanism includes a nozzle package body and a nozzle package position adjustment mechanism for controlling the distance of the bottom nozzle of the nozzle package body relative to the upper cutting surface of the crystallizer. The strip thickness constant closed-loop control system is electrically connected between the online thickness measuring device and the nozzle package position adjustment mechanism and controls the nozzle package position adjustment mechanism to adjust the distance of the bottom nozzle of the nozzle package body relative to the upper cutting surface of the crystallizer.

[0014] As a preferred technical solution, the nozzle package is a high liquid level nozzle package, a nozzle package float is arranged in the nozzle package, the nozzle package float is floated on the molten iron liquid surface in the nozzle package, the nozzle package constant liquid level closed-loop control system is electrically connected between the nozzle package float and the horizontal plug rod assembly and controls the opening amplitude of the horizontal plug rod assembly according to the liquid level height in the nozzle package; a nozzle package plug rod is detachably installed in the nozzle package corresponding to the water outlet of the nozzle package, a nozzle is installed at the bottom end of the nozzle package corresponding to the water outlet of the nozzle package, and the nozzle corresponds to the crystallizer; an inert gas protection device is arranged at the nozzle package and the water inlet of the nozzle package to prevent the oxidation of the molten steel during the molten iron flow process.

[0015] As a preferred technical solution, a nozzle plugger rod opening and closing control system for controlling the nozzle plugger rod to switch between a belt spraying state and a non-belt spraying state is electrically connected between the nozzle plugger rod and the frame platform.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. Since the vacuum furnace system adopts a large-capacity melting furnace and can be moved forward and backward as a whole, the vacuum furnace system can be directly moved above the nozzle package mechanism, and molten iron can be continuously supplied during the belt spraying, thereby increasing the single belt spraying amount and improving production efficiency;

[0018] 2. The nozzle bag constant liquid level closed-loop control system is used to control the opening and closing amplitude of the water outlet of the vacuum furnace system. When the molten steel in the nozzle bag mechanism is less than the set value, the nozzle bag constant liquid level closed-loop control system will control the water outlet of the vacuum furnace system to increase the opening amplitude, so that the molten steel in the vacuum furnace system will flow into the nozzle bag mechanism; when the molten steel in the nozzle bag mechanism is greater than the set value, the nozzle bag constant liquid level closed-loop control system will control the water outlet of the vacuum furnace system to reduce the opening amplitude, so that the molten steel in the vacuum furnace system slows down or stops flowing into the nozzle bag mechanism, which can effectively maintain the molten steel in the nozzle bag mechanism within the set range, maintain the molten steel level in the nozzle bag structure at a constant value, and maintain the consistency of the strip density.

[0019] 3. The strip thickness constant closed-loop control system is used to control the distance between the nozzle package mechanism and the crystallizer. When the online thickness measuring device measures a deviation between the strip thickness and the set value, it will transmit a signal to the strip thickness constant closed-loop control system. The strip thickness constant closed-loop control system will control the nozzle package mechanism to adjust the distance between the nozzle package mechanism and the crystallizer in real time.

[0020] 4. The side bottom pouring method reduces the length of the molten iron flow channel, reduces the oxidation of molten steel and heat loss during the pouring process, and saves electricity.

[0021] 5. The high liquid level nozzle package increases the spray pressure and the density of the strip;

[0022] 6. The present invention has a simple structure, reasonable design, high production efficiency, and can effectively increase the single-shot spraying output of nanocrystalline strips. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0024] Figure 1 2 is a schematic structural diagram of a vacuum furnace system in a pouring state according to an embodiment of the present invention;

[0025] Figure 2 2 is a schematic structural diagram of a vacuum furnace system in a melting state according to an embodiment of the present invention;

[0026] Figure 3 is a structural cross-sectional view of a large-capacity smelting furnace according to an embodiment of the present invention;

[0027] Figure 4 is a structural diagram of an electric furnace induction coil according to an embodiment of the present invention;

[0028] In the figure: 1-frame platform; 2-walking track; 3-crystallizer; 4-automatic belt take-up device; 5-online thickness measuring device; 6-platform frame; 7-sliding roller; 8-vacuum furnace body; 9-vacuum system; 10-vacuum furnace power supply system; 11-side bottom pouring steel device; 12-nozzle package; 13-nozzle package position adjustment mechanism; 14-nozzle package plug rod; 15-furnace body; 16-furnace lining; 17-induction coil; 18-horizontal internal liquid outlet component; 19-internal liquid inlet flow channel; 20-internal liquid outlet flow channel; 21-current limiting platform; 22-current limiting hole; 23-right-angle liquid outlet component; 24-horizontal flow channel; 25-vertical flow channel; 26-side plug rod; 27-fixed shell; 28-flow channel lining; 29-insulation layer; 30-silicon carbon rod. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0030] like Figure 1 and Figure 2 As shown, a large-capacity nanocrystalline thin ribbon production system includes a frame platform 1, and the frame platform 1 serves as a mounting base of the present embodiment and has a supporting function. A walking track 2 is installed on the frame platform 1, and a smelting station and a steel pouring station are arranged on the walking track 2. A vacuum furnace system that reciprocates between the smelting station and the steel pouring station is slidably installed on the walking track 2. In the present embodiment, the smelting station is located at the rear, and the steel pouring station is located at the front. When smelting is required, the vacuum furnace system moves backward as a whole, and when steel pouring is required, the vacuum furnace system moves forward as a whole, so as to meet the different requirements of the smelting station and the steel pouring station; a nozzle package corresponding to the vacuum furnace system is arranged below the frame platform 1 corresponding to the steel pouring station Mechanism, the nozzle pack mechanism and the vacuum furnace system are electrically connected with a nozzle pack constant liquid level closed-loop control system for controlling the opening and closing amplitude of the water outlet of the vacuum furnace system; a crystallizer 3 is correspondingly installed below the nozzle pack mechanism, and an automatic belt-taking device 4 is correspondingly installed on the belt outlet side of the crystallizer 3, and the automatic belt-taking device 4 realizes automatic belt-taking by negative pressure adsorption; an online thickness measuring device 5 is arranged between the crystallizer 3 and the automatic belt-taking device 4, and the crystallizer 3, the automatic belt-taking device 4, and the online thickness measuring device 5 all belong to the prior art, and the specific structure is not repeated here; a strip thickness constant closed-loop control system for controlling the distance between the nozzle pack mechanism and the crystallizer 3 is electrically connected between the online thickness measuring device 5 and the nozzle pack mechanism.

[0031] In this embodiment, the smelting station is located at the rear and the steel pouring station is located at the front. When smelting is required, the vacuum furnace system moves backward as a whole, and when steel pouring is required, the vacuum furnace system moves forward as a whole, so as to meet the different needs of the smelting station and the steel pouring station. Since the vacuum furnace system can move forward and backward as a whole, the vacuum furnace system can be directly moved to the top of the nozzle package mechanism. Through the large-capacity smelting furnace, molten iron can be continuously supplied during the spraying process, which effectively reduces the distance of the molten iron flow channel, reduces the oxidation of molten steel and heat loss during the steel pouring process, and saves electric energy.

[0032] The nozzle bag constant liquid level closed-loop control system is used to control the opening amplitude of the water outlet of the vacuum furnace system. When the molten steel in the nozzle bag mechanism is less than the set value, the nozzle bag constant liquid level closed-loop control system will control the water outlet of the vacuum furnace system to increase the opening amplitude, so that the molten steel in the vacuum furnace system will flow into the nozzle bag mechanism; when the molten steel in the nozzle bag mechanism is greater than the set value, the nozzle bag constant liquid level closed-loop control system will control the water outlet of the vacuum furnace system to reduce the opening amplitude, so that the molten steel in the vacuum furnace system reduces or stops flowing into the nozzle bag mechanism, which can effectively maintain the molten steel in the nozzle bag mechanism within the set range, maintain the molten steel level in the nozzle bag mechanism at a constant value, and maintain the consistency of the strip.

[0033] The strip thickness constant closed-loop control system is used to control the distance between the nozzle package mechanism and the crystallizer 3. When the online thickness measuring device 5 measures a deviation between the strip thickness and the set value, it will transmit a signal to the strip thickness constant closed-loop control system, and the strip thickness constant closed-loop control system will control the nozzle package mechanism to adjust the distance between the nozzle package mechanism and the crystallizer 3 in real time.

[0034] The vacuum furnace system includes a platform frame 6, a sliding roller 7 is installed at the bottom end of the platform frame 6, and the sliding roller 7 is slidably installed on the walking track 2 to realize the reciprocating motion of the vacuum furnace system. A vacuum furnace body 8 and a vacuum system 9 connected to the vacuum furnace body 8 are installed on the platform frame 6, and the vacuum system 9 is correspondingly equipped with a vacuum furnace power supply system 10. The vacuum system 9 and the vacuum furnace power supply system 10 are both existing technologies and are not described in detail here.

[0035] A large-capacity melting furnace is installed in the vacuum furnace body 8. By adopting a large-capacity melting furnace, the single molten iron supply of the nanocrystalline strip production line is increased, that is, the single spraying strip output of the nanocrystalline strip production line is increased, and the production efficiency is improved. A side bottom steel pouring device 11 is installed corresponding to the side of the large-capacity melting furnace, and a horizontal plug rod assembly is installed in the side bottom steel pouring device 11 corresponding to the water outlet of the side bottom steel pouring device 11; in this embodiment, the side bottom steel pouring method is performed by setting the side bottom steel pouring device 11. Compared with the tilting steel pouring method in the prior art, since the furnace body does not need to be tilted when pouring steel in this embodiment, the furnace body occupies a small space and saves space. At the same time, the side bottom steel pouring method reduces the length of the molten iron flow channel and reduces the oxidation and burning of the molten steel; the nozzle bag constant liquid level closed-loop control system is electrically connected between the nozzle bag mechanism and the horizontal plug rod assembly and controls the horizontal movement of the horizontal plug rod assembly.

[0036] See also Figure 3The large-capacity smelting furnace includes a furnace body 15, in which an induction coil 17 is installed, and a rammed furnace lining 16 is arranged in the induction coil 17; the vertical outlet end of the side bottom casting steel device 11 is connected to a vertical runner insulation component; the side bottom casting steel device 11 includes a horizontal internal liquid outlet component 18 connected to the inner cavity of the furnace lining 16, and a right-angle liquid outlet component 23 is sealed and installed on the horizontal internal liquid outlet component 18; the horizontal plug rod assembly passes through the horizontal section of the right-angle liquid outlet component 23 and is connected to the horizontal internal liquid outlet component 18, and the vertical outlet end of the right-angle liquid outlet component 23 is connected to the vertical runner insulation component; the free end of the horizontal section of the right-angle liquid outlet component 23 is sealed and sleeved on the liquid outlet end of the horizontal internal liquid outlet component 18, and the right-angle liquid outlet component 23 is provided with a horizontal flow channel 24 connected to the inner cavity of the horizontal internal liquid outlet component 18 and a vertical flow channel 25 connected to the vertical runner insulation component.

[0037] The inner cavity of the horizontal inner liquid outlet component 18 is provided with a flow limiting platform 21 which divides its flow channel into an inner liquid inlet channel 19 and an inner liquid outlet channel 20, and a flow limiting hole 22 is provided on the flow limiting platform 21; the horizontal flow channel 24 is connected with the inner liquid outlet channel 20 and the inner diameters of the two flow channels gradually increase along the flow direction of the molten steel; the horizontal plug rod assembly includes a side plug rod 26 whose end passes through the right-angle liquid outlet component 23 and abuts against the flow limiting platform 21 and blocks the flow limiting hole 22, and the side plug rod 26 is located at the free end outside the right-angle liquid outlet component 23 and is electrically connected to the nozzle package constant liquid level closed-loop control system.

[0038] The vertical runner insulation assembly includes a fixed housing 27 fixedly connected to the furnace body 15. Figure 4 As shown, the fixed shell 27 is provided with a flow channel lining 28 connected to the vertical outlet end of the side bottom casting steel device, and the flow channel lining 28 is provided with a vertical runner corresponding to the water inlet of the nozzle package mechanism, and an axially extending silicon carbon rod 30 is provided between the flow channel lining 28 and the fixed shell 27, and the silicon carbon rod 30 is set as a double-threaded silicon carbon rod, and an insulation layer 29 is installed between the silicon carbon rod 30 and the fixed shell 27.

[0039] The large-capacity melting furnace controls steel pouring by opening and closing the side plug rod 26. When steel pouring is required, the melting furnace only needs to be moved to the upper part of the nozzle package mechanism through the track, aligned with the water inlet of the nozzle package mechanism for steel pouring, and the side plug rod 26 is opened to pour steel. This type of electric furnace structure organically integrates melting, heat preservation and steel pouring control, avoids heat loss during the transfer of molten steel, and simplifies operation. The flow rate of molten steel is controllable, and the side plug rod 26 can be opened and closed in time according to requirements, and the flow rate of molten steel can be adjusted according to requirements to avoid overflow and waste of molten steel. The nozzle package mechanism includes a nozzle package body 12 and a nozzle package position adjustment mechanism 13 for controlling the distance of the bottom nozzle of the nozzle package body 12 relative to the upper section of the crystallizer 3. The nozzle package position adjustment mechanism 13 is a three-dimensional adjustment structure with front-to-back, up-down, left-to-right and front-to-back inclination adjustment. Its specific mechanism belongs to the prior art and will not be repeated here. The strip thickness constant closed-loop control system is electrically connected between the online thickness measuring device 5 and the nozzle package position adjustment mechanism 13 and controls the nozzle package position adjustment mechanism 13 to adjust the distance of the bottom nozzle of the nozzle package body 12 relative to the upper section of the crystallizer 3. The online thickness measuring device 5 is used to monitor the strip thickness and deviation online, and transmit the signal to the strip thickness constant closed-loop control system. When the online thickness measuring device 5 measures that there is a deviation between the strip thickness and the set value, and transmits the signal to the strip thickness constant closed-loop control system, the strip thickness constant closed-loop control system will control the nozzle package position adjustment mechanism 13, and the nozzle package position adjustment mechanism 13 will drive the nozzle package body 12 to move forward and backward, up and down, left and right, and forward and backward inclination angle to adjust the distance between the water outlet of the nozzle package body 12 and the water inlet of the crystallizer 3, until the strip thickness and deviation monitored by the online thickness measuring device 5 meet the use requirements, the strip thickness constant closed-loop control system will control the nozzle package position adjustment mechanism 13 to stop.

[0040] In order to ensure the high density of the nanocrystalline strip, the nozzle package 12 is a high liquid level nozzle package, which adopts a high liquid level spray belt method to increase the spray belt pressure and the strip density. At the same time, the nozzle package 12 and the water inlet of the nozzle package 12 are also provided with an inert gas protection device to prevent the oxidation of the molten steel during the molten iron continuous flow process to prevent the surface oxidation of the molten iron. The inert gas protection device belongs to the prior art and is not described here. It is not shown in the figure; a nozzle package float is provided in the nozzle package 12, and the nozzle package float floats on the molten steel liquid surface in the nozzle package 12. The nozzle package constant liquid level closed-loop control system is electrically connected between the nozzle package float and the horizontal plug rod assembly, and controls the opening amplitude of the horizontal plug rod assembly according to the liquid level height in the nozzle package 12, that is, the nozzle package constant liquid level closed-loop control system is electrically connected between the nozzle package float and the side plug rod 26 and controls the horizontal movement of the side plug rod 26. The nozzle package float is set as a float type liquid level sensor for monitoring the The liquid level in the nozzle package 12 is measured, and the height signal is fed back to the nozzle package constant liquid level closed-loop control system to form a closed-loop feedback control with the side plug rod 26. When the monitored liquid level in the nozzle package 12 is greater than the set value, the nozzle package constant liquid level closed-loop control system controls the side plug rod 26 to block the flow-limiting hole 22 or reduce the opening amplitude. At this time, the molten steel flow rate at the outlet of the vacuum furnace body 8 is reduced, and the molten iron in the vacuum furnace body 8 is reduced to the nozzle through the outlet of the vacuum furnace body 8. The liquid flows into the nozzle package 12. When the liquid level in the nozzle package 12 monitored is less than the set value, the nozzle package constant liquid level closed-loop control system controls the side plug rod 26 to increase the opening amplitude. At this time, the molten iron flow rate of the outlet of the vacuum furnace body 8 increases, and the molten iron in the vacuum furnace body 8 flows into the nozzle package 12 through the outlet of the vacuum furnace body 8, providing molten iron stably in the nozzle package 12, maintaining the liquid level of the nozzle package 12 constant, achieving constant pressure spraying, and maintaining the consistency of the strip. The nozzle package float can of course be replaced by other sensors with liquid level measurement function, or other devices with specific liquid level measurement function and capable of transmitting liquid level height change signals to. The nozzle package plug rod 14 is detachably installed in the nozzle package 12 corresponding to the outlet of the nozzle package 12, and a nozzle is installed at the bottom of the nozzle package 12 corresponding to the outlet of the nozzle package 12, and the nozzle corresponds to the crystallizer 3.

[0041] Since the vacuum furnace system will be in the two steel pouring stations and the melting station, and the working principles and states at the two stations are different, a vacuum furnace pouring start and close control system for controlling the horizontal stopper rod assembly to switch between the pouring state and the melting state is electrically connected between the horizontal stopper rod assembly and the frame platform 1, and the free end of the side stopper rod 26 located outside the right-angle liquid outflow component 23 is also electrically connected to the vacuum furnace pouring start and close control system. When the vacuum furnace system is in the smelting state at the smelting station, the vacuum furnace pouring opening and closing control system will control the nozzle package constant liquid level closed-loop control system and the strip thickness constant closed-loop control system to stop working. At this time, the horizontal plug rod assembly is always in a closed state, and the water outlet of the side bottom pouring steel device 11 is always kept in a closed state, and the molten steel in the vacuum furnace body 8 will not flow out; and when the vacuum furnace system is switched to the pouring state at the steel pouring station, the vacuum furnace pouring opening and closing control system will control the nozzle package constant liquid level closed-loop control system and the strip thickness constant closed-loop control system to start working, and the nozzle package constant liquid level closed-loop control system will control the movement of the horizontal plug rod assembly in real time, thereby implementing the control of the opening and closing state of the water outlet of the side bottom pouring steel device 11, and adjusting the molten iron flow rate by the opening and closing amplitude of the side plug rod 26 to adjust the molten iron level in the nozzle package 12 to maintain a constant height. Similarly, the strip thickness constant closed-loop control system will control the nozzle package position adjustment mechanism 13 in real time to adjust the distance between the bottom nozzle of the nozzle package 12 and the upper section of the crystallizer 3 in real time.

[0042] Similarly, since the vacuum furnace system will be in the two steel casting stations and smelting stations, and the working principles and states at the two stations are different, a nozzle plug rod opening and closing control system for controlling the nozzle plug rod 14 to switch between the spraying state and the non-spraying state is electrically connected between the nozzle plug rod 14 and the frame platform 1; the nozzle plug rod 14 opening and closing control system is also connected to the nozzle pack float and controls the rise and fall of the nozzle plug rod 14. When the vacuum furnace system is in the smelting station, the nozzle bag plug rod opening and closing control system will control the nozzle bag constant liquid level closed-loop control system and the strip thickness constant closed-loop control system to stop working. At the same time, when the nozzle bag float monitors that the liquid level is less than the set value, the nozzle bag plug rod opening and closing control system will control the nozzle bag plug rod 14 to descend and keep it in a descending state, so that the water outlet of the nozzle bag 12 is always kept in a closed state, and the molten steel in the nozzle bag 12 will not flow out. At this time, the nozzle bag 12 is insulated and the nozzle can be replaced; when switching to the steel casting station, the nozzle bag plug rod opening and closing control system first controls the nozzle bag constant liquid level closed-loop control system, raises the molten steel level in the nozzle bag 12 to the spray belt level, opens the nozzle bag plug rod 14 to continue spraying the belt, and then controls the strip thickness constant closed-loop control system to work normally.

[0043] In this embodiment, a general automatic control system is arranged on the frame platform 1, and the vacuum furnace system, the nozzle pack mechanism, the nozzle pack constant liquid level closed-loop control system, the crystallizer 3, the automatic belt taking-up device 4, the online thickness measuring device 5, the strip thickness constant closed-loop control system, the vacuum furnace pouring start-and-stop control system, and the nozzle pack plug rod start-and-stop control system are all electrically connected to the general automatic control system; the general automatic control system realizes the full automatic operation of this embodiment, which saves time and effort and is easy to operate.

[0044] The specific working steps of this embodiment are as follows:

[0045] Step 1: See Figure 2 First, the vacuum furnace system melts the master alloy at the smelting station, removes the slag after vacuuming, and obtains the purified alloy steel liquid;

[0046] Step 2: Then the vacuum furnace system containing the alloy steel liquid is moved to the steel pouring station through the walking track 2, see Figure 1 ;

[0047] Step 3: Open the side plug rod 26, slowly pour the molten steel in the vacuum furnace body 8 into the nozzle package 12 (the nozzle package plug rod 14 is in a closed state at this time), and establish a certain height liquid level, and then close the side plug rod 26;

[0048] Step 4: After receiving the steel pouring command from the spray belt worker, the nozzle package plug rod 14 is opened and the spray belt starts; thereafter, the side plug rod 26 is opened, and the opening amplitude of the side plug rod 26 is adjusted in real time according to the monitoring data of the nozzle package float to maintain a constant liquid level;

[0049] Step 5: Monitor the strip thickness and deviation through the online thickness measuring device 5, adjust the front-to-back, up-down, left-to-right and front-to-back tilt control of the nozzle package 12 through the nozzle package position adjustment mechanism 13, and adjust the distance between the bottom nozzle of the nozzle package 12 and the crystallizer 3 in real time;

[0050] Step 6: After the vacuum furnace body 8 is finished pouring steel, the side plug rod 26 is closed; the vacuum furnace system returns to the smelting station to continue smelting, see Figure 2 ;

[0051] Step seven: After the liquid level in the nozzle package 12 is lower than the lowest set liquid level of the spray belt, the nozzle package plug rod 14 is closed, and the nozzle package 12 is kept warm. At this time, the nozzle can be replaced; when pouring steel again, the molten steel level in the nozzle package 12 is raised to the spray belt level, and the nozzle package plug rod 14 is opened to continue the spray belt, and a cyclic reciprocating operation begins.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A large-capacity nanocrystalline ribbon production system, including a rack platform, characterized by: A walking track is installed on the frame platform, a smelting station and a steel pouring station are arranged on the walking track, a vacuum furnace system that reciprocates between the smelting station and the steel pouring station is slidably installed on the walking track, a nozzle package mechanism corresponding to the vacuum furnace system is arranged below the frame platform corresponding to the steel pouring station, and a nozzle package constant liquid level closed-loop control system for controlling the opening and closing amplitude of the water outlet of the vacuum furnace system is electrically connected between the nozzle package mechanism and the vacuum furnace system; a crystallizer is correspondingly installed below the nozzle package mechanism, an automatic belt-taking device is correspondingly installed on the strip outlet side of the crystallizer, an online thickness measuring device is arranged between the crystallizer and the automatic belt-taking device, and a strip thickness constant closed-loop control system for controlling the distance between the nozzle package mechanism and the crystallizer is electrically connected between the online thickness measuring device and the nozzle package mechanism; A large-capacity smelting furnace is installed in the vacuum furnace body, a side bottom steel pouring device is installed correspondingly on the side of the large-capacity smelting furnace, and a horizontal stopper rod assembly is installed in the side bottom steel pouring device corresponding to the water outlet of the side bottom steel pouring device; the nozzle package constant liquid level closed-loop control system is electrically connected between the nozzle package mechanism and the horizontal stopper rod assembly and controls the horizontal movement of the horizontal stopper rod assembly; a vacuum furnace pouring opening and closing control system for switching between a pouring state and a smelting state and controlling the opening and closing of the horizontal stopper rod assembly is electrically connected between the horizontal stopper rod assembly and the rack platform; The large-capacity smelting furnace comprises a furnace body and an induction coil, wherein a rammed furnace lining is arranged in the induction coil; the vertical outlet end of the side bottom pouring steel device is connected to a vertical runner insulation component; the side bottom pouring steel device comprises a horizontal inner liquid outlet component connected to the inner cavity of the furnace lining, and a right-angled liquid outlet component is sealed and installed on the horizontal inner liquid outlet component; the horizontal plug rod component passes through the horizontal section of the right-angled liquid outlet component and is connected to the horizontal inner liquid outlet component, and the vertical outlet end of the right-angled liquid outlet component is connected to the vertical runner insulation component; the free end of the horizontal section of the right-angled liquid outlet component is sealed and sleeved on the liquid outlet end of the horizontal inner liquid outlet component, and the right-angled liquid outlet component is provided with a horizontal flow channel connected to the inner cavity of the horizontal inner liquid outlet component and a vertical flow channel connected to the vertical runner insulation component; The inner cavity of the horizontal inner liquid outlet component is provided with a flow limiting platform which divides its flow channel into an inner liquid inlet flow channel and an inner liquid outlet flow channel, and a flow limiting hole is provided on the flow limiting platform; the horizontal flow channel is connected with the inner liquid outlet flow channel and the inner diameters of the two flow channels gradually increase along the flow direction of the molten steel; the horizontal plug rod assembly includes a side plug rod whose end passes through the right-angle liquid outlet component and abuts against the flow limiting platform and blocks the flow limiting hole, the side plug rod is located at the free end outside the right-angle liquid outlet component and is electrically connected to the nozzle package constant liquid level closed-loop control system and the vacuum furnace pouring start and close control system; the vertical runner insulation assembly includes a fixed shell fixedly connected to the furnace body, a flow channel lining connected to the vertical outlet end of the side bottom pouring steel device is set in the fixed shell, a vertical runner corresponding to the water inlet of the nozzle package mechanism is set in the flow channel lining, an axially extending silicon carbon rod is set between the flow channel lining and the fixed shell, and an insulation layer is installed between the silicon carbon rod and the fixed shell; A general automatic control system is arranged on the frame platform, and the vacuum furnace system, the nozzle package mechanism, the nozzle package constant liquid level closed-loop control system, the crystallizer, the automatic belt taking-up device, the online thickness measuring device, the strip thickness constant closed-loop control system, and the vacuum furnace pouring start-stop control system are all electrically connected to the general automatic control system.

2. The large-capacity nanocrystalline ribbon production system according to claim 1, characterized in that: The vacuum furnace system includes a platform frame, a sliding roller is installed at the bottom end of the platform frame, and the sliding roller is slidably installed on the walking track. A vacuum furnace body and a vacuum system connected to the vacuum furnace body are installed on the platform frame, and the vacuum system is correspondingly equipped with a vacuum furnace power supply system.

3. The large-capacity nanocrystalline ribbon production system according to claim 1, characterized in that: The nozzle package mechanism includes a nozzle package body and a nozzle package position adjustment mechanism for controlling the distance of the bottom nozzle of the nozzle package body relative to the upper cutting surface of the crystallizer. The strip thickness constant closed-loop control system is electrically connected between the online thickness measuring device and the nozzle package position adjustment mechanism and controls the nozzle package position adjustment mechanism to adjust the distance of the bottom nozzle of the nozzle package body relative to the upper cutting surface of the crystallizer.

4. The large-capacity nanocrystalline ribbon production system according to claim 3, characterized in that: The nozzle package is a high liquid level nozzle package, and a nozzle package float is arranged in the nozzle package. The nozzle package float floats on the molten iron liquid surface in the nozzle package. The nozzle package constant liquid level closed-loop control system is electrically connected between the nozzle package float and the horizontal plug rod assembly and controls the opening amplitude of the horizontal plug rod assembly according to the liquid level height in the nozzle package; a nozzle package plug rod is detachably installed in the nozzle package corresponding to the water outlet of the nozzle package, and a nozzle is installed at the bottom end of the nozzle package corresponding to the water outlet of the nozzle package, and the nozzle corresponds to the crystallizer; an inert gas protection device is arranged at the nozzle package and the water inlet of the nozzle package to prevent the oxidation of molten steel during the continuous flow of molten iron.

5. The large-capacity nanocrystalline ribbon production system according to claim 4, characterized in that: A nozzle plugging rod opening and closing control system for controlling the nozzle plugging rod to switch between a belt spraying state and a belt non-spraying state is electrically connected between the nozzle plugging rod and the frame platform.

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