A smart crystallizer protective cover for replenishing argon gas

Abstract

This invention relates to the technical field of electroslag remelting production equipment, and discloses an intelligent argon-supplemented crystallizer protective cover, comprising a protective cover body, a vertical cylinder for supplying argon gas into the cover body fixedly connected to the top of the protective cover body, an inlet pipe connected to one side of the vertical cylinder, and a protective assembly for protecting the inner wall of the protective cover body installed inside the protective cover body. The protective assembly includes a ring slidably connected to the inner wall of the protective cover body, a hemispherical shell fixedly connected to the top of the ring, a circular hole opened at the top of the hemispherical shell, a lifting assembly for driving the ring and hemispherical shell to rise and fall, and a limit assembly installed on the inner top of the protective cover body. This invention solves the problem in the prior art that it is difficult to improve the protective capability of the protective cover by using the input low-temperature inert gas, while enhancing the preheating capability of the inert gas and reducing the possibility of quality degradation of the crystallizer and steel ingot due to low-temperature stimulation.

Description

Technical Field

[0001] This invention relates to the field of electroslag remelting production equipment technology, and in particular to an intelligent argon replenishment crystallizer protective cover. Background Technology

[0002] Atmosphere-protected electroslag remelting furnaces prevent excessive oxidation of steel ingots and improve the cleanliness of the alloy by introducing inert gases such as argon during the smelting process to isolate the furnace from air.

[0003] A search revealed that patent application number CN201610410331.1 discloses an electroslag remelting furnace, including an atmosphere protection device. The atmosphere protection device includes a protective cover disposed between the dummy electrode and the upper surface of the crystallizer and an air inlet pipe that allows air to enter the protective cover. In the protective atmosphere electroslag furnace, the entire part from the crystallizer to the dummy electrode is sealed by the protective cover, so that the crystallizer and slag surface are always isolated from the air and protected by a protective gas during the remelting process.

[0004] However, a large amount of heat from the crystallizer and the surface of the steel ingot in the above-mentioned device dissipates into the protective cover, continuously baking the protective cover at high temperature, which can easily lead to damage to the protective cover. Although the gas preheating chamber can preheat the input inert gas to a certain extent, there is a certain speed at which the inert gas can be input. When the input speed is too fast, the preheating will still be insufficient, causing the low-temperature inert gas to stimulate the high-temperature crystallizer and steel ingot. Therefore, there is a need for a device that can make full use of the input low-temperature inert gas to improve the protective capability of the protective cover, while enhancing the preheating capability of the inert gas and reducing the possibility of quality degradation of the crystallizer and steel ingot due to low-temperature stimulation. Summary of the Invention

[0005] The purpose of this invention is to solve the problem in the prior art that it is difficult to improve the protective capability of the protective cover by using the input inert gas at a low temperature, while enhancing the preheating capability of the inert gas and reducing the possibility of quality degradation of the crystallizer and steel ingot due to low temperature stimulation. Therefore, an intelligent argon-supplemented crystallizer protective cover is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A crystallizer protective cover for intelligent argon replenishment includes a protective cover body, a vertical barrel for supplying argon gas into the top of the protective cover body is fixedly connected, an air inlet pipe is connected to one side of the vertical barrel, and a protective component for protecting the inner wall is installed inside the protective cover body.

[0008] The protective component includes a ring that is slidably connected to the inner wall of the protective cover body. A hemispherical shell is fixedly connected to the top of the ring. A circular hole is opened on the top of the hemispherical shell. A lifting component for driving the ring and the hemispherical shell to rise and fall is installed on the top of the protective cover body. A limit component is installed on the top inner side of the protective cover body.

[0009] The limiting component includes a cylinder with one end extending movably into the interior of the vertical barrel. A first spring is fixedly connected between the top of the cylinder and the vertical barrel. A circular plate for blocking the hemispherical shell is sleeved on the outside of the cylinder. Multiple longitudinal grooves are opened on the outside of the cylinder to allow argon gas from inside the vertical barrel to flow into the interior of the protective cover body.

[0010] Preferably, the cylinder has a circular groove inside that communicates with the longitudinal groove, a first motor is fixedly connected to the top of the inner side of the circular groove, and a fan blade is fixedly connected to the output end of the first motor.

[0011] Preferably, the lifting assembly includes a sealing tube fixedly connected to the top of the protective cover body. The top of the sealing tube is closed, and a rotating rod with one end extending movably into the interior of the protective cover body is provided on the top inner side of the sealing tube. The bottom of the rotating rod is provided with an external thread, and a horizontal plate fixed to the protective cover body is rotatably connected to the bottom of the rotating rod. The rotating rod contacts the horizontal plate but is not fixed, which facilitates the separation of the upper and lower parts of the protective cover body. The rotating rod and the external thread movably pass through the ring, and a second motor for driving the rotating rod to rotate is fixedly connected to the top of the sealing tube.

[0012] Preferably, the protective cover body includes an upper protective cover and a lower protective cover, which are fixed together by bolts and nuts. The vertical barrel and sealing tube are fixed to the upper protective cover, the ring and the horizontal plate are connected to the lower protective cover, and the top of the upper protective cover is covered with an asbestos cover.

[0013] Preferably, the inner wall of the lower protective cover is fixedly connected with multiple gas detection probes, and the top of the vertical barrel is equipped with an intelligent controller for controlling the opening and closing of its air inlet. The gas detection probes are electrically connected to the intelligent controller.

[0014] Preferably, the inner wall of the upper protective cover is fixedly connected with multiple outer frames, and one side of the inner wall of the outer frame is provided with multiple metal plates with one end extending movably to the outside. One end of the metal plate is fixed to the upper protective cover, and an arc-shaped plate with one end extending movably to the outside is provided between the two sides of the inner wall of the outer frame. The end of the arc-shaped plate away from the outer frame is fixedly connected to a circular plate.

[0015] Preferably, the bottom of the arc-shaped plate is provided with an extension plate that extends movably into the interior thereon, and one side of the arc-shaped plate is provided with bolts for fixing the extension plate to the arc-shaped plate.

[0016] Preferably, a vent pipe is connected to one side of the lower protective cover, a valve is installed at one end of the vent pipe near the lower protective cover, and a heat insulation frame fixed to the lower protective cover is connected to one end of the vent pipe.

[0017] Preferably, one side of the lower protective cover has an opening communicating with the heat insulation frame, and two second springs are fixedly connected to one side of the inner wall of the lower protective cover, with a lightweight block for blocking the opening fixedly connected between the two second springs.

[0018] Preferably, a slider is slidably connected between the two sides of the inner wall of the heat insulation frame, and a handle is provided on one side of the slider, with one end extending movably to the outside of the heat insulation frame. A third spring for pushing a lightweight block is fixedly connected to the side of the slider away from the handle.

[0019] Compared with the prior art, the present invention provides an intelligent argon replenishment crystallizer protective cover, which has the following beneficial effects:

[0020] 1. The lifting component of this invention drives the hemispherical shell to rise and fall, which in turn drives the argon gas at different temperatures inside the protective cover to move and mix in a directional manner. It can use the inert gas with a lower temperature input to the protective cover to form a gas cover on the inner wall of the protective cover, preventing the high temperature argon gas from directly baking the protective cover and improving the protective capability of the protective cover. At the same time, the high pressure generated by extrusion heats the argon gas in two stages, which enhances the preheating capability of the inert gas and reduces the possibility of the crystallizer and steel ingot being stimulated by low temperature to reduce quality decline.

[0021] 2. In this invention, the hemispherical shell rises to push the cylinder up. After the longitudinal grooves are all moved into the vertical barrel, argon gas can no longer enter the protective cover. This achieves the purpose of automatically controlling the opening and closing of the channel for supplying argon gas into the protective cover. It can stop supplying lower temperature argon gas into the protective cover during the process of preheating argon gas flowing into the crystallizer. This prevents the lower temperature argon gas flow rate into the protective cover body from being too fast and directly impacting the vicinity of the crystallizer and contacting the crystallizer and steel ingot, which would cause the steel ingot to suffer from low temperature stimulation and quality decline during the forming process.

[0022] 3. The intelligent controller of this invention monitors the gas inside the crystallizer in real time through a gas detection probe, displays the dynamic distribution of gas inside the crystallizer furnace through the display of the intelligent controller, and prevents the molten metal in the crystallizer from being oxidized by air and causing oxide inclusions through the intelligent controller for replenishing inert gas, thereby improving the quality of the steel ingot after smelting and increasing the yield of special metallurgical alloys.

[0023] 4. The extension plate of this invention lowers and presses the unfolded metal sheet tightly against the inner wall of the outer frame. This can reduce the heat conduction rate of the inner wall of the protective cover when the high-temperature argon gas flows towards the inner wall of the protective cover, thereby reducing the rate at which the heat of the argon gas is transferred to the inner wall of the protective cover. At the same time, when the high-temperature argon gas no longer flows towards the inner wall of the protective cover, the metal sheet automatically unfolds, thereby increasing the rate at which the heat on the surface of the protective cover dissipates into the surrounding argon gas, achieving the purpose of reducing the temperature of the protective cover body and preventing the protective cover from being damaged by high-temperature baking for a long time.

[0024] 5. This invention pushes the slider to move continuously toward the protective cover body. Air with a high argon content inside the heat insulation frame enters the protective cover body through the opening. Then, the air inlet pipe sends argon into the protective cover body. It can collect the discharged gas with a high argon content during the process of expelling the air inside the protective cover and crystallizer. When the crystallizer is used again, the collected gas with a high argon content is used first to expel the air inside the protective cover and crystallizer, reducing the waste of argon and improving the utilization of argon. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is an internal cross-sectional view of the entire invention;

[0027] Figure 3 This is a schematic diagram of the structure of the protective component of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the limiting component of the present invention;

[0029] Figure 5 This is a structural schematic diagram of the connection between the outer frame, the arc plate, and the cylinder of the present invention;

[0030] Figure 6 This is a schematic diagram of the outer frame of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the heat insulation frame and the lower protective cover of the present invention;

[0032] Figure 8 This is an internal cross-sectional view of the heat insulation frame and the lower protective cover of the present invention;

[0033] Figure 9 This is an internal cross-sectional view of the heat insulation frame of the present invention.

[0034] In the diagram: 1. Protective cover body; 2. Vertical barrel; 3. Air inlet pipe; 4. Protective component; 41. Ring; 42. Hemispherical shell; 43. Lifting component; 431. Sealing pipe; 432. Rotating rod; 433. Horizontal plate; 434. Second motor; 44. Limiting component; 441. Cylinder; 442. First spring; 443. Circular plate; 5. First motor; 6. Fan blade plate; 7. Asbestos cover; 8. Gas detection probe; 9. Intelligent controller; 10. Outer frame; 11. Metal sheet; 12. Arc plate; 13. Extension plate; 14. Bolt; 15. Vent pipe; 16. Valve; 17. Heat insulation frame; 18. Second spring; 19. Lightweight block; 20. Slider; 21. Handle; 22. Third spring. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "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 invention 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 invention.

[0037] Example 1

[0038] Reference Figures 1-4 An intelligent argon-supplemented crystallizer protective cover includes a protective cover body 1. A vertical cylinder 2 for supplying argon gas into the protective cover body 1 is fixedly connected to the top of the protective cover body 1. An air inlet pipe 3 is connected to one side of the vertical cylinder 2. A protective component 4 for protecting the inner wall of the protective cover body 1 is installed inside the protective cover body 1. The protective cover body 1 is installed on the top of the crystallizer. Argon gas is supplied to the protective cover body 1 and the inside of the crystallizer through the air inlet pipe 3. The argon gas entering the protective cover body 1 displaces the original air inside the protective cover body 1, preventing the steel ingot inside the crystallizer from contacting oxygen and oxidizing. The protective component 4 disperses the argon gas input into the protective cover body 1 on the inner wall of the protective cover body 1, forming a low-temperature argon gas shield inside the protective cover body 1, preventing the high temperature generated by the crystallizer from directly baking the inner wall of the protective cover body 1.

[0039] The protective component 4 includes a ring 41 that is slidably connected to the inner wall of the protective cover body 1. A hemispherical shell 42 is fixedly connected to the top of the ring 41. A circular hole is opened on the top of the hemispherical shell 42. A lifting component 43 for driving the ring 41 and the hemispherical shell 42 to rise and fall is installed on the top of the protective cover body 1. A limiting component 44 is installed on the top inner side of the protective cover body 1. The space inside the protective cover body 1 above the hemispherical shell 42 is defined as the upper half, and the space inside the protective cover body 1 below the hemispherical shell 42 is defined as the lower half. The gas inlet pipe 3 delivers argon gas to the upper half, and the heat inside the crystallizer heats the argon gas in the lower half. The hemispherical shell 42 slows down the exchange rate between the lower-temperature argon gas in the upper half and the higher-temperature argon gas in the lower half, making the temperature of the upper half lower than that of the lower half. Initially, the hemispherical shell 42 is in a higher position inside the protective cover body 1, and the circular hole of the hemispherical shell 42 is blocked by the limiting component 44. The lifting component 43 drives the ring 41 and the hemispherical shell 42 to descend, increasing the space in the upper half and reducing the gas pressure, until the circular hole on the hemispherical shell 42 is no longer blocked by the limiting component 44. The higher-temperature argon gas in the lower half, after being heated, flows into the upper half due to the pressure difference through the circular hole, pushing the originally lower-temperature argon gas in the upper half outward and tightly adhering to the protective cover. The inner wall of the protective cover body 1 forms a layer of low-temperature gas to prevent high-temperature argon gas from directly baking the inner wall of the protective cover body 1. The high-temperature argon gas in the lower half flows rapidly through the circular hole and mixes with the low-temperature argon gas in the upper half until the hemispherical shell 42 descends to its lowest point. Then, the lifting component 43 drives the ring 41 and the hemispherical shell 42 to rise. The hemispherical shell 42 compresses the argon gas in the upper half and reduces the space in the upper half. The argon gas of different temperatures in the upper half is compressed and the mixing speed is accelerated, so that the originally low-temperature argon gas in the upper half is mixed with some of the high-temperature argon gas for preheating. During this process, the gas pressure in the upper half increases and the gas pressure in the lower half decreases. The argon gas in the upper half, after being preheated, flows through the circular hole to the lower half due to the pressure difference on both sides of the hemispherical shell 42. It mixes and heats again with the argon gas in the lower half, which is at a higher temperature, and finally comes into contact with the crystallizer. The low-temperature inert gas input into the protective cover can form a gas shield on the inner wall of the protective cover, preventing the high-temperature argon gas from directly baking the protective cover and improving the protective capability of the protective cover. At the same time, the high pressure generated by extrusion heats the argon gas in two stages, enhancing the preheating capability of the inert gas and reducing the possibility of the crystallizer and steel ingot being stimulated by low temperature and causing quality degradation.

[0040] The limiting component 44 includes a cylinder 441 with one end extending movably into the interior of the vertical barrel 2. A first spring 442 is fixedly connected between the top of the cylinder 441 and the vertical barrel 2. A circular plate 443 for blocking the hemispherical shell 42 is sleeved on the outside of the cylinder 441. Multiple longitudinal grooves are opened on the outside of the cylinder 441 to allow argon gas from inside the vertical barrel 2 to flow into the interior of the protective cover body 1. Due to its own weight, the cylinder 441 pulls the first spring 442 to elongate and deform. After the longitudinal grooves descend, they connect the vertical barrel 2 and the protective cover body 1. At this time, the argon gas in the air inlet pipe 3 can enter the interior of the protective cover body 1 through the vertical barrel 2. During the process of the lifting component 43 driving the ring 41 and the hemispherical shell 42 to descend, the argon gas with a higher temperature in the lower half of the region passes through the circular hole of the hemispherical shell 42 into the upper half of the region, squeezing the argon gas with a lower temperature in the upper half of the vertical barrel 2 against the inner wall of the protective cover body 1, thereby preventing high-temperature air from directly contacting the protective cover body 1. During the process of raising the ring 41 and the hemispherical shell 42, the argon gas in the upper half of the shell passes through the circular hole on the hemispherical shell 42 into the lower half of the shell until the circular hole on the hemispherical shell 42 is blocked by the cylinder 441. At this time, the argon gas inside the hemispherical shell 42 cannot enter the lower half of the shell. The hemispherical shell 42 continues to rise, pushing the circular plate 443 and the cylinder 441 to rise, squeezing and contracting the first spring 442. At this time, all the longitudinal grooves on the cylinder 441 move into the vertical barrel 2. The argon gas inside the vertical barrel 2 cannot enter the protective cover body 1 through the longitudinal grooves. This achieves the purpose of automatically controlling the opening and closing of the channel for supplying argon gas into the protective cover. It can stop supplying the lower temperature argon gas into the protective cover during the process of the preheated argon gas flowing into the crystallizer, preventing the lower temperature argon gas supplied into the protective cover body 1 from flowing too fast and directly impacting the vicinity of the crystallizer and contacting the crystallizer and steel ingot, causing the steel ingot to be stimulated by low temperature and its quality to decline during the forming process.

[0041] The lifting assembly 43 includes a sealing tube 431 fixedly connected to the top of the protective cover body 1. The top of the sealing tube 431 is closed. A rotating rod 432 is provided on the top inner side of the sealing tube 431, with one end extending movably into the interior of the protective cover body 1. The bottom of the rotating rod 432 is provided with an external thread. The bottom of the rotating rod 432 is rotatably connected to a horizontal plate 433 fixed to the protective cover body 1. The rotating rod 432 contacts the horizontal plate 433 but is not fixed, which facilitates the separation of the upper and lower parts of the protective cover body 1. The rotating rod 432 and the external thread movably pass through the ring 41. A second motor 434 for driving the rotating rod 432 to rotate is fixedly connected to the top of the sealing tube 431. When the hemispherical shell 42 needs to be raised or lowered, the second motor 434 is started to drive the rotating rod 432 and its external thread to rotate, thereby driving the ring 41 and the hemispherical shell 42 to rise or fall, thus realizing the need for the hemispherical shell 42 to rise or fall.

[0042] The protective cover body 1 includes an upper protective cover and a lower protective cover, which are fixed together by bolts and nuts. The vertical barrel 2 and the sealing tube 431 are fixed to the upper protective cover, and the ring 41 and the horizontal plate 433 are connected to the lower protective cover. The top of the upper protective cover is covered with an asbestos cover 7. The protective cover body 1 is divided into upper and lower parts and fixed together by bolts and nuts, which facilitates the installation and use of the protective cover. The asbestos cover 7 increases the heat insulation capacity of the protective cover and prevents the heat inside the protective cover from being transferred to the surrounding air.

[0043] Multiple gas detection probes 8 are fixedly connected to the inner wall of the lower protective cover. An intelligent controller 9 is installed on the top of the vertical barrel 2 to control the opening and closing of its air inlet. The gas detection probes 8 are electrically connected to the intelligent controller 9. The intelligent controller 9 monitors the gas inside the crystallizer in real time through the gas detection probes 8 and displays the dynamic distribution of gas inside the crystallizer furnace through the display of the intelligent controller 9. When the argon content in the crystallizer is lower than the set value, the connection between the air inlet pipe 3 and the vertical barrel 2 is opened in time to replenish the crystallizer with inert argon gas. When the argon content in the crystallizer is higher than the set value, the inert argon gas inlet is reduced in time to save argon gas flow and reduce resource consumption. Through the intelligent controller for replenishing inert gas, the molten metal in the crystallizer can be prevented from being oxidized by air, resulting in oxide inclusions, which improves the quality of the steel ingot after smelting and increases the yield of special metallurgical alloys.

[0044] Example 2

[0045] like Figures 1-6 As shown, this embodiment is basically the same as embodiment 1. Preferably, the cylinder 441 has a circular groove inside that communicates with the longitudinal groove. The top of the inner side of the circular groove is fixedly connected to a first motor 5. The output end of the first motor 5 is fixedly connected to a fan blade 6. The first motor 5 drives the fan blade 6 to rotate continuously, pushing the argon gas inside the circular groove to the outside. When the argon gas inside the inlet pipe 3 enters the protective cover body 1 through the vertical barrel 2, the argon gas is pushed and accelerated by the fan blade 6 to move along the inner wall of the protective cover body 1, and then moves to a position further away from the cylinder 441 on the inner wall of the protective cover body 1. This can help the lower temperature argon gas to better form a gas cover composed of lower temperature argon gas on the inner wall of the protective cover body 1, reducing the possibility that the lower temperature argon gas delivered to the protective cover body 1 will be squeezed and accumulated in a clump by the original argon gas inside the protective cover body 1 and cannot form a gas cover. At the same time, the relatively lower temperature argon gas is continuously cooled by air during the process of being delivered to the protective cover body 1, reducing the possibility that the first motor 5 inside the protective cover body 1 will be damaged by the high temperature inside the crystallizer.

[0046] Multiple outer frames 10 are fixedly connected to the inner wall of the upper protective cover. Multiple metal plates 11, one end of which extends movably to the outside, are provided on one side of the inner wall of each outer frame 10. One end of each metal plate 11 is fixed to the upper protective cover. An arc-shaped plate 12, one end of which extends movably to the outside, is provided between the two sides of the inner wall of the outer frame 10. The end of the arc-shaped plate 12 away from the outer frame 10 is fixedly connected to a circular plate 443. An extension plate 13, one end of which extends movably to the inside, is provided at the bottom of the arc-shaped plate 12. One side of the arc-shaped plate 12 is provided with… Bolts 14 are provided for fixing the extension plate 13 to the arc plate 12. An extension plate 13 of appropriate length is inserted into the bottom of the arc plate 12, and then the bolts 14 are used to fix the extension plate 13 to the arc plate 12. During the process of the hemispherical shell 42 pushing the circular plate 443 and cylinder 441 upwards, the argon gas with a lower temperature in the upper half moves to the lower half, while the argon gas with a higher temperature in the lower half cannot move to the upper half due to the reduced gas pressure. The circular plate 443 pushes the arc plate 12 and extension plate 13 upwards. After the metal sheet 11 is no longer squeezed by the arc plate 12 and the extension plate 13, it expands due to its own elasticity. The increased surface area of ​​the metal sheet 11 increases the heat dissipation rate of the inner wall of the protective cover body 1. During the descent of the hemispherical shell 42, the thrust of the first spring 442 and the gravity of the cylinder 441 drive the arc plate 12 to descend, which in turn drives the extension plate 13 to descend, squeezing the expanded metal sheet 11 tightly against the inner wall of the outer frame 10. After the overall surface area of ​​the metal sheet 11 is small, the heat dissipation capacity decreases. At this time, the argon gas with a higher temperature in the lower half flows to the upper half, which can reduce the heat conduction rate of the inner wall of the protective cover when the argon gas with a higher temperature flows to the inner wall of the protective cover, and reduce the rate at which the heat of the argon gas is transferred to the inner wall of the protective cover. At the same time, when the argon gas with a higher temperature no longer flows to the inner wall of the protective cover, the metal sheet 11 automatically expands, thereby increasing the rate at which the heat on the surface of the protective cover is dissipated into the surrounding argon gas, achieving the purpose of reducing the temperature of the protective cover body 1 and preventing the protective cover from being damaged by high temperature baking for a long time.

[0047] Example 3

[0048] like Figures 1-7As shown, this embodiment is basically the same as embodiment 1. Preferably, a vent pipe 15 is connected to one side of the lower protective cover. A valve 16 is installed at one end of the vent pipe 15 near the lower protective cover. A heat insulation frame 17 fixed to the lower protective cover is connected to one end of the vent pipe 15. Before the crystallizer starts working, the valve 16 is opened first, and then argon gas is introduced into the protective cover body 1 through the air inlet pipe 3. The argon gas pushes the air originally present in the protective cover body 1 and the crystallizer out through the vent pipe 15. After the vent pipe 15 exhausts gas for a period of time, the argon content in the exhaust gas gradually increases. The heat insulation frame 17 is used to collect the gas discharged from the vent pipe 15 until all the air inside the protective cover and the crystallizer is discharged. Then the valve 16 is closed. At this time, a part of the air with high argon content is collected inside the heat insulation frame 17, which is convenient for subsequent reuse of the air with high argon content and reduces the waste of argon gas.

[0049] Example 4

[0050] like Figures 1-9As shown, this embodiment is basically the same as embodiment 1. Preferably, one side of the lower protective cover has an opening communicating with the heat insulation frame 17. Two second springs 18 are fixedly connected to one side of the inner wall of the lower protective cover. A lightweight block 19 for blocking the opening is fixedly connected between the two second springs 18. A slider 20 is slidably connected between the two sides of the inner wall of the heat insulation frame 17. A handle 21 with one end extending movably to the outside of the heat insulation frame 17 is provided on one side of the slider 20. A third spring 22 for pushing the lightweight block 19 is fixedly connected to the side of the slider 20 away from the handle 21. Before the crystallizer starts working, the operator holds the handle 21 and pushes the slider 20 towards the protective cover body 1 until the slider 20 passes through the opening where the vent pipe 15 connects to the heat insulation frame 17. Argon gas is introduced into the protective cover body 1 through the inlet pipe 3. After entering the protective cover body 1, the argon gas first forces out the original air inside through the vent pipe 15. The air discharged from the vent pipe 15 passes through the opening and exits through the heat insulation frame 17. After a period of time, the argon content in the discharged air gradually increases. At this time, the operator holds the handle 21 and pulls the slider 20 away from the protective cover body 1. The opening at the connection between the vent pipe 15 and the heat insulation frame 17 is inside the sealed space formed by the heat insulation frame 17 and the slider 20. At this time, the air with a high argon content inside the protective cover body 1 is discharged into the heat insulation frame 17 after passing through the vent pipe 15. The heat insulation frame 17 serves to retain the air with a high argon content discharged from the protective cover body 1 until the protective cover... All the air inside the main body 1 is exhausted. At this time, valve 16 is closed, and the crystallizer starts working. When the crystallizer finishes working and needs to exhaust the internal argon gas, valve 16 is opened again. The argon gas inside the protective cover main body 1 enters the heat insulation frame 17 through the vent pipe 15, thus completing the purpose of collecting air with a high argon content. When the crystallizer works again, the air inside the protective cover main body 1 needs to be exhausted again. At this time, the air with a high gas pressure content inside the heat insulation frame 17 is used first. First, the operator holds the handle 21 and pushes the slider 20 continuously towards the protective cover main body 1 until the slider 20 contacts the protective cover main body 1. During this process, the gas inside the heat insulation frame 17 is first compressed and contracted by the slider 20. As the slider 20 moves, the gas inside the heat insulation frame 17 is compressed and contracted by the slider 20. The third spring 22 contacts the lightweight block 19, and then the third spring 22, driven by the slider 20, pushes the lightweight block 19 away from the inner wall of the protective cover body 1. During the movement of the lightweight block 19, the second spring 18 is stretched and deformed. At this time, the opening at the connection between the heat insulation frame 17 and the protective cover body 1 is no longer blocked by the lightweight block 19. The air with a high argon content inside the heat insulation frame 17 enters the interior of the protective cover body 1 through the opening, squeezing some of the air inside the protective cover body 1 into the vent pipe 15, and then venting it out of the heat insulation frame 17 through the vent pipe 15, until the slider 20 squeezes all the gas inside the heat insulation frame 17 into the interior of the protective cover body 1. Then, the air inlet pipe 3 sends argon into the interior of the protective cover body 1, expelling all the air inside the protective cover body 1.During this process, the operator moves slider 20 in the same way, repeatedly collecting the high-argon-content air discharged from inside the protective cover body 1 into the heat insulation frame 17. The third spring 22, moving with slider 20, no longer compresses the lightweight block 19. The second spring 18, due to its elasticity, pulls the lightweight block 19 again, blocking the opening between the heat insulation frame 17 and the protective cover body 1. As the amount of argon inside the protective cover body 1 gradually increases, the internal pressure rises. The lightweight block 19, due to the pressure difference on both sides, is tightly compressed against the inner wall of the protective cover body 1. This allows the operator to collect the high-argon-content gas discharged during the process of venting air from the protective cover and the crystallizer. When the crystallizer is used again, the collected high-argon-content gas is used first to vent the air from the protective cover and the crystallizer, reducing argon waste and improving argon utilization.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent argon-supplemented crystallizer protective cover, comprising a protective cover body (1), characterized in that, The top of the protective cover body (1) is fixedly connected to a vertical barrel (2) for conveying argon gas into it. One side of the vertical barrel (2) is connected to an air inlet pipe (3). The protective cover body (1) is equipped with a protective component (4) for protecting its inner wall. The protective component (4) includes a ring (41) that is slidably connected to the inner wall of the protective cover body (1). A hemispherical shell (42) is fixedly connected to the top of the ring (41). A circular hole is opened on the top of the hemispherical shell (42). A lifting component (43) for driving the ring (41) and the hemispherical shell (42) to rise and fall is installed on the top of the protective cover body (1). A limit component (44) is installed on the inner top of the protective cover body (1). The limiting component (44) includes a cylinder (441) with one end extending movably into the interior of the vertical barrel (2). A first spring (442) is fixedly connected between the top of the cylinder (441) and the vertical barrel (2). A circular plate (443) for blocking the hemispherical shell (42) is sleeved on the outside of the cylinder (441). Multiple longitudinal grooves are opened on the outside of the cylinder (441) for argon gas inside the vertical barrel (2) to flow into the interior of the protective cover body (1).

2. The intelligent argon replenishment crystallizer protective cover according to claim 1, characterized in that, The cylinder (441) has a circular groove inside that communicates with the longitudinal groove. A first motor (5) is fixedly connected to the top of the inner side of the circular groove, and a fan blade plate (6) is fixedly connected to the output end of the first motor (5).

3. The intelligent argon replenishment crystallizer protective cover according to claim 1, characterized in that, The lifting assembly (43) includes a sealing tube (431) fixedly connected to the top of the protective cover body (1). The top of the sealing tube (431) is closed. A rotating rod (432) with one end extending movably into the interior of the protective cover body (1) is provided on the top of the inner side of the sealing tube (431). The bottom of the rotating rod (432) is provided with an external thread. A horizontal plate (433) fixed to the protective cover body (1) is rotatably connected to the bottom of the rotating rod (432). The rotating rod (432) and the external thread movably pass through the ring (41). A second motor (434) for driving the rotating rod (432) to rotate is fixedly connected to the top of the sealing tube (431).

4. The intelligent argon replenishment crystallizer protective cover according to claim 3, characterized in that, The protective cover body (1) includes an upper protective cover and a lower protective cover, which are fixed together by bolts and nuts. The vertical barrel (2) and the sealing tube (431) are fixed to the upper protective cover. The ring (41) and the horizontal plate (433) are connected to the lower protective cover. The top of the upper protective cover is covered with an asbestos cover (7).

5. The intelligent argon replenishment crystallizer protective cover according to claim 4, characterized in that, Multiple gas detection probes (8) are fixedly connected to the inner wall of the lower protective cover. A smart controller (9) for controlling the opening and closing of its air inlet is installed on the top of the vertical barrel (2). The gas detection probes (8) are electrically connected to the smart controller (9).

6. The intelligent argon replenishment crystallizer protective cover according to claim 4, characterized in that, The inner wall of the upper protective cover is fixedly connected with multiple outer frames (10). On one side of the inner wall of the outer frame (10), multiple metal pieces (11) with one end extending movably to the outside are provided. One end of the metal piece (11) is fixed to the upper protective cover. An arc-shaped plate (12) with one end extending movably to the outside is provided between the two sides of the inner wall of the outer frame (10). The end of the arc-shaped plate (12) away from the outer frame (10) is fixedly connected to the circular plate (443).

7. The intelligent argon replenishment crystallizer protective cover according to claim 6, characterized in that, The bottom of the arc plate (12) is provided with an extension plate (13) that extends movably into its interior, and a bolt (14) is provided on one side of the arc plate (12) for fixing the extension plate (13) to the arc plate (12).

8. The intelligent argon replenishment crystallizer protective cover according to claim 4, characterized in that, One side of the lower protective cover is connected to a vent pipe (15), and a valve (16) is installed at one end of the vent pipe (15) near the lower protective cover. One end of the vent pipe (15) is connected to a heat insulation frame (17) fixed to the lower protective cover.

9. A crystallizer protective cover for intelligent argon replenishment according to claim 8, characterized in that, The lower protective cover has an opening on one side that communicates with the heat insulation frame (17). Two second springs (18) are fixedly connected to one side of the inner wall of the lower protective cover. A lightweight block (19) for blocking the opening is fixedly connected between the two second springs (18).

10. A crystallizer protective cover for intelligent argon replenishment according to claim 9, characterized in that, A slider (20) is slidably connected between the two sides of the inner wall of the heat insulation frame (17). A handle (21) is provided on one side of the slider (20) with one end extending movably to the outside of the heat insulation frame (17). A third spring (22) for pushing the lightweight block (19) is fixedly connected to the side of the slider (20) away from the handle (21).

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