A vacuum melting device and a protective atmosphere continuous casting method thereof

Abstract

The invention discloses a vacuum smelting equipment and a protective atmosphere continuous casting method thereof, and relates to the technical field of smelting. The smelting equipment comprises a smelting box, in which an induction furnace body for molten metal is arranged, and a vacuum protection chamber is fixedly arranged on one side of the smelting box; a receiving groove is arranged on the side of the smelting box close to the vacuum protection chamber, and a liquid guide groove is arranged at the bottom of the receiving groove, and the other end of the liquid guide groove extends into the vacuum protection chamber; a filter box is arranged at the bottom of the receiving groove, and a filter plate is embedded in the filter box, and filter holes are evenly arranged on the filter plate; wherein a scraper module is also arranged on one side of the filter box, and the scraper module is used for scraping impurities on the filter plate; the invention does not need to manually open the smelting box to take out the filter plate, and can keep the smelting box in a fully closed state, thereby avoiding gas exchange between the smelting box and the outside world, and achieving a continuous sealing effect.

Description

Technical Field

[0001] The invention relates to the technical field of smelting, and in particular to a vacuum smelting device and a protective atmosphere continuous casting method thereof. Background Art

[0002] Vacuum melting is a special melting technology for melting metals and alloys under vacuum conditions. The smelting atmosphere is vacuum conditions. Vacuum melting can prevent the smelted metal from contacting with reactive gases such as oxygen, nitrogen, and hydrogen in the air. The vacuum melting chamber is a common vacuum melting equipment that can melt metal under vacuum to obtain high-quality casting liquid. In ordinary semi-continuous casting, the casting billet shell cannot achieve effective vacuum sealing because the casting billet shell shell must be water-cooled at the outlet of the crystallizer. Therefore, the casting billet shell shell shell of the crystallizer liquid level and the casting billet liquid level in the vacuum protection chamber are protected by atmosphere during casting.

[0003] In the prior art, for example, the application document with publication number CN112059134A discloses a vacuum melting atmosphere protection semi-continuous casting system, and also discloses a melting device, a casting device and a molding device;

[0004] In actual application, vacuum smelting is used. Although a relatively pure casting liquid can be obtained, if the metal itself contains impurities, impurities will still appear in the casting liquid. Although the impurities in the casting liquid can be removed by slag removal, the operator cannot extend the slag removal equipment into the smelting cavity under vacuum, which will still affect the quality of the casting. In the prior art, although the casting liquid can be filtered by adding a filter to the liquid guide trough, the filter holes of the filter are easily blocked by solid impurities after casting for a period of time, and the filter cannot be replaced or cleaned in time manually, and the effect of continuous casting cannot be achieved. Summary of the invention

[0005] The object of the present invention is to provide a vacuum melting equipment and a protective atmosphere continuous casting method thereof to solve the following technical problems:

[0006] 1) Impurities in the casting liquid cannot be cleaned; 2) Solid impurities in the casting liquid can easily cause filter blockage.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A vacuum smelting device comprises a smelting box, wherein an induction furnace for molten metal is arranged in the smelting box, and a vacuum protection chamber is fixedly arranged on one side of the smelting box;

[0009] A receiving groove is arranged on one side of the smelting box body close to the vacuum protection chamber, a liquid guide groove is arranged at the bottom of the receiving groove, and the other end of the liquid guide groove extends into the vacuum protection chamber;

[0010] A filter box is provided at the bottom of the receiving tank, a filter plate is embedded in the filter box, and filter holes are evenly arranged on the filter plate;

[0011] Wherein, a scraper module is also provided on one side of the filter box, and the scraper module is used to scrape off impurities on the filter plate.

[0012] Preferably, a material guide port is arranged on the side of the induction furnace body close to the vacuum protection chamber, and a rotating module is also arranged in the smelting box body to drive the induction furnace body to rotate.

[0013] Preferably, a filter frame is slidably provided on the filter plate;

[0014] Wherein, through grooves are provided on both side walls of the filter box, and the filter plate and the filter frame are slidably embedded in the through grooves.

[0015] Preferably, the two sides of the filter plate are symmetrically provided with slide grooves, and the bottom of the filter frame is correspondingly fixedly provided with a slide seat slidably connected with the slide grooves;

[0016] Wherein, magnets with opposite magnetic poles are respectively embedded on the contact surfaces of the slide groove and the slide seat.

[0017] Preferably, a screw is rotatably arranged in the smelting box, the screw is fixed to the output end of a servo motor fixedly arranged outside the smelting box, and a nut is spirally sleeved on the screw;

[0018] Wherein, support plates are fixedly arranged at both ends of one side of the filter plate, and limiting plates are vertically fixedly arranged on the support plates. The limiting plate on one side is fixed by a connecting rod and a nut.

[0019] Preferably, a top plate is arranged on one side of the through slot, and a plurality of groups of top rods corresponding to the filter holes are fixedly arranged on the top plate;

[0020] Wherein, the push rod is connected to a lifting part which drives the push rod to rise and fall.

[0021] Preferably, the lifting part includes a guide frame fixedly arranged on both sides of the top plate, an inclined frame is fixedly arranged on one end of the guide frame away from the filter box, the inclined frame is inclined toward the bottom, two groups of guide rods are fixedly arranged on one side of the liquid guide groove, two groups of guide seats are slidably arranged on the guide rods, and the guide seats are connected to the guide frame through elastic telescopic parts;

[0022] Wherein, a guide wheel which is rotatably arranged at the bottom of the support plate and is in rolling contact with the guide frame.

[0023] Preferably, two groups of baffles are fixedly arranged on one side of the liquid guide groove, and the baffles are slidably fitted with the guide seat;

[0024] Wherein, the contact surfaces of the baffle and the guide seat are respectively embedded with magnets with opposite magnetic poles.

[0025] Preferably, the scraper module comprises a limit rod fixedly arranged on the filter box, a limit frame is fixedly arranged on one end of the limit rod away from the filter box, and the height of the limit frame corresponds to the height of the filter frame;

[0026] Wherein, the filter frame is also fixedly provided with guide posts which are slidably connected to the limit plate, the guide posts on both sides are fixed by a connecting frame, and a second spring is provided on the guide posts.

[0027] A protective atmosphere continuous casting method for vacuum melting equipment comprises the following steps:

[0028] S1. placing the metal to be molten in an induction furnace;

[0029] S2, the vacuum equipment performs vacuum treatment on the melting box and the vacuum protection chamber. After vacuum treatment, the inert gas supply equipment provides protective gas to the melting box and the vacuum protection chamber;

[0030] S3, energizing the induction furnace to melt the metal to form a casting liquid;

[0031] S4, the rotating module drives the induction furnace body to rotate toward the vacuum protection chamber, and pours the molten liquid in the induction furnace body out through the material guide port;

[0032] S5, the casting liquid first falls into the receiving tank, and when it falls into the filter box, the solid impurities generated in the casting liquid are filtered through the filter plate arranged in the filter box, and the pure casting liquid passes through the filter hole and is discharged into the liquid guide tank for casting;

[0033] S6. After the first casting is completed, the rotating module drives the induction furnace body to reset, and the scraping module scrapes off the impurities on the filter plate.

[0034] Beneficial effects of the present invention:

[0035] (1) In the present invention, since the liquid guide groove usually has a certain length, if the casting liquid contains impurities, the impurities are easily deposited when flowing in the liquid guide groove, and it is difficult to clean them. In this embodiment, the casting liquid is filtered before entering the liquid guide groove, which can effectively avoid this phenomenon and extend the service life of the liquid guide groove;

[0036] (2) In the present invention, after the filter plate has been used for a period of time, the scraping module can scrape off the solid impurities attached to the surface of the filter plate due to filtration, so as to avoid clogging of the filter holes by these solid impurities and affecting the subsequent normal casting. When scraping, there is no need to manually open the smelting box to take out the filter plate, so that the smelting box can be kept in a fully closed state, thereby avoiding gas exchange between the smelting box and the outside world, and achieving a continuous sealing effect;

[0037] (3) In the present invention, when the nut drives the filter plate to be pulled out of the through groove, the push rod slides on the lower surface of the filter plate. When the filter plate moves to the top of the top plate, the lifting part can drive the top plate to rise so that the push rods are embedded in each filter hole one by one to push out the impurities in the filter holes. At this time, the top end of the push rod is flush with the upper surface of the filter plate, so as to facilitate the subsequent scraping. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] Figure 1 It is a structural schematic diagram of a vacuum melting equipment of the present invention;

[0040] Figure 2 It is a schematic diagram of the cross-section structure of a vacuum melting device of the present invention;

[0041] Figure 3 It is a structural schematic diagram of an induction furnace body in a vacuum melting device of the present invention;

[0042] Figure 4 It is a structural schematic diagram of a rotating module in a vacuum melting device of the present invention;

[0043] Figure 5 It is a structural schematic diagram of a liquid guide tank in a vacuum melting device of the present invention;

[0044] Figure 6 It is a structural schematic diagram of a top plate in a vacuum melting device of the present invention;

[0045] Figure 7 It is a structural schematic diagram of a screw in a vacuum melting device of the present invention;

[0046] Figure 8 It is a schematic diagram of the structure in which a top rod is embedded in a filter hole in a vacuum melting device of the present invention;

[0047] Fig. 9 It is a structural schematic diagram of a filter plate and a filter frame sliding against each other in a vacuum melting device of the present invention;

[0048] Fig.10 It is a structural schematic diagram of a chute in a vacuum melting device of the present invention.

[0049] In the figure: 1, melting box; 2, continuous casting machine; 3, induction furnace; 4, receiving tank; 5, collecting box; 6, top plate; 101, vacuum protection chamber; 102, horizontal cylinder; 103, lifting cylinder; 104, material taking port; 105, sealing door; 201, crystallizer; 202, receiving tube; 203, stopper mechanism; 204, casting port; 205, casting tube; 301, material guide port; 302, wedge plate; 303, U-shaped frame; 304, mounting plate; 305, support shaft; 306, gear; 307, rack; 308, driving plate; 401, filter box; 40 2. Liquid guide groove; 403. Filter plate; 404. Filter hole; 405. Filter frame; 406. Through groove; 407. Limit rod; 408. Limit frame; 501. Screw; 502. Servo motor; 503. Nut; 504. Slide seat; 505. Connecting frame; 506. Guide column; 507. Second spring; 508. Support plate; 509. Guide wheel; 510. Limit plate; 511. Slide groove; 601. Push rod; 602. Guide frame; 603. Tilt frame; 604. Guide rod; 605. Guide seat; 606. Telescopic cylinder; 607. First spring; 608. Baffle. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] Example 1

[0052] See also Figure 1 As shown, the present invention is a vacuum melting equipment, including a melting box 1, in which an induction furnace body 3 for molten metal is provided; specifically, the induction furnace body 3 can be melted by vacuum induction melting, vacuum arc remelting or electron beam melting, and the specific melting method is not limited thereto. The above melting methods are all prior arts, and are not elaborated in this embodiment.

[0053] A vacuum protection chamber 101 is fixedly arranged on one side of the smelting box 1; specifically, the smelting box 1 and the vacuum protection chamber 101 are communicated with each other, wherein the outsides of the smelting box 1 and the vacuum protection chamber 101 are equipped with vacuum pumping equipment and inert gas supply equipment, the vacuum pumping equipment is used to vacuum the smelting box 1 and the vacuum protection chamber 101, and the inert gas supply equipment is used to provide protective gas, such as argon, to the smelting box 1 and the vacuum protection chamber 101. The vacuum pumping equipment and the inert gas supply equipment of this embodiment are both existing technologies, and their specific structures and principles are not described in detail.

[0054] See also Figure 1-Figure 3 In this embodiment, a material guide port 301 is arranged on the side of the induction furnace body 3 facing the vacuum protection chamber 101, wherein a rotating module is also arranged in the smelting box 1 to drive the induction furnace body 3 to rotate; it should be noted that after the metal is melted in the induction furnace body 3, the rotating module can drive the induction furnace body 3 to rotate toward the vacuum protection chamber 101, so as to facilitate the stable pouring of the molten liquid in the induction furnace body 3 through the material guide port 301.

[0055] Specifically, a receiving groove 4 is arranged on one side of the smelting box 1 close to the vacuum protection chamber 101, a liquid guiding groove 402 is arranged at the bottom of the receiving groove 4, the other end of the liquid guiding groove 402 extends into the vacuum protection chamber 101, a casting port 204 is arranged at the end of the liquid guiding groove 402, and a casting pipe 205 connected with the casting port 204 is arranged on the vacuum protection chamber 101; it can be explained that, in this embodiment, after the casting liquid in the induction furnace body 3 is poured out, the casting liquid first falls into the receiving groove 4, and then flows to the casting port 204 through the liquid guiding groove 402, and finally is discharged through the casting pipe 205 for casting.

[0056] In addition, a laser distance measuring system is provided on the liquid guiding groove 402 to detect the liquid level height in the liquid guiding groove 402. When the liquid level height reaches a preset value, the rotating module drives the induction furnace body 3 to reset to stop pouring the casting liquid.

[0057] It should also be noted that since the liquid guide groove 402 usually has a certain length, if the casting liquid contains impurities, the impurities will easily deposit when flowing in the liquid guide groove 402, making it difficult to clean. The casting liquid in this embodiment is filtered before entering the liquid guide groove 402, which can effectively avoid this phenomenon and extend the service life of the liquid guide groove 402.

[0058] It should be noted that a gate valve for separation is also provided at the connection end between the smelting box 1 and the vacuum protection chamber 101 , so as to separate or connect the smelting box 1 and the vacuum protection chamber 101 .

[0059] See also Figure 4-Figure 5 A filter box 401 is provided at the bottom of the receiving tank 4, a filter plate 403 is embedded in the filter box 401, and filter holes 404 are evenly arranged on the filter plate 403; specifically, the molten casting liquid is discharged into the filter box 401 after being discharged into the receiving tank 4, and the solid impurities generated in the casting liquid are filtered by the filter plate 403 arranged in the filter box 401, and the pure casting liquid can pass through the filter holes 404 and be discharged into the liquid guide tank 402.

[0060] A scraper module is also provided on one side of the filter box 401, and the scraper module is used to scrape impurities on the filter plate 403; it can be explained that after the filter plate 403 has been used for a period of time, the solid impurities attached to its surface due to filtering can be scraped off by the scraper module to avoid clogging of the filter holes 404 by these solid impurities and affecting the subsequent normal casting. When scraping, there is no need to manually open the smelting box 1 to remove the filter plate 403, and the smelting box 1 can be kept in a fully closed state, thereby avoiding gas exchange between the smelting box 1 and the outside world and achieving a continuous sealing effect.

[0061] It should be noted that the bottoms of the receiving groove 4 and the liquid guiding groove 402 are both inclined, and their heights gradually decrease from the smelting box 1 to the vacuum protection chamber 101 , so that the casting liquid can quickly flow to the casting port 204 .

[0062] Example 2

[0063] Based on Example 1, please refer to Figure 5-Figure 7 A filter frame 405 is slidably arranged on the filter plate 403, wherein through grooves 406 are provided on both side walls of the filter box 401, and the filter plate 403 and the filter frame 405 are slidably embedded in the through grooves 406; specifically, the filter frame 405 and the filter plate 403 in this embodiment are combined to form a material trough for storing solid impurities, and the filtered solid impurities can be directly stored in the material trough to achieve a pre-collection effect.

[0064] In this embodiment, please refer to Figure 7 and Fig.10 , slide grooves 511 are symmetrically provided on both sides of the filter plate 403, and a slide seat 504 slidably connected to the slide groove 511 is fixedly arranged at the bottom of the filter frame 405, wherein magnets with opposite magnetic poles are correspondingly embedded on the contact surfaces of the slide groove 511 and the slide seat 504; specifically, the filter frame 405 of this embodiment can slide along the slide groove 511 on the filter plate 403 through the slide seat 504, and accordingly, by arranging opposite-sex magnets on the contact surfaces of the two, the two can keep sliding against each other while having a certain adsorption force under the action of magnetic force, and the adsorption force can synchronously drive the other component to move when pulling any one of the filter frame 405 or the filter plate 403.

[0065] As a further solution of this embodiment, please refer to Figure 3 , Figure 5 and Figure 7, a screw 501 is also rotatably arranged in the smelting box 1, and the screw 501 is fixed to the output end of the servo motor 502 fixedly arranged on the outside of the smelting box 1, and a nut 503 is spirally sleeved on the screw 501, wherein support plates 508 are fixedly arranged at both ends of one side of the filter plate 403, and a limit plate 510 is vertically fixedly arranged on the support plate 508, and one side of the limit plate 510 is fixed to the nut 503 through a connecting rod; it can be explained that before scraping impurities on the surface of the filter plate 403, the servo motor 502 is started to drive the screw 501 to rotate, and the nut 503 can drive the filter plate 403 to be drawn out of the through groove 406 through the limit plate 510 and the support plate 508 during the movement of the screw 501, and based on the magnetic attraction of the filter frame 405 and the filter plate 403, the filter frame 405 can be synchronously driven to be synchronously drawn out, so as to facilitate the subsequent cleaning of impurities in the material trough.

[0066] In addition, in order to ensure the stability of the movement of the nut 503, a guide rail is provided on the inner wall of the smelting box 1 to guide the movement of the nut 503 so that it moves in a straight line.

[0067] In this embodiment, in order to prevent some solid impurities from being embedded in the filter hole 404 and causing blockage, please refer to Figure 5-Figure 7 , a top plate 6 is arranged on one side of the through slot 406, and a plurality of groups of top rods 601 corresponding to each filter hole 404 are fixedly arranged on the top plate 6, wherein the top rods 601 are connected to a lifting part that drives the top rods 601 to rise and fall; it can be explained that when the nut 503 drives the filter plate 403 to be drawn out of the through slot 406, the top rods 601 slide on the lower surface of the filter plate 403, and when the filter plate 403 moves to the top of the top plate 6, the lifting part can drive the top plate 6 to rise, so that the top rods 601 are embedded in each filter hole 404 one by one (see Figure 8 ), so as to push out the impurities in the filter hole 404. At this time, the top of the push rod 601 is flush with the upper surface of the filter plate 403, so as to facilitate the subsequent scraping.

[0068] Specifically, the lifting part includes a guide frame 602 fixedly arranged on both sides of the top plate 6, an inclined frame 603 is fixedly arranged at one end of the guide frame 602 away from the filter box 401, and the inclined frame 603 is inclined toward the bottom, and two groups of guide rods 604 are fixedly arranged on one side of the liquid guide groove 402, and two groups of guide seats 605 are slidably arranged on the guide rods 604, and the guide seats 605 are connected to the guide frame 602 through elastic telescopic parts, wherein a guide wheel 509 that rolls and abuts against the guide frame 602 is rotatably arranged at the bottom of the support plate 508; specifically, when the filter plate 403 is in a state of being embedded in the through groove 406, based on the setting of the guide wheel 509, the guide frame 602 can be pressed to move downward for a distance , thereby causing the elastic telescopic member to contract and generate elastic force. As the nut 503 drives the filter plate 403 to be pulled out of the through slot 406, the guide wheel 509 can move synchronously along the guide frame 602. When the guide wheel 509 moves to the position of the tilting frame 603 and as the filter plate 403 gradually moves to just above the top plate 6, the top plate 6 moves upward under the elastic drive of the elastic telescopic member until the top rod 601 is embedded in the filter hole 404. When the nut 503 drives the filter plate 403 to continue to move, the filter plate 403 can drive the top plate 6 to move synchronously through the engagement between the filter hole 404 and the top rod 601, and the top plate 6 drives the guide seat 605 to slide on the guide rod 604 through the elastic telescopic member.

[0069] In this embodiment, the elastic telescopic part includes a telescopic tube 606 fixedly arranged on the guide seat 605, and the telescopic end of the telescopic tube 606 is fixed to the side edge of the guide frame 602, wherein a first spring 607 is arranged on the telescopic end of the telescopic tube 606; specifically, one end of the first spring 607 is fixed to the side edge of the guide frame 602, and the other end is fixed to the cylinder body of the telescopic tube 606; it can be explained that the telescopic end can stretch or compress the first spring 607 during the process of telescoping in the telescopic tube 606, thereby generating elastic force.

[0070] Furthermore, when the push rod 601 is not embedded in the filter hole 404, in order to prevent the guide frame 602 from moving synchronously under the friction force with the guide wheel 509, in this embodiment, two sets of baffles 608 are fixedly arranged on one side of the liquid guide groove 402, and the baffles 608 are slidably fitted with the guide seat 605, wherein the contact surfaces of the baffles 608 and the guide seat 605 are respectively embedded with magnets with opposite magnetic poles; it can be explained that based on the attraction of the baffles 608 and the magnets on the guide seat 605, when the guide wheel 509 moves on the guide frame 602, the friction between the two is less than the adsorption force of the magnet, thereby allowing the guide frame 602 to remain stable;

[0071] Correspondingly, when the top rod 601 is embedded in the filter hole 404, the force of the engagement between the two is greater than the adsorption force of the magnet, so the top plate 6 can be driven to move synchronously when the filter plate 403 moves.

[0072] See also Figure 5-Figure 6, the scraper module includes a limit rod 407 fixedly arranged on the filter box 401, and a limit frame 408 is fixedly arranged at one end of the limit rod 407 away from the filter box 401, and the height of the limit frame 408 corresponds to the height of the filter frame 405, wherein the filter frame 405 is also fixedly provided with a guide column 506 slidably connected to the limit plate 510, and the guide columns 506 on both sides are fixed by the connecting frame 505, and a second spring 507 is arranged on the guide column 506; specifically, after the top rod 601 is embedded in the filter hole 404, as the nut 503 continues to drive the filter plate 403 to move, based on the setting of the limit frame 408, the filter frame 405 is blocked, so when it continues to move, the position of the filter frame 405 remains unchanged, and the filter plate 403 continues to move. In this process, the filter frame 405 and the filter plate 403 slide relative to each other, and the side wall of the filter frame 405 slides on the filter plate 403 During the process of scraping off all the solid impurities on the surface of the filter plate 403 (see Fig. 9 ), at this time, the limiting plate 510 can slide on the guide column 506 and compress the second spring 507. When the nut 503 drives the filter plate 403 to reset, the second spring 507 can drive the filter frame 405 to reset.

[0073] See also Figure 2-Figure 4 The rotating module includes a wedge-shaped plate 302 fixedly arranged on both sides of the induction furnace body 3, a support shaft 305 is fixedly arranged on one side of the wedge-shaped plate 302 close to the vacuum protection chamber 101, the support shaft 305 is fixed to one end of the U-shaped frame 303, the other end of the U-shaped frame 303 is fixed to the mounting plate 304, and the mounting plate 304 is fixed in the melting box 1, wherein the end of the support shaft 305 is fixedly arranged with a gear 306, and the melting box 1 is also symmetrically arranged with gears meshing with the gear 306. The racks 307 on both sides are fixed to the driving plate 308 through connecting rods, and a horizontal cylinder 102 fixed to the driving plate 308 is fixedly arranged on the outer side of the smelting box 1; it can be explained that, when the induction furnace body 3 is driven to rotate in this embodiment, the horizontal cylinder 102 is started, and the horizontal cylinder 102 drives the racks 307 on both sides to move horizontally through the driving plate 308, and the racks 307 drive the induction furnace body 3 to rotate by meshing with the gear 306, so as to pour out the casting liquid.

[0074] Also, see Figure 2-Figure 3 as well as Figure 5A stopper mechanism 203 corresponding to the casting port 204 is vertically arranged in the vacuum protection chamber 101, and the stopper mechanism 203 is fixed to the driving end of the lifting cylinder 103 fixedly arranged on the vacuum protection chamber 101. A crystallizer 201 is arranged at the bottom of the vacuum protection chamber 101, and a receiving pipe 202 which is in communication with the casting pipe 205 is arranged on the crystallizer 201. A continuous casting machine 2 is arranged at the bottom of the crystallizer 201. Specifically, during casting, the stopper mechanism 203 is driven by the lifting cylinder 103 to move upward. When it rises to a preset height, the casting liquid can enter the crystallizer 201 along the casting port 204, the casting tube 205 and the receiving tube 202, and the metal is formed by cooperating with the continuous casting machine 2. The forming technology is a prior art and will not be elaborated on. Accordingly, an eddy current liquid level sensor can be provided on the crystallizer 201 to detect the liquid level height in the crystallizer 201. After reaching the corresponding height, the stopper mechanism 203 is driven to descend by the lifting cylinder 103 to close the casting port 204.

[0075] See also Figure 1 and Figure 5 A collecting box 5 for collecting waste is provided at the bottom of the filter box 401. The collecting box 5 is slidably arranged in the smelting box body 1. A material taking port 104 is opened on the side wall of the smelting box body 1. A sealing door 105 is embedded in the material taking port 104. Specifically, when a predetermined amount of waste impurities is collected in the collecting box 5, the sealing door 105 is opened, and the collecting box 5 is taken out from the material taking port 104 to facilitate the subsequent collection of waste.

[0076] A protective atmosphere continuous casting method for vacuum melting equipment comprises the following steps:

[0077] S1. Please refer to Figure 1-Figure 2 , placing the metal to be molten in the induction furnace body 3;

[0078] S2, the vacuum equipment performs vacuum treatment on the smelting box 1 and the vacuum protection chamber 101. After vacuum treatment, the inert gas supply equipment provides protective gas to the smelting box 1 and the vacuum protection chamber 101;

[0079] S3, energizing the induction furnace body 3 to melt the metal to form a casting liquid;

[0080] S4, the rotating module drives the induction furnace body 3 to rotate toward the vacuum protection chamber 101, and pours the molten liquid in the induction furnace body 3 out through the material guide port 301;

[0081] S5. Please refer to Figure 3-Figure 5 The casting liquid first falls into the receiving tank 4. When it falls into the filter box 401, the solid impurities generated in the casting liquid are filtered through the filter plate 403 arranged in the filter box 401. The pure casting liquid passes through the filter hole 404 and is discharged into the liquid guide tank 402 for casting.

[0082] S6. After the primary casting is completed, the rotating module drives the induction furnace body 3 to reset, and the scraping module scrapes off the impurities on the filter plate 403.

[0083] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0084] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A vacuum smelting device, comprising a smelting box (1), wherein an induction furnace (3) for molten metal is arranged in the smelting box, and a vacuum protection chamber (101) is fixedly arranged on one side of the smelting box (1); It is characterized in that A receiving groove (4) is provided on one side of the smelting box (1) close to the vacuum protection chamber (101), a liquid guide groove (402) is provided at the bottom of the receiving groove (4), and the other end of the liquid guide groove (402) extends into the vacuum protection chamber (101); A filter box (401) is provided at the bottom of the receiving tank (4), a filter plate (403) is embedded in the filter box (401), and filter holes (404) are evenly arranged on the filter plate (403); A scraper module is also provided on one side of the filter box (401), and the scraper module is used to scrape impurities on the filter plate (403); a filter frame (405) is slidably arranged on the filter plate (403); through grooves (406) are provided on both side walls of the filter box (401), and the filter plate (403) and the filter frame (405) are slidably embedded in the through grooves (406); A screw rod (501) is also rotatably arranged in the smelting box (1), the screw rod (501) is fixed to the output end of a servo motor (502) fixedly arranged outside the smelting box (1), and a nut (503) is spirally sleeved on the screw rod (501); support plates (508) are respectively fixedly arranged at both ends of one side of the filter plate (403), and a limit plate (510) is vertically fixedly arranged on the support plate (508), and one side of the limit plate (510) is fixed to the nut (503) through a connecting rod; a top plate (6) is arranged on one side of the through slot (406), and a plurality of groups of top rods (601) corresponding to each filter hole (404) are fixedly arranged on the top plate (6); the top rods (601) are connected to a lifting part that drives the top rods to rise and fall; The lifting part comprises a guide frame (602) fixedly arranged on both sides of the top plate (6); an inclined frame (603) is fixedly arranged at one end of the guide frame (602) away from the filter box (401); the inclined frame (603) is inclined toward the bottom; two groups of guide rods (604) are fixedly arranged on one side of the liquid guide groove (402); two groups of guide seats (605) are slidably arranged on the guide rods (604); the guide seats (605) are connected to the guide frame (602) via elastic telescopic parts; and a guide wheel (509) is rotatably arranged at the bottom of the support plate (508) and is in rolling contact with the guide frame (602).

2. A vacuum melting equipment according to claim 1, characterized in that: A material guide port (301) is arranged on a side of the induction furnace body (3) facing the vacuum protection chamber (101), and a rotating module is also arranged in the smelting box body (1) for driving the induction furnace body (3) to rotate.

3. A vacuum melting equipment according to claim 1, characterized in that: The filter plate (403) has sliding grooves (511) symmetrically arranged on both sides, and a sliding seat (504) slidably connected to the sliding grooves (511) is correspondingly fixedly arranged on the bottom of the filter frame (405); Wherein, magnets with opposite magnetic poles are respectively embedded on the contact surfaces of the slide groove (511) and the slide seat (504).

4. A vacuum melting equipment according to claim 1, characterized in that: Two groups of baffles (608) are fixedly arranged on one side of the liquid guide groove (402), and the baffles (608) are slidably fitted with the guide seat (605); Wherein, the contact surfaces of the baffle (608) and the guide seat (605) are respectively embedded with magnets with opposite magnetic poles.

5. A vacuum melting equipment according to claim 1, characterized in that: The scraper module comprises a limiting rod (407) fixedly arranged on the filter box (401), a limiting frame (408) fixedly arranged on one end of the limiting rod (407) away from the filter box (401), and a height of the limiting frame (408) corresponding to a height of the filter frame (405); The filter frame (405) is also fixedly provided with guide posts (506) slidably connected to the limit plate. The guide posts (506) on both sides are fixed by a connecting frame (505). A second spring (507) is provided on the guide posts (506).

6. A protective atmosphere continuous casting method of the vacuum melting equipment according to any one of claims 1 to 5, characterized in that: The steps include: S1, placing the metal to be melted in the induction furnace (3); S2, the vacuum equipment performs vacuum treatment on the melting box (1) and the vacuum protection chamber (101), and after vacuum treatment, the inert gas supply equipment provides protective gas to the melting box (1) and the vacuum protection chamber (101); S3, energizing the induction furnace (3) to melt the metal to form a casting liquid; S4, the rotating module drives the induction furnace body (3) to rotate toward the vacuum protection chamber (101), and pours the molten liquid in the induction furnace body (3) out through the material guide port (301); S5, the casting liquid first falls into the receiving groove (4), and when it falls into the filter box (401), the solid impurities generated in the casting liquid are filtered through the filter plate (403) arranged in the filter box (401), and the pure casting liquid passes through the filter hole (404) and is discharged into the liquid guide groove (402) for casting; S6. After the primary casting is completed, the rotating module drives the induction furnace body (3) to reset, and the scraping module scrapes away the impurities on the filter plate (403).

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