A high-temperature furnace opening and closing plate observation window structure for preventing sputtering of molten metal

Abstract

The present invention discloses a high-temperature furnace opening and closing plate observation window structure for preventing molten metal splashing, which relates to the technical field of metal smelting. It includes a high-temperature furnace with an opening and closing plate. An installation hole is provided on the opening and closing plate, and a transparent protective glass is installed in the inner cavity of the installation hole. It also includes a shielding unit, a delay unit, a detection and triggering unit, and a controller installed in the inner cavity of the opening and closing plate. The shielding unit, the delay unit, the detection and triggering unit, the controller, and the external power supply are connected in series in sequence to form a circuit. This structure uses a tuning fork to detect the explosion frequency of the molten metal and vibrates, causing the slider of the delay unit to move through magnetic force. After the first electromagnet circuit is connected, the shielding plate is pushed through magnetic force to perform a rapid gathering movement at the moment when the molten metal boils and explodes, which can effectively prevent the molten metal from splashing onto the transparent protective glass and causing a decrease in its clarity, and can automatically control the circuit to disconnect.

Description

Technical Field

[0001] The invention relates to the technical field of metal smelting, and in particular to an opening and closing plate observation window structure of a high-temperature furnace for preventing molten metal from splashing. Background Art

[0002] High temperature furnaces are mainly used for heating and heat treatment in laboratories of industrial and mining enterprises, scientific research institutions, and are indispensable instruments and equipment in various laboratories.

[0003] In order to understand the internal metal melting state, existing high-temperature furnaces are generally equipped with observation windows, and explosion-proof glass and fire-proof glass are arranged in the observation windows. The observation windows currently on the market focus on ensuring the safety of the windows under high temperature and high pressure conditions, but fail to solve the problem that when melting metal, the liquid splashing in the furnace (the molten metal in the crucible of the furnace body) impacts and melts the glass, causing the clarity of the glass to decrease, thereby affecting its use. Therefore, the present application provides an observation window structure suitable for high-temperature furnaces to meet the needs. Summary of the invention

[0004] The purpose of the present application is to provide an opening and closing plate observation window structure for a high-temperature furnace that can prevent molten metal from splashing. The structure uses a tuning fork to detect the explosion frequency of the molten metal and vibrate to move the slider of the delay unit through magnetic force. After the first electromagnet circuit is turned on, the shield is pushed by magnetic force to perform a rapid gathering movement at the moment of the molten metal boiling and explosion. This can effectively prevent the molten metal from splashing onto the transparent protective glass and causing its clarity to decrease. At the same time, when the molten metal no longer boils and explodes, the circuit can be automatically controlled to be disconnected through the self-sliding of the slider without manual operation, making the high-temperature furnace more intelligent.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a high-temperature furnace opening and closing plate observation window structure for preventing molten metal from splashing, comprising a high-temperature furnace with an opening and closing plate, a mounting hole being provided on the opening and closing plate, and a transparent protective glass being installed in the inner cavity of the mounting hole, and further comprising a shielding unit, a delay unit, a detection trigger unit installed in the inner cavity of the opening and closing plate, and a controller arranged on the outer wall of the opening and closing plate and electrically connected to an external power supply, wherein the shielding unit, the delay unit, the detection trigger unit, the controller and the external power supply are connected in series in sequence to form a circuit;

[0006] Detection trigger unit: used to detect the sound frequency generated when the metal liquid boils and explodes, and control the shielding unit to shield the transparent protective glass through the delay unit;

[0007] Delay unit: used to control the shielding unit to be powered on to perform shielding operation and control the shielding time of the shielding unit on the transparent protective glass. After the boiling explosion of the molten metal ends, the shielding unit can automatically release the shielding of the transparent protective glass;

[0008] Blocking unit: When the molten metal boils and explodes, it is used to block the transparent protective glass to prevent the molten metal from splashing onto the transparent protective glass and causing damage to the transparent protective glass.

[0009] Preferably, the detection trigger unit includes a tuning fork and an L-shaped conductive rod installed in the inner cavity of the rectangular frame through an insulating plate. The vibration frequency of the tuning fork is consistent with the audio frequency when the molten metal boils and explodes. The contact end of the L-shaped conductive rod penetrates the rectangular frame, and the wiring end of the tuning fork penetrates the insulating plate and extends into the inner cavity of the opening and closing plate;

[0010] The blocking unit includes a first electromagnet and two first permanent magnets, both of which are arranged on the opposite inner walls of the inner cavity of the rectangular magnetic shielding plate. Two shielding plates that can block the transparent protective glass are slidably arranged between the two first electromagnets. First heat insulation protection layers are fixed on the far ends of the two shielding plates, and a second permanent magnet is installed in the inner cavity of the heat insulation protection layer. Partition plates are fixed on the outer ends of the two shielding plates, and heat insulation layers are arranged on the opposite ends of the two partition plates and the inner cavity wall of the rectangular magnetic shielding plate;

[0011] The delay unit includes an inclined first guide groove and a second guide groove. Chutes and conductive sheets are respectively arranged on the opposite inner walls of the first guide groove. Chutes are respectively arranged on the opposite inner walls of the second guide groove. A slider is slidably arranged in the inner cavity of the second guide groove. Both ends of the slider are slidably connected to the chutes through slide bars. First balls are arranged at the upper and lower ends of the two slide bars. A second electromagnet is fixedly embedded on the second guide groove. A third permanent magnet is fixed on the end surface of the slider opposite to the second electromagnet. Two spring thimbles that are electrically connected together are fixed on the other end surface of the slider, and the outer ends of the two spring thimbles are slidably in contact with the inner wall of the second guide groove;

[0012] The two conductive sheets are respectively electrically connected to the two first electromagnets, and the two first electromagnets are electrically connected. The tuning fork, the second electromagnet, the L-shaped conductive rod and the external power supply are connected in series in sequence.

[0013] Preferably, second balls are installed on the upper, lower, front and rear end faces of the two shielding plates.

[0014] Preferably, an installation groove is arranged at one end of one of the shielding plates close to the transparent protective glass, and an elastic buffer made of heat-resistant material is installed in the installation groove, and the right end of the elastic buffer extends beyond the right end of the shielding plate.

[0015] Preferably, an elastic magnetic ring is fixed on the inner wall of the second guiding groove, and the elastic magnetic ring is arranged around the second electromagnet. The inner diameter of the elastic magnetic ring is smaller than the diameter of the third permanent magnet.

[0016] Preferably, a blanking opening is formed at the bottom of the rectangular magnetic separation plate, and the discharge port of the blanking opening is hermetically sealed by a sealing block in a threaded manner. A guiding arc surface is arranged at the edge of the rectangular magnetic separation plate close to the blanking opening. A guiding semi - ring connected with the blanking opening is installed in the inner cavity of the installation hole, and the end surface of the guiding semi - ring close to the shielding plate is arranged as an inclined surface.

[0017] Preferably, a triangular guiding block is arranged in the inner cavity of the blanking opening. The inclined surface of the guiding block faces upward, and the lowest end of the inclined surface of the guiding block is close to the sealing block.

[0018] In summary, the technical effects and advantages of the present invention are as follows:

[0019] The structure of the present invention is reasonable. This structure uses a tuning fork to detect the explosion frequency of molten metal and vibrates, causing the slider of the time - delay unit to move by magnetic force. After the first electromagnet circuit is connected, it uses magnetic force to push the shielding plate to perform a rapid gathering movement at the moment when the molten metal boils and explodes, which can effectively prevent the molten metal from splashing onto the transparent protective glass and causing a decrease in its clarity. At the same time, when the molten metal no longer boils and explodes, the circuit can be automatically disconnected by the self - sliding of the slider without manual operation, making this high - temperature furnace more intelligent;

[0020] In the present invention, a blanking opening, a sealing block for sealing the discharge port of the blanking opening, and a guiding semi - ring are provided. The basically solidified metal scraped off falls into the blanking opening for collection through the guiding action of contacting the inclined surface of the guiding semi - ring. The metal in the blanking opening can be taken out by unscrewing the sealing block to open the discharge port, which is convenient for collecting metal slag;

[0021] In the present invention, a triangular guiding block is arranged in the inner cavity of the blanking opening. The inclined surface of the guiding block faces upward, and the lowest end of the inclined surface of the guiding block is close to the sealing block. The metal slag falls into the blanking opening and can move along the inclined surface of the guiding block for guiding, making the metal slag gather towards the discharge port, which is convenient for discharging the metal slag in the blanking opening;

[0022] In the present invention, an elastic magnetic ring is fixed on the inner wall of the second guiding groove, which can collide and buffer with the elastic magnetic ring, avoiding the hard collision between the slider and the inner wall of the second guiding groove, resulting in the reverse movement of the slider into the first guiding groove, so that the two shielding plates form a shield for the transparent protective glass again only under the push of magnetic force;

[0023] In the present invention, an elastic buffer is provided, which can reduce the collision noise, and at the same time reduce the collision intensity between the two shielding plates, improving the service life of the shielding plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 Schematic diagram of the rear view structure of the opening and closing plate of the present invention;

[0027] Figure 3 For the present invention Figure 2 Schematic diagram of the sectional structure of the opening and closing plate in the present invention;

[0028] Figure 4 For the present invention Figure 3 Schematic diagram of the middle shielding plate structure;

[0029] Figure 5 For the present invention Figure 3 Schematic diagram of the detection trigger unit structure in the present invention;

[0030] Figure 6 For the present invention Figure 3 Schematic diagram of the delay unit structure in the present invention;

[0031] Figure 7 For the present invention Figure 6 Schematic diagram of the first guide groove structure in the present invention;

[0032] Figure 8 For the present invention Figure 6 Schematic diagram of the second guide groove structure in the present invention;

[0033] Figure 9 For the present invention Figure 6 Schematic diagram of the front view slider structure in the present invention;

[0034] Figure 10 For the present invention Figure 6 Schematic diagram of the rear view structure of the slider in the present invention;

[0035] Figure 11 The present invention Figure 2 Schematic diagram of the partial sectional structure of the opening and closing plate in the present invention;

[0036] Figure 12 For the present invention Figure 11 Schematic diagram of the enlarged structure at A in the present invention;

[0037] Figure 13This is a position diagram of the guide semicircular ring and the shield plate of the present invention;

[0038] Figure 14 For the present invention Figure 4 Cross-sectional structure diagram of the middle thermal insulation protective layer.

[0039] In the figure: 1, high temperature furnace; 2, opening and closing plate; 3, transparent protective glass; 4, shielding unit; 41, shielding plate; 42, first permanent magnet; 43, first electromagnet; 44, heat insulation protection layer; 45, second permanent magnet; 46, second ball; 47, elastic buffer; 5, heat insulation layer; 6, rectangular magnetic isolation plate; 7, circular frame; 8, delay unit; 81, first guide groove; 82, second guide groove; 83, slide groove; 84, second Electromagnet; 85, slider; 86, third permanent magnet; 87, spring ejector; 88, slide bar; 89, first ball; 810, elastic magnetic ring; 811, conductive sheet; 9, detection trigger unit; 91, tuning fork; 92, insulating plate; 93, L-shaped conductive rod; 94, insulating sleeve; 10, controller; 11, sealing block; 12, guide arc surface; 13, feed opening; 14, guide block; 15, partition; 16, guide semicircular ring. DETAILED DESCRIPTION

[0040] 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.

[0041] Example: Reference Figures 1 - 3 The structure of a high-temperature furnace opening and closing plate observation window for preventing molten metal from splashing is shown, comprising a high-temperature furnace 1 with an opening and closing plate 2, a mounting hole is provided on the opening and closing plate 2, and a transparent protective glass 3 is installed in the inner cavity of the mounting hole, and also comprises a shielding unit 4 installed in the inner cavity of the opening and closing plate 2, a delay unit 8, a detection trigger unit 9, and a controller 10 arranged on the outer wall of the opening and closing plate 2 and electrically connected to an external power supply, wherein the shielding unit 4, the delay unit 8, the detection trigger unit 9, the controller 10 and the external power supply are connected in series in sequence to form a circuit; the detection trigger unit 9: for metal The sound frequency generated during the boiling and explosion of the molten metal controls the shielding unit 4 to shield the transparent protective glass 3 through the delay unit 8; the delay unit 8 is used to control the shielding unit 4 to power on for shielding operation and control the shielding time of the transparent protective glass 3 by the shielding unit 4. After the boiling and explosion of the molten metal ends, the shielding unit 4 can automatically release the shielding of the transparent protective glass 3; the shielding unit 4 is used to shield the transparent protective glass 3 when the molten metal boils and explodes to prevent the molten metal from splashing onto the transparent protective glass 3 and causing damage to the transparent protective glass 3.

[0042] As a preferred implementation manner in this embodiment, such as Figures 4 - 10 and Figure 14As shown, the detection trigger unit 9 includes a tuning fork 91 and an L-shaped conductive rod 93 installed in the inner cavity of the loop-shaped frame 7 through an insulating plate 92. The vibration frequency of the tuning fork 91 is consistent with the audio frequency when the molten metal boils and explodes. The contact end of the L-shaped conductive rod 93 penetrates the loop-shaped frame 7, and the wiring end of the tuning fork 91 penetrates the insulating plate 92 and extends into the inner cavity of the opening and closing plate 2. The shielding unit 4 includes a first electromagnet 43 and two first permanent magnets 42 both arranged on the opposite inner walls of the inner cavity of the rectangular magnetic shielding plate 6. Two shielding plates 41 that can shield the transparent protective glass 3 are slidably arranged between the two first electromagnets 43. A first heat insulation protective layer 44 is fixed on the far ends of the two shielding plates 41, and a second permanent magnet 45 is installed in the inner cavity of the heat insulation protective layer 44. Partition plates 15 are fixed on the outer ends of the two shielding plates 41, and heat insulation layers 5 are arranged on the opposite ends of the two partition plates 15 and the inner cavity wall of the rectangular magnetic shielding plate 6. The delay unit 8 includes an inclined first guiding groove 81 and a second guiding groove 82. Sliding grooves 83 and conductive sheets 811 are opened on the opposite inner walls of the first guiding groove 81. Sliding grooves 83 are opened on the opposite inner walls of the second guiding groove 82. A slider 85 is slidably arranged in the inner cavity of the second guiding groove 82. Both ends of the slider 85 are slidably connected with the sliding grooves 83 through sliding strips 88. First balls 89 are arranged at the upper and lower ends of the two sliding strips 88. A second electromagnet 84 is fixedly embedded on the second guiding groove 82. A third permanent magnet 86 is fixed on the end surface of the slider 85 opposite to the second electromagnet 84. Two spring-loaded pins 87 that are electrically connected together are fixed on the other end surface of the slider 85, and the outer ends of the two spring-loaded pins 87 are slidably in contact with the inner wall of the second guiding groove 82. The two conductive sheets 811 are electrically connected to the two first electromagnets 43 respectively, and the two first electromagnets 43 are electrically connected. The tuning fork 91, the second electromagnet 84, the L-shaped conductive rod 93 and the external power supply are connected in series in turn. When using this high-temperature furnace 1 to heat the metal, when the molten metal is heated to boiling to generate a steam drum and explodes, the tuning fork 91 will vibrate. The vibrating tuning fork 91 will contact the L-shaped conductive rod 93, so that the circuit of the second electromagnet 84 is connected. Through the principle of like poles repelling each other (the end surface magnetic poles of the second electromagnet 84 and the third permanent magnet 86 are the same), the slider 85 moves upward along the inclined plane under the action of the magnetic field. When the slider 85 moves to the second guiding groove 82, the two spring-loaded pins 87 arranged on it will respectively contact the two conductive sheets 811. At this time, the circuits of the two first electromagnets 43 are connected. Through the principle of like poles repelling each other (the end surface magnetic poles of the first electromagnet 43 and the relatively arranged second permanent magnet 45 are the same), the two shielding plates 41 move together instantaneously, and can instantaneously shield the transparent protective glass. When no steam drum explosion occurs, the tuning fork 91 stops vibrating and the tuning fork 91 separates from the L-shaped conductive rod 93, and the second electromagnet 84 is powered off. At this time, the slider 85 slides down along its inclined plane under the action of its own gravity. When the slider 85 moves into the second guiding groove 82, the spring-loaded pin 87 separates from the conductive sheet 811. At this time,On the end face of the first electromagnet 43, the first permanent magnet 42 can drive the two shutter plates 41 to move away from each other respectively through the principle of attraction between opposite magnetic poles, releasing the shielding of the transparent protective glass 3. At the same time, the metal adhered to the shutter plate 41 (since it takes a certain amount of time for the shutter plate 41 to close, and the outer surface of the metal has been basically solidified during this period) can be scraped off by the inner wall of the mounting hole with the mounting hole. This structure uses a tuning fork to detect the explosion frequency of the molten metal and vibrates, causing the slider 85 of the delay unit 8 to move by magnetic force. After the circuit of the first electromagnet 43 is connected, the shutter plate 41 is pushed by magnetic force to perform a rapid gathering movement at the moment when the molten metal boils and explodes, which can effectively prevent the molten metal from splashing onto the transparent protective glass 3 and causing a decrease in its clarity. At the same time, when the molten metal no longer boils and explodes, the circuit can be automatically disconnected by the self-sliding of the slider 85 without manual operation, making this high-temperature furnace more intelligent.

[0043] It should be noted that: First, the shielding unit 4, the delay unit 8, and the detection and triggering unit 9 are all arranged in the inner cavity of the heat insulation layer 5 of the rectangular structure of the opening and closing plate 2. Cooperating with the rectangular magnetic insulation plate 6 (which plays a role in isolating magnetism and can prevent the first permanent magnet 42, the first electromagnet 43, and the third permanent magnet 86 arranged below from affecting the movement of the slider 85) and the heat insulation layer 5 on the partition plate 15 to isolate heat from the first permanent magnet 42, the first electromagnet 43, the second electromagnet 84, and the third permanent magnet 86, which can prevent the occurrence of high-temperature demagnetization. The heat insulation protection layer 44 is used to insulate the second permanent magnet 45 from heat, which also prevents high-temperature demagnetization. The heat insulation layer 5 and the heat insulation protection layer 44 can both be made of aerogel materials, which can isolate high temperatures up to 1200°. Therefore, the melting temperature of the metal in this furnace body shall not exceed 1200°, such as being applicable to the melting of copper. Second, insulating sleeves are sleeved on the parts where the L-shaped conducting rod 93 and the wiring terminal of the tuning fork 91 penetrate through the return frame 7 to prevent electric leakage. Third, the return frame 7 can be sealed with a sealing thin plate to prevent the molten metal from splashing onto the tuning fork 91 and thus affecting its vibration. For the tuning fork directly exposed to the air, after the tuning fork 91 is sealed, due to the sealing thin plate blocking the sound wave, the vibration amplitude and intensity generated during detection will decrease. Fourth, conductive balls are rollingly arranged on the contact end of the spring ejector pin 87 to reduce the friction between it and the conductive sheet 811. Fifth, the shutter plate 41 is pushed by magnetic force for shielding operation, and the shutter plate 41 responds quickly. At the same time, the magnetic force components occupy less space.

[0044] As a preferred implementation manner in this embodiment, as Figure 4 shown, second balls 46 are installed on the upper and lower, front and rear end faces of the two shutter plates 41. The second balls 46 are used to reduce the frictional force with the opening and closing plate 2, reduce the movement resistance of the shutter plate 41, and facilitate the rapid movement of the shutter plate 41.

[0045] As a preferred implementation manner in this embodiment, as Figure 4 shown, an installation groove is provided at one end of one of the shutters 41 close to the transparent protective glass 3, and an elastic buffer 47 made of heat-resistant material is installed in the installation groove, and the right end of the elastic buffer 47 extends beyond the right end of the shutter 41. When the two shutters 41 are quickly gathered under the push of magnetic force, in order to prevent large collision noises, the provided elastic buffer 47 can be used for collision buffering, which can reduce the collision noise and at the same time reduce the collision intensity between the two shutters 41 and improve the service life of the shutter 41.

[0046] It should be noted that the elastic buffer 47 can be made of aerogel material, which has good heat resistance and heat insulation.

[0047] As a preferred implementation manner in this embodiment, as Figure 8 shown, an elastic magnetic ring 810 is fixed on the inner wall of the second guide groove 82, and the elastic magnetic ring 810 is arranged outside the second electromagnet 84. The inner diameter of the elastic magnetic ring 810 is smaller than the diameter of the third permanent magnet 86. When the molten metal boils and the slider 85 moves along the inclined plane into the second guide groove 82, it can collide and buffer with the elastic magnetic ring 810, avoiding hard collision between the slider 85 and the inner wall of the second guide groove 82, which may cause the slider 85 to move reversely into the first guide groove 81 and cause the two shutters 41 to form a shield for the transparent protective glass 3 again only under the push of magnetic force.

[0048] It should be noted that the elastic magnetic ring 810 is composed of a heat-resistant ring body and a ring magnet arranged on the temporal part of the heat-resistant ring body, and the heat-resistant ring body is made of aerogel material.

[0049] As a preferred implementation manner in this embodiment, as Figure 11 , Figure 12 shown, a blanking opening 13 is opened at the bottom of the rectangular magnetic separation plate 6, and the discharge port of the blanking opening 13 is thread-sealed by a sealing block 11. A guiding arc surface 12 is provided at the edge of the rectangular magnetic separation plate 6 close to the blanking opening 13. A guiding semi-ring 16 connected to the blanking opening 13 is installed in the inner cavity of the installation hole, and the end surface of the guiding semi-ring 16 close to the shutter 41 is set as an inclined surface. The basically solidified metal scraped off falls into the blanking opening 13 through the guiding action of contacting the inclined surface of the guiding semi-ring 16 for collection. The sealing block 11 can be unscrewed to open the discharge port to take out the metal in the blanking opening 13, which is convenient for collecting the metal slag.

[0050] It should be noted that, one, two guiding semi-rings 16 can be provided, which are respectively located on both sides of the shutter 41, as Figure 13As shown, the probability of metal falling into the material discharge opening 13 can be increased; secondly, the guide arc surface 12 plays a guiding role, making it easier for metal slag to fall into the material discharge opening 13.

[0051] As a preferred implementation in this embodiment, Figure 12 As shown, the inner cavity of the discharge opening 13 is provided with a triangular guide block 14, and the inclined surface of the guide block 14 is arranged upward, and the lowest end of the inclined surface of the guide block 14 is close to the sealing block 11. The metal slag falls into the discharge opening 13 and can extend the inclined surface of the guide block 14 for guided movement, so that the metal slag gathers toward the discharge port, which is convenient for discharging the metal slag in the discharge opening 13.

[0052] Working principle of the present invention: when the high temperature furnace 1 is used to heat the metal, when the molten state is heated to boiling to generate a steam drum and an explosion occurs, the tuning fork 91 will vibrate, and the vibrating tuning fork 91 will contact the L-shaped conductive rod 93, so that the circuit of the second electromagnet 84 is connected. Through the principle of repulsion of like magnetic poles (the end surface magnetic poles of the second electromagnet 84 and the opposite end of the third permanent magnet 86 are the same), the slider 85 moves upward along the inclined surface under the action of the magnetic field. When the slider 85 moves to the second guide groove 82, The two spring pins 87 disposed thereon will contact the two conductive sheets 811 respectively. At this time, the circuits of the two first electromagnets 43 are connected. Based on the principle of magnetic poles of the same name repelling each other (the end surface magnetic poles of the first electromagnet 43 and the opposite end of the second permanent magnet 45 disposed oppositely are the same), the two shielding plates 41 simultaneously and instantly move together to instantly shield the transparent protective glass 3. When no steam drum explosion occurs, the tuning fork 91 stops vibrating, the tuning fork 91 contacts and separates from the L-shaped conductive rod 93, and the second electromagnet 84 is powered off. At this time, the slider 85 is turned on. The slider 85 slides down along its inclined surface due to its own gravity. When the slider 85 moves into the second guide groove 82, the spring ejector pin 87 contacts and separates from the conductive sheet 811. At this time, the end surface of the first electromagnet 43 and the first permanent magnet 42 can respectively drive the two shielding plates 41 to move in opposite directions through the principle of attraction between opposite magnetic poles, thereby removing the shielding of the transparent protective glass 3. At the same time, the metal on the shielding plate 41 (because the closing of the shielding plate 41 takes a period of time, the metal surface has been basically solidified during this period of time) can be scraped off the inner wall of the mounting hole where the mounting hole is installed. The structure uses a tuning fork to detect the explosion frequency of the molten metal and vibrate to make the slider 85 of the delay unit 8 move through the magnetic force. After the circuit of the first electromagnet 43 is turned on, the shielding plate 41 is pushed by the magnetic force to perform a rapid gathering movement at the moment when the molten metal boils and explodes, which can effectively prevent the molten metal from splashing onto the transparent protective glass 3 and causing its clarity to decrease. At the same time, when the molten metal no longer boils and explodes, the self-sliding automatic control circuit of the slider 85 can be disconnected without manual operation, making the high-temperature furnace more intelligent.

[0053] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-temperature furnace opening and closing plate observation window structure for preventing sputtering of molten metal liquid, comprising a high-temperature furnace (1) with an opening and closing plate (2), wherein an installation hole is formed in the opening and closing plate (2), and a transparent protective glass (3) is installed in the inner cavity of the installation hole, and it is characterized in that: It also includes a shielding unit (4), a delay unit (8), a detection trigger unit (9) installed in the inner cavity of the opening and closing plate (2), and a controller (10) arranged on the outer wall of the opening and closing plate (2) and electrically connected to an external power supply, wherein the shielding unit (4), the delay unit (8), the detection trigger unit (9), the controller (10) and the external power supply are connected in series in sequence to form a loop; A detection trigger unit (9) is used to detect the sound frequency generated when the metal liquid boils and explodes, and to control the shielding unit (4) through the delay unit (8) to perform a shielding and protection operation on the transparent protective glass (3); A delay unit (8) is used to control the shielding unit (4) to be powered on to perform a shielding operation and to control the shielding time of the shielding unit (4) on the transparent protective glass (3); after the boiling explosion of the molten metal ends, the shielding unit (4) can automatically release the shielding of the transparent protective glass (3); A shielding unit (4) is used to shield the transparent protective glass (3) when the molten metal boils and explodes, so as to prevent the molten metal from splashing onto the transparent protective glass (3) and causing damage to the transparent protective glass (3); The detection trigger unit (9) comprises a tuning fork (91) and an L-shaped conductive rod (93) installed in the inner cavity of the circular frame (7) via an insulating plate (92); the vibration frequency of the tuning fork (91) is consistent with the audio frequency when the metal liquid boils and explodes; the contact end of the L-shaped conductive rod (93) passes through the circular frame (7); and the connection end of the tuning fork (91) passes through the insulating plate (92) and extends to the inner cavity of the opening and closing plate (2); The shielding unit (4) comprises a first electromagnet (43) and two first permanent magnets (42) arranged on opposite inner walls of the inner cavity of a rectangular magnetic isolation plate (6); two shielding plates (41) are slidably arranged between the two first electromagnets (43) for shielding the transparent protective glass (3); a first heat-insulating protective layer (44) is fixed on the distal ends of the two shielding plates (41); a second permanent magnet (45) is installed in the inner cavity of the heat-insulating protective layer (44); a partition plate (15) is fixed on the outer ends of the two shielding plates (41); and a heat-insulating layer (5) is arranged on the opposite ends of the two partition plates (15) and the inner cavity wall of the rectangular magnetic isolation plate (6).

2. The high-temperature furnace opening and closing plate observation window structure for preventing molten metal splash according to claim 1, wherein: The delay unit (8) includes a first guiding groove (81) and a second guiding groove (82) which are obliquely arranged. Sliding grooves (83) and conductive sheets (811) are formed on the opposite inner walls of the first guiding groove (81). Sliding grooves (83) are formed on the opposite inner walls of the second guiding groove (82). A slider (85) is slidably arranged in the inner cavity of the second guiding groove (82). Both ends of the slider (85) are slidably connected with the sliding grooves (83) through sliding bars (88). First balls (89) are arranged at the upper and lower ends of the two sliding bars (88). A second electromagnet (84) is fixedly embedded on the second guiding groove (82). A third permanent magnet (86) is fixed on the end face of the slider (85) opposite to the second electromagnet (84). Two spring pins (87) which are electrically connected together are fixed on the other end face of the slider (85). The outer ends of the two spring pins (87) are in sliding contact with the inner wall of the second guiding groove (82). The two conductive sheets (811) are respectively electrically connected with the two first electromagnets (43). The two first electromagnets (43) are electrically connected with each other. The tuning fork (91), the second electromagnet (84), the L-shaped conductive rod (93) and the external power supply are connected in series in sequence.

3. The high-temperature furnace opening and closing plate observation window structure for preventing molten metal liquid sputtering according to claim 1, characterized in that: Second balls (46) are installed on the upper, lower, front and rear end faces of the two shielding plates (41).

4. The high-temperature furnace opening and closing plate observation window structure for preventing molten metal splash according to claim 1, characterized in that: An installation groove is arranged at one end of one of the shielding plates (41) close to the transparent protective glass (3). An elastic buffer (47) made of heat-resistant material is installed in the installation groove. The right end of the elastic buffer (47) extends beyond the right end of the shielding plate (41).

5. The high-temperature furnace opening and closing plate observation window structure for preventing molten metal splashing according to claim 2, characterized in that: An elastic magnetic ring (810) is fixed on the inner wall of the second guiding groove (82). The elastic magnetic ring (810) is arranged on the periphery of the second electromagnet (84). The inner diameter of the elastic magnetic ring (810) is smaller than the diameter of the third permanent magnet (86).

6. The high-temperature furnace opening and closing plate observation window structure for preventing sputtering of molten metal liquid according to claim 1, characterized in that: A blanking opening (13) is formed at the bottom of the rectangular magnetic shielding plate (6). The discharge port of the blanking opening (13) is hermetically sealed by a sealing block (11). A guiding arc surface (12) is arranged at the edge of the rectangular magnetic shielding plate (6) close to the blanking opening (13). A guiding semi-circular ring (16) connected with the blanking opening (13) is installed in the inner cavity of the installation hole. The end face of the guiding semi-circular ring (16) close to the shielding plate (41) is set as an inclined surface.

7. A high-temperature furnace opening and closing plate observation window structure for preventing sputtering of molten metal liquid according to claim 6, characterized in that: A triangular guiding block (14) is arranged in the inner cavity of the blanking opening (13). The inclined surface of the guiding block (14) faces upward. The lowest end of the inclined surface of the guiding block (14) is close to the sealing block (11).

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