A gas distribution device for rare earth metal fluoride production

Abstract

The application discloses a gas distribution device for rare earth metal fluoride preparation and relates to the technical field of rare earth metal processing, and aims to solve the technical problem that gas is floated on the surface when the current equipment is used for gas distribution, it is difficult to make the gas enter and exhaust deeply, and the gas distribution is unreasonable, and the gas distribution device comprises a furnace body and a gas distribution assembly installed in the furnace body. The gas inlet equipment and the gas exhaust equipment in the gas distribution assembly are connected with a main gas conveying structure through an electrically-controlled three-way valve, the main gas conveying structure cooperates with a branch gas distribution structure, is rotated and stretched when the gas is inhaled, the gas distribution part can distribute gas at each position in the inner furnace, is contracted when the gas is exhausted, the required gas for reaction can be uniformly conveyed to each position in the furnace, and the gas forms a three-dimensional distribution state in the furnace. Through the design of the gas distribution assembly, the application realizes the breathing type gas conveying, thereby realizing the reasonable distribution and efficient circulation of the gas in the furnace and creating a stable and controllable reaction environment for the production of the rare earth metal fluoride.

Description

Technical Field

[0001] This invention relates to the field of rare earth metal processing technology, and more specifically, to a gas distribution device for the preparation of rare earth metal fluorides. Background Technology

[0002] The industrial preparation of rare earth metal fluorides can be traced back to the early process of reacting rare earth oxides with fluorinating agents at high temperatures using the molten salt method. With advancements in industrial technology, the role of rare earth metal fluorides in industry has become increasingly crucial and diverse. Preparation techniques have evolved from traditional high-temperature molten salt methods and solution precipitation methods to more efficient and precise processes such as hydrothermal / solvothermal methods and vapor deposition. The prepared materials, due to their high optical transparency and excellent chemical stability, have become core components in the optical industry, such as laser crystals and infrared window materials. In the electronics industry, they support the performance improvement of high-end devices in fields such as magneto-optical storage materials and LED phosphor matrices. Simultaneously, they demonstrate the potential to drive the development of green energy technologies in the energy industry, such as solid-state electrolytes and fuel cells. Furthermore, industrially prepared rare earth fluoride nanomaterials provide a functional basis for emerging industrial fields such as catalysis and biomedicine. Currently, the industry is optimizing preparation processes to achieve large-scale production and is continuously advancing towards green and nano-scale technologies to meet the demand for high-performance rare earth fluoride materials from cutting-edge industries such as semiconductors and quantum technology.

[0003] However, existing equipment for rare earth metal fluoride production suffers from inadequate gas distribution system design. Its gas inlet and outlet often rely on fixed-position pipes, resulting in a relatively fixed gas outlet location. This leads to gas concentration near the inlet structure, hindering the formation of a three-dimensional gas distribution effect. Consequently, the gas distribution within the furnace is unreasonable, affecting not only the equilibrium of the reaction environment but also the preparation efficiency and product quality of rare earth metal fluorides. Therefore, we propose a gas distribution device for rare earth metal fluoride preparation. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide a gas distribution device for the preparation of rare earth metal fluorides, so as to solve the technical problem that the gas floats on the surface during gas distribution in the current equipment, making it difficult to deeply introduce and exhaust gas, resulting in unreasonable gas distribution.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a gas distribution device for the preparation of rare earth metal fluorides, comprising a furnace body and a gas distribution component installed inside the furnace body;

[0006] The gas distribution assembly includes an air intake device, an exhaust device, an electrically controlled three-way valve, a main gas transmission structure, a branch gas distribution structure, and a gas distribution section;

[0007] The air intake and exhaust devices are connected to the main gas transmission structure via an electrically controlled three-way valve. The main gas transmission structure is rotatably located inside the furnace body. Several branch gas distribution structures are equidistantly arranged along the long axis of the main gas transmission structure to form a gas distribution system. The branch gas distribution structure is a retractable structure, and the gas distribution part is located at the end of the branch gas distribution structure.

[0008] When the gas distribution assembly is inlet, the branch gas distribution structure extends and the gas is inlet through the gas distribution section;

[0009] When the gas distribution component exhausts gas, the branch gas distribution structure contracts and exhausts gas through the gas distribution section.

[0010] Preferably, the furnace body includes an outer furnace and an inner furnace, the inner furnace being rotatably installed inside the outer furnace, and the end of the inner furnace being provided with an exhaust section communicating with the outside.

[0011] Preferably, the main gas transmission structure includes a gas transmission pipe, a first sealing rod, a counterweight, a second sealing rod, and an exhaust channel;

[0012] A plurality of first sealing rods are equidistantly slidably arranged along the long axis of the gas transmission pipe, and the plurality of first sealing rods are respectively located at opposite positions of a plurality of branch gas distribution structures. The plurality of first sealing rods are interconnected by a crossbeam, and a counterweight is installed below the crossbeam. The second sealing rod is slidably arranged at the end of the gas transmission pipe, and the portion of the second sealing rod located in the gas transmission pipe is slidably connected in the exhaust groove. The second sealing rod, together with the exhaust groove, forms a sealing structure for the gas transmission pipe.

[0013] Preferably, when the branch gas distribution structure rotates to the top of the furnace body, the first sealing rod disengages from the branch gas distribution structure, and the second sealing rod seals the exhaust groove;

[0014] When the branch gas distribution structure rotates to the bottom of the furnace body, the first sealing rod blocks the branch gas distribution structure, and the second sealing rod disengages from the exhaust groove.

[0015] Preferably, the branched air distribution structure includes a first branch pipe, a second branch pipe, a piston rod, a protrusion, a protruding ring, a limiting ring, an air supply pipe, an air outlet pipe, and a one-way valve;

[0016] The first branch pipe is slidably connected to the second branch pipe, and the second branch pipe is connected to an air supply pipe. The piston rod is slidably connected inside the second branch pipe. The front end of the piston rod is mounted on the first branch pipe, and the rear end of the piston rod is mounted on a protrusion. The convex ring is mounted inside the second branch pipe, and the convex ring and the protrusion form a matching elastic locking block structure at the beginning of the piston rod stroke. The limiting ring is mounted inside the second branch pipe, and the limiting ring is located at the end of the piston rod stroke. The air supply pipe and the air outlet pipe are both connected to the second branch pipe. The two one-way valves are respectively mounted on the air supply pipe and the air outlet pipe, and the two one-way valves are set in opposite directions.

[0017] Preferably, when the piston rod is at the beginning, the air inlet end of the air supply pipe is blocked, and the air inlet end and the air supply end of the air outlet pipe are connected to the second branch pipe.

[0018] Preferably, when the piston rod is at its end, the air inlet and air delivery ends of the air supply pipe are connected to the second branch pipe, and the air inlet of the air outlet pipe is blocked.

[0019] Preferably, the gas supply pipe delivers gas into the furnace body through a one-way valve when the gas inlet device is working, and the gas outlet pipe discharges gas from the furnace body through a one-way valve when the gas outlet device is working.

[0020] Preferably, the air distribution section includes air distribution holes, mounting blocks, spring plates, and powder coating rods;

[0021] A plurality of air distribution holes are equidistantly arranged in a ring on the second branch pipe, and a plurality of mounting blocks are correspondingly arranged on the outside of the plurality of air distribution holes. Two spring plates are respectively installed on both sides of the mounting blocks. The spring plates are inwardly bent arc plate structures, and the two spring plates cooperate with the two mounting blocks to form an air cavity structure. A plurality of powder coating rods are installed on the spring plates.

[0022] Preferably, the gas distribution assembly and the inner furnace are respectively connected to two driving parts of the driving assembly, the driving assembly including a rotary drive, a first bevel gear, a second bevel gear, a third bevel gear, a sleeve rod, an inner rod, a sprocket, and a chain;

[0023] The first bevel gear is installed at the output end of the rotary drive. The second and third bevel gears are respectively vertically meshed and connected to the lower sides of the first bevel gear. The sleeve rod is installed on the second bevel gear, and the inner rod is installed on the third bevel gear. The inner rod is rotatably connected to the sleeve rod and extends through the sleeve rod to one side of the second bevel gear. The two sprockets are respectively installed on the inner rod and the sleeve rod. The sprockets are connected to another sprocket through a chain. The other two sprockets are respectively connected to the inner furnace and the gas supply pipe.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This invention utilizes a gas distribution component. The gas inlet and outlet devices within the component are connected to the main gas delivery structure via an electrically controlled three-way valve, allowing for flexible switching between inlet and outlet modes. The main gas delivery structure, in conjunction with a branch gas distribution structure, features rotatable and extendable characteristics. During inlet gas flow, the branch structure rotates and extends, ensuring gas distribution at various locations within the furnace, guaranteeing sufficient contact between the reactant gas and the rare earth raw materials. During outlet gas flow, it contracts, facilitating the discharge of waste gas generated during the reaction. This allows for the even distribution of the required gas throughout the furnace, creating a three-dimensional gas distribution that fully covers the raw materials and improves reaction efficiency. Through the design of the gas distribution component, this invention achieves a breathing-like gas delivery system, enabling rational distribution and efficient circulation of gas within the furnace, creating a stable and controllable reaction environment for the production of rare earth metal fluorides.

[0026] 2. This invention utilizes the coordinated movement of the main gas delivery structure and the branch gas distribution structure. When the branch gas distribution structure rotates to the top of the furnace body, the gas delivery pipe forms a closed loop, forcing gas to be delivered into the furnace body through the branch gas distribution structure, ensuring precise injection of the reaction gas into the powder raw material area. When the branch gas distribution structure rotates to the bottom of the furnace body, the end channel of the gas delivery pipe opens, allowing the gas to be discharged into the inner furnace through the exhaust trough. This automatic switching mechanism based on rotational position achieves seamless connection between gas intake and exhaust without the need for a complex electrical control system. Furthermore, this invention uses the main gas delivery structure to spray gas from above, allowing the gas to naturally sink under gravity and directly cover the surface of the powder raw materials. This ensures sufficient contact between the reaction gas and the raw materials, preventing the gas from failing to effectively penetrate the raw material pile due to an excessively low spray position, thereby improving the uniformity and completeness of the reaction.

[0027] 3. This invention utilizes a gas distribution section design where gas distribution holes are evenly distributed in a ring on the second branch pipe. The combination of the mounting block and the spring plate constructs a gas cavity structure. When gas passes through the inwardly bent arc-shaped spring plate, the gas pushes the spring plate open, causing it to vibrate due to its elasticity. A powder-coating rod is mounted on the spring plate. When the branch gas distribution structure rotates to the bottom of the furnace, the powder-coating rod carries the powdered raw material, and as it moves upward, the vibration of the spring plate shakes the powder down, achieving precise material delivery and dispersion, avoiding uneven reaction caused by material accumulation. This invention, through its gas distribution section design, allows raw materials accumulated at the bottom to be lifted and dispersed above the furnace, thereby optimizing the reaction effect of the raw materials.

[0028] 4. This invention designs a drive assembly that uses rotational drive as its power source. Through the perpendicular meshing of the first bevel gear with the second and third bevel gears, the single power source is distributed into rotational outputs in two directions. The nested structure of the sleeve rod and the inner rod ensures that both can rotate independently while the inner rod is rotatably connected to the sleeve rod, achieving parallel power transmission. The sprocket and chain provide synchronous but independently opposite rotational driving forces to the inner furnace and the inner gas distribution pipe. This design causes the rare earth raw materials inside the furnace to continuously tumble during rotation, cooperating with the constantly moving gas distribution structure to avoid localized overheating or uneven reaction. This invention, through its drive assembly, enables the rare earth raw materials inside the furnace to continuously tumble and cooperate with the gas distribution structure, preventing localized overheating or uneven reaction of the rare earth raw materials. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the present invention with part of the shell removed;

[0031] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of some gas distribution components and driving components of the present invention;

[0033] Figure 5 This is a schematic diagram of another part of the gas distribution component of the present invention;

[0034] Figure 6 This is a cross-sectional view of the branched air distribution structure of the present invention;

[0035] Figure 7 This is a schematic diagram of the air distribution section of the present invention;

[0036] Figure 8 This is a schematic diagram showing the deformation of the branched gas distribution structure of the present invention when it moves to the top of the furnace body.

[0037] Figure 9 This is a schematic diagram showing the deformation of the branched gas distribution structure of the present invention when it moves to the bottom of the furnace body;

[0038] Figure 10 This is a schematic diagram showing the deformation of the branched air distribution structure of the present invention during air intake;

[0039] Figure 11 This is a schematic diagram showing the deformation of the branched air distribution structure of the present invention during air outlet.

[0040] Explanation of the labels in the diagram:

[0041] 1. Furnace body; 2. Gas distribution assembly; 3. Drive assembly;

[0042] 101. Outer furnace; 102. Inner furnace;

[0043] 201. Air intake equipment; 202. Exhaust equipment; 203. Electrically controlled tee; 204. Main air transmission structure; 205. Branch air distribution structure; 206. Air distribution section;

[0044] 2041. Gas supply pipe; 2042. First sealing rod; 2043. Counterweight; 2044. Second sealing rod; 2045. Exhaust chute;

[0045] 2051, First branch pipe; 2052, Second branch pipe; 2053, Piston rod; 2054, Protrusion; 2055, Protruding ring; 2056, Limiting ring; 2057, Air supply pipe; 2058, Air outlet pipe; 2059, One-way valve;

[0046] 2061. Air distribution hole; 2062. Mounting block; 2063. Spring plate; 2064. Powder coating rod;

[0047] 301. Rotary drive; 302. First bevel gear; 303. Second bevel gear; 304. Third bevel gear; 305. Sleeve rod; 306. Inner rod; 307. Sprocket; 308. Chain. Detailed Implementation

[0048] Example 1, such as Figures 1 to 3 As shown, the present invention relates to a gas distribution device for the preparation of rare earth metal fluorides, comprising a furnace body 1 and a gas distribution assembly 2 installed inside the furnace body 1.

[0049] The gas distribution assembly 2 includes an air intake device 201, an exhaust device 202, an electrically controlled three-way valve 203, a main gas transmission structure 204, a branch gas distribution structure 205, and a gas distribution section 206.

[0050] The air intake device 201 and the exhaust device 202 are connected to the main air transmission structure 204 through the electrically controlled three-way valve 203. The main air transmission structure 204 is rotatably installed inside the furnace body 1. Fifteen branch air distribution structures 205 are arranged equidistantly along the long axis of the main air transmission structure 204 to form an air distribution system. The branch air distribution structures 205 are telescopic structures, and the air distribution part 206 is located at the end of the branch air distribution structure 205.

[0051] When air is being introduced, the branch air distribution structure 205 extends and air is introduced through the air distribution section 206;

[0052] When the gas distribution component 2 is venting, the branch gas distribution structure 205 contracts and the gas is vented through the gas distribution section 206;

[0053] When the branch gas distribution structure 205 rotates to the top of the furnace body 1, the gas distribution section 206 begins to intake or draw in air;

[0054] When the branch gas distribution structure 205 rotates to the bottom of the furnace body 1, the gas distribution section 206 wraps around the powder raw material.

[0055] This invention utilizes a gas distribution component 2. The gas inlet device 201 and gas outlet device 202 within the gas distribution component 2 are connected to the main gas delivery structure 204 via an electrically controlled three-way valve 203, allowing for flexible switching between inlet and outlet modes. The main gas delivery structure 204, in conjunction with a branch gas distribution structure 205, can evenly deliver the required gas to various parts of the furnace, creating a three-dimensional gas distribution within the furnace to fully cover the raw materials and improve reaction efficiency. The rotatable and expandable characteristics of the branch gas distribution structure 205 allow it to rotate and expand during inlet gas delivery, enabling the gas distribution section 206 to distribute gas at various locations within the inner furnace 102, ensuring full contact between the reaction gas and the rare earth raw materials; during outlet gas delivery, it contracts to facilitate the discharge of waste gas generated during the reaction. Through the design of the gas distribution component 2, this invention achieves a breathing-like gas delivery system, thereby enabling the rational distribution and efficient circulation of gas within the furnace, creating a stable and controllable reaction environment for the production of rare earth metal fluorides.

[0056] Specifically, such as Figures 5 to 9 As shown, the main gas transmission structure 204 of the present invention includes a gas transmission pipe 2041, a first sealing rod 2042, a counterweight 2043, a second sealing rod 2044, and an exhaust groove 2045;

[0057] Fifteen first sealing rods 2042 are equidistantly slidably arranged along the long axis of the gas transmission pipe 2041, and the fifteen first sealing rods 2042 are respectively located at opposite positions of the fifteen branch gas distribution structures 205. The fifteen first sealing rods 2042 are interconnected by a crossbeam, and a counterweight 2043 is installed below the crossbeam. The second sealing rod 2044 is slidably arranged at the end of the gas transmission pipe 2041, and the part of the second sealing rod 2044 located in the gas transmission pipe 2041 is slidably connected in the exhaust groove 2045. The second sealing rod 2044 and the exhaust groove 2045 form a sealing structure for the gas transmission pipe 2041.

[0058] When the branch gas distribution structure 205 rotates to the top of the furnace body 1, the first sealing rod 2042 disengages from the branch gas distribution structure 205, and the second sealing rod 2044 seals the exhaust groove 2045.

[0059] When the branch gas distribution structure 205 rotates to the bottom of the furnace body 1, the first sealing rod 2042 seals the branch gas distribution structure 205, and the second sealing rod 2044 disengages from the exhaust groove 2045.

[0060] This invention utilizes the coordinated movement of the main gas supply structure 204 and the branch gas distribution structure 205. When the branch gas distribution structure 205 rotates to the top of the furnace body 1, the counterweight 2043 causes the crossbeam and the first sealing rod 2042 to slide downwards due to gravity, causing the first sealing rod 2042 to disengage from the connection port of the branch gas distribution structure 205. At the same time, the second sealing rod 2044 slides to the sealing position in the exhaust groove 2045. At this time, the gas supply pipe 2041 forms a closed loop, and the gas is forced to be transported into the furnace body 1 through the branch gas distribution structure 205, ensuring that the reaction gas is accurately injected into the powder raw material area.

[0061] When the branch gas distribution structure 205 rotates to the bottom of the furnace body 1, the direction of gravity of the counterweight 2043 changes, causing the first sealing rod 2042 to slide upward, sealing the gas inlet port of the branch gas distribution structure 205. At the same time, the second sealing rod 2044 disengages from the exhaust groove 2045, opening the end channel of the gas supply pipe 2041, allowing the gas to be discharged into the inner furnace 102 through the exhaust groove 2045. This automatic switching mechanism based on rotational position can achieve seamless connection between gas intake and exhaust without a complex electrical control system. In this invention, the gas is injected from above through the main gas supply structure 204. The gas can naturally sink under gravity and directly cover the surface of the powder raw materials, ensuring full contact between the reaction gas and the raw materials. This avoids the gas not being able to effectively penetrate into the raw material pile due to the injection position being too low, thereby improving the uniformity and completeness of the reaction.

[0062] It is worth noting that, such as Figures 6 to 11 As shown, the branched air distribution structure 205 of the present invention includes a first branch pipe 2051, a second branch pipe 2052, a piston rod 2053, a protrusion 2054, a protruding ring 2055, a limiting ring 2056, an air supply pipe 2057, an air outlet pipe 2058, and a one-way valve 2059; the first branch pipe 2051 is slidably connected to the second branch pipe 2052, and the second branch pipe 2052 is connected to an air supply pipe 2041; the piston rod 2053 is slidably connected inside the second branch pipe 2052, and the front end of the piston rod 2053 is installed on the first branch pipe 2051. The rear end is mounted on the protrusion 2054, the protruding ring 2055 is mounted inside the second branch pipe 2052, and the protruding ring 2055 and the protrusion 2054 form a matching elastic locking block structure at the beginning of the piston rod 2053 stroke. The limiting ring 2056 is mounted inside the second branch pipe 2052, and the limiting ring 2056 is located at the end of the piston rod 2053 stroke. The air supply pipe 2057 and the air outlet pipe 2058 are both connected to the second branch pipe 2052. Two one-way valves 2059 are respectively mounted on the air supply pipe 2057 and the air outlet pipe 2058, and the two one-way valves 2059 are set in opposite directions.

[0063] When the piston rod 2053 is at the beginning, the air inlet end of the air supply pipe 2057 is blocked, and the air inlet and air supply ends of the air outlet pipe 2058 are connected to the second branch pipe 2052.

[0064] When the piston rod 2053 is at the end, the air inlet and air outlet of the air supply pipe 2057 are connected to the second branch pipe 2052, and the air inlet of the air outlet pipe 2058 is blocked.

[0065] When the gas inlet device 201 is working, the gas supply pipe 2057 delivers gas into the furnace body 1 through the one-way valve 2059, and the gas outlet pipe 2058 discharges gas from the furnace body 1 through the one-way valve 2059 when the exhaust device 202 is working.

[0066] This invention utilizes a branched gas distribution structure 205. The sliding connection between the first branch pipe 2051 and the second branch pipe 2052, combined with the forward and backward movement of the piston rod 2053, forms a retractable dynamic gas distribution unit. When the piston rod 2053 is at the beginning of its stroke, the elastic locking structure formed by the protrusion 2054 and the convex ring 2055 restricts its movement, thus blocking the air inlet of the air supply pipe 2057. As the air intake device 201 is activated, gas enters the air delivery pipe 2041 and pushes the piston rod 2053 forward. When the piston rod 2053 reaches the end of its stroke, the limiting ring 2056 blocks it. At this time, the gas supply pipe 2057 is connected to the second branch pipe 2052. The one-way valve 2059 on the gas supply pipe 2057 ensures that the gas can only flow into the furnace body 1 in one direction, so that the reaction gas is evenly transported to all parts of the furnace through the first branch pipe 2051. When venting, the gas is drawn out to generate negative pressure. Because the gas outlet pipe 2058 is blocked by the piston rod 2053 at the end of its stroke, the piston rod 2053 moves backward. The protrusion 2054 and the protruding ring 2055 restrict its movement again. At this time, the gas outlet pipe 2058 is connected. The one-way valve 2059 on the gas outlet pipe 2058 ensures that the gas can only be discharged, thus completing the gas exchange. This structural design uses air pressure to drive the piston rod 2053 to change the pipeline connection state. The extension and shortening of the first branch pipe 2051 can be achieved when switching between air intake and exhaust without additional control components.

[0067] Furthermore, such as Figures 6 to 7 As shown, the air distribution section 206 of the present invention includes air distribution holes 2061, mounting blocks 2062, spring plates 2063, and powder coating rods 2064; eighteen air distribution holes 2061 are equidistantly arranged in a ring on the second branch pipe 2052, eighteen mounting blocks 2062 are correspondingly arranged on the outside of the eighteen air distribution holes 2061, two spring plates 2063 are respectively installed on both sides of the mounting blocks 2062, the spring plates 2063 are inwardly bent arc plate structures, and the two spring plates 2063 cooperate with the two mounting blocks 2062 to form an air cavity structure, and a number of powder coating rods 2064 are installed on the spring plates 2063.

[0068] This invention utilizes the design of the gas distribution section 206. Gas distribution holes 2061 are evenly distributed in a ring on the second branch pipe 2052. The combination of the mounting block 2062 and the elastic plate 2063 constructs a gas cavity structure. When gas passes through the inwardly bent arc-shaped elastic plate 2063, the gas can push the elastic plate 2063 open, causing it to vibrate due to its elasticity. A powder-coating rod 2064 is installed on the elastic plate 2063. When the branch gas distribution structure 205 rotates to below the furnace body 1, the powder-coating rod 2064 coats the powdered raw material. As it moves upward, the vibration of the elastic plate 2063 shakes the powder down, achieving precise delivery and dispersion of the raw material and avoiding uneven reaction caused by material accumulation. Through the design of the gas distribution section 206, this invention enables the gas distribution section 206 to lift the raw material accumulated at the bottom and disperse it above the furnace body 1, thereby optimizing the reaction effect of the raw material.

[0069] Furthermore, such as Figures 1 to 4 As shown, the gas distribution assembly 2 and the inner furnace 102 of the present invention are respectively connected to two driving parts of the driving assembly 3. The driving assembly 3 includes a rotary drive 301, a first bevel gear 302, a second bevel gear 303, a third bevel gear 304, a sleeve rod 305, an inner rod 306, a sprocket 307, and a chain 308. The first bevel gear 302 is installed at the output end of the rotary drive 301, and the second bevel gear 303 and the third bevel gear 304 are respectively vertically meshed with the first bevel gear 302. On the lower sides, the sleeve rod 305 is mounted on the second bevel gear 303, and the inner rod 306 is mounted on the third bevel gear 304. The inner rod 306 is rotatably connected to the sleeve rod 305, and extends through the sleeve rod 305 to one side of the second bevel gear 303. Two sprockets 307 are respectively mounted on the inner rod 306 and the sleeve rod 305. The sprocket 307 is connected to another sprocket 307 through a chain 308. The other two sprockets 307 are respectively connected to the inner furnace 102 and the gas supply pipe 2041.

[0070] This invention designs a drive assembly 3, which uses a rotary drive 301 as its power source. Through the perpendicular meshing of the first bevel gear 302 with the second and third bevel gears 304, the single power source is distributed into two rotational outputs. The nested structure of the sleeve rod 305 and the inner rod 306 ensures that both can rotate independently while the inner rod 306 is rotatably connected to the sleeve rod 305, achieving parallel power transmission. The sprocket 307 and chain 308 provide the inner furnace 102 and the inner gas pipe 2042 with synchronous but independently opposite rotational drive forces 301. This design allows the rare earth raw materials inside the furnace to continuously tumble during rotation of the inner furnace 102 and the branch gas distribution structure 205. Combined with the continuously moving gas distribution structure, this prevents localized overheating or uneven reaction. In short, this invention, through the drive assembly 3, enables the rare earth raw materials inside the furnace to continuously tumble and cooperate with the gas distribution structure, preventing localized overheating or uneven reaction.

[0071] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A gas distribution device for the preparation of rare earth metal fluorides, comprising a furnace body, characterized in that, Gas distribution components installed inside the furnace body; The gas distribution assembly includes an air intake device, an exhaust device, an electrically controlled three-way valve, a main gas transmission structure, a branch gas distribution structure, and a gas distribution section; The air intake and exhaust devices are connected to the main gas transmission structure via an electrically controlled three-way valve. The main gas transmission structure is rotatably located inside the furnace body. Several branch gas distribution structures are equidistantly arranged along the long axis of the main gas transmission structure to form a gas distribution system. The branch gas distribution structure is a retractable structure, and the gas distribution part is located at the end of the branch gas distribution structure. When the gas distribution assembly is inlet, the branch gas distribution structure extends and the gas is inlet through the gas distribution section; When the gas distribution component exhausts gas, the branch gas distribution structure contracts and exhausts gas through the gas distribution section. The main gas transmission structure includes a gas transmission pipe, a first sealing rod, a counterweight, a second sealing rod, and an exhaust channel; A plurality of first sealing rods are equidistantly slidably arranged along the long axis of the gas transmission pipe, and the plurality of first sealing rods are respectively located at opposite positions of a plurality of branch gas distribution structures. The plurality of first sealing rods are interconnected by a crossbeam, and a counterweight is installed below the crossbeam. The second sealing rod is slidably arranged at the end of the gas transmission pipe, and the portion of the second sealing rod located in the gas transmission pipe is slidably connected in the exhaust groove. The second sealing rod, together with the exhaust groove, forms a sealing structure for the gas transmission pipe. The branched air distribution structure includes a first branch pipe, a second branch pipe, a piston rod, a protrusion, a protruding ring, a limiting ring, an air supply pipe, an air outlet pipe, and a one-way valve. The first branch pipe is slidably connected to the second branch pipe, and the second branch pipe is connected to the gas supply pipe. The piston rod is slidably connected inside the second branch pipe. The front end of the piston rod is installed on the first branch pipe, and the rear end of the piston rod is installed on the protrusion. The convex ring is installed inside the second branch pipe, and the convex ring and the protrusion form a matching elastic locking block structure at the beginning of the piston rod stroke. The limiting ring is installed inside the second branch pipe, and the limiting ring is located at the end of the piston rod stroke. The gas supply pipe and the gas outlet pipe are both connected to the second branch pipe. The two one-way valves are respectively installed on the gas supply pipe and the gas outlet pipe, and the two one-way valves are set in opposite directions. The air distribution section includes air distribution holes, mounting blocks, spring plates, and powder coating rods; A plurality of air distribution holes are equidistantly arranged in a ring on the second branch pipe, and a plurality of mounting blocks are correspondingly arranged on the outside of the plurality of air distribution holes. Two spring plates are respectively installed on both sides of the mounting blocks. The spring plates are inwardly bent arc plate structures, and the two spring plates cooperate with the two mounting blocks to form an air cavity structure. A plurality of powder coating rods are installed on the spring plates.

2. The gas distribution device for the preparation of rare earth metal fluorides according to claim 1, characterized in that, The furnace body includes an outer furnace and an inner furnace. The inner furnace is rotatably installed inside the outer furnace, and the end of the inner furnace is provided with an exhaust section that communicates with the outside.

3. The gas distribution device for the preparation of rare earth metal fluorides according to claim 1, characterized in that, When the branch gas distribution structure rotates to the top of the furnace body, the first sealing rod disengages from the branch gas distribution structure, and the second sealing rod seals the exhaust groove. When the branch gas distribution structure rotates to the bottom of the furnace body, the first sealing rod blocks the branch gas distribution structure, and the second sealing rod disengages from the exhaust groove.

4. The gas distribution device for the preparation of rare earth metal fluorides according to claim 1, characterized in that, When the piston rod is at the beginning, the air inlet end of the air supply pipe is blocked, and the air inlet end and air supply end of the air outlet pipe are connected to the second branch pipe.

5. A gas distribution device for the preparation of rare earth metal fluorides according to claim 1, characterized in that, When the piston rod is at its end, the air inlet and air delivery ends of the air supply pipe are connected to the second branch pipe, and the air inlet of the air outlet pipe is blocked.

6. A gas distribution device for the preparation of rare earth metal fluorides according to claim 1, characterized in that, The gas supply pipe delivers gas into the furnace body through a one-way valve when the gas inlet device is working, and the gas outlet pipe discharges gas from the furnace body through a one-way valve when the gas outlet device is working.

7. A gas distribution device for the preparation of rare earth metal fluorides according to claim 1, characterized in that, The gas distribution assembly and the inner furnace are respectively connected to two drive units of the drive assembly. The drive assembly includes a rotary drive, a first bevel gear, a second bevel gear, a third bevel gear, a sleeve rod, an inner rod, a sprocket, and a chain. The first bevel gear is installed at the output end of the rotary drive. The second and third bevel gears are respectively vertically meshed and connected to the lower sides of the first bevel gear. The sleeve rod is installed on the second bevel gear, and the inner rod is installed on the third bevel gear. The inner rod is rotatably connected to the sleeve rod and extends through the sleeve rod to one side of the second bevel gear. The two sprockets are respectively installed on the inner rod and the sleeve rod. The sprockets are connected to another sprocket through a chain. The other two sprockets are respectively connected to the inner furnace and the gas supply pipe.

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