Anti-oxidation device suitable for molybdenum-based alloy reaction kettle

Abstract

The invention relates to the technical field of reaction kettle anti-oxidation devices, in particular to an anti-oxidation device suitable for a molybdenum-based alloy reaction kettle, which comprises a reaction kettle, a sealing cover is fixedly mounted at the upper end of the reaction kettle, an integration pipe is arranged at the upper end of the sealing cover in a penetrating manner and used for connecting an external gas source, and an isolation sleeve is fixedly connected to one end, close to the reaction kettle, of the integration pipe. The isolation sleeve is located below the sealing cover, a plurality of outer protection pipes are arranged below the isolation sleeve, a multi-stage nozzle device is arranged in each outer protection pipe, movable pipes are arranged in the outer protection pipes in a penetrating mode, inert gas in the movable pipes is released through gas guide holes, and flow is guided cooperatively through the gas guide holes formed among the multiple outer protection pipes; the inert gas is more efficiently and uniformly filled into the reaction kettle, so that the gas filling efficiency and the gas distribution uniformity are improved, the stable control of the reaction environment is facilitated, and the interference of local oxygen residue on the reaction is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of anti-oxidation devices for reactors, and in particular to an anti-oxidation device suitable for molybdenum-based alloy reactors. Background Art

[0002] Molybdenum-based alloys (such as Mo-Zr-Ti, TZM, etc.) are widely used in high-temperature reactors in the chemical, metallurgical and nuclear industries due to their excellent high-temperature strength (>1000℃), corrosion resistance and thermal conductivity. However, when the operating temperature exceeds 400℃, the molybdenum alloy will undergo a violent oxidation reaction with oxygen to generate volatile MoO 3 (sublimation point 795℃), resulting in rapid material failure. Statistics show that after an unprotected molybdenum alloy reactor has been working continuously for 200 hours in an oxidizing atmosphere, the wall thickness loss can reach 3-5mm, seriously affecting the life of the equipment.

[0003] After searching, it was found that the prior art publication number is CN 217910387 U, which discloses an anti-oxidation synthesis reactor, including a reactor body, a first water pump and an inert gas tank, the reactor body including a reactor body, a frame and an electric stirring mechanism, the bottom of the reactor body is provided with a first discharge port and a second discharge port, the top of the reactor body is provided with a plurality of feed ports, the plurality of feed ports include a first feed port and a second feed port, the first feed port is used to input water; the frame is installed on the top of the reactor body; the electric stirring mechanism is installed on the frame and its stirrer extends into the interior of the reactor body; the inlet end of the first water pump is connected with the second discharge port; the inert gas tank is installed on the frame and the vent is set at the bottom, the vent is connected with the second feed port and a switch valve is provided between the two, in the process of replacing the air in the reactor with inert gas, the extremely low air pressure is not formed in the reactor body, thereby effectively reducing the risk of damage to the reactor.

[0004] Therefore, based on the above search and in combination with the existing technology, the existing reactor usually injects inert gas into the interior by setting up a gas duct or a valve structure to isolate the oxygen in the air and maintain the stability of the reaction environment. However, since most devices adopt a single channel or single point injection method, the inert gas is unevenly distributed in the reactor, which can easily lead to residual oxygen in local areas, making it difficult to form an ideal inert atmosphere environment, thereby affecting the stability of the reaction process and the purity of the product. During long-term use, local residual oxygen may also cause selective oxidation of the inner wall of the reactor, and gradually diffuse and spread from the oxidation site, ultimately affecting the overall service life and structural safety of the reactor. For this reason, the present application proposes an anti-oxidation device suitable for a molybdenum-based alloy reactor. Summary of the invention

[0005] The object of the present invention is to provide an anti-oxidation device suitable for a molybdenum-based alloy reactor to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-oxidation device suitable for a molybdenum-based alloy reactor, comprising a reactor, a sealing cover is fixedly installed on the upper end of the reactor, an integrated pipe is penetrated at the upper end of the sealing cover for connecting an external gas source, an isolation sleeve is fixedly connected to one end of the integrated pipe close to the reactor, and the isolation sleeve is located below the sealing cover, a plurality of outer protective tubes are arranged below the isolation sleeve, a multi-stage nozzle device is arranged inside the outer protective tube for spraying out inert gas, realizing layered supply of reaction gas, and protecting the inner wall of the reactor from oxidation, a temperature-controllable heating device is arranged at the bottom end of the reactor for heating the chamber inside the reactor, a bottom tube is arranged below the outer protective tube, and a traction rod is fixedly installed on the outer surface of the bottom tube, a passive rod is penetrated at the inner end of the isolation sleeve, and an end of the traction rod away from the bottom tube is fixedly connected to the outer surface of the passive rod.

[0007] As a further solution of the present invention, the outer protective tube is connected to the bottom tube by a connecting ring, and the upper and lower ends of the connecting ring are respectively sleeved on the adjacent ends of the outer protective tube and the bottom tube, the inner end of the integrated tube is penetrated by an output tube, the outer surface of the output tube is sleeved by a connecting sleeve, the connecting sleeve is fixedly connected to the inner wall of the integrated tube, and one end of the connecting sleeve close to the isolation sleeve is fixedly connected to two reset tubes.

[0008] As a further solution of the present invention, the reset tube and the passive rod are staggered with each other, the connecting sleeve and the reset tube are both provided with air guide grooves, the outer surface of the output tube is provided with an output hole, the output hole is located inside the connecting sleeve, the output hole on the outer surface of the output tube is staggered with the upper end of the air guide groove, and after the output tube is rotated, the output hole and the air guide groove are connected with each other, an inner tube is arranged between the passive rod and the reset tube, and the output tube is penetrated through the outer surface of the inner tube.

[0009] As a further solution of the present invention, the multi-stage nozzle device includes a center tube, which is passed through the interior of the outer protective tube, and one end of the center tube away from the outer protective tube is fixedly connected to the isolation sleeve, a movable tube is passed through the inner end of the center tube, and a stabilizing sleeve and a heating sleeve are sequentially sleeved on the outer surface of the center tube.

[0010] As a further solution of the present invention, the heating sleeve is fixedly connected to the bottom pipe, the stabilizing sleeve is fixedly connected to the outer protective tube, two air guide holes are provided inside the stabilizing sleeve, and the air guide holes are located below the outer protective tube, and a limiting flow ring is fixedly installed on the outer surface of the center tube. This structure can achieve effective introduction and distribution of inert gas and improve gas filling efficiency by fixedly connecting the heating sleeve to the bottom pipe, the stabilizing sleeve to the outer protective tube, and providing air guide holes in the stabilizing sleeve.

[0011] As a further solution of the present invention, two connecting tubes are fixedly installed on the inner end of the stabilizing sleeve, and the connecting tubes are connected to the air guide holes. An unlocking ring is fixedly connected to the upper end of the heated sleeve, and a plurality of triangular blocks are fixedly installed on the upper end of the unlocking ring. This structure achieves smooth guidance and circulation of gas by installing connecting tubes on the inner end of the stabilizing sleeve and connecting them to the air guide holes.

[0012] As a further solution of the present invention, the triangular block corresponds to the connecting tube, the inner end of the connecting tube is provided with an air outlet plug, the outer surface of the air outlet plug is fixedly connected with a clamping plate, the outer surface of the clamping plate contacts the inclined surface of the outer surface of the triangular block, and the structure realizes accurate release and control of gas by the triangular block corresponding to the connecting tube and cooperating with the design of the air outlet plug. The design of the clamping plate contacting the inclined surface of the triangular block enables the air outlet plug to be flexibly adjusted when needed.

[0013] As a further solution of the present invention, a passive ring is sleeved on the outer surface of the central tube, and the passive ring is located below the bottom tube, and the passive ring is fixedly installed at the bottom end of the movable tube. When the bottom tube moves downward, the passive ring is pushed to cause the movable tube to move downward accordingly. This structure sleeves a passive ring on the outer surface of the central tube and fixes it at the bottom end of the movable tube. When the bottom tube moves downward, it can effectively push the passive ring and drive the movable tube to move downward together, thereby realizing precise movement and control of the movable tube.

[0014] As a further solution of the present invention, a heat receiving tube for preheating the inert gas is wound around the outer surface of the reactor, an air outlet pipe is passed through the upper end of the sealing cover, an input end of the air outlet pipe is passed through the interior of the reactor, and a spiral tube is provided inside the air outlet pipe, and the spiral tube and the heat receiving tube are fixedly connected by a conducting tube.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is used, the inert gas in the movable tube is released through the gas guide holes, and the gas guide holes arranged between the multiple outer protective tubes are used for coordinated flow guidance, so that the inert gas is more efficiently and evenly filled into the reactor, thereby improving the charging efficiency and the uniformity of the gas distribution, which is helpful for the stable control of the reaction environment and avoiding the interference of local oxygen residue on the reaction; 2. After the production is finished, the device realizes the control operation by rotating the diverter cover, driving the output pipe to rotate, so that the output hole is connected with the gas guide groove, thereby guiding the inert gas into the gas guide groove, and as the pressure in the gas guide groove rises, the push rod drives the passive rod to move upward, and the bottom pipe is further driven upward by the traction rod, so that the outer protective pipe contacts the bottom pipe again and closes the gas guide hole, thereby preventing gas leakage; 3. The present invention moves the heated sleeve upward synchronously, and the liquid aluminum alloy inside it re-coats the flow-limiting ring and solidifies during the cooling process to form a stable positioning structure. This process not only realizes the automatic resetting and sealing of the gas path system of the device, but also provides a structural limiting function through the solidification of the aluminum alloy, effectively preventing the outer protective tube and the bottom tube from being misaligned or sliding down under the action of gravity, thereby improving the overall safety, sealing and reusability of the device; 4. Preheat the inert gas through the exhaust gas to prevent the low-temperature inert gas from entering the reactor, causing local sudden cooling inside and causing stress cracks, thereby affecting the normal working temperature inside the reactor and disrupting the reaction balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an anti-oxidation device suitable for a molybdenum-based alloy reactor; Figure 2 It is a schematic diagram of the structure inside the reactor; Figure 3 It is a structural schematic diagram of the bottom end of the sealing cover; Figure 4 It is a schematic diagram of the structure inside the integrated tube; Figure 5 It is a structural schematic diagram of the output pipe and the inner pipe; Figure 6 It is a schematic diagram of the structure inside the output tube and the inner tube; Figure 7 It is a structural schematic diagram of a multi-stage nozzle device; Figure 8 It is a schematic diagram of the structure inside the outer protective pipe and the bottom pipe; Fig. 9 It is a schematic diagram of the structure inside the stabilizing sleeve and the heating sleeve; Fig.10 It is a schematic diagram of the structure inside the connecting pipe; Fig.11 Schematic diagram of the structure inside the central tube; Fig.12 It is a structural schematic diagram of the position relationship between the inner tube and the baffle block; Fig.13 Schematic diagram of the internal structure of the exhaust pipe.

[0017] In the figure: 1, reactor; 2, heating tube; 3, sealing cover; 4, driving motor; 5, integration tube; 6, insulation tube; 7, air outlet pipe; 8, conduction tube; 11, spiral tube; 12, splitter cover; 13, stirring rod; 101, isolation sleeve; 102, outer protective tube; 103, bottom tube; 104, traction rod; 105, connecting ring; 201, output tube; 202, connecting sleeve; 203, reset tube; 204, passive rod; 205, push rod; 206, inner tube; 207, flow block; 208, auxiliary spring; 209, reversing rod; 210, plug plate; 211, air guide groove; 212, output hole; 301, center tube; 302, movable tube; 303, stabilizing sleeve; 304, heating sleeve; 305, passive ring; 401, connecting pipe; 402, air guide hole; 403, flow limiting ring; 404, unlocking ring; 405, triangular block; 406, clamping plate; 407, air outlet plug. DETAILED DESCRIPTION

[0018] 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.

[0019] Example 1: Please refer to Figure 1 - Figure 4 , an anti-oxidation device suitable for a molybdenum-based alloy reactor, comprising a reactor 1, a sealing cover 3 is fixedly installed on the upper end of the reactor 1 by bolts, a driving motor 4 is fixedly installed on the upper end of the sealing cover 3 by bolts, a stirring rod 13 is fixedly installed on the output end of the driving motor 4, and the stirring rod 13 is penetrated inside the reactor 1, and the output end of the driving motor 4 drives the stirring rod 13 to rotate to accelerate the mixing efficiency of the substances inside the reactor 1, an integration pipe 5 is penetrated on the upper end of the sealing cover 3 for connecting an external gas source, an isolation sleeve 101 is fixedly connected to one end of the integration pipe 5 close to the reactor 1, and the isolation sleeve 101 is located below the sealing cover 3, a plurality of outer protective tubes 102 are arranged below the isolation sleeve 101, and the inner part of the outer protective tube 102 is arranged There is a multi-stage nozzle device for spraying inert gas to protect the inner wall of the reactor 1 from oxidation (such as argon + ammonia mixture, krypton, argon). The bottom of the reactor 1 is provided with a temperature-controllable heating device for heating the chamber inside the reactor 1. The heating device is an existing mature technology and will not be described in detail here. During the operation of the reactor 1, since the mass of the inert gas is greater than that of oxygen, when the inert gas is continuously filled into the interior, the inert gas is naturally deposited at the bottom of the reactor 1. As the amount of inert gas continues to increase, oxygen is gradually discharged from the top of the sealing cover 3, thereby effectively preventing the inner wall of the reactor 1 from oxidation under high temperature conditions. An oxygen concentration sensor is provided at the bottom of the sealing cover 3 for real-time monitoring of the oxygen content inside the reactor 1.

[0020] A bottom pipe 103 is provided below the outer protective pipe 102, and a traction rod 104 is fixedly installed on the outer surface of the bottom pipe 103. A passive rod 204 is passed through the inner end of the isolation sleeve 101, and one end of the traction rod 104 away from the bottom pipe 103 is fixedly welded to the outer surface of the passive rod 204. The outer protective tube 102 is connected to the bottom tube 103 through a connecting ring 105, and the upper and lower ends of the connecting ring 105 are respectively sleeved on the adjacent ends of the outer protective tube 102 and the bottom tube 103. The outer surfaces of the outer protective tube 102 and the bottom tube 103 are fixedly installed with limit blocks, which are located inside the connecting ring 105. The ends of two adjacent outer protective tubes 102 are connected through the connecting ring 105, and their relative movement distance is limited by the limit blocks. Specifically, the outer protective tube 102, the connecting ring 105 and the bottom tube 103 are all made of high-temperature resistant metal materials (such as tungsten, nickel-based high-temperature alloy, molybdenum alloy, etc.).

[0021] like Figure 3 - Figure 5 As shown, an output tube 201 is penetrated at the inner end of the integration tube 5, and a connecting sleeve 202 is sleeved on the outer surface of the output tube 201, and the connecting sleeve 202 is fixedly connected to the inner wall of the integration tube 5, and one end of the connecting sleeve 202 close to the isolation sleeve 101 is fixedly connected to two reset tubes 203, and the reset tubes 203 and the passive rods 204 are staggered with each other, and the passive rods 204 and the isolation sleeve 101 are connected through an auxiliary spring 208, and the connecting sleeve 202 and the reset tube 203 are both provided with air guide grooves 211 inside, and an output hole 212 is provided on the outer surface of the output tube 201, and the output hole 212 is located inside the connecting sleeve 202; Specifically, the output hole 212 on the outer surface of the output tube 201 is staggered with the upper end of the air guide groove 211. After the output tube 201 rotates, the output hole 212 and the air guide groove 211 are connected to each other. A limiting groove is provided at the upper end of the connecting sleeve 202. A convex block is fixedly installed on the outer surface of the output tube 201. The convex block is inserted into the limiting groove. At this time, the rotation angle of the output tube 201 is determined by the size of the space in the limiting groove. More specifically, an air relief groove is provided on the outer surface of the output tube 201. The air relief groove corresponds to the outer surface of the air guide groove 211. The air guide groove 211 is in a "U" shape, and a push rod 205 is provided at the output port of the air guide groove 211, and one end of the push rod 205 away from the isolation sleeve 101 is fixedly connected to the upper end of the push rod 205. When the output hole 212 is connected to the air guide groove 211, the air blown out from the output hole 212 enters the interior of the air guide groove 211, and then the pressure inside the air guide groove 211 increases, and at this time, the passive rod 204 is driven to move upward through the push rod 205; A reversing rod 209 is fixedly installed inside the output pipe 201. A plurality of flow grooves are provided on the outer surface of the reversing rod 209 to facilitate air flow. A plug plate 210 is rotatably installed on the bottom end of the reversing rod 209. A plurality of notches are provided on the outer surface of the plug plate 210, which correspond to the grooves on the outer surface of the reversing rod 209. When the reversing rod 209 rotates by a certain angle (at this time, the output hole 212 is connected to the air guide groove 211), the notches on the outer surface of the plug plate 210 and the grooves on the outer surface of the reversing rod 209 are intertwined. At this time, the air will not pass through the plug plate 210.

[0022] Example 2: Please refer to Figure 5 - Figure 7 , Fig.12 , an anti-oxidation device suitable for a molybdenum-based alloy reactor, based on Example 1, an inner tube 206 is arranged between the passive rod 204 and the reset tube 203, a plug plate 210 is fixedly welded to the inner end of the inner tube 206, and an output tube 201 is penetrated through the outer surface of the inner tube 206, and a reversing rod 209 is penetrated through the inside of the inner tube 206.

[0023] The multi-stage nozzle device includes a central tube 301, which is inserted into the outer protective tube 102, and the end of the central tube 301 away from the outer protective tube 102 is fixedly connected to the isolation sleeve 101, and the inner end of the central tube 301 is inserted with a movable tube 302, and the movable tube 302 is fixedly connected to the inner tube 206 (such as Fig.12 As shown in the figure, a baffle block 207 is fixedly installed at the inner end of the inner tube 206, and the baffle block 207 is used to limit the flow resistance of the airflow, so that after the gas passes through the inner tube 206, a certain resistance is generated by the baffle block 207, so that it generates a downward thrust; The outer surface of the central tube 301 is covered with a stabilizing sleeve 303 and a heating sleeve 304 in sequence. The heating sleeve 304 is fixedly connected to the bottom tube 103, and the stabilizing sleeve 303 is fixedly connected to the outer protective tube 102. Two air guide holes 402 are provided inside the stabilizing sleeve 303, and the air guide holes 402 are located below the outer protective tube 102. A limiting flow ring 403 is fixedly installed on the outer surface of the central tube 301, and the stabilizing sleeve 303 and the heating sleeve 304 located above the bottom tube 103 are connected to the two adjacent outer protective tubes in sequence. 102 is fixedly connected. Specifically, the outer shell of the heating sleeve is 304 stainless steel, and the interior is filled with aluminum alloy material, with a melting point of about 600°C, which is close to the conventional working temperature range of the reactor 1. The alloy material with different melting points can also be replaced according to actual production needs. When the aluminum alloy is not melted, the current limiting ring 403 is wrapped to fix it. When the aluminum alloy is melted, the bonding force to the current limiting ring 403 is lost. Driven by the deadweight of the bottom tube 103, the heating sleeve 304 moves downward accordingly. More specifically, the upper end of the bottom tube 103 wraps the air guide hole 402 inside the stabilizing sleeve 303 , so when the bottom tube 103 moves downward, the air guide hole 402 is exposed.

[0024] See also Fig. 9 , Fig.10 , Fig.11 Two connecting pipes 401 are fixedly installed at the inner end of the stabilizing sleeve 303, and the connecting pipes 401 are connected with the air guide holes 402. An unlocking ring 404 is fixedly welded to the upper end of the heating sleeve 304. A plurality of triangular blocks 405 are fixedly installed on the upper end of the unlocking ring 404, and the triangular blocks 405 correspond to the connecting pipe 401. An air outlet plug 407 is penetrated at the inner end of the connecting pipe 401, and a strip hole is opened on the outer surface of the air outlet plug 407. After the air outlet plug 407 moves away from the connecting pipe 401, the strip hole is between the inside and the outside of the connecting pipe 401, so that air can flow to the outside of the connecting pipe 401 through the air outlet plug 407. The outer surface of 7 is fixedly connected with a snap-on plate 406, and the outer surface of the snap-on plate 406 contacts the inclined surface of the outer surface of the triangular block 405. When the unlocking ring 404 moves downward, the triangular block 405 is driven to move, thereby driving the snap-on plate 406 to move downward. As the activity space of the snap-on plate 406 increases, the air outlet plug 407 obtains enough moving space to realize free movement. On the contrary, after the triangular block 405 moves upward, the snap-on plate 406 is squeezed by the inclined surface, so that the air outlet plug 407 moves toward the inside of the connecting pipe 401. At this time, the strip hole on the outer surface of the air outlet plug 407 will be wrapped by the connecting pipe 401, so that the air cannot flow out. Specifically, an air outlet is provided on the outer surface of the central tube 301, and the air outlet is corresponding to the connecting tube 401. The air outlet is strip-shaped, so that the connecting tube 401 can be connected with the air outlet on the outer surface of the central tube 301 wherever it is located. The outer surface of the movable tube 302 is also provided with strip-shaped air holes, and the strip-shaped air holes are connected with the air outlet on the outer surface of the central tube 301. The outer surface of the movable tube 302 is provided with a sliding groove, and a rectangular block is fixedly installed on the inner end of the central tube 301. The rectangular block is inserted into the sliding groove, so that the movable tube 302 will not rotate when moving up and down.

[0025] A passive ring 305 is sleeved on the outer surface of the central tube 301. The passive ring 305 is located below the bottom tube 103 and is fixedly mounted on the bottom end of the movable tube 302. When the bottom tube 103 moves downward, the passive ring 305 is pushed to move the movable tube 302 downward, thereby driving the inner tube 206 to move in the same direction. An air leakage hole is provided on the lower outer surface of the central tube 301. When the air guide hole 402 is not exposed, gas can be injected into the reactor 1 through the air leakage hole. After the bottom tube 103 moves downward, the air leakage hole is blocked.

[0026] Example 3: Please refer to Figure 2 , Fig.13, an anti-oxidation device suitable for a molybdenum-based alloy reactor, based on embodiments 1 and 2, a heating tube 2 for preheating an inert gas is wound on the outer surface of the reactor 1, and the heat emitted by the reactor 1 during operation is transferred to the heating tube 2 through the outer wall, thereby heating the inert gas flowing inside, an air outlet pipe 7 is penetrated at the upper end of the sealing cover 3, an input end of the air outlet pipe 7 is penetrated inside the reactor 1, and a spiral tube 11 is disposed inside the air outlet pipe 7, and the spiral tube 11 is fixedly connected to the heating tube 2 through a conducting tube 8; When the high-temperature gas inside the reactor 1 is discharged from the gas outlet pipe 7, it will pass through the spiral tube 11, thereby further heating it to prevent the low-temperature inert gas from entering the reactor 1, causing local sudden cooling inside to produce stress cracks, thereby affecting the normal working temperature inside the reactor 1 and disturbing the reaction balance. The upper end of the integration pipe 5 is rotatably mounted with a diverter cover 12, and the outer surface of the diverter cover 12 is fixedly connected with an insulation pipe 6, and the free end of the insulation pipe 6 is fixedly connected to the upper end of the gas outlet pipe 7, and the diverter cover 12 is fixedly connected to the output pipe 201; An air outlet is provided at the upper end of the diverter cover 12. The air flowing out from the air outlet pipe 7 passes through the insulation tube 6 and then flows out from the air outlet above the diverter cover 12. The free end of the spiral tube 11 is fixedly connected to the output tube 201. More specifically, the spiral tube 11 and the insulation tube 6 are both made of copper with a certain plasticity, which not only ensures the flexibility of the structure, but also does not interfere with the rotation function of the diverter cover 12.

[0027] The working principle of the present invention is: When in use, the heating device first heats the chamber inside the reactor 1, and as the temperature inside the reactor 1 gradually rises, the inert gas then enters the integrated tube 5 from the heated tube 2, is transmitted to the movable tube 302 through the inner tube 206, and is finally injected into the reactor 1. With the characteristic that the density of the inert gas is higher than that of oxygen, the inert gas slowly rises from the bottom of the reactor 1, effectively replacing the oxygen in the reactor and forming a good inert atmosphere environment; As the temperature inside the reactor 1 gradually increases, the reaction system enters a predetermined working state. During this period, some reactants may release oxygen atoms during the thermal reaction process, so it is necessary to continuously inject inert gas into the reactor 1 to effectively replace the generated oxygen. Subsequently, the aluminum alloy material inside the heating sleeve 304 melts after being heated to the melting point, and at this time, it loses its adhesion to the limiting ring 403. Driven by the deadweight of the bottom tube 103, the heating sleeve 304 moves downward, and the air guide hole 402 is exposed. When the movable tube 302 moves downward, the passive rod 204 is pulled downward by the traction rod 104. At this time, the auxiliary spring 208 is compressed, and the push rod 205 is forced to move downward, and the air inside its air guide groove 211 flows out from the air release groove on the outer surface of the output tube 201.

[0028] The air leakage holes on the outer surface of the central tube 301 are blocked by the bottom tube 103 moving downward, and the inert gas in the movable tube 302 is released through the air guide holes 402. The air guide holes 402 arranged between the multiple outer protective tubes 102 are exhausting in coordination, so that the inert gas can be more efficiently filled into the reactor 1, thereby improving the inflation speed and distribution uniformity; When the production is finished, the diverter cover 12 is clamped by a tool and rotated. At this time, the diverter cover 12 drives the output pipe 201 to rotate, so that the output hole 212 corresponds to the gas guide groove 211. At this time, the inert gas flows out from the output hole 212 and enters the gas guide groove 211. As the internal pressure of the gas guide groove 211 increases, the push rod 205 drives the passive rod 204 to move upward. As the passive rod 204 moves upward, the passive rod 204 drives the bottom tube 103 to move upward through the traction rod 104. At this time, the outer protective tube 102 and the bottom tube 103 are in contact with each other, and the gas guide hole 402 is re-sealed. At the same time, as the heated sleeve 304 moves upward, the liquid aluminum alloy inside it re-wraps the flow limiting ring 403 and naturally solidifies and forms during the cooling process. The solidified aluminum alloy can achieve stable fixation of the flow limiting ring 403, thereby preventing the outer protective tube 102 and the bottom tube 103 from sliding down under the action of gravity.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed in the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-oxidation device suitable for a molybdenum-based alloy reactor, comprising a reactor (1), characterized in that: A sealing cover (3) is fixedly mounted on the upper end of the reaction kettle (1), an integrated pipe (5) is passed through the upper end of the sealing cover (3) for connecting to an external gas source, an isolation sleeve (101) is fixedly connected to one end of the integrated pipe (5) close to the reaction kettle (1), and the isolation sleeve (101) is located below the sealing cover (3), a plurality of outer protective pipes (102) are arranged below the isolation sleeve (101), and a multi-stage nozzle device is arranged inside the outer protective pipe (102) for spraying inert gas to realize layered supply of reaction gas. To protect the inner wall of the reactor (1) from oxidation, the bottom end of the reactor (1) is provided with a temperature-controllable heating device for heating the chamber inside the reactor (1), a bottom tube (103) is provided below the outer protective tube (102), and a traction rod (104) is fixedly installed on the outer surface of the bottom tube (103), a passive rod (204) is passed through the inner end of the isolation sleeve (101), and one end of the traction rod (104) away from the bottom tube (103) is fixedly connected to the outer surface of the passive rod (204).

2. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 1, characterized in that: The outer protective tube (102) and the bottom tube (103) are connected via a connecting ring (105), and the upper and lower ends of the connecting ring (105) are respectively sleeved on the adjacent ends of the outer protective tube (102) and the bottom tube (103). An output tube (201) is passed through the inner end of the integration tube (5), and a connecting sleeve (202) is sleeved on the outer surface of the output tube (201). The connecting sleeve (202) is fixedly connected to the inner wall of the integration tube (5), and one end of the connecting sleeve (202) close to the isolation sleeve (101) is fixedly connected to two reset tubes (203).

3. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 2, characterized in that: The reset tube (203) and the passive rod (204) are interlaced with each other; an air guide groove (211) is provided inside the communication sleeve (202) and the reset tube (203); an output hole (212) is provided on the outer surface of the output tube (201); the output hole (212) is located inside the communication sleeve (202); the output hole (212) on the outer surface of the output tube (201) is interlaced with the upper end of the air guide groove (211); after the output tube (201) rotates, the output hole (212) and the air guide groove (211) are interconnected; an inner tube (206) is provided between the passive rod (204) and the reset tube (203); and the output tube (201) is penetrated through the outer surface of the inner tube (206).

4. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 1, characterized in that: The multi-stage nozzle device comprises a central tube (301), the central tube (301) being inserted into the interior of an outer protective tube (102), and one end of the central tube (301) away from the outer protective tube (102) being fixedly connected to an isolation sleeve (101), a movable tube (302) being inserted into the inner end of the central tube (301), and a stabilizing sleeve (303) and a heating sleeve (304) being sequentially sleeved on the outer surface of the central tube (301).

5. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 4, characterized in that: The heating sleeve (304) is fixedly connected to the bottom tube (103), the stabilizing sleeve (303) is fixedly connected to the outer protective tube (102), two air guide holes (402) are provided inside the stabilizing sleeve (303), and the air guide holes (402) are located below the outer protective tube (102), and a limiting flow ring (403) is fixedly installed on the outer surface of the central tube (301).

6. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 5, characterized in that: Two connecting tubes (401) are fixedly mounted on the inner end of the stabilizing sleeve (303), and the connecting tubes (401) are in communication with the air guide holes (402). An unlocking ring (404) is fixedly connected to the upper end of the heating sleeve (304), and a plurality of triangular blocks (405) are fixedly mounted on the upper end of the unlocking ring (404).

7. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 6, characterized in that: The triangular block (405) corresponds to the connecting pipe (401); an air outlet plug (407) is provided at the inner end of the connecting pipe (401); a clamping plate (406) is fixedly connected to the outer surface of the air outlet plug (407); and the outer surface of the clamping plate (406) contacts the inclined surface of the outer surface of the triangular block (405).

8. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 7, characterized in that: The outer surface of the central tube (301) is sleeved with a passive ring (305), the passive ring (305) is located below the bottom tube (103), and the passive ring (305) is fixedly mounted on the bottom end of the movable tube (302). When the bottom tube (103) moves downward, the passive ring (305) is pushed, causing the movable tube (302) to move downward accordingly.

9. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 1, characterized in that: A heat receiving tube (2) for preheating inert gas is wound around the outer surface of the reactor (1); an air outlet pipe (7) is passed through the upper end of the sealing cover (3); an input end of the air outlet pipe (7) is passed through the interior of the reactor (1); and a spiral tube (11) is provided inside the air outlet pipe (7); the spiral tube (11) and the heat receiving tube (2) are fixedly connected via a conducting tube (8).

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