Molten salt electrolysis collection system and control method thereof

Abstract

The invention discloses a molten salt electrolysis collecting system and a control method thereof.The molten salt electrolysis collecting system comprises a crucible extracting device and a discharging forming device, the crucible extracting device comprises a base assembly, a Z-axis rotating module arranged on the base assembly and a Z-axis lifting module arranged at the action end of the Z-axis rotating module; the linear transferring module is arranged at the action end of the Z-axis lifting module, and a clamping assembly is arranged at the action end of the linear driving module; the clamping assembly comprises a plurality of clamping units; the clamping unit comprises a clamping arm used for executing grabbing and releasing actions, a clamping groove is formed in the tail end of the clamping end on one side directly facing the crucible, and a horizontally arranged supporting surface and an S-shaped guide surface located at the top are arranged at the bottom of the clamping groove. The clamping groove is formed in the tail end of the clamping end right opposite to one side of the crucible, the horizontally-arranged supporting face is arranged at the bottom of the clamping groove, and the S-shaped guiding face is located at the top of the clamping groove, so that the crucible can be conveniently guided into the clamping groove, and the crucible can be better grabbed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of molten salt electrolysis collection system, and particularly relates to a molten salt electrolysis collection system and a control method thereof. BACKGROUND

[0002] At present, the rare earth electrolysis process is the main method for producing and preparing rare earth metals, and an electrolytic cell is the main equipment of the process, and the structure of the electrolytic cell directly affects the quality of the rare earth metal product, the working efficiency and the production cost. The existing electrolytic furnace usually places a molybdenum pot for collecting rare earth metals at the bottom of the furnace, and is provided with a graphite anode around the hearth, and a tungsten rod is inserted into the middle of the hearth as a cathode. Under the action of the inter-electrode electric field between the cathode and the anode, the rare earth electrolysis work is carried out.

[0003] Before the electrolysis work, the molten salt electrolysis collection system needs to configure a clamping assembly to transfer the crucible into the electrolytic furnace, or after the electrolysis work is completed (at this time, the temperature is relatively low), the crucible is transferred to a forming device for pouring. With the expansion of the production line, the size of the crucible increases, and more requirements are generated for the transfer process of the crucible. The existing clamping structure is too simple, and only has a single point contact with the crucible, which is easy to cause loose clamping and bring harm to the pouring of the crucible. SUMMARY

[0004] The present application proposes a molten salt electrolysis collection system to solve the defects that the existing molten salt electrolysis collection system has with the expansion of the production line, the size of the crucible increases, and more requirements are generated for the transfer process of the crucible. The existing clamping structure is too simple, and is easy to cause loose clamping and bring harm to the pouring of the crucible.

[0005] The technical scheme adopted by the present application is as follows: A molten salt electrolysis collection system is located in a transfer region defined between adjacent first and second electrolytic furnaces, and comprises a crucible extraction device and a discharging and forming device. The crucible extraction device comprises a base assembly, a Z-axis rotating module arranged on the base assembly, a Z-axis lifting module arranged on the action end of the Z-axis rotating module, and a linear transfer module arranged on the action end of the Z-axis lifting module. A clamping assembly is arranged on the action end of the linear driving module. The clamping assembly comprises a plurality of clamping units. The clamping unit comprises a clamping arm for performing a grabbing and releasing action. The end of the clamping end opposite to the crucible is provided with a clamping groove. The bottom of the clamping groove is provided with a horizontally arranged supporting surface and an S-shaped guide surface at the top.

[0006] Optionally, the discharging and forming device is provided with a crucible discharging assembly for positioning the crucible and a forming and receiving assembly. The crucible discharging assembly is located in the transfer path of the clamping assembly, and the crucible discharging assembly receives the crucible from the first and second electrolytic furnaces and transfers the crucible to the forming and receiving assembly.

[0007] Optionally, the card slot is provided with a fastening detection plate outside, the fastening detection plate comprises a plate body, a sealed cavity is arranged in the plate body, an opening is arranged at the top of the plate body, and a fastening column body matched with the opening is arranged in the opening; a liquid is filled in the cavity, the plate body is made of elastic metal material, and the plate body comprises an outer shell and an inner shell.

[0008] Preferably, the fastening detection plate is arc-shaped, and the fastening detection plates on the plurality of clamping arms are combined into a complete circle when the plurality of clamping arms are combined and closely attached to the crucible.

[0009] Optionally, the outer shell is made of metal material, and the inner shell is provided with heat insulation and heat resistant flexible material outside.

[0010] Optionally, the cavity is provided with a telescopic cylinder, the telescopic cylinder comprises an outer cylinder body and an inner cylinder body inserted into the outer cylinder body, a temperature sensor is arranged in the outer cylinder body, and an elastic telescopic piece made of memory metal material is arranged at the bottom of the inner cylinder body; and the movable end of the telescopic elastic piece is connected to the temperature sensor arranged at the bottom end of the outer cylinder body.

[0011] Optionally, the top of the plate body is further covered with a ceramic fiber fabric; the inner shell and the heat insulation and heat resistant flexible material are both provided with a perforation through which the inner cylinder body passes, and a ceramic heat conducting sheet is fixed at the end of the perforation of the heat insulation and heat resistant flexible material.

[0012] Optionally, the two ends of the clamping arm are a driving end and a clamping end respectively, and the driving end and the clamping end move reversely.

[0013] Optionally, the clamping assembly further comprises a driving assembly and a hinged seat, the driving assembly is arranged at the driving end of the clamping arm to drive the driving end, and the hinged seat is arranged inside the plurality of clamping arms.

[0014] Optionally, a hinged end of the clamping arm is connected to the hinged seat, so that the driving end and the clamping end rotate around the hinged end; the driving assembly comprises a three-jaw chuck driven by a servo motor, the driving end of the clamping arm is connected to a movable jaw of the three-jaw chuck, and moves along the radial direction of a chuck body of the three-jaw chuck, so that the clamping end is switched between the grabbing position and the open position.

[0015] Optionally, a dustproof disc is arranged outside the driving assembly, the three-jaw chuck is arranged in the dustproof disc, a transmission rod is arranged in the dustproof disc and moves radially, a displacement sensor is arranged outside the three-jaw chuck to detect the movement length of the transmission rod, and the control unit is used for detecting the torque output percentage of the servo motor and receiving the movement length signal of the transmission rod transmitted by the displacement sensor.

[0016] Optionally, the heat insulation and heat resistant flexible material is made of ceramic fiber fabric.

[0017] The present invention also discloses a control method for a molten salt electrolysis collection system, comprising the following steps: 1) When the transmission rod moves radially along the dustproof disc, the driving end is displaced horizontally. Since the hinged end in the middle of the clamping arm is fixed in the horizontal direction, the driving end rotates relative to the transmission rod, and the clamping end moves inward. That is, the multiple clamping ends are brought together to clamp the molybdenum pot in the electrolytic cell. 2) When L is satisfied t =L0,S t =S0, it is determined that the clamping is successful; when L t =L0,S t > S0, it is determined that the clamping fails, and the system increases the servo torque output until L t <L max , S t =S0, determine that the clamping is successful, if L t =L max , S t > S0, it is determined that the clamping fails, the equipment is reset, and manual intervention is required. Once S t <S0, the equipment is operating normally. After the operation is completed, the clamping jaw is judged to be deformed, an alarm is given, and manual intervention is required; 3) When releasing, the servo motor is in position mode and monitors the torque output percentage; when S t =S0,L t <L max , the clamping is judged to be successful; when S t =S0,L t >L max , determine that the bottom furnace ore is abnormal, the clamping claw is deformed, and the equipment is operating normally, an alarm is issued, and manual intervention is required.

[0018] In summary, the present invention has the following beneficial effects: 1. The present invention provides a slot at the end of the clamping end on the side facing the crucible, and a horizontally arranged supporting surface and an S-shaped guiding surface at the top of the slot are provided to facilitate entry and better grasping of the crucible.

[0019] 2. When the clamping arms of the multiple clamping units in the present invention are combined and pressed against the crucible, the fastening detection plates on the multiple clamping arms are combined into a complete circle, forming a curved surface to support the crucible as a whole, which has a good clamping effect on bucket-shaped crucibles; further, the supporting surface forms a multiple support structure, and even if the crucible is separated from the curved surface, the crucible flange can be clamped again.

[0020] 3. In the present invention, as the clamping arms merge and cling to the crucible, the fastening column protrudes upward, pressing against the flange of the crucible, and the inner shell deforms, so that the contact area with the crucible is larger, and there are multiple support points in both the horizontal and vertical directions for a more secure clamping.

[0021] 4. The ceramic heat conducting plate in the present invention increases the heat transfer efficiency on the one hand, making the temperature sensor measure more accurately. On the other hand, the protruding ceramic heat conducting plate pushes the heat-insulating and heat-resistant flexible material to bulge downward, forming multiple contact friction points, forming more friction points, and enhancing the fastening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 1 is a top view of the structure of the molten salt electrolysis collection system of Example 1 of the present invention; Figure 2 is a perspective view of a crucible extraction device of a molten salt electrolysis collection system according to Example 1 of the present invention; Figure 3 is an exploded view of a clamping assembly of a molten salt electrolysis collection system according to Example 1 of the present invention; Figure 4 is an internal diagram of a clamping assembly of a molten salt electrolysis collection system according to Example 1 of the present invention; Figure 5 is a perspective view of a clamping assembly of a molten salt electrolysis collection system according to Example 2 of the present invention; Figure 6 This is a diagram of the internal structure of a fastening detection plate of a molten salt electrolysis collection system according to Example 2 of the present invention; Figure 7 It is a three-dimensional diagram of the clamping assembly of the molten salt electrolysis collection system according to Example 4 of the present invention.

[0023] The reference numerals in the figures are: First electrolytic furnace, 2. Second electrolytic furnace, 3. Crucible extraction device, 4. Discharging and forming device, 5. Base assembly, 6. Z-axis rotation module, 7. Z-axis lifting module, 8. Linear transfer module, 10. Clamping unit, 11. Servo motor, 12. Clamping arm, 13. Drive assembly, 14. Articulated seat, 15. Drive end, 16. Clamping end, 17. Three-jaw chuck, 18. Movable clamping jaw, 19. Dustproof plate, 20. Transmission rod, 21. Connecting groove, 22. Guide seat , 23. Correction plate, 24. Card slot, 25. Support surface, 26. S-shaped guide surface, 27. Fastening detection plate, 28. Crucible discharge assembly, 29. Molding material receiving assembly, 30. Plate body, 31. Cavity, 32. Opening, 33. Outer shell, 34. Inner shell, 35. Fastening column, 36. Outer cylinder, 37. Inner cylinder, 38. Temperature sensor, 39. Elastic telescopic part, 40. Perforation, 41. Flange, 42. Ceramic thermal conductive sheet, 43. Displacement sensor. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application will be further described in detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0025] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Example 1 The technical solutions adopted by the present application are as follows: As Figure 1 , Figure 2 , Figure 3 and Figure 4 indicate, the present application discloses a molten salt electrolysis collection system located between the first electrolysis furnace 1 and the second electrolysis furnace 2 arranged adjacent to each other to define a transfer area, and each of the first electrolysis furnace and the second electrolysis furnace is provided with an electrolysis cavity for accommodating a crucible, comprising: a crucible extraction device 3 and a discharge forming device 4, the crucible extraction device comprising a base assembly 5, a Z-axis rotating module 6 arranged on the base assembly, a Z-axis lifting module 7 arranged on the action end of the Z-axis rotating module, and a linear transfer module 8 arranged on the action end of the Z-axis lifting module, and a detachable clamping assembly is arranged on the action end of the linear driving module. The top of the outer sidewall of the crucible is provided with a flange 41. The discharge forming device is provided with a crucible discharge assembly 28 and a forming receiving assembly 29 for positioning the crucible.

[0027] The clamping assembly comprises a plurality of clamping units 10; the clamping unit comprises a clamping arm 12 for performing grabbing and releasing actions, a driving assembly 13 and a hinged seat 14, two ends of the clamping arm are respectively a driving end 15 and a clamping end 16, and the driving end and the clamping end move reversely.

[0028] The hinge seat is arranged inside the plurality of clamping arms, the hinge end of the clamping arms is connected to the hinge seat, so that the driving end and the clamping end rotate around the hinge end; the driving assembly comprises a three-jaw chuck 17 driven by a servo motor 11, the driving end of the clamping arm is connected to the movable jaw 18 of the three-jaw chuck, and the movable jaw moves along the radial direction of the chuck body of the three-jaw chuck, so that the clamping end is switched between the grabbing position and the open position.

[0029] In one embodiment, a transmission box is arranged on the dustproof disc, a transmission assembly is arranged in the transmission box, the transmission assembly is a belt pulley assembly, which comprises a driving pulley connected to the output shaft of the driving part, a driven pulley connected to the three-jaw chuck, and a transmission belt connected between the driving pulley and the driven pulley; at the same time, the driven pulley is provided with a driving rod extending into the three-jaw chuck to drive the three-jaw chuck.

[0030] The driving assembly is externally provided with a dustproof disc 19, the three-jaw chuck is arranged in the dustproof disc, and the clamping arm is located outside the dustproof disc.

[0031] A transmission rod 20 is arranged in the dustproof disc and moves radially, one end of the transmission rod is limitingly connected to the movable jaw, and the other end extends out of the dustproof disc and is hingedly connected to the driving end of the clamping arm.

[0032] The inner end of the transmission rod is provided with a connecting groove 21 towards the movable jaw side, the jaw part of the movable jaw extends into the connecting groove; a guide seat 22 is further arranged in the dustproof disc, and the transmission rod is slidingly arranged in the guide groove of the guide seat. A sliding groove capable of accommodating the movable jaw extending and sliding in the axial direction is formed in the guide groove. The present application is especially suitable for large-size production lines and is used for processing large-size crucibles.

[0033] In this embodiment, the three-jaw chuck is a three-jaw chuck structure commonly used in mechanical processing equipment in the prior art.

[0034] The dustproof disc is provided with an avoiding hole capable of accommodating the transmission rod extending out, a sealing ring is arranged in the avoiding hole to form a seal between the hole wall and the transmission rod. The inside of the avoiding hole is provided with an abutting part, and the outside is provided with a sealing cover, which limits the sealing ring in the avoiding hole.

[0035] The end of the clamping end opposite to the crucible is provided with a clamping groove 24, the bottom of the clamping groove is provided with a horizontally arranged supporting surface 25 and an S-shaped guide surface 26 located at the top.

[0036] In one embodiment, the first electrolytic furnace, the second electrolytic furnace, the crucible extraction device and the discharge forming device are arranged on the same horizontal reference plane concrete base.

[0037] In the embodiment, the end of the support platform is provided with a correction plate 23, which is located in the action path of the clamping unit, and the correction plate is provided with correction points corresponding to the clamping unit, which are arranged in relation to the gripping pose or the open pose of the clamping unit.

[0038] In the embodiment, when the transmission rod moves radially along the dustproof disc, the driving end is displaced in the horizontal direction. Since the hinge end in the middle of the clamping arm is a fixed position in the horizontal direction, the driving end rotates relative to the transmission rod, and the clamping end moves inward, that is, the plurality of clamping ends form a converging shape, thereby clamping the molybdenum pot in the electrolytic cell.

[0039] Embodiment 2 The difference between Embodiment 2 and Embodiment 1 is that, as shown in Figure 5 and Figure 6 In the embodiment, the side wall of the crucible is inclined and forms a bucket shape. The end of the clamping end opposite to the crucible is provided with a clamping groove, and a fastening detection plate 29 is arranged outside the clamping groove. The fastening detection plate includes a plate body 30, a sealed cavity 31 is arranged in the plate body, an opening 32 is arranged at the top of the plate body, and the plate body includes an outer shell 33 and an inner shell 34. The outer shell is made of metal material, the inner shell is made of elastic metal material, and a heat-resistant flexible material is arranged outside the inner shell. A fastening column 35 is arranged in the opening, and a ceramic fiber fabric is arranged on the top of the plate body. A liquid is filled in the cavity. The fastening detection plate is arc-shaped, and the clamping arms of the plurality of clamping units are combined and closely attached to the crucible, and the fastening detection plates on the plurality of clamping arms are combined into a complete circle.

[0040] A telescopic cylinder is arranged in the cavity. The telescopic cylinder includes an outer cylinder body 36 and an inner cylinder body 37 inserted into the outer cylinder body. A temperature sensor 38 is arranged in the outer cylinder body. An elastic telescopic part 39 made of memory metal material is arranged at the bottom of the inner cylinder body. The inner cylinder body is made of copper material. The movable end of the telescopic elastic part is connected to the temperature sensor arranged at the bottom end of the outer cylinder body. The inner shell and the heat-resistant flexible material are both provided with a perforation 40 through which the inner cylinder body passes. A ceramic heat-conducting sheet 42 is fixed at the end of the perforation of the heat-resistant flexible material. On one hand, the ceramic heat-conducting sheet increases the heat transfer efficiency, so that the temperature sensor can measure more accurately. On the other hand, the protruding ceramic heat-conducting sheet pushes the heat-resistant flexible material to protrude downward, cooperates with the heat extension of the elastic telescopic part (the elastic telescopic part will contract below the metamorphic temperature), so that the ceramic heat-conducting sheet closely contacts the outer side wall of the crucible, forms a plurality of contact friction points, forms more friction points, and enhances the fastening efficiency.

[0041] In the embodiment, a wireless transmitting device is further arranged at one side of the temperature sensor. The temperature sensor and the wireless transmitting device can be arranged together. Specifically, an NTC temperature sensor can be used, and a small wireless transmitting device can be arranged.

[0042] At present, temperature control is the core process link in the rare earth electrolysis transfer process, which directly affects the metal quality, current efficiency and energy consumption. Generally, an intelligent temperature control system is adopted, and the infrared thermal imager and laser-induced breakdown spectrometer of the intelligent temperature control system are used to predict temperature trend, so that the temperature fluctuation in the cell is controlled within ±1.5%. However, when the transfer crucible is used, the temperature in the crucible is too low to affect the crystallization of rare earth. The fastening detection plate at the end of the clamping arm in the present application provides a detection point, which is convenient for gap judgment and temperature detection of the material in the crucible, and does not need to separately set a detection position. In particular, during electrolysis, the oxides at normal temperature are supplemented at any time, and in a short time, they float on the surface, which affects the infrared temperature sensor and causes large temperature fluctuation and data distortion. The temperature sensor at the clamping end provides an auxiliary point for directly monitoring the temperature, which avoids the data distortion caused by the oxides floating on the surface.

[0043] At present, during the electrolysis process of the electrolytic furnace, electrolytic waste gas is generated, and metal impurities are often mixed in the waste gas. When the metal impurities float with the waste gas, they will enter between the transmission components on the upper end of the clamping arm, causing the transmission components to be stuck after adhering too much metal impurities, thereby affecting the normal use of the device. The top of the plate body is also covered with a ceramic fiber fabric to ensure the sealing of the fastening detection plate.

[0044] When the present embodiment is implemented, the clamping end closely abuts the crucible, and the fastening detection plate detects the temperature of the crucible on one side, while the upper end of the fastening detection plate abuts against the flange of the crucible. When the clamping arms of the plurality of clamping units are combined and closely abut the crucible, the fastening detection plates on the plurality of clamping arms are combined into a complete circle to form a curved surface, thereby supporting the crucible as a whole, and the clamping effect on the crucible is good.

[0045] As the clamping arms are combined and closely abut the crucible, the fastening columns protrude upward and abut against the flange of the crucible, and the inner shell deforms, thereby increasing the contact area with the crucible and providing multiple support points in the transverse and longitudinal directions to make the clamping more firm. Moreover, the temperature sensor records the temperature of the crucible in real time and transmits it to the intelligent temperature control system in the data center, thereby providing more accurate monitoring of the temperature of the crucible.

[0046] Embodiment 3 The difference between embodiment 3 and embodiment 2 is that the cavity is filled with a solid-liquid phase change material with large specific heat capacity. The solid-liquid phase change material is in a solid state at 100 degrees Celsius and is in a liquid state at a temperature higher than 100 degrees Celsius.

[0047] In the present embodiment, the solid-liquid phase change material absorbs part of the heat to avoid exceeding the working temperature of the wireless transmission device and the elastic expansion member.

[0048] During the implementation of this embodiment, when the clamping assembly transfers the crucible into the electrolytic furnace, the clamping end is in close contact with the crucible, and the fastening detection plate itself will not be deformed. It should be noted that the crucible temperature is not high at this time, and the safety risk is very small. However, after the electrolysis work is completed, the crucible is transferred to the forming device for dumping. At this time, the crucible flips over and falls off, and the risk of spilling the material is even greater. The solid-liquid phase change material in the cavity is heated and becomes liquid. The clamping arm is combined and close to the crucible, and its fastening column protrudes upward, pressing against the flange of the crucible, and the inner shell is deformed, so that its contact area with the crucible is larger, and there are multiple support points in both the horizontal and vertical directions to make the clamping more secure.

[0049] On the one hand, the ceramic thermal conductive sheet increases the heat transfer efficiency, making the temperature sensor measure more accurately. On the other hand, the protruding ceramic thermal conductive sheet pushes the heat-insulating and heat-resistant flexible material to bulge downward, forming multiple contact friction points, creating more friction points and enhancing the fastening efficiency.

[0050] Multiple temperature sensors at different heights are used to detect the side wall temperature of the crucible, facilitating analysis by the intelligent temperature control system.

[0051] Example 4 The difference between Example 3 and Example 2 is that Figure 7 As shown, the clamping arm is provided with a hinged end connected to the hinged seat so that the driving end and the clamping end rotate around the hinged end; the driving assembly includes a three-jaw chuck driven by a servo motor, and the driving end of the clamping arm is connected to the movable jaw of the three-jaw chuck, and as the movable jaw moves along the radial direction of the chuck body of the three-jaw chuck, the clamping end switches between the grasping position and the open position.

[0052] A dustproof disk is provided on the outside of the driving component, the three-jaw chuck is provided inside the dustproof disk, a transmission rod is provided in the radial direction inside the dustproof disk, a displacement sensor 43 is installed on the outside of the three-jaw chuck for detecting the movement length of the transmission rod, and the control unit is used to detect the torque output percentage of the servo motor and receive the movement length signal of the transmission rod transmitted by the displacement sensor.

[0053] In one embodiment, the displacement sensor is a Hall-type displacement sensor, and the magnet thereof is located near the end of the transmission rod.

[0054] Example 5 The present invention also discloses a control method for a molten salt electrolysis collection system, comprising the following steps: 1) When the transmission rod moves radially along the dustproof disc, the driving end is displaced horizontally. Since the hinged end in the middle of the clamping arm is fixed in the horizontal direction, the driving end rotates relative to the transmission rod, and the clamping end moves inward. That is, the multiple clamping ends are brought together to clamp the molybdenum pot in the electrolytic cell. 2) When L is satisfiedt =L0, S t =S0, determine clamping success; when L t =L0, S t >S0, determine clamping failure, system increases servo torque output until L t <L max , S t =S0, determine clamping success, like L t =L max , S t >S0, determine clamping failure, device reset, manual intervention; once S t <S0, device normal operation, end of operation, determine clamping deformation, give alarm, manual intervention; 3) when loosening, servo motor is in position mode, monitor torque output percentage; when S t =S0, L t <L max , determine clamping success; when S t =S0, L t >L max , determine bottom furnace ore anomaly, clamping deformation, device normal operation ends, alarm, manual intervention.

[0055] In the embodiment, L t is the designed value of servo driver load percentage (normal value), L max is the maximum value of servo driver load percentage (normal value), L t is the current value of servo driver load percentage, S0 is the maximum displacement of preset clamping and loosening, S t is the final displacement in single operation. In one embodiment, when loosening, the servo motor is in position mode, and the output current and driver are used to monitor the torque output percentage. The load rate is calculated based on the current ratio: the load rate formula is: load rate = actual output current / rated current × 100%. The control unit can use a computer system or PLC (programmable logic controller).

[0056] The above only describes the preferred embodiments of the present application, and does not limit the patent protection scope of the present application, any equivalent structural transformation based on the content of the present application specification and drawings, direct or indirect application in other related technical fields, are also included in the protection scope of the present application.

Claims

1. A molten salt electrolysis collection system, located in a transfer area defined between a first electrolytic furnace and a second electrolytic furnace disposed adjacent to each other, characterized in that: include: A crucible extraction device and a discharge molding device, wherein the crucible extraction device includes a base assembly, a Z-axis rotation module arranged on the base assembly, a Z-axis lifting module arranged on the action end of the Z-axis rotation module, and a linear transfer module arranged on the action end of the Z-axis lifting module, a clamping assembly is provided on the action end of the linear drive module; the clamping assembly includes a plurality of clamping units; the clamping unit includes a clamping arm for performing grasping and releasing actions, wherein a card slot is provided at the end of the clamping end on the side facing the crucible, and a horizontally arranged support surface and an S-shaped guide surface at the top are provided at the bottom of the card slot.

2. A molten salt electrolysis collection system according to claim 1, characterized in that: The discharging and molding device is provided with a crucible discharging assembly and a molding receiving assembly for positioning the crucible. The crucible discharging assembly is located in the transfer path of the clamping assembly, and the crucible discharging assembly receives the crucibles from the first electrolytic furnace and the second electrolytic furnace and transfers them to the molding receiving assembly.

3. The molten salt electrolysis collection system according to claim 1, characterized in that: A fastening detection plate is installed on the outside of the card slot, and the fastening detection plate includes a plate body, a sealed cavity is provided in the plate body, an opening is provided on the top of the plate body, and a fastening column adapted to the opening is installed in the opening; the cavity is filled with liquid, the inner shell is made of elastic metal material, and the plate body includes an outer shell and an inner shell.

4. A molten salt electrolysis collection system according to claim 3, characterized in that: The fastening detection plate is arc-shaped. When the clamping arms of the multiple clamping units are combined and pressed against the crucible, the fastening detection plates on the multiple clamping arms are combined into a complete circle.

5. A molten salt electrolysis collection system according to claim 4, characterized in that: A telescopic cylinder is installed in the cavity, and the telescopic cylinder includes an outer cylinder and an inner cylinder inserted into the outer cylinder. A temperature sensor is provided in the outer cylinder, and an elastic telescopic part made of memory metal material is provided at the bottom of the inner cylinder. The movable end of the telescopic elastic part is connected to the temperature sensor installed at the bottom end of the outer cylinder.

6. A molten salt electrolysis collection system according to claim 5, characterized in that: The top of the plate is also covered with ceramic fiber fabric; the inner shell and the heat-insulating and heat-resistant flexible material are both provided with perforations for the inner cylinder to pass through, and a ceramic heat-conducting plate is fixed at the end of the perforation of the heat-insulating and heat-resistant flexible material.

7. A molten salt electrolysis collection system according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that: The two ends of the clamping arm are respectively a driving end and a clamping end, and the driving end and the clamping end move in opposite directions.

8. A molten salt electrolysis collection system according to claim 7, characterized in that: The clamping assembly further comprises a driving assembly and an articulated seat. The driving assembly is arranged at the driving end of the clamping arm to drive the driving end, and the articulated seat is arranged on the inner side of the plurality of clamping arms.

9. A molten salt electrolysis collection system according to claim 8, characterized in that: The clamping arm is provided with a hinged end connected to the hinged seat so that the driving end and the clamping end can rotate around the hinged end; the driving assembly includes a three-jaw chuck and a control unit driven by a servo motor, the driving end of the clamping arm is connected to the movable jaw of the three-jaw chuck, and as the movable jaw moves radially along the chuck body of the three-jaw chuck, the clamping end is switched between the grasping position and the open position, a dustproof disk is provided on the outside of the driving assembly, the three-jaw chuck is provided in the dustproof disk, and a transmission rod is provided in the dustproof disk along the radial direction, a displacement sensor is installed on the outside of the three-jaw chuck for detecting the movement length of the transmission rod, and the control unit is used to detect the torque output percentage of the servo motor and receive the movement length signal of the transmission rod transmitted by the displacement sensor.

10. A control method for a molten salt electrolysis collection system, characterized in that: The molten salt electrolysis collection system is the molten salt electrolysis collection system according to claim 9, comprising the following steps: When the transmission rod moves radially along the dustproof disc, the driving end is displaced horizontally. Since the hinged end in the middle of the clamping arm is fixed in the horizontal direction, the driving end rotates relative to the transmission rod, and the clamping end moves inward. That is, the multiple clamping ends are brought together to clamp the molybdenum pot in the electrolytic cell. When L t =L0,S t =S0, it is determined that the clamping is successful; when L t =L0,S t > S0, it is determined that the clamping fails, and the system increases the servo torque output until L t <L max , S t =S0, determine that the clamping is successful, if L t =L max , S t > S0, it is determined that the clamping fails, the equipment is reset, and manual intervention is required. Once S t <S0, the equipment is operating normally. After the operation is completed, the clamping jaw is judged to be deformed, an alarm is given, and manual intervention is required; 3) When releasing, the servo motor is in position mode and monitors the torque output percentage; when S t =S0,L t <L max , the clamping is judged to be successful; when S t =S0,L t >L max , determine that the bottom furnace ore is abnormal, the clamping claw is deformed, and the equipment is operating normally, an alarm is issued, and manual intervention is required.

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