Crucible transfer equipment

Abstract

The utility model provides a crucible transferring device which comprises a material tray, a material conveying device and a material conveying device. The mechanical claw comprises a supporting part and claw parts, the supporting part is arranged above the material disc, the supporting part is provided with at least three claw parts, the at least three claw parts are arranged around the supporting part at intervals, the upper ends of the claw parts are connected with the supporting part through parallelogram mechanisms, and the lower ends of the claw parts are provided with limiting plates extending in the direction close to the axis of the supporting part; and at least part of the limiting plate extends below the tray. Through the arrangement, an operator only needs to place a crucible on the charging tray and operate the claw part of the mechanical claw to be connected with the charging tray and disconnected from the charging tray, on one hand, the labor intensity of the operator can be reduced, and on the other hand, the claw part of the mechanical claw cannot be in direct contact with the crucible, so that the crucible can be prevented from being damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field related to the production of photovoltaic materials, and relates to a device for preparing devices used for preparing photovoltaic materials, and specifically relates to a crucible transfer device. Background Art

[0002] The Czochralski (CZ) method, currently widely used in the production of single crystal silicon, involves pulling a single crystal vertically from a melt. The manufacturing equipment includes a quartz crucible for holding the silicon material and a supporting crucible for supporting the quartz crucible. The supporting crucible, typically consisting of graphite crucibles and carbon / carbon crucibles, is a key component of the single crystal furnace's thermal field system.

[0003] In the process of using and manufacturing quartz crucibles and carrier crucibles, it is inevitable to involve the handling and transfer of the crucibles. In the process of transferring the crucibles, manual handling is often required, which places great labor intensity on the operators.

[0004] Especially in the process of manufacturing the supporting crucible, the supporting crucible needs to be placed in a purification furnace for purification, and manual handling will further increase the labor intensity of the workers.

[0005] Therefore, designing a crucible transfer device that can reduce the labor intensity of transferring the crucible has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] The utility model provides a crucible transfer device which carries and transfers the crucible by means of mechanical claws and a material tray, thereby solving the problem of high labor intensity caused by manual handling of the crucible in the prior art.

[0007] On the other hand, when the crucible is transferred, the crucible wall will not be scratched by the device.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A crucible transfer device includes: a material tray for carrying a crucible; a mechanical claw, including a support part and a claw part, the support part is arranged above the material tray, at least three claw parts are provided on the support part, and the at least three claw parts are arranged at intervals around the support part, the upper end of the claw part is connected to the support part through a parallelogram mechanism, and the lower end of the claw part is provided with a limit plate extending in a direction close to the axis of the support part, and the limit plate at least partially extends to below the material tray.

[0010] Furthermore, the material tray is disc-shaped, and the heights of the limiting plates of each claw portion are the same.

[0011] Furthermore, a connection portion for connecting to a crane is coaxially provided on the top of the support portion, and the claws are evenly arranged around the support portion, and the distance between each claw and the axis of the support portion is the same.

[0012] Furthermore, the supporting portion includes a central column extending in a vertical direction, and ribs arranged on the outer peripheral wall of the central column and corresponding to each claw portion. The length direction of the ribs extends along the radial direction of the central column, and the width direction of the ribs extends along the axial direction of the central column; the claws are respectively connected to the end of each rib away from the central column.

[0013] Furthermore, the parallelogram mechanism includes at least two connecting rods arranged in the vertical direction, parallel to each other and of equal length between the upper end of each claw and each rib. The two ends of each connecting rod are respectively hinged to the claw and the rib, and the hinge axes between the connecting rod and the claw and the rib are perpendicular to the axis of the support part.

[0014] Furthermore, a first mounting groove is provided at one end of the connecting rod connected to the rib plate, and the first mounting groove is sleeved on the end of the rib plate away from the center column. The connecting rod and the rib plate are connected by a groove wall passing through the first mounting groove and the first hinge axis of the rib plate; a hinge seat is provided at the upper end of the claw portion, and a second mounting groove is provided on the hinge seat. The groove wall of the second mounting groove extends toward the center column, and the end of the connecting rod away from the rib plate at least partially extends into the second mounting groove, and the connecting rod and the hinge seat are connected by the groove wall passing through the second mounting groove and the second hinge axis of the connecting rod.

[0015] Furthermore, an avoidance groove is provided on the rib plate and below the junction with the connecting rod, and an arc chamfer is provided between the groove wall of the avoidance groove and the end of the rib plate away from the central column.

[0016] Furthermore, the mechanical claws and the tray are matched with each other in a circumferential direction;

[0017] Grooves are provided at the outer edge of the tray, and the plurality of grooves correspond to the claws one by one, and the claws are at least partially embedded in the corresponding grooves.

[0018] Furthermore, a plurality of limiting rods extending in the vertical direction and arranged at intervals around the circumference of the tray are provided on the top of the tray near the edge; the area on the tray located inside the plurality of limiting rods constitutes an area for placing the crucible.

[0019] Furthermore, a plurality of ventilation holes are provided in the area on the material tray for placing the crucible.

[0020] Furthermore, the claw portion is configured with: a first position in which the projection of the limit plate in the vertical direction at least partially falls into the material tray, and a second position in which the projection of the limit plate in the vertical direction falls outside the material tray;

[0021] At the first position, the projection of the claw in the vertical direction falls outside the material tray; along the direction close to the axis of the support part, the bottom of the limit plate extends upward, and the angle between the bottom of the limit plate and the horizontal direction is greater than or equal to 45°.

[0022] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art.

[0023] The utility model supports the crucible by arranging a material tray, and carries the material tray carrying the crucible by means of a mechanical claw, so that the operator only needs to place the crucible on the material tray and operate the claw of the mechanical claw to switch between the first position and the second position. On the one hand, the labor intensity of the operator can be reduced, and on the other hand, the mechanical claw will not directly contact the crucible, which can avoid damage to the crucible.

[0024] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of the crucible transfer device in an embodiment of the present utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the mechanical claw in the embodiment of the present utility model;

[0028] Figure 3 It is a structural schematic diagram of the material tray in the embodiment of the present utility model.

[0029] Description of the main components in the figure: 1. Mechanical claw; 11. Support part; 110. Center column; 111. Rib plate; 112. Rib; 113. Avoidance groove; 114. Connecting part; 12. Claw; 121. Limiting plate; 13. Connecting rod; 2. Material tray; 21. Groove; 22. Limiting rod; 23. Vent.

[0030] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0033] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0034] like Figures 1 to 3 As shown, in an embodiment of the present invention, a crucible transfer device is introduced, which can carry the crucible and reduce the labor intensity of the operator while ensuring the integrity of the crucible.

[0035] Specifically, the crucible transfer device includes a tray 2 for carrying the crucible, and a mechanical gripper 1 for carrying the tray 2 .

[0036] The mechanical claw 1 includes a support portion 11 and a claw portion 12 mounted on the support portion 11. The support portion 11 is arranged above the material tray 2. The claw portion 12 includes at least three claw portions arranged around the support portion 11. The upper end of the claw portion 12 is connected to the support portion 11 via a parallelogram mechanism. The lower end of the claw portion 12 is provided with a limit plate 121 extending in a direction close to the axis of the support portion 11. The claw portion 12 is configured with: a first position in which the vertical projection of the limit plate 121 at least partially falls within the material tray 2; and a second position in which the vertical projection of the limit plate 121 falls outside the material tray 2.

[0037] When the crucible needs to be transferred, the operator places the crucible on the tray 2, and the mechanical claw 1 first moves to the top of the tray 2 and then descends. Before the mechanical claw 1 descends, or during the descent of the mechanical claw 1, the claw portion 12 of the mechanical claw 1 is moved to the second position, so that the limit plate 121 at the lower end of the claw portion 12 can smoothly move below the tray 2. Then, the claw portion 12 of the mechanical claw 1 is moved to the first position, so that the limit plate 121 at the lower end of the claw portion 12 moves below the tray 2. In this way, when the height of the mechanical claw 1 is raised, the tray 2 carrying the crucible can be lifted, thereby transferring the crucible. In addition, during this process, the mechanical claw 1 will not come into contact with the crucible, which can prevent the mechanical claw 1 from damaging the crucible and ensure the integrity of the crucible.

[0038] like Figure 1 and Figure 2 As shown, in this embodiment, the parallelogram mechanism includes at least two connecting rods 13 arranged in the vertical direction, parallel to each other and of equal length between the upper end of each claw 12 and the support part 11, and the two ends of the connecting rod 13 are respectively hinged to the claw part 12 and the support part 11, and the hinge axes between the connecting rod 13 and the claw part 12 and the support part 11 are perpendicular to the axis of the support part 11.

[0039] When the connecting rod 13 of the parallelogram mechanism rotates downward to the lower limit position, the difference between the horizontal distance between the claw portion 12 and the axis of the support portion 11 and the horizontal distance between the edge of the material tray 2 and the support portion 11 is smaller than the extension length of the limit plate 121 extending in the direction close to the axis of the support portion 11. Thus, when the connecting rod 13 rotates downward to the lower limit position, the projection of the limit plate 121 in the vertical direction at least partially falls into the material tray 2.

[0040] When the connecting rod 13 of the parallelogram mechanism rotates upward to the upper limit position, the horizontal distance between the claw portion 12 and the axis of the support portion 11 is greater than the horizontal distance between the claw portion 12 and the axis of the support portion 11 when the connecting rod 13 of the parallelogram mechanism rotates downward to the lower limit position.

[0041] Preferably, when the connecting rod 13 of the parallelogram mechanism rotates upward to the upper limit position, the difference between the horizontal distance between the claw portion 12 and the axis of the support portion 11 and the horizontal distance between the edge of the material tray 2 and the support portion 11 is greater than the extension length of the limit plate 121 extending in the direction close to the axis of the support portion 11, and the projection of the limit plate 121 in the vertical direction falls outside the material tray 2.

[0042] In this embodiment, when the claw portion 12 moves to the first position, the connecting rod 13 can be rotated to the lower limit position, or it can be rotated to the lower limit position of the connecting rod 13. It is only necessary to ensure that the projection of the limit plate 121 in the vertical direction at least partially falls within the range of the material tray 2. When the claw portion 12 moves to the second position, the connecting rod 13 can be rotated to the upper limit position, or it can be rotated to the upper limit position of the connecting rod 13. It is only necessary to ensure that the projection of the limit plate 121 in the vertical direction falls outside the material tray 2.

[0043] In some preferred embodiments, when the connecting rod 13 of the parallelogram mechanism rotates upward to the upper limit position, the end of the connecting rod 13 away from the support part 11 is flush with the end of the connecting rod 13 close to the support part 11, that is, the connecting rod 13 rotates to a horizontal position, that is, the claw 12 moves to the position with the maximum horizontal distance from the support part 11.

[0044] Thus, when the feeding tray is not within the inner periphery of the claw portion, under the action of the weight of the connecting rod 13 and the claw portion 12, the connecting rod 13 will rotate downward relative to the support portion 11 to the lower limit position. As the claw portion 12 moves downward, the horizontal distance between the claw portion 12 and the support portion 11 will decrease, that is, the claw portion 12 will move toward the axis of the support portion 11. When the feeding tray is within the inner periphery of the claw portion, under the action of the weight of the connecting rod 13 and the claw portion 12, the connecting rod 13 will rotate downward relative to the support portion 11, and the claw portion will move to the first position. When the claw portion moves to the first position, the connecting rod may or may not rotate to the lower limit position. When the claw portion moves to the first position and the connecting rod has not rotated to the lower limit position, the side of the claw portion near the axis of the support portion abuts the outer edge of the feeding tray.

[0045] When the operator pushes the claw 12 upward to rotate the connecting rod 13 upward, and / or when another driving device drives the connecting rod 13 of the parallelogram mechanism to rotate upward, the claw 12 moves upward while the horizontal distance between the claw 12 and the support portion 11 increases, that is, the claw 12 moves in a direction away from the axis of the support portion 11.

[0046] In some possible embodiments, a motor for driving the connecting rod 13 to rotate may be provided at the hinge between the connecting rod 13 and the support portion 11 . The motor drives the connecting rod 13 to rotate and drives the claw portion 12 to switch between the first position and the second position.

[0047] In other possible embodiments, an operator can operate the connecting rod 13 and / or the claw 12 to switch the claw 12 between the first and second positions. That is, when the limit plate 121 needs to be hung on the material tray 2, or when the limit plate 121 needs to be detached from the material tray 2, the operator can push the claw 12 upward to move it to the second position and / or rotate the connecting rod to the upper limit position. When the operator stops applying force to the claw 12, the claw 12 falls and automatically moves to the first position, and / or the connecting rod automatically rotates to the lower limit position.

[0048] In some specific embodiments, the tray 2 is configured as a disk, with a diameter greater than the outer diameter of the crucible it is to carry, and the crucible is placed in the middle of the tray 2. At least when the claws 12 are in the first position, the limit plates 121 of each claw 12 are at the same height. Therefore, when the mechanical claw 1 lifts the tray 2, the tray 2 is in a horizontal state, preventing the tray 2 from tilting and improving safety.

[0049] In some possible embodiments, the limiting plate 121 extends in a horizontal direction along a direction close to the axis of the supporting portion 11 .

[0050] In some preferred embodiments, at the first position, the projection of the claw portion 12 in the vertical direction falls outside the tray 2; along the direction close to the axis of the support portion 11, the bottom of the limiting plate 121 extends upward at an angle, and the angle between the bottom of the limiting plate 121 and the horizontal direction is greater than or equal to 45°.

[0051] Therefore, when the limit plate 121 needs to be hung on the material tray 2, the operator no longer needs to push the claw 12 upward. Instead, the abutment force between the bottom of the limit plate 121 and the edge of the material tray 2 is used to push the claw 12 in the direction away from the axis of the support part 11. The operator only needs to detach the limit plate 121 from the material tray 2 and push the claw 12 upward.

[0052] In this embodiment, after the mechanical claw 1 places the material tray 2 stably, it moves downward a certain distance relative to the material tray 2, so that there is a gap between the limit plate 121 and the material tray 2, providing the claw 12 of the mechanical claw 1 with room to move upward in a direction away from the axis of the support part 11.

[0053] Specifically, when the claw's stopper plate is attached to the bottom of the tray, a certain distance exists between the claw's support portion and the top of the crucible supported on the tray. After securely placing the tray, the claw can continue to move downward, creating a gap between the stopper plate and the tray. This provides enough space for the claw portion 12 of the claw 1 to move upward, away from the axis of the support portion 11, allowing the stopper plate to detach from the bottom of the tray.

[0054] A connection portion 114 for connecting to a crane is coaxially disposed at the top of the support portion 11. Preferably, the claws 12 are evenly arranged around the support portion 11, and at least at a first position, the distances between each claw 12 and the axis of the support portion 11 are the same. This ensures that the center of gravity of the crane lifting the crucible transfer device coincides with the axis of the support portion 11, preventing deflection.

[0055] In some specific embodiments, the support portion 11 includes a central column 110 extending in a vertical direction, and ribs 111 disposed on the outer peripheral wall of the central column 110, corresponding one-to-one to each claw portion 12. The central column 110 is disposed at the center of the support portion 11, with the axis of the central column 110 coinciding with the axis of the support portion 11. At least three ribs 111, corresponding one-to-one to each claw portion 12, are evenly arranged around the axis of the central column 110. The length of each rib 111 extends radially along the central column 110, and the width of each rib 111 extends axially along the central column 110. Each claw portion 12 is connected to one end of each rib 111 away from the central column 110.

[0056] The connecting portion 114 is coaxially arranged on the top of the central column 110. The connecting portion 114 can be specifically set as a lifting ring adapted to the hook of the crane. The lifting ring is vertically arranged, and the axis of the mechanical claw 1 coincides with the diameter of the lifting ring extending in the vertical direction.

[0057] In this embodiment, the parallelogram mechanism includes at least two connecting rods 13 arranged in the vertical direction, parallel to each other and of equal length between the upper end of each claw 12 and each rib 111. The two ends of each connecting rod 13 are respectively hinged to the claw 12 and the rib 111, and the hinge axes between the connecting rod 13 and the claw 12 and the rib 111 are perpendicular to the axis of the support portion 11.

[0058] like Figure 2 As shown, in some specific embodiments, a first mounting groove is provided at one end of the connecting rod 13 connected to the rib plate 111, and the first mounting groove is sleeved on the end of the rib plate 111 away from the center column 110. The connecting rod 13 and the rib plate 111 are connected by a groove wall passing through the first mounting groove and a first hinge axis of the rib plate 111.

[0059] Preferably, a relief groove 113 is provided on the rib 111 below the junction with the connecting rod 13. A circular chamfer is provided between the groove wall of the relief groove 113 and the end of the rib 111 away from the center column 110. The relief groove 113 is provided below and adjacent to the hinged connection between the connecting rod 13 and the rib 111. This allows the connecting rod 13 to rotate downward and into the relief groove 113, thereby increasing the rotation angle of the connecting rod 13. The provision of the circular chamfer prevents the rib 111 from interfering with the rotation of the connecting rod 13, thereby improving the smoothness of the rotation of the connecting rod 13.

[0060] A hinge seat is provided at the upper end of the claw portion 12, and a second mounting groove is provided on the hinge seat. The groove wall of the second mounting groove extends toward the center column 110, and the end of the connecting rod 13 away from the rib 111 at least partially extends into the second mounting groove. The connecting rod 13 and the hinge seat are connected to the second hinge axis of the connecting rod 13 through the groove wall that passes through the second mounting groove.

[0061] Preferably, one end of the connecting rod 13 away from the rib 111 is configured as an arc surface extending around the second hinge axis.

[0062] In some preferred embodiments, the width of the ribs 111 is the same as the length of the central column 110 , and the lengths of the ribs 111 are the same.

[0063] Preferably, the mechanical claw 1 and the tray 2 are fitted with circumferential limiting.

[0064] In some possible embodiments, a plane is set on the outer edge of the tray 2 corresponding to the claw 12. When the mechanical claw 1 grabs the tray 2, the claw 12 moves to the first position and abuts against the plane to achieve circumferential positioning between the tray 2.

[0065] In some possible embodiments, a groove 21 is provided on the outer edge of the tray 2. The groove 21 is recessed toward the axis of the tray 2, with the notch of the groove 21 facing away from the axis of the tray 2. Multiple grooves 21 correspond one-to-one with each claw 12. When the mechanical gripper 1 grasps the tray 2, the mechanical gripper 1 is coaxial with the tray 2, and each claw 12 is aligned with each groove 21. In the first position, the claw 12 is at least partially embedded in the corresponding groove 21.

[0066] In this embodiment, when the mechanical claw 1 grabs the material tray 2, when the claw portion 12 is in the first position, the length of the limit plate 121 extending in the direction close to the axis of the support portion 11 is greater than the horizontal distance between the claw portion 12 and the bottom of the groove 21, that is, when the claw portion 12 is in the first position, in the horizontal direction, the limit plate 121 at least partially extends to the side of the groove 21 close to the axis of the support portion 11.

[0067] Preferably, the material tray 2 is configured to be circular, and the support portion 11 of the mechanical claw 1 includes a central column 110 and three ribs 111 evenly arranged around the central column 110. Each rib 111 is connected to a claw portion 12 extending in the vertical direction at one end away from the central column 110 through two connecting rods 13. A parallelogram mechanism is formed between the upper end of the claw portion 12 and the rib 111, and the parallelogram mechanism extends in the vertical direction.

[0068] Under the action of gravity, the claw portion 12 translates downwardly toward the axis of the support portion 11, reducing the distance between the claw portion 12 and the axis of the support portion 11, thereby grasping the tray 2. Under the action of the operator's pushing force or the abutment force between the limit plate 121 and the edge of the tray 2, the claw portion 12 translates upward relative to the support portion 11, away from the axis of the support portion 11, causing the mechanical claw 1 to open.

[0069] Preferably, when the claw portion 12 moves to the first position, the claw portion 12 abuts against the bottom of the groove 21. That is, when the connecting rod 13 rotates downward to the lower limit position, the distance between the claw portion 12 and the axis of the support portion 11 is less than or equal to the distance between the bottom of the groove 21 and the axis of the support portion 11.

[0070] Preferably, the support portion 11 further includes a rib 112, which is disposed between two adjacent rib plates 111, with both ends of the rib 112 respectively connected to adjacent surfaces of adjacent rib plates 111, for increasing the strength of the support portion 11. The extension direction of the rib 112 is perpendicular to the extension direction of the central column 110.

[0071] A plurality of ribs 112 may be provided between two adjacent ribs 111. The lengths of the ribs 112 may be the same or different, and the ribs 112 provided between the same pair of adjacent ribs 111 are parallel to each other. Preferably, the ribs 112 provided on the support portion 11 are of the same length, and the ends of the ribs 112 are connected to the middle of the ribs 111.

[0072] Preferably, the claw portion 12 is configured as a vertically extending strip plate.

[0073] A plurality of limiting rods 22 extending in the vertical direction and arranged at intervals around the circumference of the tray 2 are provided at the top of the tray 2 near the edge; the area on the tray 2 located inside the plurality of limiting rods 22 constitutes an area for placing a crucible.

[0074] In this embodiment, the distance between the limiting rod 22 and the axis of the tray 2 is less than or equal to the distance between the groove 21 and the axis of the tray 2. The limiting rod 22 is used to prevent the crucible from falling. Furthermore, the provision of the limiting rod 22 can limit the size of the crucible that the tray 2 can hold. The outer diameter of the crucible that the tray 2 can hold is less than or equal to the distance between the limiting rod 22 and the axis of the tray 2.

[0075] Preferably, the distance between the limiting rod 22 and the axis of the tray 2 is less than or equal to the distance between the end of the limiting plate 121 closest to the axis of the support portion 11 and the axis of the support portion 11 when the connecting rod rotates to the lower limit position. Thus, during the raising and lowering of the mechanical claw, the end of the limiting plate 121 closest to the axis of the support portion will never come into contact with the crucible on the tray.

[0076] Preferably, a plurality of ventilation holes 23 are provided in the area of ​​the tray 2 for placing the crucible.

[0077] The material tray 2 is provided with a plurality of ventilation holes 23 of the same or different sizes, and the ventilation holes 23 are arranged regularly or irregularly on the material tray 2 .

[0078] In this embodiment, the crucible transfer device can be used to transport graphite crucibles, carbon / carbon crucibles and quartz crucibles.

[0079] In some specific embodiments, the crucible transfer device is suitable for transporting graphite crucibles and carbon / carbon crucibles, placing graphite crucibles and carbon / carbon crucibles into a purification furnace, or taking graphite crucibles and carbon / carbon crucibles out of a purification furnace.

[0080] In this embodiment, the material tray 2 is placed in the purification furnace together with the crucible. The material tray 2 constitutes a base for supporting the crucible. By providing air vents 23 on the material tray 2, air flow can be facilitated to pass through, thereby improving the purification efficiency of the purification furnace for the crucible.

[0081] For example, the furnace opening of the purification furnace is generally set at the top of the purification furnace. When the crucible needs to be placed in the purification furnace, the crucible can be placed on the material tray first, and then the material tray is lifted by the mechanical claw, and the material tray carrying the crucible is placed into the purification furnace from the furnace opening of the purification furnace; after the material tray is placed stably, the mechanical claw continues to descend, so that a gap is generated between the limit plate 121 and the material tray 2, providing the claw portion 12 of the mechanical claw 1 with a margin for moving upward in the direction away from the axis of the support portion 11, and then the operator can manually pull the claw portion of the mechanical claw upward to separate the limit plate from the bottom of the material tray and remove the mechanical claw from the purification furnace. When the crucible needs to be taken out of the purification furnace, the mechanical claw is placed into the purification furnace from the furnace opening of the purification furnace, the material tray is grabbed, and the material tray carrying the crucible is lifted out by the mechanical claw.

[0082] In some optional embodiments, the length of the claw of the mechanical claw can be set to be greater than the height of the furnace chamber of the purification furnace. After the mechanical claw enters the purification furnace, the operator can operate from the top of the claw to make the limit plate of the mechanical claw detach from the bottom of the material tray; a traction structure for the operator to pull the claw can also be set on the claw to facilitate the operator to operate the mechanical claw.

[0083] In some optional embodiments, a mechanical claw can be set to place the tray at a preset angle, so that when the tray is taken out of the purification furnace, the claw can be quickly aligned with the groove on the tray.

[0084] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments with equivalent changes using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A crucible transfer device, characterized in that: include: A material tray (2) for carrying the crucible; A mechanical claw (1) comprises a support portion (11) and a claw portion (12), wherein the support portion (11) is arranged above a material tray (2), at least three claw portions (12) are arranged on the support portion (11), and the at least three claw portions (12) are arranged at intervals around the support portion (11), the upper end of the claw portion (12) is connected to the support portion (11) through a parallelogram mechanism, and the lower end of the claw portion (12) is provided with a limiting plate (121) extending in a direction close to the axis of the support portion (11), and the limiting plate (121) at least partially extends to below the material tray (2).

2. The crucible transfer device according to claim 1, characterized in that The material tray (2) is disc-shaped, and the limiting plates (121) of each claw portion (12) have the same height.

3. The crucible transfer device according to claim 2, characterized in that: A connecting portion (114) for connecting to a crane is coaxially arranged on the top of the support portion (11), and the claw portions (12) are evenly arranged around the support portion (11), with the distance between each claw portion (12) and the axis of the support portion (11) being the same.

4. The crucible transfer device according to any one of claims 1 to 3, characterized in that: The support portion (11) includes a central column (110) extending in a vertical direction, and ribs (111) provided on the outer peripheral wall of the central column (110) and corresponding to each claw portion (12). The length direction of the ribs (111) extends along the radial direction of the central column (110), and the width direction of the ribs (111) extends along the axial direction of the central column (110). The claws (12) are respectively connected to one end of each rib (111) away from the central column (110).

5. The crucible transfer device according to claim 4, characterized in that: The parallelogram mechanism comprises at least two connecting rods (13) arranged in a vertical direction, parallel to each other and of equal length, between the upper end of each claw portion (12) and each rib plate (111); the two ends of each connecting rod (13) are respectively hinged to the claw portion (12) and the rib plate (111); and the hinge axes between the connecting rod (13) and the claw portion (12) and the rib plate (111) are perpendicular to the axis of the support portion (11).

6. The crucible transfer device according to claim 5, characterized in that: One end of the connecting rod (13) connected to the rib plate (111) is provided with a first mounting groove, the first mounting groove is sleeved on the end of the rib plate (111) away from the center column (110), and the connecting rod (13) and the rib plate (111) are connected via a groove wall penetrating the first mounting groove and a first hinge shaft of the rib plate (111); A hinge seat is provided at the upper end of the claw portion (12), and a second mounting groove is provided on the hinge seat. The groove wall of the second mounting groove extends in a direction close to the center column (110), and one end of the connecting rod (13) away from the rib plate (111) at least partially extends into the second mounting groove. The connecting rod (13) and the hinge seat are connected through the groove wall that passes through the second mounting groove and the second hinge axis of the connecting rod (13).

7. The crucible transfer device according to any one of claims 1 to 3, characterized in that: The mechanical claw (1) and the material tray (2) are engaged in a circumferential limiting manner.

8. The crucible transfer device according to any one of claims 1 to 3, characterized in that: A plurality of limiting rods (22) extending in a vertical direction and arranged at intervals around the circumference of the material tray (2) are provided at the top of the material tray (2) and near the edge; an area on the material tray (2) located within the inner periphery of the plurality of limiting rods (22) constitutes an area for placing a crucible.

9. The crucible transfer device according to claim 8, characterized in that: A plurality of ventilation holes (23) are provided in the area on the material tray (2) for placing the crucible.

10. The crucible transfer device according to any one of claims 1 to 3, characterized in that: The claw portion (12) is configured with: a first position in which the projection of the limiting plate (121) in the vertical direction at least partially falls into the material tray (2); and a second position in which the projection of the limiting plate (121) in the vertical direction falls outside the material tray (2); At the first position, the projection of the claw portion (12) in the vertical direction falls outside the material tray (2); along the direction close to the axis of the support portion (11), the bottom of the limiting plate (121) extends upwardly and the angle between the bottom of the limiting plate (121) and the horizontal direction is greater than or equal to 45°.

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