Crucible handling fixture

Abstract

This application discloses a crucible handling fixture. The crucible has connection holes on both opposite sides, and at least one side has an anti-rotation groove communicating with the connection hole. The fixture includes a connecting assembly and a clamping member. The connecting assembly has two connecting parts, each rotatably connected to the connection holes on opposite sides of the crucible. The clamping member is movably connected to the connecting assembly and can be inserted into the anti-rotation groove during its movement, thus fixing the connecting assembly relative to the crucible when inserted. Since the two connecting parts of the connecting assembly are rotatably connected to the connection holes on opposite sides of the crucible, the operator can directly lift the crucible through the connecting assembly to move it. This handling fixture can be applied to crucibles with large volume and weight, and is relatively inexpensive. Furthermore, during handling, inserting the clamping member into the anti-rotation groove to fix the connecting assembly relative to the crucible prevents the crucible from shaking or swaying significantly during handling, improving handling safety.

Description

Technical Field

[0001] This application belongs to the field of crucible handling technology, specifically relating to a crucible handling fixture. Background Technology

[0002] In the laboratory, operators typically need to use tools to move crucibles, such as transporting them from the reaction site to the testing site. For smaller crucibles, crucible tongs are usually used directly. However, for larger crucibles, using crucible tongs is more inconvenient. Currently, in industrial production, larger crucibles can be moved using trolleys and grippers. However, in the laboratory, space is limited, making it inconvenient to install trolleys and grippers, and these are also expensive. Utility Model Content

[0003] Therefore, it is necessary to provide crucible handling fixtures that can be applied to the handling of large and heavy crucibles in the laboratory at a low cost.

[0004] The technical solution proposed in this application is as follows: A crucible handling fixture, wherein connecting holes are provided on both opposite sides of the crucible, and at least one side is provided with an anti-rotation groove communicating with the connecting holes; the crucible handling fixture includes: The connecting assembly has two connecting parts, each of which is rotatably connected to connecting holes on opposite sides of the crucible; A retaining element is movably connected to the connecting assembly, and the retaining element can be inserted into the anti-rotation groove during its movement to fix the connecting assembly relative to the crucible when inserted into the anti-rotation groove.

[0005] Using the aforementioned crucible handling fixture, the two connecting parts of the connecting assembly are rotatably connected to the connecting holes on opposite sides of the crucible. Operators can directly lift the crucible through the connecting assembly to move it. This handling fixture can be applied to crucibles with large volume and weight, and it is more cost-effective than handling carts and grippers. Furthermore, during handling, the clamping element is inserted into the anti-rotation groove to fix the connecting assembly relative to the crucible, preventing the crucible from shaking or swaying significantly during handling, thus improving handling safety.

[0006] Furthermore, the connecting assembly includes a first connector and a second connector, the first connector and the second connector are connected to each other, the ends of the first connector and the second connector that are far apart from each other are rotatably connected to the corresponding connecting holes, and both the first connector and the second connector are separable from the crucible; the first connector and the second connector can adjust their positions to adjust the distance between the two connecting parts; The retaining member is movably connected to the first connector and / or the second connector.

[0007] Furthermore, one end of the first connector has a blind hole, and one end of the second connector extends into the blind hole and can move along the axial direction of the blind hole; The connecting assembly further includes a locking member. The side of the first connecting member is provided with a locking hole that communicates with the blind hole. The locking member is threadedly connected to the locking hole, and one end of the locking member can extend into the blind hole and abut against the second connecting member.

[0008] Furthermore, the first connecting member includes a horizontal bar and a vertical bar. One end of the horizontal bar is connected to the second connecting member. The vertical bar is connected to the end of the horizontal bar away from the second connecting member. The end of the vertical bar away from the horizontal bar is rotatably connected to the connecting hole. The retaining member is movably connected to the vertical bar.

[0009] Furthermore, the vertical rod has a movable channel along its length, and the side of the vertical rod has a first movable hole and a second movable hole that communicate with the movable channel. The second movable hole is located at the end of the vertical rod away from the horizontal rod. The retaining member includes a rod body and an adjusting part and a retaining part connected to the side wall of the rod body and set at an angle to the rod body. The rod body is slidably disposed in the movable channel. The adjusting part can extend out from the first movable hole, and the retaining part can extend out from the second movable hole. During the movement of the retaining member relative to the vertical rod, the retaining part can be inserted into the anti-rotation groove.

[0010] Furthermore, the first connector also includes a connecting shaft, which is connected to the end of the vertical rod away from the horizontal rod, and the connecting shaft is rotatably connected to the connecting hole; The connecting shaft has a receiving groove that corresponds to and communicates with the second movable hole. During the movement of the clamping member relative to the vertical rod, the clamping part can pass through the anti-rotation position and the rotation position. When the retaining part is in the anti-rotation position, the retaining part is inserted into the anti-rotation groove to fix the connecting shaft relative to the crucible; when the retaining part is in the rotation position, the retaining part is inserted into the receiving groove to allow the connecting shaft to rotate within the connecting hole.

[0011] Furthermore, the connecting assembly also includes a connecting cylinder and an elastic element. The first connecting element and the second connecting element are respectively connected to opposite ends of the connecting cylinder, and at least one of the first connecting element and the second connecting element is movable relative to the connecting element. The elastic element is disposed in the connecting cylinder and connected to the first connecting element and / or the second connecting element to provide a force that brings the first connecting element and the second connecting element closer to each other.

[0012] Furthermore, the connecting cylinder has a connecting channel, and both ends of the connecting cylinder have through holes communicating with the connecting channel, the radial dimension of the through holes being smaller than the radial dimension of the connecting channel; The ends of the first connector and the second connector are movably disposed within the connection channel, and the first connector and the second connector extend out through the two through holes respectively. The elastic element is disposed within the connection channel and is connected to the ends of the first connector and the second connector.

[0013] Furthermore, the anti-rotation groove is located below the connecting hole.

[0014] Furthermore, both the connecting component and the retaining component are made of stainless steel.

[0015] In summary, the crucible handling fixture provided in this application has at least the following advantages: 1. The crucible can be lifted directly through the connecting components, which can be applied to crucibles with large volume and weight. There is no need to set up a handling vehicle and grippers, resulting in lower handling costs. 2. During handling, the clamping parts can be inserted into the anti-rotation groove to fix the connecting components relative to the crucible, preventing the crucible from shaking or shaking significantly during handling and improving handling safety. 3. The first and second connectors are adjustable in position, thereby enabling the connecting assembly to be separated from the crucible and allowing the connecting assembly to be applied to crucibles of different sizes. Attached Figure Description

[0016] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0017] Figure 1 This is a schematic diagram of the crucible handling fixture provided in Embodiment 1 of this application; Figure 2 for Figure 1 The diagram shows the structure of the crucible. Figure 3 for Figure 1A schematic diagram of the structure of the vertical rod and the clamping component in the first connecting part of the crucible handling fixture shown; Figure 4 for Figure 3 The diagram shows the structure of the retaining element; Figure 5 Middle 5-1 and 5-2 are respectively Figure 3 Left and right views of the card holder when it is in the anti-rotation position; Figure 6 Middle 6-1 and 6-2 are respectively Figure 3 Left and right views of the card holder in the rotating position; Figure 7 This is a structural diagram of the first connector and the second connector provided in Embodiment 2 of this application, and the connection position between them.

[0018] Label Explanation: 200, Crucible; 210, Connecting hole; 220, Anti-rotation groove; 110, Connecting assembly; 120, First connecting piece; 121, Horizontal bar; 122, Vertical bar; 1221, First movable hole; 1222, Second movable hole; 123, Connecting shaft; 1231, Receiving groove; 130, Second connecting piece; 140, Locking piece; 150, Holding piece; 151, Rod body; 152, Adjusting part; 153, Holding part; 160, Connecting cylinder; 170, Elastic element. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] This application provides a crucible handling fixture capable of handling large crucibles in the laboratory, such as crucibles with a diameter greater than 15 cm and a weight greater than 1 kg. The crucible material can be graphite, quartz, or cast iron. Further, as... Figure 2 As shown, the crucible 200 has connecting holes 210 on both opposite sides, and at least one side has an anti-rotation groove 220 communicating with the connecting hole 210. It should be noted that laser drilling is preferred for drilling the quartz crucible 200.

[0022] like Figure 1 and Figure 2 As shown, in Embodiment 1, the crucible handling fixture includes a connecting assembly 110 and a retaining member 150. The connecting assembly 110 has two connecting portions, which are rotatably connected to the connecting portions on opposite sides of the crucible 200. The retaining member 150 is movably connected to the connecting assembly 110, and during its movement, the retaining member 150 can be inserted into the anti-rotation groove 220 to fix the connecting assembly 110 relative to the crucible 200, thereby restricting the rotation of the connecting assembly 110.

[0023] Using the aforementioned crucible handling fixture, the two connecting parts of the connecting assembly 110 are rotatably connected to the connecting holes 210 on opposite sides of the crucible 200. Operators can directly lift the crucible 200 through the connecting assembly 110 to move it. This handling fixture can be applied to crucibles 200 that are large in size and weight, and it is less expensive than handling carts and grippers. Furthermore, during handling, the clamping member 150 is inserted into the anti-rotation groove 220 to fix the connecting assembly 110 relative to the crucible 200, preventing the crucible 200 from shaking or swaying significantly during handling, thus improving handling safety.

[0024] Understandably, the fit between the connecting component 110 and the crucible 200 is similar to that of a bucket with a handle mounted on the outside. Therefore, when loading the crucible 200, the connecting component 110 can be rotated to the side of the crucible 200; when unloading the crucible 200, the connecting component 110 can be lifted, and the crucible 200 can be rotated directly. Furthermore, since the crucible 200 may be used in chemical reactions or high-temperature environments, operators can wear asbestos gloves or other safety-enhancing gloves when lifting the crucible 200 using the connecting component 110. Of course, to further improve safety, this handling fixture is preferably used in low-temperature environments, such as the addition reaction of Grignard reagents with benzaldehyde, which requires an ice-water bath, where a quartz crucible 200 can be used; and the dissolution reaction of iron oxide with concentrated hydrochloric acid, which typically occurs in a 50°C warm water bath to accelerate the reaction, where a quartz crucible 200 can also be used.

[0025] It should be explained that for crucibles 200 that are large in volume and weight, if crucible 200 clamps are used for handling, since the working principle of crucible 200 clamps is similar to that of a lever, in order to improve the stability of handling, two people are usually required. One person mainly applies external force to clamp crucible 200 with crucible 200 clamps, and the other person provides auxiliary external force to lift crucible 200. At the same time, the two people also need to cooperate well. Therefore, it is inconvenient to use crucible 200 clamps to handle crucibles 200 that are large in volume and weight. However, the handling fixture in the above embodiment only requires one person to lift it with the connecting component 110. Moreover, during the handling process, the connecting component 110 is fixed relative to crucible 200 by the clamping component 150, which can effectively prevent crucible 200 from shaking or shaking significantly during handling, thus improving the safety of handling. It can be seen that the handling fixture in this embodiment is applied to crucibles 200 that are inconvenient to handle with crucible 200 clamps but can be lifted by one person. Therefore, it is preferred in laboratory scenarios.

[0026] In this embodiment, the connecting assembly 110 includes a first connecting member 120 and a second connecting member 130. The first connecting member 120 and the second connecting member 130 are connected to each other, and the ends of the first connecting member 120 and the second connecting member 130 that are away from each other are rotatably connected to corresponding connecting holes 210. That is, the end of the first connecting member 120 that is away from the second connecting member 130 is rotatably connected to one of the connecting holes 210, and the end of the second connecting member 130 that is away from the first connecting member 120 is rotatably connected to the other connecting hole 210. Thus, the connecting portion is located at the two ends of the first connecting member 120 and the second connecting member 130 that are away from each other.

[0027] Preferably, the first connector 120 and the second connector 130 are adjustable in position to adjust the distance between the two connecting parts. Simultaneously, both the first connector 120 and the second connector 130 are separable from the crucible 200. Thus, the adjustable distance between the two connecting parts allows for both connecting and separating the first connector 120 and the second connector 130 from the crucible 200, and also allows the connecting assembly 110 to connect to crucibles 200 of different sizes.

[0028] It should be noted that in this embodiment, a rotating shaft can be provided at the ends of the first connector 120 and the second connector 130 that are far apart from each other. The rotating shaft is the connecting part mentioned above. The rotating shaft is inserted into the corresponding connecting hole 210, so that the first connector 120 and the second connector 130 are rotatably connected to the crucible 200 and can be separated from each other. At the same time, when it is necessary to disassemble the connecting assembly 110, the first connector 120 and the second connector 130 are pulled apart so that the two connecting parts are far apart from each other, and the rotating shaft inserted into the connecting hole 210 is pulled out.

[0029] Regarding the connection method of the first connector 120 and the second connector 130, in this embodiment, one end of the first connector 120 has a blind hole, and one end of the second connector 130 extends into the blind hole and can move axially along the blind hole. In practical applications, the blind hole extends radially along the crucible 200, thereby allowing the distance between the two connecting parts to be adjusted during the movement of the second connector 130. Furthermore, the connecting assembly 110 also includes a locking member 140. The side of the first connector 120 also has a locking hole communicating with the blind hole. The locking member 140 is threadedly connected to the locking hole, and one end of the locking member 140 can extend into the blind hole and abut against the second connector 130, so that the first connector 120 and the second connector 130 are relatively fixed after the positions of the first connector 120 and the second connector 130 are adjusted. It should be noted that... Figure 1 In the illustrated embodiment, the connecting assembly 110 is in a vertical position, and the locking member 140 is located on top of the first connecting member 120, mainly to facilitate the demonstration of the locking member 140 structure. In practical applications, the locking member 140 can be located on the side of the first connecting member 120 for easy gripping by the operator. Optionally, the locking member 140 is a locking bolt.

[0030] Regarding the specific structures of the first connector 120 and the second connector 130, it should be noted that the structures of the first connector 120 and the second connector 130 are basically the same, with the difference as described above. The first connector 120 has a blind hole at one end and a locking hole on its side, while one end of the second connector 130 can extend into the blind hole. The structure of the first connector 120 will be described below. Those skilled in the art can design the second connector 130 based on the accompanying drawings and the differences between the two, so the structure of the second connector 130 will not be described in detail.

[0031] In this embodiment, the first connecting member 120 includes a horizontal bar 121 and a vertical bar 122. One end of the horizontal bar 121 is connected to the second connecting member 130. As described above, one end of the horizontal bar 121 has a blind hole, one end of the second connecting member 130 extends into the blind hole, and a locking hole is provided on the side of the horizontal bar 121. The locking member 140 is threadedly connected to the locking hole. The vertical bar 122 is connected to the end of the horizontal bar 121 away from the second connecting member 130. The end of the vertical bar 122 away from the horizontal bar 121 is rotatably connected to the connecting hole 210, and the retaining member 150 is movably connected to the vertical bar 122.

[0032] Furthermore, the first connecting member 120 also includes a connecting shaft 123, which is connected to the end of the vertical rod 122 away from the horizontal rod 121. The connecting shaft 123 is rotatably connected to the connecting hole 210, that is, the connecting shaft 123 is inserted into the connecting hole 210, and the connecting shaft 123 can rotate within the connecting hole 210, thereby realizing the rotatable connection and separability of the first connecting member 120 and the connecting hole 210. It can also be determined that the connecting shaft 123 is the aforementioned rotating shaft.

[0033] Please see Figure 3 and Figure 4 Regarding the arrangement of the retaining member 150, in this embodiment, the vertical rod 122 has a movable channel along its length, and the side of the vertical rod 122 has a first movable hole 1221 and a second movable hole 1222 communicating with the movable channel. The second movable hole 1222 is located at the end of the vertical rod 122 away from the horizontal rod 121. The retaining member 150 includes a rod body 151 and an adjusting part 152 and a retaining part 153 connected to the side wall of the rod body 151 and arranged at an angle to the rod body 151. The rod body 151 slides in the movable channel, that is, it is moved back and forth in the movable channel along the axial direction of the vertical rod 122. The adjusting part 152 can extend out from the first movable hole 1221, and the retaining part 153 can extend out from the second movable hole 1222. It can be determined that, along the length of the vertical rod 122, the size of the first movable hole 1221 is larger than the size of the adjusting part 152, and the size of the second movable hole 1222 is larger than the size of the holding part 153, so that the holding member 150 can reciprocate along the length of the vertical rod 122. Preferably, both the first movable hole 1221 and the second movable hole 1222 are strip-shaped holes, and both extend along the length of the vertical rod 122.

[0034] In practical applications, during the movement of the clamping part 150 relative to the vertical rod 122, the clamping part 153 can be inserted into the anti-rotation groove 220, thereby fixing the vertical rod 122 relative to the crucible 200, and then fixing the connecting assembly 110 relative to the crucible 200, thus preventing the crucible 200 from shaking or shaking significantly during transportation.

[0035] Please see Figure 5 and Figure 6 Furthermore, the connecting shaft 123 has a receiving groove 1231 that corresponds to and communicates with the second movable hole 1222. During the movement of the retaining member 150 relative to the vertical rod 122, the retaining member 150 can pass through an anti-rotation position and a rotational position. When the retaining member 150 is in the anti-rotation position, the retaining member 150 is inserted into the anti-rotation groove 220 to fix the connecting shaft 123 relative to the crucible 200; when the retaining member 150 is in the rotational position, the retaining part 153 is inserted into the receiving groove 1231 so that the connecting shaft 123 can rotate within the connecting hole 210.

[0036] Combination Figures 5 to 6 To explain: In Figure 5-1 and 5-2, Figure 5-1 Used to indicate the position of the adjustment part 152 in the card holder 150 Figure 5-2 This is used to indicate the position of the holding part 153 in the holding member 150, at which time the holding member 150 is in the anti-rotation position; in Figure 6-1 and 6-2, Figure 6-1 Used to indicate the position of the adjustment part 152 in the card holder 150 Figure 6-2 This indicates the position of the holding part 153 in the holding member 150, at which time the holding member 150 is in the rotating position. The holding member 150 can move from the anti-rotation position to the rotating position by the operator applying external force to the adjusting part 152, causing the holding member 150 to rise to the rotating position.

[0037] Meanwhile, it can be determined that, in the preferred embodiment, the anti-rotation groove 220 is located below the connecting hole 210, that is, the retaining member 150 descends relative to the vertical rod 122, allowing the retaining part 153 to be inserted into the anti-rotation groove 220. In practical applications, when the connecting assembly 110 is rotated to a vertical position, the retaining member 150 can descend under the action of gravity, causing the retaining part 153 to automatically insert into the anti-rotation groove 220, thus fixing the connecting assembly 110 relative to the crucible 200. When it is necessary to rotate the connecting assembly 110 relative to the crucible 200, an external force is applied to the adjusting part 152, causing the retaining member 150 to rise, and the retaining part 153 to enter the receiving groove 1231. In this way, the convenience of using the handling fixture can be effectively improved.

[0038] Regarding the materials of the handling fixtures, in this embodiment, both the connecting component 110 and the clamping component 150 are made of stainless steel. Additionally, when the crucible 200 is made of a hard and brittle material such as quartz, a heat-resistant silicone pad can be placed at the connecting hole 210 to prevent the connecting component 110 from directly and rigidly contacting the crucible 200, thus improving reliability.

[0039] Please see Figure 7 In embodiment 2, the connecting assembly 110 further includes a connecting cylinder 160 and an elastic element 170. The first connecting element 120 and the second connecting element 130 are respectively connected to opposite ends of the connecting cylinder 160, and at least one of the first connecting element 120 and the second connecting element 130 is movable relative to the connecting element. The elastic element 170 is disposed in the connecting cylinder 160 and connected to the first connecting element 120 and / or the second connecting element 130 to provide a force that brings the first connecting element 120 and the second connecting element 130 closer together. Therefore, the elastic element 170 is a tension spring.

[0040] Furthermore, the connecting cylinder 160 has a connecting channel, and both ends of the connecting cylinder 160 have through holes communicating with the connecting channel. The radial dimension of the through holes is smaller than the radial dimension of the connecting channel. The ends of the first connecting member 120 and the second connecting member 130 are movably disposed within the connecting channel, and the first connecting member 120 and the second connecting member 130 extend out through two through holes respectively. The elastic member 170 is disposed within the connecting channel, and the elastic member 170 is connected to the ends of the first connecting member 120 and the second connecting member 130. Figure 7 It can be determined that the ends of the first connector 120 and the second connector 130 are provided with stepped structures so that the ends of the first connector 120 and the second connector 130 are confined within the connection channel.

[0041] It should be noted that the difference between Embodiment 2 and Embodiment 1 lies in the connection method of the first connector 120 and the second connector 130. Therefore, in this embodiment, the first connector 120 and the second connector 130 can adopt the same structure. Moreover, the number of retaining members 150 can be two, with the two retaining members 150 respectively disposed on the first connector 120 and the second connector 130. For the specific arrangement, please refer to Embodiment 1.

[0042] In summary, the crucible handling fixture provided in this application has at least the following advantages: 1. The crucible 200 can be lifted directly through the connecting component 110, which can be applied to crucibles 200 with large volume and weight, without the need to set up a handling vehicle and grippers, resulting in lower handling costs; 2. During the handling process, the clamping component 150 can be inserted into the anti-rotation groove 220 to fix the connecting component 110 relative to the crucible 200, thereby preventing the crucible 200 from shaking or shaking significantly during handling and improving the safety of handling. 3. The first connector 120 and the second connector 130 can be adjusted in position, so that the connecting assembly 110 can be separated from the crucible 200, and the connecting assembly 110 can be applied to crucibles 200 of different sizes.

Claims

1. A crucible handling fixture, characterized in that, The crucible has connection holes on both sides, and at least one side has an anti-rotation groove communicating with the connection hole. The crucible handling fixture includes: The connecting assembly has two connecting parts, each of which is rotatably connected to connecting holes on opposite sides of the crucible; A retaining element is movably connected to the connecting assembly, and the retaining element can be inserted into the anti-rotation groove during its movement to fix the connecting assembly relative to the crucible when inserted into the anti-rotation groove.

2. The crucible handling fixture according to claim 1, characterized in that, The connecting assembly includes a first connector and a second connector, which are connected to each other. The ends of the first connector and the second connector that are far apart from each other are rotatably connected to the corresponding connecting holes. Both the first connector and the second connector are separable from the crucible. The first connector and the second connector can adjust their positions to adjust the distance between the two connecting parts. The retaining member is movably connected to the first connector and / or the second connector.

3. The crucible handling fixture according to claim 2, characterized in that, One end of the first connector has a blind hole, and one end of the second connector extends into the blind hole and can move along the axial direction of the blind hole; The connecting assembly further includes a locking member. The side of the first connecting member is provided with a locking hole that communicates with the blind hole. The locking member is threadedly connected to the locking hole, and one end of the locking member can extend into the blind hole and abut against the second connecting member.

4. The crucible handling fixture according to claim 2, characterized in that, The first connector includes a horizontal bar and a vertical bar. One end of the horizontal bar is connected to the second connector. The vertical bar is connected to the end of the horizontal bar away from the second connector. The end of the vertical bar away from the horizontal bar is rotatably connected to the connecting hole. The retaining member is movably connected to the vertical bar.

5. The crucible handling fixture according to claim 4, characterized in that, The vertical rod has a movable channel along its length, and the side of the vertical rod has a first movable hole and a second movable hole that communicate with the movable channel. The second movable hole is located at the end of the vertical rod away from the horizontal rod. The retaining member includes a rod body and an adjusting part and a retaining part connected to the side wall of the rod body and set at an angle to the rod body. The rod body is slidably disposed in the movable channel. The adjusting part can extend out from the first movable hole, and the retaining part can extend out from the second movable hole. During the movement of the retaining member relative to the vertical rod, the retaining part can be inserted into the anti-rotation groove.

6. The crucible handling fixture according to claim 5, characterized in that, The first connector further includes a connecting shaft, which is connected to the end of the vertical rod away from the horizontal rod, and the connecting shaft is rotatably connected to the connecting hole; The connecting shaft has a receiving groove that corresponds to and communicates with the second movable hole. During the movement of the clamping member relative to the vertical rod, the clamping part can pass through the anti-rotation position and the rotation position. When the retaining part is in the anti-rotation position, the retaining part is inserted into the anti-rotation groove to fix the connecting shaft relative to the crucible; when the retaining part is in the rotation position, the retaining part is inserted into the receiving groove to allow the connecting shaft to rotate within the connecting hole.

7. The crucible handling fixture according to claim 2, characterized in that, The connecting assembly further includes a connecting cylinder and an elastic element. The first connecting element and the second connecting element are respectively connected to opposite ends of the connecting cylinder, and at least one of the first connecting element and the second connecting element is movable relative to the connecting element. The elastic element is disposed in the connecting cylinder and connected to the first connecting element and / or the second connecting element to provide a force that brings the first connecting element and the second connecting element closer to each other.

8. The crucible handling fixture according to claim 7, characterized in that, The connecting cylinder has a connecting channel, and both ends of the connecting cylinder have through holes communicating with the connecting channel. The radial dimension of the through holes is smaller than the radial dimension of the connecting channel. The ends of the first connector and the second connector are movably disposed within the connection channel, and the first connector and the second connector extend out through the two through holes respectively. The elastic element is disposed within the connection channel and is connected to the ends of the first connector and the second connector.

9. The crucible handling fixture according to claim 1, characterized in that, The anti-rotation groove is located below the connecting hole.

10. The crucible handling fixture according to claim 1, characterized in that, Both the connecting component and the retaining component are made of stainless steel.

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