Seed crystal lifting device

Abstract

The invention belongs to the technical field of seed crystal lifting, and particularly relates to a seed crystal lifting device which comprises a base plate, a seed crystal lifting mechanism is arranged on the base plate, magnetic fluid is arranged below the base plate, two groups of guide wheels are symmetrically and rotatably mounted in an upper port of the magnetic fluid, the seed crystal lifting mechanism comprises a shell, and the shell is fixedly mounted on the base plate. The driving roller is rotationally mounted in the shell and is driven by a power mechanism, the winding roller is movably arranged on the driving roller in a sleeving manner, a spiral groove for winding a seed crystal rope is formed in the outer ring of the winding roller, and the upper end of the seed crystal rope penetrates through the two groups of guide wheels and is fixedly connected with the end part of the spiral groove; in the process of winding the seed crystal rope by the winding roller, the seed crystal rope is uniformly wound on the winding roller under the guidance of the spiral groove, so that the seed crystal rope is prevented from being wound on the same area of the winding roller, the abrasion caused by the winding of the seed crystal rope is reduced, and the service life of the seed crystal rope is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of seed crystal lifting, in particular to a seed crystal lifting device. Background Art

[0002] Seed crystal lifting devices are usually used in crystal growth processes. The main function of the seed crystal lifting device is to accurately control the vertical lifting and lowering of the seed crystal during the crystal growth process to control the stability of the melt-seed crystal interface and the crystal growth rate.

[0003] The patent with publication number CN213925124U discloses a non-biased-load seed crystal lifting device, including a seed crystal lifting chamber, a wire winding shaft, and a guide wheel. The wire winding shaft and the guide wheel are both rotatably installed in the seed crystal lifting chamber, and the guide wheel is located directly below the wire winding shaft. The wire winding shaft is used to wind the seed crystal rope, and the guide wheel is used to set the wire winding shaft at the rotation center position. The wire winding shaft is driven by a power mechanism, and the seed crystal lifting chamber is fixed at the center position of the support mechanism. The bottom of the seed crystal lifting chamber is rotated in the horizontal plane by a seed crystal rotating belt. This scheme guides the winding of the seed crystal rope by setting a guide wheel, so that the wire winding shaft can be placed at the rotation center without biased load, thereby improving the structural stability of the device and facilitating the long-term and stable operation of the single crystal furnace.

[0004] In the above scheme, during the process of winding the seed crystal rope, the winding shaft can only rotate and cannot move axially, and the guide wheel fixes the transmission direction of the seed crystal rope, so that the area where the seed crystal rope is wound on the winding shaft is fixed. This not only causes the winding of the seed crystal rope on the winding shaft to be uneven, but also the number of turns of the seed crystal rope wound on the same area of ​​the winding shaft is too many, and the extrusion force and friction force between the seed crystal ropes will continue to increase, thereby increasing the wear of the seed crystal rope and reducing the service life of the seed crystal rope. For this reason, the present invention provides a seed crystal lifting device. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: a seed crystal lifting device described in the present invention comprises a base plate, a seed crystal lifting mechanism is arranged on the base plate, a magnetic fluid is arranged below the base plate, two groups of guide wheels are symmetrically rotatably installed in the upper port of the magnetic fluid, the seed crystal lifting mechanism comprises a shell, the shell is fixedly installed on the base plate, a driving roller rotatably installed in the shell, the driving roller is driven by a power mechanism, a winding roller movably sleeved on the driving roller, a spiral groove for winding a seed crystal rope is arranged on the outer ring of the winding roller, and the upper end of the seed crystal rope passes through the two groups of guide wheels and is fixedly connected to the end of the spiral groove; When the winding roller is winding the seed crystal rope, the seed crystal rope is evenly wound on the winding roller under the guidance of the spiral groove, so as to avoid the seed crystal rope being wound on the same area of ​​the winding roller, reduce the wear caused by the winding of the seed crystal rope, and increase the service life of the seed crystal rope.

[0007] Preferably, the winding roller is built with a guide hole, the driving roller is inserted into the guide hole, four rows of rollers are rotatably installed around the guide hole, and the rollers are rollingly connected to the driving roller; The rolling roller reduces the friction between the winding roller and the driving roller, thereby increasing the service life of the winding roller and the driving roller.

[0008] Preferably, the seed crystal lifting mechanism also includes a counterweight box, which is mounted on the winding roller, and a swivel ring is rotatably mounted on one end of the winding roller, two sets of racks are meshed with gears, and the gears are rotatably mounted in the housing, one end of one set of racks is fixedly connected to the counterweight box, and one end of the other set of racks is fixedly connected to the swivel ring, and four sets of guide pillars are fixedly installed in the housing, and the four sets of guide pillars are slidably connected to the counterweight box; The moving direction of the counterweight box is opposite to that of the winding roller, which will balance the center of gravity deviation caused by the movement of the winding roller, ensure the stability of the device and improve the quality of the product.

[0009] Preferably, a screw sleeve is fixedly installed inside one end of the driving roller, the screw sleeve is threadedly connected to a screw rod, the screw rod is located inside the driving roller, and one end of the screw rod is fixedly connected to a counterweight box; When the driving roller drives the winding roller to wind up the seed crystal rope, the screw sleeve will rotate together with the driving roller. As the screw sleeve rotates, the screw pushes the counterweight box to move in the direction away from the winding roller. Similarly, the counterweight box makes the winding roller move in the opposite direction synchronously through the cooperation of two sets of racks and gears, thereby not only achieving the above-mentioned balance of the center of gravity shift caused by the movement of the winding roller, but also reducing the wear of the seed crystal rope.

[0010] Preferably, the counterweight box includes a counterweight ring, one end of a group of racks is fixedly connected to the counterweight ring, four groups of guide columns are all slidably connected to the counterweight ring, the counterweight ring is sleeved on the counterweight barrel, one end of the screw is fixedly connected to the counterweight barrel, the bolt connected to one end of the counterweight barrel is rotatably embedded in a movable plate installed in one end of the counterweight barrel, the bolt is screwed on the movable plate, one end of the six groups of movable rods are fixedly connected to the outer ring of the movable plate, the other ends of the six groups of movable rods are respectively plugged into six groups of blocks, six groups of rectangular slide grooves are opened at equal angles at one end of the counterweight barrel, the six groups of movable rods are respectively plugged into the six groups of rectangular slide grooves, six groups of avoidance grooves are opened at equal angles on the other end of the counterweight barrel, the six groups of blocks are respectively located in the six groups of avoidance grooves, oblique grooves are opened on both sides of the blocks, a pin is fixedly installed on the other end of the movable rod, and both ends of the pin are respectively located in the two groups of oblique grooves, a rubber pad is fixedly sleeved on one end of the screw, an annular groove for clamping the block is provided on the inner ring of the counterweight ring, and a rubber sheet is attached to the block; When the winding roller reels the seed crystal rope, the counterweight ring slides along the guide column under the drive of the corresponding rack. At the same time, the rebound force of the rubber pad at the end of the driving roller will drive the screw and the counterweight barrel to rotate together, so that the screw cannot move axially and the counterweight barrel cannot move to the outside of the casing, ensuring that the volume of the device remains unchanged, making it easier for the staff to disassemble, assemble and carry the device.

[0011] The beneficial effects of the present invention are as follows: 1. When the winding roller is winding the seed crystal rope, the seed crystal rope is evenly wound on the winding roller under the guidance of the spiral groove, so as to avoid the seed crystal rope being wound on the same area of ​​the winding roller, reduce the wear caused by the winding of the seed crystal rope, and increase the service life of the seed crystal rope.

[0012] 2. When the winding roller moves, the winding roller drives the corresponding rack to move, and the rack moves another set of racks through the gear. The other set of racks drives the counterweight box to move synchronously along the four sets of guide pillars in the direction of the winding roller. Since the moving direction of the counterweight box is opposite to that of the winding roller, it will balance the center of gravity deviation caused by the movement of the winding roller, ensure the stability of the device, and improve the quality of the product; 3. Turn the bolt to move the movable plate back to the counterweight barrel. At the same time, the movable plate drives the six groups of movable rods to move along the corresponding rectangular slide grooves. Then the movable rod drives the pin shaft end to slide along the oblique groove, so that the clamping block moves into the air avoidance groove, and the clamping connection between the clamping block and the annular clamping groove is released, so that the fixation between the counterweight ring and the counterweight barrel is released. Therefore, when the winding roller reels the seed crystal rope, the counterweight ring is driven by the corresponding rack and slides along the guide column. At the same time, the rebound force of the rubber pad at the end of the driving roller drives the screw rod to rotate together with the counterweight barrel, so that the screw rod cannot move axially, and the counterweight barrel cannot move to the outside of the shell, ensuring that the volume of the device remains unchanged, which is convenient for the staff to disassemble and carry the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the structure of the present invention.

[0015] Figure 2 It is a partial cross-sectional schematic diagram of the structure of the present invention.

[0016] Figure 3 It is a schematic diagram of the combination of the driving roller and the winding roller of the present invention.

[0017] Figure 4 It is a cross-sectional schematic diagram of the seed crystal lifting mechanism of the present invention.

[0018] Figure 5 It is a further schematic cross-sectional view of the seed crystal lifting mechanism of the present invention.

[0019] Figure 6 It is a schematic diagram of the combination of the driving roller, winding roller, counterweight box, rack and guide column of the present invention.

[0020] Figure 7 It is a schematic diagram of the cross-section of the counterweight box and the driving roller combination of the present invention.

[0021] Figure 8 It is a schematic diagram of assembling the counterweight box of the present invention.

[0022] Fig. 9 It is a schematic diagram of the combination of the clamping block and the movable rod of the present invention.

[0023] In the figure: 1, base plate; 2, seed crystal lifting mechanism; 3, power mechanism; 4, magnetic fluid; 41, guide wheel; 5, seed crystal rope; 201, shell; 2011, guide column; 202, driving roller; 2021, screw sleeve; 2022, screw; 2023, rubber pad; 203, winding roller; 2031, spiral groove; 2032, guide hole; 2033, roller; 204, counterweight box; 205, screw ring; 206, rack; 207, gear; 2041, counterweight ring; 411, annular groove; 2042, counterweight barrel; 421, rectangular slide; 422, air avoidance groove; 2043, bolt; 2044, movable plate; 2045, movable rod; 451, pin shaft; 2046, block; 461, oblique groove; 462, rubber sheet. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment 1

[0025] like Figures 1 to 3 As shown, a seed crystal lifting device described in an embodiment of the present invention includes a base plate 1, a seed crystal lifting mechanism 2 is arranged on the base plate 1, a magnetic fluid 4 is arranged below the base plate 1, two groups of guide wheels 41 are symmetrically rotatably installed in the upper port of the magnetic fluid 4, the seed crystal lifting mechanism 2 includes a shell 201, the shell 201 is fixedly installed on the base plate 1, a driving roller 202 rotatably installed in the shell 201, the driving roller 202 is driven by a power mechanism 3, and a winding roller 203 is movably mounted on the driving roller 202, and a spiral groove 2031 for winding a seed crystal rope 5 is arranged on the outer ring of the winding roller 203, and the upper end of the seed crystal rope 5 passes through the two groups of guide wheels 41 and is fixedly connected to the end of the spiral groove 2031.

[0026] Specifically, the groove width of the spiral groove 2031 is equal to the diameter of the cross section of the seed crystal rope 5. When the single crystal furnace needs to be pulled, the driving roller 202 is driven to rotate by the power mechanism 3, and the driving roller 202 drives the winding roller 203 to rotate. The rotating winding roller 203 will drag the seed crystal rope 5, so that the seed crystal rope 5 drives the two sets of guide wheels 41 to rotate. At the same time, the seed crystal rope 5 is wound around the winding roller 203 along the spiral groove 2031. Under the friction between the spiral groove 2031 and the seed crystal rope 5, the winding roller 203 is moved along the driving roller 202 toward The power mechanism 3 slides in the direction of rotation, so that the seed crystal rope 5 is evenly wound on the winding roller 203. Conversely, when the device lowers the single crystal furnace, the winding roller 203 moves back along the driving roller 202. Compared with the prior art, during the process of winding the seed crystal rope 5 by the winding roller 203, under the guidance of the spiral groove 2031, the seed crystal rope 5 is evenly wound on the winding roller 203, avoiding the seed crystal rope 5 from being wound on the same area of ​​the winding roller 203, reducing the wear caused by the winding of the seed crystal rope 5, and increasing the service life of the seed crystal rope 5.

[0027] Furthermore, the winding roller 203 has a guide hole 2032 built therein, the driving roller 202 is plugged into the guide hole 2032 , four rows of rollers 2033 are rotatably installed around the guide hole 2032 , and the rollers 2033 are rollingly connected to the driving roller 202 .

[0028] Specifically, when the winding roller 203 moves along the driving roller 202, the roller 2033 in the winding roller 203 will roll against the driving roller 202. The rolling roller 2033 reduces the friction between the winding roller 203 and the driving roller 202, thereby increasing the service life of the winding roller 203 and the driving roller 202.

[0029] like Figure 4 As shown, the seed crystal lifting mechanism 2 also includes a counterweight box 204, which is mounted on the winding roller 203, and a rotating ring 205 is rotatably mounted on one end of the winding roller 203. Two sets of racks 206 are engaged with gears 207, and gears 207 are rotatably installed in the outer shell 201. One end of one set of racks 206 is fixedly connected to the counterweight box 204, and one end of the other set of racks 206 is fixedly connected to the rotating ring 205. Four sets of guide columns 2011 are fixedly installed in the outer shell 201, and the four sets of guide columns 2011 are all slidably connected to the counterweight box 204.

[0030] Specifically, when the winding roller 203 is winding the seed crystal rope 5, the winding roller 203 will move along the driving roller 202 toward the power mechanism 3, causing the center of gravity of the entire device to shift during operation, resulting in reduced stability of the device and reduced product quality. Therefore, when the winding roller 203 moves, the winding roller 203 drives the corresponding rack 206 to move, and the rack 206 moves another set of racks 206 through the gear 207. The other set of racks 206 drives the counterweight box 204 to move synchronously along the four sets of guide columns 2011 in the direction of the winding roller 203. Since the moving direction of the counterweight box 204 is opposite to that of the winding roller 203, it will balance the center of gravity shift caused by the movement of the winding roller 203, ensure the stability of the device, and improve the quality of the product.

[0031] like Figure 5 As shown, a screw sleeve 2021 is fixedly installed in one end of the driving roller 202 , the screw sleeve 2021 is threadedly connected to a screw rod 2022 , the screw rod 2022 is located in the driving roller 202 , and one end of the screw rod 2022 is fixedly connected to a counterweight box 204 .

[0032] Specifically, the pitch of the thread on the screw 2022 is equal to the pitch of the spiral groove 2031. The movement of the winding roller 203 and the counterweight box 204 is achieved through the friction between the spiral groove 2031 and the seed crystal rope 5. Therefore, increasing the movement of the counterweight box 204 will increase the friction between the spiral groove 2031 and the seed crystal rope 5, thereby reducing the service life of the seed crystal rope 5. Therefore, in the process of the driving roller 202 driving the winding roller 203 to wind up the seed crystal rope 5, the screw sleeve 2021 will rotate together with the driving roller 202. As the screw sleeve 2021 rotates, the screw 2022 pushes the counterweight box 204 to move in the direction away from the winding roller 203. Similarly, the counterweight box 204 uses the cooperation of two sets of racks 206 and gears 207 to make the winding roller 203 move synchronously in the opposite direction, thereby not only achieving the above-mentioned balance of the center of gravity offset caused by the movement of the winding roller 203, but also reducing the wear of the seed crystal rope 5. Embodiment 2

[0033] like Figures 6 to 9As shown, compared with Example 1, another embodiment of the present invention is: the counterweight box 204 includes a counterweight ring 2041, one end of a group of racks 206 is fixedly connected to the counterweight ring 2041, four groups of guide pillars 2011 are slidably connected to the counterweight ring 2041, the counterweight ring 2041 is sleeved on the counterweight barrel 2042, one end of the screw rod 2022 is fixedly connected to the counterweight barrel 2042, a bolt 2043 rotatably connected to one end of the counterweight barrel 2042, a movable disk 2044 embedded in one end of the counterweight barrel 2042, the bolt 2043 is screwed to the movable disk 2044, one end of six groups of movable rods 2045 are fixedly connected to the outer ring of the movable disk 2044, and the other end of the six groups of movable rods 2045 are respectively plugged into six groups of blocks 20 46. ​​Six groups of rectangular slide grooves 421 are opened at equal angles at one end of the counterweight barrel 2042, and six groups of movable rods 2045 are respectively inserted into the six groups of rectangular slide grooves 421. Six groups of air avoidance grooves 422 are opened at equal angles on the other end of the counterweight barrel 2042. Six groups of clamping blocks 2046 are respectively located in the six groups of air avoidance grooves 422. Oblique grooves 461 are opened on both sides of the clamping blocks 2046. A pin shaft 451 is fixedly installed on the other end of the movable rod 2045, and both ends of the pin shaft 451 are respectively located in the two groups of oblique grooves 461. A rubber pad 2023 is fixedly sleeved on one end of the screw rod 2022. An annular clamping groove 411 for clamping the clamping block 2046 is provided on the inner ring of the counterweight ring 2041, and a rubber sheet 462 is attached to the clamping block 2046.

[0034] Specifically, there is a gap between the inner ring of the counterweight ring 2041 and the outer ring of the counterweight barrel 2042. In the initial state, the seed crystal rope 5 is wound on the winding roller 203, so that most of the counterweight box 204 extends to the outside of the shell 201, which increases the volume of the entire device, which is not conducive to the staff's disassembly and transportation of the device. When the seed crystal rope 5 on the winding roller 203 is completely released, the rubber pad 2023 will be tightly clamped between one end of the screw rod 2022 and the end of the driving roller 202, and the six groups of clamping blocks 2046 are all clamped and squeezed The annular clamping groove 411, when it is necessary to disassemble and assemble the device, turn the bolt 2043 to move the movable disk 2044 away from the counterweight barrel 2042, and at the same time, the movable disk 2044 drives the six groups of movable rods 2045 to move along the corresponding rectangular slide grooves 421. Then the movable rod 2045 drives the end of the pin shaft 451 to slide along the oblique groove 461, so that the block 2046 moves into the air avoidance groove 422, and the engagement between the block 2046 and the annular groove 411 is released, so that the fixation between the counterweight ring 2041 and the counterweight barrel 2042 is released. Therefore, when the winding roller 203 winds up the seed crystal rope 5, the counterweight ring 2041 is driven by the corresponding rack 206, and the counterweight ring 2041 slides along the guide column 2011. At the same time, the rebound force of the rubber pad 2023 at the end of the driving roller 202 will drive the screw 2022 to rotate together with the counterweight barrel 2042, so that the screw 2022 cannot move axially, and the counterweight barrel 2042 will not be able to move to the outside of the outer shell 201, ensuring that the volume of the device remains unchanged, which is convenient for the staff to disassemble and transport the device.

[0035] Working principle: The driving roller 202 is driven to rotate by the power mechanism 3, and the driving roller 202 drives the winding roller 203 to rotate. The rotating winding roller 203 will drag the seed crystal rope 5, so that the seed crystal rope 5 drives the two sets of guide wheels 41 to rotate. At the same time, the seed crystal rope 5 is wound around the winding roller 203 along the spiral groove 2031. Under the friction between the spiral groove 2031 and the seed crystal rope 5, the winding roller 203 slides along the driving roller 202 toward the power mechanism 3, so that the seed crystal rope 5 is evenly wound around the winding roller 203. On the contrary, when the device lowers the single crystal furnace, the winding roller 203 moves back along the driving roller 202. When the winding roller 203 moves, the winding roller 203 drives the corresponding rack 206 to move, and the rack 206 moves another set of racks 206 through the gear 207, and the other set of racks 206 drives the counterweight box 204 to move synchronously along the four sets of guide pillars 2011 in the direction of the winding roller 203. Since the moving direction of the counterweight box 204 is opposite to that of the winding roller 203, it will balance the center of gravity deviation caused by the movement of the winding roller 203; When the driving roller 202 drives the winding roller 203 to wind up the seed crystal rope 5, the screw sleeve 2021 will rotate together with the driving roller 202. As the screw sleeve 2021 rotates, the screw rod 2022 pushes the counterweight box 204 to move in the direction of the winding roller 203. Similarly, the counterweight box 204 makes the winding roller 203 move in the opposite direction synchronously through the cooperation of the two sets of racks 206 and the gear 207, so as to achieve the above-mentioned balance of the center of gravity shift caused by the movement of the winding roller 203. When the device needs to be disassembled, the bolt 2043 is turned to move the movable plate 2044 away from the counterweight barrel 2042. At the same time, the movable plate 2044 drives the six groups of movable rods 2045 to move along the corresponding rectangular slide grooves 421. Then the movable rods 2045 drive the ends of the pin shafts 451 to slide along the oblique grooves 461, so that the clamping block 2046 moves into the avoidance groove 422, and the clamping connection between the clamping block 2046 and the annular clamping groove 411 is released, so that the counterweight ring 2041 and the counterweight ring 2041 are connected. The fixation between the counterweight barrels 2042 is released, so when the winding roller 203 winds up the seed crystal rope 5, the counterweight ring 2041 is driven by the corresponding rack 206 to slide along the guide column 2011. At the same time, the rebound force of the rubber pad 2023 at the end of the driving roller 202 will drive the screw 2022 to rotate together with the counterweight barrel 2042, so that the screw 2022 cannot move axially, and the counterweight barrel 2042 will not be able to move to the outside of the outer shell 201.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A seed crystal lifting device, comprising a base plate (1), characterized in that: A seed crystal lifting mechanism (2) is arranged on the base plate (1), a magnetic fluid (4) is arranged below the base plate (1), and two groups of guide wheels (41) are symmetrically rotatably mounted in an upper port of the magnetic fluid (4); The seed crystal lifting mechanism (2) comprises: A housing (201), the housing (201) being fixedly mounted on the base plate (1); Rotating a driving roller (202) installed in the housing (201), wherein the driving roller (202) is driven by a power mechanism (3); A winding roller (203) is movably mounted on the driving roller (202), and a spiral groove (2031) for winding a seed crystal rope (5) is provided on the outer ring of the winding roller (203), and the upper end of the seed crystal rope (5) passes through two sets of guide wheels (41) and is fixedly connected to the end of the spiral groove (2031).

2. A seed crystal lifting device according to claim 1, characterized in that: The winding roller (203) is provided with a guide hole (2032) therein, the driving roller (202) is plugged into the guide hole (2032), four rows of rollers (2033) are rotatably mounted around the guide hole (2032), and the rollers (2033) are rollingly connected to the driving roller (202).

3. A seed crystal lifting device according to claim 2, characterized in that: The seed crystal lifting mechanism (2) further comprises: A counterweight box (204), wherein the counterweight box (204) is sleeved on the winding roller (203); A rotating ring (205), the rotating ring (205) being rotatably mounted on one end of the winding roller (203); Two sets of racks (206), both sets of racks (206) are meshed with a gear (207), and the gear (207) is rotatably mounted in the housing (201).

4. A seed crystal lifting device according to claim 3, characterized in that: One end of one group of the racks (206) is fixedly connected to the counterweight box (204), and one end of another group of the racks (206) is fixedly connected to the screw-on ring (205).

5. A seed crystal lifting device according to claim 4, characterized in that: Four groups of guide pillars (2011) are fixedly installed in the housing (201), and the four groups of guide pillars (2011) are all slidably connected to the counterweight box (204).

6. A seed crystal lifting device according to claim 5, characterized in that: A screw sleeve (221) is fixedly installed inside one end of the driving roller (202); The screw sleeve (2021) is threadedly connected to a screw rod (2022); the screw rod (2022) is located inside the driving roller (202); and one end of the screw rod (2022) is fixedly connected to the counterweight box (204).

7. A seed crystal lifting device according to claim 6, characterized in that: The weight box (204) comprises: A counterweight ring (2041), one end of a group of racks (206) being fixedly connected to the counterweight ring (2041), and four groups of guide pillars (211) being slidably connected to the counterweight ring (2041); The counterweight ring (2041) is sleeved on the counterweight barrel (2042), and one end of the screw rod (2022) is fixedly connected to the counterweight barrel (2042); Rotating a bolt (2043) connected to one end of the counterweight barrel (2042); A movable plate (2044) is embedded in one end of the counterweight barrel (2042), and the bolt (2043) is screwed to the movable plate (2044); Six groups of movable rods (2045), one end of each of the six groups of movable rods (2045) being fixedly connected to the outer ring of the movable disk (2044); The other ends of the six groups of movable rods (2045) are respectively plugged into six groups of clamping blocks (2046).

8. A seed crystal lifting device according to claim 7, characterized in that: Six groups of rectangular slide grooves (421) are formed at equal angles at one end of the counterweight barrel (2042), and the six groups of movable rods (2045) are respectively inserted into the six groups of rectangular slide grooves (421). Six groups of avoidance grooves (422) are formed at equal angles at the other end of the counterweight barrel (2042), and the six groups of clamping blocks (2046) are respectively located in the six groups of avoidance grooves (422).

9. A seed crystal lifting device according to claim 8, characterized in that: Oblique grooves (461) are provided on both sides of the clamping block (2046), a pin shaft (451) is fixedly mounted on the other end of the movable rod (2045), and both ends of the pin shaft (451) are respectively located in two groups of oblique grooves (461).

10. A seed crystal lifting device according to claim 9, characterized in that: A rubber pad (2023) is fixedly sleeved on one end of the screw rod (2022), an annular clamping groove (411) for clamping a clamping block (2046) is provided on the inner ring of the counterweight ring (2041), and a rubber sheet (462) is attached to the clamping block (2046).

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