A seed crystal lifting device

Abstract

The present invention belongs to the technical field of seed crystal lifting, and specifically relates to a seed crystal lifting device, which includes a base plate. A seed crystal lifting mechanism is arranged on the base plate, and a magnetofluid is arranged below the base plate. Two groups of guide wheels are symmetrically and rotatably installed in the upper port of the magnetofluid. The seed crystal lifting mechanism includes a housing, the housing is fixedly installed on the base plate, a driving roller rotatably installed in the housing, the driving roller is driven by a power mechanism, a winding roller movably sleeved on the driving roller, and a spiral groove for winding a seed crystal rope is arranged on the outer ring of the winding roller. 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; during the process of the winding roller winding the seed crystal rope, under the guidance of the spiral groove, the seed crystal rope is evenly wound on the winding roller, avoiding the seed crystal rope from winding in the same area on the winding roller, reducing the wear caused by the winding of the seed crystal rope, and improving the service life of the seed crystal rope.

Description

Technical Field

[0001] The present invention belongs to the technical field of seed crystal lifting, and specifically relates to a seed crystal lifting device. Background Art

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

[0003] The patent with the publication number CN213925124U discloses a non-offset seed crystal lifting device, which includes a seed crystal lifting cavity, 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 cavity. The guide wheel is located directly below the wire winding shaft. The wire winding shaft is used for winding a 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. The seed crystal lifting cavity is fixed at the center position of the support mechanism. The bottom of the seed crystal lifting cavity rotates horizontally through a seed crystal rotating belt. This solution plays a guiding role in winding the seed crystal rope by setting a guide wheel, enabling the wire winding shaft to be placed at the rotation center without offset load, improving the structural stability of the device, and facilitating the long-term stable operation of the single crystal furnace.

[0004] In the above solution, during the process of winding the seed crystal rope around the wire winding shaft, the wire winding shaft can only rotate and cannot move axially, and the direction of the seed crystal rope transmission by the guide wheel is fixed, so that the area where the seed crystal rope is wound around the wire winding shaft is fixed. This not only causes the seed crystal rope to be wound around the wire winding shaft unevenly, but also the number of turns of the seed crystal rope wound in the same area on the wire winding shaft is too large, resulting in continuous increase in the extrusion force and friction force between the seed crystal ropes, increasing the wear of the seed crystal rope and reducing the service life of the seed crystal rope. Therefore, 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 and solve at least one technical problem proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A seed crystal lifting device of the present invention includes a base plate, a seed crystal lifting mechanism is arranged on the base plate, a magnetic fluid is arranged below the base plate, and two groups of guide wheels are symmetrically and rotatably installed in the upper port of the magnetic fluid. The seed crystal lifting mechanism includes a housing fixed to the base plate, a driving roller rotatably installed in the housing, the driving roller is driven by a power mechanism, a winding roller movably sleeved on the driving roller, a spiral groove for winding the 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;

[0007] During the process of the take-up roller winding the seed crystal rope, under the guidance of the spiral groove, the seed crystal rope is evenly wound on the take-up roller, avoiding the seed crystal rope from winding on the same area of the take-up roller, reducing the wear caused by the winding of the seed crystal rope, and improving the service life of the seed crystal rope.

[0008] Preferably, a guiding hole is provided inside the take-up roller, the driving roller is inserted into the guiding hole, and four rows of rollers are rotatably installed around the guiding hole, and the rollers are in rolling connection with the driving roller;

[0009] The rolling rollers reduce the friction between the take-up roller and the driving roller, and improve the service life of the take-up roller and the driving roller.

[0010] Preferably, the seed crystal lifting mechanism further includes a counterweight box, the counterweight box is sleeved on the take-up roller, the rotating ring is rotatably sleeved on one end of the take-up roller, both groups of racks are engaged with the gear, the gear is rotatably installed inside the housing, one end of one group of racks is fixedly connected to the counterweight box, the other end of the other group of racks is fixedly connected to the rotating ring, and four guide posts are fixedly installed inside the housing, and the four guide posts are all slidably connected to the counterweight box;

[0011] The moving direction of the counterweight box is opposite to that of the take-up roller, which will balance the center-of-gravity offset caused by the movement of the take-up roller, ensure the stability of the device, and improve the product quality.

[0012] Preferably, a screw sleeve is fixedly installed inside one end of the driving roller, the screw sleeve is screwed with a screw rod, the screw rod is located inside the driving roller, and one end of the screw rod is fixedly connected to the counterweight box;

[0013] During the process of the driving roller driving the take-up roller to wind the seed crystal rope, the screw sleeve will rotate together with the driving roller. As the screw sleeve rotates, the screw rod will push the counterweight box to move in the direction away from the take-up roller. Similarly, the counterweight box makes the take-up roller move synchronously in the opposite direction through the cooperation of the two groups of racks and the gear, thereby not only achieving the above-mentioned balance of the center-of-gravity offset caused by the movement of the take-up roller, but also reducing the wear of the seed crystal rope.

[0014] Preferably, the counterweight box includes a counterweight ring, one end of one group of racks is fixedly connected to the counterweight ring, the four guide posts are all slidably connected to the counterweight ring, the counterweight ring is sleeved on the counterweight barrel, one end of the screw rod is fixedly connected to the counterweight barrel, a bolt rotatably connected to one end of the counterweight barrel, a movable disk embedded in one end of the counterweight barrel, the bolt is screwed with the movable disk, one ends of six movable rods are all fixedly connected to the outer ring of the movable disk, the other ends of the six movable rods are respectively inserted into six clamping blocks, six rectangular sliding grooves are equally angled at one end of the counterweight barrel, the six movable rods are respectively inserted into the six rectangular sliding grooves, six clearance grooves are equally angled at the other end of the counterweight barrel, the six clamping blocks are respectively located in the six clearance grooves, inclined grooves are provided on both sides of the clamping block, a pin shaft is fixedly installed at the other end of the movable rod, both ends of the pin shaft are respectively located in the two inclined grooves, a rubber pad is fixedly sleeved on one end of the screw rod, an annular clamping groove for clamping the clamping block is provided on the inner ring of the counterweight ring, and a rubber sheet is attached to the clamping block;

[0015] When the take-up roller winds the seed crystal rope, the counterweight ring slides along the guide post under the drive of the corresponding rack. At the same time, the rebound force of the rubber pad at the end of the drive roller will drive the screw rod together with the counterweight bucket to rotate, preventing the screw rod from moving axially. As a result, the counterweight bucket cannot move to the outside of the housing, ensuring that the volume of the device remains unchanged and facilitating the disassembly, assembly and handling of the device by the staff.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. During the process of the take-up roller winding the seed crystal rope, under the guidance of the spiral groove, the seed crystal rope is evenly wound on the take-up roller, avoiding the seed crystal rope being wound in the same area on the take-up roller, reducing the wear caused by the winding of the seed crystal rope, and improving the service life of the seed crystal rope.

[0018] 2. When the take-up roller moves, the take-up roller drives the corresponding rack to move. This rack drives another group of racks to move through a gear. The other group of racks drives the counterweight box to move synchronously along the four guide posts in the direction away from the take-up roller. Since the moving direction of the counterweight box is opposite to that of the take-up roller, it will balance the center-of-gravity shift caused by the movement of the take-up roller, ensuring the stability of the device and improving the quality of the product.

[0019] 3. Rotate the bolt to make the movable plate move in the direction away from the counterweight bucket. At the same time, the movable plate drives six movable rods to move along the corresponding rectangular sliding grooves. Then, the movable rods drive the end of the pin shaft to slide along the inclined groove, causing the clamping block to move into the clearance groove and releasing the clamping connection between the clamping block and the annular clamping groove, thus releasing the fixation between the counterweight ring and the counterweight bucket. Therefore, when the take-up roller winds the seed crystal rope, the counterweight ring slides along the guide post under the drive of the corresponding rack. At the same time, the rebound force of the rubber pad at the end of the drive roller will drive the screw rod together with the counterweight bucket to rotate, preventing the screw rod from moving axially. As a result, the counterweight bucket cannot move to the outside of the housing, ensuring that the volume of the device remains unchanged and facilitating the disassembly, assembly and handling of the device by the staff. Brief Description of the Drawings

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic structural diagram of the present invention.

[0022] Figure 2 It is a partial cross-sectional schematic diagram of the structure of the present invention.

[0023] Figure 3 It is a combined schematic diagram of the drive roller and the take-up roller of the present invention.

[0024] Figure 4 It is a cross-sectional schematic diagram of the seed crystal lifting mechanism of the present invention.

[0025] Figure 5 It is a further cross-sectional schematic diagram of the seed crystal lifting mechanism of the present invention.

[0026] 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.

[0027] Figure 7 It is a schematic diagram of the cross-section of the counterweight box and the driving roller combination of the present invention.

[0028] Figure 8 It is a schematic diagram of assembling the counterweight box of the present invention.

[0029] Figure 9 It is a schematic diagram of the combination of the clamping block and the movable rod of the present invention.

[0030] 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

[0031] 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

[0032] 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.

[0033] 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 lifted, the driving roller 202 is rotated by the power mechanism 3. The driving roller 202 drives the winding roller 203 to rotate. The rotating winding roller 203 drags the seed crystal rope 5, causing the seed crystal rope 5 to drive the two groups of guide wheels 41 to rotate. At the same time, the seed crystal rope 5 winds around the winding roller 203 along the spiral groove 2031. Under the frictional force between the spiral groove 2031 and the seed crystal rope 5, the winding roller 203 slides along the driving roller 202 towards the power mechanism 3, enabling the seed crystal rope 5 to be evenly wound around 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 winding process of the winding roller 203 on the seed crystal rope 5, under the guidance of the spiral groove 2031, the seed crystal rope 5 is evenly wound around the winding roller 203, avoiding the seed crystal rope 5 from winding in the same area on the winding roller 203, reducing the wear caused by the winding of the seed crystal rope 5, and improving the service life of the seed crystal rope 5.

[0034] Further, a guiding hole 2032 is provided inside the winding roller 203. The driving roller 202 is inserted into the guiding hole 2032. Four rows of rollers 2033 are rotatably installed around the inner circumference of the guiding hole 2032. The rollers 2033 are in rolling connection with the driving roller 202.

[0035] Specifically, during the movement of the winding roller 203 along the driving roller 202, the rollers 2033 inside the winding roller 203 will roll against the driving roller 202. The rolling rollers 2033 reduce the frictional force between the winding roller 203 and the driving roller 202, and improve the service life of the winding roller 203 and the driving roller 202.

[0036] As Figure 4 shown, the seed crystal lifting mechanism 2 further includes a counterweight box 204. The counterweight box 204 is sleeved on the winding roller 203. A rotating ring 205 is rotatably sleeved on one end of the winding roller 203. Both groups of racks 206 are engaged with a gear 207. The gear 207 is rotatably installed inside the housing 201. One end of one group of racks 206 is fixedly connected to the counterweight box 204, and one end of the other group of racks 206 is fixedly connected to the rotating ring 205. Four guide columns 2011 are fixedly installed inside the housing 201. All four guide columns 2011 are slidably connected to the counterweight box 204.

[0037] Specifically, during the process of winding the seed crystal rope 5 by the winding roller 203, the winding roller 203 will move along the driving roller 202 towards the power mechanism 3, causing the center of gravity of the entire device to shift during operation, resulting in a decrease in the stability of the device and a reduction in product quality. Therefore, when the winding roller 203 moves, the winding roller 203 drives the corresponding rack 206 to move. The rack 206 causes another set of racks 206 to move through the gear 207. The other set of racks 206 drives the counterweight box 204 to move synchronously along the four guide posts 2011 in the direction away from 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, ensuring the stability of the device and improving product quality.

[0038] As Figure 5 shown, a screw sleeve 2021 is fixedly installed inside one end of the driving roller 202. The screw sleeve 2021 is screwed with 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.

[0039] Specifically, the thread pitch of the screw rod 2022 is equal to the pitch of the spiral groove 2031. The movement of both 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, during the process of the driving roller 202 driving the winding roller 203 to wind 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 away from the winding roller 203. Similarly, the counterweight box 204 causes the winding roller 203 to move synchronously in the opposite direction through the cooperation of the two sets of racks 206 and the gear 207, thus not only achieving the balance of the center of gravity shift caused by the movement of the winding roller 203 but also reducing the wear of the seed crystal rope 5. Embodiment Two

[0040] As Figures 6 to 9As shown in the figure, compared with the first comparative example, another implementation manner of the present invention is as follows: The counterweight box 204 includes a counterweight ring 2041. One end of a set of racks 206 is fixedly connected to the counterweight ring 2041. Four sets of guide posts 2011 are all slidably connected to the counterweight ring 2041. The counterweight ring 2041 is sleeved on the counterweight barrel 2042. One end of the screw 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 and installed in one end of the counterweight barrel 2042, the bolt 2043 is screwed to the movable disk 2044. One end of six sets of movable rods 2045 is fixedly connected to the outer ring of the movable disk 2044. The other ends of the six sets of movable rods 2045 are respectively inserted into six sets of blocks 2046. Six rectangular sliding grooves 421 are equiangularly opened at one end of the counterweight barrel 2042. The six sets of movable rods 2045 are respectively inserted into the six rectangular sliding grooves 421. Six clearance grooves 422 are equiangularly opened at the other end of the counterweight barrel 2042. The six sets of blocks 2046 are respectively located in the six clearance grooves 422. Oblique grooves 461 are opened on both sides of the block 2046. A pin shaft 451 is fixedly installed at the other end of the movable rod 2045. Both ends of the pin shaft 451 are respectively located in the two oblique grooves 461. A rubber pad 2023 is fixedly sleeved on one end of the screw 2022. An annular card slot 411 for clamping the block 2046 is arranged on the inner ring of the counterweight ring 2041. A rubber sheet 462 is attached to the block 2046.

[0041] 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, causing most of the entire counterweight box 204 to extend outside the housing 201, increasing the volume of the entire device, which is not conducive to the disassembly, assembly, and handling of the device by the staff. When the seed crystal rope 5 on the winding roller 203 is fully released, the rubber pad 2023 will be tightly clamped between one end of the screw 2022 and the end of the driving roller 202. All six groups of clamping blocks 2046 are clamped and extruded against the annular slot 411. When the device needs to be disassembled or assembled, rotate the bolt 2043 to move the movable disk 2044 away from the counterweight barrel 2042. At the same time, the movable disk 2044 drives the six groups of movable rods 2045 to move along the corresponding rectangular sliding slots 421. Then, the movable rods 2045 drive the end of the pin shaft 451 to slide along the inclined slot 461, causing the clamping blocks 2046 to move into the clearance slot 422, releasing the clamping connection between the clamping blocks 2046 and the annular slot 411, and releasing the fixation between the counterweight ring 2041 and the counterweight barrel 2042. Therefore, when the winding roller 203 winds the seed crystal rope 5, the counterweight ring 2041 slides along the guide post 2011 under the drive of the corresponding rack 206. At the same time, the end of the driving roller 202 drives the screw 2022 to rotate together with the counterweight barrel 2042 through the rebounding force of the rubber pad 2023, preventing the screw 2022 from axially moving, and the counterweight barrel 2042 will not be able to move outside the housing 201, ensuring that the volume of the device remains unchanged and facilitating the disassembly, assembly, and handling of the device by the staff.

[0042] Working principle: The driving roller 202 is driven to rotate by the power mechanism 3. The driving roller 202 drives the winding roller 203 to rotate. The rotating winding roller 203 will drag the seed crystal rope 5, causing the seed crystal rope 5 to drive the two groups 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 frictional force between the spiral groove 2031 and the seed crystal rope 5, the winding roller 203 slides along the driving roller 202 towards the power mechanism 3, causing the seed crystal rope 5 to be 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;

[0043] When the winding roller 203 moves, the winding roller 203 drives the corresponding rack 206 to move. This rack 206 drives another group of racks 206 to move through the gear 207. The other group of racks 206 drives the counterweight box 204 to move synchronously along the four groups of guide posts 2011 away from 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 offset caused by the movement of the winding roller 203;

[0044] During the process of the driving roller 202 driving the winding roller 203 to wind 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 away from the winding roller 203. Similarly, the counterweight box 204 makes the winding roller 203 move synchronously in the opposite direction through the cooperation of two groups of racks 206 and gears 207, thereby not only achieving the balance of the center of gravity deviation caused by the movement of the winding roller 203;

[0045] When the device needs to be disassembled and assembled, rotate the bolt 2043 to make the movable disk 2044 move in the direction away from the counterweight barrel 2042. At the same time, the movable disk 2044 drives six movable rods 2045 to move along the corresponding rectangular sliding grooves 421. Then, the movable rods 2045 drive the end of the pin shaft 451 to slide along the inclined groove 461, so that the clamping block 2046 moves into the clearance groove 422, releasing the clamping connection between the clamping block 2046 and the annular clamping groove 411, and releasing the fixation between the counterweight ring 2041 and the counterweight barrel 2042. Therefore, when the winding roller 203 winds the seed crystal rope 5, the counterweight ring 2041 slides along the guide post 2011 under the drive of the corresponding rack 206. At the same time, the rebound force of the rubber pad 2023 at the end of the driving roller 202 will drive the screw rod 2022 together with the counterweight barrel 2042 to rotate, making the screw rod 2022 unable to move axially, and the counterweight barrel 2042 will not be able to move to the outside of the housing 201.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A seed crystal lifting device, comprising a base plate, characterized in that: A seed crystal lifting mechanism is arranged on the base plate, a magnetic fluid is arranged below the base plate, and two sets of guide wheels are symmetrically installed in the upper port of the magnetic fluid for rotation; The seed crystal lifting mechanism includes: The housing is fixedly mounted on the base plate; Rotating a driving roller installed in the housing, the driving roller being driven by a power mechanism; A winding roller movably mounted on the driving roller, the outer ring of which is provided with a spiral groove for winding the seed crystal rope, the upper end of the seed crystal rope passes through two sets of guide wheels and is fixedly connected to the end of the spiral groove; The winding roller is built with a guide hole, the driving roller is inserted into the guide hole, four rows of rollers are installed rotatably around the guide hole, and the rollers are connected to the driving roller in a rolling manner; The seed crystal lifting mechanism also includes: A counterweight box, which is mounted on the winding roller; A swivel ring, which is rotatably mounted on one end of the winding roller; Two sets of racks, both of which mesh 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; A screw sleeve is fixedly installed inside one end of the driving roller; The screw sleeve is threadedly connected to the screw rod, the screw rod is located in the driving roller, and one end of the screw rod is fixedly connected to the counterweight box.

2. A seed crystal lifting device according to claim 1, characterized in that: Four groups of guide posts are fixedly installed in the outer shell, and the four groups of guide posts are all slidably connected to the counterweight box.

3. A seed crystal lifting device according to claim 1, characterized in that: Weight box includes: A counterweight ring, one end of a set of racks is fixedly connected to the counterweight ring, and four sets of guide posts are all slidably connected to the counterweight ring; The counterweight ring is mounted on the counterweight barrel, and one end of the screw is fixedly connected to the counterweight barrel; Turn the bolt that connects one end of the weight barrel; A movable plate is embedded in one end of the counterweight barrel, and the movable plate is screwed with bolts; Six groups of movable rods, one end of each of the six groups of movable rods is fixedly connected to the outer ring of the movable disk; The other ends of the six groups of movable rods are respectively plugged with six groups of card blocks.

4. A seed crystal lifting device according to claim 3, characterized in that: Six groups of rectangular slide grooves are opened at equal angles at one end of the counterweight barrel, and six groups of movable rods are respectively inserted 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, and six groups of card blocks are respectively located in the six groups of avoidance grooves.

5. A seed crystal lifting device according to claim 4, characterized in that: Oblique grooves are arranged on both sides of the clamping block, a pin shaft is fixedly installed on the other end of the movable rod, and both ends of the pin shaft are respectively located in two groups of oblique grooves.

6. A seed crystal lifting device according to claim 5, characterized in that: A rubber pad is fixedly sleeved on one end of the screw rod, an annular clamping groove for clamping a clamping block is arranged on the inner ring of the counterweight ring, and a rubber sheet is attached to the clamping block.

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