A protective device and a single crystal furnace

Abstract

This invention relates to the field of photovoltaic technology and provides a protective device comprising a first rotating arm, a second rotating arm, and a telescopic assembly. The first and second rotating arms are rotatably mounted on the side wall of the sub-chamber. When the first and second rotating arms are rotated to a splicing position, a receiving hole is formed at the splicing point. The telescopic assembly is connected to the first and second rotating arms and can be used to drive the first and second rotating arms to move so that the receiving hole is embedded into the lower edge of the sub-chamber. Because the telescopic assembly drives the first and second rotating arms to form the receiving hole and embed into the lower edge of the sub-chamber, it can provide a stable and lifting force to the crystal rod through the receiving hole when the sub-chamber rotates, without the need for manual intervention, achieving automated fixing of the crystal rod, thereby improving operational safety and equipment reliability.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic technology, and in particular relates to a protective device and a single crystal furnace. Background Technology

[0002] In the production of monocrystalline silicon rods, the removal of the rod is a critical and high-risk operation. Currently, the industry commonly uses large-size hot zones to produce large-diameter, heavy monocrystalline silicon rods. The growth of the rod depends on the pulling of a thin seed crystal, which is slowly lifted and rotated by a motion mechanism above the furnace. After the rod has grown to the required diameter, the auxiliary chamber must be unscrewed to remove the rod.

[0003] However, during the opening of the auxiliary chamber, because it is fixed by the rear support arm, it will tilt slightly downwards when lifted and rotated. Simultaneously, due to the increased diameter of the crystal rod, the safety clearance between it and the inner wall of the auxiliary chamber is extremely small. When the auxiliary chamber begins to rotate or stops, the reaction force will cause the crystal rod to wobble, making it highly likely to come into contact with the inner wall. Since the auxiliary chamber is made of stainless steel and is internally water-cooled, its temperature is relatively low, while the crystal rod temperature remains as high as 300-400℃. Once in contact, the thermal stress will cause it to shatter instantly, resulting in a serious safety accident.

[0004] Currently, the industry generally uses manual intervention to reduce risk. This involves lowering the crystal rod to the lower edge of the secondary chamber before it is rotated open, and using a wooden stick or other low thermal conductivity material to help fix the crystal rod and prevent it from shaking. However, this method has significant safety hazards: crystal rod shaking may cause the steel wire rope of the lifting mechanism to bear additional impact loads, which can easily lead to fatigue fracture after long-term use, causing the crystal rod to fall; at the same time, operators need to intervene at close range to fix the crystal rod, and if the crystal rod falls, it will pose a great threat to their personal safety. Utility Model Content

[0005] The protective device and single crystal furnace provided in this embodiment of the invention aim to solve the technical problem that the existing single crystal furnace rod removal method has significant safety hazards.

[0006] This utility model is implemented as follows: a protective device includes: First rotating arm; The second rotating arm, the first rotating arm and the second rotating arm are rotatably disposed on the side wall of the auxiliary chamber, and when the first rotating arm and the second rotating arm are rotated to the splicing position, a receiving hole is formed at the splicing position of the first rotating arm and the second rotating arm; A telescopic assembly is connected to the first rotating arm and the second rotating arm, and the telescopic assembly can be used to drive the first rotating arm and the second rotating arm to move so that the receiving hole is embedded into the lower edge of the sub-chamber.

[0007] Furthermore, the protective device also includes a rotating assembly, which is rotatably connected to the first rotating arm and the second rotating arm, and is used to drive the first rotating arm and the second rotating arm to rotate.

[0008] Furthermore, the first rotating arm includes a first rotating rod and a second rotating rod, which are symmetrically arranged on both sides of the auxiliary chamber. One end of the first rotating rod and the second rotating rod are connected to the rotating assembly, and the other end of the first rotating rod and the second rotating rod forms a first semi-circular portion.

[0009] Furthermore, the second rotating arm includes a third rotating rod and a fourth rotating rod, which are symmetrically arranged on both sides of the auxiliary chamber. One end of the third rotating rod and the fourth rotating rod is connected to the rotating assembly, and the other end of the third rotating rod and the fourth rotating rod forms a second semi-arc portion. The first semi-arc portion and the second semi-arc portion are spliced ​​together to form the receiving hole.

[0010] Furthermore, the surface of the receiving hole is inclined, and the diameter of the receiving hole is adapted to the outer diameter of the crystal rod; The first and second semi-circular portions are made of composite materials, and the side in contact with the crystal rod is wrapped with high-temperature cloth.

[0011] Furthermore, the rotating assembly includes a first rotating group and a second rotating group, which are symmetrically arranged on both sides of the sub-chamber; The first rotating group includes a first crossbar and a first rotating motor and a second rotating motor located at both ends of the first crossbar; the second rotating group includes a second crossbar and a third rotating motor and a fourth rotating motor located at both ends of the second crossbar. The first rotating rod is connected to the first rotating motor, the third rotating rod is connected to the second rotating motor, the second rotating rod is connected to the third rotating motor, and the fourth rotating rod is connected to the fourth rotating motor.

[0012] Furthermore, the telescopic assembly includes a first telescopic group and a second telescopic group, which are symmetrically arranged on both sides of the sub-chamber; The first telescopic assembly includes a first telescopic motor and a first telescopic rod connected to the first telescopic motor, wherein the end of the first telescopic rod away from the first telescopic motor is connected to the first crossbar; The second telescopic assembly includes a second telescopic motor and a second telescopic rod connected to the second telescopic motor. The end of the second telescopic rod away from the second telescopic motor is connected to the second crossbar. The first telescopic assembly and the second telescopic assembly work to drive the first crossbar and the second crossbar to move along the length direction of the sub-chamber.

[0013] Furthermore, a first limiting block and a second limiting block are provided on the outer side of the sub-chamber. The first limiting block and the second limiting block are symmetrically arranged on both sides of the sub-chamber and extend along the length direction of the sub-chamber. The first crossbar is connected to the first limiting block to limit the lateral displacement of the first crossbar by the first limiting block, and the second crossbar is connected to the second limiting block to limit the lateral displacement of the second crossbar by the second limiting block.

[0014] Furthermore, the first limiting block is recessed inward on the side away from the sub-chamber to form a first clearance groove, the first clearance groove extends along the length direction of the sub-chamber, and the first crossbar is formed on the side facing the sub-chamber with a first connecting block, the first connecting block is embedded in the first clearance groove and can move along the length direction of the first clearance groove. The second limiting block is recessed inward on both sides away from the sub-chamber to form a second clearance groove. The second clearance groove extends along the length direction of the sub-chamber. The second crossbar is formed on both sides facing the sub-chamber with a second connecting block. The second connecting block is embedded in the second clearance groove and can move along the length direction of the second clearance groove.

[0015] A single crystal furnace, comprising the protective device as described in any one of the above descriptions.

[0016] The beneficial effects achieved by this utility model are as follows: because the telescopic component drives the first rotating arm and the second rotating arm to form a receiving hole and embed into the lower edge of the sub-chamber, it can provide a stable and lifting force to the crystal rod through the receiving hole when the sub-chamber rotates, without the need for manual intervention, thereby realizing the automatic fixing of the crystal rod. This effectively prevents the crystal rod from contacting the inner wall of the sub-chamber due to left and right swinging, which could lead to the crystal rod breaking or accidentally falling, thus improving the advantages of operational safety and equipment reliability. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the protective device provided in this embodiment of the utility model; Figure 2 This is a plan view of the protective device provided in an embodiment of the present utility model; Figure 3This is another three-dimensional structural schematic diagram of the protective device provided in this embodiment of the utility model; Figure 4 This is another plan view of the protective device provided in this embodiment of the utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] In existing technologies, the industry generally uses manual intervention to reduce risk. This involves lowering the crystal rod to the lower edge of the sub-chamber before it is rotated open and using a wooden stick or other low thermal conductivity material to help fix the crystal rod and prevent it from swaying. However, this method has significant safety hazards: crystal rod swaying may cause the steel wire rope of the lifting mechanism to bear additional impact loads, which can easily lead to fatigue fracture after long-term use, causing the crystal rod to fall. At the same time, operators need to intervene closely to fix the crystal rod, and if the crystal rod falls, it will pose a great threat to their personal safety. This application, through the setting of a telescopic component, a first rotating arm, and a second rotating arm, uses the telescopic component to drive the first and second rotating arms to form a receiving hole that is embedded in the lower edge of the sub-chamber. Therefore, when the sub-chamber rotates, it can provide a stable and lifting force to the crystal rod through the receiving hole, without the need for manual intervention. This achieves automated fixing of the crystal rod, effectively preventing the crystal rod from contacting the inner wall of the sub-chamber due to left and right swinging, which could lead to crystal rod breakage or accidental falling. This improves operational safety and equipment reliability.

[0020] Example 1 Please see Figures 1 to 4 The present invention is implemented as follows: a protective device 100 includes: First rotating arm 10; The second rotating arm 20, the first rotating arm 10 and the second rotating arm 20 are rotatably disposed on the side wall of the auxiliary chamber 30. When the first rotating arm 10 and the second rotating arm 20 are rotated to the splicing position, a receiving hole 60 is formed at the splicing position of the first rotating arm 10 and the second rotating arm 20. Telescopic assembly 40 is connected to the first rotating arm 10 and the second rotating arm 20. The telescopic assembly 40 can be used to drive the first rotating arm 10 and the second rotating arm 20 to move so that the receiving hole 60 is embedded into the lower edge of the sub-chamber 30.

[0021] In this embodiment, the first rotating arm 10 refers to a single-sided rotating mechanism disposed on the side wall of the sub-chamber 30, specifically having an arc-shaped structure at its bottom. The second rotating arm 20 refers to a rotating mechanism symmetrically arranged with the first rotating arm 10, forming a complete constraint structure through bottom splicing. The telescopic component 40 refers to a linear drive device, specifically implemented by an electric push rod or a hydraulic cylinder, which drives the rotating arm to move axially along the sub-chamber 30 through a rigid connection. The receiving hole 60 refers to a closed hole structure formed by splicing the bottoms of the first rotating arm 10 and the second rotating arm 20, with its inner diameter maintaining a clearance fit with the outer diameter of the crystal rod. After the receiving hole 60 is formed, it can be moved to the lower edge of the sub-chamber 30 through the telescopic component 40. At this time, the lower end of the crystal rod can be supported and limited through the receiving hole 60, effectively preventing the crystal rod from contacting the inner wall of the sub-chamber 30 due to left and right swinging, thus preventing the crystal rod from cracking or accidentally falling, thereby improving operational safety and equipment reliability. The structure is simple and easy to implement.

[0022] Specifically, when the sub-chamber 30 begins to rotate, the first rotating arm 10 and the second rotating arm 20 rotate inward around their respective axes. When the bottoms of the first rotating arm 10 and the second rotating arm 20 are joined together, a complete receiving hole 60 is formed, which encloses the outer surface of the crystal rod. The telescopic assembly 40 then pushes the first rotating arm 10 and the second rotating arm 20 to move axially along the sub-chamber 30, causing the receiving hole 60 to move towards the lower edge of the sub-chamber 30, precisely embedding the receiving hole 60 into the positioning area of ​​the lower edge of the sub-chamber 30. During this process, the bottom of the crystal rod enters the receiving hole 60, and a circumferential constraint is formed around the periphery of the receiving hole 60, limiting its lateral displacement. The reaction force generated by the rotation of the sub-chamber 30 is transmitted to the sub-chamber 30 body through the rigidly connected first rotating arm 10 and second rotating arm 20, preventing the crystal rod from wobbling. After the operation is completed, the telescopic assembly 40 drives the first rotating arm 10 and the second rotating arm 20 to reset, rotating in opposite directions to separate and release the constraint on the crystal rod.

[0023] In this embodiment, the ingot removal process is automated, completely eliminating the need for manual intervention. The receiving hole 60 provides a full-circumferential rigid constraint on the ingot, effectively suppressing lateral displacement and rotational sway. The coordinated movement of the rotating arm and the telescopic component 40 ensures that the constraint device is precisely embedded in the lower edge of the sub-chamber 30, preventing the ingot from contacting the inner wall of the sub-chamber 30. The mechanical fixing method improves system reliability and prevents falls caused by rope breakage. The dynamically splicing structure adapts to different working conditions, automatically avoiding the ingot's movement space when not in operation; the design is ingenious and the structure is simple.

[0024] It is understood that in this embodiment, the first rotating arm 10 and the second rotating arm 20 are generally made of stainless steel. Stainless steel has the advantages of high hardness and high corrosion resistance, which is beneficial to extending the service life of the first rotating arm 10 and the second rotating arm 20. Of course, in other embodiments, the first rotating arm 10 and the second rotating arm 20 can also be made of other materials. The specific choice can be made according to the actual situation, and no limitation is made here.

[0025] Example 2 Please see Figures 1 to 4 Furthermore, the protective device 100 also includes a rotating assembly 50, which is rotatably connected to the first rotating arm 10 and the second rotating arm 20, and is used to drive the first rotating arm 10 and the second rotating arm 20 to rotate.

[0026] Specifically, the rotating component 50 refers to a mechanical structure capable of transmitting rotational power. It can be implemented using a motor drive system with a transmission shaft and gears. Its connection point with the first rotating arm 10 and the second rotating arm 20 is located at the rotation axis of the first rotating arm 10 and the second rotating arm 20. The rotating component 50 allows the rotation angle and speed of the rotating arms to be controlled programmatically, eliminating the need for manual adjustment and thus making the protective device 100 more intelligent.

[0027] Furthermore, by setting up the rotating assembly 50, the driving process can be automated, and the rotational motion of the first rotating arm 10 and the second rotating arm 20 is precisely transmitted by a rigid transmission mechanism. The output torque of the drive motor in the rotating assembly 50 is transmitted to the rotation shafts of the first rotating arm 10 and the second rotating arm 20 via reduction gears, so that the first rotating arm 10 and the second rotating arm 20 rotate synchronously along a preset trajectory. During the opening of the auxiliary chamber 30, the rotating assembly 50 adjusts the unfolding angle of the first rotating arm 10 and the second rotating arm 20 in real time according to the position of the crystal rod, ensuring that the receiving hole 60 formed by the splicing of the first rotating arm 10 and the second rotating arm 20 always remains coaxial with the crystal rod axis. The rotation angle of the first rotating arm 10 and the second rotating arm 20 is controlled in a closed loop through encoder feedback to avoid poor contact between the receiving hole 60 and the crystal rod due to human operation errors.

[0028] In this embodiment, precise control of the rotational motion of the first rotating arm 10 and the second rotating arm 20 is achieved, solving the positioning deviations and safety hazards associated with manual adjustment. The automated drive of the rotating assembly 50 ensures precise matching between the receiving hole 60 and the outer diameter of the crystal rod, preventing crystal rod wobbling or displacement due to poor contact. The closed-loop control of the drive system further improves the repeatability of the rotating arm's motion trajectory, ensuring the stability of the protective device 100 during repeated use.

[0029] Example 3 Please see Figure 1 and Figure 3 Furthermore, the first rotating arm 10 includes a first rotating rod 101 and a second rotating rod 102. The first rotating rod 101 and the second rotating rod 102 are symmetrically arranged on both sides of the auxiliary chamber 30. One end of the first rotating rod 101 and the second rotating rod 102 is connected to the rotating assembly 50, and the other end of the first rotating rod 101 and the second rotating rod 102 forms a first semi-arc portion 103.

[0030] The second rotating arm 20 includes a third rotating rod 201 and a fourth rotating rod 202. The third rotating rod 201 and the fourth rotating rod 202 are symmetrically arranged on both sides of the auxiliary chamber 30. One end of the third rotating rod 201 and the fourth rotating rod 202 is connected to the rotating assembly 50. The other end of the third rotating rod 201 and the fourth rotating rod 202 forms a second semi-arc portion 203. The first semi-arc portion 103 and the second semi-arc portion 203 are spliced ​​together to form a receiving hole 60.

[0031] In this embodiment, symmetrical arrangement means that the first rotating rod 101 and the second rotating rod 102, or the third rotating rod 201 and the fourth rotating rod 202, are mirror images of each other with the central axis of the sub-chamber 30 as the reference. Specifically, this is achieved by placing rods of the same length and material on the left and right sides of the sub-chamber 30. The symmetrical layout eliminates the torque difference caused by applying force on one side. The first semi-arc 103 refers to the arc-shaped structure formed at the bottom of the first rotating rod 101 and the second rotating rod 102, and the second semi-arc 203 refers to the arc-shaped structure formed at the bottom of the third rotating rod 201 and the fourth rotating rod 202. Specifically, it can be machined with an arc contour that matches the outer diameter of the crystal rod, and the arc-shaped contact surface disperses the local stress of the crystal rod.

[0032] Furthermore, during operation, the first rotating rod 101 and the second rotating rod 102 rotate at the same speed, and the third rotating rod 201 and the fourth rotating rod 202 rotate at the same speed.

[0033] This design solves the problem of swaying and displacement of the crystal rod caused by asymmetrical support during the opening of the sub-chamber 30. The stress state of the crystal rod is balanced by the synchronous first rotating rod 101 and second rotating rod 102, as well as the third rotating rod 201 and fourth rotating rod 202 on both sides. Combined with the arc-shaped contact surface to reduce local stress, the crystal rod is stably fixed during the movement process, avoiding contact and collision with the inner wall of the sub-chamber 30.

[0034] Example 4 Please see Figure 3 Furthermore, the surface of the receiving hole 60 is inclined, and the diameter of the receiving hole 60 is adapted to the outer diameter of the crystal rod; The first semi-circular portion 103 and the second semi-circular portion 203 are made of composite materials, and the side in contact with the crystal rod is wrapped with high-temperature cloth.

[0035] In this embodiment, the surface inclination of the receiving hole 60 refers to the non-parallel angle between the hole wall and the crystal rod axis. Specifically, this can be achieved using a conical structure with an acute angle between the inclined surfaces. Furthermore, the inclined surfaces slope inward from the hole wall of the receiving hole 60, and the angle between the surface and bottom of the receiving hole 60 is acute. This design guides the crystal rod to slide naturally into the predetermined position along the axial direction. Diameter matching means that the difference between the inner diameter of the receiving hole 60 and the outer diameter of the crystal rod is small. This can be achieved using an adjustable arc-shaped clamping component. This design forms a flexible contact to compensate for the thermal expansion and contraction of the crystal rod. Further, the composite material refers to a layered structure made of a carbon fiber reinforced polymer matrix. Specifically, this can be achieved using an alternating layering process of carbon fiber cloth and epoxy resin. This material maintains high strength while reducing thermal conductivity. Preferably, high-temperature cloth wrapping refers to covering the contact surface with ceramic fiber fabric that can withstand temperatures above 600°C. Specifically, the fabric can be adhered to the arc-shaped surface using a high-temperature resistant adhesive. This structure forms a thermal buffer layer to isolate the crystal rod from direct contact with the metal components.

[0036] Specifically, when the crystal rod is embedded in the receiving hole 60, the inclined surface eliminates lateral displacement through guiding action. Since the diameter of the receiving hole 60 matches the outer diameter of the crystal rod, radial displacement of the crystal rod can be restricted while allowing slight axial movement. The first semi-circular portion 103 and the second semi-circular portion 203, made of composite materials, reduce heat transfer to the sub-chamber 30 through their low thermal conductivity, while the high-temperature cloth wrapping layer further slows down the heat diffusion rate, ensuring that the temperature gradient change rate on the crystal rod surface is below the critical thermal stress threshold. In this process, the combination of the inclined structure and the matching diameter compensates for the displacement deviation generated when the sub-chamber 30 is unscrewed, and the mechanical strength of the composite material and the thermal insulation performance of the high-temperature cloth form a synergistic protection mechanism.

[0037] This design avoids contact cracking between the crystal rod and the lower edge of the sub-chamber 30 due to temperature differences. At the same time, by using an appropriate diameter and composite material wrapping to suppress crystal rod swaying, it solves the problems of uncontrolled thermal stress and insufficient mechanical stability in existing technologies with manual fixation.

[0038] Example 5 Please see Figure 1 Furthermore, the rotating assembly 50 includes a first rotating group 501 and a second rotating group 502, which are symmetrically arranged on both sides of the auxiliary chamber 30. The first rotating group 501 includes a first crossbar 5011 and a first rotating motor (not shown) and a second rotating motor (not shown) located at both ends of the first crossbar 5011. The second rotating group 502 includes a second crossbar 5021 and a third rotating motor (not shown) and a fourth rotating motor (not shown) located at both ends of the second crossbar 5021. The first rotating rod 101 is connected to the first rotating motor, the third rotating rod 201 is connected to the second rotating motor, the second rotating rod 102 is connected to the third rotating motor, and the fourth rotating rod 202 is connected to the fourth rotating motor.

[0039] The first rotating group 501 refers to the drive unit located on one side of the auxiliary chamber 30, which forms a synchronous drive unit for the rotating motors on both sides through a rigid connection of the crossbar. The second rotating group 502 forms a mirror-symmetrical layout with the first rotating group 501, and its structural composition is the same as that of the first rotating group 501. This symmetrical design can balance the driving torque on both sides of the auxiliary chamber 30. The first crossbar 5011 serves as the load-bearing structure of the first rotating group 501, and can be implemented using a rectangular cross-section hollow tube. Its two ends are rigidly connected to the output shafts of the first and second rotating motors respectively through flanges. The rotating motor is preferably a closed-loop controlled stepper motor with an encoder, which can accurately control the rotation angle of the rotating rod. Each rotating rod corresponds to an independent motor drive, which can eliminate transmission chain errors.

[0040] Specifically, when the first rotating arm 10 and the second rotating arm 20 need to perform an unfolding action, the control system sends synchronization pulse signals to the first rotating motor, the second rotating motor, the third rotating motor, and the fourth rotating motor. The first rotating motor of the first rotating group 501 drives the first rotating rod 101 to rotate clockwise, and the second rotating motor drives the third rotating rod 201 to rotate counterclockwise; the two are kept in torque balance by the first crossbar 5011. The third rotating motor of the second rotating group 502 drives the second rotating rod 102 to rotate clockwise, and the fourth rotating motor drives the fourth rotating rod 202 to rotate counterclockwise; the two are kept in motion synchronization by the second crossbar 5021. The independent control of the four motors allows for fine-tuning compensation of the rotation angle of each rotating rod at the ±0.1° level. When a misalignment is detected between the first semi-circular portion 103 and the second semi-circular portion 203, the rotation angle parameters of the corresponding motor can be adjusted individually. The rigid connection between the first crossbar 5011 and the second crossbar 5021 ensures that the output torque of the two rotating motors on the same side is transmitted evenly, avoiding deformation of the rotating arm due to uneven force on one side.

[0041] This configuration enables independent and precise control of the first rotating arm 10 and the second rotating arm 20, keeping the splicing error between the first semi-circular portion 103 and the second semi-circular portion 203 within the nanometer level, ensuring precise engagement between the receiving hole 60 and the lower edge of the sub-chamber 30. When the sub-chamber 30 rotates open and vibrates, the first, second, third, and fourth rotating motors can adjust their output torque in real time to counteract the crystal rod's wobbling, avoiding positioning deviations caused by the asynchrony of the first rotating arm 10 and the second rotating arm 20.

[0042] Example 6 Please see Figures 1 to 4Furthermore, the telescopic assembly 40 includes a first telescopic group 401 and a second telescopic group 402, which are symmetrically arranged on both sides of the auxiliary chamber 30. The first telescopic assembly 401 includes a first telescopic motor 4011 and a first telescopic rod 4012 connected to the first telescopic motor 4011. The end of the first telescopic rod 4012 away from the first telescopic motor 4011 is connected to the first crossbar 5011. The second telescopic assembly 402 includes a second telescopic motor 4021 and a second telescopic rod 4022 connected to the second telescopic motor 4021. One end of the second telescopic rod 4022 away from the second telescopic motor 4021 is connected to the second crossbar 5021. The first telescopic assembly 401 and the second telescopic assembly 402 work to drive the first crossbar 5011 and the second crossbar 5021 to move along the length direction of the auxiliary chamber 30.

[0043] In this embodiment, the symmetrical arrangement of the first telescopic assembly 401 and the second telescopic assembly 402 means that the first telescopic assembly 401 and the second telescopic assembly 402 are respectively arranged symmetrically on both sides of the auxiliary chamber 30. Specifically, this can be achieved by a mirror-symmetrical mechanical installation method, and the torque imbalance caused by unilateral force application is eliminated by dual-sided synchronous drive. The first telescopic motor 4011 and the second telescopic motor 4021 are power devices capable of outputting linear displacement. Specifically, they can be implemented by a linear module combining a servo motor and a ball screw, and the displacement accuracy is achieved through closed-loop control. The first crossbar 5011 and the second crossbar 5021 are rigid connecting parts connecting the rotating arm and the telescopic assembly 40. Specifically, they can be implemented by a rectangular cross-section steel beam, whose length direction is perpendicular to the length direction of the auxiliary chamber 30, forming a stable force transmission path.

[0044] Furthermore, when the first rotating arm 10 and the second rotating arm 20 rotate and connect to form the receiving hole 60, the first telescopic motor 4011 and the second telescopic motor 4021 are started synchronously. The linear displacement of the first telescopic rod 4012 and the second telescopic rod 4022 is transmitted to the first crossbar 5011 and the second crossbar 5021 through a rigid connection, driving the first rotating arm 10 and the second rotating arm 20 to move as a whole along the length direction of the auxiliary chamber 30. Since the first telescopic group 401 and the second telescopic group 402 are controlled independently, when a deviation in displacement on both sides is detected, the motor output can be adjusted in real time to maintain synchronous movement. The movement trajectory of the first crossbar 5011 and the second crossbar 5021 along the length direction of the auxiliary chamber 30 forms a spatial match with the movement path of the auxiliary chamber 30 when it is rotated open, so that the receiving hole 60 can move along a predetermined trajectory to the lower edge of the auxiliary chamber 30. By restricting the first crossbar 5011 and the second crossbar 5021 to move only in a single direction, the degree of freedom of the rotating arm in the transverse plane is eliminated, avoiding positioning deviations caused by mechanical backlash or vibration.

[0045] Example 7 Please see Figures 1 to 4 Furthermore, a first limiting block 70 and a second limiting block 80 are provided on the outer side of the auxiliary chamber 30. The first limiting block 70 and the second limiting block 80 are symmetrically arranged on both sides of the auxiliary chamber 30, and the first limiting block 70 and the second limiting block 80 extend along the length direction of the auxiliary chamber 30. The first horizontal bar 5011 is connected to the first limiting block 70 to limit the lateral displacement of the first horizontal bar 5011 through the first limiting block 70, and the second horizontal bar 5021 is connected to the second limiting block 80 to limit the lateral displacement of the second horizontal bar 5021 through the second limiting block 80.

[0046] The first limiting block 70 refers to a longitudinal guide structure installed on one side of the outer wall of the auxiliary chamber 30, with its extension direction parallel to the axis of the auxiliary chamber 30. The second limiting block 80 is a mirror-symmetric structure, and its construction is the same as that of the first limiting block 70. Lateral offset refers to the displacement component perpendicular to the axial direction of the auxiliary chamber 30 generated by the first crossbar 5011 and the second crossbar 5021 during the driving process of the first telescopic assembly 40 and the second telescopic group 402. This directional degree of freedom can be eliminated through the rigid connection between the first limiting block 70 and the first crossbar 5011, and the second limiting block 80 and the second crossbar 5021.

[0047] For example, when the first telescopic motor 4011 drives the first telescopic rod 4012 to move the first crossbar 5011, the first crossbar 5011 is connected to the first limiting block 70. Therefore, the first crossbar 5011 slides axially within the sub-chamber 30 within the first limiting block 70, maintaining only the lateral degree of freedom. Since the first limiting block 70 and the second limiting block 80 are symmetrically arranged, the lateral forces borne by the first crossbar 5011 and the second crossbar 5021 are mutually canceled out.

[0048] In this embodiment, the lateral offset of the first crossbar 5011 and the second crossbar 5021 during the rotation of the sub-chamber 30 is effectively eliminated, ensuring that the first rotating arm 10 and the second rotating arm 20 maintain a linear motion trajectory when driving the crystal rod axially. During the fixing process, the crystal rod will not experience additional oscillation due to the offset of the first crossbar 5011 and the second crossbar 5021, significantly reducing the risk of the crystal rod contacting the inner wall of the sub-chamber 30. Simultaneously, this guiding system can maintain stable constraint performance over a long period, avoiding the attenuation of positioning accuracy due to component wear.

[0049] Example 8 Please see Figures 1 to 4 Furthermore, the first limiting block 70 is recessed inward on the side away from the sub-chamber 30 to form a first clearance groove 701. The first clearance groove 701 extends along the length direction of the sub-chamber 30. The first crossbar 5011 is formed on the side facing the sub-chamber 30 with a first connecting block. The first connecting block is embedded in the first clearance groove 701 and can move along the length direction of the first clearance groove 701. The second limiting block 80 is recessed inward on the two sides away from the sub-chamber 30 to form a second clearance groove 801. The second clearance groove 801 extends along the length direction of the sub-chamber 30. The second crossbar 5021 is formed with a second connecting block on the two sides facing the sub-chamber 30. The second connecting block is embedded in the second clearance groove 801 and can move along the length direction of the second clearance groove 801.

[0050] Specifically, the first clearance groove 701 refers to a longitudinal groove structure provided on the first limiting block 70. It can be formed by milling the surface of the metal limiting block using machining methods, and can be racetrack-shaped. Its groove depth matches the height of the first connecting block, used to constrain the lateral displacement of the first connecting block. The first connecting block refers to a protruding structure fixed to the side of the first crossbar 5011. It can be connected to the crossbar by welding or bolting, and its width is slightly smaller than the width of the first clearance groove 701, allowing the first connecting block to slide only longitudinally within the first clearance groove 701. The cooperation method between the second clearance groove 801 and the second connecting block is the same as that of the first connecting block and the first clearance groove 701, and will not be described in detail here.

[0051] In this embodiment, by using the color values ​​of the first connecting block and the first clearance groove 701, as well as the second connecting block and the second clearance groove 801, the first crossbar 5011 and the second crossbar 5021 are prevented from shifting laterally during the extension and retraction process, ensuring the straightness of the driving trajectory of the first rotating arm 10 and the second rotating arm 20, so that the receiving hole 60 of the protective device 100 can be accurately embedded in the lower edge of the sub-chamber 30, avoiding crystal rod fixing failure due to mechanical deviation.

[0052] Example 9 A single crystal furnace includes a protective device 100 as described in any one of Embodiments 1 to 9 above.

[0053] The beneficial effects achieved by this utility model are as follows: through the arrangement of the telescopic component 40, the first rotating arm 10, and the second rotating arm 20, since the telescopic component 40 drives the first rotating arm 10 and the second rotating arm 20 to form a receiving hole 60 and embed it into the lower edge of the sub-chamber 30, when the sub-chamber 30 rotates, it can provide a stable and lifting force to the crystal rod through the receiving hole 60, without the need for manual intervention, thereby realizing the automatic fixing of the crystal rod. This effectively prevents the crystal rod from contacting the inner wall of the sub-chamber 30 due to the left and right swinging of the crystal rod, which could lead to the crystal rod breaking or accidentally falling, thus improving the advantages of operational safety and equipment reliability.

[0054] It is understood that those skilled in the art can combine various implementation methods in the above embodiments under the guidance of the above examples to obtain technical solutions with multiple implementation methods.

[0055] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A protective device, characterized in that It includes: First rotating arm; The second rotating arm, the first rotating arm and the second rotating arm are rotatably disposed on the side wall of the auxiliary chamber, and when the first rotating arm and the second rotating arm are rotated to the splicing position, a receiving hole is formed at the splicing position of the first rotating arm and the second rotating arm; A telescopic assembly is connected to the first rotating arm and the second rotating arm, and the telescopic assembly can be used to drive the first rotating arm and the second rotating arm to move so that the receiving hole is embedded into the lower edge of the sub-chamber.

2. The guard of claim 1, wherein The protective device further includes a rotating assembly, which is rotatably connected to the first rotating arm and the second rotating arm, and is used to drive the first rotating arm and the second rotating arm to rotate.

3. The guard of claim 2, wherein, The first rotating arm includes a first rotating rod and a second rotating rod, which are symmetrically arranged on both sides of the auxiliary chamber. One end of the first rotating rod and the second rotating rod are connected to the rotating assembly, and the other end of the first rotating rod and the second rotating rod forms a first semi-circular portion.

4. The guard of claim 3, wherein The second rotating arm includes a third rotating rod and a fourth rotating rod, which are symmetrically arranged on both sides of the auxiliary chamber. One end of the third rotating rod and the fourth rotating rod is connected to the rotating assembly, and the other end of the third rotating rod and the fourth rotating rod forms a second semi-arc portion. The first semi-arc portion and the second semi-arc portion are spliced ​​together to form the receiving hole.

5. The guard of claim 4, wherein, The surface of the receiving hole is inclined, and the diameter of the receiving hole is adapted to the outer diameter of the crystal rod; The first and second semi-circular portions are made of composite materials, and the side in contact with the crystal rod is wrapped with high-temperature cloth.

6. The guard of claim 5, wherein The rotating assembly includes a first rotating group and a second rotating group, which are symmetrically arranged on both sides of the sub-chamber. The first rotating group includes a first crossbar and a first rotating motor and a second rotating motor located at both ends of the first crossbar; the second rotating group includes a second crossbar and a third rotating motor and a fourth rotating motor located at both ends of the second crossbar. The first rotating rod is connected to the first rotating motor, the third rotating rod is connected to the second rotating motor, the second rotating rod is connected to the third rotating motor, and the fourth rotating rod is connected to the fourth rotating motor.

7. The guard of claim 6, wherein The telescopic assembly includes a first telescopic group and a second telescopic group, which are symmetrically arranged on both sides of the auxiliary chamber. The first telescopic assembly includes a first telescopic motor and a first telescopic rod connected to the first telescopic motor, wherein the end of the first telescopic rod away from the first telescopic motor is connected to the first crossbar; The second telescopic assembly includes a second telescopic motor and a second telescopic rod connected to the second telescopic motor. The end of the second telescopic rod away from the second telescopic motor is connected to the second crossbar. The first telescopic assembly and the second telescopic assembly work to drive the first crossbar and the second crossbar to move along the length direction of the sub-chamber.

8. The protective device as described in claim 7, characterized in that, A first limiting block and a second limiting block are provided on the outer side of the auxiliary chamber. The first limiting block and the second limiting block are symmetrically arranged on both sides of the auxiliary chamber and extend along the length direction of the auxiliary chamber. The first crossbar is connected to the first limiting block to limit the lateral displacement of the first crossbar by the first limiting block, and the second crossbar is connected to the second limiting block to limit the lateral displacement of the second crossbar by the second limiting block.

9. The guard of claim 8, wherein, The first limiting block is recessed inward on the side away from the sub-chamber to form a first clearance groove. The first clearance groove extends along the length direction of the sub-chamber. The first crossbar is formed on the side facing the sub-chamber with a first connecting block. The first connecting block is embedded in the first clearance groove and can move along the length direction of the first clearance groove. The second limiting block is recessed inward on both sides away from the sub-chamber to form a second clearance groove. The second clearance groove extends along the length direction of the sub-chamber. The second crossbar is formed on both sides facing the sub-chamber with a second connecting block. The second connecting block is embedded in the second clearance groove and can move along the length direction of the second clearance groove.

10. A single crystal furnace characterized by comprising: Includes the protective device as described in any one of claims 1-9.

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