Protection device and single crystal furnace

Abstract

The utility model provides a protection device and a single crystal furnace, and the protection device comprises a leveling device which is arranged at a crystal pulling part of the single crystal furnace; the heavy hammer is connected to a lifting rope of the single crystal furnace, is positioned at the bottom of the leveling device, and can approach the leveling device under the pulling of the lifting rope; the first detection assembly is arranged on the single crystal furnace and is used for detecting the heavy hammer reaching the first position; the second detection assembly is arranged on the single crystal furnace and is used for detecting the heavy hammer reaching a second position, and the second position is higher than the first position; and the control and driving assembly is electrically connected with the first detection assembly and the second detection assembly so as to generate a detection signal and stop the lifting rope. Therefore, through the arrangement of the second detection assembly, under the condition that the first detection assembly fails, economic losses caused by breakage of the lifting rope due to the fact that the heavy hammer continuously gets close to the leveling device can be avoided.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a protection device and a single crystal furnace. Background Art

[0002] The working principle of the seed crystal lifting mechanism of the single crystal furnace is that a weight and a seed crystal chuck are connected to the lower end of the tungsten wire rope on the winding wheel. The seed crystal chuck is used to clamp the seed crystal. During the single crystal generation process, the motor acts on the winding wheel, causing the tungsten wire rope to pull the weight and the seed crystal chuck upward.

[0003] In order to prevent the tungsten wire rope from continuously pulling the heavy hammer upward and damaging the lifting mechanism, a limit device is provided in the prior art to control the operation of the motor so that the heavy hammer can stop at a certain upper limit position. However, the limit device may fail. If the limit device fails, the motor will continue to run until the heavy hammer hits the diverter plate of the lower flange of the leveling device, the tungsten wire rope breaks, the crystal rod falls, and even the entire lifting mechanism is damaged, causing economic losses. Utility Model Content

[0004] In view of this, the present application provides a protection device, which can provide secondary protection for the lifting head when the limit device fails, thereby avoiding economic losses caused by the breakage of the tungsten wire rope. In addition, the present application also provides a single crystal furnace including the above protection device.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A protection device, comprising:

[0007] A leveling device is arranged at the crystal pulling part of the single crystal furnace;

[0008] A heavy hammer, connected to the pulling rope of the single crystal furnace and located at the bottom of the leveling device, and can be moved closer to the leveling device when pulled by the pulling rope;

[0009] A first detection component is disposed in the single crystal furnace and is used to detect the weight reaching the first position;

[0010] A second detection component is disposed in the single crystal furnace and is used to detect that the weight has reached a second position, and the second position is higher than the first position;

[0011] The control and drive component is electrically connected to the first detection component and the second detection component to generate a detection signal and stop the pulling rope.

[0012] Optionally, in the above-mentioned protection device, the single crystal furnace includes a diverter plate arranged on the leveling device, and the second detection component includes a conductive part arranged on the diverter plate, and the heavy hammer moved to the second position contacts the conductive part to form an energized circuit and generates the detection signal to control the stopping of the pulling rope.

[0013] Optionally, in the above-mentioned protective device, the second detection component includes a first sensor capable of emitting a light beam and a second sensor capable of receiving the light beam, the first sensor and the second sensor are arranged in alignment, and the weight can pass between the first sensor and the second sensor to block the propagation of the light beam and cause the first sensor and / or the second sensor to generate the detection signal.

[0014] Optionally, in the above-mentioned protection device, the second detection component includes a proximity switch capable of detecting the movement of the weight to the second position.

[0015] Optionally, in the above-mentioned protection device, a sealing joint is provided on the leveling device, a wiring terminal is provided on the conductive member, the sealing joint is connected to one end of the power supply, the wiring terminal is connected to the other end of the power supply, and the wiring terminal is electrically connected to the sealing joint through a wire.

[0016] Optionally, in the above-mentioned protection device, a clamping piece is provided on the leveling device, and the clamping piece is used to clamp the connecting wire between the sealing joint and the connecting terminal.

[0017] Optionally, in the above-mentioned protective device, the single crystal furnace includes a diverter plate arranged on the leveling device, and the leveling device is provided with the first sensor and the second sensor facing the direction of the weight, and the first sensor and the second sensor are respectively connected to the leveling device through a first connecting member and a second connecting member, and are distributed on both sides of the diverter plate.

[0018] Optionally, in the above-mentioned protection device, the leveling device is provided with the proximity switch in the direction of the weight, and the proximity switch is connected to the leveling device via a third connecting member.

[0019] Optionally, in the above-mentioned protection device, the material of the diverter plate is insulating material.

[0020] A single crystal furnace comprises any one of the protection devices described above.

[0021] The present application provides a protection device, and the specific working principle is as follows: under the action of the control and drive components, the weight can be pulled close to the leveling device by the pull rope of the single crystal furnace until the first detection component detects that the weight has reached the first position, and the first detection component sends a detection signal and transmits the detection signal to the control and drive components to stop the pull rope from running, thereby stopping the weight at the first position. However, the first detection component may fail. At this time, the weight continues to approach the leveling device until the second detection component detects that the weight has reached the second position and generates a detection signal, so that the weight stops at the second position. It can be seen that the setting of the second detection component can prevent the weight from continuously approaching the leveling device and causing the pull rope to break and cause economic losses when the first detection component fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 A front view of a protective device provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a protection device provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of another protection device provided in an embodiment of the present application;

[0026] Figure 4 for Figure 3 A partial enlarged view of

[0027] Figure 5 A schematic diagram of the structure of another protection device provided in an embodiment of the present application.

[0028] 1. Leveling device; 2. Weight; 3. Pull rope; 4. Diverter plate; 5. Conductive member; 6. First sensor; 7. Second sensor; 8. Proximity switch; 9. Sealing joint; 10. Wiring terminal; 11. Snap-on member; 12. First connecting member; 13. Second connecting member; 14. Third connecting member; 15. Wire. DETAILED DESCRIPTION

[0029] The present application provides a protection device, which can provide secondary protection for the lifting head when the limit device fails, thereby avoiding economic losses caused by the breakage of the tungsten wire rope. In addition, the present application also provides a single crystal furnace including the above protection device.

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] In the prior art, during the single crystal generation process, the pulling rope 3 in the single crystal furnace can drive the weight 2 and the seed crystal chuck to move. In order to enable the weight 2 and the seed crystal chuck to stop at the upper limit position set in advance, a limit switch is specially provided. However, after the limit switch fails, the motor still runs until the weight 2 abuts against the leveling device 1, the pulling rope 3 is broken, the crystal rod falls, and even the lifting mechanism is damaged, causing great economic losses.

[0032] like Figure 1-Figure 5 As shown, an embodiment of the present application provides a protection device, which includes a leveling device 1, a weight 2, a first detection component, a second detection component and a control and drive component. The leveling device 1 is arranged at the crystal pulling part of the single crystal furnace, the weight 2 is located at the bottom of the leveling device 1, and can approach the leveling device 1 under the action of the pull rope 3, the first detection component is arranged in the single crystal furnace, and is used to detect the weight 2 reaching the first position, the second detection component is arranged in the single crystal furnace, and is used to detect the weight 2 reaching the second position, and the second position is higher than the first position, and the control and drive component is electrically connected to the first detection component and the second detection component to generate a detection signal and stop the pull rope 3. The specific working principle is as follows: under the action of the control and drive component, the weight 2 can approach the leveling device 1 under the pull of the pull rope 3 of the single crystal furnace until the first detection component detects the weight 2 reaching the first position, the first detection component sends a detection signal, and transmits the detection signal to the control and drive component to stop the pull rope 3, thereby stopping the weight 2 at the first position. However, the first detection component may fail. At this time, the weight 2 continues to approach the leveling device 1 until the second detection component detects that the weight 2 has reached the second position and generates a detection signal, so that the weight 2 stops at the second position.

[0033] It should be noted that the control and drive component is used to drive the lifting rope 3 to move and control the start and stop of the lifting rope 3, that is, whether the lifting rope 3 moves and stops is controlled by the control and drive component; the control and drive component includes a control part and a drive part, wherein the drive part can be but is not limited to a motor, and the control part includes a sensor and a controller, etc.

[0034] It should also be noted that the first detection component is equivalent to the limiting device in the prior art; the pulling rope 3 can be but is not limited to a tungsten wire rope.

[0035] It should also be noted that there are multiple specific second positions, but all of them are based on the premise that the second position is higher than the first position.

[0036] In this way, when the first detection component fails, the weight 2 leaves the first position and continues to move toward the second position until the second detection component detects that the weight 2 has reached the second position and generates a detection signal, which is transmitted to the drive and control component. The setting of the second detection device avoids the uncontrollable continuous movement of the weight 2 toward the leveling device 1, which may cause the lifting rope 3 to break, and even damage the entire lifting mechanism, causing economic losses.

[0037] Further, such as Figure 2 and Figure 3 As shown, the single crystal furnace includes a shunt plate 4 arranged on the leveling device 1, and the second detection component includes a conductive member 5 arranged on the shunt plate 4. The weight 2 moved to the second position contacts the conductive member 5 to form an electric circuit and generate a detection signal to control the stop of the lifting rope 3. The conductive member 5 and the weight 2 are both conductors. After the first detection device fails, the weight 2 continues to approach the leveling device 1 until it abuts against the conductive member 5 on the shunt plate 4. The weight 2 and the shunt plate 4 form an electric circuit and form a second detection component. In this way, the weight 2 reaching the second position (referring to the position of the weight 2 when the weight 2 abuts against the shunt plate 4) is detected, and a detection signal is generated. The signal is transmitted to the driving and control component, and the lifting rope 3 stops moving, that is, the weight 2 stops moving. It can be seen that the second detection component is reliable and has a simple structure, which avoids the uncontrollable continuous movement of the weight 2 toward the leveling device 1, resulting in the breakage of the lifting rope 3, and even damage to the entire lifting mechanism, causing economic losses.

[0038] In some optional embodiments, such as Figure 4As shown, the second detection assembly includes a first sensor 6 capable of emitting a light beam and a second sensor 7 capable of receiving a light beam. The first sensor 6 and the second sensor 7 are arranged in alignment, and the weight 2 can pass between the first sensor 6 and the second sensor 7 to block the propagation of the light beam and make the first sensor 6 and / or the second sensor 7 generate a detection signal. When the first detection assembly fails, the weight 2 continues to move upward until it passes between the first sensor 6 and the second sensor 7 arranged in alignment. The weight 2 blocks the light beam between the first sensor 6 and the second sensor 7, and the first sensor 6 and / or the second sensor 7 generate a detection signal, which is transmitted to the control and drive assembly to stop the pulling rope 3 from running, and the weight 2 stops at the second position, thereby avoiding the breaking of the pulling rope 3. It should be noted that the second position where the weight 2 can stop here is at the same height as the position of the light beam emitted by the first sensor 6 and the second sensor 7; the second detection assembly can be, but is not limited to, a beam sensor, that is, one of the first sensor 6 and the second sensor 7 is a transmitter and the other is a receiver; the light beam can be infrared or laser, etc. It can be seen that the second detection component has a simple and reliable structure, can achieve accurate object detection and position control without contact, is easily available in the market, and is low in cost.

[0039] In some optional embodiments, the second detection component includes a proximity switch 8 capable of detecting that the weight 2 moves to the second position. When the weight 2 approaches the proximity switch 8, the proximity switch 8 can quickly detect the weight 2 and send a detection signal, which is transmitted to the control and drive component, so that the weight 2 stops at the second position (referring to the position where the proximity switch 8 detects the weight 2).

[0040] In some optional embodiments, such as Figure 2 and Figure 3 As shown, the leveling device 1 is provided with a sealing joint 9, the conductive member 5 is provided with a wiring terminal 10, the sealing joint 9 is connected to one end of the power supply, the wiring terminal 10 is connected to the other end of the power supply, and the wiring terminal 10 is electrically connected to the sealing joint 9 through a wire 15. One end of the power supply is connected to the wiring terminal 10 on the conductive member 5, and the other end is connected to the sealing joint. When the power supply is turned on, when the weight 2 contacts the conductive member 5, the power supply, the sealing joint 9, the conductive member 5 and the weight 2 form an energized circuit and generate a detection signal, so that the weight 2 can stop at the second position to avoid the pull rope 3 from breaking.

[0041] Furthermore, the leveling device 1 is provided with a clamping member 11, which is used to clamp the sealing joint 9 and the connecting wire 15 of the terminal 10. The setting of the clamping member 11 makes the connecting wire 15 fit under the leveling device 1, thus preventing the wire 15 from hanging in the air or interfering with other components.

[0042] In some optional embodiments, the leveling device 1 is provided with a first sensor 6 and a second sensor 7 facing the direction of the weight 2, and the first sensor 6 and the second sensor 7 are connected to the leveling device 1 through a first connector 12 and a second connector 13, respectively, and are distributed on both sides of the diverter plate 4. The shape of the first connector 12 and the second connector 13 can be, but not limited to, L-shaped, T-shaped, etc. In a certain example, the shape of the first connector 12 and the second connector 13 are both T-shaped, and are fixed to the leveling device 1 by common detachable fasteners such as bolts, that is, the first connector 12 and the second connector 13 are both detachably connected to the leveling device 1. In this way, when the first sensor 6 and the second sensor 7 are damaged, the first sensor 6 and the second sensor 7 can be replaced by disassembling the corresponding connectors, which is beneficial to the maintenance of the protective device and saves costs.

[0043] In some optional embodiments, such as Figure 5 As shown, the leveling device 1 is provided with a proximity switch 8 in the direction of the weight 2, and the proximity switch 8 is connected to the leveling device 1 through a third connecting member 14. The shape of the third connecting member 14 is a regular shape such as a T shape or an L shape, or the shape of the third connecting member 14 is a special shape. The third connecting member 14 and the leveling device 1 are fixed to the leveling device 1 through common fasteners such as bolts, and the third connecting member 14 and the leveling device 1 are detachably connected, which is conducive to the maintenance and replacement of the third connecting member 14 and saves the cost.

[0044] In some optional embodiments, the material of the shunt plate 4 is an insulating material. It should be noted that the shunt plate 4 can be, but is not limited to, an argon shunt plate 4, a nitrogen shunt plate 4, and a helium shunt plate 4. The shunt plate 4 is made of an insulating material, so that a power circuit is formed between the weight 2, the power supply, the conductive member 5, and the sealing joint 9, thereby avoiding the conduction of current to other components, facilitating the production process of single crystals in the single crystal furnace, and improving safety.

[0045] In addition, the embodiment of the present application further provides a single crystal furnace, which includes the above-mentioned protection device. For the beneficial effects of the single crystal furnace brought by the above-mentioned protection device, please refer to the above-mentioned description of the single crystal furnace, which will not be repeated here.

[0046] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0047] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0048] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0049] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0050] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0051] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A protection device, characterized in that: include: A leveling device is arranged at the crystal pulling part of the single crystal furnace; A heavy hammer, connected to the pulling rope of the single crystal furnace and located at the bottom of the leveling device, and can be moved closer to the leveling device when pulled by the pulling rope; A first detection component is disposed in the single crystal furnace and is used to detect the weight reaching the first position; A second detection component is disposed in the single crystal furnace and is used to detect that the weight has reached a second position, and the second position is higher than the first position; The control and drive component is electrically connected to the first detection component and the second detection component to generate a detection signal and stop the pulling rope.

2. The protection device according to claim 1, characterized in that: The single crystal furnace includes a diverter plate arranged on the leveling device, and the second detection component includes a conductive member arranged on the diverter plate. The heavy hammer moved to the second position contacts the conductive member to form an energized circuit and generates the detection signal to control the stopping of the pulling rope.

3. The protection device according to claim 1, characterized in that: The second detection component includes a first sensor capable of emitting a light beam and a second sensor capable of receiving the light beam. The first sensor and the second sensor are aligned with each other, and the weight can pass between the first sensor and the second sensor to block the propagation of the light beam so that the first sensor and / or the second sensor generates the detection signal.

4. The protection device according to claim 1, characterized in that: The second detection assembly includes a proximity switch capable of detecting the weight moving to the second position.

5. The protection device according to claim 2, characterized in that: The leveling device is provided with a sealing joint, the conductive member is provided with a wiring terminal, the sealing joint is connected to one end of the power supply, the wiring terminal is connected to the other end of the power supply, and the wiring terminal is electrically connected to the sealing joint through a wire.

6. The protection device according to claim 5, characterized in that: The leveling device is provided with a clamping piece, and the clamping piece is used to clamp the connecting wire between the sealing joint and the connecting terminal.

7. The protection device according to claim 3, characterized in that: The single crystal furnace includes a diverter plate arranged on the leveling device, and the leveling device is provided with the first sensor and the second sensor in the direction of the weight, and the first sensor and the second sensor are respectively connected to the leveling device through a first connecting member and a second connecting member, and are distributed on both sides of the diverter plate.

8. The protection device according to claim 4, characterized in that: The leveling device is provided with the proximity switch in the direction of the weight, and the proximity switch is connected to the leveling device through a third connecting member.

9. The protection device according to claim 2, characterized in that: The material of the diverter plate is insulating material.

10. A single crystal furnace, characterized in that: The protective device comprises any one of claims 1 to 9.

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