Heavy hammer for single crystal furnace

Abstract

The utility model discloses a heavy hammer for a single crystal furnace. The heavy hammer comprises a body, a balancing weight, a molybdenum pin and an adapter, a group of balancing weights are arranged in the body; the adapter is of a vertically symmetrical structure, and the two ends of the adapter can be clamped to the bottom of the body. And the molybdenum pin transversely penetrates through the bottom of the body, is inserted into the adapter and is used for connecting the adapter with the body. According to the heavy hammer for the single crystal furnace, a separated thread structure is combined with the symmetrical thread design at the two ends, so that the whole heavy hammer is prevented from being scrapped due to damage of the thread ends. The chuck is prevented from being frequently disassembled and assembled in the feeding process, thread abrasion of the chuck is reduced, and the service life of the chuck is prolonged. Friction between the feeder connecting structure and the metal threads of the heavy hammer is avoided, and the risk of metal pollution is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of polysilicon production, and in particular relates to a heavy hammer for a single crystal furnace. Background Art

[0002] The single crystal furnace weight is one of the important components in the single crystal furnace thermal field. Its upper end is connected to the seed crystal rope, and its lower end is connected to the graphite chuck (the seed crystal is installed inside the chuck, and the lower part of the seed crystal is connected to the single crystal silicon rod). Its main function is to stabilize the graphite chuck and the seed crystal to ensure their stable operation. At the same time, the weight can be connected to the secondary feeder to lift the feeder to ensure the smooth secondary feeding. The existing weight is made of high-temperature resistant molybdenum material and is an integrated molding structure with a high procurement cost. After high-temperature baking in the single crystal furnace during later use, it cannot be processed for secondary processing. With the continuous optimization and improvement of the crystal pulling process, the weight of the single crystal silicon rod continues to increase, so the seed crystal rope needs to be thickened. The existing weight is not heavy enough and cannot be used, so it can only be replaced as a whole.

[0003] During secondary feeding, the lower end of the existing weight is connected to the secondary feeder. During secondary feeding, the graphite chuck needs to be unscrewed, and then the secondary feeder connection mechanism is connected to the threaded end of the lower end of the weight. Due to the frequent secondary feeding, the chuck is made of brittle graphite and is threadedly connected to the weight, so the chuck thread is very easy to be damaged. If the damage to the chuck thread is not discovered in time, it is very easy to drop the rod after being assembled with the weight again. The connection method between the weight and the secondary feeder connection mechanism is threaded connection, which is easy to produce metal powder and cause metal pollution. In actual operation, due to the high temperature of the weight, it is difficult and cumbersome to disassemble and assemble the secondary feeder connection mechanism. In addition, the lower part of the existing weight is a single thread structure. Once the thread is damaged, the entire weight will be unusable. Summary of the invention

[0004] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a single crystal furnace weight hammer in view of the deficiencies in the prior art, which can effectively solve the above problems, avoid the occurrence of safety accidents, reduce the use cost of the weight hammer and graphite chuck, and improve production efficiency.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A weight for a single crystal furnace comprises a body, a counterweight, a molybdenum pin and an adapter; the counterweight is a group and is placed inside the body; the adapter is a vertically symmetrical structure, and both ends can be snapped onto the bottom of the body; the molybdenum pin runs transversely through the bottom of the body and is inserted into the adapter to connect the adapter and the body.

[0007] Specifically, the main body comprises a long rod body and a trapezoidal tip at the top; a snap-in groove for the adapter to snap into is reserved at the bottom of the rod body.

[0008] Furthermore, a longitudinal through hole for connecting with a seed crystal rope is provided at the top center of the trapezoidal spire.

[0009] Furthermore, transverse through holes for the molybdenum pins to penetrate are provided on both sides of the clamping groove.

[0010] Furthermore, a receiving cavity for receiving the counterweight is reserved in the rod body.

[0011] Furthermore, a window for taking in and placing the counterweight is provided on the top side of the rod body, and the window is communicated with the accommodating cavity in the rod body.

[0012] Specifically, the adapter comprises two upper and lower clamping joints and a reinforcement block in the middle; the clamping joint and the reinforcement block are connected via a trapezoidal transition block.

[0013] Furthermore, the clamping joint is provided with threads on the outside, and the clamping joint can be connected to the graphite chuck or the secondary feeder connection mechanism through the threads.

[0014] Furthermore, a transverse through groove cooperating with the molybdenum pin is reserved in the center of the clamping joint.

[0015] Furthermore, a sink groove cooperating with the trapezoidal transition block is reserved at the bottom of the main body.

[0016] Compared with the prior art, the utility model has the following beneficial effects.

[0017] (1) The weight for the single crystal furnace adopts a counterweight block and a separate threaded structure design to achieve flexible adjustment of the weight of the weight, avoiding the need for overall replacement due to insufficient weight of the weight.

[0018] (2) The single crystal furnace weight adopts a separate thread structure combined with a symmetrical thread design at both ends, which avoids the overall scrapping of the weight due to damage to the thread end. It avoids frequent disassembly and assembly of the chuck during feeding, reduces the thread wear of the chuck, and increases the service life of the chuck. It avoids friction between the metal threads of the feeder connection structure and the weight, and avoids the risk of metal contamination.

[0019] (3) The heavy hammer used in this single crystal furnace adopts a combined structure, which reduces the difficulty of operation during charging, simplifies installation, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, and the above and / or other advantages of the present invention will become more clear.

[0021] Figure 1 It is a schematic diagram of the overall structure of the heavy hammer used in this single crystal furnace.

[0022] Figure 2 This is a diagram showing the components of the heavy hammer used in this single crystal furnace.

[0023] Figure 3 This is a schematic diagram of the use of the heavy hammer in the crystal pulling process of this single crystal furnace.

[0024] Figure 4 This is a schematic diagram of the use of a heavy hammer in the secondary charging process of the single crystal furnace.

[0025] Wherein, each reference numeral represents:

[0026] 1-main body; 11-rod body; 12-trapezoidal tip; 13-longitudinal through hole; 14-accommodating cavity; 15-opening window; 16-clamping groove; 17-sinking groove; 18-transverse through hole; 2-weight block; 3-molybdenum pin; 4-adapter; 41-clamping joint; 42-reinforcement block; 43-trapezoidal transition block; 44-thread; 45-transverse through groove; 5-seed crystal rope; 6-graphite chuck; 7-seed crystal; 8-monocrystalline silicon rod; 9-secondary feeder connection mechanism; 10-feeder. DETAILED DESCRIPTION

[0027] The present invention can be better understood according to the following embodiments.

[0028] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0029] like Figure 1 and Figure 2 As shown, the weight hammer for a single crystal furnace of the utility model comprises a main body 1, a counterweight block 2, a molybdenum pin 3 and an adapter 4.

[0030] Among them, the counterweight block 2 is a group, and the number is selected according to the needs and placed inside the main body 1; the adapter 4 is a vertically symmetrical structure, and both ends can be snapped into the bottom of the main body 1; the molybdenum pin 3 passes through the bottom of the main body 1 horizontally and is inserted into the adapter 4 to connect the adapter 4 and the main body 1.

[0031] Combination Figure 2The main body 1 includes a long rod body 11 and a trapezoidal tip 12 at the top; a clamping groove 16 for the adapter 4 to be clamped is reserved at the bottom of the rod body 11.

[0032] A longitudinal through hole 13 for connecting with the seed rope 5 is provided at the top center of the trapezoidal tip 12 .

[0033] Transverse through holes 18 for the molybdenum pin 3 to penetrate are provided on both sides of the clamping groove 16 .

[0034] A receiving cavity 14 for receiving the counterweight 2 is reserved in the rod body 11 .

[0035] A window 15 for taking in and placing the counterweight 2 is formed on the top side of the rod body 11 , and the window 15 is communicated with the accommodating cavity 14 in the rod body 11 .

[0036] The adapter 4 includes two upper and lower clamping joints 41 and a reinforcement block 42 in the middle; the clamping joint 41 and the reinforcement block 42 are connected by a trapezoidal transition block 43 .

[0037] The clamping joint 41 is provided with a thread 44 on the outside, and the clamping joint 41 can be connected to the graphite chuck 6 or the secondary feeder connection mechanism 9 through the thread 44. Since the adapter 4 has two clamping joints 41 with the same structure, when one of the clamping joints 41 is worn, it is only necessary to adjust the adapter.

[0038] A transverse through groove 45 which cooperates with the molybdenum pin 3 is reserved in the center of the clamping joint 41 .

[0039] A sink groove 17 is reserved at the bottom of the body 1 to cooperate with the trapezoidal transition block 43 .

[0040] Combination Figure 3 When using the heavy hammer for crystal pulling operation, the upper part of the main body 1 is connected to the seed crystal rope 5, and the counterweight blocks 2 are installed in sequence through the window 15. The number of counterweight blocks 2 can be increased or decreased according to the actual weight of the heavy hammer. The counterweight blocks 2 are made of tungsten alloy with higher density, which can effectively and quickly adjust the weight of the heavy hammer. Without replacing the heavy hammer, the weight of the medium heavy hammer can be flexibly switched quickly.

[0041] Insert the clamping joint 41 at any end of the adapter 4 into the clamping groove 16, and after the transverse through hole 18 and the transverse through groove 45 are concentric, use the molybdenum pin 3 to penetrate the two to achieve the connection between the body 1 and the adapter 4. Before installing the graphite chuck 6, the seed crystal 7 needs to be inserted into the graphite chuck 6 (note that the small end of the seed crystal 7 is inserted downward), and then the internal thread end of the upper part of the graphite chuck 6 is screwed into the thread of the clamping joint 41 at the lower end of the adapter 4. At this point, the assembly is formed as a whole and the crystal pulling operation can be carried out, and a single crystal rod 8 is pulled at the lower end of the seed crystal 7.

[0042] When the thread at the lower end of the adapter 4 is damaged, the molybdenum pin 3 can be pulled out, the adapter 4 can be turned upside down, and then assembled with the body 1. If the threads at the upper and lower ends of the adapter 4 are damaged, the adapter 4 can be replaced. It is precisely because of the symmetrical thread design at both ends of the adapter 4 and the separation structure of the adapter 4 and the body 1 that the entire weight hammer is effectively avoided from being scrapped due to damage to the threaded end of the weight hammer, effectively reducing the cost of using the weight hammer. At the same time, the material of the adapter 4 can also be changed, such as high-purity tungsten, which can also play the role of adjusting the weight of the weight hammer.

[0043] Combination Figure 4 , when secondary feeding is performed, the molybdenum pin 3 is pulled out, so that the adapter 4 and the graphite chuck 6 and seed crystal 7 thereon are completely separated from the body 1. The replacement adapter 4 is inserted into the lower end of the body 1 and fixed with the molybdenum pin 3, and the lower end of the adapter 4 is connected to the secondary feeder connection mechanism 9 and the feeder 10. The adapter 4 and the graphite chuck 6 and seed crystal 7 thereon are removed as a whole as a combination, which avoids the separation of the graphite chuck 6 and the adapter 4, reduces the thread wear of the adapter 4 when the two are frequently disassembled and assembled, and improves the service life of the adapter 4. After the feeding is completed, the molybdenum pin 3 is pulled out, the spare adapter 4 is separated from the body 1, and the combination of the adapter 4 and the graphite chuck 6 and seed crystal 7 thereon is combined with the body 1. There is no need to disassemble and assemble the adapter 4 and the secondary feeder connection mechanism 9, so as to avoid the risk of metal powder generated by the friction of the threads between the two, which causes metal contamination. Through the above two combined structures, it can be flexibly switched only by the molybdenum pin 3, which greatly reduces the difficulty of operation during feeding, simplifies installation, and improves production efficiency.

[0044] The utility model provides a thought and method for a heavy hammer for a single crystal furnace. There are many methods and ways to implement the technical solution. The above is only the preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications should also be regarded as the protection scope of the utility model. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A heavy hammer for a single crystal furnace, characterized in that: The invention comprises a body (1), a counterweight (2), a molybdenum pin (3) and an adapter (4); the counterweight (2) is a group and is placed inside the body (1); the adapter (4) is a vertically symmetrical structure, and both ends can be snap-fitted to the bottom of the body (1); the molybdenum pin (3) passes through the bottom of the body (1) horizontally and is inserted into the adapter (4) to connect the adapter (4) and the body (1).

2. The single crystal furnace weight according to claim 1, characterized in that: The main body (1) comprises a long rod body (11) and a trapezoidal peak (12) at the top; a snap-in groove (16) for snapping the adapter (4) into is reserved at the bottom of the rod body (11).

3. The single crystal furnace weight according to claim 2, characterized in that: A longitudinal through hole (13) for connecting to a seed crystal rope (5) is provided at the top center of the trapezoidal pinnacle (12).

4. The single crystal furnace weight according to claim 2, characterized in that: Transverse through holes (18) for the molybdenum pin (3) to penetrate are provided on both sides of the clamping groove (16).

5. The single crystal furnace weight according to claim 2, characterized in that: A receiving cavity (14) for receiving the counterweight (2) is reserved in the rod body (11).

6. The single crystal furnace weight according to claim 5, characterized in that: A window (15) for taking in and placing the counterweight (2) is provided on the top side of the rod body (11); the window (15) is communicated with the accommodating cavity (14) in the rod body (11).

7. The single crystal furnace weight according to claim 1, characterized in that: The adapter (4) comprises two upper and lower clamping joints (41) and a reinforcement block (42) in the middle; the clamping joint (41) and the reinforcement block (42) are connected via a trapezoidal transition block (43).

8. The single crystal furnace weight according to claim 7, characterized in that: The clamping joint (41) is provided with a thread (44) on the outside, and the clamping joint (41) can be connected to a graphite chuck (6) or a secondary feeder connection mechanism (9) via the thread (44).

9. The single crystal furnace weight according to claim 7, characterized in that: A transverse through groove (45) is reserved at the center of the clamping joint (41) for cooperating with the molybdenum pin (3).

10. The single crystal furnace weight according to claim 7, characterized in that: A sink groove (17) is reserved at the bottom of the body (1) and cooperates with the trapezoidal transition block (43).

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