Supporting structure for gas redistributor of silicon powder receiver

Abstract

The utility model discloses a silicon powder receiver gas redistributor supporting structure which comprises a supporting cone, the inner side face and the outer side face of the supporting cone are smooth inclined faces, and a plurality of circles of through holes distributed in a circular array mode are formed in the supporting cone from inside to outside along the smooth inclined faces. According to the utility model, the normally formed supporting cone is adopted, and the inner side surface and the outer side surface of the supporting cone are smooth inclined surfaces, so that only the through holes need to be formed in the smooth inclined surfaces of the supporting cone during processing; the gas redistributor connecting seat is placed in the through hole and is welded and fixed, and then the gas redistributor is mounted on the gas redistributor connecting seat in a threaded manner, so that the manufacturing cost of the gas redistributor supporting structure is reduced, the manufacturing period of the gas redistributor supporting structure is shortened, and the problem that materials cannot be smoothly taken out due to accumulation is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of silicon powder receivers, and in particular relates to a silicon powder receiver gas redistributor support structure. Background Art

[0002] With the rapid rise of the new energy industry, the market demand for polysilicon products is growing. Currently, polysilicon is mostly produced using trichlorosilane and hydrogen as raw materials at 1050~1150℃ in a reduction furnace, and then dried by a silicon powder receiver.

[0003] To ensure that the silicon powder is in the silicon powder receiver and the high-purity N 2 Full contact, except through N 2 In addition to diffusing nitrogen through the inlet perforated annular tube, it is also necessary to use a gas redistributor to distribute N 2 Diffused to the entire silicon powder receiver, the conventional silicon powder redistributor is supported by an inverted cone-shaped annular stepped structure such as Figure 3 and Figure 4 shown.

[0004] The structure of the conventional support structure determines that the plate material thickness is large, the cone forming size tolerance requirements are extremely high, and the turning processing volume is extremely large during the manufacturing process, resulting in high plate costs, cone forming costs, turning processing costs, etc., resulting in high overall production and manufacturing costs of the equipment, and a long manufacturing cycle, which affects the overall market competitiveness of the product. In addition, the conventional support structure has several circles of annular steps processed on the cone. When the silicon powder receiver stops working, the steps will cause silicon powder to accumulate, which is not conducive to the smooth discharge of silicon powder.

[0005] To this end, we propose a silicon powder receiver gas redistributor support structure. Utility Model Content

[0006] The utility model aims to provide a silicon powder receiver gas redistributor support structure to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a silicon powder receiver gas redistributor support structure, comprising a support cone, the inner and outer side surfaces of the support cone are both smooth inclined surfaces, a plurality of circles of through holes distributed in a circular array from the inside to the outside are opened on the support cone along the smooth inclined surface, a gas redistributor connecting seat is arranged in the through hole, and a gas redistributor is arranged on the gas redistributor connecting seat.

[0008] Preferably, the gas redistributor connection seat and the connection point of the through hole are welded.

[0009] Preferably, the bottom end of the gas redistributor connection seat is arranged on the inner side of the through hole, and the inclination angle of the bottom end of the gas redistributor connection seat is the same as the inclination angle of the bottom of the through hole.

[0010] Preferably, the upper end of the gas redistributor connection seat extends out of the through hole, and the upper end of the gas redistributor connection seat is a plane.

[0011] Preferably, the gas redistributor connecting seat and the gas redistributor are threadedly connected.

[0012] Preferably, the lowermost portion of the support cone is a planar structure, and a discharge port is provided at the lowermost portion of the support cone.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The manufacturing cost (processing, molding and material costs) of the gas redistributor support structure is reduced. Compared with the conventional structure, the total cost of the gas redistributor support structure of the utility model is reduced by about 50-55%. This cost reduction reduces the overall manufacturing cost of the silicon powder receiver by about 20%;

[0015] 2. Due to the optimization of the gas redistributor support structure, the manufacturing cycle of the gas redistributor support structure is shortened by about 50%. This shortened construction period can shorten the overall manufacturing cycle of the silicon powder receiver by 30~40%;

[0016] 3. The improvement of the gas redistributor support structure overcomes the problem of material accumulation that cannot be removed smoothly, which is an urgent problem for customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the support structure of the utility model;

[0018] Figure 2 for Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0019] Figure 3 is a schematic diagram of a conventional silicon powder receiver;

[0020] Figure 4 Schematic diagram of the structure of a conventional gas redistributor support structure.

[0021] In the figure: 1. Support cone; 2. Through hole; 3. Gas redistributor connection seat; 4. Gas redistributor; 5. Discharge port. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 2 The utility model provides a silicon powder receiver gas redistributor support structure, including a support cone 1, the inner and outer side surfaces of the support cone 1 are both smooth inclined surfaces, a plurality of circles of through holes 2 distributed in a circular array are opened on the support cone 1 along the smooth inclined surface from the inside to the outside, a gas redistributor connecting seat 3 is arranged in the through hole 2, the connection between the gas redistributor connecting seat 3 and the through hole 2 is welded, the bottom end of the gas redistributor connecting seat 3 is arranged on the inner side of the through hole 2, and the bottom end inclination angle of the gas redistributor connecting seat 3 is the same as the bottom inclination angle of the through hole 2, the upper end of the gas redistributor connecting seat 3 extends out of the through hole 2, and the upper end of the gas redistributor connecting seat 3 is a plane, a gas redistributor 4 is arranged on the gas redistributor connecting seat 3, the gas redistributor connecting seat 3 and the gas redistributor 4 are threadedly connected, the lowermost part of the support cone 1 is a plane structure, and a discharge port 5 is opened at the lowermost part of the support cone 1.

[0024] In view of the technical problems raised by the background technology, combined with the attached Figure 4 Explanation of the causes of technical problems:

[0025] 1. The minimum thickness S1 at the step of the cone is the thickness required to support the strength calculation of the cone, that is, the thickness S1 can meet the normal support function requirements;

[0026] 2. The main function of the conventional support cone step is to form an annular plane to facilitate the installation of the gas redistributor. However, in order to process the step, the feed thickness of the cone S2≈3S1, that is, the actual feed thickness S2 is 3 times the actual thickness S1 that meets the strength requirement, and the material cost of the support structure increases by 2 times.

[0027] 3. The cost of forming the supporting cone also increases significantly: the market price of the forming cost of the cone is usually positively correlated with the weight of the cone, that is, if the thickness of the cone increases by 2 times, the weight increases by 2 times, and the forming cost also increases by 2 times;

[0028] 4. The forming of the supporting cone is extremely difficult:

[0029] 4.1. The support cone is usually formed by pressing. The thickness of the support cone directly determines the difficulty of forming the support cone. When the angle θ of the support cone is small to a certain extent and the thickness is 3S1, the forming difficulty is higher or it cannot be directly pressed and has to be made of forgings (the material cost is about 3 times that of the plate, and the total material cost increases by about 6 times). The cone forming cycle will be very long and the forming cost will further increase;

[0030] 4.2. The difficulty of forming the support cone is extremely high. This is mainly reflected in the fact that the forming of the support cone requires extremely high roundness tolerance of the planed section of any height of the support cone. However, the pressing forming process of the support cone determines that the roundness tolerance of the support cone forming process objectively exists and the row tolerance cannot be too high. The conventional way to deal with this contradiction is to increase the feed thickness S2 of the support cone to compensate for the forming size tolerance to achieve the purpose of machining the overall step profile. This is the main reason for the increase in feed thickness, material cost and forming cost.

[0031] 5. The machining of the support cone is difficult, has a long cycle and high cost:

[0032] 5.1. The forming accuracy of the support cone cannot be too high, which determines that a lot of time needs to be spent on correction on the lathe before machining the support cone, to find the concentricity of the large and small ports of the support cone, etc.

[0033] 5.2. Although the thickness S2 of the supporting cone is large enough, due to the limitation of the roundness tolerance of the forming, the thickness S1 which plays a role in strength after processing may occasionally be very thin in some parts of the supporting cone, which is much smaller than the actual required thickness and has to be scrapped and remade;

[0034] 5.3. The feed thickness S2 and the turning of a complete step profile determine the long turning cycle, and thus the high turning cost;

[0035] 5.4. After the step processing, the threaded holes for connecting with the gas redistributor need to be processed in the CNC machining center. The number of these threaded holes is usually in the thousands or even tens of thousands, which takes up a long time in the machining center and has a high processing cost. These threaded holes can only be processed after the entire cone is turned, which prolongs the processing and manufacturing cycle of the supporting cone and further prolongs the overall manufacturing cycle of the equipment.

[0036] 6. The step structure supporting the cone determines that when the cone receiver stops, some silicon powder cannot slide smoothly from the step to the bottom of the cone and flow out from the silicon powder outlet.

[0037] To explain the causes of the above technical problems, the utility model improves the gas redistributor:

[0038] The utility model adopts a normally formed support cone 1, and the inner and outer sides of the support cone 1 are both smooth inclined surfaces. During processing, it is only necessary to open a through hole 2 on the smooth inclined surface of the support cone 1, and then put the gas redistributor connection seat 3 into the through hole 2 and weld it, and then the gas redistributor 4 is threadedly installed on the gas redistributor connection seat 3;

[0039] The following adjustments are made to the improved support cone 1 structure:

[0040] 1. The thickness of the supporting cone 1 is directly taken as the strength calculated thickness S1, which reduces the material cost by two thirds;

[0041] 2. The forming tolerance requirement for the support cone 1 is much lowered. Normal forming does not require repeated correction to meet the requirements, which greatly reduces the risk of scrapping caused by unqualified forming tolerances. In addition, the reduced thickness of the support cone 1 is very conducive to the pressing of the support cone 1, reducing the pressing cost by two-thirds and shortening the pressing cycle by 50%;

[0042] 3. There is no need to machine steps inside the supporting cone 1, which saves the machine cost and construction period of the machining process;

[0043] 4. The processing of the added gas redistributor connection seat 3 can be carried out simultaneously with the pressing and drilling process of the support cone 1, further shortening the manufacturing cycle. In addition, the processing of the gas redistributor connection seat 3 can be completed by an ordinary lathe, and does not need to be completed in a processing center with a higher shift fee, saving costs and construction time;

[0044] 5. The step structure is eliminated, which fundamentally solves the problem of silicon powder accumulating on the steps and being unable to slide smoothly to the bottom of the cone for discharge.

[0045] The utility model has the following beneficial effects:

[0046] 1. The manufacturing cost (processing, molding and material costs) of the gas redistributor support structure is reduced. Compared with the conventional structure, the total cost of the gas redistributor support structure of the utility model is reduced by about 50-55%. This cost reduction reduces the overall manufacturing cost of the silicon powder receiver by about 20%;

[0047] 2. Due to the optimization of the gas redistributor support structure, the manufacturing cycle of the gas redistributor support structure is shortened by about 50%. This shortened construction period can shorten the overall manufacturing cycle of the silicon powder receiver by 30~40%;

[0048] 3. The improvement of the gas redistributor support structure overcomes the problem of material accumulation that cannot be removed smoothly, which is an urgent problem for customers.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silicon powder receiver gas redistributor support structure, It is characterized in that The invention comprises a support cone (1), wherein both inner and outer side surfaces of the support cone (1) are smooth inclined surfaces, and the support cone (1) is provided with a plurality of through holes (2) distributed in a circular array from the inside to the outside along the smooth inclined surface, and a gas redistributor connection seat (3) is arranged in the through holes (2), and a gas redistributor (4) is arranged on the gas redistributor connection seat (3).

2. A silicon powder receiver gas redistributor support structure according to claim 1, Features: The gas redistributor connection seat (3) and the through hole (2) are connected by welding at the connection point.

3. A silicon powder receiver gas redistributor support structure according to claim 1, Features: The bottom end of the gas redistributor connection seat (3) is arranged on the inner side of the through hole (2), and the inclination angle of the bottom end of the gas redistributor connection seat (3) is the same as the inclination angle of the bottom of the through hole (2).

4. A silicon powder receiver gas redistributor support structure according to claim 3, Features: The upper end of the gas redistributor connection seat (3) extends out of the through hole (2), and the upper end of the gas redistributor connection seat (3) is a plane.

5. A silicon powder receiver gas redistributor support structure according to claim 1, Features: The gas redistributor connection seat (3) and the gas redistributor (4) are threadedly connected.

6. A silicon powder receiver gas redistributor support structure according to claim 1, Features: The lowermost portion of the support cone (1) is a planar structure, and a discharge port (5) is provided at the lowermost portion of the support cone (1).

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