Inner bottom cone feeder

Abstract

The utility model discloses an inner bottom cone feeder which comprises a feeding barrel, a bottom cone, a limiting flange, a flange cross beam, a feeding barrel cross beam and a lifting rod, the bottom cone of a spindle-shaped structure is matched with the funnel-shaped inner wall of the bottom of the feeding barrel to control opening and closing of the feeding barrel, the flange cross beam is connected with the limiting flange, and the limiting flange is not connected with the feeding barrel. The material barrel beam is connected with the feeding barrel, and the lifting rod is connected with the base cone and the flange beam. When the charging barrel descends but the bottom cone does not move and the feeding channel is opened, the granular silicon material can vertically flow out downwards along the central hole of the charging barrel without being blocked by foreign matters in the falling process, so that the scattering range of the granular silicon material is minimum; the charging bucket beam and the flange beam are vertically nested in parallel, so that a charging window at the upper part of the charging bucket can be ensured to be maximum; the charging basket cross beam and the flange cross beam are arranged in parallel in an up-and-down nested mode, and relative rotation of the charging basket cross beam and the flange cross beam can be limited.

Description

Technical Field

[0001] The utility model relates to the field of single crystal silicon production equipment, and more specifically, to an inner bottom cone feeder. Background Art

[0002] Polysilicon is the raw material used to prepare single crystal silicon rods or polycrystalline silicon ingots. It is the basic raw material of the current photovoltaic industry chain dominated by silicon-based solar cells. Common types of polysilicon raw materials are rod-shaped silicon and granular silicon. Granular silicon is produced using the silane fluidized bed process. Because of its obvious cost advantage, it is increasingly used in the photovoltaic industry. However, due to the light weight of granular silicon, the bottom cone of the feeder and the barrel form a cavity for loading granular silicon materials. When used in the feeding link, the granular silicon materials are first poured into the feeder, and then the feeder is lifted into the single crystal furnace, and the feeder is lowered to a fixed position. The lifting rod of the feeder drives the bottom cone to descend, and the bottom cone and the barrel form a discharge port. When the granular silicon materials are sprinkled into the quartz crucible, the feeding operation is completed. However, the granular silicon is prone to flying during the descent process and adheres to the inner wall of the furnace, making the crystal pulling process difficult.

[0003] Therefore, there is an urgent need to provide a feeder that can prevent granular silicon from generating dust. Utility Model Content

[0004] In view of this, the utility model provides an inner bottom cone feeder. When the inner bottom cone feeder is working, granular silicon material is dropped vertically downward from the center of the feeding barrel into the single crystal furnace, so as to keep the dispersion range of the granular silicon material to a minimum, minimize the influence of argon blowing, and reduce the problem of dust generated by the granular silicon during the feeding process.

[0005] The inner bottom cone feeder provided by the utility model comprises:

[0006] A feeding bucket, the bottom of which includes a funnel-shaped inner wall;

[0007] The bottom cone is a spindle-shaped structure, which matches the funnel-shaped inner wall;

[0008] The limiting flange is sleeved on the outside of the feeding barrel and is not connected to the feeding barrel;

[0009] The flange crossbeam comprises a first beam, a second beam and a third beam connected in sequence, the first beam and the third beam are respectively connected to the limiting flange, and the height of the first beam along the first direction is greater than the distance from the limiting flange to the top of the feeding bucket, and the first direction is the direction from the top of the feeding bucket to the bottom of the feeding bucket;

[0010] The bucket cross beam comprises a first arm, a second arm and a third arm connected in sequence, the first arm and the third arm are respectively connected to the top of the feeding bucket, the first arm and the third arm comprise a hollow area, the second arm is located on a side of the second beam away from the feeding bucket, and the first beam and the third beam penetrate the hollow area;

[0011] One end of the lifting rod is connected to the bottom cone, and the other end passes through the second beam and the second arm in sequence and is connected to the screw rod, and the lifting rod is fixedly connected to the second beam.

[0012] Optionally, along the first direction, the wall thickness of the bottom of the feeding barrel gradually increases.

[0013] Optionally, the spindle-shaped structure includes a first part and a second part, the first part is located on a side of the second part close to the bottom of the feeding bucket, and the outer contour of the first part matches the funnel-shaped inner wall.

[0014] Optionally, along the first direction, the width of the first portion along the second direction gradually decreases, the width of the second portion along the second direction gradually increases, and the second direction intersects with the first direction.

[0015] Optionally, the minimum width of the first portion along the second direction is k1, the minimum width of the second portion along the second direction is k2, and k1>k2.

[0016] Optionally, the first arm and the third arm both include a first support arm and a second support arm, the first support arm is connected to the material barrel, the second support arm is connected to the second arm, and the angle between the first support arm and the second support arm is greater than 90°.

[0017] Optionally, the first arm and the second arm both include a hollow area, and the hollow area of ​​the first arm is connected to the hollow area of ​​the second arm.

[0018] Optionally, the centerline position of the bottom cone includes a through hole penetrating the bottom cone, the bottom end of the lifting rod passes through the through hole, and the lifting rod is fastened by a nut.

[0019] Optionally, the lifting rod and the second beam are fastened and connected via nuts or welded.

[0020] Compared with the prior art, the inner bottom cone feeder provided by the utility model achieves at least the following beneficial effects:

[0021] The inner bottom cone feeder of the utility model opens the feeding channel by lowering the feeding barrel while keeping the bottom cone still, which can ensure that the granular silicon material flows vertically downward along the central hole of the feeding barrel, and there is no foreign matter blocking the falling process, ensuring that the scattering range of the silicon material is minimized;

[0022] The inner bottom cone feeder of the utility model has a feeding barrel with a funnel-shaped inner wall at the bottom, and the bottom cone is a spindle-shaped structure, which matches the funnel-shaped inner wall. The relative position between the spindle-shaped structure of the bottom cone and the funnel-shaped inner wall at the bottom of the feeding barrel controls the opening and closing of the feeding barrel.

[0023] The inner bottom cone feeder of the utility model comprises a barrel crossbeam and a flange crossbeam, the flange crossbeam comprises a first beam, a second beam and a third beam connected in sequence, the first beam and the third beam are respectively connected to the limiting flange, and the height of the first beam along the first direction is greater than the distance from the limiting flange to the top of the feeding barrel, and the first direction is the direction from the top of the feeding barrel to the bottom of the feeding barrel; the barrel crossbeam comprises a first arm, a second arm and a third arm connected in sequence, the first arm and the third arm are respectively connected to the top of the feeding barrel, the first arm and the third arm comprise a hollow area, the second arm is located on the side of the second beam away from the feeding barrel, the first beam and the third beam penetrate the hollow area, the barrel crossbeam and the flange crossbeam are arranged in parallel and nested up and down, which can ensure that the loading window at the top of the barrel is the largest;

[0024] The inner bottom cone feeder of the utility model comprises a barrel crossbeam and a flange crossbeam, and the barrel crossbeam and the flange crossbeam are arranged in parallel and nested up and down, so that the relative rotation of the barrel crossbeam and the flange crossbeam can be restricted.

[0025] Of course, any product implementing the present utility model does not necessarily need to achieve all of the above-mentioned technical effects at the same time.

[0026] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0028] Figure 1 It is a three-dimensional structural schematic diagram of an inner bottom cone feeder provided by the utility model;

[0029] Figure 2 It is a structural schematic diagram of an inner bottom cone feeder provided by the utility model;

[0030] Figure 3 This is a charging effect diagram of the inner bottom cone feeder provided by the utility model;

[0031] Figure 4 This is a feeding effect diagram of the inner bottom cone feeder provided by the utility model;

[0032] Figure 5 It is a cross-sectional view of a bottom cone provided by the utility model;

[0033] Figure 6 yes Figure 2 A partial view of the top of the mid-bottom cone feeder. DETAILED DESCRIPTION

[0034] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0036] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0037] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0038] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] Reference Figures 1 to 4 , Figure 1 This is a three-dimensional structural diagram of an inner bottom cone feeder provided by the utility model. Figure 2 This is a structural schematic diagram of an inner bottom cone feeder provided by the utility model. Figure 3 This is a charging effect diagram of the inner bottom cone feeder provided by the utility model. Figure 4 This is a feeding effect diagram of the inner bottom cone feeder provided by the utility model. Figures 1 to 4 As shown, the inner bottom cone feeder 100 provided in this embodiment includes:

[0040] A feeding barrel 1, the bottom of which includes a funnel-shaped inner wall 101;

[0041] The bottom cone 2 is a spindle-shaped structure, and the spindle-shaped structure matches the funnel-shaped inner wall 101;

[0042] The limiting flange 4 is sleeved on the outside of the feeding barrel 1 and is not connected to the feeding barrel 1;

[0043] The flange cross beam 5 includes a first beam 51, a second beam 52 and a third beam 53 connected in sequence, the first beam 51 and the third beam 53 are respectively connected to the limiting flange 4, and the height of the first beam 51 along the first direction X is greater than the distance from the limiting flange 4 to the top of the feeding bucket 1, and the first direction X is the direction from the top of the feeding bucket 1 to the bottom of the feeding bucket 1;

[0044] The bucket cross beam 6 includes a first arm 61, a second arm 62 and a third arm 63 connected in sequence, the first arm 61 and the third arm 63 are respectively connected to the top of the charging bucket 1, the first arm 61 and the third arm 63 include a hollow area 7, the second arm 62 is located on the side of the second beam 52 away from the charging bucket 1, and the first beam 51 and the third beam 53 pass through the hollow area 7;

[0045] One end of the lifting rod 3 is connected to the bottom cone 2 , and the other end passes through the second beam 52 and the second arm 62 in sequence and then is connected to the screw rod 8 , and the lifting rod 3 is fixedly connected to the second beam 52 .

[0046] Specifically, the feeding barrel 1 extends in the up and down directions, and the feeding barrel 1 is a hollow cylinder with a material storage space. The bottom of the feeding barrel 1 has a funnel-shaped inner wall 101. The funnel-shaped inner wall 101 here means that the wall thickness of the bottom of the feeding barrel gradually thickens along the direction from the top of the feeding barrel 1 to the bottom of the feeding barrel 1, so that a funnel-shaped opening is formed at the bottom of the feeding barrel 1.

[0047] The bottom of the feeding barrel 1 is provided with a bottom cone 2, which is a spindle-shaped structure. The spindle-shaped structure matches the funnel-shaped inner wall 101. The matching here means that the lower part of the spindle-shaped structure has an inclined surface, such as Figure 2 and Figure 3 As shown, the bottom cone 2 fits with the funnel-shaped inner wall 101 at the bottom of the charging barrel 1, so that there is no gap between the lower part of the spindle-shaped structure and the funnel-shaped inner wall 101, thus controlling the closing of the bottom of the charging barrel 1. The bottom cone 2 remains stationary, and the charging barrel 1 moves downward, so that there is a gap between the lower part of the spindle-shaped structure and the funnel-shaped inner wall 101, thus controlling the opening of the bottom of the charging barrel 1. The relative position between the spindle-shaped structure of the bottom cone 2 and the funnel-shaped inner wall 101 at the bottom of the charging barrel 1 controls the opening and closing of the charging barrel 1.

[0048] The limiting flange 4 is sleeved on the outside of the feeding barrel 1, but is not connected to the feeding barrel 1, that is, when the position of the limiting flange 4 is fixed, the feeding barrel 1 can also move in the first direction X. In the prior art, the limiting flange 4 and the feeding barrel 1 are connected together. When the limiting flange 4 is located on the step inside the single crystal furnace table, the feeding barrel 1 stops moving because the limiting flange 4 and the feeding barrel 1 are fixedly connected. In this embodiment, since the limiting flange 4 is not connected to the feeding barrel 1 and is only sleeved on the outside of the feeding barrel 1, when the limiting flange 4 is located on the step inside the single crystal furnace table, the feeding barrel 1 can still move in the first direction X, such as Figure 4 As shown, if the feeding bucket 1 moves upward and the bottom cone 2 remains in position, there will be a gap between the funnel-shaped inner wall 101 at the bottom of the feeding bucket 1 and the lower part of the spindle-shaped structure, and the granular silicon material 9 will flow out from this gap to achieve feeding. Figure 3As shown, if the limiting flange 4 is located on the step inside the single crystal furnace platform, the positions of the feeding barrel 1 and the bottom cone 2 remain unchanged, and there is no gap between the lower part of the spindle-shaped structure and the funnel-shaped inner wall 101, the bottom of the feeding barrel 1 is controlled to be closed, and no feeding is carried out at this time.

[0049] The flange cross beam 5 includes a first beam 51, a second beam 52 and a third beam 53 connected in sequence. The first beam 51 and the third beam 53 are respectively connected to the limiting flange 4. The first beam 51, the second beam 52 and the third beam 53 form an inverted U-shaped structure. The first beam 51 and the third beam 53 extend along the first direction X. The first direction X is the direction from the top of the feeding bucket 1 to the bottom of the feeding bucket 1. The two ends of the second beam 52 are respectively connected to the first beam 51 and the third beam 53, and the second beam 52 extends along the second direction Y. The second direction Y is the horizontal direction. The second direction Y intersects with the first direction X. The length of the second beam 52 along the second direction Y is equal to the diameter of the limiting flange 4. Of course, the spacing between the first beam 51 and the third beam 53 along the second direction Y is equal to the diameter of the limiting flange 4. When there is no gap between the lower part of the spindle-shaped structure and the funnel-shaped inner wall 101, the height of the first beam 51 along the first direction X is greater than the distance from the limiting flange 4 to the top of the feeding bucket 1, that is, when the feeding bucket 1 remains in a closed state, the first beam 51 is higher than the top of the feeding bucket 1, and there is a certain distance between the first beam 51 and the top of the feeding bucket 1.

[0050] The bucket cross beam 6 includes a first arm 61, a second arm 62 and a third arm 63 connected in sequence. The first arm 61 and the third arm 63 are respectively connected to the top of the feeding bucket 1. The first arm 61, the second arm 62 and the third arm 63 form an inverted U-shaped structure. The first arm 61 and the third arm 63 extend along the first direction X. The two ends of the second arm 62 are respectively connected to the first arm 61 and the third arm 63, and the second arm 62 extends along the second direction Y. The bucket cross beam 6 and the flange cross beam 5 are arranged in parallel. The overall length of the bucket cross beam 6 along the second direction Y is equal to the diameter of the feeding bucket 1 to ensure that it is fixedly connected to the top of the feeding bucket 1. Figure 1 As shown, the first arm 61 and the third arm 63 include a hollow area 7, the second arm 62 is located on the side of the second beam 52 away from the feeding barrel 1, and the first beam 51 and the third beam 53 pass through the hollow area 7. In other words, the second arm 62 is higher than the second beam 52. Since the bottom end of the first beam 51 is lower than the bottom end of the first arm 61, and the bottom end of the third beam 53 is lower than the bottom end of the third arm 63, the first beam 51 must pass through the hollow area 7 of the first arm 61, and the third beam 53 must pass through the hollow area 7 of the third arm 63. Therefore, the stroke of the second beam 52 in the first direction X is the height of the entire hollow area 7 in the first direction X, that is, the height of the hollow area 7 limits the distance that the second beam 52 moves in the first direction X.

[0051] The bottom end of the lifting rod 3 is connected to the bottom cone 2, and the top end of the lifting rod 3 passes through the second beam 52 and the second arm 62 in sequence and is connected to the screw rod 8, and the lifting rod 3 is fixedly connected to the second beam 52, that is, when the lifting rod 3 is fixed, the second beam 52 is also fixed, and the lifting rod 3 and the feeding barrel 1 move relative to each other, then the second beam 52 and the barrel cross beam 6 fixed on the feeding barrel 1.

[0052] It is understandable that if the height of the hollow area 7 in the first direction X is too large, the overall strength of the bucket cross beam 6 will be reduced, and repeatedly lifting the inner bottom cone feeder 100 will reduce its life. If the height of the hollow area 7 in the first direction X is too small, the height of the hollow area 7 limits the distance that the second beam 52 moves in the first direction X. Since the lifting rod 3 is fixedly connected to the second beam 52, it determines the maximum distance that the lifting rod 3 can move relative to the feeding bucket 1. If the height of the hollow area 7 is too small, the moving distance of the second beam 52 along the first direction X is too small, and the space for the feeding bucket 1 to descend relative to the lifting rod 3 is too small, and the bottom of the feeding bucket 1 cannot be fully opened, which reduces the feeding speed and affects the production rhythm.

[0053] The working process of the inner bottom cone feeder 100 of this embodiment is as follows: the inner bottom cone feeder 100 is placed vertically. Under the action of gravity, the bottom cone 2 of the spindle-shaped structure is pressed against the funnel-shaped inner wall 101 at the bottom of the feeding barrel 1 to keep the bottom of the feeding barrel 1 sealed to prevent silicon material from leaking out. The granular silicon material 9 is added from the top of the feeding barrel 1. The state of the granular silicon material 9 being filled is as shown in FIG. Figure 3 As shown. After being filled with granular silicon material 9, it is connected to the furnace table of the single crystal furnace through the screw 8. The furnace table lifts the feeder through the barrel beam 6. Under the action of gravity, the bottom cone 2 of the spindle-shaped structure is pressed against the funnel-shaped inner wall 101 at the bottom of the feeding barrel 1 to keep the bottom of the feeding barrel 1 sealed. After entering the furnace table, the inner bottom cone feeder 100 is slowly lowered, and the limiting flange 4 is stuck by the internal steps of the furnace table. At the same time, the flange beam 5, the lifting rod 3, and the bottom cone 2 stop descending together. The feeding barrel 1 continues to descend under the action of gravity. At this time, the contact surface between the feeding barrel 1 and the bottom cone 2 is separated, and there is a gap between the lower part of the spindle-shaped structure and the funnel-shaped inner wall 101. The granular silicon material 9 slides down from the gap between the feeding barrel 1 and the bottom cone 2, as shown. Figure 4 As shown, it falls vertically into the crucible (not shown) in the furnace along the central hole of the charging barrel 1.

[0054] Compared with the related art, the inner bottom cone feeder 100 of this embodiment has at least the following beneficial effects:

[0055] The inner bottom cone feeder 100 of this embodiment opens the feeding channel by lowering the feeding barrel 1 but keeping the bottom cone 2 stationary, which can ensure that the granular silicon material 9 flows vertically downward along the central hole of the feeding barrel 1, and there is no foreign matter blocking the falling process, ensuring that the silicon material scattering range is minimized;

[0056] The inner bottom cone feeder 100 of this embodiment has a bottom of a feeding barrel 1 including a funnel-shaped inner wall 101, and a bottom cone 2 having a spindle-shaped structure, the spindle-shaped structure matches the funnel-shaped inner wall 101, and the relative position between the spindle-shaped structure of the bottom cone 2 and the funnel-shaped inner wall 101 at the bottom of the feeding barrel 1 controls the opening and closing of the feeding barrel 1.

[0057] The inner bottom cone feeder 100 of this embodiment includes a barrel crossbeam 6 and a flange crossbeam 5, the flange crossbeam 5 includes a first beam 51, a second beam 52 and a third beam 53 connected in sequence, the first beam 51 and the third beam 53 are respectively connected to the limiting flange 4, and the height of the first beam 51 along the first direction X is greater than the distance from the limiting flange 4 to the top of the feeding barrel 1, and the first direction X is the direction from the top of the feeding barrel 1 to the bottom of the feeding barrel 1; the barrel crossbeam 6 includes a first arm 61, a second arm 62 and a third arm 63 connected in sequence, the first arm 61 and the third arm 63 are respectively connected to the top of the feeding barrel 1, the first arm 61 and the third arm 63 include a hollow area 7, the second arm 62 is located on the side of the second beam 52 away from the feeding barrel 1, the first beam 51 and the third beam 53 pass through the hollow area 7, the barrel crossbeam 6 and the flange crossbeam 5 are arranged in parallel and nested up and down, which can ensure that the loading window at the top of the barrel is the largest;

[0058] The inner bottom cone feeder 100 of this embodiment includes a barrel crossbeam 6 and a flange crossbeam 5 , and the barrel crossbeam 6 and the flange crossbeam 5 are arranged to be nested in parallel up and down, which can limit the relative rotation of the barrel crossbeam 6 and the flange crossbeam 5 .

[0059] In some optional embodiments, continue to refer to Figures 2 to 4 Along the first direction X, the wall thickness of the bottom of the feeding barrel 1 gradually increases.

[0060] Along the direction from the top of the feeding barrel 1 to the bottom of the feeding barrel 1, that is, in the first direction X, the wall thickness of the bottom of the feeding channel gradually thickens, so that the bottom of the feeding barrel 1 forms a smooth funnel-shaped opening, and the spindle-shaped structure of the bottom cone 2 matches the funnel-shaped inner wall 101, and fits with the funnel-shaped inner wall 101 at the bottom of the feeding barrel 1, so that there is no gap between the lower part of the spindle-shaped structure and the funnel-shaped inner wall 101, and the closing of the bottom of the feeding barrel 1 can be controlled. The bottom cone 2 remains stationary, and the feeding barrel 1 moves downward, so that there is a gap between the lower part of the spindle-shaped structure and the funnel-shaped inner wall 101, so as to control the opening of the bottom of the feeding barrel 1. The relative position between the spindle-shaped structure of the bottom cone 2 and the funnel-shaped inner wall 101 at the bottom of the feeding barrel 1 controls the opening and closing of the feeding barrel 1.

[0061] In some optional embodiments, continue to refer to Figures 2 to 4 The spindle-shaped structure includes a first portion 21 and a second portion 22 . The first portion 21 is located on a side of the second portion 22 close to the bottom of the feeding barrel 1 , and the outer contour of the first portion 21 matches the funnel-shaped inner wall 101 .

[0062] Specifically, the first part 21 is the lower part of the bottom cone 2, and the second part 22 is the upper part of the bottom cone 2. The first part 21 is located on the side of the second part 22 close to the bottom of the charging bucket 1, so it is the first part 21 that can match the funnel-shaped interior of the bottom of the charging bucket 1, and the outer contour of the first part 21 matches the funnel-shaped inner wall 101. The matching here means that the first part 21 of the spindle-shaped structure has an inclined surface, and the inclined surface fits the funnel-shaped inner wall 101 at the bottom of the charging bucket 1. There is no gap between the first part 21 of the spindle-shaped structure and the funnel-shaped inner wall 101, which controls the closing of the bottom of the charging bucket 1. The bottom cone 2 remains stationary, and the charging bucket 1 moves downward, so that there is a gap between the first part 21 of the spindle-shaped structure and the funnel-shaped inner wall 101, so as to control the opening of the bottom of the charging bucket 1. The relative position between the spindle-shaped structure of the bottom cone 2 and the funnel-shaped inner wall 101 at the bottom of the charging bucket 1 controls the opening and closing of the charging bucket 1.

[0063] In some optional embodiments, continue to refer to Figures 2 to 4 Along the first direction X, the width of the first portion 21 along the second direction Y gradually decreases, and the width of the second portion 22 along the second direction Y gradually increases, and the second direction Y intersects with the first direction X.

[0064] In this embodiment, the second part 22 is on the top and the first part 21 is on the bottom. Along the first direction X, the spindle-shaped structure means that the width along the second direction Y increases first and then decreases. The width of the second part 22 along the second direction Y gradually increases, that is, the top of the second part 22 is narrower, which can minimize the volume of the bottom cone 2, thereby reducing the space occupied by the bottom cone 2 in the feeding bucket 1, and increasing the amount of granular silicon material 9 that can be accommodated in the feeding bucket 1. The width of the first part 21 along the second direction Y gradually decreases, which can ensure matching with the funnel-shaped inner wall 101, and the fit to the funnel-shaped inner wall 101 ensures that the feeding bucket 1 is sealed and no granular silicon material 9 leaks out.

[0065] In some optional embodiments, continue to refer to Figure 3 , Figure 4 And reference Figure 5 , Figure 5 It is a cross-sectional view of a bottom cone provided by the utility model, the minimum width of the first portion 21 along the second direction Y is k1, the minimum width of the second portion 22 along the second direction Y is k2, and k1>k2.

[0066] Figure 5 The bottom cone 2 is not pattern-filled, and the first portion 21 and the second portion 22 are distinguished by a dotted line.

[0067] k1>k2, so that the top of the second part 22 can be made as narrow as possible, so that the volume of the bottom cone 2 can be minimized, thereby reducing the space occupied by the bottom cone 2 in the feeding bucket 1, and increasing the amount of granular silicon material 9 that can be accommodated in the feeding bucket 1. The first part 21 needs to match with the funnel-shaped inner wall 101 to make the feeding bucket 1 round. If the minimum width of the first part 21 is too small, it cannot be guaranteed to fit with the funnel-shaped inner wall 101, resulting in the leakage of granular silicon material 9 when the material is not discharged.

[0068] In this embodiment, the minimum width k1 of the first part 21 along the second direction Y is greater than the minimum width k2 of the second part 22 along the second direction Y, which can not only minimize the volume of the bottom cone 2 and increase the amount of granular silicon material 9 that can be accommodated in the feeding bucket 1, but also ensure that the first part 21 fits well with the funnel-shaped inner wall 101, ensuring that the feeding bucket 1 is sealed and no granular silicon material 9 leaks out.

[0069] In some optional embodiments, continue to refer to Figure 1 And reference Figure 6 , Figure 6 yes Figure 2 A partial view of the top of the middle inner bottom cone feeder, the first arm 61 and the third arm 63 both include a first arm 601 and a second arm 602, the first arm 601 is connected to the barrel, the second arm 602 is connected to the second arm 62, and the angle between the first arm 601 and the second arm 602 is greater than 90°.

[0070] It can be understood that the first arm 61 and the third arm 63 are symmetrically arranged, and both include a first arm 601 and a second arm 602. The angle between the first arm 601 and the second arm 602 is greater than 90°. This can reduce the length of the second arm 62 on the one hand, thereby ensuring the strength of the barrel beam 6. Moreover, the angle between the first arm 601 and the second arm 602 is greater than 90°, which can also ensure the strength of the first arm 61 and the third arm 63 while ensuring the height of the hollow area 7 in the second direction Y.

[0071] In some optional embodiments, continue to refer to Figure 1 The first arm 601 and the second arm 602 both include a hollow area 7, and the hollow area 7 of the first arm 601 is connected to the hollow area 7 of the second arm 602.

[0072] The hollow area 7 of the first arm 601 is connected to the hollow area 7 of the second arm 602, forming an overall large hollow area 7 of the first arm 61 and an overall large hollow area 7 of the third arm 63. The first beam 51 must pass through the hollow area 7 of the first arm 61, and the third beam 53 must pass through the hollow area 7 of the third arm 63. Therefore, the travel of the second beam 52 in the first direction X is the height of the entire hollow area 7 in the first direction X, that is, the height of the hollow area 7 limits the distance that the second beam 52 moves in the first direction X.

[0073] In some optional embodiments, continue to refer to Figure 5 The centerline position of the bottom cone 2 includes a through hole that penetrates the bottom cone 2, the bottom end of the lifting rod 3 penetrates the through hole, and the lifting rod 3 is fastened by a nut.

[0074] Specifically, the center line of the bottom cone 2 extends along the first direction X and coincides with the center line of the lifting rod 3. The center line position of the bottom cone 2 includes a through hole, and the bottom end of the lifting rod 3 is inserted into the through hole. A nut is provided at the bottom of the bottom cone 2 to fasten the lifting rod 3, thereby realizing a fixed connection between the lifting rod 3 and the bottom cone 2.

[0075] In some optional embodiments, continue to refer to Figure 1 The lifting rod 3 and the second beam 52 are fastened and connected by nuts or welded.

[0076] Specifically, Figure 1 The lifting rod 3 is connected to the second beam 52 by a nut, and optionally, the lifting rod 3 and the second beam 52 can also be connected by welding. The upper end of the limit flange 4 is connected to the second beam 52 of the flange beam 5, and the second beam 52 of the flange beam 5 is connected to the lifting rod 3, so the limit flange 4 and the lifting rod 3 are indirectly fastened. During the feeding process, after the inner bottom cone feeder 100 enters the furnace, the inner bottom cone feeder 100 is slowly lowered, and the limit flange 4 is stuck by the internal step of the furnace, and the flange beam 5, the lifting rod 3, and the bottom cone 2 stop descending together. The feeding barrel 1 continues to descend under the action of gravity. At this time, the contact surface of the feeding barrel 1 and the bottom cone 2 is separated, and there is a gap between the lower part of the spindle-shaped structure and the funnel-shaped inner wall 101, and the granular silicon material 9 slides down from the gap between the feeding barrel 1 and the bottom cone 2, and falls vertically into the crucible in the furnace along the center hole of the feeding barrel 1.

[0077] It can be seen from the above embodiments that the inner bottom cone feeder provided by the utility model achieves at least the following beneficial effects:

[0078] The inner bottom cone feeder of the utility model opens the feeding channel by lowering the feeding barrel while keeping the bottom cone still, which can ensure that the granular silicon material flows vertically downward along the central hole of the feeding barrel, and there is no foreign matter blocking the falling process, ensuring that the scattering range of the silicon material is minimized;

[0079] The inner bottom cone feeder of the utility model has a feeding barrel with a funnel-shaped inner wall at the bottom, and the bottom cone is a spindle-shaped structure, which matches the funnel-shaped inner wall. The relative position between the spindle-shaped structure of the bottom cone and the funnel-shaped inner wall at the bottom of the feeding barrel controls the opening and closing of the feeding barrel.

[0080] The inner bottom cone feeder of the utility model comprises a barrel crossbeam and a flange crossbeam, the flange crossbeam comprises a first beam, a second beam and a third beam connected in sequence, the first beam and the third beam are respectively connected to the limiting flange, and the height of the first beam along the first direction is greater than the distance from the limiting flange to the top of the feeding barrel, and the first direction is the direction from the top of the feeding barrel to the bottom of the feeding barrel; the barrel crossbeam comprises a first arm, a second arm and a third arm connected in sequence, the first arm and the third arm are respectively connected to the top of the feeding barrel, the first arm and the third arm comprise a hollow area, the second arm is located on the side of the second beam away from the feeding barrel, the first beam and the third beam penetrate the hollow area, the barrel crossbeam and the flange crossbeam are arranged in parallel and nested up and down, which can ensure that the loading window at the top of the barrel is the largest;

[0081] The inner bottom cone feeder of the utility model comprises a barrel crossbeam and a flange crossbeam, and the barrel crossbeam and the flange crossbeam are arranged in parallel and nested up and down, so that the relative rotation of the barrel crossbeam and the flange crossbeam can be restricted.

[0082] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An inner bottom cone feeder, characterized in that: include: A feeding bucket, wherein the bottom of the feeding bucket includes a funnel-shaped inner wall; A bottom cone, wherein the bottom cone is a spindle-shaped structure, and the spindle-shaped structure matches the funnel-shaped inner wall; A limiting flange is sleeved on the outside of the feeding barrel and is not connected to the feeding barrel; The flange cross beam comprises a first beam, a second beam and a third beam connected in sequence, wherein the first beam and the third beam are respectively connected to the limiting flange, and the height of the first beam along the first direction is greater than the distance from the limiting flange to the top of the feeding bucket, and the first direction is the direction from the top of the feeding bucket to the bottom of the feeding bucket; A bucket crossbeam, comprising a first arm, a second arm and a third arm connected in sequence, wherein the first arm and the third arm are respectively connected to the top of the charging bucket, the first arm and the third arm include a hollow area, the second arm is located on a side of the second beam away from the charging bucket, and the first beam and the third beam pass through the hollow area; A lifting rod has one end connected to the bottom cone and the other end passing through the second beam and the second arm in sequence and then connected to the screw rod, and the lifting rod is fixedly connected to the second beam.

2. The inner bottom cone feeder according to claim 1, characterized in that: Along the first direction, the wall thickness of the bottom of the feeding bucket gradually increases.

3. The inner bottom cone feeder according to claim 1, characterized in that: The spindle-shaped structure includes a first part and a second part, wherein the first part is located on a side of the second part close to the bottom of the feeding bucket, and the outer contour of the first part matches the funnel-shaped inner wall.

4. The inner bottom cone feeder according to claim 3, characterized in that: Along the first direction, the width of the first portion along a second direction gradually decreases, the width of the second portion along the second direction gradually increases, and the second direction intersects the first direction.

5. The inner bottom cone feeder according to claim 4, characterized in that: The minimum width of the first portion along the second direction is k1, the minimum width of the second portion along the second direction is k2, and k1>k2.

6. The inner bottom cone feeder according to claim 1, characterized in that: The first arm and the third arm both include a first support arm and a second support arm, the first support arm is connected to the bucket, the second support arm is connected to the second arm, and the included angle between the first support arm and the second support arm is greater than 90°.

7. The inner bottom cone feeder according to claim 6, characterized in that: The first support arm and the second support arm both include the hollow area, and the hollow area of ​​the first support arm is connected to the hollow area of ​​the second support arm.

8. The inner bottom cone feeder according to claim 1, characterized in that: The centerline position of the bottom cone includes a through hole penetrating the bottom cone, the bottom end of the lifting rod penetrates the through hole, and the lifting rod is fastened by a nut.

9. The inner bottom cone feeder according to claim 1, characterized in that: The lifting rod and the second beam are fastened and connected via nuts or welded.

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