CN113774481A

CN113774481A - Overflow protection system of polycrystalline ingot furnace

Info

Publication number: CN113774481A
Application number: CN202111053457.5A
Authority: CN
Inventors: 杨定勇; 朱庆龙; 张力峰
Original assignee: Yangzhou Jingying Photoelectric Technology Co ltd
Current assignee: Yangzhou Jingying Photoelectric Technology Co ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2021-12-10

Abstract

The invention belongs to the technical field of polycrystalline silicon ingot furnaces, and particularly relates to an overflow protection system of a polycrystalline silicon ingot furnace, which comprises a furnace body, wherein a top cover is transversely arranged at the upper end of the furnace body, the lower end of the top cover is clamped with a furnace opening formed in the upper end of the furnace body, a heat-insulating cylinder is fixedly arranged inside the furnace body, a crucible is fixedly arranged inside the heat-insulating cylinder, a sealing cover is transversely arranged at the upper end of the crucible, an annular plate is fixedly arranged on the lower side wall of the sealing cover, an overflow cotton layer is fixedly arranged on the inner wall of the annular plate, and the annular plate is clamped with the side wall of the crucible, so that polycrystalline silicon in the crucible can be effectively prevented from directly overflowing through the crucible opening when being melted, accidental damage can be caused, and the safety of polycrystalline silicon processing can be greatly improved.

Description

Overflow protection system of polycrystalline ingot furnace

Technical Field

The invention relates to the technical field of polycrystalline silicon ingot furnaces, in particular to an overflow protection system of a polycrystalline ingot furnace.

Background

The polycrystalline silicon ingot furnace is a key device for producing solar silicon wafers, when the polycrystalline silicon ingot furnace is used for ingot casting, if a crucible for containing a silicon material is defective or the charge is not standard, when the silicon material is partially or completely melted, the crucible is broken to cause silicon overflow, liquid silicon almost reacts with any substance, if the silicon flows onto a metal furnace tube, the furnace tube is corroded and perforated, under the action of high temperature, water in an interlayer of the furnace tube can be instantaneously vaporized, the pressure in the furnace rises suddenly, and the danger of explosion is caused. Therefore, the polysilicon ingot furnace must have overflow protection measures.

However, the existing protective measures of the polycrystalline silicon ingot furnace are that absorption or other protective measures are taken for silicon after the silicon in the polysilicon ingot furnace overflows, but the existing protective devices can not effectively prevent the crucible from being used and can not effectively prevent the problem that the silicon overflows from the crucible opening to cause danger in the calcining process.

Disclosure of Invention

The invention aims to provide an overflow protection system of a polycrystalline ingot furnace, which aims to solve the problem that when polycrystalline silicon is melted by the existing crucible in the background art, a crucible opening cannot be effectively protected, and the melted polycrystalline silicon is easy to overflow from the crucible opening, so that danger is generated.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a polycrystal ingot furnace overflow protection system, includes the furnace body, the upper end of furnace body transversely is provided with the top cap, the lower extreme of top cap with the fire door joint that the furnace body upper end was seted up, the fixed heat preservation section of thick bamboo that is provided with in inside of furnace body, the fixed crucible that is provided with in inside of heat preservation section of thick bamboo, the upper end of crucible transversely is provided with sealed lid, the fixed annular slab that is provided with of lower lateral wall of sealed lid, the fixed cotton layer of overflow that is provided with of inner wall of annular slab, the annular slab with the lateral wall joint of crucible.

Preferably, the fixed establishment that is provided with of upper side wall of top cap, fixed establishment includes the lead screw, the lead screw vertically sets up the upper end at the top cap, the lower extreme of lead screw with the upper side wall of top cap rotates to be connected, the fixed rotatory piece that is provided with in upper end of lead screw, the both ends of lateral wall are all fixed and are provided with the limiting plate on the top cap, the pole wall threaded connection of lead screw has the slide, the both sides wall of slide all with the lateral wall sliding connection of limiting plate, two the lower lateral wall of slide is all fixed and is provided with the connecting plate, two the lateral wall that the lower extreme of connecting plate all runs through the top cap extends to the lower extreme and rotates and is provided with the cardboard, the upper end of furnace body both sides wall is all fixed and is provided with the fixture block, two the cardboard all with the fixture block joint.

Preferably, the fixed pressing mechanism that is provided with between top cap and the sealed lid, pressing mechanism includes two montants, two the upper end of montant all with the lower lateral wall fixed connection of top cap, two the lower lateral wall of montant all sets up flutedly, two the inside of recess all slides and is provided with the slider, two the last lateral wall of slider all is fixed and is provided with the spring, two the upper end of spring all with the inner wall fixed connection of recess, two the lower lateral wall of slider all is fixed and is provided with according to the depression bar, two the lower extreme according to the depression bar all with the last lateral wall fixed connection of sealed lid.

Preferably, an electric heater is fixedly arranged at the left end inside the heat-insulating cylinder, mounting plates are fixedly arranged on two side walls of the heat-insulating cylinder, and the other ends of the mounting plates are fixedly connected with the inner wall of the furnace body through bolts.

Preferably, a graphite plate is transversely arranged on the lower side wall of the crucible, a graphite rod is fixedly arranged on the lower side wall of the graphite plate, overflow cotton is transversely and fixedly arranged at the lower end of the inner wall of the furnace body, the lower end of the graphite rod penetrates through the side wall of the overflow cotton and is fixedly connected with the lower end of the inner wall of the furnace body, an annular groove is formed in the upper side wall of the overflow cotton, overflow wires are fixedly arranged inside the annular groove, an alarm is fixedly arranged at the lower end of the right side wall of the furnace body, the overflow wires are electrically connected with the alarm through a connecting wire, a first asbestos blanket is fixedly arranged at the lower end of the inner wall of the heat-insulating cylinder, a through hole is formed in the lower side wall of the heat-insulating cylinder, and a second asbestos blanket is fixedly arranged on the inner wall of the through hole.

Compared with the prior art, the invention has the beneficial effects that:

through the common cooperation of pressing means, annular plate and sealed lid, be convenient for effectively prevent that the inside polycrystalline silicon of crucible from directly overflowing through the crucible mouth when melting to cause unexpected damage, improve the security of polycrystalline silicon processing greatly.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the first and second asbestos blankets of FIG. 1;

FIG. 3 is a schematic structural view of the overflow cotton of FIG. 1;

FIG. 4 is a schematic structural view of the top cover;

fig. 5 is an enlarged schematic view of a portion a of fig. 1.

In the figure: the device comprises a furnace body 1, a top cover 2, a heat preservation cylinder 3, a crucible 4, a sealing cover 5, an annular plate 6, a lead screw 7, a rotating block 8, a limiting plate 9, a sliding plate 10, a connecting plate 11, a clamping plate 12, a clamping block 13, a vertical rod 14, a sliding block 15, a spring 16, a pressing rod 17, an electric heater 18, an installation plate 19, a graphite plate 20, a graphite rod 21, overflow cotton 22, overflow silk 23, an alarm 24, a first asbestos blanket 25 and a second asbestos blanket 26.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example (b):

referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a polycrystal ingot furnace overflow protection system, including furnace body 1, the upper end of furnace body 1 transversely is provided with top cap 2, the fire door joint that the lower extreme of top cap 2 and 1 upper ends of furnace body were seted up, the fixed heat preservation section of thick bamboo 3 that is provided with in inside of furnace body 1, the fixed crucible 4 that is provided with in inside of heat preservation section of thick bamboo 3, the upper end of crucible 4 transversely is provided with sealed lid 5, the fixed annular slab 6 that is provided with of lower lateral wall of sealed lid 5, the fixed cotton layer of overflow that is provided with of inner wall of annular slab 6, the annular slab 6 and the lateral wall joint of crucible 4.

The fixed establishment that is provided with of upper side wall of top cap 2, fixed establishment includes lead screw 7, lead screw 7 vertically sets up the upper end at top cap 2, the lower extreme of lead screw 7 rotates with top cap 2's upper side wall to be connected, the fixed rotatory piece 8 that is provided with in upper end of lead screw 7, the equal fixed limiting plate 9 that is provided with in both ends of top cap 2 upper side wall, the pole wall threaded connection of lead screw 7 has slide 10, slide 10's both sides wall all with limiting plate 9's lateral wall sliding connection, two slide 10's the equal fixed connecting plate 11 that is provided with of lower side wall, the lateral wall that top cap 2 was all run through to the lower extreme and the rotation of two connecting plates 11 is provided with cardboard 12, the equal fixed fixture block 13 that is provided with in upper end of furnace body 1 both sides wall, two cardboard 12 all with fixture block 13 joints.

Fixed pressing mechanism that is provided with between top cap 2 and the sealed lid 5, pressing mechanism includes two montants 14, the upper end of two montants 14 all with top cap 2's lower lateral wall fixed connection, the lower lateral wall of two montants 14 is all seted up flutedly, the inside of two recesses all slides and is provided with slider 15, the last lateral wall of two sliders 15 is all fixed and is provided with spring 16, the upper end of two spring 16 all with the inner wall fixed connection of recess, the lower lateral wall of two sliders 15 is all fixed and is provided with according to pressure bar 17, two lower extremes according to pressure bar 17 all with the last lateral wall fixed connection of sealed lid 5.

An electric heater 18 is fixedly arranged at the left end inside the heat-insulating cylinder 3, mounting plates 19 are fixedly arranged on two side walls of the heat-insulating cylinder 3, and the other ends of the two mounting plates 19 are fixedly connected with the inner wall of the furnace body 1 through bolts.

The lower lateral wall of crucible 4 transversely is provided with graphite cake 20, the fixed graphite rod 21 that is provided with of lower lateral wall of graphite cake 20, the lower extreme of 1 inner wall of furnace body transversely fixes and is provided with overflow cotton 22, the lower extreme of graphite rod 21 run through overflow cotton 22's lateral wall and with the lower extreme fixed connection of 1 inner wall of furnace body, the ring channel has been seted up to overflow cotton 22's last lateral wall, the fixed overflow silk 23 that is provided with in inside of ring channel, the fixed alarm 24 that is provided with of right side wall lower extreme of furnace body 1, overflow silk 23 passes through electric connection between connecting wire and the alarm 24, the fixed first asbestos blanket 25 that is provided with of lower extreme of 3 inner walls of a heat preservation section of thick bamboo, the through-hole has been seted up to the lower lateral wall of a heat preservation section of thick bamboo 3, the fixed second asbestos blanket 26 that is provided with in inner wall of through-hole.

The working principle is as follows: during the use, place polycrystalline silicon in crucible 4, cover top cap 2 of upper end at the top, sealed lid 5 covers the upper end at crucible 4, two springs 16 promote the slider 15 of lower extreme and move down, two sliders 15 drive the press bar 17 of lower extreme and move down, with sealed lid 5 and the upper end of pressing tightly at crucible 4 of annular plate 6, effectively avoid when inside polycrystalline silicon melts, directly spout through the crucible mouth, if there is a small amount of polycrystalline silicon to flow out, can absorb through first asbestos blanket 25 and second asbestos blanket 26, when having a large amount of polycrystalline silicon to flow out, directly flow to the upper end of overflow cotton 22 and contact with inside overflow silk 26, cause the short circuit, then alarm 24 sends the sound.

While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a polycrystal ingot furnace overflow protection system, includes furnace body (1), its characterized in that: the upper end of furnace body (1) transversely is provided with top cap (2), the lower extreme of top cap (2) with the fire door joint that furnace body (1) upper end was seted up, the fixed heat preservation section of thick bamboo (3) that is provided with in inside of furnace body (1), the fixed crucible (4) that is provided with in inside of heat preservation section of thick bamboo (3), the upper end of crucible (4) transversely is provided with sealed lid (5), the lower lateral wall of sealed lid (5) is fixed and is provided with annular slab (6), the fixed overflow cotton layer that is provided with of inner wall of annular slab (6), annular slab (6) with the lateral wall joint of crucible (4).

2. The overflow protection system of the polycrystalline ingot furnace of claim 1, wherein: the furnace body is characterized in that a fixing mechanism is fixedly arranged on the upper side wall of the top cover (2), the fixing mechanism comprises a lead screw (7), the lead screw (7) is vertically arranged at the upper end of the top cover (2), the lower end of the lead screw (7) is rotatably connected with the upper side wall of the top cover (2), a rotating block (8) is fixedly arranged at the upper end of the lead screw (7), limiting plates (9) are fixedly arranged at the two ends of the upper side wall of the top cover (2), sliding plates (10) are in threaded connection with the rod wall of the lead screw (7), the two side walls of the sliding plates (10) are in sliding connection with the side walls of the limiting plates (9), connecting plates (11) are fixedly arranged on the lower side walls of the two sliding plates (10), the lower ends of the two connecting plates (11) extend to the lower ends through the side wall of the top cover (2) and are rotatably provided with clamping plates (12), and fixture blocks (13) are fixedly arranged at the upper ends of the two side walls of the furnace body (1), the two clamping plates (12) are clamped with the clamping blocks (13).

3. The overflow protection system of the polycrystalline ingot furnace of claim 1, wherein: fixed pressing mechanism that is provided with between top cap (2) and sealed lid (5), pressing mechanism includes two montants (14), two the upper end of montant (14) all with the lower lateral wall fixed connection of top cap (2), two the lower lateral wall of montant (14) is all seted up flutedly, two the inside of recess all slides and is provided with slider (15), two the last lateral wall of slider (15) all is fixed and is provided with spring (16), two the upper end of spring (16) all with the inner wall fixed connection of recess, two the lower lateral wall of slider (15) all is fixed and is provided with according to pressure bar (17), two the lower extreme of pressing bar (17) all with the last lateral wall fixed connection of sealed lid (5).

4. The overflow protection system of the polycrystalline ingot furnace of claim 1, wherein: the left end of the inside of a heat preservation section of thick bamboo (3) is fixed and is provided with electric heater (18), the both sides wall of a heat preservation section of thick bamboo (3) is all fixed and is provided with mounting panel (19), two the other end of mounting panel (19) all through the bolt with the inner wall fixed connection of furnace body (1).

5. The overflow protection system of the polycrystalline ingot furnace of claim 1, wherein: a graphite plate (20) is transversely arranged on the lower side wall of the crucible (4), a graphite rod (21) is fixedly arranged on the lower side wall of the graphite plate (20), the lower end of the inner wall of the furnace body (1) is transversely and fixedly provided with overflow cotton (22), the lower end of the graphite rod (21) penetrates through the side wall of the overflow cotton (22) and is fixedly connected with the lower end of the inner wall of the furnace body (1), the upper side wall of the overflow cotton (22) is provided with an annular groove, overflow wires (23) are fixedly arranged inside the annular groove, an alarm (24) is fixedly arranged at the lower end of the right side wall of the furnace body (1), the overflow wire (23) is electrically connected with the alarm (24) through a connecting wire, a first asbestos blanket (25) is fixedly arranged at the lower end of the inner wall of the heat-insulating cylinder (3), the lower side wall of the heat-insulating cylinder (3) is provided with a through hole, and the inner wall of the through hole is fixedly provided with a second asbestos blanket (26).