CN213617361U - Anti-oxidation device and crucible mold - Google Patents

Abstract

The utility model provides an anti-oxidation device and crucible mould. An oxidation preventing device for a crucible mold, the device comprising: the annular cover body is covered at the upper end part of the crucible mold, and the inner edge surface of the cover body is positioned on one side of the inner surface of the crucible mold, which is far away from the central axis of the crucible mold; and the connecting mechanism is used for detachably connecting the cover body and the upper end part. The utility model discloses in, the upper end of crucible mould is located in order to cover the protection to the upper end to annular lid, the oxidation corrosion of upper end has been avoided to furthest, protect the crucible mould effectively, coupling mechanism links together lid and upper end, be convenient for change after the lid oxidation, and the crucible mould need not to be changed, make it can continue production, the shared no output man-hour of oxide layer of clearance upper end has been reduced, coupling mechanism can guarantee that the fixing between lid and the upper end is more stable, reliable, avoided lid and upper end to separate in the use, the anti-oxidation effect of lid has been improved.

Description

Anti-oxidation device and crucible mold

Technical Field

The utility model relates to a crucible technical field particularly, relates to an anti-oxidation device and crucible mould.

Background

The quartz crucible is an important accessory for drawing a silicon rod of solar energy and semiconductor single crystal, when the quartz crucible is produced by adopting an arc process, a high-purity quartz sand raw material is poured into a metal mold, the quartz sand raw material is uniformly molded on the inner surface of the mold through a molding rod, then the mold is sent into a melting chamber, and the quartz sand is melted through the high temperature of an electric arc generated by a graphite electrode.

However, in the process of melting the quartz crucible, the upper end portion of the metal mold is not covered with the quartz sand, and is easily oxidized in a high temperature environment, and after being melted for many times, an oxide layer having a certain thickness is formed on the surface of the upper end portion of the metal mold. The oxide layer has a loose structure, and is easy to fall into quartz sand or a quartz crucible which is not completely melted, so that metal impurity points are formed in a final quartz crucible finished product, the quality of the quartz crucible is influenced, and the service life of a metal mold can be shortened. At present, the oxide layer at the upper end of the metal mold is removed in a polishing mode, however, production needs to be suspended during polishing, and the production efficiency of the melting furnace is greatly reduced.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an anti oxidation device aims at solving the problem that needs the production of suspending to reduce production efficiency when the oxide layer of crucible mould upper end department clears up among the prior art. The utility model also provides a crucible mould with anti oxidation device.

In one aspect, the utility model provides an anti-oxidation device for the crucible mould, the device includes: the annular cover body is covered at the upper end part of the crucible mold, and the inner edge surface of the cover body is positioned on one side of the inner surface of the crucible mold, which is far away from the central axis of the crucible mold; and the connecting mechanism is used for detachably connecting the cover body and the upper end part.

Furthermore, in the above oxidation prevention device, an annular groove is formed at the upper end portion, and the cover body portion is embedded in the annular groove.

Further, in the above-described oxidation prevention device, the upper end portion is provided with an annular flange near the inner surface thereof, and the lid body is provided to cover the upper end portion and is in contact with the flange.

Further, in the above-mentioned oxidation prevention device, the connection mechanism is a press-fit structure for press-fitting the cover body and the upper end portion cover or a snap-fit structure for wrapping the cover body and the upper end portion.

Further, in the above oxidation prevention device, the crimping structure includes: a plurality of coupling assembling that distribute along lid circumference, every coupling assembling all includes: the connecting plate comprises a connecting plate, a supporting column and a bolt, wherein the first end of the connecting plate is a free end and covers one surface of the cover body, which is far away from the upper end part, the second end of the connecting plate is contacted with the upper end part through the supporting column, and the bolt penetrates through the connecting plate and is in threaded connection with the upper end part.

Furthermore, in the anti-oxidation device, a plurality of accommodating grooves which are recessed towards the inner edge surface are formed in the outer edge surface of the cover body along the circumferential direction, and one surface of each accommodating groove, which faces the cover body and is far away from the upper end portion, is provided with an opening; the first end of the connecting plate in each connecting assembly is inserted into one accommodating groove.

Further, in the above-mentioned anti-oxidation device, the clamping structure includes: the body is established to the card that two at least detachably connect, and curved joint groove has all been seted up to every card and establishes the body, forms annular joint chamber after each joint groove is connected, and the joint intracavity is all arranged in to lid and upper end.

Further, in the above oxidation prevention device, when there are two clamping bodies, the two clamping bodies are in butt joint, one butt joint of the two clamping bodies is in rotatable connection, and the other butt joint is in snap joint.

Further, in the above oxidation prevention device, each of the engagement bodies includes: a first arc-shaped plate; two second arc that set up side by side, first arc press from both sides and locate between two second arcs, and the arc space that first arc and two second arcs enclose to establish constitutes the joint groove.

On the other hand, the utility model also provides a crucible mould, crucible mould includes: a body and any one of the above oxidation preventing means; wherein, the upper end face of the body is provided with an upper end part, and a connecting mechanism in the anti-oxidation device detachably connects the cover body to the upper end part.

In the utility model, the annular cover body is covered on the upper end part of the crucible mold, the upper end part can be covered and protected, the influence caused by the oxidation corrosion of the upper end part is reduced to the maximum extent, the crucible mold is effectively protected, meanwhile, the cover body can be detachably connected with the upper end part by the connecting mechanism, so that the crucible mold can be quickly disassembled, assembled and replaced after being used, because the anti-oxidation device can not introduce any splicing seam on the inner surface of the crucible mold, the crucible mold is integrally formed, the using effect of the mold and the forming quality of the crucible are not influenced, the disassembly and replacement inconvenience caused by the oxidation deformation at the splicing seam can not be caused, the crucible mold does not need to be replaced, the production can be continued, the service life of the crucible mold is prolonged, the non-production working hours occupied by cleaning the oxidation layer at the upper end part are reduced, and the production efficiency of the melting furnace and the yield of the crucible are further, the problem of among the prior art need suspend production when the oxide layer clearance of crucible mould upper end department reduces production efficiency is solved to, coupling mechanism's setting can guarantee that the fixed between lid and the upper end is more stable, reliable, has avoided lid and upper end to separate in the use effectively, and then has improved the anti-oxidation effect of device.

Due to the effect of the anti-oxidation device, the crucible mold with the anti-oxidation device also has corresponding technical effect.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural view of an oxidation preventing device provided in an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic top view of an oxidation preventing device according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a cover body in the oxidation prevention device according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a connection mechanism in the oxidation prevention device according to the embodiment of the present invention;

fig. 6 is a schematic structural view of an oxidation preventing device according to an embodiment of the present invention;

fig. 7 is a schematic top view of an oxidation preventing device according to an embodiment of the present invention;

fig. 8 is another schematic structural diagram of a connection mechanism in the oxidation prevention device according to the embodiment of the present invention.

The reference signs are: lid 1, storage tank 11, body 2, flange 3, upper end 4, coupling mechanism 5, coupling assembling 51, connecting plate 511, support column 512, bolt 513, the card establishes body 52, joint groove 521, first arc 522, second arc 523, hasp 53.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

Embodiment of oxidation preventing device:

referring to fig. 1 to 3, there is shown a preferred structure of the oxidation preventing means in the present embodiment. As shown in the drawing, an oxidation preventing device is used for the crucible mold and provided at the upper end portion 4 of the crucible mold to prevent the upper end portion 4 from being oxidized. The oxidation preventing device includes: a cover 1 and a connection mechanism 5. Wherein, crucible mould includes: the body 2, upper end 4 is located the upper portion terminal surface department of body 2, and wherein, body 2 and upper end 4 are integrated into one piece. The cover body 1 is annular, and the cover body 1 covers the upper end portion 4 so as to cover the upper end portion 4. Because the cover body 1 covers the upper end part 4, the cover body 1 can be oxidized in the oxidation process, the oxidation of the upper end part 4 is avoided, and the protection of the upper end part 4 is realized.

The inner edge surface of the cover body 1 is positioned on one side of the inner surface of the crucible mold far away from the central axis of the crucible mold. Specifically, the inner edge surface of the lid body 1 is farther from the central axis of the crucible mold than the inner surface of the crucible mold, i.e., the inner surface of the body 2, i.e., the inner surface of the upper end portion 4, of the lid body 1 is, compared to the inner surface of the crucible mold, which is the inner surface of the crucible mold. Like this, the inner edge face of lid 1 and the internal surface of upper end 4 are not alignd, just can not appear splicing seam in the internal surface department of crucible mould, and the inner wall of body 2 is integrated into one piece promptly, does not receive the influence that lid 1 set up, has guaranteed the quality of crucible mould, and then has improved the quality of crucible.

In specific implementation, the cross-sectional shape of the crucible mold may be circular, rectangular, etc., and this embodiment does not limit this. The ring shape of the cover 1 may be a circular ring shape or a ring shape, which is not limited in this embodiment. In the present embodiment, the sectional shape of the crucible mold is circular, the lid body 1 is circular, the inner diameter of the lid body 1 is larger than the inner diameter of the upper end portion 4, and the outer diameter of the lid body 1 is equal to or smaller than the outer diameter of the upper end portion 4.

The connecting mechanism 5 is used to detachably connect the cover 1 and the upper end 4, so as to prevent the cover 1 and the upper end 4 from being separated during use. Preferably, coupling mechanism 5 is the joint structure or crimping structure, and wherein, the joint structure is established lid 1 and upper end 4 package, specifically establishes lid 1 and the periphery of upper end 4 package. The crimping structure performs cover pressing connection on the cover body 1 and the upper end portion 4, specifically performs crimping on the cover body 1, and then connects the cover body 1 and the upper end portion 4 together.

Preferably, the cover body 1 is made of a high-temperature resistant material, so that the cover body 1 has excellent oxidation resistance, and the service life of the crucible mold is further prolonged. Specifically, the lid body 1 may be a metal, a metal and nonmetal compound, an intermetallic compound, or the like. Such as: boride, carbide, nitride, silicide, phosphide, sulfide, boron carbide, silicon carbide, boron nitride, silicon nitride, boron phosphide, silicon phosphide and the like of tungsten, molybdenum, tantalum, niobium, vanadium, chromium, titanium, zirconium and the like refractory metals and rare earth metals. The present embodiment does not set any limit to the material of the lid body 1.

Preferably, the upper end portion 4 may be provided with an annular flange 3, the flange 3 being provided adjacent to the inner surface of the upper end portion 4. Specifically, the flange 3 is provided on the top surface (upper surface shown in fig. 2) of the upper end portion 4, and the inner edge surface of the flange 3 is aligned with the inner surface of the crucible mold body 2. Preferably, the flange 3 is integrally formed with the body 2 of the crucible mold. The lid body 1 abuts against the flange 3, that is, the inner edge surface of the lid body 1 abuts against the outer edge surface of the flange 3. When the flange 3 and the lid 1 are both circular, the inner diameter of the lid 1 is equal to the outer diameter of the flange 3. Like this, the inner edge face butt of lid 1 is in flange 3, lid 1 and upper end 4 are fixed to rethread coupling mechanism 5, can guarantee relatively fixed between lid 1 and the upper end 4 effectively, and need not with the help of other parts, also need not to reform transform other structures of crucible mould, and is simple and convenient, when lid 1 is dismantled to needs, only to coupling mechanism 5 operation can, do not influence other parts of crucible mould, make the crucible mould can continuously keep production, and then improved the production efficiency of founding the stove and the output of crucible.

In a specific embodiment, the outer diameter of the flange 3 is small, specifically as small as possible, so as to increase the area of the cover body 1 covering the upper end portion 4, and further increase the protection of the cover body 1 against the upper end portion 4.

It can be seen that, in the embodiment, the annular cover body 1 is covered on the upper end portion 4 of the crucible mold, and can cover and protect the upper end portion 4, so as to reduce the influence caused by the oxidation corrosion of the upper end portion 4 to the maximum extent, and effectively protect the crucible mold, and the connecting mechanism 5 can detachably connect the cover body 1 and the upper end portion 4 together, so that the crucible mold can be quickly disassembled and replaced after being used, because the anti-oxidation device can not introduce any seam on the inner surface of the crucible mold, the crucible mold is integrally formed, the using effect of the mold and the molding quality of the crucible are not affected, and the inconvenience of disassembling and replacing caused by the oxidation deformation at the seam can not be caused, and the crucible mold does not need to be replaced, can be continuously produced, prolongs the service life of the crucible mold, and reduces the non-production man-hour occupied by cleaning the oxide layer on the upper end portion, and then improved the production efficiency of melting stove and the output of crucible, solved among the prior art need suspend production when the oxide layer of crucible mould upper end department clears up and reduce production efficiency's problem to, coupling mechanism 5's setting can guarantee that fixed between lid 1 and the upper end 4 is more stable, reliable, has avoided lid 1 and upper end 4 to separate in the use effectively, and then has improved the anti-oxidation effect of device.

Referring to fig. 1 and 2, in the above embodiment, the upper end portion 4 is provided with an annular groove, and the cover body 1 is embedded in the annular groove. Like this, the annular groove can carry on spacingly to lid 1, and in the crucible forming process, the stability of lid 1 can further be guaranteed to the annular groove, avoids lid 1 to remove.

In particular, the cover 1 may be completely seated in the annular groove, i.e. the top surface (upper surface as shown in fig. 2) of the cover 1 is flush with the top surface of the upper end 4. It is also possible that the cover 1 is partly placed in the annular groove and partly outside the annular groove, i.e. the top surface of the cover 1 is higher than the top surface of the upper end 4. More preferably, the top surface of the lid body 1 is higher than the top surface of the upper end portion 4, so that the lid body 1 is preferentially corroded by oxidation corrosion, effectively protecting the lid body 1.

Preferably, the annular groove is disposed adjacent to the flange 3, that is, the inner edge surface of the annular groove and the outer edge surface of the flange 3 are the same wall surface, and the cover body 1 is embedded in the annular groove, so that the cover body 1 is still abutted to the flange 3.

Referring to fig. 1 to 5, the crimping structure may include: a plurality of connecting members 51. The connection assemblies 51 are distributed along the circumferential direction of the cover 1, preferably uniformly distributed. In specific implementation, the number of the connecting components 51 may be determined according to actual situations, and this embodiment does not limit this.

Each of the connection assemblies 51 may include: a connecting plate 511, a support column 512 and a bolt 513. The first end (left end shown in fig. 2) of the connection plate 511 is a free end, and the first end of the connection plate 511 is covered on a surface of the lid body 1 away from the upper end portion 4 (i.e., the top surface of the lid body 1, i.e., the upper surface shown in fig. 2), i.e., the first end of the connection plate 511 covers the top surface of the lid body 1, and the second end (right end shown in fig. 2) of the connection plate 511 is in contact with the upper end portion 4 through the support column 512. Specifically, the supporting column 512 is disposed perpendicular to the connecting plate 511, a first end (an upper end shown in fig. 2) of the supporting column 512 is connected to a second end of the connecting plate 511, and a second end (a lower end shown in fig. 2) of the supporting column 512 is in contact with the upper end portion 4, so that the connecting plate 511 and the supporting column 512 form an L-shaped structure. Preferably, the supporting column 512 is integrally formed with the connecting plate 511.

The bolt 513 is inserted through the connection plate 511 and screwed with the upper end 4. Specifically, the upper end 4 is opened with a threaded hole, and a bolt 513 is screwed with the threaded hole.

It can be seen that in the present embodiment, the first end of the connection plate 511 covers the top surface of the lid body 1, and since a certain distance is provided between the top surface of the lid body 1 and the upper end portion 4, in order to keep the connection plate 511 in a flat state, the support column 512 supports the second end of the connection plate 511 to ensure stable contact between the connection plate 511 and the lid body 1, and the bolt 513 connects the connection plate 511 and the upper end portion 4 together, so as to connect the lid body 1 and the upper end portion 4 together, which has a simple structure and is convenient to implement.

With reference to fig. 1 to 5, in the above embodiment, the outer edge surface of the cover body 1 is provided with a plurality of accommodating grooves 11 recessed toward the inner edge surface thereof, and specifically, each accommodating groove 11 extends toward the inner edge surface of the cover body 1. The outer edge surface of the lid 1 is the outermost wall surface of the lid 1. Referring to fig. 4, each of the receiving grooves 11 is open toward a surface of the cover 1 away from the upper end 4 (i.e., a top surface of the cover 4, i.e., the upper surface shown in fig. 4). Specifically, with respect to fig. 4, the top (upper portion shown in fig. 4) and the side (corresponding to the outer edge surface of the lid 1) of each receiving groove 11 are both open to form a notch, that is, a notch is dug from the top surface (upper surface shown in fig. 2) of the lid 1 to the bottom surface (lower surface shown in fig. 2) thereof, and the notch extends only a certain distance in the height direction of the lid 1 (the direction from top to bottom shown in fig. 2) and in the direction perpendicular to the height direction of the lid 1 (the direction from left to right shown in fig. 2), that is, the extending distance in the height direction of the lid 1 is smaller than the height of the lid. The extending distance in the direction perpendicular to the height direction of the lid body 1 is smaller than the distance between the inner edge surface and the outer edge surface of the lid body. The bottom surface of the lid 1 is a surface in contact with the upper end 4.

The containing grooves 11 are formed along the circumferential direction of the lid body 1, and preferably, the containing grooves 11 are uniformly distributed along the circumferential direction of the lid body 1. The first end of the connecting plate 511 in each connecting assembly 51 is inserted into one receiving groove 11, and specifically, one connecting plate 511 can be inserted into only one receiving groove 11. In specific implementation, the number of the connecting members 51 may be the same as the number of the receiving grooves 11, so that each connecting member 51 corresponds to each receiving groove 11 one to one, and the first end of each connecting plate 511 is inserted into the corresponding receiving groove 11. Alternatively, the number of the connecting members 51 may be smaller than the number of the receiving grooves 11, and each connecting plate 511 may be selectively placed in the receiving groove 11. Thus, the connecting plate 511 and the cover body 1 are relatively fixed in a plug-in connection mode, and the connecting plate 511 is connected with the upper end portion 4 through the bolt 513, so that stable connection between the cover body 1 and the upper end portion 4 is ensured, and the position stability of the cover body 1 in the use process of the crucible mold can be ensured.

During the concrete implementation, the storage tank can be rectangular groove, square groove, circular groove etc. and this embodiment does not do any restriction to the shape of storage tank. The shape of the receiving groove matches the shape of the connection plate 511.

Referring to fig. 6 to 8, the clamping structure may include: at least two snap bodies 52. Wherein each of the engaging bodies 52 is detachably connected. Each clamping body 52 is provided with an arc-shaped clamping groove 521, after each clamping body 52 is connected, each arc-shaped clamping groove 521 is connected to form an annular clamping cavity, and the cover body 1 and the upper end part 4 are arranged in the clamping cavity. The annular clamping cavity accommodates the cover body 1 and the upper end portion 4 from the outer side portion of the whole body of the cover body 1 and the upper end portion 4, and then each clamping body 52 is arranged at the outer side portion of the upper end portion 4 along the circumferential direction of the upper end portion 4. Specifically, the clamping grooves 521 are formed in the inner wall of the clamping body 52 and are recessed inwards, the bottom walls of the clamping grooves 521 are arc-shaped, and thus the clamping grooves 521 are connected to form an integral ring. Preferably, each of the engaging bodies 52 has an arc shape, and the arc shape of the engaging groove 521 corresponds to the arc shape of the engaging body 52.

With continued reference to fig. 6-8, each of the snap bodies 52 may include: a first arcuate plate 522 and two second arcuate plates 523. The two second arc-shaped plates 523 are arranged in parallel, the first arc-shaped plate 522 is clamped between the two second arc-shaped plates 523, the cross section of the first arc-shaped plate 522 connected with the two second arc-shaped plates 523 is U-shaped, and the U-shaped opening is arranged laterally as can be seen from the attached drawings. The first arc-shaped plate 522 and the two second arc-shaped plates 523 form an arc-shaped space to form a clamping groove 521, the top surface (the upper surface in fig. 6) of the cover body 1 is contacted with the inner wall surface of one second arc-shaped plate 523, and the bottom surface (the lower surface in fig. 6) of the upper end portion 4 is contacted with the inner wall surface of the other second arc-shaped plate 523. Preferably, the first arcuate plate 522 and the two second arcuate plates 523 are integrally formed.

When there are two fastening bodies 32, the two fastening bodies 32 are connected in a butt joint manner, preferably, one butt joint of the two fastening bodies 52 is rotatably connected, and the other butt joint of the two fastening bodies 52 is connected by the buckle 53.

It can be seen that, in this embodiment, establish the body butt joint through each card and form curved joint chamber after, including can all holding lid 1 and upper end 4, simple structure, the implementation of being convenient for to, two card establish the body can dismantle the connection, convenient to install and dismantle.

In summary, in the embodiment, the annular cover body is covered on the upper end portion of the crucible mold, so as to cover and protect the upper end portion, thereby reducing the influence caused by the oxidation corrosion of the upper end portion to the maximum extent, effectively protecting the crucible mold, and meanwhile, the connecting mechanism can detachably connect the cover body and the upper end portion together, so that the crucible mold can be quickly disassembled and replaced after being used, because the anti-oxidation device can not introduce any splicing seams on the inner surface of the crucible mold, the crucible mold is integrally formed, the using effect of the mold and the forming quality of the crucible are not influenced, meanwhile, the disassembly and replacement inconvenience caused by the oxidation deformation at the splicing seams can not be caused, the crucible mold does not need to be replaced, the production can be continued, the service life of the crucible mold is prolonged, the production time for cleaning the oxidation layer at the upper end portion is reduced, and the production efficiency of the melting furnace and the yield of the crucible are further improved, and the arrangement of the connecting mechanism can ensure that the cover body and the upper end part are fixed more stably and reliably, and the cover body and the upper end part are effectively prevented from being separated in the use process, so that the anti-oxidation effect of the device is improved.

Crucible mold embodiment:

the present embodiment also provides a crucible mold, including: a body 2 and any one of the oxidation preventing means described above. Wherein, the upper end face of the body 2 is provided with an upper end part 4, and a connecting mechanism 5 in the oxidation preventing device detachably connects the cover body 1 to the upper end part 4. The specific implementation process of the oxidation preventing device can be referred to the above description, and the detailed description of the embodiment is omitted here.

Due to the effect of the anti-oxidation device, the crucible mold with the anti-oxidation device also has corresponding technical effect.

It should be noted that the principle of the oxidation preventing device and the crucible mold having the same in the present invention is the same, and the related parts can be referred to each other.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. An anti-oxidation device for a crucible mold, comprising:

the annular cover body (1) is covered at the upper end part (4) of the crucible mold, and the inner edge surface of the cover body (1) is positioned on one side of the inner surface of the crucible mold, which is far away from the central axis of the crucible mold;

a connecting mechanism (5) for detachably connecting the cover body (1) and the upper end portion (4).

2. An oxidation prevention device according to claim 1, characterized in that the upper end portion (4) is provided with an annular groove in which the cap (1) is embedded.

3. An oxidation prevention device according to claim 1, characterized in that the upper end portion (4) is provided with an annular flange (3) near its inner surface, and the cap body (1) is provided on the upper end portion (4) and abuts against the flange (3).

4. The oxidation preventing device according to claim 1 or 2, wherein the connecting mechanism (5) is a press-fit structure for press-fitting the cover body (1) and the upper end portion (4) or a snap-fit structure for wrapping the cover body (1) and the upper end portion (4).

5. The oxidation prevention device according to claim 4, wherein the crimping structure includes:

a plurality of connection assemblies (51) distributed circumferentially along the cover (1), each connection assembly (51) comprising: connecting plate (511), support column (512) and bolt (513), the first end of connecting plate (511) is the free end and hides and locates lid (1) is kept away from the one side of upper end portion (4), the second end of connecting plate (511) passes through support column (512) with upper end portion (4) contact, bolt (513) wear to locate connecting plate (511) and with upper end portion (4) looks spiro union.

6. An oxidation prevention device according to claim 5,

a plurality of accommodating grooves (11) which are sunken towards the inner edge surface are formed in the outer edge surface of the cover body (1) along the circumferential direction, and one surface, facing the cover body (1), of each accommodating groove (11) and far away from the upper end portion (4) is open;

the first end of a connecting plate (511) in each connecting assembly (51) is inserted into one accommodating groove (11).

7. The oxidation prevention device of claim 4, wherein the snap structure comprises:

at least two blocks of removable connections are established body (52), every arc joint groove (521) have all been seted up to the block and established body (52), each joint groove (521) form annular joint chamber after connecting, lid (1) with upper end (4) all are arranged in the joint intracavity.

8. The oxidation preventing device according to claim 7, wherein when there are two said engaging bodies (52), two said engaging bodies (52) are connected in butt joint, one of the butt joints of the two said engaging bodies (52) is rotatably connected, and the other butt joint is connected by a buckle (53).

9. The oxidation preventing device according to claim 7, wherein each of the catching bodies (52) includes:

a first arcuate plate (522);

the clamping groove (521) is formed by two second arc-shaped plates (523) which are arranged in parallel, the first arc-shaped plate (522) is clamped between the two second arc-shaped plates (523), and the arc-shaped space enclosed by the first arc-shaped plate (522) and the two second arc-shaped plates (523) forms the clamping groove (521).

10. A crucible mold, comprising: a body (2) and an oxidation prevention device according to any one of claims 1 to 9; wherein the content of the first and second substances,

an upper end part (4) is arranged on the upper end face of the body (2), and a connecting mechanism (5) in the anti-oxidation device detachably connects the cover body (1) to the upper end part (4).

Images