CN114108075A

CN114108075A - Tungsten alloy protective cover for sapphire growth by kyropoulos method

Info

Publication number: CN114108075A
Application number: CN202111340248.9A
Authority: CN
Inventors: 张敬利; 钟德荣; 童赤松
Original assignee: Ganzhou Grand Sea W&mo Group Co ltd
Current assignee: Ganzhou Grand Sea W&mo Group Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-03-01
Anticipated expiration: 2041-11-12
Also published as: CN114108075B

Abstract

The invention aims to provide a tungsten alloy protective cover for sapphire growth by a kyropoulos method, which comprises a fixing device, wherein the fixing device comprises a fixing ring, a first sealing ring, an installation block, a second sealing ring, a wedge-shaped block, a spring, a base, a hinge, a clamping plate and a handle, so that the tungsten alloy protective cover can be quickly sealed, the heat loss is reduced, and the air pressure condition during sapphire growth can be ensured; the heat preservation device comprises a cover body and a reflecting plate, and can reflect heat emitted in a heat radiation mode back to reduce heat loss; the buffer device comprises a supporting plate, a buffer block, a connecting block, a piston rod, a gasket and a piston tube, plays a role in buffering and damping, and avoids the influence of vibration generated by opening the base on the sapphire; stabilising arrangement including first installation cover, second installation cover, strengthening rib, act as go-between and handle, can improve the stability of seed crystal pole, and the crystal texture when guaranteeing sapphire growth is even, reaches higher quality.

Description

Tungsten alloy protective cover for sapphire growth by kyropoulos method

Technical Field

The invention relates to the technical field of sapphire crystal growth, in particular to a tungsten alloy protective cover for sapphire growth by a kyropoulos method.

Background

The kyropoulos method for producing sapphire is to put crystal raw materials into a high-temperature-resistant crucible to be heated and melted, and adjust the temperature field in a furnace to ensure that the upper part of a melt is in a state of being slightly higher than the melting point; and (3) enabling seed crystals on the seed crystal rod to contact the molten liquid level, reducing the surface temperature to a melting point after the surface of the seed crystals is slightly melted, pulling and rotating the seed crystal rod to enable the top of the melt to be in a supercooled state and crystallize on the seed crystals, and growing cylindrical crystals in the continuous pulling process. And seed crystal rod is directly inserted to traditional heating furnace top, connects inseparably, leads to the heat to scatter and disappear easily, rocks the quality of the sapphire that influences the production easily because of lacking fixedly when seed crystal rod rotates moreover.

For example, CN201720416925.3 proposes a tungsten alloy protective cover for sapphire growth by kyropoulos method, which comprises a cover bottom frame arranged at the cover bottom for fixing the distance between the heating element structure and the tungsten ring, and avoiding the direct contact between the two heat generating parts of the tungsten ring and the heating element structure, which affects the growth uniformity of sapphire crystal; the first tungsten cover and the second tungsten cover are respectively provided with a connecting rib, one end of the connecting rib is movable, the other end of the connecting rib is fixed, heat insulation cotton can be conveniently placed and replaced, cover body deformation caused by poor heat insulation of the annular cavity is avoided, in addition, due to the existence of the heat insulation cotton, tungsten components in the second tungsten cover can be greatly reduced and replaced by other materials such as low-price high-temperature-resistant metal or alloy, and the production cost of the tungsten alloy protection cover is reduced. The tungsten alloy protective cover has the advantages of convenience in assembly, simple structure, reliable performance and low cost, and meets the production requirements.

The invention can ensure the air tightness of the heating furnace when producing the sapphire, can protect the upper part of the heating furnace, and can stabilize the seed crystal rod, so that the sapphire crystal has more uniform texture and higher quality.

Disclosure of Invention

In order to solve the problems, the invention aims to provide a tungsten alloy protective cover for sapphire growth by a kyropoulos method, which can ensure the air tightness of a heating furnace during sapphire production, can protect the upper part of the heating furnace, and can stabilize a seed rod, so that the sapphire crystal has more uniform texture and higher quality.

The invention provides a tungsten alloy protective cover for sapphire growth by a kyropoulos method, which is characterized in that: the fixing device comprises a fixing ring, a first sealing ring, an installation block, a second sealing ring, wedge blocks, springs, a base, a hinge, a clamping plate and a handle, wherein screws are distributed on two sides of the fixing ring, the first sealing ring is arranged at the lower end of the inner side of the fixing ring, the second sealing ring is arranged at the upper end of the inner side of the fixing ring, the installation block is fixed in front of the fixing ring, the wedge blocks are symmetrically arranged in the installation block, the wedge blocks are connected through the springs, the base is arranged above the fixing ring through the hinge at the rear part, the clamping plate is fixed below the base and positioned above the installation block, and the handle is fixed on the cover body;

the heat preservation device comprises a cover body and a reflecting plate, wherein the cover body is fixed above the base, and the reflecting plate is fixed on the inner wall of the cover body;

the buffer device comprises a supporting plate, a buffer block, a connecting block, a piston rod, a gasket and a piston tube, wherein the supporting plate is fixed behind the fixing ring and positioned on two sides of the hinge, the buffer block is arranged at one end of the supporting plate and positioned below the fixing ring, the other end of the supporting plate is movably arranged on the connecting block, the piston rod is fixed on the connecting block, the gasket is sleeved at the bottom of the piston rod, the piston tube is movably arranged behind the cover body through a mounting seat and positioned above the supporting plate and connected to the piston rod;

the stabilizing device comprises a first mounting sleeve, a second mounting sleeve, reinforcing ribs, a pull wire and a handle, wherein the first mounting sleeve is fixed at the top end of the cover body, the second mounting sleeve is fixed below the first mounting sleeve through the reinforcing ribs, and the pull wire is uniformly distributed between the second mounting sleeve and the base.

Furthermore, the upper half part of the wedge-shaped block is in a hook shape with an inclined surface, and the lower half part of the wedge-shaped block is in a button shape and is provided with anti-skid grains.

Further, the base is of an annular structure, and the inner diameter of the base is matched with the outer diameter of the fixing ring.

Further, the cover body is made of tungsten alloy materials.

Furthermore, a through hole is formed above the cover body, and a vacuum cavity is arranged between the inner wall and the outer wall.

Further, the reflecting plate comprises three layers of plate bodies, through holes are formed in the middle of the reflecting plate, and the through holes are gradually increased from top to bottom.

Furthermore, the lower surface of the reflecting plate is a mirror surface, and the edge of the reflecting plate is low and the middle of the reflecting plate is high.

Furthermore, the piston tube body is provided with vent holes in an axially uniform distribution manner.

Furthermore, balls are movably arranged on the inner walls of the first installation sleeve and the second installation sleeve.

Further, the surface of the stay wire is rough.

Has the advantages that:

1. the utility model discloses a sapphire crystal growth device, including solid fixed ring, first sealing washer, solid fixed ring, second sealing washer, installation piece, fixed ring the place ahead, the symmetry is equipped with the wedge in the installation piece, through spring coupling between the wedge, solid fixed ring top is located through the hinge at rear to the base, the cardboard is fixed in the base below, be located the installation piece top, can seal fast, reduce calorific loss, can guarantee the atmospheric pressure condition when sapphire crystal growth again.

2. The cover body made of tungsten alloy materials is fixed above the base, a through hole is formed in the upper portion of the cover body, a vacuum cavity is arranged between the inner wall and the outer wall, the reflecting plate is fixed on the inner wall of the cover body and consists of three layers of plate bodies, the through holes are formed in the middle of the reflecting plate, the through holes are gradually enlarged from top to bottom, the lower surface of the reflecting plate is a mirror surface, the edge of the reflecting plate is low, the middle of the reflecting plate is high, heat emitted in a heat radiation mode can be reflected back, and heat loss is reduced.

3. The backup pad is fixed in solid fixed ring rear, is located the hinge both sides, backup pad one end is equipped with the buffer block, be located solid fixed ring below, other end movable mounting is in the connecting block, be fixed with the piston rod on the connecting block, still be equipped with the gasket cover in the piston rod bottom, the piston pipe is located cover body rear through the mount pad activity, be located the backup pad top and connect on the piston rod, play buffering absorbing effect, avoid the base to open the vibrations influence sapphire that produces.

4. First installation cover is fixed on cover body top, and the second installation cover passes through the strengthening rib to be fixed in first installation cover below, and the equipartition of acting as go-between is acted as go-between surface roughness between second installation cover and base, can improve the stability of seed crystal pole, and the crystal texture when guaranteeing sapphire growth is even, reaches higher quality.

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the overall structure of the present invention.

Fig. 3 is an exploded view of the fastening device of the present invention.

Fig. 4 is an exploded view of the bin storage device of the present invention.

Fig. 5 is a schematic view of the overall structure of the wedge block of the present invention.

FIG. 6 is a cross-sectional view of the insulating apparatus of the present invention.

Fig. 7 is a schematic view of the overall structure of the cushioning device of the present invention.

Fig. 8 is a cross-sectional view of a cushioning device of the present invention.

Fig. 9 is a schematic view of the overall structure of the stabilizing device of the present invention.

Reference numerals: a fixed ring 1; a screw 2; a first seal ring 3; a mounting block 4; a second seal ring 5; a wedge block 6; a spring 7; a base 8; a hinge 9; a card board 10; a cover body 11; a vacuum chamber 12; a reflection plate 13; a support plate 14; a buffer block 15; a connecting block 16; a piston rod 17; a spacer 18; a piston tube 19; an exhaust hole 20; a first mounting sleeve 21; a second mounting sleeve 22; a reinforcing rib 23; the balls 24; a pull wire 25; a handle 26.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments, and in order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below, which are, of course, merely examples and are not intended to limit the present invention.

Referring to the drawings, a tungsten alloy protective cover for sapphire growth by kyropoulos method according to an embodiment of the invention is described, as shown in fig. 3, 4 and 5, the tungsten alloy protective cover for sapphire growth by kyropoulos method comprises a fixing device, the fixing device comprises a fixing ring 1, a first sealing ring 3, a mounting block 4, a second sealing ring 5, a wedge 6, a spring 7, a base 8, a hinge 9 and a clamping plate 10, screws 2 are distributed on two sides of the fixing ring 1 and can be fixed on a heating furnace, the first sealing ring 3 is arranged at the lower end of the inner side of the fixing ring 1, the second sealing ring 5 is arranged at the upper end of the inner side of the fixing ring 1 to ensure the air tightness of installation, the mounting block 4 is fixed in front of the fixing ring 1, the wedge 6 is symmetrically arranged in the mounting block 4, the upper half of the wedge 6 is in a hook shape with an inclined surface, the lower half is in a button shape and is provided with an anti-slip texture, the wedges 6 are connected through the spring 7, for reseing, base 8 locates solid fixed ring 1 top through the hinge 9 at rear for base 8 can rotate around hinge 9, and cardboard 10 is fixed in the 8 below of base, is located installation piece 4 top, and handle 26 is fixed on the cover body 11, conveniently opens the cover body 11 and base 8.

In a specific embodiment: when the heating furnace is used, the fixing ring 1 is fixed on the heating furnace through the screw 2 arranged on the fixing ring 1, the base 8 is of an annular structure, the inner diameter of the base is matched with the outer diameter of the fixing ring 1, and the air tightness can be guaranteed when the base 8 is installed on the fixing ring 1.

When the base 8 is installed on the fixing ring 1, the wedge-shaped block 6 is clamped by the clamping plate 10, so that the base 8 cannot be rotated and opened, and the air pressure condition during sapphire growth is ensured.

When the base 8 needs to be opened, the wedge-shaped blocks 6 are pressed to enable the wedge-shaped blocks 6 on the two sides to be close to the middle, so that the wedge-shaped blocks 6 are separated from the clamping plate 10, and the base 8 can be opened through the handle 26.

As shown in fig. 6, the tungsten alloy protective cover for sapphire growth by kyropoulos method comprises a heat preservation device, wherein the heat preservation device comprises a cover body 11 and a reflecting plate 13, the cover body 11 made of tungsten alloy material is fixed above a base 8, a through hole is formed above the cover body 11, a vacuum cavity 12 is arranged between the inner wall and the outer wall and plays a role in heat preservation, the reflecting plate 13 is fixed on the inner wall of the cover body 11, the reflecting plate 13 consists of three layers of plate bodies, the middle of the reflecting plate is provided with the through hole, the through hole is gradually increased from top to bottom, the lower surface of the reflecting plate 13 is a mirror surface, and the edge of the reflecting plate 13 is low and the middle of the reflecting plate is high.

In a specific embodiment: the cover body 11 made of tungsten alloy material with the vacuum cavity 12 can better play a role in heat preservation, and the reflecting plate 13 arranged on the inner wall can reflect heat emitted in a heat radiation mode back, so that the loss of heat is reduced.

As shown in fig. 7 and 8, the tungsten alloy protection cover for kyropoulos sapphire growth comprises a buffer device, the buffer device, including a supporting plate 14, a buffer block 15, a connecting block 16, a piston rod 17, a gasket 18 and a piston tube 19, the supporting plate 14 is fixed at the rear of a fixing ring 1, and is located at two sides of a hinge 9, the buffer block 15 is arranged at one end of the supporting plate 14, and is located below the fixing ring 1, the other end of the supporting plate is movably installed on the connecting block 16, the piston rod 17 is fixed on the connecting block 16, the gasket 18 is further arranged at the bottom of the piston rod 17 in a sleeved mode, the piston tube 19 is movably arranged at the rear of a cover body 11 through an installation seat, the supporting plate 14 is located above and connected onto the piston rod 17, and exhaust holes 20 are axially uniformly distributed on the tube body of the piston tube 19.

In a specific embodiment: when the base 8 is opened, the piston pipe 19 moves backwards, the relative piston rod 17 compresses the gas in the piston pipe 19, the gas is discharged from the exhaust hole 20, the exhaust hole 20 used is reduced along with the propulsion of the piston rod 17, the exhaust speed is reduced, the motion resistance generated by the piston rod 17 is increased, the speed of opening the base 8 is reduced, the effect of buffering and damping is achieved, and the sapphire is prevented from being influenced by the vibration generated by opening the base 8.

As shown in fig. 9, a tungsten alloy safety cover for kyropoulos method sapphire is grown includes stabilising arrangement, stabilising arrangement includes first installation cover 21, second installation cover 22, strengthening rib 23, act as go-between 25 and handle 26, first installation cover 21 is fixed on the cover body 11 top, second installation cover 22 passes through the strengthening rib to be fixed in first installation cover 21 below, guarantee the stability when seed rod uses during the combined action, all movable ball 24 that is equipped with on first installation cover 21 and the second installation cover 22 inner wall, can make the normal rotation and the promotion of seed rod, act as go-between 25 equipartition between second installation cover 22 and base 8, act as go-between 25 roughness, can make the impurity that the high temperature sublimed out in the sapphire melt attach to act as go-between 25 better, be convenient for the clearance, the cover body 11 inner wall that impurity attached to the tungsten alloy and made has also been reduced.

In a specific embodiment: the seed rod is installed on first installation cover 21 and second installation cover 22, guarantees the rotation and the promotion of seed rod through ball 20 that is equipped with on its inner wall, and then guarantees the normal clear of kyropoulos method, and the 25 that act as go-between of equipartition simultaneously can reduce because of the rocking of seed rod rotation production to make the sapphire texture of growing more even.

The working principle is as follows: during the use through the screw 2 that is equipped with on solid fixed ring 1, make solid fixed ring 1 fix on the heating furnace, base 8 agrees with on solid fixed ring 1, cardboard 10 blocks wedge 6, make base 8 unable rotation open, atmospheric pressure condition when guaranteeing the sapphire growth, during the production sapphire, the cover body 11 that the tungsten alloy material that has vacuum cavity 12 made can play the heat preservation effect better, and reflecting plate 13 that is equipped with on the inner wall can go back the heat reflection that gives out with the heat radiation form, reduce thermal loss, then install the seed rod on first installation cover 21 and second installation cover 22 from cover body 11 top, the rotation and the promotion of seed rod are guaranteed through ball 20 that is equipped with on its inner wall, and then guarantee the normal clear of kyropoulos method.

After production is accomplished, seed rod and sapphire promote in the cover body 11, guarantee that the cover body 11 can normally open, then press wedge 6, make both sides wedge 6 draw close to the centre, thereby make wedge 6 break away from cardboard 10, through handle 26 alright open cover body 11 and base 8, when opening, piston pipe 19 backward movement, relative piston rod 17 will compress the gas in the piston pipe 19, gas will be discharged from exhaust hole 20, along with the propulsion of piston rod 17, the exhaust hole 20 that uses reduces, exhaust speed slows down, the motion resistance that produces piston rod 17 will increase, the speed of opening base 8 will reduce, thereby play buffering absorbing effect, avoid base 8 to open the vibrations that produce and influence the sapphire.

Claims

1. A tungsten alloy safety cover for kyropoulos sapphire growth is characterized in that: comprises that

The fixing device comprises a fixing ring, a first sealing ring, a mounting block, a second sealing ring, wedge blocks, springs, a base, hinges, clamping plates and a handle, wherein screws are distributed on two sides of the fixing ring;

the stabilizing device comprises a first mounting sleeve, a second mounting sleeve, reinforcing ribs, a pull wire and a handle, wherein the first mounting sleeve is fixed at the top end of the cover body, the second mounting sleeve is fixed below the first mounting sleeve through the reinforcing ribs, the pull wire is uniformly distributed between the second mounting sleeve and the base, and the handle is fixed on the cover body.

2. The tungsten alloy protective cover for kyropoulos sapphire growth according to claim 1, wherein the wedge block is in the shape of a hook with an inclined surface on the upper half and a button on the lower half and is provided with an anti-slip texture.

3. The protective shield of claim 1, wherein the base is of annular configuration having an inner diameter that is matched to an outer diameter of the retaining ring.

4. The tungsten alloy shield for sapphire growth by kyropoulos process as recited in claim 1, wherein the shield is made of a tungsten alloy material.

5. The protective cover of tungsten alloy for sapphire growth by kyropoulos method as claimed in claim 4, wherein the cover has a through hole formed therein and a vacuum chamber is formed between the inner and outer walls.

6. The tungsten alloy protective cover for sapphire growth by kyropoulos method according to claim 1, wherein the reflector plate is composed of three layers of plates, and the middle of each layer is provided with through holes, and the through holes are gradually enlarged from top to bottom.

7. The protective cover of tungsten alloy for sapphire growth by kyropoulos method according to claim 6, wherein the lower surface of the reflector plate is a mirror surface, and the edge of the reflector plate is lower and the middle of the reflector plate is higher.

8. The tungsten alloy shield for sapphire growth by kyropoulos method as recited in claim 1, wherein the piston tube, the tube body and the vent holes are uniformly distributed in the axial direction.

9. The tungsten alloy protective cover for sapphire growth by kyropoulos method according to claim 1, wherein the first mounting sleeve and the second mounting sleeve are movably provided with balls on the inner wall.

10. The tungsten alloy protective cover for kyropoulos sapphire growth according to claim 1, wherein the surface of the pull wire is rough.