CN202705572U - Heat insulation device for crystal growing furnace - Google Patents
Heat insulation device for crystal growing furnace Download PDFInfo
- Publication number
- CN202705572U CN202705572U CN 201220343045 CN201220343045U CN202705572U CN 202705572 U CN202705572 U CN 202705572U CN 201220343045 CN201220343045 CN 201220343045 CN 201220343045 U CN201220343045 U CN 201220343045U CN 202705572 U CN202705572 U CN 202705572U
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- screen
- heat
- heat insulation
- crystal growing
- growing furnace
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Abstract
The utility model discloses a heat insulation device for a crystal growing furnace. The heat insulation device mainly comprises a cylindrical heat insulation screen and a metal heat exchange screen, the cylindrical heat insulation screen is sleeved on the periphery of a crucible, the metal heat exchange screen is sleeved on the periphery of the cylindrical heat insulation screen, an annular space is reserved between the metal heat exchange screen and the heat insulation screen, and supports are supported between the outer surfaces of the metal heat exchange screen and the heat insulation screen and are uniformly distributed around the circumference in the annular space. When the heat insulation device for the crystal growing furnace is used, the outer surfaces of a tungsten heat insulation screen and a molybdenum heat insulation screen can be abutted by the metal heat exchange screen and the supports, so that the tungsten heat insulation screen and the molybdenum heat insulation screen cannot deform, the service lives of the tungsten heat insulation screen and the molybdenum heat insulation screen are effectively prolonged, and the production cost of corundum is reduced.
Description
Technical field
The utility model relates to a kind of crystal growing furnace high temperature insulating device.
Background technology
Take corundum (sapphire) as example, its main component is aluminum oxide (Al2O3), and its fusing point is 2050 ℃, so require high to stability, the resistance to elevated temperatures of the growth furnace thermal protection thermoscreen of boule monocrystal.The thermoscreen that generally uses in the production process at present is graphite charcoal felt thermoscreen, can enter crystals after the in use carbon volatilization of this thermoscreen and cause Prevent Carbon Contamination, although can be by the carbon impurity in the annealing process elimination crystal subsequently, but this production process complexity thereby tooling cost are higher, and because annealing process can't be eliminated the atom omission that carbon impurity stays, so that the quality of crystal is lower, in recent years eliminated by market gradually.Chinese utility model patent open file CN202214452U discloses the split nested type cylindrical thermoscreen that a kind of sapphire single-crystal furnace is used, this thermoscreen is made of at least two columnar thermoscreens of concentric, different diameter, each thermoscreen is made of the two-layer at least cylinder of concentric, and every layer of even dystectic rolling molybdenum sheet metal of cylinder rolls and form.In a single day this thermoscreen in use deforms easily and the thermoscreen distortion occurs, just thermoscreen all must be changed, otherwise can affect crystal quality in the corundum crystal growth furnace, the sticking pot of crystal appears when serious, even cracking can't use, usually only have the time about 6 months the mean life of this thermoscreen, thereby belong to the attrition component of crystal growing furnace, for the quality of production that guarantees corundum just needs to change frequently in process of production, cause the production cost of corundum always high.
The utility model content
The purpose of this utility model is: a kind of crystal growing furnace heat-proof device is provided, is out of shape easily the higher problem of production cost that causes corundum to solve in the existing corundum crystal growth furnace because of thermoscreen.
The technical solution of the utility model is: a kind of crystal growing furnace heat-proof device, comprise be used to the tubular screens that is set in the crucible periphery, also be arranged with the metal heat-exchange screen of tubular in described tubular screens periphery, between described metal heat-exchange screen and thermoscreen, leave annular space, in described annular space around being evenly distributed in the supporter of support and connection between metal heat-exchange screen and thermoscreen outside surface.
Described metal heat-exchange screen arranges with thermoscreen is concentric.
The axial length of described metal heat-exchange screen is not less than the axial length of thermoscreen.
Described supporter is the metal jackscrew of spinning on the metal heat-exchange screen.
Described metal jackscrew is provided with 12-360.
Described metal heat-exchange screen is made through round as a ball welding by the thick stainless steel of 2-50mm, copper or molybdenum and tungsten alloy sheet material.
The cylinder that described tubular screens is surrounded by 2-50 layer, molybdenum, tungsten or molybdenum and tungsten alloy thin-wall boards that 0.5-10mm is thick is sheathed the composition with one heart.
Described metal jackscrew is made by molybdenum, tungsten, molybdenum and tungsten alloy, fine copper or stainless steel.
Crystal growing furnace heat-proof device of the present utility model is at existing common tungsten, the support body supports that lay by circumference the periphery of molybdenum heat screen is arranged with the metal heat-exchange screen, it is when inner tungsten, when molybdenum heat screen is affected by thermograde, tungsten, the outside surface of molybdenum heat screen can't produce distortion because limited by holding out against of metal heat-exchange screen and supporter, thereby effectively prolonged tungsten, the work-ing life of molybdenum heat screen, it is simple in structure, easy to install, compared with prior art, at tungsten, molybdenum heat screen adopts supporter connection metal heat exchange screen rear so that tungsten outward, brought up to 12.5 month by original 6-8 month the mean life of molybdenum heat screen, since reduced thermoscreen replacing so that the use cost of thermoscreen reduced more than 50%, thereby effectively reduce the production cost of corundum.
Description of drawings
Fig. 1 is the structural representation that the utility model crystal growing furnace is used the heat-proof device specific embodiment;
Fig. 2 is the cross-sectional view of Fig. 1;
Fig. 3 is the A-A sectional view among Fig. 2.
Embodiment
Crystal growing furnace of the present utility model is with the implementation of heat-proof device for example Fig. 1, Fig. 2, shown in Figure 3, and this thermal protection heat-proof device mainly is located at the thermoscreen 1 of crucible periphery and metal heat-exchange screen 2 that concentric locking collar is located at the thermoscreen periphery and is connected to thermoscreen 1 and form with the metal jackscrew 4 that metal heat-exchange shields between 2 by being used for concentric locking collar.
Metal heat-exchange screen 2 adopts thick stainless steel, copper or the molybdenum and tungsten alloy sheet material of 2-50mm to make through round as a ball welding, its diameter is 400-800mm, highly be 500-980mm, the threaded hole 3 that to offer uniformly 12-360 diameter on this metal heat-exchange screen 2 be 5-30mm all is installed with the metal jackscrew 4 that the length of being made by tungsten, molybdenum, miramint, fine copper or stainless steel is 20-60mm in each threaded hole 3.In the present embodiment, the stainless steel plate that these metal heat-exchange screen 2 employing thickness are 15mm is made, its internal diameter is 700mm, highly be 800mm, on metal heat-exchange screen 2, be evenly distributed with 60 diameters take 100mm as intervals and be the threaded hole 3 of 12mm, all being installed with diameter in each threaded hole 3 is that 12mm, length are the molybdenum and tungsten alloy metal jackscrew 4 of 35mm, thereby the inner of each metal jackscrew 4 holds out against and makes metal heat-exchange shield 2 support and connection on thermoscreen 1 on the outside surface of thermoscreen 1.
Crystal growing furnace heat-proof device of the present utility model is at existing common tungsten, the peripheral concentric sheathed metal heat-exchange screen of molybdenum heat screen, be installed with some holding out against at tungsten at this metal heat-exchange screen, jackscrew on the molybdenum heat screen outside surface is realized metal heat-exchange screen and tungsten, being fixedly connected with of molybdenum heat screen, it works as tungsten, molybdenum heat screen is when being affected by thermograde, thermoscreen holds out against restriction in the metal jackscrew on the metal heat-exchange screen and is difficult to produce distortion because being subject to spinning, simultaneously, molybdenum, the tungsten thermoscreen utilizes the metal jackscrew by thermal conduction high temperature to be delivered on the metal heat-exchange screen, metal heat-exchange screen and the balanced heat exchange of the cooling water heat exchange system of single crystal furnace body, force the temperature temperature in the balanced single crystal growing furnace, it has effectively guaranteed the required temperature environment of crystal growth in the crucible high ambient temperatures district, make and remain the required thermograde of corundum production in the stove, thereby effectively guaranteed the quality of production of corundum, prolonged tungsten, the work-ing life of molybdenum heat screen, make tungsten, brought up to 12.5 month by original 6-8 month the mean life of molybdenum heat screen, reduced tungsten, the loss of molybdenum heat screen, the use cost of thermoscreen has been reduced more than 50%, thereby effectively reduce the production cost of corundum.
Claims (8)
1. crystal growing furnace heat-proof device, comprise be used to the tubular screens that is set in the crucible periphery, it is characterized in that, also be arranged with the metal heat-exchange screen of tubular in described tubular screens periphery, between described metal heat-exchange screen and thermoscreen, leave annular space, in described annular space around being evenly distributed in the supporter of support and connection between metal heat-exchange screen and thermoscreen outside surface.
2. crystal growing furnace heat-proof device according to claim 1 is characterized in that, described metal heat-exchange screen arranges with thermoscreen is concentric.
3. crystal growing furnace heat-proof device according to claim 1 is characterized in that, the axial length of described metal heat-exchange screen is not less than the axial length of thermoscreen.
4. crystal growing furnace heat-proof device according to claim 1 is characterized in that, described supporter is the metal jackscrew of spinning on the metal heat-exchange screen.
5. crystal growing furnace heat-proof device according to claim 4 is characterized in that, described metal jackscrew is provided with 12-360.
6. crystal growing furnace heat-proof device according to claim 1 is characterized in that, described metal heat-exchange screen is made through round as a ball welding by the thick stainless steel of 2-50mm, copper or molybdenum and tungsten alloy sheet material.
7. crystal growing furnace heat-proof device according to claim 1 is characterized in that, the cylinder that described tubular screens is surrounded by 2-50 layer, molybdenum, tungsten or molybdenum and tungsten alloy thin-wall boards that 0.5-10mm is thick is sheathed the composition with one heart.
8. crystal growing furnace heat-proof device according to claim 1 is characterized in that, described metal jackscrew is made by molybdenum, tungsten, molybdenum and tungsten alloy, fine copper or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220343045 CN202705572U (en) | 2012-07-16 | 2012-07-16 | Heat insulation device for crystal growing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220343045 CN202705572U (en) | 2012-07-16 | 2012-07-16 | Heat insulation device for crystal growing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202705572U true CN202705572U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220343045 Expired - Fee Related CN202705572U (en) | 2012-07-16 | 2012-07-16 | Heat insulation device for crystal growing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202705572U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732970A (en) * | 2012-07-16 | 2012-10-17 | 登封市蓝天石化光伏电力装备有限公司 | Heat-insulating device for crystal growing furnace |
-
2012
- 2012-07-16 CN CN 201220343045 patent/CN202705572U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732970A (en) * | 2012-07-16 | 2012-10-17 | 登封市蓝天石化光伏电力装备有限公司 | Heat-insulating device for crystal growing furnace |
| CN102732970B (en) * | 2012-07-16 | 2015-12-16 | 登封市蓝天石化光伏电力装备有限公司 | A kind of crystal growing furnace heat-proof device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20190716 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |