CN107779949B - A just dismantle base device for solar quartz crucible is fixed - Google Patents
A just dismantle base device for solar quartz crucible is fixed Download PDFInfo
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- CN107779949B CN107779949B CN201711204905.0A CN201711204905A CN107779949B CN 107779949 B CN107779949 B CN 107779949B CN 201711204905 A CN201711204905 A CN 201711204905A CN 107779949 B CN107779949 B CN 107779949B
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- Prior art keywords
- crucible
- roof
- base device
- plate
- fixed
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000010453 quartz Substances 0.000 title claims abstract description 29
- 229910001220 stainless steel Inorganic materials 0.000 claims description 17
- 239000010935 stainless steel Substances 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 3
- 238000000429 assembly Methods 0.000 claims 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 7
- 229920005591 polysilicon Polymers 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000005350 fused silica glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B28/00—Production of homogeneous polycrystalline material with defined structure
- C30B28/04—Production of homogeneous polycrystalline material with defined structure from liquids
- C30B28/06—Production of homogeneous polycrystalline material with defined structure from liquids by normal freezing or freezing under temperature gradient
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/06—Silicon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a convenient-to-detach base device for fixing a solar quartz crucible, and relates to the technical field of quartz crucibles. This a just dismantle base device for solar quartz crucible is fixed, including crucible mount, roof and bottom plate, the bottom of crucible mount and the last fixed surface of roof are connected, and evenly distributed's I shape fixed subassembly is passed through to the bottom of roof and the top fixed connection of bottom plate, is equipped with evenly distributed's crucible mounting groove on the crucible mount, equal fixed connection between every two crucible mounting grooves, and the both sides of every crucible mounting groove all are equipped with L type fixed plate, and L type fixed plate passes through the top fixed connection of first fastening bolt and roof. This a just dismantle base device for solar quartz crucible is fixed, equipment or dismantlement are convenient, convenient to use does benefit to and uses widely, has solved current base device for solar quartz crucible is fixed, is inconvenient for equipment or dismantlement, uses inconveniently, is unfavorable for using widely's problem.
Description
Technical Field
The invention relates to the technical field of quartz crucibles, in particular to a device for fixing a solar quartz crucible with a detachable base.
Background
With the continuous emphasis and development of environmental protection energy in recent years, solar energy is widely emphasized as a green energy source in various countries in the world, and is widely developed and utilized, which causes the use amount of polysilicon for solar energy conversion to be drastically increased. Thereby promoting the rapid development of polysilicon production, the corresponding large-size thin-wall square fused quartz ceramic crucible dosage is also rapidly increased, and the market prospect of the product is very good internationally. The fused quartz ceramic crucible is widely applied to the industries of polysilicon production and nonferrous metal smelting by the characteristics of good thermal stability, erosion resistance of a refractory body (silicon, aluminum, copper and the like), no pollution to processed products and the like.
The quartz ceramic crucible is a key component of a polysilicon ingot furnace for solar cells, and is used as a container for loading polysilicon raw materials to continuously operate for more than 50 hours at a high temperature of more than 1500 ℃ so as to melt the polysilicon raw materials to produce polysilicon ingots for manufacturing the solar cells. Because of extremely severe use conditions, the crucible has extremely severe requirements on purity, strength, appearance defects, internal quality, high-temperature performance, thermal vibration stability, dimensional accuracy and the like.
At present, the existing base device for fixing the solar quartz crucible is inconvenient to assemble or disassemble, inconvenient to use and unfavorable for popularization and use.
Summary of the invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides the convenient-to-detach base device for fixing the solar quartz crucible, and solves the problems that the existing base device for fixing the solar quartz crucible is inconvenient to assemble or detach, inconvenient to use and inconvenient to popularize and use.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a just dismantle base device for solar quartz crucible is fixed, includes crucible mount, roof and bottom plate, the bottom of crucible mount and the upper surface fixed connection of roof, the bottom of roof is through evenly distributed's I-shaped fixed subassembly and the top fixed connection of bottom plate, be equipped with evenly distributed's crucible mounting groove on the crucible mount, equal fixed connection between every two crucible mounting grooves, every crucible mounting groove's both sides all are equipped with L type fixed plate, L type fixed plate passes through first fastening bolt and the top fixed connection of roof, the recess corresponding with crucible mounting groove bottom is seted up at the top of roof, is equipped with the rubber pad in this recess, and the upper surface of rubber pad contacts with the bottom of crucible mounting groove, I-shaped fixed subassembly includes the I-shaped backup pad, the top fixedly connected with first arris block post of I-shaped backup pad, the bottom fixedly connected with second arris block post of I-shaped backup pad, the bottom of roof is seted up with the first block slot of first arris block post looks adaptation, the top of bottom plate is seted up and is equipped with the second block looks adaptation with the top of bottom plate through first fastening bolt and the top fixed connection of top plate, the bottom plate and the bottom plate through the bottom of top plate and the top of the top plate, the top of the top plate is connected with the top of the top plate is fixed with the top of the top plate through the top of the top plate, the top of the top plate is fixed down, the top plate is connected with the top of the top plate, the bottom of each stainless steel spring is fixedly connected with the top of the bottom plate.
Preferably, the L-shaped fixing plates between every two crucible mounting grooves are clamped with each other.
Preferably, the first prism clamping column of the I-shaped fixing component is clamped in the first clamping groove of the top plate.
Preferably, the second prism clamping column of the I-shaped fixing component is clamped in the second clamping groove of the bottom plate.
Preferably, the bottom section of the crucible installation groove is arc-shaped.
(III) beneficial effects
The invention provides a convenient-to-detach base device for fixing a solar quartz crucible, which has the following beneficial effects:
(1) This a just dismantle base device for solar quartz crucible is fixed, the bottom of roof passes through evenly distributed's I shape fixed subassembly and the top fixed connection of bottom plate, on the one hand, I shape fixed subassembly's first arris card post joint is in the first draw-in groove of roof, on the other hand, I shape fixed subassembly's second arris card post joint is in the second draw-in groove of bottom plate, and the L type fixed plate joint each other between every two crucible mounting grooves, equipment or dismantlement are convenient, convenient to use does benefit to and uses widely, current base device for solar quartz crucible is fixed has been solved, inconvenient equipment or dismantlement, use inconvenience, be unfavorable for the problem of using widely.
(2) This a just dismantle base device for solar quartz crucible is fixed, the both sides of every crucible mounting groove all are equipped with L type fixed plate, L type fixed plate passes through the top fixed connection of first fastening bolt and roof, equipment or dismantles conveniently, on the one hand, I shape fixed component's last backup pad passes through the bottom fixed connection of second fastening bolt and roof, on the other hand, I shape fixed component's lower backup pad passes through the top fixed connection of third fastening bolt and roof, equipment or dismantlement are convenient, convenient to use does benefit to popularization and use, the current base device for solar quartz crucible is fixed has been solved, inconvenient equipment or dismantlement, inconvenient use, be unfavorable for the problem of popularization and use.
(3) This a just dismantle base device for solar quartz crucible is fixed all is equipped with stainless steel spring between the fixed portion both sides of bottom both sides and bottom plate of roof, the top and the bottom fixed connection of roof of every stainless steel spring, the bottom and the top fixed connection of bottom plate of every stainless steel spring, stainless steel spring is the tight state, can assist I shape fixed component, strengthens the joint strength between roof and the bottom plate, does benefit to and uses widely.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
fig. 2 is an enlarged view of a part of the structure of fig. 1 according to the present invention.
In the figure: the crucible fixing device comprises a crucible fixing frame 1, a crucible mounting groove 101, a fixing plate 102L, a first fastening bolt 103, a top plate 2, a bottom plate 3, a 4-I-shaped fixing component, an I-shaped supporting plate 401, an upper supporting plate 4011, a lower supporting plate 4012, a vertical plate 4013, a first prism clamping column 402, a second prism clamping column 403, a second fastening bolt 404, a third fastening bolt 405, a rubber pad 5 and a stainless steel spring 6.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention.
In the description of the invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the creation of the present invention will be understood by those of ordinary skill in the art in light of the specific circumstances.
Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a just, dismantle base device for solar energy quartz crucible is fixed, including crucible mount 1, roof 2 and bottom plate 3, the bottom of crucible mount 1 and the upper surface fixed connection of roof 2, the bottom of roof 2 is through evenly distributed's I shape fixed subassembly 4 and the top fixed connection of bottom plate 3, be equipped with evenly distributed's crucible mounting groove 101 on the crucible mount 1, the bottom cross-section of crucible mounting groove 101 is circular-arcly, equal fixed connection between every two crucible mounting grooves 101, the both sides of every crucible mounting groove 101 all are equipped with L type fixed plate 102, L type fixed plate 102 each other joint between every two crucible mounting grooves 101, L type fixed plate 102 passes through first fastening bolt 103 and the top fixed connection of roof 2, the recess corresponding with crucible mounting groove 101 bottom has been seted up at the top of roof 2, be equipped with rubber pad 5 in this recess, and the upper surface of rubber pad 5 contacts with the bottom of crucible mounting groove 101, the I-shaped fixing component 4 comprises an I-shaped supporting plate 401, a first prism clamping column 402 is fixedly connected to the top of the I-shaped supporting plate 401, a second prism clamping column 403 is fixedly connected to the bottom of the I-shaped supporting plate 401, a first clamping groove matched with the first prism clamping column 402 is formed in the bottom of the top plate 2, the first prism clamping column 402 of the I-shaped fixing component 4 is clamped in the first clamping groove of the top plate 2, a second clamping groove matched with the second prism clamping column 403 is formed in the top of the bottom plate 3, the second prism clamping column 403 of the I-shaped fixing component 4 is clamped in the second clamping groove of the bottom plate 3, the I-shaped supporting plate 401 comprises an upper supporting plate 4011 and a lower supporting plate 4012, the bottoms of the upper supporting plate 4011 and the tops of the lower supporting plate 4012 are fixedly connected through a vertical plate 4013, the upper supporting plate 4011 is fixedly connected with the bottom of the top plate 2 through a second fastening bolt 404, the lower support plate 4012 is fixedly connected with the top of the top plate 2 through a third fastening bolt 405, stainless steel springs 6 are arranged between the two sides of the bottom of the top plate 2 and the two sides of the fixed part of the bottom plate 3, the top end of each stainless steel spring 6 is fixedly connected with the bottom of the top plate 2, the bottom end of each stainless steel spring 6 is fixedly connected with the top of the bottom plate 3, and the stainless steel springs 6 are in a tightening state.
To sum up, this a just dismantle base device for solar quartz crucible is fixed, the bottom of roof 2 is through evenly distributed's I shape fixed subassembly 4 and the top fixed connection of bottom plate 3, on the one hand, I shape fixed subassembly 4's first arris card post 402 joint is in the first draw-in groove of roof 2, on the other hand, I shape fixed subassembly 4's second arris card post 403 joint is in the second draw-in groove of bottom plate 3, and L type fixed plate 102 each other joint between every two crucible mounting grooves 101, equipment or dismantlement are convenient, convenient to use, do benefit to using widely, the problem that current base device for solar quartz crucible is fixed is inconvenient to assemble or dismantle, use inconveniently, be unfavorable for using widely is solved.
The both sides of every crucible mounting groove 101 all are equipped with L type fixed plate 102, L type fixed plate 102 passes through first fastening bolt 103 and the top fixed connection of roof 2, equipment or dismantlement are convenient, on the one hand, the upper support plate 4011 of I shape fixed subassembly 4 passes through second fastening bolt 404 and the bottom fixed connection of roof 2, on the other hand, the bottom suspension fagging 4012 of I shape fixed subassembly 4 passes through third fastening bolt 405 and the top fixed connection of roof 2, equipment or dismantlement are convenient, convenient to use does benefit to popularization and use, the current base device who is used for solar quartz crucible to fix has been solved, inconvenient equipment or dismantlement, inconvenient use, be unfavorable for the problem of popularization and use.
And, all be equipped with stainless steel spring 6 between the bottom both sides of roof 2 and the fixed part both sides of bottom plate 3, the top of every stainless steel spring 6 and the bottom fixed connection of roof 2, the bottom of every stainless steel spring 6 and the top fixed connection of bottom plate 3, stainless steel spring 6 is the state of tightening, can assist I shape fixed component 4, strengthens the joint strength between roof 2 and the bottom plate 3, does benefit to and uses widely.
It should be noted that in the present invention, unless explicitly stated and defined otherwise, a first feature may be "on" or "off" a second feature, either the first and second features being in direct contact, or the first and second features being in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While the invention has been described with reference to the preferred embodiments, it should be understood that the invention is not limited to the embodiments described above, but is intended to cover modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (5)
1. The utility model provides a just dismantle base device for solar quartz crucible is fixed, includes crucible mount (1), roof (2) and bottom plate (3), its characterized in that: the bottom of the crucible fixing frame (1) is fixedly connected with the upper surface of the top plate (2), the bottom of the top plate (2) is fixedly connected with the top of the bottom plate (3) through uniformly distributed I-shaped fixing assemblies (4), uniformly distributed crucible mounting grooves (101) are formed in the crucible fixing frame (1), each two crucible mounting grooves (101) are fixedly connected, L-shaped fixing plates (102) are respectively arranged on two sides of each crucible mounting groove (101), the L-shaped fixing plates (102) are fixedly connected with the top of the top plate (2) through first fastening bolts (103), grooves corresponding to the bottoms of the crucible mounting grooves (101) are formed in the tops of the top plate (2), rubber pads (5) are arranged in the grooves, the upper surfaces of the rubber pads (5) are in contact with the bottoms of the crucible mounting grooves (101), the I-shaped fixing assemblies (4) comprise I-shaped supporting plates (401), first prism clamping columns (402) are fixedly connected to the tops of each two crucible mounting grooves (101), second prism clamping columns (403) are fixedly connected to the bottoms of the I-shaped supporting plates (401), the bottoms of the first prism clamping columns (403) are provided with the bottoms of the second prism clamping columns (403), the bottoms of the first prism clamping columns (403) are matched with the bottoms of the second prism clamping columns, i shape backup pad (401) include backup pad (4011) and lower backup pad (4012), the bottom of going up backup pad (4011) and the top of lower backup pad (4012) pass through riser (4013) fixed connection, go up backup pad (4011) through second fastening bolt (404) and the bottom fixed connection of roof (2), the top fixed connection of lower backup pad (4012) through third fastening bolt (405) and bottom plate (3), all be equipped with stainless steel spring (6) between the bottom both sides of roof (2) and the top both sides of bottom plate (3), every the top of stainless steel spring (6) and the bottom fixed connection of roof (2), every the bottom of stainless steel spring (6) and the top fixed connection of bottom plate (3).
2. The detachable base device for fixing a solar quartz crucible according to claim 1, wherein: the L-shaped fixing plates (102) between every two crucible mounting grooves (101) are clamped with each other.
3. The detachable base device for fixing a solar quartz crucible according to claim 1, wherein: the first prism clamping columns (402) of the I-shaped fixing assemblies (4) are clamped in the first clamping grooves of the top plate (2).
4. The detachable base device for fixing a solar quartz crucible according to claim 1, wherein: the second prism clamping columns (403) of the I-shaped fixing assembly (4) are clamped in the second clamping grooves of the bottom plate (3).
5. The detachable base device for fixing a solar quartz crucible according to claim 1, wherein: the bottom section of the crucible installation groove (101) is arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711204905.0A CN107779949B (en) | 2017-11-27 | 2017-11-27 | A just dismantle base device for solar quartz crucible is fixed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711204905.0A CN107779949B (en) | 2017-11-27 | 2017-11-27 | A just dismantle base device for solar quartz crucible is fixed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107779949A CN107779949A (en) | 2018-03-09 |
| CN107779949B true CN107779949B (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711204905.0A Active CN107779949B (en) | 2017-11-27 | 2017-11-27 | A just dismantle base device for solar quartz crucible is fixed |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000111267A (en) * | 1998-10-08 | 2000-04-18 | Tokyo Yogyo Co Ltd | Crucible stand |
| CN201949886U (en) * | 2010-10-29 | 2011-08-31 | 长沙开元仪器股份有限公司 | Crucible frame for coal property analyzer |
| CN206253148U (en) * | 2016-12-08 | 2017-06-16 | 杨明伟 | It is easy to fixed drug inspection crucible |
| CN206454679U (en) * | 2016-12-21 | 2017-09-01 | 六盘水师范学院 | It is a kind of can quick fetching tripod |
| CN207738891U (en) * | 2017-11-27 | 2018-08-17 | 镇江市高等专科学校 | One kind just dismantling base device for solar energy quartz crucible to be fixed |
-
2017
- 2017-11-27 CN CN201711204905.0A patent/CN107779949B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000111267A (en) * | 1998-10-08 | 2000-04-18 | Tokyo Yogyo Co Ltd | Crucible stand |
| CN201949886U (en) * | 2010-10-29 | 2011-08-31 | 长沙开元仪器股份有限公司 | Crucible frame for coal property analyzer |
| CN206253148U (en) * | 2016-12-08 | 2017-06-16 | 杨明伟 | It is easy to fixed drug inspection crucible |
| CN206454679U (en) * | 2016-12-21 | 2017-09-01 | 六盘水师范学院 | It is a kind of can quick fetching tripod |
| CN207738891U (en) * | 2017-11-27 | 2018-08-17 | 镇江市高等专科学校 | One kind just dismantling base device for solar energy quartz crucible to be fixed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107779949A (en) | 2018-03-09 |
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