CN117006712A - Vacuum heat-collecting outer glass tube and preparation method thereof - Google Patents
Vacuum heat-collecting outer glass tube and preparation method thereof Download PDFInfo
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- CN117006712A CN117006712A CN202310980263.2A CN202310980263A CN117006712A CN 117006712 A CN117006712 A CN 117006712A CN 202310980263 A CN202310980263 A CN 202310980263A CN 117006712 A CN117006712 A CN 117006712A
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- glass
- glass tube
- sealing
- vacuum heat
- outer glass
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- 239000011521 glass Substances 0.000 title claims abstract description 139
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 77
- 229910000833 kovar Inorganic materials 0.000 claims abstract description 43
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 37
- 239000000956 alloy Substances 0.000 claims abstract description 37
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 30
- 239000011733 molybdenum Substances 0.000 claims abstract description 30
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000000137 annealing Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 13
- 239000001257 hydrogen Substances 0.000 claims description 13
- 229910052739 hydrogen Inorganic materials 0.000 claims description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 230000004927 fusion Effects 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 238000007537 lampworking Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 7
- 230000007704 transition Effects 0.000 abstract description 5
- 230000035882 stress Effects 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000563 Verneuil process Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
- C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/20—Uniting glass pieces by fusing without substantial reshaping
- C03B23/207—Uniting glass rods, glass tubes, or hollow glassware
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Glass Compositions (AREA)
Abstract
The invention relates to the technical field of outer glass tubes of vacuum heat collection tubes, in particular to a vacuum heat collection outer glass tube and a preparation method thereof. The outer glass tube is formed by sequentially sealing a kovar alloy ring with a molybdenum glass group, 3# glass and a 4.0 glass tube; the thermal expansion coefficient of the kovar alloy ring is 4.8-4.9x10 ‑6 The thermal expansion coefficient of the molybdenum glass group is 4.7-4.8X10 at the temperature of/DEG C ‑6 3# glass having a thermal expansion coefficient of 4.45 to 4.55X10 at/DEGC ‑6 Thermal expansion coefficient of 4.0X10 for 4.0 glass tube ‑6 In the sealing process of the outer glass tube, the outer glass tube is only sealed for 3 times, so that the sealing times of 2 segments are reduced, and the sealing is realizedThe efficiency is doubled, and the kovar alloy ring does not need to be turned into a thin edge, so that the sealing difficulty and the sealing cost are reduced. Meanwhile, the structural stress after annealing is eliminated by matching and sealing of the 4J29 kovar and molybdenum glass, and the hidden trouble of vacuum failure is reduced. Solves the problems of multiple transition glass types, multiple sealing times, complex process, low production efficiency, hidden vacuum ageing hazards, high sealing difficulty and high processing cost in the prior art.
Description
Technical Field
The invention relates to the technical field of outer glass tubes of vacuum heat collection tubes, in particular to a vacuum heat collection outer glass tube and a preparation method thereof.
Background
The metal-glass flame sealing processing outer glass tube is a main mode of producing the outer glass tube for the vacuum heat collection tube at present, and is mainly prepared in two modes, namely, the mode of sequentially sealing 3 transition glasses by adopting 4J29 kovar alloy and then carrying out flame sealing with 3.3 borosilicate glass to form the outer glass tube is adopted, and the outer glass tube is required to be sealed along with the gradient of the change of the expansion coefficient, so that the outer glass tube is prepared with more transition glass types, more sealing times, complex process and low production efficiency. Or a coefficient of expansion of 4.0X10 -6 Novel constant expansion alloy with temperature of/DEG C and glass expansion coefficient of 4.0X10 -6 The glass tube flame fusion sealing at the temperature of/DEG C is prepared in a mode of forming an outer glass tube, the mode reduces the types of transition glass and reduces the sealing times, but the novel fixed expansion alloy and glass expansion curve matching temperature range is narrow, the structural stress after annealing of a fusion sealing piece is large, the hidden danger of vacuum failure exists, and meanwhile, the sealing alloy ring is required to be turned into a thin edge, the sealing difficulty is high, and the processing cost is high.
Disclosure of Invention
Aiming at the problems of multiple transition glass types, multiple sealing times, complex process, low production efficiency, vacuum ageing hidden danger, high sealing difficulty and high processing cost in the prior art, the invention provides the vacuum heat collection outer glass tube and the preparation method thereof.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the invention provides a vacuum heat collection outer glass tube, which comprises a kovar alloy ring, wherein the kovar alloy ring is used for sequentially sealing a molybdenum glass group, 3# glass and a 4.0 glass tube; wherein the kovar ringThe thermal expansion coefficient is 4.8-4.9X10 -6 The thermal expansion coefficient of the molybdenum glass group is 4.7-4.8X10 at the temperature of/DEG C -6 3# glass having a thermal expansion coefficient of 4.45 to 4.55X10 at/DEGC -6 Thermal expansion coefficient of 4.0X10 for 4.0 glass tube -6 /℃。
Further, the 3# glass comprises the following raw material components in parts by weight: 67% -71% of SiO 2 18 to 25 percent of B 2 O 3 3 to 5 percent of ZnO and 2 to 4 percent of Na 2 O, 1-3% Al 2 O 3 And 0.1 to 0.5% Li 2 O。
Preferably, the kovar ring is 4J29 kovar.
Preferably, flame processing and sealing are adopted between the kovar alloy ring and the molybdenum glass group, between the molybdenum glass group and the 3# glass and between the 3# glass and the 4.0 glass tube.
The preparation method of the vacuum heat collection outer glass tube comprises the following steps:
s1: carrying out hydrogen burning treatment on the kovar alloy ring;
s2: preheating a molybdenum glass group and a kovar alloy ring after hydrogen burning, and performing flame sealing treatment;
s3: sequentially carrying out flame sealing treatment on the molybdenum glass group which is subjected to sealing treatment with the Kovar alloy ring and a 3# glass and 4.0 glass tube to prepare a vacuum heat collection outer glass tube;
s4: and annealing the vacuum heat collection outer glass tube after the fusion sealing treatment, thus completing the preparation of the vacuum heat collection outer glass tube.
Further, the hydrogen burning treatment temperature in S1 is 800-1300 ℃.
Further, the annealing temperature in S4 is 510 ℃, and the annealing time is 35-45 min.
Further, the annealing temperature rising rate in S4 is 4-6 ℃/min, and the annealing temperature reducing rate in S4 is 1-4 ℃/min.
Preferably, the condition of the flame sealing treatment in S2 or S3 is that natural gas sealing is adopted, the flame temperature is 780-830 ℃, and the sealing time is 2-3 min.
Preferably, the condition of the flame sealing treatment in S2 or S3 is that the flame sealing treatment is carried out by adopting a mode of burning hydrogen and oxygen, the flame temperature is between 850 and 890 ℃, and the sealing time is between 1 and 2 minutes.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a vacuum heat-collecting outer glass tube, which is formed by sequentially sealing a kovar alloy ring with a molybdenum glass group, 3# glass and a 4.0 glass tube; the thermal expansion coefficient of the kovar alloy ring is 4.8-4.9x10 -6 The thermal expansion coefficient of the molybdenum glass group is 4.7-4.8X10 at the temperature of/DEG C -6 3# glass having a thermal expansion coefficient of 4.45 to 4.55X10 at/DEGC -6 Thermal expansion coefficient of 4.0X10 for 4.0 glass tube -6 In the sealing process of the outer glass tube, the sealing frequency is reduced by 3 times, the sealing efficiency is doubled, the kovar alloy ring does not need to be turned into a thin edge, and the sealing difficulty and the sealing cost are reduced. Meanwhile, the structural stress after annealing is eliminated by matching and sealing of the 4J29 kovar and molybdenum glass, and the hidden trouble of vacuum failure is reduced.
The application of the 3# glass can ensure that the outer glass tube has good chemical stability, light transmittance and sealing matching property while meeting the thermal expansion coefficient required by the outer glass tube, and can reduce the melting temperature of the glass.
The invention also provides a preparation method of the vacuum heat collection outer glass tube, which only needs to burn hydrogen for the kovar alloy ring; preheating a molybdenum glass group and a kovar alloy ring subjected to hydrogen burning, performing flame processing and sealing treatment, and sequentially performing flame sealing treatment on the molybdenum glass group, the 3# glass and a 4.0 glass tube after the kovar alloy ring is sealed, so as to prepare a vacuum heat collection outer glass tube; and finally, annealing the vacuum heat collection outer glass tube after the fusion sealing treatment, thus completing the preparation of the vacuum heat collection outer glass tube. The sealing process is simple, the technical requirement is reduced, the sealing efficiency is improved, the original 5-channel transitional sealing is changed into 3-channel sealing, and the production efficiency is improved to 2 times; the sealing product is safe and reliable, the service life of the product is long, and the mechanical strength and the light transmission performance of the sealing part are good.
Drawings
Fig. 1 is a schematic view of a vacuum heat-collecting outer glass tube according to the present invention.
FIG. 2 is a flow chart of a method for manufacturing a vacuum heat-collecting outer glass tube.
Wherein, the glass tube comprises a 1-kovar alloy ring, a 2-molybdenum glass group, 3-3# glass and a 4-4.0 glass tube.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
The invention discloses a vacuum heat collection outer glass tube, referring to FIG. 1, comprising a kovar alloy ring 1, wherein the kovar alloy ring 1 is sequentially sealed with a molybdenum glass group 2, a 3# glass 3 and a 4.0 glass tube 4; wherein the kovar alloy ring 1 is 4J29 kovar alloy, and the thermal expansion coefficient of the kovar alloy ring 1 is 4.8-4.9 multiplied by 10 -6 The thermal expansion coefficient of the molybdenum glass group 2 is 4.7-4.8X10 at the temperature of/DEG C -6 3# glass 3 having a thermal expansion coefficient of 4.45 to 4.55X10 at/DEGC -6 The thermal expansion coefficient of the 4.0 glass tube 4 was 4.0X10 at/. Degree.C -6 and/C. The kovar alloy ring 1, the molybdenum glass group 2 and the 3# glass 3 are symmetrically distributed along the 4.0 glass tube 4. Preferably, flame processing and sealing are adopted between the gold ring 1 and the molybdenum glass group 2, between the molybdenum glass group 2 and the 3# glass 3 and between the 3# glass 3 and the 4.0 glass tube 4.
The 3# glass 3 comprises the following raw material components: 67-71% SiO 2 18 to 25 percent of B 2 O 3 3 to 5 percent of ZnO and 2 to 4 percent of Na 2 O, 1-3% Al 2 O 3 And 0.1 to 0.5% Li 2 O. The preparation method comprises the following steps: mixing the above materials at a certain ratioPreserving heat for 4-6 h at 1150-1250 ℃, then heating to 1395-1415 ℃ at a speed of 0.3-1 ℃/min for melting until the raw materials are completely melted to form glass liquid, clarifying for 30-40 h at 1250-1350 ℃, blowing at 1150-1250 ℃, annealing for 2-3 h at 540-560 ℃ to obtain the 3# glass 3.
Referring to fig. 2, the invention provides a preparation method of the vacuum heat collection outer glass tube, which comprises the following steps:
s1: carrying out hydrogen burning treatment on the kovar alloy ring 1, wherein the hydrogen burning treatment temperature is 800-1300 ℃;
s2: preheating the molybdenum glass group 2 and the hydrogen-burned kovar alloy ring 1, and performing flame processing and sealing treatment; the medium flame sealing treatment is carried out by adopting natural gas sealing at the flame temperature of 780-830 ℃ for 2-3 min or adopting hydrogen and oxygen combustion mode for sealing at the flame temperature of 850-890 ℃ for 1-2 min.
S3: the molybdenum glass group 2 which is subjected to sealing treatment with the kovar alloy ring 1 is sequentially subjected to flame sealing treatment with a 3# glass 3 and a 4.0 glass tube 4 to prepare a vacuum heat collection outer glass tube; the medium flame sealing treatment is carried out by adopting natural gas sealing at the flame temperature of 780-830 ℃ for 2-3 min or adopting hydrogen and oxygen combustion mode for sealing at the flame temperature of 850-890 ℃ for 1-2 min.
S4: and (3) annealing the vacuum heat collection outer glass tube after the fusion sealing treatment, namely completing the preparation of the vacuum heat collection outer glass tube, wherein the annealing temperature rise rate is 4-6 ℃/min, the annealing temperature is 510 ℃, the annealing time is 35-45 min, and the annealing cooling rate is 1-4 ℃/min.
In summary, the invention provides a vacuum heat-collecting outer glass tube and a preparation method thereof, wherein the outer glass tube is formed by sequentially sealing a kovar alloy ring 1 with a molybdenum glass group 2, a 3# glass 3 and a 4.0 glass tube 4; in the sealing process of the outer glass tube, only 3 times of sealing are needed, the sealing times of 2 segments are reduced, the sealing efficiency is doubled, the kovar alloy ring does not need to be turned into a thin edge, and the sealing difficulty and the sealing cost are reduced. Meanwhile, the structural stress after annealing is eliminated by matching and sealing of the 4J29 kovar and molybdenum glass, and the hidden trouble of vacuum failure is reduced.
The foregoing description of the preferred embodiment of the present invention is not intended to limit the technical solution of the present invention in any way, and it should be understood that the technical solution can be modified and replaced in several ways without departing from the spirit and principle of the present invention, and these modifications and substitutions are also included in the protection scope of the claims.
Claims (10)
1. The vacuum heat collection outer glass tube is characterized by comprising a kovar alloy ring (1), wherein the kovar alloy ring (1) is sequentially sealed with a molybdenum glass group (2), 3# glass (3) and a 4.0 glass tube (4); wherein the thermal expansion coefficient of the kovar alloy ring (1) is 4.8-4.9X10 -6 The thermal expansion coefficient of the molybdenum glass group (2) is 4.7-4.8X10 at the temperature of every DEG C -6 The thermal expansion coefficient of the 3# glass (3) is 4.45 to 4.55X10 at a temperature of/DEG C -6 The thermal expansion coefficient of the 4.0 glass tube (4) is 4.0X10 -6 /℃。
2. The vacuum heat collection outer glass tube according to claim 1, wherein the 3# glass (3) comprises the following raw material components in parts by weight: 67% -71% of SiO 2 18 to 25 percent of B 2 O 3 3 to 5 percent of ZnO and 2 to 4 percent of Na 2 O, 1-3% Al 2 O 3 And 0.1 to 0.5% Li 2 O。
3. The evacuated collector tube as set forth in claim 1 wherein said kovar ring is 4J29 kovar.
4. A evacuated collector outer glass tube according to any one of claims 1-3, wherein flame working seals are employed between the kovar ring (1) and the molybdenum glass set (2), between the molybdenum glass set (2) and the 3# glass (3), and between the 3# glass (3) and the 4.0 glass tube (4).
5. The method for manufacturing a evacuated collector tube as claimed in any one of claims 1 to 4, comprising the steps of:
s1: carrying out hydrogen burning treatment on the kovar alloy ring (1);
s2: preheating a molybdenum glass group (2) and a hydrogen-fired kovar alloy ring (1), and performing flame sealing treatment;
s3: the molybdenum glass group (2) which is subjected to sealing treatment with the Kovar alloy ring (1) is sequentially subjected to flame sealing treatment with the 3# glass (3) and the 4.0 glass tube (4) to prepare a vacuum heat collection outer glass tube;
s4: and annealing the vacuum heat collection outer glass tube after the fusion sealing treatment, thus completing the preparation of the vacuum heat collection outer glass tube.
6. The method for manufacturing a vacuum heat-collecting outer glass tube according to claim 5, wherein the hydrogen burning treatment temperature in S1 is 800-1300 ℃.
7. The method for manufacturing a vacuum heat-collecting outer glass tube according to claim 5, wherein the annealing temperature in S4 is 510 ℃ and the annealing time is 35-45 min.
8. The method for manufacturing the vacuum heat-collecting outer glass tube according to claim 5, wherein the annealing temperature rise rate in S4 is 4-6 ℃/min, and the annealing temperature reduction rate in S4 is 1-4 ℃/min.
9. The method for manufacturing the evacuated collector tube according to any one of claims 5 to 8, wherein the flame sealing treatment in S2 or S3 is performed by using natural gas for sealing at a flame temperature of 780 to 830 ℃ for 2 to 3 minutes.
10. The method for manufacturing a vacuum heat collection outer glass tube according to any one of claims 5 to 8, wherein the condition of the flame sealing treatment in S2 or S3 is that the flame sealing treatment is carried out by adopting a mode of burning hydrogen and oxygen, the flame temperature is between 850 and 890 ℃, and the sealing time is between 1 and 2 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310980263.2A CN117006712A (en) | 2023-08-04 | 2023-08-04 | Vacuum heat-collecting outer glass tube and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310980263.2A CN117006712A (en) | 2023-08-04 | 2023-08-04 | Vacuum heat-collecting outer glass tube and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN117006712A true CN117006712A (en) | 2023-11-07 |
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|---|---|---|---|
| CN202310980263.2A Pending CN117006712A (en) | 2023-08-04 | 2023-08-04 | Vacuum heat-collecting outer glass tube and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239789A (en) * | 2008-02-03 | 2008-08-13 | 南京三乐电子信息产业集团有限公司 | High temperature heat-collecting pipe hard glass and Kovar alloy sealing method |
| CN101798184A (en) * | 2010-02-26 | 2010-08-11 | 北京天瑞星真空技术开发有限公司 | Sealing connection method of metal and glass of novel medium-high temperature solar energy heat collection pipe |
| CN102515522A (en) * | 2011-12-08 | 2012-06-27 | 山东力诺新材料有限公司 | Borosilicate glass, glass-metal coupled sealing connection member, and preparation method and use of the glass-metal coupled sealing connection member |
| CN107628759A (en) * | 2017-10-25 | 2018-01-26 | 上海容东激光科技有限公司 | A kind of burn-back technique of kovar alloy and hard glass |
| CN110553407A (en) * | 2019-09-24 | 2019-12-10 | 陕西宝光真空电器股份有限公司 | Sealing method of outer glass tube for medium-high temperature vacuum heat collecting tube |
-
2023
- 2023-08-04 CN CN202310980263.2A patent/CN117006712A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239789A (en) * | 2008-02-03 | 2008-08-13 | 南京三乐电子信息产业集团有限公司 | High temperature heat-collecting pipe hard glass and Kovar alloy sealing method |
| CN101798184A (en) * | 2010-02-26 | 2010-08-11 | 北京天瑞星真空技术开发有限公司 | Sealing connection method of metal and glass of novel medium-high temperature solar energy heat collection pipe |
| CN102515522A (en) * | 2011-12-08 | 2012-06-27 | 山东力诺新材料有限公司 | Borosilicate glass, glass-metal coupled sealing connection member, and preparation method and use of the glass-metal coupled sealing connection member |
| CN107628759A (en) * | 2017-10-25 | 2018-01-26 | 上海容东激光科技有限公司 | A kind of burn-back technique of kovar alloy and hard glass |
| CN110553407A (en) * | 2019-09-24 | 2019-12-10 | 陕西宝光真空电器股份有限公司 | Sealing method of outer glass tube for medium-high temperature vacuum heat collecting tube |
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