CN109052932A - A kind of glass tube and preparation method thereof for solar energy vacuum tube - Google Patents
A kind of glass tube and preparation method thereof for solar energy vacuum tube Download PDFInfo
- Publication number
- CN109052932A CN109052932A CN201811011179.5A CN201811011179A CN109052932A CN 109052932 A CN109052932 A CN 109052932A CN 201811011179 A CN201811011179 A CN 201811011179A CN 109052932 A CN109052932 A CN 109052932A
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- CN
- China
- Prior art keywords
- glass tube
- solar energy
- preparation
- energy vacuum
- glass
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B15/00—Drawing glass upwardly from the melt
- C03B15/14—Drawing tubes, cylinders, or rods from the melt
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
Abstract
The glass tube and preparation method thereof that the invention discloses a kind of for solar energy vacuum tube, the glass tube comprise the following raw materials by weight percent: 11.5~16%B2O3, 8~9.5%Na2O, 7~8%Bi2O3, 0.5~1%CaO, 0.5~1%MgO, 0.5~1%ZnO, 0.1~0.5%Li2O, remaining is SiO2.The preparation method include sorting-stir and evenly mix-melting-is drawn into pipe-annealing totally five step.The glass tube have with thermal expansion coefficient similar in the conventional use of metal of solar water heater, higher softening point and stronger cold-and-heat resistent impact property, preparation method is simple and easy, be suitable for promote.
Description
Technical field
The invention belongs to solar energy vacuum tube preparation fields, and in particular to a kind of glass tube for solar energy vacuum tube and
Preparation method.
Background technique
Solar water heater is the heating device for converting solar energy to thermal energy, by water from low-temperature heat to high temperature, with
Meet hot water of the people in life, production to use.Solar water heater is divided into vacuum pipe solar water by structure type
Device and flat solar water heater, mainly based on vacuum pipe solar water heater.Electron tubes type domestic solar hot water
Device is made of the related spare and accessory parts such as thermal-collecting tube, water tank and bracket, and solar energy is converted into thermal energy and relies primarily on vacuum heat-collecting
Pipe, the principle that evacuated collector tube utilizes hot water floating cold water to sink make water generate microcirculation and obtain required hot water.Vacuum tube is
The core of solar water heater, the glass liner for vacuum flask of for example same elongation of structure are vacuum between ectonexine.In the table of inner glass tube
It is coated with spectral selective absorbing coating using special warfare on face, is used to absorb solar radiant energy to greatest extent.
(such as stainless steel is swollen in 20~400 DEG C of heat with metal used in water heater for traditional solar energy evacuated effective glass tube
Swollen coefficient is about 12 × 10-6/ DEG C) larger, the envelope of machining and glass-metal to metal sealing part of thermal expansion coefficient difference
Connection technology requirement is high, is unfavorable for the demand of industrialized production processing.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of for the glass tube of solar energy vacuum tube and its preparation side
Method, the glass tube have with thermal expansion coefficient similar in the conventional use of metal of solar water heater, higher softening point and
Stronger cold-and-heat resistent impact property, preparation method is simple and easy, is suitable for promoting.
The present invention is achieved by the following technical solutions:
A kind of glass tube for solar energy vacuum tube, the glass tube comprise the following raw materials by weight percent:
11.5~16%B2O3, 8~9.5%Na2O, 7~8%Bi2O3, 0.5~1%CaO, 0.5~1%MgO, 0.5~1%ZnO, 0.1
~0.5%Li2O, remaining is SiO2。
A kind of preparation method of the glass tube for solar energy vacuum tube, comprising the following steps:
Step 1) weighs each component raw material spare respectively in proportion；
The raw material that step 1) prepares is mixed evenly under room temperature step 2) in blender；
The raw material mixed through step 2) is transferred in high-temperature smelting pot by step 3), is smelted into uniform glass metal；
The glass metal of the step 4) step 3) fusing is drawn into glass metal by drawing machine automatically into drawing machine
Tubulose；
Step 5) in the lehr anneals to glass tube, that is, the glass tube for being used for solar energy vacuum tube is made.
Preferably, the mixing speed of the step 2) mixing be 200~300r/min, mixing time be 30~
45min。
Preferably, the temperature of the step 3) high melt is 1800~2000 DEG C, 6~8h of duration.
Preferably, temperature maintains 1000~1200 DEG C in the step 4) drawing machine, and inlet amount is 90~120L/min.
Preferably, the first section temperature of the step 5) annealing is 550~700 DEG C, and latter end temperature is 30~50 DEG C, when annealing
Between be 3~5h.
Beneficial effects of the present invention are as follows:
Glass tube for solar energy vacuum tube of the invention, with the average linear coefficient of expansion (10.0~10.5) ×
10-6/ DEG C (20~400 DEG C), higher softening point (750 DEG C of >) and stronger cold-and-heat resistent impact property (250 DEG C of Δ T >), with
The matched seal of solar water heater common metal material is functional, therefore connection sealing is more reliable between closure,
Preparation method is simple and easy, is suitable for promoting.
Specific embodiment
The present invention is further elaborated below with reference to embodiment.
Embodiment 1
A kind of glass tube for solar energy vacuum tube, the glass tube comprise the following raw materials by weight percent:
68.5%SiO2, 11.5%B2O3, 9.5%Na2O, 7%Bi2O3, 1%CaO, 1%MgO, 1%ZnO, 0.5%Li2O。
Preparation method includes the following steps:
(1) each component raw material of aforementioned proportion is weighed respectively spare.
(2) raw material prepared is mixed evenly under room temperature in blender, the mixing speed of blender is 200r/
Min, mixing time 45min.
(3) mixture is transferred in high-temperature smelting pot, at 1800 DEG C, melting 8h forms uniform glass metal.
(4) glass metal melted is automatically into drawing machine, and temperature maintains 1000 DEG C, inlet amount 90L/min, by glass
Glass liquid is drawn into tubulose.
(5) it anneals in the lehr to glass tube, first section temperature is 550 DEG C, and latter end temperature is 30 DEG C, annealing time
For 3h.The glass tube for being used for solar energy vacuum tube is made after coming out of the stove.
Embodiment 2
A kind of glass tube for solar energy vacuum tube, the glass tube comprise the following raw materials by weight percent:
66.4%SiO2, 16%B2O3, 8%Na2O, 8%Bi2O3, 0.5%CaO, 0.5%MgO, 0.5%ZnO, 0.1%Li2O。
Preparation method includes the following steps:
(1) each component raw material of aforementioned proportion is weighed respectively spare.
(2) raw material prepared is mixed evenly under room temperature in blender, the mixing speed of blender is 300r/
Min, mixing time 30min.
(3) mixture is transferred in high-temperature smelting pot, at 2000 DEG C, melting 6h forms uniform glass metal.
(4) for the glass metal melted automatically into drawing machine, temperature maintains 1200 DEG C, inlet amount 120L/min, will
Glass metal is drawn into tubulose.
(5) it anneals in the lehr to glass tube, first section temperature is 700 DEG C, and latter end temperature is 50 DEG C, annealing time
For 5h.The glass tube for being used for solar energy vacuum tube is made after coming out of the stove.
Embodiment 3
A kind of glass tube for solar energy vacuum tube, the glass tube comprise the following raw materials by weight percent:
68%SiO2, 13%B2O3, 9%Na2O, 7.5%Bi2O3, 0.7%CaO, 0.8%MgO, 0.6%ZnO, 0.4%Li2O。
Preparation method includes the following steps:
(1) each component raw material of aforementioned proportion is weighed respectively spare.
(2) raw material prepared is mixed evenly under room temperature in blender, the mixing speed of blender is 250r/
Min, mixing time 40min.
(3) mixture is transferred in high-temperature smelting pot, at 1900 DEG C, melting 7h forms uniform glass metal.
(4) for the glass metal melted automatically into drawing machine, temperature maintains 1100 DEG C, inlet amount 100L/min, will
Glass metal is drawn into tubulose.
(5) it anneals in the lehr to glass tube, first section temperature is 600 DEG C, and latter end temperature is 40 DEG C, annealing time
For 4h.The glass tube for being used for solar energy vacuum tube is made after coming out of the stove.
Test case 1
The glass tube that solar energy vacuum tube is used for made from Examples 1 to 3 is tested for the property, test result is as follows table
1。
1 performance test of table
Claims (6)
1. a kind of glass tube for solar energy vacuum tube, which is characterized in that the glass tube by following weight percent original
Material composition: 11.5~16%B2O3, 8~9.5%Na2O, 7~8%Bi2O3, 0.5~1%CaO, 0.5~1%MgO, 0.5~1%
ZnO, 0.1~0.5%Li2O, remaining is SiO2。
2. a kind of preparation method of glass tube for solar energy vacuum tube described in claim 1, which is characterized in that including with
Lower step:
Step 1) weighs each component raw material spare respectively in proportion；
The raw material that step 1) prepares is mixed evenly under room temperature step 2) in blender；
The raw material mixed through step 2) is transferred in high-temperature smelting pot by step 3), is smelted into uniform glass metal；
Glass metal is drawn into pipe by drawing machine automatically into drawing machine by the glass metal of the step 4) step 3) fusing
Shape；
Step 5) in the lehr anneals to glass tube, that is, the glass tube for being used for solar energy vacuum tube is made.
3. a kind of preparation method of glass tube for solar energy vacuum tube according to claim 2, which is characterized in that step
The mixing speed of rapid 2) the described mixing is 200~300r/min, and mixing time is 30~45min.
4. a kind of preparation method of glass tube for solar energy vacuum tube according to claim 2, which is characterized in that step
The temperature of rapid 3) the described high melt is 1800~2000 DEG C, 6~8h of duration.
5. a kind of preparation method of glass tube for solar energy vacuum tube according to claim 2, which is characterized in that step
Temperature maintains 1000~1200 DEG C in rapid 4) the described drawing machine, and inlet amount is 90~120L/min.
6. a kind of preparation method of glass tube for solar energy vacuum tube according to claim 2, which is characterized in that step
The first section temperature of rapid 5) the described annealing is 550~700 DEG C, and latter end temperature is 30~50 DEG C, and annealing time is 3~5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011179.5A CN109052932A (en) | 2018-08-31 | 2018-08-31 | A kind of glass tube and preparation method thereof for solar energy vacuum tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011179.5A CN109052932A (en) | 2018-08-31 | 2018-08-31 | A kind of glass tube and preparation method thereof for solar energy vacuum tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109052932A true CN109052932A (en) | 2018-12-21 |
Family
ID=64758981
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811011179.5A Pending CN109052932A (en) | 2018-08-31 | 2018-08-31 | A kind of glass tube and preparation method thereof for solar energy vacuum tube |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4520115A (en) * | 1982-08-02 | 1985-05-28 | Schott Glaswerke | High absorbance Pb-containing glass for cathode ray tube picture screen |
| CN1446767A (en) * | 2002-03-14 | 2003-10-08 | 日本电气硝子株式会社 | Glass preforming blank and its prodn. method |
| CN102951840A (en) * | 2011-08-12 | 2013-03-06 | 肖特公开股份有限公司 | Arsenic-free and antimony-free borosilicate glass with titanium dioxide and preparation method thereof |
| CN103626398A (en) * | 2013-12-13 | 2014-03-12 | 福州大学 | Devitrification type lead-free low-temperature sealing glass as well as preparation method and application method thereof |
| WO2017188015A1 (en) * | 2016-04-28 | 2017-11-02 | 日本電気硝子株式会社 | Glass tube for metal sealing and glass for metal sealing |
| CN108455842A (en) * | 2018-02-10 | 2018-08-28 | 山东东方伟民新热力科技有限公司 | A kind of production method of borosilicate glass, glass tube and glass tube |
-
2018
- 2018-08-31 CN CN201811011179.5A patent/CN109052932A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4520115A (en) * | 1982-08-02 | 1985-05-28 | Schott Glaswerke | High absorbance Pb-containing glass for cathode ray tube picture screen |
| CN1446767A (en) * | 2002-03-14 | 2003-10-08 | 日本电气硝子株式会社 | Glass preforming blank and its prodn. method |
| CN102951840A (en) * | 2011-08-12 | 2013-03-06 | 肖特公开股份有限公司 | Arsenic-free and antimony-free borosilicate glass with titanium dioxide and preparation method thereof |
| CN103626398A (en) * | 2013-12-13 | 2014-03-12 | 福州大学 | Devitrification type lead-free low-temperature sealing glass as well as preparation method and application method thereof |
| WO2017188015A1 (en) * | 2016-04-28 | 2017-11-02 | 日本電気硝子株式会社 | Glass tube for metal sealing and glass for metal sealing |
| CN108455842A (en) * | 2018-02-10 | 2018-08-28 | 山东东方伟民新热力科技有限公司 | A kind of production method of borosilicate glass, glass tube and glass tube |
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Application publication date: 20181221 |