CN102092938A - Glass used for liquid level observation window of level gauge and level gauge - Google Patents
Glass used for liquid level observation window of level gauge and level gauge Download PDFInfo
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- CN102092938A CN102092938A CN2010102978082A CN201010297808A CN102092938A CN 102092938 A CN102092938 A CN 102092938A CN 2010102978082 A CN2010102978082 A CN 2010102978082A CN 201010297808 A CN201010297808 A CN 201010297808A CN 102092938 A CN102092938 A CN 102092938A
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Abstract
The invention provides a glass used for a liquid level observation window of a level gauge and a level gauge, which are advantaged by no corrosion in long-term use and excellent alkali resistance. In the glass used for the liquid level observation window of the level gauge, the level gauge uses a liquid column to represent a liquid level, and the liquid level is observed via observation of the liquid column via the liquid level observation window, the glass used for the liquid level observation window of the level gauge is characterized by comprising: 20-30wt% of SiO2, 15-20 wt% of Al203, 25-30 wt % of Y2O3, 15-20wt% of La2O3, 4-10wt% of TiO2, and 5-10wt% of ZrO2.
Description
Technical field
The present invention relates to a kind of glass of window of the demonstration liquid level that is used for liquid level meter, particularly the glazing of the liquid level meter of alkali resistance excellence.
Background technology
In the prior art, the water tank in boiler and workshop is provided with the liquid level meter that is used to observe liquid level.
Liquid level meter comprises reflex level gauge or perspective formula liquid level meter etc., their utilize the fluid column of the liquid level meter be connected with water tank to show the liquid level of the water tank of boiler etc., the perspective window (liquid level viewing window) that sees through on the front that is arranged on liquid level meter is watched fluid column, observes liquid level thus.
The glass that embeds the character with anti-liquid level meter working conditions in the hole of above-mentioned perspective window on being formed at the liquid level meter main body constitutes, for example, see through the perspective window and watch, can monitor the liquid level of boiler under the condition such as High Temperature High Pressure etc. safely along the liquid level that moves up and down in the liquid level meter.
Liquid level meter as mentioned above has the liquid level meter of record in the patent documentation 1 for example.
The liquid level meter of being put down in writing in the patent documentation 1 by the liquid level meter main body, form the liquid level meter glass of perspective window and liquid level meter glass be fixed liquid level meter shell on the liquid level meter main body and gasket seal etc. and constitute.
According to conditions such as the pressure of boiler that liquid level meter connected etc. and temperature, differences such as the material of the component parts of liquid level meter, structure, and the liquid level meter glass of window is had an X-rayed in different being used to such as used thickness and composition.
In addition, under the situation of the liquid level meter of boiler that is used for High Temperature High Pressure etc.,, and on liquid level meter glass and saturated surface that liquid contacts, mica is installed for the corrosion of the boiler water storage that prevents pyritous water and steam and high pH value (10～11) to liquid level meter glass.
Further; when the liquid in the water tank is alkalescence; on the saturated surface of liquid level meter glass, install with the same printing opacity of glass and have alkali-proof Teflon (registered trademark) plate; or at protective membranes such as direct coating Teflons on glass and form guard block, so that liquid level meter glass does not contact with alkaline liquid.
As having alkali resistance, stable on heating guard block, in patent documentation 1, record by materials such as fluoro-resin are carried out the parts that forming process forms.
As mentioned above; under the situation of the liquid level meter that sees through perspective window supervision fluid column; liquid level meter glass by conditions such as use high temperature high voltage resistants; and for the corrosion that prevents liquid level meter glass mica is installed or is had alkali resistance corrosion protection plate or at coating protective membrane on glass, and guarantee the weather resistance of the perspective window part of liquid level meter.
[patent documentation 1] Japanese kokai publication hei 7-19929 communique
Summary of the invention
But, when as mentioned above, when the corrosion protection plate of the installed inside alkali resistance excellence of liquid level meter glass etc., the pad that existence need be protected these parts, and make assembling become complicated, increase problems such as cost because of using guard blocks such as corrosion protection plate.
In addition,, aforesaid corrosion protection plate is installed in addition, when long-time the use, can not be prevented the corrosion of corrosion protection plate fully, need to regularly replace the corrosion protection plate that is installed on the liquid level meter even use liquid level meter glass.
In order to change the corrosion protection plate, need the dismounting liquid level meter, therefore in the perspective window, liquid level meter glass is installed other guard block such as corrosion protection plate in addition, at this moment, need accurate field engineering in order to prevent leak of liquid, make on the contrary and change operation and become loaded down with trivial details.
Therefore; the liquid level meter glass that needs a kind of liquid level meter to use; when not using Teflon plate or mica etc. to have alkali-proof guard block, even independent liquid level meter glass also can make the good and excellent in te pins of durability of chemical stability such as alkali resistance with the split of liquid level meter glass.
Thereby the object of the invention is to provide a kind of liquid level of liquid level meter to observe glazing, even long-time use also can make the corrosion of liquid level meter glass few, and the alkali resistance excellence.
In order to solve above-mentioned problem, the liquid level of liquid level meter of the present invention is observed in the glazing, described liquid level meter utilizes fluid column to represent liquid level, and observe described liquid level by watching described fluid column through the liquid level viewing window, the liquid level of described liquid level meter is observed glazing and is characterised in that, contains: the SiO of 20～30wt%
2, 15～20wt% Al
2O
3, 25～30wt% Y
2O
3, 15～20wt% La
2O
3, 4～10wt% TiO
2, 5～10wt% ZrO
2
According to the present invention, can access the liquid level meter glass of alkali resistance excellence, excellent in te pins of durability.
Especially, under the situation of the liquid level meter of observing liquid level, need correctly observe liquid level, thereby, then identifiability be brought influence if liquid level is observed the surface corrosion of glazing through the liquid level viewing window.
But according to the present invention, even when using under the environment of high-temperature high pressure water or in alkaline liquid, the saturated surface that can suppress liquid level observation glazing corrodes, and the life-time service identifiability can not descend yet.
In addition; observe glazing according to liquid level of the present invention; guard blocks such as having alkali-proof corrosion protection plate need be set in addition in liquid level meter, thereby compare cost with the situation that guard block must be set low, can alleviate the burden of liquid level meter being carried out upkeep operation.
Description of drawings
Fig. 1 makes the sectional view of the liquid level meter of embodiment of the present invention.
Nomenclature
1 liquid level meter, 2 liquid level meter main body 4a, 4b have an X-rayed window
6a, 6b liquid level meter shell 10 liner pads 12 gasket seals
G liquid level meter glass
Embodiment
Below, the liquid level meter glass G that observes glazing as the liquid level of liquid level meter is described.
The structure of the liquid level meter 1 of the liquid level meter glass G that has utilized present embodiment at first, is described according to Fig. 1.
Fig. 1 is the cross-sectional view of liquid level meter 1.
The bindings such as water tank of liquid level meter 1 and for example boiler can utilize the liquid level of observing water tank inside along the liquid level of the fluid column that moves up and down in the liquid level meter.
And, the liquid level meter 1 of present embodiment makes the Clairvoyant type liquid level meter, on its front and the back side, be formed with perspective window 4a, 4b, utilize the light that penetrates into the front from this perspective window 4a, 4b from the back side of liquid level meter 1, can watch the fluid column in the liquid level meter 1 through a plurality of circles of light.
Liquid level meter 1 is made of liquid level meter shell 6a, 6b, gasket seal 12 and the liner pad 10 etc. at liquid level meter main body 2, liquid level meter glass G, front and the back side, and wherein, liquid level meter main body 2 and the boiler that will measure liquid level etc. are connected, and the liquid of boiler internal flows into wherein; Liquid level meter glass G is installed on the front and the back side of liquid level meter main body 2; Liquid level meter shell 6a, 6b are fixed in liquid level meter main body 2 with liquid level meter glass G; Gasket seal 12 is configured between liquid level meter main body 2 and the liquid level meter glass G, prevents leak of liquid; Liner pad 10 is configured between liquid level meter shell 6a, 6b and the liquid level meter glass G, prevents from liquid level meter glass G is caused damage.
Below, the assembling procedure of liquid level meter 1 is described.
At first, on the front and the back side of liquid level meter main body 2, be formed with the front that connects liquid level meter main body 2, the communicating pores at the back side, be formed with a pile embedded groove 20 that can embed liquid level meter glass G at this at the part place that will have an X-rayed fluid column.
Across gasket seal 12 liquid level meter glass G is embedded in this embedded groove 20.
Then, liner pad 10 is clipped between liquid level meter glass G and liquid level meter shell 6a, the 6b, under this state, liquid level meter shell 6a, 6b is fixed in liquid level meter main body 2.
Owing to need fixedly embedded liquid level meter glass G,, so utilize fixing part 8a, 8b such as screw securely liquid level meter shell 6a, 6b to be fixed so that liquid that can not leaks from hermetic unit between liquid level meter main body 2 and the liquid level meter glass G.
On liquid level meter shell 6a, the 6b of the liquid level meter of assembling as mentioned above 1, be formed with circular port 60a, 60b in order to form perspective window 4a, 4b, can see through the liquid level meter glass G that is fixed between this circular port 60a, 60b and the liquid level meter main body 2 and observe fluid column.
In constituting liquid level meter 1 as mentioned above, light penetrates into the front from the back side of liquid level meter 1, can see through the perspective window and observe fluid column.
And, in the liquid level meter 1 of present embodiment, to perspective window 4a, the 4b that observes liquid level is circular window, and liquid level meter glass G is illustrated for circular situation, but, be not limited thereto, can be applicable to also that certainly making liquid level meter glass G is elongate windows, and the situation that penetrating window can be observed continuously along liquid level change.
At the perspective window is under the situation of elongate windows, can make the form fit of liquid level meter glass G and elongate windows form elongated shape.
Then, liquid level meter glass G employed, present embodiment in perspective window 4a, the 4b of the liquid level meter 1 of above explanation is elaborated.
Because the liquid level meter glass G alkali resistance excellence of present embodiment therefore need be at the face that contacts with fluid column of liquid level meter glass G, promptly saturated surface G1 goes up guard blocks such as the corrosion protection plate is installed.
The following describes this liquid level meter glass G.
The liquid level meter glass G of present embodiment contains the SiO of 20～30wt%
2, 15～20wt% Al
2O
3, 25～30wt% Y
2O
3, 15～20wt% La
2O
3, 4～10wt% TiO
2, 5～10wt% ZrO
2
SiO
2As network former is the necessary composition of vitrifying.
Content is preferably 20～30wt%.Then be difficult to vitrifying if be less than 20wt%; Unnecessary 30wt% then alkali resistance descends.
Al
2O
3Be to reduce the necessary composition of glass melting temperature.
Content is preferably 15～20wt%.
Al
2O
3Content when being less than 15wt%, happy and harmonious temperature uprises; During unnecessary 20wt%, alkali resistance descends.
Y
2O
3Be to improve the necessary composition of alkali resistance.
Content is preferably 25～30wt%.
Be less than then alkali resistance decline of 25wt%; Unnecessary 30wt% then is difficult to vitrifying, and devitrification takes place easily.
La
2O
3With Y
2O
3Equally, be to improve the necessary composition of alkali resistance.
Content is preferably 15～20wt%.
Be less than then alkali resistance decline of 15wt%; Unnecessary 20wt% then is difficult to vitrifying, and devitrification takes place easily.
Further, the liquid level meter glass G of present embodiment is by making Y
2O
3And La
2O
3Content be above-mentioned scope, make that on the saturated surface G1 of liquid level meter glass G and alkaline solution even because of white opacity temporarily takes place alkaline solution, light transmission descends, and also can peel off the thin film layer of this white opacity, reproduces the glass surface with light transmission.
Thus,, also can keep light transmission for a long time, obtain being suitable for the liquid level meter glass of the level gauging of alkaline solution even when liquid level meter glass G contacts with basic solution.
TiO
2Be to reduce the necessary composition of thermal expansivity.
Content is preferably 4～10wt%.
Be less than the effect that 4wt% then can not get reducing thermal expansivity, unnecessary 10wt% then alkali resistance descends.
ZrO
2Be to improve the necessary composition of alkali resistance.
Content is preferably 5～10wt%.
If being less than 5wt% then can not get alkali-proof effect, if unnecessary 10wt% is then because of ZrO
2Fusing point (2715 ℃) is high and be difficult to vitrifying.
The liquid level meter glass G of present embodiment satisfies above condition, still, so long as satisfy this condition, can suitably contain common employed composition (B when making glass such as physics and chemistry usefulness
2O
3Deng).
Further preferred liquid level meter glass of the present invention meets the following conditions.
At first, preferred mechanical intensity is stipulated (mechanical properties) according to JIS B8286 (2005) pressurized vessel with bezel, and flexural strength is 200N/mm
2More than.
If less than 200N/mm
2Then have problems at secure context with liquid level meter glass as high pressure.
In addition, the liquid level meter glass G thermal expansivity of preferred present embodiment is 40 * 10
-7～60 * 10
-7/ ℃.
If less than 40 * 10
-7If/℃ the problem that then exists flexural strength to descend is greater than 60 * 10
-7/ ℃ then exist to be difficult to carry out tempering and to handle (air-cooled intensive treatment), the problem that resistance to sudden heating descends.
In addition, the liquid level meter glass G of preferred present embodiment to estimate the reduction rate that the chemical-resistant powder method is measured, is below the 0.5wt% for basic solution.
If reduction rate surpasses then alkali resistance deficiency of 0.5wt%.
As the test of expression chemical-resistant, the chemical resistant properties measuring method (powder method) based on the opticglass of Japanese opticglass industry meeting standard (JOGIS06-1999) is for example arranged.
This chemical-resistant measuring method is, when measuring water tolerance, with sample (the volume 1cm of proportion weight part
3) glass powder (particle size 425～600 μ m) be immersed in the water more than 99 ℃ 60 minutes, when measuring acid resistance, this sample is immersed in the nitric acid of 0.01N 60 minutes, measure the weight reduction behind the dipping respectively.
The alkali-proof above-mentioned reduction rate of the liquid level meter glass G of expression present embodiment is to abide by the chemical-resistant measuring method of Japanese opticglass industry meeting standard, the value of measuring behind the powdered sample effect alkaline solution to liquid level meter glass G.
Be specially, liquid level meter glass G be immersed among the NaOH aqueous solution 500ml of 2 regulations (N), dipping is 48 hours under 95 ℃ ± 1 ℃ condition, measures the reduction of the quality of historical data then, tries to achieve alkali-proof reduction rate thus.
And the quality change of sample is measured and is accurate to 0.1mg.
For the liquid level meter glass G of present embodiment, the reduction rate that utilizes above-mentioned test determination can fully satisfy desired alkali resistance when being used for liquid level meter for below the 0.5wt%.
In addition, the liquid level meter glass G of preferred present embodiment, even under the situation of effect basic solution, optical properties such as perviousness descend seldom, so as can be correct watch liquid level.
Carrying out following test in the evaluation that optical property is kept, is dipping 120 days among 30%, 20 ℃ the NaOH aqueous solution 2000ml with liquid level meter glass G at mass percent concentration, observes the identifiability before and after its dipping.
To the liquid level meter glass G of present embodiment, act on alkaline solution in the above conditions after, identifiability does not descend, can be as the liquid level meter glass life-time service of liquid level meter.
As mentioned above, the liquid level meter glass alkali resistance excellence of present embodiment, and desired light transmission when can long term maintenance being used for the perspective glazing of liquid level meter.
Therefore, be applicable to the perspective glazing of the liquid level meter that the liquid level of alkaline solution is measured.
And, in the present embodiment, at the front of liquid level meter main body 2 and the back side perspective window is set and makes light transmission seeing through, thereby the perspective formula liquid level meter that can observe liquid level is illustrated with liquid level meter glass G, but, the present invention is not limited thereto, can use liquid level meter glass G in reflex level gauge too.
In reflex level gauge, saturated surface side at liquid level meter glass is formed with a plurality of pods, when light incides the perspective window, partly locates light at gas and is presented silvery white by the reflection of the pod of glass, continue to incide at liquid portion place light and present black in the liquid, can utilize this phenomenon to observe liquid level.
Therefore, by on the liquid level meter glass G of present embodiment, cutting out a plurality of pods, can be used in the liquid level meter glass that reflection makes liquid level meter equally.
Thereby, the liquid level meter glass G of present embodiment can be easy to maintenance, used in the reflex level gauge cheaply.
[embodiment]
Below, the embodiment of liquid level meter glass of the liquid level meter of present embodiment is described.
Table 1 illustrates the composition and the solid state properties value of each embodiment and the comparative example of actual fabrication.
In addition, to these embodiment and comparative example, carry out the test that alkali resistance is estimated, and obtain reduction rate.
Utilize Archimedes's method to obtain proportion.
Abide by Japanese opticglass industry and can try to achieve reduction rate (alkali resistance evaluation) by standard (JOGIS) 06-1999.
That is, the identical gram number with proportion of sample weighing of particle size 420 μ m～590 μ m is put in the platinum net (platinum カ go), in the NaOH of 2N aqueous solution 500ml, flooded 48 hours down, utilize the weight of dipping front and back to try to achieve reduction rate at 95 ℃.
[table 1]
Either party is representing on the characteristics such as alkali-proof reduction rate, physical strength, thermal expansivity among the embodiment 1～3, can both fine perspective glazing as liquid level meter.
On the other hand, in the comparative example 3～7,, therefore, can not solve alkali-proof problem because the alkali-proof reduction rate of expression is more than the 1.30wt%, to substantially exceed 0.5wt%.
In addition, in the comparative example 2, because thermal expansivity surpasses 60 * 10
-7/ ℃, therefore being difficult to carry out tempering and handling (air-cooled intensive treatment), shock-resistance descends, so not preferred.
Below, illustrate the endurance test of the embodiment 1～3 in the foregoing description and the comparative example and comparative example 1,2,5 liquid level meter that carry out, relevant with the light transmission of glass.
In test, utilize employed circular liquid level meter glass in the liquid level meter, do following 3 kinds of tests: be immersed in the test carried out in the alkaline aqueous solution (test 1), the test under the high-temperature and high-pressure conditions that autoclave pressure produces (test 2) and be used for the liquid level meter of boiler and the real dress test (testing 3) carried out.
(1) test 1
With the liquid level meter glass of sample in the NaOH of mass percent concentration 30% aqueous solution at normal temperature (10 ℃～20 ℃) dipping 120 days down, come with visual that the light transmission of glass changes before and after the viewing test.
(2) test 2
The liquid level meter glass-impregnated of sample is dropped into autoclave pressure in distilled water,, placed under the condition that temperature is 330～360 ℃ 56 days, come with visual that the light transmission of glass changes before and after the observation experiment at pressure 15～20Mpa.
(3) test 3
(i) the liquid level meter glass with sample is installed on the liquid level meter, the boiler that adds entry was worked 15 days down for 330 ℃ in pressure 14MPa (ultra-high voltage), temperature, and liquid level meter glass is imposed effect.
After using on the boiler, take off liquid level meter glass, come the light transmission of observation experiment front and back glass to change with visual observation.
(ii) the liquid level meter glass with sample is installed on the liquid level meter, the boiler that adds feedwater (the pH value is 10～11) was worked 10 months down for 260 ℃ in pressure 5MPa (middle pressure), temperature, and liquid level meter glass is imposed effect.
After using on the boiler, take off liquid level meter glass, come the light transmission of observation experiment front and back glass to change with visual observation.
Above test-results is presented in the table 2.
[table 2]
The test-results of test 1～3 is described.
At first 1 result is tested in explanation.
Comparative example 1 is not corrosion almost, keeps initial light transmission.Consider that its reason is, owing to yttrium oxide (Y as alkali-proof effective constituent
2O
3) ratio (45%) brought up to vitrified reaching the standard grade, thereby improved alkali resistance.
In addition, comparative example 2 bleaches slightly, but keeps light transmission.
White opacity takes place in comparative example 5, can not have an X-rayed.And then, the upper layer corrosion spalling of glass, the white corrosion thing is layered in around it.
On the other hand, embodiment 2 compares with comparative example 1, and the surface bleaches slightly, but is that perviousness is the most excellent in other embodiment beyond the comparative example 1 and the comparative example, has kept light transmission fully as the liquid level meter glass of liquid level meter.
Embodiment 1 and embodiment 3 have also kept light transmission fully.
The following describes the result of test 2.
Also can see same phenomenon in test 1,3, white film is peeled off and is reproduced the glass surface with light transmission, can have an X-rayed, but wherein the light transmission of embodiment 2 is the most excellent.
Comparative example 1, light transmission is good in the early stage, but has not had light transmission afterwards.
The phenomenon of light transmission does not take place to recover as the film separation of embodiment 2, can not have an X-rayed liquid level.
Comparative example 2 and comparative example 5, similarly to Example 2, the initial stage in test generates white film on the saturated surface of liquid level meter glass, and film separation is reproduced glass surface afterwards.
But, different with embodiment 2, carry out repeatedly after film separation and glass surface reproduce, glass surface becomes the frosted shape, does not have a light transmission, can not have an X-rayed liquid level.
The result of test 3 (i) then, is described.
But, under drying regime, can be easily with the white precipitate of liquid level meter glass surface from glass surface glass, reproduce glass surface.
In other embodiment 1,3, also can see roughly the same phenomenon, but the light transmission of embodiment 2 is the most excellent.
Comparative example 1, the 14th day front and back after on-test, the saturated surface generation white opacity of liquid level meter glass.
The white precipitate of glass surface is bonded to glass surface, can not peel off easily.
Comparative example 2 and comparative example 5 after on-test about the 7th day, at the saturated surface generation white opacity of liquid level meter glass in early stage, can not be had an X-rayed liquid level.
And be difficult to make white precipitate to be peeled off.
The following describes test 3 result (ii).
Compare corrosion with other comparative example few.
Therefore, embodiment 2 can be when boiler pressure be mesolow life-time service.
In other embodiment 1,3, also can see roughly the same phenomenon.
But embodiment 2 is the most excellent.
Comparative example 1 does not soak into the phenomenon of peeling off on surface, and is faster than embodiment 2 white opacities progress.
Comparative example 2 and comparative example 5 corrosion make progress sooner.
And comparative example 1,2,5 all can not be kept light transmission.
Measurement result shown in the above-mentioned table 2 is comprehensively judged, based on embodiments of the invention alkali resistance excellence, after the effect that is subjected to pyritous feedwater or steam, alkaline solution, the thin layer that white opacity takes place is peeled off naturally, reproduce glass surface, thereby can in life-time service, guarantee light transmission.
Therefore,,, also can reduce the frequency of maintenance, significantly reduce the expense of safeguarding even under the situation that liquid level monitors or alkaline solution measures of boiler according to having the liquid level meter of liquid level meter glass as mentioned above.
Claims (6)
1. the liquid level of a liquid level meter is observed glazing, and wherein, described liquid level meter utilizes fluid column to represent liquid level, and watches described fluid column by the liquid level viewing window and observe described liquid level, and the liquid level of described liquid level meter is observed glazing and is characterised in that, contains:
The SiO of 20～30wt%
2, 15～20wt% Al
2O
3, 25～30wt% Y
2O
3, 15～20wt% La
2O
3, 4～10wt% TiO
2, 5～10wt% ZrO
2
2. the liquid level of liquid level meter as claimed in claim 1 is observed glazing, it is characterized in that:
Flexural strength is 200N/mm
2More than.
3. the liquid level of liquid level meter as claimed in claim 1 is observed glazing, it is characterized in that:
Thermal expansivity is 40 * 10
-7～60 * 10
-7℃.
4. the liquid level of liquid level meter as claimed in claim 1 is observed glazing, it is characterized in that:
Utilize reduction rate that alkali-proof measuring method measures for below the 0.5wt%, wherein said alkali-proof measuring method is the powder method of the chemical-resistant measuring method of abideing by opticglass that can standard JOGIS06-1999 based on Japanese opticglass industry.
5. the liquid level of liquid level meter as claimed in claim 1 is observed glazing, it is characterized in that:
Peel off by the thin film layer that will contact the white opacity that generates, and keep transparency with basic solution.
6. a liquid level meter is characterized in that, the liquid level with liquid level meter as claimed in claim 1 is observed glazing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-279429 | 2009-12-09 | ||
| JP2009279429A JP4527193B1 (en) | 2009-12-09 | 2009-12-09 | Glass for liquid level observation window of level gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102092938A true CN102092938A (en) | 2011-06-15 |
| CN102092938B CN102092938B (en) | 2013-06-19 |
Family
ID=42767865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010297808 Active CN102092938B (en) | 2009-12-09 | 2010-09-30 | Glass used for liquid level observation window of level gauge and level gauge |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4527193B1 (en) |
| CN (1) | CN102092938B (en) |
| HK (1) | HK1162454A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106810067A (en) * | 2016-09-23 | 2017-06-09 | 南京神童特种玻璃技术有限公司 | A kind of alkaline-resisting high temperature resistant overpressure resistant zirconium yttrium lanthanum zinc-aluminium silica glass |
| CN110156327A (en) * | 2019-06-28 | 2019-08-23 | 鲁米星特种玻璃科技股份有限公司 | A kind of high zirconium alkali-proof glass and its application |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4527193B1 (en) * | 2009-12-09 | 2010-08-18 | 文化貿易工業株式会社 | Glass for liquid level observation window of level gauge |
| WO2017175552A1 (en) * | 2016-04-04 | 2017-10-12 | 株式会社 オハラ | Optical glass, preform material and optical element |
| TWI752046B (en) * | 2016-06-29 | 2022-01-11 | 日商小原股份有限公司 | Optical Glass, Preforms and Optical Components |
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|---|---|---|---|---|
| JPS56129632A (en) * | 1980-03-12 | 1981-10-09 | Natl Inst For Res In Inorg Mater | Alkali-proof alminosilicate glass |
| JPH0719929A (en) * | 1993-06-29 | 1995-01-20 | Miura Co Ltd | Level gauge for boiler |
| WO2006057405A1 (en) * | 2004-11-29 | 2006-06-01 | Nippon Sheet Glass Company, Limited | Rubber-reinforcing cord and rubber belt using same |
| WO2006106781A1 (en) * | 2005-03-31 | 2006-10-12 | Nippon Sheet Glass Company, Limited | Glass composition containing yttrium and glass spacer for electron beam excitation type display |
| JP4527193B1 (en) * | 2009-12-09 | 2010-08-18 | 文化貿易工業株式会社 | Glass for liquid level observation window of level gauge |
-
2009
- 2009-12-09 JP JP2009279429A patent/JP4527193B1/en active Active
-
2010
- 2010-09-30 CN CN 201010297808 patent/CN102092938B/en active Active
-
2011
- 2011-12-01 HK HK11113035.7A patent/HK1162454A1/en not_active IP Right Cessation
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56129632A (en) * | 1980-03-12 | 1981-10-09 | Natl Inst For Res In Inorg Mater | Alkali-proof alminosilicate glass |
| JPH0719929A (en) * | 1993-06-29 | 1995-01-20 | Miura Co Ltd | Level gauge for boiler |
| WO2006057405A1 (en) * | 2004-11-29 | 2006-06-01 | Nippon Sheet Glass Company, Limited | Rubber-reinforcing cord and rubber belt using same |
| WO2006106781A1 (en) * | 2005-03-31 | 2006-10-12 | Nippon Sheet Glass Company, Limited | Glass composition containing yttrium and glass spacer for electron beam excitation type display |
| JP4527193B1 (en) * | 2009-12-09 | 2010-08-18 | 文化貿易工業株式会社 | Glass for liquid level observation window of level gauge |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106810067A (en) * | 2016-09-23 | 2017-06-09 | 南京神童特种玻璃技术有限公司 | A kind of alkaline-resisting high temperature resistant overpressure resistant zirconium yttrium lanthanum zinc-aluminium silica glass |
| CN110156327A (en) * | 2019-06-28 | 2019-08-23 | 鲁米星特种玻璃科技股份有限公司 | A kind of high zirconium alkali-proof glass and its application |
| CN110156327B (en) * | 2019-06-28 | 2022-05-17 | 鲁米星特种玻璃科技股份有限公司 | High-zirconium alkali-resistant glass and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4527193B1 (en) | 2010-08-18 |
| JP2011122881A (en) | 2011-06-23 |
| CN102092938B (en) | 2013-06-19 |
| HK1162454A1 (en) | 2012-08-31 |
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