CN117685850A - Residual thickness measuring device, residual thickness measuring method, and glass manufacturing method - Google Patents
Residual thickness measuring device, residual thickness measuring method, and glass manufacturing method Download PDFInfo
- Publication number
- CN117685850A CN117685850A CN202311109640.1A CN202311109640A CN117685850A CN 117685850 A CN117685850 A CN 117685850A CN 202311109640 A CN202311109640 A CN 202311109640A CN 117685850 A CN117685850 A CN 117685850A
- Authority
- CN
- China
- Prior art keywords
- scale
- residual thickness
- measuring device
- thickness measuring
- cover
- Prior art date
- 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.)
- Pending
Links
- 239000011521 glass Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000006060 molten glass Substances 0.000 claims abstract description 42
- 238000002844 melting Methods 0.000 claims abstract description 25
- 230000008018 melting Effects 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 10
- 238000005485 electric heating Methods 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000011449 brick Substances 0.000 description 15
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Glass Melting And Manufacturing (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention relates to a residual thickness measuring device, a residual thickness measuring method and a glass manufacturing method, and provides a technology for measuring the residual thickness of the wall of a melting tank without stopping the electric heating of molten glass. The residual thickness measuring device measures the residual thickness of the wall of the melting tank for storing the electrically heated molten glass. The residual thickness measuring device is provided with: a metal scale inserted into the through hole of the wall; and an insulating cover covering at least a part of the outer peripheral surface of the scale on the outer side of the wall.
Description
Technical Field
The invention relates to a residual thickness measuring device, a residual thickness measuring method and a glass manufacturing method.
Background
The melting tank stores molten glass obtained by melting a glass raw material. The walls of the melting tank are in contact with the molten glass and gradually erode over time. Thus, the thickness of the wall gradually decreases. If the wall thickness is less than the threshold value, repair for extending the life is performed or the operation of the melting tank is stopped as the life is exhausted.
Patent document 1 describes that a metal scale is inserted into a joint between bricks constituting a side wall of a melting tank to measure the residual thickness of the side wall of the melting tank (see paragraph [0006] of patent document 1).
Patent documents 2, 3 and 4 disclose techniques for electrically heating molten glass. The molten glass is electrically heated by a plurality of electrode rods in the melting tank. Joule heat is generated by applying a voltage to the molten glass to cause a current to flow through the molten glass.
Prior art literature
Patent literature
Patent document 1: japanese patent application laid-open No. 2012-13512
Patent document 2: japanese patent laid-open publication No. 2018-193268
Patent document 3: japanese patent publication No. 61-21170
Patent document 4: japanese patent laid-open No. 4-342425
Disclosure of Invention
Problems to be solved by the invention
When the remaining thickness of the wall of the melting tank for electric heating is measured using a metal scale, electric shock of an operator is prevented from occurring during the remaining thickness measurement, and electric heating of the molten glass is temporarily stopped.
When the electric heating of the molten glass is temporarily stopped, the temperature of the molten glass may vary, and the quality of the product glass may vary. In particular, if the erosion of the wall progresses, the residual thickness becomes smaller, and the measurement frequency of the residual thickness increases, so that the risk of temporarily stopping the energization heating increases.
One embodiment of the present disclosure provides a technique for measuring the residual thickness of the wall of a melting tank without stopping the electric heating of molten glass.
Means for solving the problems
A residual thickness measuring device according to one embodiment of the present disclosure measures a residual thickness of a wall of a melting tank storing molten glass heated by energization. The residual thickness measuring device is provided with: a metal scale inserted into the through hole of the wall; and an insulating cover covering at least a part of the outer peripheral surface of the scale on the outer side of the wall.
Effects of the invention
According to one aspect of the present disclosure, at least a part of the outer peripheral surface of the scale is covered with the insulating cover, so that an electric shock to the operator can be suppressed, and the remaining thickness of the wall of the melting tank can be measured without stopping the electric heating of the molten glass.
Drawings
Fig. 1 is a cross-sectional view showing a residual thickness measuring device according to one embodiment, (a) is a cross-sectional view showing a state in which a scale is inserted into a through hole in a side wall, (B) is a cross-sectional view showing a state in which a cover is brought into contact with a side wall, and (C) is a cross-sectional view showing a state in which a scale is pulled out from a through hole in a side wall.
Fig. 2 is a cross-sectional view showing the residual thickness measuring device and the dissolution tank according to the modification, (a) is a cross-sectional view showing a state before the scale is inserted into the through hole of the side wall, (B) is a cross-sectional view showing a state in which the scale is inserted into the through hole of the side wall, and (C) is a cross-sectional view showing a state in which the scale is pulled out from the through hole of the side wall.
Detailed Description
Embodiments of the present disclosure will be described below with reference to the drawings. In the drawings, the same or corresponding structures are denoted by the same reference numerals, and description thereof is omitted. In the specification, "to" representing the numerical range means that the numerical values described before and after are included as the lower limit value and the upper limit value.
Referring to fig. 1, a residual thickness measuring device 100 according to an embodiment will be described. The residual thickness measuring device 100 measures the residual thickness of the wall of the dissolution tank 10. The melting tank 10 stores molten glass G obtained by melting glass raw materials. The walls of the melting tank 10 are in contact with the molten glass G and gradually erode over time. Thus, the thickness of the wall of the melting tank 10 gradually decreases. If the wall thickness of the melting tank 10 is smaller than the threshold value, repair for extending the life is performed, or the operation of the melting tank 10 is stopped as the life is exhausted.
The melting tank 10 has a side wall 11 surrounding the molten glass G from the side and a bottom wall 12 supporting the molten glass G from below. The side wall 11 and the bottom wall 12 are also simply referred to as walls. The walls of the dissolution tank 10 are made up of a plurality of bricks. The bricks are arranged with a gap therebetween so as not to contact each other due to thermal expansion. The gap is set to a value such that the molten glass G does not leak, for example, 0.1mm to 5mm. The gaps between adjacent bricks can be used as the through holes 13 for measuring the residual thickness. Since a plurality of gaps exist between adjacent bricks, the residual thickness can be measured at a plurality of positions.
The residual thickness measuring device 100 is used for measuring the residual thickness of the side wall 11, for example. The residual thickness measuring device 100 may be used for measuring the residual thickness of the bottom wall 12. The residual thickness measuring device 100 includes a scale 110. As shown in fig. 1 (a), the scale 110 is inserted into the through hole 13 of the side wall 11 and contacts the molten glass G. The molten glass G is deprived of heat by the wall of the melting tank 10, and thus hardens to some extent near the wall, preventing the penetration of the scale 110.
The scale 110 is, for example, plate-shaped. The thickness of the plate-like scale 110 is set to a value such that the scale 110 can be inserted into the gap between adjacent bricks, for example, 0.1mm to 3mm. The scale 110 may be rod-shaped. The diameter of the rod-shaped scale 110 is, for example, 0.1mm to 3mm.
The scale 110 has a distal end surface 111 that contacts the molten glass G, a base end surface 112 that faces the distal end surface 111, and an outer peripheral surface 113. The scale 110 has a scale 114 indicating a distance from the front end surface 111. The scale 114 may also represent a distance from the base end surface 112. In short, as shown in fig. 1 (a) to 1 (C), the remaining thickness of the side wall 11 can be measured using the scale 114, which will be described in detail later.
The scale 110 rubs against the bricks constituting the side wall 11 when inserted into the through hole 13 of the side wall 11 or pulled out from the through hole 13. If the scale 110 is made of metal, the scale 110 is not easily broken, and the operation is easy. Therefore, in the present embodiment, the scale 110 made of metal is used.
The molten glass G is electrically heated by a plurality of electrodes, not shown, in the melting tank 10. A current is caused to flow through the molten glass G by applying a voltage to the molten glass G, thereby generating joule heat. The electrodes are, for example, rod-shaped. A rod-shaped electrode is inserted into the molten glass G from the bottom wall 12 of the melting tank 10. The rod-shaped electrode may be inserted from above or from the side with respect to the molten glass G.
When the plurality of electrodes energize and heat the molten glass G in a state where the front end surface 111 of the scale 110 is in contact with the molten glass G, an electric current flows to the metal scale 110 through the molten glass G. In addition, as a heater for heating the molten glass G, a plurality of electrodes and a gas burner may be used in combination. In this case, too, an electric current flows to the metal scale 110 via the molten glass G.
Accordingly, the residual thickness measuring device 100 includes an insulating cover 120 covering at least a part of the outer peripheral surface 113 of the scale 110 on the outer side of the side wall 11. The worker holds the scale 110 via the cover 120. Therefore, an electric shock to the operator can be suppressed, and the residual thickness of the side wall 11 can be measured without stopping the electric heating of the molten glass G. The temperature fluctuation of the molten glass G can be suppressed at the time of the residual thickness measurement, and the quality fluctuation of the product glass can be suppressed. The insulation resistance of the cover 120 is preferably 0.4mΩ or more, more preferably 100mΩ or more, and still more preferably 1gΩ or more. The insulation resistance of the cover 120 is preferably larger, but not particularly limited, and is preferably 100tΩ or less from the viewpoint of realization.
The cover 120 may be provided outside the side wall 11, and may not be inserted into the through hole 13 of the side wall 11, unlike the scale 110. This is because the worker performs work on the outside of the side wall 11. Further, by not inserting the cover 120 into the through hole 13 of the side wall 11, the cover 120 can be prevented from being broken inside the through hole 13, and fragments of the cover 120 can be prevented from remaining in the through hole 13.
The cover 120 has a covering portion 121 that covers at least a part of the outer peripheral surface 113 of the scale 110. In a cross section perpendicular to the longitudinal direction (left-right direction in fig. 1) of the scale 110, the entire outer peripheral surface 113 of the scale 110 is preferably covered with the covering portion 121. In the present embodiment, the cover 120 is slidable in the longitudinal direction of the scale 110, but may not be slidable.
In the case where the scale 110 is plate-shaped, the cover portion 121 includes, for example, a pair of insulating plates 121a and 121b. The pair of insulating plates 121a and 121b are disposed with the plate-shaped scale 110 interposed therebetween. The pair of insulating plates 121a and 121b are obtained by, for example, machining bricks. The width of the pair of insulating plates 121a, 121b is preferably larger than the width of the scale 110. Contact of the scale 110 with the operator can be restricted.
The cover 121 may include an insulating tape, not shown, in addition to the pair of insulating plates 121a and 121b. The insulating tape is wound around the pair of insulating plates 121a, 121b. Thus, in a cross section perpendicular to the longitudinal direction of the scale 110, the entire outer peripheral surface 113 of the scale 110 can be covered with the covering portion 121.
In addition, when the scale 110 is rod-shaped, the cover 121 includes, for example, a hollow insulating tube. The hollow insulating cylinder is obtained by, for example, machining bricks. A scale 110 is inserted into the hollow insulating cylinder. Thus, in a cross section perpendicular to the longitudinal direction of the scale 110, the entire outer peripheral surface 113 of the scale 110 can be covered with the covering portion 121.
The residual thickness measuring device 100 includes a regulating member 130 between the scale 110 and the cover 120 to regulate movement of heat from the scale 110 to the cover 120. The restriction member 130 has, for example, a lower thermal conductivity than both the scale 110 and the cover 120. This can suppress the temperature rise of the cover 120. In addition, in the case where the thermal conductivity of the cover 120 is sufficiently low, the restriction member 130 may be omitted.
In a cross section perpendicular to the longitudinal direction of the scale 110, the entire outer peripheral surface 113 of the scale 110 is preferably covered with the regulating member 130. The regulating member 130 is integrated with the cover 120, and is slidable in the longitudinal direction of the scale 110 together with the cover 120. In addition, the restricting member 130 may not be able to slide.
The restricting member 130 is obtained by, for example, processing a brick. The bricks constituting the restriction member 130 have a lower thermal conductivity than the bricks constituting the cap 120. On the other hand, the bricks constituting the cover 120 preferably have a higher resistivity than the bricks constituting the restriction member 130.
The regulating member 130 may be a spacer that forms an air layer, not shown, between the scale 110 and the cover 120. The thermal conductivity of the air layer is lower than that of the brick. Therefore, by forming an air layer, the movement of heat from the scale 110 to the cover 120 can be further restricted.
Next, an example of a method for measuring the residual thickness will be described with reference to fig. 1 again. For example, as shown in fig. 1 (a), the worker inserts the scale 110 into the through hole 13 of the side wall 11, and reads the position of the outer surface 15 of the side wall 11 by the scale 114 of the scale 110 in a state where the front end surface 111 of the scale 110 is in contact with the molten glass G. The remaining thickness T of the side wall 11 is equal to the distance L1 from the front end face 111 of the scale 110 to the outer surface 15 of the side wall 11.
As shown in fig. 1 (B), the worker may slide the cover 120 relative to the scale 110 in a state where the front end surface 111 of the scale 110 is in contact with the molten glass G, and may bring the cover 120 into contact with the side wall 11. In this case, the operator reads the distance L2 from the base end surface 112 of the scale 110 to the end surface 129 of the cover 120 on the opposite side of the side wall 11 to measure the remaining thickness T of the side wall 11. The length of the scale 110 and the length of the cover 120 are measured in advance, and are referred to when measuring the residual thickness T.
The worker may prohibit the cover 120 from sliding relative to the scale 110 in the state of fig. 1 (B), and then pull out the scale 110 from the through hole 13 of the side wall 11 as shown in fig. 1 (C). In this case, the operator reads the distance L1 from the front end surface 111 of the scale 110 to the end surface 128 of the cover 120 facing the side wall 11 to measure the remaining thickness T of the side wall 11.
Further, the operator may pull out the scale 110 from the through hole 13 of the side wall 11 as shown in fig. 1 (C), and then read the distance L2 from the base end surface 112 of the scale 110 to the end surface 129 of the cover 120 on the opposite side of the side wall 11 to measure the remaining thickness T of the side wall 11. The length of the scale 110 and the length of the cover 120 are measured in advance, and are referred to when measuring the residual thickness T.
Next, with reference to fig. 2, a residual thickness measuring device 100 according to a modification will be described. Hereinafter, the differences will be mainly described. The residual thickness measuring device 100 includes a scale 110 made of metal, an insulating cover 120, and a restricting member 130. The cover 120 has a covering portion 121 that covers at least a part of the outer peripheral surface 113 of the scale 110 and an opposing portion 122 that opposes the base end surface 112 of the scale 110.
The cover portion 121 and the opposing portion 122 are integrated. This can further suppress an electric shock to the operator. In addition, in the case where the cover portion 121 and the opposing portion 122 are integrated, the cover 120 may not be slidable in the longitudinal direction of the scale 110. The cover 120 may have a cover 123 opposite the side wall 11. The cover 123, the cover 121, and the opposite portion 122 may also be integrated.
The residual thickness measuring device 100 includes a cursor 140 that contacts the side wall 11 from the outside and slides relative to the scale 110. The cursor 140 is capable of sliding in the length direction of the scale 110, indicating the current position of the cursor 140 relative to the scale 110. In a state where the front end surface 111 of the scale 110 is in contact with the molten glass G and the cursor 140 is in contact with the outer surface 15 of the side wall 11, the cursor 140 represents the remaining thickness T of the side wall 11 on the scale 114. By providing the cursor 140, the remaining thickness T is easily read.
Next, an example of a method for measuring the residual thickness will be described with reference to fig. 2. For example, as shown in fig. 2 (a) to 2 (B), the worker inserts the scale 110 into the through hole 13 of the side wall 11 and brings the front end surface 111 of the scale 110 into contact with the molten glass G. Before the front end surface 111 of the scale 110 contacts the molten glass G, the cursor 140 contacts the outer surface 15 of the sidewall 11, and the cursor 140 slides relatively to the scale 110.
As shown in fig. 2 (B), the operator reads the distance L1 from the front end surface 111 of the scale 110 to the outer surface 15 of the side wall 11 to measure the remaining thickness T of the side wall 11. Cursor 140 is preferably transparent. However, even if the cursor 140 is opaque, the cursor 140 may have a window for reading the scale 114, for example, as long as the cursor 140 has a shape that the operator can read the scale 114.
The worker may prohibit the slide of the cursor 140 with respect to the scale 110 in the state of fig. 2 (B), and then pull out the scale 110 from the through hole 13 of the side wall 11 as shown in fig. 2 (C). In this case, as shown in fig. 2 (C), after the worker pulls out the scale 110 from the through hole 13 of the side wall 11, the worker reads the distance L1 from the front end surface 111 of the scale 110 to the cursor 114 to measure the remaining thickness T of the side wall 11.
The residual thickness measuring device, the residual thickness measuring method, and the glass manufacturing method according to the present disclosure have been described above, but the present disclosure is not limited to the above embodiments and the like. Various changes, modifications, substitutions, additions, deletions and combinations can be made within the scope described in the claims. These are of course also within the technical scope of the present disclosure.
Description of the reference numerals
10. A melting tank;
11. a sidewall;
12. a bottom wall;
13. a through hole;
100. a residual thickness measuring device;
110. a graduated scale;
113. an outer peripheral surface;
120. a cover.
Claims (7)
1. A residual thickness measuring device for measuring the residual thickness of a wall of a melting tank for storing a molten glass heated by electric current, wherein the residual thickness measuring device comprises:
a metal scale inserted into the through hole of the wall; and
An insulating cover covers at least a part of the outer peripheral surface of the scale on the outer side of the wall.
2. The residual thickness measuring device according to claim 1, wherein,
the graduated scale is plate-shaped or rod-shaped.
3. The residual thickness measuring device according to claim 1 or 2, wherein,
a restricting member is provided between the scale and the cover, and restricts movement of heat from the scale to the cover.
4. The residual thickness measuring device according to claim 1 or 2, wherein,
the residual thickness measuring device includes a cursor that is in contact with the wall from the outside and slides relative to the scale.
5. The residual thickness measuring device according to claim 1 or 2, wherein,
the scale has a front end surface which is in contact with the molten glass, a base end surface which faces the front end surface in an opposite direction, and the outer peripheral surface,
the cover has a covering portion that covers at least a part of the outer peripheral surface of the scale and an opposing portion that opposes the base end surface of the scale,
the cover portion and the opposing portion are integrated.
6. A method of residual thickness determination, comprising: the residual thickness is measured using the residual thickness measuring device according to claim 1 or 2.
7. A glass manufacturing method comprising measuring the residual thickness using the residual thickness measuring device according to claim 1 or 2, wherein,
the glass manufacturing method comprises the following steps: and carrying out electric heating on the molten glass.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022143735A JP2024039288A (en) | 2022-09-09 | 2022-09-09 | Residual thickness measuring apparatus, method for measuring residual thickness and method for manufacturing glass |
| JP2022-143735 | 2022-09-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117685850A true CN117685850A (en) | 2024-03-12 |
Family
ID=90127260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311109640.1A Pending CN117685850A (en) | 2022-09-09 | 2023-08-30 | Residual thickness measuring device, residual thickness measuring method, and glass manufacturing method |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2024039288A (en) |
| KR (1) | KR20240035710A (en) |
| CN (1) | CN117685850A (en) |
| TW (1) | TW202426849A (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6121170A (en) | 1984-07-09 | 1986-01-29 | Inoue Japax Res Inc | Shoe-shining mixture |
| JPH04342425A (en) | 1991-05-17 | 1992-11-27 | Nippon Sheet Glass Co Ltd | Protection of electrode |
| JP5395000B2 (en) | 2010-06-30 | 2014-01-22 | Ａｇｃセラミックス株式会社 | Method and apparatus for measuring remaining thickness of molten cast refractory |
| JP2018193268A (en) | 2017-05-16 | 2018-12-06 | 日本電気硝子株式会社 | Production method of glass article, and molten glass leakage detector |
-
2022
- 2022-09-09 JP JP2022143735A patent/JP2024039288A/en active Pending
-
2023
- 2023-08-24 TW TW112131812A patent/TW202426849A/en unknown
- 2023-08-30 CN CN202311109640.1A patent/CN117685850A/en active Pending
- 2023-08-30 KR KR1020230114231A patent/KR20240035710A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TW202426849A (en) | 2024-07-01 |
| KR20240035710A (en) | 2024-03-18 |
| JP2024039288A (en) | 2024-03-22 |
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