JP2004307223A - Container, and apparatus and method for preparing glass particle deposit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To decrease the occurrence of local uneven cooling in a container for containing an object to be heated, thus preventing bad effects such as the decrease in the life of the container and the quality degradation of the object to be heated; and to prevent foreign matters from sticking to or mixing into a glass particle deposit. <P>SOLUTION: The container 1 contains the glass particle deposit 35. The gap between the outer wall 3 and the inner wall 4 of the side wall 2 of the container 1 is formed as flow channels 16, 16a, 16b, and 16c, and a cooling fluid is caused to flow from the under side to the upper side through the flow channel 16. An apparatus 20 for preparing the glass particle deposit is constructed so that, at the side wall 2 of the container 1, a burner 22 and an exhaust duct 21 are arranged so as to face each other and the glass particle deposit 35 is formed by depositing on a glass rod 36 the glass particles formed by the burner 22. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a container for storing an object to be heated. Further, the present invention relates to an apparatus for manufacturing a glass fine particle deposit provided with a container used for manufacturing a glass fine particle deposit as an object to be heated, and a method for manufacturing a glass fine particle deposit using the container.
[0002]
[Prior art]
Conventionally, as a container for storing an object to be heated, a container configured to actively cool a wall forming the container is used because the container is easily degraded due to high temperature inside the container. (For example, refer to Patent Document 1).
[0003]
FIG. 6 shows a conventional container 100 used when producing a glass particle deposit by a gas phase synthesis method. Inside the container 100, a burner 101 and an exhaust hood 102 are arranged to face each other. The burner 101 generates glass fine particles by an oxyhydrogen flame. Most of the generated glass fine particles are deposited on a glass rod 103 disposed at a position between the burner 101 and the exhaust hood 102, and a glass fine particle deposit body 104 is formed. On the other hand, the glass particles not deposited on the glass bar 103 float in the space inside the container 100 and are exhausted from the exhaust hood 102.
[0004]
As described above, the container 100 generates an oxyhydrogen flame on the inside, and further contains the glass fine particles that are the objects to be heated. Therefore, a plurality of cooling pipes 106 are built in the container wall 105, and the container 100 is cooled by flowing a cooling liquid through the cooling pipes 106.
[0005]
[Patent Document 1]
JP 2000-344530 A
[Problems to be solved by the invention]
By the way, the conventional container as described above has a configuration in which a plurality of cooling locations by cooling pipes are locally provided. Therefore, when the amount of heat generated in the container increases, local cooling unevenness is likely to occur. At that time, a local temperature difference generated on the inner surface of the container becomes large, and thermal fatigue occurs on a wall constituting the inner surface of the container due to a difference in thermal expansion. Due to this thermal fatigue, the life of the container is shortened.
[0007]
In addition, when thermal fatigue gradually accumulates, the wall may be deteriorated and minute peeling may occur. The exfoliated fragments become foreign matters floating in the space in the container, and may adversely affect the object to be heated housed in the container. For example, when glass particles are deposited as shown in FIG. 6, the peeled fragments may adhere to or mix in the glass particle deposit, deteriorating the quality of the glass particle deposit. Would.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to reduce the occurrence of local uneven cooling of a container accommodating an object to be heated, and to prevent adverse effects such as a reduction in the life of the container and a decrease in quality of the object to be heated. Another object of the present invention is to provide an apparatus and a method for manufacturing a glass fine particle deposit that can prevent foreign substances from adhering to and mixing with the glass fine particle deposit.
[0009]
[Means for Solving the Problems]
A container according to the present invention for achieving the above object is a container for accommodating an object to be heated, in which a flow path of a cooling fluid is formed in a side wall of the container, and a flow path is formed at a lower end of the flow path. A supply section for supplying a cooling fluid is provided, and a discharge section for discharging the cooling fluid from the flow path is provided at an upper end of the flow path.
[0010]
Further, a container according to the present invention for achieving the above object is a container for accommodating an object to be heated, wherein a flow path of a cooling fluid is formed in a side wall of the container, and a flow path is provided at an upper end of the flow path. A supply unit that supplies a cooling fluid to the passage is provided, and a discharge unit that discharges the cooling fluid from the flow passage is provided at a lower end of the flow passage, and the discharge unit guides the cooling fluid upward from an upper end of the flow passage. It is characterized by being constituted.
[0011]
Further, a container according to the present invention for achieving the above object is a container for accommodating an object to be heated, wherein a gap between a plurality of layers constituting a side wall of the container is formed as a flow path of a cooling fluid. The cross-sectional shape of the flow path is characterized in that it is formed so as to partially surround a space for accommodating the object to be heated.
[0012]
In the container according to the present invention, it is preferable that the flow path is divided into a plurality of sections having different flows.
[0013]
Further, the apparatus for producing a glass fine particle deposit according to the present invention for achieving the above object includes the container according to the present invention, and a burner and an exhaust port are arranged on a side wall so as to face each other. The method is characterized in that the generated glass fine particles as the object to be heated are deposited on a base placed in the container to form a glass fine particle deposit.
[0014]
Further, a method for producing a glass fine particle deposit according to the present invention for achieving the above object is characterized by producing a glass fine particle deposit using the above-described glass fine particle deposit manufacturing apparatus according to the present invention. I have.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a container, a manufacturing apparatus and a manufacturing method of a glass fine particle deposit according to the present invention will be described with reference to the drawings.
(1st Embodiment)
The container according to the present embodiment is a container for storing glass fine particles as an object to be heated, and is characterized in that a gap between walls of a plurality of layers constituting a side wall of the container is formed as a flow path of a cooling fluid. . In the container of the present embodiment, a supply unit that supplies a cooling fluid to the flow path is provided at a lower end of the flow path, and a discharge unit that discharges the cooling fluid from the flow path is provided at an upper end of the flow path. It is characterized in that the cooling fluid flows from the lower part of the path to the upper part.
[0016]
FIG. 1 is a perspective view showing a container 1 of the present embodiment.
As shown in FIG. 1, the container 1 has a substantially rectangular parallelepiped box shape mainly including a plurality of plate-shaped members. The plate-like member includes side walls 2 forming three side surfaces of the container 1, a door 9 forming one side surface, two upper lids 6 forming an upper surface of the container 1, and a lower surface of the container 1. The bottom wall 8 is formed.
These plate-shaped members are made of a nickel alloy, such as Inconel (registered trademark) or Hastelloy (registered trademark), which does not easily corrode in a high-temperature and chlorine-gas atmosphere environment, for example, when manufacturing a glass particle deposit. Is formed. When corrosive gas is not used in the container 1, stainless steel or steel may be used.
[0017]
In one of the opposing surfaces of the side wall 2, a burner opening 13 for inserting and installing a burner 22 (see FIG. 2) for generating glass particles in the container 1 is formed. An exhaust opening 11 for inserting and installing an exhaust duct 21 (see FIG. 2) for exhausting the gas in the container 1 is formed on the other of the opposing surfaces of the side wall 2.
The door 9 is attached to the side wall 2 by a hinge or the like so as to be openable and closable (see FIG. 2), and is provided with a window 12 for observing the inside of the container 1 from outside. The window 12 is preferably made of heat-resistant glass or the like.
[0018]
The two upper lids 6 each have a size obtained by dividing the upper surface of the container 1 into two parts, and are attached to the upper end of the side wall 2 by a hinge or the like so as to be freely opened and closed. Each upper lid 6 is provided with a concave portion 7 at an end opposite to the side attached to the side wall 2 so that a circular hole is formed at a center portion thereof with both upper lids 6 closed. ing.
The bottom wall 8 is attached to the lower end of the side wall 2 so as to cover the entire lower surface of the container 1. In some cases, a through hole is provided in the bottom wall 8 and a rectangular or cylindrical container is connected to a lower portion thereof.
[0019]
FIG. 2 shows a cross-sectional view of the above-described container 1 and an apparatus 20 for manufacturing a glass fine particle deposit provided with the container 1.
As shown in FIG. 2, the side wall 2 of the container 1 has two layers of an outer wall 3 and an inner wall 4, and a gap between the outer wall 3 and the inner wall 4 forms a flow path 16 for flowing a cooling fluid. , 16a, 16b, 16c. Each of these flow paths 16, 16a, 16b, 16c is partitioned by the partition member 5, but is configured such that the cooling fluid flows over substantially the entire area inside the side wall 2 as a whole. That is, the flow paths 16, 16 a, 16 b, and 16 c are formed so as to surround three surfaces formed by the side walls 2 with respect to the space inside the container 1.
[0020]
When the side wall 2 is formed of three or more layers of walls, any gap between the walls of the plurality of layers may be formed as a flow path.
The flow paths 16, 16a, 16b, and 16c are preferably completely partitioned by the partition member 5, but may be partially partitioned.
[0021]
In the outer wall 3 of the side wall 2, a plurality of passage openings 15 for connecting the flow passages 16, 16a, 16b, 16c to an external space are provided at positions corresponding to the upper ends or lower ends of the flow passages 16, 16a, 16b, 16c. Is provided. The passage opening 15 constitutes a part of a supply part or a discharge part when supplying or discharging the cooling fluid to or from the flow paths 16, 16a, 16b, 16c.
[0022]
When manufacturing a glass particle deposit using this container 1, as shown in FIG. 2, a burner 22 is installed in the burner opening 13, and an exhaust duct 21 serving as an exhaust port is installed in the exhaust opening 11. Is installed. A plurality of burners 22 may be used depending on the type of the vapor phase synthesis method. In this case, a plurality of burners 22 can be provided so as to be arranged vertically in the burner opening 13. In addition, a plurality of exhaust ducts 21 may be provided depending on the number of burners 22 used. Further, the space between the exhaust opening 11 and the exhaust duct 21 is appropriately filled so that there is no gap.
[0023]
Further, a glass rod 36 serving as a base on which glass fine particles are deposited is passed through a hole formed by the concave portion 7 (see FIG. 1) of the upper lid 6, and the glass rod 36 is disposed at a substantially central portion in the container 1. You. In addition, an inert gas such as nitrogen from which dust has been removed is supplied from the gap between the concave portion 7 and the glass rod 36 toward the inside of the container 1.
Further, when a through hole is provided in the bottom wall 8, the glass rod 36 can be inserted through the through hole and arranged.
[0024]
The burner 22 generates oxygen-hydrogen flame toward the glass rod 36 when oxygen, hydrogen, and a raw material gas for glass are introduced. In this oxyhydrogen flame, glass particles are generated by a hydrolysis reaction. Then, the glass fine particles are deposited around the glass rod 36 to form a glass fine particle stack 35.
Further, the glass fine particles floating in the container 1 without being deposited on the glass rod 36 are exhausted together with the gas in the container 1 by the exhaust duct 21 arranged to face the burner 22.
[0025]
As described above, in the apparatus 20 for manufacturing a glass fine particle deposit shown in FIG. 2, the burner 22 and the exhaust duct 21 are arranged on the side wall 2 of the container 1 so as to face each other, and the glass fine particles generated by the burner 22 are formed. Can be deposited on the glass rod 36 to form the glass particle deposit body 35.
The vapor phase synthesis method for depositing glass particles using the container 1 of the present embodiment is not limited to a particular mode. Further, the container 1 can also be used for sintering a glass fine particle deposit to make it transparent, or for stretching a transparent glass body. In that case, the burner opening 13 is unnecessary.
[0026]
When manufacturing the glass fine particle deposit 35, the temperature of the burner 22 becomes about 2000 ° C. to 2700 ° C., and the temperature of the glass fine particle deposit 35 becomes about 800 ° C. to 900 ° C. Therefore, in order to reduce the load on the container 1 due to the heat generated inside the container 1, a cooling fluid is caused to flow through the flow paths 16, 16a, 16b, and 16c provided in the side wall 2 to cool the container 1. . FIG. 3 is a schematic diagram showing the state of the flow of the cooling fluid.
[0027]
As shown in FIG. 3, a conduit 27 and a pump 26 are attached to the passage opening 15 provided at the lower end of the flow path 16. The passage opening 15, the pipe 27, and the pump 26 constitute a supply unit 28 that supplies the cooling fluid to the flow passage 16.
On the other hand, a conduit 29 is attached to the passage opening 15 provided at the upper end of the flow passage 16. The passage opening 15 and the pipe line 29 constitute a discharge unit 30 that discharges the cooling fluid from the flow path 16.
The cooling fluid is supplied to the flow path 16 by the pump 26 provided in the supply unit 28. Then, the supplied cooling fluid flows upward from below in the flow path 16 and is discharged from the discharge unit 30.
[0028]
Further, in the embodiment shown in FIG. 3, the supply pump 26 is provided in the supply unit 28, but the pump may be provided in one of the supply unit and the discharge unit. Further, both a supply pump and a discharge pump may be provided.
Further, the supply unit 28 and the conduits 27 and 29 of the discharge unit 30 may be connected to circulate the cooling fluid. In that case, it is preferable that there is a means for removing heat from the cooling fluid in the middle of the circulation path. For example, there is a means for flowing a refrigerant around the pipe line 29 by providing a chiller or the like.
In the case of circulating the cooling fluid, it is easy to increase the pressure of the cooling fluid in the flow path 16, so that the cooling efficiency is easily increased.
[0029]
In addition, if the pump is provided with a flow rate adjusting function, the amount and speed of the cooling fluid flowing in the flow path 16 can be adjusted, and the cooling intensity is adjusted according to the temperature inside the container 1. can do.
Further, by setting the temperature of the cooling fluid supplied from the supply unit 28 to a desired temperature in advance, the cooling intensity can be adjusted.
[0030]
In the present embodiment, a gas such as helium gas is preferably used as the cooling fluid. Helium has a high thermal conductivity and is excellent for use as a cooling fluid. Also, a liquid cooling fluid can be used.
As the cooling fluid, besides the above-mentioned helium gas, nitrogen gas, air, chlorofluorocarbon, water, mineral oil and the like can be used. Furthermore, in order to prevent clogging of the flow path 16, the supply unit 28 and the discharge unit 30, it is preferable to add a clogging inhibitor to the cooling fluid. Examples of the clogging inhibitor include a scale inhibitor, a rust inhibitor, a bactericidal / algicidal agent, and the like. When a gaseous cooling fluid is used, a flow straightening plate 14 is preferably provided in the flow path 16 to stabilize the flow direction in the flow path 16. Thereby, a stable cooling effect is easily obtained in the entire area in the flow path 16.
[0031]
Although the flow of the cooling fluid in the flow path 16 has been described with reference to FIG. 3, the same supply and discharge sections are provided in the other flow paths 16a, 16b, and 16c to flow the cooling fluid.
Further, in the case of the apparatus 20 for manufacturing a glass fine particle deposit according to the present embodiment shown in FIG. 2, a portion facing the burner 22 is likely to be particularly hot due to the oxyhydrogen flame generated from the burner 22. That is, in the side wall 2 of the container 1, the temperature around the exhaust duct 21 facing the burner 22 tends to be high. For this reason, it is preferable that a cooling fluid be flown so as to particularly positively improve the cooling efficiency in the area around the exhaust duct 21 in the flow paths 16 a and 16 c defined as separate flow paths from the flow path 16.
[0032]
As described above, in the container 1 of the present embodiment, the flow paths 16, 16a, 16b, and 16c are formed almost entirely in the side wall 2 so as to at least partially surround the space of the container 1. In addition, uneven cooling generated on the side wall 2 can be minimized. Therefore, it is possible to suppress a reduction in the life of the container 1 due to thermal fatigue.
Further, since it is possible to suppress the occurrence of a local temperature difference in the inner wall 4, deterioration of the inner wall 4 caused by accumulation of thermal fatigue is prevented, and occurrence of minute peeling from the inner wall 4 is also prevented. Therefore, according to the method for manufacturing glass fine particles using the apparatus 20 for manufacturing glass fine particles, it is possible to manufacture a high-quality glass fine particle deposit 35 in which adhesion and mixing of foreign matter are prevented.
[0033]
(2nd Embodiment)
In the above-described first embodiment, the supply unit 30 is provided at the lower end of the flow path 16, and the discharge unit 28 is provided at the upper end of the flow path 16. Although it is configured to flow, the direction of this flow may be reversed.
As shown in FIG. 4, a conduit 27 and a pump 26 are attached to a passage opening 15 provided at the upper end of the flow path 16 in the second embodiment, and a supply unit 28 is configured. In addition, a conduit 29 a is attached to the passage opening 15 provided at the lower end of the flow path 16, and a discharge unit 31 is configured.
The cooling fluid is supplied to the flow path 16 by the pump 26 provided in the supply unit 28. Then, the supplied cooling fluid flows downward from above in the flow path 16 and is discharged from the discharge unit 31.
[0034]
The conduit 29a of the exhaust unit 31 is provided with an upper conduit 29b for guiding the discharged cooling fluid upward from the upper end of the flow path 16 once. Thus, even when a liquid cooling fluid is used, the cooling fluid supplied to the flow path 16 fills the entire area in the flow path 16 before being discharged to the outside of the discharge unit 31. Therefore, even if the cooling fluid is a liquid, the entire side wall 2 can be reliably cooled.
When the cooling fluid is a gas, it is not necessary to provide the upper conduit portion 29b to guide the cooling fluid upward from the upper end of the flow path 16.
[0035]
In the second embodiment described above, the same cooling effect as in the first embodiment can be obtained.
[0036]
(Third embodiment)
The heat of the burner 22 and the glass particle deposit body 35 is easily transmitted upward in the container 1. Therefore, in FIG. 2, the flow paths 16 and 16b flow the cooling fluid from the bottom to the top, while the flow paths 16a and 16c flow the cooling fluid from the top to the bottom so as to actively cool the region above the flow path. It may be made to flow to. Thus, in a state where the cooling fluid supplied to the flow paths 16a and 16c is as low as possible, it is possible to cool the portion of the side wall 2 where the temperature is likely to be the highest. When a liquid cooling fluid is used, it is preferable that the discharge portions of the flow paths 16a and 16c guide the cooling fluid upward from the upper ends of the flow paths 16a and 16c, as shown in FIG.
As described above, in the method for manufacturing glass fine particles of the present embodiment using the apparatus 20 for manufacturing glass fine particles, the flow state of the cooling fluid is effectively set for the plurality of flow paths provided in the side wall 2. In this way, cooling is efficiently performed on a portion that easily becomes high in temperature.
[0037]
Although the container 1 shown in FIGS. 1 and 2 has a substantially rectangular parallelepiped box shape, the shape of the container is not particularly limited.
For example, in a case where a plurality of burners 22 are installed in the lateral direction with respect to the container 1a as in the apparatus 20a for manufacturing a glass particle deposit shown in FIG. It is preferable to change the cross-sectional shape of the container 1a so that the container 1a can be easily arranged so as to face. The entire shape of the flow path formed by the flow paths 17, 17a, 17b, and 17c between the outer wall 3a and the inner wall 4a is preferably formed so as to partially cover the space in the container 1a. This prevents local uneven cooling in the container 1a.
[0038]
In the present invention, not only the flow path for flowing the cooling fluid is provided in the side wall, but also a flow path may be provided for each of the plate-like members constituting the wall of the container.
[0039]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the container which concerns on this invention, the generation | occurrence | production of the local cooling unevenness of the container which accommodates a to-be-heated object is reduced, and the life of a container is shortened, and generation | occurrence | production of the bad influences, such as quality deterioration with respect to a to-be-heated object, is prevented. Can be. Further, according to the apparatus and method for manufacturing a glass fine particle deposit according to the present invention, it is possible to prevent foreign matter from adhering to and mixing with the glass fine particle deposit.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of an embodiment of a container according to the present invention.
FIG. 2 is a cross-sectional view showing an example of an embodiment of the apparatus for manufacturing a glass fine particle deposit according to the present invention.
FIG. 3 is a schematic view showing a state in which a cooling fluid flows upward from below.
FIG. 4 is a schematic view showing a state in which a cooling fluid flows from above to below.
FIG. 5 is a cross-sectional view showing another example of the embodiment of the apparatus for manufacturing a glass fine particle deposit according to the present invention.
FIG. 6 is a sectional view showing a conventional container.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Container 2 Side wall 3 Outer wall 4 Inner wall 6 Top lid 8 Bottom wall 9 Door 15 Passage openings 16, 16a, 16b, 16c Flow paths 20, 20a Manufacturing apparatus 21 for glass particle deposits Exhaust duct (exhaust port)
22 Burner 28 Supply unit 30, 31 Discharge unit 35 Glass particle deposit 36 Glass rod (base)

Claims (6)

A container for storing an object to be heated,
A cooling fluid flow path is formed in the side wall of the container,
A supply unit that supplies the cooling fluid to the flow path is provided at a lower end of the flow path,
A container provided with a discharge section for discharging the cooling fluid from the flow path at an upper end of the flow path. A container for storing an object to be heated,
A cooling fluid flow path is formed in the side wall of the container,
A supply unit that supplies the cooling fluid to the flow path is provided at an upper end of the flow path,
A discharge section for discharging the cooling fluid from the flow path is provided at a lower end of the flow path,
The container, wherein the discharge unit is configured to guide the cooling fluid upward from an upper end of the flow path. A container for storing an object to be heated,
A gap between a plurality of layers constituting the side wall of the container is formed as a flow path of the cooling fluid,
A container, wherein a cross-sectional shape of the flow path is formed so as to partially surround a space for accommodating the object to be heated. The container according to any one of claims 1 to 3, wherein the flow path is divided into a plurality of sections having different flows. A container according to any one of claims 1 to 4, comprising:
A burner and an exhaust port are arranged on the side wall so as to face each other,
Glass fine particle deposition, wherein the glass fine particles as the object to be heated generated by the burner are deposited on a base arranged in the container to form a glass fine particle deposit. Body manufacturing equipment. A method for manufacturing a glass fine particle deposit, comprising manufacturing the glass fine particle deposit using the apparatus for manufacturing a glass fine particle deposit according to claim 5.

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