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Molten glass heating device, glass manufacturing device and method for manufacturing glass articles

A technology for melting glass and heating devices, applied in glass manufacturing equipment, manufacturing tools, glass production, etc., can solve problems such as insufficient heating of branch pipes, and achieve the effect of suppressing inhomogeneity

Active Publication Date: 2019-12-06
AGC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the heating of the conduit, in the case of setting the main pipe and the branch pipe, insufficient heating in the branch pipe may occur

Method used

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  • Molten glass heating device, glass manufacturing device and method for manufacturing glass articles
  • Molten glass heating device, glass manufacturing device and method for manufacturing glass articles
  • Molten glass heating device, glass manufacturing device and method for manufacturing glass articles

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach ＞

[0094] Next, refer to image 3 , the molten glass heating device 210 of the present invention will be described. image 3 It is a schematic diagram explaining the molten-glass heating apparatus 210 which concerns on 1st Embodiment of this invention.

[0095] The molten glass heating device 210 has a composite pipe structure 220 and an electric heating unit 230 . The composite pipe structure 220 includes a conduit forming a flow path through which the molten glass G2 passes. The energization heating unit 230 energizes and heats the composite pipe structure 220 .

[0096] image 3 The composite pipe structure 220 shown has a main pipe (also referred to as a main pipe) 1 as a conduit, an upper branch pipe 2 and a lower branch pipe 3 .

[0097] The main pipe 1 extends substantially vertically with respect to the horizontal direction, and the upper branch pipe 2 branches from the main pipe 1 on the upper side of the main pipe 1 and communicates with the inside of the main pipe ...

no. 2 Embodiment approach ＞

[0180] In this embodiment, for the figure 1 A case where two of the above-mentioned molten glass heating devices are arranged side by side in the shown molten glass conveying device 20 will be described.

[0181] Figure 5 A system 200 having a molten glass heating device according to the second embodiment of the present invention is shown.

[0182] and image 3 The composition is the same, in Figure 5 In the composite pipe structure 220 of the molten glass heating device 210 described on the left side, the lower branch pipe 3 is an introduction pipe for introducing the molten glass G2 into the inlet side of the main pipe 1, and the upper branch pipe 2 is a discharge pipe for discharging the molten glass G2 from the main pipe 1. Tube.

[0183] In the composite pipe structure 250 of the second molten glass heating device 240, the upper branch pipe 2R is an introduction pipe for introducing the molten glass G2 discharged from the upper branch pipe 2 into the inlet side of ...

Embodiment

[0189] For the above-mentioned molten glass heating device, the dimensions were changed, and the surface temperature of the composite pipe structure was calculated by simulation (finite element method). The following examples 1 to 7 are examples, and examples 8 to 10 are comparative examples.

[0190]

[0191] In Example 1, the dimensions of each part in the molten glass heating apparatus were set as follows.

[0192] Head height Hm: 1000mm

[0193] Main pipe inner diameter D1: 200mm

[0194] Branch length L: 450mm

[0195] Branch pipe inner diameter D2: 200mm

[0196] The distance h between the upper end of the main pipe and the upper end of the branch pipe: 220mm

[0197] In examples 2 to 10, the dimensions of each part in the molten glass heating device of example 1 are changed as follows Figure 6 shown.

[0198] exist Figure 6In the table, T0 represents the temperature of the central part of the main pipe 1, T1 represents the temperature of the upper part of the...

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Abstract

The invention relates to a molten glass heating device, a glass manufacturing device and a manufacturing method of glass articles. The present invention provides a molten glass heating device that heats molten glass without causing a temperature difference and suppresses non-uniformity of the molten glass. A molten glass heating device 210, which has a composite pipe structure 220 and an electric heating part 230; the composite pipe structure 220 has a main pipe 1, an upper branch pipe 2 and a lower branch pipe 3; the electric heating part 230 has an electrode 4, an electrode 5 and an electrode 6, and form the first current supply path 21 and the second current supply path 22; the composite pipe structure 220 satisfies the resistance of the current "0.4<(flowing between the upper end 1a of the main pipe 1 and the upper end Ja of the branch part (γ) and the sum of the resistance of the current flowing between the branch portion J of the upper branch pipe 2 and the side end 2a (β) / the resistance of the current flowing between the upper end 1a and the lower end 1b of the main pipe 1 (α))<0.8 "Formation.

Description

technical field [0001] The invention relates to a molten glass heating device, a glass manufacturing device and a manufacturing method of glass articles. Background technique [0002] In glass manufacturing equipment, hollow tubes made of platinum or platinum alloys such as platinum-gold alloys and platinum-rhodium alloys are used as conduits for allowing molten glass at high temperature to pass therethrough. In a glass manufacturing apparatus, in order to ensure the fluidity of molten glass, the conduit|pipe through which molten glass passes is heated. For the heating of the conduit, the conduit is sometimes heated from the outside with a heat source such as a heater, but when the conduit is a hollow tube made of platinum or a platinum alloy, it is widely used to install a tube for conducting electricity on the hollow tube. electrodes and heat the hollow tube. [0003] In the heating of the conduit, when a main pipe and branch pipes are provided, insufficient heating in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B7/07
CPCC03B7/07C03B5/235C03B7/098C03B5/23Y02P40/50
Inventor 村上敏英稻井要介
Owner AGC INC
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