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Sintering device for large-size optical fiber loosing powder rod and method

A sintering device and large-scale technology, applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problems of unmentioned gas concentration distribution and full utilization, and achieve the goal of reducing the content of OH ions, reducing resource consumption, and enhancing the degree of turbulence Effect

Active Publication Date: 2017-12-26
长飞光纤潜江有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the above patents mentioned the concentration distribution and full utilization of the gas in the sintering device.

Method used

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  • Sintering device for large-size optical fiber loosing powder rod and method
  • Sintering device for large-size optical fiber loosing powder rod and method
  • Sintering device for large-size optical fiber loosing powder rod and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]The loose powder rod 7 is clamped at the lower end of the quartz push rod 2, and the loose powder rod 7 is sent to the upper part of the sintering furnace core tube 6 through the rod feeding device 1; after the loose powder rod 7 is in place, the cover plate 3 on the top of the sintering furnace core tube 6 Also cover at the same time; Utilize induction heating furnace 8 to increase the temperature in the furnace core tube to 1000 ° C, and pass into process gases such as chlorine and helium of a specified amount through the air inlet 12 in the furnace core tube, the flow rate of chlorine is 0.05slm, helium The flow rate of the gas is 5slm, and the rod feeding device 1 is opened to send the loose powder rod 7 downward at a speed of 10mm / min, and rotate through the heating furnace 8 hot zones at a speed of 1rpm. After completing the dehydration program of the entire loose powder rod 7, The rod body stops at the position where the dehydration ends (at this time, the distance...

Embodiment 2

[0036] The loose powder rod 7 is clamped at the lower end of the quartz push rod 2, and the loose powder rod 7 is sent to the upper part of the sintering furnace core tube 6 through the rod feeding device 1; after the loose powder rod 7 is in place, the cover plate 3 on the top of the sintering furnace core tube 6 Also cover at the same time; Utilize induction heating furnace 8 to increase the temperature in the furnace core tube to 1200 ° C, and pass into process gases such as chlorine and helium of a specified amount through the air inlet 12 in the furnace core tube 6, the flow rate of chlorine is 1slm, , the flow rate of helium is 10slm, and the rod feeding device 1 is opened to send the loose powder rod 4 downward at a speed of 15mm / min, and rotate through the heating furnace 8 hot zones at a speed of 3rpm, when the dehydration program of the entire loose powder rod 7 is completed Finally, the rod body stops at the position where the dehydration ends (at this time, the dist...

Embodiment 3

[0038] The loose powder rod 7 is clamped at the lower end of the quartz push rod 2, and the loose powder rod 7 is sent to the upper part of the sintering furnace core tube 6 through the rod feeding device 1; after the loose powder rod 7 is in place, the cover plate on the top of the sintering furnace core tube 6 is also Cover simultaneously; Utilize the induction heating furnace 8 to increase the temperature in the core tube to 1300°C, and pass into process gases such as chlorine and helium of a specified amount through the air inlet 12 in the core tube 6, the flow rate of chlorine is 2slm, The flow rate of helium is 20slm, and the rod feeding device 1 is opened to send the loose powder rod 7 downward at a speed of 20mm / min, and rotate through the hot zone of the heating furnace at a speed of 5rpm. After the dehydration procedure of the entire loose powder rod 7 is completed, The rod body stops at the position where the dehydration ends (at this moment, the distance between the...

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Abstract

The invention discloses a sintering device for a large-size optical fiber loosing powder rod and a method. The sintering device comprises a sintering furnace core pipe and a rod conveying device, wherein the rod conveying device is used for realizing the up-and-down and rotating motion of a loosing powder rod in the sintering furnace core pipe; an air inlet is formed at the bottom of the sintering furnace core pipe; an air outlet is formed on the upper part of the sintering furnace core pipe; a flow guide cover is arranged under the loosing powder rod on the inner wall of the sintering furnace core pipe; an air guide cover is arranged as a conical air guide cover with small upper part and big lower part; and the air guide cover is located above the air inlet. According to the invention, the flow guide cover is arranged for guaranteeing the concentrated distribution of the reaction gas on the middle part of the sintering furnace core pipe and more effective contact with the loosing powder rod; the flowing section area is reduced, the air flow speed is increased and the air turbulence degree is increased, so that the thickness of surface air film of the loosing powder rod is reduced; the dispersing of the reaction gas into the loosing powder rod is benefited, so that an optical fiber prefabricated rod with low and uniform OH ion content can be acquired and the resource consumption can be reduced.

Description

technical field [0001] The invention belongs to the technical field of optical fiber prefabricated rod manufacturing, and in particular relates to a sintering device and method for a large-size optical fiber loose powder rod. Background technique [0002] With the country's policy support for the information industry - the fiber-to-the-home and the integration of three networks, etc. are in full swing. With the rapid development of the optical communication industry, my country's optical fiber preform industry has made great progress. However, there is still a certain gap between my country's optical fiber prefabrication industry and the international advanced level in terms of process and equipment technology, which is finally reflected in the cost of prefabricated rods. The most effective way to solve the preform cost dilemma is to develop large-size optical fiber preform technology and realize the localization of fully synthetic optical fiber preform process materials. ...

Claims

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Application Information

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IPC IPC(8): C03B37/014
CPCC03B37/0146Y02P40/57
Inventor 谈立君渠驰张宏胜刘二明杨柳波王有志徐超王聍朱进勇
Owner 长飞光纤潜江有限公司
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