Efficient cooling pipe and cooling method thereof

Abstract

The invention discloses an efficient cooling pipe and a cooling method thereof. The efficient cooling pipe comprises a cooling pipe body, a pipe wall inner water tank is arranged in the cooling pipe body, one end of a cooling water inlet pipe communicates with the lower end of the pipe wall inner water tank, and one end of a cooling water outlet pipe communicates with the upper end of the pipe wall inner water tank; one end of a compressed air inlet pipe is communicated with the upper end of the pipe wall inner water tank and located above the cooling water level of the pipe wall inner water tank; a first electromagnetic valve is arranged on the cooling water inlet pipe; a second electromagnetic valve is arranged on the compressed air inlet pipe; and a vacuum pump is arranged on the cooling water outlet pipe. The cooling water sealed in the pipe wall inner water tank is vacuumized to reduce the boiling point of the cooling water, so that the cooling water can be vaporized at normal temperature to take away a large amount of heat, the optical fiber cooling effect is improved, the use efficiency of cooling gas can be improved, and the gas consumption is reduced; or nitrogen can be used for replacing the current helium, so that the production cost is reduced.

Description

technical field [0001] The invention relates to a cooling pipe and a cooling method thereof, in particular to a high-efficiency cooling pipe and a cooling method thereof, and belongs to the field of optical fiber manufacturing. Background technique [0002] When the optical fiber is drawn at high speed, the temperature of the optical fiber when it comes out of the drawing furnace is between 1500°C and 2000°C. Due to the high speed of optical fiber production, when the optical fiber reaches the coating system, if the cooling of the optical fiber is not in place, the temperature of the optical fiber and the coating will be caused. The temperature difference is too large, which will lead to abnormal fiber coating and affect product quality. At present, the method adopted by our company is to install a cooling tube on the route of the optical fiber, fill the cooling tube wall with cooling liquid water to cool the optical fiber, and fill the cooling tube with helium as a cooling ...

AI Technical Summary

Problems solved by technology

[0002] When the optical fiber is drawn at high speed, the temperature of the optical fiber when it comes out of the drawing furnace is between 1500°C and 2000°C. Due to the high speed of optical fiber production, when the optical fiber reaches the coating system, if the cooling of the optical fiber is not in place, the temperature of the optical fiber and the coating will be caused. The temperature difference is too large, which will lead to abnormal fiber coating and affect product quality

At present, the method adopted by our company is to install a cooling tube on the route of the optical fiber, fill the cooling tube wall with cooling liquid water to cool the optical fiber, and fill the cooling tube with helium as a cooling gas to contact the optical fiber. The advantage of gas is its high specific heat capacity, which is 5.24KJ / kg*K at room temperature, and the heat exchange speed is fast, so even if the cooling temperature difference is not large, helium can absorb a large amount of heat; the disadvantage of helium is that it is used as a Rare gases are expensive and need to be imported

Therefore, long-term large-scale use of helium as cooling gas is not conducive to production cost control

Some related patents propose to use hydrogen or nitrogen instead of helium for cooling. The cooling effect of the former is better than that of helium, but it is extremely explosive and has potential safety hazards. Although nitrogen is cheap and non-explosive, its cooling effect is far inferior to that of helium. to production requirements

Images