Continuous and centralized feeding device for coating materials as well as feeding method and control method of continuous and centralized feeding device

Abstract

The invention relates to a continuous and centralized feeding device for coating materials as well as a feeding method and a control method of the continuous and centralized feeding device. The device comprises a material tank, a plurality of buffer tanks and connecting pipelines thereof and two programmable logic controllers (PLC), wherein the buffer tanks are connected in parallel through distribution pipes; a manual valve, a pneumatic diaphragm pump, a pressure sensor and a one-way valve are sequentially arranged on the connecting pipelines between an outlet of the material tank and the distribution pipes of the buffer tanks; a pneumatic valve is respectively arranged in the front of a feed pipe of each buffer tank; the buffer tanks are sealed; the buffer tank comprises a feed pipe, a discharge pipe, a low liquid level detector, a high liquid level detector and a pressure sensor; one PLC is connected with the pressure sensor on the pipeline and the pressure sensors on the buffer tanks; the other PLC is connected with the pneumatic diaphragm pump, the low liquid level detectors and the high liquid level detectors. The device disclosed by the invention is high in automation degree, simple in equipment structure, small in pipeline number and convenient to maintain and clean and has the advantages of increasing the production efficiency and reducing the production cost.

Description

technical field [0001] The invention relates to the field of optical fiber manufacturing, in particular to a coating material continuous centralized feeding device, a feeding method and a control method thereof. Background technique [0002] In recent years, with the rapid development of my country's optical fiber industry, optical fiber manufacturing technology has become increasingly mature. In order to reduce the manufacturing cost of optical fiber and improve competitiveness, high-speed wire drawing and large preform wire drawing technology have developed rapidly, and soon became the mainstream wire drawing technology. During the drawing process, optical fiber coating and its supply are carried out continuously. The traditional optical fiber coating supply mode is to equip each drawing line or each drawing tower with an independent optical fiber coating supply system. The optical fiber coating material supply system is mainly composed of two parts, one is the buffer tan...

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Problems solved by technology

[0004] 2. In the traditional optical fiber coating material supply system, it is necessary to frequently open the large material tank to add coating material, which will cause air to be mixed into the coating material supply system

[0005] 3. In the traditional optical fiber coating material supply system, when adding coating material from the large material tank to the buffer tank online, a fixed supply pressure value is used; and the pressure in the buffer tank is closely related to the actual drawing speed , Therefore, in order to ensure that the coating material can be added normally under any pressure in the buffer tank, it is necessary to set the supply pressure value to be slightly higher than the maximum pressure value that may occur in the buffer tank; when the buffer tank When the internal pressure is small, the supply pressure is much higher than the pressure in the buffer tank. On the one hand, it will cause the added coating material to spray at the outlet of the pipeline, resulting in bubbles in the coating material, which will cause the drawn optical fiber to be coated. Defects; on the other hand, due to the conduction of pressure, it will cause pressure fluctuations in the buffer tank, which seriously affects the stability of the drawing process

[0006] 4. In the traditional optical fiber coating material supply system, it is necessary to equip each wire drawing production line or each wire drawing tower with an independent optical fiber coating material supply system, which leads to various and complicated optical fiber coating material supply equipment and pipelines. , therefore, the processing cost is relatively high, and it is inconvenient to clean the pipeline and maintain the equipment in the later stage

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