阅读说明：本技术 一种半开合式光纤降温装置 (Half open-close type optical fiber cooling device ) 是由 袁积鸿 卫晓明 王继佩 张兴飞 刘世浩 李旭伟 谢康 于 2019-11-22 设计创作，主要内容包括：本发明涉及光纤制造领域,具体涉及一种半开合式光纤降温装置。由多个降温单体组成,降温单体包括驱动装置、支架、铰支机构、固定端及活动端,所述驱动装置与固定端均安装在支架上,驱动装置与活动端之间通过铰支机构相连,铰支机构一端还与固定端相连；本发明通过达到冷却管内壁易清洁、使用冷媒气体需求量小、光纤抖动小及出口光纤温度稳定的使用效果,实现了提升生产效率、降低生产成本及获得优良涂覆直径的需求。(The invention relates to the field of optical fiber manufacturing, in particular to a semi-open type optical fiber cooling device. The cooling single body comprises a driving device, a support, a hinge support mechanism, a fixed end and a movable end, wherein the driving device and the fixed end are both arranged on the support, the driving device is connected with the movable end through the hinge support mechanism, and one end of the hinge support mechanism is also connected with the fixed end; the invention achieves the use effects of easy cleaning of the inner wall of the cooling pipe, small demand of using refrigerant gas, small optical fiber jitter and stable temperature of the outlet optical fiber, and realizes the requirements of improving the production efficiency, reducing the production cost and obtaining excellent coating diameter.)

1. A semi-open type optical fiber cooling device is composed of a plurality of cooling single bodies, and is characterized in that each cooling single body comprises a driving device, a support (2), a hinged support mechanism, a fixed end (11) and a movable end (6), wherein the driving device and the fixed end (11) are both arranged on the support (2), the driving device is connected with the movable end (6) through the hinged support mechanism, and one end of the hinged support mechanism is also connected with the fixed end (11);

wherein, stiff end (11) are the same with expansion end (6) structure and are the axial symmetry setting, have all seted up the cooling water passageway on stiff end (11) and expansion end (6), can form fibre channel (7) when stiff end (11) and expansion end (6) laminating, and fibre channel (7) both ends still are equipped with sealing strip (9), all seted up air inlet (29) on stiff end (11) and expansion end (6), air inlet (29) all are tangent with fibre channel (7) and are connected, and air inlet (29) are convenient for inert gas and let in, cooling water course (8) still pass through the booster pump with the constant temperature basin and link to each other.

2. A semi-openable optical fiber cooling device according to claim 1, wherein the hinge mechanism comprises a first connecting rod (4) and a second connecting rod (3), the first connecting rod (4) is connected to the driving device at one end and connected to the movable end (6) at the other end, the second connecting rod (3) is connected to the fixed end (11) at one end and connected to a point on the first connecting rod (4) at the other end to form an interlacing point (5).

3. A semi-open optical fiber cooling device according to claim 2, wherein the air inlet (29) of the fixed end (11) is opposite to the air inlet (29) of the movable end (6), and the distance between the two air inlets (29) is 0.5 m.

4. A semi-open optical fiber cooling device as claimed in claim 3, wherein the fixed end (11) and the movable end (6) are further symmetrically provided with a boss (10) and a concave hole, wherein the boss (10) and the concave hole are adapted.

5. The semi-open optical fiber cooling device according to claim 4, wherein the cooling water channels (8) in the cooling single bodies are connected through a hose (15), and the hose (15) is further provided with a metal joint (14).

6. The semi-open optical fiber cooling device according to claim 5, wherein the inert gas is helium, and the inert gas is supplied through a helium tank.

7. A semi-open optical fiber cooling device according to claim 6, wherein the driving means is a pneumatic cylinder (12).

Technical Field

The invention relates to the field of optical fiber manufacturing, in particular to a semi-open type optical fiber cooling device.

Background

In the optical fiber drawing link, an optical fiber preform rod is heated in a drawing furnace to be in a molten state, and is drawn into an optical fiber with a certain diameter under the traction of external force, and the optical fiber drawing speed is increased again and again due to the continuous development of science and technology and the increasing competition in the industry. Some manufacturers in China have the fastest drawing speed of 3000m/min, the outlet temperature of a formed optical fiber at the extending pipe-loading outlet of a drawing furnace is about 1100 ℃, and the temperature of the formed optical fiber is required to be reduced to below 50 ℃ in a short time in order to ensure the subsequent two times of acrylic resin coating. If the optical fiber temperature is too high during coating, the coating temperature can be changed when the optical fiber is contacted with acrylic resin (also called coating), the coating defect or production abnormality of the optical fiber is caused, the defect and the abnormality are irreversible, and the product scrapping or the loss of production time is directly caused, so an optical fiber cooling device is additionally arranged at one end of a drawing furnace and a coating die, constant-temperature circulating water is arranged in the device, helium is introduced into an optical fiber channel, the helium absorbs the heat of the optical fiber and exchanges the heat to the circulating water, and the heat of the circulating water is exchanged to the atmospheric environment by a water cooler, so that the rapid cooling of the optical fiber is finished.

The existing optical fiber cooling devices have two types, the first type is an open-close type cooling device, and the optical fiber cooling device has the advantages of convenience in operation, easiness in cleaning and high cooling efficiency; the defects that the requirement on the calibration precision of a cooling device with the length of 8 meters or more is extremely high, the requirement on the cooperative consistency of the air cylinder and the air pressure is high, the tightness is difficult to ensure that a large amount of helium is lost, and the maintenance is frequent; patent CN104973771 discloses an integral type heat sink, its advantage is that sealing performance is good, maintain simple and convenient and the maintenance cycle is long and the shortcoming is that the cleanness degree of difficulty is high, the helium quantity is big, because of the long and little of fiber channel, the clear and collimation of passageway directly influences optical fiber strength. In addition to the above problems, the existing cooling device has the air inlet designed to be aligned with the center of an optical fiber channel, when the cooling device is normally used, air flow has an impact effect on the optical fiber to enable the optical fiber to shake, fiber breakage of a drawing tower is easily caused by shaking of the optical fiber under high-speed drawing, and mass production time and drawing qualification rate are lost.

The helium cooling device with the two existing structures has outstanding defects in practical application, and influences the time or cost input and the product yield in the production process of the optical fiber drawing process. The applicant has made an advantageous design for this purpose, in the context of which the following technical solutions are made.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a semi-open type optical fiber cooling device capable of improving the cooling stability of an optical fiber.

The invention relates to a semi-open type optical fiber cooling device which comprises a plurality of cooling monomers, wherein each cooling monomer comprises a driving device, a support, a hinged support mechanism, a fixed end and a movable end, the driving device and the fixed end are both arranged on the support, the driving device and the movable end are connected through the hinged support mechanism, and one end of the hinged support mechanism is also connected with the fixed end; wherein, stiff end and activity end structure are the same and are the axial symmetry setting, have all seted up the cooling water passageway on stiff end and the activity end, can form fiber channel when stiff end and activity end laminating, and the fiber channel both ends still are equipped with the sealing strip, the air inlet has all been seted up on stiff end and the activity end, and the air inlet all is tangent with fiber channel to be connected, and the air inlet is convenient for inert gas and lets in, the cooling water course still passes through the booster pump with the constant temperature basin and links to each other.

Preferably, the hinge support mechanism comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is connected with the driving device, the other end of the first connecting rod is connected with the movable end, one end of the second connecting rod is connected with the fixed end, and the other end of the second connecting rod and one point on the first connecting rod form an interweaving point.

Preferably, the air inlet on the fixed end is opposite to the air inlet on the movable end, and the distance between the two air inlets is 0.5 m.

Preferably, the fixed end and the movable end are symmetrically provided with a boss and a concave hole, wherein the boss is matched with the concave hole.

Preferably, the cooling water channels in the plurality of cooling monomers are connected through hoses, and the hoses are further provided with metal joints.

Preferably, the inert gas is helium, and the inert gas is supplied through a helium tank.

Preferably, the driving means is a cylinder.

Compared with the prior art, the invention has the following technical effects:

the invention achieves the use effects of easy cleaning of the inner wall of the cooling pipe, small demand of using refrigerant gas, small optical fiber jitter and stable temperature of the outlet optical fiber, and realizes the requirements of improving the production efficiency, reducing the production cost and obtaining excellent coating diameter.

Drawings

Fig. 1 is a schematic view illustrating an application of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a partially enlarged view of the junction of fig. 1.

Fig. 4 is a partial enlarged view of the view along C-C of fig. 1.

Reference numerals: 1-positioning a connecting plate; 2-a scaffold; 3-a second connecting rod; 4-a first connecting rod; 5-an interleaving point; 6-movable end; 7-a fiber channel; 8-cooling water channels; 9-sealing strips; 10-boss; 11-a fixed end; 12-a cylinder; 13-cylinder fixing nut; 14-a metal joint; 15-a hose; 16-a sealing gasket; 27-helium flow direction; 29-an air inlet; 30-an optical fiber preform; 31-an optical fiber drawing furnace; 32-high temperature optical fiber.

Detailed Description