CN205099572U

CN205099572U - Optical fiber wire drawing stove furnace construction

Info

Publication number: CN205099572U
Application number: CN201520908081.5U
Authority: CN
Inventors: 张正涛; 傅贤德; 刘文早; 向勇
Original assignee: CHENGDU SEI OPTICAL FIBER Co Ltd
Current assignee: CHENGDU SEI OPTICAL FIBER Co Ltd
Priority date: 2015-11-13
Filing date: 2015-11-13
Publication date: 2016-03-23
Anticipated expiration: 2025-11-13

Abstract

The utility model discloses an optical fiber wire drawing stove furnace construction, including furnace body, the keep warm body, heater, center tube, its characterized in that, the furnace inner wall device the body that keeps warm, the heat preservation annulus sets up base, base center trompil around the periphery at cylindric heater, furnace body bottom to the centre bore and the same axle center of heater of base set up the center tube in the heater, the center tube is placed on the base, and the bottom of center tube is big -end -up's toper, optical fiber perform places the center at the center tube. The utility model discloses with adopting cone combined with's mode to be connected between center tube and the base, need not the position of placing of manual regulation center tube, ensure the position accuracy of center tube for follow the circumferencial direction between center tube and the heater and keep even stable clearance, improve the homogeneity that optical fiber perform was heated, thereby improve wire drawing optic fibre quality, avoid center tube or base the thermal expansion to break, improve life.

Description

A kind of fibre drawing furnace furnace binding

Technical field

The utility model relates to fiber drawing equipment technical field, particularly relates to a kind of fibre drawing furnace furnace binding.

Background technology

Fibre drawing furnace is one of most important equipment in fiber manufacturing operation.Under the control of feeder system, preform is sent in fiber drawing furnace, the termination of preform in fiber drawing furnace more than 2000 DEG C at fusing, viscosity reduces, shrink rapidly under surface tension effects and attenuate, and pull into filament by towing mechanism downwards with suitable speed and tension force, eventually pass cooling, coating and ultra-violet curing explained hereafter and go out optical fiber finished product.

Preform is placed in the pipe core in fibre drawing furnace; the periphery of pipe core is provided with well heater and heats the prefabricated rods be in pipe core; pipe core is heated and can expands; therefore the mounting means of pipe core can not adopt and be rigidly connected; usually can reserve expansion clearance, be subject to base extruding when avoiding pipe core to expand and break.The expansion clearance that pipe core is reserved makes the installation site precision of pipe core be difficult to control, the skew of pipe core position makes pipe core uneven with peripheral well heater gap,, there is the situation of wire drawing bias in the inequality thus the prefabricated rods of inside is heated, has a strong impact on geometrical dimension and the optical property of optical fiber.

Utility model content

The technical assignment of technical problem to be solved in the utility model and proposition improves prior art, a kind of fibre drawing furnace furnace binding is provided, the pipe core solving the traditional fibre drawing furnace furnace binding in current technology is accurate because reserved expansion clearance causes installation site to be difficult to control, thus make the gap of pipe core and well heater uneven, cause preform to be heated inequality, have a strong impact on the problem of wire drawing quality.

For solving above technical problem, the technical solution of the utility model is:

A kind of fibre drawing furnace furnace binding, comprise body of heater, thermal insulator, well heater, pipe core, it is characterized in that, described inboard wall of furnace body installs thermal insulator, thermal insulator is looped around the periphery of cylindric well heater, bottom of furnace body arranges base, central opening of the seal, and the centre hole of base and well heater concentric, in well heater, pipe core is set, pipe core is placed on base, and the taper that the bottom of pipe core is big up and small down, preform is placed on the center of pipe core.

Fibre drawing furnace furnace binding described in the utility model is connected adopting the mode of cone match between pipe core with base, due to the effect of gravity, pipe core can slide down to conical surface diameter and centre hole of base diameter matches along the conical surface bottom it till, this kind of structure can be located automatically, the axle center of pipe core and the axle center of centre hole of base are consistent, thus without the need to manually adjusting the placement location precision of pipe core, reduce labour intensity, improve operation efficiency.When pipe core is in place owing to conducting oneself with dignity, its axle center keeps highly consistent with the axle center of well heater, thus make to keep uniform gap in a circumferential direction between pipe core and well heater, thus the preform being positioned at pipe core inside is heated evenly, ensure the quality of wire drawing optical fiber.And fibre drawing furnace furnace binding described in the utility model is in the process of carrying out wire drawing, pipe core expanded by heating, pyramidal structure size bottom it also can become large, pipe core can along the upwards lifting of the pyramidal structure bottom it, and can not and base between formed and extrude, thus avoid base spalling or pipe core breaks, improve the work-ing life of pipe core and base, and the pyramidal structure bottom pipe core is along it upwards lifting time still keep the concentric state with centre hole of base, thus make along the circumferential direction to keep uniform gap between pipe core and well heater, guarantee that the preform in pipe core is heated evenly all the time, ensure good wire drawing quality.

Further, described base top is in the cone tank mated with pipe core bottom, increase the contact area between pipe core and base, excessive pipe core or the base of causing of by-local forces is avoided to break, the centering of further raising pipe core, and between well heater, keep uniform and stable spacing, preform is heated evenly, improve the work-ing life of pipe core and base, reduce the equipment cost of drawing optical fibers.

Further, the c-shaped structure of cross section of described thermal insulator, thermal insulator wraps the upside of well heater, outside and downside, improves heat-insulating property, avoids heat loss, reduces Wire Drawing cost, improves the homogeneity of in-furnace temperature, improves wire drawing quality.

Compared with prior art, the utility model advantage is:

Fibre drawing furnace furnace binding described in the utility model is connected adopting the mode of cone match between pipe core with base, the centering of effective raising pipe core, without the need to manually adjusting the placement location of pipe core, guarantee the positional precision of pipe core, make along the circumferential direction to keep uniform and stable gap between pipe core and well heater, improve the homogeneity that preform is heated, thus improve wire drawing quality, and when pipe core expanded by heating can not and base between formed and extrude, pipe core or base is effectively avoided to break, improve work-ing life, reduce maintenance cost,

The utility model structure is simple, and equipment is convenient, and time saving and energy saving, good stability, production efficiency is high.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Pipe and base engagement structural representation centered by Fig. 2.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

A kind of fibre drawing furnace furnace binding disclosed in the utility model embodiment, improve the installation site precision of pipe core, easy for installation easy to operate, the well heater of pipe core and its periphery is made to keep uniform gap, thus ensure that preform is heated evenly, improve fibre-optical drawing quality, and pipe core also can not be offset when expanded by heating, remain at stable center position.

As shown in Figure 1 to Figure 2, a kind of fibre drawing furnace furnace binding, comprise body of heater 1, thermal insulator 2, well heater 3, pipe core 4, described body of heater 1 inner wall device thermal insulator 2, and thermal insulator 2 is looped around the periphery of cylindric well heater 3, the c-shaped structure of cross section of thermal insulator 2, thermal insulator 2 wraps the upside of well heater 3, outside and downside, improve heat insulation effect, reduce heat radiation, cut down finished cost; Base 5 is set bottom body of heater 1, base 5 center drilling, and the centre hole of base 5 and well heater 3 concentric, pipe core 4 is set in well heater 3, pipe core 4 is placed on base 5, and the taper that the bottom of pipe core 4 is big up and small down, base 5 top is in the cone tank mated with pipe core 4 bottom, base 5 top is in the cone tank mated with pipe core 4 bottom, and preform 6 is placed on the center of pipe core 4.

The mode of cone match is adopted between pipe core 4 and base 5, pipe core 4 due to gravity along the conical surface automatically under slide to motionless till, the self-centering due to conical surface effect, make the axle center of pipe core 4 and the axis coinciding of base 5, thus guarantee that pipe core 4 is positioned at the center of well heater 3, keep uniform and stable gap between pipe core 4 and well heater 3, preform 6 is heated evenly, improve drawing optical fibers quality.

Below be only preferred implementation of the present utility model, it should be pointed out that above-mentioned preferred implementation should not be considered as restriction of the present utility model, protection domain of the present utility model should be as the criterion with claim limited range.For those skilled in the art, not departing from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. a fibre drawing furnace furnace binding, comprise body of heater (1), thermal insulator (2), well heater (3), pipe core (4), it is characterized in that, described body of heater (1) inner wall device thermal insulator (2), thermal insulator (2) is looped around the periphery of cylindric well heater (3), body of heater (1) bottom arranges base (5), base (5) center drilling, and the centre hole of base (5) and well heater (3) concentric, pipe core (4) is set in well heater (3), pipe core (4) is placed on base (5), and the taper that the bottom of pipe core (4) is big up and small down, base (5) top is in the cone tank mated with pipe core (4) bottom, preform (6) is placed on the center of pipe core (4).

2. fibre drawing furnace furnace binding according to claim 1, is characterized in that, described base (5) top is in the cone tank mated with pipe core (4) bottom.

3. fibre drawing furnace furnace binding according to claim 1, is characterized in that, the c-shaped structure of cross section of described thermal insulator (2), and thermal insulator (2) wraps the upside of well heater (3), outside and downside.