CN214244212U

CN214244212U - Modularization optic fibre is put excellent degasification stove in advance

Info

Publication number: CN214244212U
Application number: CN202023021669.9U
Authority: CN
Inventors: 黄登峰; 黄可昕
Original assignee: Wuhan Yikong Automation Technology Co ltd
Current assignee: Wuhan Yikong Automation Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-09-21
Anticipated expiration: 2030-12-15

Abstract

The utility model relates to a modular optical fiber preset rod degassing furnace, which comprises at least three furnace bodies which are sequentially arranged along a straight line in a clinging manner; the furnace bodies comprise furnace shells, furnace linings, hearths and heating elements; the heating element is arranged on the inner wall of the hearth; the furnace lining is sleeved on the hearth; the furnace shell is sleeved on the furnace lining, two ends of the furnace shell are respectively provided with a baffle plate extending inwards, and the baffle plates are tightly attached to the furnace lining and the end surface of the hearth to fix the furnace body; the utility model can form an ultra-long constant temperature area by combining a plurality of furnace bodies, and carry out multi-section heating on the optical fiber presetting rod; and the utility model discloses can select the furnace body of corresponding quantity to make up the constant temperature district that forms different length according to required constant temperature district length, extensive applicability.

Description

Modularization optic fibre is put excellent degasification stove in advance

Technical Field

The utility model relates to a degasification furnace's technical field especially relates to a stick degasification furnace is preset to modularization optic fibre.

Background

Since the utility model of quartz fiber is applied to the communication field in a large quantity, the market demand is increased year by year, the whole optical fiber market reaches billion scale at present, each manufacturer also continuously expands the production, and continuously pursues lower production cost and higher product quality.

The main production links in the production process of the optical fiber pre-arranged rod are core rod production and outer cladding layer production, which both comprise SiO₂The deposited dust is then sintered into glass, and during the sintering process, a certain amount of gas, such as helium, nitrogen, chlorine, etc., remains in the glass body, and a large amount of internal stress remains. The existence of residual gas and internal stress can seriously affect the drawing quality of the optical fiber, including increasing the fiber breakage probability in the optical fiber drawing process, reducing the strength of the optical fiber, increasing the attenuation value of the optical fiber and the like, and the problems can be well solved by degassing and annealing the core rod and the optical fiber preset rod.

Theoretically, the annealing of the optical fiber pre-arranged rod can be finished for several hours at about 1100 ℃, and gas molecules in the glass body can be diffused to the surface through thermal motion; internal SiO₂The atomic structure of (a) is also rearranged by thermal motion at high temperature, thereby releasing internal stress.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem who exists among the prior art, provide a stick degasification stove is preset to modularization optic fibre, can form overlength thermostatic zone, carry out the multistage heating to the optic fibre stick of presetting.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a degassing furnace for a modular optical fiber preset rod comprises at least three furnace bodies which are sequentially and closely arranged along a straight line; the furnace bodies comprise furnace shells, furnace linings, hearths and heating elements; the heating element is arranged on the inner wall of the hearth; the furnace lining is sleeved on the hearth; the furnace shell is sleeved on the furnace lining, baffle plates extending inwards are arranged at two ends of the furnace shell, and the baffle plates are tightly attached to the end surfaces of the furnace lining and the hearth to fix the furnace body.

The utility model has the advantages as follows:

(1) an ultra-long constant temperature area can be formed by combining a plurality of furnace bodies, and the optical fiber pre-arranged rod is heated in multiple sections;

(2) the furnace bodies with corresponding number can be selected to be combined to form constant temperature areas with different lengths according to the required length of the constant temperature areas, and the applicability is wide.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, both ends of the furnace shell are provided with flange plates extending outwards; two adjacent furnace bodies are connected through flange plate bolts.

Further, the edge department all is equipped with the boss in the both ends face of furnace, the top of boss with the flange board the surface parallel and level of baffle.

The beneficial effect of adopting the further scheme is that: through setting up the boss, can guarantee that furnace hugs closely when two adjacent furnace bodies pass through the flange board and connect for the heating is continuous.

Furthermore, a clamping block is arranged at the inner edge of one end face of the hearth, and a clamping groove matched with the clamping block is arranged at the inner edge of the other end face of the hearth.

The beneficial effect of adopting the further scheme is that: the strength of the degassing furnace is further improved through the matching of clamping blocks and clamping grooves between adjacent furnace bodies.

Furthermore, the hearth is made of 1600-type crystal fibers, and the furnace lining is made of 1400-type ceramic fibers.

Further, the hearth and the furnace lining are compounded to form an integral structure.

Further, the heating element is a high-temperature resistance wire; the high-temperature resistance wires are processed into spiral structures and are uniformly distributed on the inner layer of the hearth.

Furthermore, the high-temperature resistance wires are led out from the outer wall of the furnace shell through three groups of lead-out wires, and the positions of the three groups of lead-out wires are equidistantly and circumferentially distributed on the outer wall of the furnace shell.

The beneficial effect of adopting the further scheme is that: the high-temperature resistance wire heating device is safe and reliable, avoids electromagnetic interference, prolongs the service life of the high-temperature resistance wire, can enhance the heating balance, ensures the uniform temperature in the furnace chamber, and improves the quality of the produced products.

Further, the degassing furnace also comprises two heat preservation furnace mouths which are respectively arranged at two ends of the degassing furnace, and the heat preservation furnace mouths are respectively tightly attached to the furnace bodies at the two ends.

Furthermore, the heat preservation furnace mouth is made of 1600 type crystal fiber.

Drawings

Fig. 1 is a schematic structural view of a degassing furnace for a modular optical fiber pre-setting rod of the present invention;

fig. 2 is a schematic structural diagram of a furnace body of the modular optical fiber pre-setting rod degassing furnace of the present invention;

fig. 3 is a schematic cross-sectional view of the furnace body of the modular optical fiber pre-setting rod degassing furnace of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the furnace comprises a furnace body 11, a furnace shell 111, a baffle plate 112, a flange plate 12, a furnace lining 13, a hearth 131, a boss 132, a clamping block 133, a clamping groove 14, a high-temperature resistance wire 15, a lead-out wire 2 and a heat-preserving furnace mouth.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, a degassing furnace for a modular optical fiber preform comprises at least three furnace bodies 1 and two heat preservation furnace mouths 2 arranged at two ends. The furnace bodies 1 are sequentially and closely mounted along the same axial lead, and the two heat-preserving furnace mouths 2 are respectively and closely attached to the two furnace bodies 1 at the two ends, so that the heat-preserving effect is achieved for the two ends of the degassing furnace. The heat preservation furnace mouth 2 is formed by adopting 1600 type crystal fiber in a customized way, and has good heat preservation effect and light weight. The heat preservation thickness of the heat preservation furnace mouth 2 can be selected to be 120 mm.

The furnace body 1 is used for heating the inside of the degassing furnace, and a constant temperature area is formed inside the furnace body 1 at the middle position except for the two furnace bodies 1 at the two ends. For example, the degassing furnace shown in FIG. 1 comprises five furnace bodies 1, each furnace body is 270mm high, and constant temperature zones with the length of 1350mm are formed inside the three furnace bodies 1 in the middle. When the degassing furnace comprises twelve furnace bodies 1, constant temperature areas are formed inside the middle ten furnace bodies 1, the length of each constant temperature area can reach 2700mm, and an overlong constant temperature area is formed.

As shown in fig. 2, each furnace body 1 includes a furnace shell 11, a furnace lining 12, a furnace chamber 13, and heating means. A furnace lining 12 is sleeved on the hearth 13, and a furnace shell 11 is sleeved on the furnace lining 12. Both ends of the furnace shell 11 are provided with inward extending baffles 111, and the baffles 111 are tightly attached to both end surfaces of the furnace lining 12 and the hearth 13 for fixing the furnace body 1. Both ends of the furnace shell 11 are provided with flange plates 112 extending outwards, the flange plates 112 are provided with through holes arranged circumferentially at equal intervals, and two adjacent furnace bodies 1 are connected through the flange plates 112 by bolts. The baffle 111 and the flange plate 112 at the same end of the furnace shell 11 can be made of 5mm304 stainless steel and are welded with the furnace shell 11. The furnace shell 11 can be made of 3mm304 stainless steel.

The hearth 13 can be made of 1600-type crystal fiber and the furnace lining 12 can be made of 1400-type ceramic fiber. The hearth 13 and the furnace lining 12 are compounded to form an integral structure, and the thickness of the furnace lining 12 can be selected to be 50 mm. The composite structure of the whole hearth 13 and the furnace lining 12 has good heat insulation performance, can resist rapid heating and rapid cooling, does not need to consider the influence of thermal stress, saves energy, has high strength and is not easy to deform.

Bosses 131 are arranged at the inner edges of the two end surfaces of the hearth 13, and the tops of the bosses 131 are flush with the outer surfaces of the baffle 111 and the flange plate 112. After two adjacent furnace bodies 1 are connected through the flange plate 112 by bolts, the hearths 13 of the two adjacent furnace bodies 1 can be tightly attached without leaving gaps, so that the heat insulation performance is improved, and the heating is continuous. The inner edge of the boss 131 on one side of the hearth 13 is provided with a clamping table 132, the inner edge of the boss 131 on the other side is provided with a clamping groove 133, and the clamping groove 133 is matched with the clamping table 132. The furnace chambers 13 of two adjacent furnace bodies 1 are connected with the clamping table 132 through the clamping groove 133 in a matching manner, so that the adjacent furnace bodies 1 are connected more tightly, and the strength of the degassing furnace is further improved.

In this embodiment, the heating device is a high temperature resistance wire 14, and the high temperature resistance wire 14 is processed into a spiral structure and uniformly distributed in the inner layer crystal fiber of the hearth 13. Three groups of high-temperature resistance wires 14 are arranged in each hearth 13, the rated voltage of each group of high-temperature resistance wires 14 is 220v, and the rated power is 4KW, so that the heating power of each hearth 13 is 12 KW. The high-temperature resistance wire 14 has low surface load, large heat productivity, long service life, high temperature resistance and difficult deformation.

The resistance wire leading-out device is also one of the main parts of the electric furnace, and if the resistance wire leading-out device is not processed well, the service life of the high-temperature resistance wire 14 is influenced. As shown in fig. 3, the high temperature resistance wire 14 is respectively led out from the outer wall of the furnace shell 11 by three groups of leading-out wires 15, and the three groups of leading-out wires 15 are distributed on the outer wall of the furnace shell 11 at equal intervals and circles, and the angle between every two groups of leading-out wires 15 is 120 degrees, so that the electromagnetic interference is avoided, the service life of the high temperature resistance wire 14 is prolonged, the heating balance can be enhanced, the temperature in the furnace cavity is ensured to be uniform, and the quality of the produced products is improved. The lead-out wire 15 is led out by adopting a stainless steel screw and a high-temperature junction edge ceramic pagoda connection wire, the structure is safe and reliable, and the service life of the high-temperature resistance wire 14 can be further prolonged.

The utility model discloses a degasification stove adopts the module segmentation combination, only needs to change the module of damage when breaking down, can reduce and use cost gold and equipment maintenance cost. And the utility model discloses a degasification stove can form overlength thermostatic zone through the combination of a plurality of furnace bodies 1, carries out the multistage heating to the optical fiber presetting stick to can select corresponding quantity's furnace body 1 to make up the thermostatic zone that forms different length, extensive applicability according to required thermostatic zone length. Each furnace body 1 can also select different temperatures to heat different positions of the optical fiber presetting rod at different temperatures.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A degassing furnace for a modular optical fiber preset rod is characterized by comprising at least three furnace bodies which are sequentially and closely arranged along a straight line; the furnace bodies comprise furnace shells, furnace linings, hearths and heating elements; the heating element is arranged on the inner wall of the hearth; the furnace lining is sleeved on the hearth; the furnace shell is sleeved on the furnace lining, baffle plates extending inwards are arranged at two ends of the furnace shell, and the baffle plates are tightly attached to the end surfaces of the furnace lining and the hearth to fix the furnace body.

2. A modular fiber pre-rod degassing furnace according to claim 1, wherein both ends of the furnace housing are provided with outwardly extending flange plates; two adjacent furnace bodies are connected through flange plate bolts.

3. A degassing furnace for modular optical fiber preform rods according to claim 2, characterized in that bosses are provided at the inner edges of both end faces of the furnace chamber, and the tops of the bosses are flush with the outer surfaces of the flange plate and the baffle plate.

4. A degassing furnace for modular optical fiber preform rods according to claim 1, wherein a clamping block is arranged at the inner edge of one end face of the furnace chamber, and a clamping groove matched with the clamping block is arranged at the inner edge of the other end face of the furnace chamber.

5. A modular fiber preform degassing furnace as claimed in claim 1 wherein said furnace hearth is made of type 1600 crystal fiber and said furnace lining is made of type 1400 ceramic fiber.

6. The modular fiber pre-cast rod degassing furnace of claim 5, wherein the furnace hearth and the furnace lining are composited to form a unitary structure.

7. A modular optical fiber pre-rod degasser as claimed in claim 1, wherein the heating element is a high temperature resistance wire; the high-temperature resistance wires are processed into spiral structures and are uniformly distributed on the inner layer of the hearth.

8. The degassing furnace according to claim 7, wherein the high temperature resistance wire is led out from the outer wall of the furnace shell through three groups of lead-out wires, and the positions of the three groups of lead-out wires are distributed at equal intervals and circumferentially on the outer wall of the furnace shell.

9. The degassing furnace for the modular optical fiber preform rods of claim 1, further comprising two heat-preserving furnace mouths respectively arranged at two ends of the degassing furnace, wherein the heat-preserving furnace mouths are respectively attached to the furnace bodies at the two ends.

10. The degassing furnace according to claim 9, wherein the holding furnace mouth is made of 1600 type crystal fiber.