CN209522763U - A kind of optical fiber prefabricating stick cladding sintering furnace - Google Patents

Abstract

The utility model discloses a kind of optical fiber prefabricating stick cladding sintering furnaces, including furnace body, and the boiler tube in furnace body and for placing preform is set, the periphery of the boiler tube is provided with the heating zone for furnace tubing internal temperature, the lower end of the boiler tube is movably set with the sealing mechanism for Sealing furnace tube bottom face, and the sealing mechanism includes lifting assembly, is mounted on lifting assembly and mutually chimeric with boiler tube bottom end holds burning platform.The optical fiber prefabricating stick cladding sintering furnace is conveniently cleared up the residue inside boiler tube, using burning platform is held as the mobile base of boiler tube so as to the longer preform for using longer boiler tube to produce；Good heat insulating can effectively improve the efficiency of sintering after guaranteeing heating effect and heat insulation effect.

Description

A kind of optical fiber prefabricating stick cladding sintering furnace

Technical field

The utility model relates to sintering furnace technical fields, and in particular to a kind of optical fiber prefabricating stick cladding sintering furnace.

Background technique

Optical fiber prefabricating stick cladding sintering furnace is mainly used for the high-sintering process of optical fiber prefabricating stick cladding.Preform master To be applied to optical communication field, be the raw material for manufacturing optical fiber cable, be a kind of new material of high added value high technology content. With the large-scale application of development especially 4G, 5G of optical communication technique, China increases sharply to the demand of optical fiber cable, at present I State has been the maximum optical fiber cable producing country in the whole world and has used state, and as the 5G epoch arrive, this demand will sustainable growth. And preform is the raw material of drawing optical fiber, the optical fiber prefabricating stick cladding agglomerating plant in industry is all true with import at present Based on empty sintering furnace.Preform sintering is very high to temperature uniformity and heating coherence request, and existing agglomerating plant needs It carries out under vacuum conditions, every one plug of sintering needs first to vacuumize furnace chamber, and then heat up sintering again, also needs in sintering process The protective atmospheres such as nitrogen are passed through, optical fiber prefabricating stick cladding is sintered.

Current domestic sintering furnace can only produce the preform (general length is within 500mm) of small size, because compared with Long preform needs longer boiler tube, but the later period in this way is difficult to clear up to the residue in boiler tube.

Utility model content

The purpose of this utility model is to provide a kind of optical fiber prefabricating stick cladding sintering furnaces, solve in longer boiler tube Residue is difficult to the problem cleared up, so as to use longer boiler tube production long optical fibers prefabricated rods.

To achieve the above object, the utility model provides the following technical solutions: a kind of optical fiber prefabricating stick cladding sintering furnace, packet Furnace body is included, and the boiler tube in furnace body and for placing preform is set, the periphery of the boiler tube is provided with for adding The heating zone of hot stove pipe internal temperature, the lower end of the boiler tube are movably set with the sealing mechanism for Sealing furnace tube bottom face, institute Sealing mechanism is stated to include lifting assembly, be mounted on lifting assembly and mutually chimeric with boiler tube bottom end hold burning platform.

Preferably, the lifting assembly includes holding the drive lead screw for burning platform for installing, and be connected with drive lead screw And driving holds and burns the motor that platform moves on drive lead screw.

Preferably, the heating zone is separated into multistage by horizontally disposed multiple partitions, and every section is wrapped in boiler tube The insulating layer of periphery, the heating rod and temperature sensor being arranged in insulating layer.

Preferably, the material of the insulating layer is alumina fibre cotton.

Preferably, described hold burns platform and close to boiler tube bottom is provided with cellucotton on one side.

As shown from the above technical solution, the utility model has the following beneficial effects:

The lower end that boiler tube is arranged in the optical fiber prefabricating stick cladding sintering furnace is non-tight structure, and the lower end of lower heat preservation zone is connected with For the sealing mechanism at Sealing furnace tube bottom end, the sealing mechanism include lifting assembly, be mounted on lifting assembly and with boiler tube bottom What end was mutually fitted into holds burning platform, burns platform as the mobile base of boiler tube using holding, conveniently clears up the residue inside boiler tube, from And the longer preform of longer boiler tube production can be used；Heating zone is arranged to separate by horizontally disposed multiple partitions At multistage, every section of heating rod and temperature sensor for being wrapped in the insulating layer of boiler tube periphery, being arranged in insulating layer guarantees Heating effect is good, and temperature is uniform, and thermal insulation material is alumina fibre cotton, and good heat insulating is guaranteeing heating effect and guarantor After temp effect, the efficiency of sintering can be effectively improved.

Detailed description of the invention

Fig. 1 is the utility model overall structure diagram.

Fig. 2 is enlarged structure schematic diagram at the utility model A

In figure: 1, furnace body；2, boiler tube；3, heating zone；301, insulating layer；302, heating rod；303, temperature sensor；4, on Heat preservation zone；5, lower heat preservation zone；6, sealing mechanism；610, lifting assembly；611, drive lead screw；612, motor；620, burning platform is held；7, Partition.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

As depicted in figs. 1 and 2, a kind of optical fiber prefabricating stick cladding sintering furnace, including furnace body 1, furnace body coaming plate are welded, with And furnace interior center and the boiler tube 2 for placing preform are set, the upper top surface of boiler tube 2 and bottom surface are Hatch frame, the surrounding of boiler tube 2 are enclosed with the heating zone 3 for furnace tubing internal temperature, and heating zone 3 passes through horizontally disposed Five 7 vertical separations of partition at six sections, every section be wrapped in the thermal insulation material 301 of boiler tube surrounding, level is inserted in thermal insulation material In heating rod 302 and temperature sensor 303, the thermal insulation material in every section along same level is placed equidistant with that there are four heating rods (i.e. four heating rods are equidistantly installed around same section of heating zone) and a temperature sensor, in a ring equidistant arrangement Heating rod, so that Heating Zone Temperature is uniform, wherein heating rod is Si-Mo rod, and temperature sensor is that armouring B indexes thermocouple, for pair Carry out measuring and controlling temp inside boiler tube, the upper end peripheral ring of heating zone 3 is around being connected with upper heat preservation zone 4, the lower end periphery ring of heating zone Around lower heat preservation zone 5 is connected with, the height of heating zone, upper heat preservation zone and lower heat preservation zone vertical summation is equal with the height of boiler tube, protects Warm layer 301, upper heat preservation zone 4 and lower heat preservation zone 5 are all made of thermal insulation material 301, the guarantor in upper heat preservation zone, lower heat preservation zone and insulating layer Adiabator is alumina fibre cotton, and alumina short fibre cotton high temperature resistance with higher, lower heat preservation zone lower end is connected with close Sealing mechanism 6, sealing mechanism is corresponding with the bottom surface of boiler tube, which includes lifting assembly 610, is mounted on lifting assembly Platform 620 is burnt in upper and mutually chimeric with boiler tube bottom end holding, lifting assembly 610 including be vertically mounted on the corresponding two sides in lower heat preservation zone and The drive lead screw 611 for burning platform, and the motor 612 being connected with drive lead screw are held for installing, since the bottom surface of boiler tube is It is mutually chimeric with boiler tube bottom end to hold burning platform for hatch frame, and holds burning platform and be mounted on lifting assembly, can burn to holding by lifting assembly Platform moves up and down on drive lead screw, is sealed to the bottom of boiler tube, so that the convenient residue to inside boiler tube carries out Cleaning, while holding burning platform and being designed to two sublevel structures, and from top to bottom, two layers of left and right sides are in step-like (boiler tube bottom end It is scalariform of falling from power that mouth is opened up between lower insulating layer, and it is mutually chimeric to burn platform with step-like holding), it can guarantee sealing effect, prevent Heat loss in boiler tube holds burning platform 620 close to boiler tube bottom and is provided with cellucotton on one side, plays support and protection to boiler tube Effect.

Further include the elevating mechanism 8 for being connected and being arranged in heating rod one end with heating zone periphery, every section of heating zone with Elevating mechanism is connected, i.e., each heating zone can be promoted, and maximum lift spacing is 600mm, when one of heating zone needs more When changing heating rod, fixes after 600mm is improved on the top in the area by hoisting way step by step, then takes out the stick needed to change, New stick is loaded onto, then step by step falls heating zone, changes stick conveniently, safety and reliability is high, and each heating zone connecting place spreads high temperature Cellucotton reduces heat dissipation, improves the service life of burner hearth.

Working principle: first motor 612 drive drive lead screw 611 on holding burn platform 620 move up, until hold burn platform with Boiler tube bottom end is completely fitted, and carries out back cover to boiler tube, then puts into optical fiber prefabricating stick cladding from the upper end of boiler tube 2, boiler tube Upper top surface is sealed using upper cover plate, accesses power supply, and heating rod 302 is heated.Since heating rod is to be fixed on package furnace In the thermal insulation material 301 of pipe surrounding, therefore after heating rod heating, temperature insulation material is kept the temperature and is transmitted to boiler tube Interior, thermal insulation material selects alumina fibre, good heat insulating, and four heating rods installed around same section of heating zone heat, Heating rod selects Si-Mo rod, and heating effect is good, under the premise of heating and thermal insulation property improve, so that the predispersed fiber in boiler tube Rod cladding sintering efficiency processed improves, while temperature sensor 303 will sense that temperature data is transferred to furnace body outer end in heating zone 3 Control equipment on, controlled convenient for the temperature to heating zone, the optical fiber prefabricating stick cladding in boiler tube be sintered, burning is worked as After knot, motor 612 drives holding on drive lead screw 611 to burn platform 620 and moves down, and holds and burns platform and the disengaging of boiler tube bottom end, clearly The residue of reason can be discharged by the bottom of boiler tube, facilitate clear up the residue inside longer boiler tube at this time.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of optical fiber prefabricating stick cladding sintering furnace, including furnace body (1), and be arranged in furnace body and be used to place optical fiber prefabricating The boiler tube (2) of stick, the periphery of the boiler tube (2) are provided with the heating zone (3) for furnace tubing internal temperature, and feature exists In the lower end of the boiler tube (2) is movably set with the sealing mechanism (6) for Sealing furnace tube bottom face, sealing mechanism (6) packet Lifting assembly (610) is included, is mounted on lifting assembly and platform (620) are burnt in hold mutually chimeric with boiler tube bottom end.

2. a kind of optical fiber prefabricating stick cladding sintering furnace according to claim 1, it is characterised in that: the lifting assembly (610) include for install hold burn platform drive lead screw (611), and be connected with drive lead screw and drive hold burning platform be driven The motor (612) moved on screw rod.

3. a kind of optical fiber prefabricating stick cladding sintering furnace according to claim 1, it is characterised in that: the heating zone (3) is logical Cross horizontally disposed multiple partitions and be separated into multistage, every section be wrapped in the insulating layer (301) of boiler tube periphery, setting is being kept the temperature Heating rod (302) and temperature sensor (303) in layer.

4. a kind of optical fiber prefabricating stick cladding sintering furnace according to claim 3, it is characterised in that: the insulating layer (301) Material be alumina fibre cotton.

5. a kind of optical fiber prefabricating stick cladding sintering furnace according to claim 1, it is characterised in that: described hold burns platform (620) It is provided with cellucotton on one side close to boiler tube bottom.