CN214327557U

CN214327557U - Doping solution spraying device

Info

Publication number: CN214327557U
Application number: CN202022624292.XU
Authority: CN
Inventors: 潘蓉; 庞璐; 武洋; 衣永青; 沈一泽; 韩志辉
Original assignee: CETC 46 Research Institute
Current assignee: CETC 46 Research Institute
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-10-01
Anticipated expiration: 2030-11-13

Abstract

The utility model provides a doping solution sprinkler, including the solution memory, a pipe, the sprinkler, the stereoplasm hollow tube, quartz reaction tube, electric lift platform, the guide rail, a speed sensor, take pressure regulating valve's nitrogen gas conveyer pipe and supporting seat, the solution accumulator is connected to the one end of hollow tube, solution sprinkler is connected to the other end, this solution accumulator carries out pressure control to solution, at the uniform velocity transport solution, the feeding speed is controlled through control transport nitrogen gas, ionic solution flows through stereoplasm hollow tube 4, get into the sprinkler blowout, receive speed sensor in real time and obtain the positional information of sprinkler through calculating, spray ionic solution to quartz reaction tube many times through electric lift platform reciprocating motion. The ion solution doping device has the advantages of simple structure, convenience in operation and strong controllability, and can be used for doping ion solutions of various types and different concentrations. The optical fiber qualification rate and the optical fiber loss are improved, the beam quality of the optical fiber laser is improved, and the use requirements of various aspects are met.

Description

Doping solution spraying device

The technical field is as follows:

the utility model relates to an optical fiber perform preparation facilities especially relates to a dope solution sprinkler.

Background

With the development of laser technology, lasers are more and more widely applied in military and civil affairs, and meanwhile, the requirements on the lasers are higher and higher, and the requirements on the lasers are high, high quality, high power and high efficiency, which are important standards for judging the advantages and the disadvantages of the lasers. In recent years, the laser fiber laser doped with rare earth ions has received attention gradually because of its advantages of good beam quality, small volume, fast speed, long working life, etc. And has been widely used in the laser welding field, the medical field, the laser communication and other fields.

The core part of the laser fiber laser is the rare earth ion doped fiber, the rare earth ion doped fiber preform is the necessary part for drawing the rare earth ion doped fiber, and the rare earth ion doped process is divided into two major categories, namely a liquid phase doping method and a gas phase doping method. The liquid phase doping method is to soak the loose layer with ion solution to make the ion in the ion solution absorbed by the loose layer so as to achieve the purpose of doping rare earth ions. The liquid phase doping method is prone to the phenomena of uneven doping concentration, separation layer falling and the like, and the solution soaking process flow is complex. The gas phase doping method is to utilize gaseous reactant to produce RE ion compound directly in quartz reaction tube for doping. However, since the chelate compound itself contains carbon, carbon deposition is easily generated and the loss of the optical fiber becomes high. And the gas phase doping method requires saturated gaseous reactants, and a slight decrease in temperature causes the gaseous reactants to condense into a solid state, not to participate in the reaction, and to easily block the pipeline.

Disclosure of Invention

In view of the problems existing in the prior art, the utility model provides a doping solution sprinkler. By adopting a telescopiform ionic solution spraying mode, the problems of uneven ionic concentration and easy falling of a loose layer are solved, so that the purposes of improving the absorption uniformity of the optical fiber, reducing the loss of the optical fiber, improving the beam quality of the optical fiber laser and prolonging the service life of the optical fiber are achieved. The specific technical scheme is that a plurality of doping solution sprinkler, including solution memory, pipe, sprinkler, stereoplasm hollow tube, quartz reaction tube, electric lift platform, guide rail, speedtransmitter, take pressure regulating valve's nitrogen gas conveyer pipe and supporting seat, its characterized in that: the sprinkler is a nested structure with multiple layers of cylinders with round cavities, the cylinder on the uppermost layer is provided with a vertical pipe which is the same as the number of layers and is matched with the soft guide pipes of the guide pipes, each layer of cylinder is provided with an eccentric round through hole, the vertical pipe is respectively communicated with the cylinder on the uppermost layer, the outer side surface of the round cavity of each layer of cylinder comprises at least three radial thin through holes, and the radial thin through holes are uniformly distributed along the circumference, a plurality of solution storages are fixed on the upper end surface of a supporting seat, a nitrogen conveying pipe with a pressure regulating valve is fixed above the liquid level of the plurality of solution storages, the inner diameter of the guide pipe is 17-18mm, the pipe is internally provided with a plurality of hollow soft guide pipes, the plurality of soft guide pipes respectively extend out of two ends of the guide pipes, one ends of the plurality of soft guide pipes are respectively arranged at the bottom of the liquid level of each solution storage, the other ends of the soft guide pipes are respectively connected with the vertical pipe of the sprinkler, and the sprinkler is fixed on the hard hollow pipe, one end of a hard hollow pipe with a sprayer is inserted into the quartz reaction pipe, the other end of the hard hollow pipe is fixed in the guide pipe, the inner diameter of the quartz reaction pipe is 20 mm-25 mm, the quartz reaction pipe consists of an upper end supporting part and a lower end reaction part, the length of the reaction part is 600 +/-10 mm, and the length of the supporting part is 500 +/-10 mm; the sprayer is positioned at the upper end of the supporting part of the quartz reaction tube and is the initial position of the sprayer, the electric lifting table is arranged in the guide rail, the direction of the guide rail is fixed in the same direction as that of the quartz reaction tube, the hard hollow tube is fixed on the electric lifting table in an interference fit manner, and the speed sensor is fixed on the electric lifting table.

The outer diameter of the sprayer is 20-21mm, and the length of the sprayer is 25-30 mm; the inner diameter of the round cavity is 18-19mm, and the height is 10-11 mm.

The inner diameter of the reaction part of the quartz reaction tube is 20 mm-25 mm, and the bending degree of the support part of the quartz reaction tube after the loose layer is deposited is small, so that the hard hollow tube and the sprayer can enter the reaction part of the quartz reaction tube.

The utility model has the advantages that the ion solution doping of many varieties, different concentrations can be carried out. The method solves the problem that the concentration of the ionic solution is uneven when the preform is soaked in the traditional method, and further improves the qualification rate of the optical fiber, thereby reducing the loss of the optical fiber and improving the beam quality of the optical fiber laser. And the solution flow rate or the step speed of the sprayer can be controlled so as to control the doping ion concentration of the optical fiber preform, thereby meeting the use requirements of various aspects.

Description of the drawings:

fig. 1 is a schematic structural perspective view of the present invention;

FIG. 2 is a perspective view of the sprinkler structure of the present invention;

fig. 3 is a cross-sectional view of the sprinkler a-a of the present invention.

The specific implementation mode is as follows:

the present invention will be further explained with reference to the drawings and examples.

Example one

The common ytterbium doped optical fiber prefabricated rod is manufactured.

As shown in fig. 1, 2 and 3, the conventional ytterbium-doped optical fiber preform is used. The thickness of the inner wall of the selected quartz reaction tube 6 is about 23mm, the length of the reaction part 6-2 is about 600mm, and the length of the support part 6-1 is about 500 mm. The length of the selected hard hollow pipe 4 is about 1150mm, the outer diameter is about 4.5 mm, the hard hollow pipe can be made of elastic and rigid materials such as fluoroplastic, the inner diameter is about 3.5mm, the outer diameter of the sprinkler 3 is about 20.5mm, the inner diameter is about 19mm, the height is 25mm, the inner diameter of the circular cavity 3-1 is 18mm and 10mm, the side surface of each cavity is provided with six radial thin through holes 3-2 which are uniformly distributed along the circumference, the outer diameter of the conduit 2 is 18.5mm, the length requirement is related to the placement position of an actual instrument, and the hard hollow pipe 4 is required to be free of folding.

The solution storage devices 1 are fixed on the upper end surface of a supporting seat 11, a nitrogen conveying pipe 10 with a pressure regulating valve is fixed above the liquid level of each solution storage device 1, the inner diameter of each guide pipe 2 is 17-18mm, a plurality of pipes with hollow soft guide pipes 2-1 are arranged in each solution storage device, the plurality of soft guide pipes 2-1 extend out of two ends of each guide pipe 2 respectively, one ends of the plurality of soft guide pipes 2-1 are arranged at the bottom of the liquid level of each solution storage device 1 respectively, the other ends of the plurality of soft guide pipes are connected with a vertical pipe 3-3 of each layer of circular cavity 3-1 of the spraying device 3 respectively, the spraying device 3 is fixed on a hard hollow pipe 4, one end of the hard hollow pipe 4 with the spraying device 3 is inserted into a quartz reaction pipe 6, the other end of the hard hollow pipe 4 is fixed in each guide pipe 2, a supporting part 6-1 of the quartz reaction pipe 6 is vertically fixed on a chuck 11-1 on the side end surface of the supporting seat 11, the spraying device 3 is positioned at the upper end of the supporting part 6-1 of the quartz reaction pipe 6, the sprinkler 3 is at the initial position, the electric lifting platform 7 is arranged in the guide rail 8, the direction of the guide rail 8 is fixed in the same direction as that of the quartz reaction tube 6, the hard hollow tube 4 is fixed on the electric lifting platform 7 in an interference fit manner, and the speed sensor 9 is fixed on the electric lifting platform 7.

The spraying steps are as follows:

and (I) adopting a quartz tube as the quartz reaction tube 6 for deposition, and depositing an isolating layer on the inner wall of the quartz reaction tube 6 for preventing impurity ions in the quartz reaction tube 6 from entering the core layer.

Depositing a loose layer in a reaction part 6-2 of the quartz reaction tube 6 deposited with the isolation layer, wherein the loose layer is an unsintered, opaque and porous deposition layer and is used for adsorbing solute ions in the solution;

thirdly, fixing the supporting part 6-1 of the quartz reaction tube 6 on the chuck 11-1 of the supporting seat 11, inserting one end of a hard hollow tube 4 fixed on the electric lifting platform 7 into the initial position of the sprayer 3 at the uppermost end of the reaction part 6-2 of the quartz reaction tube 6 by connecting the sprayer 3, fixing the other end of the hard hollow tube 4 on the guide tube 2,

and (IV) starting an electric lifting platform 7, driving the sprayer 3 at the lower end of the hard hollow tube 4 to move axially to enter the specified position of the quartz reaction tube 6 by the electric lifting platform 7, controlling the stepping speed to be 3mm/s, simultaneously opening a nitrogen inlet switch, opening a hose pipeline switch in a ytterbium ion solution storage device 1, controlling the flow of the ytterbium ion solution to be 3ml/s, and enabling the ytterbium ion solution to enter the conduit 2 through a bottom extending hose 2-1 and to reach the radial thin through hole 3-2 of the sprayer 3 at the top end for spraying.

(V) when the ytterbium ion solution is sprayed to reach the specified amount, closing a pipeline switch between the ion solution storage and the hose 2-1 of the guide pipe 2, closing the nitrogen inlet pressure valve, stopping spraying the ion solution by the sprayer 3, driving the hard hollow pipe 4 and the sprayer 3 to do reverse axial movement by the electric lifting platform until the sprayer 3 returns to the initial position, and closing the electric lifting platform 7;

(VI) after the ion solution is injected, a little liquid is remained in the hose 2-1 and the sprayer 3, the hose 2-1 and the sprayer 3 are required to be purged, and the cleaning is carried out, so that the pollution or the pipeline blockage is avoided;

and (seventhly), loosening the chuck 11-1 of the supporting seat 11, taking down the quartz reaction tube 6, mounting the quartz reaction tube on a rod making lathe, standing, drying, and finishing the doping of the ionic solution.

Principle of operation

The electric lifting platform 7 is in interference fit with the guide pipe 2, the electric lifting platform 7 is provided with a motor driving device, and the motor driving device drives the electric lifting platform 7 to move up and down on the guide rail 8 along the vertical direction to enter or leave the quartz reaction tube 6. The stopper is formed in the horizontal direction so that the electric lift table 7 does not move in the horizontal direction. Meanwhile, the position information of the sprinkler 3 is obtained by receiving the speed sensor on the electric lifting platform in real time and calculating.

The feeding speed of the ionic solution is controlled by controlling and conveying nitrogen, and the nitrogen solution flows out through the hard hollow pipe 4 and enters the sprayer to be sprayed out due to the fact that the liquid level of the ionic solution is pressed to be low under the action of pressure.

The manufacturing process of the optical fiber preform doped with other rare earth ions and the manufacturing process of the optical fiber preform doped with other kinds of co-doped ions can refer to the above embodiment, and corresponding devices such as an ion solution conveying pipeline, a gas valve, a flowmeter and the like need to be added, and other operations are the same as those in the first embodiment.

Claims

1. The utility model provides a doping solution sprinkler, includes solution memory (1), pipe (2), sprinkler (3), stereoplasm hollow tube (4), quartz reaction tube (6), electric lift platform (7), guide rail (8), speedtransmitter (9), take pressure regulating valve's nitrogen gas conveyer pipe (10) and supporting seat (11), its characterized in that: the sprinkler (3) is a nested structure of a plurality of layers of cylinders with round cavities (3-1), the cylinders on the uppermost layer are provided with vertical pipes (3-3) with the same number of layers and matched with the soft conduits (2-1) of the conduit (2), each layer of cylinders are provided with non-concentric round through holes (3-4) and internally provided with vertical pipes (3-3) which are respectively communicated with the cylinders on the uppermost layer, the outer side surface of each layer of cylinders on the round cavities (3-1) comprises at least three radial thin through holes (3-2) and are uniformly distributed along the circumferential surface, a plurality of solution storages (1) are fixed on the upper end surface of a supporting seat (11), a nitrogen conveying pipe (10) with a pressure regulating valve is fixed above the liquid surface of the plurality of solution storages (1), the inner diameter of the conduit (2) is 17-18mm, and a plurality of tubes with the hollow soft conduits (2-1) are arranged in the conduit, a plurality of soft guide pipes (2-1) respectively extend out of two ends of the guide pipe (2), one ends of the plurality of soft guide pipes (2-1) are respectively arranged at the bottom of the liquid surface of each solution storage device (1), the other ends of the plurality of soft guide pipes are respectively connected with a vertical pipe (3-3) of the sprayer (3), the sprayer (3) is fixed on a hard hollow pipe (4), one end of the hard hollow pipe (4) with the sprayer (3) is inserted into a quartz reaction pipe (6), the other end of the hard hollow pipe is fixed in the guide pipe (2), the inner diameter of the quartz reaction pipe (6) is 20 mm-25 mm and consists of an upper end supporting part (6-1) and a lower end reaction part (6-2), the length of the reaction part (6-2) is 600 +/-10 mm, and the length of the supporting part (6-1) is 500 +/-10 mm; the device is vertically fixed on a chuck (11-1) on the side end face of a supporting seat (11), a sprayer (3) is positioned at the upper end of a supporting part (6-1) of a quartz reaction tube (6) and is the initial position of the sprayer (3), an electric lifting table (7) is arranged in a guide rail (8), the direction of the guide rail (8) is fixed in the same direction as that of the quartz reaction tube (6), a hard hollow tube (4) is fixed on the electric lifting table (7) in an interference fit manner, and a speed sensor (9) is fixed on the electric lifting table (7).

2. A doping solution spraying apparatus as set forth in claim 1, wherein: the outer diameter of the sprayer (3) is 20-21mm, the length is 25-30mm, the inner diameter of the round cavity (3-1) is 18-19mm, and the height is 10-11 mm.

3. A doping solution spraying apparatus as set forth in claim 1, wherein: the inner diameter of the reaction part (6-2) of the quartz reaction tube (6) is 20 mm-25 mm, and the bending degree of the support part (6-1) of the quartz reaction tube (6) after the loose layer is deposited is small, so that the hard hollow tube (4) and the sprayer (3) can enter the reaction part (6-2) of the quartz reaction tube.