CN112337131B - Rare earth luminescent material preparation spraying mechanism and preparation method thereof - Google Patents
Rare earth luminescent material preparation spraying mechanism and preparation method thereof Download PDFInfo
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- CN112337131B CN112337131B CN202011215233.5A CN202011215233A CN112337131B CN 112337131 B CN112337131 B CN 112337131B CN 202011215233 A CN202011215233 A CN 202011215233A CN 112337131 B CN112337131 B CN 112337131B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7784—Chalcogenides
- C09K11/7787—Oxides
Abstract
The invention provides a rare earth luminescent material preparation spraying mechanism and a preparation method thereof, wherein the rare earth luminescent material preparation spraying mechanism comprises an installation frame, a rotary spraying device which penetrates through the center of the installation frame, a grading liquid conveying system which is sleeved on the rotary spraying device, and a nozzle which is fixedly connected below the rotary spraying device; a wall flow prevention device is further arranged below the mounting rack; the wall flow prevention device is positioned below the rotary spraying device. The nozzle on the rotation gear rotates along the center of the central wheel at the same speed and rotates along the center of the rotation gear, so that the requirement of uniformly spraying various rare earth and oxalic acid feed liquids is met, and the crystallization effect is good. The spraying mechanism is provided with a grading infusion system, so that the feed liquid at the spraying position can obtain approximately the same water pressure, and the feed liquid is uniformly sprayed.
Description
Technical Field
The invention relates to the field of luminescent material preparation equipment, in particular to a rare earth luminescent material preparation spraying mechanism and a preparation method thereof.
Background
The process of rare earth luminescence is that external energy is transferred to a luminescence center, the luminescence center is excited, and then radiation returns to the ground state to generate fluorescence. The substrate materials commonly used at present generally comprise fluoride, sulfide, oxide and the like. Fluoride phonon energy is the lowest, but easy pyrolysis, chemical temperature nature is relatively poor, and sulfur element of sulphide can cause the volatilization of sulfur element because of current excitation in the application, causes great damage to the nature, and the characteristics of oxide are that chemistry and physical stability are high, and the structure is firm. A frequently used oxide is y2O3、Eu2O3 、Tb4O7Three oxides to obtain y + Eu + Tb luminescent product.
The synthesis of y + Eu + Tb luminescent material products has multiple methods, and the difference of synthesis means can bring about the difference of crystal field environment, thereby influencing the different luminous efficiency and even influencing the luminous wavelength. The high-temperature solid-phase reaction method is a more classical synthesis method in the prior art, and the process flow is as follows: raw material weighing-thorough mixing-heating combustion under certain atmosphere conditions-cooling-screening-sample. The material synthesized by the method has strong physical and chemical stability, high brightness, good microcrystalline crystal quality and small surface defect, and is beneficial to industrial production. However, in the mixing process, the method has high requirements on whether the mixing is uniform or not, because the feed liquid and the oxide are easy to form agglomeration in the synthesis process, the glossiness of the microcrystal is reduced, diffuse reflection and defects are increased, and the obtained particle size is also nonuniform.
The liquid spraying device is used for uniformly spraying liquid on the filler in the mixing container, so that the surface of the filler can be wetted. The spraying device in the prior art has the defects of uneven liquid distribution, unequal concentration when the liquid is crystallized instantly, and uneven mixing caused by the phenomenon of wall flow increased by spraying the liquid onto the wall of the mixing container.
Disclosure of Invention
The invention aims to provide a spraying mechanism which can uniformly spray feed liquid on oxide in a stirring tank in a mixing procedure in the preparation process of a luminescent material so as to solve the problem of non-uniform spraying in the background technology;
in order to achieve the purpose, the technical scheme provided by the invention is as follows: a rare earth luminescent material preparation spraying mechanism and a preparation method thereof comprise a mounting rack, a rotary spraying device which penetrates through the center of the mounting rack, a grading infusion system which is sleeved on the rotary spraying device, and a nozzle which is fixedly connected below the rotary spraying device;
a wall flow prevention device is further arranged below the mounting rack;
the wall flow prevention device is positioned below the rotary spraying device.
Further:
the mounting rack is a shell with an opening at the lower end;
the spraying device comprises a motor fixing plate fixedly connected to the upper end of the mounting frame, a motor fixedly connected to the upper end face of the motor fixing plate, a transmission shaft with one end fixedly connected to an output shaft of the motor, a central wheel fixedly sleeved on the transmission shaft, a self-rotating gear in meshing transmission with the central wheel and an outer gear fixedly connected to the opening end of the mounting frame;
the external gear is sleeved on the central gear and the self-rotating gear;
the self-rotating gear is meshed with the central gear and is also meshed with the external gear for transmission;
the module and the tooth number of the self-rotating gear are the same as those of the central gear;
the transmission shaft is fixedly connected with a self-rotating gear mounting rack;
the rotation gear is rotatably connected with the rotation gear mounting rack;
the number of the self-rotating gears is more than one;
the transmission shaft penetrates through the upper end face of the mounting rack;
the wall flow prevention device is arranged on the lower end face of the outer gear.
Further:
the graded infusion system comprises a primary delivery pipe, a water inlet pipe and a secondary delivery pipe, wherein the primary delivery pipe is rotatably sleeved on the transmission shaft, the water inlet pipe is communicated with the upper end of the primary delivery pipe, and the secondary delivery pipe is communicated with the lower end of the primary delivery pipe;
the autorotation gear mounting rack is a circular tube;
the secondary conveying pipe is fixedly sleeved on the outer circumferential surface of the self-rotating gear mounting rack;
a first annular inner cavity A is formed in the rotation gear;
the secondary conveying pipe is communicated with the inner cavity A;
a second annular inner cavity B is arranged in the central wheel;
the graded infusion system further comprises a secondary tube communicating the second annular lumen B with the secondary delivery tube;
the first annular inner cavity A is communicated with the nozzle;
the second annular inner cavity B is communicated with the nozzle.
Further:
the nozzles comprise a first nozzle and a second nozzle;
the first nozzles are uniformly distributed on the first annular inner cavity A in the circumferential direction;
the second nozzles are uniformly distributed on the second annular inner cavity B in the circumferential direction.
Further:
the wall flow prevention device comprises a sliding rail fixedly connected to the inner side surface of the mounting frame, a sliding block connected to the sliding rail in a sliding mode and a shielding plate fixedly connected to the sliding block;
the shielding plate is a circular annular pipe;
the lower end of the shielding plate is provided with a U-shaped groove;
and a through long groove matched with the sliding block is arranged in the height direction of the sliding rail.
Further:
the wall flow prevention device is also provided with an adjusting handle fixedly connected with the sliding block;
the side wall of the mounting rack is provided with two symmetrical long grooves parallel to the axis direction;
the adjusting handle moves up and down along the long groove of the mounting rack;
the adjusting handle is a circular truncated cone with a thread at one end;
the threaded end of the adjusting handle is in threaded connection with a locking nut.
Further:
the nozzle comprises a spraying body, an upper cover body fixedly connected to an outlet at the lower end of the spraying body and a lower cover body buckled below the upper cover body;
the lower cover body is in a funnel shape which is opened upwards;
the upper cover body is in a funnel shape which is opened downwards;
the upper cover body and the lower cover body are symmetrically arranged to form an inner cavity;
and the lower cover body is provided with a water spraying hole.
Further:
the second annular cavities B are uniformly distributed along the circumference of the central wheel (24).
Further:
a method for preparing rare earth luminescent material by a rare earth luminescent material preparation spraying mechanism comprises the following steps,
putting the oxide in a two-layer storage tank, and acidifying the oxide into rare earth feed liquid by using refined HCl, wherein the molar ratio of the oxide to hydrochloric acid is 1:1.2-1.4, and the hydrochloric acid is concentrated hydrochloric acid with the mass fraction of 37%;
secondly, pure water is put into a cubic plastic storage tank or a ceramic storage tank as bottom water, and the temperature is raised to 65 ℃;
a second layer is also provided with a stirring tank, the second layer of stirring tank is filled with oxalic acid diluent of oxalic acid prepared by pure water, and the mass ratio of oxalic acid to pure water in the oxalic acid diluent is 1: 10;
fixing the mounting rack 1 above the cubic stirring tank of one layer, connecting the output end of the stirring tank filled with oxalic acid diluent into the rotary spraying device 2, starting the rotary spraying device 2, uniformly spraying the feed liquid into the cubic stirring tank from the nozzle 4, then closing the output end of the oxalic acid diluent, connecting the output end of the acidified rare earth feed liquid into the rotary spraying device 2, starting the rotary spraying device 2 again, remixing the rare earth feed liquid and the oxalic acid diluent in a mode of spraying while stirring, then precipitating into white feed liquid, putting into a spin dryer for spin-drying, putting into a ceramic bowl, feeding into an electric kiln, heating to 950 ℃, firing for 4 hours, seeing the pink strip column powder in the bowl, namely: y + Eu + Tb luminescent material product.
Further:
the oxides include the following compounds: y is2O3 96.0％±0.005％， Eu2O3 4.0％± 0.002％，Tb4O7 0.003± 0.0003％；
The rare earth feed liquid: pure water: the mass ratio of the oxalic acid diluent is 1: 1.2.
compared with the prior art, the invention has the beneficial effects that:
1. the spraying mechanism adopts a motor as energy power to drive a central wheel to rotate, then the central wheel drives an autorotation gear meshed with the central wheel to rotate, as an external gear is meshed with the autorotation gear, the autorotation gear revolves around the axis of the central wheel besides autorotation, nozzles arranged on the rotating central wheel and the autorotation gear can move at a uniform speed along the axis of the spraying mechanism, so that the nozzles on the central wheel move at a uniform speed, the nozzles on the autorotation gear rotate at the same speed along the center of the central wheel and rotate along the center of the autorotation gear, the requirement of uniformly spraying various rare earth feed liquids and oxalic acid diluent is met, and the crystallization effect is good.
2. This spray mechanism is provided with hierarchical infusion system, and the feed liquid gets into the one-level conveyer pipe through the inlet tube, is shunted each second grade conveyer pipe with the feed liquid by the distribution notch in the one-level conveyer pipe again, and each nozzle department is shunted to the rethread second grade conveyer pipe for the feed liquid that sprays the department can obtain the same water pressure of approximation, thereby guarantees that the feed liquid evenly sprays.
3. This spray mechanism has set up and has prevented the wall flow device, because the pressure of shower nozzle or the spray angle of nozzle are big, can lead to a certain amount of feed liquid to spray the agitator tank lateral wall, and flow into in the agitator tank along the lateral wall, can so make near lateral wall feed liquid concentration many, can't accomplish the misce bene, and the agitating unit in many agitator tanks also can't be with the complete misce bene of feed liquid along agitator tank circumference inner wall, so can also lead to the crystal that final stirring finishes not to reach the requirement, so increase and prevent the wall flow device, reduce the production of unqualified crystal, the effect that luminescent material mixes has been improved.
4. This spray mechanism adopts manual regulation mode, can adjust from top to bottom preventing the wall flow device to adapt to the difference of different pressure or different nozzle spray range, adjust the occasion of arrangement, increased flexibility and the suitability that uses.
5. This spray mechanism easy operation withholds the mounting bracket on the agitator tank to fasten, do not need the manual work to monitor the operation, the installation is dismantled simply, and the feed liquid import can be directly communicate convenient and fast with higher level's feed liquid jar.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a bottom view of the present invention;
FIG. 3 is a schematic cross-sectional view of a rotary sprayer according to the present invention;
FIG. 4 is a schematic top view of the rotary sprayer of the present invention;
FIG. 5 is a schematic diagram of the staged infusion system of the present invention;
FIG. 6 is a schematic perspective view of the rotary sprayer of the present invention;
FIG. 7 is a schematic cross-sectional view of the wall flow prevention device of the present invention;
FIG. 8 is a schematic cross-sectional view of the nozzle of the present invention.
Wherein, 1, mounting a frame; 2, rotating the spraying device; 21 a motor; 22 a drive shaft; 23 motor fixing plate; 24 a center wheel; 25 a rotation gear; 26 an outer gear; 27 a rotation gear mounting bracket; 3 a wall flow prevention device; 31 adjusting the handle; 32 slide rails; 33, a sliding block; 34 a shutter; 35 a lock nut 35; a nozzle 4; a first nozzle 4A and a second nozzle 4B; 41 spraying body; 42, an upper cover body; 43 a lower cover body; 431 blowholes; 5, a graded infusion system; 51, a first-stage conveying pipe; 52 a secondary delivery pipe; 53 a water inlet pipe; and a secondary pipe 54.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
It is to be understood that the terms "height," "width," "upper," "lower," "left," "right," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus are not to be considered as illustrative of the present invention.
As shown in fig. 1 and 2, a rare earth luminescent material preparation spraying mechanism and a preparation method thereof comprise an installation frame 1, a rotary spraying device 2 penetrating through the center of the installation frame 1, a grading infusion system 5 sleeved on the rotary spraying device 2, and a nozzle 4 fixedly connected below the rotary spraying device 2; a wall flow prevention device 3 is also arranged below the mounting rack 1; the wall flow prevention device 3 is positioned below the rotary spraying device 2.
The specific use steps are as follows: the method of the present invention is illustrated by taking the preparation process of the y + Eu + Tb luminescent material product as an example.
Comprises the following steps of (a) carrying out,
putting the oxide in a two-layer storage tank, and acidifying the oxide into rare earth feed liquid by using refined HCl, wherein the molar ratio of the oxide to hydrochloric acid is 1:1.2-1.4, and the hydrochloric acid is concentrated hydrochloric acid with the mass fraction of 37%;
secondly, pure water is put into a cubic plastic storage tank or a ceramic storage tank as bottom water, and the temperature is raised to 65 ℃;
a second layer is also provided with a stirring tank, the second layer of stirring tank is filled with oxalic acid diluent of oxalic acid prepared by pure water, and the mass ratio of oxalic acid to pure water in the oxalic acid diluent is 1: 10;
fixing the mounting rack 1 above the cubic stirring tank of one layer, connecting the output end of the stirring tank filled with oxalic acid diluent into the rotary spraying device 2, starting the rotary spraying device 2, uniformly spraying the feed liquid into the cubic stirring tank from the nozzle 4, then closing the output end of the oxalic acid diluent, connecting the output end of the acidified rare earth feed liquid into the rotary spraying device 2, starting the rotary spraying device 2 again, remixing the rare earth feed liquid and the oxalic acid diluent in a mode of spraying while stirring, then precipitating into white feed liquid, putting into a spin dryer for spin-drying, putting into a ceramic bowl, feeding into an electric kiln, heating to 950 ℃, firing for 4 hours, seeing the pink strip column powder in the bowl, namely: y + Eu + Tb luminescent material product.
The oxides include the following compounds: y is2O3 96.0％±0.005％， Eu2O3 4.0％± 0.002％，Tb4O7 0.003± 0.0003％；
The rare earth feed liquid: pure water: the mass ratio of the oxalic acid diluent is 1: 1.2.
as shown in fig. 3, 4 and 6, the mounting bracket 1 is a shell with an opening at the lower end; the rotary spraying device 5 comprises a motor fixing plate 23 fixedly connected to the upper end of the mounting frame 1, a motor 21 fixedly connected to the upper end surface of the motor fixing plate 23, a transmission shaft 22 with one end fixedly connected to an output shaft of the motor 21, a center wheel 24 fixedly sleeved on the transmission shaft 22, a rotation gear 25 in meshing transmission with the center wheel 24, and an outer gear 26 fixedly connected to the opening end of the mounting frame 1; the external gear 26 is sleeved on the central gear 24 and the rotation gear 25; more than one self-rotating gear 25 is in meshing transmission with the central gear 24, and the external gear 26 is sleeved on the outer side of the self-rotating gear 25 and is in meshing transmission; the modules and the tooth numbers of the rotation gear 25 and the central gear 24 are the same; a rotation gear mounting rack 27 is fixedly connected to the transmission shaft 22; the rotation gear 25 is rotatably connected with the rotation gear mounting rack 27; the number of the self-rotating gears is more than 25; in the embodiment, a central wheel 24 is adopted to drive 6 rotation gears 25 to rotate, and the transmission shaft 22 penetrates through the upper end face of the mounting rack 1; the wall flow prevention device 3 is disposed on the lower end surface of the external gear 26.
The rotary spraying device 2 works as follows: the motor 21 is started, the output shaft of the motor 21 is connected with the central wheel 24 in a key mode, the central wheel 24 rotates to toggle the rotation gear 25 in meshing transmission with the central wheel to rotate, the rotation gear 25 is meshed with the outer gear 26, the rotation gear 25 rotates along the axis of the central wheel 24 and also rotates along the axis of the rotation gear 25, the rotation gear 25 is located on the outer ring, a circle of spraying rings rotating at the same speed and the same rotating speed as the central wheel 24 are formed, and the central wheel 24 rotates to form the spraying rings at the same speed. The feed liquid is uniformly sprayed at the same speed when being sprayed, and crystals with approximately equal sizes can be more easily obtained when the rare earth feed liquid and the oxalic acid diluent are instantaneously crystallized.
As shown in fig. 2 and 5, the graded infusion system 5 comprises a primary delivery pipe 51 rotatably sleeved on the transmission shaft 22, a water inlet pipe 53 communicated with the upper end of the primary delivery pipe 51, and a secondary delivery pipe 52 communicated with the lower end of the primary delivery pipe 51; the rotation gear mounting rack 27 is a circular tube; the secondary conveying pipe 52 is fixedly sleeved on the outer circumferential surface of the rotation gear mounting rack 27; a first annular inner cavity A is arranged in the rotation gear 25; the secondary delivery pipe 52 is communicated with the inner cavity A; a second annular inner cavity B is arranged in the central wheel 24; the staged infusion system 5 further includes a secondary tube 54 communicating the second annular lumen B with the secondary delivery tube 52; the first annular inner cavity A is communicated with the nozzle 4; the second annular inner chamber B communicates with the nozzle 4. The number of the second annular inner cavities B is 6.
The output end of the tank body of the oxalic acid diluent or the rare earth feed liquid is communicated to the water inlet pipe 53, the valve is opened, the feed liquid firstly enters the primary conveying pipe 51 and is simultaneously conveyed to the secondary conveying pipe 52 through the shunt port of the primary conveying pipe 51, and then is conveyed to the 6 second annular inner chambers divided in the center wheel 24, each annular inner chamber conveying area is communicated with 3 nozzles 4 uniformly distributed on the circumference, and a first annular inner chamber A in each rotation gear 25 is communicated with 3 nozzles 4.
The nozzles 4 include a first nozzle 4A and a second nozzle 4B; the first nozzles 4A are uniformly distributed on the first annular inner cavity A in the circumference; the second nozzles 4B are circumferentially and uniformly distributed on the second annular inner cavity B.
As shown in fig. 7, the wall flow prevention device 3 includes a slide rail 32 fixedly connected to the inner side surface of the mounting frame 1, a slide block 33 slidably connected to the slide rail 32, and a shield 34 fixedly connected to the slide block 33; the shield 34 is a circular ring-shaped tube; the lower end of the shielding plate 34 is provided with a U-shaped groove; a through long groove matched with the sliding block 33 is formed in the height direction of the sliding rail 32. The wall flow prevention device 3 is also provided with an adjusting handle 31 fixedly connected with the sliding block 33, and the side wall of the mounting rack 1 is provided with two symmetrical long grooves parallel to the axis direction; the adjusting handle 31 moves up and down along the long groove of the mounting rack 1; the adjusting handle 31 is a circular truncated cone with a thread at one end; the threaded end of the adjusting handle 31 is in threaded connection with a lock nut 35.
As shown in fig. 8, the nozzle 4 includes a nozzle body 41, an upper cover 42 fixedly connected to the outlet of the lower end of the nozzle body 41, and a lower cover 43 fastened to the lower side of the upper cover 42; the lower cover body 43 is in a funnel shape which is opened upwards; the upper cover body 42 is in a downward-opened funnel shape; the upper cover body 42 and the lower cover body 43 are symmetrically arranged to form an inner cavity; the lower cover 43 is provided with a water spray hole 431. The water spray holes 431 are uniformly distributed on the plane of the lower cover 43.
The nozzle 4 is provided with an upper cover body 42 which has the same function as the wall flow prevention device 3 and prevents the wall flow phenomenon when being sprayed to the side wall, and the lower cover body 42 is provided with uniformly distributed water spraying holes 431 which are designed for the uniformity of the spraying of the feed liquid.
While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various modifications, changes, substitutions and alterations can be made to this embodiment without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims (8)
1. The utility model provides a tombarthite luminescent material preparation sprays mechanism which characterized in that: the device comprises a mounting rack (1), a rotary spraying device (2) penetrating through the center of the mounting rack (1), a graded infusion system (5) sleeved on the rotary spraying device (2) and a nozzle (4) fixedly connected below the rotary spraying device (2);
a wall flow prevention device (3) is arranged below the mounting rack (1);
the wall flow prevention device (3) is positioned below the rotary spraying device (2);
the mounting rack (1) is a shell with an opening at the lower end;
the spraying device (2) comprises a motor fixing plate (23) fixedly connected to the upper end of the mounting frame (1), a motor (21) fixedly connected to the upper end face of the motor fixing plate (23), a transmission shaft (22) with one end fixedly connected to an output shaft of the motor (21), a central wheel (24) fixedly sleeved on the transmission shaft (22), a rotation gear (25) in meshing transmission with the central wheel (24) and an outer gear (26) fixedly connected to the opening end of the mounting frame (1);
the external gear (26) is sleeved on the central gear (24) and the rotation gear (25);
the rotation gear (25) is meshed with the central gear (24) and is also meshed with the external gear (26) for transmission;
the module and the tooth number of the self-rotating gear (25) and the central gear (24) are the same;
a rotation gear mounting rack (27) is fixedly connected to the transmission shaft (22);
the rotation gear (25) is rotatably connected with the rotation gear mounting rack (27);
the number of the self-rotating gears (25) is more than one;
the transmission shaft (22) penetrates through the upper end face of the mounting rack (1);
the wall flow prevention device (3) is arranged on the lower end face of the outer gear (26);
the graded infusion system (5) comprises a primary delivery pipe (51) rotatably sleeved on the transmission shaft (22), a water inlet pipe (53) communicated with the upper end of the primary delivery pipe (51) and a secondary delivery pipe (52) communicated with the lower end of the primary delivery pipe (51);
the self-rotating gear mounting rack (27) is a circular tube;
the secondary conveying pipe (52) is fixedly sleeved on the outer circumferential surface of the rotation gear mounting rack (27);
a first annular inner cavity A is arranged in the rotation gear (25);
the secondary delivery pipe (52) is communicated with the inner cavity A;
a second annular inner cavity B is arranged in the central wheel (24);
the staged infusion system (5) further comprising a secondary tube (54) communicating the second annular chamber B with the secondary delivery tube (52);
the first annular inner cavity A is communicated with the nozzle (4);
the second annular inner cavity B is communicated with the nozzle (4).
2. The rare earth luminescent material preparation spraying mechanism of claim 1, wherein:
the nozzles (4) comprise a first nozzle (4A) and a second nozzle (4B);
the first nozzles (4A) are uniformly distributed on the first annular inner cavity A in the circumferential direction;
the second nozzles (4B) are uniformly distributed on the second annular inner cavity B in the circumferential direction.
3. The rare earth luminescent material preparation spraying mechanism of claim 1, wherein:
the wall flow prevention device (3) comprises a slide rail (32) fixedly connected to the inner side surface of the mounting frame (1), a slide block (33) connected to the slide rail (32) in a sliding manner, and a shielding plate (34) fixedly connected to the slide block (33);
the shielding plate (34) is a circular ring-shaped pipe;
the lower end of the shielding plate (34) is provided with a U-shaped groove;
the sliding rail (32) is provided with a through long groove matched with the sliding block (33) in the height direction.
4. The rare earth luminescent material preparation spraying mechanism of claim 3, wherein:
the wall flow prevention device (3) is also provided with an adjusting handle (31) fixedly connected with the sliding block (33);
the side wall of the mounting rack (1) is provided with two symmetrical long grooves parallel to the axis direction;
the adjusting handle (31) moves up and down along the long groove of the mounting rack (1);
the adjusting handle (31) is a circular truncated cone with a thread at one end;
the threaded end of the adjusting handle (31) is in threaded connection with a lock nut (35).
5. The rare earth luminescent material preparation spraying mechanism of claim 1, wherein:
the nozzle (4) comprises a spraying body (41), an upper cover body (42) fixedly connected to an outlet at the lower end of the spraying body (41) and a lower cover body (43) buckled below the upper cover body (42);
the lower cover body (43) is in a funnel shape which is opened upwards;
the upper cover body (42) is in a funnel shape which is opened downwards;
the upper cover body (42) and the lower cover body (43) are symmetrically arranged and form an inner cavity;
the lower cover body (43) is provided with a water spraying hole (431).
6. The rare earth luminescent material preparation spraying mechanism of claim 2, wherein:
the second annular cavities B are uniformly distributed along the circumference of the central wheel (24).
7. A method for preparing rare earth luminescent material by using the rare earth luminescent material preparation spraying mechanism of any one of claims 1 to 6, wherein the method comprises the following steps: comprises the following steps of (a) carrying out,
putting the oxide in a two-layer storage tank, and acidifying the oxide into rare earth feed liquid by using refined HCl, wherein the molar ratio of the oxide to hydrochloric acid is 1:1.2-1.4, and the hydrochloric acid is concentrated hydrochloric acid with the mass fraction of 37%;
secondly, pure water is put into a cubic plastic storage tank or a ceramic storage tank as bottom water, and the temperature is raised to 65 ℃;
a second layer is also provided with a stirring tank, the second layer of stirring tank is filled with oxalic acid diluent of oxalic acid prepared by pure water, and the mass ratio of oxalic acid to pure water in the oxalic acid diluent is 1: 10;
fixing the mounting bracket above the cubic stirring tank of one deck, inserting the output of the stirring tank filled with oxalic acid diluent into a rotary spraying device, starting the rotary spraying device, uniformly spraying the feed liquid in the cubic stirring tank from a nozzle, then closing the output end of the oxalic acid diluent, inserting the output end of the acidified rare earth feed liquid into the rotary spraying device, restarting the rotary spraying device, remixing the rare earth feed liquid and the oxalic acid diluent in a mode of stirring while spraying, then precipitating into white feed liquid, putting into a spin dryer for spin-drying, putting into a ceramic bowl, feeding into an electric kiln, heating to 950 ℃, firing for 4 hours, seeing the pink strip column type powder in the bowl, namely: y + Eu + Tb luminescent material product.
8. The method of claim 7, wherein: the oxides include the following compounds: y is2O3 96.0％ ±0.005％， Eu2O3 4.0％± 0.002％，Tb4O7 0.003± 0.0003％；
The rare earth feed liquid: pure water: the mass ratio of the oxalic acid diluent is 1: 1.2.
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