A grinding and drying device and preparation method for fluorescent material for LED lamps

Abstract

The present application relates to a grinding and drying device and preparation method for fluorescent materials for LED lamps, and relates to the technical field of grinding and drying fluorescent materials. The device comprises a grinding device, wherein an inert gas storage bottle is provided at one end of a spherical grinder, and a fluorescent powder collection device is installed in the spherical grinder; the inert gas storage bottle is connected to the spherical grinder via a gas delivery tube; the gas delivery tube is rotatably connected to the spherical grinder; the fluorescent powder collection device comprises a material receiving bin, a gas connection tube is installed on the material receiving bin, a blower is installed on the material receiving bin, a material discharge assembly is provided at the lower end of the material receiving bin, and a material collection box is provided at the lower end of the material discharge assembly; a tee is installed at the air outlet end of the blower, and a gas circulation tube and a dust collection air bag are installed on the tee. The present application has the effect of reducing the manual collection of fluorescent powder.

Description

Technical Field

[0001] The present application relates to the technical field of fluorescent material processing for LED lamps, and in particular to a grinding and drying device and a preparation method for fluorescent materials for LED lamps. Background Art

[0002] With the advancement of science and technology, LED lights are widely used in our daily lives. In the production process of LED lights, fluorescent materials are crucial. Rare earth oxides (such as Y2O3, Eu2O3), alkaline earth metal salts (such as CaCO3, Al2O3) and other raw materials are mixed according to a certain ratio. After ball milling and drying, they are calcined at high temperature (1200-1600℃) in a reducing atmosphere (such as H2 / N2) for 5-9 hours to form phosphor crystals. After the phosphor crystals are produced, they need to be ground into powder and then dried to obtain phosphor. After the phosphor is mixed with epoxy resin, it is stirred evenly and then brushed. In the process of grinding and fixing the phosphor, the fluorescent material is usually ground by ball milling. The ground phosphor needs to be manually sieved to obtain the desired phosphor. During the manual sieve process, the phosphor is easily inhaled into the lungs, affecting the health of the workers. Summary of the Invention

[0003] The purpose of this application is to provide a grinding and drying device and preparation method for fluorescent materials for LED lamps, so as to solve the technical problem that "in the process of manual screening, fluorescent powder is easily inhaled into the lungs, affecting the health of workers."

[0004] The present application provides a grinding and drying device and preparation method for fluorescent materials for LED lamps using the following technical solutions:

[0005] A device for grinding and drying fluorescent materials for LED lamps, comprising a grinding device, an inert gas storage bottle provided at one end of a spherical grinder, and a fluorescent powder collecting device installed at the end of the spherical grinder away from the inert gas storage bottle; the inert gas storage bottle is connected to the spherical grinder through a gas delivery pipe; the gas delivery pipe is rotatably connected to the spherical grinder; the fluorescent powder collecting device comprises a material receiving bin, a gas connecting pipe is installed on the material receiving bin, and the gas connecting pipe is rotatably connected to the spherical grinder; a blower is installed on the material receiving bin, and the A material discharge assembly is provided at the lower end of the material receiving bin, and a material collection box is provided at the lower end of the material discharge assembly; a tee is installed at the air outlet end of the blower, a gas circulation pipe and a dust collection air bag are installed on the tee, a gas drying assembly is installed on the gas circulation pipe, and the gas circulation pipe is connected to the gas delivery pipe at one end away from the tee; a gas heating assembly is installed on the gas delivery pipe; a gas circulation switch is provided at the front end of the gas circulation pipe; a dust collection switch is provided at the front end of the dust collection air bag; and an air intake switch is provided on the inert gas storage bottle.

[0006] Optionally, a gas drying assembly is installed on the gas circulation pipe, and the gas drying assembly includes a U-shaped tube, a liquid storage box is installed on the lower side of the U-shaped tube, a condenser is installed on the U-shaped tube, an air pressure balance pipe is installed on the liquid storage box, and the air pressure balance pipe is connected to the gas circulation pipe; a drain pipe is installed at the lower end of the liquid storage box; and a drain switch is installed on the drain pipe.

[0007] Optionally, the spherical grinder includes a support frame, on which a grinding chamber is rotatably mounted, a grinding roller is mounted in the grinding chamber; a plurality of grinding balls are placed inside the grinding chamber; a gear ring is mounted on the grinding chamber, a drive motor is mounted on the support frame, and a drive gear is mounted on the output end of the drive motor; the drive gear is meshed with the gear ring; a feeding port is mounted on the grinding chamber; a sealing plug is detachably mounted at the feeding port; and a plurality of limit gears are rotatably mounted on the support frame.

[0008] Optionally, a gas inlet pipe is installed at one end of the grinding chamber near the gas delivery pipe; a material discharge pipe is installed at one end of the grinding chamber near the gas connecting pipe; and a sealing assembly is provided between the gas inlet pipe and the gas delivery pipe and between the gas connecting pipe and the material discharge pipe.

[0009] Optionally, a V-shaped limit section is provided in the middle position of the grinding chamber, inclined sections are provided on both sides of the V-shaped limit section, and a horizontal support section is provided on the inclined section away from the V-shaped limit section. The grinding roller includes a V-shaped grinding knife clamped in the V-shaped limit section, and inclined counterweight platforms are provided on both sides of the V-shaped grinding knife. Limiting rods are installed on both sides of the inclined counterweight platform, and the limiting rods are parallel to the horizontal support section; a channel with a larger upper part and a smaller lower part is formed between the inclined section and the inclined counterweight platform.

[0010] Optionally, the material discharge assembly includes a discharge chamber, a discharge motor is installed at the end of the discharge chamber, a rotating shaft is installed at the output end of the discharge motor, the rotating shaft passes through the discharge chamber and is rotatably connected to the discharge chamber, a plurality of closed plates are installed on the rotating shaft, closed circular plates are fixed at both ends of the closed straight plates, and the outer edges of the closed straight plates and the closed circular plates are in contact with the discharge chamber.

[0011] Optionally, a box door is installed on the material collection box, a receiving hopper is detachably installed inside the material collection box, and a sealing bag is provided on the receiving hopper; an induction switch is installed in the material collection box, and the induction switch is electrically connected to the discharge motor; the material collection box is in contact with the induction switch.

[0012] Optionally, a gas concentration monitor is installed inside the grinding chamber, and a humidity monitor is installed inside the grinding chamber; the gas concentration monitor is used to monitor the concentration of inert gas; and the humidity monitor is used to monitor the humidity inside the grinding chamber.

[0013] A method for grinding and drying fluorescent materials for LED lamps, comprising the following steps:

[0014] S1, material feeding: the sintered fluorescent material is fed into the grinding chamber from the feeding port, and then the grinding medium ethanol and deionized water are added, and the feeding port is sealed with a sealing plug;

[0015] S2, inert gas addition: the inert gas in the inert gas storage bottle is input into the grinding chamber. After the grinding chamber is filled with the inert gas, the dust collection switch and the air inlet switch set at the front end of the dust collection airbag are turned off. At this time, the drive motor is turned on and the blower is controlled to run at a low speed at the same time, and the gas circulation mode is turned on;

[0016] S3, material grinding: The fluorescent material in the grinding chamber is initially broken by collision with the grinding balls during the rotation of the grinding chamber, and then formed into a slurry after being ground by the grinding chamber and the grinding rollers;

[0017] S4, liquid evaporation: continue to open the gas circulation mode, at this time, open the gas heating component and condenser, when the inert gas U-shaped tube is condensed, the grinding medium enters the liquid storage tank;

[0018] S5, phosphor collection: When the humidity in the grinding chamber drops to a certain value, the fluorescent material will generate dust in the grinding chamber. At this time, the dust collection mode is turned on. The air inlet switch on the inert gas storage bottle is turned on, the gas circulation switch is closed, and the dust collection switch is turned on. During the rotation of the grinding chamber, the dry fluorescent material turns into dust. The dust is blown by the blower and enters the phosphor collection device and the dust collection airbag.

[0019] S6, phosphor collection: gas enters the receiving bin from the gas connecting pipe, the air flow speed becomes smaller, and the phosphor carried in the air flow falls into the receiving bin under its own gravity. The phosphor that fails to fall into the receiving bin enters the dust collection airbag. The phosphor that enters the receiving bin is processed by the material discharge component and then enters the sealed bag installed on the receiving hopper.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. Add the sintered fluorescent material fragments into the grinding chamber and then add the grinding medium (alcohol or deionized water). After sufficient grinding, the grinding medium is evaporated by the blower, gas heating component, gas circulation pipe and gas drying component. The dried fluorescent material generates dust during the turning process of the grinding chamber. The gas flow is slowed down by the blower when entering the receiving bin. The fluorescent material mixed in the gas falls into the receiving bin under the action of its own gravity and is discharged into the material collection box through the material discharge component. The fluorescent material that fails to fall into the receiving bin is collected by the dust collection airbag. Therefore, no manual screening is required during the grinding and fluorescent material collection process, which reduces the diffusion of fluorescent material into the air and the contact between workers and fluorescent material, thereby effectively preventing fluorescent powder from being easily inhaled into the lungs and affecting the health of workers.

[0022] 2. During the grinding process of fluorescent materials, inert gas is filled in for protection to effectively prevent nitride from reacting with O2 and H2O in the air to form oxides, which will affect the luminescence performance (such as Ce 3+ Oxidized to Ce 4+ leading to fluorescence quenching);

[0023] 3. The gas circulation mode is used in the process of evaporating the grinding media, which can effectively reduce the waste of inert gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0025] Figure 2 This is a schematic structural diagram of a phosphor collecting device according to an embodiment of the present application;

[0026] Figure 3This is a schematic diagram of the internal structure of the phosphor collection device according to an embodiment of the present application;

[0027] Figure 4 This is a schematic diagram of the overall back structure of the embodiment of the present application;

[0028] Figure 5 This is a schematic structural diagram of a grinding device according to an embodiment of the present application;

[0029] Figure 6 This is a schematic diagram of the internal structure of the grinding device according to an embodiment of the present application;

[0030] Figure 7 This is a structural diagram of a material collection box according to an embodiment of the present application;

[0031] Figure 8 It is a schematic diagram of the processing flow structure of an embodiment of the present application.

[0032] In the figure, 1. grinding device; 11. support frame; 12. grinding chamber; 121. gas inlet pipe; 122. material discharge pipe; 123. V-shaped limit section; 124. inclined section; 125. horizontal support section; 126. gas concentration monitor; 127. humidity monitor; 13. grinding roller; 131. V-shaped grinding knife; 132. inclined counterweight platform; 133. limit rod; 14. grinding ball; 15. gear ring; 16. drive motor; 17. drive gear; 18. feeding port; 19. sealing plug; 111. limit gear; 2. inert gas storage bottle; 21. air inlet switch; 3. phosphor collection device; 31. material collection chamber; 32. gas connection 1. Connecting pipe; 33. Blower; 34. Material discharge assembly; 341. Discharge chamber; 342. Discharge motor; 343. Rotating shaft; 344. Closed straight plate; 345. Closed circular plate; 35. Material collection box; 351. Box door; 352. Material receiving hopper; 353. Induction switch; 36. Tee pipe; 37. Gas circulation pipe; 371. Gas circulation switch; 38. Dust collection airbag; 381. Dust collection switch; 4. Gas delivery pipe; 5. Gas drying assembly; 51. U-shaped pipe; 52. Liquid storage box; 53. Condensation pipe; 54. Air pressure balance pipe; 55. Drain pipe; 56. Drain switch; 6. Gas heating assembly; 7. Sealing assembly. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1 -Attached Figure 8 , further details of this application are given.

[0034] Reference Figure 1 , Figure 2 , Figure 3A grinding and drying device for fluorescent materials for LED lamps includes a grinding device 1, an inert gas storage bottle 2 is provided at one end of the grinding device 1, and a fluorescent powder collecting device 3 is installed at the end of the grinding device 1 away from the inert gas storage bottle 2; the inert gas storage bottle 2 is connected to the grinding device 1 through a gas delivery pipe 4; the gas delivery pipe 4 is rotatably connected to the grinding device 1; the fluorescent powder collecting device 3 includes a material receiving bin 31, a gas connecting pipe 32 is installed on the material receiving bin 31, and the gas connecting pipe 32 is rotatably connected to the grinding device 1; a blower 33 is installed on the material receiving bin 31, and a material receiving bin 31 is provided at the lower end. A material discharge assembly 34 is provided, and a material collection box 35 is provided at the lower end of the material discharge assembly 34; a tee pipe 36 is installed at the air outlet end of the blower 33, and a gas circulation pipe 37 and a dust collection air bag 38 are installed on the tee pipe 36, and a gas drying assembly 5 is installed on the gas circulation pipe 37, and the end of the gas circulation pipe 37 away from the tee pipe 36 is connected to the gas delivery pipe 4; a gas heating assembly 6 is installed on the gas delivery pipe 4; a gas circulation switch 371 is provided at the front end of the gas circulation pipe 37; a dust collection switch 381 is provided at the front end of the dust collection air bag 38; an air inlet switch 21 is provided on the inert gas storage bottle 2.

[0035] During the use of the grinding and drying device for fluorescent materials for LED lamps, the crushed fluorescent material is put into the grinding device 1, and then the grinding device 1 is filled with inert gas (nitrogen). After being processed by the grinding device 1, the fluorescent material becomes a slurry. The inert gas begins to circulate under the action of the blower 33 and the gas circulation pipe 37. At this time, the gas heating component 6 is turned on to heat the inert gas. The heated gas reaches the grinding device 1, and then reaches the material receiving bin 31 through the gas connecting pipe 32, and then is transported to the gas circulation pipe 37 through the blower 33, and then enters the gas drying component 5. The water in the inert gas is removed through the gas drying component 5, and then reaches the gas heating component 6 again, thereby realizing the evaporation of the grinding medium (deionized water or alcohol); when the fluorescent material begins to produce dust, Close the gas circulation switch 371 and open the dust collection switch 381. When the gas carrying dust reaches the receiving bin 31, the flow rate slows down, and the dust falls into the receiving bin 31 under the action of its own gravity. The dust that fails to fall reaches the dust collection airbag 38 (through a fiber-woven bag), is filtered by the dust collection airbag 38, and the fluorescent material is collected in the dust collection airbag 38; the fluorescent material entering the receiving bin 31 is put into the material collection box 35 through the material discharge component 34; under the action of the blower 33, the receiving bin 31 is under negative pressure, and under the action of the material discharge component 34, the convection is blocked, so that the air pressure in the material collection box 35 is close to normal pressure, thereby reducing the diffusion of dust into the air during the opening of the material collection box 35, thereby reducing the inhalation of fluorescent materials by the staff.

[0036] Reference Figure 4A gas drying assembly 5 is installed on the gas circulation pipe 37. The gas drying assembly 5 includes a U-shaped tube 51. A liquid storage box 52 is installed on the lower side of the U-shaped tube 51. A condenser 53 is installed on the U-shaped tube 51. An air pressure balance pipe 54 is installed on the liquid storage box 52. The air pressure balance pipe 54 is connected to the gas circulation pipe 37; a drain pipe 55 is installed at the lower end of the liquid storage box 52; and a drain switch 56 is installed on the drain pipe 55.

[0037] The temperature of the inert gas increases after being heated by the gas heating component 6. After entering the grinding device 1, the grinding medium is heated to form water vapor. When it reaches the U-shaped tube 51, the water vapor is condensed into small water droplets under the action of the condenser 53 and flows into the liquid storage tank 52. The air pressure balance pipe 54 on the liquid storage tank 52 is connected to the gas circulation pipe 37. The air pressure inside the liquid storage tank 52 is the same as the air pressure inside the U-shaped tube 51, which makes it easier for the liquid to enter the liquid storage tank 52; the collected liquid can be discharged from the drain pipe 55; (the gas heating component 6 is a cavity structure, and a heating wire is provided in the cavity structure. An air inlet pipe and an air outlet pipe are fixed on the cavity structure. After the inert gas enters the cavity structure, it contacts the heating wire and the temperature increases. The heating component is a prior art, so it will not be introduced in detail).

[0038] Reference Figure 1 、 Figure 4 The grinding device 1 includes a support frame 11, on which a grinding chamber 12 is rotatably mounted, and a grinding roller 13 is mounted in the grinding chamber 12; a plurality of grinding balls 14 are placed inside the grinding chamber 12; a gear ring 15 is mounted on the grinding chamber 12, a drive motor 16 is mounted on the support frame 11, and a drive gear 17 is mounted on the output end of the drive motor 16; the drive gear 17 is meshed with the gear ring 15; a feeding port 18 is mounted on the grinding chamber 12; a sealing plug 19 is detachably mounted at the feeding port 18; a plurality of limit gears 111 are rotatably mounted on the support frame 11.

[0039] The bulk fluorescent material and grinding medium are added to the grinding chamber 12 from the feeding port 18. After addition, the sealing plug 19 is threadedly connected to the feeding port 18 to seal the feeding port 18. The driving motor 16 drives the grinding chamber 12 to rotate, and the grinding balls 14 collide with the fluorescent material to further break the fluorescent material. The further broken fluorescent material is ground by the grinding roller 13 and mixed with the grinding medium to form a slurry form.

[0040] Reference Figure 4 , Figure 5 , Figure 6A gas inlet pipe 121 is installed at one end of the grinding chamber 12 close to the gas delivery pipe 4; a material discharge pipe 122 is installed at one end of the grinding chamber 12 close to the gas connecting pipe 32; a sealing component 7 is provided between the gas inlet pipe 121 and the gas delivery pipe 4 and between the gas connecting pipe 32 and the material discharge pipe 122; the sealing component 7 effectively reduces the air and dust entering the grinding chamber 12 and affecting the quality of the phosphor (the sealing component 7 is a rubber gasket, which is a prior art, refer to the shaft sealing ring, and will not be introduced here).

[0041] Refer to Figure 5. Figure 6 The grinding chamber 12 is provided with a V-shaped limiting section 123 in the middle position, and inclined sections 124 are provided on both sides of the V-shaped limiting section 123. The inclined section 124 is provided with a horizontal supporting section 125 away from the V-shaped limiting section 123. The grinding roller 13 includes a V-shaped grinding knife 131 clamped in the V-shaped limiting section 123, and inclined counterweight platforms 132 are provided on both sides of the V-shaped grinding knife 131. Limiting rods 133 are installed on both sides of the inclined counterweight platform 132, and the limiting rods 133 are parallel to the horizontal supporting section 125; a channel with a larger upper part and a smaller lower part is formed between the inclined section 124 and the inclined counterweight platform 132.

[0042] During the rotation of the grinding chamber 12, the grinding roller 13 rolls in the grinding chamber 12. The fluorescent material fragments that are crushed by the collision of the grinding balls 14 reach the inclined section 124. After being crushed again by the collision between the inclined section 124 and the inclined counterweight platform 132, they enter the V-shaped limit section 123. After being continuously crushed by the V-shaped grinding blade 131, they are formed into powder and then form a slurry with the grinding medium.

[0043] The V-shaped grinding knife 131 is stuck in the V-shaped limiting section 123, and the limiting rod 133 is parallel to the horizontal support section 125. When preventing the grinding roller 13 from tilting, the limiting rod 133 contacts the horizontal support section 125, which can effectively prevent the grinding roller 13 from excessively tilting and effectively prevent the grinding roller 13 from being misplaced and causing grinding failure.

[0044] Reference Figure 3 、 Figure 7 The material discharge assembly 34 includes a discharge chamber 341, a discharge motor 342 is installed at the end of the discharge chamber 341, and a rotating shaft 343 is installed at the output end of the discharge motor 342. The rotating shaft 343 passes through the discharge chamber 341 and is rotatably connected to the discharge chamber 341. A plurality of closed straight plates 344 are installed on the rotating shaft 343, and closed circular plates 345 are fixed at both ends of the closed straight plates 344. The outer edges of the closed straight plates 344 and the closed circular plates 345 are in contact with the discharge chamber 341; the fluorescent material entering the material receiving bin 31 falls into the trough structure formed by the closed straight plates 344 and the closed circular plates 345, and is put into the material collection box 35 after being turned over;

[0045] The outer edges of the closed straight plate 344 and the closed circular plate 345 fit into the discharge cavity 341 to form a sealing structure, thereby reducing the gas in the material collection box 35 from entering the material receiving bin 31, causing the material receiving bin 31 to generate negative pressure under the action of the blower 33, and sucking the fluorescent material powder into the material receiving bin 31; at the same time, the material collection box 35 is kept at normal pressure, reducing the gas flow in the material collection box 35 and reducing the diffusion of fluorescent material into the air.

[0046] Reference Figure 3 、 Figure 7 The material collecting box 35 is provided with a box door 351, and a material receiving hopper 352 is detachably arranged inside the material collecting box 35, and a sealing bag is provided on the material receiving hopper 352;

[0047] When the fluorescent material falls into the material collection box 35, it directly enters the receiving hopper 352. When the receiving hopper 352 is taken out, the sealed bag is directly taken out to pack the fluorescent material, thereby further reducing the transfer of fluorescent material and reducing the inhalation of fluorescent material by workers;

[0048] An induction switch 353 is installed in the material collection box 35, and the induction switch 353 is electrically connected to the discharge motor 342, and the material collection box 35 is in contact with the induction switch 353; when the box door 351 is opened and the receiving hopper 352 is taken out, the induction switch 353 controls the discharge motor 342 to stop rotating. At this time, when the receiving hopper 352 is taken out, the fluorescent material will not continue to fall, thereby further reducing the diffusion of the fluorescent material into the air; when the receiving hopper 352 is inserted into the material collection box 35, the receiving hopper 352 is in contact with the induction switch 353 again, and the discharge motor 342 rotates again to continue feeding the material into the receiving hopper 352.

[0049] Reference Figure 6 A gas concentration monitor 126 is installed inside the grinding chamber 12, and a humidity monitor 127 is installed inside the grinding chamber 12; the gas concentration monitor 126 is used to monitor the concentration of the inert gas; the humidity monitor 127 is used to monitor the humidity inside the grinding chamber 12;

[0050] The gas concentration monitor 126 is used to determine the concentration of inert gas in the grinding chamber 12 to determine whether to continue filling the inert gas; the humidity monitor 127 is used to determine the humidity in the grinding chamber 12 to determine whether to start collecting the dried fluorescent material.

[0051] Reference Figure 8 A method for grinding and drying fluorescent materials for LED lamps, comprising the following steps:

[0052] S1, material feeding: the sintered fluorescent material is fed into the grinding chamber 12 from the feeding port 18, and then the grinding medium ethanol and deionized water are added, and the feeding port 18 is sealed with a sealing plug 19;

[0053] S2, inert gas addition: the inert gas in the inert gas storage bottle 2 is input into the grinding chamber 12. After the inert gas fills the grinding chamber 12, the dust collection switch 381 and the air inlet switch 21 provided at the front end of the dust collection airbag 38 are closed. At this time, the drive motor 16 is turned on, and the blower 33 is controlled to run at a low speed, and the gas circulation mode is started;

[0054] S3, material grinding: The fluorescent material in the grinding chamber 12 is initially broken by collision with the grinding balls 14 during the rotation of the grinding chamber 12, and then is ground by the grinding chamber 12 and the grinding rollers 13 to form a slurry;

[0055] S4, liquid evaporation: continue to open the gas circulation mode, at this time, open the gas heating component 6 and the condenser 53, when the inert gas U-shaped tube 51 is condensed, the grinding medium enters the liquid storage tank 52;

[0056] S5, phosphor collection: When the humidity in the grinding chamber 12 drops to a certain value, the fluorescent material in the grinding chamber 12 generates dust, and the dust collection mode is activated. The air inlet switch 21 on the inert gas storage bottle 2 is turned on, the gas circulation switch 371 is closed, and the dust collection switch 381 is turned on. As the grinding chamber 12 rotates, the dry fluorescent material turns into dust. The dust is then blown by the blower 33 and enters the phosphor collection device 3 and the dust collection airbag 38.

[0057] S6, phosphor collection: gas enters the receiving bin 31 from the gas connecting pipe 32, the air flow speed becomes smaller, and the phosphor carried in the air flow falls into the receiving bin 31 under its own gravity. The phosphor that fails to fall into the receiving bin 31 enters the dust collection airbag 38. The phosphor that enters the receiving bin 31 is processed by the material discharge component 34 and then enters the sealed bag mounted on the receiving hopper 352.

[0058] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A grinding and drying device for fluorescent materials for LED lamps, characterized in that: The invention comprises a grinding device (1), an inert gas storage bottle (2) is provided at one end of the grinding device (1), and a fluorescent powder collecting device (3) is installed at the end of the grinding device (1) away from the inert gas storage bottle (2); the inert gas storage bottle (2) is connected to the grinding device (1) through a gas delivery pipe (4); the gas delivery pipe (4) is rotatably connected to the grinding device (1); the fluorescent powder collecting device (3) comprises a material receiving bin (31), a gas connecting pipe (32) is installed on the material receiving bin (31), and the gas connecting pipe (32) is rotatably connected to the grinding device (1); a blower (33) is installed on the material receiving bin (31), and the gas connecting pipe (32) is rotatably connected to the grinding device (1); A material discharge assembly (34) is provided at the lower end of the material receiving bin (31), and a material collecting box (35) is provided at the lower end of the material discharge assembly (34); a three-way pipe (36) is installed at the air outlet end of the blower (33), a gas circulation pipe (37) and a dust collecting air bag (38) are installed on the three-way pipe (36), a gas drying assembly (5) is installed on the gas circulation pipe (37), and the end of the gas circulation pipe (37) away from the three-way pipe (36) is connected to the gas delivery pipe (4); a gas heating assembly (6) is installed on the gas delivery pipe (4); a gas circulation switch (371) is provided at the front end of the gas circulation pipe (37); the dust collecting air bag (38) is provided with a dust collection switch (381) at the front end; the inert gas storage bottle (2) is provided with an air inlet switch (21); the gas drying assembly (5) includes a U-shaped tube (51), a liquid storage box (52) is installed on the lower side of the U-shaped tube (51), a condenser (53) is installed on the U-shaped tube (51), a pressure balance pipe (54) is installed on the liquid storage box (52), and the pressure balance pipe (54) is connected to the gas circulation pipe (37); a drain pipe (55) is installed at the lower end of the liquid storage box (52); a drain switch (56) is installed on the drain pipe (55); the grinding device (1) includes a support frame (11), A grinding chamber (12) is rotatably mounted on the support frame (11), and a grinding roller (13) is mounted in the grinding chamber (12); a plurality of grinding balls (14) are placed inside the grinding chamber (12); a gear ring (15) is mounted on the grinding chamber (12), a driving motor (16) is mounted on the support frame (11), and a driving gear (17) is mounted on the output end of the driving motor (16); the driving gear (17) is meshed with the gear ring (15); a feeding port (18) is mounted on the grinding chamber (12); a sealing plug (19) is detachably mounted at the feeding port (18); a plurality of limit gears (111) are rotatably mounted on the support frame (11);The grinding chamber (12) is provided with a V-shaped limiting section (123) at a middle position, and inclined sections (124) are provided on both sides of the V-shaped limiting section (123). The inclined section (124) is provided with a horizontal support section (125) away from the V-shaped limiting section (123). The grinding roller (13) includes a V-shaped grinding knife (131) clamped on the V-shaped limiting section (123), and inclined counterweight platforms (132) are provided on both sides of the V-shaped grinding knife (131). Limiting rods (133) are installed on both sides of the inclined counterweight platform (132), and the limiting rods (133) are parallel to the horizontal support section (125); a channel with a larger upper portion and a smaller lower portion is formed between the inclined section (124) and the inclined counterweight platform (132).

2. The grinding and drying device for fluorescent materials for LED lamps according to claim 1, characterized in that: A gas inlet pipe (121) is installed at one end of the grinding chamber (12) close to the gas delivery pipe (4); a material discharge pipe (122) is installed at one end of the grinding chamber (12) close to the gas connection pipe (32); and a sealing assembly (7) is provided between the gas inlet pipe (121) and the gas delivery pipe (4), and between the gas connection pipe (32) and the material discharge pipe (122).

3. The grinding and drying device for fluorescent materials for LED lamps according to claim 1, characterized in that: The material discharge assembly (34) includes a discharge cavity (341), a discharge motor (342) is installed at the end of the discharge cavity (341), and a rotating shaft (343) is installed at the output end of the discharge motor (342). The rotating shaft (343) passes through the discharge cavity (341) and is rotatably connected to the discharge cavity (341). A plurality of closed straight plates (344) are installed on the rotating shaft (343), and closed circular plates (345) are fixed at both ends of the closed straight plates (344). The outer edges of the closed straight plates (344) and the closed circular plates (345) are in contact with the discharge cavity (341).

4. The grinding and drying device for fluorescent materials for LED lamps according to claim 3, characterized in that: The material collection box (35) is provided with a box door (351), a material receiving hopper (352) is detachably mounted inside the material collection box (35), and a sealing bag is placed on the material receiving hopper (352); an induction switch (353) is installed inside the material collection box (35), and the induction switch (353) is electrically connected to the discharge motor (342); the material collection box (35) is in contact with the induction switch (353).

5. The grinding and drying device for fluorescent materials for LED lamps according to claim 1, characterized in that: A gas concentration monitor (126) is installed inside the grinding chamber (12), and a humidity monitor (127) is installed inside the grinding chamber (12); the gas concentration monitor (126) is used to monitor the concentration of the inert gas; and the humidity monitor (127) is used to monitor the humidity inside the grinding chamber (12).

6. A method for grinding and drying fluorescent materials for LED lamps, according to a grinding and drying device for fluorescent materials for LED lamps according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, material feeding: feeding the sintered fluorescent material into the grinding chamber (12) from the feeding port (18), adding the grinding medium, and sealing the feeding port (18) with a sealing plug (19); S2, inert gas addition: the inert gas in the inert gas storage bottle (2) is input into the grinding chamber (12), and after the inert gas fills the grinding chamber (12), the dust collection switch (381) and the air inlet switch (21) provided at the front end of the dust collection air bag (38) are closed, and the drive motor (16) is turned on, and the blower (33) is controlled to run at a low speed at the same time, and the gas circulation mode is turned on; S3, material grinding: the fluorescent material in the grinding chamber (12) is initially broken by collision with the grinding balls (14) during the rotation of the grinding chamber (12), and then formed into a slurry after being ground by the grinding chamber (12) and the grinding roller (13); S4, liquid evaporation: continue to open the gas circulation mode, at this time, open the gas heating component (6) and the condenser (53), when the inert gas U-shaped tube (51) is condensed, the grinding medium enters the liquid storage tank (52); S5, fluorescent powder collection: When the humidity in the grinding chamber (12) drops to a certain value, the fluorescent material in the grinding chamber (12) will generate dust, and the dust collection mode is turned on at this time; the air inlet switch (21) on the inert gas storage bottle (2) is turned on, the gas circulation switch (371) is turned off, and the dust collection switch (381) is turned on. During the rotation of the grinding chamber (12), the dry fluorescent material turns into dust, and the dust is blown by the blower (33) into the fluorescent powder collection device (3) and the dust collection air bag (38); S6, phosphor collection: gas enters the receiving bin (31) from the gas connecting pipe (32), the air flow speed becomes smaller, and the phosphor carried in the air flow falls into the receiving bin (31) under its own gravity. The phosphor that fails to fall into the receiving bin (31) enters the dust collection air bag (38). The phosphor that enters the receiving bin (31) is processed by the material discharge component (34) and enters the sealed bag set on the receiving hopper (352).

Images