CN-122006276-A - Spray drying spray gun

Abstract

The invention relates to a spray drying spray gun, which comprises an outer ring channel and an inner channel which are isolated from each other, wherein the inner channel penetrates through the outer ring channel and extends out of the outer ring channel upwards, the upper end of the inner channel is connected with a feed hole and an air inlet hole, the outer ring channel is connected with an outer ring air inlet hole, the lower end of the outer ring channel is provided with an outer ring air outlet, the outer ring air outlet and a central axis are provided with an inclined angle a which is inclined outwards, the lower end of the inner channel is provided with an arc-shaped convex surface, an air outlet hole is arranged on the arc-shaped convex surface, the air outlet hole and the central axis are provided with an inclined angle b which is inclined outwards, and the inclined angle a and the inclined angle b are both more than 0 and less than 90 degrees.

Inventors

• ZHANG ZHIHUI
• CAO JIANG
• LIU YANLIN
• LU ZHICONG

Assignees

• 深圳市百柔新材料技术有限公司

Dates

Publication Date

20260512

Application Date

20260318

Claims (9)

1. 1. A spray drying spray gun is characterized by comprising an outer ring channel and an inner channel which are isolated, wherein the inner channel penetrates through the outer ring channel and extends out of the outer ring channel upwards, the upper end of the inner channel is connected with a feeding hole and an air inlet hole, the outer ring channel is connected with an outer ring air inlet hole, the lower end of the outer ring channel is provided with an outer ring air outlet, the outer ring air outlet and a central axis are provided with an inclined angle a which is inclined outwards, the lower end of the inner channel is provided with an arc-shaped convex surface, an air outlet hole is arranged on the arc-shaped convex surface, the air outlet hole and the central axis are provided with an inclined angle b which is inclined outwards, and the inclined angle a and the inclined angle b are both more than 0 and less than 90 degrees.
2. 2. The spray drying spray gun according to claim 1, wherein the upper end of the inner channel extending out of the outer ring channel is provided with the feeding hole, the side part of the inner channel is communicated with the air inlet hole, and the side surface of the cavity is connected with the outer ring air inlet hole.
3. 3. A spray drying spray gun according to claim 1 or 2, comprising an outer barrel, an inner barrel, an upper cover and a nut sleeve, said inner barrel forming said inner passage, said inner barrel being disposed within said outer barrel, said outer barrel having an upper end connected to said upper cover and a lower end connected to said nut sleeve, said inner barrel extending upwardly beyond said upper cover and having downwardly projecting said arcuate convex surface projecting outwardly of said nut sleeve, said outer annular inlet aperture being formed in a side wall of said outer barrel.
4. 4. A spray drying spray gun according to claim 3, wherein said nut sleeve is sealingly connected to said outer barrel with a sealing ring therebetween.
5. 5. The spray drying spray gun according to claim 4, wherein the lower end of the outer cylinder is provided with an inner groove, an inner wall forming the inner groove is provided with an inner thread, the nut sleeve is provided with an outer thread portion, and the outer thread portion is matched with the inner thread.
6. 6. A spray drying spray gun according to claim 1, wherein said included angle a and said included angle b are equal.
7. 7. A spray drying spray gun according to claim 1, wherein said included angle a and said included angle b are each 20-45 degrees.
8. 8. A spray drying spray gun according to claim 1, wherein the outer ring air outlet and the air outlet holes are each provided with at least one turn in an annular array.
9. 9. A spray drying spray gun according to claim 1, wherein the aperture of the outer ring air outlet and the aperture of the air outlet holes are each 0.5-2mm.

Description

Spray drying spray gun Technical Field The invention relates to the technical field of electronic cigarettes, in particular to a spray drying spray gun. Background The lithium battery is a battery system which takes lithium metal or lithium compound as a positive electrode material and realizes charge and discharge through migration of lithium ions between a positive electrode and a negative electrode. Its development dates back to the 70 s of the 20 th century, when scientists began to explore the potential of lithium as a battery material. Lithium is the lightest metal in nature, has extremely high electrochemical activity, and has theoretical energy density far exceeding that of traditional battery materials (such as lead acid, nickel cadmium and the like). With the continuous development of the age and technological progress, lithium batteries are becoming more and more common in daily electronic products, electric automobiles, energy storage devices and the like. Lithium batteries generally consist of five major parts, namely a positive electrode, a negative electrode, an electrolyte, a separator and a casing. During charging, lithium ions are separated from the positive electrode and are inserted into the negative electrode through the electrolyte and the discharging is opposite. Wherein the separator is usually mainly made of polyolefin materials such as polyethylene, polypropylene, etc. The diaphragm is required to separate the anode and the cathode, so that the battery is prevented from being short-circuited, the battery is prevented from being overheated, lithium ions can freely pass through the diaphragm, and the charging and discharging performances of the battery are ensured. Therefore, the separator of the lithium battery must have excellent properties such as sufficient mechanical strength, proper porosity, high chemical stability, good electrolyte wetting, high ionic conductivity, high thermal stability, etc. However, polyolefin-based separators have some drawbacks that are difficult to ignore. For example, the porous material has unsatisfactory porosity, limits the ion transmission efficiency, has poor thermal stability, is easy to shrink and deform under a high-temperature environment, even causes internal short circuit of a battery to cause safety accidents, and has poor wettability to polar liquid electrolyte to cause the problems of increased resistance, reduced energy density and the like of the lithium ion battery. To solve various problems of polyolefin-based base films, polymer-coated separator technologies have been developed. Namely, a polymer coating is coated on the base film, so that the performance deficiency of the base film is improved. Conventional coatings typically employ PVDF and PMMA materials. The material is coated on the diaphragm by roller coating, spraying and other processes, and then the water or oily solvent in the material is dried by heating, so that the diaphragm with the high-molecular polymer coating is obtained. The diaphragm is wound together with the positive and negative electrode plates of the battery, and then is compacted, fixed and molded under certain pressure and certain temperature and time. The preparation of the diaphragm coating comprises the steps of uniformly stirring emulsion and colloid which are specially prepared, forming slurry, atomizing the slurry into powder with controllable particle size and moisture through spray drying equipment, wherein a specific atomizing mode comprises a pressure nozzle, a rotary atomizer, an airflow atomizer and the like, heating the powder in a spray drying cavity, evaporating the moisture into powder after atomizing small liquid drops to be heated, exhausting air through a motor, and pumping the powder into a receiving tower through a pipeline under the action of negative pressure to collect the powder. Therefore, in the spraying process, the shape, particle size, moisture and other parameters of the formed powder are important to the preparation of the diaphragm coating slurry, and after the diaphragm is coated, the particle size is too large, the anode diaphragm and the cathode diaphragm are wound in the preparation process of the battery and then pressurized to a certain extent, so that the formed diaphragm is possibly damaged, and faults such as short circuit and the like of the battery are caused. At present, the parameters D10, D50 and D90 of powder obtained by spraying in a common spray drying technology cannot meet the direct use requirement of customers, secondary crushing or sanding is needed to reduce the particle size, the production process is complex, and the productivity is low. Disclosure of Invention In view of the above, it is necessary to provide a spray drying spray gun that reduces the spray particle size. In order to solve the technical problems, the spray drying spray gun comprises an outer ring channel and an inner channel which are isolated, wherein the inner channel penetrates thr