Lithium hexafluorophosphate filling device

Abstract

The utility model relates to a lithium hexafluorophosphate filling device. The lithium hexafluorophosphate filling device comprises a material box, a stirring mechanism is arranged in the material box, a discharging pipe is arranged at the lower end of the material box, a filling pipe is arranged at the lower end of the discharging pipe, the filling pipe comprises a first hard pipe section, a corrugated pipe section and a second hard pipe section which are sequentially arranged from top to bottom, and a discharging valve is arranged on the first hard pipe section; a telescopic cylinder for driving the corrugated pipe section to stretch out and draw back is arranged between the first hard pipe section and the second hard pipe section, an isolating ring used for being matched with a tank opening of the storage tank in a sealing mode is arranged on the second hard pipe section and comprises a shell with an inner cavity, drying agents are arranged in the shell, and through holes communicated with the inner cavity are formed in the upper side face and the lower side face of the shell respectively. According to the lithium hexafluorophosphate storage tank, the discharging speed of lithium hexafluorophosphate is increased, the storage tank is communicated with outside air through the isolating ring, and charging of lithium hexafluorophosphate is facilitated; and the problem that water vapor in external air enters the storage tank to cause decomposition of lithium hexafluorophosphate is also avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium hexafluorophosphate production equipment, and particularly relates to a lithium hexafluorophosphate filling device. Background Technique

[0002] Lithium hexafluorophosphate has always been the most important electrolyte lithium salt used in commercial lithium batteries. At present, the preparation method of lithium hexafluorophosphate is to first rectify and purify anhydrous hydrogen fluoride to obtain high-purity anhydrous hydrogen fluoride, then dissolve lithium fluoride in high-purity anhydrous hydrogen fluoride to obtain an anhydrous hydrogen fluoride solution containing lithium fluoride, and then add phosphorus pentachloride to prepare a saturated solution of lithium hexafluorophosphate. Finally, the saturated solution of lithium hexafluorophosphate is subjected to low-temperature crystallization, solidification separation, drying, and pulverization packaging to obtain lithium hexafluorophosphate products.

[0003] In order to facilitate transportation, the crystallized lithium hexafluorophosphate is usually filled into a storage tank for transportation. At present, the conventional method is to directly insert a filling pipe into the storage tank for filling. However, lithium hexafluorophosphate decomposes rapidly due to the action of water vapor when exposed to air, releasing PF 5 and generating white smoke, resulting in waste of lithium hexafluorophosphate and reduction of quality. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a lithium hexafluorophosphate filling device.

[0005] The technical solution of the lithium hexafluorophosphate filling device of the utility model is as follows:

[0006] The lithium hexafluorophosphate filling device includes a material box, a stirring mechanism is arranged in the material box, a discharge pipe is arranged at the lower end of the material box, a filling pipe is arranged at the lower end of the discharge pipe, the filling pipe includes a first hard pipe section, a corrugated pipe section and a second hard pipe section arranged in sequence from top to bottom, a discharge valve is arranged on the first hard pipe section, a telescopic cylinder for driving the corrugated pipe section to expand and contract is arranged between the first hard pipe section and the second hard pipe section, and an isolation ring for sealingly cooperating with the tank opening of the storage tank is arranged on the second hard pipe section. The isolation ring includes a housing with an inner cavity, a desiccant is arranged in the housing, and through holes communicated with the inner cavity are respectively arranged on the upper and lower side surfaces of the housing.

[0007] Furthermore, the stirring mechanism includes a stirring shaft and a driving motor. The driving motor is fixedly connected to the upper side of the material box through a motor fixing seat. The stirring shaft includes a central shaft. A plurality of horizontally extending connecting rods are fixedly connected to the upper end of the central shaft. Stirring rods are fixedly connected to the lower sides of the ends of the connecting rods. A turning auger is arranged on the lower side of the central shaft. A sleeve is arranged outside the turning auger. The sleeve is fixedly connected to the inner wall of the material box through a fixing rod.

[0008] Further, the material box includes a box body and a box cover detachably connected to the upper end of the box body. The motor fixing seat is fixedly connected to the upper side of the box cover. The box cover is provided with a feed pipe. The box body includes a cylindrical section and a conical section integrally formed at the lower end of the cylindrical section. The discharge pipe is fixedly connected to the center position at the lower end of the conical section.

[0009] Further, a plurality of support legs are fixedly connected to the outer wall of the conical section.

[0010] Further, the lower end of the discharge pipe is in a conical structure inclined towards the filling pipe. The central axis extends into the discharge pipe. A discharge auger is provided on the central axis in the discharge pipe. The rotation direction of the discharge auger is opposite to that of the turning auger.

[0011] Further, the cylinder body of the telescopic cylinder is fixedly connected to the outer wall of the first hard pipe section through a first fixing plate, and the piston rod of the telescopic cylinder is fixedly connected to the outer wall of the second hard pipe section through a second fixing plate.

[0012] Further, the inner wall of the isolation ring is hermetically and fixedly connected to the second hard pipe section. The inner cavity is in a ring structure. A sealing gasket for hermetically cooperating with the storage tank is provided on the lower side of the isolation ring.

[0013] The utility model provides a lithium hexafluorophosphate filling device, and its beneficial effects are as follows:

[0014] When the lithium hexafluorophosphate filling device of the utility model is in use, the lithium hexafluorophosphate to be filled is added into the material box through the feed pipe. The driving motor is started, and the driving motor drives the stirring shaft to rotate. The stirring rods on the stirring shaft stir the lithium hexafluorophosphate in the material box, avoiding the accumulation and compaction of the lithium hexafluorophosphate in the material box. The turning auger on the stirring shaft turns the lithium hexafluorophosphate at the bottom of the material box upward, avoiding the accumulation and compaction of lithium hexafluoroaluminate at the bottom of the material box. The tank opening of the storage tank is placed under the filling pipe. The piston rod of the telescopic cylinder extends out, the corrugated pipe elongates, and the lower end of the second hard pipe section extends into the storage tank. When the isolation ring on the second hard pipe section is tightly pressed and sealed with the tank opening of the storage tank, the telescopic cylinder stops operating. The discharge valve is opened, and the discharge valve transports the lithium hexafluorophosphate in the filling pipe to the storage tank. During this process, the discharge auger transports the lithium hexafluorophosphate downward, improving the discharge speed of the lithium hexafluorophosphate. The isolation ring not only realizes the connection between the storage tank and the outside air, which is helpful for the filling of lithium hexafluorophosphate, but also avoids the problem that water vapor in the outside air enters the storage tank and causes the decomposition of lithium hexafluorophosphate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the lithium hexafluorophosphate filling device of the utility model;

[0016] Figure 2 is Figure 1 the enlarged view of part A in

[0017] Figure 3 It is a schematic internal structure diagram of the isolation ring in the lithium hexafluorophosphate filling device of the present utility model;

[0018] In the figure: 1, box body; 2, box cover; 3, feed pipe; 4, discharge pipe; 5, support leg; 6, motor fixing seat; 7, driving motor; 8, central shaft; 9, connecting rod; 10, stirring rod; 11, sleeve; 12, fixing rod; 13, turning auger; 14, discharging auger; 15, first hard pipe section; 16, corrugated pipe section; 17, second hard pipe section; 18, discharging valve; 19, first fixing plate; 20, telescopic cylinder; 21, second fixing plate; 22, isolation ring; 23, outer shell; 24, desiccant; 25, gasket; 26, through hole. Specific embodiments

[0019] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0020] A specific embodiment of the lithium hexafluorophosphate filling device of the present utility model is as Figure 1 , Figure 2 , Figure 3 shown, including a material box, a stirring mechanism is arranged in the material box, a discharge pipe 4 is arranged at the lower end of the material box, a filling pipe is arranged at the lower end of the discharge pipe 4, and the filling pipe includes a first hard pipe section 15, a corrugated pipe section 16 and a second hard pipe section 17 arranged in sequence from top to bottom. A discharging valve 18 is arranged on the first hard pipe section 15, and a telescopic cylinder 20 for driving the corrugated pipe section 16 to expand and contract is arranged between the first hard pipe section 15 and the second hard pipe section 17. An isolation ring 22 for sealingly cooperating with the tank opening of the storage tank is arranged on the second hard pipe section 17. The isolation ring 22 includes an outer shell 23 with an inner cavity, a desiccant 24 is arranged in the outer shell 23, and through holes 26 communicating with the inner cavity are respectively arranged on the upper and lower side surfaces of the outer shell 23.

[0021] The stirring mechanism includes a stirring shaft and a driving motor 7. The driving motor 7 is fixedly connected to the upper side of the material box through a motor fixing seat 7. The stirring shaft includes a central shaft 8. A plurality of horizontally extending connecting rods 9 are fixedly connected to the upper end of the central shaft 8. Stirring rods 10 are fixedly connected to the lower sides of the ends of the connecting rods 9. A turning auger 13 is arranged on the lower side of the central shaft 8. A sleeve 11 is arranged outside the turning auger 13. The sleeve 11 is fixedly connected to the inner wall of the material box through a fixing rod 12. The material box includes a box body 1 and a box cover 2 detachably connected to the upper end of the box body 1. The motor fixing seat 7 is fixedly connected to the upper side of the box cover 2. A feed pipe 3 is arranged on the box cover 2. The box body 1 includes a cylindrical section and a conical section integrally formed at the lower end of the cylindrical section. The discharge pipe 4 is fixedly connected to the center position of the lower end of the conical section.

[0022] A number of support legs 5 are fixedly connected to the outer wall of the conical section. The lower end of the discharge pipe 4 is of a conical structure inclined towards the filling pipe. The central shaft 8 extends into the discharge pipe 4. A discharge auger 14 is provided on the central shaft 8 in the discharge pipe 4, and the rotation direction of the discharge auger 14 is opposite to that of the material turning auger 13. The cylinder body of the telescopic cylinder 20 is fixedly connected to the outer wall of the first hard pipe section 15 through the first fixing plate 19, and the piston rod of the telescopic cylinder 20 is fixedly connected to the outer wall of the second hard pipe section 17 through the second fixing plate 21. The inner wall of the isolation ring 22 is hermetically and fixedly connected to the second hard pipe section 17, and the inner cavity is of an annular structure. A sealing gasket 25 for sealing cooperation with the storage tank is provided on the lower side of the isolation ring 22.

[0023] When the lithium hexafluorophosphate filling device of the present utility model is in use, the lithium hexafluorophosphate to be filled is added to the feed tank through the feed pipe 3. The driving motor 7 is started, and the driving motor 7 drives the stirring shaft to rotate. The stirring rods 10 of the stirring shaft stir the lithium hexafluorophosphate in the feed tank, avoiding the accumulation and compaction of the lithium hexafluorophosphate in the feed tank. The material turning auger 13 on the stirring shaft turns the lithium hexafluorophosphate at the bottom of the feed tank upward, avoiding the accumulation and compaction of aluminum hexafluorosulfate at the bottom of the feed tank. The tank mouth of the storage tank is placed under the filling pipe. The piston rod of the telescopic cylinder 20 extends, the corrugated pipe elongates, and the lower end of the second hard pipe section 17 extends into the storage tank. When the isolation ring 22 on the second hard pipe section 17 is pressed and sealed with the tank mouth of the storage tank, the telescopic cylinder 20 stops operating. The discharge valve 18 is opened, and the discharge valve 18 conveys the lithium hexafluorophosphate in the filling pipe to the storage tank. During this process, the discharge auger 14 conveys the lithium hexafluorophosphate downward, improving the discharge speed of the lithium hexafluorophosphate. The isolation ring 22 not only realizes the communication between the storage tank and the outside air, which is helpful for the filling of lithium hexafluorophosphate, but also avoids the problem that the water vapor in the outside air enters the storage tank and causes the decomposition of lithium hexafluorophosphate.

[0024] The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A lithium hexafluorophosphate filling device, characterized in that: It comprises a material box, wherein a stirring mechanism is arranged inside the material box, a discharge pipe is arranged at the lower end of the material box, a filling pipe is arranged at the lower end of the discharge pipe, the filling pipe comprises a first hard pipe section, a bellows section and a second hard pipe section arranged in sequence from top to bottom, a discharge valve is arranged on the first hard pipe section, a telescopic cylinder for driving the bellows section to be telescopic is arranged between the first hard pipe section and the second hard pipe section, an isolation ring for sealing with the tank mouth of the storage tank is provided on the second hard pipe section, the isolation ring comprises an outer shell with an inner cavity, a desiccant is arranged in the outer shell, and through holes communicating with the inner cavity are respectively provided on the upper and lower side surfaces of the outer shell.

2. The lithium hexafluorophosphate filling device according to claim 1, characterized in that: The stirring mechanism includes a stirring shaft and a driving motor, the driving motor is fixedly connected to the upper side of the material box through a motor fixing seat, the stirring shaft includes a central shaft, the upper end of the central shaft is fixedly connected to a plurality of horizontally extending connecting rods, the lower side of the end of the connecting rod is fixedly connected to a stirring rod, the lower side of the central shaft is provided with a turning auger, the outer side of the turning auger is provided with a sleeve, and the sleeve is fixedly connected to the inner wall of the material box through a fixing rod.

3. The lithium hexafluorophosphate filling device according to claim 2, characterized in that: The material box includes a box body and a box cover detachably connected to the upper end of the box body, the motor fixing seat is fixedly connected to the upper side of the box cover, a feed pipe is provided on the box cover, the box body includes a cylindrical section and a conical section integrally formed at the lower end of the cylindrical section, and the discharge pipe is fixedly connected to the center position of the lower end of the conical section.

4. The lithium hexafluorophosphate filling device according to claim 3, characterized in that: A plurality of supporting legs are fixedly connected to the outer wall of the tapered section.

5. The lithium hexafluorophosphate filling device according to claim 2, characterized in that: The lower end of the discharge pipe is in a conical structure inclined toward the filling pipe, and the central axis extends into the discharge pipe. A discharge auger is arranged on the central axis in the discharge pipe, and the rotation direction of the discharge auger is opposite to that of the turning auger.

6. The lithium hexafluorophosphate filling device according to claim 1, characterized in that: The cylinder body of the telescopic cylinder is fixedly connected to the outer wall of the first hard pipe section through a first fixing plate, and the piston rod of the telescopic cylinder is fixedly connected to the outer wall of the second hard pipe section through a second fixing plate.

7. The lithium hexafluorophosphate filling device according to claim 1, characterized in that: The inner wall of the isolation ring is sealed and fixedly connected to the second hard pipe section, the inner cavity is an annular structure, and the lower side of the isolation ring is provided with a sealing gasket for sealing with the storage tank.

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