Shaftless supporting claw type stirring device

Abstract

The utility model belongs to the technical field of raw material mixing, and particularly relates to a shaftless supporting claw type stirring device which comprises a tank body and a driving device, the driving device is installed above the outer portion of the tank body, a stirring device is arranged in the tank body and connected with the driving device through a transmission device, and the stirring device comprises a hollow stirring shaft. And a plurality of stirring blades are longitudinally distributed on the stirring shaft. The stirring shaft is made into a hollow structure, so that the weight of the stirring shaft is reduced, the whole shaftless supporting claw type stirring device is more stable during operation, a supporting structure does not need to be arranged at the bottom of the stirring shaft, foreign matters generated by metal friction are prevented from being brought into lithium iron phosphate slurry, and metal foreign matters are prevented from being introduced into a mixture.

Description

Technical Field

[0001] The utility model belongs to the technical field of raw material mixing, and in particular relates to a claw-type stirring device without shaft support. Background Art

[0002] In the raw material mixing process of preparing lithium iron phosphate, the uniformity, stability and introduction of foreign matter of the raw material mixing directly play a key role in the finished product characteristics of lithium iron phosphate. At the same time, the rate of raw material mixing also directly affects the production efficiency of lithium iron phosphate.

[0003] Prior art CN214765148U discloses an eccentrically arranged high-speed stirring device for slow stirring, comprising a reaction vessel, a slow stirring device is arranged at the center of the reaction vessel, a high-speed stirring device is eccentrically arranged on the reaction vessel, the high-speed stirring device comprises a first mounting base plate fixed on the reaction vessel, a first bracket is arranged on the first mounting base plate, a high-speed driving device is fixed on the upper end of the first bracket, an output rod of the high-speed driving device is connected to a first stirring shaft through an elastic coupling, the lower part of the first stirring shaft extends into the reaction vessel, and a first impeller is installed at the bottom end of the first stirring shaft. The high-speed dispersion device of the prior art is easy to cause physical and chemical changes in the material additive part, and the device is complex, and it is difficult to repair and maintain during use. In addition, there is a bottom bracket, and the rotation friction inside the equipment will introduce metal foreign matter.

[0004] Prior art CN207641468U discloses a large-scale reaction tank stirring device, including a tank body and a driving device. The driving device is installed on the top of the tank body and is used to provide the power required for stirring the entire equipment. The tank body is provided with a stirring device, and the stirring device is installed inside the tank body. The stirring device is connected to the driving device through a transmission device. The stirring device includes a stirring shaft and a frame stirrer. The frame stirrer is rotatably connected to the stirring shaft through a fixed part. The stirring shaft is provided with a plurality of first stirring blades, which are tiltedly arranged on the stirring shaft, and the first stirring blades are evenly distributed along the axial direction of the stirring shaft. Similarly, the prior art has a complex stirring structure, and the equipment is difficult to install, dismantle and overhaul. In addition, there is a bottom bracket, and the rotational friction inside the equipment will introduce metal foreign matter.

[0005] Therefore, the prior art needs to be further improved. Utility Model Content

[0006] The problem to be solved by the utility model is: how to avoid the introduction of metallic foreign matter into the mixture during the raw material mixing process.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A shaftless claw-type stirring device comprises a tank body and a driving device, wherein the driving device is installed above the outside of the tank body. A stirring device is arranged in the tank body and connected to the driving device via a transmission device. The stirring device comprises a hollow stirring shaft on which a plurality of stirring blades are longitudinally distributed.

[0009] Furthermore, the driving device is a motor, the transmission device is a coupling, and a reducer is arranged between the motor and the coupling.

[0010] Furthermore, the stirring blades include a plurality of transverse stirring blades, and the transverse stirring blades are inclined at an angle ranging from 30° to 60° relative to a horizontal plane.

[0011] Furthermore, the length of the transverse stirring blade is 1 / 2 of the inner diameter of the tank body.

[0012] Furthermore, the stirring blade includes a claw-type stirring blade arranged at the bottom of the stirring shaft, and the claw-type stirring blade includes a main blade arranged laterally, and two auxiliary blades that are mirror-symmetrical along the stirring shaft and distributed longitudinally and connected to the main blade.

[0013] Furthermore, the center line of the main blade and the center line of the auxiliary blade are located in the same plane.

[0014] Furthermore, the length of the main blade is 1 / 2 of the length of the lateral stirring blade.

[0015] Furthermore, the inclination range of the auxiliary blade relative to the plane where the center line of the main blade and the center line of the auxiliary blade are located is 30 to 60 degrees.

[0016] Furthermore, the shaftless claw-type stirring device also includes a frame, which is fixed to the top of the tank body and rotatably connected to the stirring shaft at the top of the tank body.

[0017] Furthermore, a liquid seal is adopted between the stirring shaft and the tank body.

[0018] Furthermore, the shaftless supported claw type stirring device also includes a frame, which is fixed to the top of the tank body and rotatably connected to the stirring shaft at the top of the tank body. A mounting base is sleeved on the stirring shaft between the frame and the top of the tank body, and the top of the mounting base abuts against the bottom of the frame, and the bottom end of the mounting base abuts against the top of the tank body.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] (1) The utility model reduces the weight of the stirring shaft by making the stirring shaft into a hollow structure, making the entire shaftless support claw type stirring device more stable during operation, and eliminating the need to set a support structure at the bottom of the stirring shaft, thereby preventing foreign matter generated by metal friction from being brought into the lithium iron phosphate slurry and avoiding the introduction of metal foreign matter into the mixture.

[0021] (2) The utility model uses a plurality of inclined downward-pressure transverse stirring blades to achieve rapid vertical mixing in the tank body. At the same time, the claw-type stirring blades at the bottom layer include a main blade parallel to the transverse stirring blade, and two auxiliary blades symmetrically distributed longitudinally along the stirring axis and connected to the main blade. The auxiliary blades are inclined by 30 to 60 degrees relative to the plane where the center line of the main blade and the center line of the auxiliary blade are located, thereby reducing the stirring dead angle at the bottom of the tank body, allowing the raw materials to be quickly mixed, and improving the efficiency and uniformity of positive electrode materials such as lithium iron phosphate in the raw material mixing stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the shaftless support claw type stirring device of the utility model.

[0023] Reference numerals:

[0024] 1-reducer; 2-coupling; 3-frame; 4-mounting base plate; 5-liquid medium; 6-stirring shaft; 7-horizontal stirring blade; 8-claw stirring blade; 81-main blade; 82-auxiliary blade; 9-tank body; 10-motor; 11-channel steel frame. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of the utility model.

[0026] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0027] like Figure 1 As shown, the utility model provides a non-shaft-supported claw-type stirring device, which is used to stir the raw materials in the tank body 9, including a stirring shaft 6 vertically fixed in the tank body 9, and a stirring blade fixed on the stirring shaft 6, wherein the bottom end of the stirring shaft 6 is located at the bottom of the tank body 9, and the top end of the stirring shaft 6 is located outside the top of the tank body 9. The stirring shaft 6 can drive the stirring blade to rotate, so that the stirring blade stirs and mixes the raw materials in the tank body 9.

[0028] The stirring blades include four transverse stirring blades 7 longitudinally distributed at equal intervals on the stirring shaft 6 and a claw stirring blade 8 fixed at the bottom end of the stirring shaft 6. The stirring shaft 6 can drive the transverse stirring blades 7 and the claw stirring blades 8 to rotate, thereby stirring and mixing the raw materials.

[0029] As a preferred embodiment, the included angle of the projection views of adjacent transverse stirring blades 7 in the top view direction is 90°, or may be 0°.

[0030] The transverse stirring blade 7 is inclined at an angle of 30 to 60 degrees relative to the horizontal plane, preferably 45 degrees. The rotation direction of the transverse stirring blade 7 is to press the raw material downward at 30 to 60 degrees. By adopting four layers of downward-pressing transverse stirring blades 7 with an inclination range of 30 to 60 degrees, the raw materials are quickly mixed up and down in the tank body 9.

[0031] The length of the transverse stirring blade 7 is 1 / 2 of the inner diameter of the tank body 9. In this embodiment, the diameter of the transverse stirring blade 7 is 2000 mm, and the distance between adjacent transverse stirring blades 7 is 1000 mm.

[0032] The claw-type stirring blade 8 includes a main blade 81 parallel to the transverse stirring blade 7 , and two auxiliary blades 82 which are distributed in a mirror-symmetrical manner along the longitudinal direction of the stirring shaft 6 and connected to both ends of the main blade 81 .

[0033] As a preferred embodiment, the projection angle between the main blade 81 and the adjacent transverse stirring blade 7 in the top view direction is 90°, or 0°. The center line of the main blade 81 and the center line of the auxiliary blade 82 are located in the same plane, and the auxiliary blade 82 is inclined in the range of 30 to 60° relative to the plane where the center line of the main blade 81 and the center line of the auxiliary blade 82 are located, preferably 45°.

[0034] The main blade 81 presses the raw material downward at 30-60 degrees, and the auxiliary blade 82 presses the raw material toward the wall of the tank body 9. The claw-type stirring blade 8 reduces the stirring dead angle at the bottom of the tank body 9, so that the raw materials can be mixed quickly, and the efficiency and uniformity of positive electrode materials such as lithium iron phosphate in the raw material mixing stage are improved.

[0035] The main blades 81 stir and drive the raw materials to be transported to the bottom of the tank body 9 , and the auxiliary blades 82 stir and drive the raw materials to be transported along the radial direction of the stirring shaft 6 and away from the stirring shaft 6 .

[0036] The length of the main blade 81 is 1 / 2 of the length of the horizontal stirring blade 7 .

[0037] The shaftless claw stirring device also includes a frame 3 and a mounting base plate 4. The frame 3 is fixed to the top of the tank body 9, and the frame 3 is rotatably connected to the stirring shaft 6 at the top of the tank body 9. The frame 3 is connected to the stirring shaft 6 through a bearing. The stirring shaft 6 between the frame 3 and the top of the tank body 9 is sleeved with a mounting base plate 4, and the stirring shaft 6 and the tank body 9 are rotatably connected through the frame 3 and the mounting base plate 4.

[0038] The top of the mounting base plate 4 abuts against the bottom of the frame 3, and the bottom of the mounting base plate 4 abuts against the top of the tank body 9. The center of the top of the tank body 9 has an opening, and a channel steel frame 11 is fixedly installed in the opening. The channel steel frame 11 is located below the mounting base plate 4, and the bottom of the channel steel frame 11 is located at the bottom of the opening of the tank body 9. The stirring shaft 6 is inserted into the channel steel frame 11, and the liquid medium 5 is filled between the channel steel frame 11 and the stirring shaft 6 to seal the tank body 9 to prevent raw material leakage or foreign matter from being introduced into the tank body 9. After the liquid medium 5 is used for sealing, the bottom of the mounting base plate 4 no longer needs to be connected and fixed with a shaft sleeve, which simplifies the structure.

[0039] The stirring shaft 6 is a hollow structure. For example, the thickness of the stirring shaft 6 is 22.5-42.5 mm and the diameter is 245 mm. Compared with the existing stirring shaft diameter of 200 mm under the same conditions, the stirring shaft 6 of the hollow structure of this embodiment reduces its own weight and increases the diameter of the stirring shaft 6. The entire shaft-free supporting claw stirring device is more stable during operation, and there is no need to set a supporting structure at the bottom of the stirring shaft 6, which prevents foreign matter from being brought into the lithium iron phosphate raw material due to metal friction.

[0040] The top of the stirring shaft 6 is connected to a reducer 1 through a coupling 2, and a motor 10 is connected to one side of the reducer 1. The output of the motor 10 drives the stirring shaft 6 to rotate through the reducer 1 and the coupling 2, and then the stirring shaft 6 drives the horizontal stirring blade 7 and the claw stirring blade 8 to rotate, so as to stir and mix the raw materials, and press the raw materials from the upper part of the tank body 9 to the lower part through each horizontal stirring blade 7 layer by layer to the position of the claw stirring blade 8 at the bottom of the tank body 9.

[0041] The specific working process is as follows:

[0042] The motor 10 drives the transverse stirring blade 7 to transfer pressure to the raw materials downward to mix the raw materials, the main blade 81 of the claw stirring blade 8 transfers pressure to the raw materials downward to mix the raw materials, and the auxiliary blade 82 of the claw stirring blade 8 transfers pressure to the wall of the tank body 9 to mix the raw materials.

[0043] In the area from the topmost horizontal stirring blade 7 to the claw stirring blade 8 in the tank body 9, the raw materials are transferred and mixed from top to bottom. In the area from the claw stirring blade 8 to the bottom of the tank body 9, the raw materials are transferred and mixed from the claw stirring blade 8 to the bottom of the tank body 9 and then from the central area of ​​the bottom of the tank body 9 to the edge area of ​​the tank body 9.

[0044] In the edge area of ​​the tank body 9 where no stirring blades exist, the raw materials are transferred and mixed from the bottom of the tank body 9 to the top of the tank body 9. Thus, the directional circulation mixing of the raw materials inside the tank body 9 is achieved, the uniformity of the raw material mixing is improved, and the stirring rate is increased. At the same time, the deposition of the raw materials at the bottom of the tank body 9 is avoided. In addition, the stirring device has a simple structure and is easy to repair and maintain, and there is no supporting structure such as a shaft sleeve inside, which avoids the introduction of metal foreign matter.

[0045] The above technical features constitute the best implementation example of the present utility model, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the needs of different situations.

[0046] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A non-shaft-supported claw-type stirring device, comprising a tank body and a driving device, wherein the driving device is installed above the outside of the tank body, and a stirring device is arranged in the tank body, and the stirring device is connected to the driving device through a transmission device, characterized in that: The stirring device comprises a hollow stirring shaft, on which a plurality of stirring blades are longitudinally distributed; the stirring blades comprise claw-type stirring blades arranged at the bottom end of the stirring shaft.

2. The shaftless claw stirring device according to claim 1, characterized in that: The driving device is a motor, the transmission device is a coupling, and a reducer is arranged between the motor and the coupling.

3. The shaftless claw stirring device according to claim 1, characterized in that: The stirring blades include a plurality of transverse stirring blades, and the inclination angle of the transverse stirring blades relative to the horizontal plane ranges from 30° to 60°.

4. The shaftless claw stirring device according to claim 3, characterized in that: The length of the horizontal stirring blade is 1 / 2 of the inner diameter of the tank.

5. The shaftless claw stirring device according to claim 3 or 4, characterized in that: The claw-type stirring blade comprises a main blade arranged transversely and two auxiliary blades which are mirror-symmetrical along the stirring shaft and are distributed longitudinally and connected to the main blade.

6. The shaftless claw stirring device according to claim 5, characterized in that: The centerline of the main blade and the centerline of the auxiliary blade are located in the same plane.

7. The shaftless claw stirring device according to claim 5, characterized in that: The length of the main blade is 1 / 2 of the length of the horizontal stirring blade.

8. The shaftless claw stirring device according to claim 6, characterized in that: The inclination range of the auxiliary blade relative to the plane where the center line of the main blade and the center line of the auxiliary blade are located is 30 to 60 degrees.

9. The shaftless claw stirring device according to claim 8, characterized in that: A liquid seal is used between the stirring shaft and the tank body.

10. The shaftless claw stirring device according to claim 9, characterized in that: The shaftless claw stirring device also includes a frame, which is fixed to the top of the tank body and rotatably connected to the stirring shaft at the top of the tank body. A mounting base is sleeved on the stirring shaft between the frame and the top of the tank body, and the top of the mounting base abuts against the bottom of the frame, and the bottom of the mounting base abuts against the top of the tank body.

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