CN213761612U - Material mixing device - Google Patents

Abstract

The utility model discloses a material mixing device, which comprises a material mixing tank, wherein a discharge hole at the bottom of the material mixing tank is connected with a discharge pipe, and a solenoid valve is connected on the discharge pipe in series; the electromagnetic valve is provided with a first discharging end, a second discharging end and a feeding end, the discharging pipe is respectively connected with the feeding end and the first discharging end in series, and the second discharging end is connected with a return pipe; one end of the return pipe penetrates through the side wall of the mixing tank and is communicated with the inner cavity; a homogenizing pump is connected in series with the return pipe. The utility model adds the return pipeline serially connected with the homogenizing pump at the bottom of the mixing tank, and carries out secondary primary grinding when the discharge port of the mixing tank has piled massive slurry blocks, thereby solving the problem of discharge port blockage and ensuring that the slurry is more fully mixed; the one-inlet and two-outlet electromagnetic valve controls the flow path of the slurry, and the operation is convenient and quick; the homogenizing pump and the mixing tank made of 304 stainless steel materials are not easily corroded by the lithium iron phosphate slurry, and the service life of the mixing device is prolonged.

Description

Material mixing device

Technical Field

The utility model relates to a lithium ion battery processing technology field specifically is a compounding device.

Background

The material mixing process is an essential link in the whole production process of the lithium ion battery anode material lithium iron phosphate. Feeding, mixing, coarse grinding and fine grinding are a complete wet grinding treatment process, feeding and mixing are usually carried out simultaneously in the production process, and after the mixing is finished, the lithium iron phosphate anode material meeting the production requirements is obtained by fully grinding through a coarse grinding sand mill and a fine grinding sand mill, cooling and drying.

In the feeding and mixing process, because the lithium iron phosphate slurry has certain viscosity and humidity, the existing mixing tank has the problems of poor dispersing effect and uneven mixing, and materials at the bottom of the mixing tank are precipitated and agglomerated and can block a pipeline; in addition, because the existing mixing tank is not sufficiently mixed and stirred, the quality difference of final products is generated when lithium iron phosphate slurry of different production batches is adopted, so that the pole piece compaction of the lithium iron phosphate battery is reduced, and the electric performance is remarkably reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compounding device to solve current compounding jar dispersion effect not good, the inhomogeneous problem of compounding.

In order to achieve the above object, the utility model provides a following technical scheme:

a material mixing device comprises a material mixing tank, wherein a discharge pipe is connected to a discharge port at the bottom of the material mixing tank, and an electromagnetic valve is connected to the discharge pipe in series; the electromagnetic valve is provided with a first discharging end, a second discharging end and a feeding end, the discharging pipe is respectively connected with the feeding end and the first discharging end in series, and the second discharging end is connected with a return pipe; one end of the return pipe penetrates through the side wall of the mixing tank and is communicated with the inner cavity; a homogenizing pump is connected in series with the return pipe.

As a further aspect of the present invention: the discharge pipe is divided into two sections by the electromagnetic valve, namely a first discharge pipe close to the material mixing tank and a second discharge pipe far away from the material mixing tank, the inner diameter of the first discharge pipe is 6-8cm, and the inner diameter of the second discharge pipe is 4-6 cm.

As a further aspect of the present invention: and the extending end of the second discharge pipe is connected with the rough grinding pipeline.

As a further aspect of the present invention: the inner diameter of the return pipe is 4-6 cm.

As a further aspect of the present invention: the stirring shaft is arranged in the mixing tank in the vertical direction, the bottom of the stirring shaft is connected with anchor type stirring blades, and the shaft body of the stirring shaft is sequentially connected with at least three groups of linear stirring blades in the horizontal direction.

As a further aspect of the present invention: the material of the mixing tank is SUS304 stainless steel.

As a further aspect of the present invention: the homogenizing pump has a pair of coupled rotor and stator made of SUS304 stainless steel.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has novel structure, adds a return pipeline with a homogenizing pump at the bottom of the mixing tank, and carries out secondary primary grinding when the discharge port of the mixing tank has piled massive slurry blocks, thereby solving the problem of discharge port blockage and leading the slurry to be more fully mixed; the one-inlet and two-outlet electromagnetic valve controls the flow path of the slurry, and the operation is convenient and quick; the homogenizing pump and the mixing tank made of 304 stainless steel materials are not easily corroded by the lithium iron phosphate slurry, and the service life of the mixing device is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure: 1-mixing tank, 11-stirring shaft, 12-anchor type stirring blade, 13-linear stirring blade, 2-discharging pipe, 21-first discharging pipe, 22-second discharging pipe, 3-return pipe, 4-homogenizing pump, 5-electromagnetic valve, 51-first discharging end, 52-second discharging end, 53-feeding end and 6-coarse grinding pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, a material mixing device includes a material mixing tank 1, a material discharging pipe 2 is connected to a material discharging port at the bottom of the material mixing tank 1, and a solenoid valve 5 is connected to the material discharging pipe 2 in series; the electromagnetic valve 5 is a one-inlet and two-outlet three-way electromagnetic valve, and is provided with a first discharge end 51, a second discharge end 52 and a feed end 53, the discharge pipe 2 is respectively connected in series with the feed end 53 and the first discharge end 51, and the second discharge end 52 is connected with a return pipe 3; one end of the return pipe 3 is arranged on the side wall of the mixing tank 1 in a penetrating way and is communicated with the inner cavity; a homogenizing pump 4 is connected in series with the return pipe 3. Mixing tank 1 is SUS304 stainless steel material, and this material is favorable to slowing down the jar body by the corrosive effect of lithium iron phosphate thick liquids.

Wherein, the operation principle of the homogenizing pump 4 is as follows:

the homogenizing pump 4 has an elongated working chamber in which a pair of coupled stator and rotor are mounted. The motor drives the intermediate shaft of the homogenizing pump to rotate at a high speed, a vacuum is formed between the rotating stator and the rotating stator which rotate at the high speed, the slurry is sucked into the working cavity along the axial direction of the rotating stator by the centrifugal force acting force generated by the vacuum, the slurry is thrown into a narrow and precise gap between the stator and the rotor from the radial direction by the strong centrifugal force, and the slurry is subjected to the acting forces of centrifugal extrusion, impact and the like, so that the materials are preliminarily dispersed and emulsified; the homogenizing pump 4 has a high linear speed at the outer end of the rotor rotating at a high speed, and forms strong mechanical force, hydraulic shearing, liquid layer friction and impact tearing, so that the slurry is fully dispersed, crushed, emulsified and homogenized, and simultaneously is ejected through the stator slot, and the slurry becomes more fine and smooth in the process, and the oil and water are promoted to be melted. The slurry is continuously ejected from the radial direction at a high speed, so that the slurry follows the path of the return pipe 3 to change the flow direction of the slurry, and meanwhile, an upper and a lower strong stirring turbulence are formed under the action of an upper and a lower axial suction forces generated by the rotor area, so that the slurry is continuously returned to the mixing tank 1. The process can be carried out for a plurality of times of circulating treatment according to the process requirements, and the slurry in the material mixing tank 1 is circulated for a plurality of times, thereby completing the processes of dispersion, emulsification and homogenization.

Further, the discharge pipe 2 is divided into two sections by the electromagnetic valve 5, namely a first discharge pipe 21 close to the material mixing tank 1 and a second discharge pipe 22 far away from the material mixing tank 1, wherein the inner diameter of the first discharge pipe 21 is 6-8cm, and the inner diameter of the second discharge pipe 22 is 4-6 cm. The inner diameter of the return pipe 3 is 4-6 cm. The inner diameter of the first discharging pipe 21 is larger, so that smooth flowing of untreated slurry is facilitated, and the second discharging pipe 22 is thinner, so that the connection with the rough grinding pipeline 6 is facilitated; the return pipe 3 is also thin, which facilitates a faster return of the slurry emulsified by the homogenizing pump 4.

Further, the mixing tank 1 is made of SUS304 stainless steel, and the material is not easy to be corroded by the lithium iron phosphate slurry; a stirring shaft 11 in the vertical direction is arranged in the mixing tank 1, the bottom of the stirring shaft 11 is connected with an anchor type stirring blade 12, and the shaft body of the stirring shaft 11 is sequentially connected with at least three groups of linear stirring blades 13 in the horizontal direction; the mixing tank 1 has a low-speed stirring mode and a high-speed stirring mode, wherein the anchor type stirring blade 12 rotating in the low-speed stirring mode plays a role in stirring, and the rotating speed can reach 100r/min at most; the straight stirring blade 13 plays a role in stirring in a high-speed stirring mode, and the highest rotating speed can reach 1500 r/min.

When the utility model is used, the stirring blades in the mixing tank 1 are started to rotate, the electromagnetic valve 5 is controlled to ensure that the first discharging end 51 is in an open state and the second discharging end 52 is in a closed state, and at the moment, slurry flows through the discharging pipe 2 through the discharging port of the mixing tank 1 and flows to the coarse grinding pipeline 6 so as to enter the coarse grinding mechanism; when the staff observes 1 unloading speed of compounding jar and slows down, judge that its discharge gate circulation is not smooth, control solenoid valve 5 this moment and make first discharge end 51 be in the closed condition, second discharge end 52 is in the open mode, thick liquids flow to in the back flow pipe 3 reachs the homogenizing pump 4 through the discharge gate of compounding jar 1, centrifugal force that the stator formed at high-speed rotatory rotor after the dispersion emulsification of homogenizing pump 4, in the middle of the compounding jar 1 is constantly flowed back to under effects such as suction force, thick liquids are stirred by the stirring leaf once more, flow to the discharge gate through the action of gravity. According to different process requirements, the slurry can be circularly refluxed to meet the requirements of specific process standards.

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (7)

1. A mixing device comprises a mixing tank (1), and is characterized in that a discharge hole at the bottom of the mixing tank (1) is connected with a discharge pipe (2), and an electromagnetic valve (5) is connected on the discharge pipe (2) in series; the electromagnetic valve (5) is provided with a first discharging end (51), a second discharging end (52) and a feeding end (53), the discharging pipe (2) is connected with the feeding end (53) and the first discharging end (51) in series, and the second discharging end (52) is connected with the return pipe (3); one end of the return pipe (3) penetrates through the side wall of the mixing tank (1) and is communicated with the inner cavity; a homogenizing pump (4) is connected in series on the return pipe (3).

2. A mixing device according to claim 1, characterized in that the solenoid valve (5) divides the tapping pipe (2) into two parts, a first tapping pipe (21) near the mixing tank (1) and a second tapping pipe (22) remote from the mixing tank (1), the first tapping pipe (21) having an internal diameter of 6-8cm and the second tapping pipe (22) having an internal diameter of 4-6 cm.

3. A mixing device according to claim 2, characterized in that the extended end of the second tapping pipe (22) is connected to a rough grinding pipe (6).

4. A mixing device according to claim 1, characterised in that the return pipe (3) has an inner diameter of 4-6 cm.

5. A mixing device according to claim 1, characterized in that a vertical stirring shaft (11) is arranged inside the mixing tank (1), an anchor type stirring blade (12) is connected to the bottom of the stirring shaft (11), and at least three groups of horizontal linear stirring blades (13) are sequentially connected to the shaft body of the stirring shaft (11).

6. A mixing device according to claim 1, characterized in that the material of the mixing bowl (1) is SUS304 stainless steel.

7. A mixing apparatus according to claim 1, wherein said homogenizing pump (4) has a pair of coupled rotor and stator made of SUS304 stainless steel.

Images