Stirring and cooling device of lithium iron phosphate kiln

Abstract

The utility model discloses a stirring and cooling device of a lithium iron phosphate kiln. The stirring and cooling device comprises an aligning and blocking component, a positioning and fixing component and a stirring component, wherein the aligning and blocking component is used for adjusting the position of a sagger filled with sintering materials in the kiln; the positioning and fixing component is used for fixing the sagger; the sagger is installed at a replacement chamber of a kiln outlet, materials in the sagger are stirred to achieve the cooling effect rapidly and evenly, and the problems that the discharging temperature of the sagger is high, and the materials are oxidized are solved. The material cooling time and the cooling water consumption are greatly reduced, and the production cost is reduced; the alignment blocking part and the positioning and fixing part ensure that the stirring assembly is positioned in the center of the sagger, the stirring and cooling effects are improved, and meanwhile equipment damage caused by shaking of the sagger along with stirring is prevented; the included angle between the S-shaped stirring teeth and the rake head is 45-60 degrees, materials in the sagger are stirred to be evenly mixed inside and outside, and the cooling effect is better; the S-shaped stirring teeth and the triangular prism type rake head prevent the stirring rod from taking out materials when the stirring rod ascends.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cooling device, especially a stirring cooling device for lithium iron phosphate kiln. BACKGROUND

[0002] With the vigorous development of new energy industry, lithium batteries are applied in various industries, and the demand is very large. There are various types of new energy lithium batteries, among which lithium iron phosphate batteries rapidly rise due to the performance advantages of long service life, safe use, fast charging and discharging, high temperature resistance, large capacity and the like. In the production process of lithium iron phosphate material, nitrogen protection is needed in the sintering process of the kiln to prevent oxidation, and the material after being discharged from the kiln needs to be cooled to below 150℃, otherwise the material after being discharged from the kiln is easy to be oxidized by oxygen in the air, and the oxidized material becomes red waste. The kiln itself has a cooling section, and the material in the sagger is cooled after passing through the cooling water, but the cooling effect is not good. Especially because the material is loaded in the sagger, the material around the sagger cools down faster, and the material in the middle cools down slower, the temperature is not uniform, in order to make the material around and in the sagger reach the discharge temperature, a long cooling time is needed, a large amount of cooling water is consumed, and the production cycle is prolonged, the production efficiency is reduced, and the production cost of the enterprise is increased. SUMMARY

[0003] The utility model aims at providing a stirring cooling device for lithium iron phosphate kiln to quickly and uniformly cool the sintered material.

[0004] Technical scheme: the stirring cooling device for lithium iron phosphate kiln comprises alignment blocking components for adjusting the position of the sagger loaded with sintered material in the kiln, positioning and fixing components for fixing the sagger, and stirring components for stirring and cooling the material in the sagger; the stirring components comprise a plurality of stirring assemblies fixedly connected through stirring lifting plates, and third air cylinders are arranged at both ends of the stirring lifting plates to drive the stirring assemblies to move up and down; the stirring assembly comprises a stirring rod penetrating through the top wall of the kiln, a motor is arranged at the top end of the stirring rod to drive the stirring rod to rotate, a three-prism-shaped rake head is connected to the bottom end of the stirring rod to prevent the powder from being brought out when the stirring rod is lifted, and a plurality of S-shaped stirring teeth are arranged on the bottom surface of the rake head to uniformly stir the powder and further prevent the powder from being stirred out of the sagger.

[0005] Further, the material of the stirring rod, the rake head and the stirring teeth in the stirring assembly is a non-metallic material, such as ceramic. The high-temperature powder is prevented from generating metal particle foreign matters by rubbing with the stirring paddle, which affects the safety of the final battery.

[0006] Further, the rake head is provided with a triangular prism shape, the edges are upward, and the two sides are inclined planes. When the stirring assembly is raised, the circular top allows the powder above to quickly slide into the saggar to prevent the powder from being carried out of the saggar and causing waste. The angle between the stirring teeth on the bottom surface of the rake head and the rake head is 45°-60°, and the stirring teeth are provided with 6 S-shaped stirring teeth. The S-shaped stirring teeth allow the powder around the saggar to be extruded to the inside and the inside powder to be pushed to the outside. The internal material is high, and the external material is low in temperature. The cooling effect is better after mixing. While ensuring uniform stirring of the internal and external powder, the powder is given a downward force, further preventing the powder from overflowing the saggar during stirring.

[0007] Further, the stirring rod is provided with a rotation checking member for monitoring whether the stirring assembly is running normally. The rotation checking member includes a connecting block rotating with the stirring rod and a proximity switch for sensing whether the connecting block rotates. The proximity switch senses the rotation frequency of the stirring assembly within a unit time to determine whether the stirring assembly is running normally, discovers the stirring assembly failure in time, and ensures the stirring and cooling effect by timely maintenance. The motor is a step motor with adjustable speed, and the speed is 15-30 r / min to avoid high-speed rotation causing the material to fall outside the saggar. Each step motor is connected with a stirring paddle to ensure synchronous rotation of the stirring paddle. The upper part of the stirring paddle is provided with an angular contact bearing to reduce the rotation resistance of the stirring paddle and simultaneously serve as a fixing function to prevent the stirring shaft from shaking left and right.

[0008] Further, the alignment blocking component includes a blocking plate for adjusting the position of the saggar, a plurality of first guide rods penetrating the top wall of the kiln and connected with the blocking plate, and a first cylinder provided on the top of the kiln for driving the first guide rods to move up and down. The positioning and fixing component includes a mounting plate fixed on the outer shell of the kiln, a second guide rod penetrating the mounting plate, a pushing plate fixedly connected with the second guide rod, and a second cylinder provided on the mounting plate for driving the second guide rod to move left and right. The plurality of guide rods ensure that the blocking plate is smoothly driven by the cylinder to prevent collision on the saggar.

[0009] Further, a reinforcing plate is provided between the mounting plate and the outer shell of the kiln to prevent the side wall of the kiln from being deformed under stress. The side wall of the kiln is deformed after being stressed for 5 mm, and the reinforcing plate welded improves its strength.

[0010] Further, the contact surface of the blocking plate and the pushing plate with the saggar is provided with a high-temperature-resistant friction rubber gasket to prevent damage to the saggar during positioning and fixing and stirring.

[0011] Further, the first guide rod, the second guide rod and the stirring rod are provided with sealing rings between the stirring rod and the kiln for preventing material powder from drifting, and the sealing rings are provided with linear bearings at the upper part, which are used for fixing the first guide rod, the second guide rod and the stirring rod and have a certain guiding effect, and the linear bearings can reduce the resistance of the guide rod or the stirring rod during movement and further prevent the sagging of the saggar during stirring from causing damage to the saggar.

[0012] Beneficial effects: compared with the prior art, the utility model has the following advantages: 1, install at the replacement room of kiln export, through the material in the stirring saggar makes it fast, uniform reach cooling effect, solve the saggar discharge temperature is high, the problem that material is oxidized;2, greatly reduce the material cooling time and the cooling water consumption, reduce the production cost and equipment investment cost;3, the alignment blocking part and the positioning fixed part ensure that the stirring assembly is positioned at the center of the saggar, improve the stirring cooling effect, prevent the saggar from shaking and causing equipment damage;4, the stirring motor is a stepping motor, the rotating speed is adjustable, the precision is high, the included angle between the S-shaped stirring tooth and the rake head is 45 ° ~ 60 °, the material in the saggar is mixed uniformly, and the cooling effect is better;5, the S-shaped stirring tooth and the three-prism type rake head prevent the material from being taken out when the stirring rod rises;6, the rotary detection piece monitors the running condition of the stirring assembly in real time, and ensures that the stirring cooling is carried out normally. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 2 It is a structural schematic view of the stirring part of the utility model;

[0015] Figure 3 It is a front view of the stirring part of the utility model;

[0016] Figure 4 It is a bottom view of the rake head of the utility model;

[0017] Figure 5 It is a structural schematic view of the alignment blocking part of the utility model;

[0018] Figure 6 It is a structural schematic view of the positioning fixed part of the utility model. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model will be further described below with reference to the drawings.

[0020] As Figure 1The stirring and cooling device of the lithium iron phosphate kiln comprises an alignment blocking component 3 for adjusting the position of the sintering material sagger 5 in the kiln 1, a positioning and fixing component 4 for fixing the sagger 5, and a stirring component 2 for stirring and cooling the material in the sagger 5.

[0021] As shown in Figure 2 , 3 and 4, the stirring component 2 comprises a plurality of stirring assemblies 7 which are fixedly connected through a stirring lifting plate 6, the two ends of the stirring lifting plate 6 are provided with third cylinders 8 for driving the stirring assemblies 7 to move up and down, one end of each third cylinder 8 is fixedly connected with the stirring lifting plate 6, and the other end is fixedly connected with the upper surface of the kiln 1, the upper surface of the kiln 1, the two sides of the third cylinder 8, and the third guide rods 22 which are symmetrically arranged through the stirring lifting plate 6 are provided for increasing the lifting stability of the stirring lifting plate 6, the stirring assembly 7 comprises a stirring rod 11 which penetrates through the top wall of the kiln 1, the top end of the stirring rod 11 is provided with a motor 12 for driving it to rotate, and the bottom end is connected with a harrow head 9 for stirring the material to uniformly cool it, the shape of the harrow head 9 is a horizontally arranged triangular prism, six S-shaped stirring teeth 10 are arranged on the bottom surface of the harrow head 9, the included angle between the stirring teeth 10 and the harrow head 9 is 45° (which can be set to 45-60°), and the materials of the harrow head 9, the stirring teeth 10 and the stirring rod 11 are ceramic, the stirring rod 11 is provided with a rotation checking piece for monitoring whether the stirring assembly 7 is normally running, the rotation checking piece comprises a connecting block 13 which rotates with the stirring rod 11 and a proximity switch 23 for sensing whether the connecting block 13 rotates, the rotation frequency of the stirring assembly in a unit time is sensed to determine whether the stirring assembly is normally running, a sealing ring is arranged between the stirring rod 11 and the kiln 1 for preventing the material powder from floating out of the kiln, and a linear bearing is arranged on the upper part of the sealing ring for fixing the stirring rod 11 and reducing the rotating resistance thereof.

[0022] As shown in Figure 5 , the alignment blocking component 3 comprises a blocking plate 14 for adjusting the position of the sagger 5, four first guide rods 15 which penetrate through the top wall of the kiln 1 and are connected with the blocking plate 14, and a first cylinder 16 arranged at the top of the kiln 1 for driving the first guide rods 15 to move up and down, one end of the first cylinder 16 is fixedly connected with the upper surface of the kiln 1, and the other end is fixedly connected with the top ends of the four first guide rods 15 through a connecting rod, a recess is arranged on the contact surface between the blocking plate 14 and the sagger 5, a high-temperature-resistant friction rubber gasket is arranged in the recess for preventing the sagger 5 from being abraded, a sealing ring is arranged between the first guide rods 15 and the top wall of the kiln 1 for preventing the material powder from floating, and a linear bearing is arranged on the upper part of the sealing ring for fixing the first guide rods 15 and reducing the moving resistance thereof.

[0023] As shown in Figure 6As shown, the positioning and fixing component 4 comprises a mounting plate 17 fixed on the shell of the kiln 1, a second guide rod 18 penetrating through the mounting plate 17, a pushing plate 19 fixedly connected with the second guide rod 18, and a second cylinder 20 arranged on the mounting plate 17 and used for driving the second guide rod 18 to move leftward and rightward; one end of the second cylinder 20 is fixed on the mounting plate 17, and the other end thereof is fixedly connected with the other ends of the two second guide rods 18 through a connecting rod; a reinforcing plate 21 for preventing the side wall of the kiln 1 from being deformed under stress is arranged between the mounting plate 17 and the shell of the kiln 1; a high-temperature-resistant friction rubber gasket for preventing the saggar 5 from being broken by collision is arranged on the contact surface between the pushing plate 19 and the saggar 5; a sealing ring for preventing material powder from drifting is arranged between the second guide rod 18 and the top wall of the kiln 1, and a linear bearing is arranged on the upper portion of the sealing ring and used for fixing the second guide rod 18 and reducing the resistance of the second guide rod 18 to move leftward and rightward.

Claims

1. A stirring and cooling device for a lithium iron phosphate kiln, comprising an alignment blocking component (3) for adjusting the position of a sagger (5) containing sintered material inside the kiln (1), a positioning and fixing component (4) for fixing the sagger (5), and a stirring component (2) for stirring and cooling the material inside the sagger (5); wherein the stirring component (2) comprises a plurality of stirring assemblies (7) fixedly connected by a stirring lifting plate (6), and a third cylinder (8) is provided at both ends of the stirring lifting plate (6) for driving the stirring assemblies (7) to move up and down; characterized in that, The stirring assembly (7) includes a stirring rod (11) that penetrates the top wall of the kiln (1). The top of the stirring rod (11) is equipped with a motor (12) that drives it to rotate, and the bottom of the stirring rod (11) is connected to a horizontally arranged triangular prism-shaped rake head (9) to prevent powder from being carried out when it is raised. The bottom surface of the rake head (9) is provided with multiple sets of S-shaped stirring teeth (10) for uniformly stirring the powder and further preventing the powder from being stirred out of the sagger (5).

2. The stirring and cooling device for a lithium iron phosphate kiln according to claim 1, characterized in that, The stirring rod (11), rake head (9) and stirring teeth (10) of the stirring assembly (7) are made of ceramic.

3. The stirring and cooling device for a lithium iron phosphate kiln according to claim 1 or 2, characterized in that, The angle between the stirring teeth (10) and the rake head (9) is 45°~60°; there are 6 stirring teeth (10).

4. The stirring and cooling device for a lithium iron phosphate kiln according to claim 1, characterized in that, The stirring rod (11) is provided with a rotating inspection piece for monitoring whether the stirring assembly (7) is operating normally; the rotating inspection piece includes a connecting block (13) that rotates with the stirring rod (11) and a proximity switch (23) for sensing whether the connecting block (13) has rotated.

5. The stirring and cooling device for a lithium iron phosphate kiln according to claim 1, characterized in that, The alignment blocking component (3) includes a blocking plate (14) for adjusting the position of the sagger (5), multiple first guide rods (15) that penetrate the top wall of the kiln (1) and connect to the blocking plate (14), and a first cylinder (16) set on the top of the kiln (1) for driving the first guide rods (15) to move up and down.

6. The stirring and cooling device for a lithium iron phosphate kiln according to claim 5, characterized in that, The positioning and fixing component (4) includes a mounting plate (17) fixed on the outer shell of the kiln (1), a second guide rod (18) passing through the mounting plate (17), a push plate (19) fixedly connected to the second guide rod (18), and a second cylinder (20) set on the mounting plate (17) for driving the second guide rod (18) to move left and right.

7. The stirring and cooling device for a lithium iron phosphate kiln according to claim 6, characterized in that, A reinforcing plate (21) is provided between the mounting plate (17) and the outer shell of the kiln (1) to prevent the side wall of the kiln (1) from deforming under stress.

8. The stirring and cooling device for a lithium iron phosphate kiln according to claim 6, characterized in that, The contact surfaces of the baffle plate (14), the push plate (19) and the sagger (5) are provided with high-temperature resistant friction rubber sheets to prevent damage to the sagger.

9. The stirring and cooling device for a lithium iron phosphate kiln according to claim 6, characterized in that, A sealing ring is provided between the first guide rod (15), the second guide rod (18) and the stirring rod (11) and the kiln (1) to prevent the material powder from drifting. A linear bearing is provided on the upper part of the sealing ring to fix the first guide rod (15), the second guide rod (18) and the stirring rod (11) and reduce their motion resistance.

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