A slurry tank mixing device

Abstract

This invention discloses a slurry tank mixing device, comprising longitudinal steel rails fixedly mounted on both sides of the slurry tank, a transverse trolley mounted above the slurry tank and capable of traveling longitudinally along the steel rails, a transverse track fixedly mounted on the trolley, a base mounted on the trolley and capable of traveling transversely along the track, a mixer fixedly mounted on the base, and a drive unit mounted on the trolley for driving the trolley longitudinally and / or driving the base transversely. When the mixer is running, it agitates the slurry in the slurry tank, preventing sedimentation or accumulation. Driven by the drive unit, the impeller of the mixer moves transversely, longitudinally, or obliquely within the slurry tank, agitating all corners of the slurry tank and avoiding dead zones. The impeller of the mixer can also be reduced in size, and the power of the motor can also be reduced. With a smaller impeller diameter, the mixing area is larger as the impeller moves, and the reduced motor power saves energy.

Description

Technical Field

[0001] This invention relates to the technical field of wastewater treatment equipment for steel plants, and in particular to a slurry tank stirring device. Background Technology

[0002] During steelmaking, solid particles generated in steel production are typically transported using slurry pumps. Before transport, the solid particles (such as scale) generated during production are mixed with water to form a slurry, which is then collected in a slurry tank for temporary storage before being pumped away by the slurry pump.

[0003] Since solid particles are insoluble in water, sedimentation and accumulation will occur when slurry is left in the slurry tank for a long time. To prevent the sedimentation of solid particles, a stirrer is usually installed in the slurry tank to agitate the slurry and prevent the solid particles from settling.

[0004] Currently, slurry tanks are typically rectangular with a large length-to-width ratio, and the agitator is fixedly connected to the tank. If only one agitator is installed, a large impeller diameter and a powerful motor are required, resulting in uneven mixing. Solid particles tend to settle or accumulate near the tank walls and corners due to slow water flow, especially in areas along the length of the tank away from the agitator. To reduce this, the impeller diameter and motor power must be further increased, leading to over-mixing near the agitator and under-mixing in areas further away, resulting in sedimentation and accumulation. Therefore, this setup is energy-intensive and produces poor mixing results.

[0005] If multiple agitators are installed along the length of the slurry tank, the cost of equipment purchase, installation and subsequent maintenance will increase. In actual use, the area between two adjacent agitators near the tank wall will also become a dead corner, resulting in the sedimentation or accumulation of solid particles. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a slurry tank stirring device to solve the problem that the existing slurry tank is not stirred evenly when using a stirrer, and is prone to sedimentation or siltation.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A slurry tank mixing device includes longitudinal steel rails fixedly installed on both sides of the slurry tank, a transverse trolley installed above the slurry tank and capable of traveling longitudinally along the steel rails, a transverse track fixedly installed on the trolley, a machine base installed on the trolley and capable of traveling transversely along the track, an agitator fixedly installed on the machine base, and a drive unit installed on the trolley for driving the trolley to travel longitudinally and / or driving the machine base to travel transversely.

[0009] Furthermore, a transverse movable beam is fixedly installed on one side of the base, and an end plate is provided at the end of the movable beam away from the base; the drive unit includes a driven wheel rotatably connected to the base and independent first and second driving wheels respectively installed near both ends of one of the rails; the line connecting the first and second driving wheels and the line connecting the driven wheel and the end plate forms a cross shape, and the trolley is rotatably connected to four steering wheels near the center of the cross shape, and the center line connecting the four steering wheels forms a quadrilateral; a drive cable is provided on the end plate, one end of which is fixedly connected to the end plate, and the other end passes sequentially around one of the steering wheels, the first driving wheel, the second steering wheel, the driven wheel, the third steering wheel, the second driving wheel, and the fourth steering wheel before being fixedly connected to the end plate.

[0010] Furthermore, the first driving wheel is connected to a first motor, and the second driving wheel is connected to a second motor. The four steering wheels are arranged clockwise as steering wheel A, steering wheel B, steering wheel C, and steering wheel D. The drive cable passes sequentially around the inner side of steering wheel B, the outer side of the first driving wheel, the inner side of steering wheel A, the outer side of the driven wheel, the inner side of steering wheel D, the outer side of the second driving wheel, and the inner side of steering wheel C. When the first driving wheel and the second driving wheel rotate in the same direction at the same angular rate, the trolley travels longitudinally along the rail, and the machine base is relatively stationary with respect to the trolley. When the first driving wheel and the second driving wheel rotate in opposite directions at the same angular rate, the trolley stops running, and the machine base moves laterally along the rail.

[0011] Furthermore, a support cylinder is fixedly installed under the mounting plate of the agitator. The support cylinder is sleeved outside the drive shaft of the agitator. A support unit for supporting the lower part of the drive shaft is provided under the support cylinder. The support unit includes a water jacket fixedly installed at the bottom of the support cylinder. The water jacket is sleeved outside the drive shaft. There is a gap between the water jacket and the drive shaft. A connector is screwed onto the outside of the support cylinder. The connector is connected to a water pipe that communicates with the gap. The water pipe is connected to a water source.

[0012] Furthermore, the water jacket is embedded with a bearing bush, and the drive shaft is fitted with a bushing at the location of the bearing bush. The bushing bushing and the bearing bush are in clearance fit. The bearing bush is provided with a first water passage hole, which is connected to the connector.

[0013] Furthermore, a turntable fitted on the drive shaft is provided above and / or below the water jacket. The turntable is fixedly connected to the drive shaft. Blades are distributed along the circumferential direction on the side of the turntable near the water jacket. All blades are fixedly connected perpendicularly to the turntable. The blades and the water jacket are fitted with a clearance. Each blade is arranged radially along the turntable. The support cylinder is provided with a window at a position corresponding to the blade.

[0014] Furthermore, a compensation unit is provided between the end plate and the movable beam. The compensation unit includes a slide rod fixedly installed at the end of the movable beam away from the machine base and an adjusting nut threaded onto the slide rod. The end plate is slidably connected to the slide rod, and the adjusting nut is located between the end plate and the movable beam.

[0015] Furthermore, a spring is provided between the adjusting nut and the end plate, and the spring is sleeved on the slide rod.

[0016] Furthermore, the drive cable is one of a wire rope, a belt, or a chain.

[0017] The positive effects of this invention are:

[0018] 1. This invention includes a stirrer and a drive unit. When the stirrer is running, it agitates the slurry in the slurry tank to prevent sedimentation or accumulation. Driven by the drive unit, the impeller of the stirrer moves laterally, longitudinally, or obliquely within the slurry tank, agitating all corners of the tank and avoiding dead zones. The impeller of the stirrer can also be reduced in size, and the power of the motor can also be reduced. With a smaller impeller diameter, the agitation area is larger as the impeller moves, and the reduced motor power saves energy.

[0019] 2. The drive unit is equipped with a drive cable, a first drive wheel, a second drive wheel, a driven wheel, and a steering wheel. The lateral, longitudinal, and diagonal movement of the agitator can be controlled simply by controlling the rotation direction and angular rate of the first and second drive wheels, making control more convenient and simple.

[0020] 3. The present invention is provided with a compensation unit, which includes a slide rod, an adjusting nut and a spring. Tightening the adjusting nut can tighten the drive cable through the spring and compensate for the length change of the drive cable during use.

[0021] 4. The agitator is equipped with a support cylinder, which has a water jacket to support the lower part of the agitator's drive shaft, enhancing its stability. Water circulates through the water jacket, reducing wear on the drive shaft bushings and the inner bearings of the water jacket, thus extending their service life.

[0022] 5. A turntable with blades is mounted on the drive shaft. When the turntable rotates, a negative pressure is generated near the center, drawing water from the gap between the bearing and the bushing, ensuring water can pass smoothly through this gap. Additionally, it can block solid particles falling from the slurry above the water jacket, preventing them from entering the gap between the bearing and the bushing after the agitator stops, thus avoiding wear on the bearing and bushing when the agitator starts up again. Attached Figure Description

[0023] Figure 1 This is a top view of the present invention;

[0024] Figure 2 This is a schematic diagram of the crane and the machine base moving.

[0025] Figure 3 yes Figure 1 A sectional view of the BB section;

[0026] Figure 4 yes Figure 3 A magnified view of a section of the central I area;

[0027] In the picture:

[0028] 1. Crane; 2. Rail; 3. Notch; 4. Track; 5. Base; 6. Agitator; 7. Driven wheel; 8. Steering wheel A; 9. Slide seat; 10. Drive cable; 11. First driving wheel; 12. Steering wheel B; 13. End plate; 14. Compensation unit; 15. Steering wheel C; 16. Steering wheel D; 17. Second driving wheel; 18. Slurry tank; 19. Guide wheel; 20. Movable beam; 21. Adjusting nut; 22. Spring; 23. Slide rod; 24. Mounting plate; 25. Drive shaft; 26. Support cylinder; 27. Window; 28. Support unit; 29. ​​Cutter; 30. Turntable; 31. Blade; 32. Water jacket; 33. Water chamber; 34. First water passage hole; 35. Bushing; 36. Baffle; 37. Second water passage hole; 38. Joint; 39. Bearing shell; 40. Water pipe. Detailed Implementation

[0029] For ease of description, in the following description, the direction consistent with the laying of rail 2 is "longitudinal", and the direction consistent with track 4 is "transverse".

[0030] Example 1

[0031] like Figure 1 and 3 As shown, a slurry tank mixing device includes a pair of parallel longitudinal steel rails 2 laid on the ground on both sides of a slurry tank 18, both of which are fixed to the ground. A transverse trolley 1 is provided above the slurry tank 18. The trolley 1 is welded from profiles, with a rectangular slide 9 at its right end and a transverse notch 3 in its middle. Track wheels that can roll on the corresponding steel rails 2 are provided at the bottom of the left end of the trolley 1 and the right end of the slide 9. Transverse tracks 4 are laid on both sides of the notch 3 on the trolley 1, and the tracks 4 are fixedly connected to the trolley 1.

[0032] A rectangular base 5 is provided above the track 4. The inner side of the track 4 is a groove, and the bottom of the base 5 is provided with rollers for rolling in the grooves on the corresponding track 4. A stirrer 6 is installed on the base 5, and the drive shaft 25 of the stirrer 6 is located in the notch 3.

[0033] The present invention also includes a drive unit, which can drive the trolley 1 to move longitudinally and the base 5 to move laterally.

[0034] Combination Figure 2 As shown, a transverse movable beam 20 is fixedly installed on the right side of the base 5, and an end plate 13 is provided at the right end of the movable beam 20. The drive unit includes a driven wheel 7 rotatably connected to the right side of the top surface of the base 5. A first reducer and a second reducer, respectively fixedly installed on the ground near both ends of the right-side rail 2, are respectively installed. The output shaft of the first reducer is connected to a first driving wheel 11, and the input shaft of the first reducer is connected to a first motor; the output shaft of the second reducer is connected to a second driving wheel 17, and the input shaft of the second reducer is connected to a second motor.

[0035] The line connecting the first driving wheel 11 and the second driving wheel 17, and the line connecting the driven wheel 7 and the end plate 13, form a cross shape. The slide 9 rotatably connects four steering wheels near the center of this cross shape. The center line connecting the four steering wheels forms a quadrilateral. The four steering wheels, in a clockwise direction, are steering wheel A 8, steering wheel B 12, steering wheel C 15, and steering wheel D 16. The end plate 13 is provided with a drive cable 10. One end of the drive cable 10 is fixedly connected to one end of the end plate 13, and the other end passes sequentially around the inner side of steering wheel B 12, the outer side of the first driving wheel 11, the inner side of steering wheel A 8, the outer side of the driven wheel 7, the inner side of steering wheel D 16, the outer side of the second driving wheel 17, and the inner side of steering wheel C 15 before being fixedly connected to the other end of the end plate 13. The slide 9 is provided with guide wheels 19 on both sides of the movable beam 20. The movable beam 20 is sandwiched between two guide wheels 19 to prevent deviation during lateral movement. The drive cable 10 can be a belt, or it can be a wire rope or a chain.

[0036] When the first drive wheel 11 and the second drive wheel 17 rotate at the same angular rate and in the same direction, the traveling carriage 1 travels longitudinally along the rail 2. For example, when the first drive wheel 11 and the second drive wheel 17 rotate at the same angular rate in a clockwise direction, since both ends of the drive cable 10 are fixedly connected to the end plate 13, the drive cable 10 on the right side of the first drive wheel 11 becomes longer, and the drive cable 10 on the right side of the second drive wheel 11 becomes shorter, causing the traveling carriage 1 to move towards the first drive wheel 11. Since the change in length of the drive cable 10 on the right side of the first drive wheel 11 is equal to the change in length of the drive cable 10 on the right side of the second drive wheel 11, the base 5 remains relatively stationary with respect to the traveling carriage 1.

[0037] When the first drive wheel 11 and the second drive wheel 17 rotate in opposite directions at the same angular rate, the traveling carriage 1 stops running, and the base 5 moves laterally along the track 4. For example, when the first drive wheel 11 rotates clockwise and the second drive wheel 17 rotates counterclockwise at the same angular rate, the drive cables 10 on the right side of the first drive wheel 11 and the right side of the second drive wheel 11 lengthen by the same amount of change. At this time, the traveling carriage 1 is stationary, and the base 5 moves to the right under the pull of the drive cables 10.

[0038] When the first drive wheel 11 and the second drive wheel 17 rotate in the same direction at different angular rates or in different directions at different angular rates, the machine base 5 moves obliquely above the slurry pool 18.

[0039] When the agitator 6 is running, it stirs the slurry in the slurry tank 18 to prevent the slurry from settling or accumulating. Driven by the drive unit, the impeller of the agitator 6 moves horizontally, longitudinally or obliquely in the slurry tank 18 to stir each corner of the slurry tank 18 and avoid the formation of dead corners.

[0040] In addition, the impeller of mixer 6 can be reduced in size, and the power of the motor can also be reduced. With a smaller impeller diameter, the mixing area is larger as the impeller moves, and the reduced motor power saves energy.

[0041] Both the first and second motors of the drive unit are mounted on the ground next to the slurry tank 18, making operation and maintenance more convenient. The movement of the agitator 6 can be controlled solely by the rotation of the first and second motors, making control more convenient and simple.

[0042] Example 2

[0043] like Figure 3 and Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that:

[0044] A support cylinder 26 is fixedly installed below the mounting plate 24 of the agitator 6. The support cylinder 26 is sleeved around the drive shaft 25 of the agitator 6. A support unit 28 for supporting the lower part of the drive shaft 25 is provided below the support cylinder 26. The support unit 28 includes an annular water sleeve 32 fixedly installed at the bottom of the support cylinder 26. The water sleeve 32 is sleeved around the drive shaft 25 and is located at the lower part of the drive shaft 25. There is a gap between the water sleeve 32 and the drive shaft 25. An annular water chamber 33 is provided inside the water sleeve 32 and communicates with the gap. A connector 38 is screwed onto the outside of the support cylinder 26. The connector 38 communicates with the water chamber 33 through a second water passage 37 on the water sleeve 32. A water pipe 40 communicating with the water chamber 33 is connected to the connector 38. The water pipe 40 passes upward through the mounting plate 24 of the agitator 6 and communicates with a water source.

[0045] The water jacket 32 ​​is embedded with a bearing shell 39. There is a gap between the bearing shell 39 and the drive shaft 25. The drive shaft 25 is fixedly provided with a bushing 35 at the position of the bearing shell 39. There is a gap between the bushing 35 and the bearing shell 39. The bearing shell 39 is provided with a first water passage hole 33. The water chamber 33 is connected to the gap through the first water passage hole 33. The bottom of the water jacket 32 ​​is fixedly connected with a baffle 36 by screws for axial positioning of the bearing shell 39.

[0046] Because the drive shaft 25 of the agitator 6 is relatively long, if the agitator 6 moves, the drive shaft 25 will shake, causing it to bend and damaging or shortening the lifespan of the bearings. The lower part of the drive shaft 25 is supplemented with support cylinder 26 and support unit 28 to prevent shaking, thus avoiding bending and shortening the bearing life, and extending the service life of the agitator 6. Water from water pipe 40 passes sequentially through the connector, the second water passage 37, the water chamber 33, and the first water passage 33 before entering the gap between the bushing 35 and the bearing shell 39. This prevents solid particles in the slurry from entering this gap, avoiding wear on the bushing 35 and the bearing shell 39 by solid particles, and also provides cooling and lubrication for the bushing 35 and the bearing shell 39.

[0047] The lower end of the drive shaft 25 is also equipped with a cutter 29, which can break up the blocky sludge even if silt accumulates at the bottom of the slurry tank 18, and then reform it into slurry by stirring.

[0048] Example 3

[0049] like Figure 3 and Figure 4 As shown, the difference between this embodiment and Embodiment 2 is that:

[0050] Both the upper part of the water jacket 32 ​​and the lower part of the baffle 36 are provided with circular turntables 30 fitted onto the drive shaft 25. The turntables 30 and the drive shaft 25 are fixedly connected by set screws screwed onto the hub of the turntables 30. On the side of the turntables 30 near the water jacket 32, blades 31 are distributed circumferentially. Each blade 31 is welded perpendicularly to the turntable 30. There is a clearance fit between the blades 31 and the water jacket 32, and between the blades 31 and the baffle 36. Each blade 31 is radially arranged along the turntable 30. The wall of the support cylinder 26 has windows 27 at positions corresponding to the blades 31.

[0051] When the blade 31 rotates, it drives the water flow between the turntable 30 and the water jacket 32 ​​to rotate, generating negative pressure near the center of the turntable 30. This negative pressure draws water from the gap between the bearing bush 39 and the bushing 35, ensuring that water can pass smoothly through this gap. Even if the water pressure is insufficient, it ensures normal water flow in this gap and normal lubrication of the bearing bush 39 and the bushing 35. The upper turntable 30 also blocks solid particles falling from the slurry above it, preventing solid particles from entering the gap between the bearing bush 39 and the bushing 35 after the agitator 6 stops, thus preventing wear on the bearing bush 39 and the bushing 35 when the agitator 6 starts.

[0052] Example 4

[0053] like Figure 1 and Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that:

[0054] A compensation unit 14 is provided between the end plate 13 and the movable beam 20. The compensation unit 14 includes a slide rod 23 fixedly mounted on the right end of the movable beam 20 and an adjusting nut 21 threadedly connected to the slide rod 23. The end plate 13 is slidably connected to the slide rod 23. The adjusting nut 21 is located between the end plate 13 and the movable beam 20. A blocking plate for axially limiting the end plate 13 is welded to the right end of the slide rod 23. A spring 22 is provided between the adjusting nut 21 and the end plate 13, and the spring 22 is sleeved on the slide rod 23.

[0055] Tightening the adjusting nut 21 can tighten the drive cable 10 via the spring 22 and compensate for changes in the length of the drive cable 10 during use.

[0056] The above-described embodiments are detailed and specific, illustrating preferred embodiments of the present invention. They are only used to illustrate the technical ideas and features of the present invention, aiming to enable those skilled in the art to understand and implement the invention. However, they are not limited to the present invention, and the patent scope of the present invention should not be limited to these embodiments. Any equivalent changes or modifications made to the spirit disclosed in the present invention, without departing from the structure of the present invention, such as local improvements within the system and alterations or transformations between subsystems, are still within the patent scope of the present invention. Currently, the technical solution of this application has undergone pilot testing, i.e., small-scale experiments before large-scale mass production. After the pilot testing, user surveys were conducted on a small scale, and the survey results showed high user satisfaction. Preparations are now underway for the formal production and industrialization of the product, including intellectual property risk warning surveys.

Claims

1. A slurry tank mixing device, characterized in that, It includes longitudinal steel rails (2) fixedly installed on both sides of the slurry tank (18), a transverse trolley (1) installed above the slurry tank (18) that can travel longitudinally along the steel rails (2), a transverse track (4) fixedly installed on the trolley (1), a machine base (5) installed on the trolley (1) that can travel transversely along the track (4), an agitator (6) fixedly installed on the machine base (5), and a drive unit installed on the trolley (1) for driving the trolley (1) to travel longitudinally and / or driving the machine base (5) to travel transversely; A support cylinder (26) is fixedly installed under the mounting plate (24) of the stirrer (6). The support cylinder (26) is sleeved on the drive shaft (25) of the stirrer (6). A support unit (28) for supporting the lower part of the drive shaft (25) is provided under the support cylinder (26). The support unit (28) includes a water jacket (32) fixedly installed at the bottom of the support cylinder (26). The water jacket (32) is sleeved on the drive shaft (25). There is a gap between the water jacket (32) and the drive shaft (25). A connector (38) is screwed onto the outside of the support cylinder (26). The connector (38) is connected to a water pipe that communicates with the gap. The water pipe is connected to a water source. The water jacket (32) is fitted with a bearing shell (39), and the drive shaft (25) is fitted with a bushing (35) at the position of the bearing shell (39). The bushing (35) and the bearing shell (39) are in clearance fit. The bearing shell (39) is provided with a first water passage hole (33), and the first water passage hole (33) is connected to the connector (38). A turntable (30) is provided above and / or below the water jacket (32) and mounted on the drive shaft (25). The turntable (30) is fixedly connected to the drive shaft (25). On the side of the turntable (30) near the water jacket (32), blades (31) are distributed along the circumferential direction. All blades (31) are fixedly connected to the turntable (30) perpendicularly. The blades (31) and the water jacket (32) are fitted with a clearance. Each blade (31) is arranged radially along the turntable (30). The support cylinder (26) has a window (27) at a position corresponding to the blade (31). When the blade (31) rotates, the blade (31) drives the water flow between the turntable (30) and the water jacket (32) to rotate. A negative pressure is generated at the position of the turntable (30) near the center, which draws water from the gap between the bearing (39) and the bushing (35).

2. The slurry tank stirring device according to claim 1, characterized in that, A transverse movable beam (20) is fixedly provided on one side of the base (5), and an end plate (13) is provided at the end of the movable beam (20) away from the base (5); the drive unit includes a driven wheel (7) rotatably connected to the base (5) and a first driving wheel (11) and a second driving wheel (17) respectively provided on one of the rails (2) near both ends; the line connecting the first driving wheel (11) and the second driving wheel (17) and the line connecting the driven wheel (7) and the end plate (13) form a cross shape, and the trolley (1) is rotatably connected to four steering wheels near the center of the cross shape, and the center line connecting the four steering wheels forms a quadrilateral. A drive cable (10) is provided on the end plate (13), one end of the drive cable (10) is fixedly connected to the end plate (13), and the other end passes through one of the steering wheels, the first driving wheel (11), the second steering wheel, the driven wheel (7), the third steering wheel, the second driving wheel (17) and the fourth steering wheel in sequence before being fixedly connected to the end plate (13).

3. The slurry tank stirring device according to claim 2, characterized in that, The first driving wheel (11) is connected to the first motor, and the second driving wheel (17) is connected to the second motor. The four steering wheels are, in clockwise order, steering wheel A (8), steering wheel B (12), steering wheel C (15), and steering wheel D (16). The drive cable (10) passes around the inner side of steering wheel B (12), the outer side of the first driving wheel (11), the inner side of steering wheel A (8), the outer side of the driven wheel (7), the inner side of steering wheel D (16), the outer side of the second driving wheel (17), and the inner side of steering wheel C (15) in sequence. When the first driving wheel (11) and the second driving wheel (17) rotate in the same direction at the same angular rate, the trolley (1) travels longitudinally along the rail (2), and the machine base (5) is relatively stationary with respect to the trolley (1). When the first driving wheel (11) and the second driving wheel (17) rotate in opposite directions at the same angular rate, the trolley (1) stops running, and the machine base (5) moves laterally along the track (4).

4. A slurry tank stirring device according to claim 2, characterized in that, A compensation unit (14) is provided between the end plate (13) and the movable beam (20). The compensation unit (14) includes a slide rod (23) fixedly installed at the end of the movable beam (20) away from the base (5) and an adjusting nut (21) threadedly connected to the slide rod (23). The end plate (13) is slidably connected to the slide rod (23), and the adjusting nut (21) is provided between the end plate (13) and the movable beam (20).

5. A slurry tank mixing device according to claim 4, characterized in that, A spring (22) is provided between the adjusting nut (21) and the end plate (13), and the spring (22) is sleeved on the slide rod (23).

6. A slurry tank stirring device according to claim 2, characterized in that, The drive cable (10) is one of the following: wire rope, belt, or chain.

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