A mixer for a sludge storage tank

Abstract

The utility model relates to the technical field of stirring, disclose a stirring machine for sludge storage pool, including crossbeam and base, the downside fixed mounting of crossbeam has electric jar, the push rod end of electric jar penetrates crossbeam and is fixedly installed with motor upwards, the output of motor is fixedly installed with transmission shaft, the lower extreme of transmission shaft penetrates crossbeam and is fixedly installed with upper cylinder, the inside rotation of base is installed with lower cylinder, the circumference side of upper cylinder and lower cylinder is evenly installed with stirring subassembly. In the utility model, when upper cylinder and lower cylinder are close to each other, isosceles trapezoid tends to be flat, is beneficial to the large -area stirring of pool bottom sludge, when being far from each other, isosceles trapezoid tends to be narrow and high, is beneficial to the overall stirring of pool center sludge, can under the premise of low revolution, according to the flexible adjustment stirring area of different operation in sludge storage pool, solved the limitation of the fixed area stirring of existing stirring machine.

Description

Technical Field

[0001] This utility model relates to the field of mixing technology, specifically a mixer for sludge storage tanks. Background Technology

[0002] Sludge storage tanks are key facilities in wastewater treatment systems used for temporary storage, concentration, and conditioning of sludge. The mixers used are usually submersible mixers or propeller mixers. Their core function is to maintain the sludge in suspension, promote uniform mixing, and prevent sedimentation. The mixing speed is relatively low (generally 10-100 rpm) to ensure a small turbulent area and gentle and uniform mixing, thereby avoiding damage to the flocculent structure and bacterial flocs of activated sludge.

[0003] Sludge storage tanks have the ability to temporarily store and buffer sludge, preventing equipment from overloading due to sudden changes in sludge volume; they also have the ability to homogenize and adjust sludge to mix sludge produced in different stages (such as primary sludge and residual activated sludge), making the sludge properties uniform and stable, and avoiding the impact of compositional differences on dewatering effect.

[0004] Therefore, existing mixers, which use a rotating stirring rod or propeller in a fixed area to complete the mixing process, have limitations and cannot flexibly adapt to different operating conditions in sludge storage tanks at low speeds.

[0005] To address the aforementioned issues, a mixer for sludge storage tanks is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a mixer for sludge storage tanks, which can flexibly adjust the mixing area to adapt to different operating conditions in the sludge storage tank, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a mixer for a sludge storage tank, comprising a crossbeam and a base, an electric cylinder fixedly installed on the lower side of the crossbeam, a motor fixedly installed on the push rod end of the electric cylinder passing upward through the crossbeam, a drive shaft fixedly installed on the output end of the motor, an upper cylinder fixedly installed on the lower end of the drive shaft passing through the crossbeam, and a lower cylinder rotatably installed inside the base, with mixing components evenly installed on the circumference of the upper and lower cylinders.

[0008] Specifically, the number of stirring components is 2 to 4, which are evenly distributed in a circle.

[0009] Specifically, the stirring assembly includes a first connecting rod, a second connecting rod, and blade components. The second connecting rod is vertically arranged and evenly distributed around the drive shaft. One end of the first connecting rod is rotatably mounted on both ends of the second connecting rod via a rotating joint. The other end of the first connecting rod is rotatably assembled with the upper cylinder and the lower cylinder via a rotating joint, respectively. Blade components are mounted on both the first and second connecting rods.

[0010] Furthermore, the second and first connecting rods in each of the stirring components are arranged in an isosceles trapezoidal shape.

[0011] Specifically, the blade component includes a sleeve and an arc-shaped blade. The sleeve is installed on the second connecting rod and the first connecting rod by means of bolt assembly, and the arc-shaped blade is radially fixedly installed on the sleeve.

[0012] Specifically, a splined shaft is fixedly installed on the lower side of the upper cylinder, and a splined groove is opened inside the lower cylinder. The splined shaft is inserted and assembled with the splined groove.

[0013] Furthermore, a folding protective cover is fixedly installed between the upper cylinder and the lower cylinder, and the spline shaft is located inside the folding protective cover.

[0014] Specifically, a linear bearing is installed at the center of the crossbeam, and the drive shaft is slidably assembled inside the linear bearing.

[0015] Compared with the prior art, the beneficial effects of this utility model are: By adjusting the electric cylinder lifting motor and the drive shaft, the distance between the upper and lower cylinders can be changed, altering the shape of the isosceles trapezoid formed by the first and second connecting rods in the mixing assembly. This, in turn, adjusts the position of all blade components. When the upper and lower cylinders are close to each other, the isosceles trapezoid tends to be flat, which is beneficial for large-area mixing of sludge at the bottom of the tank; when they are far apart, the isosceles trapezoid tends to be narrow and tall, which is beneficial for overall mixing of sludge in the center of the tank. This allows for flexible adjustment of the mixing area according to different operating conditions in the sludge storage tank at low speeds, overcoming the limitations of fixed-area mixing in existing mixers. Attached Figure Description

[0016] Figure 1 This is a schematic front view of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the stirring assembly of this utility model; Figure 3 This is a structural schematic diagram of the blade component of this utility model.

[0017] In the diagram: 1. Crossbeam, 2. Motor, 3. Electric cylinder, 4. Stirring assembly, 41. First connecting rod, 42. Second connecting rod, 43. Blade assembly, 431. Sleeve, 432. Arc blade, 5. Splined shaft, 6. Base, 7. Lower cylinder, 8. Upper cylinder, 9. Drive shaft, 10. Folding protective cover, 11. Linear bearing. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 This utility model provides a mixer for sludge storage tank, including a crossbeam 1 and a base 6. The two ends of the crossbeam 1 can be installed on the side wall of the sludge storage tank by expansion bolts, and the base 6 can be installed on the bottom of the sludge storage tank by expansion bolts.

[0020] An electric cylinder 3 is fixedly installed on the lower side of the crossbeam 1. The push rod end of the electric cylinder 3 passes through the crossbeam 1 and is fixedly installed with a motor 2. The output end of the motor 2 is fixedly installed with a drive shaft 9. The lower end of the drive shaft 9 passes through the crossbeam 1 and is fixedly installed with an upper cylinder 8. A lower cylinder 7 is rotatably installed inside the base 6. A stirring assembly 4 is evenly installed on the circumference of the upper cylinder 8 and the lower cylinder 7.

[0021] The electric cylinder 3 and the motor 2 are vertically arranged, and the crossbeam 1 has a through hole for the push rod and the transmission shaft 9 to pass through. The electric cylinder 3 is used to lift the motor 2. After being driven by the transmission shaft 9, it can change the distance between the upper cylinder 8 and the lower cylinder 7, thereby adjusting the posture of the stirring component 4. After the motor 2 rotates the transmission shaft 9, it can rotate the stirring component 4 and the lower cylinder 7 to perform stirring operations.

[0022] Specifically: The number of stirring components 4 is 2 to 4 evenly distributed in a circle. As long as the torque provided by the motor 2 can ensure that the stirring components 4 rotate in the sludge, the more stirring components 4 there are, the better the stirring effect. The number should be set reasonably according to the viscosity of the sludge.

[0023] Please see Figure 2 The stirring assembly 4 includes a first connecting rod 41, a second connecting rod 42, and a blade component 43. The second connecting rod 42 is vertically arranged and evenly distributed around the drive shaft 9. Both ends of the second connecting rod 42 are rotatably mounted with one end of the first connecting rod 41 via a rotating joint. The other end of the first connecting rod 41 is rotatably assembled with the upper cylinder 8 and the lower cylinder 7 via a rotating joint, respectively. Blade components 43 are mounted on both the first connecting rod 41 and the second connecting rod 42.

[0024] The rotating joint is an existing component consisting of two rotating seats connected by pins. In each stirring assembly 4, the second connecting rod 42 and the first connecting rod 41 are distributed in an isosceles trapezoidal shape. When the distance between the upper cylinder 8 and the lower cylinder 7 changes, the distance between the ends of each pair of first connecting rods 41 near the drive shaft 9 also changes, changing the shape of the isosceles trapezoid. That is, not only will the inclination angle of the first connecting rod 41 change, but the distance between the second connecting rod 42 and the drive shaft 9 will also change, causing the position of all blade components 43 to change as well.

[0025] When the upper cylinder 8 and the lower cylinder 7 are close to each other, the isosceles trapezoid tends to be flat, which is more conducive to the large-area stirring of sludge at the bottom of the sludge storage tank. When the upper cylinder 8 and the lower cylinder 7 are far apart, the isosceles trapezoid tends to be narrow and tall, which is more conducive to the overall stirring of sludge in the center of the sludge storage tank. It can be flexibly adjusted according to the usage requirements.

[0026] Please see Figure 3 The blade component 43 includes a sleeve 431 and an arc-shaped blade 432. The sleeve 431 is installed on the second connecting rod 42 and the first connecting rod 41 by means of bolt assembly. The arc-shaped blade 432 is radially fixedly installed on the sleeve 431.

[0027] The bolt assembly mainly includes bolts, nuts, and washers. Correspondingly, the second connecting rod 42, the first connecting rod 41, and the sleeve 431 are provided with through holes along the radial direction for the bolt assembly to pass through. The bolt assembly connection method facilitates the installation, disassembly, and replacement of the blade component 43.

[0028] In addition, a splined shaft 5 is fixedly installed on the lower side of the upper cylinder 8, and a splined groove is opened inside the lower cylinder 7. The splined shaft 5 is inserted into the splined groove for torque transmission, ensuring that the lower cylinder 7 can rotate with the upper cylinder 8 without affecting the distance adjustment between the lower cylinder 7 and the upper cylinder 8.

[0029] A folding protective cover 10 is fixedly installed between the upper cylinder 8 and the lower cylinder 7. The spline shaft 5 is located inside the folding protective cover 10. The folding protective cover 10 is used to isolate the external sludge environment and avoid affecting the spline shaft 5 and the spline groove insertion operation.

[0030] A linear bearing 11 is installed at the center of the crossbeam 1, and the drive shaft 9 is slidably assembled in the linear bearing 11. The linear bearing 11 is used to assist in supporting the drive shaft 9, and the drive shaft 9 can rotate or move up and down in the linear bearing 11.

[0031] Working principle: After installing this device, make electrical connections between the electric cylinder 3, the motor 2 and the main power distribution cabinet for sludge treatment (which mainly includes various control components and instruments, such as programmable logic controllers, buttons, indicator lights, touch screens, etc.).

[0032] The extension and retraction of the electric cylinder 3 can be adjusted according to the condition of the sludge in the sludge storage tank. For example, when buffering sludge, if the amount of sludge is unstable, the need for sludge stirring is at the bottom of the sludge storage tank. Therefore, the electric cylinder 3 can be used to move the motor 2 and the drive shaft 9 down, reducing the distance between the upper cylinder 8 and the lower cylinder 7, and adjusting the posture of the stirring component 4 to the area near the bottom. After being driven by the drive shaft 9, the upper cylinder 8 and the lower cylinder 7, the motor 2 can rotate the stirring component 4, which can effectively prevent sedimentation. When mixing sludge produced in different stages, the amount of sludge is relatively stable due to the stable input and output environment. At this time, the electric cylinder 3 can be used to move the motor 2 and the transmission shaft 9 upward, increasing the distance between the upper cylinder 8 and the lower cylinder 7, and adjusting the posture of the stirring component 4 to a region closer to the center. At this time, the rotating stirring component 4 is more conducive to mixing.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mixer for sludge storage tanks, characterized in that: The device includes a crossbeam (1) and a base (6). An electric cylinder (3) is fixedly installed on the lower side of the crossbeam (1). The push rod end of the electric cylinder (3) passes through the crossbeam (1) upward and is fixedly installed with a motor (2). A transmission shaft (9) is fixedly installed at the output end of the motor (2). The lower end of the transmission shaft (9) passes through the crossbeam (1) and is fixedly installed with an upper cylinder (8). A lower cylinder (7) is rotatably installed inside the base (6). A stirring assembly (4) is evenly installed on the circumference of the upper cylinder (8) and the lower cylinder (7).

2. The mixer for a sludge storage tank according to claim 1, characterized in that: The number of stirring components (4) is 2 to 4, which are evenly distributed in a circle.

3. A mixer for a sludge storage tank according to claim 1, characterized in that: The stirring assembly (4) includes a first connecting rod (41), a second connecting rod (42), and a blade component (43). The second connecting rod (42) is vertically arranged and evenly distributed around the drive shaft (9). Both ends of the second connecting rod (42) are rotatably mounted with one end of the first connecting rod (41) via a rotating joint. The other end of the first connecting rod (41) is rotatably assembled with the upper cylinder (8) and the lower cylinder (7) via a rotating joint. Blade components (43) are mounted on both the first connecting rod (41) and the second connecting rod (42).

4. A mixer for a sludge storage tank according to claim 3, characterized in that: The second link (42) and the first link (41) in each of the stirring components (4) are arranged in an isosceles trapezoidal shape.

5. A mixer for a sludge storage tank according to claim 3, characterized in that: The blade component (43) includes a sleeve (431) and an arc-shaped blade (432). The sleeve (431) is installed on the second connecting rod (42) and the first connecting rod (41) by means of bolt assembly. The arc-shaped blade (432) is fixedly installed radially on the sleeve (431).

6. A mixer for a sludge storage tank according to claim 1, characterized in that: A spline shaft (5) is fixedly installed on the lower side of the upper cylinder (8), and a spline groove is opened inside the lower cylinder (7). The spline shaft (5) is inserted into the spline groove for assembly.

7. A mixer for a sludge storage tank according to claim 6, characterized in that: A folding protective cover (10) is fixedly installed between the upper cylinder (8) and the lower cylinder (7), and the spline shaft (5) is located inside the folding protective cover (10).

8. A mixer for a sludge storage tank according to claim 1, characterized in that: A linear bearing (11) is installed at the center of the crossbeam (1), and the drive shaft (9) is slidably assembled inside the linear bearing (11).

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