Novel thickener bottom stirring device
By installing a protective plate at the bottom of the thickener and improving the transmission method, the problem of packing seal leakage was solved, the speed reducer was protected and production was stabilized, and the maintenance difficulty and cost were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-03-17
AI Technical Summary
In the existing thickener's down-drive stirring device, leakage of the packing seal causes the medium to drip into the integrated reducer, resulting in equipment damage and production instability. Cleaning is difficult and affects stable production operation.
First and second protective plates are installed at the bottom of the thickener to guide the leaked medium to the outside of the cone bottom chamber and discharge it through the overflow port. At the same time, the upper stirring shaft and the output shaft of the integrated reducer are connected by chain drive to avoid the medium from directly contacting the reducer.
It effectively prevents damage to the speed reducer caused by media leakage, reduces equipment maintenance costs and the risk of production interruption, and improves production stability.
Smart Images
Figure CN223995473U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of solid-liquid phase separation technology, and in particular to a novel bottom stirring device for a thickener. Background Technology
[0002] A thickener is a settling device used to concentrate solid particles in a suspension. It comes in various shapes, including conical, cylindrical, and square, and multi-layered designs are also available for specific needs. Large thickeners are often cylindrical with a conical bottom. The suspension flows in from a central feed trough, while the clarified liquid overflows from the periphery and is discharged through an outlet trough. The thickener contains slowly moving rakes that collect sediment or sludge towards the center of the bottom, where it is discharged through a discharge pipe. The agitator in the thickener has two drive methods: top-driven and bottom-driven. Currently, top-driven pipelines are difficult to lay, so bottom-driven is used. The bottom-driven device uses a packing seal, and the agitator shaft is directly connected to the output shaft of the integrated reducer via a coupling. During operation, the packing seal inevitably leaks media. If operators fail to detect and eliminate the leak in time, the leaked media will flow into the integrated reducer, causing damage and agitation failure. Reducing the fluidity of the media inside the equipment can cause the thickener to become stuck, making cleaning extremely difficult. If the leaked media from the packing seal is not addressed, it will seriously affect stable production operation. Utility Model Content
[0003] This utility model provides a novel bottom stirring device for a thickener to overcome the shortcomings of the prior art. By setting a first protective plate and a second protective plate below the stuffing box, the leaked medium is guided to the outside of the protective plate. Furthermore, the original integrated stirring shaft and reducer are replaced with an external chain drive, which avoids damage to the reducer caused by leakage of the packing sealing medium.
[0004] According to the present invention, a novel bottom stirring device for a thickener is provided below the bottom of the thickener. An upper stirring shaft is rotatably connected to the bottom surface of the thickener through a stuffing box. A stuffing cover is bolted to the stuffing box. The stuffing cover matches the stuffing box. The stuffing box and the upper stirring shaft are filled with stuffing. An impeller is provided at one end of the upper stirring shaft inside the thickener.
[0005] The transmission method between the upper stirring shaft and the output shaft of the integrated reducer is chain drive;
[0006] The first protective plate is disposed on the bottom surface of the cone-shaped chamber, and the first protective plate forms a closed shape on the bottom surface of the cone-shaped chamber;
[0007] The second protective plate is disposed on the upper stirring shaft, and the edge of the second protective plate is outside the first protective plate;
[0008] An overflow port is located in the cone-bottom chamber, on the outside of the first protective plate, and below the top of the first protective plate.
[0009] In one embodiment, a coupling and a lower stirring shaft are further included, the lower stirring shaft being coaxial with the upper stirring shaft and connected to the upper stirring shaft via the coupling.
[0010] Furthermore, it also includes a bearing chamber, through which the lower stirring shaft is rotatably connected to the bottom of the conical bottom chamber.
[0011] Furthermore, it also includes sprockets and chains. The output shaft of the integrated lower stirring shaft and the reducer is equipped with sprockets. The sprockets are connected to the output shaft of the integrated lower stirring shaft and the reducer through matching protrusions and grooves. The protruding teeth of the sprockets match the grooves of the chain.
[0012] Furthermore, the lower stirring shaft and the output shaft of the integrated reducer are driven by two or more sets of sprockets and chains arranged in parallel.
[0013] Furthermore, the sprocket and chain are provided with a housing.
[0014] Compared with the prior art, the advantages of this utility model are as follows:
[0015] (1) A first protective plate, a second protective plate and an overflow port are added inside the cone bottom chamber. The second protective plate guides the leaked medium to the bottom of the cone bottom chamber, which is away from the stirring shaft. The first protective plate isolates and seals this part of the medium. Finally, the leaked medium is discharged through the overflow port.
[0016] (2) The transmission method between the upper stirring shaft and the output shaft of the integrated reducer is changed to chain drive, so that the two shafts are not in the same vertical direction, thus avoiding the integrated reducer from receiving the leaked medium. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model.
[0018] In the diagram: 1. Agitator impeller; 2. Stuffing box; 3. Stuffing gland; 4. Coupling; 5. First protective plate; 6. Second protective plate; 7. Upper agitator shaft; 8. Overflow port; 9. Lower agitator shaft; 10. Sprocket; 11. Chain; 12. Integrated reducer; 13. Bearing chamber; 14. Conical bottom chamber. Detailed Implementation
[0019] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0020] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0021] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.
[0022] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0023] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0024] See Figure 1 , Figure 1 The diagram shows a structural schematic of one embodiment of this application. One embodiment of this application provides a novel bottom stirring device for a thickener. A conical bottom chamber 14 is provided below the bottom of the thickener. The upper stirring shaft 7 is rotatably connected to the bottom surface of the thickener through a stuffing box 2. The stuffing cover 3 is bolted to the stuffing box 2. The stuffing cover 3 matches the stuffing box 2. The stuffing box 2 and the upper stirring shaft 7 are filled with packing. The stuffing cover 3 squeezes the packing. An impeller 1 is provided at one end of the upper stirring shaft 7 inside the thickener.
[0025] The transmission method between the upper stirring shaft 7 and the output shaft of the integrated reducer 12 is chain drive.
[0026] The first protective plate 5 is disposed on the bottom surface of the cone-shaped bottom chamber 14, forming a closed shape on the bottom surface of the cone-shaped bottom chamber 14. Specifically, this closed shape is circular.
[0027] The second protective plate 6 is disposed on the upper stirring shaft 7, and the edge of the second protective plate 6 is outside the first protective plate 5. Specifically, for ease of processing, the second protective plate 6 is a rotating body coaxial with the upper stirring shaft 7, extending horizontally from the upper stirring shaft 7 and then vertically downward, with the edge of the second protective plate 6 lower than the top of the first protective plate 5.
[0028] The overflow port 8 is located at the bottom of the cone-bottom chamber 14, and the overflow port 8 is located on the outside of the first protective plate 5.
[0029] In this embodiment, a coupling 4 and a lower stirring shaft 9 are also included. The lower stirring shaft 9 is coaxial with the upper stirring shaft 7 and is connected to the upper stirring shaft 7 via the coupling 4.
[0030] Furthermore, it also includes a bearing chamber 13, through which the lower stirring shaft 9 and the bottom of the conical bottom chamber 14 are rotatably connected. Specifically, a bearing is provided in the bearing chamber 13, and the lower stirring shaft 9 and the conical bottom chamber 14 are rotatably connected through the bearing.
[0031] Furthermore, it also includes a sprocket 10 and a chain 11. The output shafts of the lower stirring shaft 9 and the integrated reducer 12 are both equipped with sprockets 10. The sprocket 10 is connected to the output shaft of the lower stirring shaft 9 and the integrated reducer 12 through matching protrusions and grooves. The protruding teeth of the sprocket 10 match the grooves of the chain 11.
[0032] Furthermore, the output shaft of the lower stirring shaft 9 and the integrated reducer 12 are driven by two sets of sprockets 10 and chains 11 arranged in parallel.
[0033] Furthermore, the sprocket 10 and chain 11 are provided with housings. Specifically, the housings are used to protect the safety of the operators and to prevent the equipment from being damaged by external forces.
[0034] When using this device:
[0035] (1) When the reducer integrated machine 12 starts, its output shaft outputs power, which is transmitted to the lower stirring shaft 9 through the sprocket 10 and chain 11. The lower stirring shaft 9 is connected to the upper stirring shaft 7 through the coupling 4, which ultimately drives the upper stirring shaft 7 and the stirring impeller 1 to rotate and stir in the thickener.
[0036] (2) The packing seal cannot prevent the medium from flowing out. The leaked medium is guided by the second protective plate 6, flows into the outside of the first protective plate 5, is blocked by the first protective plate 5, and is finally discharged through the overflow port 8.
[0037] (3) When the packing fails and leaks a lot, the medium breaks through the first protective plate 5 and enters the bearing chamber 13, damaging only the bearing with lower spare parts cost, thereby avoiding damage to the important spare parts, the integrated reducer 12.
[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0039] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A new type of thickener bottom stirring device, a conical bottom chamber is arranged below the bottom of the thickener, an upper stirring shaft is rotatably connected with the bottom surface of the thickener through a stuffing box, a stuffing gland is connected with the stuffing box through bolts, the stuffing gland is matched with the stuffing box, the stuffing box is filled with stuffing between the stuffing box and the upper stirring shaft, an impeller is arranged at one end of the upper stirring shaft inside the thickener, characterized in that: the transmission mode between the upper stirring shaft and the output shaft of the speed reducer integrated machine is chain transmission; a first protective plate is arranged on the bottom surface of the conical bottom chamber, the first protective plate forms a closed pattern on the bottom surface of the conical bottom chamber; a second protective plate is arranged on the upper stirring shaft, the edge of the second protective plate is outside the first protective plate; an overflow port is arranged on the conical bottom chamber, the overflow port is outside the first protective plate, and the overflow port is lower than the top end of the first protective plate. Further comprising a shaft coupling and a lower stirring shaft, the lower stirring shaft is coaxial with the upper stirring shaft, and the lower stirring shaft is connected with the upper stirring shaft through the shaft coupling. Further comprising a bearing chamber, the lower stirring shaft is rotatably connected with the bottom of the conical bottom chamber through the bearing chamber. Further comprising a sprocket and a chain, the lower stirring shaft and the output shaft of the speed reducer integrated machine are both provided with the sprocket, the sprocket is connected with the lower stirring shaft and the output shaft of the speed reducer integrated machine through matched protrusions and grooves, the protrusions of the sprocket are matched with the grooves of the chain. The lower stirring shaft and the output shaft of the speed reducer integrated machine are driven through two or more groups of parallel arranged sprockets and chains.
2. A novel thickener bottom agitator as claimed in claim 1, wherein, The sprocket and the chain are provided with an outer shell.
3. A novel thickener bottom agitator as claimed in claim 2, wherein, 4. A novel thickener bottom agitator as claimed in claim 2, wherein, 5. A novel thickener bottom agitator as claimed in claim 4, wherein, 6. A novel thickener bottom agitator as claimed in claim 4, wherein,