Central transmission mud scraper with skimming function

Abstract

The utility model discloses a center transmission mud scraper with a skimming function. The center transmission mud scraper comprises a driving device, a main shaft, a center cylinder, a scraping arm scraping plate, a stirring machine, a skimming device, an overflow weir and the like. The main shaft rotates to drive the wall scraping plate to scrape and collect sludge at the bottom of the pool to the central sludge collecting tank, and meanwhile, the sludge is prevented from being accumulated and discharged through the stirrer. Supernatant is discharged through an overflow weir, but dross on the surface of the tank is removed by a drossing device. The skimming device comprises a cross beam, a scum scraping plate, a scraping rake, a walking mechanism, a telescopic frame, an erasing brush and the like, scum can be effectively removed, attachments on the overflow weir can be removed, manual intervention is reduced, and the installation flexibility and adaptability of equipment are improved. Compared with a traditional center transmission mud scraper, the center transmission mud scraper has higher structural strength and stability, is particularly suitable for a sedimentation tank with a large tank diameter, has a remarkable skimming effect and efficient sewage treatment capacity, and can greatly improve the working efficiency and economic benefits of a sewage treatment plant.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment, and in particular relates to a center-driven sludge scraper with a sludge skimming function. Background Technology

[0002] With the acceleration of urbanization, the demand for wastewater treatment is increasing, especially in large-scale wastewater treatment plants. Sedimentation tanks, as key treatment units, play a crucial role in the settling and removal of solids. Against this backdrop, center-driven sludge scrapers are widely used in sedimentation tanks of wastewater treatment plants to collect and remove sludge deposited at the bottom, thereby improving wastewater treatment efficiency and ensuring that the treated water meets relevant standards. As an important piece of wastewater treatment equipment, center-driven sludge scrapers play a significant role in ensuring wastewater treatment quality. However, with changes in the operating environment, the skimming function of traditional center-driven sludge scrapers in existing technologies has revealed some obvious shortcomings, especially in large-diameter sedimentation tanks, where their performance and adaptability are particularly insufficient.

[0003] Currently, most center-driven sludge scrapers on the market adopt traditional structural designs. These devices primarily rely on simple scraper and rake devices for skimming, resulting in relatively limited functionality and difficulty in effectively removing surface scum. When dealing with large-diameter sedimentation tanks, traditional equipment lacks sufficient skimming capacity, failing to quickly and effectively remove scum, leading to scum accumulation on the surface. This not only affects the discharge of supernatant but may also disrupt the stability of the entire wastewater treatment process. Furthermore, in practical applications, the skimming devices of traditional center-driven sludge scrapers often suffer from insufficient structural strength or poor adjustability, making them unsuitable for on-site installations with significant tank size variations. Under certain special operating conditions, the equipment frequently faces the challenge of not adapting to the site environment, increasing maintenance costs and the need for manual intervention.

[0004] Furthermore, existing skimming devices often cannot solve installation problems caused by inconsistent tank dimensions or civil engineering errors. Traditional equipment often requires significant manual intervention and adjustments during on-site installation, which not only increases installation difficulty but also prolongs the construction period. Therefore, improving the structural stability, adaptability, and flexibility of the equipment has become a pressing technical challenge in the wastewater treatment field.

[0005] To address these issues, improving the skimming function of center-driven sludge scrapers—achieving breakthroughs not only in structural strength but also in effective scum removal, particularly in large-diameter sedimentation tanks—has become a key area for technological innovation. A solution is needed to address the problems of instability and poor skimming performance of traditional equipment in large-diameter environments, ensuring stable operation across a wider range of tank sizes while reducing on-site commissioning and installation difficulties, and improving equipment efficiency and economic benefits. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a center-driven sludge scraper with slag skimming function.

[0007] The specific technical solution provided by this utility model is as follows:

[0008] A center-driven sludge scraper with skimming function includes a motor mounted above a sedimentation tank and a main shaft driven by the motor. The main shaft extends through a central cylinder to the bottom of the sedimentation tank, which is used to spray wastewater into the sedimentation tank. A wall scraper driven by the main shaft is installed at the bottom of the sedimentation tank, with the end of the wall scraper contacting the inner wall of the sedimentation tank. A sludge collection trough is located below the wall scraper near the main shaft, containing a mixer driven by the main shaft. A sludge discharge pipe leading to the outside of the sedimentation tank is also provided on one side of the sludge collection trough. An overflow weir is provided circumferentially on the upper inner wall of the sedimentation tank, and a drainage pipe leading to the outside of the sedimentation tank is also provided on one side of the bottom of the overflow weir. The sludge scraper also includes a skimming device installed in the sedimentation tank, which is used to scrape and collect surface scum and discharge it from the sedimentation tank.

[0009] Furthermore, the skimming device includes a crossbeam disposed on the upper side of the overflow weir and a scum scraper and a rake connected to the crossbeam; one end of the crossbeam is connected to the main shaft, and the other end of the crossbeam is provided with a traveling mechanism located inside the overflow weir; the scum scraper and the rake are inclined and spliced ​​together to form a spoon-shaped part near the edge of the sedimentation tank, and a scum discharge port leading to the outside of the sedimentation tank is provided in the sedimentation tank corresponding to the position of the spoon-shaped part.

[0010] Preferably, the traveling mechanism is mounted on the underside of the crossbeam via a telescopic frame, which is used to adjust the height and tilt angle of the crossbeam.

[0011] Furthermore, the walking mechanism includes casters and an obstacle remover installed in front of the walking mechanism, the obstacle remover being used to push away obstacles on the walking path.

[0012] Preferably, the skimming device further includes a wiping brush disposed on the underside of the crossbeam and in contact with the sidewall of the overflow weir, the wiping brush being used to scrape off the deposits on the sidewall of the overflow weir.

[0013] Compared with existing technologies, this utility model has significant advantages and beneficial effects:

[0014] Firstly, by optimizing the structure of the skimming device, the overall stability and strength of the equipment are greatly improved. Especially when treating large-diameter sedimentation tanks, it can operate stably and effectively remove scum, solving the problem of traditional equipment being unable to adapt to large-diameter environments. Traditional equipment often suffers from insufficient structural strength or difficulty in adjustment in large-diameter applications, resulting in the inability to remove scum in a timely manner, affecting the discharge of supernatant and the efficiency of wastewater treatment. This new invention adopts a more robust and flexible design, enhancing the adaptability of the equipment and ensuring smooth installation and normal operation even under site conditions with inconsistent tank dimensions or significant civil engineering errors.

[0015] Secondly, the skimming device in this invention is equipped with a wiping brush, which can effectively remove deposits on the overflow weir, avoiding the need for manual removal of deposits required by traditional equipment. This reduces manual intervention and maintenance workload, lowering operating costs. Furthermore, the telescopic frame design of the skimming device allows the height and level of the crossbeam to be adjusted according to site conditions, greatly improving the installation flexibility of the equipment and avoiding installation difficulties caused by pool size errors in traditional designs. This flexibility not only speeds up the installation process but also improves the overall construction efficiency of the project.

[0016] Finally, by optimizing the working method of the scraper and rake, this invention enables scum to be collected and removed more efficiently, improving the skimming effect of the equipment and ensuring the efficiency and stability of the wastewater treatment process. These innovations enable this invention to significantly improve the working efficiency of the equipment, reduce operating and maintenance costs, and ensure that wastewater treatment plants can operate continuously and efficiently in larger-scale and more complex environments while solving several defects in traditional technologies. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the structure of a center-driven sludge scraper provided in one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the slag skimming device provided in one embodiment of the present invention;

[0020] Figure 3 This is a top view of a center-driven sludge scraper provided in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of a barrier clearing device provided in one embodiment of the present invention.

[0022] The reference numerals in the attached figures are as follows:

[0023] 100-Motor, 200-Main shaft, 300-Central cylinder, 400-Wall scraper, 500-Agitator, 600-Scum skimming device, 601-Crossbeam, 602-Scum scraper, 603-Scraper, 604-Walking mechanism, 605-Block remover, 606-Telescopic frame, 607-Wiping brush, 700-Overflow weir, 800-Scum discharge port. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] refer to Figure 1 This embodiment provides a center-driven sludge scraper with skimming function. The center-driven sludge scraper includes a motor 100 positioned above a sedimentation tank and a main shaft 200 driven by the motor 100. The main shaft 200 passes through a central cylinder 300 and extends to the bottom of the tank. A wall-scraping scraper 400, driven to rotate by the main shaft 200, is located at the bottom of the tank. The end of the wall-scraping scraper 400 contacts the inner wall of the tank. A sludge collection trough is located below the main shaft, and the wall-scraping scraper is inclined from its end towards the main shaft. A mixer 500 driven by the main shaft 200 is installed in the sludge collection trough, and a sludge discharge pipe leading to the outside of the tank is also provided in the sludge collection trough. An overflow weir 700 is circumferentially arranged on the upper inner wall of the sedimentation tank, and a drainage pipe leading to the outside of the tank is also provided on one side of the bottom of the overflow weir 700.

[0026] After the sewage enters the central cylinder 300 through the sewage pipe, it flows radially to the periphery of the pool through the outlet on the central cylinder. The sediment in the sewage settles to the bottom of the pool. At the same time, the motor 100 drives the main shaft 200 to rotate, and the wall scraper 400 rotates with the main shaft, scraping the sludge at the bottom of the pool into the sludge collection tank at the center. The sludge is then stirred by the mixer 500 and discharged to prevent sludge accumulation. In addition, the supernatant is discharged out of the pool through the overflow weir 700, but some unsettled garbage (such as leaves, feathers, etc.) in the supernatant is scraped off by the skimming device 600.

[0027] like Figures 2-4As shown, the skimming device 600 includes: a crossbeam 601, a scum scraper 602, a rake 603, a traveling mechanism 604, an obstacle remover 605, a telescopic frame 606, and a wiping brush 607. One end of the crossbeam 601 is connected to the main shaft 200, and the other end is connected to the traveling mechanism 604. A telescopic frame 606 is installed between the crossbeam 601 and the traveling mechanism 604. The telescopic frame 606 can adjust the height and inclination angle of the crossbeam 601, and can also avoid the installation difficulty caused by inaccurate on-site civil engineering dimensions. The obstacle remover 605 is installed in front of the traveling mechanism 604 to push away obstacles in the path of the traveling mechanism to prevent foreign objects from getting stuck. The scum scraper 602, the rake 603, and the wiping brush 607 are installed on the crossbeam 601, and the wiping brush 607 is in contact with the side wall of the overflow weir 700. When the main shaft 200 rotates, it drives the crossbeam 601 to rotate, and the traveling mechanism 604 also rotates accordingly. The scum on the liquid surface is collected on one side of the pool by the scum scraper 602 and the rake 603 and discharged through the scum outlet 800. Simultaneously, the cleaning brush 607 also rotates, scraping away the deposits on the overflow weir 700. For example... Figure 3 As shown, the scum scraper 602 and the rake 603 are spliced ​​together at an incline and form a spoon-shaped part near the edge of the pool, which facilitates the collection of scum and discharge from the scum outlet 800 at the edge of the pool.

[0028] The traveling mechanism 604 uses casters to facilitate rotation within the overflow weir, while the obstacle remover 605 can use a simple push rod that can push away obstacles in the path of the traveling mechanism.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A center drive mud scraper with skimming function, characterized in that, The mud scraper comprises a motor arranged above the sedimentation tank and a main shaft driven by the motor, the main shaft extends to the bottom of the sedimentation tank through a central cylinder, the central cylinder is used for distributing sewage into the sedimentation tank, the bottom of the sedimentation tank is provided with a wall scraping blade driven by the main shaft, the wall scraping blade is in contact with the inner wall of the sedimentation tank at the end, and a sludge collecting groove is arranged below the side of the wall scraping blade close to the main shaft, a stirrer driven by the main shaft is arranged in the sludge collecting groove, and a sludge discharging pipeline connected to the outside of the sedimentation tank is arranged on one side of the sludge collecting groove; the upper inner wall of the sedimentation tank is provided with an overflow weir in the circumferential direction, and a water discharging pipeline connected to the outside of the sedimentation tank is arranged on one side of the bottom of the overflow weir; the mud scraper further comprises a skimming device arranged in the sedimentation tank, and the skimming device is used for scraping and collecting water surface scum and discharging the scum out of the sedimentation tank.

2. The center drive mud scraper as claimed in claim 1, wherein, The skimming device comprises a cross beam arranged above the overflow weir, and a scum scraping plate and a scum rake connected with the cross beam; one end of the cross beam is connected with the main shaft, and the other end of the cross beam is provided with a walking mechanism arranged in the overflow weir; the scum scraping plate and the scum rake are mutually inclined and spliced, and form a spoon-shaped part at the edge of the sedimentation tank, and a residue discharging port connected to the outside of the sedimentation tank is arranged at the position corresponding to the spoon-shaped part in the sedimentation tank.

3. The center drive mud scraper as set forth in claim 2, wherein, The walking mechanism is arranged on the lower side of the cross beam through an extension frame, and the extension frame is used for adjusting the height and inclination angle of the cross beam.

4. The center drive mud scraper as set forth in claim 2, wherein, The walking mechanism comprises universal wheels and a barrier remover arranged in front of the walking mechanism, and the barrier remover is used for pushing away obstacles on the walking path.

5. The center drive mud scraper as set forth in claim 2, wherein, The skimming device further comprises a wiping brush arranged on the lower side of the cross beam and in contact with the side wall of the overflow weir, and the wiping brush is used for scraping the attachments on the side wall of the overflow weir.

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