Sludge discharge mechanism of sedimentation tank

Abstract

The utility model discloses a sludge discharge mechanism of a sedimentation tank, which comprises a sedimentation tank body, and a sludge scraping component is mounted at the top of the sedimentation tank body; a gate valve fixedly penetrates through a sludge outlet of the sedimentation tank body, a conical barrel fixedly penetrates through the top of the gate valve, a discharge pipe fixedly penetrates through a discharge port of the conical barrel, and an auger extrusion assembly is jointly mounted between the conical barrel and the discharge pipe; and a filtering assembly is embedded at the bottom of the conical barrel in a sealing manner. According to the sludge dewatering device, the gate valve, the conical barrel, the auger extrusion assembly, the filtering assembly and the water collecting tank are arranged, so that sludge conveying and mechanical dewatering are synchronously completed, the water content of sludge can be effectively reduced in the sludge conveying process, the separated water is recycled in a centralized manner through the water collecting tank, and the sludge dewatering efficiency is improved. The problems that a traditional sludge discharging device is prone to blockage and single in function are solved, the dehydration efficiency is remarkably improved, and the follow-up treatment load is relieved.

Description

Technical Field

[0001] This utility model relates to the technical field of sludge discharge mechanisms, and in particular to a sludge discharge mechanism for a sedimentation tank. Background Technology

[0002] Sedimentation tanks are a common wastewater treatment technology used to remove suspended solids, organic matter, and harmful substances from wastewater. They utilize physical principles, using gravity to allow particulate matter and flocs in the wastewater to settle to the bottom of the tank, thus achieving solid-liquid separation. They are widely used in municipal water supply, wastewater treatment, and industrial water treatment.

[0003] Currently, during the use of sedimentation tanks, a sludge removal mechanism is required to assist in removing the sludge that has settled at the bottom of the sedimentation tank.

[0004] The prior art disclosure number CN221230005U discloses a sludge removal device for sewage treatment, which includes a sedimentation tank and a sludge removal device. The sedimentation tank is provided with an inlet pipe, an installation platform and a sludge removal pipe. One end of the inlet pipe is sealed and passes through the bottom of the sedimentation tank and extends into the sedimentation tank. Inlets are symmetrically arranged on both sides of the inlet pipe. A sludge removal trough is provided on one side of the inlet pipe in the sedimentation tank. The sludge removal pipe is located at the bottom of the sedimentation tank and one end is connected to the sludge removal trough.

[0005] This device avoids sludge caking or sludge discharge pipe blockage. However, it cannot simultaneously achieve solid-liquid separation and preliminary dewatering during material transport. This limitation results in discharged sludge still containing a large amount of water, increasing the processing load on subsequent dewatering equipment and leading to high energy consumption and operating costs for the overall sludge treatment system. This technical deficiency is particularly prominent in the current environmental context emphasizing energy conservation, emission reduction, and resource utilization, necessitating structural innovation to achieve synergistic optimization of transport and dewatering. Utility Model Content

[0006] This utility model is a sludge removal mechanism for sedimentation tanks proposed to overcome the shortcomings of existing technologies.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a sludge discharge mechanism for a sedimentation tank, comprising a sedimentation tank body, wherein a sludge scraping assembly is installed on the top of the sedimentation tank body;

[0008] A slide gate valve is fixedly connected to the sludge outlet of the sedimentation tank body, a conical cylinder is fixedly connected to the top of the slide gate valve, a discharge pipe is fixedly connected to the discharge port of the conical cylinder, and an auger extrusion assembly is installed between the conical cylinder and the discharge pipe.

[0009] The bottom of the conical cylinder is sealed with a filter assembly;

[0010] The conical cylinder is symmetrically equipped with two pressing components, and the pressing components are matched with the filter components;

[0011] A water collection tank is provided below the filter assembly.

[0012] Furthermore, the sludge scraping assembly includes a fixing frame, which is fixedly installed on the top of the sedimentation tank body. A first motor is fixedly installed at the middle of the top of the fixing frame. A main shaft is fixedly connected to the drive end of the first motor, and the main shaft passes through the fixing frame. Two sludge scraping plates are symmetrically fixedly connected to the outer surface of the main shaft, and the sludge scraping plates are in contact with the inner wall and bottom of the sedimentation tank body to assist in sludge scraping.

[0013] Furthermore, the auger extrusion assembly includes a second motor, which is fixedly installed on the end face of the conical cylinder. The drive shaft of the second motor passes through the conical cylinder and is fixedly connected to a conveying auger. The end of the conveying auger away from the second motor is fixedly connected to a conical auger, and the end of the conical auger is rotatably connected to the inner wall of the discharge pipe. The conical auger cooperates with the conical cylinder to have an extrusion effect on the sludge.

[0014] Furthermore, the outer walls of both the conveying auger and the conical auger are fitted to the inner wall of the conical cylinder to ensure the conveying and compression effect of the sludge.

[0015] Furthermore, the filter assembly includes a mounting frame, which is sealed and fitted into the bottom of the conical cylinder. A filter screen is fixedly connected to the inner surface of the mounting frame, and the filter screen fits into the conical auger. The mounting frame facilitates the installation of the filter screen.

[0016] Furthermore, both of the pressing components include a screw, which is rotatably fitted into the top of the conical cylinder. A handwheel is fixedly connected to the top of the screw, and a movable frame is threaded onto the outer surface of the screw. The inner bottom of the movable frame is fitted with the bottom of the mounting frame. Two sliding rods are symmetrically provided on the top of the movable frame, penetrating into the interior. The sliding rods are slidably connected to the movable frame and fixedly connected to the conical cylinder. The sliding rods have a limiting function, which can ensure the stability of the movable frame's movement.

[0017] Furthermore, a water outlet pipe is fixedly connected to one side of the outer surface of the water collection tank, which facilitates the discharge of sewage from the water collection tank.

[0018] The beneficial effects of this utility model are:

[0019] In use, the sludge discharge mechanism of this sedimentation tank, through the setting of a slide valve, a conical cylinder, an auger extrusion assembly, a filter assembly, and a water collection tank, realizes the simultaneous completion of sludge transportation and mechanical dewatering. During the sludge transportation process, the sludge moisture content can be effectively reduced, and the separated water is collected and recovered through the water collection tank. This not only solves the problems of easy clogging and single function of traditional sludge discharge devices, but also significantly improves dewatering efficiency and reduces the load on subsequent processing.

[0020] The conical cylinder, pressing assembly, and filter assembly allow for easy and quick replacement of the filter assembly, improving replacement efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 : A perspective view of this utility model;

[0023] Figure 2 : A cross-sectional view of this utility model;

[0024] Figure 3 The present utility model Figure 1 Enlarged view of point A in the middle;

[0025] Figure 4 The present utility model Figure 2 Enlarged view of point B in the middle.

[0026] The attached figures are labeled as follows:

[0027] 1. Sedimentation tank body; 2. Main shaft; 3. Sludge scraper; 4. First motor; 5. Fixing frame; 6. Water outlet pipe; 7. Water collection trough; 8. Discharge pipe; 9. Conveying auger; 10. Slide valve; 11. Conical auger; 12. Slide rod; 13. Screw; 14. Handwheel; 15. Conical cylinder; 16. Second motor; 17. Mounting frame; 18. Filter screen; 19. Movable frame. Detailed Implementation

[0028] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1 to 3 As shown, a sludge removal mechanism for a sedimentation tank is disclosed, comprising a sedimentation tank body 1, a sludge scraping assembly mounted on the top of the sedimentation tank body 1, the sludge scraping assembly including a fixing frame 5, the fixing frame 5 being fixedly mounted on the top of the sedimentation tank body 1, a first motor 4 being fixedly mounted at the middle of the top of the fixing frame 5, a main shaft 2 being fixedly connected to the drive end of the first motor 4, and the main shaft 2 being disposed through the fixing frame 5, two sludge scraping plates 3 being symmetrically fixedly connected to the outer surface of the main shaft 2, and the sludge scraping plates 3 being in contact with the inner wall and the inner bottom of the sedimentation tank body 1. The sludge scraping assembly adopts a symmetrical design to ensure that the sludge at the bottom of the tank can be scraped evenly and to avoid local accumulation.

[0030] A slide gate valve 10 is fixedly connected to the sludge outlet of the sedimentation tank body 1. A conical cylinder 15 is fixedly connected to the top of the slide gate valve 10. A discharge pipe 8 is fixedly connected to the discharge port of the conical cylinder 15. An auger extrusion assembly is installed between the conical cylinder 15 and the discharge pipe 8. The auger extrusion assembly includes a second motor 16, which is fixedly installed on the end face of the conical cylinder 15. The drive shaft of the second motor 16 passes through the conical cylinder 15 and is fixedly connected to a conveying auger 9. A conical auger 11 is fixedly connected to the end of the conveying auger 9 away from the second motor 16. The end of the conical auger 11 is rotatably connected to the inner wall of the discharge pipe 8. The outer walls of both the conveying auger 9 and the conical auger 11 are in contact with the inner wall of the conical cylinder 15. The drive shaft of the second motor 16 is connected to the conical cylinder 15 by a mechanical seal to ensure the sealing of the connection and prevent sewage leakage.

[0031] The bottom of the conical cylinder 15 is sealed with a filter assembly, which includes a mounting frame 17. The mounting frame 17 is fitted into the bottom of the conical cylinder 15. A filter screen 18 is fixedly connected to the inner surface of the mounting frame 17 and fits against the conical auger 11. The filter assembly adopts a modular design, which facilitates quick replacement and maintenance. At the same time, the tight fit between the filter screen 18 and the auger ensures the dewatering effect and prevents sludge from clogging during the filtration process.

[0032] Two pressing components are symmetrically installed on the conical cylinder 15, and the pressing components are matched with the filter components. Both pressing components include a screw 13, and the screw 13 is rotatably embedded in the top of the conical cylinder 15. A handwheel 14 is fixedly connected to the top of the screw 13. A movable frame 19 is threaded onto the outer surface of the screw 13, and the inner bottom of the movable frame 19 is in contact with the bottom of the mounting frame 17. Two sliding rods 12 are symmetrically provided on the top of the movable frame 19, which are slidably connected to the movable frame 19 and fixedly connected to the conical cylinder 15. The screw 13 adopts a sawtooth thread design, and the asymmetrical tooth profile design (30° bearing surface / 45° non-bearing surface) forms a one-way self-locking effect, which has a good vibration resistance effect.

[0033] A water collection tank 7 is provided below the filter assembly. A water outlet pipe 6 is fixedly connected to one side of the outer surface of the water collection tank 7. The design of the water collection tank 7 can effectively collect the filtered water.

[0034] Working principle: The first motor 4 drives the main shaft 2 to rotate the scraper 3, scraping the sludge at the bottom of the sedimentation tank body 1 to the sludge outlet. After the slide valve 10 is opened, the second motor 16 drives the conveying auger 9 and the conical auger 11 to rotate, conveying the sludge from the conical cylinder 15 to the discharge pipe 8.

[0035] The tapered structure of the conical auger 11 and the conical cylinder 15 forms a progressive squeezing force, which forces the water in the sludge to seep out. The seeping water enters the water collection tank 7 through the bottom filter screen 18 and is discharged through the water outlet pipe 6.

[0036] After being dewatered, the sludge is further compressed by the conical auger 11 and then discharged from the discharge pipe 8.

[0037] By rotating the handwheel 14 to drive the screw 13 to rotate, the movable frame 19 can be controlled to move away from the mounting frame 17, releasing the limit on the mounting frame 17. Then, the filter assembly can be removed, a new filter assembly can be installed, and then the filter assembly can be pressed together by the pressing assembly.

[0038] It should be noted that, in actual use, an existing PLC controller can be added. The PLC controller is electrically connected to the first motor 4, the second motor 16, and the slide gate valve 10 to facilitate overall control. The specific data analysis and processing involved to further realize the control function are methods that can be implemented by those skilled in the art based on common knowledge. These methods are not within the scope of this solution. The above description is merely to illustrate the beneficial effects that this hardware structure improvement can achieve, based on common knowledge.

[0039] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sludge removal mechanism for a sedimentation tank, comprising a sedimentation tank body (1), characterized in that: A sludge scraping assembly is installed on the top of the sedimentation tank body (1); The sludge outlet of the sedimentation tank body (1) is fixedly connected to a slide valve (10), the top of the slide valve (10) is fixedly connected to a conical cylinder (15), the outlet of the conical cylinder (15) is fixedly connected to a discharge pipe (8), and an auger extrusion assembly is installed between the conical cylinder (15) and the discharge pipe (8). The bottom of the conical cylinder (15) is sealed with a filter assembly; The conical cylinder (15) is symmetrically equipped with two pressing components, and the pressing components are matched with the filter components; A water collection tank (7) is provided below the filter assembly.

2. The sludge removal mechanism for a sedimentation tank according to claim 1, characterized in that: The sludge scraping assembly includes a fixing frame (5), which is fixedly installed on the top of the sedimentation tank body (1). A first motor (4) is fixedly installed at the middle of the top of the fixing frame (5). A main shaft (2) is fixedly connected to the drive end of the first motor (4), and the main shaft (2) passes through the fixing frame (5). Two sludge scraping plates (3) are symmetrically fixedly connected to the outer surface of the main shaft (2), and the sludge scraping plates (3) are in contact with the inner wall and the inner bottom of the sedimentation tank body (1).

3. The sludge removal mechanism for a sedimentation tank according to claim 1, characterized in that: The auger extrusion assembly includes a second motor (16), which is fixedly installed on the end face of the conical cylinder (15). The drive shaft of the second motor (16) passes through the conical cylinder (15) and is fixedly connected to a conveying auger (9). The end of the conveying auger (9) away from the second motor (16) is fixedly connected to a conical auger (11), and the end of the conical auger (11) is rotatably connected to the inner wall of the discharge pipe (8).

4. The sludge removal mechanism for a sedimentation tank according to claim 3, characterized in that: The outer walls of both the conveying auger (9) and the conical auger (11) are in contact with the inner wall of the conical cylinder (15).

5. The sludge removal mechanism for a sedimentation tank according to claim 1, characterized in that: The filter assembly includes a mounting frame (17) which is fitted into the bottom of the conical cylinder (15). A filter screen (18) is fixedly connected to the inner surface of the mounting frame (17), and the filter screen (18) is attached to the conical auger (11).

6. The sludge removal mechanism for a sedimentation tank according to claim 5, characterized in that: Both of the pressing components include a screw (13), and the screw (13) is rotatably fitted into the top of the conical cylinder (15). A handwheel (14) is fixedly connected to the top of the screw (13). A movable frame (19) is threaded onto the outer surface of the screw (13), and the inner bottom of the movable frame (19) is in contact with the bottom of the mounting frame (17). Two sliding rods (12) are symmetrically provided on the top of the movable frame (19) and extend into the interior. The sliding rods (12) are slidably connected to the movable frame (19) and fixedly connected to the conical cylinder (15).

7. The sludge removal mechanism for a sedimentation tank according to claim 1, characterized in that: A water outlet pipe (6) is fixedly connected to one side of the outer surface of the water collection tank (7).

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