Sedimentation tank for sewage treatment

Abstract

The utility model discloses a sedimentation tank for sewage treatment, which belongs to the technical field of sewage treatment and comprises a sedimentation tank body, a support frame is fixedly connected in the sedimentation tank body, an intercepting net is arranged on the outer surface of the support frame, a plurality of through holes distributed at equal intervals are formed in the outer surface of the intercepting net, and the through holes are communicated with the support frame. Two connecting frames are arranged on the outer surface of the intercepting net, a rolling shaft is rotationally connected between the two connecting frames, a scraping plate is arranged on the inner wall of the bottom of the sedimentation tank body, the inclination angle of the intercepting net is dynamically adjusted through a micro air cylinder, the sewage flow and the contact area of a through hole can be controlled in a self-adaptive mode, and the cleaning efficiency is improved. The settling efficiency is optimized, layered screening of suspended solids is achieved through a porous intercepting net, large impurities are intercepted by the surface, fine particles are settled along with water flow, the stage treatment effect is improved, a rotating and axial moving composite cleaning mode is formed by a rolling shaft and a dredging column on a connecting column, attachments on the inner walls of through holes are physically stripped, and the blocking risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically, to a sedimentation tank for wastewater treatment. Background Technology

[0002] In the field of wastewater treatment, sedimentation tanks, as one of the core treatment units, mainly remove suspended solids, colloidal impurities, and some dissolved pollutants from wastewater through gravity settling. They have advantages such as simple structure, convenient operation, and low energy consumption. Traditional sedimentation tanks can be divided into three types according to the water flow direction: horizontal flow, vertical flow, and radial flow. Their design is mostly based on the ideal sedimentation theory, which increases the tank volume to extend the retention time and improve removal efficiency.

[0003] Patent CN221836805U discloses a sedimentation tank for wastewater treatment, including a tank body and a reagent tank. A partition is fixedly connected to the middle of the inner cavity of the reagent tank. A rotating pipe is movably connected between the middle of the partition and the middle of the top of the reagent tank via a bearing. Spray nozzles are fixedly connected to the upper ends of both sides of the rotating pipe. A second circular gear is fixedly installed at the lower end of the rotating pipe. A delivery pump is fixedly installed at the left end of the bottom of the partition via a pipe. A rotary joint is fixedly installed between the output end of the delivery pump and the bottom of the rotating pipe via a pipe. This invention, through the arrangement of the reagent tank and partition, facilitates the storage of reagents required for wastewater treatment. The arrangement of the delivery pump, rotary joint, rotating pipe, and spray nozzles achieves automatic reagent dosing in wastewater. The dual-shaft motor, first bevel gear, first circular gear, second circular gear, rotating pipe, and spray nozzles effectively improve the uniformity of reagent dosing.

[0004] Although the device has many beneficial effects, the following problems still exist: Although the sedimentation tank effectively improves the uniformity of reagent dosing, the flow rate of sewage entering the sedimentation tank cannot be controlled. At high flow rates, the water velocity increases, the particle settling time is insufficient, and fine suspended solids are easily carried away by the water flow, resulting in excessive suspended solids in the effluent and reducing the overall treatment effect. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a sedimentation tank for wastewater treatment, which solves the aforementioned problems.

[0007] (II) Technical Solution

[0008] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a sedimentation tank for sewage treatment, comprising a sedimentation tank body, a support frame fixedly connected inside the sedimentation tank body, an intercepting net provided on the outer surface of the support frame, a plurality of equidistantly distributed through holes on the outer surface of the intercepting net, two connecting frames provided on the outer surface of the intercepting net, a roller rotatably connected between the two connecting frames, a scraper provided on the bottom inner wall of the sedimentation tank body, and further comprising:

[0009] An adjustable cleaning component, located on the outer surface of the interception net, is used to drive rollers to unclog the corresponding multiple through holes.

[0010] The scraping assembly, located on the outer surface of the sedimentation tank body, is used to drive the scraper to scrape away the sediment located at the bottom of the sedimentation tank body.

[0011] Preferably, the adjustable cleaning component includes unblocking columns, connecting columns, and micro cylinders. Two symmetrically distributed micro cylinders are fixedly installed inside the support frame. The output ends of the two micro cylinders are fixedly connected to the interception net. The center of the interception net is rotatably connected to the inner walls of both sides of the sedimentation tank body. Two symmetrically distributed connecting columns are fixedly connected between the two connecting frames. The roller is located between the two connecting columns. Multiple annularly distributed unblocking columns are fixedly connected to the outer surfaces of the roller and the two connecting columns. The multiple unblocking columns are in active contact with multiple through holes.

[0012] Preferably, the adjustable cleaning assembly further includes a threaded rod and a second motor. The threaded rod is rotatably connected to the outer surface of the connecting frame, and the second motor is fixedly installed on the outer surface of the connecting frame. The output end of the second motor is fixedly connected to the threaded rod, and the threaded rod is threadedly sleeved with a nearby connecting frame.

[0013] Preferably, each of the two connecting frames has a mounting block fixedly connected to its outer surface, and each of the two mounting blocks has a second roller rotatably connected to its outer surface perpendicular to it. Each of the two mounting blocks also has two first rollers rotatably connected to its outer surface parallel to it. The second roller is located between the two first rollers, and the two first rollers and the second roller are in rolling connection with the outer surface of the interception net.

[0014] Preferably, the scraping assembly includes a first motor, rectangular grooves, a traction rope, and a take-up reel. Rectangular grooves are formed on both inner walls of the sedimentation tank body. The scraper is slidably connected to the two rectangular grooves. The traction rope is fixedly connected to the outer surface of the scraper. The take-up reel is rotatably connected to the outer surface of the sedimentation tank body. The traction rope passes through the sedimentation tank body and is wound around the take-up reel. A protective shell is fixedly connected to the outer surface of the sedimentation tank body. The take-up reel is located inside the protective shell. The first motor is fixedly installed on the outer surface of the protective shell. The output end of the first motor is fixedly connected to the take-up reel.

[0015] Preferably, an inlet pipe is fixedly connected to the outer surface of the sedimentation tank body, and the inlet pipe is hollow and located inside the sedimentation tank body.

[0016] Preferably, a PLC controller is fixedly installed on the outer surface of the sedimentation tank body, and the first motor, the second motor, and the two micro cylinders are all controlled by the PLC controller.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a sedimentation tank for sewage treatment, which has the following features:

[0019] Beneficial effects:

[0020] This sedimentation tank for wastewater treatment dynamically adjusts the tilt angle of the intercepting net using a micro-cylinder, which adaptively controls the wastewater flow rate and the contact area of ​​the through holes, optimizing sedimentation efficiency. The porous intercepting net enables stratified screening of suspended solids, with larger impurities being trapped on the surface and fine particles settling with the water flow, thus improving the graded treatment effect. The rollers and the unblocking columns on the connecting columns form a combined rotation and axial movement cleaning mode, physically peeling off the deposits attached to the inner wall of the through holes, significantly reducing the risk of clogging. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a side view of the structure of this utility model;

[0023] Figure 3 This utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0024] Figure 4 This utility model Figure 2 Enlarged view of the structure at point B in the middle;

[0025] Figure 5 This is a schematic diagram of the support frame structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the winding wheel structure of this utility model.

[0027] In the diagram: 1. Sedimentation tank body; 2. Interception net; 3. Through hole; 4. Roller; 5. Unblocking column; 6. Connecting column; 7. Threaded rod; 8. First motor; 9. Inlet pipe; 10. PLC controller; 11. Rectangular trough; 12. Scraper; 13. Mounting block; 14. First roller; 15. Second roller; 16. Micro cylinder; 17. Second motor; 18. Support frame; 19. Traction rope; 20. Rewinding wheel; 21. Connecting 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-6 This utility model provides a technical solution:

[0030] A sedimentation tank for wastewater treatment includes a sedimentation tank body 1, a support frame 18 fixedly connected inside the sedimentation tank body 1, an intercepting net 2 on the outer surface of the support frame 18, a plurality of equidistantly distributed through holes 3 on the outer surface of the intercepting net 2, two connecting frames 21 on the outer surface of the intercepting net 2, and a roller 4 rotatably connected between the two connecting frames 21. A scraper 12 is provided on the inner wall of the bottom of the sedimentation tank body 1. The tank also includes:

[0031] An adjustable cleaning component, located on the outer surface of the interception net 2, is used to drive the roller 4 to unclog its corresponding multiple through holes 3;

[0032] The scraping component is located on the outer surface of the sedimentation tank body 1. It is used to drive the scraper 12 to scrape the sediment at the bottom of the sedimentation tank body 1. The interception net 2 performs preliminary screening of suspended solids through the through holes 3, and larger impurities are trapped on the surface of the interception net 2.

[0033] Furthermore, the adjustable cleaning component includes unblocking columns 5, connecting columns 6, and micro cylinders 16. Two symmetrically distributed micro cylinders 16 are fixedly installed inside the support frame 18. The output ends of the two micro cylinders 16 are fixedly connected to the interception net 2. The center of the interception net 2 is rotatably connected to the inner walls on both sides of the sedimentation tank body 1. Two symmetrically distributed connecting columns 6 are fixedly connected between the two connecting frames 21. The roller 4 is located between the two connecting columns 6. Multiple annularly distributed unblocking columns 5 are fixedly connected to the outer surfaces of the roller 4 and the two connecting columns 6. The multiple unblocking columns 5 are in active contact with multiple through holes 3. When the sewage inflow is constant, the tilt angle of the interception net 2 can be used to control the contact area between the sewage and the through holes 3, thereby controlling the flow rate of sewage into the sedimentation tank. The design of the unblocking columns 5 on the surface of the roller 4 and the connecting column 6 effectively destroys the deposits on the hole walls.

[0034] Furthermore, the adjustable cleaning assembly also includes a threaded rod 7 and a second motor 17. The threaded rod 7 is rotatably connected to the outer surface of the connecting frame 21, and the second motor 17 is fixedly installed on the outer surface of the connecting frame 21. The output end of the second motor 17 is fixedly connected to the threaded rod 7. The threaded rod 7 is threadedly engaged with the adjacent connecting frame 21. The second motor 17 drives the threaded rod 7 to rotate, causing the connecting frame 21 to move radially along the interception net 2, so that the roller 4 fully covers the through hole 3.

[0035] Furthermore, mounting blocks 13 are fixedly connected to the outer surfaces of both connecting frames 21. Second rollers 15 perpendicular to the outer surfaces of both mounting blocks 13 are rotatably connected to the outer surfaces of both mounting blocks 13. Two first rollers 14 parallel to the outer surfaces of both mounting blocks 13 are rotatably connected to the outer surfaces of both mounting blocks 13. The second rollers 15 are located between the two first rollers 14. The two first rollers 14 and the second rollers 15 are in rolling connection with the outer surface of the interception net 2. The first rollers 14 and the second rollers 15 on the mounting blocks 13 form an orthogonal constraint to ensure that the connecting frame 21 moves smoothly on the curved net surface and to prevent jamming.

[0036] Furthermore, the scraping assembly includes a first motor 8, rectangular grooves 11, a traction rope 19, and a take-up reel 20. Rectangular grooves 11 are provided on both inner walls of the sedimentation tank body 1. The scraper 12 is slidably connected to the two rectangular grooves 11. The traction rope 19 is fixedly connected to the outer surface of the scraper 12. The take-up reel 20 is rotatably connected to the outer surface of the sedimentation tank body 1. The traction rope 19 passes through the sedimentation tank body 1 and is wound around the take-up reel 20. A protective shell is fixedly connected to the outer surface of the sedimentation tank body 1. The take-up reel 20 is located inside the protective shell. The first motor 8 is fixedly installed on the outer surface of the protective shell. The output end of the first motor 8 is fixedly connected to the take-up reel 20. The first motor 8 drives the take-up reel 20 to rotate. The traction rope 19 pulls the scraper 12 to reciprocate along the rectangular grooves 11. The scraper 12 adopts a variable cross-section wedge design. The sharp angle at the front end cuts into the sediment layer, and the inclined surface at the rear end reduces adhesion.

[0037] Furthermore, an inlet pipe 9 is fixedly connected to the outer surface of the sedimentation tank body 1. The inlet pipe 9 is hollow and located inside the sedimentation tank body 1, and sewage enters the sedimentation tank body 1 through the inlet pipe 9.

[0038] Furthermore, a PLC controller 10 is fixedly installed on the outer surface of the sedimentation tank body 1. The first motor 8, the second motor 17, and the two micro cylinders 16 are all controlled by the PLC controller 10. The angle of the interception net 2 is adjusted by the PLC controller 10 through the control of the micro cylinders 16, and the traction speed is controlled by the control of the first motor 8 by the PLC controller 10.

[0039] Working principle: When the wastewater treatment sedimentation tank needs to be used, wastewater enters the sedimentation tank body 1 through the inlet pipe 9. The intercepting net 2 performs preliminary screening of suspended solids through the through holes 3, and larger impurities are trapped on the surface of the intercepting net 2. Two micro cylinders 16 extend and retract synchronously, pushing the intercepting net 2 to swing around the central axis. The angle of the intercepting net 2 is adjusted by the PLC controller 10 through the control of the micro cylinders 16. When the amount of wastewater entering is constant, the tilt angle of the intercepting net 2 can be used to control the contact area between the wastewater and the through holes 3, thereby controlling the flow rate of wastewater entering the sedimentation tank. When it is necessary to unclog the intercepting net 2, the second motor 17 is started. The second motor 17 drives the threaded rod 7 to rotate, causing the connecting frame 21 to move radially along the intercepting net 2. The roller 4 fully covers the through hole 3. The design of the roller 4 and the unblocking column 5 on the surface of the connecting column 6 effectively destroys the deposits on the hole wall. The first roller 14 and the second roller 15 on the mounting block 13 form an orthogonal constraint to ensure that the connecting frame 21 moves smoothly on the curved mesh surface and prevents jamming. When it is necessary to clean the bottom wall of the sedimentation tank body 1, the first motor 8 is started. The first motor 8 drives the winding wheel 20 to rotate and pulls the scraper 12 along the rectangular groove 11 through the traction rope 19. The scraper 12 adopts a variable cross-section wedge design. The sharp angle at the front end cuts into the sediment layer, and the inclined surface at the rear end reduces adhesion. The traction speed is controlled by the PLC controller 10 to control the first motor 8, so as to match the removal needs of sludge with different viscosity.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sedimentation tank for sewage treatment, comprising a sedimentation tank body (1), characterized by: The inner part of the sedimentation tank body (1) is fixedly connected with a support frame (18), the outer surface of the support frame (18) is provided with an intercepting net (2), a plurality of equidistant through holes (3) are formed in the outer surface of the intercepting net (2), the outer surface of the intercepting net (2) is provided with two connecting frames (21), a roller shaft (4) is rotatably connected between the two connecting frames (21), and the bottom inner wall of the sedimentation tank body (1) is provided with a scraper (12). An adjustable cleaning assembly is arranged on the outer surface of the intercepting net (2) and is used to drive the roller shaft (4) to dredge the corresponding through holes (3); A scraping assembly is arranged on the outer surface of the sedimentation tank body (1) and is used to drive the scraper (12) to scrape the deposits on the bottom of the sedimentation tank body (1).

2. The sedimentation tank for sewage treatment according to claim 1, characterized in that: The adjustable cleaning assembly comprises dredging columns (5), connecting columns (6) and micro-cylinders (16), the inner part of the support frame (18) is fixedly provided with two symmetrically distributed micro-cylinders (16), the output ends of the two micro-cylinders (16) are fixedly connected with the intercepting net (2), the center of the intercepting net (2) is rotatably connected with the inner walls of the two sides of the sedimentation tank body (1), the two connecting frames (21) are fixedly connected with two symmetrically distributed connecting columns (6), the roller shaft (4) is located between the two connecting columns (6), the outer surfaces of the roller shaft (4) and the two connecting columns (6) are fixedly connected with a plurality of annular equidistantly distributed dredging columns (5), and the plurality of dredging columns (5) are in movable contact with the plurality of through holes (3).

3. The sedimentation tank for sewage treatment according to claim 1, characterized in that: The adjustable cleaning assembly further comprises a threaded rod (7) and a second motor (17), the outer surface of the connecting frame (21) is rotatably connected with the threaded rod (7), the outer surface of the connecting frame (21) is fixedly provided with the second motor (17), the output end of the second motor (17) is fixedly connected with the threaded rod (7), and the threaded rod (7) is threadedly sleeved with the adjacent connecting frame (21).

4. The sedimentation tank for sewage treatment according to claim 1, characterized in that: The outer surfaces of the two connecting frames (21) are fixedly connected with mounting blocks (13), the outer surfaces of the two mounting blocks (13) are rotatably connected with second rollers (15) perpendicular thereto, the outer surfaces of the two mounting blocks (13) are rotatably connected with two first rollers (14) parallel thereto, the second rollers (15) are located between the two first rollers (14), and the two first rollers (14) and the second rollers (15) are rotatably connected with the outer surface of the intercepting net (2).

5. The sedimentation tank for sewage treatment according to claim 1, characterized in that: The scraping assembly comprises a first motor (8), a rectangular groove (11), a traction rope (19) and a winding wheel (20), the inner wall of both sides of the sedimentation tank body (1) is provided with a rectangular groove (11), the scraper (12) is slidably connected with the two rectangular grooves (11), the outer surface of the scraper (12) is fixedly connected with the traction rope (19), the outer surface of the sedimentation tank body (1) is rotatably connected with the winding wheel (20), the traction rope (19) penetrates through the sedimentation tank body (1) and is woundly connected with the winding wheel (20), the outer surface of the sedimentation tank body (1) is fixedly connected with a protective shell, the winding wheel (20) is located in the protective shell, the outer surface of the protective shell is fixedly installed with the first motor (8), and the output end of the first motor (8) is fixedly connected with the winding wheel (20).

6. The sedimentation tank for sewage treatment according to claim 1, characterized in that: The outer surface of the sedimentation tank body (1) is fixedly connected with a water inlet pipe (9), the water inlet pipe (9) is hollow and located in the inside of the sedimentation tank body (1).

7. The sedimentation tank for sewage treatment according to claim 5, characterized in that: The outer surface of the sedimentation tank body (1) is fixedly installed with a PLC controller (10), and the first motor (8), the second motor (17) and the two micro cylinders (16) are controlled by the PLC controller (10).

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