Buoyancy deslagging device for secondary sedimentation tank
By installing airbags and vacuum pumps on the float and adjusting buoyancy using a level gauge, the problem of poor collection effect of the secondary sedimentation tank scum collection device when the water level changes is solved, and stable collection and discharge of scum is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-24
AI Technical Summary
In existing technologies, the scum collection device for secondary sedimentation tanks cannot effectively collect scum when the water level changes, resulting in poor collection performance.
By installing airbags and vacuum pumps on the float, and using a level gauge to detect the liquid level difference, the inflation and deflation of the airbags are controlled to adjust the buoyancy of the float, ensuring that the top of the float is always slightly below the water surface, thus ensuring that scum enters the float and is discharged through the scum discharge system.
It enables stable collection and discharge of scum when the water level changes, thus improving the scum collection efficiency.
Smart Images
Figure CN224024340U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of underwater sludge removal technology, specifically to a buoyancy sludge removal device for a secondary sedimentation tank. Background Technology
[0002] Scum will be generated on the surface of the secondary sedimentation tank in the sewage treatment plant. Scum is a flocculent or lumpy substance that floats on the water surface after the activated sludge mixture has settled.
[0003] Currently, the scum removal method for secondary sedimentation tanks uses a central rotating scraper combined with a trough. The central rotating scraper skims the scum from the surface of the secondary sedimentation tank to the perimeter. A hook-type, removable trough is installed on the perimeter side wall to collect the scum based on the difference in water level at the outlet, and then the scum is discharged through a scum removal system. However, because the trough remains stationary during the scum removal process, when the water level in the secondary sedimentation tank is too high, the scum simply floats away from the top of the trough; when the water level is too low, the scum cannot enter the trough, resulting in poor scum collection. Utility Model Content
[0004] The technical problem this invention aims to solve is that currently, scum collected by a central rotating scraper is used to collect scum around the pool by setting hooks on the side walls of the pool. However, when the water level in the secondary sedimentation tank changes, the trough cannot collect scum, resulting in poor scum collection. The purpose is to provide a buoyancy-based scum removal device for secondary sedimentation tanks, which uses a vacuum pump to evacuate or inflate the air bladder, controlling the buoyancy of the float bucket. This ensures that the top opening of the float bucket remains slightly below the water surface of the secondary sedimentation tank even when the water level changes, thus ensuring that scum can enter the float bucket.
[0005] This utility model is achieved through the following technical solution:
[0006] A buoyancy-based sludge removal device for a secondary sedimentation tank includes a slide rail, a level gauge, a float, and a buoyancy adjustment structure. In operation, the slide rail is vertically connected to the wall of the secondary sedimentation tank; rollers are installed on the side wall of the float, and the rollers are slidably connected to the slide rail; the top of the float is open, and an air bladder is installed on the outer side wall of the float; the buoyancy adjustment structure includes a vacuum pump, which pumps air out or inflates the air bladder in operation; the level gauge is installed on the top of the float.
[0007] The beneficial effects of this utility model are as follows: by connecting a vertically installed slide rail to the wall of the secondary sedimentation tank, and by installing rollers on the side wall of the float bucket that are slidably connected to the slide rail, the float bucket can slide up and down along the slide rail. Furthermore, by installing an air bladder on the outer side wall of the float bucket, the liquid level of the float bucket can be detected by a level gauge during operation, thereby obtaining the liquid level difference between the top of the float bucket and the water surface of the secondary sedimentation tank. The liquid level data is transmitted to the control terminal, which controls the working state of the vacuum pump to evacuate or inflate the air bladder, thereby controlling the buoyancy of the float bucket. This ensures that the top opening of the float bucket remains slightly lower than the water surface of the secondary sedimentation tank (the liquid level difference between the float bucket and the water surface of the secondary sedimentation tank is 5mm-10mm) even when the water level changes. This ensures that scum can enter the float bucket and be discharged by the scum discharge system, thus ensuring the effectiveness of the float bucket in collecting scum.
[0008] In some embodiments, a motor bracket is also included, which is connected to the upper top of the secondary sedimentation tank wall, and the vacuum pump is fixedly connected to the motor bracket. By setting the motor bracket at the upper top of the secondary sedimentation tank wall, the vacuum pump is supported and positioned.
[0009] In some embodiments, the buoyancy adjustment structure includes an air tube, with the airbag surrounding the outer wall of the float. Both ends of the air tube are sealed to the output end of a vacuum pump and the airbag, respectively. The motor bracket is located on one side of the top of the slide rail, and the vacuum pump has a lateral distance from the top of the slide rail. By sealing the air tube to the output end of the vacuum pump and the airbag, the airbag can be inflated and deflated by the vacuum pump. Furthermore, the location of the motor bracket on one side of the top of the slide rail and the lateral distance between the vacuum pump and the top of the slide rail prevent the air tube from interfering with the float's operation when the float moves up and down.
[0010] In some embodiments, the air pipe is a flexible hose, and in the working state, the end of the air pipe connected to the float moves up and down along the wall of the secondary sedimentation tank. By setting the air pipe as a flexible hose, the end of the air pipe connected to the float can move synchronously when the float moves up and down.
[0011] In some embodiments, a guide cover is further included. The guide cover is vertically connected to the side wall of the secondary sedimentation tank. The guide cover is elongated and shell-shaped. The slide rail is installed on the inner side of the guide cover. A guide hole is provided on the side wall of the guide cover away from the slide rail. The guide hole extends along the length of the guide cover. The roller is located on the inner side of the guide cover. By providing a guide cover, it is easier to prevent the roller from falling off the slide rail, thereby enabling the float to move up and down with the water level.
[0012] In some embodiments, a mounting base is provided on the side wall of the float. The mounting base includes a connecting portion and a support rod. The connecting portion is connected to the side wall of the float, and the roller is rotatably connected to the free end of the support rod. The roller is supported and positioned by providing the support base.
[0013] In some embodiments, rollers are provided on the sidewalls along the length of the guide hole, and the rollers are slidably engaged with the wheels. In the working state, the support rod moves up and down along the guide hole. By providing rollers and wheels to engage on the sidewalls of the guide hole, the wheels are limited, ensuring that they can move smoothly up and down under the influence of the bucket's gravity and buoyancy. Furthermore, the support rod passes through the guide hole and moves up and down along it, guiding the movement of the wheels and ensuring that the bucket's trajectory is vertical.
[0014] In some embodiments, the support rod is cylindrical. Setting the support rod to a cylindrical shape reduces the contact area between the support rod and the guide hole, ensuring smooth up-and-down movement of the roller.
[0015] In some embodiments, two guide plates are also included, which are connected to the top outer side of the float bucket. The free ends of the guide plates are inclined downward. By providing guide plates with downward-inclined free ends at both ends of the top of the float bucket, it is convenient for the central rotating scraper to contact the guide plate first when it approaches the float bucket, so that the float bucket can be pressed down by a certain distance, allowing more scum at the central rotating scraper to enter the float bucket.
[0016] In some embodiments, a slag discharge pipe is also included, one end of which is connected to the bottom of the float bucket, and the other end extends out of the wall of the secondary sedimentation tank. By providing a slag discharge pipe at the bottom of the float bucket, the power equipment of the slag discharge system can easily pump the slag located in the float bucket into the slag treatment tank.
[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0018] 1. The level of the float is detected by a level gauge, thereby obtaining the level difference between the top of the float and the water surface of the secondary sedimentation tank. The level data is transmitted to the control terminal, which controls the working status of the vacuum pump to evacuate or inflate the air bladder, thereby controlling the buoyancy of the float. This ensures that the top opening of the float is always slightly lower than the water surface of the secondary sedimentation tank (the level difference between the float and the water surface of the secondary sedimentation tank is 5mm-10mm) even when the water level changes. This ensures that scum can enter the float and be discharged by the scum removal system, thus ensuring the effectiveness of the float in collecting scum.
[0019] 2. Rollers are installed on the side wall of the guide hole to cooperate with the rollers. Based on limiting the rollers, it is ensured that the rollers can move up and down smoothly under the action of the weight and buoyancy of the float. The support rod passes through the guide hole and moves up and down along the guide hole to guide the movement of the rollers, so that the running trajectory of the float is up and down. Attached Figure Description
[0020] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:
[0021] Figure 1 This is a structural diagram of the present utility model;
[0022] Figure 2 This is a top view of the floating bucket in this utility model;
[0023] Figure 3 This is a structural diagram of the floating bucket in this utility model;
[0024] Figure 4 This is a cross-sectional view along the pulley axis when the pulley and slide rail of this utility model are in conjunction.
[0025] The attached diagram shows the markings and corresponding component names:
[0026] Secondary sedimentation tank 10, slide rail 11, guide cover 12, guide hole 121, roller 13, float 20, air bag 21, guide plate 22, slag discharge pipe 23, roller 25, connecting part 26, support rod 27, motor bracket 30, vacuum pump 31, air pipe 32. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.
[0028] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0029] In the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limiting the scope of protection of this utility model.
[0030] The terms "first," "second," etc., used in this utility model are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.
[0031] Example
[0032] like Figures 1-4 As shown, this embodiment provides a system including a slide rail 11, a level gauge, a float 20, and a buoyancy adjustment structure. In operation, the slide rail 11 is vertically connected to the wall of the secondary sedimentation tank 10. Rollers 25 are provided on the side wall of the float 20, and the rollers 25 are slidably connected to the slide rail 11. The top of the float 20 is open, and an air bladder 21 is provided on the outer side wall of the float 20. The buoyancy adjustment structure includes a vacuum pump 31. In operation, the vacuum pump 31 pumps or inflates the air bladder 21. The level gauge is installed on the top of the float 20.
[0033] Specifically, since the float 20 is movable, the level gauge can use non-contact ultrasonic or laser methods, or use a float-type sensor to improve measurement accuracy.
[0034] like Figure 1As shown, it also includes a motor bracket 30, which is connected to the upper top of the secondary sedimentation tank 10 wall, and the vacuum pump 31 is fixedly connected to the motor bracket 30. By setting the motor bracket 30 at the upper top of the secondary sedimentation tank 10 wall, the vacuum pump 31 is supported and positioned.
[0035] like Figure 1 As shown, the buoyancy adjustment structure includes an air pipe 32, and an airbag 21 surrounds the outer wall of the float 20. Both ends of the air pipe 32 are sealed to the output end of a vacuum pump 31 and the airbag 21, respectively. The motor bracket 30 is located on one side of the top of the slide rail 11, and the vacuum pump 31 has a lateral distance from the top of the slide rail 11. By sealing the air pipe 32 to the output end of the vacuum pump 31 and the airbag 21, the airbag 21 can be inflated and deflated by the vacuum pump 31. Furthermore, the location of the motor bracket 30 on one side of the top of the slide rail 11, with a lateral distance between the vacuum pump 31 and the top of the slide rail 11, prevents the air pipe 32 from interfering with the operation of the float 20 when it moves up and down.
[0036] like Figure 1 As shown, the air pipe 32 is a flexible hose. In operation, the end of the air pipe 32 connected to the float 20 moves up and down along the wall of the secondary sedimentation tank 10. By setting the air pipe 32 as a flexible hose, the end of the air pipe 32 connected to the float 20 can move synchronously when the float 20 moves up and down.
[0037] like Figures 1-4 As shown, the system also includes a guide cover 12, which is vertically connected to the side wall of the secondary sedimentation tank 10. The guide cover 12 is elongated and shell-shaped. The slide rail 11 is installed on the inner side of the guide cover 12. A guide hole 121 is provided on the side wall of the guide cover 12 away from the slide rail 11. The guide hole 121 extends along the length of the guide cover 12. The roller 25 is located on the inner side of the guide cover 12. By providing the guide cover 12, it is easy to prevent the roller 25 from falling off the slide rail 11, thereby enabling the float 20 to move up and down with the water level.
[0038] like Figures 1-4 As shown, a mounting base is provided on the side wall of the float 20. The mounting base includes a connecting part 26 and a support rod 27. The connecting part 26 is connected to the side wall of the float 20, and the roller 25 is rotatably connected to the free end of the support rod 27. The roller 25 is supported and positioned by the support base.
[0039] like Figures 1-4As shown, rollers 13 are provided on the sidewalls along the length of the guide hole 121. The rollers 13 are slidably engaged with the rollers 25. In the working state, the support rod 27 moves up and down along the guide hole 121. By providing rollers 13 and rollers 25 on the sidewalls of the guide hole 121, the rollers 25 are limited, ensuring that they can move up and down smoothly under the influence of gravity and buoyancy of the float 20. The support rod 27 passes through the guide hole 121 and moves up and down along it, guiding the movement of the rollers 25 so that the float 20 moves up and down.
[0040] See Figure 4 The support rod 27 is cylindrical. By making the support rod 27 cylindrical, the contact area between the support rod 27 and the guide hole 121 is reduced, ensuring the smoothness of the roller 25 when moving up and down.
[0041] See Figure 4 Both the slide rail 11 and the guide cover 12 extend along the height direction of the secondary sedimentation tank 10. By extending both the slide rail 11 and the guide cover 12 along the height direction of the secondary sedimentation tank 10, the float 20 can move up and down along the height direction of the tank wall during operation.
[0042] See Figure 3 and Figure 4 It also includes two guide plates 22, which are connected to the top outer side of the float hopper 20. The free ends of the guide plates 22 are inclined downward. By setting the guide plates 22 with downward inclination at both ends of the top of the float hopper 20, it is convenient for the central rotating scraper to contact the guide plate 22 first when it approaches the float hopper 20, so that the float hopper 20 can be pressed down by a certain distance. Under the negative pressure generated by the slag discharge system, more slag at the central rotating scraper can enter the float hopper 20.
[0043] See Figure 4 It also includes a slag discharge pipe 23, one end of which is connected to the bottom of the float 20, and the other end extends out of the wall of the secondary sedimentation tank 10. By setting the slag discharge pipe 23 at the bottom of the float 20, it is convenient for the power equipment of the slag discharge system to suck the slag in the float 20 into the slag treatment tank.
[0044] During operation, the liquid level in the float 20 is detected by a level gauge, thereby obtaining the liquid level difference between the top of the float 20 and the water surface of the secondary sedimentation tank 10. The liquid level data is then transmitted to the control terminal, which controls the system.
[0045] The vacuum pump 31 operates by evacuating or inflating the air bladder 21, controlling the buoyancy of the float 20. This ensures that the top opening of the float 20 remains slightly lower than the water surface of the secondary sedimentation tank 10 (the water level difference between the float 20 and the secondary sedimentation tank 10 is 5mm-10mm) even when the water level changes. This ensures that scum can enter the float 20 and be discharged by the scum removal system, thereby ensuring the effective collection of scum by the float 20. When the central rotating scraper passes over the float 20 (where the scum is most abundant), the power of the scum removal system can be increased to increase the scum removal volume.
[0046] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A buoyancy-based slag removal device for a secondary sedimentation tank, characterized in that, include: In the working state, the slide rail is vertically connected to the wall of the secondary sedimentation tank; The float has rollers on its side wall, which are slidably connected to the slide rail. The top of the float is open, and an airbag is provided on the outer side wall of the float. A buoyancy adjustment structure, comprising a vacuum pump, wherein in operation, the vacuum pump evacuates or inflates the airbag; A level gauge is mounted on top of the float.
2. The buoyancy-based slag removal device for a secondary sedimentation tank according to claim 1, characterized in that, It also includes a motor bracket, which is connected to the upper top of the secondary sedimentation tank wall, and the vacuum pump is fixedly connected to the motor bracket.
3. The buoyancy-based slag removal device for a secondary sedimentation tank according to claim 2, characterized in that, The buoyancy adjustment structure includes an air pipe, the airbag is surrounded on the outer wall of the float, the two ends of the air pipe are respectively sealed to the output end of the vacuum pump and the airbag, the motor bracket is located on one side of the top of the slide rail, and the vacuum pump has a lateral distance from the top of the slide rail.
4. The buoyancy-based slag removal device for a secondary sedimentation tank according to claim 3, characterized in that, The air pipe is a flexible tube. In operation, the end of the air pipe connected to the float moves up and down along the wall of the secondary sedimentation tank.
5. The buoyancy-based slag removal device for a secondary sedimentation tank according to claim 3, characterized in that, It also includes a guide cover, which is vertically connected to the side wall of the secondary sedimentation tank. The guide cover is elongated and shell-shaped. The slide rail is installed on the inner side of the guide cover. A guide hole is provided on the side wall of the guide cover away from the slide rail. The guide hole extends along the length of the guide cover. The roller is located on the inner side of the guide cover.
6. The buoyancy-based slag removal device for a secondary sedimentation tank according to claim 5, characterized in that, A mounting base is provided on the side wall of the float. The mounting base includes a connecting part and a support rod. The connecting part is connected to the side wall of the float, and the roller is rotatably connected to the free end of the support rod.
7. The buoyancy-based slag removal device for a secondary sedimentation tank according to claim 6, characterized in that, Rollers are provided on the sidewalls along the length of the guide hole. The rollers and the wheel are slidably engaged. In the working state, the support rod moves up and down along the guide hole.
8. The buoyancy-based slag removal device for a secondary sedimentation tank according to claim 7, characterized in that, The support rod is cylindrical.
9. The buoyancy-based slag removal device for a secondary sedimentation tank according to claim 1, characterized in that, It also includes two guide plates, which are connected to the top outer side of the float, with the free ends of the guide plates tilted downwards.
10. The buoyancy-based slag removal device for a secondary sedimentation tank according to any one of claims 1-9, characterized in that, It also includes a slag discharge pipe, one end of which is connected to the bottom of the float bucket, and the other end extends out of the wall of the secondary sedimentation tank.