A dross skimming device

Abstract

The utility model belongs to sewage treatment technical field, specifically disclose a kind of scum skimming device, including skimming pipe and drive mechanism, the skimming pipe rotation is installed in secondary sedimentation tank, skimming pipe is opened with skimming port along its axial direction;The drive mechanism can drive the skimming pipe rotation to make the one side of skimming port lower than secondary sedimentation tank liquid level or drive the skimming pipe reverse rotation to make the skimming port higher than secondary sedimentation tank liquid level.The utility model can reduce space occupancy, realize the cleaning of the scum in buried secondary sedimentation tank.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a scum skimming device. Background Technology

[0002] Currently, in the process of treating sewage in underground sewage treatment plants, the secondary sedimentation tank is the core link in the sewage treatment system to achieve sludge-water separation, and its function directly affects the effluent quality and sludge return flow. However, in underground sewage treatment plants, the secondary sedimentation tank is located indoors. During the process of cleaning the scum in the secondary sedimentation tank, due to the significant space limitations of the underground secondary sedimentation tank, it is not possible to use scrapers and drive mechanisms to rotate the scrapers to scrape the scum from the surface of the secondary sedimentation tank, as is the case with traditional open-air secondary sedimentation tanks.

[0003] Therefore, a scum skimming device needs to be designed specifically for the secondary sedimentation tank in underground sewage treatment plants, which can meet the scum cleaning needs of underground secondary sedimentation tanks and adapt to the small space above the underground secondary sedimentation tanks. Utility Model Content

[0004] This utility model provides a scum skimming device, which aims to reduce space occupation and achieve the cleaning of scum in underground secondary sedimentation tanks.

[0005] This utility model is achieved through the following technical solution: a scum skimming device, including a skimming pipe and a driving mechanism, wherein the skimming pipe is rotatably installed in a secondary sedimentation tank, and the skimming pipe has a skimming port along its axial direction. The driving mechanism can drive the skimming pipe to rotate so that one side of the skimming port is lower than the liquid level in the secondary sedimentation tank, or drive the skimming pipe to rotate in the opposite direction so that the skimming port is higher than the liquid level in the secondary sedimentation tank.

[0006] Compared with existing technologies, this solution has the following advantages and beneficial effects: In this design, a skimming pipe can be installed inside the secondary sedimentation tank, reducing the space occupied by the tank's exterior. The design only requires a drive mechanism to rotate the skimming pipe forward and backward, controlling whether the skimming port on the pipe is below or above the liquid surface in the secondary sedimentation tank. This allows scum from the sedimentation tank surface to gradually enter the skimming pipe through the skimming port for treatment. Once the scum has been collected, the skimming pipe is reversed, moving the skimming port away from the liquid surface. At this point, no more water from the secondary sedimentation tank is discharged into the skimming pipe, preventing waste.

[0007] In this solution, the scum in the secondary sedimentation tank is cleaned by simply driving the scum-skimming pipe to rotate. Compared to the open-air secondary sedimentation tank, which requires scrapers to rotate circumferentially to scrape the scum, the scum-skimming device in this solution has a simpler structure. The scum-skimming pipe is located inside the secondary sedimentation tank, reducing space occupation. Furthermore, since the drive mechanism only needs to drive the scum-skimming pipe to rotate forward and backward, the drive mechanism structure does not need to be complex, and the space occupied by the drive mechanism during installation is also smaller.

[0008] Furthermore, the slag-skimming port is connected to multiple spacers, which are spaced apart along the axial direction of the slag-skimming tube.

[0009] In this design, multiple partitions are connected inside the skimming port, dividing a long skimming port into multiple skimming ports. Since secondary sedimentation tanks are usually quite large, directly opening a long skimming port on the skimming pipe would weaken the strength of the skimming pipe. The multiple partitions in this design can effectively reduce the weakening of the skimming pipe's strength.

[0010] Furthermore, a push plate is connected to one side of the skimming pipe, and the driving mechanism includes a power component and a connecting rod. One end of the connecting rod is connected to the power component, and the other end of the connecting rod is hinged to the push plate. The power component can drive the connecting rod to extend and retract, thereby causing the push plate to rotate.

[0011] In this design, a connecting push plate on one side of the skimming pipe provides a connection point for the skimming pipe to connect with the drive mechanism. In addition, the drive mechanism in this design includes a power component and a connecting rod. The connecting rod serves to connect the push plate, while the power component drives the connecting rod to extend and retract, thereby causing the push plate connected to it to swing, thus realizing the rotation of the skimming pipe.

[0012] In this solution, the drive mechanism has a simple structure, and the connection between it and the skimming pipe can be achieved simply by hinged connection via a push plate. The connection method is simple, which makes the whole structure simple and occupies little space.

[0013] Furthermore, a support is connected to the outside of the secondary sedimentation tank, and the power component is hinged to the support.

[0014] In this design, a connecting support is used outside the secondary sedimentation tank to provide an installation location for the power components, allowing them to be installed away from the ground. This maintains a dry environment for the power components and reduces the risk of them getting damp.

[0015] Furthermore, the area of ​​the skimming port is one-sixth of the circumference of the skimming tube.

[0016] This design ensures that scum can smoothly enter the skimming pipe from the skimming port, while also preventing the skimming pipe from becoming unstable due to an excessively large skimming port area.

[0017] Further, one end of the skimming pipe extends out of the secondary sedimentation tank and is communicated with a drain pipe.

[0018] In this solution, the arrangement of the drain pipe facilitates discharging the scum mixture in the skimming pipe to a designated position for collection and treatment.

[0019] Further, the utility model further comprises a controller and a detection member for detecting scum on the liquid surface of the secondary sedimentation tank, wherein the detection member is mounted on the top wall of the secondary sedimentation tank; the detection member and the driving mechanism are both electrically connected to the controller, the detection member transmits a signal to the controller, and the controller controls the driving mechanism to drive the skimming pipe to rotate.

[0020] In this solution, by arranging the detection member in the secondary sedimentation tank, the detection member, the driving mechanism and the controller are electrically connected, so that the linkage between the detection member and the driving mechanism is realized. The detection member detects the scum condition on the liquid surface of the secondary sedimentation tank, and feeds back a signal to the controller, so that the controller controls the action of the driving mechanism, thereby realizing intelligent identification of scum and intelligent driving of the rotation of the skimming pipe, and achieving the effect of automatic skimming. The solution is more automated, does not require manual observation and judgment, more meets the automation requirements of a sewage treatment plant in the sewage treatment process, improves efficiency, and saves labor costs.

[0021] Further, the detection member is a light sensor.

[0022] In the solution, the detection member is a light sensor, and the light sensor detects the presence or absence of scum through the water permeability of water, so as to send a signal to the controller, so that the controller controls the start of the driving mechanism.

[0023] Further, when the detection member detects that the scum on the liquid surface of the secondary sedimentation tank reaches a specified liquid level, the detection member sends a signal to the controller, and the controller controls the driving mechanism to drive the skimming pipe to rotate so that one side of the skimming port descends below the liquid level; when the detection member detects that there is no scum on the liquid surface of the secondary sedimentation tank, the controller controls the driving mechanism to drive the skimming pipe to rotate in the reverse direction so as to adjust the skimming port upward to leave the liquid level.

[0024] In the solution, the mutual cooperation of the detection member, the controller and the driving mechanism can effectively realize the smooth skimming effect and reset effect of the skimming pipe, has strong practicability and is more intelligent.

[0025] Further, a plurality of the detection members are provided, and the plurality of detection members are distributed at intervals along the axial direction of the skimming pipe.

[0026] The arrangement of a plurality of detection members can expand the detection range as much as possible and improve the detection accuracy. Description of Drawings

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a perspective view of the skimming pipe in an embodiment of a scum skimming device according to the present invention; Figure 2 This is a longitudinal cross-sectional view of the skimming pipe in the initial state of an embodiment of a scum skimming device of this utility model; Figure 3 This is a longitudinal cross-sectional view of an embodiment of a scum skimming device of the present invention, showing the skimming pipe rotating so that one side of the skimming port is below the liquid surface of the secondary sedimentation tank. Figure 4 This is a schematic diagram of the connection structure between the drive mechanism and the skimming pipe in an embodiment of a scum skimming device of this utility model; Figure 5 This is a longitudinal cross-sectional view of a scum skimming device according to the present invention, in which the skimming pipe is installed in the secondary sedimentation tank.

[0028] The attached diagram shows the markings and corresponding component names: 1. Skimming pipe; 2. Skimming port; 3. Spacer; 4. Push plate; 5. Hinge hole; 6. Connecting rod; 7. Support; 8. Power component; 9. Secondary sedimentation tank; 10. Drainage pipe; 11. Inspection port cover; 12. Handle; 13. Inspection component; 14. Hinge plate. Detailed Implementation

[0029] 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. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] like Figure 1-5As shown, this embodiment provides a scum skimming device, including a skimming pipe 1 and a driving mechanism. The skimming pipe 1 is rotatably installed in a secondary sedimentation tank 9. The skimming pipe 1 has a skimming port 2 along its axial direction, making the skimming port 2 elongated. In one embodiment, multiple partition bars 3 are connected inside the skimming port 2. The multiple partition bars 3 are distributed at intervals along the axial direction of the skimming pipe 1, and the multiple partition bars 3 divide a long skimming port 2 into multiple skimming ports 2.

[0032] However, since the secondary sedimentation tank 9 is usually quite large, if a long slag-skimming port 2 is directly opened on the slag-skimming pipe 1, it will weaken the strength of the slag-skimming pipe 1. In this embodiment, multiple spacers 3 are set, which can effectively reduce the weakening of the strength of the slag-skimming pipe 1. In this embodiment, the spacers 3 are integrally formed or welded to the slag-skimming pipe 1.

[0033] like Figure 5 As shown, when it is not necessary to skim the scum in the secondary sedimentation tank 9, the skimming port 2 on the skimming pipe 1 is located above the liquid surface of the secondary sedimentation tank 9, thereby ensuring that the liquid in the secondary sedimentation tank 9 will not flow into the skimming pipe 1.

[0034] like Figure 2 and Figure 3 As shown, the driving mechanism can drive the skimming pipe 1 to rotate so that one side of the skimming port 2 (i.e., the lowest side of the skimming port 2) is lower than the liquid surface of the secondary sedimentation tank 9, or drive the skimming pipe 1 to rotate in the opposite direction so that the skimming port 2 is higher than the liquid surface of the secondary sedimentation tank 9.

[0035] In one embodiment, such as Figure 1 As shown, a push plate 4 is connected to one side of the skimming pipe 1. The push plate 4 has an isosceles triangular structure and one side of the push plate 4 is an arc surface. This allows the side of the push plate 4 connected to the skimming pipe 1 to match the outer contour of the skimming pipe 1, making the connection between the push plate 4 and the skimming pipe 1 simpler and more stable.

[0036] In this embodiment, the push plate 4 is welded and fixed to one side of the skimming pipe 1. In this embodiment, the push plate 4 is located on the side of the skimming pipe 1 that is close to the secondary sedimentation tank 9. This makes it easier to set the drive mechanism on the side and avoid setting the drive mechanism in the middle of the secondary sedimentation tank 9, which would block the upper space of the secondary sedimentation tank 9.

[0037] In one embodiment, such as Figure 4 As shown, the driving mechanism includes a power component 8 and a connecting rod 6. One end of the connecting rod 6 is connected to the power component 8, and the other end of the connecting rod 6 is hinged to the push plate 4. The power component 8 can drive the connecting rod 6 to extend and retract, thereby causing the push plate 4 to rotate. In this embodiment, a hinge hole 5 is provided at one end of the push plate 4. The hinge hole 5 facilitates the hinged connection between the push plate 4 and the connecting rod 6. In this embodiment, a hinge plate 14 is hinged between the push plate 4 and the connecting rod 6, and the push plate 4 and the connecting rod 6 are hinged through the hinge plate 14.

[0038] In this embodiment, a support 7 is connected to the outside of the secondary sedimentation tank 9. The support 7 is fixedly installed on the ground outside the secondary sedimentation tank 9 by bolts. The power component 8 is hinged to the support 7. In one embodiment, the power component 8 is a cylinder, a hydraulic cylinder, or an electric telescopic rod. One end of the connecting rod 6 is connected to the telescopic end of the power component 8. The telescopic movement of the power component 8 causes the connecting rod 6 to telescopically move. During the telescopic movement of the connecting rod 6, the push plate 4 and the skimming pipe 1 will rotate, thereby making the skimming port 2 located below or away from the liquid surface.

[0039] In another embodiment, the power component 8 is an electric screw gate opener, which is existing technology. It includes a housing, screw, nut, reduction mechanism and motor, etc. The reduction mechanism can be a worm gear reducer or a gear reducer. The motor is mounted on the housing, and the reduction mechanism, screw and nut are mounted inside the housing. The housing is hinged to the support 7.

[0040] The motor is connected to the reduction mechanism via a coupling, converting the high-speed rotational power into a low-speed, high-torque output suitable for screw drive. The motor drives the worm gear and worm wheel through the coupling, reducing the rotational motion and increasing the torque before transmitting it to the screw. The rotation of the screw is converted into the linear motion of the nut (connected to the connecting rod 6), thereby realizing the lifting, lowering, and extending of the connecting rod 6, which in turn drives the push plate 4 and the skimming pipe 1 to rotate.

[0041] In one embodiment, such as Figure 2 As shown, the area of ​​the skimming port 2 is one-sixth of the circumference of the skimming tube 1. In this embodiment, the central angle of the skimming port 2 is 60 degrees. In the initial state, the angle between one side of the skimming port 2 of the skimming tube 1 and the horizontal plane is 37 degrees. In the initial state, the skimming port 2 of the skimming tube 1 is located above the liquid surface of the secondary sedimentation tank 9. At this time, the liquid in the secondary sedimentation tank 9 will not flow into the skimming tube 1.

[0042] like Figure 3 As shown, when the drive push plate 4 rotates the skimming pipe 1, one side of the skimming port 2 on the skimming pipe 1 descends below the liquid level of the secondary sedimentation tank 9, allowing the scum on the surface of the secondary sedimentation tank 9 to enter the skimming pipe 1 through the skimming port 2 with the water flow. In this embodiment, during skimming, the angle between one side of the skimming port 2 and the horizontal plane is 22 degrees. That is, when the drive push plate 4 and the skimming pipe 1 rotate 15 degrees clockwise in this embodiment, one side of the skimming port 2 is below the liquid level, and the distance between the skimming port 2 and the liquid level is small, allowing the scum on the water surface to enter the skimming pipe 1 while preventing a large amount of water from flowing into the skimming pipe 1. In practice, it is only necessary to lower one side of the skimming port 2 below the liquid level to allow the scum on the liquid surface to flow into the skimming pipe; therefore, the skimming port can be lowered to between 1-2 cm below the liquid level.

[0043] In one embodiment, such as Figure 5As shown, one end of the skimming pipe 1 extends out of the outer side of the secondary sedimentation tank 9 and is connected to the drain pipe 10. The drain pipe 10 is connected to the external equipment used to collect and treat scum, thereby playing the role of scum discharge.

[0044] In one embodiment, such as Figure 5 As shown, an inspection port is provided on the top cover of the secondary sedimentation tank 9. An inspection port cover plate 11 is installed inside the inspection port. A handle 12 is connected to the top of the inspection port cover plate 11 by screws. The inspection port cover plate 11 covers the inspection port to seal it. When it is necessary to carry out maintenance or observe the internal condition of the secondary sedimentation tank 9, the inspection port cover plate 11 can be opened by pulling the handle 12.

[0045] In one embodiment, such as Figure 5 As shown, a scum skimming device further includes a controller and a detection element 13 for detecting scum on the surface of the secondary sedimentation tank 9. The detection element 13 is installed on the top wall of the secondary sedimentation tank 9. The detection element 13 and the drive mechanism are both electrically connected to the controller. The detection element 13 transmits signals to the controller, and the controller controls the drive mechanism to drive the skimming pipe 1 to rotate. Specifically: In this embodiment, the detection element 13 is a light sensor. Specifically, the light sensor can be an existing infrared sensor. When an infrared beam shines on the water surface, the floating scum on the water surface will change the light propagation characteristics. The infrared sensor detects these changes to determine the presence of the floating scum.

[0046] When the detection element 13 detects that the scum on the surface of the secondary sedimentation tank 9 has reached the designated liquid level, the detection element 13 sends a signal to the controller. The controller then controls the drive mechanism to rotate the skimming pipe 1, causing one side of the skimming port 2 to descend below the liquid level. Figure 3 As shown; when the detection element 13 detects that there is no scum on the surface of the secondary sedimentation tank 9, the controller controls the drive mechanism to drive the skimming pipe 1 to rotate in the opposite direction, causing the skimming port 2 to be raised away from the liquid surface, as shown. Figure 2 As shown.

[0047] In one embodiment, an infrared sensor is installed in the upper part of the secondary sedimentation tank (tank 9). The infrared sensor detects the presence of scum by measuring the water permeability. In one embodiment, such as... Figure 5 As shown, in this embodiment, there are multiple detection elements 13, which are distributed at intervals along the axial direction of the skimming pipe 1. By installing an infrared sensor in the upper part of the pool, the scum situation at various locations in the secondary sedimentation tank 9 can be detected, with a wider detection range and more accurate detection. When there is a lot of scum, it is convenient to skim it off in time.

[0048] The infrared sensor is linked with the controller and drive mechanism to achieve linkage with the rotation of the skimming pipe 1. In one specific embodiment, when the scum is less than a preset distance from the bottom of the skimming opening 2 of the skimming pipe 1, the infrared sensor detects this and sends a signal to the controller. The controller then controls the drive mechanism to start, causing the connecting rod 6 to rotate the push plate 4 clockwise by 15 degrees, thereby causing the skimming pipe 1 to rotate clockwise. Figure 3 As shown, at this time, the skimming port 2 of the skimming pipe 1 is lowered to below the liquid surface of the secondary sedimentation tank 9. At this time, the scum on the liquid surface of the secondary sedimentation tank 9 will flow into the skimming pipe 1 from the skimming port 2 with the water flow to achieve the purpose of cleaning the scum on the liquid surface of the secondary sedimentation tank 9. When the infrared sensor detects that there is no scum in the liquid surface of the secondary sedimentation tank 9, the infrared sensor will send a signal to the controller, causing the controller to control the drive mechanism to drive the connecting rod 6 to reset downward, so that the push plate 4 and the skimming pipe 1 rotate counterclockwise by 15 degrees, thereby raising the skimming port 2 to be above the liquid level of the secondary sedimentation tank 9. At this time, the water in the secondary sedimentation tank 9 no longer flows into the skimming pipe 1.

[0049] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A scum skimming device, characterized in that, It includes a skimming pipe and a driving mechanism. The skimming pipe is rotatably installed in the secondary sedimentation tank, and the skimming pipe has a skimming port along its axial direction. The driving mechanism can drive the skimming pipe to rotate so that one side of the skimming port is lower than the liquid level in the secondary sedimentation tank, or drive the skimming pipe to rotate in the opposite direction so that the skimming port is higher than the liquid level in the secondary sedimentation tank.

2. The scum skimming device according to claim 1, characterized in that, The slag skimming port is connected to multiple spacers, which are spaced apart along the axial direction of the slag skimming tube.

3. The scum skimming device according to claim 1, characterized in that, A push plate is connected to one side of the skimming pipe. The driving mechanism includes a power component and a connecting rod. One end of the connecting rod is connected to the power component, and the other end of the connecting rod is hinged to the push plate. The power component can drive the connecting rod to extend and retract, thereby causing the push plate to rotate.

4. A scum skimming device according to claim 3, characterized in that, The secondary sedimentation tank is externally connected to a support, and the power component is connected to the support.

5. A scum skimming device according to claim 1, characterized in that, The area of ​​the slag-skimming opening is one-sixth of the circumference of the slag-skimming tube.

6. A scum skimming device according to claim 1, characterized in that, One end of the skimming pipe extends out of the outer side of the secondary sedimentation tank and is connected to a drain pipe.

7. A scum skimming device according to any one of claims 1-6, characterized in that, It also includes a controller and a detection device for detecting scum on the surface of the secondary sedimentation tank. The detection device is installed on the top wall of the secondary sedimentation tank. The detection device and the drive mechanism are both electrically connected to the controller. The detection device transmits signals to the controller, and the controller controls the drive mechanism to drive the skimming pipe to rotate.

8. A scum skimming device according to claim 7, characterized in that, The detection device is a light sensor.

9. A scum skimming device according to claim 7, characterized in that, When the detection device detects that the scum on the surface of the secondary sedimentation tank has reached the specified level, the detection device sends a signal to the controller. The controller controls the drive mechanism to drive the skimming pipe to rotate, causing one side of the skimming port to descend below the liquid level. When the detection device detects that there is no scum on the surface of the secondary sedimentation tank, the controller controls the drive mechanism to drive the skimming pipe to rotate in the opposite direction, causing the skimming port to rise and leave the liquid surface.

10. A scum skimming device according to claim 7, characterized in that, The detection element is provided in multiple parts, and the multiple detection elements are distributed at intervals along the axial direction of the skimming tube.

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