A skimming device for a grit chamber

Abstract

The application relates to a skimming device for a grit chamber, and relates to the technical field of skimming pipes, which comprises a rack, a skimming pipe rotatably installed on the rack, a plurality of skimming pipes are arranged on the rack at intervals, a skimming opening is formed in each of the plurality of skimming pipes, a connecting assembly is used for connecting adjacent skimming pipes, a rotating assembly is installed on the rack and used for driving the skimming pipes to rotate on the rack, a lifting assembly is installed on one side of the rack and used for driving the skimming pipes to rotate on the rack, and a pushing assembly is installed on the skimming pipe and used for pushing oil stains in the skimming pipe out. The skimming pipe can adapt to different liquid level heights, after the oil stains enter the skimming pipe, the pushing assembly pushes the oil stains out from one end of the skimming pipe, the skimming pipe can change according to the liquid level change of the grit area, and the removal efficiency of the oil stains in the grit area is improved.

Description

Technical Field

[0001] This application relates to the field of skimming pipe technology, and in particular to a skimming device for a sedimentation tank. Background Technology

[0002] Currently, in the field of wastewater treatment, wastewater treatment generally goes through the following stages: After entering the wastewater treatment plant, the wastewater is first filtered through a coarse screen to remove large impurities; then it is filtered through a fine screen to remove small impurities; the filtered wastewater is then treated in sequence through a grit chamber, a biological treatment tank, a high-density tank, and a disinfection tank, and finally discharged into a water body.

[0003] For this type of floating debris, a skimming pipe is generally used to collect and remove it. When installing the pipe, the upper part of the skimming pipe should be higher than the highest liquid level to ensure that when oil removal is not required, the wastewater flows through the skimming pipe and out through the outlet weir. When oil removal is required, the skimming pipe is rotated to the upper opening and immersed in the highest liquid level. The oily wastewater is then discharged from the skimming pipe, thus achieving the purpose of oil removal.

[0004] Regarding the aforementioned technologies, the inventors believe that the existing skimming pipe opening is affected by the varying liquid levels in the settling sand zone, while the position of the skimming pipe remains fixed, thus impacting the oil removal efficiency in the settling sand zone. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a skimming device for a sedimentation tank, which solves the technical problem that the opening of the existing skimming pipe is affected by the high and low liquid level in the sedimentation zone, while the position of the skimming pipe is fixed, thus affecting the oil removal efficiency in the sedimentation zone.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A skimming device for a grit chamber includes: a frame on which skimming pipes are rotatably mounted, a plurality of skimming pipes being spaced apart on the frame, each skimming pipe having a skimming port; a connecting assembly for connecting adjacent skimming pipes; a rotating assembly mounted on the frame for driving the skimming pipes to rotate on the frame; a lifting assembly mounted on one side of the frame for driving the skimming pipes to rotate on the frame; and a pushing assembly mounted on the skimming pipes for pushing out oil sludge from within the skimming pipes.

[0008] Furthermore, the connecting assembly includes a first connecting plate and a second connecting plate, which are respectively connected to one end of the skimming pipe on the adjacent sides. A connecting bolt is provided on the first connecting plate, and one end of the connecting bolt passes through the first connecting plate and the second connecting plate in sequence. A nut is threadedly connected to the end of the connecting bolt that passes through the second connecting plate, and the nut is pressed against the second connecting plate.

[0009] Furthermore, the rotating assembly includes a worm gear and a worm. The worm gear is mounted on the skimming pipe. A drive motor is provided on one side of the frame. One end of the output shaft of the drive motor is connected to the worm, and the worm meshes with the worm gear.

[0010] Furthermore, a guide groove is provided on the output shaft of the drive motor, one end of the worm gear passes through the output shaft of the drive motor, and a limit plate is provided on the worm gear, the limit plate slidingly engaging with the guide groove.

[0011] Furthermore, the lifting assembly includes a lifting cylinder, which is mounted on one side of the frame, and one end of the piston rod of the lifting cylinder is connected to the frame.

[0012] Furthermore, the feeding assembly includes a feeding motor and a feeding screw. The feeding screw is rotatably mounted on the skimming tube, the feeding motor is mounted on the frame, and the output shaft of the feeding motor is connected to the feeding screw. A feeding plate is slidably installed inside the skimming tube along the axial direction, and the feeding plate is threadedly connected to the feeding screw.

[0013] Furthermore, one end of the skimming pipe is formed with a discharge port, which is connected to the skimming ports on a plurality of the skimming pipes.

[0014] In summary, this application includes at least one of the following beneficial technical effects of the skimming device for grit chambers:

[0015] 1. Several skimming pipes are connected together by a connecting component, and then the skimming pipes are installed on the frame. In use, the rotating component drives the skimming pipe to rotate on the frame, so that the skimming pipe rotates to the upper skimming port immersing in the highest liquid level. If the position of the skimming pipe is too high or too low, the lifting component drives the frame to lift or lower, so that the skimming pipe can adapt to different liquid levels. After the oil enters the skimming pipe, the pushing component pushes the oil out from one end of the skimming pipe, so that the skimming pipe can improve the oil removal efficiency of the settling sand zone according to the changes in the liquid level of the settling sand zone.

[0016] 2. By driving the worm gear and worm to rotate through the drive motor, and through the limit plate on the worm and the guide groove on the output shaft of the drive motor, the worm can also move up and down with the slag skimming pipe while driving the slag skimming pipe to rotate, thus improving the convenience of rotating and raising and lowering the slag skimming pipe.

[0017] 3. The lifting cylinder, pusher motor, and pusher screw drive the pusher plate to slide inside the skimming pipe, thereby improving the skimming pipe's efficiency in removing oil stains. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the main structure of the grit chamber and skimming pipe provided in this application;

[0019] Figure 2 This is a schematic diagram of the main slag skimming pipe structure provided in this application;

[0020] Figure 3 yes Figure 2 An enlarged view of part A;

[0021] Figure 4 This is a schematic diagram of the pusher plate structure mainly provided in this application;

[0022] Figure 5 This is a schematic diagram of the worm gear structure that is the main feature of this application.

[0023] Reference numerals: 1. Frame; 2. Skimming pipe; 21. Skimming port; 3. Connecting assembly; 31. First connecting plate; 32. Second connecting plate; 33. Connecting bolt; 34. Nut; 4. Rotating assembly; 41. Worm gear; 42. Worm; 43. Drive motor; 44. Guide groove; 45. Limiting plate; 5. Lifting assembly; 51. Lifting cylinder; 52. Rotating sleeve; 6. Pushing assembly; 61. Pushing motor; 62. Pushing screw; 63. Pushing plate; 64. Discharge port; 65. Guide rod. Detailed Implementation

[0024] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0026] This application discloses a skimming device for a sedimentation tank.

[0027] Reference Figures 1-2A skimming device for a grit chamber includes a frame 1 with a plurality of skimming pipes 2 rotatably mounted on the frame 1. Each skimming pipe 2 has a skimming port 21. A connecting assembly 3 is provided on each skimming pipe 2 to connect them. A rotating assembly 4 and a lifting assembly 5 are provided on the frame 1. The rotating assembly 4 drives the skimming pipes 2 to rotate, and the lifting assembly 5 drives the skimming pipes 2 to rise and fall. A pushing assembly 6 is provided on each skimming pipe 2 to push out oil sludge from within the skimming pipe 2.

[0028] Reference Figure 3 In use, the frame 1 is installed on the sedimentation tank where oil removal is required. The appropriate size of the skimming pipe 2 is selected based on the width of the sedimentation tank, and several skimming pipes 2 are connected end-to-end. To improve the ease of connection of the skimming pipes 2, a connecting assembly 3 is located between two adjacent skimming pipes 2. Furthermore, the connecting assembly 3 includes a first connecting plate 31 and a second connecting plate 32, which are circular in shape and coaxial with the corresponding skimming pipe 2. The first connecting plate 31 and the second connecting plate 32 are welded to the corresponding skimming pipe 2. A connecting bolt 33 is provided on the first connecting plate 31. One end of the connecting bolt 33 passes through the first connecting plate 31 and the second connecting plate 32 in sequence, and a nut 34 is threaded onto the end of the connecting bolt 33 passing through the second connecting plate 32. One end of the nut 34 is pressed against the second connecting plate 32, thus allowing several skimming pipes 2 to be connected end-to-end, and enabling the length of the skimming pipes 2 to adapt to sedimentation tanks of different lengths.

[0029] Reference Figures 4-5 To allow the skimming pipe 2 to rotate on the frame 1, the rotating assembly 4 includes a worm gear 41 and a worm 42. The worm gear 41 is mounted on one end of the skimming pipe 2. The worm 42 meshes with the worm gear 41, and one end of the worm 42 is rotatably mounted on the frame 1. To enable the worm 42 to drive the worm gear 41 to rotate, a drive motor 43 is installed on the sedimentation tank. One end of the output shaft of the drive motor 43 extends towards the side close to the worm 42. Since the skimming pipe 2 also needs to be raised and lowered, one end of the worm 42 is inserted into the output shaft of the drive motor 43, and the worm 42 and the output shaft of the drive motor 43 slide in the axial direction. Furthermore, a guide groove 44 is provided on the output shaft of the drive motor 43. Four sets of guide grooves 44 are spaced apart around the axis of the drive motor 43. A limit plate 45 is provided on the worm gear 42, corresponding to the guide groove 44. One end of the limit plate 45 is connected to the worm gear 42, and the other end passes into the guide groove 44, which guides the limit plate 45. When the worm gear 42 moves up and down with the frame 1, the limit plate 45 on the worm gear 42 slides along the guide groove 44. When the drive motor 43 drives the worm gear 42 to rotate, the limit plate 45 limits the rotation of the worm gear 42, allowing the output shaft of the drive motor 43 to drive the worm gear 42 to rotate.

[0030] The lifting assembly 5 includes lifting cylinders 51. Two sets of lifting cylinders 51 are spaced apart on both sides of the axial direction of the skimming pipe 2, and both sets of lifting cylinders 51 are installed on the sedimentation tank. The piston rod of one set of lifting cylinders 51 is connected to the frame 1, and a rotating sleeve 52 is installed at one end of the piston rod of the other set of lifting cylinders 51. The skimming pipe 2 is rotatably mounted on the rotating sleeve 52. This ensures that the lifting cylinders 51 do not affect the normal rotation of the skimming pipe 2.

[0031] Reference Figure 4 As oil continuously enters the skimming pipe 2, it accumulates, requiring workers to clean the skimming rollers to continue removing oil from the sedimentation tank surface. Therefore, the feeding assembly 6 includes a feeding motor 61 and a feeding screw 62. The feeding screw 62 is rotatably mounted on the skimming pipe 2, and the feeding motor 61 is also mounted on the skimming pipe 2, with one end connected to the feeding screw 62. A feeding plate 63 is slidably installed inside the skimming pipe 2, with one end of the feeding screw 62 passing through the feeding plate 63, and the feeding plate 63 is threadedly connected to the feeding screw 62. Furthermore, one end of the skimming pipe 2 has a discharge port 64. When oil accumulates in the skimming pipe 2, the drive motor 43 drives the skimming cylinder to rotate, causing the skimming port 21 to rotate away from the liquid surface. Then, the pusher motor 61 drives the pusher plate 63 to slide in the skimming pipe 2 through the pusher screw 62. After the pusher plate 63 pushes the oil in the skimming cylinder out of the discharge port 64, the skimming pipe 2 rotates again, immersing the skimming port 21 into the sedimentation tank.

[0032] To improve the stability of the pusher plate 63 sliding within the skimming tube 2, a guide rod 65 is provided inside the skimming tube 2. The guide rod 65 is arranged parallel to the screw at intervals, and one end of the guide rod 65 passes through the pusher plate 63. When the pusher plate 63 slides within the skimming tube 2, the guide rod 65 guides the pusher plate 63, thereby improving the stability of the pusher plate 63 sliding within the skimming tube 2.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A skimming device for a grit chamber, characterized in that, include: A frame (1) is provided, on which a skimming pipe (2) is rotatably mounted. Several skimming pipes (2) are spaced apart on the frame (1), and each of the several skimming pipes (2) is provided with a skimming port (21). A connecting component (3) is used to connect adjacent skimming pipes (2); Rotating assembly (4), which is mounted on the frame (1), is used to drive the skimming pipe (2) to rotate on the frame (1); Lifting assembly (5), which is installed on one side of the frame (1), is used to drive the skimming pipe (2) to rotate on the frame (1); A pusher assembly (6) is installed on the skimming pipe (2) and is used to push out the oil sludge in the skimming pipe (2).

2. The skimming device for a grit chamber according to claim 1, characterized in that, The connecting assembly (3) includes a first connecting plate (31) and a second connecting plate (32). The first connecting plate (31) and the second connecting plate (32) are respectively connected to one end of the skimming pipe (2) on the adjacent sides. A connecting bolt (33) is provided on the first connecting plate (31). One end of the connecting bolt (33) passes through the first connecting plate (31) and the second connecting plate (32) in sequence. A nut (34) is threadedly connected to one end of the connecting bolt (33) passing through the second connecting plate (32). The nut (34) abuts against the second connecting plate (32).

3. The skimming device for a grit chamber according to claim 1, characterized in that, The rotating assembly (4) includes a worm wheel (41) and a worm (42). The worm wheel (41) is mounted on the skimming pipe (2). A drive motor (43) is provided on one side of the frame (1). One end of the output shaft of the drive motor (43) is connected to the worm (42), and the worm (42) meshes with the worm wheel (41).

4. A skimming device for a grit chamber according to claim 3, characterized in that, The output shaft of the drive motor (43) is provided with a guide groove (44), one end of the worm (42) is inserted into the output shaft of the drive motor (43), and a limit plate (45) is provided on the worm (42), the limit plate (45) and the guide groove (44) are slidably engaged.

5. A skimming device for a grit chamber according to claim 1, characterized in that, The lifting assembly (5) includes a lifting cylinder (51), which is installed on one side of the frame (1), and one end of the piston rod of the lifting cylinder (51) is connected to the frame (1).

6. A skimming device for a grit chamber according to claim 1, characterized in that, The feeding assembly (6) includes a feeding motor (61) and a feeding screw (62). The feeding screw (62) is rotatably mounted on the skimming pipe (2). The feeding motor (61) is mounted on the frame (1), and the output shaft of the feeding motor (61) is connected to the feeding screw (62). A feeding plate (63) is slidably mounted inside the skimming pipe (2) along the axial direction. The feeding plate (63) is threadedly connected to the feeding screw (62).

7. A skimming device for a grit chamber according to claim 6, characterized in that, One end of the skimming pipe (2) is formed with a discharge port (64), and the discharge port (64) is connected to the skimming ports (21) on a plurality of the skimming pipes (2).

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