Dead-angle-free mud scraping device for sewage treatment

Abstract

The invention relates to the technical field of sewage treatment, and discloses a sewage treatment dead-corner-free mud scraping device which comprises a supporting seat, a rotating motor is fixedly connected to the center of the upper surface of the supporting seat, a rotating frame is fixedly connected to the output end of the rotating motor, and a sliding frame is slidably connected to the rotating frame in the vertical direction; a control assembly for controlling the sliding frame to ascend and descend is arranged on the rotating frame, scraping plates are symmetrically arranged at the two ends of the bottom of the sliding frame, the scraping plates are hinged to the bottom of the sliding frame, cleaning pieces are slidably connected to the scraping plates, cleaning plates are symmetrically arranged at the two ends of the sliding frame, and the cleaning plates are vertically arranged. The cleaning plate is slidably connected with the sliding frame in the horizontal direction, and a driving assembly for controlling the cleaning plate to be close to the side wall is arranged on the sliding frame. The device can realize dead-corner-free sludge scraping operation of the sludge tank, and has the effects of high applicability and good cleaning effect.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater treatment sludge scraping device with no dead angles. Background Technology

[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge into a water body or for reuse. The purification process usually involves first removing and filtering floating, suspended, and colloidal impurities from the wastewater, and finally cleaning up the sand and sludge that have settled at the bottom of the wastewater tank. Sludge scrapers are commonly used mechanical equipment in wastewater treatment to remove sludge that has settled at the bottom of sludge tanks.

[0003] Utility model patent CN222150996U discloses a sludge scraper for sewage treatment without dead angles, including a support frame. A drive motor is fixedly connected to the upper surface of the support frame, and a rotating shaft is fixedly connected to the output end of the drive motor. A scraper plate is fixedly connected to the bottom of the rotating shaft. A cleaning device is provided on the upper surface of the scraper plate. The cleaning device includes two symmetrically fixed plates, which are fixedly connected to the upper surface of the scraper plate. A servo motor is fixedly connected to the surface of one of the fixed plates. A reserved hole is opened on the arc surface of the rotating shaft. A screw is fixedly connected to the output end of the servo motor. The screw passes through the reserved hole. The cleaning device achieves the effect of cleaning the sludge on both sides of the scraper plate, preventing the sludge from sticking to the scraper plate.

[0004] However, in the above-mentioned device, the distance between the scraper and the top of the support is fixed, which can only be used for scraping sludge in sludge tanks of a specific height; at the same time, the scraper is set horizontally, which can only be used for scraping sludge in sludge tanks with flat bottoms, so the applicability of the device is not high. Summary of the Invention

[0005] The purpose of this invention is to provide a sludge scraping device for sewage treatment without dead angles, which can realize sludge scraping operation in sludge tanks without dead angles, and has the effects of high applicability and good cleaning effect.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a sludge scraping device for sewage treatment without dead angles, comprising a support base, a rotating motor fixedly connected to the center of the upper surface of the support base, a rotating frame fixedly connected to the output end of the rotating motor, a sliding frame slidably connected to the rotating frame along the vertical direction, a control component for controlling the lifting and lowering of the sliding frame provided on the rotating frame, scrapers symmetrically arranged at both ends of the bottom of the sliding frame, the scrapers being hinged to the bottom of the sliding frame, a cleaning component slidably connected to the scraper, cleaning plates symmetrically arranged at both ends of the sliding frame, the cleaning plates being vertically arranged, the cleaning plates being slidably connected to the sliding frame along the horizontal direction, and a drive component for controlling the cleaning plates to approach the side wall provided on the sliding frame.

[0007] By adopting the above technical solution, the device is fixed in the sludge tank by a support base. The control component controls the sliding frame to descend so that the scraper contacts the bottom of the sludge tank. Then, the drive component controls the cleaning plate to contact the side wall of the sludge tank. Subsequently, the rotating motor controls the rotating frame to drive the sliding frame to rotate, so that the scraper and the cleaning plate scrape the sludge at the bottom and side wall of the sludge tank respectively, thereby achieving sludge scraping treatment without dead angles in the sludge tank. At the same time, a cleaning component is designed to clean the sludge on both sides of the scraper, preventing sludge from sticking to the scraper and making the scraper unusable.

[0008] A further feature of the present invention is that: sliding plates are symmetrically arranged on the sliding frame, the sliding plates are slidably connected to the sliding frame in the horizontal direction, a connecting rod is fixedly connected to the cleaning plate, the connecting rod is horizontally arranged, the connecting rod passes through the sliding plate and is slidably connected to the sliding plate.

[0009] By adopting the above technical solution, the sliding plate is controlled to move horizontally, so that the cleaning plate contacts the side wall, which facilitates the scraping of mud from the side wall.

[0010] A further configuration of the present invention is as follows: the driving assembly includes screws symmetrically arranged at both ends of the sliding frame, the screws being horizontally arranged and collinear with the length direction of the scraper projection, the screws being threadedly connected to the sliding plate, and a first bevel gear being fixedly connected to one end of each of the two screws, a drive motor being fixedly connected to the sliding frame, and a second bevel gear being fixedly connected to the output end of the drive motor, the second bevel gear being located between the two first bevel gears and meshing with the first bevel gears.

[0011] By adopting the above technical solution, the drive motor controls the first bevel gear to rotate, and the second bevel gear drives the two screws to rotate, causing the two sliding plates to move synchronously in opposite directions along the screw direction, so that the two cleaning plates move towards the side wall respectively, thereby sticking tightly to the side wall.

[0012] A further feature of the present invention is that: a groove is formed on the upper surface of the scraper along its length direction, the cleaning component is embedded in the groove and the cleaning component is slidably connected to the groove, and cleaning blocks are provided at both ends of the cleaning component, the cleaning blocks are in contact with the side wall of the scraper, and the cleaning blocks are inclined towards the side wall of the scraper.

[0013] By adopting the above technical solution, the cleaning component slides in the chute, thereby cleaning both sides of the scraper and preventing sludge from accumulating on the scraper.

[0014] A further configuration of the present invention is as follows: the bottom of the sliding plate is hinged to the top of the cleaning component, the top of the cleaning component is fixedly connected to a rotating rod, the bottom of the sliding plate is provided with a waist hole, the rotating rod is located in the waist hole, and the width of the waist hole is longer than the width of the rotating rod.

[0015] By adopting the above technical solution, when the sliding plate reciprocates along the length of the screw under the action of the screw, it will drive the cleaning part to reciprocate along the chute direction on the scraper, thereby enabling the cleaning block to scrape sludge from both sides of the scraper. When the scraper flips to fit against the sludge tank with its bottom inclined, the distance between the cleaning part and the sliding plate changes. At this time, the design of the waist hole allows the cleaning part to always move in sync with the sliding plate. When the scraper flips, the cleaning part will tilt a small distance. Since the width of the waist hole is greater than the width of the rotating rod, it can provide a certain margin for the movement of the cleaning part.

[0016] A further configuration of the present invention is as follows: a vertical slide rail is provided in the rotating frame, the sliding frame is embedded in the slide rail and the sliding frame is slidably connected to the slide rail, the control component includes a lifting motor fixedly connected in the rotating frame, a threaded rod is fixedly connected to the output end of the lifting motor, the threaded rod is vertically arranged, and the sliding frame is threadedly connected to the threaded rod.

[0017] By adopting the above technical solution, the lifting motor is started, controlling the rotation of the threaded rod, so that the sliding frame can reciprocate in the vertical direction, thereby adjusting the height of the scraper.

[0018] A further feature of the present invention is that: a movable shaft is fixedly connected to the end of the scraper, the movable shaft is rotatably connected to the sliding frame, a gear is fixedly connected to the movable shaft, and a transmission assembly is provided on the sliding frame to control the rotation of the two gears and thus control the rotation of the two scrapers along the movable shaft.

[0019] By adopting the above technical solution, the transmission component controls the gear to rotate in the opposite direction, thereby controlling the scraper to flip along the movable shaft, so that the scraper can fit into the sludge tank that is inclined at the bottom, thus improving the applicability of the device.

[0020] A further embodiment of the present invention is that the transmission assembly includes a cylinder fixedly connected to a sliding frame, a drive rod fixedly connected to the output end of the cylinder, the drive rod being vertically arranged, and racks symmetrically arranged at both ends of the drive rod along its length direction, the racks meshing with gears.

[0021] By adopting the above technical solution, the cylinder drives the drive rod to move, thereby causing the two gears meshing with the rack to rotate, and the two scrapers to flip synchronously.

[0022] A further feature of the present invention is that a first spring is sleeved on the connecting rod, one end of the first spring is fixedly connected to the cleaning plate, and the other end is fixedly connected to the sliding plate.

[0023] By adopting the above technical solution, the first spring can control the cleaning plate to adhere to the side wall of the sludge tank to the maximum extent.

[0024] A further feature of the present invention is that the bottom of the cleaning plate is hollow, a telescopic plate is inserted into the bottom of the cleaning plate, the bottom of the telescopic plate is inverted triangular, and a second spring is provided between the telescopic plate and the cleaning plate, one end of the second spring is fixedly connected to the cleaning plate, and the other end is fixedly connected to the telescopic plate.

[0025] By adopting the above technical solution, when the sliding plate moves towards the sliding frame under the action of the screw, the telescopic plate at the bottom of the cleaning plate will come into contact with the scraper. At this time, the telescopic plate rises into the interior of the cleaning plate under the action of the scraper, ensuring that the cleaning plate will not interfere with the scraper when the cleaning component scrapes mud on both sides of the scraper.

[0026] The beneficial effects of this invention are:

[0027] 1. The present invention is fixed in the sludge tank by a support base. The control component controls the sliding frame to descend so that the scraper contacts the bottom of the sludge tank. Then the drive component controls the cleaning plate to contact the side wall of the sludge tank. Then the rotating motor controls the rotating frame to drive the sliding frame to rotate, so that the scraper and the cleaning plate scrape the bottom and side wall of the sludge tank respectively, thereby achieving sludge scraping treatment without dead angles in the sludge tank.

[0028] 2. In this invention, the sliding frame is controlled to rise and fall in the rotating frame by a threaded rod, thereby adjusting the height of the scraper and enabling the device to perform bottom scraping operations on sludge tanks of different depths. At the same time, the scraper is hinged to the sliding frame, and in sludge tanks with an inclined bottom, the scraper can tilt and fit against the bottom of the sludge tank, effectively improving the applicability of the device.

[0029] 3. In this invention, the sliding plate can reciprocate in the horizontal direction under the action of the screw, thereby driving the cleaning component to reciprocate on the scraper, so that the cleaning block can clean and scrape the sludge on both sides of the scraper, avoiding sludge from adhering to the scraper; at the same time, the sliding plate can control the contact between the cleaning plate and the side wall of the sludge tank, and under the action of the connecting rod and the first spring, it can control the cleaning plate to be in maximum contact with the side wall.

[0030] 4. When the scraper flips and fits against the sludge tank with its bottom inclined, the distance between the cleaning component and the sliding plate changes. At this time, the design of the waist hole allows the cleaning component to always move in line with the sliding plate. When the scraper flips, the cleaning component will tilt a small distance. Since the width of the waist hole is greater than the width of the rotating rod, it can provide a certain margin for the movement of the cleaning component, ensuring the cleaning effect of the cleaning block on the scraper.

[0031] 5. When the sliding plate moves towards the sliding frame under the action of the screw, the telescopic plate at the bottom of the cleaning plate will contact the scraper. At this time, the telescopic plate rises into the interior of the cleaning plate under the action of the scraper, ensuring that the cleaning plate will not interfere with the scraper when the cleaning component scrapes mud on both sides of the scraper. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the present invention.

[0034] Figure 2 yes Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0035] Figure 3 This is a schematic cross-sectional view of the present invention.

[0036] Figure 4 yes Figure 3 Enlarged schematic diagram of the structure at point B.

[0037] Figure 5 yes Figure 3 Enlarged schematic diagram of the structure at point C.

[0038] Figure 6 yes Figure 3 Enlarged schematic diagram of the structure at point D.

[0039] In the diagram, 1. Support base; 2. Rotating motor; 3. Rotating frame; 31. Slide rail; 4. Sliding frame; 5. Control assembly; 51. Lifting motor; 52. Threaded rod; 6. Scraper; 61. Slide groove; 7. Cleaning component; 71. Cleaning block; 72. Rotating rod; 8. Cleaning plate; 9. Drive assembly; 91. Screw; 92. First bevel gear; 93. Second bevel gear; 94. Drive motor; 10. Sliding plate; 101. Waist hole; 11. Connecting rod; 12. First spring; 13. Movable shaft; 14. Gear; 15. Transmission assembly; 151. Cylinder; 152. Drive rod; 153. Rack; 16. Telescopic plate; 17. Second spring. Detailed Implementation

[0040] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] Example: Please refer to Figure 1-6A sludge scraping device for wastewater treatment without dead angles includes a support base 1. A rotary motor 2 is fixedly connected to the center of the upper surface of the support base 1. A rotary frame 3 is fixedly connected to the output end of the rotary motor 2. A sliding frame 4 is slidably connected to the rotary frame 3 along the vertical direction. A control component 5 for controlling the lifting and lowering of the sliding frame 4 is provided on the rotary frame 3. Scrapers 6 are symmetrically arranged at both ends of the bottom of the sliding frame 4. The scrapers 6 are hinged to the bottom of the sliding frame 4. A cleaning component 7 is slidably connected to the scraper 6. Cleaning plates 8 are symmetrically arranged at both ends of the sliding frame 4. The cleaning plates 8 are vertically arranged and slidably connected to the sliding frame 4 along the horizontal direction. The device is equipped with a drive assembly 9 that controls the cleaning plate 8 to be close to the side wall. The device is fixed in the sludge tank by the support base 1. The control assembly 5 controls the sliding frame 4 to descend so that the scraper 6 contacts the bottom of the sludge tank. Then, the drive assembly 9 controls the cleaning plate 8 to contact the side wall of the sludge tank. Then, the rotating motor 2 controls the rotating frame 3 to drive the sliding frame 4 to rotate, so that the scraper 6 and the cleaning plate 8 scrape the bottom and side wall of the sludge tank respectively, thereby achieving sludge scraping treatment without dead angles in the sludge tank. At the same time, the cleaning component 7 is designed to clean the sludge on both sides of the scraper 6, so as to prevent the sludge from sticking to the scraper 6 and making the scraper 6 unusable.

[0042] Furthermore, symmetrical sliding plates 10 are arranged on the sliding frame 4, and the sliding plates 10 are slidably connected to the sliding frame 4 in the horizontal direction. A connecting rod 11 is fixedly connected to the cleaning plate 8. The connecting rod 11 is horizontally arranged, passes through the sliding plate 10, and is slidably connected to the sliding plate 10. The drive assembly 9 includes screws 91 symmetrically arranged at both ends of the sliding frame 4. The screws 91 are horizontally arranged and collinear with the length direction of the scraper 6. The screws 91 are threadedly connected to the sliding plate 10, and each of the two screws 91 is fixedly connected to a... A first bevel gear 92 is fixedly connected to a drive motor 94 on a sliding frame 4. A second bevel gear 93 is fixedly connected to the output end of the drive motor 94. The second bevel gear 93 is located between the two first bevel gears 92 and meshes with the first bevel gears 92. The drive motor 94 controls the first bevel gears 92 to rotate, and drives the two screws 91 to rotate through the second bevel gear 93. This causes the two sliding plates 10 to move synchronously in opposite directions along the screws 91, so that the two cleaning plates 8 move toward the side wall respectively, thus sticking tightly to the side wall and facilitating the scraping of mud from the side wall.

[0043] Furthermore, a groove 61 along its length is provided on the upper surface of the scraper 6. The cleaning component 7 is embedded in the groove 61 and is slidably connected to the groove 61. Cleaning blocks 71 are provided at both ends of the cleaning component 7. The cleaning blocks 71 are attached to the side wall of the scraper 6 and are inclined towards the side wall of the scraper 6. The cleaning component 7 slides in the groove 61, thereby cleaning both sides of the scraper 6 with the cleaning blocks 71, preventing sludge from accumulating on the scraper 6.

[0044] Furthermore, the bottom of the sliding plate 10 is hinged to the top of the cleaning component 7, and the top of the cleaning component 7 is fixedly connected to the rotating rod 72. The bottom of the sliding plate 10 has a waist hole 101, and the rotating rod 72 is located in the waist hole 101. The width of the waist hole 101 is longer than the width of the rotating rod 72. When the sliding plate 10 moves back and forth along the length of the screw 91 under the action of the screw 91, it will drive the cleaning component 7 to move back and forth on the scraper 6 along the direction of the slide groove 61, so that the cleaning block 71 scrapes the sludge on both sides of the scraper 6. When the scraper 6 flips and fits against the sludge pool with the bottom inclined, the distance between the cleaning component 7 and the sliding plate 10 changes. At this time, the design of the waist hole 101 can make the cleaning component 7 always follow the movement of the sliding plate 10. When the scraper 6 flips, the cleaning component 7 will tilt a small distance. Since the width of the waist hole 101 is greater than the width of the rotating rod 72, it can provide a certain margin for the movement of the cleaning component 7.

[0045] Furthermore, the rotating frame 3 is provided with a vertical slide rail 31, the sliding frame 4 is embedded in the slide rail 31 and is slidably connected to the slide rail 31, and the control component 5 includes a lifting motor 51 fixedly connected to the rotating frame 3, and a threaded rod 52 fixedly connected to the output end of the lifting motor 51. The threaded rod 52 is set vertically, and the sliding frame 4 is threadedly connected to the threaded rod 52. When the lifting motor 51 is started, it controls the threaded rod 52 to rotate, so that the sliding frame 4 can reciprocate in the vertical direction, thereby adjusting the height of the scraper 6.

[0046] Furthermore, a movable shaft 13 is fixedly connected to the end of the scraper 6. The movable shaft 13 is rotatably connected to the sliding frame 4. A gear 14 is fixedly connected to the movable shaft 13. A transmission assembly 15 is provided on the sliding frame 4 to control the rotation of the two gears 14 and thus control the rotation of the two scrapers 6 along the movable shaft 13. The transmission assembly 15 includes a cylinder 151 fixedly connected to the sliding frame 4. A drive rod 152 is fixedly connected to the output end of the cylinder 151. The drive rod 152 is vertically arranged. Racks 153 are symmetrically arranged at both ends of the drive rod 152 along its length direction. The racks 153 mesh with the gears 14. The cylinder 151 drives the drive rod 152 to move, thereby causing the two gears 14 meshing with the racks 153 to rotate, thereby controlling the scraper 6 to flip along the movable shaft 13, so that the scraper 6 can fit into the sludge tank with its bottom inclined, improving the applicability of the device.

[0047] Furthermore, a first spring 12 is sleeved on the connecting rod 11. One end of the first spring 12 is fixedly connected to the cleaning plate 8, and the other end is fixedly connected to the sliding plate 10. The first spring 12 can control the cleaning plate 8 to be in maximum contact with the side wall of the sludge tank.

[0048] Furthermore, the bottom of the cleaning plate 8 is hollow, and a telescopic plate 16 is inserted into the bottom of the cleaning plate 8. The bottom of the telescopic plate 16 is inverted triangular, and a second spring 17 is provided between the telescopic plate 16 and the cleaning plate 8. One end of the second spring 17 is fixedly connected to the cleaning plate 8, and the other end is fixedly connected to the telescopic plate 16. When the sliding plate 10 moves towards the sliding frame 4 under the action of the screw 91, the telescopic plate 16 at the bottom of the cleaning plate 8 will contact the scraper 6. At this time, the telescopic plate 16 rises into the interior of the cleaning plate 8 under the action of the scraper 6, ensuring that the cleaning plate 8 will not interfere with the scraper 6 when the cleaning component 7 is scraping mud on both sides of the scraper 6.

[0049] Working principle of this invention:

[0050] The device is fixed in the sludge tank by the support base 1. The lifting motor 51 is started, controlling the screw rod 52 to rotate, so that the sliding frame 4 can descend vertically, so that the scraper 6 contacts the bottom of the sludge tank. The drive motor 94 controls the first bevel gear 92 to rotate, which drives the two screws 91 to rotate through the second bevel gear 93, so that the two sliding plates 10 move synchronously in opposite directions along the screws 91, so that the two cleaning plates 8 move towards the side wall respectively, thus sticking to the side wall. The rotating motor 2 controls the rotating frame 3 to drive the sliding frame 4 to rotate, so that the scraper 6 and the cleaning plate 8 scrape the bottom and side wall of the sludge tank respectively, thereby achieving sludge scraping treatment without dead angles in the sludge tank. When the bottom of the sludge tank is set at an angle, the cylinder 151 controls the drive rod 152 to move, controls the gear 14 to rotate, so that the scraper 6 flips along the movable shaft 13, so that the scraper 6 can fit into the sludge tank with the bottom set at an angle.

[0051] When it is necessary to clean the sludge on both sides of the scraper 6, the drive cylinder 151 drives the two screws 91 to rotate through the first bevel gear 92 and the second bevel gear 93, thereby causing the sliding plate 10 to drive the cleaning component 7 to reciprocate along the length of the scraper 6 to perform the sludge scraping operation.

Claims

1. A sludge scraping device for sewage treatment without dead angles, comprising a support base (1), characterized in that: A rotating motor (2) is fixedly connected to the upper surface of the support base (1). A rotating frame (3) is fixedly connected to the output end of the rotating motor (2). A sliding frame (4) is slidably connected to the rotating frame (3) in the vertical direction. A control component (5) for controlling the lifting and lowering of the sliding frame (4) is provided on the rotating frame (3). Scrapers (6) are symmetrically arranged at both ends of the bottom of the sliding frame (4). The scrapers (6) are hinged to the bottom of the sliding frame (4). A cleaning component (7) is slidably connected to the scraper (6). Cleaning plates (8) are symmetrically arranged at both ends of the sliding frame (4). The cleaning plates (8) are vertically arranged. The cleaning plates (8) are slidably connected to the sliding frame (4) in the horizontal direction. A drive component (9) for controlling the cleaning plates (8) near the side wall is provided on the sliding frame (4).

2. The sludge scraping device for sewage treatment without dead angles according to claim 1, characterized in that: The sliding frame (4) is symmetrically provided with sliding plates (10), the sliding plates (10) and the sliding frame (4) are slidably connected in the horizontal direction, and the cleaning plate (8) is fixedly connected with a connecting rod (11), the connecting rod (11) is horizontally provided, the connecting rod (11) passes through the sliding plate (10) and the connecting rod (11) is slidably connected to the sliding plate (10).

3. The sludge scraping device for sewage treatment without dead angles according to claim 2, characterized in that: The drive assembly (9) includes screws (91) symmetrically arranged at both ends of the sliding frame (4). The screws (91) are horizontally arranged and the length direction of the screws (91) and the scraper (6) are collinear. The screws (91) are threadedly connected to the sliding plate (10). A first bevel gear (92) is fixedly connected to one end of each of the two screws (91). A drive motor (94) is fixedly connected to the sliding frame (4). A second bevel gear (93) is fixedly connected to the output end of the drive motor (94). The second bevel gear (93) is located between the two first bevel gears (92) and meshes with the first bevel gears (92).

4. The wastewater treatment sludge scraping device without dead angles according to claim 2, characterized in that: The upper surface of the scraper (6) is provided with a groove (61) along its length direction. The cleaning component (7) is embedded in the groove (61) and is slidably connected to the groove (61). Cleaning blocks (71) are provided at both ends of the cleaning component (7). The cleaning blocks (71) are attached to the side wall of the scraper (6) and are inclined towards the side wall of the scraper (6).

5. A sludge scraping device for wastewater treatment without dead angles according to claim 4, characterized in that: The bottom of the sliding plate (10) is hinged to the top of the cleaning component (7), and the top of the cleaning component (7) is fixedly connected to the rotating rod (72). The bottom of the sliding plate (10) is provided with a waist hole (101), and the rotating rod (72) is located in the waist hole (101), and the width of the waist hole (101) is longer than the width of the rotating rod (72).

6. The sludge scraping device for sewage treatment without dead angles according to claim 1, characterized in that: The rotating frame (3) is provided with a vertical slide rail (31), the sliding frame (4) is embedded in the slide rail (31) and the sliding frame (4) is slidably connected to the slide rail (31), the control component (5) includes a lifting motor (51) fixedly connected in the rotating frame (3), the output end of the lifting motor (51) is fixedly connected to a threaded rod (52), the threaded rod (52) is vertically arranged, and the sliding frame (4) is threadedly connected to the threaded rod (52).

7. The sludge scraping device for sewage treatment without dead angles according to claim 1, characterized in that: The end of the scraper (6) is fixedly connected to a movable shaft (13), the movable shaft (13) is rotatably connected to the sliding frame (4), a gear (14) is fixedly connected to the movable shaft (13), and a transmission assembly (15) is provided on the sliding frame (4) to control the rotation of the two gears (14) and thus control the rotation of the two scrapers (6) along the movable shaft (13).

8. The sludge scraping device for sewage treatment without dead angles according to claim 7, characterized in that: The transmission assembly (15) includes a cylinder (151) fixedly connected to the sliding frame (4). The output end of the cylinder (151) is fixedly connected to a drive rod (152). The drive rod (152) is vertically arranged. The two ends of the drive rod (152) are symmetrically arranged with racks (153) along its length direction. The racks (153) mesh with gears (14).

9. A sludge scraping device for sewage treatment without dead angles according to claim 2, characterized in that: A first spring (12) is sleeved on the connecting rod (11). One end of the first spring (12) is fixedly connected to the cleaning plate (8), and the other end is fixedly connected to the sliding plate (10).

10. A sludge scraping device for wastewater treatment without dead angles according to claim 1, characterized in that: The bottom of the cleaning plate (8) is hollow, and a telescopic plate (16) is inserted into the bottom of the cleaning plate (8). The bottom of the telescopic plate (16) is in the shape of an inverted triangle. A second spring (17) is provided between the telescopic plate (16) and the cleaning plate (8). One end of the second spring (17) is fixedly connected to the cleaning plate (8), and the other end is fixedly connected to the telescopic plate (16).

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