Center drive mud scraper

Abstract

The utility model relates to sewage treatment technical field, and specifically is a kind of center drive mud scraper, including working bridge and the drive device of upper portion being arranged therein, the transmission shaft being connected with drive device and bottom mud scraping assembly, transmission shaft is the jacket structure with inner cavity, its outer ring is equipped with steel pipe, and cavity is formed between steel pipe and transmission shaft as the passage of sewage flowing from bottom to top, and the bottom of working bridge is fixedly connected with flow stabilizer, and the inside of flow stabilizer is provided with the multistage buffer structure that is synchronous with transmission shaft rotation, and the upper portion of transmission shaft is equipped with water outlet groove in circumference, so that sewage is evenly flowed into the inside of flow stabilizer along radial direction, and central concentrated impact is avoided.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically a center-driven sludge scraper. Background Technology

[0002] A center-driven sludge scraper typically consists of a working bridge, drive unit, drive shaft, flow stabilizer, underwater bearing, and scraping device. Wastewater passes through the central flow stabilizer and flows steadily from the top. The sludge gradually settles to the bottom of the tank. The drive shaft rotates the scraping device, scraping the settled sludge into a sludge collection pit in the tank. However, this inlet method has the following drawbacks: the wastewater enters the flow stabilizer in one direction and then moves rapidly downwards. This results in uneven circumferential distribution of sludge within the flow stabilizer, leading to uneven circumferential sedimentation and uneven concentration of the supernatant. Furthermore, the rapid sedimentation of the wastewater impacts the sludge at the bottom of the tank, causing it to float to the surface and affecting the sedimentation effect.

[0003] Therefore, this utility model provides a center-driven sludge scraper. Utility Model Content

[0004] To address the aforementioned shortcomings, this invention provides a center-driven sludge scraper that distributes water more evenly within the flow stabilizer, effectively reducing the impact on the pool bottom, preventing sludge from floating, and enabling the scraper to operate efficiently.

[0005] To solve the above-mentioned technical problems, the present utility model adopts the following technical solution: a center-driven sludge scraper, including a working bridge and a driving device set in the upper part, a transmission shaft connected to the driving device, and a bottom sludge scraping assembly. The transmission shaft is a jacket structure with an inner cavity, and a steel pipe is provided on its outer ring. The steel pipe and the transmission shaft form a cavity as a channel for sewage to flow from bottom to top. A flow stabilizer is fixedly connected to the bottom of the working bridge. The flow stabilizer is provided with a multi-stage buffer structure that rotates synchronously with the transmission shaft. A water outlet groove is provided circumferentially on the upper part of the transmission shaft so that sewage flows into the flow stabilizer evenly in the radial direction, avoiding concentrated impact at the center. A water inlet structure adapted to the sliding bearing at the bottom of the pool is connected to the bottom. The water inlet structure includes a sewage channel set between the housing of the sliding bearing and the bushing, and a water inlet pipe outlet adapted to the lower end of the sliding bearing.

[0006] Furthermore, the multi-stage buffer structure includes a buffer trough located on the upper part of the drive shaft. The buffer trough is a thin-walled cylinder with an open top. Wastewater enters the buffer trough radially from the outlet trough and flows downward through the first outlet evenly distributed around the bottom plate, achieving initial diffusion and deceleration.

[0007] Furthermore, the multi-stage buffer structure also includes a distribution trough located below the buffer tank. The distribution trough includes a frustum-shaped buffer body and an upper water distribution ring. The surface of the buffer body is provided with a second outlet, which allows sewage to fall evenly along the circumference. The water distribution ring is provided with a third outlet, which allows some sewage to diffuse outward along the inclined surface of the buffer body, forming a planar distribution and avoiding point impact.

[0008] Furthermore, the water outlet of the drive shaft is located within the height range of the buffer tank, allowing sewage to flow radially into the buffer tank.

[0009] Furthermore, the diameter of the distribution trough is 1.3 to 2 times that of the buffer trough, ensuring that the sewage is fully received and evenly distributed.

[0010] Compared with the prior art, the technical solution of this utility model has the following beneficial effects: This utility model provides a center-driven sludge scraper. On one hand, by using a jacketed drive shaft, the water inlet direction changes from top to bottom to bottom to top, and the water outlet is located around the perimeter, making the water distribution within the flow stabilizing cylinder more uniform. On the other hand, by setting up buffer tanks and distribution tanks (multi-stage buffer structure), the water inlet becomes more uniform, effectively reducing the impact on the bottom of the tank, preventing sludge from floating, and enabling the sludge scraper to operate efficiently. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a front view of the distribution groove structure of this utility model; Figure 3 This is a top view of the distribution groove structure of this utility model; Figure 4 yes Figure 2 Schematic diagram of the unfolded water ring structure of Zhongbu; Figure 5 This is a three-dimensional schematic diagram of the buffer groove, distribution groove and transmission shaft of this utility model.

[0013] In the diagram: 1. Flow stabilizer; 2. Buffer tank; 21. First outlet; 3. Working bridge; 4. Drive unit; 5. Distribution tank; 51. Buffer body; 52. Water distribution ring; 53. Second outlet; 54. Center hole; 55. Third outlet; 6. Drive shaft; 61. Outlet trough; 7. Tie rod; 8. Scraper arm; 9. Sludge scraper; 10. Center scraper; 11. Sliding bearing; 12. Inlet pipe. Detailed Implementation

[0014] To make the technical means, technical 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.

[0015] Example: Figures 1-5 As shown, the center-driven sludge scraper of this utility model mainly includes a working bridge 3, a driving device 4, a transmission shaft 6, a flow stabilizer 1, and a multi-stage buffer structure. The working bridge 3 spans above the sedimentation tank, with the driving device 4 installed on the upper part. The driving device 4 is connected to the upper end of the transmission shaft 6 through a coupling, and the lower end of the transmission shaft 6 is supported on the bottom of the tank by a sliding bearing 11.

[0016] like Figure 1 As shown, the drive shaft 6 adopts a special jacket structure, with an outer steel pipe and an inner solid shaft. An annular cavity is formed between the two as a sewage channel. The inlet pipe 12 is connected to the lower end of the sliding bearing 11 through a rubber sealing ring. There are 8 vertical flow channels evenly distributed along the circumference between the outer shell of the sliding bearing 11 and the bushing. Each flow channel has a rectangular cross section of 20mm×30mm.

[0017] The water inlet structure is implemented as follows: the water inlet pipe 12 adopts a DN150 flange interface and is connected to the lower end of the sliding bearing 11 through a rubber sealing ring; there are 8 vertical flow channels evenly distributed along the circumference between the outer shell and the bushing of the sliding bearing 11, and each flow channel has a rectangular cross section of 20mm×30mm.

[0018] In this embodiment, the drive device 4 is located on the upper part of the working bridge 3, the upper end of the drive shaft 6 is connected to the lower end of the drive device 4, the lower end of the drive shaft 6 is adapted to the sliding bearing 11, and the sliding bearing 11 is located at the bottom of the pool; the flow stabilizer 1 is located below the working bridge 3 and is coaxially sleeved on the outside of the drive shaft 6; the scraper arm 8 is located on the drive shaft 6, and the pull rod 7 connects the scraper arm 8 and the drive shaft 6; the buffer groove 2 and the distribution groove 5 are respectively located on the drive shaft 6 from top to bottom, and are both located inside the flow stabilizer 1.

[0019] During operation, the drive shaft 6 drives the scraper arm 8 to rotate synchronously. When the scraper arm 8 rotates, the scraper plate 9 connected to it (the scraper plate 9 is set in the conventional inclined design in the prior art) scrapes the sludge deposited at the bottom of the pool from the bottom of the pool to the central sludge collection pit. A central scraper plate 10 is set in the central sludge collection pit and connected to the scraper arm 8. The scraper arm 8 drives the central scraper plate 10 to rotate simultaneously, stirring the sludge in the central sludge collection pit so that the sludge can be discharged smoothly.

[0020] In this embodiment, the drive shaft 6 is a jacket containing an inner cavity, and the outer ring of the drive shaft 6 is provided with a steel pipe. There is a cavity between the steel pipe and the drive shaft 6, and the cavity serves as a sewage channel for upward movement. The outer shell of the sliding bearing 11 and the bushing are provided with a channel for the upward flow of sewage.

[0021] In this embodiment, the outlet of the inlet pipe 12 is adapted to the lower end of the sliding bearing 11 to ensure that all sewage flows into the cavity of the drive shaft 6 through the sleeve of the sliding bearing 11; the upper outer shell of the drive shaft 6 is provided with a plurality of outlet grooves 61, and the sewage moving from bottom to top in the drive shaft 6 flows out from the outlet grooves 61.

[0022] In this embodiment, the buffer tank 2 is a thin-walled cylindrical cavity with an open top. The inner diameter of its bottom plate is adapted to the drive shaft 6 to ensure that the buffer tank 2 and the drive shaft 6 rotate synchronously. The water outlet 61 of the drive shaft 6 is located inside the buffer tank 2 in the height direction to ensure that all sewage flows into the buffer tank 2 in the circumferential direction. The sewage flows into the buffer tank 2 from the circumferential direction to avoid impact on the lower sludge and to prevent the sludge at the bottom of the tank from floating.

[0023] like Figure 5 As shown, the bottom plate of the buffer tank 2 is set horizontally, and several first outlets 21 are provided on the bottom plate. The sewage inside the buffer tank 2 flows downward in the circumferential direction through the first outlets 21. Since the sewage flow area is large and uniform, it effectively reduces the impact of sewage on the sludge below, thereby preventing the sludge from floating.

[0024] like Figure 2 and Figure 3 As shown, the distribution trough 5 includes a buffer body 51, a water distribution ring 52, a second water outlet 53, a central hole 54, and a third water outlet 55. The buffer body 51 is a thin-walled frustum with a central hole and vertical connection. The diameter of the upper end of the buffer body 51 is smaller than the diameter of the lower end. The central hole 54 is provided in the middle of the buffer body 51. The water distribution ring 52 is located on the upper part of the outer ring of the buffer body 51. The water distribution ring 52 is a thin-walled hollow cylinder. The central hole 54 is adapted to the drive shaft 6 to ensure that the distribution trough 5 and the drive shaft 6 rotate synchronously. The upper part of the distribution trough 5 forms a space bounded by the water distribution ring 52.

[0025] In this embodiment, the diameter of the distribution trough 5 is 1.3 to 2 times the diameter of the buffer trough 2, so as to ensure that all the sewage in the buffer trough 2 falls into the distribution trough 5 under the action of gravity.

[0026] Preferably, the frustum-shaped surface of the buffer body 51 is provided with several second outlets 53. When the sewage falling from the first outlet 21 of the buffer tank 2 falls onto the buffer body 51 above the distribution tank 5, it is buffered again, further reducing the impact on the sludge below. A portion of the sewage flows downward through the second outlets 53. Since the second outlets 53 are evenly distributed, after two buffering cycles, a portion of the sewage falls evenly and slowly in the circumferential direction, without impacting the sludge below.

[0027] Preferably, the lower end of the water distribution ring 52 is provided with several third outlets 55 in the circumferential direction. After the sewage from the drive shaft 6 falls into the distribution tank 5, a portion of the sewage will slowly move outward and downward in the circumferential direction from the third outlets 55 inside the flow stabilizer 1. This flow mode is to flow outward and downward along the upper surface of the buffer body 51, thereby improving the flow of sewage inside the flow stabilizer 1, expanding the range of sewage outward flow, and changing the downward flow of sewage from the traditional point flow to a surface downward flow, so that the sewage will not generate violent downward movement and avoid impact on the lower sludge.

[0028] The working process of a center-driven sludge scraper of this utility model is as follows: First, the sewage in the inlet pipe 12 flows from bottom to top into the cavity of the drive shaft 6 through the sleeve of the sliding bearing 11 at the bottom of the pool. Then, it flows outward in the circumferential direction from the outlet trough 61 of the slowly rotating drive shaft 6 into the cavity of the buffer trough 2 to avoid impact on the lower sludge and prevent the sludge at the bottom of the pool from floating.

[0029] Then, after being buffered in the buffer tank 2, the sewage flows downward in a circumferential direction through the first outlet 21. Due to the large and uniform flow area of ​​the sewage, the impact of the sewage on the lower sludge is effectively reduced, thereby preventing the sludge from floating.

[0030] When the sewage falls onto the buffer body 51 at the top of the distribution tank 5, it is buffered again, further reducing the impact on the sludge below.

[0031] Subsequently, a portion of the sewage flows vertically downward through the second outlet 53. Because the second outlet 53 is evenly distributed, the sewage, after two buffering processes, falls evenly and slowly in the circumferential direction, without impacting the sludge below.

[0032] Meanwhile, another portion of the sewage flows slowly outward and downward from the third outlet 55 inside the flow stabilizer 1 in a circumferential direction, thereby improving the flow of sewage inside the flow stabilizer 1, expanding the range of sewage downward flow, and changing the sewage downward flow from the traditional point flow to a surface downward flow, so that the sewage will not generate violent downward movement and avoid impact on the lower sludge.

[0033] Finally, after the denser sludge settles to the bottom of the pool, the scraper 9 rotates synchronously with the scraper arm 8, scraping the sludge deposited at the bottom of the pool from the bottom to the central sludge collection pit. The scraper arm 8 rotates simultaneously with the central scraper 10, stirring the sludge in the central sludge collection pit, so that the sludge can be discharged smoothly.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A center-driven sludge scraper, comprising a working bridge (3) and a drive device (4) disposed at its upper part, characterized in that: The drive device (4) is fixedly connected to a drive shaft (6) at the bottom. The drive shaft (6) is a jacket structure with an inner cavity. A steel pipe is provided on its outer ring. A cavity is formed between the steel pipe and the drive shaft (6) as a channel for sewage to flow from bottom to top. The working bridge (3) is fixedly connected to a flow stabilizer (1) at the bottom. The flow stabilizer (1) is provided with a multi-stage buffer structure that rotates synchronously with the drive shaft (6). A sludge scraper assembly is connected to the bottom of the drive shaft (6).

2. The center-driven sludge scraper according to claim 1, characterized in that: The multi-stage buffer structure includes a buffer groove (2) and a distribution groove (5) respectively arranged on the drive shaft (6) from top to bottom, so that the sewage is evenly distributed after being buffered twice.

3. A center-driven sludge scraper according to claim 2, characterized in that: The buffer tank (2) is a thin-walled cylinder with an open top. Its bottom plate is horizontally set and has a first water outlet (21) evenly distributed around its circumference. The water outlet (61) of the drive shaft (6) is located within the height range of the buffer tank (2).

4. A centre drive mud scraper according to claim 3, characterised in that: The distribution trough (5) includes a frustum-shaped buffer body (51) and an upper water distribution ring (52). The buffer body (51) is provided with a second water outlet (53), and the water distribution ring (52) is provided with a third water outlet (55).

5. A center-driven sludge scraper according to claim 4, characterized in that: The buffer body (51) is a thin-walled frustum with a smaller top and a larger bottom, and the second outlet (53) evenly distributed on its surface causes the sewage to fall evenly in the circumferential direction.

6. A center-driven sludge scraper according to claim 4, characterized in that: The third outlet (55) of the water distribution ring (52) causes the sewage to flow outward and downward along the upper surface of the buffer body (51).

7. A center-driven sludge scraper according to claim 2 or 3, characterized in that: The diameter of the distribution groove (5) is 1.3 to 2 times the diameter of the buffer groove (2).

8. A center-driven sludge scraper according to claim 1, characterized in that: The sludge scraping assembly includes a scraper arm (8) connected to the bottom of the drive shaft (6), and a scraper blade (9) and a center scraper blade (10) fixedly connected to the scraper arm (8).

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