Skimming plate structure of single-pipe suction dredger

Abstract

The utility model discloses a skimming plate structure of a single-pipe suction dredger, which comprises a cylindrical pool body, an effluent weir, a truss, a skimming plate, a central upright post and a driving unit, the central upright post is arranged in the center of the cylindrical pool body, the effluent weir is arranged along the edge of the cylindrical pool body, the skimming plate is arranged on the truss, and the driving unit is arranged on the truss. The skimming plate and the truss are both connected with the driving unit so as to rotate around the central stand column under the driving of the driving unit; and the skimming plate is sequentially provided with an arc section, a straight line section and a deslagging hopper section from the central upright post to the effluent weir. The surface scum pushing device is divided into the arc section, the linear section and the scum discharging hopper section, and the moving directions of the three sections and the water surface form different angles, so that surface scum is quickly and effectively pushed into the scum discharging hopper; the structure is simple, economical, practical and convenient to popularize.

Description

Technical Field

[0001] This utility model specifically relates to a slag skimming plate structure for a single-tube sludge suction machine. Background Technology

[0002] The secondary sedimentation tank in a wastewater treatment plant is a crucial component of the activated sludge system. Its main functions include sludge-water separation, clarified water discharge, sludge sedimentation, thickening, and return to the biological treatment tank. The performance of the secondary sedimentation tank directly affects the effluent quality and the concentration of returned sludge in the activated sludge system. In large and medium-sized wastewater treatment plants, circular radial flow sedimentation tanks with mechanical sludge suction are commonly used. Among these, the peripheral influent and peripheral effluent radial flow sedimentation tank is a common type, requiring a center-driven single-tube sludge suction machine.

[0003] The existing center-driven single-pipe sludge suction machine uses a center-driven method. Wastewater first enters the peripheral distribution tank and flows evenly into the pool through the distribution holes at the bottom of the tank. Under the action of the peripheral baffles, the water flows from the bottom of the pool to the center, while the sludge settles at the bottom of the pool by its own weight, forming a mud-water separation. The drive unit drives the central vertical frame to rotate, which in turn drives the scraper arm and the sludge suction pipe to rotate. Under the action of hydrostatic pressure, the sludge enters evenly into the suction ports arranged on the suction pipe, and then is discharged out of the pool through the central sludge discharge well. The scum on the water surface is skimmed to the edge of the pool by the skimmer plate, and then scraped into the scum discharge hopper by the scraper rake and discharged out of the pool.

[0004] However, the existing center-driven single-tube sludge suction machine has a skimming plate designed as a straight line, welded and fixed to the upper end of the truss. During the sludge suction machine's rotation, the skimming plate remains perpendicular to the water surface, preventing surface scum from being effectively guided to the scum discharge hopper at the pool edge. This design limits skimming efficiency and requires further optimization to improve skimming performance. Utility Model Content

[0005] The purpose of this utility model is to provide a slag skimming plate structure for a single-tube sludge suction machine.

[0006] The technical solution of this utility model is as follows:

[0007] A slag skimmer structure for a single-tube sludge suction machine includes a cylindrical pool, an outlet weir, a truss, a slag skimmer, a central column, and a drive unit. The central column is located in the center of the cylindrical pool, the outlet weir is arranged along the edge of the cylindrical pool, and the slag skimmer is located on the truss. Both the slag skimmer and the truss are connected to the drive unit so that they can rotate around the central column under the drive of the drive unit.

[0008] The slag skimmer is provided with an arc segment, a straight line segment, and a slag hopper segment in sequence from the central column to the outlet weir. Let R be the distance from the outlet weir to the center of the cylindrical pool. The radius of the arc segment is 1 / 3R and the arc degree is 90°. Taking the direction of the truss from the center to the edge of the cylindrical pool as the reference line, the vertical line connecting the starting end of the arc segment to the central axis of the cylindrical pool forms an angle of 154° with the reference line. The direction of the straight line segment forms an angle of 27° with the reference line. The direction of the slag hopper segment forms an angle of 8° with the reference line. The direction of the straight line segment forms an angle of 161° with the direction of the slag hopper segment.

[0009] In a preferred embodiment of the present invention, a plurality of horizontal support rods are provided on the straight section of the skimming plate, and a plurality of vertical support rods adapted and connected to the plurality of horizontal support rods are provided on the truss.

[0010] In a preferred embodiment of this utility model, the free end of the slag discharge hopper section is provided with an elastic element to make close contact with the water outlet weir and avoid slag leakage.

[0011] More preferably, the elastic element is a rubber sheet.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model is divided into three parts: a circular arc section, a straight line section, and a slag discharge hopper section. The three parts operate at different angles to the water surface, thereby quickly and effectively pushing the surface scum into the slag discharge hopper.

[0014] 2. This utility model has a simple structure, is economical and practical, and is easy to promote. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the application of this utility model in a center-driven single-tube sludge suction machine.

[0016] Figure 2 This is a schematic diagram of the structure of this utility model.

[0017] Figure 3 This is a side view of the assembly configuration of this utility model in a center-driven single-tube sludge suction machine. Detailed Implementation

[0018] The technical solution of this utility model will be further explained and described below with reference to specific embodiments and accompanying drawings.

[0019] like Figure 1 and 3As shown, a single-tube sludge suction machine skimming plate structure includes a cylindrical pool 1, an outlet weir 2, a truss 3, a skimming plate 4, a central column 5, and a drive unit 6. The central column 5 is located in the center of the cylindrical pool 1, the outlet weir 2 is arranged along the edge of the cylindrical pool 1, and the skimming plate 4 is arranged on the truss 3. Both the skimming plate 4 and the truss 3 are connected to the drive unit 6 so that they can rotate around the central column 5 under the drive of the drive unit 6.

[0020] like Figure 2 As shown, the skimming plate 4, from the central column 5 to the outlet weir 2, is provided with an arc segment 41, a straight line segment 42, and a scum hopper segment 3 in sequence. Let R be the distance from the outlet weir 2 to the center of the cylindrical pool 1. The radius of the arc segment 41 is 1 / 3R, and the arc angle is 90°. Using the direction of the truss 3 from the center to the edge of the cylindrical pool 1 as the baseline 30, the perpendicular line connecting the starting end of the arc segment 41 to the central axis of the cylindrical pool 1 forms a 154° angle with the baseline 30. The direction of the straight line segment 42 forms a 27° angle with the baseline 30. The direction of the scum hopper segment 3 forms an 8° angle with the baseline 30, and the direction of the straight line segment 42 forms a 161° angle with the direction of the scum hopper segment 3. A rubber plate 430 is provided at the free end of the scum hopper segment 3 to ensure close contact with the outlet weir 2 and prevent scum leakage.

[0021] The straight section 42 of the skimming plate 4 is provided with several horizontal support rods 420, and the truss 3 is provided with several vertical support rods 31 that are adapted to and connected to the several horizontal support rods 420.

[0022] Driven by the drive unit 6, the truss 3, several vertical support rods 31, the horizontal support rod 420 of the scum skimmer 4 and the scum skimmer 4 are driven to rotate around the central column 5 in sequence. Referring to the principle of water pump impeller, the running direction of the arc segment 41, the straight segment 42 and the scum discharge hopper segment 3 is at different angles to the water surface, so as to quickly send the scum on the surface of the liquid in the cylindrical pool 1 into the scum discharge hopper at the edge of the pool, and then into the effluent weir 2 located at the edge.

[0023] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model patent and the contents of the specification should still fall within the scope of the present utility model.

Claims

1. A skimming plate structure of a single-pipe suction dredger, comprising a cylindrical pool body, a water outlet weir, a truss, a skimming plate, a central column and a driving unit, the central column being arranged in the center of the cylindrical pool body, the water outlet weir being arranged along the edge of the cylindrical pool body, the skimming plate being arranged on the truss, and the skimming plate and the truss being connected with the driving unit to rotate around the central column under the driving of the driving unit. characterized in that The skimming plate is sequentially provided with a circular arc segment, a straight line segment and a residue discharge hopper segment from the central column to the water outlet weir, the distance from the water outlet weir to the center of the cylindrical pool body is R, the radius of the circular arc of the circular arc segment is 1 / 3R and the arc angle of the circular arc is 90°, the vertical line from the starting end of the circular arc segment to the central axis of the cylindrical pool body forms an angle of 154° with the reference line which is the direction from the center of the cylindrical pool body to the edge of the truss, the direction of the straight line segment forms an angle of 27° with the reference line, the direction of the residue discharge hopper segment forms an angle of 8° with the reference line, and the direction of the straight line segment forms an angle of 161° with the direction of the residue discharge hopper segment.

2. A skimming plate structure for a single tube suction dredger as claimed in claim 1, characterized in that: A plurality of horizontal support rods are arranged on the straight line segment of the skimming plate, and a plurality of vertical support rods are arranged on the truss and connected with the horizontal support rods.

3. A single tube suction dredger skimming plate structure as claimed in claim 1, characterized in that: An elastic member is arranged at the free end of the residue discharge hopper segment to tightly contact with the water outlet weir, so as to avoid the leakage of floating residue.

4. A skimming board structure for a single tube suction dredger as claimed in claim 3, characterised in that: The elastic member is a rubber plate.

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