Skimming device of sewage sedimentation tank

Abstract

The utility model discloses a sewage sedimentation tank skimming device which comprises a sewage sedimentation tank, a slag collecting hopper is fixedly connected to the inner wall of one side of the sewage sedimentation tank close to the water outlet end of the sewage sedimentation tank, the slag collecting hopper extends along the width direction of the sewage sedimentation tank, and a skimming plate capable of turning over up and down is rotatably mounted on the front side of the slag collecting hopper. And the skimming plate extends along the width direction of the sewage sedimentation tank, is turned upwards and is used for guiding the scum flowing onto the skimming plate along with the water flow into the scum collecting hopper. According to the automatic skimming device, automatic and regular skimming is realized, the working efficiency is obviously improved, and the working intensity of manual skimming is effectively reduced.

Description

Technical Field

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

[0002] In wastewater treatment, sedimentation tanks are structures that remove suspended solids from water using sedimentation. They are also water purification devices that utilize natural sedimentation or coagulation to remove suspended solids. During wastewater treatment, a large amount of sludge often floats on the surface of the sedimentation tank, forming scum. The accumulation of scum reduces the efficiency of the wastewater treatment system. Scum buildup on the surface hinders sludge settling and clarification, leading to deterioration of effluent quality. Furthermore, scum can affect the normal operation of the sedimentation tank, potentially causing equipment malfunctions and increased maintenance costs.

[0003] Therefore, it is necessary to remove scum regularly. Currently, the existing technology for removing scum involves a scraper mechanism that travels along the liquid surface of the sedimentation tank. As the scraper moves from the inlet to the outlet of the sedimentation tank, it pushes the scum to the outlet, where it is then manually removed using tools. Obviously, this method of removing scum is labor-intensive and inefficient. Utility Model Content

[0004] The purpose of this invention is to overcome the defects and shortcomings of the existing technology and provide a slag skimming device for sewage sedimentation tanks, so as to realize automatic and periodic slag skimming, improve work efficiency, and reduce the labor intensity of manual slag skimming.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A scum skimming device for a sewage sedimentation tank includes a sewage sedimentation tank, characterized in that: a scum collection hopper is fixedly connected to the inner wall of the sewage sedimentation tank near its outlet end, the scum collection hopper extends along the width direction of the sewage sedimentation tank, and a scum skimming plate that can be rotated up and down is rotatably installed on the front side of the scum collection hopper, the scum skimming plate extends along the width direction of the sewage sedimentation tank, and the scum skimming plate is rotated upward to guide the floating scum that flows onto it with the water flow into the scum collection hopper.

[0007] Furthermore, the upper end of the slag collection hopper is higher than the liquid level of the sewage sedimentation tank. The slag collection hopper includes two side panels, a rear side panel, and a slag guide plate that slopes downward from front to back. The upper edge of the slag guide plate is lower than the upper edge of the two side panels.

[0008] Furthermore, the bottom end of the rear side panel is provided with a slag discharge port, which penetrates the side wall of the corresponding sewage sedimentation tank and leads to an external scum collection tank.

[0009] Furthermore, the rear end of the skimming plate is rotatably mounted between the upper ends of the two side panels and is located above the slag guide plate.

[0010] Furthermore, a forward-extending crossbeam is fixedly connected to the inner wall of the sewage sedimentation tank above the slag collection hopper. An electric cylinder is rotatably installed at the front end of the crossbeam, and a connecting frame is rotatably connected to the front end of the telescopic rod of the electric cylinder. The lower end of the connecting frame is fixedly connected to the front end of the skimming plate.

[0011] Furthermore, the electric cylinder is electrically connected to a PLC for controlling the timing of its opening and closing.

[0012] Furthermore, the skimming plate is inclined downwards from back to front, with the front end of the skimming plate lower than the liquid level of the sewage sedimentation tank.

[0013] Furthermore, the front end of the skimming plate is provided with a slope that is lower at the front and higher at the back.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model sets up a scum collection hopper at the outlet of a sewage sedimentation tank, and rotatably installs a skimming plate that can be flipped up and down on the front side of the scum collection hopper. Utilizing the scraper mechanism commonly configured in existing sewage sedimentation tanks, the scraper mechanism pushes the scum onto the skimming plate along the liquid surface as it travels from the inlet to the outlet of the sewage sedimentation tank; or, by utilizing the water flow of the sewage sedimentation tank itself, the scum flows onto the skimming plate with the water flow. When the skimming plate flips upward, it can guide the scum into the scum collection hopper and discharge it, realizing automatic and periodic skimming, significantly improving work efficiency and effectively reducing the labor intensity of manual skimming.

[0016] 2. The slag collection hopper and skimming plate of this utility model extend along the width of the sewage sedimentation tank, which can effectively cover the width area of ​​the sewage sedimentation tank, thereby effectively collecting the scum in the sewage sedimentation tank. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a partial structural schematic diagram of the present invention. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] See Figure 1 , 2 A scum skimming device for a sewage sedimentation tank includes a sewage sedimentation tank 1. A scum collection hopper 2 is fixedly connected to the inner wall of the sewage sedimentation tank 1 near its outlet end. The scum collection hopper 2 extends along the width direction of the sewage sedimentation tank 1. A scum skimming plate 3 that can be flipped up and down is rotatably installed on the front side of the scum collection hopper 2. The scum skimming plate 3 extends along the width direction of the sewage sedimentation tank 1 and flips up to guide the floating scum that flows onto it with the water flow into the scum collection hopper 2.

[0021] In this invention, the upper end of the slag collection hopper 2 is higher than the liquid level of the sewage sedimentation tank 1, so as to prevent water in the sewage sedimentation tank 1 from overflowing into the slag collection hopper 2.

[0022] Specifically, the slag collection hopper 2 includes two side panels 21, a rear side panel 22, and a slag guide plate 23 that slopes downward from front to back. The upper edge of the slag guide plate 23 is lower than the upper edge of the two side panels 21, so as to leave space for the rotation and installation of the slag skimmer 3 and not to hinder the flipping of the slag skimmer 3.

[0023] In this utility model, the bottom end of the rear side panel 22 is provided with a slag discharge port 4, which penetrates the side wall of the corresponding sewage sedimentation tank 1 and leads to an external slag collection tank (not shown in the figure), so as to realize timely discharge of slag.

[0024] In this invention, the rear end of the skimming plate 3 is rotatably installed between the upper ends of the two side panels 21 and is located above the slag guide plate 23.

[0025] In addition, the rear end of the scum skimmer 3 extends a certain distance behind the upper edge of the scum guide plate 23. Therefore, after the scum skimmer 3 flips upward, a gap will not be formed between its rear end and the upper edge of the scum guide plate 23, which would cause the scum to leak out and then flow back to the sewage sedimentation tank 1.

[0026] In this utility model, a forward-extending crossbeam 5 is fixedly connected to the inner wall of the sewage sedimentation tank 1 above the slag collection hopper 2. An electric cylinder 6 is rotatably installed at the front end of the crossbeam 5. A connecting frame 7 is rotatably connected to the front end of the telescopic rod of the electric cylinder 6. The lower end of the connecting frame 7 is fixedly connected to the front end of the skimming plate 3.

[0027] Thus, by extending and retracting the electric cylinder 6, the skimming plate 3 is raised and lowered, thereby achieving the up-and-down flipping of the skimming plate 3.

[0028] In this invention, the electric cylinder 6 is electrically connected to a PLC (not shown in the figure), and the PLC controls the electric cylinder 6 to open and extend at regular intervals.

[0029] In this invention, the skimming plate 3 is inclined downwards from back to front, and the front end of the skimming plate 3 is lower than the liquid surface of the sewage sedimentation tank, which facilitates the scum to flow onto the skimming plate 3 with the water flow.

[0030] In this invention, the front end of the skimming plate 3 is provided with a slope 8 that is lower in the front and higher in the back, which further facilitates the scum to flow onto the skimming plate 3 with the water flow.

[0031] The present invention will be further described below with reference to the accompanying drawings:

[0032] In use, under the action of the water flow in the sewage sedimentation tank 1 (flowing from the inlet end to the outlet end of the sewage sedimentation tank 1), or under the pushing action of the scraper mechanism moving along the liquid surface from the inlet end to the outlet end of the sewage sedimentation tank 1 (i.e., along the length direction of the sewage sedimentation tank 1), the scum flows with the water flow onto the skimming plate 3.

[0033] Controlled by the PLC, the electric cylinder 6 opens and extends at set times.

[0034] When the telescopic rod of the electric cylinder 6 retracts, it drives the skimming plate 3 to rise, that is, to flip upward, guiding the scum on it into the scum collection hopper 2, and then discharging it into the external scum collection pool through the scum discharge port 4. This realizes automatic and periodic skimming, which significantly improves work efficiency and effectively reduces the workload of manual skimming.

[0035] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0036] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A skimming device for a sewage sedimentation tank, comprising a sewage sedimentation tank, characterized in that: The wastewater sedimentation tank has a slag collection hopper fixedly connected to the inner wall on one side near its outlet end. The slag collection hopper extends along the width of the wastewater sedimentation tank. A skimming plate that can be flipped up and down is rotatably installed on the front side of the slag collection hopper. The skimming plate extends along the width of the wastewater sedimentation tank and flips up to guide the floating slag that flows onto it with the water flow into the slag collection hopper.

2. A skimming device for a sewage sedimentation tank according to claim 1, characterized in that The upper end of the slag collection hopper is higher than the liquid level of the sewage sedimentation tank. The slag collection hopper includes two side panels, a rear side panel, and a slag guide plate that slopes downward from front to back. The upper edge of the slag guide plate is lower than the upper edge of the two side panels.

3. A skimming device for a sewage sedimentation tank according to claim 2, characterized in that The bottom end of the rear side panel is provided with a slag discharge port, which penetrates the side wall of the corresponding sewage sedimentation tank and leads to an external scum collection tank.

4. A skimming device for a sewage sedimentation tank according to claim 2, characterized in that The rear end of the skimming plate is rotatably mounted between the upper ends of the two side panels and is located above the slag guide plate.

5. A skimming device for a sewage sedimentation tank according to claim 1 or 4, characterized in that A forward-extending crossbeam is fixedly connected to the inner wall of the sewage sedimentation tank above the slag collection hopper. An electric cylinder is rotatably installed at the front end of the crossbeam. A connecting frame is rotatably connected to the front end of the telescopic rod of the electric cylinder. The lower end of the connecting frame is fixedly connected to the front end of the skimming plate.

6. A skimming device for a sewage sedimentation tank according to claim 5, characterized in that The electric cylinder is electrically connected to a PLC for controlling its timed opening and closing.

7. A skimming device for a sewage sedimentation tank according to claim 5, characterized in that The skimming plate is inclined downwards from back to front, with its front end lower than the liquid level in the wastewater sedimentation tank.

8. A skimming device for a sewage sedimentation tank according to claim 7, characterized in that The skimming plate has a sloping surface at the front end that is lower at the front and higher at the back.

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