A sedimentation tank for domestic sewage treatment

Abstract

This utility model discloses a sedimentation tank for domestic sewage treatment, including a bottom plate and a tank body. A weighing plate is provided on the inner side of the bottom plate, and a top cover is provided on the top cover. A dosing assembly is provided on the top cover. The dosing assembly includes a storage tank and a dosing tank. An installation plate is provided on the top of the dosing tank, and a rectangular column is slidably arranged in front of the installation plate. A liquid level sensor is provided at the bottom of the rectangular column. In this utility model, the tank body is weighed by the weighing plate to obtain the weight of the sewage inside. A motor drives a gear to rotate, and through transmission, the rectangular column drives the liquid level sensor to rise and fall. The height of the liquid level sensor is the amount of chemical to be added. A liquid pump draws liquid from the storage tank and slowly transports it to the dosing tank. When the liquid level sensor detects the liquid level, the liquid pump stops running. After the addition is completed, the chemical is added into the tank by opening the dosing pipe.

Description

Technical Field

[0001] This utility model relates to the field of domestic sewage treatment technology, specifically a sedimentation tank for domestic sewage treatment. Background Technology

[0002] Domestic wastewater treatment is the process of treating wastewater generated in daily life through physical, chemical, and biological methods to remove pollutants and ensure that the treated water meets discharge standards or reuse requirements. Its core purpose is to reduce wastewater pollution, protect water resources and ecological balance, and also enable water resource recycling. It is a crucial link in safeguarding public health and the ecological environment.

[0003] The existing Chinese patent publication number CN217127110U, entitled "A Sludge Sedimentation Tank for Wastewater Treatment," explicitly states in its abstract that "This utility model discloses a sludge sedimentation tank for wastewater treatment, comprising a sedimentation tank body, a top cover fixedly installed on the top of the sedimentation tank body, a protective box fixedly installed at the top center of the top of the top cover, a feed inlet fixedly installed on one side of the top of the top cover, a placement structure movably installed on the outer surface of the sedimentation tank body, a filter screen movably installed in the inner cavity of the sedimentation tank body, and a water outlet pipe fixedly installed at the bottom center of the sedimentation tank body. This utility model, through its placement structure and feed pipe, allows for easy removal of deodorizing agents and other chemical agents from the placement rack when adding them to the sludge mixture inside the sedimentation tank body via a fixed pull block. The test tube design facilitates quantitative use, the placement rod design allows for the placement of a cloth to prevent spillage, and the feed pipe design ensures proper tilting of the test tubes, preventing easy reagent leakage."

[0004] However, while this technology allows for the addition of chemical reagents, the amount added cannot be controlled. Manual operation is required to control the volume of reagents taken from the test tubes, which is not only inefficient but also prone to errors. It's difficult to precisely adjust the reagent dosage based on the actual volume of wastewater. When the wastewater volume changes, the dosage cannot be adjusted automatically and in real time, potentially leading to over-addition of reagents, causing waste and secondary pollution, or under-addition, resulting in substandard wastewater treatment and affecting sedimentation efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a sedimentation tank for domestic sewage treatment to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A sedimentation tank for treating domestic sewage includes a bottom plate and a tank body. A weighing plate is provided on the inner side of the bottom plate, and a top cover is provided on the top cover. A dosing assembly is provided on the top cover. The dosing assembly includes a storage tank and a dosing tank. A mounting plate is provided on the top of the dosing tank, and a rectangular column is slidably arranged in front of the mounting plate. A liquid level sensor is provided at the bottom of the rectangular column.

[0007] In a preferred embodiment of this utility model, a protrusion is provided on the weighing surface of the weighing plate, and the top of the protrusion is connected to the bottom of the tank.

[0008] In a preferred embodiment of this utility model, limiting arc plates are provided on both sides above the bottom plate, and the tank body is slidably installed inside the two limiting arc plates.

[0009] In a preferred embodiment of this utility model, a drain port is provided at the bottom of the front and rear sides of the tank, and a water inlet is provided at the rear of the top of the top cover. The drain port is switched by a solenoid valve, and a filter frame is provided inside the drain port at the rear.

[0010] In a preferred embodiment of this utility model, a liquid pump is provided at the front of the top of the medicine storage tank. The liquid pump's pumping end is connected to and communicates with the inside of the medicine storage tank, and the liquid pump's outlet end is connected to and communicates with the rear of the inside of the medicine dosing tank. A partition is provided at the middle position of the front and rear sides of the bottom of the mounting plate.

[0011] In a preferred embodiment of this utility model, a dosing pipe is provided at the bottom of the dosing tank, the dosing pipe passes through the top cover, and the dosing pipe is switched by a solenoid valve.

[0012] In a preferred embodiment of this utility model, a motor is provided on one side of the top of the mounting plate, a gear is provided on the output end of the motor, and a rack is provided behind the rectangular column, with the gear meshing with the rack.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0014] Beneficial effects: The tank is weighed using a weighing plate. When adding wastewater, the weight of the entire structure above the tank is subtracted to obtain the weight of the wastewater inside. This means that before each addition of wastewater, the weight of the upper structure is measured, allowing for the determination of the required amount of chemical agent. Once the weighing plate obtains the weight of the wastewater, a computer calculates the required amount of agent and sends a signal to a motor. The motor drives a gear to rotate, which in turn moves a rectangular column to raise or lower a liquid level sensor. The height of the liquid level sensor indicates the amount of agent to be added. A pump draws liquid from the storage tank and slowly delivers it to the dosing tank. When the liquid level sensor detects the liquid level, the pump stops. After addition, the chemical agent is added into the tank by opening the dosing pipe. This method automates and precisely adds the agent without manual intervention, greatly improving operational efficiency. It also avoids errors caused by manual metering, allowing for real-time adjustment of the dosage based on changes in wastewater volume, ensuring effective wastewater treatment while reducing agent waste and lowering wastewater treatment costs.

[0015] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A schematic diagram of the main structure of a sedimentation tank for domestic sewage treatment; Figure 2 A schematic diagram of the connection structure between the bottom plate and the tank body in a sedimentation tank for domestic sewage treatment; Figure 3 A schematic diagram of the cross-sectional structure of the top cover of a sedimentation tank for domestic sewage treatment; Figure 4 This is a schematic diagram of the internal structure of the dosing tank in a sedimentation tank for domestic sewage treatment.

[0017] In the diagram: 1. Base plate; 11. Tank body; 12. Limiting arc plate; 13. Weighing plate; 14. Protrusion; 2. Drain outlet; 21. Filter frame; 22. Top cover; 23. Water inlet; 24. Medicine storage tank; 3. Liquid pump; 31. Dosing tank; 32. Mounting plate; 33. Dosing pipe; 34. Baffle; 4. Rectangular column; 41. Liquid level sensor; 42. Rack; 43. Motor; 44. Gear. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] Please refer to Figures 1-4 This utility model discloses a sedimentation tank for domestic sewage treatment, comprising a base plate 1 and a tank body 11. The base plate 1 serves as a supporting structure for supporting the overall structure. The tank body 11 is the main body of the sedimentation tank. A top cover 22 is provided on the top of the tank body 11, which controls the opening and closing of the tank body 11. Sewage outlets 2 are provided on the bottom of the front and rear sides of the tank body 11. A water inlet 23 is provided at the rear of the top of the top cover 22. The sewage outlets 2 are opened and closed by a solenoid valve. A filter frame 21 is provided inside the rear sewage outlet 2. Sewage is added to the tank body 11 through the water inlet 23. After the sewage has settled, the sewage is discharged by opening the rear sewage outlet 2 and blocking sludge and other impurities through the filter frame 21. After the sewage is discharged, the sludge inside is discharged by closing the rear sewage outlet 2 and opening the front sewage outlet 2. If it cannot be discharged directly, a sludge pump or other tools can be used, or the top cover 22 can be opened to discharge it.

[0020] A weighing plate 13 is provided on the inner side of the base plate 1. A protrusion 14 is provided on the weighing surface of the weighing plate 13. The top of the protrusion 14 is connected to the bottom of the tank body 11. Limiting arc plates 12 are provided on both sides above the base plate 1. The tank body 11 is slidably installed on the inner side of the two limiting arc plates 12. The limiting arc plates 12 on both sides limit the tank body 11, thereby preventing the tank body 11 from tilting. The weighing plate 13 weighs the tank body 11. When sewage is added into the tank body 11, the weight of the sewage inside is obtained by subtracting the weight of all structures above the tank body 11. That is, the weight above is weighed before each sewage is added, so the amount of chemical agent to be added can be determined. All of these are controlled and calculated by an external computer PLC intelligent controller.

[0021] A dosing assembly is provided on the top cover 22. The dosing assembly includes a storage tank 24 and a dosing tank 31. The storage tank 24 is used to store chemical agents for treating sewage. The top of the dosing tank 31 is provided with a mounting plate 32. A liquid pump 3 is provided at the front of the top of the storage tank 24. The liquid pump 3 is a variable speed electric liquid pump that can precisely control the liquid flow rate. The liquid pump 3's pumping end is connected to and communicates with the inside of the storage tank 24. The liquid pump 3's outlet is connected to and communicates with the rear of the dosing tank 31. A dosing pipe 33 is provided at the bottom of the dosing tank 31. The dosing pipe 33 passes through the top cover 22. The dosing pipe 33 is switched by a solenoid valve, that is, the liquid pump 3 draws liquid from the storage tank 24 and slowly delivers it to the dosing tank 31. After the addition is completed, the chemical agent is added into the tank 11 by opening the dosing pipe 33. A rectangular column 4 is slidably mounted on the front of the mounting plate 32. A liquid level sensor 41 is mounted at the bottom of the rectangular column 4 and is electrically connected to the pump 3. A wiring port can be provided inside the rectangular column 4 for easy wiring of the liquid level sensor 41, or a wireless liquid level sensor can be used directly. A partition 34 is located at the middle of the front and rear sides of the bottom of the mounting plate 32 to block liquid and prevent it from splashing onto the liquid level sensor 41. A motor 43, a servo motor, is mounted on one side of the top of the mounting plate 32 and is electrically connected to the weighing plate 13. A gear 44 is mounted on the output end of the motor 43. A rack 42 is installed behind the column 4, and a gear 44 meshes with the rack 42. When the weighing plate 13 obtains the weight of the internal sewage, the computer calculates the amount of medicine needed and sends the signal to the motor 43. The motor 43 drives the gear 44 to rotate, and through transmission, the rectangular column 4 drives the liquid level sensor 41 to rise and fall. The height of the liquid level sensor 41 is the amount of medicine to be added. All of these are calculated and controlled in advance by the computer and controller, thereby adjusting the height of the liquid level sensor 41. When the pump 3 delivers the medicine to the dosing tank 31, the liquid level sensor 41 detects the liquid level and the pump 3 stops running.

[0022] All electrical equipment in the device is controlled by an external PLC intelligent controller. Equipment requiring pre-commissioning is pre-commissioned, and equipment requiring external power is powered by an external power source, which is a standard technique for those skilled in the art. The weighing plate 13 is connected to the PLC intelligent controller via a data transmission line, with a cable tray installed in a suitable location on the structure to transmit weighing data to the controller in real time. The motor 43, the liquid pump 3, the liquid level sensor 41, and each solenoid valve are all connected to the PLC intelligent controller via control lines. The controller sends lifting control signals to the motor 43 and start / stop and speed control signals to the liquid pump 3 according to the preset program and the data transmitted by the weighing plate 13. It receives the detection signal from the liquid level sensor 41 and controls the liquid pump 3 to stop accordingly. At the same time, it controls the on / off state of each solenoid valve. All power supply lines for electrical equipment are equipped with overload protection devices to prevent damage to the equipment due to excessive current and ensure the safe and stable operation of the power system.

[0023] The working principle of this utility model is as follows: Sewage is added to the tank 11 through the water inlet 23. The tank 11 is weighed by the weighing plate 13. When sewage is added to the tank 11, the weight of the internal sewage is obtained by subtracting the weight of all structures above the tank 11. That is, the weight above is weighed before each sewage addition, so the amount of chemical agent to be added can be determined. When the weighing plate 13 obtains the weight of the internal sewage, the computer calculates how much agent is needed and sends the signal to the motor 43. The motor 43 drives the gear 44 to rotate, and the transmission causes the rectangular column 4 to move the liquid level sensor 41 up and down. The height of the liquid level sensor 41 is the amount of agent to be added. The liquid pump 3 draws liquid from the storage tank 24 and slowly transports it to the dosing tank 31. When the liquid level sensor 41 detects the liquid level, the liquid pump 3 stops running. After the addition is completed, the chemical agent is added to the tank 11 by opening the dosing pipe 33.

[0024] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A sedimentation tank for treating domestic sewage, characterized in that: It includes a base plate (1) and a tank body (11). A weighing plate (13) is provided on the inner side of the base plate (1). A top cover (22) is provided on the top of the tank body (11). A dosing assembly is provided on the top cover (22). The dosing assembly includes a storage tank (24) and a dosing tank (31). The top of the dosing tank (31) is provided with a mounting plate (32), and a rectangular column (4) is slidably provided in front of the mounting plate (32). A liquid level sensor (41) is provided at the bottom of the rectangular column (4).

2. A sedimentation tank for domestic sewage treatment according to claim 1, characterized in that, The weighing plate (13) has a protrusion (14) on its weighing surface, and the top of the protrusion (14) is connected to the bottom of the tank (11).

3. A sedimentation tank for domestic sewage treatment according to claim 1, characterized in that, Limiting arc plates (12) are provided on both sides above the bottom plate (1), and the tank body (11) is slidably installed inside the two limiting arc plates (12).

4. A sedimentation tank for domestic sewage treatment according to claim 1, characterized in that, The tank (11) has a drain port (2) at the bottom of the front and rear sides, and a water inlet (23) is provided at the rear of the top cover (22). The drain port (2) is switched by a solenoid valve, and a filter frame (21) is provided inside the drain port (2) at the rear.

5. A sedimentation tank for domestic sewage treatment according to claim 1, characterized in that, A liquid pump (3) is provided at the front of the top of the medicine storage tank (24). The liquid pump (3) is connected to and communicates with the inside of the medicine storage tank (24) at the liquid pumping point. The liquid pump (3) is connected to and communicates with the rear of the inside of the dosing tank (31) at the liquid outlet point. A partition (34) is provided at the middle position of the front and rear sides of the bottom of the mounting plate (32).

6. A sedimentation tank for domestic sewage treatment according to claim 1, characterized in that, The bottom of the dosing tank (31) is provided with a dosing pipe (33), which passes through the top cover (22) and is switched by a solenoid valve.

7. A sedimentation tank for domestic sewage treatment according to claim 1, characterized in that, A motor (43) is provided on one side of the top of the mounting plate (32), a gear (44) is provided on the output end of the motor (43), and a rack (42) is provided behind the rectangular column (4), and the gear (44) meshes with the rack (42).

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