Septic tank sewage separation device
By designing a separating circular screen and stirring blades, the problem of incomplete solid-liquid separation in septic tanks is solved, improving the treatment efficiency and equipment reliability of septic tanks and extending their service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING XINLEI JIAYUAN ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
- Filing Date
- 2025-03-28
- Publication Date
- 2026-04-17
AI Technical Summary
Existing septic tank designs lack effective internal structures to promote solid-liquid separation, resulting in solid matter being suspended in the water, increasing treatment difficulty, and reducing the rate of biochemical reactions and septic tank efficiency.
The device employs a separation mesh and a rotating rod with stirring blades. The separation mesh prevents large particles from settling, while the stirring blades promote the decomposition of lumpy materials. At the same time, the sealing ring, gasket, and centering block enhance the sealing and stability of the device.
It effectively separates solids and liquids, reduces solid accumulation, extends the septic tank cleaning cycle, improves treatment efficiency, reduces the risk of blockage, lowers maintenance costs, and extends equipment life.
Smart Images

Figure CN224126686U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of septic tank waste separation technology, specifically relating to a septic tank waste separation device. Background Technology
[0002] A septic tank is a small, underground sewage treatment structure used for the preliminary treatment of domestic wastewater. It is mainly used in areas without access to municipal sewage networks or in detached residential areas. In a septic tank, wastewater undergoes natural sedimentation and anaerobic fermentation, breaking down solid pollutants into liquids and gases, thus achieving preliminary purification of the wastewater.
[0003] Existing septic tank designs often lack effective internal structures to promote solid-liquid separation, resulting in a large amount of incompletely decomposed solid matter suspended in the water. This increases the difficulty of subsequent treatment and affects the lifespan and efficiency of the septic tank. Furthermore, the lack of agitation devices slows down the biochemical reactions within the septic tank, reducing the effectiveness of wastewater treatment. Utility Model Content
[0004] The purpose of this invention is to provide a septic tank waste separation device, aiming to solve the problem that existing septic tank designs often lack effective internal structures to promote solid-liquid separation, resulting in a large amount of incompletely decomposed solid matter suspended in the water, increasing the difficulty of subsequent treatment and affecting the service life and efficiency of the septic tank. Furthermore, the lack of a stirring device leads to a slow biochemical reaction rate within the septic tank, reducing the effectiveness of wastewater treatment.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A septic tank waste separation device, comprising:
[0007] septic tank;
[0008] A gasket, which is fixedly connected to the upper end of the septic tank;
[0009] A separating circular mesh is located inside the opening of the septic tank;
[0010] Rotating rod, which is rotatably connected to the separating circular net;
[0011] A stirring blade, which is fixedly connected to the circumferential surface of the rotating rod;
[0012] A sewage pipe, which runs through the separation circular mesh.
[0013] As a preferred embodiment of this utility model, the upper end of the rotating rod is provided with a threaded hole, the upper end of the rotating rod is provided with a handle, and the lower end of the handle is fixedly connected with a bolt, the bolt being threaded into the threaded hole.
[0014] As a preferred embodiment of this utility model, a sealing ring is fixedly connected to the upper end of the separating circular mesh, and the sealing ring is sleeved on the circumferential surface of the rotating rod.
[0015] As a preferred embodiment of this utility model, a centering block is fixedly connected to the lower end of the septic tank.
[0016] In a preferred embodiment of this invention, the separating circular mesh is tightly fitted to the gasket.
[0017] As a preferred embodiment of this utility model, the bottom of the separating circular mesh has a hollow structure and is in contact with the bottom of the septic tank.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] 1. In this solution, firstly, by introducing a separating circular mesh and a rotating rod with stirring blades, this design effectively separates solid waste from liquid entering the septic tank. The separating circular mesh prevents larger solid waste particles from sinking to the bottom of the septic tank, while the stirring blades help break up larger lumps, promoting their initial decomposition, while ensuring that liquid can flow smoothly through the perforated structure to the bottom of the septic tank. This mechanism not only reduces the accumulation of solid waste in the septic tank and extends the septic tank cleaning cycle, but also improves waste treatment efficiency and reduces the risk of blockage.
[0020] 2. In this solution, the sealing rings, gaskets, and centering blocks included in the device enhance the overall system's sealing performance and stability. The sealing rings prevent contaminants from spilling out during rotor rotation, maintaining the device's cleanliness; the gaskets fit tightly against the separating mesh, strengthening the sealing effect at the upper port; and the centering block ensures the rotor remains centered during operation, preventing misalignment that could cause mechanical failure or wear. These design details work together to not only improve the equipment's operational reliability but also simplify maintenance procedures and reduce long-term operating costs. Attached Figure Description
[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0022] Figure 1 This is a perspective view of the present utility model;
[0023] Figure 2 This is an exploded view of the present invention;
[0024] Figure 3 This is a sectional perspective view of the present invention.
[0025] In the diagram: 1. Septic tank; 2. Separating mesh; 3. Handle; 4. Sewage pipe; 5. Bolt; 6. Rotating rod; 7. Threaded hole; 8. Sealing ring; 9. Centering block; 10. Agitator blade; 11. Gasket. Detailed Implementation
[0026] 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.
[0027] Example 1
[0028] Please see Figures 1-3 The present invention provides the following technical solution:
[0029] A septic tank waste separation device, comprising:
[0030] Septic tank 1;
[0031] Gasket 11 is fixedly connected to the upper end of septic tank 1;
[0032] Separating circular mesh 2 is located inside the opening of septic tank 1;
[0033] Rotating rod 6 is rotatably connected to the separating circular net 2;
[0034] Stirring blade 10 is fixedly connected to the circumferential surface of rotating rod 6;
[0035] Sewage pipe 4 runs through the separation circular mesh 2.
[0036] In a specific embodiment of this utility model, the septic tank 1 is used to collect and pre-treat domestic sewage. The top is slightly lower than the ground to connect to the drainage system of the household or building. The gasket 11 is used to seal the top opening of the septic tank 1 to prevent odors from escaping and external pollutants from entering, while ensuring the stability of the separating circular mesh 2 during installation. The separating circular mesh 2 is located inside the opening of the septic tank 1, intercepting larger solid particles, allowing liquid to flow through the mesh into the septic tank 1 below, while larger solid materials remain on the surface of the mesh for cleaning. When the rotating rod 6 rotates, it can drive the internal stirring blade 10 to rotate, which helps to agitate the sewage when the rotating rod 6 rotates, promotes solid-liquid separation, and helps to further decompose large materials into smaller particles for subsequent treatment. The sewage pipe 4 is a pipe extending from the inside of the septic tank 1 and passes through the inside of the separating circular mesh 2. Its main function is to discharge the pre-filtered sewage to subsequent treatment facilities or directly into the environment. The liquid filtration separation circle screen 2 is stored in the septic tank 1, and the residue is stored in the separation circle screen 2. This not only improves the working efficiency of the septic tank 1 and reduces the impact of large-volume solid waste on the volume of the septic tank 1, but also reduces the later maintenance cost and extends the service life of the septic tank 1.
[0037] Please refer to the details. Figures 1-3 The upper end of the rotating rod 6 is provided with a threaded hole 7, and the upper end of the rotating rod 6 is provided with a handle 3. The lower end of the handle 3 is fixedly connected with a bolt 5, and the bolt 5 is threadedly connected to the threaded hole 7.
[0038] In this embodiment: when the bolt 5 is screwed into the threaded hole 7, it is used to connect the handle 3 to the rotating rod 6. By operating the handle 3, the rotating rod 6 is driven to rotate, thereby causing the stirring blade 10 to rotate and stir the residues in the septic tank 1.
[0039] Please refer to the details. Figures 1-3 A sealing ring 8 is fixedly connected to the upper end of the separating circular mesh 2, and the sealing ring 8 is sleeved on the circumferential surface of the rotating rod 6.
[0040] In this embodiment, the design of the sealing ring 8 enhances the sealing between the separating circular mesh 2 and the rotating rod 6, prevents liquid leakage, improves separation efficiency, helps reduce friction between the rotating rod 6 and the separating circular mesh 2, and extends the service life of the equipment.
[0041] Please refer to the details. Figures 1-3 A centering block 9 is fixedly connected to the lower end of the septic tank 1.
[0042] In this embodiment: the centering block 9 facilitates the centering of sewage and makes it easy to extract.
[0043] Please refer to the details. Figures 1-3 The separating round mesh 2 and the gasket 11 are tightly fitted together.
[0044] In this embodiment, the tight fit between the separating circular mesh 2 and the gasket 11 improves the sealing performance, prevents liquid leakage, and ensures the stability of the internal environment of the septic tank 1. The tight fit design reduces the maintenance frequency because it reduces failures caused by poor sealing. The tight fit of the separating circular mesh 2 ensures the smooth progress of the separation process and improves the separation efficiency.
[0045] Please refer to the details. Figures 1-3 The bottom of the separating circular mesh 2 has a hollow structure and is in contact with the bottom of the septic tank 1.
[0046] In this embodiment, the hollow structure design at the bottom of the separating circular mesh 2 allows the liquid to smoothly enter the separating circular mesh 2, and the contact between the separating circular mesh 2 and the bottom of the septic tank 1 ensures the stability and efficiency of the separation process.
[0047] The working principle and usage process of this utility model are as follows: Install the septic tank 1 in place, ensuring that the gasket 11 is well sealed. Place the separating circular mesh 2 into the opening of the septic tank 1, so that the rotating rod 6 passes through the separating circular mesh 2. Start the rotating rod 6 to drive the stirring blade 10 to rotate, stirring the feces in the septic tank 1. During the stirring process, solids and liquids are separated through the separating circular mesh 2. Solids remain in the separating circular mesh 2, while liquids flow into the septic tank 1. Insert the suction pipe into the sewage pipe 4. When pumping, sewage enters the separating circular mesh 2. This not only improves the working efficiency of the septic tank 1 and reduces the impact of large-volume solid waste on the volume of the septic tank 1, but also reduces the later maintenance costs and extends the service life of the septic tank 1.
[0048] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A septic tank effluent separation device, characterised in that: include: Septic tank (1); Gasket (11), the gasket (11) is fixedly connected to the upper end of the septic tank (1); A separating circular mesh (2) is located inside the opening of the septic tank (1); Rotating rod (6), which is rotatably connected to the separating circular net (2); A stirring blade (10) is fixedly connected to the circumferential surface of a rotating rod (6); The sewage pipe (4) runs through the separation circle mesh (2).
2. A septic tank effluent separation device according to claim 1, characterised in that: The upper end of the rotating rod (6) is provided with a threaded hole (7), and the upper end of the rotating rod (6) is provided with a handle (3). The lower end of the handle (3) is fixedly connected with a bolt (5), and the bolt (5) is threadedly connected to the threaded hole (7).
3. A septic tank effluent separation device according to claim 2, wherein: A sealing ring (8) is fixedly connected to the upper end of the separating circular mesh (2), and the sealing ring (8) is sleeved on the circumferential surface of the rotating rod (6).
4. A septic tank effluent separation device according to claim 3, wherein: The lower end of the septic tank (1) is fixedly connected to a centering block (9).
5. A septic tank effluent separation device according to claim 4, wherein: The separating circular mesh (2) is tightly fitted with the gasket (11).
6. The septic tank waste separation device according to claim 5, characterized in that: The bottom of the separating circular mesh (2) is a hollow structure and is in contact with the bottom of the septic tank (1).