A multi-stage filtering device with multi-layer screens for sewage treatment

Abstract

This utility model discloses a multi-stage filtration device with multiple screens for sewage treatment. It relates to the field of sewage treatment technology. The device includes a first tank and a second tank. The inner wall of the first tank is threadedly connected to the outer wall of the second tank, and a treatment device is slidably connected to the inner wall of the second tank. Through the coordinated arrangement of components, the first and second tanks are threadedly connected and fitted with flange interfaces, allowing for convenient assembly and disassembly and compatibility with existing sewage systems without the need for complex tools. The treatment device includes primary, intermediate, and fine filters, positioned by a snap-fit ​​circumferential array to achieve stepped filtration, reducing the burden on subsequent treatment processes. A push plate, limit rod, and compression spring work together to ensure the filters adhere to the screens, preventing short circuits in the sewage, and also assisting in the removal of impurities. The fully sliding adaptation structure reduces component wear, and individual filters can be replaced separately, saving on spare parts costs and maintenance time.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a multi-stage filtration device with multiple layers of screens for wastewater treatment. Background Technology

[0002] In the field of wastewater treatment, efficient and stable filtration devices have always been the focus of research and application. With increasingly stringent environmental standards, various types of wastewater need to undergo deep treatment before they can be discharged or reused, which poses a greater challenge to the performance of filtration devices.

[0003] Traditional multi-stage filtration devices often use fixed connections, making it difficult to accurately position the filters at each stage. Under long-term impact from sewage, misalignment can easily occur, causing sewage to short-circuit and flow away directly without filtration, severely affecting the filtration effect. Furthermore, when a filter is damaged or clogged, because it is closely connected to the overall structure of the device, the entire filtration assembly often needs to be disassembled and replaced, resulting in high spare parts costs and long maintenance time. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a multi-stage filtration device with multiple screens for wastewater treatment, which solves the problems of cumbersome disassembly and assembly and unstable filtration in traditional multi-stage wastewater treatment filtration devices.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage filtration device with multiple screens for wastewater treatment, comprising: a first tank and a second tank, wherein the inner wall of the first tank and the outer wall of the second tank are threadedly connected, and a treatment device is slidably connected to the inner wall of the second tank. The treatment device filters wastewater through multi-stage filtration. Flanges are fixedly connected to the input end of the first tank and the output end of the second tank. The treatment device includes a primary filter screen, a secondary filter screen at the bottom of the primary filter screen, and a fine filter screen at the bottom of the secondary filter screen. The inner walls of the primary filter screen, the secondary filter screen, and the fine filter screen are slidably connected by snap-fit ​​devices. The first tank and the second tank are fixed by threaded connection between their inner and outer walls. Compared with traditional welding or multi-bolt flange connections, the disassembly and assembly of the two tanks can be completed without the need for complex tools.

[0008] Preferably, the outer walls of the primary filter, intermediate filter, and fine filter are slidably connected to the inner wall of the second tank. The outer walls of the buckles are arranged in a circumferential array along the central axis of the primary filter, and the buckles are arranged in a circumferential array along the central axis of the filter. This ensures that each level of filter is accurately positioned and tightly fitted, avoiding short circuits in sewage caused by misalignment. When a filter is damaged or severely clogged and needs to be replaced, the corresponding filter can be removed directly through the sliding disassembly function of the buckles, without the need to replace the entire treatment device, thus reducing spare parts costs.

[0009] Preferably, a push plate is provided at the bottom end of the fine filter screen, and a limiting rod is fixedly connected to the bottom end of the push plate. The outer wall of the limiting rod is arranged in a circumferential array along the central axis of the push plate, and a limiting ring is slidably connected to the outer wall of the limiting rod. The compression spring applies an upward elastic pressure to each level of filter screen through the push plate. Combined with the downward limiting of the top pressure ring, it can ensure that each level of filter screen fits tightly, avoid the filter screen displacement and gap increase caused by water flow impact, and thus prevent unfiltered sewage from flowing through the gap.

[0010] Preferably, the outer wall of the push plate is slidably connected to the inner wall of the second tank, and the outer wall of the limiting ring is fixedly connected to the inner wall of the second tank.

[0011] Preferably, a compression spring is fixedly connected to the bottom end of the push plate, and a pressure ring is provided at the top end of the primary filter screen. The elastic pressing structure can adapt to the slight deformation of the filter screen during long-term use and extend the service life of the filter screen.

[0012] Preferably, the outer wall of the compression spring is arranged in a circumferential array along the central axis of the push plate, the outer wall of the pressure ring is fixedly connected to the inner wall of the first tank, and the outer wall of the pressure ring is slidably connected to the inner wall of the second tank.

[0013] Beneficial effects

[0014] This utility model provides a multi-stage filtration device with multiple screens for wastewater treatment. It has the following beneficial effects:

[0015] This utility model, through the coordinated design of its components, features a threaded connection between the first and second tanks, coupled with a flange interface, making assembly and disassembly convenient and compatible with existing sewage systems. No complex tools are required. The treatment device includes primary, secondary, and fine filters, which are positioned by a snap-fit ​​circumferential array to achieve stepped filtration, reducing the burden on subsequent treatment. The push plate, limit rod, and compression spring work together to ensure the filter fits tightly and prevents short circuits in the sewage through elastic pressure, while also assisting in the removal of impurities. The fully sliding adaptation structure reduces component wear, and each filter can be replaced individually, saving on spare parts costs and maintenance time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the processing device of this utility model;

[0019] Figure 4 This is a schematic diagram of the push plate of this utility model;

[0020] Figure 5 This utility model Figure 4 A magnified structural diagram of point A in the middle.

[0021] In the diagram: 1. First tank; 2. Second tank; 3. Processing device; 30. Primary filter screen; 31. Intermediate filter screen; 32. Fine filter screen; 33. Buckle; 34. Push plate; 35. Limiting rod; 36. Limiting ring; 37. Compression spring; 38. Pressure ring; 4. Flange. Detailed Implementation

[0022] 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.

[0023] Example

[0024] Please see Figure 1-5 This utility model provides a technical solution: a multi-stage filtration device with multiple screens for sewage treatment, comprising:

[0025] A first tank 1 and a second tank 2 are connected by threads to the inner wall of the first tank 1 and the outer wall of the second tank 2. A treatment device 3 is slidably connected to the inner wall of the second tank 2. The treatment device 3 filters the sewage through multi-stage filtration. A flange 4 is fixedly connected to the input end of the first tank 1 and the output end of the second tank 2. The inner wall of the first tank 1 and the outer wall of the second tank 2 are connected by threads. Assembly can be completed by rotation, ensuring that the internal treatment device 3 is in a closed filtration space. The flange 4 at the input end of the first tank 1 is connected to the sewage inlet pipe, and the flange 4 at the output end of the second tank 2 is connected to the subsequent treatment system. No custom adapters are required, enabling rapid installation.

[0026] The treatment device 3 includes a primary filter 30, a secondary filter 31 at the bottom of the primary filter 30, and a fine filter 32 at the bottom of the secondary filter 31. The inner walls of the primary filter 30, secondary filter 31, and fine filter 32 are slidably connected by clips 33. The outer walls of the primary filter 30, secondary filter 31, and fine filter 32 are slidably connected to the inner wall of the second tank 2. The outer walls of the clips 33 are arranged in a circumferential array along the central axis of the primary filter 30. Wastewater enters the device through the input end of the first tank 1, first contacting the pressure ring 38 at the top of the primary filter 30. Ring 38 is fixed to the inner wall of the first tank 1 and slides to fit the inner wall of the second tank 2, guiding the sewage to flow evenly to the primary filter screen 30, avoiding excessive local water flow impact. The sewage first flows through the primary filter screen 30, intercepting coarse impurities such as branches and large sand and gravel, preventing them from damaging the subsequent fine filter screen. After filtration, the sewage enters the intermediate filter screen 31, which further intercepts medium impurities such as small sand and gravel and hair, reducing the subsequent filtration load. Finally, the sewage passes through the fine filter screen 32, intercepting fine mud and colloidal particles, achieving coarse, medium and fine, and step-by-step purification, greatly reducing the turbidity of the sewage. Each filter screen is fixed by a buckle 33.

[0027] A push plate 34 is provided at the bottom end of the fine filter screen 32. A limit rod 35 is fixedly connected to the bottom end of the push plate 34, and the outer wall of the limit rod 35 is arranged in a circumferential array along the central axis of the push plate 34. A limit ring 36 is slidably connected to the outer wall of the limit rod 35. The outer wall of the push plate 34 is slidably connected to the inner wall of the second tank 2. The outer wall of the limit ring 36 is fixedly connected to the inner wall of the second tank 2. A compression spring 37 is fixedly connected to the bottom end of the push plate 34. A pressure ring 38 is provided at the top end of the primary filter screen 30. The outer wall of the compression spring 37 is arranged in a circumferential array along the central axis of the push plate 34. The outer wall of the pressure ring 38 is fixedly connected to the inner wall of the first tank 1. The outer wall of the pressure ring 38 is slidably connected to the inner wall of the second tank 2. During the filtration process, the outer wall of the push plate 34 and the second tank 2 are slidably connected. The inner wall of the tank 2 is slidably connected, with a fine filter screen 32 supported at its top. Compression springs 37 fixed at the bottom are arranged in a circumferential array along the central axis of the push plate 34. The push plate 34 is pushed upward by elastic force, and with the downward limit of the top pressure ring 38, uniform pressure is applied to the three-stage filter screen to ensure that the filter screen does not shift or have gaps under the impact of water flow. At the same time, the limiting rod 35 fixed at the bottom of the push plate 34 is arranged in a circumferential array along the central axis of the push plate 34 and is slidably connected to the limiting ring 36 fixed on the inner wall of the second tank 2, which limits the vertical movement range of the push plate 34 and avoids excessive pushing that may cause filter screen deformation or spring damage. When impurities accumulate on the surface of the filter screen and need to be cleaned, pushing the push plate 34 can drive the three-stage filter screen to move slightly up and down, causing the impurities to fall off. Cleaning can be completed with backwashing.

[0028] In use, the inner wall of the first tank 1 is threaded to the outer wall of the second tank 2, and can be assembled by rotating, ensuring that the internal processing device 3 is in a closed filtration space;

[0029] The first tank 1 has an input flange 4 that connects to the sewage inlet pipe, and the second tank 2 has an output flange 4 that connects to the subsequent treatment system. No custom adapters are needed, enabling rapid installation.

[0030] First, the sewage enters the device through the input end of the first tank 1 and comes into contact with the pressure ring 38 at the top of the primary filter screen 30. The pressure ring 38 is fixed to the inner wall of the first tank 1 and slides and adapts to the inner wall of the second tank 2, guiding the sewage to flow evenly to the primary filter screen 30 and avoiding excessive local water flow impact.

[0031] Wastewater first flows through the primary filter screen 30, which traps coarse impurities such as tree branches and large gravel to prevent them from damaging the subsequent fine filter screen. After filtration, the wastewater enters the intermediate filter screen 31, which further traps medium-sized impurities such as small particles of sand and gravel and hair, reducing the load on subsequent filtration. Finally, the wastewater passes through the fine filter screen 32, which traps fine silt and colloidal particles, achieving coarse, medium, and fine step-by-step purification, significantly reducing the turbidity of the wastewater. Each filter screen is fixed by a clip 33.

[0032] During the filtration process, the outer wall of the push plate 34 is slidably connected to the inner wall of the second tank 2. The top of the push plate 34 supports the fine filter screen 32, and the compression springs 37 fixed at the bottom are arranged in a circumferential array along the central axis of the push plate 34. The springs push the push plate 34 upward through elastic force. With the downward limit of the top pressure ring 38, uniform pressure is applied to the three-stage filter screen to ensure that the filter screen does not shift or have gaps under the impact of water flow. At the same time, the limiting rods 35 fixed at the bottom of the push plate 34 are arranged in a circumferential array along the central axis of the push plate 34 and are slidably connected to the limiting ring 36 fixed to the inner wall of the second tank 2. This limits the vertical movement range of the push plate 34 and avoids excessive pushing that could deform the filter screen or damage the springs. When impurities accumulate on the surface of the filter screen and need to be cleaned, pushing the push plate 34 can cause the three-stage filter screen to move slightly up and down, causing the impurities to fall off. Cleaning can be completed with backwashing.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A multi-stage filtration device with multiple screens for sewage treatment, comprising: The first tank (1) and the second tank (2) are characterized by: The inner wall of the first tank (1) is threadedly connected to the outer wall of the second tank (2), and the inner wall of the second tank (2) is slidably connected to a treatment device (3). The treatment device (3) filters the sewage through multi-stage filtration. The input end of the first tank (1) and the output end of the second tank (2) are fixedly connected to a flange (4). The processing device (3) includes a primary filter screen (30), a secondary filter screen (31) is provided at the bottom end of the primary filter screen (30), a fine filter screen (32) is provided at the bottom end of the secondary filter screen (31), and the inner walls of the primary filter screen (30), secondary filter screen (31) and fine filter screen (32) are slidably connected by buckles (33).

2. A multi-stage filtering device with multi-layer screen for sewage treatment according to claim 1, characterized in that: The outer walls of the primary filter (30), intermediate filter (31) and fine filter (32) are slidably connected to the inner wall of the second tank (2), and the outer walls of the buckles (33) are arranged in a circumferential array along the central axis of the primary filter (30).

3. A multi-stage filtering device with multi-layer screen for sewage treatment according to claim 1, characterized in that: The bottom end of the fine filter screen (32) is provided with a push plate (34), and the bottom end of the push plate (34) is fixedly connected to a limiting rod (35). The outer wall of the limiting rod (35) is arranged in a circular array along the central axis of the push plate (34), and the outer wall of the limiting rod (35) is slidably connected to a limiting ring (36).

4. A multi-stage filtering device with multi-layer screens for sewage treatment according to claim 3, characterized in that: The outer wall of the push plate (34) is slidably connected to the inner wall of the second tank (2), and the outer wall of the limiting ring (36) is fixedly connected to the inner wall of the second tank (2).

5. A multi-stage filtering device with multi-layer screen for sewage treatment according to claim 3, characterized in that: A compression spring (37) is fixedly connected to the bottom end of the push plate (34), and a pressure ring (38) is provided at the top end of the primary filter screen (30).

6. A multi-stage filtering device with multi-layer screens for sewage treatment according to claim 5, characterized in that: The outer wall of the compression spring (37) is arranged in a circular array along the central axis of the push plate (34). The outer wall of the pressure ring (38) is fixedly connected to the inner wall of the first tank (1). The outer wall of the pressure ring (38) is slidably connected to the inner wall of the second tank (2).

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