A multi-layer disc-type sediment well

Abstract

The utility model discloses a multilayer dish disc type mud well is used for rain sewage pipe network mud sand interception, including interception structure and the well body that is provided with the water inlet, water outlet, and the interception structure includes the hoisting shaft and interval installation dish disc on hoisting shaft, the top of hoisting shaft is provided with the hook, and the upper portion of hoisting shaft is connected with well body through the support rod, and the backflushing mouth corresponding with dish disc is set up on hoisting shaft interval, and hoisting shaft is connected with backflushing pipe. The utility model discloses a multilayer dish disc type mud well, through increasing water inlet pipe and backflushing pipe, utilize water inlet pipe to import high pressure water to backflushing pipe, through high pressure water to enter dish disc surface through every washing mouth, realize its rapid washing, avoid dish disc surface deposition mud sand and influence separation effect.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and more specifically, to a multi-layer disc-type sedimentation well. Background Technology

[0002] Sedimentation wells, as key functional components in stormwater and sewage pipe networks, are widely installed at pipe bends, slope changes, and pipe diameter connections. Their core function is to intercept solid sediments such as mud, sand, stones, and domestic waste carried in stormwater and sewage through the principle of gravity settling, so as to prevent pollutants from accumulating in the pipes and causing blockages, and to ensure smooth flow of water in the pipe network.

[0003] However, existing sedimentation wells still have significant technical defects in practical applications: First, most sedimentation wells are closed deep well structures (usually 3-5 meters deep), and after sediment accumulates, manual cleaning or mechanical suction is required, which restricts the working space, increases labor intensity, and poses safety hazards; Second, there is a lack of sediment inventory monitoring mechanisms, and the timing of cleaning is entirely based on experience, often resulting in sediment overflowing into pipelines due to untimely cleaning, causing pipeline blockage or even drainage problems; Third, the traditional sedimentation well has a simple settling chamber design, and sediment is prone to hardening at the bottom of the well, further increasing the difficulty of cleaning. At the same time, the cleaning process is prone to causing secondary pollution, which does not meet the industry requirements of green operation and maintenance.

[0004] Traditional sedimentation wells typically employ a single circular or rectangular cavity design without functional zoning. When rainwater and sewage enter the well, they flow in a turbulent state, with frequent mixing and disturbance of sediment and water flow, making it impossible to form a stable settling environment. Some fine silt fails to settle and is directly carried into the pipe network. Furthermore, the lack of a flow-guiding structure within the single cavity results in a short water residence time (typically less than 30 seconds), significantly reducing settling efficiency. Moreover, during cleaning, tools can easily cause secondary resuspension of already settled sediment.

[0005] The lack of guide plates or channels at the connection between the pipes and the well walls means that water flows directly into the bottom of the well after exiting the pipes, creating localized eddies that re-stir up the settled sediment. Furthermore, the pipe joints are mostly rigid connections with poor sealing performance, allowing sewage to easily leak into the surrounding soil and cause groundwater pollution. Additionally, some sedimentation wells have improperly designed inlet and outlet pipe elevations, creating a "reverse slope" that prevents water from draining properly, leading to prolonged immersion and further hardening of the sediment.

[0006] Traditional sedimentation well covers are fixed, one-piece structures that require complete disassembly for cleaning. Each cover weighs 20-50 kg, necessitating the operation of at least two people, resulting in low efficiency. Furthermore, the well openings are typically 60-80 cm in size, making them incompatible with commonly used cleaning equipment (such as suction hoses and grab buckets). This can cause equipment to scrape against the well walls during entry and exit. Additionally, the lack of protective barriers at the well openings allows debris or tools to easily fall into the well during cleaning, posing a safety hazard.

[0007] The aforementioned problems not only affect the long-term stable operation of stormwater and sewage pipe networks, but also significantly increase the operation and maintenance costs and management pressure of municipal pipe networks. Therefore, developing a sedimentation well structure that is easy to clean and has high settling efficiency has become an urgent technical need in the field of municipal environmental protection equipment. Utility Model Content

[0008] This invention provides a multi-layer disc-type sedimentation well to solve the problems of poor interception effect, easy caking, difficulty in cleaning, and easy secondary pollution of existing sedimentation wells.

[0009] According to one aspect of the present invention, a multi-layer disc-type sedimentation well is provided for sediment interception in rainwater and sewage pipe networks. It includes an interception structure and a well body with an inlet and an outlet. The interception structure includes a lifting shaft and discs spaced apart on the lifting shaft. A hook is provided at the top of the lifting shaft, and the upper part of the lifting shaft is connected to the well body via a support rod. Backwash ports corresponding to the discs are spaced apart on the lifting shaft. A backwash pipe is connected to the lifting shaft and is connected to an external pressurized water source.

[0010] Preferably, based on the above-mentioned design, the disc is herringbone shaped, and its surface is concave to form an arc-shaped structure. This structure effectively increases the adhesion area of ​​the precipitate and guides the precipitate to gather towards the center, preventing it from sliding to the edges.

[0011] Based on the above scheme, preferably, the disc includes a left lobe and a right lobe, and the angle between the left lobe and the right lobe is 30°~60°. This angle range can form a stable guiding surface while ensuring sufficient settling area.

[0012] Preferably, based on the above scheme, the surfaces of the left and right lobes are provided with grooves. These grooves further enhance surface roughness, providing more adhesion points for the sediment and improving the settling effect.

[0013] Based on the above scheme, the adjacent discs are connected by a fixing rod. The fixing rod design enhances the overall rigidity and stability of the entire interception structure and prevents the discs from shaking under the impact of water flow.

[0014] Based on the above scheme, a preferred embodiment is that the fixing rods consist of four sets, symmetrically arranged around the hoisting shaft. This symmetrical structure ensures uniform stress distribution and further enhances the stability of the structure.

[0015] Ideally, based on the above scheme, the inlet and outlet are located at the same height. This design helps to create a more stable water flow environment within the well body and reduces the turbulent impact on the interception structure.

[0016] This utility model discloses a multi-layer disc-type sedimentation well. By adding an inlet pipe and a backwash pipe, high-pressure water is introduced into the backwash pipe through the inlet pipe. The high-pressure water enters the disc surface through each flushing port, achieving rapid flushing and preventing the accumulation of mud and sand on the disc surface from affecting the separation effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the internal structure of the multi-layer disc-type sedimentation well of this utility model. Figure 2 This is a perspective view of the multi-layer disc sedimentation well of this utility model; Figure 3 For the present utility model Figure 1 FF cross-sectional view.

[0018] Explanation of icon numbers: 1. Well body; 11. Inlet; 12. Outlet; 2. Interception structure; 21. Lifting shaft; 211. Hook; 212. Backwash pipe; 213. Backwash port; 22. Disc; 221. Left flap; 222. Right flap; 223. Strip groove; 23. Support rod; 25. Fixing rod. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0020] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of a descriptive feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or sets.

[0021] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0022] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0023] In the embodiments shown in the accompanying drawings, directional indications (such as up, down, left, right, front, and back) are used to explain the structure and movement of the various components of this invention, and are not absolute but relative. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort. Example 1

[0026] Please see Figure 1 and combined Figure 2 , Figure 3 As shown, this utility model discloses a multi-layer disc-type sedimentation well, which is installed in the inspection well of the municipal stormwater and sewage pipe network to efficiently intercept solid sediments such as mud and sand in the water flow.

[0027] The sedimentation well of this utility model includes a well body 1 and a trapping structure 2 disposed inside the well body 1.

[0028] The well body 1 of this invention is a precast concrete cylindrical structure, with an inlet 11 and an outlet 12 located on the upper side wall. The inlet 11 and outlet 12 are at the same horizontal level for easy installation and are connected to external rainwater and sewage pipes respectively. This equal-flow inlet / outlet design helps to create a stable laminar flow within the well body 1, reducing the impact and disturbance of incoming water on sediment within the well.

[0029] The interception structure 2 of this utility model is suspended inside the well body 1 by its upper support structure, and is located below the inlet 11 and the outlet 12. Specifically, the interception structure 2 includes a lifting shaft 21, a disc 22, a support rod 23, and a backwash pipe 212.

[0030] like Figure 2As shown, the lifting shaft 21 of this utility model is a hollow seamless steel pipe. A hook 211 made of high-strength alloy steel is welded to the top of the lifting shaft 21 for lifting and installing the entire interception structure 2. The upper part of the lifting shaft 21 is connected to the inner wall of the well body 1 by three or four radially distributed support rods 23.

[0031] Specifically, one end of the support rod 23 of this utility model is welded to the hoisting shaft 21, and the other end is attached to the inner surface step edge of the well body 1, thereby ensuring that the interception structure 2 remains stable in the center of the well body 1 and will not sway due to the impact of water flow.

[0032] In this invention, multiple discs 22 are fixedly mounted on a lifting shaft 21 at intervals. In this embodiment, there are five discs 22, and the vertical distance between adjacent discs 22 is 300mm. Each disc 22 is herringbone-shaped, comprising a left lobe 221 and a right lobe 222. The left and right lobes 221 and 222 converge to form an inwardly concave curved surface, with an included angle α between the left and right lobes 221 and 222 of 30° to 60°. This concave curved surface effectively guides solid particles in the water flow to settle and aggregate towards the center of the disc 22. To further enhance the interception effect, radially distributed strip-shaped grooves 223 are stamped on the surfaces of both the left and right lobes 221 and 222. These grooves 223 increase surface roughness, providing attachment points for fine particles.

[0033] To enhance the rigidity of the entire interception structure 2, adjacent discs 22 are connected by four sets of fixing rods 25. The four sets of fixing rods 25 are symmetrically distributed around the lifting shaft 21, and the upper and lower ends of the fixing rods 25 are welded to the back (i.e., the convex surface) of two adjacent discs 22, respectively.

[0034] The internal cavity of the hoisting shaft 21 forms a backwashing channel. A backwashing port 213 is located on the hoisting shaft 21, directly opposite the center of each disc 22. The backwashing pipe 212 is made of high-pressure resistant PVC or PE pipe, with one end connected to a booster pump (not shown in the figure) outside the wellhead, and the other end connected to the top of the hoisting shaft 21, thereby guiding high-pressure water into the backwashing channel.

[0035] Rainwater and sewage flow into well 1 through inlet 11. Due to the obstruction of the interception structure 2 and the reduction of water flow velocity, solid particles begin to settle under the influence of gravity. The water flow bypasses the stacked discs 22, extending the flow path and increasing the hydraulic residence time, allowing more particles, especially fine particles, to come into contact with and be intercepted on the concave surface of the discs 22. The clarified water then flows out through outlet 12.

[0036] When cleaning is required, maintenance personnel first inject high-pressure water into the lifting shaft 21 through the backwash pipe 212. The high-pressure water is then sprayed upwards through the backwash ports 213 of each layer onto the recessed inner surface of each disc 2222, dispersing the attached sediment and suspending it in the water at the bottom of the well body 1. Subsequently, the entire interception structure 2 is lifted out of the well at a uniform speed and smoothly using the lifting equipment hooked onto the hook 211 at the top of the lifting shaft 21. At this time, the suspended sediment can be quickly sucked clean from the bottom of the well by the matching vacuum truck, and the lifted interception structure 2 can be further rinsed or inspected at a designated location. After cleaning, the cleaned interception structure 2 is lifted back into the well body 1 and secured, thus completing the entire maintenance process. Example 2

[0037] This embodiment has a basically the same structure as Embodiment 1, the main difference being the structure and fixing method of the disc 22.

[0038] In this embodiment, the disc 22 is molded from a non-metallic material (such as fiberglass or engineering plastic) to reduce the overall weight and facilitate hoisting. The included angle α between the left lobe 221 and the right lobe 222 is adjusted to 60° to adapt to working conditions where the sediment has high viscosity and poor flowability.

[0039] In addition, to accommodate deeper wells, the fixing rod 25 adopts a sleeve-type telescopic design, which allows the distance between the discs 22 to be adjusted according to the actual well depth, enhancing the versatility and adaptability of the design.

[0040] The beneficial effects of this utility model are as follows: Highly efficient settling and retention: The multi-layered disc design 22 significantly increases the effective settling area and alters the water flow path, extending the hydraulic residence time. The herringbone-shaped concave surface of the disc 22 effectively guides and captures solid particles, significantly improving the retention efficiency of sediment.

[0041] Easy to clean and eliminates safety hazards: The entire interception structure can be lifted out of the well by the hook at the top for cleaning, completely avoiding the safety risks brought about by manual well operation in the traditional way, making the cleaning operation safe and efficient.

[0042] Effectively prevents caking and secondary pollution: The integrated backwashing system can introduce high-pressure water through the backwashing pipe. The high-pressure water is sprayed onto the surface of each disc 22 through the backwashing port on the hoisting shaft, easily washing off the attached sediment and suspending it in the water. This makes it easy to discharge during the hoisting process or to be pumped away by the suction equipment, thereby effectively preventing mud and sand from caking and greatly reducing secondary pollution caused during cleaning.

[0043] Stable structure and low maintenance costs: Multiple fixation mechanisms, including support rods and fixing rods, ensure the stability of the interception structure within the wellbore. The modular hoisting design, combined with backflushing functionality, simplifies and expedites daily maintenance, significantly reducing long-term maintenance costs and management burden.

[0044] Finally, the method described in this application is merely a preferred embodiment and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multi-layer disc-type sedimentation well for intercepting sediment in stormwater and sewage pipe networks, characterized in that... The device includes a trapping structure and a well body with an inlet and an outlet. The trapping structure includes a lifting shaft and discs spaced apart on the lifting shaft. The top of the lifting shaft is provided with a hook, and the upper part of the lifting shaft is connected to the well body through a support rod. Backwash ports corresponding to the discs are spaced apart on the lifting shaft, and the lifting shaft is connected to a backwash pipe.

2. A multi-layer disc-type sedimentation well as described in claim 1, characterized in that, The disc is herringbone shaped, and its surface is concave downwards to form an arc-shaped structure.

3. A multi-layer disc-type sedimentation well as described in claim 2, characterized in that, The disc includes a left lobe and a right lobe, and the angle between the left lobe and the right lobe is 30° to 60°.

4. A multi-layer disc-type sedimentation well as described in claim 3, characterized in that, The surfaces of the left and right lobes are provided with grooves.

5. A multi-layer disc-type sedimentation well as described in claim 2, characterized in that, The adjacent discs are connected by a fixing rod.

6. A multi-layer disc-type sedimentation well as described in claim 5, characterized in that, The fixing rods are in four sets, symmetrically arranged with the hoisting shaft as the center.

7. A multi-layer disc-type sedimentation well as described in claim 1, characterized in that, The inlet and the outlet are at the same height.

Images