Rain inlet overflow type solid-liquid separation device

Abstract

The invention discloses an overflow type solid-liquid separation device for a gutter inlet, and belongs to the technical field of municipal drainage. The device comprises an intercepting frame, an overflow device, lifting adjusting feet and a rainwater grate. Hollowed-out meshes are formed in the periphery and the bottom of the intercepting frame and used for intercepting solid garbage and draining water; at least one overflow device is arranged in the intercepting frame, and a bottom through hole of the overflow device is communicated with the bottom overflow hole of the intercepting frame. Reinforcing ribs are arranged on the outer wall of the intercepting frame to enhance structural strength, handle holes are formed in the top to facilitate maintenance, and the bottom adapts to different gutter inlet depths through lifting adjusting feet. The top of the overflow device is provided with an openable cover plate with a drain hole, and the height of the overflow device can be adjusted to adapt to different water depths. The device is made of environment-friendly resin materials, and the top of the device is provided with a PC retractable plate sealing edge to enhance the sealing performance. Balance of efficient interception and blockage prevention is achieved, the device has the advantages of being high in adaptability, stable in structure, convenient and fast to maintain and the like, the drainage reliability of the gutter inlet is effectively improved, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of municipal drainage systems and rainwater treatment equipment, specifically relating to a solid-liquid separation device for rainwater inlets. It is particularly suitable for rainwater collection and discharge systems in municipal roads, residential areas, urban parks, industrial parks, and other scenarios that require both garbage interception and anti-clogging functions. It is especially aimed at improving the drainage efficiency of rainwater inlets and protecting pipelines in rainy areas or environments with frequent rainstorms. Background Technology

[0002] In municipal drainage systems, storm drains are crucial nodes for rainwater collection, and their function directly impacts drainage efficiency and pipeline operation and maintenance costs. However, existing storm drains and their associated interception devices generally suffer from the following technical shortcomings, making it difficult to meet practical application needs: Blockages leading to drainage failures are a common problem. Traditional storm drains rely solely on simple filtration through storm grates, lacking dedicated solid-liquid separation structures. Debris such as fallen leaves, plastic bags, and silt easily enters downstream storm drains with rainwater, accumulating over time and causing blockages. This necessitates frequent dredging, resulting in high maintenance costs (statistics show that 30%-40% of municipal pipe blockages are caused by debris entering storm drains). While some existing interception devices (such as fixed grid frames) can intercept debris, they lack overflow channels. When the grids are clogged with debris, rainwater cannot drain in a timely manner, especially during heavy rain, easily causing road flooding. In severe cases, this can affect traffic safety and even lead to urban flooding.

[0003] Poor adaptability and low versatility: The size (e.g., length 300-1000mm, width 300-800mm) and depth (300-800mm) of rainwater inlets vary greatly in different scenarios. Existing interception devices are mostly customized integrated structures, which cannot flexibly adapt to rainwater inlets of different specifications. Different sizes of products need to be produced for different projects, resulting in increased production costs and inventory pressure. Although some devices can adjust the height, the adjustment range is narrow (usually only 20-50mm), and the adjustment structure is unstable and easily shifts under the impact of water flow.

[0004] Insufficient structural strength and short lifespan: Existing interception devices mostly use ordinary plastics (such as polyethylene) or thin steel plates. Ordinary plastics have poor weather resistance and are prone to aging and cracking when exposed to ultraviolet rays, rain, and acid and alkali environments for a long time (lifespan of only 2-3 years). Thin steel plates are prone to rust, especially in highly corrosive environments such as coastal areas or industrial areas, where rust and perforation can occur within six months. At the same time, the devices lack reinforced structures and are prone to deformation under the pressure of garbage accumulation or external forces (such as vehicle crushing or collisions during manual cleaning), leading to functional failure.

[0005] The existing interception devices are mostly fixed installations, requiring the removal of the rain grate and tools to take out the entire device when cleaning up the garbage. This operation is cumbersome (it takes 15-20 minutes per person to clean each device). In addition, the devices do not have dedicated handles or positioning structures, which can easily cause garbage to fall into the rainwater inlet during the removal process, causing secondary pollution to the pipes. In some devices, the overflow component is integrally formed with the interception frame. If the overflow channel is blocked, the entire device needs to be disassembled for repair, resulting in low maintenance efficiency.

[0006] To address the aforementioned issues, there is an urgent need for a rainwater inlet solid-liquid separation device that combines efficient interception, anti-clogging, high adaptability, long lifespan, and convenient maintenance, in order to improve the stability and economy of municipal drainage systems. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an overflow-type solid-liquid separation device for rainwater inlets, so as to solve the problems of easy clogging of existing rainwater inlets, low drainage efficiency, poor adaptability, insufficient structural strength and inconvenient maintenance.

[0008] To achieve the above objectives, the present invention provides an overflow-type solid-liquid separation device for rainwater inlets, comprising components such as an interception frame, an overflow device, a lifting and adjusting foot, and a rainwater grate. The interception frame is installed inside a concrete rainwater inlet, and its shape matches the rainwater inlet; it can be cubic or cylindrical. The interception frame has perforated mesh around its perimeter and bottom for drainage and interception of solid waste.

[0009] Furthermore, the interception frame is provided with at least one overflow device, which protrudes from the inside of the interception frame and has a through hole at its bottom that communicates with the overflow hole at the bottom of the interception frame; the side wall of the overflow device is provided with multiple holes for continuing to drain water when the interception frame is blocked by garbage, forming a reliable overflow channel to ensure smooth drainage.

[0010] Furthermore, the outer wall of the interception frame is provided with reinforcing ribs to enhance the overall structural strength and prevent deformation under garbage accumulation or external force.

[0011] Furthermore, the interceptor frame is provided with a handle hole, which facilitates installation, removal and maintenance, and improves operating efficiency.

[0012] Furthermore, the overflow device is provided with an openable cover plate on top, and the cover plate is provided with a drain hole, which can adjust the drainage flow rate as needed or facilitate the cleaning of internal debris.

[0013] Furthermore, the overflow device has a cylindrical structure with an adjustable height to adapt to different water depths, thus enhancing the device's adaptability.

[0014] Furthermore, the bottom of the interceptor frame is equipped with a height adjustment foot, which can be adjusted by a pin or threaded structure to accommodate rainwater inlets of different depths and enhance versatility.

[0015] Furthermore, the interception frame and overflow device are made of environmentally friendly resin or translational resin, which have good corrosion resistance, impact resistance and weather resistance, and extend service life.

[0016] Furthermore, the top of the device is sealed with a PC roll-up plate around its perimeter to enhance sealing and structural stability, preventing water from overflowing or impurities from entering.

[0017] Furthermore, a detachable connection structure is provided between the through hole of the overflow device and the overflow hole of the interceptor frame, facilitating maintenance and replacement and reducing operation and maintenance costs. The device as a whole adopts a modular design, and multiple interceptor frames and overflow devices can be combined and installed according to the size of the rainwater inlet, realizing flexible configuration and expansion.

[0018] Furthermore, an adjustment section is provided at one end of the interception frame to adjust the length or width of the interception frame to adapt to different rainwater inlet sizes, effectively improving compatibility.

[0019] Compared with the prior art, the present invention has the following beneficial effects: Efficient interception and anti-clogging: Through the dual structure of interception frame and overflow device, it can effectively intercept solid waste, and ensure smooth drainage through overflow channel when blockage occurs, significantly improving the reliability of drainage system; Height adaptability and flexible adjustment: With adjustable feet and modular design, it can adapt to rainwater inlets of different sizes and depths, reducing customization costs and inventory pressure; Sturdy structure and long service life: The use of reinforcing ribs and high-performance materials enhances the overall strength and durability of the device, making it suitable for various harsh environments; Easy maintenance and efficient operation: The design features a handle hole, a detachable structure, and an openable cover, simplifying cleaning and maintenance processes and improving operational efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an overall schematic diagram provided for an embodiment of the present invention; Figure 2 , 3 An exploded view diagram provided for an embodiment of the present invention; Figure 4 A cross-sectional view provided for an embodiment of the present invention; Figure 5This is another overall schematic diagram provided for an embodiment of the present invention.

[0022] The following are the labeling elements in the figure: 1. Interception frame; 11. Hollow mesh; 12. Handle hole; 13. Reinforcing rib; 14. Overflow hole; 2. Overflow device; 21. Cover plate; 22. Hole; 23. Through hole; 3. Lifting adjustment foot; 31. Pin; 4. Rainwater pipe; 5. Concrete rainwater inlet; 6. Rainwater grate; 7. Adjustment part; 71. Adjustment bolt.

[0023] The accompanying drawings have illustrated specific embodiments of the invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0026] Please see Figures 1 to 4 As shown, this embodiment of the invention provides an overflow-type solid-liquid separation device for rainwater inlets. This device is mainly installed inside concrete rainwater inlets 5 in places such as municipal roads, residential areas, urban parks or industrial parks. It is used to achieve solid-liquid separation during rainwater collection, which can effectively intercept solid waste and prevent drainage problems caused by waste blockage.

[0027] In a typical implementation, the solid-liquid separation device mainly consists of an interception frame 1, an overflow device 2, lifting and adjusting feet 3, and a rain grate 6. The interception frame 1, as the main structure of the device, is designed in a cubic or cylindrical shape to match common rainwater inlets. A cubic structure is more suitable for standard rectangular rainwater inlets, fully utilizing the internal space and increasing waste interception capacity; a cylindrical structure is more suitable for circular rainwater inlets or for applications requiring reduced structural stress concentration. The interception frame 1 has numerous perforated mesh openings 11 distributed along its four side walls and bottom, effectively intercepting common solid waste such as leaves, plastic bags, and paper scraps while ensuring smooth rainwater flow, avoiding excessive resistance to normal drainage. The mesh openings are arranged in a staggered pattern, which not only improves the overall structural strength but also increases the filtration area and reduces the probability of individual mesh openings becoming clogged.

[0028] The interception frame 1 is equipped with one or more overflow devices 2. The main body of the overflow device 2 is typically designed as a cylindrical structure, vertically installed inside the interception frame 1, and has a through hole 23 at its bottom. This through hole 23 is precisely aligned and connected with an overflow hole 14 pre-drilled at the bottom of the interception frame 1, forming an independent drainage channel. Multiple holes 22 are evenly distributed circumferentially on the sidewalls of the overflow device 2 to ensure that even when the mesh of the interception frame 1 is clogged with small debris, water can still flow into the overflow device 2 through these sidewall holes 22, and then drain into the downstream rainwater pipe 4 through the through hole 23 and the overflow hole 14 at the bottom. The height of the overflow device 2 is designed so that its top is higher than the conventional debris accumulation height of the interception frame 1, so that even if a certain amount of debris has accumulated inside the interception frame 1, the inlet of the overflow device 2 can remain unobstructed. In some embodiments, to adapt to the rainfall characteristics and debris load of different regions, the height of the overflow device 2 can be adjustable, and different heights can be fixed by threaded connection or pin positioning.

[0029] The overflow device 2 has an openable cover 21 on its top. The cover 21 is connected to the main body of the device by hinges or snaps, making it easy to open for internal cleaning and maintenance. The cover 21 itself also has several drainage holes. These drainage holes can assist in drainage when not blocked, and can also serve as observation holes, allowing maintenance personnel to directly observe the internal condition of the device. In the event of heavy rain, when the water level rises rapidly, the drainage holes on the cover 21 can accelerate the drainage speed above the water surface, further improving emergency drainage capacity.

[0030] Multiple reinforcing ribs 13 are provided on the outer wall of the interception frame 1. These reinforcing ribs 13 are usually distributed in a grid pattern or longitudinal rib pattern, which not only improves the overall rigidity of the interception frame 1, but also prevents deformation under the pressure of garbage accumulation or external impact.

[0031] To facilitate installation and maintenance, the interception frame 1 is specially equipped with handle holes 12. These handle holes 12 are usually located on the top edge of the interception frame 1, symmetrically distributed, making it easy to move the device directly using special tools or manually. During maintenance, maintenance personnel only need to open the rain grate 6 and remove the entire device from the rainwater inlet through the handle holes 12, clean off any debris, and then put it back in its original position. The entire process requires no special tools and can be completed by a single person in a few minutes, greatly improving maintenance efficiency.

[0032] Considering the differences in the depth of rainwater inlets of different regions and specifications, this invention incorporates adjustable feet 3 at the bottom of the interception frame 1. These adjustable feet, typically two or four in number, are distributed at the bottom of the interception frame 1 and are height-adjusted via pins 31 or a threaded structure. For example, when using pins 31 for adjustment, the adjustable feet have a series of equally spaced pin holes; the height is fixed by inserting pins 31 at different positions. When using threads for adjustment, the support height is changed by rotating the threaded rod on the adjustable feet. This height adjustment mechanism allows the invention to adapt to various rainwater inlets with depths ranging from 300mm to 800mm, greatly improving the product's versatility and applicability. The bottom of the adjustable feet is typically designed with anti-slip textures or an enlarged bearing area to enhance stability at the bottom of the rainwater inlet and prevent displacement under water flow impact.

[0033] In terms of material selection, the interception frame 1 and the overflow device 2 are preferably made of high-performance engineering plastics such as environmentally friendly resins or translational resins. These materials have excellent corrosion resistance, resisting the erosion of acidic or alkaline substances commonly found in rainwater; they also have high impact strength and weather resistance, maintaining stable performance over long periods under harsh environments such as ultraviolet radiation and temperature changes, with an expected service life of over 10 years, far exceeding that of traditional polyethylene or metal materials. Furthermore, the low density of engineering plastics significantly reduces the weight of the entire device, facilitating transportation and installation, while also reducing the additional load on the rainwater inlet structure.

[0034] A PC sealing plate can also be installed around the top edge of the device. This sealing plate not only serves to seal the surface, preventing water from bypassing the gap between the device and the rainwater inlet and ensuring that all rainwater is treated by the filtration and overflow device 2, but also enhances the structural stability of the entire device within the rainwater inlet, preventing shaking or displacement during use. The PC material has excellent toughness and aging resistance, enabling it to maintain its sealing effect for a long time.

[0035] The connection between the through hole 23 of the overflow device 2 and the overflow hole 14 of the interceptor frame 1 adopts a detachable structural design. This connection can be achieved through flange fitting, snap-fit ​​connection, or threaded connection. The advantage of the detachable connection is that when the overflow device 2 needs to be maintained or replaced separately, it can be easily separated from the interceptor frame 1 without having to remove the entire device from the rainwater inlet. This modular design concept is also reflected in the overall system architecture of the device. For large or non-standard sized rainwater inlets, multiple interceptor frames 1 and overflow devices 2 can be combined and installed, assembled into a whole using specialized connectors to meet the needs of different capacities and specifications.

[0036] The working principle of this invention is as follows: Figure 4 As shown, under normal light to moderate rain conditions, rainwater first enters the interception frame 1 through the rain grate 6, and then flows into the rainwater pipe 4 through the perforated mesh 11 around the perimeter and bottom of the interception frame 1. During this process, solid waste is intercepted by the mesh inside the interception frame 1, achieving solid-liquid separation. As the usage time increases, waste gradually accumulates inside the interception frame 1, which may cause some mesh holes to become clogged. In this case, the rainwater level will rise inside the interception frame 1. When the water level reaches the height of the side wall holes 22 of the overflow device 2, the water begins to flow through these holes 22 into the overflow device 2, and then flows directly into the rainwater pipe 4 through the bottom through-hole 23 and overflow hole 14, thus forming a backup drainage channel and effectively preventing the problem of reduced drainage capacity due to blockage. In extreme rainstorm conditions, even the overflow device 2 faces the risk of blockage, and the water level will rise further to the height of the top cover of the overflow device 2. At this time, the drainage holes on the top cover will come into play, providing additional drainage capacity. This multi-stage drainage mechanism ensures sufficient drainage capacity under various operating conditions, greatly reducing the risk of road flooding and urban waterlogging.

[0037] The device is very easy to maintain. For regular maintenance, personnel simply need to open the rain grate 6, remove the entire interceptor frame 1 through the handle hole 12, and empty the accumulated solid waste. If the overflow device 2 also needs cleaning, its top cover can be opened, or the entire overflow device 2 can be removed from the interceptor frame 1 for specialized cleaning. The entire maintenance process requires no special tools and no modifications to the rainwater inlet structure, significantly reducing long-term operation and maintenance costs.

[0038] like Figure 5 As shown, in this embodiment of the invention, one end of the interception frame 1 is also provided with an adjustment part 7. By tightening or loosening the adjustment bolt 71, the position of the adjustment part 7 can be changed, thereby changing the overall length or width of the interception frame 1 to adapt to different rainwater inlet sizes.

[0039] For special applications, such as industrial areas or coastal regions, special engineering plastics with stronger chemical corrosion resistance or salt spray resistance can be selected, or anti-corrosion coatings can be added to critical parts to further extend the service life of the device. In cold regions, heating elements can also be installed at the bottom of the device to prevent freezing in winter from affecting drainage function.

[0040] The overflow solid-liquid separation device for rainwater inlets of this invention effectively solves the contradiction between waste interception and drainage efficiency in traditional rainwater inlets through innovative structural design and material selection, achieving an optimal balance between interception efficiency and drainage capacity. Its modular design and highly adjustable characteristics allow it to flexibly adapt to various specifications of rainwater inlets, greatly improving the product's versatility and economy. The reinforced structural design and high-quality material selection ensure the device's reliability and durability during long-term use. The convenient maintenance design significantly reduces the total life-cycle operation and maintenance costs. These features give this invention broad application prospects and significant competitive advantages in various municipal drainage applications.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rainwater inlet overflow type solid-liquid separation device, characterized in that, include: The interception frame (1) is shaped to match the rainwater inlet and is used to install inside the concrete rainwater inlet (5); the interception frame (1) is provided with perforated mesh (11) around its perimeter and bottom for drainage and interception of solid waste; The interception frame (1) is provided with at least one overflow device (2), the overflow device (2) protrudes from the inside of the interception frame, and its bottom is provided with a through hole (23) that communicates with the overflow hole (14) at the bottom of the interception frame; The overflow device (2) has multiple holes (22) on its side wall for continuing to drain water when the interception frame is blocked; The interception frame (1) is equipped with a rain grate (6) at the top and is connected to the rainwater pipe (4) at the bottom.

2. The overflow-type solid-liquid separation device for rainwater inlets according to claim 1, characterized in that: The interception frame (1) is a cubic or cylindrical structure, and its outer wall is provided with reinforcing ribs (13) to enhance the structural strength.

3. The overflow-type solid-liquid separation device for rainwater inlets according to claim 1, characterized in that: The interceptor frame (1) is provided with a handle hole (12) for easy installation and removal.

4. The overflow-type solid-liquid separation device for rainwater inlets according to claim 1, characterized in that: The top of the overflow device (2) is provided with an openable cover plate (21), and the cover plate (21) is provided with a drain hole for adjusting the drainage flow or cleaning the interior.

5. The overflow-type solid-liquid separation device for rainwater inlets according to claim 1, characterized in that: The overflow device (2) is a cylindrical structure with an adjustable height to adapt to different water depth conditions.

6. The overflow-type solid-liquid separation device for rainwater inlets according to claim 1, characterized in that: The bottom of the interception frame (1) is provided with lifting adjustment feet (3), which can be adjusted in height by means of pins (31) or threaded structure to adapt to different rainwater inlet depths.

7. The overflow-type solid-liquid separation device for rainwater inlets according to claim 1, characterized in that: The interception frame (1) and the overflow device (2) are made of environmentally friendly resin or translational resin, and have corrosion resistance and impact resistance.

8. The overflow-type solid-liquid separation device for rainwater inlets according to claim 1, characterized in that: The device is equipped with PC roll-up plates around its top perimeter to enhance sealing and structural stability.

9. The overflow-type solid-liquid separation device for rainwater inlets according to claim 1, characterized in that: The overflow device (2) has a detachable connection structure between the through hole (23) and the overflow hole (14) of the interception frame (1), which facilitates maintenance and replacement; the device is modular in design and multiple interception frames and overflow devices can be installed according to the size of the rainwater inlet.

10. The overflow-type solid-liquid separation device for rainwater inlets according to claim 1, characterized in that: One end of the interception frame (1) is provided with an adjustment part (7) for adjusting the length or width of the interception frame (1).

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