Filter screen cylinder of water falling hopper
The double-layer filter cylinder structure solves the problem of clogging in traditional drain hoppers, achieving effective filtration of debris and unobstructed pipes, ensuring building safety, and reducing maintenance difficulty and cost.
Patent Information
- Application Number
- CN202520186303.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-06
AI Technical Summary
The traditional 87-type cast iron downpipe's grating design cannot effectively block small debris, causing the downpipe to become clogged easily, making cleaning difficult, affecting roof and indoor water leakage problems, and resulting in high maintenance costs.
The water hopper filter cylinder adopts a double-layer filtration structure, consisting of a filter cylinder body and a bottom filter screen with apertures of 25mm and 10mm respectively. The cylinder body is wrapped with wire mesh, and the bottom is welded with steel plate pressing plates. The steel wire clamp flange design facilitates installation and disassembly.
It effectively filters large and small debris, reduces the risk of clogging, keeps the drain pipe unobstructed, prevents water leakage, extends service life, simplifies maintenance, and reduces costs.
Smart Images
Figure CN223793792U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of building construction technology, and specifically relates to a drain filter screen cylinder. Background Technology
[0002] In the construction industry, roof drainage systems are a crucial component in ensuring the normal use and structural safety of buildings, with the Type 87 cast iron rainwater hopper being widely used. However, the Type 87 cast iron rainwater hoppers commonly found on the market, including siphon type, internal cap type, and internal flat cap type, have revealed serious drainage blockage problems in actual use.
[0003] During roof drainage, rainwater carries various debris and waste, such as fallen leaves, branches, dust, plastic waste, and small particles left over from construction. The traditional 87-type cast iron downpipe's original grating design has many flaws; its grating spacing is large and its structure is simple, failing to effectively prevent small debris from entering the downpipe. Over time, this debris gradually accumulates inside the downpipe. In older buildings or areas with complex environments, such as buildings near parks with many trees or construction sites, large amounts of leaves and silt flow into the downpipe with rainwater during the rainy season, potentially causing partial blockages in a short period. Over time, the blockage worsens, the downpipe's cross-sectional area decreases, the water flow velocity reduces, and the drainage capacity significantly declines. Furthermore, cleaning clogged pipes is extremely difficult. Since downpipes are typically installed within the building's internal structure, with some located above the ceiling, cleaning requires repeated manual disassembly and reassembly of the pipe connections in the ceiling. This process not only consumes significant manpower, resources, and time, but also risks damaging the interior finishes and piping system during disassembly and reassembly, increasing maintenance costs. In addition, if the downpipe blockage is not resolved promptly, rainwater cannot drain smoothly from the roof, gradually seeping into the roof structure and damaging the waterproofing layer, leading to leaks in the roof and interior. This not only affects the building's normal functionality, causing dampness and mold on interior walls, impacting aesthetics and living comfort, but also poses a potential threat to the building's structural safety. Prolonged waterlogging can reduce the roof's structural strength, shortening the building's lifespan. Utility Model Content
[0004] This utility model proposes a rainwater hopper filter screen cylinder to solve the technical problem that traditional rainwater hoppers in the prior art cannot effectively block garbage, debris and other impurities, which easily causes the rainwater pipe to become clogged. Clogged rainwater pipes are difficult to clean, resulting in water leakage from the roof and interior.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A drain hopper filter cylinder, characterized in that it includes a filter cylinder body, a bottom filter screen is installed at the bottom of the filter cylinder body, the filter cylinder body and the bottom filter screen constitute a filter cylinder, the filter cylinder is placed above the drain hopper, and the aperture of the filter cylinder body is larger than the aperture of the bottom filter screen.
[0007] The mesh size of the bottom filter screen is 10mm.
[0008] The filter cylinder is made of dense wire mesh.
[0009] The mesh size of the filter cylinder is 25mm.
[0010] An insert cap is embedded inside the filter cylinder.
[0011] The bottom outer perimeter of the filter screen cylinder is made of steel plate pressing.
[0012] The steel plate is a ring-shaped structure with a hollow central area. The bottom filter screen is located in this hollow area and is welded and fixed to the steel plate.
[0013] The inner ring diameter of the steel plate pressing sheet is the same as the outer edge diameter of the filter screen cylinder, and the bottom of the filter screen cylinder is welded to the inner ring of the steel plate pressing sheet.
[0014] A steel wire clamp flange is welded to the upper end of the filter screen cylinder, and the steel wire clamp flange is designed with a soft edge.
[0015] The inside of the steel wire clamp flange is a steel wire hoop, which is fixed to the top of the filter cylinder body through the steel wire hoop.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] This utility model discloses a drain filter cylinder, in which the filter cylinder body and the bottom filter screen together form a double-layer filter structure. Compared with the traditional single grid structure of drains, it greatly improves the filtration effect on various debris, effectively reduces the impurities entering the drain pipe, and lowers the risk of pipe blockage. At the same time, through effective filtration, it helps to maintain the smooth flow of water in the drain pipe, avoids drainage problems caused by debris blockage, and thus prevents roof and indoor water leakage caused by water accumulation, ensuring the normal use and structural safety of the building, and extending the service life of the building's drainage system.
[0018] Furthermore, the filter screen in the filter cylinder has a mesh size of 25mm, while the bottom filter screen has a mesh size of 10mm. The two mesh sizes allow for two-stage filtration: the filter cylinder filters out large debris, while the bottom filter screen filters out small particles. This effectively improves filtration performance, ensures smooth drainage from the drain pipe, and fundamentally solves the problem of poor drainage caused by garbage blockage.
[0019] Furthermore, the bottom filter screen is welded to the bottom of the cylinder by steel plate pressing, making the overall structure stable and firm. It is not easily damaged or deformed during water flow impact and daily use, ensuring the long-term stable operation of the filter cylinder, extending the service life of the filter cylinder, and reducing the need for filter cylinder replacement or maintenance.
[0020] Furthermore, the soft edge design of the steel wire clamp's flange facilitates the removal of the inner-insertion cap, making the installation and cleaning of the device simple and easy. The filter cylinder can be used easily without complicated tools and professional skills, greatly saving manpower and time costs. At the same time, it also effectively reduces the difficulty and cost of maintenance to a certain extent. Attached Figure Description
[0021] Figure 1 : 3D schematic diagram of cast iron drain hopper filter screen cylinder;
[0022] Figure 2 : Front view of cast iron drain hopper filter screen cylinder;
[0023] Figure 3 Top view of cast iron drain hopper filter screen cylinder;
[0024] Figure 4 : A partially enlarged schematic diagram of the filter screen in a cast iron drain hopper.
[0025] Labeling descriptions: 1. Steel wire clamp flange; 2. Steel plate pressing plate; 3. Filter screen cylinder body; 4. Bottom filter screen; 5. Internal plug cap; 6. Drain bucket. Detailed Implementation
[0026] To further understand the present invention, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are merely illustrative and not intended to limit the scope of the invention.
[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0029] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0031] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.
[0032] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.
[0033] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0034] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.
[0035] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[0036] See Figures 1 to 4 The cast iron drain filter cylinder of the present invention comprises a filter cylinder body 3, a steel plate pressing plate 2, and a bottom filter screen 4. The cast iron drain filter cylinder is placed above a drain hopper 6, and the lower surface of the bottom filter screen 4 is placed above the drain hopper 6. The steel filter cylinder body 3 has a cylindrical tubular structure, and the steel plate pressing plate 2 has a ring-shaped structure. The inner ring diameter of the steel plate pressing plate 2 is equal to the outer ring diameter of the filter cylinder body 3. The steel plate pressing plate 2 is welded to the bottom outer circumference of the filter cylinder body 3. The bottom filter screen 4 is installed at the bottom of the filter cylinder body 3. The bottom filter screen 4 is located in the hollow area of the steel plate pressing plate 2 and forms a filter structure with the steel plate pressing plate 2. An insert cap 5 is placed inside the filter cylinder body 3, and the cap part of the insert cap is snapped and fixed to the upper opening of the filter cylinder body 3.
[0037] This embodiment proposes a water dropper filter screen cylinder, the specific implementation method of which is as follows:
[0038] This embodiment describes a filter screen cylinder for a type 87 downspout. After the type 87 downspout is installed and the roof finishing layer is completed, the pre-fabricated filter screen sleeve is prepared. Ensure that the filter screen cylinder body 3, the bottom filter screen 4, and the wire clamp flange 1 at the top of the filter screen cylinder body 3 are securely connected without damage or deformation. The filter screen cylinder body 3, the bottom filter screen 4, and the wire clamp flange 1 constitute the filter screen sleeve. The inner diameter of the filter screen cylinder body 3 is 40mm larger than the outer diameter of the inner plug-in cap 5. The outer diameter of the inner plug-in cap 5 purchased on-site is 235mm.
[0039] Place the filter sleeve onto the inner plug cap 5, so that the inner plug cap 5 is embedded inside the filter sleeve body 3. Place the bottom filter screen 4 on the filter sleeve with the inner plug cap 5 facing down directly on the upper part of the drain hopper 6. The top of the filter cylinder body 3 is welded with a wire clamp flange 1. The inside of the wire clamp flange 1 is a wire hoop, and the upper end of the wire hoop is the flange part. The flange part of the wire clamp flange 1 is wrapped with soft rubber. The processing dimension of the soft rubber wrap is 40mm wide. The wire clamp flange 1 is fixed to the top of the filter cylinder body 3 through the wire hoop. The wire clamp flange 1 fits tightly against the connection between the inner plug-in cap 5 and the filter cylinder body 3. The soft connection characteristic of the rubber of the wire clamp flange 1 facilitates the disassembly and separation of the inner plug-in cap 5. The wire fixing structure of the wire hoop inside the wire clamp flange 1 can also ensure the fixed connection between the wire clamp flange 1 and the filter cylinder body 3.
[0040] When rainwater flows into the filter cylinder from the inlet, it flows downwards through the filter screen due to gravity. First, the water flows through the filter cylinder body 3, which is made of dense wire mesh with large holes. The wire mesh has a diameter of 2mm and an aperture of 25mm. The water flows through the large holes of the filter cylinder body 3, where the wire mesh acts as the first layer of filtration. Larger debris (such as large leaves or plastic bags) is blocked outside the cylinder. After initial filtration by the filter cylinder body 3, the water enters the interior of the filter cylinder and continues to flow downwards to the bottom filter screen 4. The bottom filter screen 4 acts as the second layer of filtration. Its mesh has smaller holes, and it is made of 2mm diameter wire with an aperture of 10mm. The water flows downwards through the small holes of the bottom filter screen 4, further filtering out fine impurities (such as sand, gravel, and small branches). Finally, the rainwater, after being filtered by the double layer of filter cylinder 3 and bottom filter plate 4, is smoothly discharged through the downpipe, achieving effective separation of solids and liquids, ensuring that the downpipe remains unobstructed for a long time, and avoiding roof and indoor water leakage problems caused by blockage.
[0041] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.
Claims
1. A strainer basket, characterized by comprising: The filter screen barrel body (3) is provided with a bottom filter screen (4) at the bottom of the filter screen barrel body (3), and the filter screen barrel body (3) and the bottom filter screen (4) constitute a filter screen barrel, which is placed above a downspout (6), and the pore size of the filter screen barrel body (3) is larger than that of the bottom filter screen (4).
2. A strum box screen cylinder according to claim 1, wherein, The pore size of the bottom filter screen (4) is 10 mm.
3. A strainer basket according to claim 1, wherein The barrel body of the filter screen barrel body (3) is wrapped by dense steel wire mesh.
4. A strum box screen cylinder according to claim 3, wherein, The pore size of the filter screen barrel body (3) is 25 mm.
5. A strum box screen cylinder according to claim 4, wherein, The filter screen barrel body (3) is embedded with an inner plug cap (5).
6. A strainer basket according to claim 1, wherein The bottom outer periphery of the filter screen barrel body (3) is a steel plate pressing piece (2), which is welded to the bottom outer periphery of the filter screen barrel body (3).
7. A strum box screen cylinder according to claim 6, wherein, The steel plate pressing piece (2) is in a ring structure, the central part of the steel plate pressing piece (2) is a hollow area, and the bottom filter screen (4) is located in the hollow area and is welded and fixed with the steel plate pressing piece (2).
8. A strum box screen cylinder according to claim 7, wherein, The inner ring diameter of the steel plate pressing piece (2) is the same as the outer edge diameter of the filter screen barrel body (3), and the bottom of the filter screen barrel body (3) is welded to the inner ring of the steel plate pressing piece (2).
9. A strainer basket according to claim 1, wherein A steel wire clamp flange (1) is further welded to the upper end of the filter screen barrel body (3), and the steel wire clamp flange (1) is designed with a soft edge.
10. A strum box screen cylinder according to claim 9, wherein, The steel wire clamp flange (1) is internally provided with a steel wire hoop, which is fixed with the top end of the barrel filter screen barrel body (3).