Cascade filter overflow device

Abstract

The utility model provides a kind of cascade filter composite overflow device, including the sequentially connected cylinder cover, cylinder body and drainage cylinder from top to bottom, cylinder cover is provided with the boss that is protruding upward;The top of boss is provided with the recess that is recessed downward;The recess is filled with the first filler for filtering;The bottom and side of recess are provided with water inlet hole. By filling the first filler in the cylinder cover recess, and cooperating with the water inlet hole provided in the bottom and side, a multiple filtering barrier is constructed. The first filler can effectively block solid impurities such as leaves, silt and garbage from entering the wellbore directly, preventing impurities from flowing into the rainwater pipe network with the water flow from the source, significantly reducing the risk of pipe blockage and the possibility of water pollution, and reducing maintenance costs and urban waterlogging hazards.

Description

Technical Field

[0001] This utility model relates to the field of overflow well technology, specifically a stepped filter composite overflow device. Background Technology

[0002] Overflow wells, as a key component of the drainage system of sponge cities, are widely installed in sponge facilities such as gardens, sunken green spaces, and grassed swales. Their function is to safely guide excess rainwater into the rainwater pipe network in an overflow manner when the rainfall intensity exceeds the infiltration or water storage capacity of the facility, thereby preventing waterlogging and ensuring the normal operation of the facility.

[0003] In the prior art, Chinese patent CN220908603U discloses a composite slow-release micro overflow device, including an installation well cylinder. The upper end of the well cylinder has a drainage protrusion, and the upper surface of the drainage protrusion has a second drainage hole. A first drainage hole is provided at the connection between the upper surface and the side surface. When it rains, some rainwater flows into the cylinder through the first and second drainage holes.

[0004] However, the existing structure still has significant drawbacks: due to the large opening size of the second drainage hole and its location at the top of the manhole, solid impurities such as leaves, silt, and garbage can easily enter the manhole and flow into the stormwater drainage network with the water flow. These impurities not only pollute the water in the network but may also gradually accumulate and cause blockages, reducing the system's drainage capacity, increasing maintenance costs, and raising the risk of urban flooding.

[0005] Therefore, there is an urgent need for a new type of overflow well structure that can effectively intercept solid impurities while efficiently discharging excessive rainwater, avoiding secondary pollution and blockage of the rainwater pipe network, and improving the reliability and sustainability of the sponge city drainage system. Utility Model Content

[0006] To address the technical problems in the background art, this utility model discloses a stepped filter composite overflow device.

[0007] This utility model provides a stepped filter composite overflow device, including a cylinder cover, a cylinder body and a drain cylinder connected in sequence from top to bottom, and the cylinder cover is provided with an upward protruding boss; The top of the boss is provided with a recessed platform that is recessed downwards; The recessed area is filled with a first packing material for filtration. Water inlet holes are provided at the bottom and sides of the recessed platform.

[0008] The beneficial effects of the above settings are: 1. By filling the recessed area of ​​the cylinder cover with a first filler material, and in conjunction with the water inlet holes at the bottom and sides, a multi-layered filtration barrier is constructed. The first filler material can effectively prevent solid impurities such as leaves, silt, and garbage from directly entering the inside of the well, thus preventing impurities from flowing into the rainwater pipe network with the water flow from the source, significantly reducing the risk of pipe blockage and water pollution, and reducing maintenance costs and the risk of urban flooding.

[0009] 2. The recessed platform structure and multi-directional water inlet (bottom + side) design expand the rainwater collection area, allowing for rapid collection of excess rainwater from multiple directions during periods of heavy rainfall. The primary filler material acts as both a filter and a slow-release agent, preventing sudden water flow impacts and ensuring that rainwater smoothly enters the well and is discharged into the pipe network, guaranteeing the normal operation and drainage stability of the sponge city infrastructure under heavy rainfall conditions.

[0010] 3. The first filler also increases the weight of the cap, making the cap structure more stable.

[0011] 4. The protrusions protrude from the ground, making them easy to see and also obstructing pedestrians, preventing the cylinder cover from being damaged by accidental collisions.

[0012] Conventional overflow holes are flush with the end face of the cylinder cap, making them prone to clogging. Therefore, a further improvement is made: an upward-protruding overflow ring is provided on the outer side of the boss; the overflow hole is located on top of the overflow ring. The boss, being higher than the ground, acts as a barrier against solid impurities, preventing the overflow hole from becoming clogged.

[0013] The design of connecting the overflow ring and the boss would lead to a complex structure and high manufacturing difficulty for the cylinder cover. Therefore, a gap is provided between the overflow ring and the boss, forming a ring-shaped groove. Under normal circumstances, debris would accumulate in the groove, which is a redundant design. Therefore, to turn waste into treasure, a water inlet is also provided at the bottom of the groove, and the groove is filled with a second packing material for filtration. This design not only increases the water inflow but also improves the filtration effect.

[0014] The root of the boss has low strength and is prone to breakage. Therefore, a further improvement is made by providing an integrally formed reinforcing ring at the root of the boss.

[0015] The addition of a reinforcing ring reduces the water inlet area of ​​the cylinder cover, affecting the water flow rate. Therefore, a further improvement is made: the reinforcing ring has multiple evenly distributed slots running through both the top and bottom; these slots divide the reinforcing ring into multiple evenly distributed reinforcing blocks; the boss is composed of multiple annular, axially spaced transverse bands and multiple spaced longitudinal bands that are perpendicularly intersecting the transverse bands; the number of reinforcing blocks matches the number of longitudinal bands; and the reinforcing blocks are connected to the lower ends of their corresponding longitudinal bands. This design also ensures a uniform strength distribution in the cylinder cover, making it less prone to breakage.

[0016] To further improve the filtration effect, a sludge trap is installed on the underside of the cylinder cover.

[0017] The overflow well is made of plastic. Therefore, in order to improve the structural strength of the overflow well, the following design is made: the outer walls of the cylinder are provided with staggered transverse and longitudinal reinforcing ribs; the transverse reinforcing ribs are arranged in a horizontal ring and there are multiple ribs, which are arranged at intervals in the vertical direction; the longitudinal reinforcing ribs extend axially along the cylinder and are arranged at uniform intervals in the circumference.

[0018] In Chinese patent CN220908603U, the sidewall of the slow-release well casing has multiple slow-release holes. When some of these holes are blocked, the water pressure on the well casing will differ, causing deformation of the well wall. Based on this, a further improvement is made: the inner and outer sides of the casing are not connected. With the help of the boss and concave platforms, the water inlet area is larger. During overflow, water flows not only from the overflow hole but also from the inlet hole, resulting in a larger overflow area and avoiding the problem of delayed overflow caused by the removal of the slow-release holes.

[0019] Bosses and concave surfaces are generally designed as cylinders, which not only have low strength and are prone to twisting and deformation, but also have a small distance between them, making them difficult to process. Based on this, a further improvement is made: both bosses and concave surfaces are truncated cones; the constricted end of the boss faces upward; and the constricted end of the concave surface faces downward. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a front sectional view of the present invention; In the diagram: 1. Cover; 2. Body; 4. Drainage tube; 5. Boss; 6. Recess; 7. Inlet hole; 8. Overflow ring; 9. Overflow hole; 10. Groove; 11. Reinforcing ring; 12. Slot; 13. Sludge trap; 14. Horizontal reinforcing rib; 15. Longitudinal reinforcing rib; 16. Reinforcing block; 51. Horizontal band; 52. Longitudinal band. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] like Figure 1 As shown, this utility model discloses a stepped filter composite overflow device, which includes a cylinder cover 1, a cylinder body 2 and a drain cylinder 4 connected in sequence from top to bottom.

[0024] like Figure 2 As shown, the cylinder cover 1 includes a circular cover plate, the outer side of which is fixedly connected to the upper end of the cylinder body 2 by bolts and nuts. A raised boss 5 is provided at the center of the cover plate, and a recessed platform 6 is provided at the top of the boss 5. Water inlet holes 7 are evenly distributed on the side walls of the boss 5, the side walls of the recessed platform 6, and the bottom of the recessed platform 6, allowing rainwater to flow into the overflow well through the water inlet holes 7. The recessed platform 6 is filled with a first filler material for filtration. In this embodiment, the first filler material is pebbles. Its function is: 1. By filling the recessed platform 6 of the cylinder cover 1 with a layer of pebbles, and in conjunction with the water inlet holes 7 at the bottom and sides, a multi-layered filtration barrier is constructed. The gaps between the pebbles can effectively prevent solid impurities such as leaves, mud, and garbage from directly entering the well cylinder, preventing impurities from flowing into the rainwater pipe network with the water flow from the source, significantly reducing the risk of pipe blockage and water pollution, reducing maintenance costs and the risk of urban flooding. 2. The recessed platform 6 and the multi-directional water inlet 7 (bottom + side) design expand the rainwater collection area, allowing for rapid collection of excess rainwater from multiple directions during periods of heavy rainfall. The pebble layer acts as both a filter and a slow-release agent, preventing sudden water flow impacts and ensuring that rainwater smoothly enters the well and is discharged into the pipe network, guaranteeing the normal operation and drainage stability of the sponge city infrastructure under heavy rainfall conditions. 3. The pebbles also add weight to the cover 1, making its structure more stable. 4. The raised platform 5 protrudes from the ground, making it easily visible and also acting as a barrier to prevent accidental collisions with pedestrians, thus preventing damage to the cover 1.

[0025] Both the boss 5 and the recess 6 are frustum-shaped; the constricted end of the boss 5 faces upward; the constricted end of the recess 6 faces downward. This design makes the boss 5 and the recess 6 more structurally strong and less prone to deformation; moreover, the distance between the boss 5 and the recess 6 increases from top to bottom, which simplifies the mold structure and reduces processing difficulty and cost.

[0026] An overflow ring 8, concentrically arranged and protruding upward, is provided on the outer side of the boss 5, and an overflow hole 9 is located on the top of the overflow ring 8. During overflow, water flows outward from the overflow hole 9. The boss 5 is higher than the ground, which can block solid impurities and prevent the overflow hole 9 from becoming clogged.

[0027] Furthermore, a gap is provided between the boss 5 and the overflow ring 8 to simplify the structure of the injection mold and reduce costs. This gap forms an annular groove 10, and a water inlet hole 7 is provided at the bottom of the groove 10. The groove 10 is filled with a second filler for filtration; in this embodiment, the second filler is gravel. This arrangement not only increases the water inflow but also improves the filtration effect.

[0028] The base of the boss 5 is connected to an integrally formed reinforcing ring 11 to improve the structural strength of the boss 5 and make the base of the boss 5 less prone to breakage. The reinforcing ring 11 is provided with multiple evenly distributed slots 12 that run through the upper and lower sides; the slots 12 divide the reinforcing ring 11 into multiple evenly distributed reinforcing blocks 16; the boss 5 is composed of multiple annular, axially spaced transverse bands 51 and multiple spaced longitudinal bands 52 that are perpendicularly staggered to the transverse bands 51; the number of reinforcing blocks 16 is the same as the number of longitudinal bands 52; the reinforcing blocks 16 are connected to the lower ends of the corresponding longitudinal bands 52. The above configuration also makes the strength distribution of the cylinder cover 1 uniform and less prone to breakage. Moreover, the slots 12 also increase the flow area for water inlet.

[0029] like Figure 3 As shown, a sludge trap 13 is installed at the upper end of the cylinder 2, which covers all the water inlet holes 7 to further improve the filtration effect.

[0030] The outer walls of the cylinder body 2 are provided with staggered transverse reinforcing ribs 14 and longitudinal reinforcing ribs 15. The transverse reinforcing ribs 14 are arranged in a horizontal ring and multiple of them are arranged at vertical intervals. The longitudinal reinforcing ribs 15 extend axially from the cylinder body 2 and are arranged at uniform intervals around the circumference. Since overflow wells are generally made of plastic, the installation of transverse reinforcing ribs 14 and vertical reinforcing ribs can improve the structural strength of the overflow well and extend its service life.

[0031] The inner and outer sides of the cylinder body 2 are not connected. Compared to traditional slow-release well cylinders with slow-release holes, this design, with its interconnected slow-release holes, offers higher structural strength and prevents deformation due to uneven water pressure. Furthermore, the presence of the boss 5 and the recessed platform 6 increases the inlet area, ensuring that during overflow, water flows not only from the overflow hole 9 but also from the inlet hole 7, resulting in a larger overflow area and eliminating the problem of delayed overflow caused by the absence of slow-release holes.

[0032] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A stepped filter composite overflow device, comprising a cylinder cover (1), a cylinder body (2), and a drain cylinder (4) connected sequentially from top to bottom, characterized in that: The cylinder cover (1) is provided with an upwardly protruding boss (5); The top of the boss (5) is provided with a recessed platform (6) that is recessed downwards. The recess (6) is filled with a first filler for filtration; The bottom and sides of the recessed platform (6) are provided with water inlet holes (7).

2. The stepped filter composite overflow device according to claim 1, characterized in that: An upward-protruding overflow ring (8) is provided on the outer side of the boss (5); An overflow hole (9) is located on top of the overflow ring (8).

3. The stepped filter composite overflow device according to claim 2, characterized in that: The overflow ring (8) and the boss (5) form an annular groove (10). The bottom of the groove (10) is provided with a water inlet hole (7); The groove (10) is filled with a second filler for filtration.

4. The stepped filter composite overflow device according to claim 2, characterized in that: The root of the boss (5) is provided with an integrally formed reinforcing ring (11).

5. The stepped filter composite overflow device according to claim 4, characterized in that: The reinforcing ring (11) is provided with multiple evenly distributed slots (12) that penetrate the upper and lower sides. The slot (12) divides the reinforcing ring (11) into multiple evenly distributed reinforcing blocks (16). The boss (5) is composed of multiple annular, axially spaced transverse bands (51) and multiple spaced longitudinal bands (52) that are perpendicularly intersecting the transverse bands (51). The number of the reinforcing blocks (16) is the same as the number of the longitudinal strips (52); The reinforcing block (16) is connected to the lower end of the corresponding longitudinal strip (52).

6. The stepped filter composite overflow device according to claim 1, characterized in that: A sludge trap (13) is provided on the lower side of the cylinder cover (1).

7. The stepped filter composite overflow device according to claim 1, characterized in that: The outer walls of the cylinder (2) are provided with staggered transverse reinforcing ribs (14) and longitudinal reinforcing ribs (15). The transverse reinforcing ribs (14) are arranged in a horizontal ring and are provided in multiples, arranged at vertical intervals; The longitudinal reinforcing ribs (15) extend axially along the cylinder body (2) and are arranged at uniform intervals around the circumference.

8. The stepped filter composite overflow device according to claim 7, characterized in that: The inner and outer sides of the cylinder (2) are not connected.

9. The stepped filter composite overflow device according to claim 1, characterized in that: Both the protrusion (5) and the concave platform (6) are in the shape of a frustum; The constricted end of the boss (5) faces upward; The concave end of the recessed platform (6) faces downward.

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