Municipal road drainage filtering device

Abstract

The utility model belongs to the technical field of drainage devices, and particularly relates to a municipal road drainage filtering device which comprises a fixed box, a movable frame and a precipitation tank, a rough filtration cover plate is detachably mounted at the upper end of the fixed box, a drainage pipe is connected to the bottom of the fixed box, the movable frame is detachably mounted in the fixed box, and the precipitation tank is connected with the rough filtration cover plate. A medium-efficiency filter screen is arranged at the upper end of the movable frame, a connecting rod is arranged in the middle of the medium-efficiency filter screen, the device is installed in a sewer through the fixed box, the coarse filtration cover plate is used for preliminarily filtering large impurities such as leaves and plastic bags, and then the medium-efficiency filter screen is used for filtering stones and large impurities which are not intercepted by the coarse filtration cover plate; then the water flow intensively impacts the buffering part, the impact force of the water flow is weakened, the water flow falls into the precipitation part to be precipitated, a large number of impurities are gathered to the bottom of the precipitation part along with accumulation of the water flow, the water flow flows into the drainage pipe through the water passing holes, impurity discharge caused by water flow impact or large water quantity is weakened, and the precipitation efficiency of the impurities is improved.

Description

Technical Field

[0001] This utility model belongs to the field of drainage device technology, specifically relating to a municipal road drainage filtration device. Background Technology

[0002] In urban environments, rainwater washes over impermeable surfaces such as rooftops, roads, and parking lots as it falls. These surfaces often accumulate large amounts of pollutants, such as road debris and silt. When rainwater forms runoff and enters the drainage system, it needs to be filtered by drainage filtration devices to reduce the amount of pollutants that clog drainage pipes or flow directly into natural water bodies such as rivers and lakes, which can lead to environmental problems such as eutrophication and water quality deterioration.

[0003] According to Chinese patent document CN221480996U, a municipal road drainage filtration device is disclosed, specifically relating to the field of drainage device technology. It includes a fixed box, with a limiting plate integrally formed on the inner wall of the fixed box. A support plate is provided on the top outer wall of the limiting plate, and a filter housing is integrally formed on the bottom outer wall of the support plate, located below the limiting plate. A water passage hole and a drainage groove are opened on one side outer wall of the filter housing, with the water passage hole located below the drainage groove, and the drainage groove located between the water passage hole and the support plate. A sedimentation tank is provided on the bottom inner wall of the filter housing, located below the water passage hole. A top cover is provided on the top outer wall of the fixed box. This invention, through the filter body and top cover, allows the top cover to filter impurities such as leaves, while the sedimentation tank inside the filter body filters silt and sand. This effectively filters road drainage during use, reducing the entry of silt, leaves, and other impurities into the drainage pipes, thus keeping the drainage pipes unobstructed.

[0004] Based on the search of the aforementioned patents and the findings of existing equipment, while these devices can filter road drainage and reduce the entry of impurities such as mud and leaves into the drainage pipes, they are only effective when rainfall is low. When rainfall is heavy or the water flow is fast, impurities in the water may not have time to settle before being carried out of the drainage holes by the water flow, or the disturbance caused by the direct impact of the water flow may cause the settled mud and other impurities to remix with the water flow, resulting in water entering the drainage pipe still containing a large number of impurities, which may lead to blockage of the drainage pipe. Therefore, to address the above problems, we propose a municipal road drainage filtration device. Utility Model Content

[0005] To address the above problems, the purpose of this utility model is to provide a municipal road drainage filtration device that reduces the discharge of impurities caused by water flow impact or large water volume, and improves the sedimentation efficiency of impurities.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a municipal road drainage filtration device, comprising a fixed box, a movable frame, and a sedimentation tank. A coarse filter cover is detachably installed on the upper end of the fixed box, and a drain pipe is connected to the bottom of the fixed box. The movable frame is detachably installed inside the fixed box, and a medium-efficiency filter screen is provided on the upper end of the movable frame. A connecting rod is provided in the middle of the medium-efficiency filter screen, and a buffer part for reducing the impact force of water flow is provided at the bottom of the connecting rod. The inner diameter of the buffer part gradually increases from top to bottom. The sedimentation tank includes a water passage part detachably connected to the bottom of the movable frame and a sedimentation part integrally formed and connected to the bottom of the water passage part. Multiple water passage holes are provided on the water passage part.

[0007] The beneficial effects of this utility model are as follows: By installing the fixed box inside the sewer, the coarse filter cover plate performs preliminary filtration of large impurities such as leaves and plastic bags. Then, the medium-efficiency filter screen filters pebbles and other large impurities that were not intercepted by the coarse filter cover plate. Then, the water flow concentrates and impacts the buffer section, reducing the impact force of the water flow, and the impurities fall into the sedimentation section for sedimentation. As the water flow accumulates, a large number of impurities gather at the bottom of the sedimentation section. The water flow flows into the drain pipe through the water passage hole, reducing the discharge of impurities due to water flow impact or large water volume, and improving the sedimentation efficiency of impurities.

[0008] To improve sedimentation efficiency;

[0009] As a further improvement to the above technical solution: the precipitation section is funnel-shaped and its inner diameter gradually decreases from top to bottom.

[0010] The beneficial effects of this improvement are: the inclined inner wall of the sedimentation section makes it easier for impurities to move downwards along the inner wall, thereby accelerating the sedimentation speed and improving the sedimentation efficiency in a short time.

[0011] To increase the filtration area;

[0012] As a further improvement to the above technical solution: the medium-efficiency filter is funnel-shaped and its inner diameter gradually decreases from top to bottom.

[0013] The beneficial effect of this improvement is that the funnel-shaped medium-efficiency filter can intercept these impurities more effectively in the same space.

[0014] To help reduce the water flow speed;

[0015] As a further improvement to the above technical solution: a flow-slowing ring is provided on the inner wall of the movable frame. The flow-slowing ring is located between the medium-efficiency filter and the buffer section. The inner diameter of the flow-slowing ring gradually decreases from top to bottom, and the bottom outlet of the flow-slowing ring is smaller than that of the buffer section.

[0016] The beneficial effect of this improvement is that when water falls from the medium-efficiency filter screen onto the slow-flow ring, the water flow will disperse in different directions, thereby reducing the speed of the water flow.

[0017] To improve overall stability;

[0018] As a further improvement to the above technical solution: the bottom of the fixed box is integrally formed with an auxiliary ring, and when the sedimentation tank is located inside the fixed box, the top outer edge of the water passage is located on the auxiliary ring.

[0019] The beneficial effects of this improvement are: the water passage section on the auxiliary ring provides support for the lower end of the whole, preventing instability caused by excessive water flow and impurities inside the sedimentation tank.

[0020] To reduce water leakage without settling;

[0021] As a further improvement to the above technical solution: the buffer section is located between the water passage section and the sedimentation section.

[0022] The beneficial effect of this improvement is that when the buffer section is located between the water passage section and the sedimentation section, the water will fall directly into the interior of the sedimentation section, reducing the possibility of water flowing out prematurely from the water passage hole. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 3 This utility model Figure 2 A magnified structural diagram of A in the middle;

[0026] Figure 4 This is a partial structural schematic diagram of the present invention.

[0027] In the diagram: 1. Fixed box; 2. Coarse filter cover plate; 3. Drain pipe; 4. Movable frame; 5. Medium efficiency filter screen; 6. Connecting rod; 7. Buffer section; 801. Sedimentation section; 802. Water passage section; 9. Water passage hole; 10. Slow flow ring; 11. Auxiliary ring. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0029] like Figure 1-4As shown, a municipal road drainage filtration device includes a fixed box 1. In use, the fixed box 1 can be directly installed on the inner wall of the sewer inlet. A coarse filter cover 2 is detachably installed on the upper end of the fixed box 1, and a drain pipe 3 is connected to the bottom of the fixed box 1. The coarse filter cover 2 can be detachably connected by snap-fit ​​or bolt fixing. When the fixed box 1 is fixed inside the sewer, the coarse filter cover 2 is flush with the ground. At this time, rainwater carrying various impurities falls into the fixed box 1 along the coarse filter cover 2, and then undergoes preliminary filtration through the coarse filter cover 2, blocking larger impurities such as leaves and plastic bags. A movable frame 4 is detachably installed inside the fixed box 1. A medium-efficiency filter screen 5 is provided at the upper end of the movable frame 4. The movable frame 4 can be fixed inside the fixed box 1 by snap-fit ​​or bolt fixing. In use, the water entering the fixed box 1 will be filtered again by the medium-efficiency filter screen 5, removing impurities such as pebbles, branches, and small leaves. A connecting rod 6 is provided in the middle of the medium-efficiency filter screen 5. The bottom of the sedimentation tank is equipped with a buffer section 7 to reduce the impact force of the water flow. The inner diameter of the buffer section 7 gradually increases from top to bottom. The water flow that is filtered again by the medium-efficiency filter screen 5 will impact the buffer section 7. At this time, the water flow will be dispersed, and the flow rate of the dispersed water flow will be further reduced, thus dispersing the impact force of the water flow. The sedimentation tank includes a water passage section 802 that is detachably connected to the bottom of the movable frame 4 and a sedimentation section 801 that is integrally formed and connected to the bottom of the water passage section 802. The water passage section 802 has multiple water passage holes 9. When the water flow after the impact force is reduced continues to fall into the sedimentation section 801, the water flow disturbance force inside the sedimentation section 801 will be reduced due to the weak water flow speed. Therefore, the impurities inside the water will settle to the bottom of the sedimentation section 801. As more and more water accumulates, the settled water will flow from the water passage holes 9 into the drain pipe 3 and be discharged. After a period of time, the movable frame 4 can be pulled out directly by the handle set at the upper end of the movable frame 4 to remove the sedimentation tank for cleaning.

[0030] Furthermore, the sedimentation section 801 is funnel-shaped with its inner diameter gradually decreasing from top to bottom. When in use, after the water flows into the sedimentation section 801, it will flow along the inclined inner wall. Under the action of gravity, impurities will more easily accumulate at the bottom of the sedimentation section 801. Due to the synergistic effect of the water flow direction and the gravity direction, the particle settling path is shorter and the disturbance is relatively small, so it can settle faster.

[0031] Furthermore, the medium-efficiency filter 5 is funnel-shaped with its inner diameter gradually decreasing from top to bottom. When in use, the inclined side of the medium-efficiency filter 5 has an increased surface area compared to the flat filter, providing additional area for filtration, which can intercept more impurities and improve filtration efficiency.

[0032] Furthermore, a slow-flow ring 10 is provided on the inner wall of the movable frame 4. The slow-flow ring 10 is located between the medium-efficiency filter screen 5 and the buffer section 7. The inner diameter of the slow-flow ring 10 gradually decreases from top to bottom, and the bottom outlet of the slow-flow ring 10 is smaller than that of the buffer section 7. During use, the water flow will first impact the slow-flow ring 10, and then the water flow speed will slow down after the impact. When it comes into contact with the buffer section 7 again, the water flow speed is even slower, and subsequent sedimentation will be easier, thus improving the overall drainage filtration efficiency.

[0033] Furthermore, the bottom of the fixed box 1 is integrally connected with an auxiliary ring 11. When the sedimentation tank is located inside the fixed box 1, the top outer edge of the water passage part 802 is located on the auxiliary ring 11. The upper end of the movable frame 4 is installed on the inner wall of the fixed box 1, while the bottom is not supported. When the water passage part 802 is located on top of the auxiliary ring 11, it is equivalent to supporting the entire bottom of the movable frame 4, avoiding gravity imbalance caused by the large amount of water flow or impurities inside the sedimentation part 801.

[0034] Furthermore, the buffer section 7 is located between the water passage section 802 and the sedimentation section 801. During use, after the water flow impacts the buffer section 7, it will fall directly into the sedimentation section 801, and the water will not splash out from the water passage hole 9 due to its higher position, which further improves the filtration efficiency.

[0035] The working principle and usage process of this utility model are as follows: When using this device, first fix the fixed box 1 inside the sewer. At this time, the coarse filter cover 2 is flush with the ground. When it rains, rainwater carrying impurities enters the interior of the fixed box 1 through the coarse filter cover 2, filtering out large impurities. Then, the water flow is filtered by the medium-efficiency filter screen 5 to remove some impurities such as stones. Then, the water flow falls onto the slow-flow ring 10 to disperse the impact force and reduce the speed. The water flow with reduced speed falls onto the buffer part 7 again to be slowed down again. Finally, the water flow falls into the sedimentation part 801 to settle. Then, the settled water flow increases and finally flows into the drain pipe 3 through the water passage hole 9.

[0036] It should be noted that, in this document, 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 process, method, article, or apparatus.

[0037] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the protection scope of this utility model.

Claims

1. A municipal road drainage filtering device comprising a stationary box (1), characterized in that: The upper end of the fixed box (1) is detachably provided with a coarse filter cover plate (2), and the bottom of the fixed box (1) is connected with a drain pipe (3); An activity frame (4) is detachably installed in the fixed box (1), the upper end of the activity frame (4) is provided with a medium-effect filter screen (5), the middle part of the medium-effect filter screen (5) is provided with a connecting rod (6), the bottom of the connecting rod (6) is provided with a buffer part (7) for weakening the impact force of water flow, and the inner diameter of the buffer part (7) gradually increases from top to bottom. A sediment tank is provided, which comprises a water passing part (802) detachably connected to the bottom of the activity frame (4) and a sediment part (801) integrally connected with the bottom of the water passing part (802), and a plurality of water passing holes (9) are formed in the water passing part (802).

2. The municipal road drainage filtering device according to claim 1, characterized in that: The sediment part (801) is funnel-shaped and the inner diameter thereof gradually decreases from top to bottom.

3. The municipal road drainage filtering device according to claim 1, characterized in that: The medium-effect filter screen (5) is funnel-shaped and the inner diameter thereof gradually decreases from top to bottom.

4. The municipal road drainage filtering device according to claim 1, characterized in that: A flow slowing ring (10) is arranged on the inner wall of the activity frame (4), the flow slowing ring (10) is located between the medium-effect filter screen (5) and the buffer part (7), the inner diameter of the flow slowing ring (10) gradually decreases from top to bottom, and the outlet of the bottom of the flow slowing ring (10) is smaller than the buffer part (7).

5. The municipal road drainage filtering device according to claim 1, characterized in that: The bottom of the fixed box (1) is integrally connected with an auxiliary ring (11), when the sediment tank is located in the fixed box (1), the top outer edge of the water passing part (802) is located on the auxiliary ring (11).

6. The municipal road drainage filtering device according to claim 1, characterized in that: The buffer part (7) is located between the water passing part (802) and the sediment part (801).

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