Anti-impact device and method for rainstorm runoff flow limiting and overflow

Abstract

The invention discloses a rainstorm runoff flow limiting and overflowing impact resistance device and method, and belongs to the technical field of runoff non-point source pollution abatement. The device comprises a flow dividing well body and further comprises a water inlet, a flow limiting opening and an overflowing opening; by adopting a double-stage shunting mode of initial-stage interception and middle-later-stage overflow and combining the design of horizontal symmetrical distribution of the water inlet and the flow limiting port and vertical distribution of the overflow port and the water inlet, water flow can be guided to form a stable transverse flowing path, so that high-pollution rainwater is intercepted in the initial stage of rainfall by virtue of a gravity flow principle, and high-pollution rainwater is intercepted in the middle-later stage of rainfall. Clean rainwater is rapidly discharged through the flow limiting opening, so that the short-time heavy rainfall condition can be effectively handled, the flow dividing stability in different rainfall stages can be guaranteed, the impact load resistance of the device is greatly improved, the system overload risk caused by sudden flow change is reduced, and it is ensured that the efficient pollution treatment effect is always kept in long-term operation.

Description

Technical Field

[0001] This invention belongs to the field of runoff non-point source pollution control technology, specifically a device and method for limiting and overflowing storm runoff to resist impact. Background Technology

[0002] In the field of runoff non-point source pollution control, flow-limiting overflow devices are key equipment for achieving differentiated diversion of high-pollution rainwater in the initial stage and clean rainwater in the middle and later stages. Their core function is to rely on the principle of gravity flow and the diversion structure design to guide the high-pollution initial rainwater into the treatment system for purification, while guiding the rainwater with reduced pollution concentration in the middle and later stages into the rainwater pipe network for discharge after the rainfall volume increases. This reduces the impact load of initial rainwater on the sewage treatment system and ensures the effectiveness of water environment treatment. Such devices are widely used in urban municipal drainage, sponge city construction and other scenarios, and are important infrastructure for improving the efficiency of runoff pollution control.

[0003] However, existing flow-limiting overflow devices for runoff non-point source pollution control still have many technical defects, making it difficult to meet the needs of efficient and stable pollution control: First, most devices have a parallel layout of the flow-limiting outlet and the overflow outlet, making it impossible to set the water diversion ratio according to the catchment area and pollution concentration. Moreover, in the middle and later stages of rainfall, water flow disturbance can easily cause the initial high-pollution rainwater to mix with the middle and later clean rainwater, severely weakening the diversion accuracy and pollution control effect. Second, traditional diversion outlets are mostly straight outlet structures, lacking anti-clogging design. Debris is easily deposited at the outlet when water flows through, which can easily lead to blockage problems in long-term operation, resulting in a decrease in drainage efficiency or even device failure. Third, the flow regulation structure of existing devices lacks flexibility and cannot quickly adapt to flow changes under different rainfall conditions. They also have weak resistance to shock loads and are difficult to cope with complex hydrological conditions such as short-term heavy rainfall, further limiting their application effect in actual treatment scenarios. Therefore, this paper proposes a flow-limiting overflow anti-shock device and diversion method for runoff non-point source pollution control to solve the problems mentioned in the background technology. Summary of the Invention

[0004] To address the problems mentioned in the background section, the present invention provides a device and method for limiting and resisting the impact of storm runoff overflow.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a stormwater runoff limiting and overflow anti-impact device, comprising a diversion well body, and further comprising:

[0006] The inlet is located on one side of the diversion well body and is used to introduce runoff sewage;

[0007] A flow restrictor is provided on the other side of the diversion well body and is horizontally distributed with the inlet to ensure that the water flow forms a transverse flow path in the cavity of the diversion well body.

[0008] An overflow outlet is fixedly connected to the outside of the diversion well body;

[0009] The regulating components are provided in two sets and face opposite directions, with the two sets of regulating components respectively installed inside the flow restrictor and the overflow port;

[0010] The regulating component includes a baffle plate, and an regulating plate is rotatably connected to one side of the baffle plate. Both the baffle plate and the regulating plate are semi-circular.

[0011] Preferably, the two baffles are fixedly connected inside the flow limiting port and the overflow port, respectively. The side of the baffle away from the regulating plate is arc-shaped and flush with the arc surface of the inner wall of the diversion well body.

[0012] Preferably, the baffle plate has a plurality of slots circumferentially formed on one side, and the bottom end of the adjusting plate away from the baffle plate is threadedly connected to a threaded rod, and one end of the threaded rod is fixedly connected to a stop block.

[0013] Preferably, a spring is sleeved on the outside of the threaded rod, and a ball is movably connected inside the adjusting plate. The two ends of the spring are fixedly connected to the ball and the inner wall of the adjusting plate, respectively.

[0014] Preferably, the sphere penetrates the side wall of the adjusting plate and is inserted into the inside of the slot, the diameter of the slot being the same as the diameter of the sphere, and the inner wall of the adjusting plate having a cylindrical groove for limiting the sphere.

[0015] Preferably, one side of the stop is arc-shaped, and the arc-shaped surface is in contact with the outer surface of the sphere, and the arc-shaped surface of the stop abuts against the sphere.

[0016] Preferably, the diversion well body is an integrated structure with a hollow interior, and the top of the diversion well body is provided with an installation platform for placing the well cover.

[0017] This application also proposes a diversion method for the treatment of runoff non-point source pollution, the steps of which are as follows:

[0018] S1. Before installation, calculate based on the catchment area, adjust the rotation angle of the regulating plate inside the flow restriction port and overflow port, and set the preset water distribution ratio by locking the angle after the regulating plate is rotated.

[0019] S2. Subsequently, the runoff wastewater is introduced into the diversion well body through the inlet, and flows out from the inlet by gravity, and is introduced into the treatment system to intercept highly polluted rainwater.

[0020] S3. Finally, as the flow rate continues to increase and the flow restriction outlet reaches full capacity, the liquid level rises. In the middle and later stages, rainwater flows out from the overflow outlet and enters the rainwater pipe network for discharge.

[0021] Preferably, the outlets of both the flow restrictor and the overflow outlet have inclined guide surfaces, which are used to guide the water flow out in a spiral vortex pattern.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] (1) This invention adopts a two-stage diversion mode of initial interception and mid-to-late stage overflow, and combines the horizontal symmetrical distribution of the inlet and the flow restriction port and the vertical distribution of the overflow port and the inlet. This can guide the water flow to form a stable lateral flow path. In the early stage of rainfall, it intercepts highly polluted rainwater based on the principle of gravity flow. In the mid-to-late stage of rainfall, it quickly discharges clean rainwater through the flow restriction port. Therefore, it can not only effectively cope with short-term heavy rainfall conditions, but also ensure the diversion stability of different rainfall stages, greatly improve the device's resistance to shock loads, reduce the risk of system overload caused by sudden flow changes, and ensure that it always maintains a high efficiency of pollution control effect in long-term operation.

[0024] (2) The present invention adopts an inclined guide surface design for both the flow limiting port and the overflow port, so that the water flow can form a spiral vortex when it passes through. Then, the centrifugal force is used to gather the impurities in the water at the center of the water flow and quickly carry them out. At the same time, the high-speed rotating water flow will continuously flush the inner wall of the outlet to avoid the accumulation and blockage of impurities. Through the vortex port design, self-cleaning can be achieved without additional power, thereby significantly reducing the maintenance cost and blockage risk of the device.

[0025] (3) By adjusting the two sets of adjustment components before installation, the flow distribution ratio between the flow limiting port and the overflow port can be set to a 4:6, 3:7, or 2:8 mode according to the project's rain catchment area and pollution concentration calculation results. During the adjustment process, the ball will make a sound when it enters the slot, so that the positioning can be fed back in real time to ensure the accuracy of the adjustment angle, thereby minimizing the impact load of the initial rainwater and the disturbance of the initial rainwater by the middle and later rainwater. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the front section structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the adjusting component after rotation according to the present invention;

[0029] Figure 4 This is a top cross-sectional view of the overflow port of the present invention;

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 This is an exploded view of the adjustment component of the present invention.

[0032] In the picture:

[0033] 1. Diversion well body;

[0034] 2. Water inlet;

[0035] 3. Flow control point;

[0036] 4. Overflow outlet;

[0037] 5. Adjustment component; 51. Baffle; 52. Adjustment plate; 53. Slot; 54. Threaded rod; 55. Stop block; 56. Spring; 57. Ball. Detailed Implementation

[0038] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0039] like Figures 1 to 6 As shown, the present invention provides a storm runoff limiting overflow and anti-impact device, including a diversion well body 1, and further comprising:

[0040] Inlet 2 is located on one side of the diversion well body 1 and is used to introduce runoff sewage;

[0041] Flow restriction port 3 is located on the other side of the diversion well body 1 and is horizontally distributed with the inlet 2 to ensure that the water flow forms a transverse flow path in the cavity of the diversion well body 1; overflow port 4 is fixedly connected to the outside of the diversion well body 1.

[0042] Adjustment component 5, there are two sets of adjustment components 5 facing opposite directions, the two sets of adjustment components 5 are respectively installed inside the flow restriction port 3 and the overflow port 4;

[0043] The regulating component 5 includes a baffle plate 51, and an regulating plate 52 is rotatably connected to one side of the baffle plate 51. Both the baffle plate 51 and the regulating plate 52 are semi-circular.

[0044] The above scheme is adopted: specifically by Figure 2 It can be seen that the positions of inlet 2 and flow restriction outlet 3 are horizontally distributed, and their central axes are on the same horizontal line. This layout can ensure the smoothness and directionality of water flow. At the same time, the angles of inlet 2 and flow restriction outlet 3 can be set arbitrarily and are not limited to symmetrical arrangement. They can be flexibly adjusted according to the specific working conditions of the actual project site.

[0045] Specifically by Figure 2As can be seen, the overflow outlet 4 is horizontally arranged with the inlet 2 and the flow restriction outlet 3 vertically distributed. At the same time, the overflow outlet 4 can also be flexibly adjusted according to the specific needs of the project site. For example, the overflow outlet 4 can be set above the inlet 2 and the flow restriction outlet 3 to adapt to different working conditions.

[0046] like Figures 3 to 6 As shown, two baffles 51 are fixedly connected inside the flow limiting port 3 and the overflow port 4, respectively. The side of the baffle 51 away from the regulating plate 52 is arc-shaped and flush with the arc surface of the inner wall of the diversion well body 1. Several slots 53 are opened in a ring on one side of the baffle 51. A threaded rod 54 is threadedly connected to the bottom end of the regulating plate 52 away from the baffle 51. A stop block 55 is fixedly connected to one end of the threaded rod 54. A spring 56 is sleeved on the outside of the threaded rod 54. A ball 57 is movably connected inside the regulating plate 52. The two ends of the spring 56 are fixedly connected to the ball 57 and the inner wall of the regulating plate 52, respectively.

[0047] The above solution is adopted as follows: the arc surface of one side of the baffle plate 51 is flush with the inner wall of the diversion well body 1, thereby avoiding the generation of vortex dead zones when the water flows inside the diversion well body 1, reducing the deposition of debris on the wall surface. At the same time, the annularly distributed grooves 53, together with the elastic telescopic structure of the ball 57 and the spring 56, provide multiple positioning positions for the angle adjustment of the regulating plate 52, making it convenient for personnel to divert the flow. Finally, through the threaded engagement design of the threaded rod 54 and the stop block 55, rigid locking can be achieved after the regulating plate 52 is positioned, ensuring the stability of the adjustment angle and preventing the angle of the regulating plate 52 from shifting due to water flow impact during operation, thereby ensuring the stability of the flow area of ​​the flow limiting port 3 and the overflow port 4.

[0048] During the rotation of the adjusting plate 52, the ball 57 is contracted into the interior of the adjusting plate 52 by external force. When the adjusting plate 52 rotates to the predetermined angle, the ball 57 will be inserted into the corresponding slot 53 on the baffle plate 51 under the elastic force of the spring 56, and make a clear clicking sound, thus feeding back to the operator that the positioning is in place.

[0049] Finally, the operator rotates the threaded rod 54 in the opposite direction, thereby moving the stop block 55 towards the ball 57 and pressing it against it, thereby fixing the position of the ball 57 in the slot 53, thereby fixing the angle of the adjusting plate 52 after rotation, and thus setting the effective flow area of ​​the flow limiting port 3. Finally, the same adjustment method is used to adjust the adjusting plate 52 in the overflow port 4 in the opposite direction to adapt to the differentiated flow diversion requirements of flow limiting and overflow, and to achieve the preset flow distribution ratio, such as four-six water, three-seven water, or two-eight water.

[0050] In the initial rainwater stage, the initial runoff volume is small and the pollution concentration is high. The runoff sewage is introduced into the hollow cavity of the diversion well body 1 through the inlet 2. Since the flow restriction port 3 and the inlet 2 are horizontally symmetrically distributed, the water flow can be guided to form a stable lateral flow path in the cavity. Relying on the gravity flow characteristic of water flowing downhill, the highly polluted initial rainwater preferentially gathers and flows out of the flow restriction port 3 at the bottom and is directly introduced into the subsequent collection and treatment system for purification treatment, thereby achieving the interception of the initial highly polluted rainwater. In this stage, since the lower half of the overflow port 4 is blocked by the baffle plate 51, and the sewage has not reached the predetermined liquid level, it is ensured that all the initial rainwater enters the treatment stage through the flow restriction port 3, thus avoiding the spread of pollution.

[0051] As rainfall gradually increases and runoff continues to increase, when the flow restriction port 3 reaches full flow, the liquid level in the diversion well body 1 begins to rise gradually. When the liquid level rises to the upper half of the overflow port 4, it enters the mid-to-late stage of rainwater overflow. At this time, the mid-to-late stage rainwater, whose pollution concentration has been significantly reduced, is no longer restricted to flowing out from the flow restriction port 3, but flows out in large quantities through the overflow port 4, which is perpendicular to the inlet 2 and the flow restriction port 3, and is directly discharged into the rainwater pipe network. The pre-set orifice ratio of the flow restriction port 3 and the overflow port 4 can control the flow distribution of the two channels, minimize the impact load of the initial rainwater on the treatment system, and at the same time avoid the mid-to-late stage rainwater from disturbing the initial rainwater, thus ensuring the diversion accuracy.

[0052] Throughout the operation, the inclined guide surfaces at the outlets of flow restriction port 3 and overflow port 4 can guide the water flow to form a spiral vortex shape. Utilizing the throttling effect of water, the centrifugal force generated by the vortex gathers impurities in the water at the center of the flow and carries them out quickly. At the same time, the high-speed rotating water flow continuously washes the inner wall of the outlet, effectively reducing the deposition of impurities, avoiding outlet blockage, and ensuring the long-term stable operation of the device.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for limiting and overflowing storm runoff and resisting impact, comprising a diversion well body (1), characterized in that: It also includes: Inlet (2), the inlet (2) is located on one side of the diversion well body (1) and is used to introduce runoff sewage; The flow restriction port (3) is located on the other side of the diversion well body (1) and is horizontally distributed with the inlet (2) to ensure that the water flow forms a transverse flow path in the cavity of the diversion well body (1). Overflow port (4), the overflow port (4) is fixedly connected to the outside of the diversion well body (1); Adjustment component (5), the adjustment component (5) is provided in two sets and faces opposite each other, the two sets of adjustment components (5) are respectively installed inside the flow restriction port (3) and the overflow port (4); The regulating component (5) includes a baffle plate (51), and an regulating plate (52) is rotatably connected to one side of the baffle plate (51). Both the baffle plate (51) and the regulating plate (52) are semi-circular.

2. The storm runoff limiting and overflow anti-impact device according to claim 1, characterized in that: The two baffles (51) are fixedly connected inside the flow limiting port (3) and the overflow port (4) respectively. The side of the baffle (51) away from the regulating plate (52) is arc-shaped and flush with the inner arc surface of the diversion well body (1).

3. The storm runoff limiting and overflow anti-impact device according to claim 1, characterized in that: The baffle (51) has several slots (53) circumferentially formed on one side. The bottom end of the adjusting plate (52) away from the baffle (51) is threaded with a threaded rod (54). One end of the threaded rod (54) is fixedly connected with a stop block (55).

4. The storm runoff flow limiting and overflow anti-impact device according to claim 3, characterized in that: A spring (56) is sleeved on the outside of the threaded rod (54), and a ball (57) is movably connected inside the adjusting plate (52). The two ends of the spring (56) are fixedly connected to the ball (57) and the inner wall of the adjusting plate (52), respectively.

5. The storm runoff limiting and overflow anti-impact device according to claim 4, characterized in that: The sphere (57) penetrates the side wall of the adjusting plate (52) and is inserted into the inside of the slot (53). The diameter of the slot (53) is the same as the diameter of the sphere (57). The inner wall of the adjusting plate (52) is provided with a cylindrical groove for limiting the sphere (57).

6. The storm runoff flow limiting and overflow anti-impact device according to claim 3, characterized in that: One side of the stop (55) is curved, and the curved surface is in contact with the outer surface of the sphere (57). The curved surface of the stop (55) abuts against the sphere (57).

7. The storm runoff limiting and overflow anti-impact device according to claim 1, characterized in that: The diversion well body (1) is an integrated structure with a hollow interior, and the top of the diversion well body (1) is provided with an installation platform for placing the well cover.

8. The storm runoff limiting and overflow anti-impact device according to claim 1, characterized in that: The outlets of the flow restrictor (3) and the overflow outlet (4) are both inclined guide surfaces, which are used to guide the water flow out in a spiral vortex shape.

9. A method for controlling runoff non-point source pollution, applied to the storm runoff flow limiting and overflow anti-impact device as described in any one of claims 1-8, characterized in that: The steps are as follows: S1. Before installation, calculate based on the catchment area, adjust the rotation angle of the adjustment plate (52) inside the flow restriction port (3) and overflow port (4), and set the preset water distribution ratio by locking the angle after the adjustment plate (52) is rotated. S2. Subsequently, the runoff sewage is introduced into the diversion well body (1) through the inlet (2), and flows out from the inlet (2) by gravity flow, and is introduced into the treatment system to intercept highly polluted rainwater. S3. Finally, as the flow rate continues to increase, the liquid level rises after the flow limit outlet (3) is full. In the middle and late stages, rainwater flows out from the overflow outlet and enters the rainwater pipe network for discharge.

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