An initial rainwater collection system and rainwater interception and discharge control method

Abstract

The present invention relates to the technical field of municipal sewer sewage discharge, and discloses an initial rainwater collection system and a rainwater interception and discharge control method. The initial rainwater collection system comprises: a collection device, a drainage pipe, a sewage gate and a rainwater gate arranged in the sewer channel of the water collection area. The collection device comprises: a water collecting box, a cover mechanism, an adjustment mechanism and a detection mechanism. The cover mechanism is arranged at the opening of the water collecting box and can close or open the opening. The water collecting box is connected to the sewer channel through the adjustment mechanism. The adjustment mechanism can adjust the direction of the opening. The detection mechanism arranged in the water collecting box can detect the water quantity / water quality information in the water collecting box. The sewer channel is connected to the drainage pipe, and a sewage gate and a rainwater gate are arranged at the drainage end of the drainage pipe. The initial rainfall collection device can collect the initial rainwater and discharge it into the sewage treatment plant for treatment after the rainfall ends. The initial rainwater and the middle and late rainwater will not mix, will not affect the sewage concentration of the sewage treatment plant, and will not increase the treatment load.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal sewer pipe sewage discharge, and in particular to an initial rainwater collection system and a rainwater interception and discharge control method. Background Art

[0002] Municipal drainage systems often use two methods for discharge: combined sewerage and separate sewerage. Combined sewerage means that rainwater and sewage share the same pipe system, are mixed and transported to sewage treatment plants for treatment, and then discharged into natural water bodies. Separate sewerage separates rainwater and sewage, transporting each through independent pipe systems. Sewage is transported to sewage treatment plants, while rainwater is discharged directly into natural water bodies. Compared with combined sewerage, separate sewerage has the advantages of promoting the improvement of sewage treatment plant quality and efficiency and avoiding combined sewer overflow pollution. However, the collection and treatment of initial rainwater carrying high concentrations of pollutants has also become an important issue facing separate sewerage drainage systems.

[0003] Currently, there are two most common methods for collecting and controlling initial rainwater. One method is to collect initial rainwater from the water collection area into a regulating reservoir, and then discharge the water in the regulating reservoir into the sewage pipe and finally into the sewage treatment plant. However, different rainwater outlets are at different distances from the regulating reservoir, so the time it takes for initial rainwater from different rainwater outlets to reach the regulating reservoir varies. The initial rainwater at the far end may mix with the intermediate and late rainwater at the near end, resulting in low pollutant concentrations, which ultimately affects the influent concentration and treatment effect of the sewage treatment plant, and the construction cost is high. Another method is to set up an interception well at the end of the municipal rainwater main outlet. The natural water outlet end of the interception well is equipped with a fixed weir gate or an intelligent interception gate to control the initial rainwater and sunny weather sewage to be intercepted and enter the sewage pipe instead of being discharged directly into the surface water. However, as the rainfall continues, a large amount of relatively clean remote or intermediate and late rainwater will also enter the sewage pipe and be transported to the sewage treatment plant for treatment. This will also cause the influent concentration of the sewage treatment plant to decrease, affecting the treatment effect and increasing the operating burden of the sewage treatment plant. Summary of the Invention

[0004] In view of this, the present invention provides an initial rainwater collection system and a rainwater interception and discharge control method to solve the problem that the existing initial rainwater interception control facilities and methods lead to a decrease in the influent concentration of the sewage treatment plant, affecting the sewage treatment effect, and increasing the operating load of the sewage treatment plant.

[0005] In a first aspect, the present invention provides an initial rainwater collection system, comprising:

[0006] A collecting device, wherein each drain channel in the water collection area is provided with a collecting device, the collecting device comprising: a water collecting box, a cover mechanism, an adjusting mechanism and a detecting mechanism, the water collecting box having a water collecting cavity with an opening at one end, the cover mechanism being provided at the opening, the cover mechanism having a covering state for closing the opening and an opening-closing state for opening the opening, the water collecting box being connected to the top end of the drain channel via the adjusting mechanism, the adjusting mechanism being suitable for adjusting the direction of the opening, the detecting mechanism being provided in the water collecting cavity for detecting water quantity information or water quality information in the water collecting box;

[0007] The collecting device has a water collecting state, a flow-through state, and a drainage state. In the water collecting state, the opening of the water collecting box faces the top of the sewer channel, and the cover mechanism is in an open and closed state to collect initial rainwater; in the flow-through state, the opening of the water collecting box faces the side wall of the sewer channel, and the cover mechanism is in a covered state; in the drainage state, the opening of the water collecting box faces the bottom end or obliquely downward of the sewer channel, and the cover mechanism is in an open and closed state to discharge the initial rainwater in the water collecting box;

[0008] a drainage pipe, the sewer channel being in communication with the drainage pipe;

[0009] a sewage gate, the sewage gate being arranged at the drainage end of the drainage pipe, the sewage gate having a first closed state and a first open state connecting the drainage pipe to the sewage treatment plant;

[0010] A rainwater gate is provided at the drainage end of the drainage pipe, and the rainwater gate has a second closed state and a second open state for connecting the drainage pipe with a natural water body.

[0011] Beneficial effects

[0012] During the initial rainfall, rainwater with higher pollutant concentrations is collected and stored using collection devices. During the middle and late stages of a rainfall, cleaner rainwater flows directly from the sewer channel into the drainage pipes, where it is then discharged into natural water bodies through stormwater gates. After the rainfall ends, the initial rainwater is discharged back into the drainage pipes and then, through sewage gates, into the sewage treatment plant for treatment. This prevents the mixing of the higher pollutant concentrations of the initial rainwater and the lower concentrations of the middle and late rainwater, thereby preventing the concentration of wastewater entering the sewage treatment plant and increasing the treatment load.

[0013] In an optional embodiment, the adjustment mechanism includes two telescopic rods, which are respectively arranged on both sides of the water collecting tank, and one end of the telescopic rod is hinged to the water collecting tank, and the other end is hinged to the top of the sewer channel.

[0014] Beneficial effects

[0015] The two telescopic rods can be adjusted to rotate the water collection box to change its position. When it is necessary to collect initial rainwater, the opening of the water collection box is facing upwards for easy collection. When it is not necessary to collect rainwater, the opening of the water collection box is facing the side wall of the sewer channel to not affect the flow of rainwater into the drainage pipe.

[0016] In an optional embodiment, the cover mechanism includes: two opposing cover plates and two sets of flipping mechanisms, the two sets of flipping mechanisms are relatively arranged on the water collecting tank, the two cover plates are respectively connected to the two sets of flipping mechanisms, and the flipping mechanisms are suitable for driving the cover plates to open and close.

[0017] In an optional embodiment, the detection mechanism includes: a liquid level sensor or a water quality sensor, and the liquid level sensor or the water quality sensor is arranged inside the water collecting chamber.

[0018] Beneficial effects

[0019] The amount of water in the water collecting chamber is detected by a liquid level sensor, and the cover mechanism and the regulating mechanism are controlled to perform corresponding actions according to the amount of water.

[0020] In an optional embodiment, the initial rainwater collection system further includes a control device, which is electrically connected to the collection device, the sewage gate and the rainwater gate.

[0021] Beneficial effects

[0022] By setting up control equipment, the system can be automatically and intelligently controlled, and refined control, namely, calculation of non-point source pollution load, can be achieved based on the spatiotemporal distribution characteristics of initial rainwater pollutants on the underlying surface in different regions.

[0023] In a second aspect, the present invention further provides a rainwater interception and discharge control method, which is applied to an initial rainwater collection system, comprising:

[0024] At the beginning of rainfall, the water collection tank is in the water collection state to collect the initial rainwater;

[0025] In the middle and late stages of rainfall, the water collection tank is in an overflow state, and rainwater is discharged to natural water bodies through sewer channels, drainage pipes, and rainwater gates;

[0026] After the rainfall ends, the water collecting tank is in a drainage state to discharge the collected initial rainwater, and the initial rainwater is discharged to the sewage treatment plant through the sewer channel, the drainage pipe, and the sewage gate.

[0027] Beneficial effects

[0028] Because the rainwater interception and discharge control method is applied to the initial rainwater collection system and has the same effect as the initial rainwater collection system, it will not be described in detail here.

[0029] In an optional embodiment, at the initial stage of rainfall, the water collecting tank is in a water collecting state and collects the initial rainwater:

[0030] The regulating mechanism controls the opening of the water collecting tank to face the top of the sewer channel;

[0031] The cover mechanism is in an open or closed state;

[0032] Initial rainwater enters the water collecting tank from the top of the sewer channel and is stored.

[0033] In an optional embodiment, in the middle and late stages of rainfall, the water collecting tank is in an overflow state, and rainwater is discharged to a natural water body through a sewer channel, a drainage pipe, and a rainwater gate:

[0034] The stormwater gate is in the second open state, and the sewage gate is in the first closed state;

[0035] The cover mechanism is in a closed state;

[0036] The regulating mechanism controls the opening of the water collecting box to face the side wall of the sewer channel;

[0037] Rainwater enters the sewer channel from the ground, then flows into the drainage pipe, and then is discharged to the natural water body through the rainwater gate.

[0038] In an optional embodiment, after the rainfall ends, the water collecting tank is in a drainage state to discharge the collected initial rainwater, and the initial rainwater is discharged to the sewage treatment plant through the sewer channel, the drainage pipe, and the sewage gate:

[0039] The stormwater gate is in the second closed state, and the sewage gate is in the first open state;

[0040] The regulating mechanism controls the opening of the water collecting box to face the bottom end or obliquely downward of the sewer channel;

[0041] The cover mechanism is in an open or closed state;

[0042] The initial rainwater stored in the water collecting tank flows from the sewer channel into the drainage pipe, and is then discharged into the sewage treatment plant through the sewage gate.

[0043] In an optional embodiment, the rainwater interception and discharge control method further includes:

[0044] During the non-rainfall period, the rainwater gate is in the second closed state, the sewage gate is in the first open state, the water collecting tank is in an overflow state, and the sewage is discharged to the sewage treatment plant through the sewer channel, the drainage pipe, and the sewage gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 A schematic diagram of an initial rainwater collection system according to the present invention when the collection device is in a water collection state;

[0047] Figure 2 A schematic diagram of an initial rainwater collection system according to the present invention when the collection device is in an overflow state;

[0048] Figure 3 This is a schematic diagram of a collection device in an initial rainwater collection system of the present invention.

[0049] Description of reference numerals:

[0050] 1. Collection device, 11. Water collecting tank, 12. Cover plate, 13. Telescopic rod, 14. Liquid level sensor;

[0051] 2. Sewer channel, 21. Manhole cover;

[0052] 3. Drainage pipes;

[0053] 4. Sewage gate;

[0054] 5. Stormwater gate;

[0055] 6. Control equipment. DETAILED DESCRIPTION

[0056] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0057] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0059] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0060] The following combination Figures 1 to 3 , describing embodiments of the present invention.

[0061] According to an embodiment of the present invention, on the one hand, an initial rainwater collection system is provided. The initial rainwater collection system includes: a collection device 1, a drainage pipe 3, a sewage gate 4 and a rainwater gate 5. A collection device 1 is provided in each sewer channel 2 in the water collection area, and the collection device 1 includes: a water collecting tank 11, a cover mechanism, an adjustment mechanism and a detection mechanism. The water collecting tank 11 has a water collecting cavity with an opening at one end, and the cover mechanism is provided at the opening. The cover mechanism has a covering state for closing the opening and an opening and closing state for opening the opening. The water collecting tank 11 is connected to the top of the sewer channel 2 through an adjustment mechanism. The adjustment mechanism is suitable for adjusting the direction of the opening. A detection mechanism is provided in the water collecting cavity for detecting water quantity information or water quality information in the water collecting tank 11. The collection device 1 has three states: a water collection state, a flow-through state, and a drainage state. In the water collection state, the opening of the water collection tank 11 faces the top of the sewer channel 2, and the cover mechanism is in an open state to collect initial rainwater. In the flow-through state, the opening of the water collection tank 11 faces the side wall of the sewer channel 2, and the cover mechanism is in a closed state. In the drainage state, the opening of the water collection tank 11 faces the bottom end or obliquely downward of the sewer channel, and the cover mechanism is in an open state to discharge initial rainwater from the water collection tank 11. The sewer channel 2 is connected to the drainage pipe 3. A sewage gate 4 is provided at the drainage end of the drainage pipe 3. The sewage gate 4 has a first closed state and a first open state that connects the drainage pipe 3 to the sewage treatment plant. A rainwater gate 5 is provided at the drainage end of the drainage pipe 3. The rainwater gate 5 has a second closed state and a second open state that connects the drainage pipe 3 to a natural body of water.

[0062] This initial rainwater collection system is particularly suitable for deployment in municipal drainage networks, for the separate drainage of urban rainwater and sewage. Multiple sewer channels 2 are selectively arranged within a particular collection area, with manhole covers 21 or rainwater grates installed at the top of each channel. These channels serve as a protective barrier to prevent pedestrians from falling into the channels, and also as a preliminary filter to remove larger waste materials and prevent them from entering and causing blockage.

[0063] A collecting device 1 is provided in the sewer channel 2, and its main function is to collect initial rainwater with a high concentration of pollutants. Specifically, the collecting device 1 includes: a water collecting tank 11, a cover mechanism, an adjustment mechanism and a detection mechanism. The shape of the water collecting tank 11 is similar to that of the sewer channel 2. In this embodiment, the water collecting tank 11 is cylindrical in shape and has a cylindrical water collecting cavity inside. The cross-sectional area of the water collecting tank 11 is slightly smaller than the cross-sectional area of the sewer channel 2. The depth of the water collecting tank is determined according to the amount of initial rainwater that needs to be collected. For example, if n water collecting tanks are provided in a water collecting area of area s, and m millimeters of initial rainwater needs to be collected, the average collection amount of the water collecting tank 11 in the water collecting area is The specific collection volume is adjusted and determined according to the water collection area, slope characteristics, functional zoning, etc. of the installation point of each water collecting tank. The material of the water collecting tank 11 should be corrosion-resistant stainless steel or plastic, etc. The opening of the water collecting tank 11 is provided with a cover mechanism, and the cover mechanism is generally electrically controlled to realize opening and closing, that is, corresponding to the open and closed state and the closed state. In the open and closed state, the initial rainwater can be collected into the water collecting chamber. In the closed state, the water collecting chamber will no longer continue to collect water, and it must be kept sealed at this time to prevent the water in the water collecting chamber from leaking. The water collecting tank 11 is connected to the top of the sewer channel 2 through an adjusting mechanism. It can be connected to the manhole cover 21 or the rainwater grate, or it can be connected to the side wall of the sewer channel 2. The adjusting mechanism can not only fix the water collecting tank 11, but also rotate the water collecting tank 11 to adjust the position of the water collecting tank 11. When collecting the initial rainwater, the adjusting mechanism rotates the water collecting tank 11 so that the opening faces upward. When rainwater collection is no longer needed, the regulating mechanism rotates water collection tank 11 so that its opening faces the sidewall of sewer channel 2, for example, aligning the axis of water collection tank 11 perpendicularly to the axis of sewer channel 2. To drain the initial rainwater collected in water collection tank 11, the regulating mechanism rotates water collection tank 11 so that its opening faces the bottom of sewer channel 2 or diagonally downward. A detection device is also installed on the inner wall of water collection tank 11 to detect the amount and quality of the initial rainwater in the water collection chamber. This information can be used to adjust the state of collection device 1.

[0064] Under the coordinated cooperation of the cover mechanism, the regulating mechanism, and the detection mechanism with the water collection tank 11, the collection device 1 has three states: a water collection state, a flow state, and a drainage state. In the water collection state, initial rainwater is collected. At this time, the opening of the water collection tank 11 faces upward, and the cover mechanism is in an open and closed state, leaving the opening open. Initial rainwater can flow directly into the water collection tank 11 from the manhole cover 21, and the detection mechanism obtains water quantity or water quality information in real time. When it is determined that a sufficient amount of initial rainwater has been collected or that the rainwater entering the water collection tank 11 is relatively clean, it is determined that the rainfall has entered the middle and late stages. The collection device 1 can then transition from the water collection state to the flow state, and the cover mechanism is in a closed state, closing the opening to prevent leakage of the initial rainwater. The regulating mechanism then rotates the water collection tank 11 so that its opening faces the side wall of the sewer channel 2. Mid- and late-stage rainwater flows directly down the sewer channel 2, and the water collection tank 11 does not cause excessive water resistance. After the rainfall ends, the collecting device 1 changes from the overflow state to the drainage state, and discharges the initial rainwater collected in the water collecting tank 11.

[0065] The drainage pipe 3 is generally buried underground, and the bottom end of the sewer channel 2 is connected to the drainage pipe 3, which can realize the confluence of water from each sewer channel 2. A sewage gate 4 and a rainwater gate 5 are provided at the drainage end of the sewer channel 2 to realize the separation of rainwater and sewage. The sewage gate 4 and the rainwater gate 5 can both be opened and closed, and their driving mode can be electric drive or hydraulic drive. When the sewage gate 4 is opened, the water in the drainage pipe 3 flows to the sewage treatment plant, so at this time, the water flowing in the drainage pipe 3 is generally sewage. When the rainwater gate 5 is opened, the water in the drainage pipe 3 flows to the natural water body, so at this time, the water flowing in the drainage pipe 3 is generally cleaner water, and discharge into the natural water body will not cause pollution.

[0066] With the initial rainwater collection system, during the initial rainfall, the collection device 1 can be placed in a water-collecting state to collect the high-pollutant concentration initial rainwater. During the middle and late stages of rainfall, the collection device 1 can be placed in a flow-through state, allowing rainwater to be discharged directly through the rainwater gate 5 into a nearby natural body of water. When the rainfall ends, the water collection tank 11 is opened (with the lid mechanism in an open or closed state) to release the stored initial rainwater, which is then discharged through the sewage gate 4 into the sewage treatment plant for treatment. This prevents the high-pollutant concentration initial rainwater and the cleaner middle and late stages rainwater from mixing, thereby preventing the sewage treatment plant from experiencing a lower pollutant concentration in its influent. Ultimately, this results in better sewage treatment and a lower operating load on the sewage treatment plant.

[0067] In one embodiment, the adjustment mechanism includes two telescopic rods 13 , which are respectively arranged on both sides of the water collecting tank 11 , and one end of the telescopic rod 13 is hinged to the water collecting tank 11 , and the other end is hinged to the top of the sewer channel 2 .

[0068] The telescopic rod 13 is electrically driven, with one end connected to the manhole cover 21 and the other end connected to the upper end of the water collection tank 11. The two telescopic rods 13 can extend and retract asynchronously. When one telescopic rod 13 extends while the other telescopic rod 13 shortens or remains stationary, the water collection tank 11 can be rotated, for example, from an upwardly facing position to a position with the opening facing the side wall of the sewer channel 2.

[0069] In other embodiments, the adjustment mechanism may also be in the form of a connecting rod and a rotating shaft, with one end of the two connecting rods connected to the manhole cover 21 and the other end connected to the end of the rotating shaft. A driving member is then provided to drive the rotating shaft to rotate, thereby causing the entire water collection box 11 to rotate with the rotating shaft to achieve adjustment of the opening direction.

[0070] In other embodiments, the adjustment mechanism may also be in other structural forms, as long as the water collecting box 11 can be rotated. This embodiment does not impose any specific restrictions on the adjustment mechanism.

[0071] In one embodiment, the cover mechanism includes: two opposing cover plates 12 and two sets of flipping mechanisms, the two sets of flipping mechanisms are relatively arranged on the water collecting box 11, the two cover plates 12 are respectively connected to the two sets of flipping mechanisms, and the flipping mechanisms are suitable for driving the cover plates 12 to open and close.

[0072] The water collection tank 11 is cylindrical, while the cover 12 is semicircular, allowing the two covers 12 to cover the opening. The cover 12 is pivotally connected to the top of the water collection tank 11 via a shaft. In this embodiment, the pivoting connection is located on either side of the water collection tank 11. A tilting mechanism is provided on the top of the water collection tank 11. Specifically, a motor provides the rotational force, which is transmitted through a gear reducer to tilt the cover 12 open or close.

[0073] In other embodiments, the number of cover plates 12 can be one, three, or the like. For example, a single cover plate 12 can be positioned at the opening, with a central pivot disposed between the ends of the pivot pivotally attached to the water collection tank 11. The opening of the water collection tank 11 can be opened and closed, as well as its size, by adjusting the tilt angle of the cover plate 12. The cover plate 12 can also be manipulated in other ways, such as rotational or telescopic. For example, the cover plate 12 can be rotated in a plane about its connection point with the water collection tank 11 to open or close the opening.

[0074] There are many kinds of cover mechanisms similar to this one that can control the opening and closing of the water collecting box 11. Correspondingly, there are many ways to open the cover mechanism in terms of shape, quantity, mechanical transmission structure, and rotation connection position. This embodiment does not list them one by one and does not impose specific restrictions.

[0075] In one embodiment, the detection mechanism includes: a liquid level sensor 14 or a water quality sensor, and the liquid level sensor 14 or the water quality sensor is disposed inside the water collecting chamber.

[0076] In this embodiment, a liquid level sensor 14 is installed within the water collection chamber. Liquid level sensor 14 can be a liquid level gauge, which directly measures the water level in the water collection chamber and thereby provides information on the water volume. Furthermore, the water volume collected by the water collection tank 11 can be adjusted based on the spatiotemporal distribution of initial rainwater pollutants at different installation locations. In other embodiments, the liquid level gauge can be replaced by a weight meter.

[0077] In other embodiments, water quality sensors may be installed within the water collection chamber. For example, online COD (chemical oxygen demand), ammonia nitrogen, SS (suspended solids) and other water quality sensors may be installed within the water collection tank 11 to achieve automated, intelligent, and refined control of the system. Furthermore, the non-point source pollution load in the area can be more accurately calculated, assisting in the comprehensive management of the urban water environment.

[0078] In one embodiment, the initial rainwater collection system further includes a control device 6 , which is electrically connected to the collection device 1 , the sewage gate 4 and the rainwater gate 5 .

[0079] The control device 6 can be a master control room located on the ground, which automatically controls the collection device 1, sewage gate 4, and rainwater gate 5 via a programmable logic controller (PLC). The control device 6 can rationally regulate the cover mechanism, regulating mechanism, sewage gate 4, and rainwater gate 5 based on local rainfall conditions (such as rainfall duration and amount) and the detection information from the liquid level sensor 14. For example, during the initial stages of rainfall, the cover mechanism and regulating mechanism can be coordinated to place the collection device 1 in a water-collecting state to collect initial rainwater. When the liquid level sensor 14 detects that the water level has reached a predetermined value, the collection device 1 is controlled to switch to a flow-through state, allowing rainwater to be discharged directly through the rainwater gate 5. Once the rainfall has completely ceased, the opening of the collection device 1 is reopened, allowing the initial rainwater to be discharged through the sewage gate 4.

[0080] The control device 6 can also fine-tune the amount of water collected by each collection device 1. For example, the amount of initial rainwater collected can be adjusted based on the rainfall interval. When the rainfall interval is long, it is assumed that the initial rainwater carries more pollutants, and the amount of initial rainwater collected can be appropriately increased. For convenient adjustment, multiple levels of water volume control can be set based on the duration of the rainfall interval. In addition, the water volume can be adjusted based on the location of each collection device 1, such as the underlying surface and slope of the location.

[0081] In other embodiments, if a water quality sensor is provided, the pollutant concentration of rainwater entering the water collection tank 11 can be monitored in real time through the water quality sensor. When it is detected that the pollutant concentration becomes lower and is relatively cleaner than the initial rainfall, it can be determined that the rainfall has entered the middle and late stages from the early stages, and the state of the collection device 1 can be adjusted accordingly.

[0082] According to an embodiment of the present invention, on the other hand, a rainwater interception and discharge control method is also provided, which is applied to an initial rainwater collection system. The initial rainwater collection system has the same structure as the initial rainwater collection system in the above embodiment and will not be described in detail.

[0083] Stormwater interception and discharge control methods include:

[0084] (1) At the initial stage of rainfall, the water collecting tank 11 is in a water collecting state to collect the initial rainwater.

[0085] At the beginning of rainfall, rainwater forms runoff on the surface and carries pollutants into the sewer channel 2. Since the concentration of pollutants in the rainwater at this time is high, it is collected by the water collection tank 11 so as to be discharged into the sewage treatment plant for treatment.

[0086] Specifically, the regulating mechanism controls the opening of the water collecting box 11 toward the top of the sewer channel 2;

[0087] The control device 6 sends out instructions to control the regulating mechanism, and through the coordinated cooperation of the two telescopic rods 13 , the opening of the water collecting box 11 is directed upward, facing the inside of the sewer channel 2 .

[0088] The cover mechanism is in an open or closed state;

[0089] At the same time, the control device 6 sends a command to control the cover body mechanism to open, so that the opening is open, and the initial rainwater will directly flow into the water collection box 11. The above two steps can also be performed during the non-raining period, so that the collection work can be carried out as soon as it rains.

[0090] Initial rainwater enters the water collecting tank 11 from the top of the sewer channel 2 and is stored.

[0091] Initially, rainwater continues to flow into the water collection tank 11 for storage. In this embodiment, the liquid level is detected by the liquid level sensor 14, and the water volume information is sent to the control device 6. In the initial stage of rainfall, most of the rainwater enters the water collection tank 11, and the sewage gate 4 and the rainwater gate 5 are both in the closed state.

[0092] In other embodiments, the water quality sensor may also monitor the quality of rainwater entering the water collection tank 11 in real time.

[0093] (2) In the middle and late stages of rainfall, the water collection tank 11 is in an overflow state, and rainwater is discharged to natural water bodies through the sewer channel 2, drainage pipe 3, and rainwater gate 5;

[0094] In this embodiment, when the liquid level sensor 14 detects that the water volume has reached a preset value, the initial rainwater collection is complete and the mid- to late-stage rainfall period has begun. After the liquid level sensor 14 feeds the water volume information back to the control device 6, the control device 6 issues a command to control the water collection tank 11 to switch from a water collection state to a flow-through state, no longer collecting rainwater. Since the rainwater is now relatively clean, it can be directly discharged into natural water bodies.

[0095] In other embodiments, when the water quality sensor detects that the rainwater quality entering the water collection tank 11 reaches a preset qualified value through online COD (chemical oxygen demand in water), ammonia nitrogen, SS (suspended solids) and other water quality probes, it can also be determined that the rainfall has entered the middle and late stages.

[0096] Specifically, the rainwater gate 5 is in the second open state, and the sewage gate 4 is in the first closed state;

[0097] The opening of the rainwater gate 5 means that the drainage pipe 3 is connected to the natural water body, but the rainwater is relatively clean at this time and therefore does not need to be discharged into the sewage treatment plant, so the sewage gate 4 remains closed.

[0098] The cover mechanism is in a closed state;

[0099] The two cover plates 12 cover the opening, and the water collecting box 11 is in a sealed state, ensuring that the collected initial rainwater will not leak.

[0100] The regulating mechanism controls the opening of the water collecting box 11 toward the side wall of the sewer channel 2;

[0101] The two telescopic rods 13 are adjusted, one of which is extended and the other is shortened, and the two cooperate to rotate the water collecting box 11 so that the opening of the water collecting box 11 faces the side wall of the sewer channel 2, and at this time the water collecting box 11 is close to the side wall of the sewer channel 2, which will not cause significant interference to the rainwater flow in the sewer channel 2.

[0102] Rainwater enters the sewer channel 2 from the ground, then flows into the drainage pipe 3, and then flows into the natural water body through the rainwater gate 5.

[0103] The rainwater from each sewer channel 2 converges in the drainage pipe 3 and then is discharged to the natural water body.

[0104] (3) After the rainfall ends, the water collection tank 11 is in a drainage state, and the collected initial rainwater is discharged to the sewage treatment plant through the sewer channel 2, the drainage pipe 3, and the sewage gate 4.

[0105] After the rain stops, the initial rainwater needs to be discharged into the sewage treatment plant for treatment, and the pollutants it carries must undergo a series of purification treatments before it can be discharged.

[0106] Specifically, the rainwater gate 5 is in the second closed state, and the sewage gate 4 is in the first open state;

[0107] Since initial rainwater with a high concentration of pollutants will be discharged at this time, it is necessary to close the rainwater gate 5 to prevent it from being discharged into natural water bodies and causing water pollution, and open the sewage gate 4 to discharge it into the sewage treatment plant.

[0108] The regulating mechanism controls the opening of the water collecting box 11 to face the bottom end or obliquely downward of the sewer channel 2;

[0109] The cover mechanism is in an open or closed state;

[0110] At this time, the opening of the water collecting box 11 faces obliquely downward or the bottom end of the sewer channel 2, and the initial rainwater can be discharged by directly opening the cover mechanism.

[0111] The initial rainwater stored in the water collecting tank 11 flows from the sewer channel 2 into the drainage pipe 3 and is then discharged into the sewage treatment plant through the sewage gate 4.

[0112] Initially, rainwater flows directly down the sewer channel 2, converges in the drainage pipe 3, and is then discharged to the sewage treatment plant.

[0113] (4) During the non-rainfall period, the rainwater gate 5 is in the second closed state, the sewage gate 4 is in the first open state, the water collection tank 11 is in the overflow state, and the sewage is discharged to the sewage treatment plant through the sewer channel 2, the drainage pipe 3, and the sewage gate 4.

[0114] When there is no rainfall, the sewage discharged into the sewer channel 2 is generally domestic sewage, so it cannot be discharged directly into natural water bodies, and needs to enter a sewage treatment plant for purification.

[0115] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An initial rainwater collection system, characterized in that: include: A collecting device (1), wherein each drain channel (2) in a water collection area is provided with a collecting device (1), the collecting device (1) comprising: a water collecting box (11), a cover mechanism, an adjusting mechanism and a detecting mechanism, the water collecting box (11) having a water collecting cavity with an opening at one end, the cover mechanism being provided at the opening, the cover mechanism having a covering state for closing the opening and an opening state for opening the opening, the water collecting box (11) being connected to the top end of the drain channel (2) via the adjusting mechanism, the adjusting mechanism being suitable for adjusting the direction of the opening, the detecting mechanism being provided in the water collecting cavity for detecting water quantity information or water quality information in the water collecting box (11); The collecting device (1) has a water collecting state, a flow-through state, and a drainage state. In the water collecting state, the opening of the water collecting box (11) faces the top of the sewer channel (2), and the cover body mechanism is in an open and closed state to collect initial rainwater; in the flow-through state, the opening of the water collecting box (11) faces the side wall of the sewer channel (2), and the cover body mechanism is in a closed state; in the drainage state, the opening of the water collecting box (11) faces the bottom end or obliquely downward of the sewer channel (2), and the cover body mechanism is in an open and closed state to discharge the initial rainwater in the water collecting box (11); A drainage pipe (3), wherein the sewer channel (2) is connected to the drainage pipe (3); A sewage gate (4), the sewage gate (4) being arranged at the drainage end of the drainage pipe (3), the sewage gate (4) having a first closed state and a first open state for connecting the drainage pipe (3) to the sewage treatment plant; A rainwater gate (5) is provided at the drainage end of the drainage pipe (3), and the rainwater gate (5) has a second closed state and a second open state for connecting the drainage pipe (3) with a natural water body.

2. The initial rainwater collection system according to claim 1, characterized in that: The regulating mechanism comprises two telescopic rods (13), the two telescopic rods (13) being respectively arranged on both sides of the water collecting box (11), and one end of the telescopic rod (13) being hinged to the water collecting box (11), and the other end being hinged to the top end of the sewer channel (2).

3. The initial rainwater collection system according to claim 1, characterized in that: The cover mechanism comprises: two opposing cover plates (12) and two groups of flipping mechanisms, the two groups of flipping mechanisms being arranged opposite to each other on the water collecting box (11), the two cover plates (12) being respectively connected to the two groups of flipping mechanisms, and the flipping mechanisms being suitable for driving the cover plates (12) to open and close.

4. The initial rainwater collection system according to claim 1, characterized in that: The detection mechanism comprises: a liquid level sensor (14) or a water quality sensor, and the liquid level sensor (14) or the water quality sensor is arranged inside the water collecting chamber.

5. The initial rainwater collection system according to any one of claims 1 to 4, characterized in that: It also includes a control device (6), which is electrically connected to the collection device (1), the sewage gate (4) and the rainwater gate (5).

6. A rainwater interception and discharge control method, applied to the initial rainwater collection system according to any one of claims 1 to 5, characterized in that: include: At the initial stage of rainfall, the water collection tank (11) is in a water collection state to collect the initial rainwater; In the middle and late stages of rainfall, the water collection tank (11) is in an overflow state, and rainwater is discharged to natural water bodies through the sewer channel (2), the drainage pipe (3), and the rainwater gate (5); After the rainfall ends, the water collection tank (11) is in a drainage state, discharging the collected initial rainwater, which is then discharged to the sewage treatment plant through the sewer channel (2), the drainage pipe (3), and the sewage gate (4).

7. The rainwater interception and discharge control method according to claim 6, characterized in that: At the initial stage of rainfall, the water collecting tank (11) is in a water collecting state and collects the initial rainwater. The regulating mechanism controls the opening of the water collecting box (11) to face the top end of the sewer channel (2); The cover mechanism is in an open or closed state; Initial rainwater enters the water collecting tank (11) from the top of the sewer channel (2) and is stored.

8. The rainwater interception and discharge control method according to claim 6, characterized in that: In the middle and late stages of rainfall, the water collecting tank (11) is in an overflow state, and rainwater is discharged to a natural water body through the sewer channel (2), the drainage pipe (3), and the rainwater gate (5): The rainwater gate (5) is in the second open state, and the sewage gate (4) is in the first closed state; The cover body mechanism is in a closed state; The regulating mechanism controls the opening of the water collecting box (11) toward the side wall of the sewer channel (2); Rainwater enters the sewer channel (2) from the ground, then flows into the drainage pipe (3), and then flows through the rainwater gate (5) to be discharged to the natural water body.

9. The rainwater interception and discharge control method according to claim 6, characterized in that: After the rainfall ends, the water collecting tank (11) is in a drainage state, and the collected initial rainwater is discharged. The initial rainwater is discharged to the sewage treatment plant through the sewer channel (2), the drainage pipe (3), and the sewage gate (4). The rainwater gate (5) is in the second closed state, and the sewage gate (4) is in the first open state; The regulating mechanism controls the opening of the water collecting box (11) to face the bottom end or obliquely downward of the sewer channel (2); The cover mechanism is in an open or closed state; The initial rainwater stored in the water collecting tank (11) flows from the sewer channel (2) into the drainage pipe (3), and then is discharged into the sewage treatment plant through the sewage gate (4).

10. The rainwater interception and discharge control method according to any one of claims 6 to 9, characterized in that: Also includes: During the non-rainfall period, the rainwater gate (5) is in the second closed state, the sewage gate (4) is in the first open state, the water collecting tank (11) is in the overflow state, the cover mechanism is in the closed state, and the sewage is discharged to the sewage treatment plant through the sewer channel (2), the drainage pipe (3), and the sewage gate (4).

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