Initial rainwater collecting system and rainwater intercepting and discharging control method

Abstract

The invention relates to the technical field of sewage discharge of municipal drainage pipes, and discloses an initial rainwater collection system and a rainwater closure discharge control method. The initial rainwater collection system comprises a collection device, a drainage pipeline, a sewage gate and a rainwater gate which are arranged in a sewer of a water collection area. The collecting device comprises a water collecting tank, a cover body mechanism, an adjusting mechanism and a detection mechanism, the cover body mechanism is arranged at an opening of the water collecting tank and can close or open the opening, the water collecting tank is connected with the sewer channel through the adjusting mechanism, the adjusting mechanism can adjust the orientation of the opening, and the detection mechanism arranged in the water collecting tank can detect water volume / water quality information in the water collecting tank. The sewer channel is communicated with the drainage pipeline, and a sewage gate and a rainwater gate are arranged at the drainage tail end of the drainage pipeline. The rainfall initial-stage collecting device can collect initial-stage rainwater, and the initial-stage rainwater is discharged into a sewage treatment plant to be treated after rainfall is finished. Initial rainwater and middle-later rainwater are not mixed, the sewage concentration of a sewage treatment plant is not affected, and the treatment load is not increased.

Description

Technical Field

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

[0002] In municipal drainage systems, two common methods are used for discharge: combined sewer and separate sewer systems. In the combined sewer system, rainwater and sewage share the same pipeline system, and after mixing, they are transported to a sewage treatment plant for treatment and then discharged into natural water bodies. In the separate sewer system, rainwater and sewage are separated and transported through independent pipeline systems. The sewage is transported to the sewage treatment plant, while the rainwater is directly discharged into natural water bodies. Compared with the combined sewer discharge method, the separate sewer discharge has advantages such as promoting the quality improvement and efficiency increase of sewage treatment plants and avoiding combined sewer overflow pollution. However, the collection and treatment of initial rainwater with a relatively high pollutant concentration have also become an important problem faced by the separate sewer drainage system.

[0003] Currently, there are two of the most common methods for initial rainwater collection and control. One method is to collect the initial rainwater in the water collection area into a storage tank through a storage pond, and then discharge the water in the storage pond into the sewage pipeline and finally into the sewage treatment plant. However, the distances between different rainwater inlets and the storage pond are different, so there are differences in the arrival times of the initial rainwater from different rainwater inlets at the storage pond. The initial rainwater at the far end may be mixed with the mid - to - late - stage rainwater at the near end, resulting in a relatively low pollutant concentration, ultimately affecting the influent concentration and treatment effect of the sewage treatment plant, and the engineering construction cost is relatively high. Another method is to set up an intercepting well at the end outlet of the municipal rainwater main pipe. A fixed weir gate or an intelligent intercepting gate is provided at the natural water body outlet end of the intercepting well to control the initial rainwater and dry - weather sewage to be intercepted and enter the sewage pipeline without being directly discharged into surface water. However, with the continuous progress of rainfall, a large amount of relatively clean rainwater at the far end or mid - to - late - stage rainwater will also enter the sewage pipeline and then be transported to the sewage treatment plant for treatment, which will also cause a decrease in the influent concentration of the sewage treatment plant, affect the treatment effect, and increase the operation 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 problems that the existing initial rainwater interception control facilities and methods lead to a decrease in the influent concentration of the sewage treatment plant, affect the sewage treatment effect, and at the same time increase the operation burden of the sewage treatment plant.

[0005] In the first aspect, the present invention provides an initial rainwater collection system, including: Collection device, one such collection device is provided in each drainage channel in the water collection area. The collection device includes: a water collection tank, a cover mechanism, an adjustment mechanism, and a detection mechanism. The water collection tank has a water collection cavity with an opening at one end. The cover mechanism is arranged at the opening. The cover mechanism has a closed state for closing the opening and an open state for opening the opening. The water collection tank is connected to the top end of the drainage channel through the adjustment mechanism. The adjustment mechanism is adapted to adjust the orientation of the opening. The detection mechanism is arranged in the water collection cavity for detecting the water volume information or water quality information in the water collection tank; The collection device has a water collection state, an over-flow state, and a drainage state. In the water collection state, the opening of the water collection tank faces the top end of the drainage channel, and the cover mechanism is in the open state to collect the initial rainwater. In the over-flow state, the opening of the water collection tank faces the side wall of the drainage channel, and the cover mechanism is in the closed state. In the drainage state, the opening of the water collection tank faces the bottom end or obliquely downward of the drainage channel, and the cover mechanism is in the open state to drain the initial rainwater in the water collection tank; Drainage pipe, the drainage channel is communicated with the drainage pipe; Sewage gate, the sewage gate is arranged at the drainage end of the drainage pipe. The sewage gate has a first closed state and a first open state for communicating the drainage pipe and the sewage treatment plant; Rainwater gate, the rainwater gate is arranged at the drainage end of the drainage pipe. The rainwater gate has a second closed state and a second open state for communicating the drainage pipe with the natural water body.

[0006] Beneficial effects In the initial stage of rainfall, the initial rainwater with a relatively high pollutant concentration can be collected and stored through the collection device. In the middle and late stages of rainfall, the relatively clean rainwater directly enters the drainage pipe from the drainage channel and then is discharged into the natural water body through the rainwater gate. After the rainfall ends, the initial rainwater is then discharged into the drainage pipe and enters the sewage treatment plant for treatment through the sewage gate. In this way, the initial rainwater with a relatively high pollutant concentration and the middle and late rainwater with a relatively low pollutant concentration will not be mixed, thus not affecting the sewage concentration entering the sewage treatment plant and not increasing the treatment load.

[0007] In an optional embodiment, the adjustment mechanism includes two telescopic rods. The two telescopic rods are respectively arranged on both sides of the water collection tank. One end of the telescopic rod is hinged to the water collection tank, and the other end is hinged to the top end of the drainage channel.

[0008] Beneficial effects The telescopic adjustment of the two telescopic rods can rotate the water collecting tank to change its position. When it is necessary to collect the initial rainwater, the opening of the water collecting tank is upward to facilitate the collection work. When it is not necessary to collect rainwater, the opening of the water collecting tank faces the side wall of the sewage channel, without affecting the inflow of rainwater into the drainage pipe.

[0009] In an alternative embodiment, the cover mechanism includes: two split cover plates and two sets of flipping mechanisms. The two sets of flipping mechanisms are oppositely arranged on the water collecting tank, and the two cover plates are respectively connected to the two sets of flipping mechanisms. The flipping mechanism is adapted to drive the cover plate to open and close.

[0010] In an alternative 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 cavity.

[0011] Beneficial effects The liquid level sensor is used to detect the water volume in the water collecting cavity, and according to the water volume, it is convenient to control the cover mechanism and the adjustment mechanism to perform corresponding actions.

[0012] In an alternative embodiment, the initial rainwater collection system further includes a control device, and the control device is electrically connected to the collection device, the sewage gate and the rainwater gate.

[0013] Beneficial effects By setting the control device, the automation and intelligent control of the system can be realized, and the refined control, that is, the accounting of the non-point source pollution load, can be realized according to the spatio-temporal distribution characteristics of the initial rainwater pollutants on the underlying surface in different regions.

[0014] In a second aspect, the present invention also provides a rainwater interception and discharge control method, which is applied to the initial rainwater collection system and includes: In the initial stage of rainfall, the water collecting tank is in a water collecting state to collect the initial rainwater; In the middle and late stages of rainfall, the water collecting tank is in a flow-through state, and the rainwater is discharged to the natural water body through the sewage channel, the drainage pipe and the rainwater gate; 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 sewage channel, the drainage pipe and the sewage gate.

[0015] Beneficial effects Since the rainwater interception and discharge control method is applied to the initial rainwater collection system, it has the same effects as the initial rainwater collection system, and will not be elaborated here.

[0016] In an alternative embodiment, in the step that in the initial stage of rainfall, the water collecting tank is in a water collecting state to collect the initial rainwater: The adjustment mechanism controls the opening of the water collecting tank to face the top end of the sewage channel; The cover body mechanism is in the open and closed state; The initial rainwater enters the water collecting tank from the top of the sewage channel and is stored therein.

[0017] In an optional embodiment, during the middle and late stages of rainfall, when the water collecting tank is in an overflow state and the rainwater is discharged to the natural water body through the sewage channel, the drainage pipe and the rainwater gate: The rainwater gate is in the second open state, and the sewage gate is in the first closed state; The cover body mechanism is in the closed state; The adjusting mechanism controls the opening of the water collecting tank to face the side wall of the sewage channel; The rainwater enters the sewage channel from the ground, then converges into the drainage pipe, and is then discharged to the natural water body through the rainwater gate.

[0018] In an optional embodiment, after the rainfall ends, when the water collecting tank is in a drainage state and the collected initial rainwater is discharged, and the initial rainwater is discharged to the sewage treatment plant through the sewage channel, the drainage pipe and the sewage gate: The rainwater gate is in the second closed state, and the sewage gate is in the first open state; The adjusting mechanism controls the opening of the water collecting tank to face the bottom end or obliquely downward of the sewage channel; The cover body mechanism is in the open and closed state; The initial rainwater stored in the water collecting tank flows from the sewage channel into the drainage pipe, and then is discharged into the sewage treatment plant through the sewage gate.

[0019] In an optional embodiment, the rainwater interception and discharge control method further includes: 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 sewage channel, the drainage pipe and the sewage gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the collecting device in the water collecting state in an initial rainwater collection system of the present invention; Figure 2Schematic diagram of the collection device in an initial rainwater collection system of the present invention when in an overcurrent state; Figure 3 Schematic diagram of the collection device in an initial rainwater collection system of the present invention.

[0022] Explanation of reference numerals: 1. Collection device, 11. Collection water tank, 12. Cover plate, 13. Telescopic rod, 14. Liquid level sensor; 2. Drainage channel, 21. Manhole cover; 3. Drainage pipe; 4. Sewage gate; 5. Rainwater gate; 6. Control device. Detailed implementation manners

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] The following combines Figures 1 to 3 , to describe the embodiments of the present invention.

[0028] 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. The collection device 1 includes: a water collection tank 11, a cover mechanism, an adjustment mechanism, and a detection mechanism. The water collection tank 11 has a water collection cavity with one end open. The cover mechanism is arranged at the opening. The cover mechanism has a closed state for closing the opening and an open state for opening the opening. The water collection tank 11 is connected to the top end of the sewer channel 2 through the adjustment mechanism. The adjustment mechanism is adapted to adjust the orientation of the opening. A detection mechanism is arranged in the water collection cavity for detecting the water quantity information or water quality information in the water collection tank 11. The collection device 1 has a water collection state, an over-flow state, and a drainage state. In the water collection state, the opening of the water collection tank 11 faces the top end of the sewer channel 2, and the cover mechanism is in the open state to collect the initial rainwater. In the over-flow state, the opening of the water collection tank 11 faces the side wall of the sewer channel 2, and the cover mechanism is in the 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 the open state to drain the initial rainwater in the water collection tank 11. The sewer channel 2 is communicated with the drainage pipe 3. The sewage gate 4 is arranged at the drainage end of the drainage pipe 3. The sewage gate 4 has a first closed state and a first open state for communicating the drainage pipe 3 with the sewage treatment plant. The rainwater gate 5 is arranged at the drainage end of the drainage pipe 3. The rainwater gate 5 has a second closed state and a second open state for communicating the drainage pipe 3 with the natural water body.

[0029] This initial rainwater collection system is particularly suitable for being arranged in the municipal drainage pipe network for the separate discharge of rainwater and sewage in urban areas. A plurality of sewer channels 2 will be selectively arranged in a certain water collection area. The top end of the sewer channel 2 is provided with a manhole cover 21 or a rainwater grate, which serves two purposes: one is to play a protective role to prevent pedestrians from falling into the sewer channel 2, and the other is to conduct preliminary filtration to filter some larger-volume pollutants to prevent them from entering the sewer channel 2 and causing blockage.

[0030] A collection device 1 is arranged in the sewer channel 2, and its main function is to collect the initial rainwater with a relatively high pollutant concentration. Specifically, the collection device 1 includes: a water collection tank 11, a cover mechanism, an adjustment mechanism, and a detection mechanism. The outer shape of the water collection tank 11 is similar to the shape of the sewer channel 2. In this embodiment, the outer shape of the water collection tank 11 is cylindrical, and the internal water collection cavity is also cylindrical. The cross-sectional area of the water collection tank 11 is slightly smaller than the cross-sectional area of the sewer channel 2. The depth of the water collection tank is determined according to the amount of initial rainwater to be collected. For example, in a water collection area with an area of s, n water collection tanks are arranged, and it is necessary to collect m millimeters of initial rainwater. Then the average collection volume of the water collection tank 11 in this water collection area is , the specific collection volume is adjusted and determined according to the water collection area, slope characteristics, functional zoning, etc. of the installation points of each water collection tank. The material of the water collection tank 11 should be corrosion-resistant stainless steel or plastic, etc. A cover mechanism is provided at the opening of the water collection tank 11, and the cover mechanism generally uses electric control to achieve opening and closing, that is, corresponding to the open state and the closed state. In the open state, the initial rainwater can be collected into the water collection cavity. In the closed state, the water collection cavity no longer continues to collect water, and at this time, it should be kept sealed to prevent the water in the water collection cavity from leaking. The water collection tank 11 is connected to the top end of the sewage channel 2 through an adjustment mechanism, and can be connected to the manhole cover 21 or the rainwater grate, or can be connected to the side wall of the sewage channel 2. The adjustment mechanism can not only fix the water collection tank 11, but also rotate the water collection tank 11 to adjust the position of the water collection tank 11. When collecting the initial rainwater, the adjustment mechanism rotates the water collection tank 11 so that the opening faces upward. When rainwater does not need to be collected, the adjustment mechanism rotates the water collection tank 11 so that the opening faces the side wall of the sewage channel 2, for example, making the axis of the water collection tank 11 perpendicular to the axis of the sewage channel 2. When it is necessary to discharge the initial rainwater collected in the water collection tank 11, the adjustment mechanism rotates the water collection tank 11 so that the opening faces the bottom end or the lower oblique direction of the sewage channel 2. A detection device is also provided on the inner wall of the water collection tank 11 to facilitate obtaining the water volume information or water quality information of the initial rainwater in the water collection cavity, and the state of the collection device 1 can be adjusted according to the water volume information or water quality information.

[0031] With the linkage and cooperation of the cover mechanism, the adjustment mechanism and the detection mechanism with the water collection tank 11, the collection device 1 has a water collection state, an over-flow state and a drainage state. In the water collection state, the initial rainwater is collected. At this time, the opening of the water collection tank 11 faces upward, and the cover mechanism is in the open state, making the opening open, and the initial rainwater can directly flow into the water collection tank 11 from the manhole cover 21, and the detection mechanism obtains the water volume information or water quality information in real time. When it is obtained that a sufficient amount of initial rainwater has been collected or it is detected that the rainwater entering the water collection tank 11 is relatively clean, it is judged that the middle and late stages of rainfall have entered, and the collection device 1 can be changed from the water collection state to the over-flow state. The cover mechanism is in the closed state to close the opening to prevent the initial rainwater from leaking. Then the adjustment mechanism rotates the water collection tank 11 so that the opening of the water collection tank 11 faces the side wall of the sewage channel 2. The middle and late stage rainwater directly flows down from the sewage channel 2, and at this time, the water collection tank 11 will not cause too much water resistance. After the rainfall ends, the collection device 1 is changed from the over-flow state to the drainage state to discharge the initial rainwater collected in the water collection tank 11.

[0032] The drainage pipe 3 is generally buried underground. The bottom end of the sewage channel 2 is connected to the drainage pipe 3, enabling the water from each sewage channel 2 to converge. At the drainage end of the sewage channel 2, there are a sewage gate 4 and a rain gate 5 to achieve rain and sewage separation. Both the sewage gate 4 and the rain gate 5 can be opened and closed, and their driving methods can be electric drive or hydraulic drive. When the sewage gate 4 is opened, the water in the drainage pipe 3 flows towards the sewage treatment plant. Therefore, generally, the water flowing in the drainage pipe 3 at this time is sewage. When the rain gate 5 is opened, the water in the drainage pipe 3 flows towards the natural water body. Therefore, generally, the water flowing in the drainage pipe 3 at this time is relatively clean water, and discharging it into the natural water body will not cause pollution.

[0033] After applying the initial rainwater collection system, in the initial stage of rainfall, the collection device 1 can be in the water collection state to collect the initial rainwater with a relatively high pollutant concentration. In the middle and late stages of rainfall, the collection device 1 can be in the overflow state, and the rainwater directly drains into the nearby natural water body through the rain gate 5. When the rainfall ends, then open the water collection tank 11 (the cover body mechanism is in the open and closed state) to discharge the stored initial rainwater, and discharge it into the sewage treatment plant through the sewage gate 4 for treatment. In this way, the initial rainwater with a relatively high pollutant concentration and the relatively clean middle and late stage rainwater will not be mixed together, nor will it reduce the pollutant concentration of the influent water in the sewage treatment plant. Eventually, the sewage treatment effect is better, and the operating load of the sewage treatment plant is smaller.

[0034] In one embodiment, the adjustment mechanism includes two telescopic rods 13. The two telescopic rods 13 are respectively arranged on both sides of the water collection tank 11, and one end of the telescopic rod 13 is hinged to the water collection tank 11, and the other end is hinged to the top end of the sewage channel 2.

[0035] The telescopic rod 13 is an electrically driven telescopic rod 13. One end is connected to the well cover 21, and the other end is connected to the upper end of the water collection tank 11, and the telescopic movements of the two telescopic rods 13 can be asynchronous. When one telescopic rod 13 extends, the other telescopic rod 13 shortens or remains stationary, the water collection tank 11 can be rotated. For example, it can be rotated from the state with the opening facing upward to the state with the opening facing the side wall of the sewage channel 2.

[0036] In other embodiments, the adjustment mechanism can also be in the form of a connecting rod plus a rotating shaft. One end of the two connecting rods is connected to the well cover 21, and the other end is connected to the end of the rotating shaft. Then, by setting a driving member to drive the rotating shaft to rotate, the entire water collection tank 11 can be rotated along with the rotating shaft to achieve the adjustment of the opening direction.

[0037] In other embodiments, the adjustment mechanism can also be in other structural forms, as long as it can achieve the rotation of the water collection tank 11. This embodiment does not specifically limit the adjustment mechanism.

[0038] In one embodiment, the cover mechanism includes: two split cover plates 12 and two sets of flipping mechanisms. The two sets of flipping mechanisms are oppositely arranged on the water collecting tank 11. The two cover plates 12 are respectively connected to the two sets of flipping mechanisms, and the flipping mechanisms are adapted to drive the cover plates 12 to open and close.

[0039] The water collecting tank 11 is cylindrical, and the shape of the cover plate 12 is semi-circular, so that the two cover plates 12 can cover the opening. The cover plate 12 and the top surface of the water collecting tank 11 can be rotatably connected through a rotating shaft. In this embodiment, the positions of the rotating connections are on both sides of the water collecting tank 11. The flipping mechanisms are arranged on the top surface of the water collecting tank 11. Specifically, a motor can be used to provide the rotational force, and the cover plate 12 is flipped open or closed through the transmission of a gear reducer.

[0040] In other embodiments, the number of the cover plates 12 can also be one, three, etc.; for example, one cover plate 12 is arranged at the opening, and a rotating shaft is arranged in the middle of the cover plate 12, and the two ends of the rotating shaft are rotatably arranged on the water collecting tank 11. The opening and closing of the opening of the water collecting tank 11 and the size of the opening can be controlled by the flipping angle of the cover plate 12. The operating mode of the cover plate 12 can also be other forms such as rotation and telescoping. For example, the cover plate 12 can be rotated around its connection point with the water collecting tank 11 in a plane to open or close the opening.

[0041] There are many types of cover mechanisms similar to this kind that can control the opening and closing of the opening of the water collecting tank 11. Correspondingly, there are also many types of shapes, numbers, mechanical transmission structures, and positions of rotational connections of the cover mechanisms for opening. This embodiment does not list them one by one and does not make specific limitations.

[0042] 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 arranged inside the water collecting cavity.

[0043] In this embodiment, a liquid level sensor 14 is arranged inside the water collecting cavity. The liquid level sensor 14 can be a liquid level gauge, which can directly measure the water level in the water collecting cavity, and then obtain the water volume information. Moreover, the collected water volume of the water collecting tank 11 can also be set according to the spatio-temporal distribution characteristics of the initial rainwater pollutants at different installation points. In other embodiments, the liquid level gauge can also be replaced by a weighing meter.

[0044] In other embodiments, a water quality sensor can be arranged inside the water collecting cavity. For example, online water quality probes such as COD (chemical oxygen demand in water body), ammonia nitrogen, and SS (suspended solids) can be installed in the water collecting tank 11 at the same time to realize the automatic, intelligent, and refined control of the system, and can more accurately calculate the non-point source pollution load in this area to assist the comprehensive treatment of the urban water environment.

[0045] In one embodiment, the initial rainwater collection system further includes a control device 6, and the control device 6 is electrically connected to the collection device 1, the sewage gate 4, and the rainwater gate 5.

[0046] The control device 6 can be a main control room set on the ground, which automatically controls the collection device 1, the sewage gate 4, and the rain gate 5 through a PLC. The control device 6 can reasonably regulate the cover mechanism, the adjustment mechanism, the sewage gate 4, and the rain gate 5 according to the local precipitation conditions (such as precipitation duration, rainfall, etc.) and the detection information of the liquid level sensor 14. For example, at the beginning of rainfall, the cover mechanism and the adjustment mechanism can be controlled to cooperate with each other so that the collection device 1 is in the water collection state to collect the initial rainwater. When the liquid level sensor 14 detects that the water volume reaches a predetermined value, the collection device 1 is controlled to change to the overflow state, and the rainwater directly drains through the rain gate 5. After the rainfall completely ends, the opening of the collection device 1 is opened again, and the initial rainwater drains through the sewage gate 4.

[0047] Moreover, the control device 6 can finely control the collected water volume of each collection device 1. For example, according to the rainfall interval, the volume of the initial rainwater collected each time can be adjusted. When the precipitation interval is long, it is considered that the pollutants carried by the initial rainwater are more, and the volume of the initial rainwater collected can be appropriately increased. For convenient adjustment, multiple gears of water volume can be set according to the rainfall interval duration for control. In addition, it can also be adjusted according to the installation location of each collection device 1, such as adjusting the water volume according to the underlying surface, slope, etc. of its installation location.

[0048] In other embodiments, if a water quality sensor is set, the pollutant concentration of the 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 clean compared with the beginning of rainfall, it can be determined that the rainfall has entered the middle and late stages from the initial stage, and the state of the collection device 1 can be adjusted accordingly.

[0049] 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 the 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.

[0050] The rainwater interception and discharge control method includes: (1) At the beginning of rainfall, the water collection tank 11 is in the water collection state to collect the initial rainwater.

[0051] At the beginning of rainfall, the rainwater forms runoff on the ground surface and carries pollutants into the sewage channel 2. Since the pollutant concentration in the rainwater is high at this time, it is collected through the water collection tank 11 for subsequent discharge into the sewage treatment plant for treatment.

[0052] Specifically, the adjustment mechanism controls the opening of the water collection tank 11 to face the top of the sewage channel 2; The control device 6 issues an instruction to control the adjusting mechanism. Through the coordinated cooperation of the two telescopic rods 13, the opening of the water collecting tank 11 faces upward and is directly opposite to the inside of the sewage channel 2.

[0053] The cover body mechanism is in an open / closed state; At the same time, the control device 6 issues an instruction to control the cover body mechanism to open, so that the opening is wide open, and thus the initial rainwater will directly flow into the water collecting tank 11. The above two steps can also be executed during the non-rainy period, so that the collection work can be carried out immediately when it rains.

[0054] The initial rainwater enters the water collecting tank 11 from the top end of the sewage channel 2 for storage.

[0055] The initial rainwater continuously flows into the water collecting tank 11 for storage. In this embodiment, the liquid level sensor 14 detects the liquid level and sends the water volume information to the control device 6. And at the beginning of rainfall, the sewage gate 4 and the rainwater gate 5 are both in the closed state when most of the initial rainwater has entered the water collecting tank 11.

[0056] In other embodiments, the water quality sensor can also be used to monitor the water quality of the rainwater entering the water collecting tank 11 in real time.

[0057] (2) In the middle and late stages of rainfall, the water collecting tank 11 is in an over-flow state, and the rainwater is discharged to the natural water body through the sewage channel 2, the drainage pipe 3, and the rainwater gate 5; In this embodiment, when the liquid level sensor 14 detects that the water volume information reaches the preset value, the collection of the initial rainwater is completed, and it enters the middle and late stages of rainfall. After the liquid level sensor 14 feeds back the water volume information to the control device 6, the control device 6 issues an instruction to control the water collecting tank 11 to change from the water collection state to the over-flow state and stop collecting rainwater. Since the rainwater is relatively clean at this time, it can be directly discharged into the natural water body.

[0058] In other embodiments, when the water quality sensor detects that the water quality of the rainwater entering the water collecting tank 11 reaches the preset qualified value through water quality probes such as online COD (chemical oxygen demand in water body), ammonia nitrogen, and SS (suspended solids), it can also be determined that it has entered the middle and late stages of rainfall.

[0059] Specifically, the rainwater gate 5 is in the second open state, and the sewage gate 4 is in the first closed state; The opening of the rainwater gate 5 means that the drainage pipe 3 is connected to the natural water body. However, since the rainwater is relatively clean at this time and does not need to be discharged into the sewage treatment plant, the sewage gate 4 remains closed.

[0060] The cover body mechanism is in the closed state; The two cover plates 12 are closed at the opening, and the water collecting tank 11 is in a sealed state to ensure that the collected initial rainwater will not leak.

[0061] The adjusting mechanism controls the opening of the water collecting tank 11 to face the side wall of the sewage channel 2; The two telescopic rods 13 are adjusted, one is extended and the other is shortened. The two cooperate to rotate the water collecting tank 11 so that the opening of the water collecting tank 11 faces the side wall of the sewage channel 2, and at this time, the water collecting tank 11 is close to the side wall of the sewage channel 2, and will not cause great interference to the rainwater flow in the sewage channel 2.

[0062] Rainwater enters the sewage channel 2 from the ground, then converges into the drainage pipe 3, and is then discharged to the natural water body through the rainwater gate 5.

[0063] The rainwater converged from each sewage channel 2 is in the drainage pipe 3, and then is discharged to the natural water body.

[0064] (3)After the rainfall ends, the water collecting tank 11 is in a drainage state, and the collected initial rainwater is discharged to the sewage treatment plant through the sewage channel 2, the drainage pipe 3, and the sewage gate 4.

[0065] After the rainfall ends, it is necessary to discharge the initial rainwater into the sewage treatment plant for treatment, and a series of purification treatments are carried out on the pollutants it carries before it can be discharged.

[0066] Specifically, the rainwater gate 5 is in the second closed state, and the sewage gate 4 is in the first open state; Since the initial rainwater with a high pollutant concentration will be discharged at this time, it is necessary to close the rainwater gate 5 to prevent water pollution from being discharged into the natural water body, and open the sewage gate 4 to discharge it into the sewage treatment plant.

[0067] The adjusting mechanism controls the opening of the water collecting tank 11 to face the bottom end or the lower oblique direction of the sewage channel 2; The cover mechanism is in an open / closed state; At this time, the opening of the water collecting tank 11 faces the lower oblique direction or the bottom end of the sewage channel 2, and the initial rainwater can be discharged directly by opening the cover mechanism.

[0068] The initial rainwater stored in the water collecting tank 11 flows into the drainage pipe 3 from the sewage channel 2, and then is discharged into the sewage treatment plant through the sewage gate 4.

[0069] The initial rainwater flows straight down from the sewage channel 2, converges in the drainage pipe 3, and then is uniformly discharged to the sewage treatment plant.

[0070] (4)During the non-rainy 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 a flow-through state, and the sewage is discharged to the sewage treatment plant through the sewage channel 2, the drainage pipe 3, and the sewage gate 4.

[0071] When there is no rainfall, the sewage discharged into the sewage channel 2 is generally domestic sewage, so it cannot be directly discharged into the natural water body, and needs to enter the sewage treatment plant to purify the domestic sewage.

[0072] While embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An initial rainwater collection system, characterized in that, Comprising: A collection device (1), one such collection device (1) is provided in each drain channel (2) of the water collection area. The collection device (1) includes: a water collection tank (11), a cover body mechanism, an adjustment mechanism, and a detection mechanism. The water collection tank (11) has a water collection cavity with one end open. The cover body mechanism is provided at the opening. The cover body mechanism has a closed state for closing the opening and an open state for opening the opening. The water collection tank (11) is connected to the top end of the drain channel (2) through the adjustment mechanism. The adjustment mechanism is adapted to adjust the orientation of the opening. A detection mechanism is provided in the water collection cavity for detecting the water quantity information or water quality information in the water collection tank (11); The collection device (1) has a water collection state, an over-flow state, and a drainage state. In the water collection state, the opening of the water collection tank (11) faces the top end of the drain channel (2), and the cover body mechanism is in the open state to collect initial rainwater. In the over-flow state, the opening of the water collection tank (11) faces the side wall of the drain channel (2), and the cover body mechanism is in the closed state. In the drainage state, the opening of the water collection tank (11) faces the bottom end or obliquely downward of the drain channel (2), and the cover body mechanism is in the open state to drain the initial rainwater in the water collection tank (11); A drainage pipe (3), the drain channel (2) is communicated with the drainage pipe (3); A sewage gate (4), the 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 for communicating the drainage pipe (3) with a sewage treatment plant; A rain gate (5), the rain gate (5) is provided at the drainage end of the drainage pipe (3). The rain gate (5) has a second closed state and a second open state for communicating the drainage pipe (3) with a natural water body.

2. The initial rainwater collection system according to claim 1, characterized in that, The adjustment mechanism includes two telescopic rods (13). The two telescopic rods (13) are respectively provided on both sides of the water collection tank (11). One end of the telescopic rod (13) is hinged to the water collection tank (11), and the other end is hinged to the top end of the drain channel (2).

3. The initial rainwater collection system according to claim 1, characterized in that, The cover body mechanism includes: two split cover plates (12) and two groups of flipping mechanisms. The two groups of flipping mechanisms are oppositely arranged on the water collection tank (11). The two cover plates (12) are respectively connected to the two groups of flipping mechanisms. The flipping mechanism is adapted to drive the cover plate (12) to open and close.

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

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

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

7. The rainwater interception and discharge control method according to claim 6, wherein In the initial stage of the rainfall, in the step of the water collecting tank (11) being in a water collection state to collect the initial rainwater: The adjusting mechanism controls the opening of the water collecting tank (11) to face the top end of the water discharge channel (2); The cover mechanism is in an open / closed state; The initial rainwater enters the water collecting tank (11) from the top end of the water discharge channel (2) and is stored therein.

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

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

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

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