First rain collection and discharge system

Abstract

The present invention discloses a primary rain collection and drainage system, which connects a water transfer chamber in a rainwater canal with a primary rain storage chamber located on one side of the water transfer chamber. The two chambers are connected via a water inlet in the sidewall of the water transfer chamber. When rain begins, the gate is in a first position, allowing primary rain to flow through the inlet into the primary rain storage chamber for collection. As rainfall increases, the liquid level in the water transfer chamber rises, and the float drives the gate upward to a second position, where it stops. Under the action of water pressure, the gate maintains its shielding over the inlet, achieving quantitative collection of primary rain. A siphon is installed in the primary rain storage chamber. The inlet section of the siphon extends into the bottom of the primary rain storage chamber, and the outlet section connects to a sewage pipe, which is located below the primary rain storage chamber. When the gate is in the second position, the water level in the primary rain storage chamber rises above the highest point of the siphon connection section, triggering a siphoning phenomenon. Primary rain automatically flows through the siphon into the sewage pipe until it is emptied. This system reduces construction, operation, and maintenance costs while eliminating the need for additional construction land.

Description

Technical Field

[0001] The present invention relates to the technical field of rainwater collection and utilization, in particular to a primary rainwater collection and discharge system. Background Art

[0002] Initial rainwater (or simply "first rain"), as the name suggests, is the initial rainfall, generally the 10-15mm thick precipitation that forms surface runoff. The pollution level of initial rainwater often exceeds that of ordinary municipal sewage. Direct discharge of initial rainwater into rivers or naturally occurring water bodies would pollute the water, necessitating its collection and treatment. Currently, initial rainwater runoff is often disposed of by discarding it. Alternatively, intercepting pipe networks are used to intercept initial rainwater, diverting it to sewage pipes and then transferring it to sewage treatment plants for purification. The primary rainwater collection facilities in the related art are mainly large-scale regulating and storage ponds. Large-scale regulating and storage ponds serve a large catchment area. The distances between the location of the regulating and storage ponds and different primary rain sites vary greatly, resulting in different times when the primary rain arrives at the regulating and storage ponds. When the primary rainwater generated far away from the regulating and storage ponds reaches the regulating and storage ponds, the regulating and storage ponds are already mixed with a large amount of non-primary rainwater generated near the regulating and storage ponds. As a result, the rainwater collected in the regulating and storage ponds usually contains rainwater from various time periods. The pollution concentration of the collected primary rainwater is not high, which increases the burden on the treatment of the subsequent primary rainwater. In addition, large-scale regulating and storage ponds usually occupy a large area and need to be equipped with drainage pumps and flushing equipment, which has high construction, use and maintenance costs. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a primary rain collection and discharge system that can hydraulically and automatically collect and discharge primary rain in a quantitative manner while having low construction and use costs.

[0004] The primary rain collection and discharge system according to an embodiment of the present invention includes:

[0005] A water transfer chamber is used to connect to the rainwater pipe, and a water inlet and a baffle are provided on the side wall of the water transfer chamber, wherein the baffle is located above the water inlet;

[0006] an initial rain storage chamber, located on one side of the water transfer chamber, the initial rain storage chamber being connected to the water transfer chamber through the water inlet;

[0007] A buoy is located in the water transfer compartment, and the baffle is used to limit the rising height of the buoy;

[0008] a gate connected to the buoy, the gate having a first state of being located below the water inlet and a second state of completely shielding the water inlet, the buoy being used to drive the gate to move from the first state to the second state;

[0009] The siphon comprises an inlet section, an outlet section, and a connecting section located between the inlet section and the outlet section, wherein the connecting section passes through a side wall of the primary rain storage chamber, one end of the inlet section extends into the bottom of the primary rain storage chamber, and the outlet section is located outside the primary rain storage chamber and is used to connect to a sewage pipe, wherein the sewage pipe is located at a height lower than that of the primary rain storage chamber.

[0010] When the gate moves from the first state to the second state, the water level in the initial rain storage chamber is higher than the highest point of the connecting section.

[0011] The initial rain collection and drainage system provided by the embodiments of the present invention has at least the following beneficial effects: The initial rain collection and drainage system includes a water transfer chamber and a primary rain storage chamber. The water transfer chamber is connected to the rainwater channel and serves as a node along the rainwater channel. The primary rain storage chamber is located on one side of the water transfer chamber, and the two are connected by a water inlet provided in the side wall of the water transfer chamber. When rain begins, the gate is in a first position, allowing initial rain to flow through the rainwater channel into the water transfer chamber and then through the water inlet into the primary rain storage chamber for collection. As rainfall increases, the liquid level in the water transfer chamber gradually rises, and the buoyancy of the float rises accordingly, driving the connected gate upward. When the gate moves to a second position, the float is stopped by a baffle provided in the side wall of the water transfer chamber and no longer moves upward. The gate maintains the second position under the action of water pressure, completing the quantitative collection of initial rain. A siphon is provided in the primary rain storage chamber. The siphon includes an inlet section, an outlet section, and a connecting section therebetween. One end of the inlet section extends into the bottom of the primary rain storage chamber, and the outlet section is located outside the primary rain storage chamber and is used to connect to the sewage pipe. The height of the sewage pipe is lower than that of the primary rain storage chamber. When the gate moves from the first state to the second state, the water level in the primary rain storage chamber is higher than the highest point of the connecting section. The primary rain flows into the inlet section and the connecting section through one end of the inlet section, and finally flows into the sewage pipe from the outlet section, thereby emptying the air in the siphon and triggering the siphon phenomenon. Under the action of the siphon, the primary rain automatically flows from the inlet section to the outlet section and into the sewage pipe until the primary rain collected in the primary rain storage chamber is emptied. The present application can achieve hydraulic automatic closure of the water inlet after quantitative collection of primary rain, and the primary rain collected in the primary rain storage chamber can be hydraulically automatically emptied through the siphon action, significantly reducing the cost of construction, operation, and maintenance of the primary rain collection and discharge system. At the same time, the initial rain storage capacity of this system is adjustable, and it can be flexibly opened along the rainwater pipes within the road area without the need for additional construction land.

[0012] According to some embodiments of the present invention, the water inlet is opened at the bottom of the side wall of the water transfer chamber, and a receiving groove is opened on the bottom wall of the water transfer chamber. When the gate is in the first state, the gate is located in the receiving groove.

[0013] According to some embodiments of the present invention, a water flow channel is provided on the bottom wall of the water flow chamber, and the water flow channel includes a first flow channel and a second flow channel that are cross-connected, the end of the first flow channel is connected to the water inlet, and the second flow channel is parallel to the water flow direction in the water flow chamber.

[0014] According to some embodiments of the present invention, the second flow trough is divided into an inlet trough and an outlet trough by the first flow trough, the inlet trough is located on the side where rainwater flows into the water transfer chamber, and the outlet trough is located on the side where rainwater flows out of the water transfer chamber, and the width of the inlet trough is greater than the width of the outlet trough.

[0015] According to some embodiments of the present invention, the width of the water inlet trough is 250 mm, and the width of the water outlet trough is 50 mm.

[0016] According to some embodiments of the present invention, the width of the first flow channel is 200 mm.

[0017] According to some embodiments of the present invention, the height of the water flow channel is the same as the opening height of the water inlet.

[0018] According to some embodiments of the present invention, a groove is formed on the bottom wall of the initial rain storage chamber, and one end of the water inlet section extends into the groove.

[0019] According to some embodiments of the present invention, the number of the primary rain storage chambers is 2, and the two primary rain storage chambers are distributed on both sides of the water transfer chamber perpendicular to the flow direction of rainwater.

[0020] According to some embodiments of the present invention, the width of the primary rain collection and drainage system perpendicular to the direction of rainwater flow is greater than 1.1 meters.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0023] Figure 1 A schematic cross-sectional view of a system for collecting and discharging initial rainwater provided by an embodiment of the present invention;

[0024] Figure 2 A schematic plan view of a primary rain collection and discharge system provided in an embodiment of the present invention.

[0025] Figure 1: Water transfer chamber 100, water transfer chamber side wall 110, water inlet 111, grid 112, water transfer chamber bottom wall 120, accommodating groove 121, water flow channel 130, first flow channel 131, second flow channel 132, water inlet channel 1321, water outlet channel 1322, float 140, gate 150, initial rain storage chamber 200, groove 210, siphon 300, water inlet section 310, water inlet end 311, water outlet section 320, water outlet end 321, connecting section 330, rainwater pipe 400. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," and "exceed" are understood to be exclusive of the number itself, while "above," "below," and "within" are understood to be inclusive of the number itself. The terms "first," "second," and so on in the specification, claims, and drawings are used to distinguish similar items and are not necessarily used to describe a specific order or precedence.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0029] In the description of the present invention, unless otherwise expressly defined, terms such as "disposed," "mounted," and "connected" should be interpreted broadly. For example, they may refer to fixed or movable connections, removable or non-removable connections, or integral connections. They may also refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0030] The present invention provides a primary rainwater collection and drainage system, comprising a water transfer chamber 100, a primary rainwater storage chamber 200, a buoy 140, a gate 150, and a siphon 300. The front and rear ends of the water transfer chamber 100 are connected to a municipal rainwater channel 400. The rainwater channel 400 collects and transports rainwater, effectively removing groundwater. The rainwater channel 400 prevents groundwater accumulation in urban residential and industrial areas, thereby disrupting normal life and production. Specifically, the rainwater channel 400 includes neighborhood rainwater tributaries, factory rainwater tributaries, street rainwater tributaries, and urban rainwater mains. After a rainstorm, groundwater forms surface runoff and flows into a rainwater outlet located on the road surface. After confluence, it flows into the rainwater channel 400. The water transfer chamber 100 serves as an intermediate point along the rainwater channel 400 as it flows. This application provides a preliminary rain storage chamber 200 on one side of the water transfer chamber 100 to quantitatively collect the initial rainwater flowing through the rainwater pipe 400 during the initial period of rainfall. After the quantitative collection is completed, the water inlet 111 of the preliminary rain storage chamber 200 is hydraulically automatically closed, and the later, cleaner rainwater flows through the water chamber 100 and continues to flow into the rainwater pipe 400.

[0031] Figure 1 Shows a cross-sectional view of the initial rain collection and discharge system provided by this application, with reference to Figure 1 In the figure, the direction perpendicular to the paper plane represents the direction of rainwater flow within the rainwater pipe 400 and the water transfer chamber 100. The primary rainwater storage chamber 200 is located on one side of the water transfer chamber 100. A water inlet 111 is provided on the sidewall connecting the water transfer chamber 100 and the primary rainwater storage chamber 200. The primary rainwater storage chamber 200 and the water transfer chamber 100 are connected via the water inlet 111, allowing rainwater to flow into the primary rainwater storage chamber 200. A float 140 is located within the water transfer chamber 100, with a gate 150 connected below it. The float 140 has a lower density than water. When rainwater flows through the water transfer chamber 100, the float 140 floats on the water surface, driving the gate 150 upward as the water level rises.

[0032] It should be noted that gate 150 has a first state, located below water inlet 111, and a second state, completely blocking water inlet 111. When no rainwater flows through the water transfer chamber 100, gate 150 is in the first state, i.e., it is located below water inlet 111 under the action of gravity, and water inlet 111 is open. After a rainstorm, surface runoff from the initial stage of rainfall flows into the stormwater channel 400 and into the water transfer chamber 100, flowing through the open water inlet 111 into the primary rain storage chamber 200 for collection. As rainfall increases, the water level in the water transfer chamber 100 rises. The buoyancy of the float 140 causes it to rise continuously with the rising water level, driving gate 150 upward until it reaches the second state, i.e., gate 150 completely blocks water inlet 111, and rainwater stops flowing into the primary rain storage chamber 200, completing the quantitative collection process for primary rain.

[0033] Before gate 150 moves to its second position—that is, before water inlet 111 is closed—the rainwater flowing through water passage chamber 100 is primarily rainwater. This rainwater flows through water inlet 111 into primary rain storage chamber 200 for collection. As rainfall continues, the amount of rain increases, and the pollutant content in the rainwater gradually decreases. During this process, gate 150, driven by buoy 140, rises from its first position to its second position. When gate 150 moves to its second position, it rises to a position completely covering water inlet 111. At this point, the rainwater flowing through water passage chamber 100 is relatively clean, primarily rainwater. This rainwater flows directly through water passage chamber 100 and back into rainwater conduit 400 for collection.

[0034] Furthermore, after buoy 140 drives gate 150 to its second position, it is stopped by a baffle (not shown) mounted on the sidewall 110 of the water transfer chamber, above the water inlet 111, and no longer floats upward with the rising liquid level in the water transfer chamber 100. The liquid level in the water transfer chamber 100 submerges gate 150, and gate 150, under the action of water pressure, clings to the sidewall 110, maintaining its second position, completely shielding the water inlet 111. After rainfall ceases, the rainwater in the stormwater conduit 400 gradually drains, and the liquid level in the water transfer chamber 100 gradually drops. When the liquid level drops below the lowest point of gate 150, the water pressure acting on gate 150 dissipates, and gate 150 freely falls under the action of gravity, returning from its second position to its first position and dropping back below the water inlet 111, ready to collect the next initial rainfall.

[0035] In the initial rain collection and discharge system provided by the present application, the initial rain collected in the initial rain storage chamber 200 is automatically discharged into the sewage pipe for treatment through the siphon effect. The siphon tube 300 utilizes the siphon principle to empty the initial rain collected in the initial rain storage chamber 200 without the need for external force. The siphon phenomenon is caused by the attraction and potential energy difference between liquid molecules, that is, the pressure difference of the water column is used to make the water rise and then flow to a lower place. Because the water surface at the pipe mouth is subject to different atmospheric pressures, the water will flow from the side with high pressure to the side with low pressure until the atmospheric pressure on both sides is equal, the water surface of the container becomes the same height, and the water will stop flowing. When extracting liquid using the siphon principle, the liquid level at the water inlet end must be higher than the liquid level at the water outlet end. At the beginning, the gas in the siphon tube must be squeezed out to fill the tube body with liquid. Subsequently, the liquid can automatically flow from the water inlet end to the water outlet end under the action of the siphon principle until the liquid levels at the water inlet end and the water outlet end become the same height.

[0036] refer to Figure 1 In the primary rain collection and drainage system provided herein, the siphon tube 300 includes an inlet section 310, an outlet section 320, and a connecting section 330 between the inlet section 310 and the outlet section 320. The connecting section 330 passes through the side wall of the primary rain storage chamber 200, so that the inlet section 310 of the siphon tube 300 is located within the primary rain storage chamber 200, with one end of the inlet section 310 extending into the bottom of the primary rain storage chamber 200, and the outlet section 320 is located outside the primary rain storage chamber 200. The outlet section 320 is connected to a sewage pipe (not shown), and the primary rain storage chamber 200 is located at a higher level than the sewage pipe. Furthermore, the end of the water inlet section 310 away from the connecting section 330 is the water inlet end 311, which extends into the bottom of the initial rain storage chamber 200, and the end of the water outlet section 320 away from the connecting section 330 is the water outlet end 321, which extends into the sewage pipe and is immersed below the liquid surface in the sewage pipe.

[0037] It should be noted that in this application, by designing the dimensions of the water inlet 111 and the connection between the float 140 and the gate 150, it is possible to ensure that when the gate 150 moves from the first state to the second state under the drive of the float 140, the water level in the initial rain storage chamber 200 is higher than the highest point of the connecting section 330, thereby ensuring the occurrence of a siphoning phenomenon. When the liquid level in the initial rain storage chamber 200 is higher than the water inlet end 311, rainwater flows into the water inlet section 310 through the water inlet end 311, and the liquid level in the water inlet section 310 remains consistent with the liquid level in the initial rain storage chamber 200. As the amount of initial rain flowing into the water inlet 111 increases, the liquid level in the initial rain storage chamber 200 continues to rise, and the liquid level in the water inlet section 310 also increases accordingly. When the liquid level in the initial rain storage chamber 200 rises above the highest point of the connecting section 330, the rainwater in the siphon tube 300 overflows, filling both the inlet section 310 and the connecting section 330. Under gravity, the rainwater in the connecting section 330 then flows out of the outlet section 320, filling it completely, completing the process of evacuating the air from the siphon tube 300 and triggering the siphoning phenomenon. Once the siphoning phenomenon occurs, the liquid in the siphon tube 300 automatically flows from the inlet end 311 to the outlet end 321, gradually draining the initial rainwater collected in the initial rain storage chamber 200. Because the initial rain storage chamber 200 is located at a higher elevation than the sewage pipe, the inlet end 311 remains higher than the outlet end 321. The siphoning phenomenon continues until the initial rain storage chamber 200 is completely drained.

[0038] Furthermore, in one embodiment of the present application, by designing the size of the water inlet 111 and the connection relationship between the float 140 and the gate 150, it can be achieved that when the gate 150 moves from the first state to the second state driven by the float 140, the water level line in the initial rain storage chamber 200 is 50 mm higher than the highest point of the connecting section 330, so as to ensure that after the gate 150 is closed, the liquid level stored in the initial rain storage chamber 200 can maintain the stable siphon phenomenon.

[0039] Further, refer to Figure 1 In one embodiment of the present application, a groove 210 is excavated in the bottom wall of the primary rain storage chamber 200 to accommodate the water inlet end 311 of the siphon tube 300. The groove 210 ensures that as the liquid level in the primary rain storage chamber 200 decreases, the water inlet end 311 of the siphon tube 300 remains submerged, ensuring that the siphoning process continues stably until all liquid in the primary rain storage chamber 200 is drained.

[0040] In one embodiment of the present application, for example, a rope connects buoy 140 and gate 150, with the ends of the rope fixed to buoy 140 and gate 150, respectively. After initial rainwater flows into flood chamber 100, buoy 140 floats on the water surface due to buoyancy. As the water level in flood chamber 100 rises, buoy 140 gradually moves upward, gradually tightening the rope. Once the rope is tightened, the rope pulls gate 150 upward. The connection between buoy 140 and gate 150 can also be achieved through other methods, such as a pull rod, as long as it can pull gate 150 from the first state to the second state. This application does not provide a detailed description of these methods.

[0041] In one embodiment of the present application, a water inlet 111 is provided at the bottom of the water transfer chamber sidewall 110, and a receiving groove 121 is provided on the water transfer chamber bottom wall 120 to provide a receiving space for the gate 150 in the first state. The lower the water inlet 111 is located, the earlier the initial rainwater can be collected. By providing the water inlet 111 at the bottom of the water transfer chamber sidewall 110, as much initial rainwater with a high pollutant content as possible can be collected into the initial rainwater storage chamber 200. Figure 1 In this application, a grid 112 is installed at the water inlet 111 to filter out larger solid pollutants mixed in the initial rain, such as branches and dead leaves, etc., to reduce the burden of later maintenance of the initial rain storage chamber 200.

[0042] Figure 2 Shows a plan view of the initial rain collection and drainage system provided by this application, with reference to Figure 2 A water flow channel 130 is provided on the bottom wall 120 of the water flow chamber. The water flow channel 130 includes a first flow channel 131 and a second flow channel 132 that are intersecting and communicating. Figure 2 The direction of the second flow channel 132 is parallel to the direction of rainwater flow in the water-passing chamber 100, that is, Figure 2 The direction indicated by the arrow in the middle. The end of the first flow channel 131 is connected to the water inlet 111. The first flow channel 131 and the second flow channel 132 intersect and communicate with each other. The second flow channel 132 is divided by the first flow channel 131 into an inlet channel 1321 and an outlet channel 1322. The inlet channel 1321 is located on the side where rainwater flows into the water passage chamber 100, and the outlet channel 1322 is located on the side where rainwater flows out of the water passage chamber 100.

[0043] The water flow channel 130 is located on the bottom wall 120 of the water flow chamber 100 and serves to drain water when the liquid level is low and the water flow is low. First, during the initial rainfall period, when the flow rate is low, a small amount of initial rainwater flows from the rainwater pipe 400 into the water flow chamber 100 via the inlet trough 1321 of the second flow channel 132. When this initial rainwater reaches the intersection of the first and second flow channels 131, 132, it is guided by the first flow channel 131 toward the water inlet 111 and into the initial rainwater storage chamber 200, where it is collected. Compared to allowing the initial rainwater to flow directly into the water flow chamber 100, the water flow channel 130 can direct more initial rainwater to the initial rainwater storage chamber 200, minimizing the mixing of the pollutant-laden initial rainwater with later rainwater. Secondly, after rainfall ends, the rainwater in the stormwater conduit 400 gradually drains. When the liquid level in the water-passing chamber 100 drops below the level of the water-passing gutter 130, the rainwater in the water-passing gutter 130 flows in the direction defined by the first gutter 131 and the second gutter 132. Before the rainwater is completely drained, some rainwater will remain in the first gutter 131. The end of the first gutter 131 is connected to the water inlet 111. This residual rainwater can still exert pressure on the gate 150, keeping it in the second state (i.e., closing the water inlet 111), preventing the relatively clean late-stage rainwater from flowing into the primary rain storage chamber 200. The drainage function of the water-passing gutter 130 at the end of rainfall not only improves the utilization rate of late-stage rainwater but also reduces the space occupied by late-stage rainwater in the primary rain storage chamber 200, which could result in less primary rainwater being collected during the next rainfall than the designed amount.

[0044] In the present application, the widths of the inlet trough 1321 and the outlet trough 1322 of the second trough 132 are designed to be different, and the width of the inlet trough 1321 is greater than the width of the outlet trough 1322. For example, in one embodiment of the present application, the width of the inlet trough 1321 of the second trough 132 is designed to be 250 mm, the width of the outlet trough 1322 is designed to be 50 mm, and the width of the first trough 131 is designed to be 200 mm. The width of the inlet trough 1321 is greater than the width of the outlet trough 1322. In the same period of time, more rainwater flows into the flow channel 130 than flows out, guiding more rainwater to flow along the first flow channel 131, relatively extending the residence time of rainwater in the first flow channel 131 and further enhancing the drainage function of the flow channel 130. Furthermore, the design of the outlet trough 1322 ensures that rainwater in the water trough 130 is completely drained after rainfall, eliminating any residual rainwater in the first trough 131 to exert pressure on the gate 150. This ensures that the gate 150 automatically descends under the action of gravity, ensuring that the initial rainwater collection and discharge system can function properly during the next rainfall. It should be noted that the widths of the first trough 131, the inlet trough 1321, and the outlet trough 1322 can all be designed to other values, and this application does not provide examples of each.

[0045] In this application, the height of the water flow channel 130 and the height of the water inlet 111 are designed to be the same. For example, in one embodiment of this application, the water inlet 111 is designed as a square hole, and the planar dimensions of the water inlet 111 are designed to be 150mm*150mm, that is, the height of the water inlet 111 on the side wall 110 of the water flow chamber is 150mm, and the height of the water flow channel 130 is also designed to be 150mm. Correspondingly, the height of the gate 150 should also be greater than 150mm to completely cover the water inlet 111 in the second state. It should be noted that the shape and planar dimensions of the water inlet 111 can be adjusted according to specific circumstances and are not specifically limited in this application.

[0046] refer to Figure 1 and Figure 2 In this application, there are two primary rain storage chambers 200, which are located perpendicular to the direction of rainwater flow on both sides of the water transfer chamber 100. Water inlets 111 are provided on the sidewalls of both sides of the water transfer chamber 100 to connect the primary rain storage chambers 200. Each water inlet 111 is equipped with a gate 150 and a float 140 connected to the gate 150, which enables the water inlet 111 to be hydraulically opened and closed automatically. The two ends of the first flow channel 131 are respectively connected to the water inlets 111 on both sides, directing primary rainwater into the primary rain storage chambers 200 on both sides. Siphons 300 are provided in each primary rain storage chamber 200 to hydraulically and automatically discharge the primary rainwater collected in the primary rain storage chambers 200 into the sewage pipe for subsequent treatment.

[0047] Figure 2 The schematic diagram of the initial rain collection and drainage system provided for this application is shown in the following figure. Figure 2 In this application, the plane size of the initial rain storage chamber 200 should be designed according to the expected collection volume of initial rain and the actual layout of the pipelines in the road cross section. In this application, the initial rain collection and discharge system is defined as perpendicular to the direction of rainwater flow ( Figure 2 The width dimension (in the direction of the arrow in the figure) is greater than 1.1 meters, and the maximum width should ensure that the minimum distance between the primary rain storage room 200 and other municipal pipelines and underground buildings meets the national standard.

[0048] It should be noted that the initial rain collection and discharge system provided in this application can be prefabricated in a factory and installed at a node along the rainwater canal 400, or it can be excavated on-site. When urban terrain is restricted, multiple small-sized initial rain collection and discharge systems can be discretely arranged along the extension direction of the rainwater canal 400 to improve the efficiency of initial rain collection. When road conditions are met, the longitudinal length of the initial rain collection and discharge system can extend along the direction of the rainwater canal 400, forming a corridor-type initial rain collection and discharge system.

[0049] In summary, the initial rain collection and discharge system provided by this application has the following advantages:

[0050] (1) The construction form is flexible and can be discretely opened according to road conditions without occupying urban construction land, thereby improving the utilization rate of urban municipal construction land.

[0051] (2) The initial rain holding capacity has a wide range of variation and can be constructed together with the rainwater pipe 400, with low construction difficulty and low construction cost.

[0052] (3) The collection and discharge of initial rainwater is automatically realized by hydraulic power, with low use and maintenance costs.

[0053] (4) The water flow channel 130 plays a diversion role for the initial rain when the flow rate is relatively low, controls the collection amount and collection period of the initial rain, increases the concentration of pollutants in the collected initial rain, and reduces the burden of sewage treatment.

[0054] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. A primary rain collection and discharge system, characterized in that: include: A water transfer chamber is used to connect to the rainwater pipe, and a water inlet and a baffle are provided on the side wall of the water transfer chamber, wherein the baffle is located above the water inlet; an initial rain storage chamber, located on one side of the water transfer chamber, the initial rain storage chamber being connected to the water transfer chamber through the water inlet; A buoy is located in the water transfer compartment, and the baffle is used to limit the rising height of the buoy; a gate connected to the buoy, the gate having a first state of being located below the water inlet and a second state of completely shielding the water inlet, the buoy being used to drive the gate to move from the first state to the second state; a siphon comprising an inlet section, an outlet section, and a connecting section between the inlet section and the outlet section, the connecting section passing through a side wall of the primary rain storage chamber, one end of the inlet section extending into the bottom of the primary rain storage chamber, the outlet section being located outside the primary rain storage chamber and connected to a sewage pipe, the sewage pipe being located at a height lower than that of the primary rain storage chamber; When the gate moves from the first state to the second state, the water level in the initial rain storage chamber is higher than the highest point of the connecting section; A water flow channel is provided on the bottom wall of the water transfer chamber, and the water flow channel includes a first flow channel and a second flow channel that are interconnected, wherein the end of the first flow channel is connected to the water inlet, and the second flow channel is parallel to the water flow direction in the water transfer chamber; The second flow trough is divided into an inlet trough and an outlet trough by the first flow trough. The inlet trough is located on the side where rainwater flows into the water transfer chamber, and the outlet trough is located on the side where rainwater flows out of the water transfer chamber. The width of the inlet trough is greater than the width of the outlet trough.

2. The primary rain collection and drainage system according to claim 1, characterized in that: The water inlet is opened at the bottom of the side wall of the water transfer chamber, and a receiving groove is opened on the bottom wall of the water transfer chamber. When the gate is in the first state, the gate is located in the receiving groove.

3. The primary rain collection and drainage system according to claim 1, characterized in that: The width of the water inlet trough is 250 mm, and the width of the water outlet trough is 50 mm.

4. The primary rain collection and drainage system according to claim 1, characterized in that: The width of the first flow channel is 200 mm.

5. The primary rain collection and drainage system according to claim 1, characterized in that: The height of the water flow channel is the same as the opening height of the water inlet.

6. The primary rain collection and drainage system according to claim 1, characterized in that: A groove is provided on the bottom wall of the initial rain storage chamber, and one end of the water inlet section extends into the groove.

7. The primary rain collection and drainage system according to claim 1, characterized in that: The number of the initial rain storage chambers is 2, and the 2 initial rain storage chambers are distributed on both sides of the water transfer compartment perpendicular to the flow direction of rainwater.

8. The primary rain collection and drainage system according to claim 1, characterized in that: The width of the primary rain collection and drainage system perpendicular to the direction of rainwater flow is greater than 1.1 meters.

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