CN115467389A - First rain collecting and discharging system - Google Patents

Abstract

The invention discloses an initial rain collecting and discharging system which is used for communicating a water passing cabin of a rainwater pipe canal with an initial rain storage chamber positioned on one side of the water passing cabin, wherein the water passing cabin and the initial rain storage chamber are communicated through a water inlet arranged on the side wall of the water passing cabin. When raining begins, the gate is in the first state, and the initial rain flows into the initial rain storage chamber through the water inlet to be collected. Along with the increase of rainfall, the liquid level in the water passing cabin rises, the buoy drives the gate to move upwards to the second state and then stops, and the gate keeps shielding the water inlet under the action of water pressure to finish the quantitative collection of the initial rain. The primary rain storage chamber is internally provided with a siphon, a water inlet section of the siphon extends into the bottom of the primary rain storage chamber, a water outlet section of the siphon is used for being communicated with a sewage pipe, and the sewage pipe is lower than the primary rain storage chamber. When the gate moves to the second state, the water level in the initial rain storage chamber is higher than the highest point of the siphon connecting section, the siphon phenomenon is triggered, and initial rain automatically flows to the sewage pipe through the siphon pipe until emptying. The system can reduce the construction, operation and maintenance cost, and meanwhile, a new construction land is not required to be added.

Description

First rain collecting and discharging system

Technical Field

The invention relates to the technical field of rainwater collection and utilization, in particular to a primary rainwater collection and drainage system.

Background

The initial rain water (called initial rain for short) is rain water at the initial stage of rainfall, and generally refers to the rainfall with the surface runoff formed by the thickness of 10-15mm on the ground. The pollution level of the initial rain is usually higher than that of the common urban sewage. If the initial rain is directly discharged into a river channel or naturally borne by a water body, the water body is polluted, so the initial rain must be collected and treated. At present, the disposal mode of discarding the initial rain runoff is mostly adopted, the initial rain interception is carried out by adopting an interception pipe network system, and the initial rain is intercepted to a sewage pipeline by using the interception pipe network system and then is sent to a sewage treatment plant for purification treatment. Facility is collected to first rain among the correlation technique is mainly large-scale regulation pond, the catchment area that large-scale regulation pond was served is great, the position of regulation pond and the difference of the distance between the rain emergence ground are great just, and then the time that first rain reachs the regulation pond is different, keep away from behind the first rain arrival regulation pond that the regulation pond place produced, the regulation pond has been mixed in a large amount and is close to the non first rain that the regulation pond place produced, the rainwater that leads to collecting in the regulation pond generally includes the rainwater of each period, the first rain pollution concentration of collecting is not high, increase burden for the processing of later stage first rain. In addition, large storage tanks typically occupy a large area, require the provision of drainage pumps and flushing equipment, and are costly to build, use and maintain.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the initial rain collecting and discharging system which can collect and discharge initial rain automatically and quantitatively in a hydraulic mode and is low in construction and use cost.

The initial rain collecting and discharging system comprises:

the water passing cabin is used for being communicated with the rainwater pipe duct, a water inlet and a baffle are formed in the side wall of the water passing cabin, and the baffle is located above the water inlet;

the initial rain storage chamber is positioned at one side of the water passing cabin and is communicated with the water passing cabin through the water inlet;

the floating cylinder is positioned in the water passing cabin, and the baffle is used for limiting the rising height of the floating cylinder;

the gate is connected with the buoy, the gate has a first state below the water inlet and a second state completely shielding the water inlet, and the buoy is used for driving the gate to move from the first state to the second state;

the siphon comprises a water inlet section, a water outlet section and a connecting section positioned between the water inlet section and the water outlet section, wherein the connecting section penetrates through the side wall of the primary rain storage chamber, one end of the water inlet section extends into the bottom of the primary rain storage chamber, the water outlet section is positioned outside the primary rain storage chamber and is communicated with a sewage pipe, and 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 line in the initial rain storage chamber is higher than the highest point of the connecting section.

The initial rain collecting and discharging system provided by the embodiment of the invention at least has the following beneficial effects: the initial rain collecting and discharging system comprises a water passing cabin and an initial rain storage chamber, wherein the water passing cabin is communicated with the rainwater pipe channel and is a node through which rainwater flows in the flowing process along the rainwater pipe channel. The primary rain storage chamber is positioned at one side of the water passing cabin and communicated with the primary rain storage chamber through a water inlet arranged on the side wall of the water passing cabin. When beginning to rain, the gate is in first state, and first rain flows into through the water cabin indoor through the rainwater pipe canal to rain is collected for the first time in flowing into the first rain apotheca through the water inlet. Along with the increase of rainfall, the liquid level in the water passing cabin gradually rises, the floating barrel rises along with the liquid level under the action of buoyancy, and the gate connected with the floating barrel is driven to move upwards. When the gate moves to the second state, the buoy is blocked by the baffle plate arranged on the side wall of the water passing cabin and does not move upwards any more, and the gate keeps the second state under the action of water pressure to finish the quantitative collection of the primary rain. The siphon is arranged in the primary rain storage chamber and comprises a water inlet section, a water outlet section and a connecting section between the water inlet section and the water outlet section, one end of the water inlet section extends into the bottom of the primary rain storage chamber, and the water outlet section is located outside the primary rain storage chamber and is used for being communicated with a 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 line in the primary rain storage chamber is higher than the highest point of the connecting section, primary rain overflows into the water inlet section and the connecting section through one end of the water inlet section and finally flows into the sewage pipe from the water outlet section, air in the siphon is emptied, and the siphon phenomenon is triggered to occur. Under the siphon action, the initial rain automatically flows from the water inlet section to the water outlet section and flows to the sewage pipe until the initial rain collected in the initial rain storage chamber is emptied. This application can realize that the initial rain accessible siphon effect water conservancy automatic evacuation of collecting in the hydraulic power self-closing, the initial rain apotheca of collection back mouth of a river, the initial rain ration reduces initial rain by a wide margin and collects the cost that discharge system was constructed, operated and maintained. Simultaneously, this system is first rain volume of holding adjustable, can open in a flexible way along rainwater pipe canal and locate the road scope, need not newly to increase the land for construction.

According to some embodiments of the present invention, the water inlet is disposed at the bottom of the side wall of the water passing chamber, a containing groove is disposed on the bottom wall of the water passing chamber, and when the gate is in the first state, the gate is disposed in the containing groove.

According to some embodiments of the invention, the bottom wall of the water passing chamber is provided with water passing flow grooves, each water passing flow groove comprises a first flow groove and a second flow groove which are communicated with each other in a crossing manner, the end part of each first flow groove is communicated with the water inlet, and the second flow groove is parallel to the water flow direction in the water passing chamber.

According to some embodiments of the invention, the second runner is divided into an inlet channel and an outlet channel by the first runner, the inlet channel is positioned on the side of the overflow chamber where rainwater flows in, the outlet channel is positioned on the side of the overflow chamber where rainwater flows out, and the width of the inlet channel is larger than that of the outlet channel.

According to some embodiments of the invention, the inlet channel has a channel width of 250mm and the outlet channel has a channel width of 50mm.

According to some embodiments of the invention, the first launder has a groove width of 200mm.

According to some embodiments of the invention, the height of the overflow launder is the same as the opening height of the water inlet.

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

According to some embodiments of the present invention, the number of the first rain storage chambers is 2, and 2 first rain storage chambers are distributed on two sides of the water passing cabin perpendicular to the flowing direction of the rainwater.

According to some embodiments of the invention, the width dimension of the primary rain collecting and draining system perpendicular to the flow direction of the rain water is more than 1.1 m.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic cross-sectional view of an initial rain collection and drain system provided by an embodiment of the present invention;

fig. 2 is a schematic plan view of an initial rain collection and drainage system according to an embodiment of the present invention.

Reference numerals are as follows: the rain water tank comprises a water tank 100, a water tank side wall 110, a water inlet 111, a grid 112, a water tank bottom wall 120, a containing groove 121, a water flowing groove 130, a first flowing groove 131, a second flowing groove 132, a water inlet groove 1321, a water outlet groove 1322, a buoy 140, a gate 150, a primary rain storage chamber 200, a groove 210, a siphon 300, a water inlet section 310, a water inlet end 311, a water outlet section 320, a water outlet end 321, a connecting section 330 and a rainwater canal 400.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. The terms first, second and the like in the description and in the claims, and the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In the description of the present invention, it should be understood that the positional descriptions, such as the directions or positional relationships indicated above, below, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings 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 direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless explicitly defined otherwise, terms such as set, installed, connected, etc., should be interpreted broadly, such as may be fixed or movable, detachable or non-detachable, or integral; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The invention provides a primary rain collecting and discharging system, which comprises a water passing cabin 100, a primary rain storage chamber 200, a buoy 140, a gate 150 and a siphon 300. The front end and the rear end of the water passing cabin 100 are respectively communicated with a rainwater pipe channel 400 of a municipal pipeline, and the rainwater pipe channel 400 is a pipeline for collecting and conveying rainwater and is used for timely removing rainwater on the ground. The rainwater pipe channel 400 can prevent surface water accumulation in urban residential areas and industrial enterprise areas, and avoid influence on normal life and production, and specifically, the rainwater pipe channel 400 comprises pipelines such as street rainwater branch pipes, factory rainwater branch pipes, street rainwater branch pipes and urban rainwater trunk pipes. After raining, the rainwater on the ground forms surface runoff, is discharged into a rainwater port arranged on the road surface, flows into the rainwater pipe duct 400 after confluence, and the water passing cabin 100 is an intermediate point of a way of the rainwater in the flowing process along the rainwater pipe duct 400. This application is through offering first rain apotheca 200 in crossing water cabin 100 one side, and the first rain that flows through rainwater pipe 400 in the initial stage of raining carries out the ration to be collected. After the quantitative collection is completed, the water inlet 111 of the initial rain storage chamber 200 is automatically closed by water power, and later-stage relatively clean rainwater flows through the water passing cabin 100 and then is collected into the rainwater pipe duct 400.

Fig. 1 shows a cross-sectional view of the primary rain collection and drainage system provided herein, and with reference to fig. 1, the direction perpendicular to the plane of the drawing is the direction of flow of rain water in the rain water canals 400 and in the water chamber 100. The first rain storage chamber 200 is arranged at one side of the water passing cabin 100, a water inlet 111 is formed in the side wall where the water passing cabin 100 is connected with the first rain storage chamber 200, the first rain storage chamber 200 is communicated with the water passing cabin 100 through the water inlet 111, and rainwater can flow into the first rain storage chamber 200 through the water inlet 111. A float 140 is arranged in the water chamber 100, and a gate 150 is connected below the float 140. The float 140 is less dense than water, and when rain water flows through the water compartment 100, the float 140 floats on the water surface and drives the gate 150 to move upward along with the rise of the water surface.

Note that the shutter 150 has a first state in which it is positioned below the water inlet 111 and a second state in which it completely shields the water inlet 111. When no rainwater flows through the water compartment 100, the gate 150 is in the first state, i.e. under gravity below the water inlet 111, and the water inlet 111 is in the open state. After raining, surface runoff at the early stage of rainfall is collected in the rainwater conduit 400 and flows into the water compartment 100, and flows into the initial rain storage chamber 200 through the opened water inlet 111 for collection. As the rainfall increases, the water level in the overflow compartment 100 rises, the buoy 140 rises continuously with the rise of the water level under the action of buoyancy and drives the gate 150 to move upwards until the water level rises to the second state, that is, the gate 150 completely shields the water inlet 111, the rainwater stops flowing into the primary rainwater storage chamber 200, and the quantitative collection process of the primary rainwater is completed.

Before the gate 150 moves to the second state, i.e. before the water inlet 111 is closed, the rainwater flowing through the water passing chamber 100 is the initial rainwater, and the initial rainwater flows into the initial rainwater storage chamber 200 through the water inlet 111 to be collected. As the rainfall progresses, the rainfall amount increases continuously, the content of pollutants in the rainwater decreases gradually, and in the process, the gate 150 is driven by the buoy 140 to ascend from the first state to the second state. The shutter 150 is moved to the second position to fully cover the inlet 111, and the rainwater flowing through the water compartment 100 is relatively clean later rainwater, and the rainwater directly flows through the water compartment 100 and flows into the rainwater conduit 400 again for rainwater collection.

Further, when the float 140 moves the gate 150 to the second position, it is stopped by a baffle (not shown) disposed on the side wall 110 of the aquarium above the water inlet 111 and no longer floats with the rising liquid level in the aquarium 100. The liquid level in the aquarium 100 passes through the gate 150, and the gate 150 is pressed against the side wall 110 of the aquarium under the action of the water pressure to maintain the second state, i.e., to completely shield the water inlet 111. After the rain falls and stops, the rain water in the rain water pipe duct 400 is gradually emptied, the liquid level in the water passing cabin 100 also gradually falls, when the liquid level is lowered to be lower than the lowest end of the gate 150, the water pressure acting on the gate 150 disappears, the gate 150 freely falls under the action of gravity, the second state is changed into the first state again, and the first state falls back to the lower part of the water inlet 111, so that the preparation is made for collecting the initial rain in the next rainfall.

In the first rain collecting and discharging system provided by the application, the first rain collected in the first rain storage chamber 200 is automatically discharged into the sewage pipe through the siphon action water power for treatment. The siphon tube 300 uses the siphon principle, and can empty the primary rain collected in the primary rain storage chamber 200 without an external force. The siphonage is caused by the liquid intermolecular attraction and potential energy difference, i.e. the water is lifted and then flows to the lower part by utilizing the pressure difference of the water column. Because the water surface of the pipe orifice bears different atmospheric pressures, the water flows from the side with high pressure to the side with low pressure until the atmospheric pressures on the two sides are equal, the water surface of the container becomes the same height, and the water stops flowing. When liquid is extracted by using the siphon principle, the liquid level at the water inlet end needs to be higher than the liquid level at the water outlet end, gas in the siphon pipe needs to be extruded at the beginning to enable the liquid to be filled in the pipe body, and then 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 are the same.

Referring to fig. 1, the present application provides an initial rain collection and discharge system in which a siphon tube 300 includes a water inlet section 310, a water outlet section 320, and a connecting section 330 between the water inlet section 310 and the water outlet section 320. The connection section 330 penetrates through the sidewall of the primary rain storage chamber 200, such that the water inlet section 310 of the siphon tube 300 is located in the primary rain storage chamber 200, one end of the water inlet section 310 extends into the bottom of the primary rain storage chamber 200, and the water 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 height of the primary rain storage chamber 200 is higher than that of the sewage pipe. Furthermore, the end of the water inlet section 310 away from the connecting section 330 is a water inlet end 311, the water inlet end 311 extends into the bottom of the primary rain storage chamber 200, the end of the water outlet section 320 away from the connecting section 330 is a water outlet end 321, and the water outlet end 321 extends into the sewage pipe and is immersed under the liquid level in the sewage pipe.

It should be noted that, in the present application, by designing the size of the water inlet 111 and the connection relationship between the float 140 and the gate 150, when the gate 150 moves from the first state to the second state under the driving of the float 140, the water level in the initial rain storage chamber 200 is higher than the highest point of the connection section 330, so as to ensure the occurrence of the siphon phenomenon. When the liquid level in the first rain storage chamber 200 is higher than the water inlet end 311, the rainwater flows into the water inlet section 310 through the water inlet end 311, and the liquid level of the water inlet section 310 is consistent with the liquid level in the first rain storage chamber 200. As the initial rain amount flowing from the inlet 111 increases, the liquid level in the initial rain storage chamber 200 rises continuously, and the liquid level in the water inlet section 310 also rises. When the liquid level in the initial rain storage chamber 200 rises to be higher than the highest point of the connection section 330, the rain water in the siphon tube 300 rises to fill the water inlet section 310 and the connection section 330, the rain water in the connection section 330 flows out from the water outlet section 320 under the action of gravity and fills the water outlet section 320, the process of emptying the gas in the siphon tube 300 is completed, and the siphon phenomenon is triggered. After the siphon phenomenon occurs, the liquid in the siphon tube 300 automatically flows from the water inlet end 311 to the water outlet end 321, and the primary rain collected in the primary rain storage chamber 200 is gradually discharged, because the height of the primary rain storage chamber 200 is higher than that of the sewage pipe, the height of the water inlet end 311 is always higher than that of the water outlet end 321, and the siphon phenomenon will continue until the liquid in the primary rain storage chamber 200 is emptied.

Further, in an 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, when the gate 150 is moved from the first state to the second state by the drive of the float 140, the height of the water level in the initial rain storage chamber 200, which is higher than the highest point of the connection section 330, is 50mm, so as to ensure that the liquid level stored in the initial rain storage chamber 200 can maintain the stable siphon phenomenon after the gate 150 is closed.

Further, referring to fig. 1, in an embodiment of the present invention, a groove 210 is dug in the bottom wall of the primary rain storage chamber 200 for the water inlet 311 of the siphon 300 to extend into. By digging the groove 210 at the bottom of the first rain storage chamber 200, it can be ensured that the water inlet end 311 of the siphon tube 300 is always immersed under the water surface along with the decrease of the liquid level in the first rain storage chamber 200, and the siphon phenomenon is ensured to continuously and stably occur until the back of all liquid in the first rain storage chamber 200 is emptied.

In one embodiment of the present application, the buoy 140 is connected to the gate 150 by a rope, and two ends of the rope are fixed to the buoy 140 and the gate 150, respectively. After the initial rain flows into the water passing cabin 100, the buoy 140 floats on the water surface under the action of buoyancy, and as the water level in the water passing cabin 100 rises, the buoy 140 gradually moves upwards, gradually tightens the rope, and pulls the gate 150 to move upwards through the rope after the rope is tightened. The connection between the float 140 and the gate 150 may also take other forms, such as a tie rod connection, etc., which can be used to move the gate 150 from the first state to the second state.

In an embodiment of the present invention, the water inlet 111 is disposed at the bottom of the side wall 110 of the water passing chamber, and the bottom wall 120 of the water passing chamber is disposed with an accommodating slot 121 for providing an accommodating space for the gate 150 in the first state. The lower the water inlet 111 is opened, the earlier the initial rain starts to be collected, and the initial rain with high early pollutant content can be collected into the initial rain storage chamber 200 as much as possible by opening the water inlet 111 at the bottom of the side wall 110 of the water passing cabin. Referring to fig. 1, in the present application, a grid 112 is installed at a water inlet 111 for filtering large solid contaminants, such as branches and dead leaves, mixed in the primary rain, and reducing the burden of the post-maintenance of the primary rain storage chamber 200.

Fig. 2 shows a plan view of the primary rain collecting and draining system provided in the present application, and referring to fig. 2, a water passing trough 130 is provided on the bottom wall 120 of the water passing compartment, and the water passing trough 130 includes a first trough 131 and a second trough 132 which are in cross communication with each other. Referring to fig. 2, the second flow groove 132 is oriented in parallel with the direction of rainwater flow in the water passing compartment 100, i.e., the direction indicated by the arrow in fig. 2. The end of the first flow groove 131 is communicated with the water inlet 111, the first flow groove 131 is communicated with the second flow groove 132 in a crossing manner, and the second flow groove 132 is divided into a water inlet groove 1321 and a water outlet groove 1322 by the first flow groove 131, wherein the water inlet groove 1321 is positioned at one side of the rainwater flowing into the water passing chamber 100, and the water outlet groove 1322 is positioned at one side of the rainwater flowing out of the water passing chamber 100.

The overflow trough 130 is formed in the bottom wall 120 of the overflow compartment for draining water when the level of liquid in the overflow compartment 100 is low and the flow rate of water is low. In the first aspect, during the initial stage of rainfall, the flow rate of rainwater is low, and a small amount of initial rainwater flows into the water compartment 100 from the rainwater conduit 400 through the water inlet slot 1321 of the second flow slot 132. When the initial rain reaches the intersection of the first flow groove 131 and the second flow groove 132, the initial rain flows to the water inlet 111 and flows into the initial rain storage chamber 200 under the guidance of the first flow groove 131, so that the initial rain is collected. Compared with the case that the initial rain flows directly in the overflow compartment 100, the overflow trough 130 can guide more initial rain to flow to the initial rain storage chamber 200, and the initial rain with higher pollutant content is mixed into the later rain as much as possible. In the second aspect, after the rainfall is finished, the rainwater in the rainwater conduit 400 is gradually drained, and when the liquid level in the water compartment 100 drops to a level lower than the water flow groove 130, the rainwater in the water flow groove 130 flows in the direction defined by the first flow groove 131 and the second flow groove 132. Before the rainwater is completely drained, a part of rainwater is left in the first flow groove 131, the end part of the first flow groove 131 is communicated with the water inlet 111, and the part of residual rainwater can still press the gate 150 to keep the gate in the second state (namely the state of closing the water inlet 111), so that the clean later rainwater is prevented from flowing into the initial rainwater storage chamber 200. The drainage effect of the water flowing groove 130 at the end of rainfall can improve the utilization rate of later-stage rainwater, and reduce the occupied space of the later-stage rainwater flowing into the first rain storage chamber 200, so that the collection amount of the first rain is less than the design value in the next rainfall.

In the present application, the widths of the inlet slot 1321 and the outlet slot 1322 of the second flow slot 132 are designed to be different, and the width of the inlet slot 1321 is greater than the width of the outlet slot 1322. For example, in an embodiment of the present application, the width of the inlet slot 1321 of the second flow slot 132 is designed to be 250mm, the width of the outlet slot 1322 is designed to be 50mm, and the width of the first flow slot 131 is designed to be 200mm. The width of the water inlet slot 1321 is larger than that of the water outlet slot 1322, the amount of rainwater flowing into the water flowing slot 130 is larger than that flowing out in the same time, more rainwater is guided to flow along the direction of the first flow slot 131, the retention time of the rainwater in the first flow slot 131 is relatively prolonged, and the drainage effect of the water flowing slot 130 is further improved. In addition, the design of the water outlet slot 1322 can promote the rainwater in the water flowing slot 130 to be completely drained after the rainfall is finished, so that no residual rainwater in the first flowing slot 131 applies pressure to the gate 150, the gate 150 is ensured to automatically fall under the action of gravity, and the initial rainwater collecting and discharging system can normally work in the next rainfall. It should be noted that the widths of the first flow channel 131, the water inlet channel 1321 and the water outlet channel 1322 can be designed to be other values, which is not illustrated herein.

In the present application, the opening height of the overflow chute 130 is designed to be the same as the opening height of the water inlet 111. By way of example, in the embodiment of the present application, the water inlet 111 is formed as a square hole, and the plane size of the water inlet 111 is designed to be 150mm × 150mm, that is, the opening height of the water inlet 111 on the side wall 110 of the water passing chamber is 150mm, and the opening height of the water passing groove 130 is also designed to be 150mm. Correspondingly, the height of the gate 150 should be larger than 150mm to completely shield the water inlet 111 in the second state. It should be noted that the shape and the plane size of the water inlet 111 can be adjusted according to specific situations, and the application is not limited in this application.

Referring to fig. 1 and 2, in the present application, the number of the first rain storage chambers 200 is 2, and 2 first rain storage chambers 200 are distributed on both sides of the water passing cabin 100 perpendicular to the flowing direction of the rainwater. At the moment, the side walls of the two sides of the water passing cabin 100 are both provided with water inlets 111 for communicating the primary rain storage chambers 200 of the two sides; the water inlets 111 on both sides are provided with gates 150 and buoys 140 connected with the gates 150, and are used for realizing the hydraulic automatic opening and closing of the water inlets 111; the two ends of the first trough 131 are respectively communicated with the water inlets 111 on the two sides, and the primary rain is guided into the primary rain storage chambers 200 on the two sides; siphon 300 is disposed in the first rain storage chamber 200 at both sides for hydraulic automatic discharge of the first rain collected in the first rain storage chamber 200 to a sewage pipe for subsequent treatment.

Fig. 2 is a schematic plan view of the primary rain collecting and draining system provided in the present application, and referring to fig. 2, the primary rain storage chamber 200 in the present application should be designed in a plan view according to the expected collection amount of primary rain and the actual arrangement of the pipelines in the cross section of the road. The width dimension of the initial rain collecting and discharging system perpendicular to the rainwater flowing direction (arrow direction in fig. 2) is limited to be more than 1.1 m, and the maximum width ensures that the minimum distance between the initial rain storage chamber 200 and other municipal pipelines and underground buildings meets the national standard.

It should be noted that the initial rain collecting and draining system provided by the present application may be prefabricated in a factory and then installed at a node where the rain water pipe 400 flows through, or may be fabricated by digging on site. When the urban terrain is limited, a plurality of small-sized primary rain collecting and draining systems can be distributed away from the extension direction of the rainwater raceway 400 to improve the primary rain collecting efficiency. When road conditions are met, the longitudinal length of the initial rain collecting and draining system may extend in the direction of the storm water raceway 400, forming a gallery-type initial rain collecting and draining system.

To sum up, the first rain collecting and discharging system provided by the application has the following advantages:

(1) The construction form is nimble, can disperse according to the road condition and set up, need not to occupy the urban construction land, improves the utilization ratio of urban municipal construction land.

(2) The initial rain holding volume has a large variation range, can be constructed together with the rainwater pipe duct 400, and has low construction difficulty and low construction cost.

(3) The collection and discharge process of the initial rain is automatically realized by waterpower, and the use and maintenance cost is low.

(4) The overflow chute 130 plays a role in guiding the initial rain when the flow is less, controls the collection amount and the collection time period of the initial rain, improves the concentration of pollutants in the collected initial rain, and reduces the burden of sewage treatment.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. An initial rain collection and drainage system, comprising:

the water passing cabin is used for being communicated with the rainwater pipe duct, a water inlet and a baffle are formed in the side wall of the water passing cabin, and the baffle is located above the water inlet;

the primary rain storage chamber is positioned on one side of the water passing cabin and communicated with the water passing cabin through the water inlet;

the floating cylinder is positioned in the water passing cabin, and the baffle is used for limiting the rising height of the floating cylinder;

the gate is connected with the buoy, the gate has a first state below the water inlet and a second state completely shielding the water inlet, and the buoy is used for driving the gate to move from the first state to the second state;

the siphon comprises a water inlet section, a water outlet section and a connecting section positioned between the water inlet section and the water outlet section, wherein the connecting section penetrates through the side wall of the primary rain storage chamber, one end of the water inlet section extends into the bottom of the primary rain storage chamber, the water outlet section is positioned outside the primary rain storage chamber and is used for being communicated with a sewage pipe, and 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 line in the initial rain storage chamber is higher than the highest point of the connecting section.

2. The primary rain collecting and draining system according to claim 1 wherein said water inlet opening is formed in a bottom portion of a side wall of said overflow compartment, and a receptacle is formed in a bottom wall of said overflow compartment, said gate being positioned in said receptacle when said gate is in said first position.

3. The primary rain collection and discharge system according to claim 1, wherein the bottom wall of the overflow compartment is provided with an overflow trough, the overflow trough comprises a first trough and a second trough which are communicated with each other in a crossing manner, the end of the first trough is communicated with the water inlet, and the second trough is parallel to the water flow direction in the overflow compartment.

4. The primary rain collecting and draining system according to claim 3 wherein the second flow channel is divided by the first flow channel into an inlet channel on the side of the overflow compartment from which rain water flows in and an outlet channel on the side of the overflow compartment from which rain water flows out, the inlet channel having a channel width greater than the outlet channel.

5. The primary rain collection and drainage system of claim 4, wherein the inlet channel has a channel width of 250mm and the outlet channel has a channel width of 50mm.

6. The primary rain collecting and draining system of claim 3, wherein the first gutter has a gutter width of 200mm.

7. The primary rain collection and drainage system of claim 3, wherein the height of the overflow trough is the same as the opening height of the water inlet.

8. The primary rain collection and drainage system of claim 1, wherein the bottom wall of the primary rain storage chamber is formed with a recess, and one end of the water inlet section extends into the recess.

9. The primary rain collecting and draining system of claim 1, wherein the number of said primary rain storage chambers is 2, and 2 of said primary rain storage chambers are distributed on both sides of said water passing compartment perpendicular to the flow direction of the rain water.

10. The primary rain collecting and draining system of claim 1, wherein the primary rain collecting and draining system has a width dimension perpendicular to the direction of flow of rain water of greater than 1.1 meters.

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