CN115467389B - First rain collection and discharge system - Google Patents
First rain collection and discharge systemInfo
- Publication number
- CN115467389B CN115467389B CN202210672089.0A CN202210672089A CN115467389B CN 115467389 B CN115467389 B CN 115467389B CN 202210672089 A CN202210672089 A CN 202210672089A CN 115467389 B CN115467389 B CN 115467389B
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- China
- Prior art keywords
- water
- rain
- water inlet
- primary
- storage chamber
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Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/20—Siphon pipes or inverted siphons
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/02—Shut-off devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Sewage (AREA)
Abstract
The invention discloses a primary rain collecting and discharging system which is used for communicating a water passing cabin of a rainwater pipe canal with a primary rain storage chamber positioned at one side of the water passing cabin, wherein the water passing cabin and the primary rain storage chamber are communicated through a water inlet arranged on the side wall of the water passing cabin. When the rain starts, the gate is in a first state, and the initial rain flows into the initial rain storage chamber through the water inlet for collection. Along with the increase of rainfall, the liquid level in the water cabin rises, the pontoon drives the gate to move upwards to a second state and then stops, and the gate keeps shielding the water inlet under the action of water pressure to finish quantitative collection of initial rain. A siphon is arranged in the primary rain storage chamber, a water inlet section of the siphon stretches into the bottom of the primary rain storage chamber, a water outlet section is used for communicating 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 line in the primary rain storage chamber is higher than the highest point of the siphon connecting section, the siphon phenomenon is triggered, and the primary rain automatically flows to the sewage pipe through the siphon pipe until the sewage pipe is emptied. The system can reduce construction, operation and maintenance costs, and meanwhile, no new construction land is needed.
Description
Technical Field
The invention relates to the technical field of rainwater collection and utilization, in particular to a primary rainwater collection and discharge system.
Background
The initial rainwater (primary rainwater for short) is the rainwater at the initial stage of rainfall, and generally refers to the rainfall with the surface runoff formed on the ground with the thickness of 10-15 mm. The pollution level of the primary rain is generally higher than that of common urban sewage. If the primary rain is directly discharged into a river or naturally bears water, the water is polluted, so that the primary rain must be collected and treated. At present, a disposal mode of discarding the primary rain runoff is adopted, a interception pipe network system is adopted to intercept the primary rain, and the interception pipe network system is utilized to intercept the primary rain to a sewage pipeline and then convey the sewage pipeline to a sewage treatment plant for purification treatment. The primary rain collection facility in the related art is mainly a large-scale regulation pool, the water collecting area of the large-scale regulation pool is large, the distance difference between the position of the regulation pool and different primary rain generation places is large, the time that the primary rain reaches the regulation pool is different, after the primary rain generated at the place far away from the regulation pool reaches the regulation pool, a large amount of non-primary rain generated at the place close to the regulation pool is mixed in the regulation pool, the collected rainwater in the regulation pool usually contains rainwater at various periods, the collected primary rain pollution concentration is not high, and the burden is increased for the treatment of the later primary rain. In addition, large reservoirs typically occupy a large area, require the provision of drainage pumps and flushing equipment, and are costly to construct, use, and maintain.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a primary rain collecting and discharging system which can automatically collect and discharge primary rain quantitatively by waterpower and has lower construction and use cost.
According to an embodiment of the invention, a primary rain collecting and discharging system comprises:
The water passing cabin is used for communicating the rainwater pipe canal, 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 at one side of the water passing cabin and is communicated with the water passing cabin through the water inlet;
the pontoon is positioned in the water passing cabin, and the baffle is used for limiting the rising height of the pontoon;
The gate is connected with the pontoon, the gate has a first state positioned below the water inlet and a second state completely shielding the water inlet, and the pontoon 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 stretches 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 communicating a sewage pipe, and the height of the sewage pipe is lower than that of the primary rain storage chamber;
When the gate is moved 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 primary rain collecting and discharging system provided by the embodiment of the application has the advantages that the primary rain collecting and discharging system at least comprises the water passing cabin and the primary rain storage chamber, wherein the water passing cabin is communicated with the rain water pipe canal and is a node through which rain water flows in the flowing process along the rain water pipe canal. The first rain reservoir is located on one side of the water passing cabin, and the first rain reservoir and the water passing cabin are communicated through a water inlet formed in the side wall of the water passing cabin. When the rain starts, the gate is in a first state, and the primary rain flows into the water passing cabin through the rainwater pipe canal and flows into the primary rain storage chamber through the water inlet for primary rain collection. The liquid level in the water cabin gradually rises along with the increase of rainfall, and the pontoon rises along with the increase of the rainfall under the buoyancy effect and drives the gate connected with the pontoon to move upwards. When the gate moves to the second state, the pontoon is blocked by the baffle plate arranged on the side wall of the water passing cabin and does not ascend any more, and the gate keeps the second state under the action of water pressure, so that quantitative collection of the initial rain is completed. The siphon is arranged in the primary rain storage chamber, the siphon 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 stretches into the bottom of the primary rain storage chamber, and the water outlet section is positioned outside the primary rain storage chamber and is used for communicating with a sewage pipe. The sewage pipe is 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, a water line in the primary rain storage chamber is higher than the highest point of the connecting section, primary rain flows into the water inlet section and the connecting section through one end of the water inlet section, finally flows into the sewage pipe from the water outlet section, so that air in the siphon is emptied, and the siphon phenomenon is triggered. Under the siphon action, the primary rain automatically flows from the water inlet section to the water outlet section and flows to the sewage pipe until the primary rain collected in the primary rain storage chamber is emptied. The application can realize the automatic closing of the water inlet after the quantitative collection of the initial rain, and the initial rain collected in the initial rain storage chamber can be automatically emptied through the siphon action, thereby greatly reducing the construction, operation and maintenance costs of the initial rain collection and discharge system. Meanwhile, the initial rain volume of the system is adjustable, the system can be flexibly arranged in a road range along a rain pipe channel, and a new construction land is not required.
According to some embodiments of the invention, the water inlet is formed at the bottom of the side wall of the water passing cabin, and the bottom wall of the water passing cabin is provided with a containing groove, and when the gate is in the first state, the gate is located in the containing groove.
According to some embodiments of the invention, the bottom wall of the water passing cabin is provided with a water passing groove, the water passing groove comprises a first flow groove and a second flow groove which are communicated in a cross mode, the end portion of the 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 cabin.
According to some embodiments of the invention, the second launder is divided by the first launder into a water inlet and a water outlet, the water inlet is located on one side of the water compartment where rainwater flows in, the water outlet is located on one side of the water compartment where rainwater flows out, and the water inlet has a greater groove width than the water outlet.
According to some embodiments of the invention, the trough width of the water inlet trough is 250mm and the trough width of the water outlet trough is 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 water flow groove is the same as the opening height of the water inlet.
According to some embodiments of the invention, the bottom wall of the primary rain storage chamber is provided with a groove, and one end of the water inlet section extends into the groove.
According to some embodiments of the invention, the number of the primary rain storage chambers is 2, and the 2 primary 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 initial rain collection drainage system has a width dimension perpendicular to the direction of rain flow of greater than 1.1 meters.
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 foregoing and/or additional aspects and advantages of the invention will be apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic cross-sectional view of a primary rain collection drainage system according to an embodiment of the present invention;
Fig. 2 is a schematic plan view of a primary rain collecting and discharging system according to an embodiment of the present invention.
Reference numerals are a water passing cabin 100, a water passing cabin side wall 110, a water inlet 111, a grid 112, a water passing cabin bottom wall 120, a containing groove 121, a water passing launder 130, a first launder 131, a second launder 132, a water inlet 1321, a water outlet 1322, a pontoon 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 pipe 400.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The terms first, second and the like in the description and in the claims and in the above-described figures, 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 references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, only for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, mounting, connection, etc. should be construed broadly and may be fixed or movable, or may be detachably or non-detachably or integrally connected, or may be directly or indirectly connected via an intermediate medium, or may be in communication with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The application provides a primary rain collecting and discharging system, which comprises a water passing cabin 100, a primary rain storage room 200, a pontoon 140, a gate 150 and a siphon pipe 300. The front and rear ends of the water passing compartment 100 are respectively communicated with a rainwater pipe 400 of municipal pipes, and the rainwater pipe 400 is a pipe for collecting and transporting rainwater for timely draining ground rainwater. The rainwater pipe 400 can prevent the phenomenon of surface water accumulation in urban living areas and industrial enterprise areas and avoid affecting normal life and production, and specifically, the rainwater pipe 400 comprises pipelines such as a neighborhood rainwater branch pipe, a factory site rainwater branch pipe, a street rainwater branch pipe, a town rainwater main pipe and the like. After rain, the rainwater on the ground forms surface runoff, is discharged into a rainwater inlet arranged on the road surface, flows into the rainwater pipe channel 400 after converging, and the water passing cabin 100 is a middle point of a path in the rainwater flowing process along the rainwater pipe channel 400. The present application quantitatively collects the initial rain flowing through the rain pipe 400 in the initial period of rain by opening the initial rain storage chamber 200 at one side of the water passing chamber 100. After the quantitative collection is completed, the water inlet 111 of the primary rain storage chamber 200 is automatically closed hydraulically, and later-period clean rainwater flows through the water passing cabin 100 and then continues to flow into the rainwater pipe channel 400.
Fig. 1 is a cross-sectional view of the initial rain collecting and draining system according to the present application, and referring to fig. 1, a direction perpendicular to the paper surface is a direction in which rainwater flows in the rainwater pipe 400 and the water passing chamber 100. The primary rain storage chamber 200 is arranged on one side of the water passing chamber 100, a water inlet 111 is arranged on the side wall of the water passing chamber 100 connected with the primary rain storage chamber 200, the primary rain storage chamber 200 is communicated with the water passing chamber 100 through the water inlet 111, and rainwater can flow into the primary rain storage chamber 200 through the water inlet 111. A pontoon 140 is arranged in the water chamber 100, and a gate 150 is connected below the pontoon 140. The pontoon 140 has a density smaller than that of water, and when rainwater flows in the water compartment 100, the pontoon 140 floats on the water surface and moves the gate 150 upward as the water surface rises.
The shutter 150 has a first state located below the water inlet 111 and a second state of completely shielding the water inlet 111. When no rain water passes through the water compartment 100, the gate 150 is in the first state, i.e., under the gravity, below the water inlet 111, and the water inlet 111 is in an open state. After rain, the surface runoff at the early stage of the rain falls into the rain pipe 400 and flows into the water passing chamber 100, and flows into the primary rain reservoir 200 through the open water inlet 111 to be collected. Along with the increase of the rainfall, the water surface in the water compartment 100 rises, the pontoon 140 continuously rises along with the rise of the water surface under the action of buoyancy and drives the gate 150 to move upwards until the water inlet 111 is completely shielded by the gate 150, the rainwater stops flowing into the primary rain storage chamber 200, and the quantitative collection process of the primary rain is completed.
Before the gate 150 moves to the second state, i.e., before the water inlet 111 is closed, all of the rainwater flowing through the water compartment 100 is initial rainwater, and this portion of the rainwater flows into the initial rainwater storage chamber 200 through the water inlet 111 to be collected. Along with the continuous rainfall process, the rainfall is increased, the content of pollutants in the rainwater is gradually reduced, and in the process, the gate 150 is driven by the pontoon 140 to move from the first state to the second state. When the gate 150 is moved to the second state, it is lifted to a position where it completely shields the water inlet 111, and at this time, the rainwater flowing through the water compartment 100 is relatively clean late-stage rainwater, and this part of the rainwater directly flows through the water compartment 100 and flows again into the rainwater pipe 400 to collect rainwater.
Further, when the pontoon 140 moves the gate 150 to the second state, it is blocked by a baffle (not shown) disposed on the water inlet 111 of the water chamber sidewall 110, and does not float continuously with the rise of the liquid level in the water chamber 100. The liquid surface in the water compartment 100 is covered by the gate 150, and the gate 150 is pressed against the water compartment sidewall 110 by the water pressure to maintain the second state, i.e., to completely shield the water inlet 111. After the rain drops, the rainwater in the rainwater pipe 400 is gradually emptied, the liquid level in the water cabin 100 is gradually lowered, when the liquid level is lowered below 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, is changed from the second state to the first state again, falls back to the lower part of the water inlet 111, and is ready for collecting the initial rain in the next rainfall.
In the initial rain collecting and discharging system provided by the application, the initial rain collected in the initial rain storage chamber 200 is automatically discharged into the sewage pipe for treatment by siphon action. The siphon tube 300 can empty the initial rain collected in the initial rain storage chamber 200 without external force using the siphon principle. The siphon phenomenon is caused by the attraction and potential energy difference between liquid molecules, namely, water is raised by the pressure difference of water column and then flows to the lower part. Because the water surface of the pipe orifice bears different atmospheric pressures, water flows from the side with high pressure to the side with low pressure until the atmospheric pressures at the two sides are equal, the water surface of the container becomes the same height, and the water stops flowing. When the siphon principle is utilized to extract liquid, the liquid level of the water inlet end is higher than the liquid level of the water outlet end, gas in the siphon pipe is extruded to fully fill 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 of the water inlet end and the water outlet end become the same height.
Referring to fig. 1, in the initial rain collecting and discharging system provided by the present application, a siphon 300 includes a water inlet section 310, a water outlet section 320, and a connection section 330 between the water inlet section 310 and the water outlet section 320. The connection section 330 passes through the side wall of the primary rain storage chamber 200, so that the water inlet section 310 of the siphon 300 is positioned 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 positioned outside the primary rain storage chamber 200. The outlet section 320 communicates with a sewer pipe (not shown) and the initial rain reservoir 200 is located at a higher level than the sewer pipe. Further, the water inlet end 311 is located at one end of the water inlet section 310 far away from the connecting section 330, the water inlet end 311 extends into the bottom of the primary rain storage chamber 200, the water outlet end 321 is located at one end of the water outlet section 320 far away from the connecting section 330, 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 pontoon 140 and the gate 150, when the gate 150 is moved from the first state to the second state under the driving of the pontoon 140, the water level line in the initial rain storage chamber 200 is higher than the highest point of the connection section 330, so as to ensure occurrence of the siphon phenomenon. When the liquid level in the initial rain reservoir 200 is higher than the water inlet 311, rainwater flows into the water inlet 310 through the water inlet 311, and the liquid level in the water inlet 310 is consistent with the liquid level in the initial rain reservoir 200. As the amount of initial rain flowing in from the water inlet 111 increases, the liquid level in the initial rain reservoir 200 increases and the liquid level in the water inlet section 310 increases. When the liquid level in the initial rain reservoir 200 rises to a level higher than the highest point of the connection section 330, the rainwater in the siphon 300 has risen to fill the water inlet section 310 and the connection section 330, and the rainwater in the connection section 330 flows out from the water outlet section 320 and fills the water outlet section 320 under the action of gravity, thereby completing the process of evacuating the gas in the siphon 300 and triggering the occurrence of the siphon phenomenon. After the siphoning phenomenon occurs, the liquid in the siphon 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, and the height of the water inlet end 311 is always higher than the height of the water outlet end 321 because the height of the primary rain storage chamber 200 is higher than the height of the sewage pipe, so that the siphoning phenomenon is continuously performed until the liquid in the primary rain storage chamber 200 is stopped after being emptied.
Further, in an embodiment of the present application, by designing the size of the water inlet 111 and the connection relationship between the pontoon 140 and the gate 150, it is possible to realize that the height of the water line in the initial rain storage chamber 200 higher than the highest point of the connection section 330 is 50mm when the gate 150 is moved from the first state to the second state under the driving of the pontoon 140, so as to ensure that the liquid level stored in the initial rain storage chamber 200 can maintain the siphon phenomenon stably after the gate 150 is closed.
Further, referring to fig. 1, in an embodiment of the present application, a recess 210 is formed in the bottom wall of the initial 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 initial rain reservoir 200, it is ensured that the water inlet 311 of the siphon 300 is always submerged under the water surface as the liquid level in the initial rain reservoir 200 is lowered, and the siphon phenomenon is ensured to continuously and stably occur until the whole liquid in the initial rain reservoir 200 is emptied and stopped.
In one embodiment of the present application, the pontoon 140 and the gate 150 are connected by a rope, and both ends of the rope are fixed to the pontoon 140 and the gate 150, respectively, by way of example. After the initial rain flows into the water passing cabin 100, the pontoon 140 floats on the water surface under the buoyancy effect, and moves upwards gradually along with the rising of the water level in the water passing cabin 100, the rope is tensioned gradually, and the gate 150 is pulled to move upwards through the rope after the rope is tensioned. The connection between the pontoon 140 and the gate 150 may take other forms, such as a pull rod connection, etc., to enable the gate 150 to be pulled from the first state to the second state, although this is not a limitation of the present application.
In an embodiment of the present application, the water inlet 111 is formed at the bottom of the water chamber sidewall 110, and the accommodating groove 121 is formed on the bottom wall 120 of the water chamber, so as to provide an accommodating space for the gate 150 in the first state. The lower the water inlet 111 is opened, the earlier the initial rain collection is started, and the water inlet 111 is opened at the bottom of the water compartment sidewall 110, so that the initial rain with higher early contaminant content can be collected into the initial rain storage chamber 200 as much as possible. Referring to fig. 1, in the present application, a grid 112 for filtering large solid contaminants doped in the initial rain, such as branch dead leaves, etc., is installed at a water inlet 111, thereby reducing the burden of the post-maintenance of the initial rain storage chamber 200.
Fig. 2 is a plan view showing the initial rain collecting and draining system provided by the present application, and referring to fig. 2, a water passing groove 130 is provided on a bottom wall 120 of a water passing cabin, and the water passing groove 130 includes a first groove 131 and a second groove 132 which are cross-connected. Referring to fig. 2, the second flow groove 132 is oriented parallel to the direction of the rainwater flow in the water compartment 100, i.e., the direction indicated by the arrow in fig. 2. The end of the first flow channel 131 is communicated with the water inlet 111, the first flow channel 131 and the second flow channel 132 are in cross communication, the second flow channel 132 is divided into a water inlet channel 1321 and a water outlet channel 1322 by the first flow channel 131, wherein the water inlet channel 1321 is positioned at one side of the rainwater inflow water compartment 100, and the water outlet channel 1322 is positioned at one side of the rainwater outflow water compartment 100.
The water flow groove 130 is formed on the bottom wall 120 of the water flow chamber, and is used for playing a role in drainage when the liquid level in the water flow chamber 100 is low and the water flow rate is low. In the first aspect, at the initial stage of rainfall, the flow rate of rainwater is small, and a small amount of initial rainwater flows into the water compartment 100 from the rainwater pipe 400 via the water inlet tank 1321 of the second launder 132. When the primary rain reaches the intersection of the first runner 131 and the second runner 132, the primary rain is guided by the first runner 131 to flow toward the water inlet 111 and into the primary rain reservoir 200 to complete the primary rain collection. The water flow groove 130 can guide more initial rain to the initial rain reservoir 200 as compared with the initial rain directly flowing in the water flow chamber 100, so that the mixing of initial rain with high pollutant content into later-stage rain water is minimized. In the second aspect, after the end of the rainfall, the rainwater in the rainwater pipe 400 is gradually emptied, and when the liquid level in the overflow tank 100 drops below the height of the overflow tank 130, the rainwater in the overflow tank 130 flows in the direction defined by the first flow tank 131 and the second flow tank 132. Before the rainwater is completely emptied, part of the rainwater will be 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 the 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 cleaner late-stage rainwater is prevented from flowing into the primary rainwater storage chamber 200. The drainage effect of the water flow trough 130 at the end of rainfall can not only improve the utilization rate of the late-stage rainwater, but also reduce the occupation space of the late-stage rainwater flowing into the primary rainwater storage chamber 200, so that the primary rainwater collection amount is less than the design value in the next rainfall.
In the present application, the width of the water inlet 1321 and the width of the water outlet 1322 of the second water tank 132 are designed to be different, and the width of the water inlet 1321 is larger than the width of the water outlet 1322. By way of example, in one embodiment of the present application, the inlet slot 1321 of the second runner 132 is designed to have a slot width of 250mm, the outlet slot 1322 is designed to have a slot width of 50mm, and the first runner 131 is designed to have a slot width of 200mm. The width of the water inlet tank 1321 is larger than that of the water outlet tank 1322, and the amount of rainwater flowing into the water flow tank 130 is larger than that flowing out in the same time, so that more rainwater is guided to flow along the direction of the first flow tank 131, the stay time of the rainwater in the first flow tank 131 is relatively prolonged, and the drainage effect of the water flow tank 130 is further improved. In addition, the design of the water outlet tank 1322 can promote the complete drainage of the rainwater in the water flow tank 130 after the rainfall is finished, so that no residual rainwater in the first flow tank 131 presses the gate 150, the gate 150 can automatically fall under the action of gravity, and the primary rainwater collecting and discharging system can normally work when the next rainfall is finished. It should be noted that, the widths of the first flow channel 131, the water inlet channel 1321, and the water outlet channel 1322 may be designed to be other values, which are not illustrated herein.
In the present application, the opening height of the water flow groove 130 and the opening height of the water inlet 111 are designed to be the same value. For example, in an embodiment of the present application, the water inlet 111 is formed as a square hole, the plane dimension of the water inlet 111 is 150mm by 150mm, i.e. the opening height of the water inlet 111 on the water compartment sidewall 110 is 150mm, and the opening height of the water flow groove 130 is also 150mm. Correspondingly, the height of the shutter 150 should also be greater than 150mm to achieve complete shielding of the water inlet 111 when in the second state. The shape and the planar size of the water inlet 111 may be adjusted according to the specific situation, and the present application is not limited herein.
Referring to fig. 1 and 2, in the present application, the number of the primary rain storage chambers 200 is 2, and 2 primary rain storage chambers 200 are distributed on both sides of the water passing chamber 100 perpendicular to the flowing direction of the rainwater. At this time, water inlets 111 are formed on the side walls of the two sides of the water passing cabin 100 to communicate with the primary rain storage chambers 200 of the two sides, pontoons 140 connected with the gates 150 are respectively arranged at the water inlets 111 of the two sides to automatically open and close the water inlets 111, two ends of the first launder 131 are respectively communicated with the water inlets 111 of the two sides to drain the primary rain into the primary rain storage chambers 200 of the two sides, and siphons 300 are respectively arranged in the primary rain storage chambers 200 of the two sides to automatically drain the primary rain collected in the primary rain storage chambers 200 to a sewage pipe for subsequent treatment.
Fig. 2 is a schematic plan view of the initial rain collecting and discharging system according to the present application, and referring to fig. 2, the plan size of the initial rain storage chamber 200 according to the present application should be designed according to the expected collection amount of initial rain and the actual arrangement of the pipelines in the road cross section. The width dimension of the primary rain collecting and draining system perpendicular to the rainwater flowing direction (arrow direction in fig. 2) is defined to be larger than 1.1 m, and the minimum distance between the primary rain storage room 200 and other municipal pipelines and underground buildings is ensured to meet the national standard.
It should be noted that, the initial rain collecting and draining system provided by the application can be arranged at a certain node where the rain pipe 400 flows through after being prefabricated in a factory, and also can be manufactured by selecting a field digging mode. When urban terrain is limited, a plurality of small-sized primary rain collecting and discharging systems may be spaced apart along the extending direction of the rain pipe 400 to improve the primary rain collecting efficiency. When the road condition is satisfied, the longitudinal length of the primary rain collecting and discharging system may extend along the direction of the rain pipe 400, forming a corridor type primary rain collecting and discharging system.
In summary, the initial rain collecting and discharging system provided by the application has the following advantages:
(1) The construction form is flexible, can be discretely set according to road conditions, does not need to occupy urban construction land, and improves the utilization rate of the urban municipal construction land.
(2) The initial rain accommodation volume has large variation range, can be jointly constructed with the rainwater pipe 400, and has low construction difficulty and low construction cost.
(3) The hydraulic power automatically realizes the collection and discharge process of the initial rain, and the use and maintenance cost is low.
(4) The water flow groove 130 plays a role in guiding the primary rain when the flow quantity is small, controls the collection quantity and the collection period of the primary rain, improves the concentration of pollutants in the collected primary rain, and reduces the burden of sewage treatment.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (8)
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