Floating over water window, rain and sewage automatic shunt lock system and its application

Abstract

The present application belongs to the technical field of water pollution treatment, and relates to a floating overwater window capable of automatic switching, a rainwater and sewage automatic diversion gate system and application thereof. The flexible bypass and the floating overwater window are used to jointly constitute a pressure-inclination bypass of a main pipeline. In the process that the water flow changes from small to large and then from large to small, the system is used to bear the process of pressure increase and pressure decrease, the pressure-inclination bypass is automatically driven to automatically switch, a large amount of rainwater with good water quality is smoothly discharged from the pretreatment system, the problem that the treatment effect of high-concentration rainwater and sewage is limited by the system capacity is solved, and the whole design of the floating overwater window is energy-saving and emission-reducing. The floating overwater window can be automatically switched under zero energy consumption, and the possibility that the initial rainwater and sewage is effectively treated in situ by 100% is realized. The floating overwater window and the end gate assembly are linked through a traction mechanism, the rainwater with good water quality is discharged in time through the floating overwater window, and accurate collection of limited sewage is ensured to be treated in situ.

Description

Technical Field

[0001] This invention relates to the field of water pollution control technology, and in particular to a floating water passage window that can be automatically opened and closed, an automatic rainwater and sewage diversion gate system, and its application. Background Technology

[0002] Urban and rural domestic sewage, due to combined sewer overflows, causes initial stormwater and sewage discharge to affect the downstream urban rivers and rural ponds or lakes, resulting in black and smelly water or eutrophic water. The volume of mixed stormwater and sewage formed after the mixing of domestic sewage with large amounts of rainwater is so large that it far exceeds the design capacity of the planned sewage treatment plants in the region, making it difficult to implement unified collection and centralized treatment.

[0003] Currently, although municipal engineering projects implementing zero-direct-discharge interception and collection of sewage have been implemented to address the problem of combined sewer overflows in cities, some river water environment management projects known to the inventor reveal that municipal engineering facilities in certain areas remain incomplete. Not only is a significant proportion of combined sewer overflow outlets not renovated, but even those that have undergone construction and renovation still experience sewage overflow during initial rainwater runoff due to incomplete modifications, making further repairs difficult. The main reason for this phenomenon is that during the construction and renovation of municipal pipeline networks, there are problems with the connection between the main sewage interception and collection network and the branch pipes of various old residential areas. Construction units find it difficult to achieve 100% accurate connection to the complex underground pipe network system with incomplete drawings. Because river ecosystems are relatively fragile, even a single misconnection or omission in the pipe network can lead to downstream water quality exceeding standards.

[0004] Furthermore, based on experience and related experiments, the inventors learned that highly concentrated wastewater is only discharged into outlets within the first few minutes or tens of minutes of the initial rainwater runoff. Through investigation of the initial rainwater runoff from hundreds of different urban and rural sewage pipes, they found that in culverts with obvious wastewater soaking marks at the outlets, the darker, foul-smelling lines generally extended to less than one-third of the pipe's surface area. Given the scale of existing pretreatment systems, if highly concentrated rainwater runoff is collected in the initial stages before entering the river, the subsequent discharge of a large volume of better-quality rainwater into the pretreatment system will result in insufficient system capacity, causing the previously collected highly concentrated rainwater runoff to be squeezed out of the pretreatment system. This leads to insufficient retention time for the highly concentrated rainwater and poor treatment efficiency.

[0005] Therefore, there is an urgent need to propose a new technology for rainwater and sewage collection and pretreatment to overcome the problems mentioned above, such as the difficulty in modifying interceptor sewer outlets, incomplete modification, and the limitation of system capacity on the treatment effect of high-concentration rainwater and sewage. Summary of the Invention

[0006] The purpose of this invention is to provide a floating water passage window and an automatic rainwater and sewage diversion gate system that can be automatically opened and closed, and their application, so as to solve the problems of difficulty in modifying the intercepting sewage outlet, incomplete modification, and the limitation of system capacity on the treatment effect of high-concentration rainwater and sewage.

[0007] To achieve the above objectives, the present invention provides the following solution: On one hand, the present invention provides a floating water passage window, including an annular window frame that can float on the water surface, wherein the annular window frame contains a water passage window, and the annular window frame is used to be connected to the side of the main pipeline via a flexible bypass. The annular window frame can automatically switch between a floating state and a sinking state according to the changes in water pressure in the main pipeline, so as to realize the guidance and control of water flow in the main pipeline.

[0008] In some embodiments, the frame of the annular window is made of a hollow plastic tube, and any cross-sectional shape of the hollow plastic tube is circular or polygonal.

[0009] In some embodiments, the hollow plastic pipe is a PE pipe.

[0010] In some embodiments, the annular window frame is circular or polygonal in shape.

[0011] On the other hand, the present invention proposes an automatic stormwater and sewage diversion gate system, including a main sewage collection and diversion pipeline, a flexible bypass, and the aforementioned floating water passage window. The annular window frame is connected to the side of the main sewage collection and diversion pipeline through the flexible bypass. The inlet end of the main sewage collection and diversion pipeline is used to connect to the municipal stormwater and sewage mixed discharge outlet, and the outlet end of the main sewage collection and diversion pipeline is used to connect to the water treatment system.

[0012] In some embodiments, the inlet end of the main sewage collection pipeline is further provided with a discharge outlet adapter connection structure, wherein the discharge outlet adapter connection structure adopts one of structure one, structure two, structure three, and structure four, wherein: The structure includes a flexible connecting pipe and a clamp. The inlet end of the flexible connecting pipe can be connected to a discharge port in the form of a cement pipe or a corrugated pipe. The clamp is used to tighten the flexible connecting pipe. The outlet end of the flexible connecting pipe is connected to the main sewage collection and drainage pipeline. The second structure includes a flexible connecting pipe with a flange at the inlet end, and the outlet end of the flexible connecting pipe is connected to the main sewage collection and drainage pipeline. The flexible connecting pipe can be welded to a steel pipe outlet using the flange. The third structure includes a flexible connecting pipe with a pipe joint at the inlet end, and the outlet end of the flexible connecting pipe is connected to the main sewage collection and drainage pipeline. The flexible connecting pipe can be sealed and connected to the outlet in the form of PVC pipe or PE pipe using the pipe joint. The fourth structure includes a flexible connecting pipe with a manhole buried pipe at the inlet end, and the outlet end of the flexible connecting pipe is connected to the sewage collection and drainage main pipeline. The flexible connecting pipe can be sealed and connected to a U-shaped ditch or U-shaped channel through the manhole buried pipe.

[0013] In some embodiments, the flexible connecting pipe of at least one of structure one, structure two, structure three, and structure four is a PVC knife-coated cloth sleeve.

[0014] In some embodiments, the cross-sectional area of ​​the flexible connecting pipe in the outlet adapter connection structure is smaller than the cross-sectional area of ​​the main sewage collection pipeline.

[0015] In some embodiments, the flexible connecting tube has a circular or polygonal cross-sectional shape.

[0016] In some embodiments, the cross-sectional shape of the main sewage collection pipeline is circular or polygonal.

[0017] In some embodiments, the flexible connecting pipe has the same or different cross-sectional shape as the main sewage collection and drainage pipeline.

[0018] In some embodiments, the flexible bypass has the same or different cross-sectional shape as the main sewage collection pipeline.

[0019] In some embodiments, the flexible bypass has the same cross-sectional shape and cross-sectional area as the main sewage collection and drainage pipeline.

[0020] In some embodiments, the automatic stormwater and sewage diversion gate system further includes a gate assembly disposed at the outlet end of the main sewage collection pipeline, the gate assembly comprising: A gate is provided at the outlet end of the main sewage collection pipeline and arranged along the cross-section of the main sewage collection pipeline. The gate is provided with a gate for water to flow through. A gate plug is disposed on the side of the gate plate away from the inlet end of the main sewage collection pipeline and is sealed and adapted to the gate opening; the gate plug is connected to the floating water passage window through a traction mechanism and can open the gate opening when the annular window frame switches to the floating state and close the gate opening when the annular window frame switches to the sinking state.

[0021] In some embodiments, the gate is a spherical gate; a sealing bevel for sealing and limiting the gate is provided on the side of the gate that is away from the water inlet end of the sewage collection main pipeline.

[0022] In some embodiments, the main sewage collection pipeline includes a plurality of pipeline support frames arranged at intervals along the pipeline extension direction and a flexible sewage collection pipe wrapped around each of the pipeline support frames. The traction mechanism includes a traction rope and a guide pulley assembly. The guide pulley assembly includes multiple pulleys and is distributed on the top of different pipeline support frames. One end of the traction rope is connected to the brake, and the other end of the traction rope passes through each of the pulleys in sequence and is connected to the floating water passage window.

[0023] In some embodiments, the flexible bypass includes multiple pipeline support frames spaced apart along the pipeline extension direction and a flexible guide pipe wrapped around each of the pipeline support frames; pulleys are provided on some or all of the pipeline support frames of the flexible bypass, and the other end of the traction rope passes sequentially around each of the pulleys in the main sewage collection pipeline and each of the pulleys in the flexible bypass before being connected to the floating water passage window.

[0024] Furthermore, this invention proposes the application of the aforementioned automatic rainwater and sewage separation gate system in rainwater and sewage mixed water treatment projects.

[0025] The present invention achieves the following technical effects compared to the prior art: The floating water passage window of this invention has a reasonable structural design. It uses a flexible bypass and a floating water passage window to form a pressure-tilting bypass of the main pipeline. During the process of the water flow changing from small to large and then from large to small, the pressure-tilting bypass is automatically driven to open and close automatically by the system bearing the pressure increase and decrease process. This smoothly discharges a large amount of rainwater with good water quality from the pretreatment system, which can avoid the large amount of rainwater with good water quality occupying the space of the treatment system and overcome the problem that the treatment effect of high-concentration rainwater and sewage is limited by the system capacity.

[0026] The automatic rainwater and sewage diversion gate system of this invention features an ingenious structural design. It allows sewage within the system channel to be guided and discharged through backup floating water passages of different specifications. This enables the collection of sewage at varying dosages, achieving different treatment standards and effective control, while maintaining a consistently controllable and stable flow rate. This ensures the entire sewage treatment system operates within a stable hydraulic retention time, balancing the carbon-to-nitrogen ratio of the flowing sewage with the healthy degradation capacity of the water-treating microorganisms. The ingenious design of the floating water passages, through a pressure-tilting automatic opening and closing mechanism, reduces the total amount of sewage to be treated, significantly alleviating the burden on sewage treatment. The overall design is energy-saving and emission-reducing, achieving automatic switching with zero energy consumption. This makes it possible to achieve 100% in-situ effective treatment of initial rainwater and sewage, solving the technical challenge of treating large volumes of mixed rainwater and sewage that far exceed the design capacity of planned sewage treatment plants in the region, making unified collection and centralized treatment difficult.

[0027] In some specific solutions, the floating water passage and the end gate assembly are linked by a traction mechanism. During the floating water passage's up-and-down state switching, the gate can be automatically switched to open and close. Ultimately, through stable physical principles, it can selectively collect only the initial mixed rainwater and sewage, while the rainwater with better water quality will be discharged in time through the floating water passage, ensuring that the limited sewage is accurately collected and treated in situ. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the floating water-passing window disclosed in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the floating water-passing window disclosed in Embodiment 2 of the present invention; Figure 3 This is a schematic diagram illustrating the installation and usage principle of the floating water-passing window disclosed in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the automatic rainwater and sewage diversion gate system disclosed in an embodiment of the present invention; Figure 5 This is a schematic diagram of the gate and the gate plug in the automatic rainwater and sewage diversion gate system disclosed in an embodiment of the present invention.

[0030] In the figure, the attached reference numerals are: 100-Automatic Separation Gate System for Rainwater and Sewage; 1-Floating water-passing window; 11-Circular window frame; 12-Water-passing window; 2-Flexible bypass; 21-Water passage section; 22-Window frame traction section; 3-Main sewage collection pipe; 31-Pipe support frame; 32-Flexible sewage collection pipe; 33-Gate; 331-Gate; 34-Gate plug; 4- Flexible connecting pipe; 5-Tethering rope; 6-Pulley; 7-Municipal combined sewer outlet; 8-Water treatment system; 9-Reinforce anchor bolts. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] One of the objectives of this invention is to provide a floating water passage window that can be automatically opened and closed, in order to solve the problem that the treatment effect of high-concentration rainwater and sewage is limited by the system capacity.

[0033] Another objective of this invention is to provide an automatic rainwater and sewage diversion gate system that includes the aforementioned floating water-passing window, in order to solve problems such as the difficulty in modifying sewage interception and discharge outlets, incomplete modification, and the limitation of system capacity on the treatment effect of high-concentration rainwater and sewage.

[0034] Another object of the present invention is to provide the application of the above-mentioned automatic rainwater and sewage diversion gate system in rainwater and sewage mixed water treatment projects.

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1 like Figure 1 and Figure 3As shown, this embodiment provides a floating water passage window 1, which includes an annular window frame 11 capable of floating on the water surface. The space inside the annular window frame 11 is the water passage window 12 of the floating water passage window 1. The annular window frame 11 is used to connect to the side of the main pipeline via a flexible bypass 2. The annular window frame 11 can automatically switch between a floating state and a submerged state according to changes in water pressure in the main pipeline, thereby achieving control over the flow of water in the main pipeline. The aforementioned main pipeline is generally a water passage pipe, including but not limited to a sewage collection pipe used to connect to the municipal combined sewer outlet 7. When connected, the flexible bypass 2 forms an angle with the main pipeline, which can be 90 degrees (i.e., the flexible bypass 2 is perpendicular to the main pipeline) or less than 90 degrees. The flexible bypass 2, as a bypass branch of the main pipeline, is always connected to the internal water flow channel of the main pipeline. When the water pressure in the main pipeline is lower than the set water pressure (which can be flexibly adjusted according to the parameters of the main pipeline and the source of sewage in the specific application scenario), the floating water window 1 cannot overcome the buoyancy of the water and floats on the water surface. The water window 12 of the floating water window 1 serves as the outlet port of the flexible bypass 2. Floating on the water surface is equivalent to closing the outlet port of the flexible bypass 2. At this time, the water in the main pipeline flows smoothly through the main pipeline and is not discharged by the flexible bypass 2. When the water pressure in the main pipeline is equal to or greater than the aforementioned set water pressure, the floating water window 1 can tilt and sink below the water surface under the pressure attraction of the main pipeline. At this time, the main pipeline and the flexible bypass 2 are connected to the water body through the water window 12, which is equivalent to opening the outlet port of the flexible bypass 2. At this time, the water in the main pipeline can be guided into the water body using the flexible bypass 2.

[0037] In some feasible implementations, the annular window frame 11 is used to provide buoyancy for the floating water-passing window 1. Its frame can be made of hollow plastic tubes, and any cross-sectional shape of the hollow plastic tubes can be circular or polygonal. When it is a polygon, it can be a square, a regular pentagon, a regular hexagon, etc.

[0038] In some feasible implementations, the hollow plastic pipe constituting the annular window frame 11 is preferably a PE pipe or a PVC pipe, etc.

[0039] In some feasible implementations, the overall shape of the annular window frame 11 can be circular or polygonal, or it can be elliptical or other irregular shapes. For example... Figure 1 As shown, this is the structure of a rectangular window frame set for a circular window frame 11.

[0040] In some feasible implementations, the annular window frame 11 can be integrally injection molded from a hollow plastic tube, or it can be assembled from multiple sections of hollow plastic tubes according to a predetermined shape. During assembly, adjacent tube sections can be joined using pipe fittings such as elbows. The pipe fittings can be bonded to the connected tube sections using adhesive or heat sealing. (Reference) Figure 1 This refers to a rectangular window frame structure made up of four straight pipe sections and four bends spliced ​​and fixed together.

[0041] To ensure the airtight connection between the floating water passage 1 and the flexible bypass 2, it is preferable that the shape of the floating water passage 1 is generally adapted to the cross-sectional shape of the flexible bypass 2, such as... Figure 3 and Figure 4 The diagram shown illustrates that both the floating water-passing window 1 and the flexible bypass 2 have rectangular cross-sections. As described above, the floating water passage 1 can automatically switch between floating and submerged states according to changes in water pressure in the connected main pipeline, thereby achieving automatic opening and closing of the outlet port of the flexible bypass 2. The floating water passage 1 is essentially an automatic gate. When switching states, it basically tilts up and down with its upper edge as the axis. To ensure the smoothness and reliability of the state switching of the floating water passage 1, the flexible bypass 2 preferably includes a water passage section 21 and a window frame traction section 22 located at the outlet end of the water passage section 21. The window frame traction section 22 and the water passage section 21 are preferably an integral structure. The water passage section 21 is connected to the main pipeline, forming a three-way structure. The upper part of the window frame traction section 22 is short, and the lower part is long. The upper edge of the floating water passage 1 is connected to the upper part of the window frame traction section 22. Regardless of the state of the water passage, this connection position basically remains floating on the water surface. The lower edge of the floating water passage 1 is connected to the lower part of the window frame traction section 22, and the two sides of the floating water passage 1 are connected to the two sides of the window frame traction section 22. The floating water passage window 1 is sealed to the outlet end of the window frame traction section 22. The design of the window frame traction section 22 being short at the top and long at the bottom ensures that the window frame traction section 22 has sufficient expansion and contraction margin on the tilting path of the floating water passage window 1, thereby ensuring that the bottom of the floating water passage window 1 can float smoothly or tilt and sink.

[0042] The window frame traction section 22 is characterized by its short upper part and long lower part, which is mainly reflected in the fact that when the window frame traction section 22 is in a stretched state coaxial with the water passage section 21, its outlet end is a beveled surface. The floating water passage window 1 is sealed based on this floating water passage window 1.

[0043] The following section uses the application of the floating water-passing window 1 in the automatic rainwater and sewage diversion gate system as an example to explain its automatic opening and closing principle.

[0044] Based on relevant experimental data, the inventors learned that high-concentration wastewater is only discharged into the outlet within the first few minutes or tens of minutes of the initial rainwater runoff. Through investigation of the initial rainwater runoff from hundreds of different urban and rural sewage pipes, they found that culverts with obvious sewage soaking marks at the outlet had dark, foul-smelling lines extending to less than one-third of the pipe's surface area. This indicates that the initial flow rate and water pressure of the high-concentration wastewater are relatively low. By installing a floating water-passing window 1 in the bypass of the main sewage collection channel of the automatic rainwater and sewage diversion system, the system can collect only the initial high-concentration rainwater and sewage entering the river. This solves the problem that when a large amount of rainwater with better water quality is discharged into the pretreatment system, it displaces the wastewater already collected in the pretreatment system, leading to insufficient wastewater retention time and poor treatment efficiency. During the initial rainwater collection and flow through the pretreatment system, the water volume in the main pipeline naturally changes from small to large and then back to small, creating a pressure difference that generates hydrodynamic force. The floating water gate 1, acting as an automatic bypass gate for the main sewage collection pipeline, can directly utilize this pressure difference to switch between open and closed states without any external power assistance. This causes the floating water gate 1 to perform a mechanical swing-arm motion within a set range as the main pipeline pressurizes and depressurizes. The mechanical swing-arm motion refers to the switching action of the floating water gate 1 between sinking underwater under water pressure and naturally floating to the surface. Specifically, upstream discharge... When the incoming water volume is too large, the vertical flow of water in the flexible bypass 2 is obstructed. At this time, the flexible bypass 2 is connected to the floating water passage 1, and the water flow will push open the floating water passage 1 through the flexible bypass 2 to reduce pressure. This causes the water pressure that is constantly expanding in the main pipeline to be reduced and flow out through the floating water passage 1. During this process, the water flow will quickly squeeze the floating water passage 1 to make it sink underwater. The outlet channel of the flexible bypass 2, which was originally bent upward at 90 degrees, will eventually sink underwater together with the floating water passage 1, causing the flexible bypass 2 connected to the floating water passage 1 to become horizontal and keep the water flow unobstructed. When the upstream water flow slows down, the floating water passage 1 will naturally float to the surface.

[0045] The flexible bypass 2 and the floating water passage 1 together constitute the pressure-tilting bypass of the main pipeline. During the process of the water flow increasing and then decreasing, the pressure-tilting bypass is automatically activated by the system to withstand the pressurization and depressurization process, so as to smoothly discharge a large amount of rainwater with good water quality from the pretreatment system. This avoids the large amount of rainwater with good water quality occupying the space of the treatment system and overcomes the problem that the treatment effect of high-concentration rainwater and sewage is limited by the system capacity.

[0046] In practical applications, the flexible bypass 2 is preferably made of flexible blade-coated cloth. The floating water passage window 1 can be formed by using PE pipes of different diameters and setting different ring diameters to form floating water passage windows 1 with different sizes of water passage windows and different buoyancy. The floating water passage windows 1 of different specifications can be used as pre-prepared windows to meet different drainage scenarios.

[0047] Because the catchment area, outlet size, and flow rate of each outlet are different, multiple spare windows of different specifications are prefabricated for a "one outlet, one policy" approach ("one outlet, one policy" is a standard). The size of the floating water passage window 1 is selected based on the rainwater flow rate set after pre-survey of each outlet. The smaller the diameter of the PE pipe used for the floating water passage window 1, the less buoyancy it has. Under the force of increased rainwater flow and water pressure in the system, the floating water passage window 1 will tilt and sink to the bottom in advance, and the rainwater in the flexible bypass 2 channel will overflow from the bypass window. Conversely, the larger the diameter of the PE pipe used for the floating water passage window 1, the greater the buoyancy and the less affected by water pressure. The floating water passage window 1 will only sink when the water pressure reaches a certain level and exceeds its buoyancy. (If you do not want the floating water passage window 1 to discharge water, replace it with a spare floating window with greater buoyancy to form a manhole. When the pressure difference at the water passage window is greater than the water pressure bearing capacity of the entire treatment system, the floating water passage window 1 will not discharge water.)

[0048] Example 2 like Figure 2 As shown, this embodiment provides a floating water-passing window 1, which, compared to embodiment 1, is made of a PE pipe with a smaller diameter, and its buoyancy is less than that of the previous embodiment. Figure 1 The floating water-passing window 1 shown can be used as a backup window in other scenarios.

[0049] Example 3 like Figure 3 and Figure 4As shown, this embodiment proposes an automatic rainwater and sewage diversion gate system 100, which includes a main sewage collection and drainage pipe 3, a flexible bypass 2, and a floating water passage window 1 as described in Embodiment 1. The annular window frame 11 is connected to the side of the main sewage collection and drainage pipe 3 via the flexible bypass 2. The flexible bypass 2 forms an angle with the main sewage collection and drainage pipe 3, which can be 90 degrees (i.e., the flexible bypass 2 is perpendicular to the main sewage collection and drainage pipe 3) or less than 90 degrees. The flexible bypass 2, as a bypass branch of the main sewage collection and drainage pipe 3, is always connected to the internal water flow channel of the main sewage collection and drainage pipe 3. When the water pressure in the main sewage collection and drainage pipe 3 is lower than the set water pressure (this water pressure can be flexibly adjusted according to the parameters of the main pipe and the source of sewage in the specific application scenario), the floating water passage window 1 cannot overcome the buoyancy of the water and floats on the water surface. The water passage window 12 of the floating water passage window 1 serves as the outlet port of the flexible bypass 2. Its floating on the water surface is equivalent to closing the flexible bypass. At the outlet port of bypass 2, water flows smoothly through the main pipeline without being discharged by the flexible bypass 2. When the water pressure in the sewage collection main pipeline 3 is equal to or greater than the aforementioned set water pressure, the floating water passage window 1 can tilt and sink below the water surface under the pressure attraction within the main pipeline. At this time, the main pipeline and the flexible bypass 2 are connected to the water body through the water passage window 12, which is equivalent to opening the outlet port of the flexible bypass 2. At this time, the water in the sewage collection main pipeline 3 can be guided into the water body using the flexible bypass 2. The inlet end of the sewage collection main pipeline 3 is used to connect to the municipal combined sewer outlet 7, and the outlet end of the sewage collection main pipeline 3 is used to connect to the water treatment system 8. The water treatment system 8 includes, but is not limited to, an in-situ sewage treatment system built underwater, which mainly performs biological degradation treatment on the water.

[0050] The inventors, through random inspections of a storm drain outlet near a city river with poor water quality, discovered that the outlet served an 18,000-square-meter residential area upstream. The storm drain pipe, 200 meters long from the residential area to its outlet into the river, had a diameter of 60 centimeters. During a one-hour period of continuous rainfall of 50 millimeters, they observed that initially, black and foul-smelling mixed wastewater began to trickle out of the outlet. After approximately 15 minutes, the wastewater flowed through about one-third of the outlet area, at a rate of about 1 meter per second. After 15 minutes, the water quality gradually improved. Water samples were taken at the first 15 minutes, 15-25 minutes, and 25-35 minutes for testing, revealing the water quality's progression from initial black and foul odor to worse than Class V, then back to Class V, and finally to Class III. The initial experiment revealed that the initial mixed rainwater and sewage was classified as Class V or worse, indicating black and odorous water. Further sampling of rainwater and sewage flowing through the pipe for 15 to 25 minutes showed a Class V water quality. At this point, the water volume in the pipe covered approximately half the pipe's surface area, and the water color gradually changed from black to turbid. Continued sampling of rainwater and sewage flowing through the pipe for 25 to 35 minutes showed that the water quality was generally in the Class III-IV range. At this point, the water volume in the culvert gradually increased, eventually filling the pipe, and the water color gradually became clearer. Through this experimental investigation, it was found that in a 60 cm rainwater pipe covering a 200-meter section of a 18,000 square meter urban residential area, under a continuous rainfall of 50 mm for one hour, the total volume of water ranging from Class V to black and odorous levels was approximately 170 cubic meters.

[0051] Based on experimental data and comparisons with numerous similar rivers, the inventors found that the initial characteristics of urban rivers with poor water quality were similar to those of the rivers sampled in their experiments. The differences lay in the varying catchment areas, pipe sizes, and pipe lengths. The initial rainwater and sewage collection and indicator changes were essentially identical. This invention fully utilizes the water volume of urban rivers and rural ponds, rationally arranging space within urban rivers, lake inlets, and rural ponds while avoiding flood control and drainage channels. The technical process first involves centralized sewage collection at the end of the municipal combined sewer outlet 7, followed by automatic separation of initial sewage and subsequent rainwater. Combined with an underwater in-situ sewage treatment system, the initial rainwater and sewage exceeding quality standards can be degraded. Based on the aforementioned automatic rainwater and sewage diversion gate system 100, this invention completely achieves zero direct discharge of sewage at the outlet end, realizing in-situ treatment. Meanwhile, considering the different environments in various regions, and the fact that various water environments may not be able to drain the water body for construction, or that the treatment equipment may not meet the hoisting conditions due to the limitations of old residential areas and other road environments, this invention first considers the broad applicability of the technology. For different outlet designs in different municipal engineering projects, different outlet adaptation and connection structures are configured at the inlet end of the main sewage collection and drainage pipeline 3 to achieve zero direct discharge and leak-free connection of the outlets. Currently, the materials used for outlets across the country include cement pipes, cement channels, steel pipes, PVC pipes, PE pipes, corrugated pipes, etc., with shapes generally including round, square, and U-shaped. Some outlets are buried underwater, some outlet pipes protrude from the riverbank slope, and some outlet pipes are flush with the riverbank. To address the connection issues of various material outlets (such as cement pipe outlets, steel pipe outlets, etc.) with flexible automatic rainwater and sewage diversion gate systems, the specific solutions are as follows: Cement pipes and corrugated pipes are connected using stainless steel clamps and prefabricated PVC blade-coated sleeves; steel pipes are welded together using prefabricated flanges connected with PVC blade-coated sleeves; PVC pipes and PE pipes are glued and heat-fused together using prefabricated PVC and PE joints connected with PVC blade-coated sleeves respectively; U-shaped ditches and canals are connected to PVC blade-coated sleeves via buried pipes in manholes. Due to the long construction routes of urban pipe networks or culverts and their large storage capacity, a large amount of sewage accumulates in the pipe networks or culverts before the rainy season. Affected by rainwater, a large amount of sewage rushes out of the pipes instantly under the impetus of the initial rainwater, causing the water quality of downstream river networks to exceed standards and causing ecological pollution.

[0052] By designing an outlet adapter connection structure at the front end of the sewage collection main pipeline 3, not only is zero direct discharge collection of rainwater and sewage from various outlets achieved, but also, with PVC blade-coated cloth as the main structure, it has the advantages of simple and durable material selection, low investment cost and good treatment effect. The complete system can be assembled on-site by welding without draining the water body or the cooperation of hoisting equipment.

[0053] In some feasible implementations, the cross-sectional area of ​​the flexible connecting pipe 4 in the outlet adaptation connection structure is smaller than the cross-sectional area of ​​the main sewage collection pipeline 3. This design is mainly to form a variable diameter design for the entire sewage collection pipeline. The flexible connecting pipe 4 is mainly used to adapt to the diameter of the municipal stormwater and sewage mixed discharge outlet 7, while the sewage collection pipeline 3 is designed with a larger diameter relative to the flexible connecting pipe 4. This allows the stormwater and sewage to enter the subsequent water treatment system 8 with a larger flow cross-sectional area after smoothly entering the flexible connecting pipe 4, thereby improving the efficiency of stormwater and sewage collection.

[0054] In some feasible implementations, the cross-sectional shape of the flexible connecting tube 4 can be circular or polygonal.

[0055] In some feasible implementations, the cross-sectional shape of the main sewage collection pipeline 3 can be circular or polygonal.

[0056] In some feasible implementations, the cross-sectional shape of the flexible connecting pipe 4 and the main sewage collection and drainage pipe 3 can be the same or different. For example... Figure 4 The diagram shows that the flexible connecting pipe 4 has a circular cross-section, while the main sewage collection and drainage pipe 3 has a square cross-section.

[0057] In some feasible implementations, the cross-sectional shape and cross-sectional area of ​​the flexible bypass 2 and the main sewage collection and flow pipeline 3 are preferably the same to ensure uniform pressure distribution in the three-way structure formed by the flexible bypass 2 and the main sewage collection and flow pipeline 3.

[0058] In some feasible implementations, the automatic stormwater and sewage diversion gate system 100 also includes a gate assembly located at the outlet end of the main sewage collection pipeline 3, such as... Figure 4 As shown, the gate assembly includes a gate plate 33 and a gate plug 34. The gate plate 33 is located at the outlet end of the main sewage collection and water passage 3 and is arranged along the cross-section of the main sewage collection and water passage 3. The gate plate 33 has a gate opening 331 for water to flow through. The gate plug 34 is located on the side of the gate plate 33 away from the inlet end of the main sewage collection and water passage 3 and is sealed and adapted to the gate opening 331. The gate plug 34 is connected to the floating water passage window 1 through a traction mechanism and can open the gate opening 331 when the annular window frame 11 is switched to the floating state and close the gate opening 331 when the annular window frame 11 is switched to the sinking state. That is, the floating water passage window 1 with mechanical swing arm action can form a back-and-forth pulling action by triggering the traction mechanism, thereby activating the gate assembly at the outlet end.

[0059] In some feasible embodiments, the gate plug 34 is preferably a spherical gate plug, specifically a spherical rubber gate plug; a sealing bevel for sealing and limiting the spherical gate plug is provided on the side of the gate 331 away from the inlet end of the main sewage collection pipeline 3. The sealing bevel is essentially an annular spherical surface, which is flared along the thickness direction of the gate plate 33, with the smaller end facing the gate plate 33 and the larger end facing the spherical gate plug. When the spherical gate plug closes the gate 331 under the pulling action of the floating water passage window 1, it presses against the sealing bevel to form a gate seal. The sealing bevel serves two purposes: firstly, it positions the spherical gate plug for sealing; secondly, by forming a spherical contact with the spherical gate plug, the sealing effect is better, and it can also limit the further movement of the spherical gate plug.

[0060] In some feasible implementations, the main sewage collection pipeline 3 includes multiple pipeline support frames 31 spaced apart along the pipeline extension direction and flexible sewage collection pipes 32 wrapped around each pipeline support frame 31. The material of the flexible sewage collection pipes 32 includes, but is not limited to, PVC-coated fabric. The pipeline support frames 31, as the supporting structure for the flexible sewage collection pipes 32, determine the cross-sectional shape of the main sewage collection pipeline 3, such as... Figure 4 As shown, the pipeline support frame 31 adopts a rectangular gantry structure, and the cross-sectional shape of the flexible sewage collection pipe 32 it supports is also rectangular.

[0061] In some feasible implementations, the traction mechanism includes a traction rope 5 and a guide pulley group. The guide pulley group includes multiple pulleys 6, which are distributed on the top of different pipeline support frames 31. One end of the traction rope 5 is connected to the brake 34, and the other end of the traction rope 5 passes through each pulley 6 in sequence, enters the flexible bypass 2, and is connected to the lower side of the floating water passage window 1. The connection method includes, but is not limited to, hook connection, lock connection, etc.

[0062] The traction rope 5 includes, but is not limited to, steel cables.

[0063] In some feasible implementations, the flexible bypass 2 includes multiple pipeline support frames 31 spaced apart along the pipeline extension direction and flexible drainage pipes wrapped around each pipeline support frame 31. Similarly, the shape of the pipeline support frame 31 in the flexible bypass 2 determines the cross-sectional shape of the main sewage collection and drainage pipeline 3, such as... Figure 4 As shown, the pipe support frame 31 of the flexible bypass 2 adopts a rectangular gantry structure, and the cross-sectional shape of the flexible guide pipe it supports is also rectangular. Specifically, the flexible guide pipe is only supported by the pipe support frame 31 within the window frame traction section 22. The water passage section 21 needs to maintain good flexibility and deformation capacity and does not require the support of the pipe support frame 31.

[0064] In some feasible implementations, in order to ensure good guidance of the traction rope 5, it is preferable that the top of part or all of the pipeline support frame 31 of the flexible bypass 2 is also provided with pulleys 6. The other end of the traction rope 5 passes through each pulley 6 in the main sewage collection pipeline 3 and each pulley 6 in the flexible bypass 2 in sequence, and then connects to the floating water passage window 1.

[0065] In some feasible implementations, the pipeline support frame 31 of both the flexible bypass 2 and the main sewage collection and overflow pipeline 3 can be an internal frame, that is, the pipeline support frame 31 is located inside the flexible bypass 2 and the main sewage collection and overflow pipeline 3. Based on this, the aforementioned traction mechanism is located inside the pipeline, and the traction rope 5 extends from the inner top surface of the main sewage collection and overflow pipeline 3 and the flexible bypass 2 to the floating water passage window 1.

[0066] In some feasible implementations, to avoid the traction rope 5 being affected by sewage corrosion and to prevent the traction rope 5 from being built into the top of the floating water passage window 1, the traction rope 5 can be placed externally on top of the flexible bypass 2 and the main sewage collection pipeline 3. Specifically, the pipe support frame 31 of both the flexible bypass 2 and the main sewage collection pipeline 3 is higher than the cross-sectional height of the flexible bypass 2 and the main sewage collection pipeline 3, that is, the top of the pipe support frame 31 of both the flexible bypass 2 and the main sewage collection pipeline 3 extends above the top of the flexible bypass 2 and the main sewage collection pipeline 3, while the middle and bottom of the pipe support frame 31 still serve as the inner support frame of the flexible bypass 2 and the main sewage collection pipeline 3. It should be noted that the vertical rods of the pipe support frame 31 should be sealed at the locations where they penetrate the flexible drainage pipe and the flexible sewage collection pipe 32 to ensure the sealing of the flexible bypass 2 and the main sewage collection pipeline 3.

[0067] Furthermore, upward-facing flexible hoses can be installed at the locations where the vertical members of the pipe support frame 31 need to pass through the flexible drainage pipe and flexible sewage collection pipe 32. After the vertical members of the pipe support frame 31 pass through the flexible hoses, the hoses are tightened with pipe clamps, thus achieving a seal between the flexible drainage pipe and flexible sewage collection pipe 32 and the vertical members of the pipe support frame 31. The flexible hoses on the flexible drainage pipe and flexible sewage collection pipe 32 are integrally formed with the flexible drainage pipe and flexible sewage collection pipe 32, respectively. The traction rope 5 is located outside the pipeline and is connected to the bottom of the floating water passage 1 from the outside of the floating water passage 1, which can improve the flexibility of traction switching between the spherical gate and the floating water passage 1.

[0068] In some feasible implementations, considering that the flexible bypass 2 and the main sewage collection and diversion pipeline 3 are arranged at an angle, the traction rope 5 needs to be reversed. Therefore, a pulley 6 that plays a reversing role needs to be installed on the top of the pipeline support frame 31 located at the junction of the flexible bypass 2 and the main sewage collection and diversion pipeline 3. Except for this pulley 6, the rolling axis of each pulley 6 located in the main sewage collection and diversion pipeline 3 is parallel to the axial direction of the flexible bypass 2, and the rolling axis of this pulley 6 and each pulley 6 located in the flexible bypass 2 is parallel to the axial direction of the main sewage collection and diversion pipeline 3.

[0069] Considering that the automatic stormwater and sewage diversion gate system 100 is mainly deployed and assembled in urban rivers, lake inlets and rural ponds, in order to ensure the stability of the system, ropes are generally pulled on both sides of the bottom of the flexible bypass 2 and the main sewage collection and diversion pipeline 3. The ends of the ropes are connected to the reinforcing anchor rods 9, which can be inserted into the bottom mud to reinforce the automatic stormwater and sewage diversion gate system 100.

[0070] In use, a pre-fixed traction rope 5 is installed on the floating water passage 1. The other end of the traction rope 5 is fixed to the gate 34. The gate 34 is deflected by a pulley 6, solving the turning problem of the traction rope 5 between the flexible bypass 2 and the main sewage collection and drainage pipeline 3. The buoyancy of the floating water passage 1 determines the length of the rainwater discharge process. That is, the smaller the buoyancy, the more rainwater will overflow from the floating water passage 1 when there is a little rain. At this time, the floating water passage 1 will begin to tilt and sink under the force of water pressure. Under the force of continuous rainwater accumulation and the surge in water pressure, the floating water passage 1 will completely sink underwater and will not float. This achieves the purpose of 100% drainage of water from the bypass. Only when the water pressure in the main sewage collection and drainage pipeline 3 decreases will the floating water passage 1 gradually float to the surface until it is completely above the surface and stops draining rainwater. Conversely, the greater the buoyancy of the floating water passage 1, the shorter the rainwater discharge process through the bypass. This depends entirely on the actual needs of different outlets. When the floating water window 1 rises and falls, it will trigger the pre-fixed traction rope 5 to tighten or loosen. During the process of the floating water window 1 switching between rising and falling states, the opening and closing of the gate 33 is automatically switched. Finally, through a stable physical principle, it can selectively collect only the initial mixed rainwater and sewage, while the rainwater with better water quality will be discharged in time through the floating water window 1, ensuring that the limited sewage is accurately collected and treated in situ.

[0071] The aforementioned automatic stormwater and sewage diversion gate system 100, as the upstream stormwater and sewage collection and pretreatment stage of the water treatment system, achieves precise collection of only high-concentration stormwater and sewage entering the river at the initial stage, based on the initial stormwater and sewage discharge patterns and the characteristic that water quality improves relatively after the increase in rainfall volume. The principle is as follows: When rainwater enters the main sewage collection and drainage pipe 3, causing the entire river pretreatment system to be under water pressure, the incoming water will preferentially overflow through the flexible bypass 2 and out through the floating water passage 1. Under pressure, the floating water passage 1 will automatically tilt and sink. As the water pressure increases, the floating water passage 1 will gradually sink, and the water accumulated in the main sewage collection and drainage pipe 3 will automatically flow out through the floating water passage 1 to release pressure. As the floating water passage 1 continues to sink, the traction rope 5 fixed to it... The gate 34 will be pulled closer to the gate plate 33 until it is pressed against the gate opening 331. This design can prevent the sewage already collected in the water treatment system 8 from flowing out. When the floating water window 1 floats on the water surface, the traction rope 5 on the floating water window 1 is in a slack state. At this time, under the force of the water flow in the sewage collection water main pipeline 3, the gate 34 and the traction rope 5 will naturally drift away from the gate plate 33. As the floating water window 1 sinks and the traction rope 5 is continuously tightened, the gate 34 will continuously approach the gate plate 33. The distance between the floating water passage 1's upward and downward swings is greater than the distance between the gate 34 and the gate plate 33. When the floating water passage 1 tilts to a 100% vertical angle under water pressure, the flexible bypass 2, which bends upward at 90 degrees, becomes a 180-degree horizontal state. At this time, the traction rope 5 between the floating water passage 1 and the gate 34 is also taut at the pre-set length, and the gate 34 and the gate opening 331 are completely closed. Because the floating water passage 1 is upstream of the gate 34, a large amount of incoming water will overflow from the floating water passage 1. Under the action of the traction rope 5, the gate 34 completely seals the gate opening 331, cutting off the water flow at the end of the sewage collection main pipeline 3. At this time, 100% of the rainwater overflows from the floating water passage 1, while the sewage already collected in the water treatment system 8 at the back end of the pretreatment system will be stably retained in the pretreatment system, achieving sufficient retention and treatment, and ensuring that in-situ microorganisms carry out systematic degradation treatment. As the rainwater pressure decreases, the floating water passage 1 gradually rises to the surface. At this point, the traction rope 5 naturally loosens, and the gate 34 at the other end, under the pressure of the incoming water within the system and the automatic loosening force of the traction rope 5, gradually separates from the gate 331 until the upstream water flows through smoothly. Then, the floating water passage 1 at the other end of the traction rope 5 also naturally floats to the surface. After heavy rain, the rainwater at the end continues to flow into the water treatment system 8 connected to the end of the pretreatment system. The water volume at this point meets the pre-designed retention time. The buoyancy of the floating water passage 1 determines the flow rate of water through the gate 331 blocked by the gate 34. In other words, the buoyancy of the floating water passage 1 determines the total water volume that needs to be diverted by the flexible bypass 2. The greater the buoyancy of the floating water passage 1, the smaller the flow rate through the gate 331; conversely, the smaller the buoyancy of the floating water passage 1, the larger the flow rate through the gate 331. Specifically, calculations can be performed based on the wastewater treatment volume and the retention time of the water treatment system 8 to ultimately determine the container space and construction scale of the water treatment system 8.

[0072] This invention addresses the problem of urban and rural domestic sewage becoming black and odorous or eutrophic due to the combined effects of stormwater and sewage discharge, which impacts the initial discharge into urban rivers and rural ponds or lakes. The invention proposes an automatic stormwater and sewage diversion gate system 100. This system allows sewage to be diverted through spare floating water windows of different sizes within the system channel, enabling the collection of different dosages of sewage to achieve different treatment standards and effective control. It maintains a controllable and stable flow rate, ensuring the entire sewage treatment system operates within a stable hydraulic retention time and balancing the carbon-to-nitrogen ratio of the sewage flowing through the system with the healthy degradation capacity of water-treating microorganisms. The floating water-passing window 1, through its ingenious design of automatic opening and closing switching via tilting, can reduce the total amount of sewage treated and greatly alleviate the burden on various aspects of sewage treatment. The overall design is energy-saving and emission-reducing, and can achieve automatic switching with zero energy consumption. It makes it possible to achieve 100% in-situ effective treatment of initial rainwater and sewage. It solves the technical problem that the large volume of mixed rainwater and sewage formed after the mixing of domestic sewage and a large amount of rainwater has far exceeded the design load of the sewage treatment plant planned in the area, making it difficult to implement unified collection and centralized treatment.

[0073] The aforementioned automatic stormwater and sewage separation gate system 100 is mainly used in stormwater and sewage mixed water treatment projects, and is mostly deployed and assembled in urban rivers, lake inlets and rural ponds.

[0074] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0075] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A floating water-passing window, characterized in that, It includes an annular window frame (11) that can float on the water surface, and a water passage window (12) inside the annular window frame (11). The annular window frame (11) is used to connect to the side of the main pipeline through a flexible bypass (2). The annular window frame (11) can automatically switch between floating and sinking states according to the changes in water pressure in the main pipeline, so as to realize the guidance and control of water flow in the main pipeline.

2. The floating water-passing window according to claim 1, characterized in that, The frame of the annular window frame (11) is made of hollow plastic tubes, and any cross-sectional shape of the hollow plastic tubes is either circular or polygonal.

3. The floating water-passing window according to claim 2, characterized in that, The hollow plastic pipe is a PE pipe.

4. An automatic rainwater and sewage separation gate system, characterized in that, It includes a main sewage collection and drainage pipeline (3), a flexible bypass (2), and a floating drainage window (1) as described in any one of claims 1-3. The annular window frame (11) is connected to the side of the main sewage collection and drainage pipeline (3) through the flexible bypass (2). The inlet end of the main sewage collection and drainage pipeline (3) is used to connect to the municipal stormwater and sewage mixed discharge outlet (7), and the outlet end of the main sewage collection and drainage pipeline (3) is used to connect to the water treatment system (8).

5. The automatic rainwater and sewage diversion gate system according to claim 4, characterized in that, The inlet end of the main sewage collection pipeline (3) is also equipped with a discharge outlet adapter connection structure, wherein the discharge outlet adapter connection structure adopts one of structure one, structure two, structure three and structure four, wherein: The structure includes a flexible connecting pipe (4) and a clamp. The inlet end of the flexible connecting pipe (4) can be connected to the outlet in the form of a cement pipe or a corrugated pipe. The clamp is used to tighten the flexible connecting pipe (4). The outlet end of the flexible connecting pipe (4) is connected to the sewage collection and drainage main pipeline (3). The second structure includes a flexible connecting pipe (4) with a flange at the inlet end, and the outlet end of the flexible connecting pipe (4) is connected to the sewage collection and overflow main pipeline (3). The flexible connecting pipe (4) can be welded to the outlet in the form of a steel pipe using the flange. The structure three includes a flexible connecting pipe (4) with a pipe joint at the inlet end, and the outlet end of the flexible connecting pipe (4) is connected to the sewage collection and water passage main pipeline (3). The flexible connecting pipe (4) can be sealed and connected with the outlet in the form of PVC pipe or PE pipe using the pipe joint. The structure four includes a flexible connecting pipe (4) with a manhole buried pipe connected to the water inlet end. The water outlet end of the flexible connecting pipe (4) is connected to the sewage collection and water passage main pipeline (3). The flexible connecting pipe (4) can be sealed and connected to a U-shaped ditch or U-shaped channel through the manhole buried pipe.

6. The automatic rainwater and sewage diversion gate system according to claim 5, characterized in that, The flexible connecting pipe (4) of at least one of the structures 1, 2, 3 and 4 is made of PVC knife-coated cloth sleeve.

7. The automatic rainwater and sewage separation gate system according to claim 5, characterized in that, The cross-sectional area of ​​the flexible connecting pipe (4) in the outlet adapter connection structure is smaller than the cross-sectional area of ​​the sewage collection and drainage main pipeline (3).

8. The automatic rainwater and sewage separation gate system according to any one of claims 4-7, characterized in that, It also includes a gate assembly installed at the outlet end of the main sewage collection pipeline (3), the gate assembly comprising: A gate (33) is provided at the outlet end of the sewage collection and water passage (3) and arranged along the cross-section of the sewage collection and water passage (3). A gate (331) for water to flow through is provided on the gate (33). A gate plug (34) is located on the side of the gate plate (33) away from the inlet end of the sewage collection and water passage (3) and is sealed and adapted to the gate opening (331); the gate plug (34) is connected to the floating water passage window through a traction mechanism and can open the gate opening (331) when the annular window frame (11) is switched to the floating state and close the gate opening (331) when the annular window frame (11) is switched to the sinking state.

9. The automatic rainwater and sewage separation gate system according to claim 8, characterized in that, The main sewage collection pipeline (3) includes multiple pipeline support frames (31) arranged at intervals along the pipeline extension direction and a flexible sewage collection pipeline (32) wrapped around each of the pipeline support frames (31). The traction mechanism includes a traction rope (5) and a guide pulley (6) group. The guide pulley (6) group includes multiple pulleys (6) and is distributed on the top of different pipeline support frames (31). One end of the traction rope (5) is connected to the brake (34), and the other end of the traction rope (5) passes through each of the pulleys (6) in sequence and is connected to the floating water window.

10. The application of the automatic rainwater and sewage separation gate system according to any one of claims 4-9 in rainwater and sewage mixed water treatment projects.

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