Unpowered buoyancy control type rainwater and sewage separator

Abstract

The present application relates to rain sewage shunt technical field, specifically disclose a kind of unpowered buoyancy control type rain sewage shunt, including outer shell, integrated flow channel device, central control block, siphon and round plug ring.Center control block is composed of upper and lower linkage rainwater hollow box and sewage hollow box, can be slidable along the shunt passage axis.This device does not need external power, relies on buoyancy and self-weight to automatically switch rain sewage flow channel, sunny day to open sewage channel, rain to open rainwater channel, cooperate with breathing tube to balance air pressure to avoid jam, with the help of siphon to realize automatic reset.Compact structure, stable operation, applicable to community rain sewage shunt reconstruction and new drainage system.

Description

Technical Field

[0001] This invention relates to the field of rainwater and sewage diversion technology, specifically to a non-powered buoyancy-controlled rainwater-sensing rainwater and sewage diversion device. Background Technology

[0002] With the continuous advancement of urban water environment management in my country, rainwater and sewage separation has become one of the core measures to improve the efficiency of urban drainage systems, reduce the operating load of sewage treatment plants, and reduce the amount of non-point source pollution entering rivers. In the renovation of drainage systems in existing residential communities and commercial buildings, most buildings only have a single combined riser, making it difficult to achieve complete separation through pipe network reconstruction. Therefore, installing rainwater and sewage separation devices at the end of the riser has become an economical and efficient technical approach. At the same time, such devices are also widely used in the source separation systems of newly built communities.

[0003] Currently, commonly used rainwater and sewage separation devices are mainly divided into two categories: electrically controlled and non-powered. Electrically controlled separation devices rely on rain sensors and liquid level sensors in conjunction with electric actuators to control the flow channel switching. Although the control logic is flexible, it requires external power supply lines and control equipment. In the damp underground well environment, the failure rate of electrical components is high, the maintenance cost is high, and it is prone to failure when there is a power outage or sensor failure. Therefore, it is not suitable for the renovation of old residential areas with limited operation and maintenance conditions.

[0004] Non-powered diversion devices mostly rely on buoyancy components such as floats and pontoons to drive valve actions, requiring no external energy source. However, they generally have significant technical shortcomings: First, the flow channel structure is mostly a split, spliced ​​design, with a scattered internal flow channel layout, many dead angles, and poor hydraulic conditions. Mud, fallen leaves, and fibrous debris from combined sewer overflows easily accumulate in these dead angles, jamming the buoyancy actuators and causing the diversion function to fail. Moreover, cleaning the internal silt is difficult and maintenance costs are high. Second, the linkage between flow channel switching is insufficient. The rising and falling action of the buoyancy components is poorly matched with the opening and closing of the rainwater and sewage flow channels. During the transition, the two flow channels are prone to cross-flow, resulting in insufficient diversion accuracy and difficulty in ensuring complete separation of rainwater and sewage. Third, the reset response after rainfall stops is slow. Most devices rely solely on the natural descent of the buoyancy components under their own weight. The liquid level inside the cavity drops slowly, and there is a significant lag in flow channel switching. This results in a large amount of domestic sewage still mixing into the rainwater pipe network after rainfall, affecting the final diversion effect. Summary of the Invention

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A non-powered buoyancy-controlled rain-sensing rainwater and sewage diversion device includes an outer shell, an inner cavity, an opening at the top, a closed bottom, and a mixing port, a rainwater port, and a sewage port on the side walls that communicate with the inner cavity.

[0007] An integrated flow channel is fixedly installed at the radial center of the receiving cavity. A diversion channel is vertically oriented through the middle of the integrated flow channel. The side walls are respectively connected to the positions of the mixing port, rainwater port, and sewage port, and are respectively connected to the mixing channel, rainwater channel, and sewage channel. All three channels are connected to the diversion channel. The rainwater port and sewage port are not at the same height. The rainwater port is located above the sewage port. The height of the mixing port is between the heights of the rainwater port and the sewage port. The diameter of the mixing port overlaps with the diameters of the rainwater port and the sewage port in the vertical direction.

[0008] A central control block is slidably installed along the axial direction within the diversion channel. The central control block includes a rainwater hollow box and a sewage hollow box arranged coaxially. The rainwater hollow box is located above the sewage hollow box and is fixedly connected by a connecting rod.

[0009] The integrated flow channel is equipped with a siphon tube at the top. The siphon tube has a U-shaped structure, with one end inserted from the top surface of the integrated flow channel and connected to the rainwater channel, and the other end located above the integrated flow channel.

[0010] A circular plug ring is fixedly connected to the middle position of the bottom of the integrated flow channel device, and the hollow sewage box can move up and down axially inside the circular plug ring.

[0011] Furthermore, the shunt also includes a breathing tube, the lower end of which passes through the integrated flow channel and is connected to the lower part of the receiving cavity, and the upper end extends out of the top opening of the outer shell; the side wall of the circular plug ring is provided with a vent hole, and the interior of the circular plug ring is connected to the lower part of the receiving cavity through the vent hole.

[0012] Furthermore, when the central control block moves upward to the position where the rainwater hollow box completely blocks the rainwater channel, the rainwater hollow box simultaneously blocks the upper half of the mixed flow channel in the vertical direction, the sewage hollow box is located inside the circular blocking ring and the sewage channel is in an unobstructed state; when the central control block moves downward to the position where the sewage hollow box completely blocks the sewage channel, the sewage hollow box simultaneously blocks the lower half of the mixed flow channel in the vertical direction, and the rainwater channel is in an unobstructed state.

[0013] Furthermore, the outer shell has a cylindrical structure.

[0014] Furthermore, the outer wall of the integrated flow channel is tightly sealed to the inner wall of the outer shell, dividing the receiving cavity into an upper cavity and a lower cavity that are not interconnected.

[0015] Furthermore, the diversion channel, mixing channel, rainwater channel, and sewage channel are all cylindrical channels with a circular cross-section.

[0016] Furthermore, the rainwater hollow box and the sewage hollow box are coaxially arranged cylindrical sealed hollow boxes.

[0017] Furthermore, a limit bar is provided laterally at the top center of the outer casing to limit the highest position of the central control block's upward movement.

[0018] Compared with the prior art, the beneficial effects of this invention are as follows:

[0019] This invention adopts a non-powered drive design throughout the process. It automatically completes the switching of rainwater and sewage channels by relying on the buoyancy generated by the change of rainwater level and the self-weight of the central control block. It does not require external power supply, sensors and electronic control actuators, so it has high operational reliability, low maintenance cost and is suitable for various new construction and renovation drainage scenarios.

[0020] This invention adopts an integrated flow channel device to integrate all flow channel structures. The flow channel layout is compact and smooth, with excellent hydraulic conditions, which can effectively reduce the risk of debris accumulation and blockage, while facilitating overall assembly, maintenance and replacement.

[0021] This invention adopts a central control block structure with dual hollow boxes linked together. During the lifting process, the rainwater channel and the sewage channel are opened and closed alternately. The flow channel switching logic is clear and the diversion is thorough, which can effectively avoid the problem of rainwater and sewage crossflow.

[0022] The present invention is configured with a pressure balancing structure consisting of a breathing tube and an air vent, which can balance the pressure changes inside the cavity during the raising and lowering of the central control block in real time, eliminate negative pressure adsorption and air resistance jamming problems, ensure smooth and stable operation of the central control block, and improve the stability of equipment operation.

[0023] This invention utilizes the siphon effect of a siphon pipe to achieve continuous discharge of high-level water, ensuring stable drainage under high liquid levels during rainy weather and accelerating the drop in liquid level after rainfall stops, thus shortening the response time for the equipment to reset to the sewage level and preventing sewage from mixing into the rainwater pipe network. Attached Figure Description

[0024] Figure 1 This is a perspective view of the overall structure of the present invention;

[0025] Figure 2 This is a perspective view of the integrated flow channel device of the present invention;

[0026] Figure 3 This is a perspective view of the central control block of the present invention;

[0027] Figure 4 This is a schematic diagram of the integrated flow channel device and the central control block of the present invention.

[0028] Figure 5 This is a top view of the overall structure of the present invention;

[0029] Figure 6 for Figure 5 Sectional view along line AA.

[0030] In the diagram: 1. Outer shell; 2. Receiving cavity; 3. Mixing inlet; 4. Rainwater inlet; 5. Sewage inlet; 6. Integrated flow channel; 7. Diversion channel; 8. Mixing channel; 9. Rainwater channel; 10. Sewage channel; 11. Central control block; 12. Rainwater hollow box; 13. Sewage hollow box; 14. Connecting rod; 15. Siphon tube; 16. Circular plug ring; 17. Breathing tube; 18. Vent hole; 19. Limiting bar. Detailed Implementation

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

[0032] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Example

[0035] like Figure 1-6 As shown in the figure, the non-powered buoyancy control type rain sensor and sewage separator disclosed in this embodiment is mainly installed at the end of the riser of buildings with mixed rain and sewage. It is suitable for renovation projects of old communities that have not yet completed the separation of rain and sewage, and can also be used in conjunction with the source rain and sewage separation system of newly built communities.

[0036] The rainwater and sewage separator provided in this embodiment includes an outer shell 1, which is a vertically arranged cylindrical structure. An internal cavity 2 is formed inside the outer shell 1. The top of the outer shell 1 is open, and the bottom is closed to prevent sewage leakage into the external soil. The side walls of the outer shell 1 are respectively provided with a mixing inlet 3, a rainwater inlet 4, and a sewage inlet 5, all communicating with the cavity 2. The rainwater inlet 4 is located above, and the sewage inlet 5 is located below. The height of the mixing inlet 3 is between that of the rainwater inlet 4 and the sewage inlet 5, and the diameter of the mixing inlet 3 overlaps with the diameters of the rainwater inlet 4 and the sewage inlet 5 in the vertical direction.

[0037] In this embodiment, an integrated flow channel 6 is fixedly installed at the radial center of the receiving cavity 2. The outer contour of the integrated flow channel 6 is adapted to the inner wall of the outer shell 1, and the two fit tightly together to achieve fixation. At the same time, it divides the receiving cavity 2 into an upper rainwater chamber and a lower sewage chamber that are not connected to each other. A diversion channel 7 is vertically opened through the middle of the integrated flow channel 6. The diversion channel 7 is a cylindrical cavity. On the side wall of the integrated flow channel 6, corresponding to the positions of the mixing port 3, the rainwater port 4, and the sewage port 5, there are a mixing channel 8, a rainwater channel 9, and a sewage channel 10, respectively. All three channels are cylindrical channels with a circular cross-section. The inner ends of each channel are connected to the diversion channel 7, and the outer ends are aligned and connected to the corresponding interfaces of the outer shell. The inner wall of the flow channel is smooth and has no dead corners, making it difficult for debris to accumulate.

[0038] In this embodiment, a central control block 11 is provided inside the diversion channel 7. The central control block 11 can slide up and down along the axial direction of the diversion channel 7. The central control block 11 includes a rainwater hollow box 12 and a sewage hollow box 13, both of which are cylindrical sealed hollow boxes made of lightweight waterproof material with an overall density less than water, thus generating sufficient buoyancy in water. The rainwater hollow box 12 is located directly above the sewage hollow box 13, and the two are coaxially fixedly connected by a connecting rod 14 to form a synchronous linkage structure, ensuring that the lifting and lowering actions are completely consistent and realizing the synchronous switching of the two flow channels.

[0039] In this embodiment, a siphon tube 15 is provided on the top of the integrated flow channel device 6. The siphon tube 15 has a U-shaped bend structure, with one end vertically inserted from the top surface of the integrated flow channel device 6 and connected to the rainwater channel 9. The other end opens downwards, and its port is located in the upper space of the diversion channel 7 above the integrated flow channel device 6. When the liquid level in the diversion channel 7 exceeds the height of the top of the siphon tube 15, the siphon effect is triggered, continuously discharging the upper water into the rainwater channel 9 to maintain a stable liquid level.

[0040] In this embodiment, a circular plug ring 16 is fixedly connected to the middle position of the bottom of the integrated flow channel 6. The circular plug ring 16 is coaxially arranged with the diversion channel 7, and its inner wall is in clearance fit with the outer wall of the sewage hollow box 13. The sewage hollow box 13 can move up and down along the axial direction inside the circular plug ring 16.

[0041] In this embodiment, a pressure balancing component is also provided, including a breathing tube 17 and a vent 18. The breathing tube 17 is vertically arranged, with its lower end passing through the integrated flow channel 6 and entering the lower cavity of the receiving cavity 2, and its upper end extending out of the top opening of the outer shell 1 to communicate with the atmosphere. A vent 18 is provided on the side wall of the circular plug ring 16, and the internal space of the circular plug ring 16 is connected to the lower cavity of the receiving cavity 2 through the vent 18, thereby maintaining the air pressure consistent with the outside atmosphere through the breathing tube 17, forming a complete pressure balancing circuit.

[0042] In this embodiment, a limiting strip 19 is horizontally arranged at the top middle position of the outer shell 1. The limiting strip 19 is directly above the central control block 11 and is used to limit the highest position of the central control block 11 to move upward, preventing the central control block 11 from floating excessively and falling out of the diversion channel 7, while ensuring the accuracy of the upper limit position and ensuring that the flow channel is blocked in place.

[0043] The working principle and operation process of this shunt are explained in detail below, combining three working modes:

[0044] 1. Sunny Day Mode

[0045] In a sunny condition, the central control block 11 falls to the lower limit position under its own gravity, the sewage hollow box 13 is completely submerged inside the circular blocking ring 16, and the sewage channel 10 is unobstructed; at this time, the rainwater hollow box 12 completely blocks the rainwater channel 9, and at the same time blocks the upper half of the mixed flow channel 8 in the height direction, leaving only the lower half of the mixed flow channel 8 open.

[0046] After entering through the mixing inlet 3, the sewage flows into the lower part of the diversion channel 7 via the mixing channel 8, and then exits through the sewage outlet 5 into the sewage network via the sewage channel 10. In this state, the rainwater channel 9 is completely blocked, which can effectively prevent sewage from mixing into the rainwater network and ensure thorough diversion.

[0047] 2. Rain Mode

[0048] After the rainfall begins, the rainwater chamber is filled with water. The rainwater hollow box 12 is immersed in the water and is buoyed, which causes the entire central control block 11 to slide upward along the diversion channel 7. At the same time, the sewage hollow box 13 moves upward from the circular plug ring 16.

[0049] As the liquid level rises, the central control block 11 moves upward, the sewage hollow box 13 gradually blocks the sewage channel 10, and the rainwater hollow box 12 gradually opens the rainwater channel 9. When the liquid level reaches the set height, the central control block 11 moves to the upper limit position, and the top is limited by the limit bar 19. At this time, the sewage hollow box 13 completely blocks the sewage channel 10, and at the same time blocks the lower half of the mixed flow channel 8 in the height direction; the rainwater hollow box 12 completely leaves the rainwater channel 9, and the rainwater channel 9 is in a fully open state.

[0050] At this time, the mixed flow water is mainly rainwater. After entering from the mixing outlet 3, it flows into the diversion channel 7 through the mixing channel 8, and then is discharged into the rainwater pipe network from the rainwater outlet 4 through the rainwater channel 9, realizing direct discharge of rainwater on rainy days and effectively reducing the operating load of the sewage treatment plant.

[0051] During the upward movement of the central control block 11, the hollow wastewater box 13 is drawn upward from the circular plug ring 16, increasing the internal space of the circular plug ring 16 and easily creating negative pressure. At this time, outside air can enter the lower cavity of the receiving chamber 2 through the breather pipe 17, and then be replenished into the circular plug ring 16 through the vent 18, balancing the air pressure in the cavity in real time, completely eliminating the jamming problem caused by negative pressure adsorption, ensuring the smooth upward movement of the central control block 11, and significantly improving the reliability of equipment operation.

[0052] Once the water reaches the set level in the rainwater reservoir, a siphon effect is created through the siphon pipe, continuously draining the rainwater from the reservoir into the rainwater channel.

[0053] 3. Rain turning to sunny mode

[0054] After rainfall stops, no water enters the rainwater chamber. The siphon in the rainwater chamber continues to drain water into the rainwater channel, causing the liquid level to drop. When the level falls below the siphon inlet, the siphon stops. Due to its own weight, the central control block descends to its lowest position, blocking the rainwater channel with the hollow rainwater box, thus closing the rainwater channel. The sewage hollow box sinks into the circular plug ring 16, opening the sewage drainage channel, and the mixed liquid is discharged through the sewage outlet.

[0055] When the liquid level drops back to the sunny working position, the central control block 11 descends to the lower limit position, the rainwater hollow box 12 re-seals the rainwater channel 9, the sewage channel 10 is restored to unobstructed, and the equipment automatically switches back to the sunny sewage discharge mode to ensure that all subsequent domestic sewage enters the sewage pipe network and avoids sewage from mixing into the rainwater system and causing water pollution.

[0056] The diverter in this embodiment requires no external power or manual intervention throughout the entire process. It can automatically switch between rainwater and sewage channels according to the inflow rate and liquid level. It has a compact structure, stable operation, and simple maintenance, and has good engineering application value.

[0057] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A non-powered buoyancy-controlled rain-sensing sewage diversion device, characterized in that, include: The outer shell (1) has a cavity (2) inside, an opening at the top, and a closed bottom. The side walls of the outer shell (1) are respectively provided with a mixing port (3), a rainwater inlet (4), and a sewage inlet (5) that connect to the cavity (2). An integrated flow channel device (6) is fixedly installed at the radial center of the receiving cavity (2). A diversion channel (7) is provided through the middle of the flow channel device (6) in the vertical direction. The side wall of the integrated flow channel device (6) is connected to the positions of the mixing port (3), the rainwater port (4) and the sewage port (5), respectively, and is provided with a mixing channel (8), a rainwater channel (9) and a sewage channel (10). The mixing channel (8), the rainwater channel (9) and the sewage channel (10) are all connected to the diversion channel (7). The rainwater port (4) and the sewage port (5) are not at the same height, and the rainwater port (4) is located above the sewage port (5). The height of the mixing port (3) is between the heights of the rainwater port (4) and the sewage port (5), and the diameter of the mixing port (3) overlaps with the diameters of the rainwater port (4) and the sewage port (5) in the vertical direction. The central control block (11) is slidably disposed in the diversion channel (7) along the axial direction of the diversion channel (7), including a rainwater hollow box (12) and a sewage hollow box (13) arranged coaxially. The rainwater hollow box (12) is located above the sewage hollow box (13) and is fixedly connected by a connecting rod (14). The siphon (15) is a U-shaped tube structure. One end of it is inserted from the top surface of the integrated flow channel (6) and connected to the rainwater channel (9). The other end is located above the integrated flow channel (6). The circular plug ring (16) is fixedly connected to the middle position of the bottom of the integrated flow channel device (6), and the sewage hollow box (13) can move up and down along the axis inside the circular plug ring (16).

2. The non-powered buoyancy-controlled rain-sensing sewage separator according to claim 1, characterized in that, It also includes a breathing tube (17), the lower end of which passes through the integrated flow channel device (6) and is connected to the lower part of the receiving cavity (2), and the upper end of the breathing tube (17) extends out of the top opening of the outer shell (1); the side wall of the circular plug ring (16) is provided with a vent hole (18), and the interior of the circular plug ring (16) is connected to the lower part of the receiving cavity (2) through the vent hole (18).

3. The non-powered buoyancy-controlled rain-sensing sewage separator according to claim 1, characterized in that, When the central control block (11) moves up to the position where the rainwater hollow box (12) completely blocks the rainwater channel (9), the rainwater hollow box (12) simultaneously blocks the upper half of the mixed flow channel (8) in the height direction, the sewage hollow box (13) is located inside the circular blocking ring (16) and the sewage channel (10) is in a smooth state. When the central control block (11) moves down to the position where the sewage hollow box (13) completely blocks the sewage channel (10), the sewage hollow box (13) simultaneously blocks the lower half of the mixed flow channel (8) in the height direction, and the rainwater channel (9) is in a smooth state.

4. The non-powered buoyancy-controlled rain-sensing sewage separator according to claim 1, characterized in that, The outer shell (1) has a cylindrical structure.

5. A non-powered buoyancy-controlled rain-sensing sewage separator according to claim 4, characterized in that, The outer wall of the integrated flow channel (6) is tightly sealed to the inner wall of the outer shell (1), dividing the receiving cavity (2) into an upper cavity and a lower cavity that are not connected to each other.

6. A non-powered buoyancy-controlled rain-sensing sewage separator according to claim 5, characterized in that, The diversion channel (7), mixing channel (8), rainwater channel (9) and sewage channel (10) are all cylindrical channels with a circular cross-section.

7. A non-powered buoyancy-controlled rain-sensing sewage separator according to claim 6, characterized in that, The rainwater hollow box (12) and the sewage hollow box (13) are coaxially arranged cylindrical sealed hollow boxes.

8. A non-powered buoyancy-controlled rain-sensing sewage separator according to claim 1, characterized in that, A limit stop (19) is provided horizontally at the top middle position of the outer shell (1) to limit the highest position of the central control block (11) moving upward.

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