Self-adaptive rain and sewage diversion device for catch basin and use method of self-adaptive rain and sewage diversion device

Abstract

The invention provides a self-adaptive rain and sewage diversion device for an intercepting well and a use method thereof. The self-adaptive rain and sewage diversion device comprises a well body, and a sewage discharge pipe is arranged on one side of the well body; two fixing plates are arranged on the inner side of the well body and located on the two sides of a pipe opening of the blow-off pipe. A water blocking plate is connected between the two fixing plates in a sliding mode and is tightly attached to the pipe opening of the blow-off pipe; buoyancy mechanisms are arranged on the two sides of the water blocking plate and used for lifting the water blocking plate by means of buoyancy of water. The flux of the blow-off pipe is automatically controlled through buoyancy, electric control is not needed, and the installation cost, the maintenance cost and the use cost are lower; the flux of the blow-off pipe is automatically controlled in rainy days, so that a large amount of rainwater is prevented from being discharged through the blow-off pipe, excessive sewage treatment burden is avoided, and sewage can be prevented from being discharged through a rainwater pipeline; the minimum outflow area can be calculated and adjusted according to different use scenes and installation adjustment, and the adaptability is higher.

Description

Technical Field

[0001] This invention relates to the field of rainwater and sewage separation technology, specifically to an adaptive rainwater and sewage separation device with an intercepting well and its usage method. Background Technology

[0002] A stormwater and sewage separation system is a device that separates rainwater and sewage. The separated rainwater and sewage are transported and treated through different pipelines. This system prevents sewage from entering rivers and causing pollution, and also prevents excessive rainwater from entering sewage pipes, thus reducing the efficiency of sewage treatment.

[0003] Existing rainwater and sewage separation devices generally employ two overflow methods to separate sewage and rainwater. One method uses an overflow baffle to separate the sewage pipeline and the rainwater pipeline. When the water level exceeds the height of the baffle, an overflow occurs, draining water through both the sewage pipeline and the rainwater pipeline simultaneously. The other method closes the sewage pipeline when the water level is high enough, allowing only the rainwater pipeline to drain water.

[0004] Both of the above devices can achieve rainwater and sewage separation. However, with the first method, the sewage pipes will be full for a long time during rainy days, whereas they are not actually full under normal circumstances. Therefore, the prolonged fullness of the sewage pipes during rainy days will place a great burden on the sewage treatment plant, increase treatment costs, and even pose safety hazards. The other method directly shuts off the sewage pipes, causing all sewage to be discharged with the rainwater pipes, which can easily cause environmental pollution. Furthermore, the opening and closing of the sewage pipes is controlled by equipment such as motors or hydraulic cylinders, resulting in higher operating and maintenance costs. Summary of the Invention

[0005] The main objective of this invention is to provide an adaptive rainwater and sewage separation device for intercepting wells and its usage method, which solves the problems of high usage and maintenance costs of existing equipment and difficulty in limiting the inflow of sewage into the sewage pipe during rainwater and sewage separation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: An adaptive rainwater and sewage separation device for intercepting wells includes a well body, with a sewage pipe provided on one side of the well body; The well body is equipped with two fixing plates on the inside, which are located on both sides of the sewage pipe opening; A water-blocking plate is slidably connected between the two fixed plates, and the water-blocking plate is in close contact with the sewage pipe opening; Both sides of the water-blocking plate are equipped with buoyancy mechanisms, which are used to raise and lower the water-blocking plate by means of the buoyancy of the water.

[0007] In the preferred embodiment, the water-blocking plate moves between a high position and a low position. When it is in the low position, the water-blocking plate does not block the sewage pipe opening at all. When it is in a high position, the water-blocking plate covers the sewage pipe opening.

[0008] In the preferred embodiment, a drain pipe is provided on one side of the well body, and a mesh is provided at the end of the drain pipe; A sewage inlet pipe is provided on the other side of the well body, and a fixing sleeve is provided inside the well body; The fixed sleeve has a U-shaped cross-section and forms a water flow chamber with the well body; the sewage inlet pipe is connected to the water flow chamber; The bottom end of the fixed sleeve is higher than the bottom end of the well body, forming a through hole; After entering, the sewage first flows through the water chamber and into the through hole, then flows to the bottom of the well body, and finally is discharged through the sewage pipe.

[0009] In the preferred embodiment, the buoyancy mechanism is located at the upper ends of both ends of the water-blocking plate; When the water-blocking plate is not moved to a high position, the buoyancy mechanism is affected by the buoyancy of the water, which causes the water-blocking plate to rise and fall, and the top surface of the water-blocking plate is not higher than the water surface.

[0010] In a preferred embodiment, the water-blocking plate includes a water baffle plate, and both fixed plates are provided with sliding grooves. The sliding grooves are adapted to the water baffle plate, and the two ends of the water baffle plate are slidably connected to the inside of the sliding grooves. The top of the baffle plate is equipped with a drainage groove; After the baffle plate is raised, the water leakage channel and the sewage pipe form a leakage hole; Several rolling balls are provided at the connection between the baffle plate and the chute, and the chute is provided with a groove, with the rolling balls extending into the interior of the groove.

[0011] In the preferred embodiment, the baffle plate is provided with a movable groove on the side near the sewage pipe, and the movable groove is connected to the leakage groove; The inner side of the baffle plate is provided with two limiting grooves, which are located on both sides of the movable groove and extend to both sides of the leakage groove. An adjusting plate is slidably connected inside the movable groove, and the adjusting plate extends slidably into the interior of the drain groove; the edge of the adjusting plate is provided with a limiting strip, which is slidably connected inside the limiting groove; The limiting groove is equipped with a threaded rod, which passes through the limiting strip and is threadedly connected to the limiting strip. The two ends of the threaded rod are smooth and rotatably connected to the baffle plate; The top of the threaded rod passes through the baffle and is equipped with a knob; The adjustment plate has a scale groove on its side.

[0012] In a preferred embodiment, the buoyancy mechanism includes a movable plate fixed to the side of the water-blocking plate; The movable panel is located on the side of the fixed panel; An airbag is provided on the side of the movable plate away from the fixed plate; A horizontal plate is fixed to the top of the airbag; The horizontal plate is equipped with a connecting plate, and the bottom of the connecting plate is equipped with a connecting rod; The movable plate has a connecting groove on the side near the airbag, and the connecting rod is adapted to the connecting groove. The cross-section of the connecting rod is T-shaped. The connecting plate and the movable plate are fixed together with screws; A clamp is provided on the side of the connecting rod near the airbag, and the clamp is fitted around the outer periphery of the airbag.

[0013] In the preferred embodiment, the airbag is equipped with an air replenishment mechanism for replenishing the airbag with gas; The air replenishment mechanism includes a connecting tube that connects to the airbag; The top of the fixed plate is provided with a first connecting sleeve, and the connecting tube slides through the first connecting sleeve; The top end of the connecting pipe is connected to a fixed pipe via a branch pipe; The inner wall of the well body is provided with several second connecting sleeves, and the fixed pipe slides through the second connecting sleeves; The top of the fixed pipe is located above the well body and is equipped with an air inlet. The inflation connector has a built-in one-way valve.

[0014] A method for using an adaptive rainwater and sewage separation device with an intercepting well includes the following steps: S1. Install the device at the designed location and test the parameters after installation; S2. Calculate the minimum outflow area during rainfall; S3. Adjust the area of ​​the water leakage hole formed between the water baffle plate and the sewage pipe when the water baffle plate is moved to the high position according to the minimum outflow area, so that it is not less than the minimum outflow area. S4. The pipeline is connected, and sewage enters normally and flows to the sewage treatment plant through the sewage pipe. S5. During rainy days, the water flow increases and the water level rises. The airbag of the buoyancy mechanism is affected by buoyancy, which drives the water-blocking plate to rise, blocking part of the sewage pipe and forming a leak. Rainwater is discharged through drain pipes, and sewage is discharged through leak holes.

[0015] In the preferred scheme, the minimum outflow area in S2 is: ; In the formula: To minimize the outflow area, For design traffic, H is the orifice outflow coefficient. The distance from the centroid to the top of the intercepting well; ; In the formula: K is the coefficient of variation of comprehensive domestic sewage volume. To design the comprehensive domestic sewage volume, This is the coefficient for the change in industrial wastewater volume. To design industrial wastewater volume, This refers to the amount of groundwater that infiltrates. To intercept rainwater.

[0016] This invention provides an adaptive rainwater and sewage separation device for intercepting wells and its usage method. By adopting the above solution, the following beneficial effects are achieved: The sewage pipe flow rate is automatically controlled by buoyancy, eliminating the need for electric control and resulting in lower installation, maintenance, and operating costs.

[0017] Automatically controlling the flow rate of sewage pipes during rainy weather not only prevents large amounts of rainwater from being discharged through the sewage pipes, thus avoiding excessive burden on sewage treatment, but also prevents sewage from being discharged through rainwater pipelines.

[0018] It can calculate and adjust the minimum outflow area according to different usage scenarios and installation adjustments, making it more adaptable.

[0019] It allows for easy inflation and deflation of the airbag to avoid excessively high or low buoyancy, making adjustment convenient and subsequent use easier.

[0020] When the airbag leaks after prolonged use or when scale adheres to the surface of the airbag, resulting in insufficient buoyancy, it is easy to replenish the airbag later to ensure the stable use of the device. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a left sectional view of the present invention; Figure 4 This is a front sectional view of the present invention; Figure 5 This is an enlarged schematic diagram of the structure of the water-blocking plate of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the structure of the water-blocking plate of the present invention; Figure 7 This is an enlarged schematic diagram of the structure of the water-blocking plate of the present invention. Figure 2 ; Figure 8 This is an enlarged schematic diagram of the air replenishment mechanism of the present invention; Figure 9 This is an enlarged schematic diagram of the buoyancy mechanism of the present invention.

[0022] In the picture: Well body 1, drain pipe 101, partition net 102, sewage inlet pipe 103, fixing sleeve 2, through hole 201, sewage pipe 3, fixing plate 4, water blocking plate 5, water baffle 501, sliding groove 502, water leakage groove 503, movable groove 504, adjusting plate 505, limiting groove 506, threaded rod 507, knob 508, scale groove 509, buoyancy mechanism 6, movable plate 601, horizontal plate 602, connecting plate 603, screw 604, airbag 605, clamp 606, connecting rod 607, air replenishment mechanism 7, connecting pipe 701, first connecting sleeve 702, branch pipe 703, fixing pipe 704, second connecting sleeve 705, air inflator 706. Detailed Implementation

[0023] Example 1: like Figure 1-9 As shown, an adaptive rainwater and sewage separation device for intercepting wells includes a well body 1, which refers to the existing intercepting well structure. A drain pipe 101 is horizontally provided on one side of the well body 1. The drain pipe 101 is used to discharge rainwater and is preferably an existing rainwater drainage pipe. A mesh 102 is welded to the end of the drain pipe 101. The mesh 102 is preferably made of 304 stainless steel to prevent impurities from entering the drain pipe 101 and causing blockage. The mesh 102 can be installed as needed.

[0024] A sewage inlet pipe 103 is horizontally embedded on the other side of the well body 1. The sewage inlet pipe 103 is used to introduce sewage. A fixing sleeve 2 is cast inside the well body 1. The fixing sleeve 2 has a U-shaped cross-section and is preferably welded from 304 stainless steel plate. The fixing sleeve 2 fits against the inner wall of the well body 1 to form a closed flow chamber. The port of the sewage inlet pipe 103 is connected to the flow chamber to ensure that sewage can only flow in through the flow chamber. The bottom end of the fixing sleeve 2 is 100-200mm higher than the bottom end of the well body 1, forming a through hole 201. After the sewage enters the flow chamber, it falls along the inner wall of the flow chamber to the through hole 201, and then flows to the bottom end of the well body 1. Finally, it is discharged through the sewage pipe 3 connected to the well body 1. The sewage pipe 3 is connected to the sewage treatment plant.

[0025] Two fixing plates 4 are welded to the inner side of the well body 1. The fixing plates 4 are preferably Q235 steel plates. The two fixing plates 4 are located on the left and right sides of the opening of the sewage pipe 3, and are perpendicular to the inner wall of the well body 1. A water-blocking plate 5 is slidably connected between the two fixing plates 4. The water-blocking plate 5 is preferably 304 stainless steel plate. One side of the water-blocking plate 5 is in close contact with the opening of the sewage pipe 3 to adjust the drainage area of ​​the sewage pipe 3.

[0026] The water-blocking plate 5 includes a water-blocking plate 501. Each of the two fixed plates 4 has a sliding groove 502 on one side. The sliding groove 502 is rectangular and fits the water-blocking plate 501. Both ends of the water-blocking plate 501 are embedded in the sliding groove 502 and slide along it. A water-draining groove 503 is provided at the top of the water-blocking plate 501. The water-draining groove 503 is rectangular. After the water-blocking plate 501 is raised, the water-draining groove 503 aligns with the opening of the sewage pipe 3, forming a water-draining hole, ensuring that some sewage can flow into the sewage pipe 3 through the water-draining hole. Six to ten rolling balls are evenly embedded at the connection between the water-blocking plate 501 and the sliding groove 502. The rolling balls are preferably made of GCr15 bearing steel. A groove matching the rolling balls is provided inside the sliding groove 502, extending the rolling balls into the groove to reduce sliding friction between the water-blocking plate 501 and the sliding groove 502, making the water-blocking plate 5 rise and fall more smoothly.

[0027] A movable groove 504 is provided on the side of the baffle plate 501 near the drain pipe 3. The movable groove 504 is a rectangular groove and is connected to the drain groove 503. Two limiting grooves 506 are provided on the inner side of the baffle plate 501. The limiting grooves 506 are rectangular grooves and are located on both sides of the movable groove 504, extending to both sides of the drain groove 503. An adjusting plate 505 is slidably connected inside the movable groove 504. The adjusting plate 505 is preferably made of 304 stainless steel plate. The adjusting plate 505 can slide along the movable groove 504 and extend into the interior of the drain groove 503 to adjust the area of ​​the drain hole. Limiting strips are integrally formed on both sides of the adjusting plate 505. The limiting strips are rectangular strips and are slidably connected inside the limiting grooves 506 to prevent the adjusting plate 505 from shifting when sliding.

[0028] A threaded rod 507 is provided in the limiting groove 506. The threaded rod 507 passes through the limiting strip and is threadedly connected to the limiting strip. Both ends of the threaded rod 507 are smooth sections and are rotatably connected to the baffle plate 501 through a 6201 deep groove ball bearing. The top of the threaded rod 507 passes through the baffle plate 501 and is welded with a knob 508. The surface of the knob 508 is provided with anti-slip texture. Rotating the knob 508 can drive the threaded rod 507 to rotate, thereby driving the adjusting plate 505 to slide along the movable groove 504 to adjust the area of ​​the leakage hole. The side of the adjusting plate 505 is provided with a scale groove 509. The user can judge the area of ​​the leakage hole after adjustment by using the scale groove 509. The markings on the scale groove 509 are obtained through testing and calculation during production and are marked according to the test results.

[0029] The water-blocking plate 5 can move between a high position and a low position. The low position is when the water-blocking plate 501 does not completely block the opening of the sewage pipe 3, allowing the sewage pipe 3 to drain water over the largest area. The high position is when the water-blocking plate 5 completely blocks the opening of the sewage pipe 3, allowing sewage to be discharged only through the leakage hole between the water-blocking plate 501 and the sewage pipe 3. Rainwater is mainly discharged through the drain pipe 101. The sliding range between the low and high positions is controlled by the sliding groove 502.

[0030] Both sides of the water-blocking plate 5 are provided with buoyancy mechanisms 6, which are used to raise and lower the water-blocking plate 5 by means of the buoyancy of the water. The buoyancy mechanisms 6 are located at the upper ends of both ends of the water-blocking plate 5, specifically at the top of both sides of the water-blocking plate 501. When the water-blocking plate 5 is not moved to a high position, the buoyancy mechanism 6 is affected by the buoyancy of the water and drives the water-blocking plate 5 to rise and fall. The top surface of the water-blocking plate 5 is not higher than the water surface, so that sewage can normally pass over the water-blocking plate 5 and flow into the sewage pipe 3.

[0031] The buoyancy mechanism 6 includes a movable plate 601 welded to the side of the water-blocking plate 5. The movable plate 601 is preferably made of 304 stainless steel. The movable plate 601 is located on the side of the fixed plate 4 and is parallel to the fixed plate 4. An air bladder 605 is provided on the side of the movable plate 601 away from the fixed plate 4. The air bladder 605 is preferably made of butyl rubber and is filled with compressed air to provide buoyancy. A horizontal plate 602 is bonded to the top of the air bladder 605. The horizontal plate 602 is preferably made of 304 stainless steel and is used to uniformly transmit buoyancy.

[0032] A connecting plate 603 is welded to the horizontal plate 602, and a connecting rod 607 is welded to the bottom of the connecting plate 603. The connecting rod 607 has a T-shaped cross-section. A connecting groove is opened on the side of the movable plate 601 near the airbag 605. The connecting groove is a T-shaped groove that matches the connecting rod 607. The connecting rod 607 is embedded in the connecting groove to achieve the initial connection between the connecting plate 603 and the movable plate 601. The connecting plate 603 and the movable plate 601 are fixed together by two screws 604 to ensure a stable connection. A clamp 606 is fixed on the side of the connecting rod 607 near the airbag 605. The inner diameter of the clamp 606 matches the outer diameter of the airbag 605. The clamp 606 is sleeved on the outer periphery of the airbag 605 to prevent the airbag 605 from shifting.

[0033] The airbag 605 is equipped with an air replenishment mechanism 7 to replenish the airbag 605 with gas, preventing the airbag 605 from losing buoyancy due to long-term air leakage and preventing scale buildup on the airbag surface from causing a decrease in buoyancy. The air replenishment mechanism 7 includes a connecting pipe 701 threadedly connected to the airbag 605; a first connecting sleeve 702 is welded to the top of the fixing plate 4, and the connecting pipe 701 slides through the first connecting sleeve 702, sliding synchronously with the rise and fall of the airbag 605; the top of the connecting pipe 701 is connected to a branch pipe 703 via a tee connector, preferably a DN15 stainless steel pipe; the branch pipe 703 is located away from the connecting pipe 701. One end is connected to a fixed pipe 704, preferably a DN20 stainless steel pipe; 1-3 second connecting sleeves 705 are welded to the inner wall of the well body 1, and the fixed pipe 704 slides through the second connecting sleeves 705 to ensure that the fixed pipe 704 is vertical; the top end of the fixed pipe 704 extends to the top of the well body 1, higher than the top of the well body 1, and is threadedly connected to an inflation connector 706, preferably made of brass, with a built-in one-way valve to prevent gas leakage from the airbag 605. When gas needs to be replenished, an external inflation device is connected to the inflation connector 706 to replenish gas into the airbag 605.

[0034] Example 2: The specific steps for using the adaptive rainwater and sewage separation device in the intercepting well are as follows: S1: Device Installation and Parameter Testing The well body 1 is cast according to the design drawings at the intercepting well location next to the municipal road, ensuring that the well body 1 is vertical, the drainage pipe 101 faces the river, the sewage pipe 3 is connected to the sewage treatment plant network, and the sewage inlet pipe 103 is connected to the municipal sewage network. After installation, the sealing performance of each pipe is tested. Clean water is injected into the well body 1 until it covers the opening of the sewage pipe 3. Observe for 24 hours. If there is no leakage in the well body 1 and the pipes, the sealing performance is qualified. At the same time, the lifting and lowering flexibility of the water blocking plate 5 is tested. The water blocking plate 5 is manually pushed up and down along the slide groove 502 to ensure that there is no jamming. The sealing performance of the airbag 605 is tested. The airbag 605 is inflated to a pressure of 0.2MPa through the inflation connector 706. After the inflation equipment is turned off, it is observed for 12 hours. If the pressure does not drop, the sealing performance of the airbag 605 is qualified.

[0035] S2: Minimum outflow area calculation Based on the drainage design parameters of the interceptor well's service area, the minimum outflow area during rainfall is calculated. The formula for calculating the minimum outflow area is as follows: ; In the formula: To minimize the outflow area, For design traffic, The orifice outflow coefficient is preferably 0.62. For a rectangular orifice, g is the acceleration due to gravity, and H is... The distance from the centroid to the top of the intercepting well; in, ; In the formula: K is the coefficient of variation of comprehensive domestic sewage volume, preferably 1.4. To design the comprehensive domestic sewage volume, The coefficient for variation of industrial wastewater volume is preferably 1.2. To design industrial wastewater volume, The optimal infiltration rate is 10% of the sum of the designed total domestic sewage and industrial wastewater volume. To retain rainwater, calculations are performed based on the local rainstorm intensity formula; S3: Drainage hole area adjustment Based on the minimum outflow area calculated by S2, adjust the area of ​​the water leakage hole formed by the water-blocking plate 5 and the drain pipe 3 when the water-blocking plate 5 is moved to the high position so that it is not less than the minimum outflow area. The specific adjustment process is as follows: rotate the knob 508 on the top of the water-blocking plate 5 to drive the threaded rod 507 to rotate. The threaded rod 507 drives the adjusting plate 505 to slide along the movable groove 504 through the threaded transmission, and adjusts the length of the adjusting plate 505 extending into the water leakage groove 503. Until the area of ​​the water leakage hole indicated by the scale groove 509 reaches or is slightly greater than the minimum outflow area, stop rotating the knob 508 to complete the adjustment of the water leakage hole area.

[0036] S4: Sewage discharge on sunny days After the pipeline is connected, on sunny days, municipal sewage enters the flow chamber of well body 1 through sewage inlet pipe 103, falls down along the flow chamber to through hole 201, and then flows to the bottom of well body 1. At this time, the water level in well body 1 is low, the buoyancy of buoyancy mechanism 6 is small, the water baffle 5 is in a low position, and does not block the opening of sewage pipe 3 at all. At the same time, there is no drainage from drainage pipe 101. Sewage flows to sewage treatment plant through sewage pipe 3, realizing the separate discharge of sewage.

[0037] S5: Separation of rainwater and sewage in rainy weather During rainy weather, rainwater and sewage enter well 1 together, causing the water level in well 1 to rise. As the water level rises, the buoyancy of the airbag 605 of the buoyancy mechanism 6 gradually increases, driving the water-blocking plate 5 to rise along the slide 502. During the rise of the water-blocking plate 5, it gradually blocks the opening of the sewage pipe 3, reducing the area through which rainwater is discharged. At the same time, the water-leaking groove 503 at the top of the water-blocking plate 5 forms a water-leaking hole with the sewage pipe 3, and sewage flows into the sewage pipe 3 through the water-leaking hole. When the water level rises to the preset high level, the water-leaking hole reaches the minimum outflow area. At this time, the rainwater drain pipe 101 discharges, while the sewage continues to be discharged through the water-leaking hole and the sewage pipe 3, achieving rainwater and sewage separation. After the rain stops, the water level in well 1 drops, the buoyancy of the buoyancy mechanism 6 decreases, and the water-blocking plate 5 descends to the low position along the slide 502 under its own weight, restoring the sewage discharge state during sunny days.

[0038] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An adaptive rainwater and sewage separation device for intercepting wells, characterized in that: Includes a well body (1), and a sewage pipe (3) is provided on one side of the well body (1); Two fixing plates (4) are provided on the inner side of the well body (1), and the two fixing plates (4) are located on both sides of the opening of the sewage pipe (3); A water-blocking plate (5) is slidably connected between the two fixed plates (4), and the water-blocking plate (5) is in close contact with the opening of the sewage pipe (3); The water-blocking plate (5) is provided with buoyancy mechanisms (6) on both sides. The buoyancy mechanisms (6) are used to raise and lower the water-blocking plate (5) by means of the buoyancy of the water.

2. The adaptive rainwater and sewage separation device for intercepting wells according to claim 1, characterized in that: The water-blocking plate (5) moves between the high position and the low position. When it is in the low position, the water-blocking plate (5) does not block the opening of the sewage pipe (3) at all. When it is in a high position, the water-blocking plate (5) covers the opening of the sewage pipe (3).

3. The adaptive rainwater and sewage separation device for intercepting wells according to claim 2, characterized in that: A drain pipe (101) is provided on one side of the well body (1), and a mesh (102) is provided at the end of the drain pipe (101). A sewage inlet pipe (103) is provided on the other side of the well body (1), and a fixing sleeve (2) is provided inside the well body (1). The fixed sleeve (2) has a U-shaped cross-section and forms a water flow chamber with the well body (1); the sewage inlet pipe (103) is connected to the water flow chamber; The bottom end of the fixed sleeve (2) is higher than the bottom end of the well body (1), forming a through hole (201). After entering, the sewage first flows through the water chamber and falls into the through hole (201), flows to the bottom of the well body (1), and is finally discharged through the sewage pipe (3).

4. The adaptive rainwater and sewage separation device for intercepting wells according to claim 2, characterized in that: The buoyancy mechanism (6) is located at the upper ends of both ends of the water-blocking plate (5); When the water-blocking plate (5) is not moved to a high position, the buoyancy mechanism (6) is affected by the buoyancy of the water and drives the water-blocking plate (5) to rise and fall, and the top surface of the water-blocking plate (5) is not higher than the water surface.

5. The adaptive rainwater and sewage separation device for intercepting wells according to claim 1, characterized in that: The water-blocking plate (5) includes a water-blocking plate (501), and two fixed plates (4) are provided with sliding grooves (502). The sliding grooves (502) are adapted to the water-blocking plate (501), and the two ends of the water-blocking plate (501) are slidably connected to the inside of the sliding grooves (502). The top of the baffle plate (501) is provided with a water leakage groove (503); After the baffle plate (501) is raised, the water leakage channel (503) and the sewage pipe (3) form a water leakage hole; Several rolling balls are provided at the connection between the baffle plate (501) and the chute (502). The chute (502) is provided with a chute, and the rolling balls extend into the chute.

6. The adaptive rainwater and sewage separation device for intercepting wells according to claim 5, characterized in that: The baffle plate (501) is provided with a movable groove (504) on the side near the drain pipe (3), and the movable groove (504) is connected to the leakage groove (503); The inner side of the baffle plate (501) is provided with two limiting grooves (506), which are located on both sides of the movable groove (504) and extend to both sides of the leakage groove (503); An adjusting plate (505) is slidably connected inside the movable groove (504), and the adjusting plate (505) extends slidably into the interior of the drain groove (503); the edge of the adjusting plate (505) is provided with a limiting strip, and the limiting strip is slidably connected to the interior of the limiting groove (506); The limiting groove (506) is provided with a threaded rod (507), which passes through the limiting strip and is threadedly connected to the limiting strip; The two ends of the threaded rod (507) are smooth and rotatably connected to the baffle plate (501); The top of the threaded rod (507) passes through the baffle plate (501) and is equipped with a knob (508). The adjustment plate (505) has a scale groove (509) on its side.

7. The adaptive rainwater and sewage separation device for intercepting wells according to claim 1, characterized in that: The buoyancy mechanism (6) includes a movable plate (601) fixed to the side of the water-blocking plate (5); The movable plate (601) is located on the side of the fixed plate (4); An airbag (605) is provided on the side of the movable plate (601) away from the fixed plate (4); A cross plate (602) is fixed to the top of the airbag (605); The horizontal plate (602) is provided with a connecting plate (603), and the bottom of the connecting plate (603) is provided with a connecting rod (607). The movable plate (601) has a connecting groove on the side near the airbag (605), and the connecting rod (607) is adapted to the connecting groove. The cross-section of the connecting rod (607) is T-shaped. The connecting plate (603) and the movable plate (601) are fixed together by screws (604); The connecting rod (607) is provided with a clamp (606) on the side near the airbag (605), and the clamp (605) is sleeved on the outer periphery of the airbag (605).

8. The adaptive rainwater and sewage separation device for intercepting wells according to claim 7, characterized in that: The airbag (605) is equipped with an air replenishment mechanism (7) for replenishing the airbag (605) with gas; The air replenishment mechanism (7) includes a connecting tube (701) connected to the airbag (605); The top of the fixing plate (4) is provided with a first connecting sleeve (702), and the connecting tube (701) slides through the first connecting sleeve (702); The top end of the connecting pipe (701) is connected to the fixed pipe (704) via the branch pipe (703). The inner wall of the well body (1) is provided with several second connecting sleeves (705), and the fixed pipe (704) slides through the second connecting sleeves (705); The top of the fixed pipe (704) is located above the well body (1) and is equipped with an air inlet (706). The inflation connector (706) has a built-in check valve.

9. A method of using the adaptive rainwater and sewage separation device of the intercepting well according to any one of claims 1-8, characterized in that: Includes the following steps: S1. Install the device at the designed location and test the parameters after installation; S2. Calculate the minimum outflow area during rainfall; S3. Adjust the area of ​​the water leakage hole formed by the water blocking plate (5) and the sewage pipe (3) when the water blocking plate (5) is moved to the high position according to the minimum outflow area, so that it is not less than the minimum outflow area; S4. The pipeline is connected, and the sewage enters normally and flows to the sewage treatment plant through the sewage pipe (3). S5. During rainy days, the water flow increases and the water level rises. The air bladder (605) of the buoyancy mechanism (6) is affected by buoyancy and drives the water blocking plate (5) to rise, blocking part of the sewage pipe (3) and forming a leak hole. Rainwater is discharged through the drain pipe (101), and sewage is discharged through the drain hole.

10. The method of using the adaptive rainwater and sewage separation device of the intercepting well according to claim 9, characterized in that: in In S2, the minimum outflow area is: ； In the formula: To minimize the outflow area, For design traffic, H is the orifice outflow coefficient. The distance from the centroid to the top of the intercepting well; ； In the formula: K is the coefficient of variation of comprehensive domestic sewage volume. To design the comprehensive domestic sewage volume, This is the coefficient for the change in industrial wastewater volume. To design industrial wastewater volume, This refers to the amount of groundwater that infiltrates. To intercept rainwater.

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