Decontamination and energy dissipation type split road rainwater inlet device and method

Abstract

A kind of sewage interception energy dissipation type separate road rainwater inlet device and method, by being connected with each other in the well wall of rainwater well chamber Drain pipe and reflux pipe, well mouth is provided with sewage interceptor, energy dissipation mechanism is communicated with the lower end of sewage interceptor and is in the state of suspension, the space between drain pipe and well bottom forms silt groove, the height of the lower end of energy dissipation mechanism is at the water inlet of drain pipe, the water inlet of reflux pipe is towards the wall of sewage interceptor, support is pressed in the shoulder of sewage interceptor, rainwater grate is located on the support and is communicated with sewage interceptor, filter hole is arranged on rainwater grate, the lower end of energy dissipation mechanism is elastically connected with diffusion plate, rainwater passes through rainwater grate and support and enters sewage interceptor, sewage interceptor filters and blocks small sundry particles, sewage is discharged into silt groove, water collecting hopper collects sewage and forms potential energy, impact diffusion plate is reduced, diffusion plate guides sewage to the diffusion of well chamber all around, reduces the impact on sludge sediment layer in silt groove, avoids sludge into pipe network to cause secondary pollution, it is convenient and simple to clean up dirt and sludge, and maintenance cost is low.

Description

Technical Field

[0001] This invention belongs to the field of sewage interception and containment technology for drainage pipe networks, and relates to a sewage interception and energy dissipation type separate road storm drain inlet device and method. Background Technology

[0002] Common types of storm drains include flat grate, vertical grate, and combined types. All storm drains are equipped with storm grates, through which rainwater flows into the drain and then into the city's underground pipe network. However, most storm grates cannot trap most fine particles in the rainwater. During collection and transportation, garbage, impurities, and dirt inevitably accumulate in the pipes. While existing new types of storm drains, such as intercepting baskets, can trap some debris, cleaning them is difficult and labor-intensive, hindering daily operation and maintenance. Furthermore, during heavy rainfall, the sediment at the bottom can be washed up by the high-velocity water flow and re-enter the storm drain, causing secondary pollution. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a separate road storm drain device and method with intercepting sewage and dissipating energy. The device employs a system where a drain pipe and a return pipe are interconnected on the wall of the storm drain chamber. A sewage interception hopper is installed at the well opening. An energy dissipation mechanism is connected to the lower end of the sewage interception hopper and is suspended in mid-air. The space between the drain pipe and the bottom of the well forms a sedimentation trough. The lower end of the energy dissipation mechanism is positioned at the inlet of the drain pipe. The inlet of the return pipe faces the wall of the sewage interception hopper. A support is pressed against the shoulder of the sewage interception hopper. The storm drain grate is positioned... The system is connected to the intercepting hopper on the support. Filter holes are installed on the rainwater grate. A diffuser plate is elastically connected to the lower end of the energy dissipation mechanism. Rainwater passes through the rainwater grate and the support and enters the intercepting hopper. The intercepting hopper filters and blocks fine debris particles. Sewage is discharged into the sedimentation tank. The water collection hopper collects sewage and forms potential energy that flows down to impact the diffuser plate. The diffuser plate guides the sewage to diffuse around the well chamber, reducing the impact on the sludge deposit layer in the sedimentation tank and preventing sludge from entering the pipe network and causing secondary pollution. Cleaning sewage and sludge is convenient and simple, and the maintenance cost is low.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a sewage interception and energy dissipation type separate road storm drain device, which includes a sewage interception hopper, an energy dissipation mechanism, a drain pipe and a return pipe; the water inlet of the energy dissipation mechanism is connected to the bottom of the sewage interception hopper, the water inlet of the return pipe is located on one side of the hopper wall outside the sewage interception hopper, the water outlet of the return pipe is radially connected to the drain pipe, and the water outlet of the drain pipe is laterally perpendicular to the energy dissipation mechanism; the height of the diffuser plate at the lower end of the energy dissipation mechanism is between the water inlets of the drain pipe.

[0005] The intercepting hopper is a hollow cylindrical structure with an open top. Multiple filter holes are provided on the bottom and wall of the cylinder, and the multiple filter holes on the bottom of the cylinder are all located inside the water inlet of the energy dissipation mechanism.

[0006] The opening end of the intercepting hopper extends outward to form a shoulder; the support legs on the lower side of the flat plate structure are located outside the shoulder, and the lower side of the support presses against the opening end of the intercepting hopper.

[0007] A rainwater grate is fitted into the annular groove on the upper side of the support, and the grid of the rainwater grate is located above the through hole of the support.

[0008] The side of the bucket shoulder is provided with two symmetrical shaft holes. The open end of the U-shaped lifting handle is engaged with the shaft holes and rotates around the shaft holes.

[0009] The energy dissipation mechanism includes a hollow conical water collection hopper, with the lower end of the water collection hopper, which has a smaller cross-section, connected to a straight pipe section.

[0010] Multiple suspension cables are installed at the lower end of the straight pipe section. The diffuser plate is connected and fixed to the suspension cables. The upper side of the diffuser plate is parallel to the lower end face of the straight pipe section and does not contact each other to form a diffusion space.

[0011] The suspension cable is an elastic cable, which causes the diffuser plate to spring back upward after being impacted.

[0012] The drain pipe and return pipe are perpendicular to each other, and the inlet at the upper end of the return pipe is bent to one side and deflected toward the intercepting hopper.

[0013] The method for intercepting and dissipating sewage and energy in a separated road storm drain inlet device as described above includes the following steps:

[0014] S1, Install the drain pipe by installing it on the wall of the rainwater well chamber; the drain pipe is laterally perpendicular to the well wall and its height is higher than the bottom of the well; in this step, the space between the bottom of the well and the inlet of the drain pipe forms a sedimentation trough.

[0015] S2, Install the return pipe. Install the return pipe inside the well wall. The lower end of the return pipe is radially connected to the drainage pipe and the lower end of the return pipe is connected to the rainwater well chamber.

[0016] S3, Install the intercepting hopper, place the intercepting hopper in the rainwater well chamber, and let the hopper shoulder fit into the groove at the upper end of the rainwater well chamber and be supported by the groove; in this step, the energy dissipation mechanism and the intercepting hopper are connected as a whole, the energy dissipation mechanism is suspended in the rainwater well chamber, and the water inlet of the drain pipe faces the lower end of the energy dissipation mechanism.

[0017] S4, Pressing and Limiting: First, rotate the lifting handle to position it in the groove at the upper end of the rainwater well chamber, then fasten the support onto the shoulder of the intercepting hopper, and the rainwater grate engages with the annular groove on the upper side of the support; in this step, the support presses and limits the intercepting hopper.

[0018] S5, interception of sewage: rainwater carrying fine debris particles passes through the grid of the rainwater grate and the through holes of the support and enters the interception hopper. Sewage leaks out from the filter holes of the interception hopper into the rainwater well chamber. Fine debris particles are blocked in the interception hopper. In this step, the sludge carried by the sewage entering the rainwater well chamber gradually sinks to the bottom of the sedimentation tank and forms a new sludge layer with the original sediment.

[0019] S6, Energy Dissipation: In S5, some sewage enters the water collection hopper of the energy dissipation mechanism from the bottom of the intercepting hopper. The conical water collection hopper collects the potential energy and then discharges vertically downwards to impact the diffusion plate. The diffusion plate guides the sewage to diffuse and dissipate energy around the perimeter of the rainwater well chamber. In this step, when the energy-dissipated sewage falls into the sedimentation tank, the impact on the newly deposited sludge layer is reduced, preventing sludge from entering the drainage pipe with the sewage and causing secondary pollution. At the same time, under the impact of the sewage, the diffusion plate rebounds upwards, further expanding the range of sewage diffusion and further reducing the impact on the sludge layer.

[0020] S7, Sewage Discharge: As sewage continuously enters the sedimentation tank, when the water level reaches the inlet of the drainage pipe, the sewage is discharged from the drainage pipe into the pipe network. In this step, when there is heavy rainfall, the water level continues to rise beyond the inlet of the drainage pipe and reaches the inlet of the return pipe. Sewage then enters the drainage pipe from the return pipe to avoid water backflow.

[0021] S8, cleaning and sludge removal: remove the rainwater grate and support in sequence, rotate the lifting handle and apply upward lifting force to remove the intercepting hopper and energy dissipation mechanism, pour out the fine debris particles in the intercepting hopper and transfer them to the waste treatment plant; use a sludge pump to pump the sludge in the settling tank to the sludge truck and transfer it to the sludge treatment plant.

[0022] The beneficial effects of this invention are mainly reflected in:

[0023] The intercepting hopper is supported by the wellhead of the rainwater well chamber and held in place by a support. The rainwater grate is located on the upper part of the support and is connected to the intercepting hopper, which improves the stability of the intercepting hopper and correspondingly improves the stability of the energy dissipation mechanism that is suspended below the intercepting hopper and connected to it.

[0024] The drain pipe and return pipe are connected to each other inside the wall of the rainwater well chamber. The inlet of the return pipe faces the wall of the intercepting hopper. When the water level in the well chamber exceeds the drain pipe and reaches the inlet of the return pipe, the sewage enters the drain pipe from the return pipe, thus preventing water backflow.

[0025] The hopper walls and bottom are equipped with filter holes. When fine particles of debris carried by rainwater enter the hopper, the hopper will block the fine particles of debris in its cavity.

[0026] When rainwater carrying larger debris passes through the rain grate, it is blocked outside the manhole by the grille on the rain grate, preventing it from entering the manhole and causing blockage.

[0027] The water collection hopper of the energy dissipation mechanism collects sewage to generate potential energy, which impacts the diffuser plate. The diffuser plate guides the sewage to diffuse around the well chamber, reducing the impact on the sludge deposition layer in the sedimentation tank and preventing sludge from entering the pipe network with the sewage and causing secondary pollution.

[0028] The diffuser plate is suspended below the straight pipe section and elastically connected by suspension cables. When sewage impacts the diffuser plate, it rebounds and collides with the downward force of the sewage, which helps to further increase the range of sewage diffusion to the surrounding area of ​​the well chamber.

[0029] When cleaning sewage and sludge, simply remove the rain grate and support, and pull out the intercepting hopper and energy dissipation mechanism by applying the lifting force of the lifting handle. Clean the fine particles in the intercepting hopper, and use the sludge pump on the sludge truck to extract the sludge from the settling tank. The operation is simple and convenient, and the maintenance cost is low. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0031] Figure 1 This is a schematic diagram of the structure of the present invention.

[0032] Figure 2 This is a schematic diagram showing the fit between the shoulder of the intercepting hopper of the present invention and the wellhead of the rainwater well chamber.

[0033] Figure 3 This is a schematic diagram of the energy dissipation mechanism of the present invention.

[0034] In the diagram: 1. Sewage interception hopper, 11. Filter hole, 12. Shoulder, 13. Support, 14. Rain grate, 15. Lifting handle, 2. Energy dissipation mechanism, 21. Water collection hopper, 22. Straight pipe section, 23. Suspension cable, 24. Diffuser plate, 3. Drainage pipe, 4. Return pipe. Detailed Implementation

[0035] like Figures 1-3 A separate road storm drain device with intercepting and dissipating energy is disclosed. It includes an intercepting hopper 1, an energy dissipation mechanism 2, a drain pipe 3, and a return pipe 4. The inlet of the energy dissipation mechanism 2 is connected to the bottom of the intercepting hopper 1. The inlet of the return pipe 4 is located on one side of the hopper wall outside the intercepting hopper 1, and the outlet of the return pipe 4 is radially connected to the drain pipe 3. The outlet of the drain pipe 3 is laterally perpendicular to the energy dissipation mechanism 2. The height of the diffuser plate 24 at the lower end of the energy dissipation mechanism 2 is between the inlets of the drain pipe 3 and the outlet of the drain pipe 3. In use, rainwater passes through the storm drain grate 14 and support 13 into the intercepting hopper 1. The intercepting hopper 1 filters and blocks fine debris particles, and the sewage is discharged into the sedimentation tank. The collecting hopper 21 collects the sewage, generating potential energy that flows downwards and impacts the diffuser plate 24. The diffuser plate 24 guides the sewage to diffuse around the chamber, reducing the impact on the sludge deposit layer in the sedimentation tank and preventing sludge from entering the pipe network and causing secondary pollution. Cleaning is convenient and simple, and maintenance costs are low.

[0036] In a preferred embodiment, the intercepting hopper 1 is a hollow cylindrical structure with an open top. Multiple filter holes 11 are provided on the bottom and wall of the hopper, with all filter holes 11 located inside the water inlet of the energy dissipation mechanism 2. During use, when rainwater carrying fine particles enters the intercepting hopper 1, the particles are trapped inside. Some wastewater drips through the filter holes 11 on the side of the hopper wall into the well chamber, while some wastewater passes through the filter holes 11 at the bottom of the hopper and enters the water collection hopper 21.

[0037] Preferably, the wall of the intercepting hopper 1 is close to the inner wall of the well chamber. When sewage is ejected from the filter hole 11 on the side of the hopper wall, it impacts the inner wall of the well chamber and flows down along the inner wall of the well chamber, reducing the disturbance to the water in the sedimentation tank and thus avoiding stirring up the sludge deposited in the sedimentation tank.

[0038] In a preferred embodiment, the open end of the intercepting hopper 1 extends outward to form a shoulder 12; the support leg on the lower side of the flat plate support 13 is located outside the shoulder 12, and the lower side of the support 13 presses against the open end of the intercepting hopper 1. During installation, the shoulder 12 of the intercepting hopper 1 mates with the wellhead groove of the rainwater well chamber, and the support 13 exerts a pressing force on the shoulder 12 to improve the stability of the intercepting hopper 1, thereby correspondingly improving the stability of the energy dissipation mechanism 2 connected to the lower end of the intercepting hopper 1.

[0039] Preferably, the support 13 adopts a structure that fits with the wellhead to press and hold the intercepting hopper 1, which is easy to remove and facilitates rapid cleaning of sludge and mud in the later stage.

[0040] In a preferred embodiment, a rain grate 14 is fitted into the annular groove on the upper side of the support 13, and the grid of the rain grate 14 is located above the through hole of the support 13. During use, when rainwater carrying various debris passes through the rain grate 14, larger debris is blocked outside the rainwater well by the grid of the rain grate 14, preventing it from entering the rainwater well chamber and causing blockage.

[0041] In a preferred embodiment, two symmetrical shaft holes are provided on the side of the shoulder 12. The open end of the U-shaped lifting handle 15 engages with the shaft holes and rotates around them. During installation, the lifting handle 15 rotates around the shaft holes on the shoulder 12 and shifts to one side to be placed inside the shoulder 12. When it needs to be removed, the intercepting hopper 1 and the energy dissipation mechanism 2 are removed by applying an upward lifting force to the lifting handle 15. The operation is simple, convenient, and low in cost.

[0042] In a preferred embodiment, the energy dissipation mechanism 2 includes a hollow conical water collection hopper 21, with the lower end of the water collection hopper 21, which has a smaller cross-section, connected to a straight pipe section 22. During use, when sewage enters the water collection hopper 21, if the amount of sewage entering the hopper 21 exceeds the discharge volume, the sewage generates potential energy within the hopper 21, which helps to increase the impact force during sewage discharge.

[0043] In a preferred embodiment, multiple suspension cables 23 are installed at the lower end of the straight pipe section 22. The diffuser plate 24 is connected and fixed to the suspension cables 23. The upper side of the diffuser plate 24 is parallel to and does not contact the lower end face of the straight pipe section 22, forming a diffusion space. During use, the discharged sewage impacts the diffuser plate 24, which guides the sewage and diffuses it from the diffusion space to the surrounding area of ​​the well chamber. This reduces the impact and disturbance of the sewage on the water in the sedimentation tank, thereby avoiding the stirring up of the sludge deposited in the sedimentation tank and preventing the sludge from entering the pipe network from the drain pipe 3 and causing secondary pollution.

[0044] In a preferred embodiment, the suspension cable 23 is an elastic cable that causes the diffuser plate 24 to rebound upwards after being impacted. In use, the suspension cable 23 is an elastic cable; when the diffuser plate 24 is impacted, the suspension cable 23 pulls the diffuser plate 24 back, causing it to collide with the downward-flowing sewage. This helps to increase the range of sewage diffusion into the well chamber, thereby further reducing disturbance to the upper water layer of the sedimentation tank.

[0045] In the preferred embodiment, the drain pipe 3 and the return pipe 4 are perpendicular to each other, and the inlet at the upper end of the return pipe 4 is bent to one side and deflected toward the intercepting hopper 1. During use, when sewage in the rainwater well chamber passes over the drain pipe 3, the sewage enters the pipe network from the drain pipe 3; during heavy rainstorms, when the sewage level exceeds the drain pipe 3 and reaches the inlet of the return pipe 4, the sewage enters the drain pipe 3 from the return pipe 4, thus preventing backflow.

[0046] In a preferred embodiment, the method for intercepting and dissipating sewage and energy in a separated road storm drain device as described above includes the following steps:

[0047] S1, Install the drain pipe 3 on the well wall of the rainwater well chamber; the drain pipe 3 is perpendicular to the well wall on the side, and the height of the drain pipe 3 is higher than the height of the bottom of the well; in this step, the space between the bottom of the well and the inlet of the drain pipe 3 forms a sedimentation trough.

[0048] S2, Install the return pipe. Install the return pipe 4 inside the well wall. The lower end of the return pipe 4 is radially connected to the drainage pipe 3, and the lower end of the return pipe 4 is connected to the rainwater well chamber.

[0049] S3, Install the intercepting hopper, place the intercepting hopper 1 in the rainwater well chamber, the hopper shoulder 12 matches the groove at the upper end of the rainwater well chamber and is supported by the groove; in this step, the energy dissipation mechanism 2 and the intercepting hopper 1 are connected as a whole, the energy dissipation mechanism 2 is suspended in the rainwater well chamber, and the water inlet of the drain pipe 3 faces the lower end of the energy dissipation mechanism 2.

[0050] S4, Pressing and limiting: First, rotate the lifting handle 15 so that it is in the slot at the upper end of the rainwater well chamber, and then fasten the support 13 onto the shoulder 12 of the intercepting hopper 1. The rainwater grate 14 cooperates with the annular groove on the upper side of the support 13. In this step, the support 13 presses and limits the intercepting hopper 1.

[0051] S5, interception of sewage: rainwater carrying fine debris particles passes through the grid of the rainwater grate 14 and the through holes of the support 13 into the interception hopper 1. Sewage leaks out from the filter hole 11 of the interception hopper 1 into the rainwater well chamber. Fine debris particles are blocked in the interception hopper 1. In this step, the sludge carried by the sewage entering the rainwater well chamber gradually sinks to the bottom of the sedimentation tank and forms a new sludge layer with the original sedimented sludge.

[0052] S6, Energy Dissipation: In S5, some sewage enters the water collection hopper 21 of the energy dissipation mechanism 2 from the bottom of the intercepting hopper 1. The potential energy is collected by the conical structure of the water collection hopper 21 and then discharged vertically downwards to impact the diffuser plate 24. The diffuser plate 24 guides the sewage to diffuse and dissipate energy around the perimeter of the rainwater well chamber. In this step, when the sewage falls into the sedimentation tank after energy dissipation, the impact on the newly deposited sludge layer is reduced, preventing sludge from entering the drain pipe 3 with the sewage and causing secondary pollution. At the same time, under the impact of the sewage, the diffuser plate 24 rebounds upwards, further expanding the range of sewage diffusion and further reducing the impact on the sludge layer.

[0053] S7, Sewage discharge: As sewage continuously enters the sedimentation tank, when the water level reaches the inlet of the drainage pipe 3, the sewage is discharged from the drainage pipe 3 into the pipe network. In this step, when encountering heavy rainfall, the water level continues to rise beyond the inlet of the drainage pipe 3 and reaches the inlet of the return pipe 4. The sewage then enters the drainage pipe 3 from the return pipe 4 to avoid water backflow.

[0054] S8, clean and discharge sludge, remove the rain grate 14 and support 13 in sequence, rotate the lifting handle 15 and apply upward lifting force to remove the intercepting hopper 1 and energy dissipation mechanism 2, pour out the fine debris particles in the intercepting hopper 1 and transfer them to the waste treatment plant; use a sludge pump to pump the sludge in the settling tank to the sludge truck and transfer it to the sludge treatment plant.

[0055] The above method blocks larger debris outside the rainwater well and traps fine debris particles in the intercepting hopper 1. The diffuser plate 24 guides and diffuses the sewage, reducing the impact on the water in the sedimentation tank and preventing sludge from being stirred up and discharged into the pipe network, causing secondary pollution. The cleaning and sludge removal is convenient, quick, simple to operate, and low in cost.

[0056] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The embodiments and features described in these embodiments can be arbitrarily combined without conflict. 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. A sewage interception and energy dissipation type separate road storm drain inlet device, characterized in that: It includes a sludge interceptor (1), an energy dissipation mechanism (2), a drain pipe (3), and a return pipe (4); the inlet of the energy dissipation mechanism (2) is connected to the bottom of the sludge interceptor (1), the inlet of the return pipe (4) is located on one side of the sludge interceptor (1) outside the sludge interceptor (1), the outlet of the return pipe (4) is radially connected to the drain pipe (3), and the outlet of the drain pipe (3) is laterally perpendicular to the energy dissipation mechanism (2); the height of the diffuser plate (24) at the lower end of the energy dissipation mechanism (2) is between the inlets of the drain pipe (3); The energy dissipation mechanism (2) includes a hollow conical water collection hopper (21), and the lower end of the water collection hopper (21) with a smaller cross-section is connected to a straight pipe section (22). Multiple suspension cables (23) are provided at the lower end of the straight pipe section (22). The diffuser plate (24) is connected and fixed to the suspension cables (23). The upper side of the diffuser plate (24) is parallel to the lower end face of the straight pipe section (22) and does not contact each other to form a diffuser space. The suspension cable (23) is an elastic cable, which causes the diffuser plate (24) to bounce upward after being impacted; The intercepting hopper (1) is a hollow cylindrical structure with an open top. Multiple filter holes (11) are provided on the bottom and wall of the cylinder. All the filter holes (11) on the bottom of the cylinder are located inside the water inlet of the energy dissipation mechanism (2). The opening end of the intercepting hopper (1) extends outward to form a shoulder (12); the support leg on the lower side of the flat plate support (13) is located outside the shoulder (12), and the lower side of the support (13) presses against the opening end of the intercepting hopper (1); A rain grate (14) is fitted into the annular groove on the upper side of the support (13), and the grid of the rain grate (14) is located above the through hole of the support (13). The drain pipe (3) and return pipe (4) are perpendicular to each other, and the inlet at the upper end of the return pipe (4) is bent to one side and deflected toward the intercepting hopper (1).

2. The sewage interception and energy dissipation type separated road storm drain device according to claim 1, characterized in that: The side of the shoulder (12) is provided with two symmetrical shaft holes. The open end of the U-shaped lifting handle (15) is engaged with the shaft holes and rotates around the shaft holes.

3. The method for intercepting and dissipating sewage and energy using a separate road storm drain inlet device according to any one of claims 1 to 2, characterized in that, It includes the following steps: S1, Install the drain pipe (3) on the wall of the rainwater well chamber; the drain pipe (3) is perpendicular to the well wall and the height of the drain pipe (3) is higher than the height of the bottom of the well; in this step, the space between the bottom of the well and the inlet of the drain pipe (3) forms a sedimentation trough; S2, Install the return pipe, install the return pipe (4) inside the well wall, the lower end of the return pipe (4) is radially connected to the drainage pipe (3), and the lower end of the return pipe (4) is connected to the rainwater well chamber; S3, Install the intercepting hopper, place the intercepting hopper (1) in the rainwater well chamber, and the hopper shoulder (12) is matched with the slot at the upper end of the rainwater well chamber and supported by the slot; in this step, the energy dissipation mechanism (2) and the intercepting hopper (1) are connected as a whole, the energy dissipation mechanism (2) is suspended in the rainwater well chamber, and the inlet of the drain pipe (3) faces the lower end of the energy dissipation mechanism (2); S4, Pressing and limiting: First, rotate the lifting handle (15) to position it in the slot at the upper end of the rainwater well chamber, then fasten the support (13) onto the shoulder (12) of the intercepting hopper (1), and the rainwater grate (14) engages with the annular groove on the upper side of the support (13); in this step, the support (13) presses and limits the intercepting hopper (1); S5, interception of sewage: rainwater carrying fine debris particles passes through the grid of the rainwater grate (14) and the through holes of the support (13) into the interception hopper (1). Sewage leaks out from the filter hole (11) of the interception hopper (1) into the rainwater well chamber. Fine debris particles are blocked in the interception hopper (1). In this step, the sludge carried by the sewage entering the rainwater well chamber gradually sinks to the bottom of the sedimentation tank and forms a new sludge layer with the original sedimented sludge. S6, Energy Dissipation: In S5, some sewage enters the water collection hopper (21) of the energy dissipation mechanism (2) from the bottom of the intercepting hopper (1). The water collection hopper (21) with a conical structure collects the potential energy and then discharges vertically to impact the diffuser plate (24). The diffuser plate (24) guides the sewage to diffuse and dissipate energy around the rainwater well chamber. In this step, when the sewage after energy dissipation falls into the sedimentation tank, the impact on the newly deposited mud layer is reduced, and the sludge is prevented from entering the drain pipe (3) with the sewage and causing secondary pollution. At the same time, under the impact of the sewage, the diffuser plate (24) rebounds upward to expand the range of sewage diffusion and reduce the impact on the mud layer. S7, Sewage discharge: As sewage continuously enters the sedimentation tank, when the water level reaches the inlet of the drainage pipe (3), the sewage is discharged into the pipe network from the drainage pipe (3); In this step, when encountering heavy rainfall, the water level continues to rise beyond the inlet of the drainage pipe (3) and reaches the inlet of the return pipe (4), when the sewage enters the drainage pipe (3) from the return pipe (4) to avoid water backflow. S8, clean up sludge and remove sludge. Remove the rain grate (14) and support (13) in sequence, rotate the lifting handle (15) and apply upward lifting force to remove the intercepting hopper (1) and energy dissipation mechanism (2), pour out the fine debris particles in the intercepting hopper (1) and transfer them to the waste treatment plant; use a sludge pump to pump the sludge in the settling tank to the sludge truck and transfer it to the sludge treatment plant.

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